1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * libata-core.c - helper library for ATA
5 * Copyright 2003-2004 Red Hat, Inc. All rights reserved.
6 * Copyright 2003-2004 Jeff Garzik
8 * libata documentation is available via 'make {ps|pdf}docs',
9 * as Documentation/driver-api/libata.rst
11 * Hardware documentation available from http://www.t13.org/ and
12 * http://www.sata-io.org/
14 * Standards documents from:
15 * http://www.t13.org (ATA standards, PCI DMA IDE spec)
16 * http://www.t10.org (SCSI MMC - for ATAPI MMC)
17 * http://www.sata-io.org (SATA)
18 * http://www.compactflash.org (CF)
19 * http://www.qic.org (QIC157 - Tape and DSC)
20 * http://www.ce-ata.org (CE-ATA: not supported)
22 * libata is essentially a library of internal helper functions for
23 * low-level ATA host controller drivers. As such, the API/ABI is
24 * likely to change as new drivers are added and updated.
25 * Do not depend on ABI/API stability.
28 #include <linux/kernel.h>
29 #include <linux/module.h>
30 #include <linux/pci.h>
31 #include <linux/init.h>
32 #include <linux/list.h>
34 #include <linux/spinlock.h>
35 #include <linux/blkdev.h>
36 #include <linux/delay.h>
37 #include <linux/timer.h>
38 #include <linux/time.h>
39 #include <linux/interrupt.h>
40 #include <linux/completion.h>
41 #include <linux/suspend.h>
42 #include <linux/workqueue.h>
43 #include <linux/scatterlist.h>
45 #include <linux/log2.h>
46 #include <linux/slab.h>
47 #include <linux/glob.h>
48 #include <scsi/scsi.h>
49 #include <scsi/scsi_cmnd.h>
50 #include <scsi/scsi_host.h>
51 #include <linux/libata.h>
52 #include <asm/byteorder.h>
53 #include <asm/unaligned.h>
54 #include <linux/cdrom.h>
55 #include <linux/ratelimit.h>
56 #include <linux/leds.h>
57 #include <linux/pm_runtime.h>
58 #include <linux/platform_device.h>
59 #include <asm/setup.h>
61 #define CREATE_TRACE_POINTS
62 #include <trace/events/libata.h>
65 #include "libata-transport.h"
67 const struct ata_port_operations ata_base_port_ops
= {
68 .prereset
= ata_std_prereset
,
69 .postreset
= ata_std_postreset
,
70 .error_handler
= ata_std_error_handler
,
71 .sched_eh
= ata_std_sched_eh
,
72 .end_eh
= ata_std_end_eh
,
75 const struct ata_port_operations sata_port_ops
= {
76 .inherits
= &ata_base_port_ops
,
78 .qc_defer
= ata_std_qc_defer
,
79 .hardreset
= sata_std_hardreset
,
81 EXPORT_SYMBOL_GPL(sata_port_ops
);
83 static unsigned int ata_dev_init_params(struct ata_device
*dev
,
84 u16 heads
, u16 sectors
);
85 static unsigned int ata_dev_set_xfermode(struct ata_device
*dev
);
86 static void ata_dev_xfermask(struct ata_device
*dev
);
87 static unsigned long ata_dev_blacklisted(const struct ata_device
*dev
);
89 atomic_t ata_print_id
= ATOMIC_INIT(0);
91 #ifdef CONFIG_ATA_FORCE
92 struct ata_force_param
{
96 unsigned int xfer_mask
;
97 unsigned int horkage_on
;
98 unsigned int horkage_off
;
103 struct ata_force_ent
{
106 struct ata_force_param param
;
109 static struct ata_force_ent
*ata_force_tbl
;
110 static int ata_force_tbl_size
;
112 static char ata_force_param_buf
[COMMAND_LINE_SIZE
] __initdata
;
113 /* param_buf is thrown away after initialization, disallow read */
114 module_param_string(force
, ata_force_param_buf
, sizeof(ata_force_param_buf
), 0);
115 MODULE_PARM_DESC(force
, "Force ATA configurations including cable type, link speed and transfer mode (see Documentation/admin-guide/kernel-parameters.rst for details)");
118 static int atapi_enabled
= 1;
119 module_param(atapi_enabled
, int, 0444);
120 MODULE_PARM_DESC(atapi_enabled
, "Enable discovery of ATAPI devices (0=off, 1=on [default])");
122 static int atapi_dmadir
= 0;
123 module_param(atapi_dmadir
, int, 0444);
124 MODULE_PARM_DESC(atapi_dmadir
, "Enable ATAPI DMADIR bridge support (0=off [default], 1=on)");
126 int atapi_passthru16
= 1;
127 module_param(atapi_passthru16
, int, 0444);
128 MODULE_PARM_DESC(atapi_passthru16
, "Enable ATA_16 passthru for ATAPI devices (0=off, 1=on [default])");
131 module_param_named(fua
, libata_fua
, int, 0444);
132 MODULE_PARM_DESC(fua
, "FUA support (0=off [default], 1=on)");
134 static int ata_ignore_hpa
;
135 module_param_named(ignore_hpa
, ata_ignore_hpa
, int, 0644);
136 MODULE_PARM_DESC(ignore_hpa
, "Ignore HPA limit (0=keep BIOS limits, 1=ignore limits, using full disk)");
138 static int libata_dma_mask
= ATA_DMA_MASK_ATA
|ATA_DMA_MASK_ATAPI
|ATA_DMA_MASK_CFA
;
139 module_param_named(dma
, libata_dma_mask
, int, 0444);
140 MODULE_PARM_DESC(dma
, "DMA enable/disable (0x1==ATA, 0x2==ATAPI, 0x4==CF)");
142 static int ata_probe_timeout
;
143 module_param(ata_probe_timeout
, int, 0444);
144 MODULE_PARM_DESC(ata_probe_timeout
, "Set ATA probing timeout (seconds)");
146 int libata_noacpi
= 0;
147 module_param_named(noacpi
, libata_noacpi
, int, 0444);
148 MODULE_PARM_DESC(noacpi
, "Disable the use of ACPI in probe/suspend/resume (0=off [default], 1=on)");
150 int libata_allow_tpm
= 0;
151 module_param_named(allow_tpm
, libata_allow_tpm
, int, 0444);
152 MODULE_PARM_DESC(allow_tpm
, "Permit the use of TPM commands (0=off [default], 1=on)");
155 module_param(atapi_an
, int, 0444);
156 MODULE_PARM_DESC(atapi_an
, "Enable ATAPI AN media presence notification (0=0ff [default], 1=on)");
158 MODULE_AUTHOR("Jeff Garzik");
159 MODULE_DESCRIPTION("Library module for ATA devices");
160 MODULE_LICENSE("GPL");
161 MODULE_VERSION(DRV_VERSION
);
163 static inline bool ata_dev_print_info(struct ata_device
*dev
)
165 struct ata_eh_context
*ehc
= &dev
->link
->eh_context
;
167 return ehc
->i
.flags
& ATA_EHI_PRINTINFO
;
170 static bool ata_sstatus_online(u32 sstatus
)
172 return (sstatus
& 0xf) == 0x3;
176 * ata_link_next - link iteration helper
177 * @link: the previous link, NULL to start
178 * @ap: ATA port containing links to iterate
179 * @mode: iteration mode, one of ATA_LITER_*
182 * Host lock or EH context.
185 * Pointer to the next link.
187 struct ata_link
*ata_link_next(struct ata_link
*link
, struct ata_port
*ap
,
188 enum ata_link_iter_mode mode
)
190 BUG_ON(mode
!= ATA_LITER_EDGE
&&
191 mode
!= ATA_LITER_PMP_FIRST
&& mode
!= ATA_LITER_HOST_FIRST
);
193 /* NULL link indicates start of iteration */
197 case ATA_LITER_PMP_FIRST
:
198 if (sata_pmp_attached(ap
))
201 case ATA_LITER_HOST_FIRST
:
205 /* we just iterated over the host link, what's next? */
206 if (link
== &ap
->link
)
208 case ATA_LITER_HOST_FIRST
:
209 if (sata_pmp_attached(ap
))
212 case ATA_LITER_PMP_FIRST
:
213 if (unlikely(ap
->slave_link
))
214 return ap
->slave_link
;
220 /* slave_link excludes PMP */
221 if (unlikely(link
== ap
->slave_link
))
224 /* we were over a PMP link */
225 if (++link
< ap
->pmp_link
+ ap
->nr_pmp_links
)
228 if (mode
== ATA_LITER_PMP_FIRST
)
233 EXPORT_SYMBOL_GPL(ata_link_next
);
236 * ata_dev_next - device iteration helper
237 * @dev: the previous device, NULL to start
238 * @link: ATA link containing devices to iterate
239 * @mode: iteration mode, one of ATA_DITER_*
242 * Host lock or EH context.
245 * Pointer to the next device.
247 struct ata_device
*ata_dev_next(struct ata_device
*dev
, struct ata_link
*link
,
248 enum ata_dev_iter_mode mode
)
250 BUG_ON(mode
!= ATA_DITER_ENABLED
&& mode
!= ATA_DITER_ENABLED_REVERSE
&&
251 mode
!= ATA_DITER_ALL
&& mode
!= ATA_DITER_ALL_REVERSE
);
253 /* NULL dev indicates start of iteration */
256 case ATA_DITER_ENABLED
:
260 case ATA_DITER_ENABLED_REVERSE
:
261 case ATA_DITER_ALL_REVERSE
:
262 dev
= link
->device
+ ata_link_max_devices(link
) - 1;
267 /* move to the next one */
269 case ATA_DITER_ENABLED
:
271 if (++dev
< link
->device
+ ata_link_max_devices(link
))
274 case ATA_DITER_ENABLED_REVERSE
:
275 case ATA_DITER_ALL_REVERSE
:
276 if (--dev
>= link
->device
)
282 if ((mode
== ATA_DITER_ENABLED
|| mode
== ATA_DITER_ENABLED_REVERSE
) &&
283 !ata_dev_enabled(dev
))
287 EXPORT_SYMBOL_GPL(ata_dev_next
);
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
;
314 #ifdef CONFIG_ATA_FORCE
316 * ata_force_cbl - force cable type according to libata.force
317 * @ap: ATA port of interest
319 * Force cable type according to libata.force and whine about it.
320 * The last entry which has matching port number is used, so it
321 * can be specified as part of device force parameters. For
322 * example, both "a:40c,1.00:udma4" and "1.00:40c,udma4" have the
328 void ata_force_cbl(struct ata_port
*ap
)
332 for (i
= ata_force_tbl_size
- 1; i
>= 0; i
--) {
333 const struct ata_force_ent
*fe
= &ata_force_tbl
[i
];
335 if (fe
->port
!= -1 && fe
->port
!= ap
->print_id
)
338 if (fe
->param
.cbl
== ATA_CBL_NONE
)
341 ap
->cbl
= fe
->param
.cbl
;
342 ata_port_notice(ap
, "FORCE: cable set to %s\n", fe
->param
.name
);
348 * ata_force_link_limits - force link limits according to libata.force
349 * @link: ATA link of interest
351 * Force link flags and SATA spd limit according to libata.force
352 * and whine about it. When only the port part is specified
353 * (e.g. 1:), the limit applies to all links connected to both
354 * the host link and all fan-out ports connected via PMP. If the
355 * device part is specified as 0 (e.g. 1.00:), it specifies the
356 * first fan-out link not the host link. Device number 15 always
357 * points to the host link whether PMP is attached or not. If the
358 * controller has slave link, device number 16 points to it.
363 static void ata_force_link_limits(struct ata_link
*link
)
365 bool did_spd
= false;
366 int linkno
= link
->pmp
;
369 if (ata_is_host_link(link
))
372 for (i
= ata_force_tbl_size
- 1; i
>= 0; i
--) {
373 const struct ata_force_ent
*fe
= &ata_force_tbl
[i
];
375 if (fe
->port
!= -1 && fe
->port
!= link
->ap
->print_id
)
378 if (fe
->device
!= -1 && fe
->device
!= linkno
)
381 /* only honor the first spd limit */
382 if (!did_spd
&& fe
->param
.spd_limit
) {
383 link
->hw_sata_spd_limit
= (1 << fe
->param
.spd_limit
) - 1;
384 ata_link_notice(link
, "FORCE: PHY spd limit set to %s\n",
389 /* let lflags stack */
390 if (fe
->param
.lflags_on
) {
391 link
->flags
|= fe
->param
.lflags_on
;
392 ata_link_notice(link
,
393 "FORCE: link flag 0x%x forced -> 0x%x\n",
394 fe
->param
.lflags_on
, link
->flags
);
396 if (fe
->param
.lflags_off
) {
397 link
->flags
&= ~fe
->param
.lflags_off
;
398 ata_link_notice(link
,
399 "FORCE: link flag 0x%x cleared -> 0x%x\n",
400 fe
->param
.lflags_off
, link
->flags
);
406 * ata_force_xfermask - force xfermask according to libata.force
407 * @dev: ATA device of interest
409 * Force xfer_mask according to libata.force and whine about it.
410 * For consistency with link selection, device number 15 selects
411 * the first device connected to the host link.
416 static void ata_force_xfermask(struct ata_device
*dev
)
418 int devno
= dev
->link
->pmp
+ dev
->devno
;
419 int alt_devno
= devno
;
422 /* allow n.15/16 for devices attached to host port */
423 if (ata_is_host_link(dev
->link
))
426 for (i
= ata_force_tbl_size
- 1; i
>= 0; i
--) {
427 const struct ata_force_ent
*fe
= &ata_force_tbl
[i
];
428 unsigned int pio_mask
, mwdma_mask
, udma_mask
;
430 if (fe
->port
!= -1 && fe
->port
!= dev
->link
->ap
->print_id
)
433 if (fe
->device
!= -1 && fe
->device
!= devno
&&
434 fe
->device
!= alt_devno
)
437 if (!fe
->param
.xfer_mask
)
440 ata_unpack_xfermask(fe
->param
.xfer_mask
,
441 &pio_mask
, &mwdma_mask
, &udma_mask
);
443 dev
->udma_mask
= udma_mask
;
444 else if (mwdma_mask
) {
446 dev
->mwdma_mask
= mwdma_mask
;
450 dev
->pio_mask
= pio_mask
;
453 ata_dev_notice(dev
, "FORCE: xfer_mask set to %s\n",
460 * ata_force_horkage - force horkage according to libata.force
461 * @dev: ATA device of interest
463 * Force horkage according to libata.force and whine about it.
464 * For consistency with link selection, device number 15 selects
465 * the first device connected to the host link.
470 static void ata_force_horkage(struct ata_device
*dev
)
472 int devno
= dev
->link
->pmp
+ dev
->devno
;
473 int alt_devno
= devno
;
476 /* allow n.15/16 for devices attached to host port */
477 if (ata_is_host_link(dev
->link
))
480 for (i
= 0; i
< ata_force_tbl_size
; i
++) {
481 const struct ata_force_ent
*fe
= &ata_force_tbl
[i
];
483 if (fe
->port
!= -1 && fe
->port
!= dev
->link
->ap
->print_id
)
486 if (fe
->device
!= -1 && fe
->device
!= devno
&&
487 fe
->device
!= alt_devno
)
490 if (!(~dev
->horkage
& fe
->param
.horkage_on
) &&
491 !(dev
->horkage
& fe
->param
.horkage_off
))
494 dev
->horkage
|= fe
->param
.horkage_on
;
495 dev
->horkage
&= ~fe
->param
.horkage_off
;
497 ata_dev_notice(dev
, "FORCE: horkage modified (%s)\n",
502 static inline void ata_force_link_limits(struct ata_link
*link
) { }
503 static inline void ata_force_xfermask(struct ata_device
*dev
) { }
504 static inline void ata_force_horkage(struct ata_device
*dev
) { }
508 * atapi_cmd_type - Determine ATAPI command type from SCSI opcode
509 * @opcode: SCSI opcode
511 * Determine ATAPI command type from @opcode.
517 * ATAPI_{READ|WRITE|READ_CD|PASS_THRU|MISC}
519 int atapi_cmd_type(u8 opcode
)
528 case GPCMD_WRITE_AND_VERIFY_10
:
532 case GPCMD_READ_CD_MSF
:
533 return ATAPI_READ_CD
;
537 if (atapi_passthru16
)
538 return ATAPI_PASS_THRU
;
544 EXPORT_SYMBOL_GPL(atapi_cmd_type
);
546 static const u8 ata_rw_cmds
[] = {
550 ATA_CMD_READ_MULTI_EXT
,
551 ATA_CMD_WRITE_MULTI_EXT
,
555 ATA_CMD_WRITE_MULTI_FUA_EXT
,
559 ATA_CMD_PIO_READ_EXT
,
560 ATA_CMD_PIO_WRITE_EXT
,
573 ATA_CMD_WRITE_FUA_EXT
577 * ata_rwcmd_protocol - set taskfile r/w commands and protocol
578 * @tf: command to examine and configure
579 * @dev: device tf belongs to
581 * Examine the device configuration and tf->flags to calculate
582 * the proper read/write commands and protocol to use.
587 static int ata_rwcmd_protocol(struct ata_taskfile
*tf
, struct ata_device
*dev
)
591 int index
, fua
, lba48
, write
;
593 fua
= (tf
->flags
& ATA_TFLAG_FUA
) ? 4 : 0;
594 lba48
= (tf
->flags
& ATA_TFLAG_LBA48
) ? 2 : 0;
595 write
= (tf
->flags
& ATA_TFLAG_WRITE
) ? 1 : 0;
597 if (dev
->flags
& ATA_DFLAG_PIO
) {
598 tf
->protocol
= ATA_PROT_PIO
;
599 index
= dev
->multi_count
? 0 : 8;
600 } else if (lba48
&& (dev
->link
->ap
->flags
& ATA_FLAG_PIO_LBA48
)) {
601 /* Unable to use DMA due to host limitation */
602 tf
->protocol
= ATA_PROT_PIO
;
603 index
= dev
->multi_count
? 0 : 8;
605 tf
->protocol
= ATA_PROT_DMA
;
609 cmd
= ata_rw_cmds
[index
+ fua
+ lba48
+ write
];
618 * ata_tf_read_block - Read block address from ATA taskfile
619 * @tf: ATA taskfile of interest
620 * @dev: ATA device @tf belongs to
625 * Read block address from @tf. This function can handle all
626 * three address formats - LBA, LBA48 and CHS. tf->protocol and
627 * flags select the address format to use.
630 * Block address read from @tf.
632 u64
ata_tf_read_block(const struct ata_taskfile
*tf
, struct ata_device
*dev
)
636 if (tf
->flags
& ATA_TFLAG_LBA
) {
637 if (tf
->flags
& ATA_TFLAG_LBA48
) {
638 block
|= (u64
)tf
->hob_lbah
<< 40;
639 block
|= (u64
)tf
->hob_lbam
<< 32;
640 block
|= (u64
)tf
->hob_lbal
<< 24;
642 block
|= (tf
->device
& 0xf) << 24;
644 block
|= tf
->lbah
<< 16;
645 block
|= tf
->lbam
<< 8;
650 cyl
= tf
->lbam
| (tf
->lbah
<< 8);
651 head
= tf
->device
& 0xf;
656 "device reported invalid CHS sector 0\n");
660 block
= (cyl
* dev
->heads
+ head
) * dev
->sectors
+ sect
- 1;
667 * ata_build_rw_tf - Build ATA taskfile for given read/write request
668 * @tf: Target ATA taskfile
669 * @dev: ATA device @tf belongs to
670 * @block: Block address
671 * @n_block: Number of blocks
672 * @tf_flags: RW/FUA etc...
674 * @class: IO priority class
679 * Build ATA taskfile @tf for read/write request described by
680 * @block, @n_block, @tf_flags and @tag on @dev.
684 * 0 on success, -ERANGE if the request is too large for @dev,
685 * -EINVAL if the request is invalid.
687 int ata_build_rw_tf(struct ata_taskfile
*tf
, struct ata_device
*dev
,
688 u64 block
, u32 n_block
, unsigned int tf_flags
,
689 unsigned int tag
, int class)
691 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
692 tf
->flags
|= tf_flags
;
694 if (ata_ncq_enabled(dev
) && !ata_tag_internal(tag
)) {
696 if (!lba_48_ok(block
, n_block
))
699 tf
->protocol
= ATA_PROT_NCQ
;
700 tf
->flags
|= ATA_TFLAG_LBA
| ATA_TFLAG_LBA48
;
702 if (tf
->flags
& ATA_TFLAG_WRITE
)
703 tf
->command
= ATA_CMD_FPDMA_WRITE
;
705 tf
->command
= ATA_CMD_FPDMA_READ
;
707 tf
->nsect
= tag
<< 3;
708 tf
->hob_feature
= (n_block
>> 8) & 0xff;
709 tf
->feature
= n_block
& 0xff;
711 tf
->hob_lbah
= (block
>> 40) & 0xff;
712 tf
->hob_lbam
= (block
>> 32) & 0xff;
713 tf
->hob_lbal
= (block
>> 24) & 0xff;
714 tf
->lbah
= (block
>> 16) & 0xff;
715 tf
->lbam
= (block
>> 8) & 0xff;
716 tf
->lbal
= block
& 0xff;
718 tf
->device
= ATA_LBA
;
719 if (tf
->flags
& ATA_TFLAG_FUA
)
720 tf
->device
|= 1 << 7;
722 if (dev
->flags
& ATA_DFLAG_NCQ_PRIO_ENABLE
&&
723 class == IOPRIO_CLASS_RT
)
724 tf
->hob_nsect
|= ATA_PRIO_HIGH
<< ATA_SHIFT_PRIO
;
725 } else if (dev
->flags
& ATA_DFLAG_LBA
) {
726 tf
->flags
|= ATA_TFLAG_LBA
;
728 if (lba_28_ok(block
, n_block
)) {
730 tf
->device
|= (block
>> 24) & 0xf;
731 } else if (lba_48_ok(block
, n_block
)) {
732 if (!(dev
->flags
& ATA_DFLAG_LBA48
))
736 tf
->flags
|= ATA_TFLAG_LBA48
;
738 tf
->hob_nsect
= (n_block
>> 8) & 0xff;
740 tf
->hob_lbah
= (block
>> 40) & 0xff;
741 tf
->hob_lbam
= (block
>> 32) & 0xff;
742 tf
->hob_lbal
= (block
>> 24) & 0xff;
744 /* request too large even for LBA48 */
747 if (unlikely(ata_rwcmd_protocol(tf
, dev
) < 0))
750 tf
->nsect
= n_block
& 0xff;
752 tf
->lbah
= (block
>> 16) & 0xff;
753 tf
->lbam
= (block
>> 8) & 0xff;
754 tf
->lbal
= block
& 0xff;
756 tf
->device
|= ATA_LBA
;
759 u32 sect
, head
, cyl
, track
;
761 /* The request -may- be too large for CHS addressing. */
762 if (!lba_28_ok(block
, n_block
))
765 if (unlikely(ata_rwcmd_protocol(tf
, dev
) < 0))
768 /* Convert LBA to CHS */
769 track
= (u32
)block
/ dev
->sectors
;
770 cyl
= track
/ dev
->heads
;
771 head
= track
% dev
->heads
;
772 sect
= (u32
)block
% dev
->sectors
+ 1;
774 /* Check whether the converted CHS can fit.
778 if ((cyl
>> 16) || (head
>> 4) || (sect
>> 8) || (!sect
))
781 tf
->nsect
= n_block
& 0xff; /* Sector count 0 means 256 sectors */
792 * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask
793 * @pio_mask: pio_mask
794 * @mwdma_mask: mwdma_mask
795 * @udma_mask: udma_mask
797 * Pack @pio_mask, @mwdma_mask and @udma_mask into a single
798 * unsigned int xfer_mask.
806 unsigned int ata_pack_xfermask(unsigned int pio_mask
,
807 unsigned int mwdma_mask
,
808 unsigned int udma_mask
)
810 return ((pio_mask
<< ATA_SHIFT_PIO
) & ATA_MASK_PIO
) |
811 ((mwdma_mask
<< ATA_SHIFT_MWDMA
) & ATA_MASK_MWDMA
) |
812 ((udma_mask
<< ATA_SHIFT_UDMA
) & ATA_MASK_UDMA
);
814 EXPORT_SYMBOL_GPL(ata_pack_xfermask
);
817 * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks
818 * @xfer_mask: xfer_mask to unpack
819 * @pio_mask: resulting pio_mask
820 * @mwdma_mask: resulting mwdma_mask
821 * @udma_mask: resulting udma_mask
823 * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask.
824 * Any NULL destination masks will be ignored.
826 void ata_unpack_xfermask(unsigned int xfer_mask
, unsigned int *pio_mask
,
827 unsigned int *mwdma_mask
, unsigned int *udma_mask
)
830 *pio_mask
= (xfer_mask
& ATA_MASK_PIO
) >> ATA_SHIFT_PIO
;
832 *mwdma_mask
= (xfer_mask
& ATA_MASK_MWDMA
) >> ATA_SHIFT_MWDMA
;
834 *udma_mask
= (xfer_mask
& ATA_MASK_UDMA
) >> ATA_SHIFT_UDMA
;
837 static const struct ata_xfer_ent
{
841 { ATA_SHIFT_PIO
, ATA_NR_PIO_MODES
, XFER_PIO_0
},
842 { ATA_SHIFT_MWDMA
, ATA_NR_MWDMA_MODES
, XFER_MW_DMA_0
},
843 { ATA_SHIFT_UDMA
, ATA_NR_UDMA_MODES
, XFER_UDMA_0
},
848 * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask
849 * @xfer_mask: xfer_mask of interest
851 * Return matching XFER_* value for @xfer_mask. Only the highest
852 * bit of @xfer_mask is considered.
858 * Matching XFER_* value, 0xff if no match found.
860 u8
ata_xfer_mask2mode(unsigned int xfer_mask
)
862 int highbit
= fls(xfer_mask
) - 1;
863 const struct ata_xfer_ent
*ent
;
865 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
866 if (highbit
>= ent
->shift
&& highbit
< ent
->shift
+ ent
->bits
)
867 return ent
->base
+ highbit
- ent
->shift
;
870 EXPORT_SYMBOL_GPL(ata_xfer_mask2mode
);
873 * ata_xfer_mode2mask - Find matching xfer_mask for XFER_*
874 * @xfer_mode: XFER_* of interest
876 * Return matching xfer_mask for @xfer_mode.
882 * Matching xfer_mask, 0 if no match found.
884 unsigned int ata_xfer_mode2mask(u8 xfer_mode
)
886 const struct ata_xfer_ent
*ent
;
888 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
889 if (xfer_mode
>= ent
->base
&& xfer_mode
< ent
->base
+ ent
->bits
)
890 return ((2 << (ent
->shift
+ xfer_mode
- ent
->base
)) - 1)
891 & ~((1 << ent
->shift
) - 1);
894 EXPORT_SYMBOL_GPL(ata_xfer_mode2mask
);
897 * ata_xfer_mode2shift - Find matching xfer_shift for XFER_*
898 * @xfer_mode: XFER_* of interest
900 * Return matching xfer_shift for @xfer_mode.
906 * Matching xfer_shift, -1 if no match found.
908 int ata_xfer_mode2shift(u8 xfer_mode
)
910 const struct ata_xfer_ent
*ent
;
912 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
913 if (xfer_mode
>= ent
->base
&& xfer_mode
< ent
->base
+ ent
->bits
)
917 EXPORT_SYMBOL_GPL(ata_xfer_mode2shift
);
920 * ata_mode_string - convert xfer_mask to string
921 * @xfer_mask: mask of bits supported; only highest bit counts.
923 * Determine string which represents the highest speed
924 * (highest bit in @modemask).
930 * Constant C string representing highest speed listed in
931 * @mode_mask, or the constant C string "<n/a>".
933 const char *ata_mode_string(unsigned int xfer_mask
)
935 static const char * const xfer_mode_str
[] = {
959 highbit
= fls(xfer_mask
) - 1;
960 if (highbit
>= 0 && highbit
< ARRAY_SIZE(xfer_mode_str
))
961 return xfer_mode_str
[highbit
];
964 EXPORT_SYMBOL_GPL(ata_mode_string
);
966 const char *sata_spd_string(unsigned int spd
)
968 static const char * const spd_str
[] = {
974 if (spd
== 0 || (spd
- 1) >= ARRAY_SIZE(spd_str
))
976 return spd_str
[spd
- 1];
980 * ata_dev_classify - determine device type based on ATA-spec signature
981 * @tf: ATA taskfile register set for device to be identified
983 * Determine from taskfile register contents whether a device is
984 * ATA or ATAPI, as per "Signature and persistence" section
985 * of ATA/PI spec (volume 1, sect 5.14).
991 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, %ATA_DEV_PMP,
992 * %ATA_DEV_ZAC, or %ATA_DEV_UNKNOWN the event of failure.
994 unsigned int ata_dev_classify(const struct ata_taskfile
*tf
)
996 /* Apple's open source Darwin code hints that some devices only
997 * put a proper signature into the LBA mid/high registers,
998 * So, we only check those. It's sufficient for uniqueness.
1000 * ATA/ATAPI-7 (d1532v1r1: Feb. 19, 2003) specified separate
1001 * signatures for ATA and ATAPI devices attached on SerialATA,
1002 * 0x3c/0xc3 and 0x69/0x96 respectively. However, SerialATA
1003 * spec has never mentioned about using different signatures
1004 * for ATA/ATAPI devices. Then, Serial ATA II: Port
1005 * Multiplier specification began to use 0x69/0x96 to identify
1006 * port multpliers and 0x3c/0xc3 to identify SEMB device.
1007 * ATA/ATAPI-7 dropped descriptions about 0x3c/0xc3 and
1008 * 0x69/0x96 shortly and described them as reserved for
1011 * We follow the current spec and consider that 0x69/0x96
1012 * identifies a port multiplier and 0x3c/0xc3 a SEMB device.
1013 * Unfortunately, WDC WD1600JS-62MHB5 (a hard drive) reports
1014 * SEMB signature. This is worked around in
1015 * ata_dev_read_id().
1017 if (tf
->lbam
== 0 && tf
->lbah
== 0)
1020 if (tf
->lbam
== 0x14 && tf
->lbah
== 0xeb)
1021 return ATA_DEV_ATAPI
;
1023 if (tf
->lbam
== 0x69 && tf
->lbah
== 0x96)
1026 if (tf
->lbam
== 0x3c && tf
->lbah
== 0xc3)
1027 return ATA_DEV_SEMB
;
1029 if (tf
->lbam
== 0xcd && tf
->lbah
== 0xab)
1032 return ATA_DEV_UNKNOWN
;
1034 EXPORT_SYMBOL_GPL(ata_dev_classify
);
1037 * ata_id_string - Convert IDENTIFY DEVICE page into string
1038 * @id: IDENTIFY DEVICE results we will examine
1039 * @s: string into which data is output
1040 * @ofs: offset into identify device page
1041 * @len: length of string to return. must be an even number.
1043 * The strings in the IDENTIFY DEVICE page are broken up into
1044 * 16-bit chunks. Run through the string, and output each
1045 * 8-bit chunk linearly, regardless of platform.
1051 void ata_id_string(const u16
*id
, unsigned char *s
,
1052 unsigned int ofs
, unsigned int len
)
1071 EXPORT_SYMBOL_GPL(ata_id_string
);
1074 * ata_id_c_string - Convert IDENTIFY DEVICE page into C string
1075 * @id: IDENTIFY DEVICE results we will examine
1076 * @s: string into which data is output
1077 * @ofs: offset into identify device page
1078 * @len: length of string to return. must be an odd number.
1080 * This function is identical to ata_id_string except that it
1081 * trims trailing spaces and terminates the resulting string with
1082 * null. @len must be actual maximum length (even number) + 1.
1087 void ata_id_c_string(const u16
*id
, unsigned char *s
,
1088 unsigned int ofs
, unsigned int len
)
1092 ata_id_string(id
, s
, ofs
, len
- 1);
1094 p
= s
+ strnlen(s
, len
- 1);
1095 while (p
> s
&& p
[-1] == ' ')
1099 EXPORT_SYMBOL_GPL(ata_id_c_string
);
1101 static u64
ata_id_n_sectors(const u16
*id
)
1103 if (ata_id_has_lba(id
)) {
1104 if (ata_id_has_lba48(id
))
1105 return ata_id_u64(id
, ATA_ID_LBA_CAPACITY_2
);
1107 return ata_id_u32(id
, ATA_ID_LBA_CAPACITY
);
1110 if (ata_id_current_chs_valid(id
))
1111 return (u32
)id
[ATA_ID_CUR_CYLS
] * (u32
)id
[ATA_ID_CUR_HEADS
] *
1112 (u32
)id
[ATA_ID_CUR_SECTORS
];
1114 return (u32
)id
[ATA_ID_CYLS
] * (u32
)id
[ATA_ID_HEADS
] *
1115 (u32
)id
[ATA_ID_SECTORS
];
1118 u64
ata_tf_to_lba48(const struct ata_taskfile
*tf
)
1122 sectors
|= ((u64
)(tf
->hob_lbah
& 0xff)) << 40;
1123 sectors
|= ((u64
)(tf
->hob_lbam
& 0xff)) << 32;
1124 sectors
|= ((u64
)(tf
->hob_lbal
& 0xff)) << 24;
1125 sectors
|= (tf
->lbah
& 0xff) << 16;
1126 sectors
|= (tf
->lbam
& 0xff) << 8;
1127 sectors
|= (tf
->lbal
& 0xff);
1132 u64
ata_tf_to_lba(const struct ata_taskfile
*tf
)
1136 sectors
|= (tf
->device
& 0x0f) << 24;
1137 sectors
|= (tf
->lbah
& 0xff) << 16;
1138 sectors
|= (tf
->lbam
& 0xff) << 8;
1139 sectors
|= (tf
->lbal
& 0xff);
1145 * ata_read_native_max_address - Read native max address
1146 * @dev: target device
1147 * @max_sectors: out parameter for the result native max address
1149 * Perform an LBA48 or LBA28 native size query upon the device in
1153 * 0 on success, -EACCES if command is aborted by the drive.
1154 * -EIO on other errors.
1156 static int ata_read_native_max_address(struct ata_device
*dev
, u64
*max_sectors
)
1158 unsigned int err_mask
;
1159 struct ata_taskfile tf
;
1160 int lba48
= ata_id_has_lba48(dev
->id
);
1162 ata_tf_init(dev
, &tf
);
1164 /* always clear all address registers */
1165 tf
.flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
1168 tf
.command
= ATA_CMD_READ_NATIVE_MAX_EXT
;
1169 tf
.flags
|= ATA_TFLAG_LBA48
;
1171 tf
.command
= ATA_CMD_READ_NATIVE_MAX
;
1173 tf
.protocol
= ATA_PROT_NODATA
;
1174 tf
.device
|= ATA_LBA
;
1176 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
1179 "failed to read native max address (err_mask=0x%x)\n",
1181 if (err_mask
== AC_ERR_DEV
&& (tf
.error
& ATA_ABORTED
))
1187 *max_sectors
= ata_tf_to_lba48(&tf
) + 1;
1189 *max_sectors
= ata_tf_to_lba(&tf
) + 1;
1190 if (dev
->horkage
& ATA_HORKAGE_HPA_SIZE
)
1196 * ata_set_max_sectors - Set max sectors
1197 * @dev: target device
1198 * @new_sectors: new max sectors value to set for the device
1200 * Set max sectors of @dev to @new_sectors.
1203 * 0 on success, -EACCES if command is aborted or denied (due to
1204 * previous non-volatile SET_MAX) by the drive. -EIO on other
1207 static int ata_set_max_sectors(struct ata_device
*dev
, u64 new_sectors
)
1209 unsigned int err_mask
;
1210 struct ata_taskfile tf
;
1211 int lba48
= ata_id_has_lba48(dev
->id
);
1215 ata_tf_init(dev
, &tf
);
1217 tf
.flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
1220 tf
.command
= ATA_CMD_SET_MAX_EXT
;
1221 tf
.flags
|= ATA_TFLAG_LBA48
;
1223 tf
.hob_lbal
= (new_sectors
>> 24) & 0xff;
1224 tf
.hob_lbam
= (new_sectors
>> 32) & 0xff;
1225 tf
.hob_lbah
= (new_sectors
>> 40) & 0xff;
1227 tf
.command
= ATA_CMD_SET_MAX
;
1229 tf
.device
|= (new_sectors
>> 24) & 0xf;
1232 tf
.protocol
= ATA_PROT_NODATA
;
1233 tf
.device
|= ATA_LBA
;
1235 tf
.lbal
= (new_sectors
>> 0) & 0xff;
1236 tf
.lbam
= (new_sectors
>> 8) & 0xff;
1237 tf
.lbah
= (new_sectors
>> 16) & 0xff;
1239 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
1242 "failed to set max address (err_mask=0x%x)\n",
1244 if (err_mask
== AC_ERR_DEV
&&
1245 (tf
.error
& (ATA_ABORTED
| ATA_IDNF
)))
1254 * ata_hpa_resize - Resize a device with an HPA set
1255 * @dev: Device to resize
1257 * Read the size of an LBA28 or LBA48 disk with HPA features and resize
1258 * it if required to the full size of the media. The caller must check
1259 * the drive has the HPA feature set enabled.
1262 * 0 on success, -errno on failure.
1264 static int ata_hpa_resize(struct ata_device
*dev
)
1266 bool print_info
= ata_dev_print_info(dev
);
1267 bool unlock_hpa
= ata_ignore_hpa
|| dev
->flags
& ATA_DFLAG_UNLOCK_HPA
;
1268 u64 sectors
= ata_id_n_sectors(dev
->id
);
1272 /* do we need to do it? */
1273 if ((dev
->class != ATA_DEV_ATA
&& dev
->class != ATA_DEV_ZAC
) ||
1274 !ata_id_has_lba(dev
->id
) || !ata_id_hpa_enabled(dev
->id
) ||
1275 (dev
->horkage
& ATA_HORKAGE_BROKEN_HPA
))
1278 /* read native max address */
1279 rc
= ata_read_native_max_address(dev
, &native_sectors
);
1281 /* If device aborted the command or HPA isn't going to
1282 * be unlocked, skip HPA resizing.
1284 if (rc
== -EACCES
|| !unlock_hpa
) {
1286 "HPA support seems broken, skipping HPA handling\n");
1287 dev
->horkage
|= ATA_HORKAGE_BROKEN_HPA
;
1289 /* we can continue if device aborted the command */
1296 dev
->n_native_sectors
= native_sectors
;
1298 /* nothing to do? */
1299 if (native_sectors
<= sectors
|| !unlock_hpa
) {
1300 if (!print_info
|| native_sectors
== sectors
)
1303 if (native_sectors
> sectors
)
1305 "HPA detected: current %llu, native %llu\n",
1306 (unsigned long long)sectors
,
1307 (unsigned long long)native_sectors
);
1308 else if (native_sectors
< sectors
)
1310 "native sectors (%llu) is smaller than sectors (%llu)\n",
1311 (unsigned long long)native_sectors
,
1312 (unsigned long long)sectors
);
1316 /* let's unlock HPA */
1317 rc
= ata_set_max_sectors(dev
, native_sectors
);
1318 if (rc
== -EACCES
) {
1319 /* if device aborted the command, skip HPA resizing */
1321 "device aborted resize (%llu -> %llu), skipping HPA handling\n",
1322 (unsigned long long)sectors
,
1323 (unsigned long long)native_sectors
);
1324 dev
->horkage
|= ATA_HORKAGE_BROKEN_HPA
;
1329 /* re-read IDENTIFY data */
1330 rc
= ata_dev_reread_id(dev
, 0);
1333 "failed to re-read IDENTIFY data after HPA resizing\n");
1338 u64 new_sectors
= ata_id_n_sectors(dev
->id
);
1340 "HPA unlocked: %llu -> %llu, native %llu\n",
1341 (unsigned long long)sectors
,
1342 (unsigned long long)new_sectors
,
1343 (unsigned long long)native_sectors
);
1350 * ata_dump_id - IDENTIFY DEVICE info debugging output
1351 * @dev: device from which the information is fetched
1352 * @id: IDENTIFY DEVICE page to dump
1354 * Dump selected 16-bit words from the given IDENTIFY DEVICE
1361 static inline void ata_dump_id(struct ata_device
*dev
, const u16
*id
)
1364 "49==0x%04x 53==0x%04x 63==0x%04x 64==0x%04x 75==0x%04x\n"
1365 "80==0x%04x 81==0x%04x 82==0x%04x 83==0x%04x 84==0x%04x\n"
1366 "88==0x%04x 93==0x%04x\n",
1367 id
[49], id
[53], id
[63], id
[64], id
[75], id
[80],
1368 id
[81], id
[82], id
[83], id
[84], id
[88], id
[93]);
1372 * ata_id_xfermask - Compute xfermask from the given IDENTIFY data
1373 * @id: IDENTIFY data to compute xfer mask from
1375 * Compute the xfermask for this device. This is not as trivial
1376 * as it seems if we must consider early devices correctly.
1378 * FIXME: pre IDE drive timing (do we care ?).
1386 unsigned int ata_id_xfermask(const u16
*id
)
1388 unsigned int pio_mask
, mwdma_mask
, udma_mask
;
1390 /* Usual case. Word 53 indicates word 64 is valid */
1391 if (id
[ATA_ID_FIELD_VALID
] & (1 << 1)) {
1392 pio_mask
= id
[ATA_ID_PIO_MODES
] & 0x03;
1396 /* If word 64 isn't valid then Word 51 high byte holds
1397 * the PIO timing number for the maximum. Turn it into
1400 u8 mode
= (id
[ATA_ID_OLD_PIO_MODES
] >> 8) & 0xFF;
1401 if (mode
< 5) /* Valid PIO range */
1402 pio_mask
= (2 << mode
) - 1;
1406 /* But wait.. there's more. Design your standards by
1407 * committee and you too can get a free iordy field to
1408 * process. However it is the speeds not the modes that
1409 * are supported... Note drivers using the timing API
1410 * will get this right anyway
1414 mwdma_mask
= id
[ATA_ID_MWDMA_MODES
] & 0x07;
1416 if (ata_id_is_cfa(id
)) {
1418 * Process compact flash extended modes
1420 int pio
= (id
[ATA_ID_CFA_MODES
] >> 0) & 0x7;
1421 int dma
= (id
[ATA_ID_CFA_MODES
] >> 3) & 0x7;
1424 pio_mask
|= (1 << 5);
1426 pio_mask
|= (1 << 6);
1428 mwdma_mask
|= (1 << 3);
1430 mwdma_mask
|= (1 << 4);
1434 if (id
[ATA_ID_FIELD_VALID
] & (1 << 2))
1435 udma_mask
= id
[ATA_ID_UDMA_MODES
] & 0xff;
1437 return ata_pack_xfermask(pio_mask
, mwdma_mask
, udma_mask
);
1439 EXPORT_SYMBOL_GPL(ata_id_xfermask
);
1441 static void ata_qc_complete_internal(struct ata_queued_cmd
*qc
)
1443 struct completion
*waiting
= qc
->private_data
;
1449 * ata_exec_internal_sg - execute libata internal command
1450 * @dev: Device to which the command is sent
1451 * @tf: Taskfile registers for the command and the result
1452 * @cdb: CDB for packet command
1453 * @dma_dir: Data transfer direction of the command
1454 * @sgl: sg list for the data buffer of the command
1455 * @n_elem: Number of sg entries
1456 * @timeout: Timeout in msecs (0 for default)
1458 * Executes libata internal command with timeout. @tf contains
1459 * command on entry and result on return. Timeout and error
1460 * conditions are reported via return value. No recovery action
1461 * is taken after a command times out. It's caller's duty to
1462 * clean up after timeout.
1465 * None. Should be called with kernel context, might sleep.
1468 * Zero on success, AC_ERR_* mask on failure
1470 static unsigned ata_exec_internal_sg(struct ata_device
*dev
,
1471 struct ata_taskfile
*tf
, const u8
*cdb
,
1472 int dma_dir
, struct scatterlist
*sgl
,
1473 unsigned int n_elem
, unsigned int timeout
)
1475 struct ata_link
*link
= dev
->link
;
1476 struct ata_port
*ap
= link
->ap
;
1477 u8 command
= tf
->command
;
1478 int auto_timeout
= 0;
1479 struct ata_queued_cmd
*qc
;
1480 unsigned int preempted_tag
;
1481 u32 preempted_sactive
;
1482 u64 preempted_qc_active
;
1483 int preempted_nr_active_links
;
1484 DECLARE_COMPLETION_ONSTACK(wait
);
1485 unsigned long flags
;
1486 unsigned int err_mask
;
1489 spin_lock_irqsave(ap
->lock
, flags
);
1491 /* no internal command while frozen */
1492 if (ap
->pflags
& ATA_PFLAG_FROZEN
) {
1493 spin_unlock_irqrestore(ap
->lock
, flags
);
1494 return AC_ERR_SYSTEM
;
1497 /* initialize internal qc */
1498 qc
= __ata_qc_from_tag(ap
, ATA_TAG_INTERNAL
);
1500 qc
->tag
= ATA_TAG_INTERNAL
;
1507 preempted_tag
= link
->active_tag
;
1508 preempted_sactive
= link
->sactive
;
1509 preempted_qc_active
= ap
->qc_active
;
1510 preempted_nr_active_links
= ap
->nr_active_links
;
1511 link
->active_tag
= ATA_TAG_POISON
;
1514 ap
->nr_active_links
= 0;
1516 /* prepare & issue qc */
1519 memcpy(qc
->cdb
, cdb
, ATAPI_CDB_LEN
);
1521 /* some SATA bridges need us to indicate data xfer direction */
1522 if (tf
->protocol
== ATAPI_PROT_DMA
&& (dev
->flags
& ATA_DFLAG_DMADIR
) &&
1523 dma_dir
== DMA_FROM_DEVICE
)
1524 qc
->tf
.feature
|= ATAPI_DMADIR
;
1526 qc
->flags
|= ATA_QCFLAG_RESULT_TF
;
1527 qc
->dma_dir
= dma_dir
;
1528 if (dma_dir
!= DMA_NONE
) {
1529 unsigned int i
, buflen
= 0;
1530 struct scatterlist
*sg
;
1532 for_each_sg(sgl
, sg
, n_elem
, i
)
1533 buflen
+= sg
->length
;
1535 ata_sg_init(qc
, sgl
, n_elem
);
1536 qc
->nbytes
= buflen
;
1539 qc
->private_data
= &wait
;
1540 qc
->complete_fn
= ata_qc_complete_internal
;
1544 spin_unlock_irqrestore(ap
->lock
, flags
);
1547 if (ata_probe_timeout
)
1548 timeout
= ata_probe_timeout
* 1000;
1550 timeout
= ata_internal_cmd_timeout(dev
, command
);
1555 if (ap
->ops
->error_handler
)
1558 rc
= wait_for_completion_timeout(&wait
, msecs_to_jiffies(timeout
));
1560 if (ap
->ops
->error_handler
)
1563 ata_sff_flush_pio_task(ap
);
1566 spin_lock_irqsave(ap
->lock
, flags
);
1568 /* We're racing with irq here. If we lose, the
1569 * following test prevents us from completing the qc
1570 * twice. If we win, the port is frozen and will be
1571 * cleaned up by ->post_internal_cmd().
1573 if (qc
->flags
& ATA_QCFLAG_ACTIVE
) {
1574 qc
->err_mask
|= AC_ERR_TIMEOUT
;
1576 if (ap
->ops
->error_handler
)
1577 ata_port_freeze(ap
);
1579 ata_qc_complete(qc
);
1581 ata_dev_warn(dev
, "qc timeout (cmd 0x%x)\n",
1585 spin_unlock_irqrestore(ap
->lock
, flags
);
1588 /* do post_internal_cmd */
1589 if (ap
->ops
->post_internal_cmd
)
1590 ap
->ops
->post_internal_cmd(qc
);
1592 /* perform minimal error analysis */
1593 if (qc
->flags
& ATA_QCFLAG_FAILED
) {
1594 if (qc
->result_tf
.status
& (ATA_ERR
| ATA_DF
))
1595 qc
->err_mask
|= AC_ERR_DEV
;
1598 qc
->err_mask
|= AC_ERR_OTHER
;
1600 if (qc
->err_mask
& ~AC_ERR_OTHER
)
1601 qc
->err_mask
&= ~AC_ERR_OTHER
;
1602 } else if (qc
->tf
.command
== ATA_CMD_REQ_SENSE_DATA
) {
1603 qc
->result_tf
.status
|= ATA_SENSE
;
1607 spin_lock_irqsave(ap
->lock
, flags
);
1609 *tf
= qc
->result_tf
;
1610 err_mask
= qc
->err_mask
;
1613 link
->active_tag
= preempted_tag
;
1614 link
->sactive
= preempted_sactive
;
1615 ap
->qc_active
= preempted_qc_active
;
1616 ap
->nr_active_links
= preempted_nr_active_links
;
1618 spin_unlock_irqrestore(ap
->lock
, flags
);
1620 if ((err_mask
& AC_ERR_TIMEOUT
) && auto_timeout
)
1621 ata_internal_cmd_timed_out(dev
, command
);
1627 * ata_exec_internal - execute libata internal command
1628 * @dev: Device to which the command is sent
1629 * @tf: Taskfile registers for the command and the result
1630 * @cdb: CDB for packet command
1631 * @dma_dir: Data transfer direction of the command
1632 * @buf: Data buffer of the command
1633 * @buflen: Length of data buffer
1634 * @timeout: Timeout in msecs (0 for default)
1636 * Wrapper around ata_exec_internal_sg() which takes simple
1637 * buffer instead of sg list.
1640 * None. Should be called with kernel context, might sleep.
1643 * Zero on success, AC_ERR_* mask on failure
1645 unsigned ata_exec_internal(struct ata_device
*dev
,
1646 struct ata_taskfile
*tf
, const u8
*cdb
,
1647 int dma_dir
, void *buf
, unsigned int buflen
,
1648 unsigned int timeout
)
1650 struct scatterlist
*psg
= NULL
, sg
;
1651 unsigned int n_elem
= 0;
1653 if (dma_dir
!= DMA_NONE
) {
1655 sg_init_one(&sg
, buf
, buflen
);
1660 return ata_exec_internal_sg(dev
, tf
, cdb
, dma_dir
, psg
, n_elem
,
1665 * ata_pio_need_iordy - check if iordy needed
1668 * Check if the current speed of the device requires IORDY. Used
1669 * by various controllers for chip configuration.
1671 unsigned int ata_pio_need_iordy(const struct ata_device
*adev
)
1673 /* Don't set IORDY if we're preparing for reset. IORDY may
1674 * lead to controller lock up on certain controllers if the
1675 * port is not occupied. See bko#11703 for details.
1677 if (adev
->link
->ap
->pflags
& ATA_PFLAG_RESETTING
)
1679 /* Controller doesn't support IORDY. Probably a pointless
1680 * check as the caller should know this.
1682 if (adev
->link
->ap
->flags
& ATA_FLAG_NO_IORDY
)
1684 /* CF spec. r4.1 Table 22 says no iordy on PIO5 and PIO6. */
1685 if (ata_id_is_cfa(adev
->id
)
1686 && (adev
->pio_mode
== XFER_PIO_5
|| adev
->pio_mode
== XFER_PIO_6
))
1688 /* PIO3 and higher it is mandatory */
1689 if (adev
->pio_mode
> XFER_PIO_2
)
1691 /* We turn it on when possible */
1692 if (ata_id_has_iordy(adev
->id
))
1696 EXPORT_SYMBOL_GPL(ata_pio_need_iordy
);
1699 * ata_pio_mask_no_iordy - Return the non IORDY mask
1702 * Compute the highest mode possible if we are not using iordy. Return
1703 * -1 if no iordy mode is available.
1705 static u32
ata_pio_mask_no_iordy(const struct ata_device
*adev
)
1707 /* If we have no drive specific rule, then PIO 2 is non IORDY */
1708 if (adev
->id
[ATA_ID_FIELD_VALID
] & 2) { /* EIDE */
1709 u16 pio
= adev
->id
[ATA_ID_EIDE_PIO
];
1710 /* Is the speed faster than the drive allows non IORDY ? */
1712 /* This is cycle times not frequency - watch the logic! */
1713 if (pio
> 240) /* PIO2 is 240nS per cycle */
1714 return 3 << ATA_SHIFT_PIO
;
1715 return 7 << ATA_SHIFT_PIO
;
1718 return 3 << ATA_SHIFT_PIO
;
1722 * ata_do_dev_read_id - default ID read method
1724 * @tf: proposed taskfile
1727 * Issue the identify taskfile and hand back the buffer containing
1728 * identify data. For some RAID controllers and for pre ATA devices
1729 * this function is wrapped or replaced by the driver
1731 unsigned int ata_do_dev_read_id(struct ata_device
*dev
,
1732 struct ata_taskfile
*tf
, __le16
*id
)
1734 return ata_exec_internal(dev
, tf
, NULL
, DMA_FROM_DEVICE
,
1735 id
, sizeof(id
[0]) * ATA_ID_WORDS
, 0);
1737 EXPORT_SYMBOL_GPL(ata_do_dev_read_id
);
1740 * ata_dev_read_id - Read ID data from the specified device
1741 * @dev: target device
1742 * @p_class: pointer to class of the target device (may be changed)
1743 * @flags: ATA_READID_* flags
1744 * @id: buffer to read IDENTIFY data into
1746 * Read ID data from the specified device. ATA_CMD_ID_ATA is
1747 * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
1748 * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS
1749 * for pre-ATA4 drives.
1751 * FIXME: ATA_CMD_ID_ATA is optional for early drives and right
1752 * now we abort if we hit that case.
1755 * Kernel thread context (may sleep)
1758 * 0 on success, -errno otherwise.
1760 int ata_dev_read_id(struct ata_device
*dev
, unsigned int *p_class
,
1761 unsigned int flags
, u16
*id
)
1763 struct ata_port
*ap
= dev
->link
->ap
;
1764 unsigned int class = *p_class
;
1765 struct ata_taskfile tf
;
1766 unsigned int err_mask
= 0;
1768 bool is_semb
= class == ATA_DEV_SEMB
;
1769 int may_fallback
= 1, tried_spinup
= 0;
1773 ata_tf_init(dev
, &tf
);
1777 class = ATA_DEV_ATA
; /* some hard drives report SEMB sig */
1781 tf
.command
= ATA_CMD_ID_ATA
;
1784 tf
.command
= ATA_CMD_ID_ATAPI
;
1788 reason
= "unsupported class";
1792 tf
.protocol
= ATA_PROT_PIO
;
1794 /* Some devices choke if TF registers contain garbage. Make
1795 * sure those are properly initialized.
1797 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
1799 /* Device presence detection is unreliable on some
1800 * controllers. Always poll IDENTIFY if available.
1802 tf
.flags
|= ATA_TFLAG_POLLING
;
1804 if (ap
->ops
->read_id
)
1805 err_mask
= ap
->ops
->read_id(dev
, &tf
, (__le16
*)id
);
1807 err_mask
= ata_do_dev_read_id(dev
, &tf
, (__le16
*)id
);
1810 if (err_mask
& AC_ERR_NODEV_HINT
) {
1811 ata_dev_dbg(dev
, "NODEV after polling detection\n");
1817 "IDENTIFY failed on device w/ SEMB sig, disabled\n");
1818 /* SEMB is not supported yet */
1819 *p_class
= ATA_DEV_SEMB_UNSUP
;
1823 if ((err_mask
== AC_ERR_DEV
) && (tf
.error
& ATA_ABORTED
)) {
1824 /* Device or controller might have reported
1825 * the wrong device class. Give a shot at the
1826 * other IDENTIFY if the current one is
1827 * aborted by the device.
1832 if (class == ATA_DEV_ATA
)
1833 class = ATA_DEV_ATAPI
;
1835 class = ATA_DEV_ATA
;
1839 /* Control reaches here iff the device aborted
1840 * both flavors of IDENTIFYs which happens
1841 * sometimes with phantom devices.
1844 "both IDENTIFYs aborted, assuming NODEV\n");
1849 reason
= "I/O error";
1853 if (dev
->horkage
& ATA_HORKAGE_DUMP_ID
) {
1854 ata_dev_info(dev
, "dumping IDENTIFY data, "
1855 "class=%d may_fallback=%d tried_spinup=%d\n",
1856 class, may_fallback
, tried_spinup
);
1857 print_hex_dump(KERN_INFO
, "", DUMP_PREFIX_OFFSET
,
1858 16, 2, id
, ATA_ID_WORDS
* sizeof(*id
), true);
1861 /* Falling back doesn't make sense if ID data was read
1862 * successfully at least once.
1866 swap_buf_le16(id
, ATA_ID_WORDS
);
1870 reason
= "device reports invalid type";
1872 if (class == ATA_DEV_ATA
|| class == ATA_DEV_ZAC
) {
1873 if (!ata_id_is_ata(id
) && !ata_id_is_cfa(id
))
1875 if (ap
->host
->flags
& ATA_HOST_IGNORE_ATA
&&
1876 ata_id_is_ata(id
)) {
1878 "host indicates ignore ATA devices, ignored\n");
1882 if (ata_id_is_ata(id
))
1886 if (!tried_spinup
&& (id
[2] == 0x37c8 || id
[2] == 0x738c)) {
1889 * Drive powered-up in standby mode, and requires a specific
1890 * SET_FEATURES spin-up subcommand before it will accept
1891 * anything other than the original IDENTIFY command.
1893 err_mask
= ata_dev_set_feature(dev
, SETFEATURES_SPINUP
, 0);
1894 if (err_mask
&& id
[2] != 0x738c) {
1896 reason
= "SPINUP failed";
1900 * If the drive initially returned incomplete IDENTIFY info,
1901 * we now must reissue the IDENTIFY command.
1903 if (id
[2] == 0x37c8)
1907 if ((flags
& ATA_READID_POSTRESET
) &&
1908 (class == ATA_DEV_ATA
|| class == ATA_DEV_ZAC
)) {
1910 * The exact sequence expected by certain pre-ATA4 drives is:
1912 * IDENTIFY (optional in early ATA)
1913 * INITIALIZE DEVICE PARAMETERS (later IDE and ATA)
1915 * Some drives were very specific about that exact sequence.
1917 * Note that ATA4 says lba is mandatory so the second check
1918 * should never trigger.
1920 if (ata_id_major_version(id
) < 4 || !ata_id_has_lba(id
)) {
1921 err_mask
= ata_dev_init_params(dev
, id
[3], id
[6]);
1924 reason
= "INIT_DEV_PARAMS failed";
1928 /* current CHS translation info (id[53-58]) might be
1929 * changed. reread the identify device info.
1931 flags
&= ~ATA_READID_POSTRESET
;
1941 ata_dev_warn(dev
, "failed to IDENTIFY (%s, err_mask=0x%x)\n",
1947 * ata_read_log_page - read a specific log page
1948 * @dev: target device
1950 * @page: page to read
1951 * @buf: buffer to store read page
1952 * @sectors: number of sectors to read
1954 * Read log page using READ_LOG_EXT command.
1957 * Kernel thread context (may sleep).
1960 * 0 on success, AC_ERR_* mask otherwise.
1962 unsigned int ata_read_log_page(struct ata_device
*dev
, u8 log
,
1963 u8 page
, void *buf
, unsigned int sectors
)
1965 unsigned long ap_flags
= dev
->link
->ap
->flags
;
1966 struct ata_taskfile tf
;
1967 unsigned int err_mask
;
1970 ata_dev_dbg(dev
, "read log page - log 0x%x, page 0x%x\n", log
, page
);
1973 * Return error without actually issuing the command on controllers
1974 * which e.g. lockup on a read log page.
1976 if (ap_flags
& ATA_FLAG_NO_LOG_PAGE
)
1980 ata_tf_init(dev
, &tf
);
1981 if (ata_dma_enabled(dev
) && ata_id_has_read_log_dma_ext(dev
->id
) &&
1982 !(dev
->horkage
& ATA_HORKAGE_NO_DMA_LOG
)) {
1983 tf
.command
= ATA_CMD_READ_LOG_DMA_EXT
;
1984 tf
.protocol
= ATA_PROT_DMA
;
1987 tf
.command
= ATA_CMD_READ_LOG_EXT
;
1988 tf
.protocol
= ATA_PROT_PIO
;
1994 tf
.hob_nsect
= sectors
>> 8;
1995 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_LBA48
| ATA_TFLAG_DEVICE
;
1997 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_FROM_DEVICE
,
1998 buf
, sectors
* ATA_SECT_SIZE
, 0);
2002 dev
->horkage
|= ATA_HORKAGE_NO_DMA_LOG
;
2006 "Read log 0x%02x page 0x%02x failed, Emask 0x%x\n",
2007 (unsigned int)log
, (unsigned int)page
, err_mask
);
2013 static int ata_log_supported(struct ata_device
*dev
, u8 log
)
2015 struct ata_port
*ap
= dev
->link
->ap
;
2017 if (dev
->horkage
& ATA_HORKAGE_NO_LOG_DIR
)
2020 if (ata_read_log_page(dev
, ATA_LOG_DIRECTORY
, 0, ap
->sector_buf
, 1))
2022 return get_unaligned_le16(&ap
->sector_buf
[log
* 2]);
2025 static bool ata_identify_page_supported(struct ata_device
*dev
, u8 page
)
2027 struct ata_port
*ap
= dev
->link
->ap
;
2028 unsigned int err
, i
;
2030 if (dev
->horkage
& ATA_HORKAGE_NO_ID_DEV_LOG
)
2033 if (!ata_log_supported(dev
, ATA_LOG_IDENTIFY_DEVICE
)) {
2035 * IDENTIFY DEVICE data log is defined as mandatory starting
2036 * with ACS-3 (ATA version 10). Warn about the missing log
2037 * for drives which implement this ATA level or above.
2039 if (ata_id_major_version(dev
->id
) >= 10)
2041 "ATA Identify Device Log not supported\n");
2042 dev
->horkage
|= ATA_HORKAGE_NO_ID_DEV_LOG
;
2047 * Read IDENTIFY DEVICE data log, page 0, to figure out if the page is
2050 err
= ata_read_log_page(dev
, ATA_LOG_IDENTIFY_DEVICE
, 0, ap
->sector_buf
,
2055 for (i
= 0; i
< ap
->sector_buf
[8]; i
++) {
2056 if (ap
->sector_buf
[9 + i
] == page
)
2063 static int ata_do_link_spd_horkage(struct ata_device
*dev
)
2065 struct ata_link
*plink
= ata_dev_phys_link(dev
);
2066 u32 target
, target_limit
;
2068 if (!sata_scr_valid(plink
))
2071 if (dev
->horkage
& ATA_HORKAGE_1_5_GBPS
)
2076 target_limit
= (1 << target
) - 1;
2078 /* if already on stricter limit, no need to push further */
2079 if (plink
->sata_spd_limit
<= target_limit
)
2082 plink
->sata_spd_limit
= target_limit
;
2084 /* Request another EH round by returning -EAGAIN if link is
2085 * going faster than the target speed. Forward progress is
2086 * guaranteed by setting sata_spd_limit to target_limit above.
2088 if (plink
->sata_spd
> target
) {
2089 ata_dev_info(dev
, "applying link speed limit horkage to %s\n",
2090 sata_spd_string(target
));
2096 static inline u8
ata_dev_knobble(struct ata_device
*dev
)
2098 struct ata_port
*ap
= dev
->link
->ap
;
2100 if (ata_dev_blacklisted(dev
) & ATA_HORKAGE_BRIDGE_OK
)
2103 return ((ap
->cbl
== ATA_CBL_SATA
) && (!ata_id_is_sata(dev
->id
)));
2106 static void ata_dev_config_ncq_send_recv(struct ata_device
*dev
)
2108 struct ata_port
*ap
= dev
->link
->ap
;
2109 unsigned int err_mask
;
2111 if (!ata_log_supported(dev
, ATA_LOG_NCQ_SEND_RECV
)) {
2112 ata_dev_warn(dev
, "NCQ Send/Recv Log not supported\n");
2115 err_mask
= ata_read_log_page(dev
, ATA_LOG_NCQ_SEND_RECV
,
2116 0, ap
->sector_buf
, 1);
2118 u8
*cmds
= dev
->ncq_send_recv_cmds
;
2120 dev
->flags
|= ATA_DFLAG_NCQ_SEND_RECV
;
2121 memcpy(cmds
, ap
->sector_buf
, ATA_LOG_NCQ_SEND_RECV_SIZE
);
2123 if (dev
->horkage
& ATA_HORKAGE_NO_NCQ_TRIM
) {
2124 ata_dev_dbg(dev
, "disabling queued TRIM support\n");
2125 cmds
[ATA_LOG_NCQ_SEND_RECV_DSM_OFFSET
] &=
2126 ~ATA_LOG_NCQ_SEND_RECV_DSM_TRIM
;
2131 static void ata_dev_config_ncq_non_data(struct ata_device
*dev
)
2133 struct ata_port
*ap
= dev
->link
->ap
;
2134 unsigned int err_mask
;
2136 if (!ata_log_supported(dev
, ATA_LOG_NCQ_NON_DATA
)) {
2138 "NCQ Send/Recv Log not supported\n");
2141 err_mask
= ata_read_log_page(dev
, ATA_LOG_NCQ_NON_DATA
,
2142 0, ap
->sector_buf
, 1);
2144 u8
*cmds
= dev
->ncq_non_data_cmds
;
2146 memcpy(cmds
, ap
->sector_buf
, ATA_LOG_NCQ_NON_DATA_SIZE
);
2150 static void ata_dev_config_ncq_prio(struct ata_device
*dev
)
2152 struct ata_port
*ap
= dev
->link
->ap
;
2153 unsigned int err_mask
;
2155 if (!ata_identify_page_supported(dev
, ATA_LOG_SATA_SETTINGS
))
2158 err_mask
= ata_read_log_page(dev
,
2159 ATA_LOG_IDENTIFY_DEVICE
,
2160 ATA_LOG_SATA_SETTINGS
,
2166 if (!(ap
->sector_buf
[ATA_LOG_NCQ_PRIO_OFFSET
] & BIT(3)))
2169 dev
->flags
|= ATA_DFLAG_NCQ_PRIO
;
2174 dev
->flags
&= ~ATA_DFLAG_NCQ_PRIO_ENABLE
;
2175 dev
->flags
&= ~ATA_DFLAG_NCQ_PRIO
;
2178 static bool ata_dev_check_adapter(struct ata_device
*dev
,
2179 unsigned short vendor_id
)
2181 struct pci_dev
*pcidev
= NULL
;
2182 struct device
*parent_dev
= NULL
;
2184 for (parent_dev
= dev
->tdev
.parent
; parent_dev
!= NULL
;
2185 parent_dev
= parent_dev
->parent
) {
2186 if (dev_is_pci(parent_dev
)) {
2187 pcidev
= to_pci_dev(parent_dev
);
2188 if (pcidev
->vendor
== vendor_id
)
2197 static int ata_dev_config_ncq(struct ata_device
*dev
,
2198 char *desc
, size_t desc_sz
)
2200 struct ata_port
*ap
= dev
->link
->ap
;
2201 int hdepth
= 0, ddepth
= ata_id_queue_depth(dev
->id
);
2202 unsigned int err_mask
;
2205 if (!ata_id_has_ncq(dev
->id
)) {
2209 if (!IS_ENABLED(CONFIG_SATA_HOST
))
2211 if (dev
->horkage
& ATA_HORKAGE_NONCQ
) {
2212 snprintf(desc
, desc_sz
, "NCQ (not used)");
2216 if (dev
->horkage
& ATA_HORKAGE_NO_NCQ_ON_ATI
&&
2217 ata_dev_check_adapter(dev
, PCI_VENDOR_ID_ATI
)) {
2218 snprintf(desc
, desc_sz
, "NCQ (not used)");
2222 if (ap
->flags
& ATA_FLAG_NCQ
) {
2223 hdepth
= min(ap
->scsi_host
->can_queue
, ATA_MAX_QUEUE
);
2224 dev
->flags
|= ATA_DFLAG_NCQ
;
2227 if (!(dev
->horkage
& ATA_HORKAGE_BROKEN_FPDMA_AA
) &&
2228 (ap
->flags
& ATA_FLAG_FPDMA_AA
) &&
2229 ata_id_has_fpdma_aa(dev
->id
)) {
2230 err_mask
= ata_dev_set_feature(dev
, SETFEATURES_SATA_ENABLE
,
2234 "failed to enable AA (error_mask=0x%x)\n",
2236 if (err_mask
!= AC_ERR_DEV
) {
2237 dev
->horkage
|= ATA_HORKAGE_BROKEN_FPDMA_AA
;
2244 if (hdepth
>= ddepth
)
2245 snprintf(desc
, desc_sz
, "NCQ (depth %d)%s", ddepth
, aa_desc
);
2247 snprintf(desc
, desc_sz
, "NCQ (depth %d/%d)%s", hdepth
,
2250 if ((ap
->flags
& ATA_FLAG_FPDMA_AUX
)) {
2251 if (ata_id_has_ncq_send_and_recv(dev
->id
))
2252 ata_dev_config_ncq_send_recv(dev
);
2253 if (ata_id_has_ncq_non_data(dev
->id
))
2254 ata_dev_config_ncq_non_data(dev
);
2255 if (ata_id_has_ncq_prio(dev
->id
))
2256 ata_dev_config_ncq_prio(dev
);
2262 static void ata_dev_config_sense_reporting(struct ata_device
*dev
)
2264 unsigned int err_mask
;
2266 if (!ata_id_has_sense_reporting(dev
->id
))
2269 if (ata_id_sense_reporting_enabled(dev
->id
))
2272 err_mask
= ata_dev_set_feature(dev
, SETFEATURE_SENSE_DATA
, 0x1);
2275 "failed to enable Sense Data Reporting, Emask 0x%x\n",
2280 static void ata_dev_config_zac(struct ata_device
*dev
)
2282 struct ata_port
*ap
= dev
->link
->ap
;
2283 unsigned int err_mask
;
2284 u8
*identify_buf
= ap
->sector_buf
;
2286 dev
->zac_zones_optimal_open
= U32_MAX
;
2287 dev
->zac_zones_optimal_nonseq
= U32_MAX
;
2288 dev
->zac_zones_max_open
= U32_MAX
;
2291 * Always set the 'ZAC' flag for Host-managed devices.
2293 if (dev
->class == ATA_DEV_ZAC
)
2294 dev
->flags
|= ATA_DFLAG_ZAC
;
2295 else if (ata_id_zoned_cap(dev
->id
) == 0x01)
2297 * Check for host-aware devices.
2299 dev
->flags
|= ATA_DFLAG_ZAC
;
2301 if (!(dev
->flags
& ATA_DFLAG_ZAC
))
2304 if (!ata_identify_page_supported(dev
, ATA_LOG_ZONED_INFORMATION
)) {
2306 "ATA Zoned Information Log not supported\n");
2311 * Read IDENTIFY DEVICE data log, page 9 (Zoned-device information)
2313 err_mask
= ata_read_log_page(dev
, ATA_LOG_IDENTIFY_DEVICE
,
2314 ATA_LOG_ZONED_INFORMATION
,
2317 u64 zoned_cap
, opt_open
, opt_nonseq
, max_open
;
2319 zoned_cap
= get_unaligned_le64(&identify_buf
[8]);
2320 if ((zoned_cap
>> 63))
2321 dev
->zac_zoned_cap
= (zoned_cap
& 1);
2322 opt_open
= get_unaligned_le64(&identify_buf
[24]);
2323 if ((opt_open
>> 63))
2324 dev
->zac_zones_optimal_open
= (u32
)opt_open
;
2325 opt_nonseq
= get_unaligned_le64(&identify_buf
[32]);
2326 if ((opt_nonseq
>> 63))
2327 dev
->zac_zones_optimal_nonseq
= (u32
)opt_nonseq
;
2328 max_open
= get_unaligned_le64(&identify_buf
[40]);
2329 if ((max_open
>> 63))
2330 dev
->zac_zones_max_open
= (u32
)max_open
;
2334 static void ata_dev_config_trusted(struct ata_device
*dev
)
2336 struct ata_port
*ap
= dev
->link
->ap
;
2340 if (!ata_id_has_trusted(dev
->id
))
2343 if (!ata_identify_page_supported(dev
, ATA_LOG_SECURITY
)) {
2345 "Security Log not supported\n");
2349 err
= ata_read_log_page(dev
, ATA_LOG_IDENTIFY_DEVICE
, ATA_LOG_SECURITY
,
2354 trusted_cap
= get_unaligned_le64(&ap
->sector_buf
[40]);
2355 if (!(trusted_cap
& (1ULL << 63))) {
2357 "Trusted Computing capability qword not valid!\n");
2361 if (trusted_cap
& (1 << 0))
2362 dev
->flags
|= ATA_DFLAG_TRUSTED
;
2365 static int ata_dev_config_lba(struct ata_device
*dev
)
2367 const u16
*id
= dev
->id
;
2368 const char *lba_desc
;
2372 dev
->flags
|= ATA_DFLAG_LBA
;
2374 if (ata_id_has_lba48(id
)) {
2376 dev
->flags
|= ATA_DFLAG_LBA48
;
2377 if (dev
->n_sectors
>= (1UL << 28) &&
2378 ata_id_has_flush_ext(id
))
2379 dev
->flags
|= ATA_DFLAG_FLUSH_EXT
;
2385 ret
= ata_dev_config_ncq(dev
, ncq_desc
, sizeof(ncq_desc
));
2387 /* print device info to dmesg */
2388 if (ata_dev_print_info(dev
))
2390 "%llu sectors, multi %u: %s %s\n",
2391 (unsigned long long)dev
->n_sectors
,
2392 dev
->multi_count
, lba_desc
, ncq_desc
);
2397 static void ata_dev_config_chs(struct ata_device
*dev
)
2399 const u16
*id
= dev
->id
;
2401 if (ata_id_current_chs_valid(id
)) {
2402 /* Current CHS translation is valid. */
2403 dev
->cylinders
= id
[54];
2404 dev
->heads
= id
[55];
2405 dev
->sectors
= id
[56];
2407 /* Default translation */
2408 dev
->cylinders
= id
[1];
2410 dev
->sectors
= id
[6];
2413 /* print device info to dmesg */
2414 if (ata_dev_print_info(dev
))
2416 "%llu sectors, multi %u, CHS %u/%u/%u\n",
2417 (unsigned long long)dev
->n_sectors
,
2418 dev
->multi_count
, dev
->cylinders
,
2419 dev
->heads
, dev
->sectors
);
2422 static void ata_dev_config_devslp(struct ata_device
*dev
)
2424 u8
*sata_setting
= dev
->link
->ap
->sector_buf
;
2425 unsigned int err_mask
;
2429 * Check device sleep capability. Get DevSlp timing variables
2430 * from SATA Settings page of Identify Device Data Log.
2432 if (!ata_id_has_devslp(dev
->id
) ||
2433 !ata_identify_page_supported(dev
, ATA_LOG_SATA_SETTINGS
))
2436 err_mask
= ata_read_log_page(dev
,
2437 ATA_LOG_IDENTIFY_DEVICE
,
2438 ATA_LOG_SATA_SETTINGS
,
2443 dev
->flags
|= ATA_DFLAG_DEVSLP
;
2444 for (i
= 0; i
< ATA_LOG_DEVSLP_SIZE
; i
++) {
2445 j
= ATA_LOG_DEVSLP_OFFSET
+ i
;
2446 dev
->devslp_timing
[i
] = sata_setting
[j
];
2450 static void ata_dev_config_cpr(struct ata_device
*dev
)
2452 unsigned int err_mask
;
2455 struct ata_cpr_log
*cpr_log
= NULL
;
2456 u8
*desc
, *buf
= NULL
;
2458 if (ata_id_major_version(dev
->id
) < 11)
2461 buf_len
= ata_log_supported(dev
, ATA_LOG_CONCURRENT_POSITIONING_RANGES
);
2466 * Read the concurrent positioning ranges log (0x47). We can have at
2467 * most 255 32B range descriptors plus a 64B header. This log varies in
2468 * size, so use the size reported in the GPL directory. Reading beyond
2469 * the supported length will result in an error.
2472 buf
= kzalloc(buf_len
, GFP_KERNEL
);
2476 err_mask
= ata_read_log_page(dev
, ATA_LOG_CONCURRENT_POSITIONING_RANGES
,
2477 0, buf
, buf_len
>> 9);
2485 cpr_log
= kzalloc(struct_size(cpr_log
, cpr
, nr_cpr
), GFP_KERNEL
);
2489 cpr_log
->nr_cpr
= nr_cpr
;
2491 for (i
= 0; i
< nr_cpr
; i
++, desc
+= 32) {
2492 cpr_log
->cpr
[i
].num
= desc
[0];
2493 cpr_log
->cpr
[i
].num_storage_elements
= desc
[1];
2494 cpr_log
->cpr
[i
].start_lba
= get_unaligned_le64(&desc
[8]);
2495 cpr_log
->cpr
[i
].num_lbas
= get_unaligned_le64(&desc
[16]);
2499 swap(dev
->cpr_log
, cpr_log
);
2504 static void ata_dev_print_features(struct ata_device
*dev
)
2506 if (!(dev
->flags
& ATA_DFLAG_FEATURES_MASK
))
2510 "Features:%s%s%s%s%s%s\n",
2511 dev
->flags
& ATA_DFLAG_TRUSTED
? " Trust" : "",
2512 dev
->flags
& ATA_DFLAG_DA
? " Dev-Attention" : "",
2513 dev
->flags
& ATA_DFLAG_DEVSLP
? " Dev-Sleep" : "",
2514 dev
->flags
& ATA_DFLAG_NCQ_SEND_RECV
? " NCQ-sndrcv" : "",
2515 dev
->flags
& ATA_DFLAG_NCQ_PRIO
? " NCQ-prio" : "",
2516 dev
->cpr_log
? " CPR" : "");
2520 * ata_dev_configure - Configure the specified ATA/ATAPI device
2521 * @dev: Target device to configure
2523 * Configure @dev according to @dev->id. Generic and low-level
2524 * driver specific fixups are also applied.
2527 * Kernel thread context (may sleep)
2530 * 0 on success, -errno otherwise
2532 int ata_dev_configure(struct ata_device
*dev
)
2534 struct ata_port
*ap
= dev
->link
->ap
;
2535 bool print_info
= ata_dev_print_info(dev
);
2536 const u16
*id
= dev
->id
;
2537 unsigned int xfer_mask
;
2538 unsigned int err_mask
;
2539 char revbuf
[7]; /* XYZ-99\0 */
2540 char fwrevbuf
[ATA_ID_FW_REV_LEN
+1];
2541 char modelbuf
[ATA_ID_PROD_LEN
+1];
2544 if (!ata_dev_enabled(dev
)) {
2545 ata_dev_dbg(dev
, "no device\n");
2550 dev
->horkage
|= ata_dev_blacklisted(dev
);
2551 ata_force_horkage(dev
);
2553 if (dev
->horkage
& ATA_HORKAGE_DISABLE
) {
2554 ata_dev_info(dev
, "unsupported device, disabling\n");
2555 ata_dev_disable(dev
);
2559 if ((!atapi_enabled
|| (ap
->flags
& ATA_FLAG_NO_ATAPI
)) &&
2560 dev
->class == ATA_DEV_ATAPI
) {
2561 ata_dev_warn(dev
, "WARNING: ATAPI is %s, device ignored\n",
2562 atapi_enabled
? "not supported with this driver"
2564 ata_dev_disable(dev
);
2568 rc
= ata_do_link_spd_horkage(dev
);
2572 /* some WD SATA-1 drives have issues with LPM, turn on NOLPM for them */
2573 if ((dev
->horkage
& ATA_HORKAGE_WD_BROKEN_LPM
) &&
2574 (id
[ATA_ID_SATA_CAPABILITY
] & 0xe) == 0x2)
2575 dev
->horkage
|= ATA_HORKAGE_NOLPM
;
2577 if (ap
->flags
& ATA_FLAG_NO_LPM
)
2578 dev
->horkage
|= ATA_HORKAGE_NOLPM
;
2580 if (dev
->horkage
& ATA_HORKAGE_NOLPM
) {
2581 ata_dev_warn(dev
, "LPM support broken, forcing max_power\n");
2582 dev
->link
->ap
->target_lpm_policy
= ATA_LPM_MAX_POWER
;
2585 /* let ACPI work its magic */
2586 rc
= ata_acpi_on_devcfg(dev
);
2590 /* massage HPA, do it early as it might change IDENTIFY data */
2591 rc
= ata_hpa_resize(dev
);
2595 /* print device capabilities */
2597 "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x "
2598 "85:%04x 86:%04x 87:%04x 88:%04x\n",
2600 id
[49], id
[82], id
[83], id
[84],
2601 id
[85], id
[86], id
[87], id
[88]);
2603 /* initialize to-be-configured parameters */
2604 dev
->flags
&= ~ATA_DFLAG_CFG_MASK
;
2605 dev
->max_sectors
= 0;
2611 dev
->multi_count
= 0;
2614 * common ATA, ATAPI feature tests
2617 /* find max transfer mode; for printk only */
2618 xfer_mask
= ata_id_xfermask(id
);
2620 ata_dump_id(dev
, id
);
2622 /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */
2623 ata_id_c_string(dev
->id
, fwrevbuf
, ATA_ID_FW_REV
,
2626 ata_id_c_string(dev
->id
, modelbuf
, ATA_ID_PROD
,
2629 /* ATA-specific feature tests */
2630 if (dev
->class == ATA_DEV_ATA
|| dev
->class == ATA_DEV_ZAC
) {
2631 if (ata_id_is_cfa(id
)) {
2632 /* CPRM may make this media unusable */
2633 if (id
[ATA_ID_CFA_KEY_MGMT
] & 1)
2635 "supports DRM functions and may not be fully accessible\n");
2636 snprintf(revbuf
, 7, "CFA");
2638 snprintf(revbuf
, 7, "ATA-%d", ata_id_major_version(id
));
2639 /* Warn the user if the device has TPM extensions */
2640 if (ata_id_has_tpm(id
))
2642 "supports DRM functions and may not be fully accessible\n");
2645 dev
->n_sectors
= ata_id_n_sectors(id
);
2647 /* get current R/W Multiple count setting */
2648 if ((dev
->id
[47] >> 8) == 0x80 && (dev
->id
[59] & 0x100)) {
2649 unsigned int max
= dev
->id
[47] & 0xff;
2650 unsigned int cnt
= dev
->id
[59] & 0xff;
2651 /* only recognize/allow powers of two here */
2652 if (is_power_of_2(max
) && is_power_of_2(cnt
))
2654 dev
->multi_count
= cnt
;
2657 /* print device info to dmesg */
2659 ata_dev_info(dev
, "%s: %s, %s, max %s\n",
2660 revbuf
, modelbuf
, fwrevbuf
,
2661 ata_mode_string(xfer_mask
));
2663 if (ata_id_has_lba(id
)) {
2664 rc
= ata_dev_config_lba(dev
);
2668 ata_dev_config_chs(dev
);
2671 ata_dev_config_devslp(dev
);
2672 ata_dev_config_sense_reporting(dev
);
2673 ata_dev_config_zac(dev
);
2674 ata_dev_config_trusted(dev
);
2675 ata_dev_config_cpr(dev
);
2679 ata_dev_print_features(dev
);
2682 /* ATAPI-specific feature tests */
2683 else if (dev
->class == ATA_DEV_ATAPI
) {
2684 const char *cdb_intr_string
= "";
2685 const char *atapi_an_string
= "";
2686 const char *dma_dir_string
= "";
2689 rc
= atapi_cdb_len(id
);
2690 if ((rc
< 12) || (rc
> ATAPI_CDB_LEN
)) {
2691 ata_dev_warn(dev
, "unsupported CDB len %d\n", rc
);
2695 dev
->cdb_len
= (unsigned int) rc
;
2697 /* Enable ATAPI AN if both the host and device have
2698 * the support. If PMP is attached, SNTF is required
2699 * to enable ATAPI AN to discern between PHY status
2700 * changed notifications and ATAPI ANs.
2703 (ap
->flags
& ATA_FLAG_AN
) && ata_id_has_atapi_AN(id
) &&
2704 (!sata_pmp_attached(ap
) ||
2705 sata_scr_read(&ap
->link
, SCR_NOTIFICATION
, &sntf
) == 0)) {
2706 /* issue SET feature command to turn this on */
2707 err_mask
= ata_dev_set_feature(dev
,
2708 SETFEATURES_SATA_ENABLE
, SATA_AN
);
2711 "failed to enable ATAPI AN (err_mask=0x%x)\n",
2714 dev
->flags
|= ATA_DFLAG_AN
;
2715 atapi_an_string
= ", ATAPI AN";
2719 if (ata_id_cdb_intr(dev
->id
)) {
2720 dev
->flags
|= ATA_DFLAG_CDB_INTR
;
2721 cdb_intr_string
= ", CDB intr";
2724 if (atapi_dmadir
|| (dev
->horkage
& ATA_HORKAGE_ATAPI_DMADIR
) || atapi_id_dmadir(dev
->id
)) {
2725 dev
->flags
|= ATA_DFLAG_DMADIR
;
2726 dma_dir_string
= ", DMADIR";
2729 if (ata_id_has_da(dev
->id
)) {
2730 dev
->flags
|= ATA_DFLAG_DA
;
2734 /* print device info to dmesg */
2737 "ATAPI: %s, %s, max %s%s%s%s\n",
2739 ata_mode_string(xfer_mask
),
2740 cdb_intr_string
, atapi_an_string
,
2744 /* determine max_sectors */
2745 dev
->max_sectors
= ATA_MAX_SECTORS
;
2746 if (dev
->flags
& ATA_DFLAG_LBA48
)
2747 dev
->max_sectors
= ATA_MAX_SECTORS_LBA48
;
2749 /* Limit PATA drive on SATA cable bridge transfers to udma5,
2751 if (ata_dev_knobble(dev
)) {
2753 ata_dev_info(dev
, "applying bridge limits\n");
2754 dev
->udma_mask
&= ATA_UDMA5
;
2755 dev
->max_sectors
= ATA_MAX_SECTORS
;
2758 if ((dev
->class == ATA_DEV_ATAPI
) &&
2759 (atapi_command_packet_set(id
) == TYPE_TAPE
)) {
2760 dev
->max_sectors
= ATA_MAX_SECTORS_TAPE
;
2761 dev
->horkage
|= ATA_HORKAGE_STUCK_ERR
;
2764 if (dev
->horkage
& ATA_HORKAGE_MAX_SEC_128
)
2765 dev
->max_sectors
= min_t(unsigned int, ATA_MAX_SECTORS_128
,
2768 if (dev
->horkage
& ATA_HORKAGE_MAX_SEC_1024
)
2769 dev
->max_sectors
= min_t(unsigned int, ATA_MAX_SECTORS_1024
,
2772 if (dev
->horkage
& ATA_HORKAGE_MAX_SEC_LBA48
)
2773 dev
->max_sectors
= ATA_MAX_SECTORS_LBA48
;
2775 if (ap
->ops
->dev_config
)
2776 ap
->ops
->dev_config(dev
);
2778 if (dev
->horkage
& ATA_HORKAGE_DIAGNOSTIC
) {
2779 /* Let the user know. We don't want to disallow opens for
2780 rescue purposes, or in case the vendor is just a blithering
2781 idiot. Do this after the dev_config call as some controllers
2782 with buggy firmware may want to avoid reporting false device
2787 "Drive reports diagnostics failure. This may indicate a drive\n");
2789 "fault or invalid emulation. Contact drive vendor for information.\n");
2793 if ((dev
->horkage
& ATA_HORKAGE_FIRMWARE_WARN
) && print_info
) {
2794 ata_dev_warn(dev
, "WARNING: device requires firmware update to be fully functional\n");
2795 ata_dev_warn(dev
, " contact the vendor or visit http://ata.wiki.kernel.org\n");
2805 * ata_cable_40wire - return 40 wire cable type
2808 * Helper method for drivers which want to hardwire 40 wire cable
2812 int ata_cable_40wire(struct ata_port
*ap
)
2814 return ATA_CBL_PATA40
;
2816 EXPORT_SYMBOL_GPL(ata_cable_40wire
);
2819 * ata_cable_80wire - return 80 wire cable type
2822 * Helper method for drivers which want to hardwire 80 wire cable
2826 int ata_cable_80wire(struct ata_port
*ap
)
2828 return ATA_CBL_PATA80
;
2830 EXPORT_SYMBOL_GPL(ata_cable_80wire
);
2833 * ata_cable_unknown - return unknown PATA cable.
2836 * Helper method for drivers which have no PATA cable detection.
2839 int ata_cable_unknown(struct ata_port
*ap
)
2841 return ATA_CBL_PATA_UNK
;
2843 EXPORT_SYMBOL_GPL(ata_cable_unknown
);
2846 * ata_cable_ignore - return ignored PATA cable.
2849 * Helper method for drivers which don't use cable type to limit
2852 int ata_cable_ignore(struct ata_port
*ap
)
2854 return ATA_CBL_PATA_IGN
;
2856 EXPORT_SYMBOL_GPL(ata_cable_ignore
);
2859 * ata_cable_sata - return SATA cable type
2862 * Helper method for drivers which have SATA cables
2865 int ata_cable_sata(struct ata_port
*ap
)
2867 return ATA_CBL_SATA
;
2869 EXPORT_SYMBOL_GPL(ata_cable_sata
);
2872 * ata_bus_probe - Reset and probe ATA bus
2875 * Master ATA bus probing function. Initiates a hardware-dependent
2876 * bus reset, then attempts to identify any devices found on
2880 * PCI/etc. bus probe sem.
2883 * Zero on success, negative errno otherwise.
2886 int ata_bus_probe(struct ata_port
*ap
)
2888 unsigned int classes
[ATA_MAX_DEVICES
];
2889 int tries
[ATA_MAX_DEVICES
];
2891 struct ata_device
*dev
;
2893 ata_for_each_dev(dev
, &ap
->link
, ALL
)
2894 tries
[dev
->devno
] = ATA_PROBE_MAX_TRIES
;
2897 ata_for_each_dev(dev
, &ap
->link
, ALL
) {
2898 /* If we issue an SRST then an ATA drive (not ATAPI)
2899 * may change configuration and be in PIO0 timing. If
2900 * we do a hard reset (or are coming from power on)
2901 * this is true for ATA or ATAPI. Until we've set a
2902 * suitable controller mode we should not touch the
2903 * bus as we may be talking too fast.
2905 dev
->pio_mode
= XFER_PIO_0
;
2906 dev
->dma_mode
= 0xff;
2908 /* If the controller has a pio mode setup function
2909 * then use it to set the chipset to rights. Don't
2910 * touch the DMA setup as that will be dealt with when
2911 * configuring devices.
2913 if (ap
->ops
->set_piomode
)
2914 ap
->ops
->set_piomode(ap
, dev
);
2917 /* reset and determine device classes */
2918 ap
->ops
->phy_reset(ap
);
2920 ata_for_each_dev(dev
, &ap
->link
, ALL
) {
2921 if (dev
->class != ATA_DEV_UNKNOWN
)
2922 classes
[dev
->devno
] = dev
->class;
2924 classes
[dev
->devno
] = ATA_DEV_NONE
;
2926 dev
->class = ATA_DEV_UNKNOWN
;
2929 /* read IDENTIFY page and configure devices. We have to do the identify
2930 specific sequence bass-ackwards so that PDIAG- is released by
2933 ata_for_each_dev(dev
, &ap
->link
, ALL_REVERSE
) {
2934 if (tries
[dev
->devno
])
2935 dev
->class = classes
[dev
->devno
];
2937 if (!ata_dev_enabled(dev
))
2940 rc
= ata_dev_read_id(dev
, &dev
->class, ATA_READID_POSTRESET
,
2946 /* Now ask for the cable type as PDIAG- should have been released */
2947 if (ap
->ops
->cable_detect
)
2948 ap
->cbl
= ap
->ops
->cable_detect(ap
);
2950 /* We may have SATA bridge glue hiding here irrespective of
2951 * the reported cable types and sensed types. When SATA
2952 * drives indicate we have a bridge, we don't know which end
2953 * of the link the bridge is which is a problem.
2955 ata_for_each_dev(dev
, &ap
->link
, ENABLED
)
2956 if (ata_id_is_sata(dev
->id
))
2957 ap
->cbl
= ATA_CBL_SATA
;
2959 /* After the identify sequence we can now set up the devices. We do
2960 this in the normal order so that the user doesn't get confused */
2962 ata_for_each_dev(dev
, &ap
->link
, ENABLED
) {
2963 ap
->link
.eh_context
.i
.flags
|= ATA_EHI_PRINTINFO
;
2964 rc
= ata_dev_configure(dev
);
2965 ap
->link
.eh_context
.i
.flags
&= ~ATA_EHI_PRINTINFO
;
2970 /* configure transfer mode */
2971 rc
= ata_set_mode(&ap
->link
, &dev
);
2975 ata_for_each_dev(dev
, &ap
->link
, ENABLED
)
2981 tries
[dev
->devno
]--;
2985 /* eeek, something went very wrong, give up */
2986 tries
[dev
->devno
] = 0;
2990 /* give it just one more chance */
2991 tries
[dev
->devno
] = min(tries
[dev
->devno
], 1);
2994 if (tries
[dev
->devno
] == 1) {
2995 /* This is the last chance, better to slow
2996 * down than lose it.
2998 sata_down_spd_limit(&ap
->link
, 0);
2999 ata_down_xfermask_limit(dev
, ATA_DNXFER_PIO
);
3003 if (!tries
[dev
->devno
])
3004 ata_dev_disable(dev
);
3010 * sata_print_link_status - Print SATA link status
3011 * @link: SATA link to printk link status about
3013 * This function prints link speed and status of a SATA link.
3018 static void sata_print_link_status(struct ata_link
*link
)
3020 u32 sstatus
, scontrol
, tmp
;
3022 if (sata_scr_read(link
, SCR_STATUS
, &sstatus
))
3024 sata_scr_read(link
, SCR_CONTROL
, &scontrol
);
3026 if (ata_phys_link_online(link
)) {
3027 tmp
= (sstatus
>> 4) & 0xf;
3028 ata_link_info(link
, "SATA link up %s (SStatus %X SControl %X)\n",
3029 sata_spd_string(tmp
), sstatus
, scontrol
);
3031 ata_link_info(link
, "SATA link down (SStatus %X SControl %X)\n",
3037 * ata_dev_pair - return other device on cable
3040 * Obtain the other device on the same cable, or if none is
3041 * present NULL is returned
3044 struct ata_device
*ata_dev_pair(struct ata_device
*adev
)
3046 struct ata_link
*link
= adev
->link
;
3047 struct ata_device
*pair
= &link
->device
[1 - adev
->devno
];
3048 if (!ata_dev_enabled(pair
))
3052 EXPORT_SYMBOL_GPL(ata_dev_pair
);
3055 * sata_down_spd_limit - adjust SATA spd limit downward
3056 * @link: Link to adjust SATA spd limit for
3057 * @spd_limit: Additional limit
3059 * Adjust SATA spd limit of @link downward. Note that this
3060 * function only adjusts the limit. The change must be applied
3061 * using sata_set_spd().
3063 * If @spd_limit is non-zero, the speed is limited to equal to or
3064 * lower than @spd_limit if such speed is supported. If
3065 * @spd_limit is slower than any supported speed, only the lowest
3066 * supported speed is allowed.
3069 * Inherited from caller.
3072 * 0 on success, negative errno on failure
3074 int sata_down_spd_limit(struct ata_link
*link
, u32 spd_limit
)
3076 u32 sstatus
, spd
, mask
;
3079 if (!sata_scr_valid(link
))
3082 /* If SCR can be read, use it to determine the current SPD.
3083 * If not, use cached value in link->sata_spd.
3085 rc
= sata_scr_read(link
, SCR_STATUS
, &sstatus
);
3086 if (rc
== 0 && ata_sstatus_online(sstatus
))
3087 spd
= (sstatus
>> 4) & 0xf;
3089 spd
= link
->sata_spd
;
3091 mask
= link
->sata_spd_limit
;
3095 /* unconditionally mask off the highest bit */
3096 bit
= fls(mask
) - 1;
3097 mask
&= ~(1 << bit
);
3100 * Mask off all speeds higher than or equal to the current one. At
3101 * this point, if current SPD is not available and we previously
3102 * recorded the link speed from SStatus, the driver has already
3103 * masked off the highest bit so mask should already be 1 or 0.
3104 * Otherwise, we should not force 1.5Gbps on a link where we have
3105 * not previously recorded speed from SStatus. Just return in this
3109 mask
&= (1 << (spd
- 1)) - 1;
3113 /* were we already at the bottom? */
3118 if (mask
& ((1 << spd_limit
) - 1))
3119 mask
&= (1 << spd_limit
) - 1;
3121 bit
= ffs(mask
) - 1;
3126 link
->sata_spd_limit
= mask
;
3128 ata_link_warn(link
, "limiting SATA link speed to %s\n",
3129 sata_spd_string(fls(mask
)));
3134 #ifdef CONFIG_ATA_ACPI
3136 * ata_timing_cycle2mode - find xfer mode for the specified cycle duration
3137 * @xfer_shift: ATA_SHIFT_* value for transfer type to examine.
3138 * @cycle: cycle duration in ns
3140 * Return matching xfer mode for @cycle. The returned mode is of
3141 * the transfer type specified by @xfer_shift. If @cycle is too
3142 * slow for @xfer_shift, 0xff is returned. If @cycle is faster
3143 * than the fastest known mode, the fasted mode is returned.
3149 * Matching xfer_mode, 0xff if no match found.
3151 u8
ata_timing_cycle2mode(unsigned int xfer_shift
, int cycle
)
3153 u8 base_mode
= 0xff, last_mode
= 0xff;
3154 const struct ata_xfer_ent
*ent
;
3155 const struct ata_timing
*t
;
3157 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
3158 if (ent
->shift
== xfer_shift
)
3159 base_mode
= ent
->base
;
3161 for (t
= ata_timing_find_mode(base_mode
);
3162 t
&& ata_xfer_mode2shift(t
->mode
) == xfer_shift
; t
++) {
3163 unsigned short this_cycle
;
3165 switch (xfer_shift
) {
3167 case ATA_SHIFT_MWDMA
:
3168 this_cycle
= t
->cycle
;
3170 case ATA_SHIFT_UDMA
:
3171 this_cycle
= t
->udma
;
3177 if (cycle
> this_cycle
)
3180 last_mode
= t
->mode
;
3188 * ata_down_xfermask_limit - adjust dev xfer masks downward
3189 * @dev: Device to adjust xfer masks
3190 * @sel: ATA_DNXFER_* selector
3192 * Adjust xfer masks of @dev downward. Note that this function
3193 * does not apply the change. Invoking ata_set_mode() afterwards
3194 * will apply the limit.
3197 * Inherited from caller.
3200 * 0 on success, negative errno on failure
3202 int ata_down_xfermask_limit(struct ata_device
*dev
, unsigned int sel
)
3205 unsigned int orig_mask
, xfer_mask
;
3206 unsigned int pio_mask
, mwdma_mask
, udma_mask
;
3209 quiet
= !!(sel
& ATA_DNXFER_QUIET
);
3210 sel
&= ~ATA_DNXFER_QUIET
;
3212 xfer_mask
= orig_mask
= ata_pack_xfermask(dev
->pio_mask
,
3215 ata_unpack_xfermask(xfer_mask
, &pio_mask
, &mwdma_mask
, &udma_mask
);
3218 case ATA_DNXFER_PIO
:
3219 highbit
= fls(pio_mask
) - 1;
3220 pio_mask
&= ~(1 << highbit
);
3223 case ATA_DNXFER_DMA
:
3225 highbit
= fls(udma_mask
) - 1;
3226 udma_mask
&= ~(1 << highbit
);
3229 } else if (mwdma_mask
) {
3230 highbit
= fls(mwdma_mask
) - 1;
3231 mwdma_mask
&= ~(1 << highbit
);
3237 case ATA_DNXFER_40C
:
3238 udma_mask
&= ATA_UDMA_MASK_40C
;
3241 case ATA_DNXFER_FORCE_PIO0
:
3244 case ATA_DNXFER_FORCE_PIO
:
3253 xfer_mask
&= ata_pack_xfermask(pio_mask
, mwdma_mask
, udma_mask
);
3255 if (!(xfer_mask
& ATA_MASK_PIO
) || xfer_mask
== orig_mask
)
3259 if (xfer_mask
& (ATA_MASK_MWDMA
| ATA_MASK_UDMA
))
3260 snprintf(buf
, sizeof(buf
), "%s:%s",
3261 ata_mode_string(xfer_mask
),
3262 ata_mode_string(xfer_mask
& ATA_MASK_PIO
));
3264 snprintf(buf
, sizeof(buf
), "%s",
3265 ata_mode_string(xfer_mask
));
3267 ata_dev_warn(dev
, "limiting speed to %s\n", buf
);
3270 ata_unpack_xfermask(xfer_mask
, &dev
->pio_mask
, &dev
->mwdma_mask
,
3276 static int ata_dev_set_mode(struct ata_device
*dev
)
3278 struct ata_port
*ap
= dev
->link
->ap
;
3279 struct ata_eh_context
*ehc
= &dev
->link
->eh_context
;
3280 const bool nosetxfer
= dev
->horkage
& ATA_HORKAGE_NOSETXFER
;
3281 const char *dev_err_whine
= "";
3282 int ign_dev_err
= 0;
3283 unsigned int err_mask
= 0;
3286 dev
->flags
&= ~ATA_DFLAG_PIO
;
3287 if (dev
->xfer_shift
== ATA_SHIFT_PIO
)
3288 dev
->flags
|= ATA_DFLAG_PIO
;
3290 if (nosetxfer
&& ap
->flags
& ATA_FLAG_SATA
&& ata_id_is_sata(dev
->id
))
3291 dev_err_whine
= " (SET_XFERMODE skipped)";
3295 "NOSETXFER but PATA detected - can't "
3296 "skip SETXFER, might malfunction\n");
3297 err_mask
= ata_dev_set_xfermode(dev
);
3300 if (err_mask
& ~AC_ERR_DEV
)
3304 ehc
->i
.flags
|= ATA_EHI_POST_SETMODE
;
3305 rc
= ata_dev_revalidate(dev
, ATA_DEV_UNKNOWN
, 0);
3306 ehc
->i
.flags
&= ~ATA_EHI_POST_SETMODE
;
3310 if (dev
->xfer_shift
== ATA_SHIFT_PIO
) {
3311 /* Old CFA may refuse this command, which is just fine */
3312 if (ata_id_is_cfa(dev
->id
))
3314 /* Catch several broken garbage emulations plus some pre
3316 if (ata_id_major_version(dev
->id
) == 0 &&
3317 dev
->pio_mode
<= XFER_PIO_2
)
3319 /* Some very old devices and some bad newer ones fail
3320 any kind of SET_XFERMODE request but support PIO0-2
3321 timings and no IORDY */
3322 if (!ata_id_has_iordy(dev
->id
) && dev
->pio_mode
<= XFER_PIO_2
)
3325 /* Early MWDMA devices do DMA but don't allow DMA mode setting.
3326 Don't fail an MWDMA0 set IFF the device indicates it is in MWDMA0 */
3327 if (dev
->xfer_shift
== ATA_SHIFT_MWDMA
&&
3328 dev
->dma_mode
== XFER_MW_DMA_0
&&
3329 (dev
->id
[63] >> 8) & 1)
3332 /* if the device is actually configured correctly, ignore dev err */
3333 if (dev
->xfer_mode
== ata_xfer_mask2mode(ata_id_xfermask(dev
->id
)))
3336 if (err_mask
& AC_ERR_DEV
) {
3340 dev_err_whine
= " (device error ignored)";
3343 ata_dev_dbg(dev
, "xfer_shift=%u, xfer_mode=0x%x\n",
3344 dev
->xfer_shift
, (int)dev
->xfer_mode
);
3346 if (!(ehc
->i
.flags
& ATA_EHI_QUIET
) ||
3347 ehc
->i
.flags
& ATA_EHI_DID_HARDRESET
)
3348 ata_dev_info(dev
, "configured for %s%s\n",
3349 ata_mode_string(ata_xfer_mode2mask(dev
->xfer_mode
)),
3355 ata_dev_err(dev
, "failed to set xfermode (err_mask=0x%x)\n", err_mask
);
3360 * ata_do_set_mode - Program timings and issue SET FEATURES - XFER
3361 * @link: link on which timings will be programmed
3362 * @r_failed_dev: out parameter for failed device
3364 * Standard implementation of the function used to tune and set
3365 * ATA device disk transfer mode (PIO3, UDMA6, etc.). If
3366 * ata_dev_set_mode() fails, pointer to the failing device is
3367 * returned in @r_failed_dev.
3370 * PCI/etc. bus probe sem.
3373 * 0 on success, negative errno otherwise
3376 int ata_do_set_mode(struct ata_link
*link
, struct ata_device
**r_failed_dev
)
3378 struct ata_port
*ap
= link
->ap
;
3379 struct ata_device
*dev
;
3380 int rc
= 0, used_dma
= 0, found
= 0;
3382 /* step 1: calculate xfer_mask */
3383 ata_for_each_dev(dev
, link
, ENABLED
) {
3384 unsigned int pio_mask
, dma_mask
;
3385 unsigned int mode_mask
;
3387 mode_mask
= ATA_DMA_MASK_ATA
;
3388 if (dev
->class == ATA_DEV_ATAPI
)
3389 mode_mask
= ATA_DMA_MASK_ATAPI
;
3390 else if (ata_id_is_cfa(dev
->id
))
3391 mode_mask
= ATA_DMA_MASK_CFA
;
3393 ata_dev_xfermask(dev
);
3394 ata_force_xfermask(dev
);
3396 pio_mask
= ata_pack_xfermask(dev
->pio_mask
, 0, 0);
3398 if (libata_dma_mask
& mode_mask
)
3399 dma_mask
= ata_pack_xfermask(0, dev
->mwdma_mask
,
3404 dev
->pio_mode
= ata_xfer_mask2mode(pio_mask
);
3405 dev
->dma_mode
= ata_xfer_mask2mode(dma_mask
);
3408 if (ata_dma_enabled(dev
))
3414 /* step 2: always set host PIO timings */
3415 ata_for_each_dev(dev
, link
, ENABLED
) {
3416 if (dev
->pio_mode
== 0xff) {
3417 ata_dev_warn(dev
, "no PIO support\n");
3422 dev
->xfer_mode
= dev
->pio_mode
;
3423 dev
->xfer_shift
= ATA_SHIFT_PIO
;
3424 if (ap
->ops
->set_piomode
)
3425 ap
->ops
->set_piomode(ap
, dev
);
3428 /* step 3: set host DMA timings */
3429 ata_for_each_dev(dev
, link
, ENABLED
) {
3430 if (!ata_dma_enabled(dev
))
3433 dev
->xfer_mode
= dev
->dma_mode
;
3434 dev
->xfer_shift
= ata_xfer_mode2shift(dev
->dma_mode
);
3435 if (ap
->ops
->set_dmamode
)
3436 ap
->ops
->set_dmamode(ap
, dev
);
3439 /* step 4: update devices' xfer mode */
3440 ata_for_each_dev(dev
, link
, ENABLED
) {
3441 rc
= ata_dev_set_mode(dev
);
3446 /* Record simplex status. If we selected DMA then the other
3447 * host channels are not permitted to do so.
3449 if (used_dma
&& (ap
->host
->flags
& ATA_HOST_SIMPLEX
))
3450 ap
->host
->simplex_claimed
= ap
;
3454 *r_failed_dev
= dev
;
3457 EXPORT_SYMBOL_GPL(ata_do_set_mode
);
3460 * ata_wait_ready - wait for link to become ready
3461 * @link: link to be waited on
3462 * @deadline: deadline jiffies for the operation
3463 * @check_ready: callback to check link readiness
3465 * Wait for @link to become ready. @check_ready should return
3466 * positive number if @link is ready, 0 if it isn't, -ENODEV if
3467 * link doesn't seem to be occupied, other errno for other error
3470 * Transient -ENODEV conditions are allowed for
3471 * ATA_TMOUT_FF_WAIT.
3477 * 0 if @link is ready before @deadline; otherwise, -errno.
3479 int ata_wait_ready(struct ata_link
*link
, unsigned long deadline
,
3480 int (*check_ready
)(struct ata_link
*link
))
3482 unsigned long start
= jiffies
;
3483 unsigned long nodev_deadline
;
3486 /* choose which 0xff timeout to use, read comment in libata.h */
3487 if (link
->ap
->host
->flags
& ATA_HOST_PARALLEL_SCAN
)
3488 nodev_deadline
= ata_deadline(start
, ATA_TMOUT_FF_WAIT_LONG
);
3490 nodev_deadline
= ata_deadline(start
, ATA_TMOUT_FF_WAIT
);
3492 /* Slave readiness can't be tested separately from master. On
3493 * M/S emulation configuration, this function should be called
3494 * only on the master and it will handle both master and slave.
3496 WARN_ON(link
== link
->ap
->slave_link
);
3498 if (time_after(nodev_deadline
, deadline
))
3499 nodev_deadline
= deadline
;
3502 unsigned long now
= jiffies
;
3505 ready
= tmp
= check_ready(link
);
3510 * -ENODEV could be transient. Ignore -ENODEV if link
3511 * is online. Also, some SATA devices take a long
3512 * time to clear 0xff after reset. Wait for
3513 * ATA_TMOUT_FF_WAIT[_LONG] on -ENODEV if link isn't
3516 * Note that some PATA controllers (pata_ali) explode
3517 * if status register is read more than once when
3518 * there's no device attached.
3520 if (ready
== -ENODEV
) {
3521 if (ata_link_online(link
))
3523 else if ((link
->ap
->flags
& ATA_FLAG_SATA
) &&
3524 !ata_link_offline(link
) &&
3525 time_before(now
, nodev_deadline
))
3531 if (time_after(now
, deadline
))
3534 if (!warned
&& time_after(now
, start
+ 5 * HZ
) &&
3535 (deadline
- now
> 3 * HZ
)) {
3537 "link is slow to respond, please be patient "
3538 "(ready=%d)\n", tmp
);
3542 ata_msleep(link
->ap
, 50);
3547 * ata_wait_after_reset - wait for link to become ready after reset
3548 * @link: link to be waited on
3549 * @deadline: deadline jiffies for the operation
3550 * @check_ready: callback to check link readiness
3552 * Wait for @link to become ready after reset.
3558 * 0 if @link is ready before @deadline; otherwise, -errno.
3560 int ata_wait_after_reset(struct ata_link
*link
, unsigned long deadline
,
3561 int (*check_ready
)(struct ata_link
*link
))
3563 ata_msleep(link
->ap
, ATA_WAIT_AFTER_RESET
);
3565 return ata_wait_ready(link
, deadline
, check_ready
);
3567 EXPORT_SYMBOL_GPL(ata_wait_after_reset
);
3570 * ata_std_prereset - prepare for reset
3571 * @link: ATA link to be reset
3572 * @deadline: deadline jiffies for the operation
3574 * @link is about to be reset. Initialize it. Failure from
3575 * prereset makes libata abort whole reset sequence and give up
3576 * that port, so prereset should be best-effort. It does its
3577 * best to prepare for reset sequence but if things go wrong, it
3578 * should just whine, not fail.
3581 * Kernel thread context (may sleep)
3586 int ata_std_prereset(struct ata_link
*link
, unsigned long deadline
)
3588 struct ata_port
*ap
= link
->ap
;
3589 struct ata_eh_context
*ehc
= &link
->eh_context
;
3590 const unsigned long *timing
= sata_ehc_deb_timing(ehc
);
3593 /* if we're about to do hardreset, nothing more to do */
3594 if (ehc
->i
.action
& ATA_EH_HARDRESET
)
3597 /* if SATA, resume link */
3598 if (ap
->flags
& ATA_FLAG_SATA
) {
3599 rc
= sata_link_resume(link
, timing
, deadline
);
3600 /* whine about phy resume failure but proceed */
3601 if (rc
&& rc
!= -EOPNOTSUPP
)
3603 "failed to resume link for reset (errno=%d)\n",
3607 /* no point in trying softreset on offline link */
3608 if (ata_phys_link_offline(link
))
3609 ehc
->i
.action
&= ~ATA_EH_SOFTRESET
;
3613 EXPORT_SYMBOL_GPL(ata_std_prereset
);
3616 * sata_std_hardreset - COMRESET w/o waiting or classification
3617 * @link: link to reset
3618 * @class: resulting class of attached device
3619 * @deadline: deadline jiffies for the operation
3621 * Standard SATA COMRESET w/o waiting or classification.
3624 * Kernel thread context (may sleep)
3627 * 0 if link offline, -EAGAIN if link online, -errno on errors.
3629 int sata_std_hardreset(struct ata_link
*link
, unsigned int *class,
3630 unsigned long deadline
)
3632 const unsigned long *timing
= sata_ehc_deb_timing(&link
->eh_context
);
3637 rc
= sata_link_hardreset(link
, timing
, deadline
, &online
, NULL
);
3638 return online
? -EAGAIN
: rc
;
3640 EXPORT_SYMBOL_GPL(sata_std_hardreset
);
3643 * ata_std_postreset - standard postreset callback
3644 * @link: the target ata_link
3645 * @classes: classes of attached devices
3647 * This function is invoked after a successful reset. Note that
3648 * the device might have been reset more than once using
3649 * different reset methods before postreset is invoked.
3652 * Kernel thread context (may sleep)
3654 void ata_std_postreset(struct ata_link
*link
, unsigned int *classes
)
3658 /* reset complete, clear SError */
3659 if (!sata_scr_read(link
, SCR_ERROR
, &serror
))
3660 sata_scr_write(link
, SCR_ERROR
, serror
);
3662 /* print link status */
3663 sata_print_link_status(link
);
3665 EXPORT_SYMBOL_GPL(ata_std_postreset
);
3668 * ata_dev_same_device - Determine whether new ID matches configured device
3669 * @dev: device to compare against
3670 * @new_class: class of the new device
3671 * @new_id: IDENTIFY page of the new device
3673 * Compare @new_class and @new_id against @dev and determine
3674 * whether @dev is the device indicated by @new_class and
3681 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
3683 static int ata_dev_same_device(struct ata_device
*dev
, unsigned int new_class
,
3686 const u16
*old_id
= dev
->id
;
3687 unsigned char model
[2][ATA_ID_PROD_LEN
+ 1];
3688 unsigned char serial
[2][ATA_ID_SERNO_LEN
+ 1];
3690 if (dev
->class != new_class
) {
3691 ata_dev_info(dev
, "class mismatch %d != %d\n",
3692 dev
->class, new_class
);
3696 ata_id_c_string(old_id
, model
[0], ATA_ID_PROD
, sizeof(model
[0]));
3697 ata_id_c_string(new_id
, model
[1], ATA_ID_PROD
, sizeof(model
[1]));
3698 ata_id_c_string(old_id
, serial
[0], ATA_ID_SERNO
, sizeof(serial
[0]));
3699 ata_id_c_string(new_id
, serial
[1], ATA_ID_SERNO
, sizeof(serial
[1]));
3701 if (strcmp(model
[0], model
[1])) {
3702 ata_dev_info(dev
, "model number mismatch '%s' != '%s'\n",
3703 model
[0], model
[1]);
3707 if (strcmp(serial
[0], serial
[1])) {
3708 ata_dev_info(dev
, "serial number mismatch '%s' != '%s'\n",
3709 serial
[0], serial
[1]);
3717 * ata_dev_reread_id - Re-read IDENTIFY data
3718 * @dev: target ATA device
3719 * @readid_flags: read ID flags
3721 * Re-read IDENTIFY page and make sure @dev is still attached to
3725 * Kernel thread context (may sleep)
3728 * 0 on success, negative errno otherwise
3730 int ata_dev_reread_id(struct ata_device
*dev
, unsigned int readid_flags
)
3732 unsigned int class = dev
->class;
3733 u16
*id
= (void *)dev
->link
->ap
->sector_buf
;
3737 rc
= ata_dev_read_id(dev
, &class, readid_flags
, id
);
3741 /* is the device still there? */
3742 if (!ata_dev_same_device(dev
, class, id
))
3745 memcpy(dev
->id
, id
, sizeof(id
[0]) * ATA_ID_WORDS
);
3750 * ata_dev_revalidate - Revalidate ATA device
3751 * @dev: device to revalidate
3752 * @new_class: new class code
3753 * @readid_flags: read ID flags
3755 * Re-read IDENTIFY page, make sure @dev is still attached to the
3756 * port and reconfigure it according to the new IDENTIFY page.
3759 * Kernel thread context (may sleep)
3762 * 0 on success, negative errno otherwise
3764 int ata_dev_revalidate(struct ata_device
*dev
, unsigned int new_class
,
3765 unsigned int readid_flags
)
3767 u64 n_sectors
= dev
->n_sectors
;
3768 u64 n_native_sectors
= dev
->n_native_sectors
;
3771 if (!ata_dev_enabled(dev
))
3774 /* fail early if !ATA && !ATAPI to avoid issuing [P]IDENTIFY to PMP */
3775 if (ata_class_enabled(new_class
) &&
3776 new_class
!= ATA_DEV_ATA
&&
3777 new_class
!= ATA_DEV_ATAPI
&&
3778 new_class
!= ATA_DEV_ZAC
&&
3779 new_class
!= ATA_DEV_SEMB
) {
3780 ata_dev_info(dev
, "class mismatch %u != %u\n",
3781 dev
->class, new_class
);
3787 rc
= ata_dev_reread_id(dev
, readid_flags
);
3791 /* configure device according to the new ID */
3792 rc
= ata_dev_configure(dev
);
3796 /* verify n_sectors hasn't changed */
3797 if (dev
->class != ATA_DEV_ATA
|| !n_sectors
||
3798 dev
->n_sectors
== n_sectors
)
3801 /* n_sectors has changed */
3802 ata_dev_warn(dev
, "n_sectors mismatch %llu != %llu\n",
3803 (unsigned long long)n_sectors
,
3804 (unsigned long long)dev
->n_sectors
);
3807 * Something could have caused HPA to be unlocked
3808 * involuntarily. If n_native_sectors hasn't changed and the
3809 * new size matches it, keep the device.
3811 if (dev
->n_native_sectors
== n_native_sectors
&&
3812 dev
->n_sectors
> n_sectors
&& dev
->n_sectors
== n_native_sectors
) {
3814 "new n_sectors matches native, probably "
3815 "late HPA unlock, n_sectors updated\n");
3816 /* use the larger n_sectors */
3821 * Some BIOSes boot w/o HPA but resume w/ HPA locked. Try
3822 * unlocking HPA in those cases.
3824 * https://bugzilla.kernel.org/show_bug.cgi?id=15396
3826 if (dev
->n_native_sectors
== n_native_sectors
&&
3827 dev
->n_sectors
< n_sectors
&& n_sectors
== n_native_sectors
&&
3828 !(dev
->horkage
& ATA_HORKAGE_BROKEN_HPA
)) {
3830 "old n_sectors matches native, probably "
3831 "late HPA lock, will try to unlock HPA\n");
3832 /* try unlocking HPA */
3833 dev
->flags
|= ATA_DFLAG_UNLOCK_HPA
;
3838 /* restore original n_[native_]sectors and fail */
3839 dev
->n_native_sectors
= n_native_sectors
;
3840 dev
->n_sectors
= n_sectors
;
3842 ata_dev_err(dev
, "revalidation failed (errno=%d)\n", rc
);
3846 struct ata_blacklist_entry
{
3847 const char *model_num
;
3848 const char *model_rev
;
3849 unsigned long horkage
;
3852 static const struct ata_blacklist_entry ata_device_blacklist
[] = {
3853 /* Devices with DMA related problems under Linux */
3854 { "WDC AC11000H", NULL
, ATA_HORKAGE_NODMA
},
3855 { "WDC AC22100H", NULL
, ATA_HORKAGE_NODMA
},
3856 { "WDC AC32500H", NULL
, ATA_HORKAGE_NODMA
},
3857 { "WDC AC33100H", NULL
, ATA_HORKAGE_NODMA
},
3858 { "WDC AC31600H", NULL
, ATA_HORKAGE_NODMA
},
3859 { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA
},
3860 { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA
},
3861 { "Compaq CRD-8241B", NULL
, ATA_HORKAGE_NODMA
},
3862 { "CRD-8400B", NULL
, ATA_HORKAGE_NODMA
},
3863 { "CRD-848[02]B", NULL
, ATA_HORKAGE_NODMA
},
3864 { "CRD-84", NULL
, ATA_HORKAGE_NODMA
},
3865 { "SanDisk SDP3B", NULL
, ATA_HORKAGE_NODMA
},
3866 { "SanDisk SDP3B-64", NULL
, ATA_HORKAGE_NODMA
},
3867 { "SANYO CD-ROM CRD", NULL
, ATA_HORKAGE_NODMA
},
3868 { "HITACHI CDR-8", NULL
, ATA_HORKAGE_NODMA
},
3869 { "HITACHI CDR-8[34]35",NULL
, ATA_HORKAGE_NODMA
},
3870 { "Toshiba CD-ROM XM-6202B", NULL
, ATA_HORKAGE_NODMA
},
3871 { "TOSHIBA CD-ROM XM-1702BC", NULL
, ATA_HORKAGE_NODMA
},
3872 { "CD-532E-A", NULL
, ATA_HORKAGE_NODMA
},
3873 { "E-IDE CD-ROM CR-840",NULL
, ATA_HORKAGE_NODMA
},
3874 { "CD-ROM Drive/F5A", NULL
, ATA_HORKAGE_NODMA
},
3875 { "WPI CDD-820", NULL
, ATA_HORKAGE_NODMA
},
3876 { "SAMSUNG CD-ROM SC-148C", NULL
, ATA_HORKAGE_NODMA
},
3877 { "SAMSUNG CD-ROM SC", NULL
, ATA_HORKAGE_NODMA
},
3878 { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL
,ATA_HORKAGE_NODMA
},
3879 { "_NEC DV5800A", NULL
, ATA_HORKAGE_NODMA
},
3880 { "SAMSUNG CD-ROM SN-124", "N001", ATA_HORKAGE_NODMA
},
3881 { "Seagate STT20000A", NULL
, ATA_HORKAGE_NODMA
},
3882 { " 2GB ATA Flash Disk", "ADMA428M", ATA_HORKAGE_NODMA
},
3883 { "VRFDFC22048UCHC-TE*", NULL
, ATA_HORKAGE_NODMA
},
3884 /* Odd clown on sil3726/4726 PMPs */
3885 { "Config Disk", NULL
, ATA_HORKAGE_DISABLE
},
3886 /* Similar story with ASMedia 1092 */
3887 { "ASMT109x- Config", NULL
, ATA_HORKAGE_DISABLE
},
3889 /* Weird ATAPI devices */
3890 { "TORiSAN DVD-ROM DRD-N216", NULL
, ATA_HORKAGE_MAX_SEC_128
},
3891 { "QUANTUM DAT DAT72-000", NULL
, ATA_HORKAGE_ATAPI_MOD16_DMA
},
3892 { "Slimtype DVD A DS8A8SH", NULL
, ATA_HORKAGE_MAX_SEC_LBA48
},
3893 { "Slimtype DVD A DS8A9SH", NULL
, ATA_HORKAGE_MAX_SEC_LBA48
},
3896 * Causes silent data corruption with higher max sects.
3897 * http://lkml.kernel.org/g/x49wpy40ysk.fsf@segfault.boston.devel.redhat.com
3899 { "ST380013AS", "3.20", ATA_HORKAGE_MAX_SEC_1024
},
3902 * These devices time out with higher max sects.
3903 * https://bugzilla.kernel.org/show_bug.cgi?id=121671
3905 { "LITEON CX1-JB*-HP", NULL
, ATA_HORKAGE_MAX_SEC_1024
},
3906 { "LITEON EP1-*", NULL
, ATA_HORKAGE_MAX_SEC_1024
},
3908 /* Devices we expect to fail diagnostics */
3910 /* Devices where NCQ should be avoided */
3912 { "WDC WD740ADFD-00", NULL
, ATA_HORKAGE_NONCQ
},
3913 { "WDC WD740ADFD-00NLR1", NULL
, ATA_HORKAGE_NONCQ
},
3914 /* http://thread.gmane.org/gmane.linux.ide/14907 */
3915 { "FUJITSU MHT2060BH", NULL
, ATA_HORKAGE_NONCQ
},
3917 { "Maxtor *", "BANC*", ATA_HORKAGE_NONCQ
},
3918 { "Maxtor 7V300F0", "VA111630", ATA_HORKAGE_NONCQ
},
3919 { "ST380817AS", "3.42", ATA_HORKAGE_NONCQ
},
3920 { "ST3160023AS", "3.42", ATA_HORKAGE_NONCQ
},
3921 { "OCZ CORE_SSD", "02.10104", ATA_HORKAGE_NONCQ
},
3923 /* Seagate NCQ + FLUSH CACHE firmware bug */
3924 { "ST31500341AS", "SD1[5-9]", ATA_HORKAGE_NONCQ
|
3925 ATA_HORKAGE_FIRMWARE_WARN
},
3927 { "ST31000333AS", "SD1[5-9]", ATA_HORKAGE_NONCQ
|
3928 ATA_HORKAGE_FIRMWARE_WARN
},
3930 { "ST3640[36]23AS", "SD1[5-9]", ATA_HORKAGE_NONCQ
|
3931 ATA_HORKAGE_FIRMWARE_WARN
},
3933 { "ST3320[68]13AS", "SD1[5-9]", ATA_HORKAGE_NONCQ
|
3934 ATA_HORKAGE_FIRMWARE_WARN
},
3936 /* drives which fail FPDMA_AA activation (some may freeze afterwards)
3937 the ST disks also have LPM issues */
3938 { "ST1000LM024 HN-M101MBB", NULL
, ATA_HORKAGE_BROKEN_FPDMA_AA
|
3939 ATA_HORKAGE_NOLPM
},
3940 { "VB0250EAVER", "HPG7", ATA_HORKAGE_BROKEN_FPDMA_AA
},
3942 /* Blacklist entries taken from Silicon Image 3124/3132
3943 Windows driver .inf file - also several Linux problem reports */
3944 { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ
},
3945 { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ
},
3946 { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ
},
3948 /* https://bugzilla.kernel.org/show_bug.cgi?id=15573 */
3949 { "C300-CTFDDAC128MAG", "0001", ATA_HORKAGE_NONCQ
},
3951 /* Sandisk SD7/8/9s lock up hard on large trims */
3952 { "SanDisk SD[789]*", NULL
, ATA_HORKAGE_MAX_TRIM_128M
},
3954 /* devices which puke on READ_NATIVE_MAX */
3955 { "HDS724040KLSA80", "KFAOA20N", ATA_HORKAGE_BROKEN_HPA
},
3956 { "WDC WD3200JD-00KLB0", "WD-WCAMR1130137", ATA_HORKAGE_BROKEN_HPA
},
3957 { "WDC WD2500JD-00HBB0", "WD-WMAL71490727", ATA_HORKAGE_BROKEN_HPA
},
3958 { "MAXTOR 6L080L4", "A93.0500", ATA_HORKAGE_BROKEN_HPA
},
3960 /* this one allows HPA unlocking but fails IOs on the area */
3961 { "OCZ-VERTEX", "1.30", ATA_HORKAGE_BROKEN_HPA
},
3963 /* Devices which report 1 sector over size HPA */
3964 { "ST340823A", NULL
, ATA_HORKAGE_HPA_SIZE
},
3965 { "ST320413A", NULL
, ATA_HORKAGE_HPA_SIZE
},
3966 { "ST310211A", NULL
, ATA_HORKAGE_HPA_SIZE
},
3968 /* Devices which get the IVB wrong */
3969 { "QUANTUM FIREBALLlct10 05", "A03.0900", ATA_HORKAGE_IVB
},
3970 /* Maybe we should just blacklist TSSTcorp... */
3971 { "TSSTcorp CDDVDW SH-S202[HJN]", "SB0[01]", ATA_HORKAGE_IVB
},
3973 /* Devices that do not need bridging limits applied */
3974 { "MTRON MSP-SATA*", NULL
, ATA_HORKAGE_BRIDGE_OK
},
3975 { "BUFFALO HD-QSU2/R5", NULL
, ATA_HORKAGE_BRIDGE_OK
},
3977 /* Devices which aren't very happy with higher link speeds */
3978 { "WD My Book", NULL
, ATA_HORKAGE_1_5_GBPS
},
3979 { "Seagate FreeAgent GoFlex", NULL
, ATA_HORKAGE_1_5_GBPS
},
3982 * Devices which choke on SETXFER. Applies only if both the
3983 * device and controller are SATA.
3985 { "PIONEER DVD-RW DVRTD08", NULL
, ATA_HORKAGE_NOSETXFER
},
3986 { "PIONEER DVD-RW DVRTD08A", NULL
, ATA_HORKAGE_NOSETXFER
},
3987 { "PIONEER DVD-RW DVR-215", NULL
, ATA_HORKAGE_NOSETXFER
},
3988 { "PIONEER DVD-RW DVR-212D", NULL
, ATA_HORKAGE_NOSETXFER
},
3989 { "PIONEER DVD-RW DVR-216D", NULL
, ATA_HORKAGE_NOSETXFER
},
3991 /* Crucial BX100 SSD 500GB has broken LPM support */
3992 { "CT500BX100SSD1", NULL
, ATA_HORKAGE_NOLPM
},
3994 /* 512GB MX100 with MU01 firmware has both queued TRIM and LPM issues */
3995 { "Crucial_CT512MX100*", "MU01", ATA_HORKAGE_NO_NCQ_TRIM
|
3996 ATA_HORKAGE_ZERO_AFTER_TRIM
|
3997 ATA_HORKAGE_NOLPM
},
3998 /* 512GB MX100 with newer firmware has only LPM issues */
3999 { "Crucial_CT512MX100*", NULL
, ATA_HORKAGE_ZERO_AFTER_TRIM
|
4000 ATA_HORKAGE_NOLPM
},
4002 /* 480GB+ M500 SSDs have both queued TRIM and LPM issues */
4003 { "Crucial_CT480M500*", NULL
, ATA_HORKAGE_NO_NCQ_TRIM
|
4004 ATA_HORKAGE_ZERO_AFTER_TRIM
|
4005 ATA_HORKAGE_NOLPM
},
4006 { "Crucial_CT960M500*", NULL
, ATA_HORKAGE_NO_NCQ_TRIM
|
4007 ATA_HORKAGE_ZERO_AFTER_TRIM
|
4008 ATA_HORKAGE_NOLPM
},
4010 /* These specific Samsung models/firmware-revs do not handle LPM well */
4011 { "SAMSUNG MZMPC128HBFU-000MV", "CXM14M1Q", ATA_HORKAGE_NOLPM
},
4012 { "SAMSUNG SSD PM830 mSATA *", "CXM13D1Q", ATA_HORKAGE_NOLPM
},
4013 { "SAMSUNG MZ7TD256HAFV-000L9", NULL
, ATA_HORKAGE_NOLPM
},
4014 { "SAMSUNG MZ7TE512HMHP-000L1", "EXT06L0Q", ATA_HORKAGE_NOLPM
},
4016 /* devices that don't properly handle queued TRIM commands */
4017 { "Micron_M500IT_*", "MU01", ATA_HORKAGE_NO_NCQ_TRIM
|
4018 ATA_HORKAGE_ZERO_AFTER_TRIM
},
4019 { "Micron_M500_*", NULL
, ATA_HORKAGE_NO_NCQ_TRIM
|
4020 ATA_HORKAGE_ZERO_AFTER_TRIM
},
4021 { "Crucial_CT*M500*", NULL
, ATA_HORKAGE_NO_NCQ_TRIM
|
4022 ATA_HORKAGE_ZERO_AFTER_TRIM
},
4023 { "Micron_M5[15]0_*", "MU01", ATA_HORKAGE_NO_NCQ_TRIM
|
4024 ATA_HORKAGE_ZERO_AFTER_TRIM
},
4025 { "Crucial_CT*M550*", "MU01", ATA_HORKAGE_NO_NCQ_TRIM
|
4026 ATA_HORKAGE_ZERO_AFTER_TRIM
},
4027 { "Crucial_CT*MX100*", "MU01", ATA_HORKAGE_NO_NCQ_TRIM
|
4028 ATA_HORKAGE_ZERO_AFTER_TRIM
},
4029 { "Samsung SSD 840 EVO*", NULL
, ATA_HORKAGE_NO_NCQ_TRIM
|
4030 ATA_HORKAGE_NO_DMA_LOG
|
4031 ATA_HORKAGE_ZERO_AFTER_TRIM
},
4032 { "Samsung SSD 840*", NULL
, ATA_HORKAGE_NO_NCQ_TRIM
|
4033 ATA_HORKAGE_ZERO_AFTER_TRIM
},
4034 { "Samsung SSD 850*", NULL
, ATA_HORKAGE_NO_NCQ_TRIM
|
4035 ATA_HORKAGE_ZERO_AFTER_TRIM
},
4036 { "Samsung SSD 860*", NULL
, ATA_HORKAGE_NO_NCQ_TRIM
|
4037 ATA_HORKAGE_ZERO_AFTER_TRIM
|
4038 ATA_HORKAGE_NO_NCQ_ON_ATI
},
4039 { "Samsung SSD 870*", NULL
, ATA_HORKAGE_NO_NCQ_TRIM
|
4040 ATA_HORKAGE_ZERO_AFTER_TRIM
|
4041 ATA_HORKAGE_NO_NCQ_ON_ATI
},
4042 { "FCCT*M500*", NULL
, ATA_HORKAGE_NO_NCQ_TRIM
|
4043 ATA_HORKAGE_ZERO_AFTER_TRIM
},
4045 /* devices that don't properly handle TRIM commands */
4046 { "SuperSSpeed S238*", NULL
, ATA_HORKAGE_NOTRIM
},
4047 { "M88V29*", NULL
, ATA_HORKAGE_NOTRIM
},
4050 * As defined, the DRAT (Deterministic Read After Trim) and RZAT
4051 * (Return Zero After Trim) flags in the ATA Command Set are
4052 * unreliable in the sense that they only define what happens if
4053 * the device successfully executed the DSM TRIM command. TRIM
4054 * is only advisory, however, and the device is free to silently
4055 * ignore all or parts of the request.
4057 * Whitelist drives that are known to reliably return zeroes
4062 * The intel 510 drive has buggy DRAT/RZAT. Explicitly exclude
4063 * that model before whitelisting all other intel SSDs.
4065 { "INTEL*SSDSC2MH*", NULL
, 0 },
4067 { "Micron*", NULL
, ATA_HORKAGE_ZERO_AFTER_TRIM
},
4068 { "Crucial*", NULL
, ATA_HORKAGE_ZERO_AFTER_TRIM
},
4069 { "INTEL*SSD*", NULL
, ATA_HORKAGE_ZERO_AFTER_TRIM
},
4070 { "SSD*INTEL*", NULL
, ATA_HORKAGE_ZERO_AFTER_TRIM
},
4071 { "Samsung*SSD*", NULL
, ATA_HORKAGE_ZERO_AFTER_TRIM
},
4072 { "SAMSUNG*SSD*", NULL
, ATA_HORKAGE_ZERO_AFTER_TRIM
},
4073 { "SAMSUNG*MZ7KM*", NULL
, ATA_HORKAGE_ZERO_AFTER_TRIM
},
4074 { "ST[1248][0248]0[FH]*", NULL
, ATA_HORKAGE_ZERO_AFTER_TRIM
},
4077 * Some WD SATA-I drives spin up and down erratically when the link
4078 * is put into the slumber mode. We don't have full list of the
4079 * affected devices. Disable LPM if the device matches one of the
4080 * known prefixes and is SATA-1. As a side effect LPM partial is
4083 * https://bugzilla.kernel.org/show_bug.cgi?id=57211
4085 { "WDC WD800JD-*", NULL
, ATA_HORKAGE_WD_BROKEN_LPM
},
4086 { "WDC WD1200JD-*", NULL
, ATA_HORKAGE_WD_BROKEN_LPM
},
4087 { "WDC WD1600JD-*", NULL
, ATA_HORKAGE_WD_BROKEN_LPM
},
4088 { "WDC WD2000JD-*", NULL
, ATA_HORKAGE_WD_BROKEN_LPM
},
4089 { "WDC WD2500JD-*", NULL
, ATA_HORKAGE_WD_BROKEN_LPM
},
4090 { "WDC WD3000JD-*", NULL
, ATA_HORKAGE_WD_BROKEN_LPM
},
4091 { "WDC WD3200JD-*", NULL
, ATA_HORKAGE_WD_BROKEN_LPM
},
4094 * This sata dom device goes on a walkabout when the ATA_LOG_DIRECTORY
4095 * log page is accessed. Ensure we never ask for this log page with
4098 { "SATADOM-ML 3ME", NULL
, ATA_HORKAGE_NO_LOG_DIR
},
4104 static unsigned long ata_dev_blacklisted(const struct ata_device
*dev
)
4106 unsigned char model_num
[ATA_ID_PROD_LEN
+ 1];
4107 unsigned char model_rev
[ATA_ID_FW_REV_LEN
+ 1];
4108 const struct ata_blacklist_entry
*ad
= ata_device_blacklist
;
4110 ata_id_c_string(dev
->id
, model_num
, ATA_ID_PROD
, sizeof(model_num
));
4111 ata_id_c_string(dev
->id
, model_rev
, ATA_ID_FW_REV
, sizeof(model_rev
));
4113 while (ad
->model_num
) {
4114 if (glob_match(ad
->model_num
, model_num
)) {
4115 if (ad
->model_rev
== NULL
)
4117 if (glob_match(ad
->model_rev
, model_rev
))
4125 static int ata_dma_blacklisted(const struct ata_device
*dev
)
4127 /* We don't support polling DMA.
4128 * DMA blacklist those ATAPI devices with CDB-intr (and use PIO)
4129 * if the LLDD handles only interrupts in the HSM_ST_LAST state.
4131 if ((dev
->link
->ap
->flags
& ATA_FLAG_PIO_POLLING
) &&
4132 (dev
->flags
& ATA_DFLAG_CDB_INTR
))
4134 return (dev
->horkage
& ATA_HORKAGE_NODMA
) ? 1 : 0;
4138 * ata_is_40wire - check drive side detection
4141 * Perform drive side detection decoding, allowing for device vendors
4142 * who can't follow the documentation.
4145 static int ata_is_40wire(struct ata_device
*dev
)
4147 if (dev
->horkage
& ATA_HORKAGE_IVB
)
4148 return ata_drive_40wire_relaxed(dev
->id
);
4149 return ata_drive_40wire(dev
->id
);
4153 * cable_is_40wire - 40/80/SATA decider
4154 * @ap: port to consider
4156 * This function encapsulates the policy for speed management
4157 * in one place. At the moment we don't cache the result but
4158 * there is a good case for setting ap->cbl to the result when
4159 * we are called with unknown cables (and figuring out if it
4160 * impacts hotplug at all).
4162 * Return 1 if the cable appears to be 40 wire.
4165 static int cable_is_40wire(struct ata_port
*ap
)
4167 struct ata_link
*link
;
4168 struct ata_device
*dev
;
4170 /* If the controller thinks we are 40 wire, we are. */
4171 if (ap
->cbl
== ATA_CBL_PATA40
)
4174 /* If the controller thinks we are 80 wire, we are. */
4175 if (ap
->cbl
== ATA_CBL_PATA80
|| ap
->cbl
== ATA_CBL_SATA
)
4178 /* If the system is known to be 40 wire short cable (eg
4179 * laptop), then we allow 80 wire modes even if the drive
4182 if (ap
->cbl
== ATA_CBL_PATA40_SHORT
)
4185 /* If the controller doesn't know, we scan.
4187 * Note: We look for all 40 wire detects at this point. Any
4188 * 80 wire detect is taken to be 80 wire cable because
4189 * - in many setups only the one drive (slave if present) will
4190 * give a valid detect
4191 * - if you have a non detect capable drive you don't want it
4192 * to colour the choice
4194 ata_for_each_link(link
, ap
, EDGE
) {
4195 ata_for_each_dev(dev
, link
, ENABLED
) {
4196 if (!ata_is_40wire(dev
))
4204 * ata_dev_xfermask - Compute supported xfermask of the given device
4205 * @dev: Device to compute xfermask for
4207 * Compute supported xfermask of @dev and store it in
4208 * dev->*_mask. This function is responsible for applying all
4209 * known limits including host controller limits, device
4215 static void ata_dev_xfermask(struct ata_device
*dev
)
4217 struct ata_link
*link
= dev
->link
;
4218 struct ata_port
*ap
= link
->ap
;
4219 struct ata_host
*host
= ap
->host
;
4220 unsigned int xfer_mask
;
4222 /* controller modes available */
4223 xfer_mask
= ata_pack_xfermask(ap
->pio_mask
,
4224 ap
->mwdma_mask
, ap
->udma_mask
);
4226 /* drive modes available */
4227 xfer_mask
&= ata_pack_xfermask(dev
->pio_mask
,
4228 dev
->mwdma_mask
, dev
->udma_mask
);
4229 xfer_mask
&= ata_id_xfermask(dev
->id
);
4232 * CFA Advanced TrueIDE timings are not allowed on a shared
4235 if (ata_dev_pair(dev
)) {
4236 /* No PIO5 or PIO6 */
4237 xfer_mask
&= ~(0x03 << (ATA_SHIFT_PIO
+ 5));
4238 /* No MWDMA3 or MWDMA 4 */
4239 xfer_mask
&= ~(0x03 << (ATA_SHIFT_MWDMA
+ 3));
4242 if (ata_dma_blacklisted(dev
)) {
4243 xfer_mask
&= ~(ATA_MASK_MWDMA
| ATA_MASK_UDMA
);
4245 "device is on DMA blacklist, disabling DMA\n");
4248 if ((host
->flags
& ATA_HOST_SIMPLEX
) &&
4249 host
->simplex_claimed
&& host
->simplex_claimed
!= ap
) {
4250 xfer_mask
&= ~(ATA_MASK_MWDMA
| ATA_MASK_UDMA
);
4252 "simplex DMA is claimed by other device, disabling DMA\n");
4255 if (ap
->flags
& ATA_FLAG_NO_IORDY
)
4256 xfer_mask
&= ata_pio_mask_no_iordy(dev
);
4258 if (ap
->ops
->mode_filter
)
4259 xfer_mask
= ap
->ops
->mode_filter(dev
, xfer_mask
);
4261 /* Apply cable rule here. Don't apply it early because when
4262 * we handle hot plug the cable type can itself change.
4263 * Check this last so that we know if the transfer rate was
4264 * solely limited by the cable.
4265 * Unknown or 80 wire cables reported host side are checked
4266 * drive side as well. Cases where we know a 40wire cable
4267 * is used safely for 80 are not checked here.
4269 if (xfer_mask
& (0xF8 << ATA_SHIFT_UDMA
))
4270 /* UDMA/44 or higher would be available */
4271 if (cable_is_40wire(ap
)) {
4273 "limited to UDMA/33 due to 40-wire cable\n");
4274 xfer_mask
&= ~(0xF8 << ATA_SHIFT_UDMA
);
4277 ata_unpack_xfermask(xfer_mask
, &dev
->pio_mask
,
4278 &dev
->mwdma_mask
, &dev
->udma_mask
);
4282 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
4283 * @dev: Device to which command will be sent
4285 * Issue SET FEATURES - XFER MODE command to device @dev
4289 * PCI/etc. bus probe sem.
4292 * 0 on success, AC_ERR_* mask otherwise.
4295 static unsigned int ata_dev_set_xfermode(struct ata_device
*dev
)
4297 struct ata_taskfile tf
;
4298 unsigned int err_mask
;
4300 /* set up set-features taskfile */
4301 ata_dev_dbg(dev
, "set features - xfer mode\n");
4303 /* Some controllers and ATAPI devices show flaky interrupt
4304 * behavior after setting xfer mode. Use polling instead.
4306 ata_tf_init(dev
, &tf
);
4307 tf
.command
= ATA_CMD_SET_FEATURES
;
4308 tf
.feature
= SETFEATURES_XFER
;
4309 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
| ATA_TFLAG_POLLING
;
4310 tf
.protocol
= ATA_PROT_NODATA
;
4311 /* If we are using IORDY we must send the mode setting command */
4312 if (ata_pio_need_iordy(dev
))
4313 tf
.nsect
= dev
->xfer_mode
;
4314 /* If the device has IORDY and the controller does not - turn it off */
4315 else if (ata_id_has_iordy(dev
->id
))
4317 else /* In the ancient relic department - skip all of this */
4320 /* On some disks, this command causes spin-up, so we need longer timeout */
4321 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 15000);
4327 * ata_dev_set_feature - Issue SET FEATURES - SATA FEATURES
4328 * @dev: Device to which command will be sent
4329 * @enable: Whether to enable or disable the feature
4330 * @feature: The sector count represents the feature to set
4332 * Issue SET FEATURES - SATA FEATURES command to device @dev
4333 * on port @ap with sector count
4336 * PCI/etc. bus probe sem.
4339 * 0 on success, AC_ERR_* mask otherwise.
4341 unsigned int ata_dev_set_feature(struct ata_device
*dev
, u8 enable
, u8 feature
)
4343 struct ata_taskfile tf
;
4344 unsigned int err_mask
;
4345 unsigned int timeout
= 0;
4347 /* set up set-features taskfile */
4348 ata_dev_dbg(dev
, "set features - SATA features\n");
4350 ata_tf_init(dev
, &tf
);
4351 tf
.command
= ATA_CMD_SET_FEATURES
;
4352 tf
.feature
= enable
;
4353 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
4354 tf
.protocol
= ATA_PROT_NODATA
;
4357 if (enable
== SETFEATURES_SPINUP
)
4358 timeout
= ata_probe_timeout
?
4359 ata_probe_timeout
* 1000 : SETFEATURES_SPINUP_TIMEOUT
;
4360 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, timeout
);
4364 EXPORT_SYMBOL_GPL(ata_dev_set_feature
);
4367 * ata_dev_init_params - Issue INIT DEV PARAMS command
4368 * @dev: Device to which command will be sent
4369 * @heads: Number of heads (taskfile parameter)
4370 * @sectors: Number of sectors (taskfile parameter)
4373 * Kernel thread context (may sleep)
4376 * 0 on success, AC_ERR_* mask otherwise.
4378 static unsigned int ata_dev_init_params(struct ata_device
*dev
,
4379 u16 heads
, u16 sectors
)
4381 struct ata_taskfile tf
;
4382 unsigned int err_mask
;
4384 /* Number of sectors per track 1-255. Number of heads 1-16 */
4385 if (sectors
< 1 || sectors
> 255 || heads
< 1 || heads
> 16)
4386 return AC_ERR_INVALID
;
4388 /* set up init dev params taskfile */
4389 ata_dev_dbg(dev
, "init dev params \n");
4391 ata_tf_init(dev
, &tf
);
4392 tf
.command
= ATA_CMD_INIT_DEV_PARAMS
;
4393 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
4394 tf
.protocol
= ATA_PROT_NODATA
;
4396 tf
.device
|= (heads
- 1) & 0x0f; /* max head = num. of heads - 1 */
4398 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
4399 /* A clean abort indicates an original or just out of spec drive
4400 and we should continue as we issue the setup based on the
4401 drive reported working geometry */
4402 if (err_mask
== AC_ERR_DEV
&& (tf
.error
& ATA_ABORTED
))
4409 * atapi_check_dma - Check whether ATAPI DMA can be supported
4410 * @qc: Metadata associated with taskfile to check
4412 * Allow low-level driver to filter ATA PACKET commands, returning
4413 * a status indicating whether or not it is OK to use DMA for the
4414 * supplied PACKET command.
4417 * spin_lock_irqsave(host lock)
4419 * RETURNS: 0 when ATAPI DMA can be used
4422 int atapi_check_dma(struct ata_queued_cmd
*qc
)
4424 struct ata_port
*ap
= qc
->ap
;
4426 /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a
4427 * few ATAPI devices choke on such DMA requests.
4429 if (!(qc
->dev
->horkage
& ATA_HORKAGE_ATAPI_MOD16_DMA
) &&
4430 unlikely(qc
->nbytes
& 15))
4433 if (ap
->ops
->check_atapi_dma
)
4434 return ap
->ops
->check_atapi_dma(qc
);
4440 * ata_std_qc_defer - Check whether a qc needs to be deferred
4441 * @qc: ATA command in question
4443 * Non-NCQ commands cannot run with any other command, NCQ or
4444 * not. As upper layer only knows the queue depth, we are
4445 * responsible for maintaining exclusion. This function checks
4446 * whether a new command @qc can be issued.
4449 * spin_lock_irqsave(host lock)
4452 * ATA_DEFER_* if deferring is needed, 0 otherwise.
4454 int ata_std_qc_defer(struct ata_queued_cmd
*qc
)
4456 struct ata_link
*link
= qc
->dev
->link
;
4458 if (ata_is_ncq(qc
->tf
.protocol
)) {
4459 if (!ata_tag_valid(link
->active_tag
))
4462 if (!ata_tag_valid(link
->active_tag
) && !link
->sactive
)
4466 return ATA_DEFER_LINK
;
4468 EXPORT_SYMBOL_GPL(ata_std_qc_defer
);
4470 enum ata_completion_errors
ata_noop_qc_prep(struct ata_queued_cmd
*qc
)
4474 EXPORT_SYMBOL_GPL(ata_noop_qc_prep
);
4477 * ata_sg_init - Associate command with scatter-gather table.
4478 * @qc: Command to be associated
4479 * @sg: Scatter-gather table.
4480 * @n_elem: Number of elements in s/g table.
4482 * Initialize the data-related elements of queued_cmd @qc
4483 * to point to a scatter-gather table @sg, containing @n_elem
4487 * spin_lock_irqsave(host lock)
4489 void ata_sg_init(struct ata_queued_cmd
*qc
, struct scatterlist
*sg
,
4490 unsigned int n_elem
)
4493 qc
->n_elem
= n_elem
;
4497 #ifdef CONFIG_HAS_DMA
4500 * ata_sg_clean - Unmap DMA memory associated with command
4501 * @qc: Command containing DMA memory to be released
4503 * Unmap all mapped DMA memory associated with this command.
4506 * spin_lock_irqsave(host lock)
4508 static void ata_sg_clean(struct ata_queued_cmd
*qc
)
4510 struct ata_port
*ap
= qc
->ap
;
4511 struct scatterlist
*sg
= qc
->sg
;
4512 int dir
= qc
->dma_dir
;
4514 WARN_ON_ONCE(sg
== NULL
);
4517 dma_unmap_sg(ap
->dev
, sg
, qc
->orig_n_elem
, dir
);
4519 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
4524 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
4525 * @qc: Command with scatter-gather table to be mapped.
4527 * DMA-map the scatter-gather table associated with queued_cmd @qc.
4530 * spin_lock_irqsave(host lock)
4533 * Zero on success, negative on error.
4536 static int ata_sg_setup(struct ata_queued_cmd
*qc
)
4538 struct ata_port
*ap
= qc
->ap
;
4539 unsigned int n_elem
;
4541 n_elem
= dma_map_sg(ap
->dev
, qc
->sg
, qc
->n_elem
, qc
->dma_dir
);
4545 qc
->orig_n_elem
= qc
->n_elem
;
4546 qc
->n_elem
= n_elem
;
4547 qc
->flags
|= ATA_QCFLAG_DMAMAP
;
4552 #else /* !CONFIG_HAS_DMA */
4554 static inline void ata_sg_clean(struct ata_queued_cmd
*qc
) {}
4555 static inline int ata_sg_setup(struct ata_queued_cmd
*qc
) { return -1; }
4557 #endif /* !CONFIG_HAS_DMA */
4560 * swap_buf_le16 - swap halves of 16-bit words in place
4561 * @buf: Buffer to swap
4562 * @buf_words: Number of 16-bit words in buffer.
4564 * Swap halves of 16-bit words if needed to convert from
4565 * little-endian byte order to native cpu byte order, or
4569 * Inherited from caller.
4571 void swap_buf_le16(u16
*buf
, unsigned int buf_words
)
4576 for (i
= 0; i
< buf_words
; i
++)
4577 buf
[i
] = le16_to_cpu(buf
[i
]);
4578 #endif /* __BIG_ENDIAN */
4582 * ata_qc_free - free unused ata_queued_cmd
4583 * @qc: Command to complete
4585 * Designed to free unused ata_queued_cmd object
4586 * in case something prevents using it.
4589 * spin_lock_irqsave(host lock)
4591 void ata_qc_free(struct ata_queued_cmd
*qc
)
4594 if (ata_tag_valid(qc
->tag
))
4595 qc
->tag
= ATA_TAG_POISON
;
4598 void __ata_qc_complete(struct ata_queued_cmd
*qc
)
4600 struct ata_port
*ap
;
4601 struct ata_link
*link
;
4603 WARN_ON_ONCE(qc
== NULL
); /* ata_qc_from_tag _might_ return NULL */
4604 WARN_ON_ONCE(!(qc
->flags
& ATA_QCFLAG_ACTIVE
));
4606 link
= qc
->dev
->link
;
4608 if (likely(qc
->flags
& ATA_QCFLAG_DMAMAP
))
4611 /* command should be marked inactive atomically with qc completion */
4612 if (ata_is_ncq(qc
->tf
.protocol
)) {
4613 link
->sactive
&= ~(1 << qc
->hw_tag
);
4615 ap
->nr_active_links
--;
4617 link
->active_tag
= ATA_TAG_POISON
;
4618 ap
->nr_active_links
--;
4621 /* clear exclusive status */
4622 if (unlikely(qc
->flags
& ATA_QCFLAG_CLEAR_EXCL
&&
4623 ap
->excl_link
== link
))
4624 ap
->excl_link
= NULL
;
4626 /* atapi: mark qc as inactive to prevent the interrupt handler
4627 * from completing the command twice later, before the error handler
4628 * is called. (when rc != 0 and atapi request sense is needed)
4630 qc
->flags
&= ~ATA_QCFLAG_ACTIVE
;
4631 ap
->qc_active
&= ~(1ULL << qc
->tag
);
4633 /* call completion callback */
4634 qc
->complete_fn(qc
);
4637 static void fill_result_tf(struct ata_queued_cmd
*qc
)
4639 struct ata_port
*ap
= qc
->ap
;
4641 qc
->result_tf
.flags
= qc
->tf
.flags
;
4642 ap
->ops
->qc_fill_rtf(qc
);
4645 static void ata_verify_xfer(struct ata_queued_cmd
*qc
)
4647 struct ata_device
*dev
= qc
->dev
;
4649 if (!ata_is_data(qc
->tf
.protocol
))
4652 if ((dev
->mwdma_mask
|| dev
->udma_mask
) && ata_is_pio(qc
->tf
.protocol
))
4655 dev
->flags
&= ~ATA_DFLAG_DUBIOUS_XFER
;
4659 * ata_qc_complete - Complete an active ATA command
4660 * @qc: Command to complete
4662 * Indicate to the mid and upper layers that an ATA command has
4663 * completed, with either an ok or not-ok status.
4665 * Refrain from calling this function multiple times when
4666 * successfully completing multiple NCQ commands.
4667 * ata_qc_complete_multiple() should be used instead, which will
4668 * properly update IRQ expect state.
4671 * spin_lock_irqsave(host lock)
4673 void ata_qc_complete(struct ata_queued_cmd
*qc
)
4675 struct ata_port
*ap
= qc
->ap
;
4677 /* Trigger the LED (if available) */
4678 ledtrig_disk_activity(!!(qc
->tf
.flags
& ATA_TFLAG_WRITE
));
4680 /* XXX: New EH and old EH use different mechanisms to
4681 * synchronize EH with regular execution path.
4683 * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED.
4684 * Normal execution path is responsible for not accessing a
4685 * failed qc. libata core enforces the rule by returning NULL
4686 * from ata_qc_from_tag() for failed qcs.
4688 * Old EH depends on ata_qc_complete() nullifying completion
4689 * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does
4690 * not synchronize with interrupt handler. Only PIO task is
4693 if (ap
->ops
->error_handler
) {
4694 struct ata_device
*dev
= qc
->dev
;
4695 struct ata_eh_info
*ehi
= &dev
->link
->eh_info
;
4697 if (unlikely(qc
->err_mask
))
4698 qc
->flags
|= ATA_QCFLAG_FAILED
;
4701 * Finish internal commands without any further processing
4702 * and always with the result TF filled.
4704 if (unlikely(ata_tag_internal(qc
->tag
))) {
4706 trace_ata_qc_complete_internal(qc
);
4707 __ata_qc_complete(qc
);
4712 * Non-internal qc has failed. Fill the result TF and
4715 if (unlikely(qc
->flags
& ATA_QCFLAG_FAILED
)) {
4717 trace_ata_qc_complete_failed(qc
);
4718 ata_qc_schedule_eh(qc
);
4722 WARN_ON_ONCE(ap
->pflags
& ATA_PFLAG_FROZEN
);
4724 /* read result TF if requested */
4725 if (qc
->flags
& ATA_QCFLAG_RESULT_TF
)
4728 trace_ata_qc_complete_done(qc
);
4729 /* Some commands need post-processing after successful
4732 switch (qc
->tf
.command
) {
4733 case ATA_CMD_SET_FEATURES
:
4734 if (qc
->tf
.feature
!= SETFEATURES_WC_ON
&&
4735 qc
->tf
.feature
!= SETFEATURES_WC_OFF
&&
4736 qc
->tf
.feature
!= SETFEATURES_RA_ON
&&
4737 qc
->tf
.feature
!= SETFEATURES_RA_OFF
)
4740 case ATA_CMD_INIT_DEV_PARAMS
: /* CHS translation changed */
4741 case ATA_CMD_SET_MULTI
: /* multi_count changed */
4742 /* revalidate device */
4743 ehi
->dev_action
[dev
->devno
] |= ATA_EH_REVALIDATE
;
4744 ata_port_schedule_eh(ap
);
4748 dev
->flags
|= ATA_DFLAG_SLEEPING
;
4752 if (unlikely(dev
->flags
& ATA_DFLAG_DUBIOUS_XFER
))
4753 ata_verify_xfer(qc
);
4755 __ata_qc_complete(qc
);
4757 if (qc
->flags
& ATA_QCFLAG_EH_SCHEDULED
)
4760 /* read result TF if failed or requested */
4761 if (qc
->err_mask
|| qc
->flags
& ATA_QCFLAG_RESULT_TF
)
4764 __ata_qc_complete(qc
);
4767 EXPORT_SYMBOL_GPL(ata_qc_complete
);
4770 * ata_qc_get_active - get bitmask of active qcs
4771 * @ap: port in question
4774 * spin_lock_irqsave(host lock)
4777 * Bitmask of active qcs
4779 u64
ata_qc_get_active(struct ata_port
*ap
)
4781 u64 qc_active
= ap
->qc_active
;
4783 /* ATA_TAG_INTERNAL is sent to hw as tag 0 */
4784 if (qc_active
& (1ULL << ATA_TAG_INTERNAL
)) {
4785 qc_active
|= (1 << 0);
4786 qc_active
&= ~(1ULL << ATA_TAG_INTERNAL
);
4791 EXPORT_SYMBOL_GPL(ata_qc_get_active
);
4794 * ata_qc_issue - issue taskfile to device
4795 * @qc: command to issue to device
4797 * Prepare an ATA command to submission to device.
4798 * This includes mapping the data into a DMA-able
4799 * area, filling in the S/G table, and finally
4800 * writing the taskfile to hardware, starting the command.
4803 * spin_lock_irqsave(host lock)
4805 void ata_qc_issue(struct ata_queued_cmd
*qc
)
4807 struct ata_port
*ap
= qc
->ap
;
4808 struct ata_link
*link
= qc
->dev
->link
;
4809 u8 prot
= qc
->tf
.protocol
;
4811 /* Make sure only one non-NCQ command is outstanding. The
4812 * check is skipped for old EH because it reuses active qc to
4813 * request ATAPI sense.
4815 WARN_ON_ONCE(ap
->ops
->error_handler
&& ata_tag_valid(link
->active_tag
));
4817 if (ata_is_ncq(prot
)) {
4818 WARN_ON_ONCE(link
->sactive
& (1 << qc
->hw_tag
));
4821 ap
->nr_active_links
++;
4822 link
->sactive
|= 1 << qc
->hw_tag
;
4824 WARN_ON_ONCE(link
->sactive
);
4826 ap
->nr_active_links
++;
4827 link
->active_tag
= qc
->tag
;
4830 qc
->flags
|= ATA_QCFLAG_ACTIVE
;
4831 ap
->qc_active
|= 1ULL << qc
->tag
;
4834 * We guarantee to LLDs that they will have at least one
4835 * non-zero sg if the command is a data command.
4837 if (ata_is_data(prot
) && (!qc
->sg
|| !qc
->n_elem
|| !qc
->nbytes
))
4840 if (ata_is_dma(prot
) || (ata_is_pio(prot
) &&
4841 (ap
->flags
& ATA_FLAG_PIO_DMA
)))
4842 if (ata_sg_setup(qc
))
4845 /* if device is sleeping, schedule reset and abort the link */
4846 if (unlikely(qc
->dev
->flags
& ATA_DFLAG_SLEEPING
)) {
4847 link
->eh_info
.action
|= ATA_EH_RESET
;
4848 ata_ehi_push_desc(&link
->eh_info
, "waking up from sleep");
4849 ata_link_abort(link
);
4853 trace_ata_qc_prep(qc
);
4854 qc
->err_mask
|= ap
->ops
->qc_prep(qc
);
4855 if (unlikely(qc
->err_mask
))
4857 trace_ata_qc_issue(qc
);
4858 qc
->err_mask
|= ap
->ops
->qc_issue(qc
);
4859 if (unlikely(qc
->err_mask
))
4864 qc
->err_mask
|= AC_ERR_SYSTEM
;
4866 ata_qc_complete(qc
);
4870 * ata_phys_link_online - test whether the given link is online
4871 * @link: ATA link to test
4873 * Test whether @link is online. Note that this function returns
4874 * 0 if online status of @link cannot be obtained, so
4875 * ata_link_online(link) != !ata_link_offline(link).
4881 * True if the port online status is available and online.
4883 bool ata_phys_link_online(struct ata_link
*link
)
4887 if (sata_scr_read(link
, SCR_STATUS
, &sstatus
) == 0 &&
4888 ata_sstatus_online(sstatus
))
4894 * ata_phys_link_offline - test whether the given link is offline
4895 * @link: ATA link to test
4897 * Test whether @link is offline. Note that this function
4898 * returns 0 if offline status of @link cannot be obtained, so
4899 * ata_link_online(link) != !ata_link_offline(link).
4905 * True if the port offline status is available and offline.
4907 bool ata_phys_link_offline(struct ata_link
*link
)
4911 if (sata_scr_read(link
, SCR_STATUS
, &sstatus
) == 0 &&
4912 !ata_sstatus_online(sstatus
))
4918 * ata_link_online - test whether the given link is online
4919 * @link: ATA link to test
4921 * Test whether @link is online. This is identical to
4922 * ata_phys_link_online() when there's no slave link. When
4923 * there's a slave link, this function should only be called on
4924 * the master link and will return true if any of M/S links is
4931 * True if the port online status is available and online.
4933 bool ata_link_online(struct ata_link
*link
)
4935 struct ata_link
*slave
= link
->ap
->slave_link
;
4937 WARN_ON(link
== slave
); /* shouldn't be called on slave link */
4939 return ata_phys_link_online(link
) ||
4940 (slave
&& ata_phys_link_online(slave
));
4942 EXPORT_SYMBOL_GPL(ata_link_online
);
4945 * ata_link_offline - test whether the given link is offline
4946 * @link: ATA link to test
4948 * Test whether @link is offline. This is identical to
4949 * ata_phys_link_offline() when there's no slave link. When
4950 * there's a slave link, this function should only be called on
4951 * the master link and will return true if both M/S links are
4958 * True if the port offline status is available and offline.
4960 bool ata_link_offline(struct ata_link
*link
)
4962 struct ata_link
*slave
= link
->ap
->slave_link
;
4964 WARN_ON(link
== slave
); /* shouldn't be called on slave link */
4966 return ata_phys_link_offline(link
) &&
4967 (!slave
|| ata_phys_link_offline(slave
));
4969 EXPORT_SYMBOL_GPL(ata_link_offline
);
4972 static void ata_port_request_pm(struct ata_port
*ap
, pm_message_t mesg
,
4973 unsigned int action
, unsigned int ehi_flags
,
4976 struct ata_link
*link
;
4977 unsigned long flags
;
4979 /* Previous resume operation might still be in
4980 * progress. Wait for PM_PENDING to clear.
4982 if (ap
->pflags
& ATA_PFLAG_PM_PENDING
) {
4983 ata_port_wait_eh(ap
);
4984 WARN_ON(ap
->pflags
& ATA_PFLAG_PM_PENDING
);
4987 /* request PM ops to EH */
4988 spin_lock_irqsave(ap
->lock
, flags
);
4991 ap
->pflags
|= ATA_PFLAG_PM_PENDING
;
4992 ata_for_each_link(link
, ap
, HOST_FIRST
) {
4993 link
->eh_info
.action
|= action
;
4994 link
->eh_info
.flags
|= ehi_flags
;
4997 ata_port_schedule_eh(ap
);
4999 spin_unlock_irqrestore(ap
->lock
, flags
);
5002 ata_port_wait_eh(ap
);
5003 WARN_ON(ap
->pflags
& ATA_PFLAG_PM_PENDING
);
5008 * On some hardware, device fails to respond after spun down for suspend. As
5009 * the device won't be used before being resumed, we don't need to touch the
5010 * device. Ask EH to skip the usual stuff and proceed directly to suspend.
5012 * http://thread.gmane.org/gmane.linux.ide/46764
5014 static const unsigned int ata_port_suspend_ehi
= ATA_EHI_QUIET
5015 | ATA_EHI_NO_AUTOPSY
5016 | ATA_EHI_NO_RECOVERY
;
5018 static void ata_port_suspend(struct ata_port
*ap
, pm_message_t mesg
)
5020 ata_port_request_pm(ap
, mesg
, 0, ata_port_suspend_ehi
, false);
5023 static void ata_port_suspend_async(struct ata_port
*ap
, pm_message_t mesg
)
5025 ata_port_request_pm(ap
, mesg
, 0, ata_port_suspend_ehi
, true);
5028 static int ata_port_pm_suspend(struct device
*dev
)
5030 struct ata_port
*ap
= to_ata_port(dev
);
5032 if (pm_runtime_suspended(dev
))
5035 ata_port_suspend(ap
, PMSG_SUSPEND
);
5039 static int ata_port_pm_freeze(struct device
*dev
)
5041 struct ata_port
*ap
= to_ata_port(dev
);
5043 if (pm_runtime_suspended(dev
))
5046 ata_port_suspend(ap
, PMSG_FREEZE
);
5050 static int ata_port_pm_poweroff(struct device
*dev
)
5052 ata_port_suspend(to_ata_port(dev
), PMSG_HIBERNATE
);
5056 static const unsigned int ata_port_resume_ehi
= ATA_EHI_NO_AUTOPSY
5059 static void ata_port_resume(struct ata_port
*ap
, pm_message_t mesg
)
5061 ata_port_request_pm(ap
, mesg
, ATA_EH_RESET
, ata_port_resume_ehi
, false);
5064 static void ata_port_resume_async(struct ata_port
*ap
, pm_message_t mesg
)
5066 ata_port_request_pm(ap
, mesg
, ATA_EH_RESET
, ata_port_resume_ehi
, true);
5069 static int ata_port_pm_resume(struct device
*dev
)
5071 ata_port_resume_async(to_ata_port(dev
), PMSG_RESUME
);
5072 pm_runtime_disable(dev
);
5073 pm_runtime_set_active(dev
);
5074 pm_runtime_enable(dev
);
5079 * For ODDs, the upper layer will poll for media change every few seconds,
5080 * which will make it enter and leave suspend state every few seconds. And
5081 * as each suspend will cause a hard/soft reset, the gain of runtime suspend
5082 * is very little and the ODD may malfunction after constantly being reset.
5083 * So the idle callback here will not proceed to suspend if a non-ZPODD capable
5084 * ODD is attached to the port.
5086 static int ata_port_runtime_idle(struct device
*dev
)
5088 struct ata_port
*ap
= to_ata_port(dev
);
5089 struct ata_link
*link
;
5090 struct ata_device
*adev
;
5092 ata_for_each_link(link
, ap
, HOST_FIRST
) {
5093 ata_for_each_dev(adev
, link
, ENABLED
)
5094 if (adev
->class == ATA_DEV_ATAPI
&&
5095 !zpodd_dev_enabled(adev
))
5102 static int ata_port_runtime_suspend(struct device
*dev
)
5104 ata_port_suspend(to_ata_port(dev
), PMSG_AUTO_SUSPEND
);
5108 static int ata_port_runtime_resume(struct device
*dev
)
5110 ata_port_resume(to_ata_port(dev
), PMSG_AUTO_RESUME
);
5114 static const struct dev_pm_ops ata_port_pm_ops
= {
5115 .suspend
= ata_port_pm_suspend
,
5116 .resume
= ata_port_pm_resume
,
5117 .freeze
= ata_port_pm_freeze
,
5118 .thaw
= ata_port_pm_resume
,
5119 .poweroff
= ata_port_pm_poweroff
,
5120 .restore
= ata_port_pm_resume
,
5122 .runtime_suspend
= ata_port_runtime_suspend
,
5123 .runtime_resume
= ata_port_runtime_resume
,
5124 .runtime_idle
= ata_port_runtime_idle
,
5127 /* sas ports don't participate in pm runtime management of ata_ports,
5128 * and need to resume ata devices at the domain level, not the per-port
5129 * level. sas suspend/resume is async to allow parallel port recovery
5130 * since sas has multiple ata_port instances per Scsi_Host.
5132 void ata_sas_port_suspend(struct ata_port
*ap
)
5134 ata_port_suspend_async(ap
, PMSG_SUSPEND
);
5136 EXPORT_SYMBOL_GPL(ata_sas_port_suspend
);
5138 void ata_sas_port_resume(struct ata_port
*ap
)
5140 ata_port_resume_async(ap
, PMSG_RESUME
);
5142 EXPORT_SYMBOL_GPL(ata_sas_port_resume
);
5145 * ata_host_suspend - suspend host
5146 * @host: host to suspend
5149 * Suspend @host. Actual operation is performed by port suspend.
5151 void ata_host_suspend(struct ata_host
*host
, pm_message_t mesg
)
5153 host
->dev
->power
.power_state
= mesg
;
5155 EXPORT_SYMBOL_GPL(ata_host_suspend
);
5158 * ata_host_resume - resume host
5159 * @host: host to resume
5161 * Resume @host. Actual operation is performed by port resume.
5163 void ata_host_resume(struct ata_host
*host
)
5165 host
->dev
->power
.power_state
= PMSG_ON
;
5167 EXPORT_SYMBOL_GPL(ata_host_resume
);
5170 const struct device_type ata_port_type
= {
5173 .pm
= &ata_port_pm_ops
,
5178 * ata_dev_init - Initialize an ata_device structure
5179 * @dev: Device structure to initialize
5181 * Initialize @dev in preparation for probing.
5184 * Inherited from caller.
5186 void ata_dev_init(struct ata_device
*dev
)
5188 struct ata_link
*link
= ata_dev_phys_link(dev
);
5189 struct ata_port
*ap
= link
->ap
;
5190 unsigned long flags
;
5192 /* SATA spd limit is bound to the attached device, reset together */
5193 link
->sata_spd_limit
= link
->hw_sata_spd_limit
;
5196 /* High bits of dev->flags are used to record warm plug
5197 * requests which occur asynchronously. Synchronize using
5200 spin_lock_irqsave(ap
->lock
, flags
);
5201 dev
->flags
&= ~ATA_DFLAG_INIT_MASK
;
5203 spin_unlock_irqrestore(ap
->lock
, flags
);
5205 memset((void *)dev
+ ATA_DEVICE_CLEAR_BEGIN
, 0,
5206 ATA_DEVICE_CLEAR_END
- ATA_DEVICE_CLEAR_BEGIN
);
5207 dev
->pio_mask
= UINT_MAX
;
5208 dev
->mwdma_mask
= UINT_MAX
;
5209 dev
->udma_mask
= UINT_MAX
;
5213 * ata_link_init - Initialize an ata_link structure
5214 * @ap: ATA port link is attached to
5215 * @link: Link structure to initialize
5216 * @pmp: Port multiplier port number
5221 * Kernel thread context (may sleep)
5223 void ata_link_init(struct ata_port
*ap
, struct ata_link
*link
, int pmp
)
5227 /* clear everything except for devices */
5228 memset((void *)link
+ ATA_LINK_CLEAR_BEGIN
, 0,
5229 ATA_LINK_CLEAR_END
- ATA_LINK_CLEAR_BEGIN
);
5233 link
->active_tag
= ATA_TAG_POISON
;
5234 link
->hw_sata_spd_limit
= UINT_MAX
;
5236 /* can't use iterator, ap isn't initialized yet */
5237 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
5238 struct ata_device
*dev
= &link
->device
[i
];
5241 dev
->devno
= dev
- link
->device
;
5242 #ifdef CONFIG_ATA_ACPI
5243 dev
->gtf_filter
= ata_acpi_gtf_filter
;
5250 * sata_link_init_spd - Initialize link->sata_spd_limit
5251 * @link: Link to configure sata_spd_limit for
5253 * Initialize ``link->[hw_]sata_spd_limit`` to the currently
5257 * Kernel thread context (may sleep).
5260 * 0 on success, -errno on failure.
5262 int sata_link_init_spd(struct ata_link
*link
)
5267 rc
= sata_scr_read(link
, SCR_CONTROL
, &link
->saved_scontrol
);
5271 spd
= (link
->saved_scontrol
>> 4) & 0xf;
5273 link
->hw_sata_spd_limit
&= (1 << spd
) - 1;
5275 ata_force_link_limits(link
);
5277 link
->sata_spd_limit
= link
->hw_sata_spd_limit
;
5283 * ata_port_alloc - allocate and initialize basic ATA port resources
5284 * @host: ATA host this allocated port belongs to
5286 * Allocate and initialize basic ATA port resources.
5289 * Allocate ATA port on success, NULL on failure.
5292 * Inherited from calling layer (may sleep).
5294 struct ata_port
*ata_port_alloc(struct ata_host
*host
)
5296 struct ata_port
*ap
;
5298 ap
= kzalloc(sizeof(*ap
), GFP_KERNEL
);
5302 ap
->pflags
|= ATA_PFLAG_INITIALIZING
| ATA_PFLAG_FROZEN
;
5303 ap
->lock
= &host
->lock
;
5305 ap
->local_port_no
= -1;
5307 ap
->dev
= host
->dev
;
5309 mutex_init(&ap
->scsi_scan_mutex
);
5310 INIT_DELAYED_WORK(&ap
->hotplug_task
, ata_scsi_hotplug
);
5311 INIT_WORK(&ap
->scsi_rescan_task
, ata_scsi_dev_rescan
);
5312 INIT_LIST_HEAD(&ap
->eh_done_q
);
5313 init_waitqueue_head(&ap
->eh_wait_q
);
5314 init_completion(&ap
->park_req_pending
);
5315 timer_setup(&ap
->fastdrain_timer
, ata_eh_fastdrain_timerfn
,
5318 ap
->cbl
= ATA_CBL_NONE
;
5320 ata_link_init(ap
, &ap
->link
, 0);
5323 ap
->stats
.unhandled_irq
= 1;
5324 ap
->stats
.idle_irq
= 1;
5326 ata_sff_port_init(ap
);
5331 static void ata_devres_release(struct device
*gendev
, void *res
)
5333 struct ata_host
*host
= dev_get_drvdata(gendev
);
5336 for (i
= 0; i
< host
->n_ports
; i
++) {
5337 struct ata_port
*ap
= host
->ports
[i
];
5343 scsi_host_put(ap
->scsi_host
);
5347 dev_set_drvdata(gendev
, NULL
);
5351 static void ata_host_release(struct kref
*kref
)
5353 struct ata_host
*host
= container_of(kref
, struct ata_host
, kref
);
5356 for (i
= 0; i
< host
->n_ports
; i
++) {
5357 struct ata_port
*ap
= host
->ports
[i
];
5359 kfree(ap
->pmp_link
);
5360 kfree(ap
->slave_link
);
5362 host
->ports
[i
] = NULL
;
5367 void ata_host_get(struct ata_host
*host
)
5369 kref_get(&host
->kref
);
5372 void ata_host_put(struct ata_host
*host
)
5374 kref_put(&host
->kref
, ata_host_release
);
5376 EXPORT_SYMBOL_GPL(ata_host_put
);
5379 * ata_host_alloc - allocate and init basic ATA host resources
5380 * @dev: generic device this host is associated with
5381 * @max_ports: maximum number of ATA ports associated with this host
5383 * Allocate and initialize basic ATA host resources. LLD calls
5384 * this function to allocate a host, initializes it fully and
5385 * attaches it using ata_host_register().
5387 * @max_ports ports are allocated and host->n_ports is
5388 * initialized to @max_ports. The caller is allowed to decrease
5389 * host->n_ports before calling ata_host_register(). The unused
5390 * ports will be automatically freed on registration.
5393 * Allocate ATA host on success, NULL on failure.
5396 * Inherited from calling layer (may sleep).
5398 struct ata_host
*ata_host_alloc(struct device
*dev
, int max_ports
)
5400 struct ata_host
*host
;
5405 /* alloc a container for our list of ATA ports (buses) */
5406 sz
= sizeof(struct ata_host
) + (max_ports
+ 1) * sizeof(void *);
5407 host
= kzalloc(sz
, GFP_KERNEL
);
5411 if (!devres_open_group(dev
, NULL
, GFP_KERNEL
))
5414 dr
= devres_alloc(ata_devres_release
, 0, GFP_KERNEL
);
5418 devres_add(dev
, dr
);
5419 dev_set_drvdata(dev
, host
);
5421 spin_lock_init(&host
->lock
);
5422 mutex_init(&host
->eh_mutex
);
5424 host
->n_ports
= max_ports
;
5425 kref_init(&host
->kref
);
5427 /* allocate ports bound to this host */
5428 for (i
= 0; i
< max_ports
; i
++) {
5429 struct ata_port
*ap
;
5431 ap
= ata_port_alloc(host
);
5436 host
->ports
[i
] = ap
;
5439 devres_remove_group(dev
, NULL
);
5443 devres_release_group(dev
, NULL
);
5448 EXPORT_SYMBOL_GPL(ata_host_alloc
);
5451 * ata_host_alloc_pinfo - alloc host and init with port_info array
5452 * @dev: generic device this host is associated with
5453 * @ppi: array of ATA port_info to initialize host with
5454 * @n_ports: number of ATA ports attached to this host
5456 * Allocate ATA host and initialize with info from @ppi. If NULL
5457 * terminated, @ppi may contain fewer entries than @n_ports. The
5458 * last entry will be used for the remaining ports.
5461 * Allocate ATA host on success, NULL on failure.
5464 * Inherited from calling layer (may sleep).
5466 struct ata_host
*ata_host_alloc_pinfo(struct device
*dev
,
5467 const struct ata_port_info
* const * ppi
,
5470 const struct ata_port_info
*pi
= &ata_dummy_port_info
;
5471 struct ata_host
*host
;
5474 host
= ata_host_alloc(dev
, n_ports
);
5478 for (i
= 0, j
= 0; i
< host
->n_ports
; i
++) {
5479 struct ata_port
*ap
= host
->ports
[i
];
5484 ap
->pio_mask
= pi
->pio_mask
;
5485 ap
->mwdma_mask
= pi
->mwdma_mask
;
5486 ap
->udma_mask
= pi
->udma_mask
;
5487 ap
->flags
|= pi
->flags
;
5488 ap
->link
.flags
|= pi
->link_flags
;
5489 ap
->ops
= pi
->port_ops
;
5491 if (!host
->ops
&& (pi
->port_ops
!= &ata_dummy_port_ops
))
5492 host
->ops
= pi
->port_ops
;
5497 EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo
);
5499 static void ata_host_stop(struct device
*gendev
, void *res
)
5501 struct ata_host
*host
= dev_get_drvdata(gendev
);
5504 WARN_ON(!(host
->flags
& ATA_HOST_STARTED
));
5506 for (i
= 0; i
< host
->n_ports
; i
++) {
5507 struct ata_port
*ap
= host
->ports
[i
];
5509 if (ap
->ops
->port_stop
)
5510 ap
->ops
->port_stop(ap
);
5513 if (host
->ops
->host_stop
)
5514 host
->ops
->host_stop(host
);
5518 * ata_finalize_port_ops - finalize ata_port_operations
5519 * @ops: ata_port_operations to finalize
5521 * An ata_port_operations can inherit from another ops and that
5522 * ops can again inherit from another. This can go on as many
5523 * times as necessary as long as there is no loop in the
5524 * inheritance chain.
5526 * Ops tables are finalized when the host is started. NULL or
5527 * unspecified entries are inherited from the closet ancestor
5528 * which has the method and the entry is populated with it.
5529 * After finalization, the ops table directly points to all the
5530 * methods and ->inherits is no longer necessary and cleared.
5532 * Using ATA_OP_NULL, inheriting ops can force a method to NULL.
5537 static void ata_finalize_port_ops(struct ata_port_operations
*ops
)
5539 static DEFINE_SPINLOCK(lock
);
5540 const struct ata_port_operations
*cur
;
5541 void **begin
= (void **)ops
;
5542 void **end
= (void **)&ops
->inherits
;
5545 if (!ops
|| !ops
->inherits
)
5550 for (cur
= ops
->inherits
; cur
; cur
= cur
->inherits
) {
5551 void **inherit
= (void **)cur
;
5553 for (pp
= begin
; pp
< end
; pp
++, inherit
++)
5558 for (pp
= begin
; pp
< end
; pp
++)
5562 ops
->inherits
= NULL
;
5568 * ata_host_start - start and freeze ports of an ATA host
5569 * @host: ATA host to start ports for
5571 * Start and then freeze ports of @host. Started status is
5572 * recorded in host->flags, so this function can be called
5573 * multiple times. Ports are guaranteed to get started only
5574 * once. If host->ops is not initialized yet, it is set to the
5575 * first non-dummy port ops.
5578 * Inherited from calling layer (may sleep).
5581 * 0 if all ports are started successfully, -errno otherwise.
5583 int ata_host_start(struct ata_host
*host
)
5586 void *start_dr
= NULL
;
5589 if (host
->flags
& ATA_HOST_STARTED
)
5592 ata_finalize_port_ops(host
->ops
);
5594 for (i
= 0; i
< host
->n_ports
; i
++) {
5595 struct ata_port
*ap
= host
->ports
[i
];
5597 ata_finalize_port_ops(ap
->ops
);
5599 if (!host
->ops
&& !ata_port_is_dummy(ap
))
5600 host
->ops
= ap
->ops
;
5602 if (ap
->ops
->port_stop
)
5606 if (host
->ops
&& host
->ops
->host_stop
)
5610 start_dr
= devres_alloc(ata_host_stop
, 0, GFP_KERNEL
);
5615 for (i
= 0; i
< host
->n_ports
; i
++) {
5616 struct ata_port
*ap
= host
->ports
[i
];
5618 if (ap
->ops
->port_start
) {
5619 rc
= ap
->ops
->port_start(ap
);
5623 "failed to start port %d (errno=%d)\n",
5628 ata_eh_freeze_port(ap
);
5632 devres_add(host
->dev
, start_dr
);
5633 host
->flags
|= ATA_HOST_STARTED
;
5638 struct ata_port
*ap
= host
->ports
[i
];
5640 if (ap
->ops
->port_stop
)
5641 ap
->ops
->port_stop(ap
);
5643 devres_free(start_dr
);
5646 EXPORT_SYMBOL_GPL(ata_host_start
);
5649 * ata_host_init - Initialize a host struct for sas (ipr, libsas)
5650 * @host: host to initialize
5651 * @dev: device host is attached to
5655 void ata_host_init(struct ata_host
*host
, struct device
*dev
,
5656 struct ata_port_operations
*ops
)
5658 spin_lock_init(&host
->lock
);
5659 mutex_init(&host
->eh_mutex
);
5660 host
->n_tags
= ATA_MAX_QUEUE
;
5663 kref_init(&host
->kref
);
5665 EXPORT_SYMBOL_GPL(ata_host_init
);
5667 void __ata_port_probe(struct ata_port
*ap
)
5669 struct ata_eh_info
*ehi
= &ap
->link
.eh_info
;
5670 unsigned long flags
;
5672 /* kick EH for boot probing */
5673 spin_lock_irqsave(ap
->lock
, flags
);
5675 ehi
->probe_mask
|= ATA_ALL_DEVICES
;
5676 ehi
->action
|= ATA_EH_RESET
;
5677 ehi
->flags
|= ATA_EHI_NO_AUTOPSY
| ATA_EHI_QUIET
;
5679 ap
->pflags
&= ~ATA_PFLAG_INITIALIZING
;
5680 ap
->pflags
|= ATA_PFLAG_LOADING
;
5681 ata_port_schedule_eh(ap
);
5683 spin_unlock_irqrestore(ap
->lock
, flags
);
5686 int ata_port_probe(struct ata_port
*ap
)
5690 if (ap
->ops
->error_handler
) {
5691 __ata_port_probe(ap
);
5692 ata_port_wait_eh(ap
);
5694 rc
= ata_bus_probe(ap
);
5700 static void async_port_probe(void *data
, async_cookie_t cookie
)
5702 struct ata_port
*ap
= data
;
5705 * If we're not allowed to scan this host in parallel,
5706 * we need to wait until all previous scans have completed
5707 * before going further.
5708 * Jeff Garzik says this is only within a controller, so we
5709 * don't need to wait for port 0, only for later ports.
5711 if (!(ap
->host
->flags
& ATA_HOST_PARALLEL_SCAN
) && ap
->port_no
!= 0)
5712 async_synchronize_cookie(cookie
);
5714 (void)ata_port_probe(ap
);
5716 /* in order to keep device order, we need to synchronize at this point */
5717 async_synchronize_cookie(cookie
);
5719 ata_scsi_scan_host(ap
, 1);
5723 * ata_host_register - register initialized ATA host
5724 * @host: ATA host to register
5725 * @sht: template for SCSI host
5727 * Register initialized ATA host. @host is allocated using
5728 * ata_host_alloc() and fully initialized by LLD. This function
5729 * starts ports, registers @host with ATA and SCSI layers and
5730 * probe registered devices.
5733 * Inherited from calling layer (may sleep).
5736 * 0 on success, -errno otherwise.
5738 int ata_host_register(struct ata_host
*host
, struct scsi_host_template
*sht
)
5742 host
->n_tags
= clamp(sht
->can_queue
, 1, ATA_MAX_QUEUE
);
5744 /* host must have been started */
5745 if (!(host
->flags
& ATA_HOST_STARTED
)) {
5746 dev_err(host
->dev
, "BUG: trying to register unstarted host\n");
5751 /* Blow away unused ports. This happens when LLD can't
5752 * determine the exact number of ports to allocate at
5755 for (i
= host
->n_ports
; host
->ports
[i
]; i
++)
5756 kfree(host
->ports
[i
]);
5758 /* give ports names and add SCSI hosts */
5759 for (i
= 0; i
< host
->n_ports
; i
++) {
5760 host
->ports
[i
]->print_id
= atomic_inc_return(&ata_print_id
);
5761 host
->ports
[i
]->local_port_no
= i
+ 1;
5764 /* Create associated sysfs transport objects */
5765 for (i
= 0; i
< host
->n_ports
; i
++) {
5766 rc
= ata_tport_add(host
->dev
,host
->ports
[i
]);
5772 rc
= ata_scsi_add_hosts(host
, sht
);
5776 /* set cable, sata_spd_limit and report */
5777 for (i
= 0; i
< host
->n_ports
; i
++) {
5778 struct ata_port
*ap
= host
->ports
[i
];
5779 unsigned int xfer_mask
;
5781 /* set SATA cable type if still unset */
5782 if (ap
->cbl
== ATA_CBL_NONE
&& (ap
->flags
& ATA_FLAG_SATA
))
5783 ap
->cbl
= ATA_CBL_SATA
;
5785 /* init sata_spd_limit to the current value */
5786 sata_link_init_spd(&ap
->link
);
5788 sata_link_init_spd(ap
->slave_link
);
5790 /* print per-port info to dmesg */
5791 xfer_mask
= ata_pack_xfermask(ap
->pio_mask
, ap
->mwdma_mask
,
5794 if (!ata_port_is_dummy(ap
)) {
5795 ata_port_info(ap
, "%cATA max %s %s\n",
5796 (ap
->flags
& ATA_FLAG_SATA
) ? 'S' : 'P',
5797 ata_mode_string(xfer_mask
),
5798 ap
->link
.eh_info
.desc
);
5799 ata_ehi_clear_desc(&ap
->link
.eh_info
);
5801 ata_port_info(ap
, "DUMMY\n");
5804 /* perform each probe asynchronously */
5805 for (i
= 0; i
< host
->n_ports
; i
++) {
5806 struct ata_port
*ap
= host
->ports
[i
];
5807 ap
->cookie
= async_schedule(async_port_probe
, ap
);
5814 ata_tport_delete(host
->ports
[i
]);
5819 EXPORT_SYMBOL_GPL(ata_host_register
);
5822 * ata_host_activate - start host, request IRQ and register it
5823 * @host: target ATA host
5824 * @irq: IRQ to request
5825 * @irq_handler: irq_handler used when requesting IRQ
5826 * @irq_flags: irq_flags used when requesting IRQ
5827 * @sht: scsi_host_template to use when registering the host
5829 * After allocating an ATA host and initializing it, most libata
5830 * LLDs perform three steps to activate the host - start host,
5831 * request IRQ and register it. This helper takes necessary
5832 * arguments and performs the three steps in one go.
5834 * An invalid IRQ skips the IRQ registration and expects the host to
5835 * have set polling mode on the port. In this case, @irq_handler
5839 * Inherited from calling layer (may sleep).
5842 * 0 on success, -errno otherwise.
5844 int ata_host_activate(struct ata_host
*host
, int irq
,
5845 irq_handler_t irq_handler
, unsigned long irq_flags
,
5846 struct scsi_host_template
*sht
)
5851 rc
= ata_host_start(host
);
5855 /* Special case for polling mode */
5857 WARN_ON(irq_handler
);
5858 return ata_host_register(host
, sht
);
5861 irq_desc
= devm_kasprintf(host
->dev
, GFP_KERNEL
, "%s[%s]",
5862 dev_driver_string(host
->dev
),
5863 dev_name(host
->dev
));
5867 rc
= devm_request_irq(host
->dev
, irq
, irq_handler
, irq_flags
,
5872 for (i
= 0; i
< host
->n_ports
; i
++)
5873 ata_port_desc(host
->ports
[i
], "irq %d", irq
);
5875 rc
= ata_host_register(host
, sht
);
5876 /* if failed, just free the IRQ and leave ports alone */
5878 devm_free_irq(host
->dev
, irq
, host
);
5882 EXPORT_SYMBOL_GPL(ata_host_activate
);
5885 * ata_port_detach - Detach ATA port in preparation of device removal
5886 * @ap: ATA port to be detached
5888 * Detach all ATA devices and the associated SCSI devices of @ap;
5889 * then, remove the associated SCSI host. @ap is guaranteed to
5890 * be quiescent on return from this function.
5893 * Kernel thread context (may sleep).
5895 static void ata_port_detach(struct ata_port
*ap
)
5897 unsigned long flags
;
5898 struct ata_link
*link
;
5899 struct ata_device
*dev
;
5901 if (!ap
->ops
->error_handler
)
5904 /* tell EH we're leaving & flush EH */
5905 spin_lock_irqsave(ap
->lock
, flags
);
5906 ap
->pflags
|= ATA_PFLAG_UNLOADING
;
5907 ata_port_schedule_eh(ap
);
5908 spin_unlock_irqrestore(ap
->lock
, flags
);
5910 /* wait till EH commits suicide */
5911 ata_port_wait_eh(ap
);
5913 /* it better be dead now */
5914 WARN_ON(!(ap
->pflags
& ATA_PFLAG_UNLOADED
));
5916 cancel_delayed_work_sync(&ap
->hotplug_task
);
5919 /* clean up zpodd on port removal */
5920 ata_for_each_link(link
, ap
, HOST_FIRST
) {
5921 ata_for_each_dev(dev
, link
, ALL
) {
5922 if (zpodd_dev_enabled(dev
))
5928 for (i
= 0; i
< SATA_PMP_MAX_PORTS
; i
++)
5929 ata_tlink_delete(&ap
->pmp_link
[i
]);
5931 /* remove the associated SCSI host */
5932 scsi_remove_host(ap
->scsi_host
);
5933 ata_tport_delete(ap
);
5937 * ata_host_detach - Detach all ports of an ATA host
5938 * @host: Host to detach
5940 * Detach all ports of @host.
5943 * Kernel thread context (may sleep).
5945 void ata_host_detach(struct ata_host
*host
)
5949 for (i
= 0; i
< host
->n_ports
; i
++) {
5950 /* Ensure ata_port probe has completed */
5951 async_synchronize_cookie(host
->ports
[i
]->cookie
+ 1);
5952 ata_port_detach(host
->ports
[i
]);
5955 /* the host is dead now, dissociate ACPI */
5956 ata_acpi_dissociate(host
);
5958 EXPORT_SYMBOL_GPL(ata_host_detach
);
5963 * ata_pci_remove_one - PCI layer callback for device removal
5964 * @pdev: PCI device that was removed
5966 * PCI layer indicates to libata via this hook that hot-unplug or
5967 * module unload event has occurred. Detach all ports. Resource
5968 * release is handled via devres.
5971 * Inherited from PCI layer (may sleep).
5973 void ata_pci_remove_one(struct pci_dev
*pdev
)
5975 struct ata_host
*host
= pci_get_drvdata(pdev
);
5977 ata_host_detach(host
);
5979 EXPORT_SYMBOL_GPL(ata_pci_remove_one
);
5981 void ata_pci_shutdown_one(struct pci_dev
*pdev
)
5983 struct ata_host
*host
= pci_get_drvdata(pdev
);
5986 for (i
= 0; i
< host
->n_ports
; i
++) {
5987 struct ata_port
*ap
= host
->ports
[i
];
5989 ap
->pflags
|= ATA_PFLAG_FROZEN
;
5991 /* Disable port interrupts */
5992 if (ap
->ops
->freeze
)
5993 ap
->ops
->freeze(ap
);
5995 /* Stop the port DMA engines */
5996 if (ap
->ops
->port_stop
)
5997 ap
->ops
->port_stop(ap
);
6000 EXPORT_SYMBOL_GPL(ata_pci_shutdown_one
);
6002 /* move to PCI subsystem */
6003 int pci_test_config_bits(struct pci_dev
*pdev
, const struct pci_bits
*bits
)
6005 unsigned long tmp
= 0;
6007 switch (bits
->width
) {
6010 pci_read_config_byte(pdev
, bits
->reg
, &tmp8
);
6016 pci_read_config_word(pdev
, bits
->reg
, &tmp16
);
6022 pci_read_config_dword(pdev
, bits
->reg
, &tmp32
);
6033 return (tmp
== bits
->val
) ? 1 : 0;
6035 EXPORT_SYMBOL_GPL(pci_test_config_bits
);
6038 void ata_pci_device_do_suspend(struct pci_dev
*pdev
, pm_message_t mesg
)
6040 pci_save_state(pdev
);
6041 pci_disable_device(pdev
);
6043 if (mesg
.event
& PM_EVENT_SLEEP
)
6044 pci_set_power_state(pdev
, PCI_D3hot
);
6046 EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend
);
6048 int ata_pci_device_do_resume(struct pci_dev
*pdev
)
6052 pci_set_power_state(pdev
, PCI_D0
);
6053 pci_restore_state(pdev
);
6055 rc
= pcim_enable_device(pdev
);
6058 "failed to enable device after resume (%d)\n", rc
);
6062 pci_set_master(pdev
);
6065 EXPORT_SYMBOL_GPL(ata_pci_device_do_resume
);
6067 int ata_pci_device_suspend(struct pci_dev
*pdev
, pm_message_t mesg
)
6069 struct ata_host
*host
= pci_get_drvdata(pdev
);
6071 ata_host_suspend(host
, mesg
);
6073 ata_pci_device_do_suspend(pdev
, mesg
);
6077 EXPORT_SYMBOL_GPL(ata_pci_device_suspend
);
6079 int ata_pci_device_resume(struct pci_dev
*pdev
)
6081 struct ata_host
*host
= pci_get_drvdata(pdev
);
6084 rc
= ata_pci_device_do_resume(pdev
);
6086 ata_host_resume(host
);
6089 EXPORT_SYMBOL_GPL(ata_pci_device_resume
);
6090 #endif /* CONFIG_PM */
6091 #endif /* CONFIG_PCI */
6094 * ata_platform_remove_one - Platform layer callback for device removal
6095 * @pdev: Platform device that was removed
6097 * Platform layer indicates to libata via this hook that hot-unplug or
6098 * module unload event has occurred. Detach all ports. Resource
6099 * release is handled via devres.
6102 * Inherited from platform layer (may sleep).
6104 int ata_platform_remove_one(struct platform_device
*pdev
)
6106 struct ata_host
*host
= platform_get_drvdata(pdev
);
6108 ata_host_detach(host
);
6112 EXPORT_SYMBOL_GPL(ata_platform_remove_one
);
6114 #ifdef CONFIG_ATA_FORCE
6116 #define force_cbl(name, flag) \
6117 { #name, .cbl = (flag) }
6119 #define force_spd_limit(spd, val) \
6120 { #spd, .spd_limit = (val) }
6122 #define force_xfer(mode, shift) \
6123 { #mode, .xfer_mask = (1UL << (shift)) }
6125 #define force_lflag_on(name, flags) \
6126 { #name, .lflags_on = (flags) }
6128 #define force_lflag_onoff(name, flags) \
6129 { "no" #name, .lflags_on = (flags) }, \
6130 { #name, .lflags_off = (flags) }
6132 #define force_horkage_on(name, flag) \
6133 { #name, .horkage_on = (flag) }
6135 #define force_horkage_onoff(name, flag) \
6136 { "no" #name, .horkage_on = (flag) }, \
6137 { #name, .horkage_off = (flag) }
6139 static const struct ata_force_param force_tbl
[] __initconst
= {
6140 force_cbl(40c
, ATA_CBL_PATA40
),
6141 force_cbl(80c
, ATA_CBL_PATA80
),
6142 force_cbl(short40c
, ATA_CBL_PATA40_SHORT
),
6143 force_cbl(unk
, ATA_CBL_PATA_UNK
),
6144 force_cbl(ign
, ATA_CBL_PATA_IGN
),
6145 force_cbl(sata
, ATA_CBL_SATA
),
6147 force_spd_limit(1.5Gbps
, 1),
6148 force_spd_limit(3.0Gbps
, 2),
6150 force_xfer(pio0
, ATA_SHIFT_PIO
+ 0),
6151 force_xfer(pio1
, ATA_SHIFT_PIO
+ 1),
6152 force_xfer(pio2
, ATA_SHIFT_PIO
+ 2),
6153 force_xfer(pio3
, ATA_SHIFT_PIO
+ 3),
6154 force_xfer(pio4
, ATA_SHIFT_PIO
+ 4),
6155 force_xfer(pio5
, ATA_SHIFT_PIO
+ 5),
6156 force_xfer(pio6
, ATA_SHIFT_PIO
+ 6),
6157 force_xfer(mwdma0
, ATA_SHIFT_MWDMA
+ 0),
6158 force_xfer(mwdma1
, ATA_SHIFT_MWDMA
+ 1),
6159 force_xfer(mwdma2
, ATA_SHIFT_MWDMA
+ 2),
6160 force_xfer(mwdma3
, ATA_SHIFT_MWDMA
+ 3),
6161 force_xfer(mwdma4
, ATA_SHIFT_MWDMA
+ 4),
6162 force_xfer(udma0
, ATA_SHIFT_UDMA
+ 0),
6163 force_xfer(udma16
, ATA_SHIFT_UDMA
+ 0),
6164 force_xfer(udma
/16, ATA_SHIFT_UDMA
+ 0),
6165 force_xfer(udma1
, ATA_SHIFT_UDMA
+ 1),
6166 force_xfer(udma25
, ATA_SHIFT_UDMA
+ 1),
6167 force_xfer(udma
/25, ATA_SHIFT_UDMA
+ 1),
6168 force_xfer(udma2
, ATA_SHIFT_UDMA
+ 2),
6169 force_xfer(udma33
, ATA_SHIFT_UDMA
+ 2),
6170 force_xfer(udma
/33, ATA_SHIFT_UDMA
+ 2),
6171 force_xfer(udma3
, ATA_SHIFT_UDMA
+ 3),
6172 force_xfer(udma44
, ATA_SHIFT_UDMA
+ 3),
6173 force_xfer(udma
/44, ATA_SHIFT_UDMA
+ 3),
6174 force_xfer(udma4
, ATA_SHIFT_UDMA
+ 4),
6175 force_xfer(udma66
, ATA_SHIFT_UDMA
+ 4),
6176 force_xfer(udma
/66, ATA_SHIFT_UDMA
+ 4),
6177 force_xfer(udma5
, ATA_SHIFT_UDMA
+ 5),
6178 force_xfer(udma100
, ATA_SHIFT_UDMA
+ 5),
6179 force_xfer(udma
/100, ATA_SHIFT_UDMA
+ 5),
6180 force_xfer(udma6
, ATA_SHIFT_UDMA
+ 6),
6181 force_xfer(udma133
, ATA_SHIFT_UDMA
+ 6),
6182 force_xfer(udma
/133, ATA_SHIFT_UDMA
+ 6),
6183 force_xfer(udma7
, ATA_SHIFT_UDMA
+ 7),
6185 force_lflag_on(nohrst
, ATA_LFLAG_NO_HRST
),
6186 force_lflag_on(nosrst
, ATA_LFLAG_NO_SRST
),
6187 force_lflag_on(norst
, ATA_LFLAG_NO_HRST
| ATA_LFLAG_NO_SRST
),
6188 force_lflag_on(rstonce
, ATA_LFLAG_RST_ONCE
),
6189 force_lflag_onoff(dbdelay
, ATA_LFLAG_NO_DEBOUNCE_DELAY
),
6191 force_horkage_onoff(ncq
, ATA_HORKAGE_NONCQ
),
6192 force_horkage_onoff(ncqtrim
, ATA_HORKAGE_NO_NCQ_TRIM
),
6193 force_horkage_onoff(ncqati
, ATA_HORKAGE_NO_NCQ_ON_ATI
),
6195 force_horkage_onoff(trim
, ATA_HORKAGE_NOTRIM
),
6196 force_horkage_on(trim_zero
, ATA_HORKAGE_ZERO_AFTER_TRIM
),
6197 force_horkage_on(max_trim_128m
, ATA_HORKAGE_MAX_TRIM_128M
),
6199 force_horkage_onoff(dma
, ATA_HORKAGE_NODMA
),
6200 force_horkage_on(atapi_dmadir
, ATA_HORKAGE_ATAPI_DMADIR
),
6201 force_horkage_on(atapi_mod16_dma
, ATA_HORKAGE_ATAPI_MOD16_DMA
),
6203 force_horkage_onoff(dmalog
, ATA_HORKAGE_NO_DMA_LOG
),
6204 force_horkage_onoff(iddevlog
, ATA_HORKAGE_NO_ID_DEV_LOG
),
6205 force_horkage_onoff(logdir
, ATA_HORKAGE_NO_LOG_DIR
),
6207 force_horkage_on(max_sec_128
, ATA_HORKAGE_MAX_SEC_128
),
6208 force_horkage_on(max_sec_1024
, ATA_HORKAGE_MAX_SEC_1024
),
6209 force_horkage_on(max_sec_lba48
, ATA_HORKAGE_MAX_SEC_LBA48
),
6211 force_horkage_onoff(lpm
, ATA_HORKAGE_NOLPM
),
6212 force_horkage_onoff(setxfer
, ATA_HORKAGE_NOSETXFER
),
6213 force_horkage_on(dump_id
, ATA_HORKAGE_DUMP_ID
),
6215 force_horkage_on(disable
, ATA_HORKAGE_DISABLE
),
6218 static int __init
ata_parse_force_one(char **cur
,
6219 struct ata_force_ent
*force_ent
,
6220 const char **reason
)
6222 char *start
= *cur
, *p
= *cur
;
6223 char *id
, *val
, *endp
;
6224 const struct ata_force_param
*match_fp
= NULL
;
6225 int nr_matches
= 0, i
;
6227 /* find where this param ends and update *cur */
6228 while (*p
!= '\0' && *p
!= ',')
6239 p
= strchr(start
, ':');
6241 val
= strstrip(start
);
6246 id
= strstrip(start
);
6247 val
= strstrip(p
+ 1);
6250 p
= strchr(id
, '.');
6253 force_ent
->device
= simple_strtoul(p
, &endp
, 10);
6254 if (p
== endp
|| *endp
!= '\0') {
6255 *reason
= "invalid device";
6260 force_ent
->port
= simple_strtoul(id
, &endp
, 10);
6261 if (id
== endp
|| *endp
!= '\0') {
6262 *reason
= "invalid port/link";
6267 /* parse val, allow shortcuts so that both 1.5 and 1.5Gbps work */
6268 for (i
= 0; i
< ARRAY_SIZE(force_tbl
); i
++) {
6269 const struct ata_force_param
*fp
= &force_tbl
[i
];
6271 if (strncasecmp(val
, fp
->name
, strlen(val
)))
6277 if (strcasecmp(val
, fp
->name
) == 0) {
6284 *reason
= "unknown value";
6287 if (nr_matches
> 1) {
6288 *reason
= "ambiguous value";
6292 force_ent
->param
= *match_fp
;
6297 static void __init
ata_parse_force_param(void)
6299 int idx
= 0, size
= 1;
6300 int last_port
= -1, last_device
= -1;
6301 char *p
, *cur
, *next
;
6303 /* Calculate maximum number of params and allocate ata_force_tbl */
6304 for (p
= ata_force_param_buf
; *p
; p
++)
6308 ata_force_tbl
= kcalloc(size
, sizeof(ata_force_tbl
[0]), GFP_KERNEL
);
6309 if (!ata_force_tbl
) {
6310 printk(KERN_WARNING
"ata: failed to extend force table, "
6311 "libata.force ignored\n");
6315 /* parse and populate the table */
6316 for (cur
= ata_force_param_buf
; *cur
!= '\0'; cur
= next
) {
6317 const char *reason
= "";
6318 struct ata_force_ent te
= { .port
= -1, .device
= -1 };
6321 if (ata_parse_force_one(&next
, &te
, &reason
)) {
6322 printk(KERN_WARNING
"ata: failed to parse force "
6323 "parameter \"%s\" (%s)\n",
6328 if (te
.port
== -1) {
6329 te
.port
= last_port
;
6330 te
.device
= last_device
;
6333 ata_force_tbl
[idx
++] = te
;
6335 last_port
= te
.port
;
6336 last_device
= te
.device
;
6339 ata_force_tbl_size
= idx
;
6342 static void ata_free_force_param(void)
6344 kfree(ata_force_tbl
);
6347 static inline void ata_parse_force_param(void) { }
6348 static inline void ata_free_force_param(void) { }
6351 static int __init
ata_init(void)
6355 ata_parse_force_param();
6357 rc
= ata_sff_init();
6359 ata_free_force_param();
6363 libata_transport_init();
6364 ata_scsi_transport_template
= ata_attach_transport();
6365 if (!ata_scsi_transport_template
) {
6371 printk(KERN_DEBUG
"libata version " DRV_VERSION
" loaded.\n");
6378 static void __exit
ata_exit(void)
6380 ata_release_transport(ata_scsi_transport_template
);
6381 libata_transport_exit();
6383 ata_free_force_param();
6386 subsys_initcall(ata_init
);
6387 module_exit(ata_exit
);
6389 static DEFINE_RATELIMIT_STATE(ratelimit
, HZ
/ 5, 1);
6391 int ata_ratelimit(void)
6393 return __ratelimit(&ratelimit
);
6395 EXPORT_SYMBOL_GPL(ata_ratelimit
);
6398 * ata_msleep - ATA EH owner aware msleep
6399 * @ap: ATA port to attribute the sleep to
6400 * @msecs: duration to sleep in milliseconds
6402 * Sleeps @msecs. If the current task is owner of @ap's EH, the
6403 * ownership is released before going to sleep and reacquired
6404 * after the sleep is complete. IOW, other ports sharing the
6405 * @ap->host will be allowed to own the EH while this task is
6411 void ata_msleep(struct ata_port
*ap
, unsigned int msecs
)
6413 bool owns_eh
= ap
&& ap
->host
->eh_owner
== current
;
6419 unsigned long usecs
= msecs
* USEC_PER_MSEC
;
6420 usleep_range(usecs
, usecs
+ 50);
6428 EXPORT_SYMBOL_GPL(ata_msleep
);
6431 * ata_wait_register - wait until register value changes
6432 * @ap: ATA port to wait register for, can be NULL
6433 * @reg: IO-mapped register
6434 * @mask: Mask to apply to read register value
6435 * @val: Wait condition
6436 * @interval: polling interval in milliseconds
6437 * @timeout: timeout in milliseconds
6439 * Waiting for some bits of register to change is a common
6440 * operation for ATA controllers. This function reads 32bit LE
6441 * IO-mapped register @reg and tests for the following condition.
6443 * (*@reg & mask) != val
6445 * If the condition is met, it returns; otherwise, the process is
6446 * repeated after @interval_msec until timeout.
6449 * Kernel thread context (may sleep)
6452 * The final register value.
6454 u32
ata_wait_register(struct ata_port
*ap
, void __iomem
*reg
, u32 mask
, u32 val
,
6455 unsigned long interval
, unsigned long timeout
)
6457 unsigned long deadline
;
6460 tmp
= ioread32(reg
);
6462 /* Calculate timeout _after_ the first read to make sure
6463 * preceding writes reach the controller before starting to
6464 * eat away the timeout.
6466 deadline
= ata_deadline(jiffies
, timeout
);
6468 while ((tmp
& mask
) == val
&& time_before(jiffies
, deadline
)) {
6469 ata_msleep(ap
, interval
);
6470 tmp
= ioread32(reg
);
6475 EXPORT_SYMBOL_GPL(ata_wait_register
);
6480 static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd
*qc
)
6482 return AC_ERR_SYSTEM
;
6485 static void ata_dummy_error_handler(struct ata_port
*ap
)
6490 struct ata_port_operations ata_dummy_port_ops
= {
6491 .qc_prep
= ata_noop_qc_prep
,
6492 .qc_issue
= ata_dummy_qc_issue
,
6493 .error_handler
= ata_dummy_error_handler
,
6494 .sched_eh
= ata_std_sched_eh
,
6495 .end_eh
= ata_std_end_eh
,
6497 EXPORT_SYMBOL_GPL(ata_dummy_port_ops
);
6499 const struct ata_port_info ata_dummy_port_info
= {
6500 .port_ops
= &ata_dummy_port_ops
,
6502 EXPORT_SYMBOL_GPL(ata_dummy_port_info
);
6504 void ata_print_version(const struct device
*dev
, const char *version
)
6506 dev_printk(KERN_DEBUG
, dev
, "version %s\n", version
);
6508 EXPORT_SYMBOL(ata_print_version
);
6510 EXPORT_TRACEPOINT_SYMBOL_GPL(ata_tf_load
);
6511 EXPORT_TRACEPOINT_SYMBOL_GPL(ata_exec_command
);
6512 EXPORT_TRACEPOINT_SYMBOL_GPL(ata_bmdma_setup
);
6513 EXPORT_TRACEPOINT_SYMBOL_GPL(ata_bmdma_start
);
6514 EXPORT_TRACEPOINT_SYMBOL_GPL(ata_bmdma_status
);