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 long xfer_mask
;
97 unsigned int horkage_on
;
98 unsigned int horkage_off
;
102 struct ata_force_ent
{
105 struct ata_force_param param
;
108 static struct ata_force_ent
*ata_force_tbl
;
109 static int ata_force_tbl_size
;
111 static char ata_force_param_buf
[COMMAND_LINE_SIZE
] __initdata
;
112 /* param_buf is thrown away after initialization, disallow read */
113 module_param_string(force
, ata_force_param_buf
, sizeof(ata_force_param_buf
), 0);
114 MODULE_PARM_DESC(force
, "Force ATA configurations including cable type, link speed and transfer mode (see Documentation/admin-guide/kernel-parameters.rst for details)");
117 static int atapi_enabled
= 1;
118 module_param(atapi_enabled
, int, 0444);
119 MODULE_PARM_DESC(atapi_enabled
, "Enable discovery of ATAPI devices (0=off, 1=on [default])");
121 static int atapi_dmadir
= 0;
122 module_param(atapi_dmadir
, int, 0444);
123 MODULE_PARM_DESC(atapi_dmadir
, "Enable ATAPI DMADIR bridge support (0=off [default], 1=on)");
125 int atapi_passthru16
= 1;
126 module_param(atapi_passthru16
, int, 0444);
127 MODULE_PARM_DESC(atapi_passthru16
, "Enable ATA_16 passthru for ATAPI devices (0=off, 1=on [default])");
130 module_param_named(fua
, libata_fua
, int, 0444);
131 MODULE_PARM_DESC(fua
, "FUA support (0=off [default], 1=on)");
133 static int ata_ignore_hpa
;
134 module_param_named(ignore_hpa
, ata_ignore_hpa
, int, 0644);
135 MODULE_PARM_DESC(ignore_hpa
, "Ignore HPA limit (0=keep BIOS limits, 1=ignore limits, using full disk)");
137 static int libata_dma_mask
= ATA_DMA_MASK_ATA
|ATA_DMA_MASK_ATAPI
|ATA_DMA_MASK_CFA
;
138 module_param_named(dma
, libata_dma_mask
, int, 0444);
139 MODULE_PARM_DESC(dma
, "DMA enable/disable (0x1==ATA, 0x2==ATAPI, 0x4==CF)");
141 static int ata_probe_timeout
;
142 module_param(ata_probe_timeout
, int, 0444);
143 MODULE_PARM_DESC(ata_probe_timeout
, "Set ATA probing timeout (seconds)");
145 int libata_noacpi
= 0;
146 module_param_named(noacpi
, libata_noacpi
, int, 0444);
147 MODULE_PARM_DESC(noacpi
, "Disable the use of ACPI in probe/suspend/resume (0=off [default], 1=on)");
149 int libata_allow_tpm
= 0;
150 module_param_named(allow_tpm
, libata_allow_tpm
, int, 0444);
151 MODULE_PARM_DESC(allow_tpm
, "Permit the use of TPM commands (0=off [default], 1=on)");
154 module_param(atapi_an
, int, 0444);
155 MODULE_PARM_DESC(atapi_an
, "Enable ATAPI AN media presence notification (0=0ff [default], 1=on)");
157 MODULE_AUTHOR("Jeff Garzik");
158 MODULE_DESCRIPTION("Library module for ATA devices");
159 MODULE_LICENSE("GPL");
160 MODULE_VERSION(DRV_VERSION
);
163 static bool ata_sstatus_online(u32 sstatus
)
165 return (sstatus
& 0xf) == 0x3;
169 * ata_link_next - link iteration helper
170 * @link: the previous link, NULL to start
171 * @ap: ATA port containing links to iterate
172 * @mode: iteration mode, one of ATA_LITER_*
175 * Host lock or EH context.
178 * Pointer to the next link.
180 struct ata_link
*ata_link_next(struct ata_link
*link
, struct ata_port
*ap
,
181 enum ata_link_iter_mode mode
)
183 BUG_ON(mode
!= ATA_LITER_EDGE
&&
184 mode
!= ATA_LITER_PMP_FIRST
&& mode
!= ATA_LITER_HOST_FIRST
);
186 /* NULL link indicates start of iteration */
190 case ATA_LITER_PMP_FIRST
:
191 if (sata_pmp_attached(ap
))
194 case ATA_LITER_HOST_FIRST
:
198 /* we just iterated over the host link, what's next? */
199 if (link
== &ap
->link
)
201 case ATA_LITER_HOST_FIRST
:
202 if (sata_pmp_attached(ap
))
205 case ATA_LITER_PMP_FIRST
:
206 if (unlikely(ap
->slave_link
))
207 return ap
->slave_link
;
213 /* slave_link excludes PMP */
214 if (unlikely(link
== ap
->slave_link
))
217 /* we were over a PMP link */
218 if (++link
< ap
->pmp_link
+ ap
->nr_pmp_links
)
221 if (mode
== ATA_LITER_PMP_FIRST
)
226 EXPORT_SYMBOL_GPL(ata_link_next
);
229 * ata_dev_next - device iteration helper
230 * @dev: the previous device, NULL to start
231 * @link: ATA link containing devices to iterate
232 * @mode: iteration mode, one of ATA_DITER_*
235 * Host lock or EH context.
238 * Pointer to the next device.
240 struct ata_device
*ata_dev_next(struct ata_device
*dev
, struct ata_link
*link
,
241 enum ata_dev_iter_mode mode
)
243 BUG_ON(mode
!= ATA_DITER_ENABLED
&& mode
!= ATA_DITER_ENABLED_REVERSE
&&
244 mode
!= ATA_DITER_ALL
&& mode
!= ATA_DITER_ALL_REVERSE
);
246 /* NULL dev indicates start of iteration */
249 case ATA_DITER_ENABLED
:
253 case ATA_DITER_ENABLED_REVERSE
:
254 case ATA_DITER_ALL_REVERSE
:
255 dev
= link
->device
+ ata_link_max_devices(link
) - 1;
260 /* move to the next one */
262 case ATA_DITER_ENABLED
:
264 if (++dev
< link
->device
+ ata_link_max_devices(link
))
267 case ATA_DITER_ENABLED_REVERSE
:
268 case ATA_DITER_ALL_REVERSE
:
269 if (--dev
>= link
->device
)
275 if ((mode
== ATA_DITER_ENABLED
|| mode
== ATA_DITER_ENABLED_REVERSE
) &&
276 !ata_dev_enabled(dev
))
280 EXPORT_SYMBOL_GPL(ata_dev_next
);
283 * ata_dev_phys_link - find physical link for a device
284 * @dev: ATA device to look up physical link for
286 * Look up physical link which @dev is attached to. Note that
287 * this is different from @dev->link only when @dev is on slave
288 * link. For all other cases, it's the same as @dev->link.
294 * Pointer to the found physical link.
296 struct ata_link
*ata_dev_phys_link(struct ata_device
*dev
)
298 struct ata_port
*ap
= dev
->link
->ap
;
304 return ap
->slave_link
;
307 #ifdef CONFIG_ATA_FORCE
309 * ata_force_cbl - force cable type according to libata.force
310 * @ap: ATA port of interest
312 * Force cable type according to libata.force and whine about it.
313 * The last entry which has matching port number is used, so it
314 * can be specified as part of device force parameters. For
315 * example, both "a:40c,1.00:udma4" and "1.00:40c,udma4" have the
321 void ata_force_cbl(struct ata_port
*ap
)
325 for (i
= ata_force_tbl_size
- 1; i
>= 0; i
--) {
326 const struct ata_force_ent
*fe
= &ata_force_tbl
[i
];
328 if (fe
->port
!= -1 && fe
->port
!= ap
->print_id
)
331 if (fe
->param
.cbl
== ATA_CBL_NONE
)
334 ap
->cbl
= fe
->param
.cbl
;
335 ata_port_notice(ap
, "FORCE: cable set to %s\n", fe
->param
.name
);
341 * ata_force_link_limits - force link limits according to libata.force
342 * @link: ATA link of interest
344 * Force link flags and SATA spd limit according to libata.force
345 * and whine about it. When only the port part is specified
346 * (e.g. 1:), the limit applies to all links connected to both
347 * the host link and all fan-out ports connected via PMP. If the
348 * device part is specified as 0 (e.g. 1.00:), it specifies the
349 * first fan-out link not the host link. Device number 15 always
350 * points to the host link whether PMP is attached or not. If the
351 * controller has slave link, device number 16 points to it.
356 static void ata_force_link_limits(struct ata_link
*link
)
358 bool did_spd
= false;
359 int linkno
= link
->pmp
;
362 if (ata_is_host_link(link
))
365 for (i
= ata_force_tbl_size
- 1; i
>= 0; i
--) {
366 const struct ata_force_ent
*fe
= &ata_force_tbl
[i
];
368 if (fe
->port
!= -1 && fe
->port
!= link
->ap
->print_id
)
371 if (fe
->device
!= -1 && fe
->device
!= linkno
)
374 /* only honor the first spd limit */
375 if (!did_spd
&& fe
->param
.spd_limit
) {
376 link
->hw_sata_spd_limit
= (1 << fe
->param
.spd_limit
) - 1;
377 ata_link_notice(link
, "FORCE: PHY spd limit set to %s\n",
382 /* let lflags stack */
383 if (fe
->param
.lflags
) {
384 link
->flags
|= fe
->param
.lflags
;
385 ata_link_notice(link
,
386 "FORCE: link flag 0x%x forced -> 0x%x\n",
387 fe
->param
.lflags
, link
->flags
);
393 * ata_force_xfermask - force xfermask according to libata.force
394 * @dev: ATA device of interest
396 * Force xfer_mask according to libata.force and whine about it.
397 * For consistency with link selection, device number 15 selects
398 * the first device connected to the host link.
403 static void ata_force_xfermask(struct ata_device
*dev
)
405 int devno
= dev
->link
->pmp
+ dev
->devno
;
406 int alt_devno
= devno
;
409 /* allow n.15/16 for devices attached to host port */
410 if (ata_is_host_link(dev
->link
))
413 for (i
= ata_force_tbl_size
- 1; i
>= 0; i
--) {
414 const struct ata_force_ent
*fe
= &ata_force_tbl
[i
];
415 unsigned long pio_mask
, mwdma_mask
, udma_mask
;
417 if (fe
->port
!= -1 && fe
->port
!= dev
->link
->ap
->print_id
)
420 if (fe
->device
!= -1 && fe
->device
!= devno
&&
421 fe
->device
!= alt_devno
)
424 if (!fe
->param
.xfer_mask
)
427 ata_unpack_xfermask(fe
->param
.xfer_mask
,
428 &pio_mask
, &mwdma_mask
, &udma_mask
);
430 dev
->udma_mask
= udma_mask
;
431 else if (mwdma_mask
) {
433 dev
->mwdma_mask
= mwdma_mask
;
437 dev
->pio_mask
= pio_mask
;
440 ata_dev_notice(dev
, "FORCE: xfer_mask set to %s\n",
447 * ata_force_horkage - force horkage according to libata.force
448 * @dev: ATA device of interest
450 * Force horkage according to libata.force and whine about it.
451 * For consistency with link selection, device number 15 selects
452 * the first device connected to the host link.
457 static void ata_force_horkage(struct ata_device
*dev
)
459 int devno
= dev
->link
->pmp
+ dev
->devno
;
460 int alt_devno
= devno
;
463 /* allow n.15/16 for devices attached to host port */
464 if (ata_is_host_link(dev
->link
))
467 for (i
= 0; i
< ata_force_tbl_size
; i
++) {
468 const struct ata_force_ent
*fe
= &ata_force_tbl
[i
];
470 if (fe
->port
!= -1 && fe
->port
!= dev
->link
->ap
->print_id
)
473 if (fe
->device
!= -1 && fe
->device
!= devno
&&
474 fe
->device
!= alt_devno
)
477 if (!(~dev
->horkage
& fe
->param
.horkage_on
) &&
478 !(dev
->horkage
& fe
->param
.horkage_off
))
481 dev
->horkage
|= fe
->param
.horkage_on
;
482 dev
->horkage
&= ~fe
->param
.horkage_off
;
484 ata_dev_notice(dev
, "FORCE: horkage modified (%s)\n",
489 static inline void ata_force_link_limits(struct ata_link
*link
) { }
490 static inline void ata_force_xfermask(struct ata_device
*dev
) { }
491 static inline void ata_force_horkage(struct ata_device
*dev
) { }
495 * atapi_cmd_type - Determine ATAPI command type from SCSI opcode
496 * @opcode: SCSI opcode
498 * Determine ATAPI command type from @opcode.
504 * ATAPI_{READ|WRITE|READ_CD|PASS_THRU|MISC}
506 int atapi_cmd_type(u8 opcode
)
515 case GPCMD_WRITE_AND_VERIFY_10
:
519 case GPCMD_READ_CD_MSF
:
520 return ATAPI_READ_CD
;
524 if (atapi_passthru16
)
525 return ATAPI_PASS_THRU
;
531 EXPORT_SYMBOL_GPL(atapi_cmd_type
);
533 static const u8 ata_rw_cmds
[] = {
537 ATA_CMD_READ_MULTI_EXT
,
538 ATA_CMD_WRITE_MULTI_EXT
,
542 ATA_CMD_WRITE_MULTI_FUA_EXT
,
546 ATA_CMD_PIO_READ_EXT
,
547 ATA_CMD_PIO_WRITE_EXT
,
560 ATA_CMD_WRITE_FUA_EXT
564 * ata_rwcmd_protocol - set taskfile r/w commands and protocol
565 * @tf: command to examine and configure
566 * @dev: device tf belongs to
568 * Examine the device configuration and tf->flags to calculate
569 * the proper read/write commands and protocol to use.
574 static int ata_rwcmd_protocol(struct ata_taskfile
*tf
, struct ata_device
*dev
)
578 int index
, fua
, lba48
, write
;
580 fua
= (tf
->flags
& ATA_TFLAG_FUA
) ? 4 : 0;
581 lba48
= (tf
->flags
& ATA_TFLAG_LBA48
) ? 2 : 0;
582 write
= (tf
->flags
& ATA_TFLAG_WRITE
) ? 1 : 0;
584 if (dev
->flags
& ATA_DFLAG_PIO
) {
585 tf
->protocol
= ATA_PROT_PIO
;
586 index
= dev
->multi_count
? 0 : 8;
587 } else if (lba48
&& (dev
->link
->ap
->flags
& ATA_FLAG_PIO_LBA48
)) {
588 /* Unable to use DMA due to host limitation */
589 tf
->protocol
= ATA_PROT_PIO
;
590 index
= dev
->multi_count
? 0 : 8;
592 tf
->protocol
= ATA_PROT_DMA
;
596 cmd
= ata_rw_cmds
[index
+ fua
+ lba48
+ write
];
605 * ata_tf_read_block - Read block address from ATA taskfile
606 * @tf: ATA taskfile of interest
607 * @dev: ATA device @tf belongs to
612 * Read block address from @tf. This function can handle all
613 * three address formats - LBA, LBA48 and CHS. tf->protocol and
614 * flags select the address format to use.
617 * Block address read from @tf.
619 u64
ata_tf_read_block(const struct ata_taskfile
*tf
, struct ata_device
*dev
)
623 if (tf
->flags
& ATA_TFLAG_LBA
) {
624 if (tf
->flags
& ATA_TFLAG_LBA48
) {
625 block
|= (u64
)tf
->hob_lbah
<< 40;
626 block
|= (u64
)tf
->hob_lbam
<< 32;
627 block
|= (u64
)tf
->hob_lbal
<< 24;
629 block
|= (tf
->device
& 0xf) << 24;
631 block
|= tf
->lbah
<< 16;
632 block
|= tf
->lbam
<< 8;
637 cyl
= tf
->lbam
| (tf
->lbah
<< 8);
638 head
= tf
->device
& 0xf;
643 "device reported invalid CHS sector 0\n");
647 block
= (cyl
* dev
->heads
+ head
) * dev
->sectors
+ sect
- 1;
654 * ata_build_rw_tf - Build ATA taskfile for given read/write request
655 * @tf: Target ATA taskfile
656 * @dev: ATA device @tf belongs to
657 * @block: Block address
658 * @n_block: Number of blocks
659 * @tf_flags: RW/FUA etc...
661 * @class: IO priority class
666 * Build ATA taskfile @tf for read/write request described by
667 * @block, @n_block, @tf_flags and @tag on @dev.
671 * 0 on success, -ERANGE if the request is too large for @dev,
672 * -EINVAL if the request is invalid.
674 int ata_build_rw_tf(struct ata_taskfile
*tf
, struct ata_device
*dev
,
675 u64 block
, u32 n_block
, unsigned int tf_flags
,
676 unsigned int tag
, int class)
678 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
679 tf
->flags
|= tf_flags
;
681 if (ata_ncq_enabled(dev
) && !ata_tag_internal(tag
)) {
683 if (!lba_48_ok(block
, n_block
))
686 tf
->protocol
= ATA_PROT_NCQ
;
687 tf
->flags
|= ATA_TFLAG_LBA
| ATA_TFLAG_LBA48
;
689 if (tf
->flags
& ATA_TFLAG_WRITE
)
690 tf
->command
= ATA_CMD_FPDMA_WRITE
;
692 tf
->command
= ATA_CMD_FPDMA_READ
;
694 tf
->nsect
= tag
<< 3;
695 tf
->hob_feature
= (n_block
>> 8) & 0xff;
696 tf
->feature
= n_block
& 0xff;
698 tf
->hob_lbah
= (block
>> 40) & 0xff;
699 tf
->hob_lbam
= (block
>> 32) & 0xff;
700 tf
->hob_lbal
= (block
>> 24) & 0xff;
701 tf
->lbah
= (block
>> 16) & 0xff;
702 tf
->lbam
= (block
>> 8) & 0xff;
703 tf
->lbal
= block
& 0xff;
705 tf
->device
= ATA_LBA
;
706 if (tf
->flags
& ATA_TFLAG_FUA
)
707 tf
->device
|= 1 << 7;
709 if (dev
->flags
& ATA_DFLAG_NCQ_PRIO
) {
710 if (class == IOPRIO_CLASS_RT
)
711 tf
->hob_nsect
|= ATA_PRIO_HIGH
<<
714 } else if (dev
->flags
& ATA_DFLAG_LBA
) {
715 tf
->flags
|= ATA_TFLAG_LBA
;
717 if (lba_28_ok(block
, n_block
)) {
719 tf
->device
|= (block
>> 24) & 0xf;
720 } else if (lba_48_ok(block
, n_block
)) {
721 if (!(dev
->flags
& ATA_DFLAG_LBA48
))
725 tf
->flags
|= ATA_TFLAG_LBA48
;
727 tf
->hob_nsect
= (n_block
>> 8) & 0xff;
729 tf
->hob_lbah
= (block
>> 40) & 0xff;
730 tf
->hob_lbam
= (block
>> 32) & 0xff;
731 tf
->hob_lbal
= (block
>> 24) & 0xff;
733 /* request too large even for LBA48 */
736 if (unlikely(ata_rwcmd_protocol(tf
, dev
) < 0))
739 tf
->nsect
= n_block
& 0xff;
741 tf
->lbah
= (block
>> 16) & 0xff;
742 tf
->lbam
= (block
>> 8) & 0xff;
743 tf
->lbal
= block
& 0xff;
745 tf
->device
|= ATA_LBA
;
748 u32 sect
, head
, cyl
, track
;
750 /* The request -may- be too large for CHS addressing. */
751 if (!lba_28_ok(block
, n_block
))
754 if (unlikely(ata_rwcmd_protocol(tf
, dev
) < 0))
757 /* Convert LBA to CHS */
758 track
= (u32
)block
/ dev
->sectors
;
759 cyl
= track
/ dev
->heads
;
760 head
= track
% dev
->heads
;
761 sect
= (u32
)block
% dev
->sectors
+ 1;
763 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
764 (u32
)block
, track
, cyl
, head
, sect
);
766 /* Check whether the converted CHS can fit.
770 if ((cyl
>> 16) || (head
>> 4) || (sect
>> 8) || (!sect
))
773 tf
->nsect
= n_block
& 0xff; /* Sector count 0 means 256 sectors */
784 * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask
785 * @pio_mask: pio_mask
786 * @mwdma_mask: mwdma_mask
787 * @udma_mask: udma_mask
789 * Pack @pio_mask, @mwdma_mask and @udma_mask into a single
790 * unsigned int xfer_mask.
798 unsigned long ata_pack_xfermask(unsigned long pio_mask
,
799 unsigned long mwdma_mask
,
800 unsigned long udma_mask
)
802 return ((pio_mask
<< ATA_SHIFT_PIO
) & ATA_MASK_PIO
) |
803 ((mwdma_mask
<< ATA_SHIFT_MWDMA
) & ATA_MASK_MWDMA
) |
804 ((udma_mask
<< ATA_SHIFT_UDMA
) & ATA_MASK_UDMA
);
806 EXPORT_SYMBOL_GPL(ata_pack_xfermask
);
809 * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks
810 * @xfer_mask: xfer_mask to unpack
811 * @pio_mask: resulting pio_mask
812 * @mwdma_mask: resulting mwdma_mask
813 * @udma_mask: resulting udma_mask
815 * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask.
816 * Any NULL destination masks will be ignored.
818 void ata_unpack_xfermask(unsigned long xfer_mask
, unsigned long *pio_mask
,
819 unsigned long *mwdma_mask
, unsigned long *udma_mask
)
822 *pio_mask
= (xfer_mask
& ATA_MASK_PIO
) >> ATA_SHIFT_PIO
;
824 *mwdma_mask
= (xfer_mask
& ATA_MASK_MWDMA
) >> ATA_SHIFT_MWDMA
;
826 *udma_mask
= (xfer_mask
& ATA_MASK_UDMA
) >> ATA_SHIFT_UDMA
;
829 static const struct ata_xfer_ent
{
833 { ATA_SHIFT_PIO
, ATA_NR_PIO_MODES
, XFER_PIO_0
},
834 { ATA_SHIFT_MWDMA
, ATA_NR_MWDMA_MODES
, XFER_MW_DMA_0
},
835 { ATA_SHIFT_UDMA
, ATA_NR_UDMA_MODES
, XFER_UDMA_0
},
840 * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask
841 * @xfer_mask: xfer_mask of interest
843 * Return matching XFER_* value for @xfer_mask. Only the highest
844 * bit of @xfer_mask is considered.
850 * Matching XFER_* value, 0xff if no match found.
852 u8
ata_xfer_mask2mode(unsigned long xfer_mask
)
854 int highbit
= fls(xfer_mask
) - 1;
855 const struct ata_xfer_ent
*ent
;
857 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
858 if (highbit
>= ent
->shift
&& highbit
< ent
->shift
+ ent
->bits
)
859 return ent
->base
+ highbit
- ent
->shift
;
862 EXPORT_SYMBOL_GPL(ata_xfer_mask2mode
);
865 * ata_xfer_mode2mask - Find matching xfer_mask for XFER_*
866 * @xfer_mode: XFER_* of interest
868 * Return matching xfer_mask for @xfer_mode.
874 * Matching xfer_mask, 0 if no match found.
876 unsigned long ata_xfer_mode2mask(u8 xfer_mode
)
878 const struct ata_xfer_ent
*ent
;
880 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
881 if (xfer_mode
>= ent
->base
&& xfer_mode
< ent
->base
+ ent
->bits
)
882 return ((2 << (ent
->shift
+ xfer_mode
- ent
->base
)) - 1)
883 & ~((1 << ent
->shift
) - 1);
886 EXPORT_SYMBOL_GPL(ata_xfer_mode2mask
);
889 * ata_xfer_mode2shift - Find matching xfer_shift for XFER_*
890 * @xfer_mode: XFER_* of interest
892 * Return matching xfer_shift for @xfer_mode.
898 * Matching xfer_shift, -1 if no match found.
900 int ata_xfer_mode2shift(unsigned long xfer_mode
)
902 const struct ata_xfer_ent
*ent
;
904 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
905 if (xfer_mode
>= ent
->base
&& xfer_mode
< ent
->base
+ ent
->bits
)
909 EXPORT_SYMBOL_GPL(ata_xfer_mode2shift
);
912 * ata_mode_string - convert xfer_mask to string
913 * @xfer_mask: mask of bits supported; only highest bit counts.
915 * Determine string which represents the highest speed
916 * (highest bit in @modemask).
922 * Constant C string representing highest speed listed in
923 * @mode_mask, or the constant C string "<n/a>".
925 const char *ata_mode_string(unsigned long xfer_mask
)
927 static const char * const xfer_mode_str
[] = {
951 highbit
= fls(xfer_mask
) - 1;
952 if (highbit
>= 0 && highbit
< ARRAY_SIZE(xfer_mode_str
))
953 return xfer_mode_str
[highbit
];
956 EXPORT_SYMBOL_GPL(ata_mode_string
);
958 const char *sata_spd_string(unsigned int spd
)
960 static const char * const spd_str
[] = {
966 if (spd
== 0 || (spd
- 1) >= ARRAY_SIZE(spd_str
))
968 return spd_str
[spd
- 1];
972 * ata_dev_classify - determine device type based on ATA-spec signature
973 * @tf: ATA taskfile register set for device to be identified
975 * Determine from taskfile register contents whether a device is
976 * ATA or ATAPI, as per "Signature and persistence" section
977 * of ATA/PI spec (volume 1, sect 5.14).
983 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, %ATA_DEV_PMP,
984 * %ATA_DEV_ZAC, or %ATA_DEV_UNKNOWN the event of failure.
986 unsigned int ata_dev_classify(const struct ata_taskfile
*tf
)
988 /* Apple's open source Darwin code hints that some devices only
989 * put a proper signature into the LBA mid/high registers,
990 * So, we only check those. It's sufficient for uniqueness.
992 * ATA/ATAPI-7 (d1532v1r1: Feb. 19, 2003) specified separate
993 * signatures for ATA and ATAPI devices attached on SerialATA,
994 * 0x3c/0xc3 and 0x69/0x96 respectively. However, SerialATA
995 * spec has never mentioned about using different signatures
996 * for ATA/ATAPI devices. Then, Serial ATA II: Port
997 * Multiplier specification began to use 0x69/0x96 to identify
998 * port multpliers and 0x3c/0xc3 to identify SEMB device.
999 * ATA/ATAPI-7 dropped descriptions about 0x3c/0xc3 and
1000 * 0x69/0x96 shortly and described them as reserved for
1003 * We follow the current spec and consider that 0x69/0x96
1004 * identifies a port multiplier and 0x3c/0xc3 a SEMB device.
1005 * Unfortunately, WDC WD1600JS-62MHB5 (a hard drive) reports
1006 * SEMB signature. This is worked around in
1007 * ata_dev_read_id().
1009 if ((tf
->lbam
== 0) && (tf
->lbah
== 0)) {
1010 DPRINTK("found ATA device by sig\n");
1014 if ((tf
->lbam
== 0x14) && (tf
->lbah
== 0xeb)) {
1015 DPRINTK("found ATAPI device by sig\n");
1016 return ATA_DEV_ATAPI
;
1019 if ((tf
->lbam
== 0x69) && (tf
->lbah
== 0x96)) {
1020 DPRINTK("found PMP device by sig\n");
1024 if ((tf
->lbam
== 0x3c) && (tf
->lbah
== 0xc3)) {
1025 DPRINTK("found SEMB device by sig (could be ATA device)\n");
1026 return ATA_DEV_SEMB
;
1029 if ((tf
->lbam
== 0xcd) && (tf
->lbah
== 0xab)) {
1030 DPRINTK("found ZAC device by sig\n");
1034 DPRINTK("unknown device\n");
1035 return ATA_DEV_UNKNOWN
;
1037 EXPORT_SYMBOL_GPL(ata_dev_classify
);
1040 * ata_id_string - Convert IDENTIFY DEVICE page into string
1041 * @id: IDENTIFY DEVICE results we will examine
1042 * @s: string into which data is output
1043 * @ofs: offset into identify device page
1044 * @len: length of string to return. must be an even number.
1046 * The strings in the IDENTIFY DEVICE page are broken up into
1047 * 16-bit chunks. Run through the string, and output each
1048 * 8-bit chunk linearly, regardless of platform.
1054 void ata_id_string(const u16
*id
, unsigned char *s
,
1055 unsigned int ofs
, unsigned int len
)
1074 EXPORT_SYMBOL_GPL(ata_id_string
);
1077 * ata_id_c_string - Convert IDENTIFY DEVICE page into C string
1078 * @id: IDENTIFY DEVICE results we will examine
1079 * @s: string into which data is output
1080 * @ofs: offset into identify device page
1081 * @len: length of string to return. must be an odd number.
1083 * This function is identical to ata_id_string except that it
1084 * trims trailing spaces and terminates the resulting string with
1085 * null. @len must be actual maximum length (even number) + 1.
1090 void ata_id_c_string(const u16
*id
, unsigned char *s
,
1091 unsigned int ofs
, unsigned int len
)
1095 ata_id_string(id
, s
, ofs
, len
- 1);
1097 p
= s
+ strnlen(s
, len
- 1);
1098 while (p
> s
&& p
[-1] == ' ')
1102 EXPORT_SYMBOL_GPL(ata_id_c_string
);
1104 static u64
ata_id_n_sectors(const u16
*id
)
1106 if (ata_id_has_lba(id
)) {
1107 if (ata_id_has_lba48(id
))
1108 return ata_id_u64(id
, ATA_ID_LBA_CAPACITY_2
);
1110 return ata_id_u32(id
, ATA_ID_LBA_CAPACITY
);
1112 if (ata_id_current_chs_valid(id
))
1113 return id
[ATA_ID_CUR_CYLS
] * id
[ATA_ID_CUR_HEADS
] *
1114 id
[ATA_ID_CUR_SECTORS
];
1116 return id
[ATA_ID_CYLS
] * id
[ATA_ID_HEADS
] *
1121 u64
ata_tf_to_lba48(const struct ata_taskfile
*tf
)
1125 sectors
|= ((u64
)(tf
->hob_lbah
& 0xff)) << 40;
1126 sectors
|= ((u64
)(tf
->hob_lbam
& 0xff)) << 32;
1127 sectors
|= ((u64
)(tf
->hob_lbal
& 0xff)) << 24;
1128 sectors
|= (tf
->lbah
& 0xff) << 16;
1129 sectors
|= (tf
->lbam
& 0xff) << 8;
1130 sectors
|= (tf
->lbal
& 0xff);
1135 u64
ata_tf_to_lba(const struct ata_taskfile
*tf
)
1139 sectors
|= (tf
->device
& 0x0f) << 24;
1140 sectors
|= (tf
->lbah
& 0xff) << 16;
1141 sectors
|= (tf
->lbam
& 0xff) << 8;
1142 sectors
|= (tf
->lbal
& 0xff);
1148 * ata_read_native_max_address - Read native max address
1149 * @dev: target device
1150 * @max_sectors: out parameter for the result native max address
1152 * Perform an LBA48 or LBA28 native size query upon the device in
1156 * 0 on success, -EACCES if command is aborted by the drive.
1157 * -EIO on other errors.
1159 static int ata_read_native_max_address(struct ata_device
*dev
, u64
*max_sectors
)
1161 unsigned int err_mask
;
1162 struct ata_taskfile tf
;
1163 int lba48
= ata_id_has_lba48(dev
->id
);
1165 ata_tf_init(dev
, &tf
);
1167 /* always clear all address registers */
1168 tf
.flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
1171 tf
.command
= ATA_CMD_READ_NATIVE_MAX_EXT
;
1172 tf
.flags
|= ATA_TFLAG_LBA48
;
1174 tf
.command
= ATA_CMD_READ_NATIVE_MAX
;
1176 tf
.protocol
= ATA_PROT_NODATA
;
1177 tf
.device
|= ATA_LBA
;
1179 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
1182 "failed to read native max address (err_mask=0x%x)\n",
1184 if (err_mask
== AC_ERR_DEV
&& (tf
.feature
& ATA_ABORTED
))
1190 *max_sectors
= ata_tf_to_lba48(&tf
) + 1;
1192 *max_sectors
= ata_tf_to_lba(&tf
) + 1;
1193 if (dev
->horkage
& ATA_HORKAGE_HPA_SIZE
)
1199 * ata_set_max_sectors - Set max sectors
1200 * @dev: target device
1201 * @new_sectors: new max sectors value to set for the device
1203 * Set max sectors of @dev to @new_sectors.
1206 * 0 on success, -EACCES if command is aborted or denied (due to
1207 * previous non-volatile SET_MAX) by the drive. -EIO on other
1210 static int ata_set_max_sectors(struct ata_device
*dev
, u64 new_sectors
)
1212 unsigned int err_mask
;
1213 struct ata_taskfile tf
;
1214 int lba48
= ata_id_has_lba48(dev
->id
);
1218 ata_tf_init(dev
, &tf
);
1220 tf
.flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
1223 tf
.command
= ATA_CMD_SET_MAX_EXT
;
1224 tf
.flags
|= ATA_TFLAG_LBA48
;
1226 tf
.hob_lbal
= (new_sectors
>> 24) & 0xff;
1227 tf
.hob_lbam
= (new_sectors
>> 32) & 0xff;
1228 tf
.hob_lbah
= (new_sectors
>> 40) & 0xff;
1230 tf
.command
= ATA_CMD_SET_MAX
;
1232 tf
.device
|= (new_sectors
>> 24) & 0xf;
1235 tf
.protocol
= ATA_PROT_NODATA
;
1236 tf
.device
|= ATA_LBA
;
1238 tf
.lbal
= (new_sectors
>> 0) & 0xff;
1239 tf
.lbam
= (new_sectors
>> 8) & 0xff;
1240 tf
.lbah
= (new_sectors
>> 16) & 0xff;
1242 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
1245 "failed to set max address (err_mask=0x%x)\n",
1247 if (err_mask
== AC_ERR_DEV
&&
1248 (tf
.feature
& (ATA_ABORTED
| ATA_IDNF
)))
1257 * ata_hpa_resize - Resize a device with an HPA set
1258 * @dev: Device to resize
1260 * Read the size of an LBA28 or LBA48 disk with HPA features and resize
1261 * it if required to the full size of the media. The caller must check
1262 * the drive has the HPA feature set enabled.
1265 * 0 on success, -errno on failure.
1267 static int ata_hpa_resize(struct ata_device
*dev
)
1269 struct ata_eh_context
*ehc
= &dev
->link
->eh_context
;
1270 int print_info
= ehc
->i
.flags
& ATA_EHI_PRINTINFO
;
1271 bool unlock_hpa
= ata_ignore_hpa
|| dev
->flags
& ATA_DFLAG_UNLOCK_HPA
;
1272 u64 sectors
= ata_id_n_sectors(dev
->id
);
1276 /* do we need to do it? */
1277 if ((dev
->class != ATA_DEV_ATA
&& dev
->class != ATA_DEV_ZAC
) ||
1278 !ata_id_has_lba(dev
->id
) || !ata_id_hpa_enabled(dev
->id
) ||
1279 (dev
->horkage
& ATA_HORKAGE_BROKEN_HPA
))
1282 /* read native max address */
1283 rc
= ata_read_native_max_address(dev
, &native_sectors
);
1285 /* If device aborted the command or HPA isn't going to
1286 * be unlocked, skip HPA resizing.
1288 if (rc
== -EACCES
|| !unlock_hpa
) {
1290 "HPA support seems broken, skipping HPA handling\n");
1291 dev
->horkage
|= ATA_HORKAGE_BROKEN_HPA
;
1293 /* we can continue if device aborted the command */
1300 dev
->n_native_sectors
= native_sectors
;
1302 /* nothing to do? */
1303 if (native_sectors
<= sectors
|| !unlock_hpa
) {
1304 if (!print_info
|| native_sectors
== sectors
)
1307 if (native_sectors
> sectors
)
1309 "HPA detected: current %llu, native %llu\n",
1310 (unsigned long long)sectors
,
1311 (unsigned long long)native_sectors
);
1312 else if (native_sectors
< sectors
)
1314 "native sectors (%llu) is smaller than sectors (%llu)\n",
1315 (unsigned long long)native_sectors
,
1316 (unsigned long long)sectors
);
1320 /* let's unlock HPA */
1321 rc
= ata_set_max_sectors(dev
, native_sectors
);
1322 if (rc
== -EACCES
) {
1323 /* if device aborted the command, skip HPA resizing */
1325 "device aborted resize (%llu -> %llu), skipping HPA handling\n",
1326 (unsigned long long)sectors
,
1327 (unsigned long long)native_sectors
);
1328 dev
->horkage
|= ATA_HORKAGE_BROKEN_HPA
;
1333 /* re-read IDENTIFY data */
1334 rc
= ata_dev_reread_id(dev
, 0);
1337 "failed to re-read IDENTIFY data after HPA resizing\n");
1342 u64 new_sectors
= ata_id_n_sectors(dev
->id
);
1344 "HPA unlocked: %llu -> %llu, native %llu\n",
1345 (unsigned long long)sectors
,
1346 (unsigned long long)new_sectors
,
1347 (unsigned long long)native_sectors
);
1354 * ata_dump_id - IDENTIFY DEVICE info debugging output
1355 * @id: IDENTIFY DEVICE page to dump
1357 * Dump selected 16-bit words from the given IDENTIFY DEVICE
1364 static inline void ata_dump_id(const u16
*id
)
1366 DPRINTK("49==0x%04x "
1376 DPRINTK("80==0x%04x "
1386 DPRINTK("88==0x%04x "
1393 * ata_id_xfermask - Compute xfermask from the given IDENTIFY data
1394 * @id: IDENTIFY data to compute xfer mask from
1396 * Compute the xfermask for this device. This is not as trivial
1397 * as it seems if we must consider early devices correctly.
1399 * FIXME: pre IDE drive timing (do we care ?).
1407 unsigned long ata_id_xfermask(const u16
*id
)
1409 unsigned long pio_mask
, mwdma_mask
, udma_mask
;
1411 /* Usual case. Word 53 indicates word 64 is valid */
1412 if (id
[ATA_ID_FIELD_VALID
] & (1 << 1)) {
1413 pio_mask
= id
[ATA_ID_PIO_MODES
] & 0x03;
1417 /* If word 64 isn't valid then Word 51 high byte holds
1418 * the PIO timing number for the maximum. Turn it into
1421 u8 mode
= (id
[ATA_ID_OLD_PIO_MODES
] >> 8) & 0xFF;
1422 if (mode
< 5) /* Valid PIO range */
1423 pio_mask
= (2 << mode
) - 1;
1427 /* But wait.. there's more. Design your standards by
1428 * committee and you too can get a free iordy field to
1429 * process. However its the speeds not the modes that
1430 * are supported... Note drivers using the timing API
1431 * will get this right anyway
1435 mwdma_mask
= id
[ATA_ID_MWDMA_MODES
] & 0x07;
1437 if (ata_id_is_cfa(id
)) {
1439 * Process compact flash extended modes
1441 int pio
= (id
[ATA_ID_CFA_MODES
] >> 0) & 0x7;
1442 int dma
= (id
[ATA_ID_CFA_MODES
] >> 3) & 0x7;
1445 pio_mask
|= (1 << 5);
1447 pio_mask
|= (1 << 6);
1449 mwdma_mask
|= (1 << 3);
1451 mwdma_mask
|= (1 << 4);
1455 if (id
[ATA_ID_FIELD_VALID
] & (1 << 2))
1456 udma_mask
= id
[ATA_ID_UDMA_MODES
] & 0xff;
1458 return ata_pack_xfermask(pio_mask
, mwdma_mask
, udma_mask
);
1460 EXPORT_SYMBOL_GPL(ata_id_xfermask
);
1462 static void ata_qc_complete_internal(struct ata_queued_cmd
*qc
)
1464 struct completion
*waiting
= qc
->private_data
;
1470 * ata_exec_internal_sg - execute libata internal command
1471 * @dev: Device to which the command is sent
1472 * @tf: Taskfile registers for the command and the result
1473 * @cdb: CDB for packet command
1474 * @dma_dir: Data transfer direction of the command
1475 * @sgl: sg list for the data buffer of the command
1476 * @n_elem: Number of sg entries
1477 * @timeout: Timeout in msecs (0 for default)
1479 * Executes libata internal command with timeout. @tf contains
1480 * command on entry and result on return. Timeout and error
1481 * conditions are reported via return value. No recovery action
1482 * is taken after a command times out. It's caller's duty to
1483 * clean up after timeout.
1486 * None. Should be called with kernel context, might sleep.
1489 * Zero on success, AC_ERR_* mask on failure
1491 unsigned ata_exec_internal_sg(struct ata_device
*dev
,
1492 struct ata_taskfile
*tf
, const u8
*cdb
,
1493 int dma_dir
, struct scatterlist
*sgl
,
1494 unsigned int n_elem
, unsigned long timeout
)
1496 struct ata_link
*link
= dev
->link
;
1497 struct ata_port
*ap
= link
->ap
;
1498 u8 command
= tf
->command
;
1499 int auto_timeout
= 0;
1500 struct ata_queued_cmd
*qc
;
1501 unsigned int preempted_tag
;
1502 u32 preempted_sactive
;
1503 u64 preempted_qc_active
;
1504 int preempted_nr_active_links
;
1505 DECLARE_COMPLETION_ONSTACK(wait
);
1506 unsigned long flags
;
1507 unsigned int err_mask
;
1510 spin_lock_irqsave(ap
->lock
, flags
);
1512 /* no internal command while frozen */
1513 if (ap
->pflags
& ATA_PFLAG_FROZEN
) {
1514 spin_unlock_irqrestore(ap
->lock
, flags
);
1515 return AC_ERR_SYSTEM
;
1518 /* initialize internal qc */
1519 qc
= __ata_qc_from_tag(ap
, ATA_TAG_INTERNAL
);
1521 qc
->tag
= ATA_TAG_INTERNAL
;
1528 preempted_tag
= link
->active_tag
;
1529 preempted_sactive
= link
->sactive
;
1530 preempted_qc_active
= ap
->qc_active
;
1531 preempted_nr_active_links
= ap
->nr_active_links
;
1532 link
->active_tag
= ATA_TAG_POISON
;
1535 ap
->nr_active_links
= 0;
1537 /* prepare & issue qc */
1540 memcpy(qc
->cdb
, cdb
, ATAPI_CDB_LEN
);
1542 /* some SATA bridges need us to indicate data xfer direction */
1543 if (tf
->protocol
== ATAPI_PROT_DMA
&& (dev
->flags
& ATA_DFLAG_DMADIR
) &&
1544 dma_dir
== DMA_FROM_DEVICE
)
1545 qc
->tf
.feature
|= ATAPI_DMADIR
;
1547 qc
->flags
|= ATA_QCFLAG_RESULT_TF
;
1548 qc
->dma_dir
= dma_dir
;
1549 if (dma_dir
!= DMA_NONE
) {
1550 unsigned int i
, buflen
= 0;
1551 struct scatterlist
*sg
;
1553 for_each_sg(sgl
, sg
, n_elem
, i
)
1554 buflen
+= sg
->length
;
1556 ata_sg_init(qc
, sgl
, n_elem
);
1557 qc
->nbytes
= buflen
;
1560 qc
->private_data
= &wait
;
1561 qc
->complete_fn
= ata_qc_complete_internal
;
1565 spin_unlock_irqrestore(ap
->lock
, flags
);
1568 if (ata_probe_timeout
)
1569 timeout
= ata_probe_timeout
* 1000;
1571 timeout
= ata_internal_cmd_timeout(dev
, command
);
1576 if (ap
->ops
->error_handler
)
1579 rc
= wait_for_completion_timeout(&wait
, msecs_to_jiffies(timeout
));
1581 if (ap
->ops
->error_handler
)
1584 ata_sff_flush_pio_task(ap
);
1587 spin_lock_irqsave(ap
->lock
, flags
);
1589 /* We're racing with irq here. If we lose, the
1590 * following test prevents us from completing the qc
1591 * twice. If we win, the port is frozen and will be
1592 * cleaned up by ->post_internal_cmd().
1594 if (qc
->flags
& ATA_QCFLAG_ACTIVE
) {
1595 qc
->err_mask
|= AC_ERR_TIMEOUT
;
1597 if (ap
->ops
->error_handler
)
1598 ata_port_freeze(ap
);
1600 ata_qc_complete(qc
);
1602 if (ata_msg_warn(ap
))
1603 ata_dev_warn(dev
, "qc timeout (cmd 0x%x)\n",
1607 spin_unlock_irqrestore(ap
->lock
, flags
);
1610 /* do post_internal_cmd */
1611 if (ap
->ops
->post_internal_cmd
)
1612 ap
->ops
->post_internal_cmd(qc
);
1614 /* perform minimal error analysis */
1615 if (qc
->flags
& ATA_QCFLAG_FAILED
) {
1616 if (qc
->result_tf
.command
& (ATA_ERR
| ATA_DF
))
1617 qc
->err_mask
|= AC_ERR_DEV
;
1620 qc
->err_mask
|= AC_ERR_OTHER
;
1622 if (qc
->err_mask
& ~AC_ERR_OTHER
)
1623 qc
->err_mask
&= ~AC_ERR_OTHER
;
1624 } else if (qc
->tf
.command
== ATA_CMD_REQ_SENSE_DATA
) {
1625 qc
->result_tf
.command
|= ATA_SENSE
;
1629 spin_lock_irqsave(ap
->lock
, flags
);
1631 *tf
= qc
->result_tf
;
1632 err_mask
= qc
->err_mask
;
1635 link
->active_tag
= preempted_tag
;
1636 link
->sactive
= preempted_sactive
;
1637 ap
->qc_active
= preempted_qc_active
;
1638 ap
->nr_active_links
= preempted_nr_active_links
;
1640 spin_unlock_irqrestore(ap
->lock
, flags
);
1642 if ((err_mask
& AC_ERR_TIMEOUT
) && auto_timeout
)
1643 ata_internal_cmd_timed_out(dev
, command
);
1649 * ata_exec_internal - execute libata internal command
1650 * @dev: Device to which the command is sent
1651 * @tf: Taskfile registers for the command and the result
1652 * @cdb: CDB for packet command
1653 * @dma_dir: Data transfer direction of the command
1654 * @buf: Data buffer of the command
1655 * @buflen: Length of data buffer
1656 * @timeout: Timeout in msecs (0 for default)
1658 * Wrapper around ata_exec_internal_sg() which takes simple
1659 * buffer instead of sg list.
1662 * None. Should be called with kernel context, might sleep.
1665 * Zero on success, AC_ERR_* mask on failure
1667 unsigned ata_exec_internal(struct ata_device
*dev
,
1668 struct ata_taskfile
*tf
, const u8
*cdb
,
1669 int dma_dir
, void *buf
, unsigned int buflen
,
1670 unsigned long timeout
)
1672 struct scatterlist
*psg
= NULL
, sg
;
1673 unsigned int n_elem
= 0;
1675 if (dma_dir
!= DMA_NONE
) {
1677 sg_init_one(&sg
, buf
, buflen
);
1682 return ata_exec_internal_sg(dev
, tf
, cdb
, dma_dir
, psg
, n_elem
,
1687 * ata_pio_need_iordy - check if iordy needed
1690 * Check if the current speed of the device requires IORDY. Used
1691 * by various controllers for chip configuration.
1693 unsigned int ata_pio_need_iordy(const struct ata_device
*adev
)
1695 /* Don't set IORDY if we're preparing for reset. IORDY may
1696 * lead to controller lock up on certain controllers if the
1697 * port is not occupied. See bko#11703 for details.
1699 if (adev
->link
->ap
->pflags
& ATA_PFLAG_RESETTING
)
1701 /* Controller doesn't support IORDY. Probably a pointless
1702 * check as the caller should know this.
1704 if (adev
->link
->ap
->flags
& ATA_FLAG_NO_IORDY
)
1706 /* CF spec. r4.1 Table 22 says no iordy on PIO5 and PIO6. */
1707 if (ata_id_is_cfa(adev
->id
)
1708 && (adev
->pio_mode
== XFER_PIO_5
|| adev
->pio_mode
== XFER_PIO_6
))
1710 /* PIO3 and higher it is mandatory */
1711 if (adev
->pio_mode
> XFER_PIO_2
)
1713 /* We turn it on when possible */
1714 if (ata_id_has_iordy(adev
->id
))
1718 EXPORT_SYMBOL_GPL(ata_pio_need_iordy
);
1721 * ata_pio_mask_no_iordy - Return the non IORDY mask
1724 * Compute the highest mode possible if we are not using iordy. Return
1725 * -1 if no iordy mode is available.
1727 static u32
ata_pio_mask_no_iordy(const struct ata_device
*adev
)
1729 /* If we have no drive specific rule, then PIO 2 is non IORDY */
1730 if (adev
->id
[ATA_ID_FIELD_VALID
] & 2) { /* EIDE */
1731 u16 pio
= adev
->id
[ATA_ID_EIDE_PIO
];
1732 /* Is the speed faster than the drive allows non IORDY ? */
1734 /* This is cycle times not frequency - watch the logic! */
1735 if (pio
> 240) /* PIO2 is 240nS per cycle */
1736 return 3 << ATA_SHIFT_PIO
;
1737 return 7 << ATA_SHIFT_PIO
;
1740 return 3 << ATA_SHIFT_PIO
;
1744 * ata_do_dev_read_id - default ID read method
1746 * @tf: proposed taskfile
1749 * Issue the identify taskfile and hand back the buffer containing
1750 * identify data. For some RAID controllers and for pre ATA devices
1751 * this function is wrapped or replaced by the driver
1753 unsigned int ata_do_dev_read_id(struct ata_device
*dev
,
1754 struct ata_taskfile
*tf
, u16
*id
)
1756 return ata_exec_internal(dev
, tf
, NULL
, DMA_FROM_DEVICE
,
1757 id
, sizeof(id
[0]) * ATA_ID_WORDS
, 0);
1759 EXPORT_SYMBOL_GPL(ata_do_dev_read_id
);
1762 * ata_dev_read_id - Read ID data from the specified device
1763 * @dev: target device
1764 * @p_class: pointer to class of the target device (may be changed)
1765 * @flags: ATA_READID_* flags
1766 * @id: buffer to read IDENTIFY data into
1768 * Read ID data from the specified device. ATA_CMD_ID_ATA is
1769 * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
1770 * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS
1771 * for pre-ATA4 drives.
1773 * FIXME: ATA_CMD_ID_ATA is optional for early drives and right
1774 * now we abort if we hit that case.
1777 * Kernel thread context (may sleep)
1780 * 0 on success, -errno otherwise.
1782 int ata_dev_read_id(struct ata_device
*dev
, unsigned int *p_class
,
1783 unsigned int flags
, u16
*id
)
1785 struct ata_port
*ap
= dev
->link
->ap
;
1786 unsigned int class = *p_class
;
1787 struct ata_taskfile tf
;
1788 unsigned int err_mask
= 0;
1790 bool is_semb
= class == ATA_DEV_SEMB
;
1791 int may_fallback
= 1, tried_spinup
= 0;
1794 if (ata_msg_ctl(ap
))
1795 ata_dev_dbg(dev
, "%s: ENTER\n", __func__
);
1798 ata_tf_init(dev
, &tf
);
1802 class = ATA_DEV_ATA
; /* some hard drives report SEMB sig */
1806 tf
.command
= ATA_CMD_ID_ATA
;
1809 tf
.command
= ATA_CMD_ID_ATAPI
;
1813 reason
= "unsupported class";
1817 tf
.protocol
= ATA_PROT_PIO
;
1819 /* Some devices choke if TF registers contain garbage. Make
1820 * sure those are properly initialized.
1822 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
1824 /* Device presence detection is unreliable on some
1825 * controllers. Always poll IDENTIFY if available.
1827 tf
.flags
|= ATA_TFLAG_POLLING
;
1829 if (ap
->ops
->read_id
)
1830 err_mask
= ap
->ops
->read_id(dev
, &tf
, id
);
1832 err_mask
= ata_do_dev_read_id(dev
, &tf
, id
);
1835 if (err_mask
& AC_ERR_NODEV_HINT
) {
1836 ata_dev_dbg(dev
, "NODEV after polling detection\n");
1842 "IDENTIFY failed on device w/ SEMB sig, disabled\n");
1843 /* SEMB is not supported yet */
1844 *p_class
= ATA_DEV_SEMB_UNSUP
;
1848 if ((err_mask
== AC_ERR_DEV
) && (tf
.feature
& ATA_ABORTED
)) {
1849 /* Device or controller might have reported
1850 * the wrong device class. Give a shot at the
1851 * other IDENTIFY if the current one is
1852 * aborted by the device.
1857 if (class == ATA_DEV_ATA
)
1858 class = ATA_DEV_ATAPI
;
1860 class = ATA_DEV_ATA
;
1864 /* Control reaches here iff the device aborted
1865 * both flavors of IDENTIFYs which happens
1866 * sometimes with phantom devices.
1869 "both IDENTIFYs aborted, assuming NODEV\n");
1874 reason
= "I/O error";
1878 if (dev
->horkage
& ATA_HORKAGE_DUMP_ID
) {
1879 ata_dev_dbg(dev
, "dumping IDENTIFY data, "
1880 "class=%d may_fallback=%d tried_spinup=%d\n",
1881 class, may_fallback
, tried_spinup
);
1882 print_hex_dump(KERN_DEBUG
, "", DUMP_PREFIX_OFFSET
,
1883 16, 2, id
, ATA_ID_WORDS
* sizeof(*id
), true);
1886 /* Falling back doesn't make sense if ID data was read
1887 * successfully at least once.
1891 swap_buf_le16(id
, ATA_ID_WORDS
);
1895 reason
= "device reports invalid type";
1897 if (class == ATA_DEV_ATA
|| class == ATA_DEV_ZAC
) {
1898 if (!ata_id_is_ata(id
) && !ata_id_is_cfa(id
))
1900 if (ap
->host
->flags
& ATA_HOST_IGNORE_ATA
&&
1901 ata_id_is_ata(id
)) {
1903 "host indicates ignore ATA devices, ignored\n");
1907 if (ata_id_is_ata(id
))
1911 if (!tried_spinup
&& (id
[2] == 0x37c8 || id
[2] == 0x738c)) {
1914 * Drive powered-up in standby mode, and requires a specific
1915 * SET_FEATURES spin-up subcommand before it will accept
1916 * anything other than the original IDENTIFY command.
1918 err_mask
= ata_dev_set_feature(dev
, SETFEATURES_SPINUP
, 0);
1919 if (err_mask
&& id
[2] != 0x738c) {
1921 reason
= "SPINUP failed";
1925 * If the drive initially returned incomplete IDENTIFY info,
1926 * we now must reissue the IDENTIFY command.
1928 if (id
[2] == 0x37c8)
1932 if ((flags
& ATA_READID_POSTRESET
) &&
1933 (class == ATA_DEV_ATA
|| class == ATA_DEV_ZAC
)) {
1935 * The exact sequence expected by certain pre-ATA4 drives is:
1937 * IDENTIFY (optional in early ATA)
1938 * INITIALIZE DEVICE PARAMETERS (later IDE and ATA)
1940 * Some drives were very specific about that exact sequence.
1942 * Note that ATA4 says lba is mandatory so the second check
1943 * should never trigger.
1945 if (ata_id_major_version(id
) < 4 || !ata_id_has_lba(id
)) {
1946 err_mask
= ata_dev_init_params(dev
, id
[3], id
[6]);
1949 reason
= "INIT_DEV_PARAMS failed";
1953 /* current CHS translation info (id[53-58]) might be
1954 * changed. reread the identify device info.
1956 flags
&= ~ATA_READID_POSTRESET
;
1966 if (ata_msg_warn(ap
))
1967 ata_dev_warn(dev
, "failed to IDENTIFY (%s, err_mask=0x%x)\n",
1973 * ata_read_log_page - read a specific log page
1974 * @dev: target device
1976 * @page: page to read
1977 * @buf: buffer to store read page
1978 * @sectors: number of sectors to read
1980 * Read log page using READ_LOG_EXT command.
1983 * Kernel thread context (may sleep).
1986 * 0 on success, AC_ERR_* mask otherwise.
1988 unsigned int ata_read_log_page(struct ata_device
*dev
, u8 log
,
1989 u8 page
, void *buf
, unsigned int sectors
)
1991 unsigned long ap_flags
= dev
->link
->ap
->flags
;
1992 struct ata_taskfile tf
;
1993 unsigned int err_mask
;
1996 DPRINTK("read log page - log 0x%x, page 0x%x\n", log
, page
);
1999 * Return error without actually issuing the command on controllers
2000 * which e.g. lockup on a read log page.
2002 if (ap_flags
& ATA_FLAG_NO_LOG_PAGE
)
2006 ata_tf_init(dev
, &tf
);
2007 if (dev
->dma_mode
&& ata_id_has_read_log_dma_ext(dev
->id
) &&
2008 !(dev
->horkage
& ATA_HORKAGE_NO_DMA_LOG
)) {
2009 tf
.command
= ATA_CMD_READ_LOG_DMA_EXT
;
2010 tf
.protocol
= ATA_PROT_DMA
;
2013 tf
.command
= ATA_CMD_READ_LOG_EXT
;
2014 tf
.protocol
= ATA_PROT_PIO
;
2020 tf
.hob_nsect
= sectors
>> 8;
2021 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_LBA48
| ATA_TFLAG_DEVICE
;
2023 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_FROM_DEVICE
,
2024 buf
, sectors
* ATA_SECT_SIZE
, 0);
2026 if (err_mask
&& dma
) {
2027 dev
->horkage
|= ATA_HORKAGE_NO_DMA_LOG
;
2028 ata_dev_warn(dev
, "READ LOG DMA EXT failed, trying PIO\n");
2032 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
2036 static bool ata_log_supported(struct ata_device
*dev
, u8 log
)
2038 struct ata_port
*ap
= dev
->link
->ap
;
2040 if (ata_read_log_page(dev
, ATA_LOG_DIRECTORY
, 0, ap
->sector_buf
, 1))
2042 return get_unaligned_le16(&ap
->sector_buf
[log
* 2]) ? true : false;
2045 static bool ata_identify_page_supported(struct ata_device
*dev
, u8 page
)
2047 struct ata_port
*ap
= dev
->link
->ap
;
2048 unsigned int err
, i
;
2050 if (!ata_log_supported(dev
, ATA_LOG_IDENTIFY_DEVICE
)) {
2051 ata_dev_warn(dev
, "ATA Identify Device Log not supported\n");
2056 * Read IDENTIFY DEVICE data log, page 0, to figure out if the page is
2059 err
= ata_read_log_page(dev
, ATA_LOG_IDENTIFY_DEVICE
, 0, ap
->sector_buf
,
2063 "failed to get Device Identify Log Emask 0x%x\n",
2068 for (i
= 0; i
< ap
->sector_buf
[8]; i
++) {
2069 if (ap
->sector_buf
[9 + i
] == page
)
2076 static int ata_do_link_spd_horkage(struct ata_device
*dev
)
2078 struct ata_link
*plink
= ata_dev_phys_link(dev
);
2079 u32 target
, target_limit
;
2081 if (!sata_scr_valid(plink
))
2084 if (dev
->horkage
& ATA_HORKAGE_1_5_GBPS
)
2089 target_limit
= (1 << target
) - 1;
2091 /* if already on stricter limit, no need to push further */
2092 if (plink
->sata_spd_limit
<= target_limit
)
2095 plink
->sata_spd_limit
= target_limit
;
2097 /* Request another EH round by returning -EAGAIN if link is
2098 * going faster than the target speed. Forward progress is
2099 * guaranteed by setting sata_spd_limit to target_limit above.
2101 if (plink
->sata_spd
> target
) {
2102 ata_dev_info(dev
, "applying link speed limit horkage to %s\n",
2103 sata_spd_string(target
));
2109 static inline u8
ata_dev_knobble(struct ata_device
*dev
)
2111 struct ata_port
*ap
= dev
->link
->ap
;
2113 if (ata_dev_blacklisted(dev
) & ATA_HORKAGE_BRIDGE_OK
)
2116 return ((ap
->cbl
== ATA_CBL_SATA
) && (!ata_id_is_sata(dev
->id
)));
2119 static void ata_dev_config_ncq_send_recv(struct ata_device
*dev
)
2121 struct ata_port
*ap
= dev
->link
->ap
;
2122 unsigned int err_mask
;
2124 if (!ata_log_supported(dev
, ATA_LOG_NCQ_SEND_RECV
)) {
2125 ata_dev_warn(dev
, "NCQ Send/Recv Log not supported\n");
2128 err_mask
= ata_read_log_page(dev
, ATA_LOG_NCQ_SEND_RECV
,
2129 0, ap
->sector_buf
, 1);
2132 "failed to get NCQ Send/Recv Log Emask 0x%x\n",
2135 u8
*cmds
= dev
->ncq_send_recv_cmds
;
2137 dev
->flags
|= ATA_DFLAG_NCQ_SEND_RECV
;
2138 memcpy(cmds
, ap
->sector_buf
, ATA_LOG_NCQ_SEND_RECV_SIZE
);
2140 if (dev
->horkage
& ATA_HORKAGE_NO_NCQ_TRIM
) {
2141 ata_dev_dbg(dev
, "disabling queued TRIM support\n");
2142 cmds
[ATA_LOG_NCQ_SEND_RECV_DSM_OFFSET
] &=
2143 ~ATA_LOG_NCQ_SEND_RECV_DSM_TRIM
;
2148 static void ata_dev_config_ncq_non_data(struct ata_device
*dev
)
2150 struct ata_port
*ap
= dev
->link
->ap
;
2151 unsigned int err_mask
;
2153 if (!ata_log_supported(dev
, ATA_LOG_NCQ_NON_DATA
)) {
2155 "NCQ Send/Recv Log not supported\n");
2158 err_mask
= ata_read_log_page(dev
, ATA_LOG_NCQ_NON_DATA
,
2159 0, ap
->sector_buf
, 1);
2162 "failed to get NCQ Non-Data Log Emask 0x%x\n",
2165 u8
*cmds
= dev
->ncq_non_data_cmds
;
2167 memcpy(cmds
, ap
->sector_buf
, ATA_LOG_NCQ_NON_DATA_SIZE
);
2171 static void ata_dev_config_ncq_prio(struct ata_device
*dev
)
2173 struct ata_port
*ap
= dev
->link
->ap
;
2174 unsigned int err_mask
;
2176 if (!(dev
->flags
& ATA_DFLAG_NCQ_PRIO_ENABLE
)) {
2177 dev
->flags
&= ~ATA_DFLAG_NCQ_PRIO
;
2181 err_mask
= ata_read_log_page(dev
,
2182 ATA_LOG_IDENTIFY_DEVICE
,
2183 ATA_LOG_SATA_SETTINGS
,
2188 "failed to get Identify Device data, Emask 0x%x\n",
2193 if (ap
->sector_buf
[ATA_LOG_NCQ_PRIO_OFFSET
] & BIT(3)) {
2194 dev
->flags
|= ATA_DFLAG_NCQ_PRIO
;
2196 dev
->flags
&= ~ATA_DFLAG_NCQ_PRIO
;
2197 ata_dev_dbg(dev
, "SATA page does not support priority\n");
2202 static int ata_dev_config_ncq(struct ata_device
*dev
,
2203 char *desc
, size_t desc_sz
)
2205 struct ata_port
*ap
= dev
->link
->ap
;
2206 int hdepth
= 0, ddepth
= ata_id_queue_depth(dev
->id
);
2207 unsigned int err_mask
;
2210 if (!ata_id_has_ncq(dev
->id
)) {
2214 if (!IS_ENABLED(CONFIG_SATA_HOST
))
2216 if (dev
->horkage
& ATA_HORKAGE_NONCQ
) {
2217 snprintf(desc
, desc_sz
, "NCQ (not used)");
2220 if (ap
->flags
& ATA_FLAG_NCQ
) {
2221 hdepth
= min(ap
->scsi_host
->can_queue
, ATA_MAX_QUEUE
);
2222 dev
->flags
|= ATA_DFLAG_NCQ
;
2225 if (!(dev
->horkage
& ATA_HORKAGE_BROKEN_FPDMA_AA
) &&
2226 (ap
->flags
& ATA_FLAG_FPDMA_AA
) &&
2227 ata_id_has_fpdma_aa(dev
->id
)) {
2228 err_mask
= ata_dev_set_feature(dev
, SETFEATURES_SATA_ENABLE
,
2232 "failed to enable AA (error_mask=0x%x)\n",
2234 if (err_mask
!= AC_ERR_DEV
) {
2235 dev
->horkage
|= ATA_HORKAGE_BROKEN_FPDMA_AA
;
2242 if (hdepth
>= ddepth
)
2243 snprintf(desc
, desc_sz
, "NCQ (depth %d)%s", ddepth
, aa_desc
);
2245 snprintf(desc
, desc_sz
, "NCQ (depth %d/%d)%s", hdepth
,
2248 if ((ap
->flags
& ATA_FLAG_FPDMA_AUX
)) {
2249 if (ata_id_has_ncq_send_and_recv(dev
->id
))
2250 ata_dev_config_ncq_send_recv(dev
);
2251 if (ata_id_has_ncq_non_data(dev
->id
))
2252 ata_dev_config_ncq_non_data(dev
);
2253 if (ata_id_has_ncq_prio(dev
->id
))
2254 ata_dev_config_ncq_prio(dev
);
2260 static void ata_dev_config_sense_reporting(struct ata_device
*dev
)
2262 unsigned int err_mask
;
2264 if (!ata_id_has_sense_reporting(dev
->id
))
2267 if (ata_id_sense_reporting_enabled(dev
->id
))
2270 err_mask
= ata_dev_set_feature(dev
, SETFEATURE_SENSE_DATA
, 0x1);
2273 "failed to enable Sense Data Reporting, Emask 0x%x\n",
2278 static void ata_dev_config_zac(struct ata_device
*dev
)
2280 struct ata_port
*ap
= dev
->link
->ap
;
2281 unsigned int err_mask
;
2282 u8
*identify_buf
= ap
->sector_buf
;
2284 dev
->zac_zones_optimal_open
= U32_MAX
;
2285 dev
->zac_zones_optimal_nonseq
= U32_MAX
;
2286 dev
->zac_zones_max_open
= U32_MAX
;
2289 * Always set the 'ZAC' flag for Host-managed devices.
2291 if (dev
->class == ATA_DEV_ZAC
)
2292 dev
->flags
|= ATA_DFLAG_ZAC
;
2293 else if (ata_id_zoned_cap(dev
->id
) == 0x01)
2295 * Check for host-aware devices.
2297 dev
->flags
|= ATA_DFLAG_ZAC
;
2299 if (!(dev
->flags
& ATA_DFLAG_ZAC
))
2302 if (!ata_identify_page_supported(dev
, ATA_LOG_ZONED_INFORMATION
)) {
2304 "ATA Zoned Information Log not supported\n");
2309 * Read IDENTIFY DEVICE data log, page 9 (Zoned-device information)
2311 err_mask
= ata_read_log_page(dev
, ATA_LOG_IDENTIFY_DEVICE
,
2312 ATA_LOG_ZONED_INFORMATION
,
2315 u64 zoned_cap
, opt_open
, opt_nonseq
, max_open
;
2317 zoned_cap
= get_unaligned_le64(&identify_buf
[8]);
2318 if ((zoned_cap
>> 63))
2319 dev
->zac_zoned_cap
= (zoned_cap
& 1);
2320 opt_open
= get_unaligned_le64(&identify_buf
[24]);
2321 if ((opt_open
>> 63))
2322 dev
->zac_zones_optimal_open
= (u32
)opt_open
;
2323 opt_nonseq
= get_unaligned_le64(&identify_buf
[32]);
2324 if ((opt_nonseq
>> 63))
2325 dev
->zac_zones_optimal_nonseq
= (u32
)opt_nonseq
;
2326 max_open
= get_unaligned_le64(&identify_buf
[40]);
2327 if ((max_open
>> 63))
2328 dev
->zac_zones_max_open
= (u32
)max_open
;
2332 static void ata_dev_config_trusted(struct ata_device
*dev
)
2334 struct ata_port
*ap
= dev
->link
->ap
;
2338 if (!ata_id_has_trusted(dev
->id
))
2341 if (!ata_identify_page_supported(dev
, ATA_LOG_SECURITY
)) {
2343 "Security Log not supported\n");
2347 err
= ata_read_log_page(dev
, ATA_LOG_IDENTIFY_DEVICE
, ATA_LOG_SECURITY
,
2351 "failed to read Security Log, Emask 0x%x\n", err
);
2355 trusted_cap
= get_unaligned_le64(&ap
->sector_buf
[40]);
2356 if (!(trusted_cap
& (1ULL << 63))) {
2358 "Trusted Computing capability qword not valid!\n");
2362 if (trusted_cap
& (1 << 0))
2363 dev
->flags
|= ATA_DFLAG_TRUSTED
;
2367 * ata_dev_configure - Configure the specified ATA/ATAPI device
2368 * @dev: Target device to configure
2370 * Configure @dev according to @dev->id. Generic and low-level
2371 * driver specific fixups are also applied.
2374 * Kernel thread context (may sleep)
2377 * 0 on success, -errno otherwise
2379 int ata_dev_configure(struct ata_device
*dev
)
2381 struct ata_port
*ap
= dev
->link
->ap
;
2382 struct ata_eh_context
*ehc
= &dev
->link
->eh_context
;
2383 int print_info
= ehc
->i
.flags
& ATA_EHI_PRINTINFO
;
2384 const u16
*id
= dev
->id
;
2385 unsigned long xfer_mask
;
2386 unsigned int err_mask
;
2387 char revbuf
[7]; /* XYZ-99\0 */
2388 char fwrevbuf
[ATA_ID_FW_REV_LEN
+1];
2389 char modelbuf
[ATA_ID_PROD_LEN
+1];
2392 if (!ata_dev_enabled(dev
) && ata_msg_info(ap
)) {
2393 ata_dev_info(dev
, "%s: ENTER/EXIT -- nodev\n", __func__
);
2397 if (ata_msg_probe(ap
))
2398 ata_dev_dbg(dev
, "%s: ENTER\n", __func__
);
2401 dev
->horkage
|= ata_dev_blacklisted(dev
);
2402 ata_force_horkage(dev
);
2404 if (dev
->horkage
& ATA_HORKAGE_DISABLE
) {
2405 ata_dev_info(dev
, "unsupported device, disabling\n");
2406 ata_dev_disable(dev
);
2410 if ((!atapi_enabled
|| (ap
->flags
& ATA_FLAG_NO_ATAPI
)) &&
2411 dev
->class == ATA_DEV_ATAPI
) {
2412 ata_dev_warn(dev
, "WARNING: ATAPI is %s, device ignored\n",
2413 atapi_enabled
? "not supported with this driver"
2415 ata_dev_disable(dev
);
2419 rc
= ata_do_link_spd_horkage(dev
);
2423 /* some WD SATA-1 drives have issues with LPM, turn on NOLPM for them */
2424 if ((dev
->horkage
& ATA_HORKAGE_WD_BROKEN_LPM
) &&
2425 (id
[ATA_ID_SATA_CAPABILITY
] & 0xe) == 0x2)
2426 dev
->horkage
|= ATA_HORKAGE_NOLPM
;
2428 if (ap
->flags
& ATA_FLAG_NO_LPM
)
2429 dev
->horkage
|= ATA_HORKAGE_NOLPM
;
2431 if (dev
->horkage
& ATA_HORKAGE_NOLPM
) {
2432 ata_dev_warn(dev
, "LPM support broken, forcing max_power\n");
2433 dev
->link
->ap
->target_lpm_policy
= ATA_LPM_MAX_POWER
;
2436 /* let ACPI work its magic */
2437 rc
= ata_acpi_on_devcfg(dev
);
2441 /* massage HPA, do it early as it might change IDENTIFY data */
2442 rc
= ata_hpa_resize(dev
);
2446 /* print device capabilities */
2447 if (ata_msg_probe(ap
))
2449 "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x "
2450 "85:%04x 86:%04x 87:%04x 88:%04x\n",
2452 id
[49], id
[82], id
[83], id
[84],
2453 id
[85], id
[86], id
[87], id
[88]);
2455 /* initialize to-be-configured parameters */
2456 dev
->flags
&= ~ATA_DFLAG_CFG_MASK
;
2457 dev
->max_sectors
= 0;
2463 dev
->multi_count
= 0;
2466 * common ATA, ATAPI feature tests
2469 /* find max transfer mode; for printk only */
2470 xfer_mask
= ata_id_xfermask(id
);
2472 if (ata_msg_probe(ap
))
2475 /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */
2476 ata_id_c_string(dev
->id
, fwrevbuf
, ATA_ID_FW_REV
,
2479 ata_id_c_string(dev
->id
, modelbuf
, ATA_ID_PROD
,
2482 /* ATA-specific feature tests */
2483 if (dev
->class == ATA_DEV_ATA
|| dev
->class == ATA_DEV_ZAC
) {
2484 if (ata_id_is_cfa(id
)) {
2485 /* CPRM may make this media unusable */
2486 if (id
[ATA_ID_CFA_KEY_MGMT
] & 1)
2488 "supports DRM functions and may not be fully accessible\n");
2489 snprintf(revbuf
, 7, "CFA");
2491 snprintf(revbuf
, 7, "ATA-%d", ata_id_major_version(id
));
2492 /* Warn the user if the device has TPM extensions */
2493 if (ata_id_has_tpm(id
))
2495 "supports DRM functions and may not be fully accessible\n");
2498 dev
->n_sectors
= ata_id_n_sectors(id
);
2500 /* get current R/W Multiple count setting */
2501 if ((dev
->id
[47] >> 8) == 0x80 && (dev
->id
[59] & 0x100)) {
2502 unsigned int max
= dev
->id
[47] & 0xff;
2503 unsigned int cnt
= dev
->id
[59] & 0xff;
2504 /* only recognize/allow powers of two here */
2505 if (is_power_of_2(max
) && is_power_of_2(cnt
))
2507 dev
->multi_count
= cnt
;
2510 if (ata_id_has_lba(id
)) {
2511 const char *lba_desc
;
2515 dev
->flags
|= ATA_DFLAG_LBA
;
2516 if (ata_id_has_lba48(id
)) {
2517 dev
->flags
|= ATA_DFLAG_LBA48
;
2520 if (dev
->n_sectors
>= (1UL << 28) &&
2521 ata_id_has_flush_ext(id
))
2522 dev
->flags
|= ATA_DFLAG_FLUSH_EXT
;
2526 rc
= ata_dev_config_ncq(dev
, ncq_desc
, sizeof(ncq_desc
));
2530 /* print device info to dmesg */
2531 if (ata_msg_drv(ap
) && print_info
) {
2532 ata_dev_info(dev
, "%s: %s, %s, max %s\n",
2533 revbuf
, modelbuf
, fwrevbuf
,
2534 ata_mode_string(xfer_mask
));
2536 "%llu sectors, multi %u: %s %s\n",
2537 (unsigned long long)dev
->n_sectors
,
2538 dev
->multi_count
, lba_desc
, ncq_desc
);
2543 /* Default translation */
2544 dev
->cylinders
= id
[1];
2546 dev
->sectors
= id
[6];
2548 if (ata_id_current_chs_valid(id
)) {
2549 /* Current CHS translation is valid. */
2550 dev
->cylinders
= id
[54];
2551 dev
->heads
= id
[55];
2552 dev
->sectors
= id
[56];
2555 /* print device info to dmesg */
2556 if (ata_msg_drv(ap
) && print_info
) {
2557 ata_dev_info(dev
, "%s: %s, %s, max %s\n",
2558 revbuf
, modelbuf
, fwrevbuf
,
2559 ata_mode_string(xfer_mask
));
2561 "%llu sectors, multi %u, CHS %u/%u/%u\n",
2562 (unsigned long long)dev
->n_sectors
,
2563 dev
->multi_count
, dev
->cylinders
,
2564 dev
->heads
, dev
->sectors
);
2568 /* Check and mark DevSlp capability. Get DevSlp timing variables
2569 * from SATA Settings page of Identify Device Data Log.
2571 if (ata_id_has_devslp(dev
->id
)) {
2572 u8
*sata_setting
= ap
->sector_buf
;
2575 dev
->flags
|= ATA_DFLAG_DEVSLP
;
2576 err_mask
= ata_read_log_page(dev
,
2577 ATA_LOG_IDENTIFY_DEVICE
,
2578 ATA_LOG_SATA_SETTINGS
,
2583 "failed to get Identify Device Data, Emask 0x%x\n",
2586 for (i
= 0; i
< ATA_LOG_DEVSLP_SIZE
; i
++) {
2587 j
= ATA_LOG_DEVSLP_OFFSET
+ i
;
2588 dev
->devslp_timing
[i
] = sata_setting
[j
];
2591 ata_dev_config_sense_reporting(dev
);
2592 ata_dev_config_zac(dev
);
2593 ata_dev_config_trusted(dev
);
2597 /* ATAPI-specific feature tests */
2598 else if (dev
->class == ATA_DEV_ATAPI
) {
2599 const char *cdb_intr_string
= "";
2600 const char *atapi_an_string
= "";
2601 const char *dma_dir_string
= "";
2604 rc
= atapi_cdb_len(id
);
2605 if ((rc
< 12) || (rc
> ATAPI_CDB_LEN
)) {
2606 if (ata_msg_warn(ap
))
2607 ata_dev_warn(dev
, "unsupported CDB len\n");
2611 dev
->cdb_len
= (unsigned int) rc
;
2613 /* Enable ATAPI AN if both the host and device have
2614 * the support. If PMP is attached, SNTF is required
2615 * to enable ATAPI AN to discern between PHY status
2616 * changed notifications and ATAPI ANs.
2619 (ap
->flags
& ATA_FLAG_AN
) && ata_id_has_atapi_AN(id
) &&
2620 (!sata_pmp_attached(ap
) ||
2621 sata_scr_read(&ap
->link
, SCR_NOTIFICATION
, &sntf
) == 0)) {
2622 /* issue SET feature command to turn this on */
2623 err_mask
= ata_dev_set_feature(dev
,
2624 SETFEATURES_SATA_ENABLE
, SATA_AN
);
2627 "failed to enable ATAPI AN (err_mask=0x%x)\n",
2630 dev
->flags
|= ATA_DFLAG_AN
;
2631 atapi_an_string
= ", ATAPI AN";
2635 if (ata_id_cdb_intr(dev
->id
)) {
2636 dev
->flags
|= ATA_DFLAG_CDB_INTR
;
2637 cdb_intr_string
= ", CDB intr";
2640 if (atapi_dmadir
|| (dev
->horkage
& ATA_HORKAGE_ATAPI_DMADIR
) || atapi_id_dmadir(dev
->id
)) {
2641 dev
->flags
|= ATA_DFLAG_DMADIR
;
2642 dma_dir_string
= ", DMADIR";
2645 if (ata_id_has_da(dev
->id
)) {
2646 dev
->flags
|= ATA_DFLAG_DA
;
2650 /* print device info to dmesg */
2651 if (ata_msg_drv(ap
) && print_info
)
2653 "ATAPI: %s, %s, max %s%s%s%s\n",
2655 ata_mode_string(xfer_mask
),
2656 cdb_intr_string
, atapi_an_string
,
2660 /* determine max_sectors */
2661 dev
->max_sectors
= ATA_MAX_SECTORS
;
2662 if (dev
->flags
& ATA_DFLAG_LBA48
)
2663 dev
->max_sectors
= ATA_MAX_SECTORS_LBA48
;
2665 /* Limit PATA drive on SATA cable bridge transfers to udma5,
2667 if (ata_dev_knobble(dev
)) {
2668 if (ata_msg_drv(ap
) && print_info
)
2669 ata_dev_info(dev
, "applying bridge limits\n");
2670 dev
->udma_mask
&= ATA_UDMA5
;
2671 dev
->max_sectors
= ATA_MAX_SECTORS
;
2674 if ((dev
->class == ATA_DEV_ATAPI
) &&
2675 (atapi_command_packet_set(id
) == TYPE_TAPE
)) {
2676 dev
->max_sectors
= ATA_MAX_SECTORS_TAPE
;
2677 dev
->horkage
|= ATA_HORKAGE_STUCK_ERR
;
2680 if (dev
->horkage
& ATA_HORKAGE_MAX_SEC_128
)
2681 dev
->max_sectors
= min_t(unsigned int, ATA_MAX_SECTORS_128
,
2684 if (dev
->horkage
& ATA_HORKAGE_MAX_SEC_1024
)
2685 dev
->max_sectors
= min_t(unsigned int, ATA_MAX_SECTORS_1024
,
2688 if (dev
->horkage
& ATA_HORKAGE_MAX_SEC_LBA48
)
2689 dev
->max_sectors
= ATA_MAX_SECTORS_LBA48
;
2691 if (ap
->ops
->dev_config
)
2692 ap
->ops
->dev_config(dev
);
2694 if (dev
->horkage
& ATA_HORKAGE_DIAGNOSTIC
) {
2695 /* Let the user know. We don't want to disallow opens for
2696 rescue purposes, or in case the vendor is just a blithering
2697 idiot. Do this after the dev_config call as some controllers
2698 with buggy firmware may want to avoid reporting false device
2703 "Drive reports diagnostics failure. This may indicate a drive\n");
2705 "fault or invalid emulation. Contact drive vendor for information.\n");
2709 if ((dev
->horkage
& ATA_HORKAGE_FIRMWARE_WARN
) && print_info
) {
2710 ata_dev_warn(dev
, "WARNING: device requires firmware update to be fully functional\n");
2711 ata_dev_warn(dev
, " contact the vendor or visit http://ata.wiki.kernel.org\n");
2717 if (ata_msg_probe(ap
))
2718 ata_dev_dbg(dev
, "%s: EXIT, err\n", __func__
);
2723 * ata_cable_40wire - return 40 wire cable type
2726 * Helper method for drivers which want to hardwire 40 wire cable
2730 int ata_cable_40wire(struct ata_port
*ap
)
2732 return ATA_CBL_PATA40
;
2734 EXPORT_SYMBOL_GPL(ata_cable_40wire
);
2737 * ata_cable_80wire - return 80 wire cable type
2740 * Helper method for drivers which want to hardwire 80 wire cable
2744 int ata_cable_80wire(struct ata_port
*ap
)
2746 return ATA_CBL_PATA80
;
2748 EXPORT_SYMBOL_GPL(ata_cable_80wire
);
2751 * ata_cable_unknown - return unknown PATA cable.
2754 * Helper method for drivers which have no PATA cable detection.
2757 int ata_cable_unknown(struct ata_port
*ap
)
2759 return ATA_CBL_PATA_UNK
;
2761 EXPORT_SYMBOL_GPL(ata_cable_unknown
);
2764 * ata_cable_ignore - return ignored PATA cable.
2767 * Helper method for drivers which don't use cable type to limit
2770 int ata_cable_ignore(struct ata_port
*ap
)
2772 return ATA_CBL_PATA_IGN
;
2774 EXPORT_SYMBOL_GPL(ata_cable_ignore
);
2777 * ata_cable_sata - return SATA cable type
2780 * Helper method for drivers which have SATA cables
2783 int ata_cable_sata(struct ata_port
*ap
)
2785 return ATA_CBL_SATA
;
2787 EXPORT_SYMBOL_GPL(ata_cable_sata
);
2790 * ata_bus_probe - Reset and probe ATA bus
2793 * Master ATA bus probing function. Initiates a hardware-dependent
2794 * bus reset, then attempts to identify any devices found on
2798 * PCI/etc. bus probe sem.
2801 * Zero on success, negative errno otherwise.
2804 int ata_bus_probe(struct ata_port
*ap
)
2806 unsigned int classes
[ATA_MAX_DEVICES
];
2807 int tries
[ATA_MAX_DEVICES
];
2809 struct ata_device
*dev
;
2811 ata_for_each_dev(dev
, &ap
->link
, ALL
)
2812 tries
[dev
->devno
] = ATA_PROBE_MAX_TRIES
;
2815 ata_for_each_dev(dev
, &ap
->link
, ALL
) {
2816 /* If we issue an SRST then an ATA drive (not ATAPI)
2817 * may change configuration and be in PIO0 timing. If
2818 * we do a hard reset (or are coming from power on)
2819 * this is true for ATA or ATAPI. Until we've set a
2820 * suitable controller mode we should not touch the
2821 * bus as we may be talking too fast.
2823 dev
->pio_mode
= XFER_PIO_0
;
2824 dev
->dma_mode
= 0xff;
2826 /* If the controller has a pio mode setup function
2827 * then use it to set the chipset to rights. Don't
2828 * touch the DMA setup as that will be dealt with when
2829 * configuring devices.
2831 if (ap
->ops
->set_piomode
)
2832 ap
->ops
->set_piomode(ap
, dev
);
2835 /* reset and determine device classes */
2836 ap
->ops
->phy_reset(ap
);
2838 ata_for_each_dev(dev
, &ap
->link
, ALL
) {
2839 if (dev
->class != ATA_DEV_UNKNOWN
)
2840 classes
[dev
->devno
] = dev
->class;
2842 classes
[dev
->devno
] = ATA_DEV_NONE
;
2844 dev
->class = ATA_DEV_UNKNOWN
;
2847 /* read IDENTIFY page and configure devices. We have to do the identify
2848 specific sequence bass-ackwards so that PDIAG- is released by
2851 ata_for_each_dev(dev
, &ap
->link
, ALL_REVERSE
) {
2852 if (tries
[dev
->devno
])
2853 dev
->class = classes
[dev
->devno
];
2855 if (!ata_dev_enabled(dev
))
2858 rc
= ata_dev_read_id(dev
, &dev
->class, ATA_READID_POSTRESET
,
2864 /* Now ask for the cable type as PDIAG- should have been released */
2865 if (ap
->ops
->cable_detect
)
2866 ap
->cbl
= ap
->ops
->cable_detect(ap
);
2868 /* We may have SATA bridge glue hiding here irrespective of
2869 * the reported cable types and sensed types. When SATA
2870 * drives indicate we have a bridge, we don't know which end
2871 * of the link the bridge is which is a problem.
2873 ata_for_each_dev(dev
, &ap
->link
, ENABLED
)
2874 if (ata_id_is_sata(dev
->id
))
2875 ap
->cbl
= ATA_CBL_SATA
;
2877 /* After the identify sequence we can now set up the devices. We do
2878 this in the normal order so that the user doesn't get confused */
2880 ata_for_each_dev(dev
, &ap
->link
, ENABLED
) {
2881 ap
->link
.eh_context
.i
.flags
|= ATA_EHI_PRINTINFO
;
2882 rc
= ata_dev_configure(dev
);
2883 ap
->link
.eh_context
.i
.flags
&= ~ATA_EHI_PRINTINFO
;
2888 /* configure transfer mode */
2889 rc
= ata_set_mode(&ap
->link
, &dev
);
2893 ata_for_each_dev(dev
, &ap
->link
, ENABLED
)
2899 tries
[dev
->devno
]--;
2903 /* eeek, something went very wrong, give up */
2904 tries
[dev
->devno
] = 0;
2908 /* give it just one more chance */
2909 tries
[dev
->devno
] = min(tries
[dev
->devno
], 1);
2912 if (tries
[dev
->devno
] == 1) {
2913 /* This is the last chance, better to slow
2914 * down than lose it.
2916 sata_down_spd_limit(&ap
->link
, 0);
2917 ata_down_xfermask_limit(dev
, ATA_DNXFER_PIO
);
2921 if (!tries
[dev
->devno
])
2922 ata_dev_disable(dev
);
2928 * sata_print_link_status - Print SATA link status
2929 * @link: SATA link to printk link status about
2931 * This function prints link speed and status of a SATA link.
2936 static void sata_print_link_status(struct ata_link
*link
)
2938 u32 sstatus
, scontrol
, tmp
;
2940 if (sata_scr_read(link
, SCR_STATUS
, &sstatus
))
2942 sata_scr_read(link
, SCR_CONTROL
, &scontrol
);
2944 if (ata_phys_link_online(link
)) {
2945 tmp
= (sstatus
>> 4) & 0xf;
2946 ata_link_info(link
, "SATA link up %s (SStatus %X SControl %X)\n",
2947 sata_spd_string(tmp
), sstatus
, scontrol
);
2949 ata_link_info(link
, "SATA link down (SStatus %X SControl %X)\n",
2955 * ata_dev_pair - return other device on cable
2958 * Obtain the other device on the same cable, or if none is
2959 * present NULL is returned
2962 struct ata_device
*ata_dev_pair(struct ata_device
*adev
)
2964 struct ata_link
*link
= adev
->link
;
2965 struct ata_device
*pair
= &link
->device
[1 - adev
->devno
];
2966 if (!ata_dev_enabled(pair
))
2970 EXPORT_SYMBOL_GPL(ata_dev_pair
);
2973 * sata_down_spd_limit - adjust SATA spd limit downward
2974 * @link: Link to adjust SATA spd limit for
2975 * @spd_limit: Additional limit
2977 * Adjust SATA spd limit of @link downward. Note that this
2978 * function only adjusts the limit. The change must be applied
2979 * using sata_set_spd().
2981 * If @spd_limit is non-zero, the speed is limited to equal to or
2982 * lower than @spd_limit if such speed is supported. If
2983 * @spd_limit is slower than any supported speed, only the lowest
2984 * supported speed is allowed.
2987 * Inherited from caller.
2990 * 0 on success, negative errno on failure
2992 int sata_down_spd_limit(struct ata_link
*link
, u32 spd_limit
)
2994 u32 sstatus
, spd
, mask
;
2997 if (!sata_scr_valid(link
))
3000 /* If SCR can be read, use it to determine the current SPD.
3001 * If not, use cached value in link->sata_spd.
3003 rc
= sata_scr_read(link
, SCR_STATUS
, &sstatus
);
3004 if (rc
== 0 && ata_sstatus_online(sstatus
))
3005 spd
= (sstatus
>> 4) & 0xf;
3007 spd
= link
->sata_spd
;
3009 mask
= link
->sata_spd_limit
;
3013 /* unconditionally mask off the highest bit */
3014 bit
= fls(mask
) - 1;
3015 mask
&= ~(1 << bit
);
3018 * Mask off all speeds higher than or equal to the current one. At
3019 * this point, if current SPD is not available and we previously
3020 * recorded the link speed from SStatus, the driver has already
3021 * masked off the highest bit so mask should already be 1 or 0.
3022 * Otherwise, we should not force 1.5Gbps on a link where we have
3023 * not previously recorded speed from SStatus. Just return in this
3027 mask
&= (1 << (spd
- 1)) - 1;
3031 /* were we already at the bottom? */
3036 if (mask
& ((1 << spd_limit
) - 1))
3037 mask
&= (1 << spd_limit
) - 1;
3039 bit
= ffs(mask
) - 1;
3044 link
->sata_spd_limit
= mask
;
3046 ata_link_warn(link
, "limiting SATA link speed to %s\n",
3047 sata_spd_string(fls(mask
)));
3052 #ifdef CONFIG_ATA_ACPI
3054 * ata_timing_cycle2mode - find xfer mode for the specified cycle duration
3055 * @xfer_shift: ATA_SHIFT_* value for transfer type to examine.
3056 * @cycle: cycle duration in ns
3058 * Return matching xfer mode for @cycle. The returned mode is of
3059 * the transfer type specified by @xfer_shift. If @cycle is too
3060 * slow for @xfer_shift, 0xff is returned. If @cycle is faster
3061 * than the fastest known mode, the fasted mode is returned.
3067 * Matching xfer_mode, 0xff if no match found.
3069 u8
ata_timing_cycle2mode(unsigned int xfer_shift
, int cycle
)
3071 u8 base_mode
= 0xff, last_mode
= 0xff;
3072 const struct ata_xfer_ent
*ent
;
3073 const struct ata_timing
*t
;
3075 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
3076 if (ent
->shift
== xfer_shift
)
3077 base_mode
= ent
->base
;
3079 for (t
= ata_timing_find_mode(base_mode
);
3080 t
&& ata_xfer_mode2shift(t
->mode
) == xfer_shift
; t
++) {
3081 unsigned short this_cycle
;
3083 switch (xfer_shift
) {
3085 case ATA_SHIFT_MWDMA
:
3086 this_cycle
= t
->cycle
;
3088 case ATA_SHIFT_UDMA
:
3089 this_cycle
= t
->udma
;
3095 if (cycle
> this_cycle
)
3098 last_mode
= t
->mode
;
3106 * ata_down_xfermask_limit - adjust dev xfer masks downward
3107 * @dev: Device to adjust xfer masks
3108 * @sel: ATA_DNXFER_* selector
3110 * Adjust xfer masks of @dev downward. Note that this function
3111 * does not apply the change. Invoking ata_set_mode() afterwards
3112 * will apply the limit.
3115 * Inherited from caller.
3118 * 0 on success, negative errno on failure
3120 int ata_down_xfermask_limit(struct ata_device
*dev
, unsigned int sel
)
3123 unsigned long orig_mask
, xfer_mask
;
3124 unsigned long pio_mask
, mwdma_mask
, udma_mask
;
3127 quiet
= !!(sel
& ATA_DNXFER_QUIET
);
3128 sel
&= ~ATA_DNXFER_QUIET
;
3130 xfer_mask
= orig_mask
= ata_pack_xfermask(dev
->pio_mask
,
3133 ata_unpack_xfermask(xfer_mask
, &pio_mask
, &mwdma_mask
, &udma_mask
);
3136 case ATA_DNXFER_PIO
:
3137 highbit
= fls(pio_mask
) - 1;
3138 pio_mask
&= ~(1 << highbit
);
3141 case ATA_DNXFER_DMA
:
3143 highbit
= fls(udma_mask
) - 1;
3144 udma_mask
&= ~(1 << highbit
);
3147 } else if (mwdma_mask
) {
3148 highbit
= fls(mwdma_mask
) - 1;
3149 mwdma_mask
&= ~(1 << highbit
);
3155 case ATA_DNXFER_40C
:
3156 udma_mask
&= ATA_UDMA_MASK_40C
;
3159 case ATA_DNXFER_FORCE_PIO0
:
3162 case ATA_DNXFER_FORCE_PIO
:
3171 xfer_mask
&= ata_pack_xfermask(pio_mask
, mwdma_mask
, udma_mask
);
3173 if (!(xfer_mask
& ATA_MASK_PIO
) || xfer_mask
== orig_mask
)
3177 if (xfer_mask
& (ATA_MASK_MWDMA
| ATA_MASK_UDMA
))
3178 snprintf(buf
, sizeof(buf
), "%s:%s",
3179 ata_mode_string(xfer_mask
),
3180 ata_mode_string(xfer_mask
& ATA_MASK_PIO
));
3182 snprintf(buf
, sizeof(buf
), "%s",
3183 ata_mode_string(xfer_mask
));
3185 ata_dev_warn(dev
, "limiting speed to %s\n", buf
);
3188 ata_unpack_xfermask(xfer_mask
, &dev
->pio_mask
, &dev
->mwdma_mask
,
3194 static int ata_dev_set_mode(struct ata_device
*dev
)
3196 struct ata_port
*ap
= dev
->link
->ap
;
3197 struct ata_eh_context
*ehc
= &dev
->link
->eh_context
;
3198 const bool nosetxfer
= dev
->horkage
& ATA_HORKAGE_NOSETXFER
;
3199 const char *dev_err_whine
= "";
3200 int ign_dev_err
= 0;
3201 unsigned int err_mask
= 0;
3204 dev
->flags
&= ~ATA_DFLAG_PIO
;
3205 if (dev
->xfer_shift
== ATA_SHIFT_PIO
)
3206 dev
->flags
|= ATA_DFLAG_PIO
;
3208 if (nosetxfer
&& ap
->flags
& ATA_FLAG_SATA
&& ata_id_is_sata(dev
->id
))
3209 dev_err_whine
= " (SET_XFERMODE skipped)";
3213 "NOSETXFER but PATA detected - can't "
3214 "skip SETXFER, might malfunction\n");
3215 err_mask
= ata_dev_set_xfermode(dev
);
3218 if (err_mask
& ~AC_ERR_DEV
)
3222 ehc
->i
.flags
|= ATA_EHI_POST_SETMODE
;
3223 rc
= ata_dev_revalidate(dev
, ATA_DEV_UNKNOWN
, 0);
3224 ehc
->i
.flags
&= ~ATA_EHI_POST_SETMODE
;
3228 if (dev
->xfer_shift
== ATA_SHIFT_PIO
) {
3229 /* Old CFA may refuse this command, which is just fine */
3230 if (ata_id_is_cfa(dev
->id
))
3232 /* Catch several broken garbage emulations plus some pre
3234 if (ata_id_major_version(dev
->id
) == 0 &&
3235 dev
->pio_mode
<= XFER_PIO_2
)
3237 /* Some very old devices and some bad newer ones fail
3238 any kind of SET_XFERMODE request but support PIO0-2
3239 timings and no IORDY */
3240 if (!ata_id_has_iordy(dev
->id
) && dev
->pio_mode
<= XFER_PIO_2
)
3243 /* Early MWDMA devices do DMA but don't allow DMA mode setting.
3244 Don't fail an MWDMA0 set IFF the device indicates it is in MWDMA0 */
3245 if (dev
->xfer_shift
== ATA_SHIFT_MWDMA
&&
3246 dev
->dma_mode
== XFER_MW_DMA_0
&&
3247 (dev
->id
[63] >> 8) & 1)
3250 /* if the device is actually configured correctly, ignore dev err */
3251 if (dev
->xfer_mode
== ata_xfer_mask2mode(ata_id_xfermask(dev
->id
)))
3254 if (err_mask
& AC_ERR_DEV
) {
3258 dev_err_whine
= " (device error ignored)";
3261 DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
3262 dev
->xfer_shift
, (int)dev
->xfer_mode
);
3264 if (!(ehc
->i
.flags
& ATA_EHI_QUIET
) ||
3265 ehc
->i
.flags
& ATA_EHI_DID_HARDRESET
)
3266 ata_dev_info(dev
, "configured for %s%s\n",
3267 ata_mode_string(ata_xfer_mode2mask(dev
->xfer_mode
)),
3273 ata_dev_err(dev
, "failed to set xfermode (err_mask=0x%x)\n", err_mask
);
3278 * ata_do_set_mode - Program timings and issue SET FEATURES - XFER
3279 * @link: link on which timings will be programmed
3280 * @r_failed_dev: out parameter for failed device
3282 * Standard implementation of the function used to tune and set
3283 * ATA device disk transfer mode (PIO3, UDMA6, etc.). If
3284 * ata_dev_set_mode() fails, pointer to the failing device is
3285 * returned in @r_failed_dev.
3288 * PCI/etc. bus probe sem.
3291 * 0 on success, negative errno otherwise
3294 int ata_do_set_mode(struct ata_link
*link
, struct ata_device
**r_failed_dev
)
3296 struct ata_port
*ap
= link
->ap
;
3297 struct ata_device
*dev
;
3298 int rc
= 0, used_dma
= 0, found
= 0;
3300 /* step 1: calculate xfer_mask */
3301 ata_for_each_dev(dev
, link
, ENABLED
) {
3302 unsigned long pio_mask
, dma_mask
;
3303 unsigned int mode_mask
;
3305 mode_mask
= ATA_DMA_MASK_ATA
;
3306 if (dev
->class == ATA_DEV_ATAPI
)
3307 mode_mask
= ATA_DMA_MASK_ATAPI
;
3308 else if (ata_id_is_cfa(dev
->id
))
3309 mode_mask
= ATA_DMA_MASK_CFA
;
3311 ata_dev_xfermask(dev
);
3312 ata_force_xfermask(dev
);
3314 pio_mask
= ata_pack_xfermask(dev
->pio_mask
, 0, 0);
3316 if (libata_dma_mask
& mode_mask
)
3317 dma_mask
= ata_pack_xfermask(0, dev
->mwdma_mask
,
3322 dev
->pio_mode
= ata_xfer_mask2mode(pio_mask
);
3323 dev
->dma_mode
= ata_xfer_mask2mode(dma_mask
);
3326 if (ata_dma_enabled(dev
))
3332 /* step 2: always set host PIO timings */
3333 ata_for_each_dev(dev
, link
, ENABLED
) {
3334 if (dev
->pio_mode
== 0xff) {
3335 ata_dev_warn(dev
, "no PIO support\n");
3340 dev
->xfer_mode
= dev
->pio_mode
;
3341 dev
->xfer_shift
= ATA_SHIFT_PIO
;
3342 if (ap
->ops
->set_piomode
)
3343 ap
->ops
->set_piomode(ap
, dev
);
3346 /* step 3: set host DMA timings */
3347 ata_for_each_dev(dev
, link
, ENABLED
) {
3348 if (!ata_dma_enabled(dev
))
3351 dev
->xfer_mode
= dev
->dma_mode
;
3352 dev
->xfer_shift
= ata_xfer_mode2shift(dev
->dma_mode
);
3353 if (ap
->ops
->set_dmamode
)
3354 ap
->ops
->set_dmamode(ap
, dev
);
3357 /* step 4: update devices' xfer mode */
3358 ata_for_each_dev(dev
, link
, ENABLED
) {
3359 rc
= ata_dev_set_mode(dev
);
3364 /* Record simplex status. If we selected DMA then the other
3365 * host channels are not permitted to do so.
3367 if (used_dma
&& (ap
->host
->flags
& ATA_HOST_SIMPLEX
))
3368 ap
->host
->simplex_claimed
= ap
;
3372 *r_failed_dev
= dev
;
3375 EXPORT_SYMBOL_GPL(ata_do_set_mode
);
3378 * ata_wait_ready - wait for link to become ready
3379 * @link: link to be waited on
3380 * @deadline: deadline jiffies for the operation
3381 * @check_ready: callback to check link readiness
3383 * Wait for @link to become ready. @check_ready should return
3384 * positive number if @link is ready, 0 if it isn't, -ENODEV if
3385 * link doesn't seem to be occupied, other errno for other error
3388 * Transient -ENODEV conditions are allowed for
3389 * ATA_TMOUT_FF_WAIT.
3395 * 0 if @link is ready before @deadline; otherwise, -errno.
3397 int ata_wait_ready(struct ata_link
*link
, unsigned long deadline
,
3398 int (*check_ready
)(struct ata_link
*link
))
3400 unsigned long start
= jiffies
;
3401 unsigned long nodev_deadline
;
3404 /* choose which 0xff timeout to use, read comment in libata.h */
3405 if (link
->ap
->host
->flags
& ATA_HOST_PARALLEL_SCAN
)
3406 nodev_deadline
= ata_deadline(start
, ATA_TMOUT_FF_WAIT_LONG
);
3408 nodev_deadline
= ata_deadline(start
, ATA_TMOUT_FF_WAIT
);
3410 /* Slave readiness can't be tested separately from master. On
3411 * M/S emulation configuration, this function should be called
3412 * only on the master and it will handle both master and slave.
3414 WARN_ON(link
== link
->ap
->slave_link
);
3416 if (time_after(nodev_deadline
, deadline
))
3417 nodev_deadline
= deadline
;
3420 unsigned long now
= jiffies
;
3423 ready
= tmp
= check_ready(link
);
3428 * -ENODEV could be transient. Ignore -ENODEV if link
3429 * is online. Also, some SATA devices take a long
3430 * time to clear 0xff after reset. Wait for
3431 * ATA_TMOUT_FF_WAIT[_LONG] on -ENODEV if link isn't
3434 * Note that some PATA controllers (pata_ali) explode
3435 * if status register is read more than once when
3436 * there's no device attached.
3438 if (ready
== -ENODEV
) {
3439 if (ata_link_online(link
))
3441 else if ((link
->ap
->flags
& ATA_FLAG_SATA
) &&
3442 !ata_link_offline(link
) &&
3443 time_before(now
, nodev_deadline
))
3449 if (time_after(now
, deadline
))
3452 if (!warned
&& time_after(now
, start
+ 5 * HZ
) &&
3453 (deadline
- now
> 3 * HZ
)) {
3455 "link is slow to respond, please be patient "
3456 "(ready=%d)\n", tmp
);
3460 ata_msleep(link
->ap
, 50);
3465 * ata_wait_after_reset - wait for link to become ready after reset
3466 * @link: link to be waited on
3467 * @deadline: deadline jiffies for the operation
3468 * @check_ready: callback to check link readiness
3470 * Wait for @link to become ready after reset.
3476 * 0 if @link is ready before @deadline; otherwise, -errno.
3478 int ata_wait_after_reset(struct ata_link
*link
, unsigned long deadline
,
3479 int (*check_ready
)(struct ata_link
*link
))
3481 ata_msleep(link
->ap
, ATA_WAIT_AFTER_RESET
);
3483 return ata_wait_ready(link
, deadline
, check_ready
);
3485 EXPORT_SYMBOL_GPL(ata_wait_after_reset
);
3488 * ata_std_prereset - prepare for reset
3489 * @link: ATA link to be reset
3490 * @deadline: deadline jiffies for the operation
3492 * @link is about to be reset. Initialize it. Failure from
3493 * prereset makes libata abort whole reset sequence and give up
3494 * that port, so prereset should be best-effort. It does its
3495 * best to prepare for reset sequence but if things go wrong, it
3496 * should just whine, not fail.
3499 * Kernel thread context (may sleep)
3502 * 0 on success, -errno otherwise.
3504 int ata_std_prereset(struct ata_link
*link
, unsigned long deadline
)
3506 struct ata_port
*ap
= link
->ap
;
3507 struct ata_eh_context
*ehc
= &link
->eh_context
;
3508 const unsigned long *timing
= sata_ehc_deb_timing(ehc
);
3511 /* if we're about to do hardreset, nothing more to do */
3512 if (ehc
->i
.action
& ATA_EH_HARDRESET
)
3515 /* if SATA, resume link */
3516 if (ap
->flags
& ATA_FLAG_SATA
) {
3517 rc
= sata_link_resume(link
, timing
, deadline
);
3518 /* whine about phy resume failure but proceed */
3519 if (rc
&& rc
!= -EOPNOTSUPP
)
3521 "failed to resume link for reset (errno=%d)\n",
3525 /* no point in trying softreset on offline link */
3526 if (ata_phys_link_offline(link
))
3527 ehc
->i
.action
&= ~ATA_EH_SOFTRESET
;
3531 EXPORT_SYMBOL_GPL(ata_std_prereset
);
3534 * sata_std_hardreset - COMRESET w/o waiting or classification
3535 * @link: link to reset
3536 * @class: resulting class of attached device
3537 * @deadline: deadline jiffies for the operation
3539 * Standard SATA COMRESET w/o waiting or classification.
3542 * Kernel thread context (may sleep)
3545 * 0 if link offline, -EAGAIN if link online, -errno on errors.
3547 int sata_std_hardreset(struct ata_link
*link
, unsigned int *class,
3548 unsigned long deadline
)
3550 const unsigned long *timing
= sata_ehc_deb_timing(&link
->eh_context
);
3555 rc
= sata_link_hardreset(link
, timing
, deadline
, &online
, NULL
);
3556 return online
? -EAGAIN
: rc
;
3558 EXPORT_SYMBOL_GPL(sata_std_hardreset
);
3561 * ata_std_postreset - standard postreset callback
3562 * @link: the target ata_link
3563 * @classes: classes of attached devices
3565 * This function is invoked after a successful reset. Note that
3566 * the device might have been reset more than once using
3567 * different reset methods before postreset is invoked.
3570 * Kernel thread context (may sleep)
3572 void ata_std_postreset(struct ata_link
*link
, unsigned int *classes
)
3578 /* reset complete, clear SError */
3579 if (!sata_scr_read(link
, SCR_ERROR
, &serror
))
3580 sata_scr_write(link
, SCR_ERROR
, serror
);
3582 /* print link status */
3583 sata_print_link_status(link
);
3587 EXPORT_SYMBOL_GPL(ata_std_postreset
);
3590 * ata_dev_same_device - Determine whether new ID matches configured device
3591 * @dev: device to compare against
3592 * @new_class: class of the new device
3593 * @new_id: IDENTIFY page of the new device
3595 * Compare @new_class and @new_id against @dev and determine
3596 * whether @dev is the device indicated by @new_class and
3603 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
3605 static int ata_dev_same_device(struct ata_device
*dev
, unsigned int new_class
,
3608 const u16
*old_id
= dev
->id
;
3609 unsigned char model
[2][ATA_ID_PROD_LEN
+ 1];
3610 unsigned char serial
[2][ATA_ID_SERNO_LEN
+ 1];
3612 if (dev
->class != new_class
) {
3613 ata_dev_info(dev
, "class mismatch %d != %d\n",
3614 dev
->class, new_class
);
3618 ata_id_c_string(old_id
, model
[0], ATA_ID_PROD
, sizeof(model
[0]));
3619 ata_id_c_string(new_id
, model
[1], ATA_ID_PROD
, sizeof(model
[1]));
3620 ata_id_c_string(old_id
, serial
[0], ATA_ID_SERNO
, sizeof(serial
[0]));
3621 ata_id_c_string(new_id
, serial
[1], ATA_ID_SERNO
, sizeof(serial
[1]));
3623 if (strcmp(model
[0], model
[1])) {
3624 ata_dev_info(dev
, "model number mismatch '%s' != '%s'\n",
3625 model
[0], model
[1]);
3629 if (strcmp(serial
[0], serial
[1])) {
3630 ata_dev_info(dev
, "serial number mismatch '%s' != '%s'\n",
3631 serial
[0], serial
[1]);
3639 * ata_dev_reread_id - Re-read IDENTIFY data
3640 * @dev: target ATA device
3641 * @readid_flags: read ID flags
3643 * Re-read IDENTIFY page and make sure @dev is still attached to
3647 * Kernel thread context (may sleep)
3650 * 0 on success, negative errno otherwise
3652 int ata_dev_reread_id(struct ata_device
*dev
, unsigned int readid_flags
)
3654 unsigned int class = dev
->class;
3655 u16
*id
= (void *)dev
->link
->ap
->sector_buf
;
3659 rc
= ata_dev_read_id(dev
, &class, readid_flags
, id
);
3663 /* is the device still there? */
3664 if (!ata_dev_same_device(dev
, class, id
))
3667 memcpy(dev
->id
, id
, sizeof(id
[0]) * ATA_ID_WORDS
);
3672 * ata_dev_revalidate - Revalidate ATA device
3673 * @dev: device to revalidate
3674 * @new_class: new class code
3675 * @readid_flags: read ID flags
3677 * Re-read IDENTIFY page, make sure @dev is still attached to the
3678 * port and reconfigure it according to the new IDENTIFY page.
3681 * Kernel thread context (may sleep)
3684 * 0 on success, negative errno otherwise
3686 int ata_dev_revalidate(struct ata_device
*dev
, unsigned int new_class
,
3687 unsigned int readid_flags
)
3689 u64 n_sectors
= dev
->n_sectors
;
3690 u64 n_native_sectors
= dev
->n_native_sectors
;
3693 if (!ata_dev_enabled(dev
))
3696 /* fail early if !ATA && !ATAPI to avoid issuing [P]IDENTIFY to PMP */
3697 if (ata_class_enabled(new_class
) &&
3698 new_class
!= ATA_DEV_ATA
&&
3699 new_class
!= ATA_DEV_ATAPI
&&
3700 new_class
!= ATA_DEV_ZAC
&&
3701 new_class
!= ATA_DEV_SEMB
) {
3702 ata_dev_info(dev
, "class mismatch %u != %u\n",
3703 dev
->class, new_class
);
3709 rc
= ata_dev_reread_id(dev
, readid_flags
);
3713 /* configure device according to the new ID */
3714 rc
= ata_dev_configure(dev
);
3718 /* verify n_sectors hasn't changed */
3719 if (dev
->class != ATA_DEV_ATA
|| !n_sectors
||
3720 dev
->n_sectors
== n_sectors
)
3723 /* n_sectors has changed */
3724 ata_dev_warn(dev
, "n_sectors mismatch %llu != %llu\n",
3725 (unsigned long long)n_sectors
,
3726 (unsigned long long)dev
->n_sectors
);
3729 * Something could have caused HPA to be unlocked
3730 * involuntarily. If n_native_sectors hasn't changed and the
3731 * new size matches it, keep the device.
3733 if (dev
->n_native_sectors
== n_native_sectors
&&
3734 dev
->n_sectors
> n_sectors
&& dev
->n_sectors
== n_native_sectors
) {
3736 "new n_sectors matches native, probably "
3737 "late HPA unlock, n_sectors updated\n");
3738 /* use the larger n_sectors */
3743 * Some BIOSes boot w/o HPA but resume w/ HPA locked. Try
3744 * unlocking HPA in those cases.
3746 * https://bugzilla.kernel.org/show_bug.cgi?id=15396
3748 if (dev
->n_native_sectors
== n_native_sectors
&&
3749 dev
->n_sectors
< n_sectors
&& n_sectors
== n_native_sectors
&&
3750 !(dev
->horkage
& ATA_HORKAGE_BROKEN_HPA
)) {
3752 "old n_sectors matches native, probably "
3753 "late HPA lock, will try to unlock HPA\n");
3754 /* try unlocking HPA */
3755 dev
->flags
|= ATA_DFLAG_UNLOCK_HPA
;
3760 /* restore original n_[native_]sectors and fail */
3761 dev
->n_native_sectors
= n_native_sectors
;
3762 dev
->n_sectors
= n_sectors
;
3764 ata_dev_err(dev
, "revalidation failed (errno=%d)\n", rc
);
3768 struct ata_blacklist_entry
{
3769 const char *model_num
;
3770 const char *model_rev
;
3771 unsigned long horkage
;
3774 static const struct ata_blacklist_entry ata_device_blacklist
[] = {
3775 /* Devices with DMA related problems under Linux */
3776 { "WDC AC11000H", NULL
, ATA_HORKAGE_NODMA
},
3777 { "WDC AC22100H", NULL
, ATA_HORKAGE_NODMA
},
3778 { "WDC AC32500H", NULL
, ATA_HORKAGE_NODMA
},
3779 { "WDC AC33100H", NULL
, ATA_HORKAGE_NODMA
},
3780 { "WDC AC31600H", NULL
, ATA_HORKAGE_NODMA
},
3781 { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA
},
3782 { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA
},
3783 { "Compaq CRD-8241B", NULL
, ATA_HORKAGE_NODMA
},
3784 { "CRD-8400B", NULL
, ATA_HORKAGE_NODMA
},
3785 { "CRD-848[02]B", NULL
, ATA_HORKAGE_NODMA
},
3786 { "CRD-84", NULL
, ATA_HORKAGE_NODMA
},
3787 { "SanDisk SDP3B", NULL
, ATA_HORKAGE_NODMA
},
3788 { "SanDisk SDP3B-64", NULL
, ATA_HORKAGE_NODMA
},
3789 { "SANYO CD-ROM CRD", NULL
, ATA_HORKAGE_NODMA
},
3790 { "HITACHI CDR-8", NULL
, ATA_HORKAGE_NODMA
},
3791 { "HITACHI CDR-8[34]35",NULL
, ATA_HORKAGE_NODMA
},
3792 { "Toshiba CD-ROM XM-6202B", NULL
, ATA_HORKAGE_NODMA
},
3793 { "TOSHIBA CD-ROM XM-1702BC", NULL
, ATA_HORKAGE_NODMA
},
3794 { "CD-532E-A", NULL
, ATA_HORKAGE_NODMA
},
3795 { "E-IDE CD-ROM CR-840",NULL
, ATA_HORKAGE_NODMA
},
3796 { "CD-ROM Drive/F5A", NULL
, ATA_HORKAGE_NODMA
},
3797 { "WPI CDD-820", NULL
, ATA_HORKAGE_NODMA
},
3798 { "SAMSUNG CD-ROM SC-148C", NULL
, ATA_HORKAGE_NODMA
},
3799 { "SAMSUNG CD-ROM SC", NULL
, ATA_HORKAGE_NODMA
},
3800 { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL
,ATA_HORKAGE_NODMA
},
3801 { "_NEC DV5800A", NULL
, ATA_HORKAGE_NODMA
},
3802 { "SAMSUNG CD-ROM SN-124", "N001", ATA_HORKAGE_NODMA
},
3803 { "Seagate STT20000A", NULL
, ATA_HORKAGE_NODMA
},
3804 { " 2GB ATA Flash Disk", "ADMA428M", ATA_HORKAGE_NODMA
},
3805 { "VRFDFC22048UCHC-TE*", NULL
, ATA_HORKAGE_NODMA
},
3806 /* Odd clown on sil3726/4726 PMPs */
3807 { "Config Disk", NULL
, ATA_HORKAGE_DISABLE
},
3809 /* Weird ATAPI devices */
3810 { "TORiSAN DVD-ROM DRD-N216", NULL
, ATA_HORKAGE_MAX_SEC_128
},
3811 { "QUANTUM DAT DAT72-000", NULL
, ATA_HORKAGE_ATAPI_MOD16_DMA
},
3812 { "Slimtype DVD A DS8A8SH", NULL
, ATA_HORKAGE_MAX_SEC_LBA48
},
3813 { "Slimtype DVD A DS8A9SH", NULL
, ATA_HORKAGE_MAX_SEC_LBA48
},
3816 * Causes silent data corruption with higher max sects.
3817 * http://lkml.kernel.org/g/x49wpy40ysk.fsf@segfault.boston.devel.redhat.com
3819 { "ST380013AS", "3.20", ATA_HORKAGE_MAX_SEC_1024
},
3822 * These devices time out with higher max sects.
3823 * https://bugzilla.kernel.org/show_bug.cgi?id=121671
3825 { "LITEON CX1-JB*-HP", NULL
, ATA_HORKAGE_MAX_SEC_1024
},
3826 { "LITEON EP1-*", NULL
, ATA_HORKAGE_MAX_SEC_1024
},
3828 /* Devices we expect to fail diagnostics */
3830 /* Devices where NCQ should be avoided */
3832 { "WDC WD740ADFD-00", NULL
, ATA_HORKAGE_NONCQ
},
3833 { "WDC WD740ADFD-00NLR1", NULL
, ATA_HORKAGE_NONCQ
, },
3834 /* http://thread.gmane.org/gmane.linux.ide/14907 */
3835 { "FUJITSU MHT2060BH", NULL
, ATA_HORKAGE_NONCQ
},
3837 { "Maxtor *", "BANC*", ATA_HORKAGE_NONCQ
},
3838 { "Maxtor 7V300F0", "VA111630", ATA_HORKAGE_NONCQ
},
3839 { "ST380817AS", "3.42", ATA_HORKAGE_NONCQ
},
3840 { "ST3160023AS", "3.42", ATA_HORKAGE_NONCQ
},
3841 { "OCZ CORE_SSD", "02.10104", ATA_HORKAGE_NONCQ
},
3843 /* Seagate NCQ + FLUSH CACHE firmware bug */
3844 { "ST31500341AS", "SD1[5-9]", ATA_HORKAGE_NONCQ
|
3845 ATA_HORKAGE_FIRMWARE_WARN
},
3847 { "ST31000333AS", "SD1[5-9]", ATA_HORKAGE_NONCQ
|
3848 ATA_HORKAGE_FIRMWARE_WARN
},
3850 { "ST3640[36]23AS", "SD1[5-9]", ATA_HORKAGE_NONCQ
|
3851 ATA_HORKAGE_FIRMWARE_WARN
},
3853 { "ST3320[68]13AS", "SD1[5-9]", ATA_HORKAGE_NONCQ
|
3854 ATA_HORKAGE_FIRMWARE_WARN
},
3856 /* drives which fail FPDMA_AA activation (some may freeze afterwards)
3857 the ST disks also have LPM issues */
3858 { "ST1000LM024 HN-M101MBB", NULL
, ATA_HORKAGE_BROKEN_FPDMA_AA
|
3859 ATA_HORKAGE_NOLPM
, },
3860 { "VB0250EAVER", "HPG7", ATA_HORKAGE_BROKEN_FPDMA_AA
},
3862 /* Blacklist entries taken from Silicon Image 3124/3132
3863 Windows driver .inf file - also several Linux problem reports */
3864 { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ
, },
3865 { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ
, },
3866 { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ
, },
3868 /* https://bugzilla.kernel.org/show_bug.cgi?id=15573 */
3869 { "C300-CTFDDAC128MAG", "0001", ATA_HORKAGE_NONCQ
, },
3871 /* Sandisk SD7/8/9s lock up hard on large trims */
3872 { "SanDisk SD[789]*", NULL
, ATA_HORKAGE_MAX_TRIM_128M
, },
3874 /* devices which puke on READ_NATIVE_MAX */
3875 { "HDS724040KLSA80", "KFAOA20N", ATA_HORKAGE_BROKEN_HPA
, },
3876 { "WDC WD3200JD-00KLB0", "WD-WCAMR1130137", ATA_HORKAGE_BROKEN_HPA
},
3877 { "WDC WD2500JD-00HBB0", "WD-WMAL71490727", ATA_HORKAGE_BROKEN_HPA
},
3878 { "MAXTOR 6L080L4", "A93.0500", ATA_HORKAGE_BROKEN_HPA
},
3880 /* this one allows HPA unlocking but fails IOs on the area */
3881 { "OCZ-VERTEX", "1.30", ATA_HORKAGE_BROKEN_HPA
},
3883 /* Devices which report 1 sector over size HPA */
3884 { "ST340823A", NULL
, ATA_HORKAGE_HPA_SIZE
, },
3885 { "ST320413A", NULL
, ATA_HORKAGE_HPA_SIZE
, },
3886 { "ST310211A", NULL
, ATA_HORKAGE_HPA_SIZE
, },
3888 /* Devices which get the IVB wrong */
3889 { "QUANTUM FIREBALLlct10 05", "A03.0900", ATA_HORKAGE_IVB
, },
3890 /* Maybe we should just blacklist TSSTcorp... */
3891 { "TSSTcorp CDDVDW SH-S202[HJN]", "SB0[01]", ATA_HORKAGE_IVB
, },
3893 /* Devices that do not need bridging limits applied */
3894 { "MTRON MSP-SATA*", NULL
, ATA_HORKAGE_BRIDGE_OK
, },
3895 { "BUFFALO HD-QSU2/R5", NULL
, ATA_HORKAGE_BRIDGE_OK
, },
3897 /* Devices which aren't very happy with higher link speeds */
3898 { "WD My Book", NULL
, ATA_HORKAGE_1_5_GBPS
, },
3899 { "Seagate FreeAgent GoFlex", NULL
, ATA_HORKAGE_1_5_GBPS
, },
3902 * Devices which choke on SETXFER. Applies only if both the
3903 * device and controller are SATA.
3905 { "PIONEER DVD-RW DVRTD08", NULL
, ATA_HORKAGE_NOSETXFER
},
3906 { "PIONEER DVD-RW DVRTD08A", NULL
, ATA_HORKAGE_NOSETXFER
},
3907 { "PIONEER DVD-RW DVR-215", NULL
, ATA_HORKAGE_NOSETXFER
},
3908 { "PIONEER DVD-RW DVR-212D", NULL
, ATA_HORKAGE_NOSETXFER
},
3909 { "PIONEER DVD-RW DVR-216D", NULL
, ATA_HORKAGE_NOSETXFER
},
3911 /* Crucial BX100 SSD 500GB has broken LPM support */
3912 { "CT500BX100SSD1", NULL
, ATA_HORKAGE_NOLPM
},
3914 /* 512GB MX100 with MU01 firmware has both queued TRIM and LPM issues */
3915 { "Crucial_CT512MX100*", "MU01", ATA_HORKAGE_NO_NCQ_TRIM
|
3916 ATA_HORKAGE_ZERO_AFTER_TRIM
|
3917 ATA_HORKAGE_NOLPM
, },
3918 /* 512GB MX100 with newer firmware has only LPM issues */
3919 { "Crucial_CT512MX100*", NULL
, ATA_HORKAGE_ZERO_AFTER_TRIM
|
3920 ATA_HORKAGE_NOLPM
, },
3922 /* 480GB+ M500 SSDs have both queued TRIM and LPM issues */
3923 { "Crucial_CT480M500*", NULL
, ATA_HORKAGE_NO_NCQ_TRIM
|
3924 ATA_HORKAGE_ZERO_AFTER_TRIM
|
3925 ATA_HORKAGE_NOLPM
, },
3926 { "Crucial_CT960M500*", NULL
, ATA_HORKAGE_NO_NCQ_TRIM
|
3927 ATA_HORKAGE_ZERO_AFTER_TRIM
|
3928 ATA_HORKAGE_NOLPM
, },
3930 /* These specific Samsung models/firmware-revs do not handle LPM well */
3931 { "SAMSUNG MZMPC128HBFU-000MV", "CXM14M1Q", ATA_HORKAGE_NOLPM
, },
3932 { "SAMSUNG SSD PM830 mSATA *", "CXM13D1Q", ATA_HORKAGE_NOLPM
, },
3933 { "SAMSUNG MZ7TD256HAFV-000L9", NULL
, ATA_HORKAGE_NOLPM
, },
3934 { "SAMSUNG MZ7TE512HMHP-000L1", "EXT06L0Q", ATA_HORKAGE_NOLPM
, },
3936 /* devices that don't properly handle queued TRIM commands */
3937 { "Micron_M500IT_*", "MU01", ATA_HORKAGE_NO_NCQ_TRIM
|
3938 ATA_HORKAGE_ZERO_AFTER_TRIM
, },
3939 { "Micron_M500_*", NULL
, ATA_HORKAGE_NO_NCQ_TRIM
|
3940 ATA_HORKAGE_ZERO_AFTER_TRIM
, },
3941 { "Crucial_CT*M500*", NULL
, ATA_HORKAGE_NO_NCQ_TRIM
|
3942 ATA_HORKAGE_ZERO_AFTER_TRIM
, },
3943 { "Micron_M5[15]0_*", "MU01", ATA_HORKAGE_NO_NCQ_TRIM
|
3944 ATA_HORKAGE_ZERO_AFTER_TRIM
, },
3945 { "Crucial_CT*M550*", "MU01", ATA_HORKAGE_NO_NCQ_TRIM
|
3946 ATA_HORKAGE_ZERO_AFTER_TRIM
, },
3947 { "Crucial_CT*MX100*", "MU01", ATA_HORKAGE_NO_NCQ_TRIM
|
3948 ATA_HORKAGE_ZERO_AFTER_TRIM
, },
3949 { "Samsung SSD 840*", NULL
, ATA_HORKAGE_NO_NCQ_TRIM
|
3950 ATA_HORKAGE_ZERO_AFTER_TRIM
, },
3951 { "Samsung SSD 850*", NULL
, ATA_HORKAGE_NO_NCQ_TRIM
|
3952 ATA_HORKAGE_ZERO_AFTER_TRIM
, },
3953 { "FCCT*M500*", NULL
, ATA_HORKAGE_NO_NCQ_TRIM
|
3954 ATA_HORKAGE_ZERO_AFTER_TRIM
, },
3956 /* devices that don't properly handle TRIM commands */
3957 { "SuperSSpeed S238*", NULL
, ATA_HORKAGE_NOTRIM
, },
3960 * As defined, the DRAT (Deterministic Read After Trim) and RZAT
3961 * (Return Zero After Trim) flags in the ATA Command Set are
3962 * unreliable in the sense that they only define what happens if
3963 * the device successfully executed the DSM TRIM command. TRIM
3964 * is only advisory, however, and the device is free to silently
3965 * ignore all or parts of the request.
3967 * Whitelist drives that are known to reliably return zeroes
3972 * The intel 510 drive has buggy DRAT/RZAT. Explicitly exclude
3973 * that model before whitelisting all other intel SSDs.
3975 { "INTEL*SSDSC2MH*", NULL
, 0, },
3977 { "Micron*", NULL
, ATA_HORKAGE_ZERO_AFTER_TRIM
, },
3978 { "Crucial*", NULL
, ATA_HORKAGE_ZERO_AFTER_TRIM
, },
3979 { "INTEL*SSD*", NULL
, ATA_HORKAGE_ZERO_AFTER_TRIM
, },
3980 { "SSD*INTEL*", NULL
, ATA_HORKAGE_ZERO_AFTER_TRIM
, },
3981 { "Samsung*SSD*", NULL
, ATA_HORKAGE_ZERO_AFTER_TRIM
, },
3982 { "SAMSUNG*SSD*", NULL
, ATA_HORKAGE_ZERO_AFTER_TRIM
, },
3983 { "SAMSUNG*MZ7KM*", NULL
, ATA_HORKAGE_ZERO_AFTER_TRIM
, },
3984 { "ST[1248][0248]0[FH]*", NULL
, ATA_HORKAGE_ZERO_AFTER_TRIM
, },
3987 * Some WD SATA-I drives spin up and down erratically when the link
3988 * is put into the slumber mode. We don't have full list of the
3989 * affected devices. Disable LPM if the device matches one of the
3990 * known prefixes and is SATA-1. As a side effect LPM partial is
3993 * https://bugzilla.kernel.org/show_bug.cgi?id=57211
3995 { "WDC WD800JD-*", NULL
, ATA_HORKAGE_WD_BROKEN_LPM
},
3996 { "WDC WD1200JD-*", NULL
, ATA_HORKAGE_WD_BROKEN_LPM
},
3997 { "WDC WD1600JD-*", NULL
, ATA_HORKAGE_WD_BROKEN_LPM
},
3998 { "WDC WD2000JD-*", NULL
, ATA_HORKAGE_WD_BROKEN_LPM
},
3999 { "WDC WD2500JD-*", NULL
, ATA_HORKAGE_WD_BROKEN_LPM
},
4000 { "WDC WD3000JD-*", NULL
, ATA_HORKAGE_WD_BROKEN_LPM
},
4001 { "WDC WD3200JD-*", NULL
, ATA_HORKAGE_WD_BROKEN_LPM
},
4007 static unsigned long ata_dev_blacklisted(const struct ata_device
*dev
)
4009 unsigned char model_num
[ATA_ID_PROD_LEN
+ 1];
4010 unsigned char model_rev
[ATA_ID_FW_REV_LEN
+ 1];
4011 const struct ata_blacklist_entry
*ad
= ata_device_blacklist
;
4013 ata_id_c_string(dev
->id
, model_num
, ATA_ID_PROD
, sizeof(model_num
));
4014 ata_id_c_string(dev
->id
, model_rev
, ATA_ID_FW_REV
, sizeof(model_rev
));
4016 while (ad
->model_num
) {
4017 if (glob_match(ad
->model_num
, model_num
)) {
4018 if (ad
->model_rev
== NULL
)
4020 if (glob_match(ad
->model_rev
, model_rev
))
4028 static int ata_dma_blacklisted(const struct ata_device
*dev
)
4030 /* We don't support polling DMA.
4031 * DMA blacklist those ATAPI devices with CDB-intr (and use PIO)
4032 * if the LLDD handles only interrupts in the HSM_ST_LAST state.
4034 if ((dev
->link
->ap
->flags
& ATA_FLAG_PIO_POLLING
) &&
4035 (dev
->flags
& ATA_DFLAG_CDB_INTR
))
4037 return (dev
->horkage
& ATA_HORKAGE_NODMA
) ? 1 : 0;
4041 * ata_is_40wire - check drive side detection
4044 * Perform drive side detection decoding, allowing for device vendors
4045 * who can't follow the documentation.
4048 static int ata_is_40wire(struct ata_device
*dev
)
4050 if (dev
->horkage
& ATA_HORKAGE_IVB
)
4051 return ata_drive_40wire_relaxed(dev
->id
);
4052 return ata_drive_40wire(dev
->id
);
4056 * cable_is_40wire - 40/80/SATA decider
4057 * @ap: port to consider
4059 * This function encapsulates the policy for speed management
4060 * in one place. At the moment we don't cache the result but
4061 * there is a good case for setting ap->cbl to the result when
4062 * we are called with unknown cables (and figuring out if it
4063 * impacts hotplug at all).
4065 * Return 1 if the cable appears to be 40 wire.
4068 static int cable_is_40wire(struct ata_port
*ap
)
4070 struct ata_link
*link
;
4071 struct ata_device
*dev
;
4073 /* If the controller thinks we are 40 wire, we are. */
4074 if (ap
->cbl
== ATA_CBL_PATA40
)
4077 /* If the controller thinks we are 80 wire, we are. */
4078 if (ap
->cbl
== ATA_CBL_PATA80
|| ap
->cbl
== ATA_CBL_SATA
)
4081 /* If the system is known to be 40 wire short cable (eg
4082 * laptop), then we allow 80 wire modes even if the drive
4085 if (ap
->cbl
== ATA_CBL_PATA40_SHORT
)
4088 /* If the controller doesn't know, we scan.
4090 * Note: We look for all 40 wire detects at this point. Any
4091 * 80 wire detect is taken to be 80 wire cable because
4092 * - in many setups only the one drive (slave if present) will
4093 * give a valid detect
4094 * - if you have a non detect capable drive you don't want it
4095 * to colour the choice
4097 ata_for_each_link(link
, ap
, EDGE
) {
4098 ata_for_each_dev(dev
, link
, ENABLED
) {
4099 if (!ata_is_40wire(dev
))
4107 * ata_dev_xfermask - Compute supported xfermask of the given device
4108 * @dev: Device to compute xfermask for
4110 * Compute supported xfermask of @dev and store it in
4111 * dev->*_mask. This function is responsible for applying all
4112 * known limits including host controller limits, device
4118 static void ata_dev_xfermask(struct ata_device
*dev
)
4120 struct ata_link
*link
= dev
->link
;
4121 struct ata_port
*ap
= link
->ap
;
4122 struct ata_host
*host
= ap
->host
;
4123 unsigned long xfer_mask
;
4125 /* controller modes available */
4126 xfer_mask
= ata_pack_xfermask(ap
->pio_mask
,
4127 ap
->mwdma_mask
, ap
->udma_mask
);
4129 /* drive modes available */
4130 xfer_mask
&= ata_pack_xfermask(dev
->pio_mask
,
4131 dev
->mwdma_mask
, dev
->udma_mask
);
4132 xfer_mask
&= ata_id_xfermask(dev
->id
);
4135 * CFA Advanced TrueIDE timings are not allowed on a shared
4138 if (ata_dev_pair(dev
)) {
4139 /* No PIO5 or PIO6 */
4140 xfer_mask
&= ~(0x03 << (ATA_SHIFT_PIO
+ 5));
4141 /* No MWDMA3 or MWDMA 4 */
4142 xfer_mask
&= ~(0x03 << (ATA_SHIFT_MWDMA
+ 3));
4145 if (ata_dma_blacklisted(dev
)) {
4146 xfer_mask
&= ~(ATA_MASK_MWDMA
| ATA_MASK_UDMA
);
4148 "device is on DMA blacklist, disabling DMA\n");
4151 if ((host
->flags
& ATA_HOST_SIMPLEX
) &&
4152 host
->simplex_claimed
&& host
->simplex_claimed
!= ap
) {
4153 xfer_mask
&= ~(ATA_MASK_MWDMA
| ATA_MASK_UDMA
);
4155 "simplex DMA is claimed by other device, disabling DMA\n");
4158 if (ap
->flags
& ATA_FLAG_NO_IORDY
)
4159 xfer_mask
&= ata_pio_mask_no_iordy(dev
);
4161 if (ap
->ops
->mode_filter
)
4162 xfer_mask
= ap
->ops
->mode_filter(dev
, xfer_mask
);
4164 /* Apply cable rule here. Don't apply it early because when
4165 * we handle hot plug the cable type can itself change.
4166 * Check this last so that we know if the transfer rate was
4167 * solely limited by the cable.
4168 * Unknown or 80 wire cables reported host side are checked
4169 * drive side as well. Cases where we know a 40wire cable
4170 * is used safely for 80 are not checked here.
4172 if (xfer_mask
& (0xF8 << ATA_SHIFT_UDMA
))
4173 /* UDMA/44 or higher would be available */
4174 if (cable_is_40wire(ap
)) {
4176 "limited to UDMA/33 due to 40-wire cable\n");
4177 xfer_mask
&= ~(0xF8 << ATA_SHIFT_UDMA
);
4180 ata_unpack_xfermask(xfer_mask
, &dev
->pio_mask
,
4181 &dev
->mwdma_mask
, &dev
->udma_mask
);
4185 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
4186 * @dev: Device to which command will be sent
4188 * Issue SET FEATURES - XFER MODE command to device @dev
4192 * PCI/etc. bus probe sem.
4195 * 0 on success, AC_ERR_* mask otherwise.
4198 static unsigned int ata_dev_set_xfermode(struct ata_device
*dev
)
4200 struct ata_taskfile tf
;
4201 unsigned int err_mask
;
4203 /* set up set-features taskfile */
4204 DPRINTK("set features - xfer mode\n");
4206 /* Some controllers and ATAPI devices show flaky interrupt
4207 * behavior after setting xfer mode. Use polling instead.
4209 ata_tf_init(dev
, &tf
);
4210 tf
.command
= ATA_CMD_SET_FEATURES
;
4211 tf
.feature
= SETFEATURES_XFER
;
4212 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
| ATA_TFLAG_POLLING
;
4213 tf
.protocol
= ATA_PROT_NODATA
;
4214 /* If we are using IORDY we must send the mode setting command */
4215 if (ata_pio_need_iordy(dev
))
4216 tf
.nsect
= dev
->xfer_mode
;
4217 /* If the device has IORDY and the controller does not - turn it off */
4218 else if (ata_id_has_iordy(dev
->id
))
4220 else /* In the ancient relic department - skip all of this */
4223 /* On some disks, this command causes spin-up, so we need longer timeout */
4224 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 15000);
4226 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
4231 * ata_dev_set_feature - Issue SET FEATURES - SATA FEATURES
4232 * @dev: Device to which command will be sent
4233 * @enable: Whether to enable or disable the feature
4234 * @feature: The sector count represents the feature to set
4236 * Issue SET FEATURES - SATA FEATURES command to device @dev
4237 * on port @ap with sector count
4240 * PCI/etc. bus probe sem.
4243 * 0 on success, AC_ERR_* mask otherwise.
4245 unsigned int ata_dev_set_feature(struct ata_device
*dev
, u8 enable
, u8 feature
)
4247 struct ata_taskfile tf
;
4248 unsigned int err_mask
;
4249 unsigned long timeout
= 0;
4251 /* set up set-features taskfile */
4252 DPRINTK("set features - SATA features\n");
4254 ata_tf_init(dev
, &tf
);
4255 tf
.command
= ATA_CMD_SET_FEATURES
;
4256 tf
.feature
= enable
;
4257 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
4258 tf
.protocol
= ATA_PROT_NODATA
;
4261 if (enable
== SETFEATURES_SPINUP
)
4262 timeout
= ata_probe_timeout
?
4263 ata_probe_timeout
* 1000 : SETFEATURES_SPINUP_TIMEOUT
;
4264 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, timeout
);
4266 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
4269 EXPORT_SYMBOL_GPL(ata_dev_set_feature
);
4272 * ata_dev_init_params - Issue INIT DEV PARAMS command
4273 * @dev: Device to which command will be sent
4274 * @heads: Number of heads (taskfile parameter)
4275 * @sectors: Number of sectors (taskfile parameter)
4278 * Kernel thread context (may sleep)
4281 * 0 on success, AC_ERR_* mask otherwise.
4283 static unsigned int ata_dev_init_params(struct ata_device
*dev
,
4284 u16 heads
, u16 sectors
)
4286 struct ata_taskfile tf
;
4287 unsigned int err_mask
;
4289 /* Number of sectors per track 1-255. Number of heads 1-16 */
4290 if (sectors
< 1 || sectors
> 255 || heads
< 1 || heads
> 16)
4291 return AC_ERR_INVALID
;
4293 /* set up init dev params taskfile */
4294 DPRINTK("init dev params \n");
4296 ata_tf_init(dev
, &tf
);
4297 tf
.command
= ATA_CMD_INIT_DEV_PARAMS
;
4298 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
4299 tf
.protocol
= ATA_PROT_NODATA
;
4301 tf
.device
|= (heads
- 1) & 0x0f; /* max head = num. of heads - 1 */
4303 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
4304 /* A clean abort indicates an original or just out of spec drive
4305 and we should continue as we issue the setup based on the
4306 drive reported working geometry */
4307 if (err_mask
== AC_ERR_DEV
&& (tf
.feature
& ATA_ABORTED
))
4310 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
4315 * atapi_check_dma - Check whether ATAPI DMA can be supported
4316 * @qc: Metadata associated with taskfile to check
4318 * Allow low-level driver to filter ATA PACKET commands, returning
4319 * a status indicating whether or not it is OK to use DMA for the
4320 * supplied PACKET command.
4323 * spin_lock_irqsave(host lock)
4325 * RETURNS: 0 when ATAPI DMA can be used
4328 int atapi_check_dma(struct ata_queued_cmd
*qc
)
4330 struct ata_port
*ap
= qc
->ap
;
4332 /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a
4333 * few ATAPI devices choke on such DMA requests.
4335 if (!(qc
->dev
->horkage
& ATA_HORKAGE_ATAPI_MOD16_DMA
) &&
4336 unlikely(qc
->nbytes
& 15))
4339 if (ap
->ops
->check_atapi_dma
)
4340 return ap
->ops
->check_atapi_dma(qc
);
4346 * ata_std_qc_defer - Check whether a qc needs to be deferred
4347 * @qc: ATA command in question
4349 * Non-NCQ commands cannot run with any other command, NCQ or
4350 * not. As upper layer only knows the queue depth, we are
4351 * responsible for maintaining exclusion. This function checks
4352 * whether a new command @qc can be issued.
4355 * spin_lock_irqsave(host lock)
4358 * ATA_DEFER_* if deferring is needed, 0 otherwise.
4360 int ata_std_qc_defer(struct ata_queued_cmd
*qc
)
4362 struct ata_link
*link
= qc
->dev
->link
;
4364 if (ata_is_ncq(qc
->tf
.protocol
)) {
4365 if (!ata_tag_valid(link
->active_tag
))
4368 if (!ata_tag_valid(link
->active_tag
) && !link
->sactive
)
4372 return ATA_DEFER_LINK
;
4374 EXPORT_SYMBOL_GPL(ata_std_qc_defer
);
4376 enum ata_completion_errors
ata_noop_qc_prep(struct ata_queued_cmd
*qc
)
4380 EXPORT_SYMBOL_GPL(ata_noop_qc_prep
);
4383 * ata_sg_init - Associate command with scatter-gather table.
4384 * @qc: Command to be associated
4385 * @sg: Scatter-gather table.
4386 * @n_elem: Number of elements in s/g table.
4388 * Initialize the data-related elements of queued_cmd @qc
4389 * to point to a scatter-gather table @sg, containing @n_elem
4393 * spin_lock_irqsave(host lock)
4395 void ata_sg_init(struct ata_queued_cmd
*qc
, struct scatterlist
*sg
,
4396 unsigned int n_elem
)
4399 qc
->n_elem
= n_elem
;
4403 #ifdef CONFIG_HAS_DMA
4406 * ata_sg_clean - Unmap DMA memory associated with command
4407 * @qc: Command containing DMA memory to be released
4409 * Unmap all mapped DMA memory associated with this command.
4412 * spin_lock_irqsave(host lock)
4414 static void ata_sg_clean(struct ata_queued_cmd
*qc
)
4416 struct ata_port
*ap
= qc
->ap
;
4417 struct scatterlist
*sg
= qc
->sg
;
4418 int dir
= qc
->dma_dir
;
4420 WARN_ON_ONCE(sg
== NULL
);
4422 VPRINTK("unmapping %u sg elements\n", qc
->n_elem
);
4425 dma_unmap_sg(ap
->dev
, sg
, qc
->orig_n_elem
, dir
);
4427 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
4432 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
4433 * @qc: Command with scatter-gather table to be mapped.
4435 * DMA-map the scatter-gather table associated with queued_cmd @qc.
4438 * spin_lock_irqsave(host lock)
4441 * Zero on success, negative on error.
4444 static int ata_sg_setup(struct ata_queued_cmd
*qc
)
4446 struct ata_port
*ap
= qc
->ap
;
4447 unsigned int n_elem
;
4449 VPRINTK("ENTER, ata%u\n", ap
->print_id
);
4451 n_elem
= dma_map_sg(ap
->dev
, qc
->sg
, qc
->n_elem
, qc
->dma_dir
);
4455 VPRINTK("%d sg elements mapped\n", n_elem
);
4456 qc
->orig_n_elem
= qc
->n_elem
;
4457 qc
->n_elem
= n_elem
;
4458 qc
->flags
|= ATA_QCFLAG_DMAMAP
;
4463 #else /* !CONFIG_HAS_DMA */
4465 static inline void ata_sg_clean(struct ata_queued_cmd
*qc
) {}
4466 static inline int ata_sg_setup(struct ata_queued_cmd
*qc
) { return -1; }
4468 #endif /* !CONFIG_HAS_DMA */
4471 * swap_buf_le16 - swap halves of 16-bit words in place
4472 * @buf: Buffer to swap
4473 * @buf_words: Number of 16-bit words in buffer.
4475 * Swap halves of 16-bit words if needed to convert from
4476 * little-endian byte order to native cpu byte order, or
4480 * Inherited from caller.
4482 void swap_buf_le16(u16
*buf
, unsigned int buf_words
)
4487 for (i
= 0; i
< buf_words
; i
++)
4488 buf
[i
] = le16_to_cpu(buf
[i
]);
4489 #endif /* __BIG_ENDIAN */
4493 * ata_qc_new_init - Request an available ATA command, and initialize it
4494 * @dev: Device from whom we request an available command structure
4501 struct ata_queued_cmd
*ata_qc_new_init(struct ata_device
*dev
, int tag
)
4503 struct ata_port
*ap
= dev
->link
->ap
;
4504 struct ata_queued_cmd
*qc
;
4506 /* no command while frozen */
4507 if (unlikely(ap
->pflags
& ATA_PFLAG_FROZEN
))
4511 if (ap
->flags
& ATA_FLAG_SAS_HOST
) {
4512 tag
= ata_sas_allocate_tag(ap
);
4517 qc
= __ata_qc_from_tag(ap
, tag
);
4518 qc
->tag
= qc
->hw_tag
= tag
;
4529 * ata_qc_free - free unused ata_queued_cmd
4530 * @qc: Command to complete
4532 * Designed to free unused ata_queued_cmd object
4533 * in case something prevents using it.
4536 * spin_lock_irqsave(host lock)
4538 void ata_qc_free(struct ata_queued_cmd
*qc
)
4540 struct ata_port
*ap
;
4543 WARN_ON_ONCE(qc
== NULL
); /* ata_qc_from_tag _might_ return NULL */
4548 if (ata_tag_valid(tag
)) {
4549 qc
->tag
= ATA_TAG_POISON
;
4550 if (ap
->flags
& ATA_FLAG_SAS_HOST
)
4551 ata_sas_free_tag(tag
, ap
);
4555 void __ata_qc_complete(struct ata_queued_cmd
*qc
)
4557 struct ata_port
*ap
;
4558 struct ata_link
*link
;
4560 WARN_ON_ONCE(qc
== NULL
); /* ata_qc_from_tag _might_ return NULL */
4561 WARN_ON_ONCE(!(qc
->flags
& ATA_QCFLAG_ACTIVE
));
4563 link
= qc
->dev
->link
;
4565 if (likely(qc
->flags
& ATA_QCFLAG_DMAMAP
))
4568 /* command should be marked inactive atomically with qc completion */
4569 if (ata_is_ncq(qc
->tf
.protocol
)) {
4570 link
->sactive
&= ~(1 << qc
->hw_tag
);
4572 ap
->nr_active_links
--;
4574 link
->active_tag
= ATA_TAG_POISON
;
4575 ap
->nr_active_links
--;
4578 /* clear exclusive status */
4579 if (unlikely(qc
->flags
& ATA_QCFLAG_CLEAR_EXCL
&&
4580 ap
->excl_link
== link
))
4581 ap
->excl_link
= NULL
;
4583 /* atapi: mark qc as inactive to prevent the interrupt handler
4584 * from completing the command twice later, before the error handler
4585 * is called. (when rc != 0 and atapi request sense is needed)
4587 qc
->flags
&= ~ATA_QCFLAG_ACTIVE
;
4588 ap
->qc_active
&= ~(1ULL << qc
->tag
);
4590 /* call completion callback */
4591 qc
->complete_fn(qc
);
4594 static void fill_result_tf(struct ata_queued_cmd
*qc
)
4596 struct ata_port
*ap
= qc
->ap
;
4598 qc
->result_tf
.flags
= qc
->tf
.flags
;
4599 ap
->ops
->qc_fill_rtf(qc
);
4602 static void ata_verify_xfer(struct ata_queued_cmd
*qc
)
4604 struct ata_device
*dev
= qc
->dev
;
4606 if (!ata_is_data(qc
->tf
.protocol
))
4609 if ((dev
->mwdma_mask
|| dev
->udma_mask
) && ata_is_pio(qc
->tf
.protocol
))
4612 dev
->flags
&= ~ATA_DFLAG_DUBIOUS_XFER
;
4616 * ata_qc_complete - Complete an active ATA command
4617 * @qc: Command to complete
4619 * Indicate to the mid and upper layers that an ATA command has
4620 * completed, with either an ok or not-ok status.
4622 * Refrain from calling this function multiple times when
4623 * successfully completing multiple NCQ commands.
4624 * ata_qc_complete_multiple() should be used instead, which will
4625 * properly update IRQ expect state.
4628 * spin_lock_irqsave(host lock)
4630 void ata_qc_complete(struct ata_queued_cmd
*qc
)
4632 struct ata_port
*ap
= qc
->ap
;
4634 /* Trigger the LED (if available) */
4635 ledtrig_disk_activity(!!(qc
->tf
.flags
& ATA_TFLAG_WRITE
));
4637 /* XXX: New EH and old EH use different mechanisms to
4638 * synchronize EH with regular execution path.
4640 * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED.
4641 * Normal execution path is responsible for not accessing a
4642 * failed qc. libata core enforces the rule by returning NULL
4643 * from ata_qc_from_tag() for failed qcs.
4645 * Old EH depends on ata_qc_complete() nullifying completion
4646 * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does
4647 * not synchronize with interrupt handler. Only PIO task is
4650 if (ap
->ops
->error_handler
) {
4651 struct ata_device
*dev
= qc
->dev
;
4652 struct ata_eh_info
*ehi
= &dev
->link
->eh_info
;
4654 if (unlikely(qc
->err_mask
))
4655 qc
->flags
|= ATA_QCFLAG_FAILED
;
4658 * Finish internal commands without any further processing
4659 * and always with the result TF filled.
4661 if (unlikely(ata_tag_internal(qc
->tag
))) {
4663 trace_ata_qc_complete_internal(qc
);
4664 __ata_qc_complete(qc
);
4669 * Non-internal qc has failed. Fill the result TF and
4672 if (unlikely(qc
->flags
& ATA_QCFLAG_FAILED
)) {
4674 trace_ata_qc_complete_failed(qc
);
4675 ata_qc_schedule_eh(qc
);
4679 WARN_ON_ONCE(ap
->pflags
& ATA_PFLAG_FROZEN
);
4681 /* read result TF if requested */
4682 if (qc
->flags
& ATA_QCFLAG_RESULT_TF
)
4685 trace_ata_qc_complete_done(qc
);
4686 /* Some commands need post-processing after successful
4689 switch (qc
->tf
.command
) {
4690 case ATA_CMD_SET_FEATURES
:
4691 if (qc
->tf
.feature
!= SETFEATURES_WC_ON
&&
4692 qc
->tf
.feature
!= SETFEATURES_WC_OFF
&&
4693 qc
->tf
.feature
!= SETFEATURES_RA_ON
&&
4694 qc
->tf
.feature
!= SETFEATURES_RA_OFF
)
4697 case ATA_CMD_INIT_DEV_PARAMS
: /* CHS translation changed */
4698 case ATA_CMD_SET_MULTI
: /* multi_count changed */
4699 /* revalidate device */
4700 ehi
->dev_action
[dev
->devno
] |= ATA_EH_REVALIDATE
;
4701 ata_port_schedule_eh(ap
);
4705 dev
->flags
|= ATA_DFLAG_SLEEPING
;
4709 if (unlikely(dev
->flags
& ATA_DFLAG_DUBIOUS_XFER
))
4710 ata_verify_xfer(qc
);
4712 __ata_qc_complete(qc
);
4714 if (qc
->flags
& ATA_QCFLAG_EH_SCHEDULED
)
4717 /* read result TF if failed or requested */
4718 if (qc
->err_mask
|| qc
->flags
& ATA_QCFLAG_RESULT_TF
)
4721 __ata_qc_complete(qc
);
4724 EXPORT_SYMBOL_GPL(ata_qc_complete
);
4727 * ata_qc_get_active - get bitmask of active qcs
4728 * @ap: port in question
4731 * spin_lock_irqsave(host lock)
4734 * Bitmask of active qcs
4736 u64
ata_qc_get_active(struct ata_port
*ap
)
4738 u64 qc_active
= ap
->qc_active
;
4740 /* ATA_TAG_INTERNAL is sent to hw as tag 0 */
4741 if (qc_active
& (1ULL << ATA_TAG_INTERNAL
)) {
4742 qc_active
|= (1 << 0);
4743 qc_active
&= ~(1ULL << ATA_TAG_INTERNAL
);
4748 EXPORT_SYMBOL_GPL(ata_qc_get_active
);
4751 * ata_qc_issue - issue taskfile to device
4752 * @qc: command to issue to device
4754 * Prepare an ATA command to submission to device.
4755 * This includes mapping the data into a DMA-able
4756 * area, filling in the S/G table, and finally
4757 * writing the taskfile to hardware, starting the command.
4760 * spin_lock_irqsave(host lock)
4762 void ata_qc_issue(struct ata_queued_cmd
*qc
)
4764 struct ata_port
*ap
= qc
->ap
;
4765 struct ata_link
*link
= qc
->dev
->link
;
4766 u8 prot
= qc
->tf
.protocol
;
4768 /* Make sure only one non-NCQ command is outstanding. The
4769 * check is skipped for old EH because it reuses active qc to
4770 * request ATAPI sense.
4772 WARN_ON_ONCE(ap
->ops
->error_handler
&& ata_tag_valid(link
->active_tag
));
4774 if (ata_is_ncq(prot
)) {
4775 WARN_ON_ONCE(link
->sactive
& (1 << qc
->hw_tag
));
4778 ap
->nr_active_links
++;
4779 link
->sactive
|= 1 << qc
->hw_tag
;
4781 WARN_ON_ONCE(link
->sactive
);
4783 ap
->nr_active_links
++;
4784 link
->active_tag
= qc
->tag
;
4787 qc
->flags
|= ATA_QCFLAG_ACTIVE
;
4788 ap
->qc_active
|= 1ULL << qc
->tag
;
4791 * We guarantee to LLDs that they will have at least one
4792 * non-zero sg if the command is a data command.
4794 if (ata_is_data(prot
) && (!qc
->sg
|| !qc
->n_elem
|| !qc
->nbytes
))
4797 if (ata_is_dma(prot
) || (ata_is_pio(prot
) &&
4798 (ap
->flags
& ATA_FLAG_PIO_DMA
)))
4799 if (ata_sg_setup(qc
))
4802 /* if device is sleeping, schedule reset and abort the link */
4803 if (unlikely(qc
->dev
->flags
& ATA_DFLAG_SLEEPING
)) {
4804 link
->eh_info
.action
|= ATA_EH_RESET
;
4805 ata_ehi_push_desc(&link
->eh_info
, "waking up from sleep");
4806 ata_link_abort(link
);
4810 qc
->err_mask
|= ap
->ops
->qc_prep(qc
);
4811 if (unlikely(qc
->err_mask
))
4813 trace_ata_qc_issue(qc
);
4814 qc
->err_mask
|= ap
->ops
->qc_issue(qc
);
4815 if (unlikely(qc
->err_mask
))
4820 qc
->err_mask
|= AC_ERR_SYSTEM
;
4822 ata_qc_complete(qc
);
4826 * ata_phys_link_online - test whether the given link is online
4827 * @link: ATA link to test
4829 * Test whether @link is online. Note that this function returns
4830 * 0 if online status of @link cannot be obtained, so
4831 * ata_link_online(link) != !ata_link_offline(link).
4837 * True if the port online status is available and online.
4839 bool ata_phys_link_online(struct ata_link
*link
)
4843 if (sata_scr_read(link
, SCR_STATUS
, &sstatus
) == 0 &&
4844 ata_sstatus_online(sstatus
))
4850 * ata_phys_link_offline - test whether the given link is offline
4851 * @link: ATA link to test
4853 * Test whether @link is offline. Note that this function
4854 * returns 0 if offline status of @link cannot be obtained, so
4855 * ata_link_online(link) != !ata_link_offline(link).
4861 * True if the port offline status is available and offline.
4863 bool ata_phys_link_offline(struct ata_link
*link
)
4867 if (sata_scr_read(link
, SCR_STATUS
, &sstatus
) == 0 &&
4868 !ata_sstatus_online(sstatus
))
4874 * ata_link_online - test whether the given link is online
4875 * @link: ATA link to test
4877 * Test whether @link is online. This is identical to
4878 * ata_phys_link_online() when there's no slave link. When
4879 * there's a slave link, this function should only be called on
4880 * the master link and will return true if any of M/S links is
4887 * True if the port online status is available and online.
4889 bool ata_link_online(struct ata_link
*link
)
4891 struct ata_link
*slave
= link
->ap
->slave_link
;
4893 WARN_ON(link
== slave
); /* shouldn't be called on slave link */
4895 return ata_phys_link_online(link
) ||
4896 (slave
&& ata_phys_link_online(slave
));
4898 EXPORT_SYMBOL_GPL(ata_link_online
);
4901 * ata_link_offline - test whether the given link is offline
4902 * @link: ATA link to test
4904 * Test whether @link is offline. This is identical to
4905 * ata_phys_link_offline() when there's no slave link. When
4906 * there's a slave link, this function should only be called on
4907 * the master link and will return true if both M/S links are
4914 * True if the port offline status is available and offline.
4916 bool ata_link_offline(struct ata_link
*link
)
4918 struct ata_link
*slave
= link
->ap
->slave_link
;
4920 WARN_ON(link
== slave
); /* shouldn't be called on slave link */
4922 return ata_phys_link_offline(link
) &&
4923 (!slave
|| ata_phys_link_offline(slave
));
4925 EXPORT_SYMBOL_GPL(ata_link_offline
);
4928 static void ata_port_request_pm(struct ata_port
*ap
, pm_message_t mesg
,
4929 unsigned int action
, unsigned int ehi_flags
,
4932 struct ata_link
*link
;
4933 unsigned long flags
;
4935 /* Previous resume operation might still be in
4936 * progress. Wait for PM_PENDING to clear.
4938 if (ap
->pflags
& ATA_PFLAG_PM_PENDING
) {
4939 ata_port_wait_eh(ap
);
4940 WARN_ON(ap
->pflags
& ATA_PFLAG_PM_PENDING
);
4943 /* request PM ops to EH */
4944 spin_lock_irqsave(ap
->lock
, flags
);
4947 ap
->pflags
|= ATA_PFLAG_PM_PENDING
;
4948 ata_for_each_link(link
, ap
, HOST_FIRST
) {
4949 link
->eh_info
.action
|= action
;
4950 link
->eh_info
.flags
|= ehi_flags
;
4953 ata_port_schedule_eh(ap
);
4955 spin_unlock_irqrestore(ap
->lock
, flags
);
4958 ata_port_wait_eh(ap
);
4959 WARN_ON(ap
->pflags
& ATA_PFLAG_PM_PENDING
);
4964 * On some hardware, device fails to respond after spun down for suspend. As
4965 * the device won't be used before being resumed, we don't need to touch the
4966 * device. Ask EH to skip the usual stuff and proceed directly to suspend.
4968 * http://thread.gmane.org/gmane.linux.ide/46764
4970 static const unsigned int ata_port_suspend_ehi
= ATA_EHI_QUIET
4971 | ATA_EHI_NO_AUTOPSY
4972 | ATA_EHI_NO_RECOVERY
;
4974 static void ata_port_suspend(struct ata_port
*ap
, pm_message_t mesg
)
4976 ata_port_request_pm(ap
, mesg
, 0, ata_port_suspend_ehi
, false);
4979 static void ata_port_suspend_async(struct ata_port
*ap
, pm_message_t mesg
)
4981 ata_port_request_pm(ap
, mesg
, 0, ata_port_suspend_ehi
, true);
4984 static int ata_port_pm_suspend(struct device
*dev
)
4986 struct ata_port
*ap
= to_ata_port(dev
);
4988 if (pm_runtime_suspended(dev
))
4991 ata_port_suspend(ap
, PMSG_SUSPEND
);
4995 static int ata_port_pm_freeze(struct device
*dev
)
4997 struct ata_port
*ap
= to_ata_port(dev
);
4999 if (pm_runtime_suspended(dev
))
5002 ata_port_suspend(ap
, PMSG_FREEZE
);
5006 static int ata_port_pm_poweroff(struct device
*dev
)
5008 ata_port_suspend(to_ata_port(dev
), PMSG_HIBERNATE
);
5012 static const unsigned int ata_port_resume_ehi
= ATA_EHI_NO_AUTOPSY
5015 static void ata_port_resume(struct ata_port
*ap
, pm_message_t mesg
)
5017 ata_port_request_pm(ap
, mesg
, ATA_EH_RESET
, ata_port_resume_ehi
, false);
5020 static void ata_port_resume_async(struct ata_port
*ap
, pm_message_t mesg
)
5022 ata_port_request_pm(ap
, mesg
, ATA_EH_RESET
, ata_port_resume_ehi
, true);
5025 static int ata_port_pm_resume(struct device
*dev
)
5027 ata_port_resume_async(to_ata_port(dev
), PMSG_RESUME
);
5028 pm_runtime_disable(dev
);
5029 pm_runtime_set_active(dev
);
5030 pm_runtime_enable(dev
);
5035 * For ODDs, the upper layer will poll for media change every few seconds,
5036 * which will make it enter and leave suspend state every few seconds. And
5037 * as each suspend will cause a hard/soft reset, the gain of runtime suspend
5038 * is very little and the ODD may malfunction after constantly being reset.
5039 * So the idle callback here will not proceed to suspend if a non-ZPODD capable
5040 * ODD is attached to the port.
5042 static int ata_port_runtime_idle(struct device
*dev
)
5044 struct ata_port
*ap
= to_ata_port(dev
);
5045 struct ata_link
*link
;
5046 struct ata_device
*adev
;
5048 ata_for_each_link(link
, ap
, HOST_FIRST
) {
5049 ata_for_each_dev(adev
, link
, ENABLED
)
5050 if (adev
->class == ATA_DEV_ATAPI
&&
5051 !zpodd_dev_enabled(adev
))
5058 static int ata_port_runtime_suspend(struct device
*dev
)
5060 ata_port_suspend(to_ata_port(dev
), PMSG_AUTO_SUSPEND
);
5064 static int ata_port_runtime_resume(struct device
*dev
)
5066 ata_port_resume(to_ata_port(dev
), PMSG_AUTO_RESUME
);
5070 static const struct dev_pm_ops ata_port_pm_ops
= {
5071 .suspend
= ata_port_pm_suspend
,
5072 .resume
= ata_port_pm_resume
,
5073 .freeze
= ata_port_pm_freeze
,
5074 .thaw
= ata_port_pm_resume
,
5075 .poweroff
= ata_port_pm_poweroff
,
5076 .restore
= ata_port_pm_resume
,
5078 .runtime_suspend
= ata_port_runtime_suspend
,
5079 .runtime_resume
= ata_port_runtime_resume
,
5080 .runtime_idle
= ata_port_runtime_idle
,
5083 /* sas ports don't participate in pm runtime management of ata_ports,
5084 * and need to resume ata devices at the domain level, not the per-port
5085 * level. sas suspend/resume is async to allow parallel port recovery
5086 * since sas has multiple ata_port instances per Scsi_Host.
5088 void ata_sas_port_suspend(struct ata_port
*ap
)
5090 ata_port_suspend_async(ap
, PMSG_SUSPEND
);
5092 EXPORT_SYMBOL_GPL(ata_sas_port_suspend
);
5094 void ata_sas_port_resume(struct ata_port
*ap
)
5096 ata_port_resume_async(ap
, PMSG_RESUME
);
5098 EXPORT_SYMBOL_GPL(ata_sas_port_resume
);
5101 * ata_host_suspend - suspend host
5102 * @host: host to suspend
5105 * Suspend @host. Actual operation is performed by port suspend.
5107 int ata_host_suspend(struct ata_host
*host
, pm_message_t mesg
)
5109 host
->dev
->power
.power_state
= mesg
;
5112 EXPORT_SYMBOL_GPL(ata_host_suspend
);
5115 * ata_host_resume - resume host
5116 * @host: host to resume
5118 * Resume @host. Actual operation is performed by port resume.
5120 void ata_host_resume(struct ata_host
*host
)
5122 host
->dev
->power
.power_state
= PMSG_ON
;
5124 EXPORT_SYMBOL_GPL(ata_host_resume
);
5127 const struct device_type ata_port_type
= {
5130 .pm
= &ata_port_pm_ops
,
5135 * ata_dev_init - Initialize an ata_device structure
5136 * @dev: Device structure to initialize
5138 * Initialize @dev in preparation for probing.
5141 * Inherited from caller.
5143 void ata_dev_init(struct ata_device
*dev
)
5145 struct ata_link
*link
= ata_dev_phys_link(dev
);
5146 struct ata_port
*ap
= link
->ap
;
5147 unsigned long flags
;
5149 /* SATA spd limit is bound to the attached device, reset together */
5150 link
->sata_spd_limit
= link
->hw_sata_spd_limit
;
5153 /* High bits of dev->flags are used to record warm plug
5154 * requests which occur asynchronously. Synchronize using
5157 spin_lock_irqsave(ap
->lock
, flags
);
5158 dev
->flags
&= ~ATA_DFLAG_INIT_MASK
;
5160 spin_unlock_irqrestore(ap
->lock
, flags
);
5162 memset((void *)dev
+ ATA_DEVICE_CLEAR_BEGIN
, 0,
5163 ATA_DEVICE_CLEAR_END
- ATA_DEVICE_CLEAR_BEGIN
);
5164 dev
->pio_mask
= UINT_MAX
;
5165 dev
->mwdma_mask
= UINT_MAX
;
5166 dev
->udma_mask
= UINT_MAX
;
5170 * ata_link_init - Initialize an ata_link structure
5171 * @ap: ATA port link is attached to
5172 * @link: Link structure to initialize
5173 * @pmp: Port multiplier port number
5178 * Kernel thread context (may sleep)
5180 void ata_link_init(struct ata_port
*ap
, struct ata_link
*link
, int pmp
)
5184 /* clear everything except for devices */
5185 memset((void *)link
+ ATA_LINK_CLEAR_BEGIN
, 0,
5186 ATA_LINK_CLEAR_END
- ATA_LINK_CLEAR_BEGIN
);
5190 link
->active_tag
= ATA_TAG_POISON
;
5191 link
->hw_sata_spd_limit
= UINT_MAX
;
5193 /* can't use iterator, ap isn't initialized yet */
5194 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
5195 struct ata_device
*dev
= &link
->device
[i
];
5198 dev
->devno
= dev
- link
->device
;
5199 #ifdef CONFIG_ATA_ACPI
5200 dev
->gtf_filter
= ata_acpi_gtf_filter
;
5207 * sata_link_init_spd - Initialize link->sata_spd_limit
5208 * @link: Link to configure sata_spd_limit for
5210 * Initialize ``link->[hw_]sata_spd_limit`` to the currently
5214 * Kernel thread context (may sleep).
5217 * 0 on success, -errno on failure.
5219 int sata_link_init_spd(struct ata_link
*link
)
5224 rc
= sata_scr_read(link
, SCR_CONTROL
, &link
->saved_scontrol
);
5228 spd
= (link
->saved_scontrol
>> 4) & 0xf;
5230 link
->hw_sata_spd_limit
&= (1 << spd
) - 1;
5232 ata_force_link_limits(link
);
5234 link
->sata_spd_limit
= link
->hw_sata_spd_limit
;
5240 * ata_port_alloc - allocate and initialize basic ATA port resources
5241 * @host: ATA host this allocated port belongs to
5243 * Allocate and initialize basic ATA port resources.
5246 * Allocate ATA port on success, NULL on failure.
5249 * Inherited from calling layer (may sleep).
5251 struct ata_port
*ata_port_alloc(struct ata_host
*host
)
5253 struct ata_port
*ap
;
5257 ap
= kzalloc(sizeof(*ap
), GFP_KERNEL
);
5261 ap
->pflags
|= ATA_PFLAG_INITIALIZING
| ATA_PFLAG_FROZEN
;
5262 ap
->lock
= &host
->lock
;
5264 ap
->local_port_no
= -1;
5266 ap
->dev
= host
->dev
;
5268 #if defined(ATA_VERBOSE_DEBUG)
5269 /* turn on all debugging levels */
5270 ap
->msg_enable
= 0x00FF;
5271 #elif defined(ATA_DEBUG)
5272 ap
->msg_enable
= ATA_MSG_DRV
| ATA_MSG_INFO
| ATA_MSG_CTL
| ATA_MSG_WARN
| ATA_MSG_ERR
;
5274 ap
->msg_enable
= ATA_MSG_DRV
| ATA_MSG_ERR
| ATA_MSG_WARN
;
5277 mutex_init(&ap
->scsi_scan_mutex
);
5278 INIT_DELAYED_WORK(&ap
->hotplug_task
, ata_scsi_hotplug
);
5279 INIT_WORK(&ap
->scsi_rescan_task
, ata_scsi_dev_rescan
);
5280 INIT_LIST_HEAD(&ap
->eh_done_q
);
5281 init_waitqueue_head(&ap
->eh_wait_q
);
5282 init_completion(&ap
->park_req_pending
);
5283 timer_setup(&ap
->fastdrain_timer
, ata_eh_fastdrain_timerfn
,
5286 ap
->cbl
= ATA_CBL_NONE
;
5288 ata_link_init(ap
, &ap
->link
, 0);
5291 ap
->stats
.unhandled_irq
= 1;
5292 ap
->stats
.idle_irq
= 1;
5294 ata_sff_port_init(ap
);
5299 static void ata_devres_release(struct device
*gendev
, void *res
)
5301 struct ata_host
*host
= dev_get_drvdata(gendev
);
5304 for (i
= 0; i
< host
->n_ports
; i
++) {
5305 struct ata_port
*ap
= host
->ports
[i
];
5311 scsi_host_put(ap
->scsi_host
);
5315 dev_set_drvdata(gendev
, NULL
);
5319 static void ata_host_release(struct kref
*kref
)
5321 struct ata_host
*host
= container_of(kref
, struct ata_host
, kref
);
5324 for (i
= 0; i
< host
->n_ports
; i
++) {
5325 struct ata_port
*ap
= host
->ports
[i
];
5327 kfree(ap
->pmp_link
);
5328 kfree(ap
->slave_link
);
5330 host
->ports
[i
] = NULL
;
5335 void ata_host_get(struct ata_host
*host
)
5337 kref_get(&host
->kref
);
5340 void ata_host_put(struct ata_host
*host
)
5342 kref_put(&host
->kref
, ata_host_release
);
5344 EXPORT_SYMBOL_GPL(ata_host_put
);
5347 * ata_host_alloc - allocate and init basic ATA host resources
5348 * @dev: generic device this host is associated with
5349 * @max_ports: maximum number of ATA ports associated with this host
5351 * Allocate and initialize basic ATA host resources. LLD calls
5352 * this function to allocate a host, initializes it fully and
5353 * attaches it using ata_host_register().
5355 * @max_ports ports are allocated and host->n_ports is
5356 * initialized to @max_ports. The caller is allowed to decrease
5357 * host->n_ports before calling ata_host_register(). The unused
5358 * ports will be automatically freed on registration.
5361 * Allocate ATA host on success, NULL on failure.
5364 * Inherited from calling layer (may sleep).
5366 struct ata_host
*ata_host_alloc(struct device
*dev
, int max_ports
)
5368 struct ata_host
*host
;
5375 /* alloc a container for our list of ATA ports (buses) */
5376 sz
= sizeof(struct ata_host
) + (max_ports
+ 1) * sizeof(void *);
5377 host
= kzalloc(sz
, GFP_KERNEL
);
5381 if (!devres_open_group(dev
, NULL
, GFP_KERNEL
))
5384 dr
= devres_alloc(ata_devres_release
, 0, GFP_KERNEL
);
5388 devres_add(dev
, dr
);
5389 dev_set_drvdata(dev
, host
);
5391 spin_lock_init(&host
->lock
);
5392 mutex_init(&host
->eh_mutex
);
5394 host
->n_ports
= max_ports
;
5395 kref_init(&host
->kref
);
5397 /* allocate ports bound to this host */
5398 for (i
= 0; i
< max_ports
; i
++) {
5399 struct ata_port
*ap
;
5401 ap
= ata_port_alloc(host
);
5406 host
->ports
[i
] = ap
;
5409 devres_remove_group(dev
, NULL
);
5413 devres_release_group(dev
, NULL
);
5418 EXPORT_SYMBOL_GPL(ata_host_alloc
);
5421 * ata_host_alloc_pinfo - alloc host and init with port_info array
5422 * @dev: generic device this host is associated with
5423 * @ppi: array of ATA port_info to initialize host with
5424 * @n_ports: number of ATA ports attached to this host
5426 * Allocate ATA host and initialize with info from @ppi. If NULL
5427 * terminated, @ppi may contain fewer entries than @n_ports. The
5428 * last entry will be used for the remaining ports.
5431 * Allocate ATA host on success, NULL on failure.
5434 * Inherited from calling layer (may sleep).
5436 struct ata_host
*ata_host_alloc_pinfo(struct device
*dev
,
5437 const struct ata_port_info
* const * ppi
,
5440 const struct ata_port_info
*pi
;
5441 struct ata_host
*host
;
5444 host
= ata_host_alloc(dev
, n_ports
);
5448 for (i
= 0, j
= 0, pi
= NULL
; i
< host
->n_ports
; i
++) {
5449 struct ata_port
*ap
= host
->ports
[i
];
5454 ap
->pio_mask
= pi
->pio_mask
;
5455 ap
->mwdma_mask
= pi
->mwdma_mask
;
5456 ap
->udma_mask
= pi
->udma_mask
;
5457 ap
->flags
|= pi
->flags
;
5458 ap
->link
.flags
|= pi
->link_flags
;
5459 ap
->ops
= pi
->port_ops
;
5461 if (!host
->ops
&& (pi
->port_ops
!= &ata_dummy_port_ops
))
5462 host
->ops
= pi
->port_ops
;
5467 EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo
);
5469 static void ata_host_stop(struct device
*gendev
, void *res
)
5471 struct ata_host
*host
= dev_get_drvdata(gendev
);
5474 WARN_ON(!(host
->flags
& ATA_HOST_STARTED
));
5476 for (i
= 0; i
< host
->n_ports
; i
++) {
5477 struct ata_port
*ap
= host
->ports
[i
];
5479 if (ap
->ops
->port_stop
)
5480 ap
->ops
->port_stop(ap
);
5483 if (host
->ops
->host_stop
)
5484 host
->ops
->host_stop(host
);
5488 * ata_finalize_port_ops - finalize ata_port_operations
5489 * @ops: ata_port_operations to finalize
5491 * An ata_port_operations can inherit from another ops and that
5492 * ops can again inherit from another. This can go on as many
5493 * times as necessary as long as there is no loop in the
5494 * inheritance chain.
5496 * Ops tables are finalized when the host is started. NULL or
5497 * unspecified entries are inherited from the closet ancestor
5498 * which has the method and the entry is populated with it.
5499 * After finalization, the ops table directly points to all the
5500 * methods and ->inherits is no longer necessary and cleared.
5502 * Using ATA_OP_NULL, inheriting ops can force a method to NULL.
5507 static void ata_finalize_port_ops(struct ata_port_operations
*ops
)
5509 static DEFINE_SPINLOCK(lock
);
5510 const struct ata_port_operations
*cur
;
5511 void **begin
= (void **)ops
;
5512 void **end
= (void **)&ops
->inherits
;
5515 if (!ops
|| !ops
->inherits
)
5520 for (cur
= ops
->inherits
; cur
; cur
= cur
->inherits
) {
5521 void **inherit
= (void **)cur
;
5523 for (pp
= begin
; pp
< end
; pp
++, inherit
++)
5528 for (pp
= begin
; pp
< end
; pp
++)
5532 ops
->inherits
= NULL
;
5538 * ata_host_start - start and freeze ports of an ATA host
5539 * @host: ATA host to start ports for
5541 * Start and then freeze ports of @host. Started status is
5542 * recorded in host->flags, so this function can be called
5543 * multiple times. Ports are guaranteed to get started only
5544 * once. If host->ops isn't initialized yet, its set to the
5545 * first non-dummy port ops.
5548 * Inherited from calling layer (may sleep).
5551 * 0 if all ports are started successfully, -errno otherwise.
5553 int ata_host_start(struct ata_host
*host
)
5556 void *start_dr
= NULL
;
5559 if (host
->flags
& ATA_HOST_STARTED
)
5562 ata_finalize_port_ops(host
->ops
);
5564 for (i
= 0; i
< host
->n_ports
; i
++) {
5565 struct ata_port
*ap
= host
->ports
[i
];
5567 ata_finalize_port_ops(ap
->ops
);
5569 if (!host
->ops
&& !ata_port_is_dummy(ap
))
5570 host
->ops
= ap
->ops
;
5572 if (ap
->ops
->port_stop
)
5576 if (host
->ops
->host_stop
)
5580 start_dr
= devres_alloc(ata_host_stop
, 0, GFP_KERNEL
);
5585 for (i
= 0; i
< host
->n_ports
; i
++) {
5586 struct ata_port
*ap
= host
->ports
[i
];
5588 if (ap
->ops
->port_start
) {
5589 rc
= ap
->ops
->port_start(ap
);
5593 "failed to start port %d (errno=%d)\n",
5598 ata_eh_freeze_port(ap
);
5602 devres_add(host
->dev
, start_dr
);
5603 host
->flags
|= ATA_HOST_STARTED
;
5608 struct ata_port
*ap
= host
->ports
[i
];
5610 if (ap
->ops
->port_stop
)
5611 ap
->ops
->port_stop(ap
);
5613 devres_free(start_dr
);
5616 EXPORT_SYMBOL_GPL(ata_host_start
);
5619 * ata_host_init - Initialize a host struct for sas (ipr, libsas)
5620 * @host: host to initialize
5621 * @dev: device host is attached to
5625 void ata_host_init(struct ata_host
*host
, struct device
*dev
,
5626 struct ata_port_operations
*ops
)
5628 spin_lock_init(&host
->lock
);
5629 mutex_init(&host
->eh_mutex
);
5630 host
->n_tags
= ATA_MAX_QUEUE
;
5633 kref_init(&host
->kref
);
5635 EXPORT_SYMBOL_GPL(ata_host_init
);
5637 void __ata_port_probe(struct ata_port
*ap
)
5639 struct ata_eh_info
*ehi
= &ap
->link
.eh_info
;
5640 unsigned long flags
;
5642 /* kick EH for boot probing */
5643 spin_lock_irqsave(ap
->lock
, flags
);
5645 ehi
->probe_mask
|= ATA_ALL_DEVICES
;
5646 ehi
->action
|= ATA_EH_RESET
;
5647 ehi
->flags
|= ATA_EHI_NO_AUTOPSY
| ATA_EHI_QUIET
;
5649 ap
->pflags
&= ~ATA_PFLAG_INITIALIZING
;
5650 ap
->pflags
|= ATA_PFLAG_LOADING
;
5651 ata_port_schedule_eh(ap
);
5653 spin_unlock_irqrestore(ap
->lock
, flags
);
5656 int ata_port_probe(struct ata_port
*ap
)
5660 if (ap
->ops
->error_handler
) {
5661 __ata_port_probe(ap
);
5662 ata_port_wait_eh(ap
);
5664 DPRINTK("ata%u: bus probe begin\n", ap
->print_id
);
5665 rc
= ata_bus_probe(ap
);
5666 DPRINTK("ata%u: bus probe end\n", ap
->print_id
);
5672 static void async_port_probe(void *data
, async_cookie_t cookie
)
5674 struct ata_port
*ap
= data
;
5677 * If we're not allowed to scan this host in parallel,
5678 * we need to wait until all previous scans have completed
5679 * before going further.
5680 * Jeff Garzik says this is only within a controller, so we
5681 * don't need to wait for port 0, only for later ports.
5683 if (!(ap
->host
->flags
& ATA_HOST_PARALLEL_SCAN
) && ap
->port_no
!= 0)
5684 async_synchronize_cookie(cookie
);
5686 (void)ata_port_probe(ap
);
5688 /* in order to keep device order, we need to synchronize at this point */
5689 async_synchronize_cookie(cookie
);
5691 ata_scsi_scan_host(ap
, 1);
5695 * ata_host_register - register initialized ATA host
5696 * @host: ATA host to register
5697 * @sht: template for SCSI host
5699 * Register initialized ATA host. @host is allocated using
5700 * ata_host_alloc() and fully initialized by LLD. This function
5701 * starts ports, registers @host with ATA and SCSI layers and
5702 * probe registered devices.
5705 * Inherited from calling layer (may sleep).
5708 * 0 on success, -errno otherwise.
5710 int ata_host_register(struct ata_host
*host
, struct scsi_host_template
*sht
)
5714 host
->n_tags
= clamp(sht
->can_queue
, 1, ATA_MAX_QUEUE
);
5716 /* host must have been started */
5717 if (!(host
->flags
& ATA_HOST_STARTED
)) {
5718 dev_err(host
->dev
, "BUG: trying to register unstarted host\n");
5723 /* Blow away unused ports. This happens when LLD can't
5724 * determine the exact number of ports to allocate at
5727 for (i
= host
->n_ports
; host
->ports
[i
]; i
++)
5728 kfree(host
->ports
[i
]);
5730 /* give ports names and add SCSI hosts */
5731 for (i
= 0; i
< host
->n_ports
; i
++) {
5732 host
->ports
[i
]->print_id
= atomic_inc_return(&ata_print_id
);
5733 host
->ports
[i
]->local_port_no
= i
+ 1;
5736 /* Create associated sysfs transport objects */
5737 for (i
= 0; i
< host
->n_ports
; i
++) {
5738 rc
= ata_tport_add(host
->dev
,host
->ports
[i
]);
5744 rc
= ata_scsi_add_hosts(host
, sht
);
5748 /* set cable, sata_spd_limit and report */
5749 for (i
= 0; i
< host
->n_ports
; i
++) {
5750 struct ata_port
*ap
= host
->ports
[i
];
5751 unsigned long xfer_mask
;
5753 /* set SATA cable type if still unset */
5754 if (ap
->cbl
== ATA_CBL_NONE
&& (ap
->flags
& ATA_FLAG_SATA
))
5755 ap
->cbl
= ATA_CBL_SATA
;
5757 /* init sata_spd_limit to the current value */
5758 sata_link_init_spd(&ap
->link
);
5760 sata_link_init_spd(ap
->slave_link
);
5762 /* print per-port info to dmesg */
5763 xfer_mask
= ata_pack_xfermask(ap
->pio_mask
, ap
->mwdma_mask
,
5766 if (!ata_port_is_dummy(ap
)) {
5767 ata_port_info(ap
, "%cATA max %s %s\n",
5768 (ap
->flags
& ATA_FLAG_SATA
) ? 'S' : 'P',
5769 ata_mode_string(xfer_mask
),
5770 ap
->link
.eh_info
.desc
);
5771 ata_ehi_clear_desc(&ap
->link
.eh_info
);
5773 ata_port_info(ap
, "DUMMY\n");
5776 /* perform each probe asynchronously */
5777 for (i
= 0; i
< host
->n_ports
; i
++) {
5778 struct ata_port
*ap
= host
->ports
[i
];
5779 ap
->cookie
= async_schedule(async_port_probe
, ap
);
5786 ata_tport_delete(host
->ports
[i
]);
5791 EXPORT_SYMBOL_GPL(ata_host_register
);
5794 * ata_host_activate - start host, request IRQ and register it
5795 * @host: target ATA host
5796 * @irq: IRQ to request
5797 * @irq_handler: irq_handler used when requesting IRQ
5798 * @irq_flags: irq_flags used when requesting IRQ
5799 * @sht: scsi_host_template to use when registering the host
5801 * After allocating an ATA host and initializing it, most libata
5802 * LLDs perform three steps to activate the host - start host,
5803 * request IRQ and register it. This helper takes necessary
5804 * arguments and performs the three steps in one go.
5806 * An invalid IRQ skips the IRQ registration and expects the host to
5807 * have set polling mode on the port. In this case, @irq_handler
5811 * Inherited from calling layer (may sleep).
5814 * 0 on success, -errno otherwise.
5816 int ata_host_activate(struct ata_host
*host
, int irq
,
5817 irq_handler_t irq_handler
, unsigned long irq_flags
,
5818 struct scsi_host_template
*sht
)
5823 rc
= ata_host_start(host
);
5827 /* Special case for polling mode */
5829 WARN_ON(irq_handler
);
5830 return ata_host_register(host
, sht
);
5833 irq_desc
= devm_kasprintf(host
->dev
, GFP_KERNEL
, "%s[%s]",
5834 dev_driver_string(host
->dev
),
5835 dev_name(host
->dev
));
5839 rc
= devm_request_irq(host
->dev
, irq
, irq_handler
, irq_flags
,
5844 for (i
= 0; i
< host
->n_ports
; i
++)
5845 ata_port_desc(host
->ports
[i
], "irq %d", irq
);
5847 rc
= ata_host_register(host
, sht
);
5848 /* if failed, just free the IRQ and leave ports alone */
5850 devm_free_irq(host
->dev
, irq
, host
);
5854 EXPORT_SYMBOL_GPL(ata_host_activate
);
5857 * ata_port_detach - Detach ATA port in preparation of device removal
5858 * @ap: ATA port to be detached
5860 * Detach all ATA devices and the associated SCSI devices of @ap;
5861 * then, remove the associated SCSI host. @ap is guaranteed to
5862 * be quiescent on return from this function.
5865 * Kernel thread context (may sleep).
5867 static void ata_port_detach(struct ata_port
*ap
)
5869 unsigned long flags
;
5870 struct ata_link
*link
;
5871 struct ata_device
*dev
;
5873 if (!ap
->ops
->error_handler
)
5876 /* tell EH we're leaving & flush EH */
5877 spin_lock_irqsave(ap
->lock
, flags
);
5878 ap
->pflags
|= ATA_PFLAG_UNLOADING
;
5879 ata_port_schedule_eh(ap
);
5880 spin_unlock_irqrestore(ap
->lock
, flags
);
5882 /* wait till EH commits suicide */
5883 ata_port_wait_eh(ap
);
5885 /* it better be dead now */
5886 WARN_ON(!(ap
->pflags
& ATA_PFLAG_UNLOADED
));
5888 cancel_delayed_work_sync(&ap
->hotplug_task
);
5891 /* clean up zpodd on port removal */
5892 ata_for_each_link(link
, ap
, HOST_FIRST
) {
5893 ata_for_each_dev(dev
, link
, ALL
) {
5894 if (zpodd_dev_enabled(dev
))
5900 for (i
= 0; i
< SATA_PMP_MAX_PORTS
; i
++)
5901 ata_tlink_delete(&ap
->pmp_link
[i
]);
5903 /* remove the associated SCSI host */
5904 scsi_remove_host(ap
->scsi_host
);
5905 ata_tport_delete(ap
);
5909 * ata_host_detach - Detach all ports of an ATA host
5910 * @host: Host to detach
5912 * Detach all ports of @host.
5915 * Kernel thread context (may sleep).
5917 void ata_host_detach(struct ata_host
*host
)
5921 for (i
= 0; i
< host
->n_ports
; i
++) {
5922 /* Ensure ata_port probe has completed */
5923 async_synchronize_cookie(host
->ports
[i
]->cookie
+ 1);
5924 ata_port_detach(host
->ports
[i
]);
5927 /* the host is dead now, dissociate ACPI */
5928 ata_acpi_dissociate(host
);
5930 EXPORT_SYMBOL_GPL(ata_host_detach
);
5935 * ata_pci_remove_one - PCI layer callback for device removal
5936 * @pdev: PCI device that was removed
5938 * PCI layer indicates to libata via this hook that hot-unplug or
5939 * module unload event has occurred. Detach all ports. Resource
5940 * release is handled via devres.
5943 * Inherited from PCI layer (may sleep).
5945 void ata_pci_remove_one(struct pci_dev
*pdev
)
5947 struct ata_host
*host
= pci_get_drvdata(pdev
);
5949 ata_host_detach(host
);
5951 EXPORT_SYMBOL_GPL(ata_pci_remove_one
);
5953 void ata_pci_shutdown_one(struct pci_dev
*pdev
)
5955 struct ata_host
*host
= pci_get_drvdata(pdev
);
5958 for (i
= 0; i
< host
->n_ports
; i
++) {
5959 struct ata_port
*ap
= host
->ports
[i
];
5961 ap
->pflags
|= ATA_PFLAG_FROZEN
;
5963 /* Disable port interrupts */
5964 if (ap
->ops
->freeze
)
5965 ap
->ops
->freeze(ap
);
5967 /* Stop the port DMA engines */
5968 if (ap
->ops
->port_stop
)
5969 ap
->ops
->port_stop(ap
);
5972 EXPORT_SYMBOL_GPL(ata_pci_shutdown_one
);
5974 /* move to PCI subsystem */
5975 int pci_test_config_bits(struct pci_dev
*pdev
, const struct pci_bits
*bits
)
5977 unsigned long tmp
= 0;
5979 switch (bits
->width
) {
5982 pci_read_config_byte(pdev
, bits
->reg
, &tmp8
);
5988 pci_read_config_word(pdev
, bits
->reg
, &tmp16
);
5994 pci_read_config_dword(pdev
, bits
->reg
, &tmp32
);
6005 return (tmp
== bits
->val
) ? 1 : 0;
6007 EXPORT_SYMBOL_GPL(pci_test_config_bits
);
6010 void ata_pci_device_do_suspend(struct pci_dev
*pdev
, pm_message_t mesg
)
6012 pci_save_state(pdev
);
6013 pci_disable_device(pdev
);
6015 if (mesg
.event
& PM_EVENT_SLEEP
)
6016 pci_set_power_state(pdev
, PCI_D3hot
);
6018 EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend
);
6020 int ata_pci_device_do_resume(struct pci_dev
*pdev
)
6024 pci_set_power_state(pdev
, PCI_D0
);
6025 pci_restore_state(pdev
);
6027 rc
= pcim_enable_device(pdev
);
6030 "failed to enable device after resume (%d)\n", rc
);
6034 pci_set_master(pdev
);
6037 EXPORT_SYMBOL_GPL(ata_pci_device_do_resume
);
6039 int ata_pci_device_suspend(struct pci_dev
*pdev
, pm_message_t mesg
)
6041 struct ata_host
*host
= pci_get_drvdata(pdev
);
6044 rc
= ata_host_suspend(host
, mesg
);
6048 ata_pci_device_do_suspend(pdev
, mesg
);
6052 EXPORT_SYMBOL_GPL(ata_pci_device_suspend
);
6054 int ata_pci_device_resume(struct pci_dev
*pdev
)
6056 struct ata_host
*host
= pci_get_drvdata(pdev
);
6059 rc
= ata_pci_device_do_resume(pdev
);
6061 ata_host_resume(host
);
6064 EXPORT_SYMBOL_GPL(ata_pci_device_resume
);
6065 #endif /* CONFIG_PM */
6066 #endif /* CONFIG_PCI */
6069 * ata_platform_remove_one - Platform layer callback for device removal
6070 * @pdev: Platform device that was removed
6072 * Platform layer indicates to libata via this hook that hot-unplug or
6073 * module unload event has occurred. Detach all ports. Resource
6074 * release is handled via devres.
6077 * Inherited from platform layer (may sleep).
6079 int ata_platform_remove_one(struct platform_device
*pdev
)
6081 struct ata_host
*host
= platform_get_drvdata(pdev
);
6083 ata_host_detach(host
);
6087 EXPORT_SYMBOL_GPL(ata_platform_remove_one
);
6089 #ifdef CONFIG_ATA_FORCE
6090 static int __init
ata_parse_force_one(char **cur
,
6091 struct ata_force_ent
*force_ent
,
6092 const char **reason
)
6094 static const struct ata_force_param force_tbl
[] __initconst
= {
6095 { "40c", .cbl
= ATA_CBL_PATA40
},
6096 { "80c", .cbl
= ATA_CBL_PATA80
},
6097 { "short40c", .cbl
= ATA_CBL_PATA40_SHORT
},
6098 { "unk", .cbl
= ATA_CBL_PATA_UNK
},
6099 { "ign", .cbl
= ATA_CBL_PATA_IGN
},
6100 { "sata", .cbl
= ATA_CBL_SATA
},
6101 { "1.5Gbps", .spd_limit
= 1 },
6102 { "3.0Gbps", .spd_limit
= 2 },
6103 { "noncq", .horkage_on
= ATA_HORKAGE_NONCQ
},
6104 { "ncq", .horkage_off
= ATA_HORKAGE_NONCQ
},
6105 { "noncqtrim", .horkage_on
= ATA_HORKAGE_NO_NCQ_TRIM
},
6106 { "ncqtrim", .horkage_off
= ATA_HORKAGE_NO_NCQ_TRIM
},
6107 { "dump_id", .horkage_on
= ATA_HORKAGE_DUMP_ID
},
6108 { "pio0", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 0) },
6109 { "pio1", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 1) },
6110 { "pio2", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 2) },
6111 { "pio3", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 3) },
6112 { "pio4", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 4) },
6113 { "pio5", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 5) },
6114 { "pio6", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 6) },
6115 { "mwdma0", .xfer_mask
= 1 << (ATA_SHIFT_MWDMA
+ 0) },
6116 { "mwdma1", .xfer_mask
= 1 << (ATA_SHIFT_MWDMA
+ 1) },
6117 { "mwdma2", .xfer_mask
= 1 << (ATA_SHIFT_MWDMA
+ 2) },
6118 { "mwdma3", .xfer_mask
= 1 << (ATA_SHIFT_MWDMA
+ 3) },
6119 { "mwdma4", .xfer_mask
= 1 << (ATA_SHIFT_MWDMA
+ 4) },
6120 { "udma0", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 0) },
6121 { "udma16", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 0) },
6122 { "udma/16", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 0) },
6123 { "udma1", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 1) },
6124 { "udma25", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 1) },
6125 { "udma/25", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 1) },
6126 { "udma2", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 2) },
6127 { "udma33", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 2) },
6128 { "udma/33", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 2) },
6129 { "udma3", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 3) },
6130 { "udma44", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 3) },
6131 { "udma/44", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 3) },
6132 { "udma4", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 4) },
6133 { "udma66", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 4) },
6134 { "udma/66", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 4) },
6135 { "udma5", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 5) },
6136 { "udma100", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 5) },
6137 { "udma/100", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 5) },
6138 { "udma6", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 6) },
6139 { "udma133", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 6) },
6140 { "udma/133", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 6) },
6141 { "udma7", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 7) },
6142 { "nohrst", .lflags
= ATA_LFLAG_NO_HRST
},
6143 { "nosrst", .lflags
= ATA_LFLAG_NO_SRST
},
6144 { "norst", .lflags
= ATA_LFLAG_NO_HRST
| ATA_LFLAG_NO_SRST
},
6145 { "rstonce", .lflags
= ATA_LFLAG_RST_ONCE
},
6146 { "atapi_dmadir", .horkage_on
= ATA_HORKAGE_ATAPI_DMADIR
},
6147 { "disable", .horkage_on
= ATA_HORKAGE_DISABLE
},
6149 char *start
= *cur
, *p
= *cur
;
6150 char *id
, *val
, *endp
;
6151 const struct ata_force_param
*match_fp
= NULL
;
6152 int nr_matches
= 0, i
;
6154 /* find where this param ends and update *cur */
6155 while (*p
!= '\0' && *p
!= ',')
6166 p
= strchr(start
, ':');
6168 val
= strstrip(start
);
6173 id
= strstrip(start
);
6174 val
= strstrip(p
+ 1);
6177 p
= strchr(id
, '.');
6180 force_ent
->device
= simple_strtoul(p
, &endp
, 10);
6181 if (p
== endp
|| *endp
!= '\0') {
6182 *reason
= "invalid device";
6187 force_ent
->port
= simple_strtoul(id
, &endp
, 10);
6188 if (id
== endp
|| *endp
!= '\0') {
6189 *reason
= "invalid port/link";
6194 /* parse val, allow shortcuts so that both 1.5 and 1.5Gbps work */
6195 for (i
= 0; i
< ARRAY_SIZE(force_tbl
); i
++) {
6196 const struct ata_force_param
*fp
= &force_tbl
[i
];
6198 if (strncasecmp(val
, fp
->name
, strlen(val
)))
6204 if (strcasecmp(val
, fp
->name
) == 0) {
6211 *reason
= "unknown value";
6214 if (nr_matches
> 1) {
6215 *reason
= "ambiguous value";
6219 force_ent
->param
= *match_fp
;
6224 static void __init
ata_parse_force_param(void)
6226 int idx
= 0, size
= 1;
6227 int last_port
= -1, last_device
= -1;
6228 char *p
, *cur
, *next
;
6230 /* calculate maximum number of params and allocate force_tbl */
6231 for (p
= ata_force_param_buf
; *p
; p
++)
6235 ata_force_tbl
= kcalloc(size
, sizeof(ata_force_tbl
[0]), GFP_KERNEL
);
6236 if (!ata_force_tbl
) {
6237 printk(KERN_WARNING
"ata: failed to extend force table, "
6238 "libata.force ignored\n");
6242 /* parse and populate the table */
6243 for (cur
= ata_force_param_buf
; *cur
!= '\0'; cur
= next
) {
6244 const char *reason
= "";
6245 struct ata_force_ent te
= { .port
= -1, .device
= -1 };
6248 if (ata_parse_force_one(&next
, &te
, &reason
)) {
6249 printk(KERN_WARNING
"ata: failed to parse force "
6250 "parameter \"%s\" (%s)\n",
6255 if (te
.port
== -1) {
6256 te
.port
= last_port
;
6257 te
.device
= last_device
;
6260 ata_force_tbl
[idx
++] = te
;
6262 last_port
= te
.port
;
6263 last_device
= te
.device
;
6266 ata_force_tbl_size
= idx
;
6269 static void ata_free_force_param(void)
6271 kfree(ata_force_tbl
);
6274 static inline void ata_parse_force_param(void) { }
6275 static inline void ata_free_force_param(void) { }
6278 static int __init
ata_init(void)
6282 ata_parse_force_param();
6284 rc
= ata_sff_init();
6286 ata_free_force_param();
6290 libata_transport_init();
6291 ata_scsi_transport_template
= ata_attach_transport();
6292 if (!ata_scsi_transport_template
) {
6298 printk(KERN_DEBUG
"libata version " DRV_VERSION
" loaded.\n");
6305 static void __exit
ata_exit(void)
6307 ata_release_transport(ata_scsi_transport_template
);
6308 libata_transport_exit();
6310 ata_free_force_param();
6313 subsys_initcall(ata_init
);
6314 module_exit(ata_exit
);
6316 static DEFINE_RATELIMIT_STATE(ratelimit
, HZ
/ 5, 1);
6318 int ata_ratelimit(void)
6320 return __ratelimit(&ratelimit
);
6322 EXPORT_SYMBOL_GPL(ata_ratelimit
);
6325 * ata_msleep - ATA EH owner aware msleep
6326 * @ap: ATA port to attribute the sleep to
6327 * @msecs: duration to sleep in milliseconds
6329 * Sleeps @msecs. If the current task is owner of @ap's EH, the
6330 * ownership is released before going to sleep and reacquired
6331 * after the sleep is complete. IOW, other ports sharing the
6332 * @ap->host will be allowed to own the EH while this task is
6338 void ata_msleep(struct ata_port
*ap
, unsigned int msecs
)
6340 bool owns_eh
= ap
&& ap
->host
->eh_owner
== current
;
6346 unsigned long usecs
= msecs
* USEC_PER_MSEC
;
6347 usleep_range(usecs
, usecs
+ 50);
6355 EXPORT_SYMBOL_GPL(ata_msleep
);
6358 * ata_wait_register - wait until register value changes
6359 * @ap: ATA port to wait register for, can be NULL
6360 * @reg: IO-mapped register
6361 * @mask: Mask to apply to read register value
6362 * @val: Wait condition
6363 * @interval: polling interval in milliseconds
6364 * @timeout: timeout in milliseconds
6366 * Waiting for some bits of register to change is a common
6367 * operation for ATA controllers. This function reads 32bit LE
6368 * IO-mapped register @reg and tests for the following condition.
6370 * (*@reg & mask) != val
6372 * If the condition is met, it returns; otherwise, the process is
6373 * repeated after @interval_msec until timeout.
6376 * Kernel thread context (may sleep)
6379 * The final register value.
6381 u32
ata_wait_register(struct ata_port
*ap
, void __iomem
*reg
, u32 mask
, u32 val
,
6382 unsigned long interval
, unsigned long timeout
)
6384 unsigned long deadline
;
6387 tmp
= ioread32(reg
);
6389 /* Calculate timeout _after_ the first read to make sure
6390 * preceding writes reach the controller before starting to
6391 * eat away the timeout.
6393 deadline
= ata_deadline(jiffies
, timeout
);
6395 while ((tmp
& mask
) == val
&& time_before(jiffies
, deadline
)) {
6396 ata_msleep(ap
, interval
);
6397 tmp
= ioread32(reg
);
6402 EXPORT_SYMBOL_GPL(ata_wait_register
);
6407 static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd
*qc
)
6409 return AC_ERR_SYSTEM
;
6412 static void ata_dummy_error_handler(struct ata_port
*ap
)
6417 struct ata_port_operations ata_dummy_port_ops
= {
6418 .qc_prep
= ata_noop_qc_prep
,
6419 .qc_issue
= ata_dummy_qc_issue
,
6420 .error_handler
= ata_dummy_error_handler
,
6421 .sched_eh
= ata_std_sched_eh
,
6422 .end_eh
= ata_std_end_eh
,
6424 EXPORT_SYMBOL_GPL(ata_dummy_port_ops
);
6426 const struct ata_port_info ata_dummy_port_info
= {
6427 .port_ops
= &ata_dummy_port_ops
,
6429 EXPORT_SYMBOL_GPL(ata_dummy_port_info
);
6432 * Utility print functions
6434 void ata_port_printk(const struct ata_port
*ap
, const char *level
,
6435 const char *fmt
, ...)
6437 struct va_format vaf
;
6440 va_start(args
, fmt
);
6445 printk("%sata%u: %pV", level
, ap
->print_id
, &vaf
);
6449 EXPORT_SYMBOL(ata_port_printk
);
6451 void ata_link_printk(const struct ata_link
*link
, const char *level
,
6452 const char *fmt
, ...)
6454 struct va_format vaf
;
6457 va_start(args
, fmt
);
6462 if (sata_pmp_attached(link
->ap
) || link
->ap
->slave_link
)
6463 printk("%sata%u.%02u: %pV",
6464 level
, link
->ap
->print_id
, link
->pmp
, &vaf
);
6466 printk("%sata%u: %pV",
6467 level
, link
->ap
->print_id
, &vaf
);
6471 EXPORT_SYMBOL(ata_link_printk
);
6473 void ata_dev_printk(const struct ata_device
*dev
, const char *level
,
6474 const char *fmt
, ...)
6476 struct va_format vaf
;
6479 va_start(args
, fmt
);
6484 printk("%sata%u.%02u: %pV",
6485 level
, dev
->link
->ap
->print_id
, dev
->link
->pmp
+ dev
->devno
,
6490 EXPORT_SYMBOL(ata_dev_printk
);
6492 void ata_print_version(const struct device
*dev
, const char *version
)
6494 dev_printk(KERN_DEBUG
, dev
, "version %s\n", version
);
6496 EXPORT_SYMBOL(ata_print_version
);