2 * libata-core.c - helper library for ATA
4 * Maintained by: Jeff Garzik <jgarzik@pobox.com>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
8 * Copyright 2003-2004 Red Hat, Inc. All rights reserved.
9 * Copyright 2003-2004 Jeff Garzik
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2, or (at your option)
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; see the file COPYING. If not, write to
24 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
27 * libata documentation is available via 'make {ps|pdf}docs',
28 * as Documentation/DocBook/libata.*
30 * Hardware documentation available from http://www.t13.org/ and
31 * http://www.sata-io.org/
33 * Standards documents from:
34 * http://www.t13.org (ATA standards, PCI DMA IDE spec)
35 * http://www.t10.org (SCSI MMC - for ATAPI MMC)
36 * http://www.sata-io.org (SATA)
37 * http://www.compactflash.org (CF)
38 * http://www.qic.org (QIC157 - Tape and DSC)
39 * http://www.ce-ata.org (CE-ATA: not supported)
43 #include <linux/kernel.h>
44 #include <linux/module.h>
45 #include <linux/pci.h>
46 #include <linux/init.h>
47 #include <linux/list.h>
49 #include <linux/spinlock.h>
50 #include <linux/blkdev.h>
51 #include <linux/delay.h>
52 #include <linux/timer.h>
53 #include <linux/interrupt.h>
54 #include <linux/completion.h>
55 #include <linux/suspend.h>
56 #include <linux/workqueue.h>
57 #include <linux/jiffies.h>
58 #include <linux/scatterlist.h>
60 #include <scsi/scsi.h>
61 #include <scsi/scsi_cmnd.h>
62 #include <scsi/scsi_host.h>
63 #include <linux/libata.h>
64 #include <asm/semaphore.h>
65 #include <asm/byteorder.h>
66 #include <linux/cdrom.h>
71 /* debounce timing parameters in msecs { interval, duration, timeout } */
72 const unsigned long sata_deb_timing_normal
[] = { 5, 100, 2000 };
73 const unsigned long sata_deb_timing_hotplug
[] = { 25, 500, 2000 };
74 const unsigned long sata_deb_timing_long
[] = { 100, 2000, 5000 };
76 const struct ata_port_operations ata_base_port_ops
= {
77 .irq_clear
= ata_noop_irq_clear
,
78 .prereset
= ata_sff_prereset
,
79 .hardreset
= sata_sff_hardreset
,
80 .postreset
= ata_sff_postreset
,
81 .error_handler
= ata_std_error_handler
,
84 const struct ata_port_operations sata_port_ops
= {
85 .inherits
= &ata_base_port_ops
,
87 .qc_defer
= ata_std_qc_defer
,
88 .dev_select
= ata_noop_dev_select
,
91 const struct ata_port_operations sata_pmp_port_ops
= {
92 .inherits
= &sata_port_ops
,
94 .pmp_prereset
= sata_pmp_std_prereset
,
95 .pmp_hardreset
= sata_pmp_std_hardreset
,
96 .pmp_postreset
= sata_pmp_std_postreset
,
97 .error_handler
= sata_pmp_error_handler
,
100 static unsigned int ata_dev_init_params(struct ata_device
*dev
,
101 u16 heads
, u16 sectors
);
102 static unsigned int ata_dev_set_xfermode(struct ata_device
*dev
);
103 static unsigned int ata_dev_set_feature(struct ata_device
*dev
,
104 u8 enable
, u8 feature
);
105 static void ata_dev_xfermask(struct ata_device
*dev
);
106 static unsigned long ata_dev_blacklisted(const struct ata_device
*dev
);
108 unsigned int ata_print_id
= 1;
109 static struct workqueue_struct
*ata_wq
;
111 struct workqueue_struct
*ata_aux_wq
;
113 struct ata_force_param
{
117 unsigned long xfer_mask
;
118 unsigned int horkage_on
;
119 unsigned int horkage_off
;
122 struct ata_force_ent
{
125 struct ata_force_param param
;
128 static struct ata_force_ent
*ata_force_tbl
;
129 static int ata_force_tbl_size
;
131 static char ata_force_param_buf
[PAGE_SIZE
] __initdata
;
132 /* param_buf is thrown away after initialization, disallow read */
133 module_param_string(force
, ata_force_param_buf
, sizeof(ata_force_param_buf
), 0);
134 MODULE_PARM_DESC(force
, "Force ATA configurations including cable type, link speed and transfer mode (see Documentation/kernel-parameters.txt for details)");
136 int atapi_enabled
= 1;
137 module_param(atapi_enabled
, int, 0444);
138 MODULE_PARM_DESC(atapi_enabled
, "Enable discovery of ATAPI devices (0=off, 1=on)");
140 static int atapi_dmadir
= 0;
141 module_param(atapi_dmadir
, int, 0444);
142 MODULE_PARM_DESC(atapi_dmadir
, "Enable ATAPI DMADIR bridge support (0=off, 1=on)");
144 int atapi_passthru16
= 1;
145 module_param(atapi_passthru16
, int, 0444);
146 MODULE_PARM_DESC(atapi_passthru16
, "Enable ATA_16 passthru for ATAPI devices; on by default (0=off, 1=on)");
149 module_param_named(fua
, libata_fua
, int, 0444);
150 MODULE_PARM_DESC(fua
, "FUA support (0=off, 1=on)");
152 static int ata_ignore_hpa
;
153 module_param_named(ignore_hpa
, ata_ignore_hpa
, int, 0644);
154 MODULE_PARM_DESC(ignore_hpa
, "Ignore HPA limit (0=keep BIOS limits, 1=ignore limits, using full disk)");
156 static int libata_dma_mask
= ATA_DMA_MASK_ATA
|ATA_DMA_MASK_ATAPI
|ATA_DMA_MASK_CFA
;
157 module_param_named(dma
, libata_dma_mask
, int, 0444);
158 MODULE_PARM_DESC(dma
, "DMA enable/disable (0x1==ATA, 0x2==ATAPI, 0x4==CF)");
160 static int ata_probe_timeout
= ATA_TMOUT_INTERNAL
/ HZ
;
161 module_param(ata_probe_timeout
, int, 0444);
162 MODULE_PARM_DESC(ata_probe_timeout
, "Set ATA probing timeout (seconds)");
164 int libata_noacpi
= 0;
165 module_param_named(noacpi
, libata_noacpi
, int, 0444);
166 MODULE_PARM_DESC(noacpi
, "Disables the use of ACPI in probe/suspend/resume when set");
168 int libata_allow_tpm
= 0;
169 module_param_named(allow_tpm
, libata_allow_tpm
, int, 0444);
170 MODULE_PARM_DESC(allow_tpm
, "Permit the use of TPM commands");
172 MODULE_AUTHOR("Jeff Garzik");
173 MODULE_DESCRIPTION("Library module for ATA devices");
174 MODULE_LICENSE("GPL");
175 MODULE_VERSION(DRV_VERSION
);
179 * ata_force_cbl - force cable type according to libata.force
180 * @ap: ATA port of interest
182 * Force cable type according to libata.force and whine about it.
183 * The last entry which has matching port number is used, so it
184 * can be specified as part of device force parameters. For
185 * example, both "a:40c,1.00:udma4" and "1.00:40c,udma4" have the
191 void ata_force_cbl(struct ata_port
*ap
)
195 for (i
= ata_force_tbl_size
- 1; i
>= 0; i
--) {
196 const struct ata_force_ent
*fe
= &ata_force_tbl
[i
];
198 if (fe
->port
!= -1 && fe
->port
!= ap
->print_id
)
201 if (fe
->param
.cbl
== ATA_CBL_NONE
)
204 ap
->cbl
= fe
->param
.cbl
;
205 ata_port_printk(ap
, KERN_NOTICE
,
206 "FORCE: cable set to %s\n", fe
->param
.name
);
212 * ata_force_spd_limit - force SATA spd limit according to libata.force
213 * @link: ATA link of interest
215 * Force SATA spd limit according to libata.force and whine about
216 * it. When only the port part is specified (e.g. 1:), the limit
217 * applies to all links connected to both the host link and all
218 * fan-out ports connected via PMP. If the device part is
219 * specified as 0 (e.g. 1.00:), it specifies the first fan-out
220 * link not the host link. Device number 15 always points to the
221 * host link whether PMP is attached or not.
226 static void ata_force_spd_limit(struct ata_link
*link
)
230 if (ata_is_host_link(link
))
235 for (i
= ata_force_tbl_size
- 1; i
>= 0; i
--) {
236 const struct ata_force_ent
*fe
= &ata_force_tbl
[i
];
238 if (fe
->port
!= -1 && fe
->port
!= link
->ap
->print_id
)
241 if (fe
->device
!= -1 && fe
->device
!= linkno
)
244 if (!fe
->param
.spd_limit
)
247 link
->hw_sata_spd_limit
= (1 << fe
->param
.spd_limit
) - 1;
248 ata_link_printk(link
, KERN_NOTICE
,
249 "FORCE: PHY spd limit set to %s\n", fe
->param
.name
);
255 * ata_force_xfermask - force xfermask according to libata.force
256 * @dev: ATA device of interest
258 * Force xfer_mask according to libata.force and whine about it.
259 * For consistency with link selection, device number 15 selects
260 * the first device connected to the host link.
265 static void ata_force_xfermask(struct ata_device
*dev
)
267 int devno
= dev
->link
->pmp
+ dev
->devno
;
268 int alt_devno
= devno
;
271 /* allow n.15 for the first device attached to host port */
272 if (ata_is_host_link(dev
->link
) && devno
== 0)
275 for (i
= ata_force_tbl_size
- 1; i
>= 0; i
--) {
276 const struct ata_force_ent
*fe
= &ata_force_tbl
[i
];
277 unsigned long pio_mask
, mwdma_mask
, udma_mask
;
279 if (fe
->port
!= -1 && fe
->port
!= dev
->link
->ap
->print_id
)
282 if (fe
->device
!= -1 && fe
->device
!= devno
&&
283 fe
->device
!= alt_devno
)
286 if (!fe
->param
.xfer_mask
)
289 ata_unpack_xfermask(fe
->param
.xfer_mask
,
290 &pio_mask
, &mwdma_mask
, &udma_mask
);
292 dev
->udma_mask
= udma_mask
;
293 else if (mwdma_mask
) {
295 dev
->mwdma_mask
= mwdma_mask
;
299 dev
->pio_mask
= pio_mask
;
302 ata_dev_printk(dev
, KERN_NOTICE
,
303 "FORCE: xfer_mask set to %s\n", fe
->param
.name
);
309 * ata_force_horkage - force horkage according to libata.force
310 * @dev: ATA device of interest
312 * Force horkage according to libata.force and whine about it.
313 * For consistency with link selection, device number 15 selects
314 * the first device connected to the host link.
319 static void ata_force_horkage(struct ata_device
*dev
)
321 int devno
= dev
->link
->pmp
+ dev
->devno
;
322 int alt_devno
= devno
;
325 /* allow n.15 for the first device attached to host port */
326 if (ata_is_host_link(dev
->link
) && devno
== 0)
329 for (i
= 0; i
< ata_force_tbl_size
; i
++) {
330 const struct ata_force_ent
*fe
= &ata_force_tbl
[i
];
332 if (fe
->port
!= -1 && fe
->port
!= dev
->link
->ap
->print_id
)
335 if (fe
->device
!= -1 && fe
->device
!= devno
&&
336 fe
->device
!= alt_devno
)
339 if (!(~dev
->horkage
& fe
->param
.horkage_on
) &&
340 !(dev
->horkage
& fe
->param
.horkage_off
))
343 dev
->horkage
|= fe
->param
.horkage_on
;
344 dev
->horkage
&= ~fe
->param
.horkage_off
;
346 ata_dev_printk(dev
, KERN_NOTICE
,
347 "FORCE: horkage modified (%s)\n", fe
->param
.name
);
352 * atapi_cmd_type - Determine ATAPI command type from SCSI opcode
353 * @opcode: SCSI opcode
355 * Determine ATAPI command type from @opcode.
361 * ATAPI_{READ|WRITE|READ_CD|PASS_THRU|MISC}
363 int atapi_cmd_type(u8 opcode
)
372 case GPCMD_WRITE_AND_VERIFY_10
:
376 case GPCMD_READ_CD_MSF
:
377 return ATAPI_READ_CD
;
381 if (atapi_passthru16
)
382 return ATAPI_PASS_THRU
;
390 * ata_noop_irq_clear - Noop placeholder for irq_clear
391 * @ap: Port associated with this ATA transaction.
393 void ata_noop_irq_clear(struct ata_port
*ap
)
398 * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure
399 * @tf: Taskfile to convert
400 * @pmp: Port multiplier port
401 * @is_cmd: This FIS is for command
402 * @fis: Buffer into which data will output
404 * Converts a standard ATA taskfile to a Serial ATA
405 * FIS structure (Register - Host to Device).
408 * Inherited from caller.
410 void ata_tf_to_fis(const struct ata_taskfile
*tf
, u8 pmp
, int is_cmd
, u8
*fis
)
412 fis
[0] = 0x27; /* Register - Host to Device FIS */
413 fis
[1] = pmp
& 0xf; /* Port multiplier number*/
415 fis
[1] |= (1 << 7); /* bit 7 indicates Command FIS */
417 fis
[2] = tf
->command
;
418 fis
[3] = tf
->feature
;
425 fis
[8] = tf
->hob_lbal
;
426 fis
[9] = tf
->hob_lbam
;
427 fis
[10] = tf
->hob_lbah
;
428 fis
[11] = tf
->hob_feature
;
431 fis
[13] = tf
->hob_nsect
;
442 * ata_tf_from_fis - Convert SATA FIS to ATA taskfile
443 * @fis: Buffer from which data will be input
444 * @tf: Taskfile to output
446 * Converts a serial ATA FIS structure to a standard ATA taskfile.
449 * Inherited from caller.
452 void ata_tf_from_fis(const u8
*fis
, struct ata_taskfile
*tf
)
454 tf
->command
= fis
[2]; /* status */
455 tf
->feature
= fis
[3]; /* error */
462 tf
->hob_lbal
= fis
[8];
463 tf
->hob_lbam
= fis
[9];
464 tf
->hob_lbah
= fis
[10];
467 tf
->hob_nsect
= fis
[13];
470 static const u8 ata_rw_cmds
[] = {
474 ATA_CMD_READ_MULTI_EXT
,
475 ATA_CMD_WRITE_MULTI_EXT
,
479 ATA_CMD_WRITE_MULTI_FUA_EXT
,
483 ATA_CMD_PIO_READ_EXT
,
484 ATA_CMD_PIO_WRITE_EXT
,
497 ATA_CMD_WRITE_FUA_EXT
501 * ata_rwcmd_protocol - set taskfile r/w commands and protocol
502 * @tf: command to examine and configure
503 * @dev: device tf belongs to
505 * Examine the device configuration and tf->flags to calculate
506 * the proper read/write commands and protocol to use.
511 static int ata_rwcmd_protocol(struct ata_taskfile
*tf
, struct ata_device
*dev
)
515 int index
, fua
, lba48
, write
;
517 fua
= (tf
->flags
& ATA_TFLAG_FUA
) ? 4 : 0;
518 lba48
= (tf
->flags
& ATA_TFLAG_LBA48
) ? 2 : 0;
519 write
= (tf
->flags
& ATA_TFLAG_WRITE
) ? 1 : 0;
521 if (dev
->flags
& ATA_DFLAG_PIO
) {
522 tf
->protocol
= ATA_PROT_PIO
;
523 index
= dev
->multi_count
? 0 : 8;
524 } else if (lba48
&& (dev
->link
->ap
->flags
& ATA_FLAG_PIO_LBA48
)) {
525 /* Unable to use DMA due to host limitation */
526 tf
->protocol
= ATA_PROT_PIO
;
527 index
= dev
->multi_count
? 0 : 8;
529 tf
->protocol
= ATA_PROT_DMA
;
533 cmd
= ata_rw_cmds
[index
+ fua
+ lba48
+ write
];
542 * ata_tf_read_block - Read block address from ATA taskfile
543 * @tf: ATA taskfile of interest
544 * @dev: ATA device @tf belongs to
549 * Read block address from @tf. This function can handle all
550 * three address formats - LBA, LBA48 and CHS. tf->protocol and
551 * flags select the address format to use.
554 * Block address read from @tf.
556 u64
ata_tf_read_block(struct ata_taskfile
*tf
, struct ata_device
*dev
)
560 if (tf
->flags
& ATA_TFLAG_LBA
) {
561 if (tf
->flags
& ATA_TFLAG_LBA48
) {
562 block
|= (u64
)tf
->hob_lbah
<< 40;
563 block
|= (u64
)tf
->hob_lbam
<< 32;
564 block
|= tf
->hob_lbal
<< 24;
566 block
|= (tf
->device
& 0xf) << 24;
568 block
|= tf
->lbah
<< 16;
569 block
|= tf
->lbam
<< 8;
574 cyl
= tf
->lbam
| (tf
->lbah
<< 8);
575 head
= tf
->device
& 0xf;
578 block
= (cyl
* dev
->heads
+ head
) * dev
->sectors
+ sect
;
585 * ata_build_rw_tf - Build ATA taskfile for given read/write request
586 * @tf: Target ATA taskfile
587 * @dev: ATA device @tf belongs to
588 * @block: Block address
589 * @n_block: Number of blocks
590 * @tf_flags: RW/FUA etc...
596 * Build ATA taskfile @tf for read/write request described by
597 * @block, @n_block, @tf_flags and @tag on @dev.
601 * 0 on success, -ERANGE if the request is too large for @dev,
602 * -EINVAL if the request is invalid.
604 int ata_build_rw_tf(struct ata_taskfile
*tf
, struct ata_device
*dev
,
605 u64 block
, u32 n_block
, unsigned int tf_flags
,
608 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
609 tf
->flags
|= tf_flags
;
611 if (ata_ncq_enabled(dev
) && likely(tag
!= ATA_TAG_INTERNAL
)) {
613 if (!lba_48_ok(block
, n_block
))
616 tf
->protocol
= ATA_PROT_NCQ
;
617 tf
->flags
|= ATA_TFLAG_LBA
| ATA_TFLAG_LBA48
;
619 if (tf
->flags
& ATA_TFLAG_WRITE
)
620 tf
->command
= ATA_CMD_FPDMA_WRITE
;
622 tf
->command
= ATA_CMD_FPDMA_READ
;
624 tf
->nsect
= tag
<< 3;
625 tf
->hob_feature
= (n_block
>> 8) & 0xff;
626 tf
->feature
= n_block
& 0xff;
628 tf
->hob_lbah
= (block
>> 40) & 0xff;
629 tf
->hob_lbam
= (block
>> 32) & 0xff;
630 tf
->hob_lbal
= (block
>> 24) & 0xff;
631 tf
->lbah
= (block
>> 16) & 0xff;
632 tf
->lbam
= (block
>> 8) & 0xff;
633 tf
->lbal
= block
& 0xff;
636 if (tf
->flags
& ATA_TFLAG_FUA
)
637 tf
->device
|= 1 << 7;
638 } else if (dev
->flags
& ATA_DFLAG_LBA
) {
639 tf
->flags
|= ATA_TFLAG_LBA
;
641 if (lba_28_ok(block
, n_block
)) {
643 tf
->device
|= (block
>> 24) & 0xf;
644 } else if (lba_48_ok(block
, n_block
)) {
645 if (!(dev
->flags
& ATA_DFLAG_LBA48
))
649 tf
->flags
|= ATA_TFLAG_LBA48
;
651 tf
->hob_nsect
= (n_block
>> 8) & 0xff;
653 tf
->hob_lbah
= (block
>> 40) & 0xff;
654 tf
->hob_lbam
= (block
>> 32) & 0xff;
655 tf
->hob_lbal
= (block
>> 24) & 0xff;
657 /* request too large even for LBA48 */
660 if (unlikely(ata_rwcmd_protocol(tf
, dev
) < 0))
663 tf
->nsect
= n_block
& 0xff;
665 tf
->lbah
= (block
>> 16) & 0xff;
666 tf
->lbam
= (block
>> 8) & 0xff;
667 tf
->lbal
= block
& 0xff;
669 tf
->device
|= ATA_LBA
;
672 u32 sect
, head
, cyl
, track
;
674 /* The request -may- be too large for CHS addressing. */
675 if (!lba_28_ok(block
, n_block
))
678 if (unlikely(ata_rwcmd_protocol(tf
, dev
) < 0))
681 /* Convert LBA to CHS */
682 track
= (u32
)block
/ dev
->sectors
;
683 cyl
= track
/ dev
->heads
;
684 head
= track
% dev
->heads
;
685 sect
= (u32
)block
% dev
->sectors
+ 1;
687 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
688 (u32
)block
, track
, cyl
, head
, sect
);
690 /* Check whether the converted CHS can fit.
694 if ((cyl
>> 16) || (head
>> 4) || (sect
>> 8) || (!sect
))
697 tf
->nsect
= n_block
& 0xff; /* Sector count 0 means 256 sectors */
708 * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask
709 * @pio_mask: pio_mask
710 * @mwdma_mask: mwdma_mask
711 * @udma_mask: udma_mask
713 * Pack @pio_mask, @mwdma_mask and @udma_mask into a single
714 * unsigned int xfer_mask.
722 unsigned long ata_pack_xfermask(unsigned long pio_mask
,
723 unsigned long mwdma_mask
,
724 unsigned long udma_mask
)
726 return ((pio_mask
<< ATA_SHIFT_PIO
) & ATA_MASK_PIO
) |
727 ((mwdma_mask
<< ATA_SHIFT_MWDMA
) & ATA_MASK_MWDMA
) |
728 ((udma_mask
<< ATA_SHIFT_UDMA
) & ATA_MASK_UDMA
);
732 * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks
733 * @xfer_mask: xfer_mask to unpack
734 * @pio_mask: resulting pio_mask
735 * @mwdma_mask: resulting mwdma_mask
736 * @udma_mask: resulting udma_mask
738 * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask.
739 * Any NULL distination masks will be ignored.
741 void ata_unpack_xfermask(unsigned long xfer_mask
, unsigned long *pio_mask
,
742 unsigned long *mwdma_mask
, unsigned long *udma_mask
)
745 *pio_mask
= (xfer_mask
& ATA_MASK_PIO
) >> ATA_SHIFT_PIO
;
747 *mwdma_mask
= (xfer_mask
& ATA_MASK_MWDMA
) >> ATA_SHIFT_MWDMA
;
749 *udma_mask
= (xfer_mask
& ATA_MASK_UDMA
) >> ATA_SHIFT_UDMA
;
752 static const struct ata_xfer_ent
{
756 { ATA_SHIFT_PIO
, ATA_NR_PIO_MODES
, XFER_PIO_0
},
757 { ATA_SHIFT_MWDMA
, ATA_NR_MWDMA_MODES
, XFER_MW_DMA_0
},
758 { ATA_SHIFT_UDMA
, ATA_NR_UDMA_MODES
, XFER_UDMA_0
},
763 * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask
764 * @xfer_mask: xfer_mask of interest
766 * Return matching XFER_* value for @xfer_mask. Only the highest
767 * bit of @xfer_mask is considered.
773 * Matching XFER_* value, 0xff if no match found.
775 u8
ata_xfer_mask2mode(unsigned long xfer_mask
)
777 int highbit
= fls(xfer_mask
) - 1;
778 const struct ata_xfer_ent
*ent
;
780 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
781 if (highbit
>= ent
->shift
&& highbit
< ent
->shift
+ ent
->bits
)
782 return ent
->base
+ highbit
- ent
->shift
;
787 * ata_xfer_mode2mask - Find matching xfer_mask for XFER_*
788 * @xfer_mode: XFER_* of interest
790 * Return matching xfer_mask for @xfer_mode.
796 * Matching xfer_mask, 0 if no match found.
798 unsigned long ata_xfer_mode2mask(u8 xfer_mode
)
800 const struct ata_xfer_ent
*ent
;
802 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
803 if (xfer_mode
>= ent
->base
&& xfer_mode
< ent
->base
+ ent
->bits
)
804 return ((2 << (ent
->shift
+ xfer_mode
- ent
->base
)) - 1)
805 & ~((1 << ent
->shift
) - 1);
810 * ata_xfer_mode2shift - Find matching xfer_shift for XFER_*
811 * @xfer_mode: XFER_* of interest
813 * Return matching xfer_shift for @xfer_mode.
819 * Matching xfer_shift, -1 if no match found.
821 int ata_xfer_mode2shift(unsigned long xfer_mode
)
823 const struct ata_xfer_ent
*ent
;
825 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
826 if (xfer_mode
>= ent
->base
&& xfer_mode
< ent
->base
+ ent
->bits
)
832 * ata_mode_string - convert xfer_mask to string
833 * @xfer_mask: mask of bits supported; only highest bit counts.
835 * Determine string which represents the highest speed
836 * (highest bit in @modemask).
842 * Constant C string representing highest speed listed in
843 * @mode_mask, or the constant C string "<n/a>".
845 const char *ata_mode_string(unsigned long xfer_mask
)
847 static const char * const xfer_mode_str
[] = {
871 highbit
= fls(xfer_mask
) - 1;
872 if (highbit
>= 0 && highbit
< ARRAY_SIZE(xfer_mode_str
))
873 return xfer_mode_str
[highbit
];
877 static const char *sata_spd_string(unsigned int spd
)
879 static const char * const spd_str
[] = {
884 if (spd
== 0 || (spd
- 1) >= ARRAY_SIZE(spd_str
))
886 return spd_str
[spd
- 1];
889 void ata_dev_disable(struct ata_device
*dev
)
891 if (ata_dev_enabled(dev
)) {
892 if (ata_msg_drv(dev
->link
->ap
))
893 ata_dev_printk(dev
, KERN_WARNING
, "disabled\n");
894 ata_acpi_on_disable(dev
);
895 ata_down_xfermask_limit(dev
, ATA_DNXFER_FORCE_PIO0
|
901 static int ata_dev_set_dipm(struct ata_device
*dev
, enum link_pm policy
)
903 struct ata_link
*link
= dev
->link
;
904 struct ata_port
*ap
= link
->ap
;
906 unsigned int err_mask
;
910 * disallow DIPM for drivers which haven't set
911 * ATA_FLAG_IPM. This is because when DIPM is enabled,
912 * phy ready will be set in the interrupt status on
913 * state changes, which will cause some drivers to
914 * think there are errors - additionally drivers will
915 * need to disable hot plug.
917 if (!(ap
->flags
& ATA_FLAG_IPM
) || !ata_dev_enabled(dev
)) {
918 ap
->pm_policy
= NOT_AVAILABLE
;
923 * For DIPM, we will only enable it for the
926 * Why? Because Disks are too stupid to know that
927 * If the host rejects a request to go to SLUMBER
928 * they should retry at PARTIAL, and instead it
929 * just would give up. So, for medium_power to
930 * work at all, we need to only allow HIPM.
932 rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
);
938 /* no restrictions on IPM transitions */
939 scontrol
&= ~(0x3 << 8);
940 rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
);
945 if (dev
->flags
& ATA_DFLAG_DIPM
)
946 err_mask
= ata_dev_set_feature(dev
,
947 SETFEATURES_SATA_ENABLE
, SATA_DIPM
);
950 /* allow IPM to PARTIAL */
951 scontrol
&= ~(0x1 << 8);
952 scontrol
|= (0x2 << 8);
953 rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
);
958 * we don't have to disable DIPM since IPM flags
959 * disallow transitions to SLUMBER, which effectively
960 * disable DIPM if it does not support PARTIAL
964 case MAX_PERFORMANCE
:
965 /* disable all IPM transitions */
966 scontrol
|= (0x3 << 8);
967 rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
);
972 * we don't have to disable DIPM since IPM flags
973 * disallow all transitions which effectively
974 * disable DIPM anyway.
979 /* FIXME: handle SET FEATURES failure */
986 * ata_dev_enable_pm - enable SATA interface power management
987 * @dev: device to enable power management
988 * @policy: the link power management policy
990 * Enable SATA Interface power management. This will enable
991 * Device Interface Power Management (DIPM) for min_power
992 * policy, and then call driver specific callbacks for
993 * enabling Host Initiated Power management.
996 * Returns: -EINVAL if IPM is not supported, 0 otherwise.
998 void ata_dev_enable_pm(struct ata_device
*dev
, enum link_pm policy
)
1001 struct ata_port
*ap
= dev
->link
->ap
;
1003 /* set HIPM first, then DIPM */
1004 if (ap
->ops
->enable_pm
)
1005 rc
= ap
->ops
->enable_pm(ap
, policy
);
1008 rc
= ata_dev_set_dipm(dev
, policy
);
1012 ap
->pm_policy
= MAX_PERFORMANCE
;
1014 ap
->pm_policy
= policy
;
1015 return /* rc */; /* hopefully we can use 'rc' eventually */
1020 * ata_dev_disable_pm - disable SATA interface power management
1021 * @dev: device to disable power management
1023 * Disable SATA Interface power management. This will disable
1024 * Device Interface Power Management (DIPM) without changing
1025 * policy, call driver specific callbacks for disabling Host
1026 * Initiated Power management.
1031 static void ata_dev_disable_pm(struct ata_device
*dev
)
1033 struct ata_port
*ap
= dev
->link
->ap
;
1035 ata_dev_set_dipm(dev
, MAX_PERFORMANCE
);
1036 if (ap
->ops
->disable_pm
)
1037 ap
->ops
->disable_pm(ap
);
1039 #endif /* CONFIG_PM */
1041 void ata_lpm_schedule(struct ata_port
*ap
, enum link_pm policy
)
1043 ap
->pm_policy
= policy
;
1044 ap
->link
.eh_info
.action
|= ATA_EH_LPM
;
1045 ap
->link
.eh_info
.flags
|= ATA_EHI_NO_AUTOPSY
;
1046 ata_port_schedule_eh(ap
);
1050 static void ata_lpm_enable(struct ata_host
*host
)
1052 struct ata_link
*link
;
1053 struct ata_port
*ap
;
1054 struct ata_device
*dev
;
1057 for (i
= 0; i
< host
->n_ports
; i
++) {
1058 ap
= host
->ports
[i
];
1059 ata_port_for_each_link(link
, ap
) {
1060 ata_link_for_each_dev(dev
, link
)
1061 ata_dev_disable_pm(dev
);
1066 static void ata_lpm_disable(struct ata_host
*host
)
1070 for (i
= 0; i
< host
->n_ports
; i
++) {
1071 struct ata_port
*ap
= host
->ports
[i
];
1072 ata_lpm_schedule(ap
, ap
->pm_policy
);
1075 #endif /* CONFIG_PM */
1078 * ata_dev_classify - determine device type based on ATA-spec signature
1079 * @tf: ATA taskfile register set for device to be identified
1081 * Determine from taskfile register contents whether a device is
1082 * ATA or ATAPI, as per "Signature and persistence" section
1083 * of ATA/PI spec (volume 1, sect 5.14).
1089 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, %ATA_DEV_PMP or
1090 * %ATA_DEV_UNKNOWN the event of failure.
1092 unsigned int ata_dev_classify(const struct ata_taskfile
*tf
)
1094 /* Apple's open source Darwin code hints that some devices only
1095 * put a proper signature into the LBA mid/high registers,
1096 * So, we only check those. It's sufficient for uniqueness.
1098 * ATA/ATAPI-7 (d1532v1r1: Feb. 19, 2003) specified separate
1099 * signatures for ATA and ATAPI devices attached on SerialATA,
1100 * 0x3c/0xc3 and 0x69/0x96 respectively. However, SerialATA
1101 * spec has never mentioned about using different signatures
1102 * for ATA/ATAPI devices. Then, Serial ATA II: Port
1103 * Multiplier specification began to use 0x69/0x96 to identify
1104 * port multpliers and 0x3c/0xc3 to identify SEMB device.
1105 * ATA/ATAPI-7 dropped descriptions about 0x3c/0xc3 and
1106 * 0x69/0x96 shortly and described them as reserved for
1109 * We follow the current spec and consider that 0x69/0x96
1110 * identifies a port multiplier and 0x3c/0xc3 a SEMB device.
1112 if ((tf
->lbam
== 0) && (tf
->lbah
== 0)) {
1113 DPRINTK("found ATA device by sig\n");
1117 if ((tf
->lbam
== 0x14) && (tf
->lbah
== 0xeb)) {
1118 DPRINTK("found ATAPI device by sig\n");
1119 return ATA_DEV_ATAPI
;
1122 if ((tf
->lbam
== 0x69) && (tf
->lbah
== 0x96)) {
1123 DPRINTK("found PMP device by sig\n");
1127 if ((tf
->lbam
== 0x3c) && (tf
->lbah
== 0xc3)) {
1128 printk(KERN_INFO
"ata: SEMB device ignored\n");
1129 return ATA_DEV_SEMB_UNSUP
; /* not yet */
1132 DPRINTK("unknown device\n");
1133 return ATA_DEV_UNKNOWN
;
1137 * ata_id_string - Convert IDENTIFY DEVICE page into string
1138 * @id: IDENTIFY DEVICE results we will examine
1139 * @s: string into which data is output
1140 * @ofs: offset into identify device page
1141 * @len: length of string to return. must be an even number.
1143 * The strings in the IDENTIFY DEVICE page are broken up into
1144 * 16-bit chunks. Run through the string, and output each
1145 * 8-bit chunk linearly, regardless of platform.
1151 void ata_id_string(const u16
*id
, unsigned char *s
,
1152 unsigned int ofs
, unsigned int len
)
1171 * ata_id_c_string - Convert IDENTIFY DEVICE page into C string
1172 * @id: IDENTIFY DEVICE results we will examine
1173 * @s: string into which data is output
1174 * @ofs: offset into identify device page
1175 * @len: length of string to return. must be an odd number.
1177 * This function is identical to ata_id_string except that it
1178 * trims trailing spaces and terminates the resulting string with
1179 * null. @len must be actual maximum length (even number) + 1.
1184 void ata_id_c_string(const u16
*id
, unsigned char *s
,
1185 unsigned int ofs
, unsigned int len
)
1189 WARN_ON(!(len
& 1));
1191 ata_id_string(id
, s
, ofs
, len
- 1);
1193 p
= s
+ strnlen(s
, len
- 1);
1194 while (p
> s
&& p
[-1] == ' ')
1199 static u64
ata_id_n_sectors(const u16
*id
)
1201 if (ata_id_has_lba(id
)) {
1202 if (ata_id_has_lba48(id
))
1203 return ata_id_u64(id
, 100);
1205 return ata_id_u32(id
, 60);
1207 if (ata_id_current_chs_valid(id
))
1208 return ata_id_u32(id
, 57);
1210 return id
[1] * id
[3] * id
[6];
1214 u64
ata_tf_to_lba48(const struct ata_taskfile
*tf
)
1218 sectors
|= ((u64
)(tf
->hob_lbah
& 0xff)) << 40;
1219 sectors
|= ((u64
)(tf
->hob_lbam
& 0xff)) << 32;
1220 sectors
|= (tf
->hob_lbal
& 0xff) << 24;
1221 sectors
|= (tf
->lbah
& 0xff) << 16;
1222 sectors
|= (tf
->lbam
& 0xff) << 8;
1223 sectors
|= (tf
->lbal
& 0xff);
1228 u64
ata_tf_to_lba(const struct ata_taskfile
*tf
)
1232 sectors
|= (tf
->device
& 0x0f) << 24;
1233 sectors
|= (tf
->lbah
& 0xff) << 16;
1234 sectors
|= (tf
->lbam
& 0xff) << 8;
1235 sectors
|= (tf
->lbal
& 0xff);
1241 * ata_read_native_max_address - Read native max address
1242 * @dev: target device
1243 * @max_sectors: out parameter for the result native max address
1245 * Perform an LBA48 or LBA28 native size query upon the device in
1249 * 0 on success, -EACCES if command is aborted by the drive.
1250 * -EIO on other errors.
1252 static int ata_read_native_max_address(struct ata_device
*dev
, u64
*max_sectors
)
1254 unsigned int err_mask
;
1255 struct ata_taskfile tf
;
1256 int lba48
= ata_id_has_lba48(dev
->id
);
1258 ata_tf_init(dev
, &tf
);
1260 /* always clear all address registers */
1261 tf
.flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
1264 tf
.command
= ATA_CMD_READ_NATIVE_MAX_EXT
;
1265 tf
.flags
|= ATA_TFLAG_LBA48
;
1267 tf
.command
= ATA_CMD_READ_NATIVE_MAX
;
1269 tf
.protocol
|= ATA_PROT_NODATA
;
1270 tf
.device
|= ATA_LBA
;
1272 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
1274 ata_dev_printk(dev
, KERN_WARNING
, "failed to read native "
1275 "max address (err_mask=0x%x)\n", err_mask
);
1276 if (err_mask
== AC_ERR_DEV
&& (tf
.feature
& ATA_ABORTED
))
1282 *max_sectors
= ata_tf_to_lba48(&tf
) + 1;
1284 *max_sectors
= ata_tf_to_lba(&tf
) + 1;
1285 if (dev
->horkage
& ATA_HORKAGE_HPA_SIZE
)
1291 * ata_set_max_sectors - Set max sectors
1292 * @dev: target device
1293 * @new_sectors: new max sectors value to set for the device
1295 * Set max sectors of @dev to @new_sectors.
1298 * 0 on success, -EACCES if command is aborted or denied (due to
1299 * previous non-volatile SET_MAX) by the drive. -EIO on other
1302 static int ata_set_max_sectors(struct ata_device
*dev
, u64 new_sectors
)
1304 unsigned int err_mask
;
1305 struct ata_taskfile tf
;
1306 int lba48
= ata_id_has_lba48(dev
->id
);
1310 ata_tf_init(dev
, &tf
);
1312 tf
.flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
1315 tf
.command
= ATA_CMD_SET_MAX_EXT
;
1316 tf
.flags
|= ATA_TFLAG_LBA48
;
1318 tf
.hob_lbal
= (new_sectors
>> 24) & 0xff;
1319 tf
.hob_lbam
= (new_sectors
>> 32) & 0xff;
1320 tf
.hob_lbah
= (new_sectors
>> 40) & 0xff;
1322 tf
.command
= ATA_CMD_SET_MAX
;
1324 tf
.device
|= (new_sectors
>> 24) & 0xf;
1327 tf
.protocol
|= ATA_PROT_NODATA
;
1328 tf
.device
|= ATA_LBA
;
1330 tf
.lbal
= (new_sectors
>> 0) & 0xff;
1331 tf
.lbam
= (new_sectors
>> 8) & 0xff;
1332 tf
.lbah
= (new_sectors
>> 16) & 0xff;
1334 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
1336 ata_dev_printk(dev
, KERN_WARNING
, "failed to set "
1337 "max address (err_mask=0x%x)\n", err_mask
);
1338 if (err_mask
== AC_ERR_DEV
&&
1339 (tf
.feature
& (ATA_ABORTED
| ATA_IDNF
)))
1348 * ata_hpa_resize - Resize a device with an HPA set
1349 * @dev: Device to resize
1351 * Read the size of an LBA28 or LBA48 disk with HPA features and resize
1352 * it if required to the full size of the media. The caller must check
1353 * the drive has the HPA feature set enabled.
1356 * 0 on success, -errno on failure.
1358 static int ata_hpa_resize(struct ata_device
*dev
)
1360 struct ata_eh_context
*ehc
= &dev
->link
->eh_context
;
1361 int print_info
= ehc
->i
.flags
& ATA_EHI_PRINTINFO
;
1362 u64 sectors
= ata_id_n_sectors(dev
->id
);
1366 /* do we need to do it? */
1367 if (dev
->class != ATA_DEV_ATA
||
1368 !ata_id_has_lba(dev
->id
) || !ata_id_hpa_enabled(dev
->id
) ||
1369 (dev
->horkage
& ATA_HORKAGE_BROKEN_HPA
))
1372 /* read native max address */
1373 rc
= ata_read_native_max_address(dev
, &native_sectors
);
1375 /* If device aborted the command or HPA isn't going to
1376 * be unlocked, skip HPA resizing.
1378 if (rc
== -EACCES
|| !ata_ignore_hpa
) {
1379 ata_dev_printk(dev
, KERN_WARNING
, "HPA support seems "
1380 "broken, skipping HPA handling\n");
1381 dev
->horkage
|= ATA_HORKAGE_BROKEN_HPA
;
1383 /* we can continue if device aborted the command */
1391 /* nothing to do? */
1392 if (native_sectors
<= sectors
|| !ata_ignore_hpa
) {
1393 if (!print_info
|| native_sectors
== sectors
)
1396 if (native_sectors
> sectors
)
1397 ata_dev_printk(dev
, KERN_INFO
,
1398 "HPA detected: current %llu, native %llu\n",
1399 (unsigned long long)sectors
,
1400 (unsigned long long)native_sectors
);
1401 else if (native_sectors
< sectors
)
1402 ata_dev_printk(dev
, KERN_WARNING
,
1403 "native sectors (%llu) is smaller than "
1405 (unsigned long long)native_sectors
,
1406 (unsigned long long)sectors
);
1410 /* let's unlock HPA */
1411 rc
= ata_set_max_sectors(dev
, native_sectors
);
1412 if (rc
== -EACCES
) {
1413 /* if device aborted the command, skip HPA resizing */
1414 ata_dev_printk(dev
, KERN_WARNING
, "device aborted resize "
1415 "(%llu -> %llu), skipping HPA handling\n",
1416 (unsigned long long)sectors
,
1417 (unsigned long long)native_sectors
);
1418 dev
->horkage
|= ATA_HORKAGE_BROKEN_HPA
;
1423 /* re-read IDENTIFY data */
1424 rc
= ata_dev_reread_id(dev
, 0);
1426 ata_dev_printk(dev
, KERN_ERR
, "failed to re-read IDENTIFY "
1427 "data after HPA resizing\n");
1432 u64 new_sectors
= ata_id_n_sectors(dev
->id
);
1433 ata_dev_printk(dev
, KERN_INFO
,
1434 "HPA unlocked: %llu -> %llu, native %llu\n",
1435 (unsigned long long)sectors
,
1436 (unsigned long long)new_sectors
,
1437 (unsigned long long)native_sectors
);
1444 * ata_noop_dev_select - Select device 0/1 on ATA bus
1445 * @ap: ATA channel to manipulate
1446 * @device: ATA device (numbered from zero) to select
1448 * This function performs no actual function.
1450 * May be used as the dev_select() entry in ata_port_operations.
1455 void ata_noop_dev_select(struct ata_port
*ap
, unsigned int device
)
1460 * ata_dump_id - IDENTIFY DEVICE info debugging output
1461 * @id: IDENTIFY DEVICE page to dump
1463 * Dump selected 16-bit words from the given IDENTIFY DEVICE
1470 static inline void ata_dump_id(const u16
*id
)
1472 DPRINTK("49==0x%04x "
1482 DPRINTK("80==0x%04x "
1492 DPRINTK("88==0x%04x "
1499 * ata_id_xfermask - Compute xfermask from the given IDENTIFY data
1500 * @id: IDENTIFY data to compute xfer mask from
1502 * Compute the xfermask for this device. This is not as trivial
1503 * as it seems if we must consider early devices correctly.
1505 * FIXME: pre IDE drive timing (do we care ?).
1513 unsigned long ata_id_xfermask(const u16
*id
)
1515 unsigned long pio_mask
, mwdma_mask
, udma_mask
;
1517 /* Usual case. Word 53 indicates word 64 is valid */
1518 if (id
[ATA_ID_FIELD_VALID
] & (1 << 1)) {
1519 pio_mask
= id
[ATA_ID_PIO_MODES
] & 0x03;
1523 /* If word 64 isn't valid then Word 51 high byte holds
1524 * the PIO timing number for the maximum. Turn it into
1527 u8 mode
= (id
[ATA_ID_OLD_PIO_MODES
] >> 8) & 0xFF;
1528 if (mode
< 5) /* Valid PIO range */
1529 pio_mask
= (2 << mode
) - 1;
1533 /* But wait.. there's more. Design your standards by
1534 * committee and you too can get a free iordy field to
1535 * process. However its the speeds not the modes that
1536 * are supported... Note drivers using the timing API
1537 * will get this right anyway
1541 mwdma_mask
= id
[ATA_ID_MWDMA_MODES
] & 0x07;
1543 if (ata_id_is_cfa(id
)) {
1545 * Process compact flash extended modes
1547 int pio
= id
[163] & 0x7;
1548 int dma
= (id
[163] >> 3) & 7;
1551 pio_mask
|= (1 << 5);
1553 pio_mask
|= (1 << 6);
1555 mwdma_mask
|= (1 << 3);
1557 mwdma_mask
|= (1 << 4);
1561 if (id
[ATA_ID_FIELD_VALID
] & (1 << 2))
1562 udma_mask
= id
[ATA_ID_UDMA_MODES
] & 0xff;
1564 return ata_pack_xfermask(pio_mask
, mwdma_mask
, udma_mask
);
1568 * ata_pio_queue_task - Queue port_task
1569 * @ap: The ata_port to queue port_task for
1570 * @fn: workqueue function to be scheduled
1571 * @data: data for @fn to use
1572 * @delay: delay time for workqueue function
1574 * Schedule @fn(@data) for execution after @delay jiffies using
1575 * port_task. There is one port_task per port and it's the
1576 * user(low level driver)'s responsibility to make sure that only
1577 * one task is active at any given time.
1579 * libata core layer takes care of synchronization between
1580 * port_task and EH. ata_pio_queue_task() may be ignored for EH
1584 * Inherited from caller.
1586 void ata_pio_queue_task(struct ata_port
*ap
, void *data
, unsigned long delay
)
1588 ap
->port_task_data
= data
;
1590 /* may fail if ata_port_flush_task() in progress */
1591 queue_delayed_work(ata_wq
, &ap
->port_task
, delay
);
1595 * ata_port_flush_task - Flush port_task
1596 * @ap: The ata_port to flush port_task for
1598 * After this function completes, port_task is guranteed not to
1599 * be running or scheduled.
1602 * Kernel thread context (may sleep)
1604 void ata_port_flush_task(struct ata_port
*ap
)
1608 cancel_rearming_delayed_work(&ap
->port_task
);
1610 if (ata_msg_ctl(ap
))
1611 ata_port_printk(ap
, KERN_DEBUG
, "%s: EXIT\n", __func__
);
1614 static void ata_qc_complete_internal(struct ata_queued_cmd
*qc
)
1616 struct completion
*waiting
= qc
->private_data
;
1622 * ata_exec_internal_sg - execute libata internal command
1623 * @dev: Device to which the command is sent
1624 * @tf: Taskfile registers for the command and the result
1625 * @cdb: CDB for packet command
1626 * @dma_dir: Data tranfer direction of the command
1627 * @sgl: sg list for the data buffer of the command
1628 * @n_elem: Number of sg entries
1629 * @timeout: Timeout in msecs (0 for default)
1631 * Executes libata internal command with timeout. @tf contains
1632 * command on entry and result on return. Timeout and error
1633 * conditions are reported via return value. No recovery action
1634 * is taken after a command times out. It's caller's duty to
1635 * clean up after timeout.
1638 * None. Should be called with kernel context, might sleep.
1641 * Zero on success, AC_ERR_* mask on failure
1643 unsigned ata_exec_internal_sg(struct ata_device
*dev
,
1644 struct ata_taskfile
*tf
, const u8
*cdb
,
1645 int dma_dir
, struct scatterlist
*sgl
,
1646 unsigned int n_elem
, unsigned long timeout
)
1648 struct ata_link
*link
= dev
->link
;
1649 struct ata_port
*ap
= link
->ap
;
1650 u8 command
= tf
->command
;
1651 struct ata_queued_cmd
*qc
;
1652 unsigned int tag
, preempted_tag
;
1653 u32 preempted_sactive
, preempted_qc_active
;
1654 int preempted_nr_active_links
;
1655 DECLARE_COMPLETION_ONSTACK(wait
);
1656 unsigned long flags
;
1657 unsigned int err_mask
;
1660 spin_lock_irqsave(ap
->lock
, flags
);
1662 /* no internal command while frozen */
1663 if (ap
->pflags
& ATA_PFLAG_FROZEN
) {
1664 spin_unlock_irqrestore(ap
->lock
, flags
);
1665 return AC_ERR_SYSTEM
;
1668 /* initialize internal qc */
1670 /* XXX: Tag 0 is used for drivers with legacy EH as some
1671 * drivers choke if any other tag is given. This breaks
1672 * ata_tag_internal() test for those drivers. Don't use new
1673 * EH stuff without converting to it.
1675 if (ap
->ops
->error_handler
)
1676 tag
= ATA_TAG_INTERNAL
;
1680 if (test_and_set_bit(tag
, &ap
->qc_allocated
))
1682 qc
= __ata_qc_from_tag(ap
, tag
);
1690 preempted_tag
= link
->active_tag
;
1691 preempted_sactive
= link
->sactive
;
1692 preempted_qc_active
= ap
->qc_active
;
1693 preempted_nr_active_links
= ap
->nr_active_links
;
1694 link
->active_tag
= ATA_TAG_POISON
;
1697 ap
->nr_active_links
= 0;
1699 /* prepare & issue qc */
1702 memcpy(qc
->cdb
, cdb
, ATAPI_CDB_LEN
);
1703 qc
->flags
|= ATA_QCFLAG_RESULT_TF
;
1704 qc
->dma_dir
= dma_dir
;
1705 if (dma_dir
!= DMA_NONE
) {
1706 unsigned int i
, buflen
= 0;
1707 struct scatterlist
*sg
;
1709 for_each_sg(sgl
, sg
, n_elem
, i
)
1710 buflen
+= sg
->length
;
1712 ata_sg_init(qc
, sgl
, n_elem
);
1713 qc
->nbytes
= buflen
;
1716 qc
->private_data
= &wait
;
1717 qc
->complete_fn
= ata_qc_complete_internal
;
1721 spin_unlock_irqrestore(ap
->lock
, flags
);
1724 timeout
= ata_probe_timeout
* 1000 / HZ
;
1726 rc
= wait_for_completion_timeout(&wait
, msecs_to_jiffies(timeout
));
1728 ata_port_flush_task(ap
);
1731 spin_lock_irqsave(ap
->lock
, flags
);
1733 /* We're racing with irq here. If we lose, the
1734 * following test prevents us from completing the qc
1735 * twice. If we win, the port is frozen and will be
1736 * cleaned up by ->post_internal_cmd().
1738 if (qc
->flags
& ATA_QCFLAG_ACTIVE
) {
1739 qc
->err_mask
|= AC_ERR_TIMEOUT
;
1741 if (ap
->ops
->error_handler
)
1742 ata_port_freeze(ap
);
1744 ata_qc_complete(qc
);
1746 if (ata_msg_warn(ap
))
1747 ata_dev_printk(dev
, KERN_WARNING
,
1748 "qc timeout (cmd 0x%x)\n", command
);
1751 spin_unlock_irqrestore(ap
->lock
, flags
);
1754 /* do post_internal_cmd */
1755 if (ap
->ops
->post_internal_cmd
)
1756 ap
->ops
->post_internal_cmd(qc
);
1758 /* perform minimal error analysis */
1759 if (qc
->flags
& ATA_QCFLAG_FAILED
) {
1760 if (qc
->result_tf
.command
& (ATA_ERR
| ATA_DF
))
1761 qc
->err_mask
|= AC_ERR_DEV
;
1764 qc
->err_mask
|= AC_ERR_OTHER
;
1766 if (qc
->err_mask
& ~AC_ERR_OTHER
)
1767 qc
->err_mask
&= ~AC_ERR_OTHER
;
1771 spin_lock_irqsave(ap
->lock
, flags
);
1773 *tf
= qc
->result_tf
;
1774 err_mask
= qc
->err_mask
;
1777 link
->active_tag
= preempted_tag
;
1778 link
->sactive
= preempted_sactive
;
1779 ap
->qc_active
= preempted_qc_active
;
1780 ap
->nr_active_links
= preempted_nr_active_links
;
1782 /* XXX - Some LLDDs (sata_mv) disable port on command failure.
1783 * Until those drivers are fixed, we detect the condition
1784 * here, fail the command with AC_ERR_SYSTEM and reenable the
1787 * Note that this doesn't change any behavior as internal
1788 * command failure results in disabling the device in the
1789 * higher layer for LLDDs without new reset/EH callbacks.
1791 * Kill the following code as soon as those drivers are fixed.
1793 if (ap
->flags
& ATA_FLAG_DISABLED
) {
1794 err_mask
|= AC_ERR_SYSTEM
;
1798 spin_unlock_irqrestore(ap
->lock
, flags
);
1804 * ata_exec_internal - execute libata internal command
1805 * @dev: Device to which the command is sent
1806 * @tf: Taskfile registers for the command and the result
1807 * @cdb: CDB for packet command
1808 * @dma_dir: Data tranfer direction of the command
1809 * @buf: Data buffer of the command
1810 * @buflen: Length of data buffer
1811 * @timeout: Timeout in msecs (0 for default)
1813 * Wrapper around ata_exec_internal_sg() which takes simple
1814 * buffer instead of sg list.
1817 * None. Should be called with kernel context, might sleep.
1820 * Zero on success, AC_ERR_* mask on failure
1822 unsigned ata_exec_internal(struct ata_device
*dev
,
1823 struct ata_taskfile
*tf
, const u8
*cdb
,
1824 int dma_dir
, void *buf
, unsigned int buflen
,
1825 unsigned long timeout
)
1827 struct scatterlist
*psg
= NULL
, sg
;
1828 unsigned int n_elem
= 0;
1830 if (dma_dir
!= DMA_NONE
) {
1832 sg_init_one(&sg
, buf
, buflen
);
1837 return ata_exec_internal_sg(dev
, tf
, cdb
, dma_dir
, psg
, n_elem
,
1842 * ata_do_simple_cmd - execute simple internal command
1843 * @dev: Device to which the command is sent
1844 * @cmd: Opcode to execute
1846 * Execute a 'simple' command, that only consists of the opcode
1847 * 'cmd' itself, without filling any other registers
1850 * Kernel thread context (may sleep).
1853 * Zero on success, AC_ERR_* mask on failure
1855 unsigned int ata_do_simple_cmd(struct ata_device
*dev
, u8 cmd
)
1857 struct ata_taskfile tf
;
1859 ata_tf_init(dev
, &tf
);
1862 tf
.flags
|= ATA_TFLAG_DEVICE
;
1863 tf
.protocol
= ATA_PROT_NODATA
;
1865 return ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
1869 * ata_pio_need_iordy - check if iordy needed
1872 * Check if the current speed of the device requires IORDY. Used
1873 * by various controllers for chip configuration.
1876 unsigned int ata_pio_need_iordy(const struct ata_device
*adev
)
1878 /* Controller doesn't support IORDY. Probably a pointless check
1879 as the caller should know this */
1880 if (adev
->link
->ap
->flags
& ATA_FLAG_NO_IORDY
)
1882 /* PIO3 and higher it is mandatory */
1883 if (adev
->pio_mode
> XFER_PIO_2
)
1885 /* We turn it on when possible */
1886 if (ata_id_has_iordy(adev
->id
))
1892 * ata_pio_mask_no_iordy - Return the non IORDY mask
1895 * Compute the highest mode possible if we are not using iordy. Return
1896 * -1 if no iordy mode is available.
1899 static u32
ata_pio_mask_no_iordy(const struct ata_device
*adev
)
1901 /* If we have no drive specific rule, then PIO 2 is non IORDY */
1902 if (adev
->id
[ATA_ID_FIELD_VALID
] & 2) { /* EIDE */
1903 u16 pio
= adev
->id
[ATA_ID_EIDE_PIO
];
1904 /* Is the speed faster than the drive allows non IORDY ? */
1906 /* This is cycle times not frequency - watch the logic! */
1907 if (pio
> 240) /* PIO2 is 240nS per cycle */
1908 return 3 << ATA_SHIFT_PIO
;
1909 return 7 << ATA_SHIFT_PIO
;
1912 return 3 << ATA_SHIFT_PIO
;
1916 * ata_dev_read_id - Read ID data from the specified device
1917 * @dev: target device
1918 * @p_class: pointer to class of the target device (may be changed)
1919 * @flags: ATA_READID_* flags
1920 * @id: buffer to read IDENTIFY data into
1922 * Read ID data from the specified device. ATA_CMD_ID_ATA is
1923 * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
1924 * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS
1925 * for pre-ATA4 drives.
1927 * FIXME: ATA_CMD_ID_ATA is optional for early drives and right
1928 * now we abort if we hit that case.
1931 * Kernel thread context (may sleep)
1934 * 0 on success, -errno otherwise.
1936 int ata_dev_read_id(struct ata_device
*dev
, unsigned int *p_class
,
1937 unsigned int flags
, u16
*id
)
1939 struct ata_port
*ap
= dev
->link
->ap
;
1940 unsigned int class = *p_class
;
1941 struct ata_taskfile tf
;
1942 unsigned int err_mask
= 0;
1944 int may_fallback
= 1, tried_spinup
= 0;
1947 if (ata_msg_ctl(ap
))
1948 ata_dev_printk(dev
, KERN_DEBUG
, "%s: ENTER\n", __func__
);
1951 ata_tf_init(dev
, &tf
);
1955 tf
.command
= ATA_CMD_ID_ATA
;
1958 tf
.command
= ATA_CMD_ID_ATAPI
;
1962 reason
= "unsupported class";
1966 tf
.protocol
= ATA_PROT_PIO
;
1968 /* Some devices choke if TF registers contain garbage. Make
1969 * sure those are properly initialized.
1971 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
1973 /* Device presence detection is unreliable on some
1974 * controllers. Always poll IDENTIFY if available.
1976 tf
.flags
|= ATA_TFLAG_POLLING
;
1978 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_FROM_DEVICE
,
1979 id
, sizeof(id
[0]) * ATA_ID_WORDS
, 0);
1981 if (err_mask
& AC_ERR_NODEV_HINT
) {
1982 ata_dev_printk(dev
, KERN_DEBUG
,
1983 "NODEV after polling detection\n");
1987 if ((err_mask
== AC_ERR_DEV
) && (tf
.feature
& ATA_ABORTED
)) {
1988 /* Device or controller might have reported
1989 * the wrong device class. Give a shot at the
1990 * other IDENTIFY if the current one is
1991 * aborted by the device.
1996 if (class == ATA_DEV_ATA
)
1997 class = ATA_DEV_ATAPI
;
1999 class = ATA_DEV_ATA
;
2003 /* Control reaches here iff the device aborted
2004 * both flavors of IDENTIFYs which happens
2005 * sometimes with phantom devices.
2007 ata_dev_printk(dev
, KERN_DEBUG
,
2008 "both IDENTIFYs aborted, assuming NODEV\n");
2013 reason
= "I/O error";
2017 /* Falling back doesn't make sense if ID data was read
2018 * successfully at least once.
2022 swap_buf_le16(id
, ATA_ID_WORDS
);
2026 reason
= "device reports invalid type";
2028 if (class == ATA_DEV_ATA
) {
2029 if (!ata_id_is_ata(id
) && !ata_id_is_cfa(id
))
2032 if (ata_id_is_ata(id
))
2036 if (!tried_spinup
&& (id
[2] == 0x37c8 || id
[2] == 0x738c)) {
2039 * Drive powered-up in standby mode, and requires a specific
2040 * SET_FEATURES spin-up subcommand before it will accept
2041 * anything other than the original IDENTIFY command.
2043 err_mask
= ata_dev_set_feature(dev
, SETFEATURES_SPINUP
, 0);
2044 if (err_mask
&& id
[2] != 0x738c) {
2046 reason
= "SPINUP failed";
2050 * If the drive initially returned incomplete IDENTIFY info,
2051 * we now must reissue the IDENTIFY command.
2053 if (id
[2] == 0x37c8)
2057 if ((flags
& ATA_READID_POSTRESET
) && class == ATA_DEV_ATA
) {
2059 * The exact sequence expected by certain pre-ATA4 drives is:
2061 * IDENTIFY (optional in early ATA)
2062 * INITIALIZE DEVICE PARAMETERS (later IDE and ATA)
2064 * Some drives were very specific about that exact sequence.
2066 * Note that ATA4 says lba is mandatory so the second check
2067 * shoud never trigger.
2069 if (ata_id_major_version(id
) < 4 || !ata_id_has_lba(id
)) {
2070 err_mask
= ata_dev_init_params(dev
, id
[3], id
[6]);
2073 reason
= "INIT_DEV_PARAMS failed";
2077 /* current CHS translation info (id[53-58]) might be
2078 * changed. reread the identify device info.
2080 flags
&= ~ATA_READID_POSTRESET
;
2090 if (ata_msg_warn(ap
))
2091 ata_dev_printk(dev
, KERN_WARNING
, "failed to IDENTIFY "
2092 "(%s, err_mask=0x%x)\n", reason
, err_mask
);
2096 static inline u8
ata_dev_knobble(struct ata_device
*dev
)
2098 struct ata_port
*ap
= dev
->link
->ap
;
2099 return ((ap
->cbl
== ATA_CBL_SATA
) && (!ata_id_is_sata(dev
->id
)));
2102 static void ata_dev_config_ncq(struct ata_device
*dev
,
2103 char *desc
, size_t desc_sz
)
2105 struct ata_port
*ap
= dev
->link
->ap
;
2106 int hdepth
= 0, ddepth
= ata_id_queue_depth(dev
->id
);
2108 if (!ata_id_has_ncq(dev
->id
)) {
2112 if (dev
->horkage
& ATA_HORKAGE_NONCQ
) {
2113 snprintf(desc
, desc_sz
, "NCQ (not used)");
2116 if (ap
->flags
& ATA_FLAG_NCQ
) {
2117 hdepth
= min(ap
->scsi_host
->can_queue
, ATA_MAX_QUEUE
- 1);
2118 dev
->flags
|= ATA_DFLAG_NCQ
;
2121 if (hdepth
>= ddepth
)
2122 snprintf(desc
, desc_sz
, "NCQ (depth %d)", ddepth
);
2124 snprintf(desc
, desc_sz
, "NCQ (depth %d/%d)", hdepth
, ddepth
);
2128 * ata_dev_configure - Configure the specified ATA/ATAPI device
2129 * @dev: Target device to configure
2131 * Configure @dev according to @dev->id. Generic and low-level
2132 * driver specific fixups are also applied.
2135 * Kernel thread context (may sleep)
2138 * 0 on success, -errno otherwise
2140 int ata_dev_configure(struct ata_device
*dev
)
2142 struct ata_port
*ap
= dev
->link
->ap
;
2143 struct ata_eh_context
*ehc
= &dev
->link
->eh_context
;
2144 int print_info
= ehc
->i
.flags
& ATA_EHI_PRINTINFO
;
2145 const u16
*id
= dev
->id
;
2146 unsigned long xfer_mask
;
2147 char revbuf
[7]; /* XYZ-99\0 */
2148 char fwrevbuf
[ATA_ID_FW_REV_LEN
+1];
2149 char modelbuf
[ATA_ID_PROD_LEN
+1];
2152 if (!ata_dev_enabled(dev
) && ata_msg_info(ap
)) {
2153 ata_dev_printk(dev
, KERN_INFO
, "%s: ENTER/EXIT -- nodev\n",
2158 if (ata_msg_probe(ap
))
2159 ata_dev_printk(dev
, KERN_DEBUG
, "%s: ENTER\n", __func__
);
2162 dev
->horkage
|= ata_dev_blacklisted(dev
);
2163 ata_force_horkage(dev
);
2165 /* let ACPI work its magic */
2166 rc
= ata_acpi_on_devcfg(dev
);
2170 /* massage HPA, do it early as it might change IDENTIFY data */
2171 rc
= ata_hpa_resize(dev
);
2175 /* print device capabilities */
2176 if (ata_msg_probe(ap
))
2177 ata_dev_printk(dev
, KERN_DEBUG
,
2178 "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x "
2179 "85:%04x 86:%04x 87:%04x 88:%04x\n",
2181 id
[49], id
[82], id
[83], id
[84],
2182 id
[85], id
[86], id
[87], id
[88]);
2184 /* initialize to-be-configured parameters */
2185 dev
->flags
&= ~ATA_DFLAG_CFG_MASK
;
2186 dev
->max_sectors
= 0;
2194 * common ATA, ATAPI feature tests
2197 /* find max transfer mode; for printk only */
2198 xfer_mask
= ata_id_xfermask(id
);
2200 if (ata_msg_probe(ap
))
2203 /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */
2204 ata_id_c_string(dev
->id
, fwrevbuf
, ATA_ID_FW_REV
,
2207 ata_id_c_string(dev
->id
, modelbuf
, ATA_ID_PROD
,
2210 /* ATA-specific feature tests */
2211 if (dev
->class == ATA_DEV_ATA
) {
2212 if (ata_id_is_cfa(id
)) {
2213 if (id
[162] & 1) /* CPRM may make this media unusable */
2214 ata_dev_printk(dev
, KERN_WARNING
,
2215 "supports DRM functions and may "
2216 "not be fully accessable.\n");
2217 snprintf(revbuf
, 7, "CFA");
2219 snprintf(revbuf
, 7, "ATA-%d", ata_id_major_version(id
));
2220 /* Warn the user if the device has TPM extensions */
2221 if (ata_id_has_tpm(id
))
2222 ata_dev_printk(dev
, KERN_WARNING
,
2223 "supports DRM functions and may "
2224 "not be fully accessable.\n");
2227 dev
->n_sectors
= ata_id_n_sectors(id
);
2229 if (dev
->id
[59] & 0x100)
2230 dev
->multi_count
= dev
->id
[59] & 0xff;
2232 if (ata_id_has_lba(id
)) {
2233 const char *lba_desc
;
2237 dev
->flags
|= ATA_DFLAG_LBA
;
2238 if (ata_id_has_lba48(id
)) {
2239 dev
->flags
|= ATA_DFLAG_LBA48
;
2242 if (dev
->n_sectors
>= (1UL << 28) &&
2243 ata_id_has_flush_ext(id
))
2244 dev
->flags
|= ATA_DFLAG_FLUSH_EXT
;
2248 ata_dev_config_ncq(dev
, ncq_desc
, sizeof(ncq_desc
));
2250 /* print device info to dmesg */
2251 if (ata_msg_drv(ap
) && print_info
) {
2252 ata_dev_printk(dev
, KERN_INFO
,
2253 "%s: %s, %s, max %s\n",
2254 revbuf
, modelbuf
, fwrevbuf
,
2255 ata_mode_string(xfer_mask
));
2256 ata_dev_printk(dev
, KERN_INFO
,
2257 "%Lu sectors, multi %u: %s %s\n",
2258 (unsigned long long)dev
->n_sectors
,
2259 dev
->multi_count
, lba_desc
, ncq_desc
);
2264 /* Default translation */
2265 dev
->cylinders
= id
[1];
2267 dev
->sectors
= id
[6];
2269 if (ata_id_current_chs_valid(id
)) {
2270 /* Current CHS translation is valid. */
2271 dev
->cylinders
= id
[54];
2272 dev
->heads
= id
[55];
2273 dev
->sectors
= id
[56];
2276 /* print device info to dmesg */
2277 if (ata_msg_drv(ap
) && print_info
) {
2278 ata_dev_printk(dev
, KERN_INFO
,
2279 "%s: %s, %s, max %s\n",
2280 revbuf
, modelbuf
, fwrevbuf
,
2281 ata_mode_string(xfer_mask
));
2282 ata_dev_printk(dev
, KERN_INFO
,
2283 "%Lu sectors, multi %u, CHS %u/%u/%u\n",
2284 (unsigned long long)dev
->n_sectors
,
2285 dev
->multi_count
, dev
->cylinders
,
2286 dev
->heads
, dev
->sectors
);
2293 /* ATAPI-specific feature tests */
2294 else if (dev
->class == ATA_DEV_ATAPI
) {
2295 const char *cdb_intr_string
= "";
2296 const char *atapi_an_string
= "";
2297 const char *dma_dir_string
= "";
2300 rc
= atapi_cdb_len(id
);
2301 if ((rc
< 12) || (rc
> ATAPI_CDB_LEN
)) {
2302 if (ata_msg_warn(ap
))
2303 ata_dev_printk(dev
, KERN_WARNING
,
2304 "unsupported CDB len\n");
2308 dev
->cdb_len
= (unsigned int) rc
;
2310 /* Enable ATAPI AN if both the host and device have
2311 * the support. If PMP is attached, SNTF is required
2312 * to enable ATAPI AN to discern between PHY status
2313 * changed notifications and ATAPI ANs.
2315 if ((ap
->flags
& ATA_FLAG_AN
) && ata_id_has_atapi_AN(id
) &&
2316 (!ap
->nr_pmp_links
||
2317 sata_scr_read(&ap
->link
, SCR_NOTIFICATION
, &sntf
) == 0)) {
2318 unsigned int err_mask
;
2320 /* issue SET feature command to turn this on */
2321 err_mask
= ata_dev_set_feature(dev
,
2322 SETFEATURES_SATA_ENABLE
, SATA_AN
);
2324 ata_dev_printk(dev
, KERN_ERR
,
2325 "failed to enable ATAPI AN "
2326 "(err_mask=0x%x)\n", err_mask
);
2328 dev
->flags
|= ATA_DFLAG_AN
;
2329 atapi_an_string
= ", ATAPI AN";
2333 if (ata_id_cdb_intr(dev
->id
)) {
2334 dev
->flags
|= ATA_DFLAG_CDB_INTR
;
2335 cdb_intr_string
= ", CDB intr";
2338 if (atapi_dmadir
|| atapi_id_dmadir(dev
->id
)) {
2339 dev
->flags
|= ATA_DFLAG_DMADIR
;
2340 dma_dir_string
= ", DMADIR";
2343 /* print device info to dmesg */
2344 if (ata_msg_drv(ap
) && print_info
)
2345 ata_dev_printk(dev
, KERN_INFO
,
2346 "ATAPI: %s, %s, max %s%s%s%s\n",
2348 ata_mode_string(xfer_mask
),
2349 cdb_intr_string
, atapi_an_string
,
2353 /* determine max_sectors */
2354 dev
->max_sectors
= ATA_MAX_SECTORS
;
2355 if (dev
->flags
& ATA_DFLAG_LBA48
)
2356 dev
->max_sectors
= ATA_MAX_SECTORS_LBA48
;
2358 if (!(dev
->horkage
& ATA_HORKAGE_IPM
)) {
2359 if (ata_id_has_hipm(dev
->id
))
2360 dev
->flags
|= ATA_DFLAG_HIPM
;
2361 if (ata_id_has_dipm(dev
->id
))
2362 dev
->flags
|= ATA_DFLAG_DIPM
;
2365 /* Limit PATA drive on SATA cable bridge transfers to udma5,
2367 if (ata_dev_knobble(dev
)) {
2368 if (ata_msg_drv(ap
) && print_info
)
2369 ata_dev_printk(dev
, KERN_INFO
,
2370 "applying bridge limits\n");
2371 dev
->udma_mask
&= ATA_UDMA5
;
2372 dev
->max_sectors
= ATA_MAX_SECTORS
;
2375 if ((dev
->class == ATA_DEV_ATAPI
) &&
2376 (atapi_command_packet_set(id
) == TYPE_TAPE
)) {
2377 dev
->max_sectors
= ATA_MAX_SECTORS_TAPE
;
2378 dev
->horkage
|= ATA_HORKAGE_STUCK_ERR
;
2381 if (dev
->horkage
& ATA_HORKAGE_MAX_SEC_128
)
2382 dev
->max_sectors
= min_t(unsigned int, ATA_MAX_SECTORS_128
,
2385 if (ata_dev_blacklisted(dev
) & ATA_HORKAGE_IPM
) {
2386 dev
->horkage
|= ATA_HORKAGE_IPM
;
2388 /* reset link pm_policy for this port to no pm */
2389 ap
->pm_policy
= MAX_PERFORMANCE
;
2392 if (ap
->ops
->dev_config
)
2393 ap
->ops
->dev_config(dev
);
2395 if (dev
->horkage
& ATA_HORKAGE_DIAGNOSTIC
) {
2396 /* Let the user know. We don't want to disallow opens for
2397 rescue purposes, or in case the vendor is just a blithering
2398 idiot. Do this after the dev_config call as some controllers
2399 with buggy firmware may want to avoid reporting false device
2403 ata_dev_printk(dev
, KERN_WARNING
,
2404 "Drive reports diagnostics failure. This may indicate a drive\n");
2405 ata_dev_printk(dev
, KERN_WARNING
,
2406 "fault or invalid emulation. Contact drive vendor for information.\n");
2413 if (ata_msg_probe(ap
))
2414 ata_dev_printk(dev
, KERN_DEBUG
,
2415 "%s: EXIT, err\n", __func__
);
2420 * ata_cable_40wire - return 40 wire cable type
2423 * Helper method for drivers which want to hardwire 40 wire cable
2427 int ata_cable_40wire(struct ata_port
*ap
)
2429 return ATA_CBL_PATA40
;
2433 * ata_cable_80wire - return 80 wire cable type
2436 * Helper method for drivers which want to hardwire 80 wire cable
2440 int ata_cable_80wire(struct ata_port
*ap
)
2442 return ATA_CBL_PATA80
;
2446 * ata_cable_unknown - return unknown PATA cable.
2449 * Helper method for drivers which have no PATA cable detection.
2452 int ata_cable_unknown(struct ata_port
*ap
)
2454 return ATA_CBL_PATA_UNK
;
2458 * ata_cable_ignore - return ignored PATA cable.
2461 * Helper method for drivers which don't use cable type to limit
2464 int ata_cable_ignore(struct ata_port
*ap
)
2466 return ATA_CBL_PATA_IGN
;
2470 * ata_cable_sata - return SATA cable type
2473 * Helper method for drivers which have SATA cables
2476 int ata_cable_sata(struct ata_port
*ap
)
2478 return ATA_CBL_SATA
;
2482 * ata_bus_probe - Reset and probe ATA bus
2485 * Master ATA bus probing function. Initiates a hardware-dependent
2486 * bus reset, then attempts to identify any devices found on
2490 * PCI/etc. bus probe sem.
2493 * Zero on success, negative errno otherwise.
2496 int ata_bus_probe(struct ata_port
*ap
)
2498 unsigned int classes
[ATA_MAX_DEVICES
];
2499 int tries
[ATA_MAX_DEVICES
];
2501 struct ata_device
*dev
;
2505 ata_link_for_each_dev(dev
, &ap
->link
)
2506 tries
[dev
->devno
] = ATA_PROBE_MAX_TRIES
;
2509 ata_link_for_each_dev(dev
, &ap
->link
) {
2510 /* If we issue an SRST then an ATA drive (not ATAPI)
2511 * may change configuration and be in PIO0 timing. If
2512 * we do a hard reset (or are coming from power on)
2513 * this is true for ATA or ATAPI. Until we've set a
2514 * suitable controller mode we should not touch the
2515 * bus as we may be talking too fast.
2517 dev
->pio_mode
= XFER_PIO_0
;
2519 /* If the controller has a pio mode setup function
2520 * then use it to set the chipset to rights. Don't
2521 * touch the DMA setup as that will be dealt with when
2522 * configuring devices.
2524 if (ap
->ops
->set_piomode
)
2525 ap
->ops
->set_piomode(ap
, dev
);
2528 /* reset and determine device classes */
2529 ap
->ops
->phy_reset(ap
);
2531 ata_link_for_each_dev(dev
, &ap
->link
) {
2532 if (!(ap
->flags
& ATA_FLAG_DISABLED
) &&
2533 dev
->class != ATA_DEV_UNKNOWN
)
2534 classes
[dev
->devno
] = dev
->class;
2536 classes
[dev
->devno
] = ATA_DEV_NONE
;
2538 dev
->class = ATA_DEV_UNKNOWN
;
2543 /* read IDENTIFY page and configure devices. We have to do the identify
2544 specific sequence bass-ackwards so that PDIAG- is released by
2547 ata_link_for_each_dev_reverse(dev
, &ap
->link
) {
2548 if (tries
[dev
->devno
])
2549 dev
->class = classes
[dev
->devno
];
2551 if (!ata_dev_enabled(dev
))
2554 rc
= ata_dev_read_id(dev
, &dev
->class, ATA_READID_POSTRESET
,
2560 /* Now ask for the cable type as PDIAG- should have been released */
2561 if (ap
->ops
->cable_detect
)
2562 ap
->cbl
= ap
->ops
->cable_detect(ap
);
2564 /* We may have SATA bridge glue hiding here irrespective of the
2565 reported cable types and sensed types */
2566 ata_link_for_each_dev(dev
, &ap
->link
) {
2567 if (!ata_dev_enabled(dev
))
2569 /* SATA drives indicate we have a bridge. We don't know which
2570 end of the link the bridge is which is a problem */
2571 if (ata_id_is_sata(dev
->id
))
2572 ap
->cbl
= ATA_CBL_SATA
;
2575 /* After the identify sequence we can now set up the devices. We do
2576 this in the normal order so that the user doesn't get confused */
2578 ata_link_for_each_dev(dev
, &ap
->link
) {
2579 if (!ata_dev_enabled(dev
))
2582 ap
->link
.eh_context
.i
.flags
|= ATA_EHI_PRINTINFO
;
2583 rc
= ata_dev_configure(dev
);
2584 ap
->link
.eh_context
.i
.flags
&= ~ATA_EHI_PRINTINFO
;
2589 /* configure transfer mode */
2590 rc
= ata_set_mode(&ap
->link
, &dev
);
2594 ata_link_for_each_dev(dev
, &ap
->link
)
2595 if (ata_dev_enabled(dev
))
2598 /* no device present, disable port */
2599 ata_port_disable(ap
);
2603 tries
[dev
->devno
]--;
2607 /* eeek, something went very wrong, give up */
2608 tries
[dev
->devno
] = 0;
2612 /* give it just one more chance */
2613 tries
[dev
->devno
] = min(tries
[dev
->devno
], 1);
2615 if (tries
[dev
->devno
] == 1) {
2616 /* This is the last chance, better to slow
2617 * down than lose it.
2619 sata_down_spd_limit(&ap
->link
);
2620 ata_down_xfermask_limit(dev
, ATA_DNXFER_PIO
);
2624 if (!tries
[dev
->devno
])
2625 ata_dev_disable(dev
);
2631 * ata_port_probe - Mark port as enabled
2632 * @ap: Port for which we indicate enablement
2634 * Modify @ap data structure such that the system
2635 * thinks that the entire port is enabled.
2637 * LOCKING: host lock, or some other form of
2641 void ata_port_probe(struct ata_port
*ap
)
2643 ap
->flags
&= ~ATA_FLAG_DISABLED
;
2647 * sata_print_link_status - Print SATA link status
2648 * @link: SATA link to printk link status about
2650 * This function prints link speed and status of a SATA link.
2655 void sata_print_link_status(struct ata_link
*link
)
2657 u32 sstatus
, scontrol
, tmp
;
2659 if (sata_scr_read(link
, SCR_STATUS
, &sstatus
))
2661 sata_scr_read(link
, SCR_CONTROL
, &scontrol
);
2663 if (ata_link_online(link
)) {
2664 tmp
= (sstatus
>> 4) & 0xf;
2665 ata_link_printk(link
, KERN_INFO
,
2666 "SATA link up %s (SStatus %X SControl %X)\n",
2667 sata_spd_string(tmp
), sstatus
, scontrol
);
2669 ata_link_printk(link
, KERN_INFO
,
2670 "SATA link down (SStatus %X SControl %X)\n",
2676 * ata_dev_pair - return other device on cable
2679 * Obtain the other device on the same cable, or if none is
2680 * present NULL is returned
2683 struct ata_device
*ata_dev_pair(struct ata_device
*adev
)
2685 struct ata_link
*link
= adev
->link
;
2686 struct ata_device
*pair
= &link
->device
[1 - adev
->devno
];
2687 if (!ata_dev_enabled(pair
))
2693 * ata_port_disable - Disable port.
2694 * @ap: Port to be disabled.
2696 * Modify @ap data structure such that the system
2697 * thinks that the entire port is disabled, and should
2698 * never attempt to probe or communicate with devices
2701 * LOCKING: host lock, or some other form of
2705 void ata_port_disable(struct ata_port
*ap
)
2707 ap
->link
.device
[0].class = ATA_DEV_NONE
;
2708 ap
->link
.device
[1].class = ATA_DEV_NONE
;
2709 ap
->flags
|= ATA_FLAG_DISABLED
;
2713 * sata_down_spd_limit - adjust SATA spd limit downward
2714 * @link: Link to adjust SATA spd limit for
2716 * Adjust SATA spd limit of @link downward. Note that this
2717 * function only adjusts the limit. The change must be applied
2718 * using sata_set_spd().
2721 * Inherited from caller.
2724 * 0 on success, negative errno on failure
2726 int sata_down_spd_limit(struct ata_link
*link
)
2728 u32 sstatus
, spd
, mask
;
2731 if (!sata_scr_valid(link
))
2734 /* If SCR can be read, use it to determine the current SPD.
2735 * If not, use cached value in link->sata_spd.
2737 rc
= sata_scr_read(link
, SCR_STATUS
, &sstatus
);
2739 spd
= (sstatus
>> 4) & 0xf;
2741 spd
= link
->sata_spd
;
2743 mask
= link
->sata_spd_limit
;
2747 /* unconditionally mask off the highest bit */
2748 highbit
= fls(mask
) - 1;
2749 mask
&= ~(1 << highbit
);
2751 /* Mask off all speeds higher than or equal to the current
2752 * one. Force 1.5Gbps if current SPD is not available.
2755 mask
&= (1 << (spd
- 1)) - 1;
2759 /* were we already at the bottom? */
2763 link
->sata_spd_limit
= mask
;
2765 ata_link_printk(link
, KERN_WARNING
, "limiting SATA link speed to %s\n",
2766 sata_spd_string(fls(mask
)));
2771 static int __sata_set_spd_needed(struct ata_link
*link
, u32
*scontrol
)
2773 struct ata_link
*host_link
= &link
->ap
->link
;
2774 u32 limit
, target
, spd
;
2776 limit
= link
->sata_spd_limit
;
2778 /* Don't configure downstream link faster than upstream link.
2779 * It doesn't speed up anything and some PMPs choke on such
2782 if (!ata_is_host_link(link
) && host_link
->sata_spd
)
2783 limit
&= (1 << host_link
->sata_spd
) - 1;
2785 if (limit
== UINT_MAX
)
2788 target
= fls(limit
);
2790 spd
= (*scontrol
>> 4) & 0xf;
2791 *scontrol
= (*scontrol
& ~0xf0) | ((target
& 0xf) << 4);
2793 return spd
!= target
;
2797 * sata_set_spd_needed - is SATA spd configuration needed
2798 * @link: Link in question
2800 * Test whether the spd limit in SControl matches
2801 * @link->sata_spd_limit. This function is used to determine
2802 * whether hardreset is necessary to apply SATA spd
2806 * Inherited from caller.
2809 * 1 if SATA spd configuration is needed, 0 otherwise.
2811 int sata_set_spd_needed(struct ata_link
*link
)
2815 if (sata_scr_read(link
, SCR_CONTROL
, &scontrol
))
2818 return __sata_set_spd_needed(link
, &scontrol
);
2822 * sata_set_spd - set SATA spd according to spd limit
2823 * @link: Link to set SATA spd for
2825 * Set SATA spd of @link according to sata_spd_limit.
2828 * Inherited from caller.
2831 * 0 if spd doesn't need to be changed, 1 if spd has been
2832 * changed. Negative errno if SCR registers are inaccessible.
2834 int sata_set_spd(struct ata_link
*link
)
2839 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
2842 if (!__sata_set_spd_needed(link
, &scontrol
))
2845 if ((rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
)))
2852 * This mode timing computation functionality is ported over from
2853 * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik
2856 * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
2857 * These were taken from ATA/ATAPI-6 standard, rev 0a, except
2858 * for UDMA6, which is currently supported only by Maxtor drives.
2860 * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0.
2863 static const struct ata_timing ata_timing
[] = {
2864 /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */
2865 { XFER_PIO_0
, 70, 290, 240, 600, 165, 150, 600, 0 },
2866 { XFER_PIO_1
, 50, 290, 93, 383, 125, 100, 383, 0 },
2867 { XFER_PIO_2
, 30, 290, 40, 330, 100, 90, 240, 0 },
2868 { XFER_PIO_3
, 30, 80, 70, 180, 80, 70, 180, 0 },
2869 { XFER_PIO_4
, 25, 70, 25, 120, 70, 25, 120, 0 },
2870 { XFER_PIO_5
, 15, 65, 25, 100, 65, 25, 100, 0 },
2871 { XFER_PIO_6
, 10, 55, 20, 80, 55, 20, 80, 0 },
2873 { XFER_SW_DMA_0
, 120, 0, 0, 0, 480, 480, 960, 0 },
2874 { XFER_SW_DMA_1
, 90, 0, 0, 0, 240, 240, 480, 0 },
2875 { XFER_SW_DMA_2
, 60, 0, 0, 0, 120, 120, 240, 0 },
2877 { XFER_MW_DMA_0
, 60, 0, 0, 0, 215, 215, 480, 0 },
2878 { XFER_MW_DMA_1
, 45, 0, 0, 0, 80, 50, 150, 0 },
2879 { XFER_MW_DMA_2
, 25, 0, 0, 0, 70, 25, 120, 0 },
2880 { XFER_MW_DMA_3
, 25, 0, 0, 0, 65, 25, 100, 0 },
2881 { XFER_MW_DMA_4
, 25, 0, 0, 0, 55, 20, 80, 0 },
2883 /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */
2884 { XFER_UDMA_0
, 0, 0, 0, 0, 0, 0, 0, 120 },
2885 { XFER_UDMA_1
, 0, 0, 0, 0, 0, 0, 0, 80 },
2886 { XFER_UDMA_2
, 0, 0, 0, 0, 0, 0, 0, 60 },
2887 { XFER_UDMA_3
, 0, 0, 0, 0, 0, 0, 0, 45 },
2888 { XFER_UDMA_4
, 0, 0, 0, 0, 0, 0, 0, 30 },
2889 { XFER_UDMA_5
, 0, 0, 0, 0, 0, 0, 0, 20 },
2890 { XFER_UDMA_6
, 0, 0, 0, 0, 0, 0, 0, 15 },
2895 #define ENOUGH(v, unit) (((v)-1)/(unit)+1)
2896 #define EZ(v, unit) ((v)?ENOUGH(v, unit):0)
2898 static void ata_timing_quantize(const struct ata_timing
*t
, struct ata_timing
*q
, int T
, int UT
)
2900 q
->setup
= EZ(t
->setup
* 1000, T
);
2901 q
->act8b
= EZ(t
->act8b
* 1000, T
);
2902 q
->rec8b
= EZ(t
->rec8b
* 1000, T
);
2903 q
->cyc8b
= EZ(t
->cyc8b
* 1000, T
);
2904 q
->active
= EZ(t
->active
* 1000, T
);
2905 q
->recover
= EZ(t
->recover
* 1000, T
);
2906 q
->cycle
= EZ(t
->cycle
* 1000, T
);
2907 q
->udma
= EZ(t
->udma
* 1000, UT
);
2910 void ata_timing_merge(const struct ata_timing
*a
, const struct ata_timing
*b
,
2911 struct ata_timing
*m
, unsigned int what
)
2913 if (what
& ATA_TIMING_SETUP
) m
->setup
= max(a
->setup
, b
->setup
);
2914 if (what
& ATA_TIMING_ACT8B
) m
->act8b
= max(a
->act8b
, b
->act8b
);
2915 if (what
& ATA_TIMING_REC8B
) m
->rec8b
= max(a
->rec8b
, b
->rec8b
);
2916 if (what
& ATA_TIMING_CYC8B
) m
->cyc8b
= max(a
->cyc8b
, b
->cyc8b
);
2917 if (what
& ATA_TIMING_ACTIVE
) m
->active
= max(a
->active
, b
->active
);
2918 if (what
& ATA_TIMING_RECOVER
) m
->recover
= max(a
->recover
, b
->recover
);
2919 if (what
& ATA_TIMING_CYCLE
) m
->cycle
= max(a
->cycle
, b
->cycle
);
2920 if (what
& ATA_TIMING_UDMA
) m
->udma
= max(a
->udma
, b
->udma
);
2923 const struct ata_timing
*ata_timing_find_mode(u8 xfer_mode
)
2925 const struct ata_timing
*t
= ata_timing
;
2927 while (xfer_mode
> t
->mode
)
2930 if (xfer_mode
== t
->mode
)
2935 int ata_timing_compute(struct ata_device
*adev
, unsigned short speed
,
2936 struct ata_timing
*t
, int T
, int UT
)
2938 const struct ata_timing
*s
;
2939 struct ata_timing p
;
2945 if (!(s
= ata_timing_find_mode(speed
)))
2948 memcpy(t
, s
, sizeof(*s
));
2951 * If the drive is an EIDE drive, it can tell us it needs extended
2952 * PIO/MW_DMA cycle timing.
2955 if (adev
->id
[ATA_ID_FIELD_VALID
] & 2) { /* EIDE drive */
2956 memset(&p
, 0, sizeof(p
));
2957 if (speed
>= XFER_PIO_0
&& speed
<= XFER_SW_DMA_0
) {
2958 if (speed
<= XFER_PIO_2
) p
.cycle
= p
.cyc8b
= adev
->id
[ATA_ID_EIDE_PIO
];
2959 else p
.cycle
= p
.cyc8b
= adev
->id
[ATA_ID_EIDE_PIO_IORDY
];
2960 } else if (speed
>= XFER_MW_DMA_0
&& speed
<= XFER_MW_DMA_2
) {
2961 p
.cycle
= adev
->id
[ATA_ID_EIDE_DMA_MIN
];
2963 ata_timing_merge(&p
, t
, t
, ATA_TIMING_CYCLE
| ATA_TIMING_CYC8B
);
2967 * Convert the timing to bus clock counts.
2970 ata_timing_quantize(t
, t
, T
, UT
);
2973 * Even in DMA/UDMA modes we still use PIO access for IDENTIFY,
2974 * S.M.A.R.T * and some other commands. We have to ensure that the
2975 * DMA cycle timing is slower/equal than the fastest PIO timing.
2978 if (speed
> XFER_PIO_6
) {
2979 ata_timing_compute(adev
, adev
->pio_mode
, &p
, T
, UT
);
2980 ata_timing_merge(&p
, t
, t
, ATA_TIMING_ALL
);
2984 * Lengthen active & recovery time so that cycle time is correct.
2987 if (t
->act8b
+ t
->rec8b
< t
->cyc8b
) {
2988 t
->act8b
+= (t
->cyc8b
- (t
->act8b
+ t
->rec8b
)) / 2;
2989 t
->rec8b
= t
->cyc8b
- t
->act8b
;
2992 if (t
->active
+ t
->recover
< t
->cycle
) {
2993 t
->active
+= (t
->cycle
- (t
->active
+ t
->recover
)) / 2;
2994 t
->recover
= t
->cycle
- t
->active
;
2997 /* In a few cases quantisation may produce enough errors to
2998 leave t->cycle too low for the sum of active and recovery
2999 if so we must correct this */
3000 if (t
->active
+ t
->recover
> t
->cycle
)
3001 t
->cycle
= t
->active
+ t
->recover
;
3007 * ata_timing_cycle2mode - find xfer mode for the specified cycle duration
3008 * @xfer_shift: ATA_SHIFT_* value for transfer type to examine.
3009 * @cycle: cycle duration in ns
3011 * Return matching xfer mode for @cycle. The returned mode is of
3012 * the transfer type specified by @xfer_shift. If @cycle is too
3013 * slow for @xfer_shift, 0xff is returned. If @cycle is faster
3014 * than the fastest known mode, the fasted mode is returned.
3020 * Matching xfer_mode, 0xff if no match found.
3022 u8
ata_timing_cycle2mode(unsigned int xfer_shift
, int cycle
)
3024 u8 base_mode
= 0xff, last_mode
= 0xff;
3025 const struct ata_xfer_ent
*ent
;
3026 const struct ata_timing
*t
;
3028 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
3029 if (ent
->shift
== xfer_shift
)
3030 base_mode
= ent
->base
;
3032 for (t
= ata_timing_find_mode(base_mode
);
3033 t
&& ata_xfer_mode2shift(t
->mode
) == xfer_shift
; t
++) {
3034 unsigned short this_cycle
;
3036 switch (xfer_shift
) {
3038 case ATA_SHIFT_MWDMA
:
3039 this_cycle
= t
->cycle
;
3041 case ATA_SHIFT_UDMA
:
3042 this_cycle
= t
->udma
;
3048 if (cycle
> this_cycle
)
3051 last_mode
= t
->mode
;
3058 * ata_down_xfermask_limit - adjust dev xfer masks downward
3059 * @dev: Device to adjust xfer masks
3060 * @sel: ATA_DNXFER_* selector
3062 * Adjust xfer masks of @dev downward. Note that this function
3063 * does not apply the change. Invoking ata_set_mode() afterwards
3064 * will apply the limit.
3067 * Inherited from caller.
3070 * 0 on success, negative errno on failure
3072 int ata_down_xfermask_limit(struct ata_device
*dev
, unsigned int sel
)
3075 unsigned long orig_mask
, xfer_mask
;
3076 unsigned long pio_mask
, mwdma_mask
, udma_mask
;
3079 quiet
= !!(sel
& ATA_DNXFER_QUIET
);
3080 sel
&= ~ATA_DNXFER_QUIET
;
3082 xfer_mask
= orig_mask
= ata_pack_xfermask(dev
->pio_mask
,
3085 ata_unpack_xfermask(xfer_mask
, &pio_mask
, &mwdma_mask
, &udma_mask
);
3088 case ATA_DNXFER_PIO
:
3089 highbit
= fls(pio_mask
) - 1;
3090 pio_mask
&= ~(1 << highbit
);
3093 case ATA_DNXFER_DMA
:
3095 highbit
= fls(udma_mask
) - 1;
3096 udma_mask
&= ~(1 << highbit
);
3099 } else if (mwdma_mask
) {
3100 highbit
= fls(mwdma_mask
) - 1;
3101 mwdma_mask
&= ~(1 << highbit
);
3107 case ATA_DNXFER_40C
:
3108 udma_mask
&= ATA_UDMA_MASK_40C
;
3111 case ATA_DNXFER_FORCE_PIO0
:
3113 case ATA_DNXFER_FORCE_PIO
:
3122 xfer_mask
&= ata_pack_xfermask(pio_mask
, mwdma_mask
, udma_mask
);
3124 if (!(xfer_mask
& ATA_MASK_PIO
) || xfer_mask
== orig_mask
)
3128 if (xfer_mask
& (ATA_MASK_MWDMA
| ATA_MASK_UDMA
))
3129 snprintf(buf
, sizeof(buf
), "%s:%s",
3130 ata_mode_string(xfer_mask
),
3131 ata_mode_string(xfer_mask
& ATA_MASK_PIO
));
3133 snprintf(buf
, sizeof(buf
), "%s",
3134 ata_mode_string(xfer_mask
));
3136 ata_dev_printk(dev
, KERN_WARNING
,
3137 "limiting speed to %s\n", buf
);
3140 ata_unpack_xfermask(xfer_mask
, &dev
->pio_mask
, &dev
->mwdma_mask
,
3146 static int ata_dev_set_mode(struct ata_device
*dev
)
3148 struct ata_eh_context
*ehc
= &dev
->link
->eh_context
;
3149 const char *dev_err_whine
= "";
3150 int ign_dev_err
= 0;
3151 unsigned int err_mask
;
3154 dev
->flags
&= ~ATA_DFLAG_PIO
;
3155 if (dev
->xfer_shift
== ATA_SHIFT_PIO
)
3156 dev
->flags
|= ATA_DFLAG_PIO
;
3158 err_mask
= ata_dev_set_xfermode(dev
);
3160 if (err_mask
& ~AC_ERR_DEV
)
3164 ehc
->i
.flags
|= ATA_EHI_POST_SETMODE
;
3165 rc
= ata_dev_revalidate(dev
, ATA_DEV_UNKNOWN
, 0);
3166 ehc
->i
.flags
&= ~ATA_EHI_POST_SETMODE
;
3170 /* Old CFA may refuse this command, which is just fine */
3171 if (dev
->xfer_shift
== ATA_SHIFT_PIO
&& ata_id_is_cfa(dev
->id
))
3174 /* Some very old devices and some bad newer ones fail any kind of
3175 SET_XFERMODE request but support PIO0-2 timings and no IORDY */
3176 if (dev
->xfer_shift
== ATA_SHIFT_PIO
&& !ata_id_has_iordy(dev
->id
) &&
3177 dev
->pio_mode
<= XFER_PIO_2
)
3180 /* Early MWDMA devices do DMA but don't allow DMA mode setting.
3181 Don't fail an MWDMA0 set IFF the device indicates it is in MWDMA0 */
3182 if (dev
->xfer_shift
== ATA_SHIFT_MWDMA
&&
3183 dev
->dma_mode
== XFER_MW_DMA_0
&&
3184 (dev
->id
[63] >> 8) & 1)
3187 /* if the device is actually configured correctly, ignore dev err */
3188 if (dev
->xfer_mode
== ata_xfer_mask2mode(ata_id_xfermask(dev
->id
)))
3191 if (err_mask
& AC_ERR_DEV
) {
3195 dev_err_whine
= " (device error ignored)";
3198 DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
3199 dev
->xfer_shift
, (int)dev
->xfer_mode
);
3201 ata_dev_printk(dev
, KERN_INFO
, "configured for %s%s\n",
3202 ata_mode_string(ata_xfer_mode2mask(dev
->xfer_mode
)),
3208 ata_dev_printk(dev
, KERN_ERR
, "failed to set xfermode "
3209 "(err_mask=0x%x)\n", err_mask
);
3214 * ata_do_set_mode - Program timings and issue SET FEATURES - XFER
3215 * @link: link on which timings will be programmed
3216 * @r_failed_dev: out parameter for failed device
3218 * Standard implementation of the function used to tune and set
3219 * ATA device disk transfer mode (PIO3, UDMA6, etc.). If
3220 * ata_dev_set_mode() fails, pointer to the failing device is
3221 * returned in @r_failed_dev.
3224 * PCI/etc. bus probe sem.
3227 * 0 on success, negative errno otherwise
3230 int ata_do_set_mode(struct ata_link
*link
, struct ata_device
**r_failed_dev
)
3232 struct ata_port
*ap
= link
->ap
;
3233 struct ata_device
*dev
;
3234 int rc
= 0, used_dma
= 0, found
= 0;
3236 /* step 1: calculate xfer_mask */
3237 ata_link_for_each_dev(dev
, link
) {
3238 unsigned long pio_mask
, dma_mask
;
3239 unsigned int mode_mask
;
3241 if (!ata_dev_enabled(dev
))
3244 mode_mask
= ATA_DMA_MASK_ATA
;
3245 if (dev
->class == ATA_DEV_ATAPI
)
3246 mode_mask
= ATA_DMA_MASK_ATAPI
;
3247 else if (ata_id_is_cfa(dev
->id
))
3248 mode_mask
= ATA_DMA_MASK_CFA
;
3250 ata_dev_xfermask(dev
);
3251 ata_force_xfermask(dev
);
3253 pio_mask
= ata_pack_xfermask(dev
->pio_mask
, 0, 0);
3254 dma_mask
= ata_pack_xfermask(0, dev
->mwdma_mask
, dev
->udma_mask
);
3256 if (libata_dma_mask
& mode_mask
)
3257 dma_mask
= ata_pack_xfermask(0, dev
->mwdma_mask
, dev
->udma_mask
);
3261 dev
->pio_mode
= ata_xfer_mask2mode(pio_mask
);
3262 dev
->dma_mode
= ata_xfer_mask2mode(dma_mask
);
3265 if (dev
->dma_mode
!= 0xff)
3271 /* step 2: always set host PIO timings */
3272 ata_link_for_each_dev(dev
, link
) {
3273 if (!ata_dev_enabled(dev
))
3276 if (dev
->pio_mode
== 0xff) {
3277 ata_dev_printk(dev
, KERN_WARNING
, "no PIO support\n");
3282 dev
->xfer_mode
= dev
->pio_mode
;
3283 dev
->xfer_shift
= ATA_SHIFT_PIO
;
3284 if (ap
->ops
->set_piomode
)
3285 ap
->ops
->set_piomode(ap
, dev
);
3288 /* step 3: set host DMA timings */
3289 ata_link_for_each_dev(dev
, link
) {
3290 if (!ata_dev_enabled(dev
) || dev
->dma_mode
== 0xff)
3293 dev
->xfer_mode
= dev
->dma_mode
;
3294 dev
->xfer_shift
= ata_xfer_mode2shift(dev
->dma_mode
);
3295 if (ap
->ops
->set_dmamode
)
3296 ap
->ops
->set_dmamode(ap
, dev
);
3299 /* step 4: update devices' xfer mode */
3300 ata_link_for_each_dev(dev
, link
) {
3301 /* don't update suspended devices' xfer mode */
3302 if (!ata_dev_enabled(dev
))
3305 rc
= ata_dev_set_mode(dev
);
3310 /* Record simplex status. If we selected DMA then the other
3311 * host channels are not permitted to do so.
3313 if (used_dma
&& (ap
->host
->flags
& ATA_HOST_SIMPLEX
))
3314 ap
->host
->simplex_claimed
= ap
;
3318 *r_failed_dev
= dev
;
3323 * sata_link_debounce - debounce SATA phy status
3324 * @link: ATA link to debounce SATA phy status for
3325 * @params: timing parameters { interval, duratinon, timeout } in msec
3326 * @deadline: deadline jiffies for the operation
3328 * Make sure SStatus of @link reaches stable state, determined by
3329 * holding the same value where DET is not 1 for @duration polled
3330 * every @interval, before @timeout. Timeout constraints the
3331 * beginning of the stable state. Because DET gets stuck at 1 on
3332 * some controllers after hot unplugging, this functions waits
3333 * until timeout then returns 0 if DET is stable at 1.
3335 * @timeout is further limited by @deadline. The sooner of the
3339 * Kernel thread context (may sleep)
3342 * 0 on success, -errno on failure.
3344 int sata_link_debounce(struct ata_link
*link
, const unsigned long *params
,
3345 unsigned long deadline
)
3347 unsigned long interval_msec
= params
[0];
3348 unsigned long duration
= msecs_to_jiffies(params
[1]);
3349 unsigned long last_jiffies
, t
;
3353 t
= jiffies
+ msecs_to_jiffies(params
[2]);
3354 if (time_before(t
, deadline
))
3357 if ((rc
= sata_scr_read(link
, SCR_STATUS
, &cur
)))
3362 last_jiffies
= jiffies
;
3365 msleep(interval_msec
);
3366 if ((rc
= sata_scr_read(link
, SCR_STATUS
, &cur
)))
3372 if (cur
== 1 && time_before(jiffies
, deadline
))
3374 if (time_after(jiffies
, last_jiffies
+ duration
))
3379 /* unstable, start over */
3381 last_jiffies
= jiffies
;
3383 /* Check deadline. If debouncing failed, return
3384 * -EPIPE to tell upper layer to lower link speed.
3386 if (time_after(jiffies
, deadline
))
3392 * sata_link_resume - resume SATA link
3393 * @link: ATA link to resume SATA
3394 * @params: timing parameters { interval, duratinon, timeout } in msec
3395 * @deadline: deadline jiffies for the operation
3397 * Resume SATA phy @link and debounce it.
3400 * Kernel thread context (may sleep)
3403 * 0 on success, -errno on failure.
3405 int sata_link_resume(struct ata_link
*link
, const unsigned long *params
,
3406 unsigned long deadline
)
3411 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
3414 scontrol
= (scontrol
& 0x0f0) | 0x300;
3416 if ((rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
)))
3419 /* Some PHYs react badly if SStatus is pounded immediately
3420 * after resuming. Delay 200ms before debouncing.
3424 return sata_link_debounce(link
, params
, deadline
);
3428 * ata_sff_prereset - prepare for reset
3429 * @link: ATA link to be reset
3430 * @deadline: deadline jiffies for the operation
3432 * @link is about to be reset. Initialize it. Failure from
3433 * prereset makes libata abort whole reset sequence and give up
3434 * that port, so prereset should be best-effort. It does its
3435 * best to prepare for reset sequence but if things go wrong, it
3436 * should just whine, not fail.
3439 * Kernel thread context (may sleep)
3442 * 0 on success, -errno otherwise.
3444 int ata_sff_prereset(struct ata_link
*link
, unsigned long deadline
)
3446 struct ata_port
*ap
= link
->ap
;
3447 struct ata_eh_context
*ehc
= &link
->eh_context
;
3448 const unsigned long *timing
= sata_ehc_deb_timing(ehc
);
3451 /* if we're about to do hardreset, nothing more to do */
3452 if (ehc
->i
.action
& ATA_EH_HARDRESET
)
3455 /* if SATA, resume link */
3456 if (ap
->flags
& ATA_FLAG_SATA
) {
3457 rc
= sata_link_resume(link
, timing
, deadline
);
3458 /* whine about phy resume failure but proceed */
3459 if (rc
&& rc
!= -EOPNOTSUPP
)
3460 ata_link_printk(link
, KERN_WARNING
, "failed to resume "
3461 "link for reset (errno=%d)\n", rc
);
3464 /* wait for !BSY if we don't know that no device is attached */
3465 if (!ata_link_offline(link
)) {
3466 rc
= ata_sff_wait_ready(ap
, deadline
);
3467 if (rc
&& rc
!= -ENODEV
) {
3468 ata_link_printk(link
, KERN_WARNING
, "device not ready "
3469 "(errno=%d), forcing hardreset\n", rc
);
3470 ehc
->i
.action
|= ATA_EH_HARDRESET
;
3478 * sata_link_hardreset - reset link via SATA phy reset
3479 * @link: link to reset
3480 * @timing: timing parameters { interval, duratinon, timeout } in msec
3481 * @deadline: deadline jiffies for the operation
3483 * SATA phy-reset @link using DET bits of SControl register.
3486 * Kernel thread context (may sleep)
3489 * 0 on success, -errno otherwise.
3491 int sata_link_hardreset(struct ata_link
*link
, const unsigned long *timing
,
3492 unsigned long deadline
)
3499 if (sata_set_spd_needed(link
)) {
3500 /* SATA spec says nothing about how to reconfigure
3501 * spd. To be on the safe side, turn off phy during
3502 * reconfiguration. This works for at least ICH7 AHCI
3505 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
3508 scontrol
= (scontrol
& 0x0f0) | 0x304;
3510 if ((rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
)))
3516 /* issue phy wake/reset */
3517 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
3520 scontrol
= (scontrol
& 0x0f0) | 0x301;
3522 if ((rc
= sata_scr_write_flush(link
, SCR_CONTROL
, scontrol
)))
3525 /* Couldn't find anything in SATA I/II specs, but AHCI-1.1
3526 * 10.4.2 says at least 1 ms.
3530 /* bring link back */
3531 rc
= sata_link_resume(link
, timing
, deadline
);
3533 DPRINTK("EXIT, rc=%d\n", rc
);
3538 * ata_sff_postreset - standard postreset callback
3539 * @link: the target ata_link
3540 * @classes: classes of attached devices
3542 * This function is invoked after a successful reset. Note that
3543 * the device might have been reset more than once using
3544 * different reset methods before postreset is invoked.
3547 * Kernel thread context (may sleep)
3549 void ata_sff_postreset(struct ata_link
*link
, unsigned int *classes
)
3551 struct ata_port
*ap
= link
->ap
;
3556 /* print link status */
3557 sata_print_link_status(link
);
3560 if (sata_scr_read(link
, SCR_ERROR
, &serror
) == 0)
3561 sata_scr_write(link
, SCR_ERROR
, serror
);
3562 link
->eh_info
.serror
= 0;
3564 /* is double-select really necessary? */
3565 if (classes
[0] != ATA_DEV_NONE
)
3566 ap
->ops
->dev_select(ap
, 1);
3567 if (classes
[1] != ATA_DEV_NONE
)
3568 ap
->ops
->dev_select(ap
, 0);
3570 /* bail out if no device is present */
3571 if (classes
[0] == ATA_DEV_NONE
&& classes
[1] == ATA_DEV_NONE
) {
3572 DPRINTK("EXIT, no device\n");
3576 /* set up device control */
3577 if (ap
->ioaddr
.ctl_addr
)
3578 iowrite8(ap
->ctl
, ap
->ioaddr
.ctl_addr
);
3584 * ata_dev_same_device - Determine whether new ID matches configured device
3585 * @dev: device to compare against
3586 * @new_class: class of the new device
3587 * @new_id: IDENTIFY page of the new device
3589 * Compare @new_class and @new_id against @dev and determine
3590 * whether @dev is the device indicated by @new_class and
3597 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
3599 static int ata_dev_same_device(struct ata_device
*dev
, unsigned int new_class
,
3602 const u16
*old_id
= dev
->id
;
3603 unsigned char model
[2][ATA_ID_PROD_LEN
+ 1];
3604 unsigned char serial
[2][ATA_ID_SERNO_LEN
+ 1];
3606 if (dev
->class != new_class
) {
3607 ata_dev_printk(dev
, KERN_INFO
, "class mismatch %d != %d\n",
3608 dev
->class, new_class
);
3612 ata_id_c_string(old_id
, model
[0], ATA_ID_PROD
, sizeof(model
[0]));
3613 ata_id_c_string(new_id
, model
[1], ATA_ID_PROD
, sizeof(model
[1]));
3614 ata_id_c_string(old_id
, serial
[0], ATA_ID_SERNO
, sizeof(serial
[0]));
3615 ata_id_c_string(new_id
, serial
[1], ATA_ID_SERNO
, sizeof(serial
[1]));
3617 if (strcmp(model
[0], model
[1])) {
3618 ata_dev_printk(dev
, KERN_INFO
, "model number mismatch "
3619 "'%s' != '%s'\n", model
[0], model
[1]);
3623 if (strcmp(serial
[0], serial
[1])) {
3624 ata_dev_printk(dev
, KERN_INFO
, "serial number mismatch "
3625 "'%s' != '%s'\n", serial
[0], serial
[1]);
3633 * ata_dev_reread_id - Re-read IDENTIFY data
3634 * @dev: target ATA device
3635 * @readid_flags: read ID flags
3637 * Re-read IDENTIFY page and make sure @dev is still attached to
3641 * Kernel thread context (may sleep)
3644 * 0 on success, negative errno otherwise
3646 int ata_dev_reread_id(struct ata_device
*dev
, unsigned int readid_flags
)
3648 unsigned int class = dev
->class;
3649 u16
*id
= (void *)dev
->link
->ap
->sector_buf
;
3653 rc
= ata_dev_read_id(dev
, &class, readid_flags
, id
);
3657 /* is the device still there? */
3658 if (!ata_dev_same_device(dev
, class, id
))
3661 memcpy(dev
->id
, id
, sizeof(id
[0]) * ATA_ID_WORDS
);
3666 * ata_dev_revalidate - Revalidate ATA device
3667 * @dev: device to revalidate
3668 * @new_class: new class code
3669 * @readid_flags: read ID flags
3671 * Re-read IDENTIFY page, make sure @dev is still attached to the
3672 * port and reconfigure it according to the new IDENTIFY page.
3675 * Kernel thread context (may sleep)
3678 * 0 on success, negative errno otherwise
3680 int ata_dev_revalidate(struct ata_device
*dev
, unsigned int new_class
,
3681 unsigned int readid_flags
)
3683 u64 n_sectors
= dev
->n_sectors
;
3686 if (!ata_dev_enabled(dev
))
3689 /* fail early if !ATA && !ATAPI to avoid issuing [P]IDENTIFY to PMP */
3690 if (ata_class_enabled(new_class
) &&
3691 new_class
!= ATA_DEV_ATA
&& new_class
!= ATA_DEV_ATAPI
) {
3692 ata_dev_printk(dev
, KERN_INFO
, "class mismatch %u != %u\n",
3693 dev
->class, new_class
);
3699 rc
= ata_dev_reread_id(dev
, readid_flags
);
3703 /* configure device according to the new ID */
3704 rc
= ata_dev_configure(dev
);
3708 /* verify n_sectors hasn't changed */
3709 if (dev
->class == ATA_DEV_ATA
&& n_sectors
&&
3710 dev
->n_sectors
!= n_sectors
) {
3711 ata_dev_printk(dev
, KERN_INFO
, "n_sectors mismatch "
3713 (unsigned long long)n_sectors
,
3714 (unsigned long long)dev
->n_sectors
);
3716 /* restore original n_sectors */
3717 dev
->n_sectors
= n_sectors
;
3726 ata_dev_printk(dev
, KERN_ERR
, "revalidation failed (errno=%d)\n", rc
);
3730 struct ata_blacklist_entry
{
3731 const char *model_num
;
3732 const char *model_rev
;
3733 unsigned long horkage
;
3736 static const struct ata_blacklist_entry ata_device_blacklist
[] = {
3737 /* Devices with DMA related problems under Linux */
3738 { "WDC AC11000H", NULL
, ATA_HORKAGE_NODMA
},
3739 { "WDC AC22100H", NULL
, ATA_HORKAGE_NODMA
},
3740 { "WDC AC32500H", NULL
, ATA_HORKAGE_NODMA
},
3741 { "WDC AC33100H", NULL
, ATA_HORKAGE_NODMA
},
3742 { "WDC AC31600H", NULL
, ATA_HORKAGE_NODMA
},
3743 { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA
},
3744 { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA
},
3745 { "Compaq CRD-8241B", NULL
, ATA_HORKAGE_NODMA
},
3746 { "CRD-8400B", NULL
, ATA_HORKAGE_NODMA
},
3747 { "CRD-8480B", NULL
, ATA_HORKAGE_NODMA
},
3748 { "CRD-8482B", NULL
, ATA_HORKAGE_NODMA
},
3749 { "CRD-84", NULL
, ATA_HORKAGE_NODMA
},
3750 { "SanDisk SDP3B", NULL
, ATA_HORKAGE_NODMA
},
3751 { "SanDisk SDP3B-64", NULL
, ATA_HORKAGE_NODMA
},
3752 { "SANYO CD-ROM CRD", NULL
, ATA_HORKAGE_NODMA
},
3753 { "HITACHI CDR-8", NULL
, ATA_HORKAGE_NODMA
},
3754 { "HITACHI CDR-8335", NULL
, ATA_HORKAGE_NODMA
},
3755 { "HITACHI CDR-8435", NULL
, ATA_HORKAGE_NODMA
},
3756 { "Toshiba CD-ROM XM-6202B", NULL
, ATA_HORKAGE_NODMA
},
3757 { "TOSHIBA CD-ROM XM-1702BC", NULL
, ATA_HORKAGE_NODMA
},
3758 { "CD-532E-A", NULL
, ATA_HORKAGE_NODMA
},
3759 { "E-IDE CD-ROM CR-840",NULL
, ATA_HORKAGE_NODMA
},
3760 { "CD-ROM Drive/F5A", NULL
, ATA_HORKAGE_NODMA
},
3761 { "WPI CDD-820", NULL
, ATA_HORKAGE_NODMA
},
3762 { "SAMSUNG CD-ROM SC-148C", NULL
, ATA_HORKAGE_NODMA
},
3763 { "SAMSUNG CD-ROM SC", NULL
, ATA_HORKAGE_NODMA
},
3764 { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL
,ATA_HORKAGE_NODMA
},
3765 { "_NEC DV5800A", NULL
, ATA_HORKAGE_NODMA
},
3766 { "SAMSUNG CD-ROM SN-124", "N001", ATA_HORKAGE_NODMA
},
3767 { "Seagate STT20000A", NULL
, ATA_HORKAGE_NODMA
},
3768 /* Odd clown on sil3726/4726 PMPs */
3769 { "Config Disk", NULL
, ATA_HORKAGE_NODMA
|
3770 ATA_HORKAGE_SKIP_PM
},
3772 /* Weird ATAPI devices */
3773 { "TORiSAN DVD-ROM DRD-N216", NULL
, ATA_HORKAGE_MAX_SEC_128
},
3775 /* Devices we expect to fail diagnostics */
3777 /* Devices where NCQ should be avoided */
3779 { "WDC WD740ADFD-00", NULL
, ATA_HORKAGE_NONCQ
},
3780 { "WDC WD740ADFD-00NLR1", NULL
, ATA_HORKAGE_NONCQ
, },
3781 /* http://thread.gmane.org/gmane.linux.ide/14907 */
3782 { "FUJITSU MHT2060BH", NULL
, ATA_HORKAGE_NONCQ
},
3784 { "Maxtor *", "BANC*", ATA_HORKAGE_NONCQ
},
3785 { "Maxtor 7V300F0", "VA111630", ATA_HORKAGE_NONCQ
},
3786 { "ST380817AS", "3.42", ATA_HORKAGE_NONCQ
},
3787 { "ST3160023AS", "3.42", ATA_HORKAGE_NONCQ
},
3789 /* Blacklist entries taken from Silicon Image 3124/3132
3790 Windows driver .inf file - also several Linux problem reports */
3791 { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ
, },
3792 { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ
, },
3793 { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ
, },
3795 /* devices which puke on READ_NATIVE_MAX */
3796 { "HDS724040KLSA80", "KFAOA20N", ATA_HORKAGE_BROKEN_HPA
, },
3797 { "WDC WD3200JD-00KLB0", "WD-WCAMR1130137", ATA_HORKAGE_BROKEN_HPA
},
3798 { "WDC WD2500JD-00HBB0", "WD-WMAL71490727", ATA_HORKAGE_BROKEN_HPA
},
3799 { "MAXTOR 6L080L4", "A93.0500", ATA_HORKAGE_BROKEN_HPA
},
3801 /* Devices which report 1 sector over size HPA */
3802 { "ST340823A", NULL
, ATA_HORKAGE_HPA_SIZE
, },
3803 { "ST320413A", NULL
, ATA_HORKAGE_HPA_SIZE
, },
3804 { "ST310211A", NULL
, ATA_HORKAGE_HPA_SIZE
, },
3806 /* Devices which get the IVB wrong */
3807 { "QUANTUM FIREBALLlct10 05", "A03.0900", ATA_HORKAGE_IVB
, },
3808 { "TSSTcorp CDDVDW SH-S202J", "SB00", ATA_HORKAGE_IVB
, },
3809 { "TSSTcorp CDDVDW SH-S202J", "SB01", ATA_HORKAGE_IVB
, },
3810 { "TSSTcorp CDDVDW SH-S202N", "SB00", ATA_HORKAGE_IVB
, },
3811 { "TSSTcorp CDDVDW SH-S202N", "SB01", ATA_HORKAGE_IVB
, },
3817 static int strn_pattern_cmp(const char *patt
, const char *name
, int wildchar
)
3823 * check for trailing wildcard: *\0
3825 p
= strchr(patt
, wildchar
);
3826 if (p
&& ((*(p
+ 1)) == 0))
3837 return strncmp(patt
, name
, len
);
3840 static unsigned long ata_dev_blacklisted(const struct ata_device
*dev
)
3842 unsigned char model_num
[ATA_ID_PROD_LEN
+ 1];
3843 unsigned char model_rev
[ATA_ID_FW_REV_LEN
+ 1];
3844 const struct ata_blacklist_entry
*ad
= ata_device_blacklist
;
3846 ata_id_c_string(dev
->id
, model_num
, ATA_ID_PROD
, sizeof(model_num
));
3847 ata_id_c_string(dev
->id
, model_rev
, ATA_ID_FW_REV
, sizeof(model_rev
));
3849 while (ad
->model_num
) {
3850 if (!strn_pattern_cmp(ad
->model_num
, model_num
, '*')) {
3851 if (ad
->model_rev
== NULL
)
3853 if (!strn_pattern_cmp(ad
->model_rev
, model_rev
, '*'))
3861 static int ata_dma_blacklisted(const struct ata_device
*dev
)
3863 /* We don't support polling DMA.
3864 * DMA blacklist those ATAPI devices with CDB-intr (and use PIO)
3865 * if the LLDD handles only interrupts in the HSM_ST_LAST state.
3867 if ((dev
->link
->ap
->flags
& ATA_FLAG_PIO_POLLING
) &&
3868 (dev
->flags
& ATA_DFLAG_CDB_INTR
))
3870 return (dev
->horkage
& ATA_HORKAGE_NODMA
) ? 1 : 0;
3874 * ata_is_40wire - check drive side detection
3877 * Perform drive side detection decoding, allowing for device vendors
3878 * who can't follow the documentation.
3881 static int ata_is_40wire(struct ata_device
*dev
)
3883 if (dev
->horkage
& ATA_HORKAGE_IVB
)
3884 return ata_drive_40wire_relaxed(dev
->id
);
3885 return ata_drive_40wire(dev
->id
);
3889 * cable_is_40wire - 40/80/SATA decider
3890 * @ap: port to consider
3892 * This function encapsulates the policy for speed management
3893 * in one place. At the moment we don't cache the result but
3894 * there is a good case for setting ap->cbl to the result when
3895 * we are called with unknown cables (and figuring out if it
3896 * impacts hotplug at all).
3898 * Return 1 if the cable appears to be 40 wire.
3901 static int cable_is_40wire(struct ata_port
*ap
)
3903 struct ata_link
*link
;
3904 struct ata_device
*dev
;
3906 /* If the controller thinks we are 40 wire, we are */
3907 if (ap
->cbl
== ATA_CBL_PATA40
)
3909 /* If the controller thinks we are 80 wire, we are */
3910 if (ap
->cbl
== ATA_CBL_PATA80
|| ap
->cbl
== ATA_CBL_SATA
)
3912 /* If the controller doesn't know we scan
3914 - Note: We look for all 40 wire detects at this point.
3915 Any 80 wire detect is taken to be 80 wire cable
3917 - In many setups only the one drive (slave if present)
3918 will give a valid detect
3919 - If you have a non detect capable drive you don't
3920 want it to colour the choice
3922 ata_port_for_each_link(link
, ap
) {
3923 ata_link_for_each_dev(dev
, link
) {
3924 if (!ata_is_40wire(dev
))
3932 * ata_dev_xfermask - Compute supported xfermask of the given device
3933 * @dev: Device to compute xfermask for
3935 * Compute supported xfermask of @dev and store it in
3936 * dev->*_mask. This function is responsible for applying all
3937 * known limits including host controller limits, device
3943 static void ata_dev_xfermask(struct ata_device
*dev
)
3945 struct ata_link
*link
= dev
->link
;
3946 struct ata_port
*ap
= link
->ap
;
3947 struct ata_host
*host
= ap
->host
;
3948 unsigned long xfer_mask
;
3950 /* controller modes available */
3951 xfer_mask
= ata_pack_xfermask(ap
->pio_mask
,
3952 ap
->mwdma_mask
, ap
->udma_mask
);
3954 /* drive modes available */
3955 xfer_mask
&= ata_pack_xfermask(dev
->pio_mask
,
3956 dev
->mwdma_mask
, dev
->udma_mask
);
3957 xfer_mask
&= ata_id_xfermask(dev
->id
);
3960 * CFA Advanced TrueIDE timings are not allowed on a shared
3963 if (ata_dev_pair(dev
)) {
3964 /* No PIO5 or PIO6 */
3965 xfer_mask
&= ~(0x03 << (ATA_SHIFT_PIO
+ 5));
3966 /* No MWDMA3 or MWDMA 4 */
3967 xfer_mask
&= ~(0x03 << (ATA_SHIFT_MWDMA
+ 3));
3970 if (ata_dma_blacklisted(dev
)) {
3971 xfer_mask
&= ~(ATA_MASK_MWDMA
| ATA_MASK_UDMA
);
3972 ata_dev_printk(dev
, KERN_WARNING
,
3973 "device is on DMA blacklist, disabling DMA\n");
3976 if ((host
->flags
& ATA_HOST_SIMPLEX
) &&
3977 host
->simplex_claimed
&& host
->simplex_claimed
!= ap
) {
3978 xfer_mask
&= ~(ATA_MASK_MWDMA
| ATA_MASK_UDMA
);
3979 ata_dev_printk(dev
, KERN_WARNING
, "simplex DMA is claimed by "
3980 "other device, disabling DMA\n");
3983 if (ap
->flags
& ATA_FLAG_NO_IORDY
)
3984 xfer_mask
&= ata_pio_mask_no_iordy(dev
);
3986 if (ap
->ops
->mode_filter
)
3987 xfer_mask
= ap
->ops
->mode_filter(dev
, xfer_mask
);
3989 /* Apply cable rule here. Don't apply it early because when
3990 * we handle hot plug the cable type can itself change.
3991 * Check this last so that we know if the transfer rate was
3992 * solely limited by the cable.
3993 * Unknown or 80 wire cables reported host side are checked
3994 * drive side as well. Cases where we know a 40wire cable
3995 * is used safely for 80 are not checked here.
3997 if (xfer_mask
& (0xF8 << ATA_SHIFT_UDMA
))
3998 /* UDMA/44 or higher would be available */
3999 if (cable_is_40wire(ap
)) {
4000 ata_dev_printk(dev
, KERN_WARNING
,
4001 "limited to UDMA/33 due to 40-wire cable\n");
4002 xfer_mask
&= ~(0xF8 << ATA_SHIFT_UDMA
);
4005 ata_unpack_xfermask(xfer_mask
, &dev
->pio_mask
,
4006 &dev
->mwdma_mask
, &dev
->udma_mask
);
4010 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
4011 * @dev: Device to which command will be sent
4013 * Issue SET FEATURES - XFER MODE command to device @dev
4017 * PCI/etc. bus probe sem.
4020 * 0 on success, AC_ERR_* mask otherwise.
4023 static unsigned int ata_dev_set_xfermode(struct ata_device
*dev
)
4025 struct ata_taskfile tf
;
4026 unsigned int err_mask
;
4028 /* set up set-features taskfile */
4029 DPRINTK("set features - xfer mode\n");
4031 /* Some controllers and ATAPI devices show flaky interrupt
4032 * behavior after setting xfer mode. Use polling instead.
4034 ata_tf_init(dev
, &tf
);
4035 tf
.command
= ATA_CMD_SET_FEATURES
;
4036 tf
.feature
= SETFEATURES_XFER
;
4037 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
| ATA_TFLAG_POLLING
;
4038 tf
.protocol
= ATA_PROT_NODATA
;
4039 /* If we are using IORDY we must send the mode setting command */
4040 if (ata_pio_need_iordy(dev
))
4041 tf
.nsect
= dev
->xfer_mode
;
4042 /* If the device has IORDY and the controller does not - turn it off */
4043 else if (ata_id_has_iordy(dev
->id
))
4045 else /* In the ancient relic department - skip all of this */
4048 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
4050 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
4054 * ata_dev_set_feature - Issue SET FEATURES - SATA FEATURES
4055 * @dev: Device to which command will be sent
4056 * @enable: Whether to enable or disable the feature
4057 * @feature: The sector count represents the feature to set
4059 * Issue SET FEATURES - SATA FEATURES command to device @dev
4060 * on port @ap with sector count
4063 * PCI/etc. bus probe sem.
4066 * 0 on success, AC_ERR_* mask otherwise.
4068 static unsigned int ata_dev_set_feature(struct ata_device
*dev
, u8 enable
,
4071 struct ata_taskfile tf
;
4072 unsigned int err_mask
;
4074 /* set up set-features taskfile */
4075 DPRINTK("set features - SATA features\n");
4077 ata_tf_init(dev
, &tf
);
4078 tf
.command
= ATA_CMD_SET_FEATURES
;
4079 tf
.feature
= enable
;
4080 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
4081 tf
.protocol
= ATA_PROT_NODATA
;
4084 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
4086 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
4091 * ata_dev_init_params - Issue INIT DEV PARAMS command
4092 * @dev: Device to which command will be sent
4093 * @heads: Number of heads (taskfile parameter)
4094 * @sectors: Number of sectors (taskfile parameter)
4097 * Kernel thread context (may sleep)
4100 * 0 on success, AC_ERR_* mask otherwise.
4102 static unsigned int ata_dev_init_params(struct ata_device
*dev
,
4103 u16 heads
, u16 sectors
)
4105 struct ata_taskfile tf
;
4106 unsigned int err_mask
;
4108 /* Number of sectors per track 1-255. Number of heads 1-16 */
4109 if (sectors
< 1 || sectors
> 255 || heads
< 1 || heads
> 16)
4110 return AC_ERR_INVALID
;
4112 /* set up init dev params taskfile */
4113 DPRINTK("init dev params \n");
4115 ata_tf_init(dev
, &tf
);
4116 tf
.command
= ATA_CMD_INIT_DEV_PARAMS
;
4117 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
4118 tf
.protocol
= ATA_PROT_NODATA
;
4120 tf
.device
|= (heads
- 1) & 0x0f; /* max head = num. of heads - 1 */
4122 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
4123 /* A clean abort indicates an original or just out of spec drive
4124 and we should continue as we issue the setup based on the
4125 drive reported working geometry */
4126 if (err_mask
== AC_ERR_DEV
&& (tf
.feature
& ATA_ABORTED
))
4129 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
4134 * ata_sg_clean - Unmap DMA memory associated with command
4135 * @qc: Command containing DMA memory to be released
4137 * Unmap all mapped DMA memory associated with this command.
4140 * spin_lock_irqsave(host lock)
4142 void ata_sg_clean(struct ata_queued_cmd
*qc
)
4144 struct ata_port
*ap
= qc
->ap
;
4145 struct scatterlist
*sg
= qc
->sg
;
4146 int dir
= qc
->dma_dir
;
4148 WARN_ON(sg
== NULL
);
4150 VPRINTK("unmapping %u sg elements\n", qc
->n_elem
);
4153 dma_unmap_sg(ap
->dev
, sg
, qc
->n_elem
, dir
);
4155 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
4160 * ata_check_atapi_dma - Check whether ATAPI DMA can be supported
4161 * @qc: Metadata associated with taskfile to check
4163 * Allow low-level driver to filter ATA PACKET commands, returning
4164 * a status indicating whether or not it is OK to use DMA for the
4165 * supplied PACKET command.
4168 * spin_lock_irqsave(host lock)
4170 * RETURNS: 0 when ATAPI DMA can be used
4173 int ata_check_atapi_dma(struct ata_queued_cmd
*qc
)
4175 struct ata_port
*ap
= qc
->ap
;
4177 /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a
4178 * few ATAPI devices choke on such DMA requests.
4180 if (unlikely(qc
->nbytes
& 15))
4183 if (ap
->ops
->check_atapi_dma
)
4184 return ap
->ops
->check_atapi_dma(qc
);
4190 * ata_std_qc_defer - Check whether a qc needs to be deferred
4191 * @qc: ATA command in question
4193 * Non-NCQ commands cannot run with any other command, NCQ or
4194 * not. As upper layer only knows the queue depth, we are
4195 * responsible for maintaining exclusion. This function checks
4196 * whether a new command @qc can be issued.
4199 * spin_lock_irqsave(host lock)
4202 * ATA_DEFER_* if deferring is needed, 0 otherwise.
4204 int ata_std_qc_defer(struct ata_queued_cmd
*qc
)
4206 struct ata_link
*link
= qc
->dev
->link
;
4208 if (qc
->tf
.protocol
== ATA_PROT_NCQ
) {
4209 if (!ata_tag_valid(link
->active_tag
))
4212 if (!ata_tag_valid(link
->active_tag
) && !link
->sactive
)
4216 return ATA_DEFER_LINK
;
4219 void ata_noop_qc_prep(struct ata_queued_cmd
*qc
) { }
4222 * ata_sg_init - Associate command with scatter-gather table.
4223 * @qc: Command to be associated
4224 * @sg: Scatter-gather table.
4225 * @n_elem: Number of elements in s/g table.
4227 * Initialize the data-related elements of queued_cmd @qc
4228 * to point to a scatter-gather table @sg, containing @n_elem
4232 * spin_lock_irqsave(host lock)
4234 void ata_sg_init(struct ata_queued_cmd
*qc
, struct scatterlist
*sg
,
4235 unsigned int n_elem
)
4238 qc
->n_elem
= n_elem
;
4243 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
4244 * @qc: Command with scatter-gather table to be mapped.
4246 * DMA-map the scatter-gather table associated with queued_cmd @qc.
4249 * spin_lock_irqsave(host lock)
4252 * Zero on success, negative on error.
4255 static int ata_sg_setup(struct ata_queued_cmd
*qc
)
4257 struct ata_port
*ap
= qc
->ap
;
4258 unsigned int n_elem
;
4260 VPRINTK("ENTER, ata%u\n", ap
->print_id
);
4262 n_elem
= dma_map_sg(ap
->dev
, qc
->sg
, qc
->n_elem
, qc
->dma_dir
);
4266 DPRINTK("%d sg elements mapped\n", n_elem
);
4268 qc
->n_elem
= n_elem
;
4269 qc
->flags
|= ATA_QCFLAG_DMAMAP
;
4275 * swap_buf_le16 - swap halves of 16-bit words in place
4276 * @buf: Buffer to swap
4277 * @buf_words: Number of 16-bit words in buffer.
4279 * Swap halves of 16-bit words if needed to convert from
4280 * little-endian byte order to native cpu byte order, or
4284 * Inherited from caller.
4286 void swap_buf_le16(u16
*buf
, unsigned int buf_words
)
4291 for (i
= 0; i
< buf_words
; i
++)
4292 buf
[i
] = le16_to_cpu(buf
[i
]);
4293 #endif /* __BIG_ENDIAN */
4297 * ata_qc_new - Request an available ATA command, for queueing
4298 * @ap: Port associated with device @dev
4299 * @dev: Device from whom we request an available command structure
4305 static struct ata_queued_cmd
*ata_qc_new(struct ata_port
*ap
)
4307 struct ata_queued_cmd
*qc
= NULL
;
4310 /* no command while frozen */
4311 if (unlikely(ap
->pflags
& ATA_PFLAG_FROZEN
))
4314 /* the last tag is reserved for internal command. */
4315 for (i
= 0; i
< ATA_MAX_QUEUE
- 1; i
++)
4316 if (!test_and_set_bit(i
, &ap
->qc_allocated
)) {
4317 qc
= __ata_qc_from_tag(ap
, i
);
4328 * ata_qc_new_init - Request an available ATA command, and initialize it
4329 * @dev: Device from whom we request an available command structure
4335 struct ata_queued_cmd
*ata_qc_new_init(struct ata_device
*dev
)
4337 struct ata_port
*ap
= dev
->link
->ap
;
4338 struct ata_queued_cmd
*qc
;
4340 qc
= ata_qc_new(ap
);
4353 * ata_qc_free - free unused ata_queued_cmd
4354 * @qc: Command to complete
4356 * Designed to free unused ata_queued_cmd object
4357 * in case something prevents using it.
4360 * spin_lock_irqsave(host lock)
4362 void ata_qc_free(struct ata_queued_cmd
*qc
)
4364 struct ata_port
*ap
= qc
->ap
;
4367 WARN_ON(qc
== NULL
); /* ata_qc_from_tag _might_ return NULL */
4371 if (likely(ata_tag_valid(tag
))) {
4372 qc
->tag
= ATA_TAG_POISON
;
4373 clear_bit(tag
, &ap
->qc_allocated
);
4377 void __ata_qc_complete(struct ata_queued_cmd
*qc
)
4379 struct ata_port
*ap
= qc
->ap
;
4380 struct ata_link
*link
= qc
->dev
->link
;
4382 WARN_ON(qc
== NULL
); /* ata_qc_from_tag _might_ return NULL */
4383 WARN_ON(!(qc
->flags
& ATA_QCFLAG_ACTIVE
));
4385 if (likely(qc
->flags
& ATA_QCFLAG_DMAMAP
))
4388 /* command should be marked inactive atomically with qc completion */
4389 if (qc
->tf
.protocol
== ATA_PROT_NCQ
) {
4390 link
->sactive
&= ~(1 << qc
->tag
);
4392 ap
->nr_active_links
--;
4394 link
->active_tag
= ATA_TAG_POISON
;
4395 ap
->nr_active_links
--;
4398 /* clear exclusive status */
4399 if (unlikely(qc
->flags
& ATA_QCFLAG_CLEAR_EXCL
&&
4400 ap
->excl_link
== link
))
4401 ap
->excl_link
= NULL
;
4403 /* atapi: mark qc as inactive to prevent the interrupt handler
4404 * from completing the command twice later, before the error handler
4405 * is called. (when rc != 0 and atapi request sense is needed)
4407 qc
->flags
&= ~ATA_QCFLAG_ACTIVE
;
4408 ap
->qc_active
&= ~(1 << qc
->tag
);
4410 /* call completion callback */
4411 qc
->complete_fn(qc
);
4414 static void fill_result_tf(struct ata_queued_cmd
*qc
)
4416 struct ata_port
*ap
= qc
->ap
;
4418 qc
->result_tf
.flags
= qc
->tf
.flags
;
4419 ap
->ops
->tf_read(ap
, &qc
->result_tf
);
4422 static void ata_verify_xfer(struct ata_queued_cmd
*qc
)
4424 struct ata_device
*dev
= qc
->dev
;
4426 if (ata_tag_internal(qc
->tag
))
4429 if (ata_is_nodata(qc
->tf
.protocol
))
4432 if ((dev
->mwdma_mask
|| dev
->udma_mask
) && ata_is_pio(qc
->tf
.protocol
))
4435 dev
->flags
&= ~ATA_DFLAG_DUBIOUS_XFER
;
4439 * ata_qc_complete - Complete an active ATA command
4440 * @qc: Command to complete
4441 * @err_mask: ATA Status register contents
4443 * Indicate to the mid and upper layers that an ATA
4444 * command has completed, with either an ok or not-ok status.
4447 * spin_lock_irqsave(host lock)
4449 void ata_qc_complete(struct ata_queued_cmd
*qc
)
4451 struct ata_port
*ap
= qc
->ap
;
4453 /* XXX: New EH and old EH use different mechanisms to
4454 * synchronize EH with regular execution path.
4456 * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED.
4457 * Normal execution path is responsible for not accessing a
4458 * failed qc. libata core enforces the rule by returning NULL
4459 * from ata_qc_from_tag() for failed qcs.
4461 * Old EH depends on ata_qc_complete() nullifying completion
4462 * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does
4463 * not synchronize with interrupt handler. Only PIO task is
4466 if (ap
->ops
->error_handler
) {
4467 struct ata_device
*dev
= qc
->dev
;
4468 struct ata_eh_info
*ehi
= &dev
->link
->eh_info
;
4470 WARN_ON(ap
->pflags
& ATA_PFLAG_FROZEN
);
4472 if (unlikely(qc
->err_mask
))
4473 qc
->flags
|= ATA_QCFLAG_FAILED
;
4475 if (unlikely(qc
->flags
& ATA_QCFLAG_FAILED
)) {
4476 if (!ata_tag_internal(qc
->tag
)) {
4477 /* always fill result TF for failed qc */
4479 ata_qc_schedule_eh(qc
);
4484 /* read result TF if requested */
4485 if (qc
->flags
& ATA_QCFLAG_RESULT_TF
)
4488 /* Some commands need post-processing after successful
4491 switch (qc
->tf
.command
) {
4492 case ATA_CMD_SET_FEATURES
:
4493 if (qc
->tf
.feature
!= SETFEATURES_WC_ON
&&
4494 qc
->tf
.feature
!= SETFEATURES_WC_OFF
)
4497 case ATA_CMD_INIT_DEV_PARAMS
: /* CHS translation changed */
4498 case ATA_CMD_SET_MULTI
: /* multi_count changed */
4499 /* revalidate device */
4500 ehi
->dev_action
[dev
->devno
] |= ATA_EH_REVALIDATE
;
4501 ata_port_schedule_eh(ap
);
4505 dev
->flags
|= ATA_DFLAG_SLEEPING
;
4509 if (unlikely(dev
->flags
& ATA_DFLAG_DUBIOUS_XFER
))
4510 ata_verify_xfer(qc
);
4512 __ata_qc_complete(qc
);
4514 if (qc
->flags
& ATA_QCFLAG_EH_SCHEDULED
)
4517 /* read result TF if failed or requested */
4518 if (qc
->err_mask
|| qc
->flags
& ATA_QCFLAG_RESULT_TF
)
4521 __ata_qc_complete(qc
);
4526 * ata_qc_complete_multiple - Complete multiple qcs successfully
4527 * @ap: port in question
4528 * @qc_active: new qc_active mask
4529 * @finish_qc: LLDD callback invoked before completing a qc
4531 * Complete in-flight commands. This functions is meant to be
4532 * called from low-level driver's interrupt routine to complete
4533 * requests normally. ap->qc_active and @qc_active is compared
4534 * and commands are completed accordingly.
4537 * spin_lock_irqsave(host lock)
4540 * Number of completed commands on success, -errno otherwise.
4542 int ata_qc_complete_multiple(struct ata_port
*ap
, u32 qc_active
,
4543 void (*finish_qc
)(struct ata_queued_cmd
*))
4549 done_mask
= ap
->qc_active
^ qc_active
;
4551 if (unlikely(done_mask
& qc_active
)) {
4552 ata_port_printk(ap
, KERN_ERR
, "illegal qc_active transition "
4553 "(%08x->%08x)\n", ap
->qc_active
, qc_active
);
4557 for (i
= 0; i
< ATA_MAX_QUEUE
; i
++) {
4558 struct ata_queued_cmd
*qc
;
4560 if (!(done_mask
& (1 << i
)))
4563 if ((qc
= ata_qc_from_tag(ap
, i
))) {
4566 ata_qc_complete(qc
);
4575 * ata_qc_issue - issue taskfile to device
4576 * @qc: command to issue to device
4578 * Prepare an ATA command to submission to device.
4579 * This includes mapping the data into a DMA-able
4580 * area, filling in the S/G table, and finally
4581 * writing the taskfile to hardware, starting the command.
4584 * spin_lock_irqsave(host lock)
4586 void ata_qc_issue(struct ata_queued_cmd
*qc
)
4588 struct ata_port
*ap
= qc
->ap
;
4589 struct ata_link
*link
= qc
->dev
->link
;
4590 u8 prot
= qc
->tf
.protocol
;
4592 /* Make sure only one non-NCQ command is outstanding. The
4593 * check is skipped for old EH because it reuses active qc to
4594 * request ATAPI sense.
4596 WARN_ON(ap
->ops
->error_handler
&& ata_tag_valid(link
->active_tag
));
4598 if (ata_is_ncq(prot
)) {
4599 WARN_ON(link
->sactive
& (1 << qc
->tag
));
4602 ap
->nr_active_links
++;
4603 link
->sactive
|= 1 << qc
->tag
;
4605 WARN_ON(link
->sactive
);
4607 ap
->nr_active_links
++;
4608 link
->active_tag
= qc
->tag
;
4611 qc
->flags
|= ATA_QCFLAG_ACTIVE
;
4612 ap
->qc_active
|= 1 << qc
->tag
;
4614 /* We guarantee to LLDs that they will have at least one
4615 * non-zero sg if the command is a data command.
4617 BUG_ON(ata_is_data(prot
) && (!qc
->sg
|| !qc
->n_elem
|| !qc
->nbytes
));
4619 if (ata_is_dma(prot
) || (ata_is_pio(prot
) &&
4620 (ap
->flags
& ATA_FLAG_PIO_DMA
)))
4621 if (ata_sg_setup(qc
))
4624 /* if device is sleeping, schedule reset and abort the link */
4625 if (unlikely(qc
->dev
->flags
& ATA_DFLAG_SLEEPING
)) {
4626 link
->eh_info
.action
|= ATA_EH_RESET
;
4627 ata_ehi_push_desc(&link
->eh_info
, "waking up from sleep");
4628 ata_link_abort(link
);
4632 ap
->ops
->qc_prep(qc
);
4634 qc
->err_mask
|= ap
->ops
->qc_issue(qc
);
4635 if (unlikely(qc
->err_mask
))
4640 qc
->err_mask
|= AC_ERR_SYSTEM
;
4642 ata_qc_complete(qc
);
4646 * sata_scr_valid - test whether SCRs are accessible
4647 * @link: ATA link to test SCR accessibility for
4649 * Test whether SCRs are accessible for @link.
4655 * 1 if SCRs are accessible, 0 otherwise.
4657 int sata_scr_valid(struct ata_link
*link
)
4659 struct ata_port
*ap
= link
->ap
;
4661 return (ap
->flags
& ATA_FLAG_SATA
) && ap
->ops
->scr_read
;
4665 * sata_scr_read - read SCR register of the specified port
4666 * @link: ATA link to read SCR for
4668 * @val: Place to store read value
4670 * Read SCR register @reg of @link into *@val. This function is
4671 * guaranteed to succeed if @link is ap->link, the cable type of
4672 * the port is SATA and the port implements ->scr_read.
4675 * None if @link is ap->link. Kernel thread context otherwise.
4678 * 0 on success, negative errno on failure.
4680 int sata_scr_read(struct ata_link
*link
, int reg
, u32
*val
)
4682 if (ata_is_host_link(link
)) {
4683 struct ata_port
*ap
= link
->ap
;
4685 if (sata_scr_valid(link
))
4686 return ap
->ops
->scr_read(ap
, reg
, val
);
4690 return sata_pmp_scr_read(link
, reg
, val
);
4694 * sata_scr_write - write SCR register of the specified port
4695 * @link: ATA link to write SCR for
4696 * @reg: SCR to write
4697 * @val: value to write
4699 * Write @val to SCR register @reg of @link. This function is
4700 * guaranteed to succeed if @link is ap->link, the cable type of
4701 * the port is SATA and the port implements ->scr_read.
4704 * None if @link is ap->link. Kernel thread context otherwise.
4707 * 0 on success, negative errno on failure.
4709 int sata_scr_write(struct ata_link
*link
, int reg
, u32 val
)
4711 if (ata_is_host_link(link
)) {
4712 struct ata_port
*ap
= link
->ap
;
4714 if (sata_scr_valid(link
))
4715 return ap
->ops
->scr_write(ap
, reg
, val
);
4719 return sata_pmp_scr_write(link
, reg
, val
);
4723 * sata_scr_write_flush - write SCR register of the specified port and flush
4724 * @link: ATA link to write SCR for
4725 * @reg: SCR to write
4726 * @val: value to write
4728 * This function is identical to sata_scr_write() except that this
4729 * function performs flush after writing to the register.
4732 * None if @link is ap->link. Kernel thread context otherwise.
4735 * 0 on success, negative errno on failure.
4737 int sata_scr_write_flush(struct ata_link
*link
, int reg
, u32 val
)
4739 if (ata_is_host_link(link
)) {
4740 struct ata_port
*ap
= link
->ap
;
4743 if (sata_scr_valid(link
)) {
4744 rc
= ap
->ops
->scr_write(ap
, reg
, val
);
4746 rc
= ap
->ops
->scr_read(ap
, reg
, &val
);
4752 return sata_pmp_scr_write(link
, reg
, val
);
4756 * ata_link_online - test whether the given link is online
4757 * @link: ATA link to test
4759 * Test whether @link is online. Note that this function returns
4760 * 0 if online status of @link cannot be obtained, so
4761 * ata_link_online(link) != !ata_link_offline(link).
4767 * 1 if the port online status is available and online.
4769 int ata_link_online(struct ata_link
*link
)
4773 if (sata_scr_read(link
, SCR_STATUS
, &sstatus
) == 0 &&
4774 (sstatus
& 0xf) == 0x3)
4780 * ata_link_offline - test whether the given link is offline
4781 * @link: ATA link to test
4783 * Test whether @link is offline. Note that this function
4784 * returns 0 if offline status of @link cannot be obtained, so
4785 * ata_link_online(link) != !ata_link_offline(link).
4791 * 1 if the port offline status is available and offline.
4793 int ata_link_offline(struct ata_link
*link
)
4797 if (sata_scr_read(link
, SCR_STATUS
, &sstatus
) == 0 &&
4798 (sstatus
& 0xf) != 0x3)
4804 static int ata_host_request_pm(struct ata_host
*host
, pm_message_t mesg
,
4805 unsigned int action
, unsigned int ehi_flags
,
4808 unsigned long flags
;
4811 for (i
= 0; i
< host
->n_ports
; i
++) {
4812 struct ata_port
*ap
= host
->ports
[i
];
4813 struct ata_link
*link
;
4815 /* Previous resume operation might still be in
4816 * progress. Wait for PM_PENDING to clear.
4818 if (ap
->pflags
& ATA_PFLAG_PM_PENDING
) {
4819 ata_port_wait_eh(ap
);
4820 WARN_ON(ap
->pflags
& ATA_PFLAG_PM_PENDING
);
4823 /* request PM ops to EH */
4824 spin_lock_irqsave(ap
->lock
, flags
);
4829 ap
->pm_result
= &rc
;
4832 ap
->pflags
|= ATA_PFLAG_PM_PENDING
;
4833 __ata_port_for_each_link(link
, ap
) {
4834 link
->eh_info
.action
|= action
;
4835 link
->eh_info
.flags
|= ehi_flags
;
4838 ata_port_schedule_eh(ap
);
4840 spin_unlock_irqrestore(ap
->lock
, flags
);
4842 /* wait and check result */
4844 ata_port_wait_eh(ap
);
4845 WARN_ON(ap
->pflags
& ATA_PFLAG_PM_PENDING
);
4855 * ata_host_suspend - suspend host
4856 * @host: host to suspend
4859 * Suspend @host. Actual operation is performed by EH. This
4860 * function requests EH to perform PM operations and waits for EH
4864 * Kernel thread context (may sleep).
4867 * 0 on success, -errno on failure.
4869 int ata_host_suspend(struct ata_host
*host
, pm_message_t mesg
)
4874 * disable link pm on all ports before requesting
4877 ata_lpm_enable(host
);
4879 rc
= ata_host_request_pm(host
, mesg
, 0, ATA_EHI_QUIET
, 1);
4881 host
->dev
->power
.power_state
= mesg
;
4886 * ata_host_resume - resume host
4887 * @host: host to resume
4889 * Resume @host. Actual operation is performed by EH. This
4890 * function requests EH to perform PM operations and returns.
4891 * Note that all resume operations are performed parallely.
4894 * Kernel thread context (may sleep).
4896 void ata_host_resume(struct ata_host
*host
)
4898 ata_host_request_pm(host
, PMSG_ON
, ATA_EH_RESET
,
4899 ATA_EHI_NO_AUTOPSY
| ATA_EHI_QUIET
, 0);
4900 host
->dev
->power
.power_state
= PMSG_ON
;
4902 /* reenable link pm */
4903 ata_lpm_disable(host
);
4908 * ata_port_start - Set port up for dma.
4909 * @ap: Port to initialize
4911 * Called just after data structures for each port are
4912 * initialized. Allocates space for PRD table.
4914 * May be used as the port_start() entry in ata_port_operations.
4917 * Inherited from caller.
4919 int ata_port_start(struct ata_port
*ap
)
4921 struct device
*dev
= ap
->dev
;
4923 ap
->prd
= dmam_alloc_coherent(dev
, ATA_PRD_TBL_SZ
, &ap
->prd_dma
,
4932 * ata_dev_init - Initialize an ata_device structure
4933 * @dev: Device structure to initialize
4935 * Initialize @dev in preparation for probing.
4938 * Inherited from caller.
4940 void ata_dev_init(struct ata_device
*dev
)
4942 struct ata_link
*link
= dev
->link
;
4943 struct ata_port
*ap
= link
->ap
;
4944 unsigned long flags
;
4946 /* SATA spd limit is bound to the first device */
4947 link
->sata_spd_limit
= link
->hw_sata_spd_limit
;
4950 /* High bits of dev->flags are used to record warm plug
4951 * requests which occur asynchronously. Synchronize using
4954 spin_lock_irqsave(ap
->lock
, flags
);
4955 dev
->flags
&= ~ATA_DFLAG_INIT_MASK
;
4957 spin_unlock_irqrestore(ap
->lock
, flags
);
4959 memset((void *)dev
+ ATA_DEVICE_CLEAR_OFFSET
, 0,
4960 sizeof(*dev
) - ATA_DEVICE_CLEAR_OFFSET
);
4961 dev
->pio_mask
= UINT_MAX
;
4962 dev
->mwdma_mask
= UINT_MAX
;
4963 dev
->udma_mask
= UINT_MAX
;
4967 * ata_link_init - Initialize an ata_link structure
4968 * @ap: ATA port link is attached to
4969 * @link: Link structure to initialize
4970 * @pmp: Port multiplier port number
4975 * Kernel thread context (may sleep)
4977 void ata_link_init(struct ata_port
*ap
, struct ata_link
*link
, int pmp
)
4981 /* clear everything except for devices */
4982 memset(link
, 0, offsetof(struct ata_link
, device
[0]));
4986 link
->active_tag
= ATA_TAG_POISON
;
4987 link
->hw_sata_spd_limit
= UINT_MAX
;
4989 /* can't use iterator, ap isn't initialized yet */
4990 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
4991 struct ata_device
*dev
= &link
->device
[i
];
4994 dev
->devno
= dev
- link
->device
;
5000 * sata_link_init_spd - Initialize link->sata_spd_limit
5001 * @link: Link to configure sata_spd_limit for
5003 * Initialize @link->[hw_]sata_spd_limit to the currently
5007 * Kernel thread context (may sleep).
5010 * 0 on success, -errno on failure.
5012 int sata_link_init_spd(struct ata_link
*link
)
5018 rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
);
5022 spd
= (scontrol
>> 4) & 0xf;
5024 link
->hw_sata_spd_limit
&= (1 << spd
) - 1;
5026 ata_force_spd_limit(link
);
5028 link
->sata_spd_limit
= link
->hw_sata_spd_limit
;
5034 * ata_port_alloc - allocate and initialize basic ATA port resources
5035 * @host: ATA host this allocated port belongs to
5037 * Allocate and initialize basic ATA port resources.
5040 * Allocate ATA port on success, NULL on failure.
5043 * Inherited from calling layer (may sleep).
5045 struct ata_port
*ata_port_alloc(struct ata_host
*host
)
5047 struct ata_port
*ap
;
5051 ap
= kzalloc(sizeof(*ap
), GFP_KERNEL
);
5055 ap
->pflags
|= ATA_PFLAG_INITIALIZING
;
5056 ap
->lock
= &host
->lock
;
5057 ap
->flags
= ATA_FLAG_DISABLED
;
5059 ap
->ctl
= ATA_DEVCTL_OBS
;
5061 ap
->dev
= host
->dev
;
5062 ap
->last_ctl
= 0xFF;
5064 #if defined(ATA_VERBOSE_DEBUG)
5065 /* turn on all debugging levels */
5066 ap
->msg_enable
= 0x00FF;
5067 #elif defined(ATA_DEBUG)
5068 ap
->msg_enable
= ATA_MSG_DRV
| ATA_MSG_INFO
| ATA_MSG_CTL
| ATA_MSG_WARN
| ATA_MSG_ERR
;
5070 ap
->msg_enable
= ATA_MSG_DRV
| ATA_MSG_ERR
| ATA_MSG_WARN
;
5073 INIT_DELAYED_WORK(&ap
->port_task
, ata_pio_task
);
5074 INIT_DELAYED_WORK(&ap
->hotplug_task
, ata_scsi_hotplug
);
5075 INIT_WORK(&ap
->scsi_rescan_task
, ata_scsi_dev_rescan
);
5076 INIT_LIST_HEAD(&ap
->eh_done_q
);
5077 init_waitqueue_head(&ap
->eh_wait_q
);
5078 init_timer_deferrable(&ap
->fastdrain_timer
);
5079 ap
->fastdrain_timer
.function
= ata_eh_fastdrain_timerfn
;
5080 ap
->fastdrain_timer
.data
= (unsigned long)ap
;
5082 ap
->cbl
= ATA_CBL_NONE
;
5084 ata_link_init(ap
, &ap
->link
, 0);
5087 ap
->stats
.unhandled_irq
= 1;
5088 ap
->stats
.idle_irq
= 1;
5093 static void ata_host_release(struct device
*gendev
, void *res
)
5095 struct ata_host
*host
= dev_get_drvdata(gendev
);
5098 for (i
= 0; i
< host
->n_ports
; i
++) {
5099 struct ata_port
*ap
= host
->ports
[i
];
5105 scsi_host_put(ap
->scsi_host
);
5107 kfree(ap
->pmp_link
);
5109 host
->ports
[i
] = NULL
;
5112 dev_set_drvdata(gendev
, NULL
);
5116 * ata_host_alloc - allocate and init basic ATA host resources
5117 * @dev: generic device this host is associated with
5118 * @max_ports: maximum number of ATA ports associated with this host
5120 * Allocate and initialize basic ATA host resources. LLD calls
5121 * this function to allocate a host, initializes it fully and
5122 * attaches it using ata_host_register().
5124 * @max_ports ports are allocated and host->n_ports is
5125 * initialized to @max_ports. The caller is allowed to decrease
5126 * host->n_ports before calling ata_host_register(). The unused
5127 * ports will be automatically freed on registration.
5130 * Allocate ATA host on success, NULL on failure.
5133 * Inherited from calling layer (may sleep).
5135 struct ata_host
*ata_host_alloc(struct device
*dev
, int max_ports
)
5137 struct ata_host
*host
;
5143 if (!devres_open_group(dev
, NULL
, GFP_KERNEL
))
5146 /* alloc a container for our list of ATA ports (buses) */
5147 sz
= sizeof(struct ata_host
) + (max_ports
+ 1) * sizeof(void *);
5148 /* alloc a container for our list of ATA ports (buses) */
5149 host
= devres_alloc(ata_host_release
, sz
, GFP_KERNEL
);
5153 devres_add(dev
, host
);
5154 dev_set_drvdata(dev
, host
);
5156 spin_lock_init(&host
->lock
);
5158 host
->n_ports
= max_ports
;
5160 /* allocate ports bound to this host */
5161 for (i
= 0; i
< max_ports
; i
++) {
5162 struct ata_port
*ap
;
5164 ap
= ata_port_alloc(host
);
5169 host
->ports
[i
] = ap
;
5172 devres_remove_group(dev
, NULL
);
5176 devres_release_group(dev
, NULL
);
5181 * ata_host_alloc_pinfo - alloc host and init with port_info array
5182 * @dev: generic device this host is associated with
5183 * @ppi: array of ATA port_info to initialize host with
5184 * @n_ports: number of ATA ports attached to this host
5186 * Allocate ATA host and initialize with info from @ppi. If NULL
5187 * terminated, @ppi may contain fewer entries than @n_ports. The
5188 * last entry will be used for the remaining ports.
5191 * Allocate ATA host on success, NULL on failure.
5194 * Inherited from calling layer (may sleep).
5196 struct ata_host
*ata_host_alloc_pinfo(struct device
*dev
,
5197 const struct ata_port_info
* const * ppi
,
5200 const struct ata_port_info
*pi
;
5201 struct ata_host
*host
;
5204 host
= ata_host_alloc(dev
, n_ports
);
5208 for (i
= 0, j
= 0, pi
= NULL
; i
< host
->n_ports
; i
++) {
5209 struct ata_port
*ap
= host
->ports
[i
];
5214 ap
->pio_mask
= pi
->pio_mask
;
5215 ap
->mwdma_mask
= pi
->mwdma_mask
;
5216 ap
->udma_mask
= pi
->udma_mask
;
5217 ap
->flags
|= pi
->flags
;
5218 ap
->link
.flags
|= pi
->link_flags
;
5219 ap
->ops
= pi
->port_ops
;
5221 if (!host
->ops
&& (pi
->port_ops
!= &ata_dummy_port_ops
))
5222 host
->ops
= pi
->port_ops
;
5228 static void ata_host_stop(struct device
*gendev
, void *res
)
5230 struct ata_host
*host
= dev_get_drvdata(gendev
);
5233 WARN_ON(!(host
->flags
& ATA_HOST_STARTED
));
5235 for (i
= 0; i
< host
->n_ports
; i
++) {
5236 struct ata_port
*ap
= host
->ports
[i
];
5238 if (ap
->ops
->port_stop
)
5239 ap
->ops
->port_stop(ap
);
5242 if (host
->ops
->host_stop
)
5243 host
->ops
->host_stop(host
);
5247 * ata_finalize_port_ops - finalize ata_port_operations
5248 * @ops: ata_port_operations to finalize
5250 * An ata_port_operations can inherit from another ops and that
5251 * ops can again inherit from another. This can go on as many
5252 * times as necessary as long as there is no loop in the
5253 * inheritance chain.
5255 * Ops tables are finalized when the host is started. NULL or
5256 * unspecified entries are inherited from the closet ancestor
5257 * which has the method and the entry is populated with it.
5258 * After finalization, the ops table directly points to all the
5259 * methods and ->inherits is no longer necessary and cleared.
5261 * Using ATA_OP_NULL, inheriting ops can force a method to NULL.
5266 static void ata_finalize_port_ops(struct ata_port_operations
*ops
)
5268 static spinlock_t lock
= SPIN_LOCK_UNLOCKED
;
5269 const struct ata_port_operations
*cur
;
5270 void **begin
= (void **)ops
;
5271 void **end
= (void **)&ops
->inherits
;
5274 if (!ops
|| !ops
->inherits
)
5279 for (cur
= ops
->inherits
; cur
; cur
= cur
->inherits
) {
5280 void **inherit
= (void **)cur
;
5282 for (pp
= begin
; pp
< end
; pp
++, inherit
++)
5287 for (pp
= begin
; pp
< end
; pp
++)
5291 ops
->inherits
= NULL
;
5297 * ata_host_start - start and freeze ports of an ATA host
5298 * @host: ATA host to start ports for
5300 * Start and then freeze ports of @host. Started status is
5301 * recorded in host->flags, so this function can be called
5302 * multiple times. Ports are guaranteed to get started only
5303 * once. If host->ops isn't initialized yet, its set to the
5304 * first non-dummy port ops.
5307 * Inherited from calling layer (may sleep).
5310 * 0 if all ports are started successfully, -errno otherwise.
5312 int ata_host_start(struct ata_host
*host
)
5315 void *start_dr
= NULL
;
5318 if (host
->flags
& ATA_HOST_STARTED
)
5321 ata_finalize_port_ops(host
->ops
);
5323 for (i
= 0; i
< host
->n_ports
; i
++) {
5324 struct ata_port
*ap
= host
->ports
[i
];
5326 ata_finalize_port_ops(ap
->ops
);
5328 if (!host
->ops
&& !ata_port_is_dummy(ap
))
5329 host
->ops
= ap
->ops
;
5331 if (ap
->ops
->port_stop
)
5335 if (host
->ops
->host_stop
)
5339 start_dr
= devres_alloc(ata_host_stop
, 0, GFP_KERNEL
);
5344 for (i
= 0; i
< host
->n_ports
; i
++) {
5345 struct ata_port
*ap
= host
->ports
[i
];
5347 if (ap
->ops
->port_start
) {
5348 rc
= ap
->ops
->port_start(ap
);
5351 dev_printk(KERN_ERR
, host
->dev
,
5352 "failed to start port %d "
5353 "(errno=%d)\n", i
, rc
);
5357 ata_eh_freeze_port(ap
);
5361 devres_add(host
->dev
, start_dr
);
5362 host
->flags
|= ATA_HOST_STARTED
;
5367 struct ata_port
*ap
= host
->ports
[i
];
5369 if (ap
->ops
->port_stop
)
5370 ap
->ops
->port_stop(ap
);
5372 devres_free(start_dr
);
5377 * ata_sas_host_init - Initialize a host struct
5378 * @host: host to initialize
5379 * @dev: device host is attached to
5380 * @flags: host flags
5384 * PCI/etc. bus probe sem.
5387 /* KILLME - the only user left is ipr */
5388 void ata_host_init(struct ata_host
*host
, struct device
*dev
,
5389 unsigned long flags
, struct ata_port_operations
*ops
)
5391 spin_lock_init(&host
->lock
);
5393 host
->flags
= flags
;
5398 * ata_host_register - register initialized ATA host
5399 * @host: ATA host to register
5400 * @sht: template for SCSI host
5402 * Register initialized ATA host. @host is allocated using
5403 * ata_host_alloc() and fully initialized by LLD. This function
5404 * starts ports, registers @host with ATA and SCSI layers and
5405 * probe registered devices.
5408 * Inherited from calling layer (may sleep).
5411 * 0 on success, -errno otherwise.
5413 int ata_host_register(struct ata_host
*host
, struct scsi_host_template
*sht
)
5417 /* host must have been started */
5418 if (!(host
->flags
& ATA_HOST_STARTED
)) {
5419 dev_printk(KERN_ERR
, host
->dev
,
5420 "BUG: trying to register unstarted host\n");
5425 /* Blow away unused ports. This happens when LLD can't
5426 * determine the exact number of ports to allocate at
5429 for (i
= host
->n_ports
; host
->ports
[i
]; i
++)
5430 kfree(host
->ports
[i
]);
5432 /* give ports names and add SCSI hosts */
5433 for (i
= 0; i
< host
->n_ports
; i
++)
5434 host
->ports
[i
]->print_id
= ata_print_id
++;
5436 rc
= ata_scsi_add_hosts(host
, sht
);
5440 /* associate with ACPI nodes */
5441 ata_acpi_associate(host
);
5443 /* set cable, sata_spd_limit and report */
5444 for (i
= 0; i
< host
->n_ports
; i
++) {
5445 struct ata_port
*ap
= host
->ports
[i
];
5446 unsigned long xfer_mask
;
5448 /* set SATA cable type if still unset */
5449 if (ap
->cbl
== ATA_CBL_NONE
&& (ap
->flags
& ATA_FLAG_SATA
))
5450 ap
->cbl
= ATA_CBL_SATA
;
5452 /* init sata_spd_limit to the current value */
5453 sata_link_init_spd(&ap
->link
);
5455 /* print per-port info to dmesg */
5456 xfer_mask
= ata_pack_xfermask(ap
->pio_mask
, ap
->mwdma_mask
,
5459 if (!ata_port_is_dummy(ap
)) {
5460 ata_port_printk(ap
, KERN_INFO
,
5461 "%cATA max %s %s\n",
5462 (ap
->flags
& ATA_FLAG_SATA
) ? 'S' : 'P',
5463 ata_mode_string(xfer_mask
),
5464 ap
->link
.eh_info
.desc
);
5465 ata_ehi_clear_desc(&ap
->link
.eh_info
);
5467 ata_port_printk(ap
, KERN_INFO
, "DUMMY\n");
5470 /* perform each probe synchronously */
5471 DPRINTK("probe begin\n");
5472 for (i
= 0; i
< host
->n_ports
; i
++) {
5473 struct ata_port
*ap
= host
->ports
[i
];
5476 if (ap
->ops
->error_handler
) {
5477 struct ata_eh_info
*ehi
= &ap
->link
.eh_info
;
5478 unsigned long flags
;
5482 /* kick EH for boot probing */
5483 spin_lock_irqsave(ap
->lock
, flags
);
5485 ehi
->probe_mask
|= ATA_ALL_DEVICES
;
5486 ehi
->action
|= ATA_EH_RESET
;
5487 ehi
->flags
|= ATA_EHI_NO_AUTOPSY
| ATA_EHI_QUIET
;
5489 ap
->pflags
&= ~ATA_PFLAG_INITIALIZING
;
5490 ap
->pflags
|= ATA_PFLAG_LOADING
;
5491 ata_port_schedule_eh(ap
);
5493 spin_unlock_irqrestore(ap
->lock
, flags
);
5495 /* wait for EH to finish */
5496 ata_port_wait_eh(ap
);
5498 DPRINTK("ata%u: bus probe begin\n", ap
->print_id
);
5499 rc
= ata_bus_probe(ap
);
5500 DPRINTK("ata%u: bus probe end\n", ap
->print_id
);
5503 /* FIXME: do something useful here?
5504 * Current libata behavior will
5505 * tear down everything when
5506 * the module is removed
5507 * or the h/w is unplugged.
5513 /* probes are done, now scan each port's disk(s) */
5514 DPRINTK("host probe begin\n");
5515 for (i
= 0; i
< host
->n_ports
; i
++) {
5516 struct ata_port
*ap
= host
->ports
[i
];
5518 ata_scsi_scan_host(ap
, 1);
5519 ata_lpm_schedule(ap
, ap
->pm_policy
);
5526 * ata_host_activate - start host, request IRQ and register it
5527 * @host: target ATA host
5528 * @irq: IRQ to request
5529 * @irq_handler: irq_handler used when requesting IRQ
5530 * @irq_flags: irq_flags used when requesting IRQ
5531 * @sht: scsi_host_template to use when registering the host
5533 * After allocating an ATA host and initializing it, most libata
5534 * LLDs perform three steps to activate the host - start host,
5535 * request IRQ and register it. This helper takes necessasry
5536 * arguments and performs the three steps in one go.
5538 * An invalid IRQ skips the IRQ registration and expects the host to
5539 * have set polling mode on the port. In this case, @irq_handler
5543 * Inherited from calling layer (may sleep).
5546 * 0 on success, -errno otherwise.
5548 int ata_host_activate(struct ata_host
*host
, int irq
,
5549 irq_handler_t irq_handler
, unsigned long irq_flags
,
5550 struct scsi_host_template
*sht
)
5554 rc
= ata_host_start(host
);
5558 /* Special case for polling mode */
5560 WARN_ON(irq_handler
);
5561 return ata_host_register(host
, sht
);
5564 rc
= devm_request_irq(host
->dev
, irq
, irq_handler
, irq_flags
,
5565 dev_driver_string(host
->dev
), host
);
5569 for (i
= 0; i
< host
->n_ports
; i
++)
5570 ata_port_desc(host
->ports
[i
], "irq %d", irq
);
5572 rc
= ata_host_register(host
, sht
);
5573 /* if failed, just free the IRQ and leave ports alone */
5575 devm_free_irq(host
->dev
, irq
, host
);
5581 * ata_port_detach - Detach ATA port in prepration of device removal
5582 * @ap: ATA port to be detached
5584 * Detach all ATA devices and the associated SCSI devices of @ap;
5585 * then, remove the associated SCSI host. @ap is guaranteed to
5586 * be quiescent on return from this function.
5589 * Kernel thread context (may sleep).
5591 static void ata_port_detach(struct ata_port
*ap
)
5593 unsigned long flags
;
5594 struct ata_link
*link
;
5595 struct ata_device
*dev
;
5597 if (!ap
->ops
->error_handler
)
5600 /* tell EH we're leaving & flush EH */
5601 spin_lock_irqsave(ap
->lock
, flags
);
5602 ap
->pflags
|= ATA_PFLAG_UNLOADING
;
5603 spin_unlock_irqrestore(ap
->lock
, flags
);
5605 ata_port_wait_eh(ap
);
5607 /* EH is now guaranteed to see UNLOADING - EH context belongs
5608 * to us. Disable all existing devices.
5610 ata_port_for_each_link(link
, ap
) {
5611 ata_link_for_each_dev(dev
, link
)
5612 ata_dev_disable(dev
);
5615 /* Final freeze & EH. All in-flight commands are aborted. EH
5616 * will be skipped and retrials will be terminated with bad
5619 spin_lock_irqsave(ap
->lock
, flags
);
5620 ata_port_freeze(ap
); /* won't be thawed */
5621 spin_unlock_irqrestore(ap
->lock
, flags
);
5623 ata_port_wait_eh(ap
);
5624 cancel_rearming_delayed_work(&ap
->hotplug_task
);
5627 /* remove the associated SCSI host */
5628 scsi_remove_host(ap
->scsi_host
);
5632 * ata_host_detach - Detach all ports of an ATA host
5633 * @host: Host to detach
5635 * Detach all ports of @host.
5638 * Kernel thread context (may sleep).
5640 void ata_host_detach(struct ata_host
*host
)
5644 for (i
= 0; i
< host
->n_ports
; i
++)
5645 ata_port_detach(host
->ports
[i
]);
5647 /* the host is dead now, dissociate ACPI */
5648 ata_acpi_dissociate(host
);
5654 * ata_pci_remove_one - PCI layer callback for device removal
5655 * @pdev: PCI device that was removed
5657 * PCI layer indicates to libata via this hook that hot-unplug or
5658 * module unload event has occurred. Detach all ports. Resource
5659 * release is handled via devres.
5662 * Inherited from PCI layer (may sleep).
5664 void ata_pci_remove_one(struct pci_dev
*pdev
)
5666 struct device
*dev
= &pdev
->dev
;
5667 struct ata_host
*host
= dev_get_drvdata(dev
);
5669 ata_host_detach(host
);
5672 /* move to PCI subsystem */
5673 int pci_test_config_bits(struct pci_dev
*pdev
, const struct pci_bits
*bits
)
5675 unsigned long tmp
= 0;
5677 switch (bits
->width
) {
5680 pci_read_config_byte(pdev
, bits
->reg
, &tmp8
);
5686 pci_read_config_word(pdev
, bits
->reg
, &tmp16
);
5692 pci_read_config_dword(pdev
, bits
->reg
, &tmp32
);
5703 return (tmp
== bits
->val
) ? 1 : 0;
5707 void ata_pci_device_do_suspend(struct pci_dev
*pdev
, pm_message_t mesg
)
5709 pci_save_state(pdev
);
5710 pci_disable_device(pdev
);
5712 if (mesg
.event
& PM_EVENT_SLEEP
)
5713 pci_set_power_state(pdev
, PCI_D3hot
);
5716 int ata_pci_device_do_resume(struct pci_dev
*pdev
)
5720 pci_set_power_state(pdev
, PCI_D0
);
5721 pci_restore_state(pdev
);
5723 rc
= pcim_enable_device(pdev
);
5725 dev_printk(KERN_ERR
, &pdev
->dev
,
5726 "failed to enable device after resume (%d)\n", rc
);
5730 pci_set_master(pdev
);
5734 int ata_pci_device_suspend(struct pci_dev
*pdev
, pm_message_t mesg
)
5736 struct ata_host
*host
= dev_get_drvdata(&pdev
->dev
);
5739 rc
= ata_host_suspend(host
, mesg
);
5743 ata_pci_device_do_suspend(pdev
, mesg
);
5748 int ata_pci_device_resume(struct pci_dev
*pdev
)
5750 struct ata_host
*host
= dev_get_drvdata(&pdev
->dev
);
5753 rc
= ata_pci_device_do_resume(pdev
);
5755 ata_host_resume(host
);
5758 #endif /* CONFIG_PM */
5760 #endif /* CONFIG_PCI */
5762 static int __init
ata_parse_force_one(char **cur
,
5763 struct ata_force_ent
*force_ent
,
5764 const char **reason
)
5766 /* FIXME: Currently, there's no way to tag init const data and
5767 * using __initdata causes build failure on some versions of
5768 * gcc. Once __initdataconst is implemented, add const to the
5769 * following structure.
5771 static struct ata_force_param force_tbl
[] __initdata
= {
5772 { "40c", .cbl
= ATA_CBL_PATA40
},
5773 { "80c", .cbl
= ATA_CBL_PATA80
},
5774 { "short40c", .cbl
= ATA_CBL_PATA40_SHORT
},
5775 { "unk", .cbl
= ATA_CBL_PATA_UNK
},
5776 { "ign", .cbl
= ATA_CBL_PATA_IGN
},
5777 { "sata", .cbl
= ATA_CBL_SATA
},
5778 { "1.5Gbps", .spd_limit
= 1 },
5779 { "3.0Gbps", .spd_limit
= 2 },
5780 { "noncq", .horkage_on
= ATA_HORKAGE_NONCQ
},
5781 { "ncq", .horkage_off
= ATA_HORKAGE_NONCQ
},
5782 { "pio0", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 0) },
5783 { "pio1", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 1) },
5784 { "pio2", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 2) },
5785 { "pio3", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 3) },
5786 { "pio4", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 4) },
5787 { "pio5", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 5) },
5788 { "pio6", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 6) },
5789 { "mwdma0", .xfer_mask
= 1 << (ATA_SHIFT_MWDMA
+ 0) },
5790 { "mwdma1", .xfer_mask
= 1 << (ATA_SHIFT_MWDMA
+ 1) },
5791 { "mwdma2", .xfer_mask
= 1 << (ATA_SHIFT_MWDMA
+ 2) },
5792 { "mwdma3", .xfer_mask
= 1 << (ATA_SHIFT_MWDMA
+ 3) },
5793 { "mwdma4", .xfer_mask
= 1 << (ATA_SHIFT_MWDMA
+ 4) },
5794 { "udma0", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 0) },
5795 { "udma16", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 0) },
5796 { "udma/16", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 0) },
5797 { "udma1", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 1) },
5798 { "udma25", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 1) },
5799 { "udma/25", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 1) },
5800 { "udma2", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 2) },
5801 { "udma33", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 2) },
5802 { "udma/33", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 2) },
5803 { "udma3", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 3) },
5804 { "udma44", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 3) },
5805 { "udma/44", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 3) },
5806 { "udma4", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 4) },
5807 { "udma66", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 4) },
5808 { "udma/66", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 4) },
5809 { "udma5", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 5) },
5810 { "udma100", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 5) },
5811 { "udma/100", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 5) },
5812 { "udma6", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 6) },
5813 { "udma133", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 6) },
5814 { "udma/133", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 6) },
5815 { "udma7", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 7) },
5817 char *start
= *cur
, *p
= *cur
;
5818 char *id
, *val
, *endp
;
5819 const struct ata_force_param
*match_fp
= NULL
;
5820 int nr_matches
= 0, i
;
5822 /* find where this param ends and update *cur */
5823 while (*p
!= '\0' && *p
!= ',')
5834 p
= strchr(start
, ':');
5836 val
= strstrip(start
);
5841 id
= strstrip(start
);
5842 val
= strstrip(p
+ 1);
5845 p
= strchr(id
, '.');
5848 force_ent
->device
= simple_strtoul(p
, &endp
, 10);
5849 if (p
== endp
|| *endp
!= '\0') {
5850 *reason
= "invalid device";
5855 force_ent
->port
= simple_strtoul(id
, &endp
, 10);
5856 if (p
== endp
|| *endp
!= '\0') {
5857 *reason
= "invalid port/link";
5862 /* parse val, allow shortcuts so that both 1.5 and 1.5Gbps work */
5863 for (i
= 0; i
< ARRAY_SIZE(force_tbl
); i
++) {
5864 const struct ata_force_param
*fp
= &force_tbl
[i
];
5866 if (strncasecmp(val
, fp
->name
, strlen(val
)))
5872 if (strcasecmp(val
, fp
->name
) == 0) {
5879 *reason
= "unknown value";
5882 if (nr_matches
> 1) {
5883 *reason
= "ambigious value";
5887 force_ent
->param
= *match_fp
;
5892 static void __init
ata_parse_force_param(void)
5894 int idx
= 0, size
= 1;
5895 int last_port
= -1, last_device
= -1;
5896 char *p
, *cur
, *next
;
5898 /* calculate maximum number of params and allocate force_tbl */
5899 for (p
= ata_force_param_buf
; *p
; p
++)
5903 ata_force_tbl
= kzalloc(sizeof(ata_force_tbl
[0]) * size
, GFP_KERNEL
);
5904 if (!ata_force_tbl
) {
5905 printk(KERN_WARNING
"ata: failed to extend force table, "
5906 "libata.force ignored\n");
5910 /* parse and populate the table */
5911 for (cur
= ata_force_param_buf
; *cur
!= '\0'; cur
= next
) {
5912 const char *reason
= "";
5913 struct ata_force_ent te
= { .port
= -1, .device
= -1 };
5916 if (ata_parse_force_one(&next
, &te
, &reason
)) {
5917 printk(KERN_WARNING
"ata: failed to parse force "
5918 "parameter \"%s\" (%s)\n",
5923 if (te
.port
== -1) {
5924 te
.port
= last_port
;
5925 te
.device
= last_device
;
5928 ata_force_tbl
[idx
++] = te
;
5930 last_port
= te
.port
;
5931 last_device
= te
.device
;
5934 ata_force_tbl_size
= idx
;
5937 static int __init
ata_init(void)
5939 ata_probe_timeout
*= HZ
;
5941 ata_parse_force_param();
5943 ata_wq
= create_workqueue("ata");
5947 ata_aux_wq
= create_singlethread_workqueue("ata_aux");
5949 destroy_workqueue(ata_wq
);
5953 printk(KERN_DEBUG
"libata version " DRV_VERSION
" loaded.\n");
5957 static void __exit
ata_exit(void)
5959 kfree(ata_force_tbl
);
5960 destroy_workqueue(ata_wq
);
5961 destroy_workqueue(ata_aux_wq
);
5964 subsys_initcall(ata_init
);
5965 module_exit(ata_exit
);
5967 static unsigned long ratelimit_time
;
5968 static DEFINE_SPINLOCK(ata_ratelimit_lock
);
5970 int ata_ratelimit(void)
5973 unsigned long flags
;
5975 spin_lock_irqsave(&ata_ratelimit_lock
, flags
);
5977 if (time_after(jiffies
, ratelimit_time
)) {
5979 ratelimit_time
= jiffies
+ (HZ
/5);
5983 spin_unlock_irqrestore(&ata_ratelimit_lock
, flags
);
5989 * ata_wait_register - wait until register value changes
5990 * @reg: IO-mapped register
5991 * @mask: Mask to apply to read register value
5992 * @val: Wait condition
5993 * @interval_msec: polling interval in milliseconds
5994 * @timeout_msec: timeout in milliseconds
5996 * Waiting for some bits of register to change is a common
5997 * operation for ATA controllers. This function reads 32bit LE
5998 * IO-mapped register @reg and tests for the following condition.
6000 * (*@reg & mask) != val
6002 * If the condition is met, it returns; otherwise, the process is
6003 * repeated after @interval_msec until timeout.
6006 * Kernel thread context (may sleep)
6009 * The final register value.
6011 u32
ata_wait_register(void __iomem
*reg
, u32 mask
, u32 val
,
6012 unsigned long interval_msec
,
6013 unsigned long timeout_msec
)
6015 unsigned long timeout
;
6018 tmp
= ioread32(reg
);
6020 /* Calculate timeout _after_ the first read to make sure
6021 * preceding writes reach the controller before starting to
6022 * eat away the timeout.
6024 timeout
= jiffies
+ (timeout_msec
* HZ
) / 1000;
6026 while ((tmp
& mask
) == val
&& time_before(jiffies
, timeout
)) {
6027 msleep(interval_msec
);
6028 tmp
= ioread32(reg
);
6037 static void ata_dummy_noret(struct ata_port
*ap
) { }
6038 static int ata_dummy_ret0(struct ata_port
*ap
) { return 0; }
6039 static void ata_dummy_qc_noret(struct ata_queued_cmd
*qc
) { }
6041 static u8
ata_dummy_check_status(struct ata_port
*ap
)
6046 static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd
*qc
)
6048 return AC_ERR_SYSTEM
;
6051 struct ata_port_operations ata_dummy_port_ops
= {
6052 .check_status
= ata_dummy_check_status
,
6053 .check_altstatus
= ata_dummy_check_status
,
6054 .dev_select
= ata_noop_dev_select
,
6055 .qc_prep
= ata_noop_qc_prep
,
6056 .qc_issue
= ata_dummy_qc_issue
,
6057 .freeze
= ata_dummy_noret
,
6058 .thaw
= ata_dummy_noret
,
6059 .error_handler
= ata_dummy_noret
,
6060 .post_internal_cmd
= ata_dummy_qc_noret
,
6061 .irq_clear
= ata_dummy_noret
,
6062 .port_start
= ata_dummy_ret0
,
6063 .port_stop
= ata_dummy_noret
,
6066 const struct ata_port_info ata_dummy_port_info
= {
6067 .port_ops
= &ata_dummy_port_ops
,
6071 * libata is essentially a library of internal helper functions for
6072 * low-level ATA host controller drivers. As such, the API/ABI is
6073 * likely to change as new drivers are added and updated.
6074 * Do not depend on ABI/API stability.
6076 EXPORT_SYMBOL_GPL(sata_deb_timing_normal
);
6077 EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug
);
6078 EXPORT_SYMBOL_GPL(sata_deb_timing_long
);
6079 EXPORT_SYMBOL_GPL(ata_base_port_ops
);
6080 EXPORT_SYMBOL_GPL(sata_port_ops
);
6081 EXPORT_SYMBOL_GPL(sata_pmp_port_ops
);
6082 EXPORT_SYMBOL_GPL(ata_dummy_port_ops
);
6083 EXPORT_SYMBOL_GPL(ata_dummy_port_info
);
6084 EXPORT_SYMBOL_GPL(ata_std_bios_param
);
6085 EXPORT_SYMBOL_GPL(ata_host_init
);
6086 EXPORT_SYMBOL_GPL(ata_host_alloc
);
6087 EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo
);
6088 EXPORT_SYMBOL_GPL(ata_host_start
);
6089 EXPORT_SYMBOL_GPL(ata_host_register
);
6090 EXPORT_SYMBOL_GPL(ata_host_activate
);
6091 EXPORT_SYMBOL_GPL(ata_host_detach
);
6092 EXPORT_SYMBOL_GPL(ata_sg_init
);
6093 EXPORT_SYMBOL_GPL(ata_qc_complete
);
6094 EXPORT_SYMBOL_GPL(ata_qc_complete_multiple
);
6095 EXPORT_SYMBOL_GPL(ata_noop_dev_select
);
6096 EXPORT_SYMBOL_GPL(sata_print_link_status
);
6097 EXPORT_SYMBOL_GPL(atapi_cmd_type
);
6098 EXPORT_SYMBOL_GPL(ata_tf_to_fis
);
6099 EXPORT_SYMBOL_GPL(ata_tf_from_fis
);
6100 EXPORT_SYMBOL_GPL(ata_pack_xfermask
);
6101 EXPORT_SYMBOL_GPL(ata_unpack_xfermask
);
6102 EXPORT_SYMBOL_GPL(ata_xfer_mask2mode
);
6103 EXPORT_SYMBOL_GPL(ata_xfer_mode2mask
);
6104 EXPORT_SYMBOL_GPL(ata_xfer_mode2shift
);
6105 EXPORT_SYMBOL_GPL(ata_mode_string
);
6106 EXPORT_SYMBOL_GPL(ata_id_xfermask
);
6107 EXPORT_SYMBOL_GPL(ata_port_start
);
6108 EXPORT_SYMBOL_GPL(ata_do_set_mode
);
6109 EXPORT_SYMBOL_GPL(ata_std_qc_defer
);
6110 EXPORT_SYMBOL_GPL(ata_noop_qc_prep
);
6111 EXPORT_SYMBOL_GPL(ata_noop_irq_clear
);
6112 EXPORT_SYMBOL_GPL(ata_port_probe
);
6113 EXPORT_SYMBOL_GPL(ata_dev_disable
);
6114 EXPORT_SYMBOL_GPL(sata_set_spd
);
6115 EXPORT_SYMBOL_GPL(sata_link_debounce
);
6116 EXPORT_SYMBOL_GPL(sata_link_resume
);
6117 EXPORT_SYMBOL_GPL(sata_link_hardreset
);
6118 EXPORT_SYMBOL_GPL(ata_dev_classify
);
6119 EXPORT_SYMBOL_GPL(ata_dev_pair
);
6120 EXPORT_SYMBOL_GPL(ata_port_disable
);
6121 EXPORT_SYMBOL_GPL(ata_ratelimit
);
6122 EXPORT_SYMBOL_GPL(ata_wait_register
);
6123 EXPORT_SYMBOL_GPL(ata_scsi_ioctl
);
6124 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd
);
6125 EXPORT_SYMBOL_GPL(ata_scsi_slave_config
);
6126 EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy
);
6127 EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth
);
6128 EXPORT_SYMBOL_GPL(sata_scr_valid
);
6129 EXPORT_SYMBOL_GPL(sata_scr_read
);
6130 EXPORT_SYMBOL_GPL(sata_scr_write
);
6131 EXPORT_SYMBOL_GPL(sata_scr_write_flush
);
6132 EXPORT_SYMBOL_GPL(ata_link_online
);
6133 EXPORT_SYMBOL_GPL(ata_link_offline
);
6135 EXPORT_SYMBOL_GPL(ata_host_suspend
);
6136 EXPORT_SYMBOL_GPL(ata_host_resume
);
6137 #endif /* CONFIG_PM */
6138 EXPORT_SYMBOL_GPL(ata_id_string
);
6139 EXPORT_SYMBOL_GPL(ata_id_c_string
);
6140 EXPORT_SYMBOL_GPL(ata_scsi_simulate
);
6142 EXPORT_SYMBOL_GPL(ata_pio_need_iordy
);
6143 EXPORT_SYMBOL_GPL(ata_timing_find_mode
);
6144 EXPORT_SYMBOL_GPL(ata_timing_compute
);
6145 EXPORT_SYMBOL_GPL(ata_timing_merge
);
6146 EXPORT_SYMBOL_GPL(ata_timing_cycle2mode
);
6149 EXPORT_SYMBOL_GPL(pci_test_config_bits
);
6150 EXPORT_SYMBOL_GPL(ata_pci_remove_one
);
6152 EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend
);
6153 EXPORT_SYMBOL_GPL(ata_pci_device_do_resume
);
6154 EXPORT_SYMBOL_GPL(ata_pci_device_suspend
);
6155 EXPORT_SYMBOL_GPL(ata_pci_device_resume
);
6156 #endif /* CONFIG_PM */
6157 #endif /* CONFIG_PCI */
6159 EXPORT_SYMBOL_GPL(sata_pmp_qc_defer_cmd_switch
);
6160 EXPORT_SYMBOL_GPL(sata_pmp_std_prereset
);
6161 EXPORT_SYMBOL_GPL(sata_pmp_std_hardreset
);
6162 EXPORT_SYMBOL_GPL(sata_pmp_std_postreset
);
6163 EXPORT_SYMBOL_GPL(sata_pmp_error_handler
);
6165 EXPORT_SYMBOL_GPL(__ata_ehi_push_desc
);
6166 EXPORT_SYMBOL_GPL(ata_ehi_push_desc
);
6167 EXPORT_SYMBOL_GPL(ata_ehi_clear_desc
);
6168 EXPORT_SYMBOL_GPL(ata_port_desc
);
6170 EXPORT_SYMBOL_GPL(ata_port_pbar_desc
);
6171 #endif /* CONFIG_PCI */
6172 EXPORT_SYMBOL_GPL(ata_port_schedule_eh
);
6173 EXPORT_SYMBOL_GPL(ata_link_abort
);
6174 EXPORT_SYMBOL_GPL(ata_port_abort
);
6175 EXPORT_SYMBOL_GPL(ata_port_freeze
);
6176 EXPORT_SYMBOL_GPL(sata_async_notification
);
6177 EXPORT_SYMBOL_GPL(ata_eh_freeze_port
);
6178 EXPORT_SYMBOL_GPL(ata_eh_thaw_port
);
6179 EXPORT_SYMBOL_GPL(ata_eh_qc_complete
);
6180 EXPORT_SYMBOL_GPL(ata_eh_qc_retry
);
6181 EXPORT_SYMBOL_GPL(ata_do_eh
);
6182 EXPORT_SYMBOL_GPL(ata_std_error_handler
);
6184 EXPORT_SYMBOL_GPL(ata_cable_40wire
);
6185 EXPORT_SYMBOL_GPL(ata_cable_80wire
);
6186 EXPORT_SYMBOL_GPL(ata_cable_unknown
);
6187 EXPORT_SYMBOL_GPL(ata_cable_ignore
);
6188 EXPORT_SYMBOL_GPL(ata_cable_sata
);