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/highmem.h>
50 #include <linux/spinlock.h>
51 #include <linux/blkdev.h>
52 #include <linux/delay.h>
53 #include <linux/timer.h>
54 #include <linux/interrupt.h>
55 #include <linux/completion.h>
56 #include <linux/suspend.h>
57 #include <linux/workqueue.h>
58 #include <linux/jiffies.h>
59 #include <linux/scatterlist.h>
61 #include <scsi/scsi.h>
62 #include <scsi/scsi_cmnd.h>
63 #include <scsi/scsi_host.h>
64 #include <linux/libata.h>
65 #include <asm/semaphore.h>
66 #include <asm/byteorder.h>
67 #include <linux/cdrom.h>
72 /* debounce timing parameters in msecs { interval, duration, timeout } */
73 const unsigned long sata_deb_timing_normal
[] = { 5, 100, 2000 };
74 const unsigned long sata_deb_timing_hotplug
[] = { 25, 500, 2000 };
75 const unsigned long sata_deb_timing_long
[] = { 100, 2000, 5000 };
77 const struct ata_port_operations ata_base_port_ops
= {
78 .irq_clear
= ata_noop_irq_clear
,
79 .prereset
= ata_std_prereset
,
80 .hardreset
= sata_std_hardreset
,
81 .postreset
= ata_std_postreset
,
82 .error_handler
= ata_std_error_handler
,
85 const struct ata_port_operations sata_port_ops
= {
86 .inherits
= &ata_base_port_ops
,
88 .qc_defer
= ata_std_qc_defer
,
89 .dev_select
= ata_noop_dev_select
,
92 const struct ata_port_operations sata_pmp_port_ops
= {
93 .inherits
= &sata_port_ops
,
95 .pmp_prereset
= sata_pmp_std_prereset
,
96 .pmp_hardreset
= sata_pmp_std_hardreset
,
97 .pmp_postreset
= sata_pmp_std_postreset
,
98 .error_handler
= sata_pmp_error_handler
,
101 const struct ata_port_operations ata_sff_port_ops
= {
102 .inherits
= &ata_base_port_ops
,
104 .qc_prep
= ata_qc_prep
,
105 .qc_issue
= ata_qc_issue_prot
,
107 .freeze
= ata_bmdma_freeze
,
108 .thaw
= ata_bmdma_thaw
,
109 .softreset
= ata_std_softreset
,
110 .error_handler
= ata_bmdma_error_handler
,
111 .post_internal_cmd
= ata_bmdma_post_internal_cmd
,
113 .dev_select
= ata_std_dev_select
,
114 .check_status
= ata_check_status
,
115 .tf_load
= ata_tf_load
,
116 .tf_read
= ata_tf_read
,
117 .exec_command
= ata_exec_command
,
118 .data_xfer
= ata_data_xfer
,
119 .irq_on
= ata_irq_on
,
121 .port_start
= ata_sff_port_start
,
124 const struct ata_port_operations ata_bmdma_port_ops
= {
125 .inherits
= &ata_sff_port_ops
,
127 .mode_filter
= ata_pci_default_filter
,
129 .bmdma_setup
= ata_bmdma_setup
,
130 .bmdma_start
= ata_bmdma_start
,
131 .bmdma_stop
= ata_bmdma_stop
,
132 .bmdma_status
= ata_bmdma_status
,
133 .irq_clear
= ata_bmdma_irq_clear
,
136 static unsigned int ata_dev_init_params(struct ata_device
*dev
,
137 u16 heads
, u16 sectors
);
138 static unsigned int ata_dev_set_xfermode(struct ata_device
*dev
);
139 static unsigned int ata_dev_set_feature(struct ata_device
*dev
,
140 u8 enable
, u8 feature
);
141 static void ata_dev_xfermask(struct ata_device
*dev
);
142 static unsigned long ata_dev_blacklisted(const struct ata_device
*dev
);
144 unsigned int ata_print_id
= 1;
145 static struct workqueue_struct
*ata_wq
;
147 struct workqueue_struct
*ata_aux_wq
;
149 struct ata_force_param
{
153 unsigned long xfer_mask
;
154 unsigned int horkage_on
;
155 unsigned int horkage_off
;
158 struct ata_force_ent
{
161 struct ata_force_param param
;
164 static struct ata_force_ent
*ata_force_tbl
;
165 static int ata_force_tbl_size
;
167 static char ata_force_param_buf
[PAGE_SIZE
] __initdata
;
168 /* param_buf is thrown away after initialization, disallow read */
169 module_param_string(force
, ata_force_param_buf
, sizeof(ata_force_param_buf
), 0);
170 MODULE_PARM_DESC(force
, "Force ATA configurations including cable type, link speed and transfer mode (see Documentation/kernel-parameters.txt for details)");
172 int atapi_enabled
= 1;
173 module_param(atapi_enabled
, int, 0444);
174 MODULE_PARM_DESC(atapi_enabled
, "Enable discovery of ATAPI devices (0=off, 1=on)");
176 static int atapi_dmadir
= 0;
177 module_param(atapi_dmadir
, int, 0444);
178 MODULE_PARM_DESC(atapi_dmadir
, "Enable ATAPI DMADIR bridge support (0=off, 1=on)");
180 int atapi_passthru16
= 1;
181 module_param(atapi_passthru16
, int, 0444);
182 MODULE_PARM_DESC(atapi_passthru16
, "Enable ATA_16 passthru for ATAPI devices; on by default (0=off, 1=on)");
185 module_param_named(fua
, libata_fua
, int, 0444);
186 MODULE_PARM_DESC(fua
, "FUA support (0=off, 1=on)");
188 static int ata_ignore_hpa
;
189 module_param_named(ignore_hpa
, ata_ignore_hpa
, int, 0644);
190 MODULE_PARM_DESC(ignore_hpa
, "Ignore HPA limit (0=keep BIOS limits, 1=ignore limits, using full disk)");
192 static int libata_dma_mask
= ATA_DMA_MASK_ATA
|ATA_DMA_MASK_ATAPI
|ATA_DMA_MASK_CFA
;
193 module_param_named(dma
, libata_dma_mask
, int, 0444);
194 MODULE_PARM_DESC(dma
, "DMA enable/disable (0x1==ATA, 0x2==ATAPI, 0x4==CF)");
196 static int ata_probe_timeout
= ATA_TMOUT_INTERNAL
/ HZ
;
197 module_param(ata_probe_timeout
, int, 0444);
198 MODULE_PARM_DESC(ata_probe_timeout
, "Set ATA probing timeout (seconds)");
200 int libata_noacpi
= 0;
201 module_param_named(noacpi
, libata_noacpi
, int, 0444);
202 MODULE_PARM_DESC(noacpi
, "Disables the use of ACPI in probe/suspend/resume when set");
204 int libata_allow_tpm
= 0;
205 module_param_named(allow_tpm
, libata_allow_tpm
, int, 0444);
206 MODULE_PARM_DESC(allow_tpm
, "Permit the use of TPM commands");
208 MODULE_AUTHOR("Jeff Garzik");
209 MODULE_DESCRIPTION("Library module for ATA devices");
210 MODULE_LICENSE("GPL");
211 MODULE_VERSION(DRV_VERSION
);
215 * ata_force_cbl - force cable type according to libata.force
216 * @ap: ATA port of interest
218 * Force cable type according to libata.force and whine about it.
219 * The last entry which has matching port number is used, so it
220 * can be specified as part of device force parameters. For
221 * example, both "a:40c,1.00:udma4" and "1.00:40c,udma4" have the
227 void ata_force_cbl(struct ata_port
*ap
)
231 for (i
= ata_force_tbl_size
- 1; i
>= 0; i
--) {
232 const struct ata_force_ent
*fe
= &ata_force_tbl
[i
];
234 if (fe
->port
!= -1 && fe
->port
!= ap
->print_id
)
237 if (fe
->param
.cbl
== ATA_CBL_NONE
)
240 ap
->cbl
= fe
->param
.cbl
;
241 ata_port_printk(ap
, KERN_NOTICE
,
242 "FORCE: cable set to %s\n", fe
->param
.name
);
248 * ata_force_spd_limit - force SATA spd limit according to libata.force
249 * @link: ATA link of interest
251 * Force SATA spd limit according to libata.force and whine about
252 * it. When only the port part is specified (e.g. 1:), the limit
253 * applies to all links connected to both the host link and all
254 * fan-out ports connected via PMP. If the device part is
255 * specified as 0 (e.g. 1.00:), it specifies the first fan-out
256 * link not the host link. Device number 15 always points to the
257 * host link whether PMP is attached or not.
262 static void ata_force_spd_limit(struct ata_link
*link
)
266 if (ata_is_host_link(link
))
271 for (i
= ata_force_tbl_size
- 1; i
>= 0; i
--) {
272 const struct ata_force_ent
*fe
= &ata_force_tbl
[i
];
274 if (fe
->port
!= -1 && fe
->port
!= link
->ap
->print_id
)
277 if (fe
->device
!= -1 && fe
->device
!= linkno
)
280 if (!fe
->param
.spd_limit
)
283 link
->hw_sata_spd_limit
= (1 << fe
->param
.spd_limit
) - 1;
284 ata_link_printk(link
, KERN_NOTICE
,
285 "FORCE: PHY spd limit set to %s\n", fe
->param
.name
);
291 * ata_force_xfermask - force xfermask according to libata.force
292 * @dev: ATA device of interest
294 * Force xfer_mask according to libata.force and whine about it.
295 * For consistency with link selection, device number 15 selects
296 * the first device connected to the host link.
301 static void ata_force_xfermask(struct ata_device
*dev
)
303 int devno
= dev
->link
->pmp
+ dev
->devno
;
304 int alt_devno
= devno
;
307 /* allow n.15 for the first device attached to host port */
308 if (ata_is_host_link(dev
->link
) && devno
== 0)
311 for (i
= ata_force_tbl_size
- 1; i
>= 0; i
--) {
312 const struct ata_force_ent
*fe
= &ata_force_tbl
[i
];
313 unsigned long pio_mask
, mwdma_mask
, udma_mask
;
315 if (fe
->port
!= -1 && fe
->port
!= dev
->link
->ap
->print_id
)
318 if (fe
->device
!= -1 && fe
->device
!= devno
&&
319 fe
->device
!= alt_devno
)
322 if (!fe
->param
.xfer_mask
)
325 ata_unpack_xfermask(fe
->param
.xfer_mask
,
326 &pio_mask
, &mwdma_mask
, &udma_mask
);
328 dev
->udma_mask
= udma_mask
;
329 else if (mwdma_mask
) {
331 dev
->mwdma_mask
= mwdma_mask
;
335 dev
->pio_mask
= pio_mask
;
338 ata_dev_printk(dev
, KERN_NOTICE
,
339 "FORCE: xfer_mask set to %s\n", fe
->param
.name
);
345 * ata_force_horkage - force horkage according to libata.force
346 * @dev: ATA device of interest
348 * Force horkage according to libata.force and whine about it.
349 * For consistency with link selection, device number 15 selects
350 * the first device connected to the host link.
355 static void ata_force_horkage(struct ata_device
*dev
)
357 int devno
= dev
->link
->pmp
+ dev
->devno
;
358 int alt_devno
= devno
;
361 /* allow n.15 for the first device attached to host port */
362 if (ata_is_host_link(dev
->link
) && devno
== 0)
365 for (i
= 0; i
< ata_force_tbl_size
; i
++) {
366 const struct ata_force_ent
*fe
= &ata_force_tbl
[i
];
368 if (fe
->port
!= -1 && fe
->port
!= dev
->link
->ap
->print_id
)
371 if (fe
->device
!= -1 && fe
->device
!= devno
&&
372 fe
->device
!= alt_devno
)
375 if (!(~dev
->horkage
& fe
->param
.horkage_on
) &&
376 !(dev
->horkage
& fe
->param
.horkage_off
))
379 dev
->horkage
|= fe
->param
.horkage_on
;
380 dev
->horkage
&= ~fe
->param
.horkage_off
;
382 ata_dev_printk(dev
, KERN_NOTICE
,
383 "FORCE: horkage modified (%s)\n", fe
->param
.name
);
388 * atapi_cmd_type - Determine ATAPI command type from SCSI opcode
389 * @opcode: SCSI opcode
391 * Determine ATAPI command type from @opcode.
397 * ATAPI_{READ|WRITE|READ_CD|PASS_THRU|MISC}
399 int atapi_cmd_type(u8 opcode
)
408 case GPCMD_WRITE_AND_VERIFY_10
:
412 case GPCMD_READ_CD_MSF
:
413 return ATAPI_READ_CD
;
417 if (atapi_passthru16
)
418 return ATAPI_PASS_THRU
;
426 * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure
427 * @tf: Taskfile to convert
428 * @pmp: Port multiplier port
429 * @is_cmd: This FIS is for command
430 * @fis: Buffer into which data will output
432 * Converts a standard ATA taskfile to a Serial ATA
433 * FIS structure (Register - Host to Device).
436 * Inherited from caller.
438 void ata_tf_to_fis(const struct ata_taskfile
*tf
, u8 pmp
, int is_cmd
, u8
*fis
)
440 fis
[0] = 0x27; /* Register - Host to Device FIS */
441 fis
[1] = pmp
& 0xf; /* Port multiplier number*/
443 fis
[1] |= (1 << 7); /* bit 7 indicates Command FIS */
445 fis
[2] = tf
->command
;
446 fis
[3] = tf
->feature
;
453 fis
[8] = tf
->hob_lbal
;
454 fis
[9] = tf
->hob_lbam
;
455 fis
[10] = tf
->hob_lbah
;
456 fis
[11] = tf
->hob_feature
;
459 fis
[13] = tf
->hob_nsect
;
470 * ata_tf_from_fis - Convert SATA FIS to ATA taskfile
471 * @fis: Buffer from which data will be input
472 * @tf: Taskfile to output
474 * Converts a serial ATA FIS structure to a standard ATA taskfile.
477 * Inherited from caller.
480 void ata_tf_from_fis(const u8
*fis
, struct ata_taskfile
*tf
)
482 tf
->command
= fis
[2]; /* status */
483 tf
->feature
= fis
[3]; /* error */
490 tf
->hob_lbal
= fis
[8];
491 tf
->hob_lbam
= fis
[9];
492 tf
->hob_lbah
= fis
[10];
495 tf
->hob_nsect
= fis
[13];
498 static const u8 ata_rw_cmds
[] = {
502 ATA_CMD_READ_MULTI_EXT
,
503 ATA_CMD_WRITE_MULTI_EXT
,
507 ATA_CMD_WRITE_MULTI_FUA_EXT
,
511 ATA_CMD_PIO_READ_EXT
,
512 ATA_CMD_PIO_WRITE_EXT
,
525 ATA_CMD_WRITE_FUA_EXT
529 * ata_rwcmd_protocol - set taskfile r/w commands and protocol
530 * @tf: command to examine and configure
531 * @dev: device tf belongs to
533 * Examine the device configuration and tf->flags to calculate
534 * the proper read/write commands and protocol to use.
539 static int ata_rwcmd_protocol(struct ata_taskfile
*tf
, struct ata_device
*dev
)
543 int index
, fua
, lba48
, write
;
545 fua
= (tf
->flags
& ATA_TFLAG_FUA
) ? 4 : 0;
546 lba48
= (tf
->flags
& ATA_TFLAG_LBA48
) ? 2 : 0;
547 write
= (tf
->flags
& ATA_TFLAG_WRITE
) ? 1 : 0;
549 if (dev
->flags
& ATA_DFLAG_PIO
) {
550 tf
->protocol
= ATA_PROT_PIO
;
551 index
= dev
->multi_count
? 0 : 8;
552 } else if (lba48
&& (dev
->link
->ap
->flags
& ATA_FLAG_PIO_LBA48
)) {
553 /* Unable to use DMA due to host limitation */
554 tf
->protocol
= ATA_PROT_PIO
;
555 index
= dev
->multi_count
? 0 : 8;
557 tf
->protocol
= ATA_PROT_DMA
;
561 cmd
= ata_rw_cmds
[index
+ fua
+ lba48
+ write
];
570 * ata_tf_read_block - Read block address from ATA taskfile
571 * @tf: ATA taskfile of interest
572 * @dev: ATA device @tf belongs to
577 * Read block address from @tf. This function can handle all
578 * three address formats - LBA, LBA48 and CHS. tf->protocol and
579 * flags select the address format to use.
582 * Block address read from @tf.
584 u64
ata_tf_read_block(struct ata_taskfile
*tf
, struct ata_device
*dev
)
588 if (tf
->flags
& ATA_TFLAG_LBA
) {
589 if (tf
->flags
& ATA_TFLAG_LBA48
) {
590 block
|= (u64
)tf
->hob_lbah
<< 40;
591 block
|= (u64
)tf
->hob_lbam
<< 32;
592 block
|= tf
->hob_lbal
<< 24;
594 block
|= (tf
->device
& 0xf) << 24;
596 block
|= tf
->lbah
<< 16;
597 block
|= tf
->lbam
<< 8;
602 cyl
= tf
->lbam
| (tf
->lbah
<< 8);
603 head
= tf
->device
& 0xf;
606 block
= (cyl
* dev
->heads
+ head
) * dev
->sectors
+ sect
;
613 * ata_build_rw_tf - Build ATA taskfile for given read/write request
614 * @tf: Target ATA taskfile
615 * @dev: ATA device @tf belongs to
616 * @block: Block address
617 * @n_block: Number of blocks
618 * @tf_flags: RW/FUA etc...
624 * Build ATA taskfile @tf for read/write request described by
625 * @block, @n_block, @tf_flags and @tag on @dev.
629 * 0 on success, -ERANGE if the request is too large for @dev,
630 * -EINVAL if the request is invalid.
632 int ata_build_rw_tf(struct ata_taskfile
*tf
, struct ata_device
*dev
,
633 u64 block
, u32 n_block
, unsigned int tf_flags
,
636 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
637 tf
->flags
|= tf_flags
;
639 if (ata_ncq_enabled(dev
) && likely(tag
!= ATA_TAG_INTERNAL
)) {
641 if (!lba_48_ok(block
, n_block
))
644 tf
->protocol
= ATA_PROT_NCQ
;
645 tf
->flags
|= ATA_TFLAG_LBA
| ATA_TFLAG_LBA48
;
647 if (tf
->flags
& ATA_TFLAG_WRITE
)
648 tf
->command
= ATA_CMD_FPDMA_WRITE
;
650 tf
->command
= ATA_CMD_FPDMA_READ
;
652 tf
->nsect
= tag
<< 3;
653 tf
->hob_feature
= (n_block
>> 8) & 0xff;
654 tf
->feature
= n_block
& 0xff;
656 tf
->hob_lbah
= (block
>> 40) & 0xff;
657 tf
->hob_lbam
= (block
>> 32) & 0xff;
658 tf
->hob_lbal
= (block
>> 24) & 0xff;
659 tf
->lbah
= (block
>> 16) & 0xff;
660 tf
->lbam
= (block
>> 8) & 0xff;
661 tf
->lbal
= block
& 0xff;
664 if (tf
->flags
& ATA_TFLAG_FUA
)
665 tf
->device
|= 1 << 7;
666 } else if (dev
->flags
& ATA_DFLAG_LBA
) {
667 tf
->flags
|= ATA_TFLAG_LBA
;
669 if (lba_28_ok(block
, n_block
)) {
671 tf
->device
|= (block
>> 24) & 0xf;
672 } else if (lba_48_ok(block
, n_block
)) {
673 if (!(dev
->flags
& ATA_DFLAG_LBA48
))
677 tf
->flags
|= ATA_TFLAG_LBA48
;
679 tf
->hob_nsect
= (n_block
>> 8) & 0xff;
681 tf
->hob_lbah
= (block
>> 40) & 0xff;
682 tf
->hob_lbam
= (block
>> 32) & 0xff;
683 tf
->hob_lbal
= (block
>> 24) & 0xff;
685 /* request too large even for LBA48 */
688 if (unlikely(ata_rwcmd_protocol(tf
, dev
) < 0))
691 tf
->nsect
= n_block
& 0xff;
693 tf
->lbah
= (block
>> 16) & 0xff;
694 tf
->lbam
= (block
>> 8) & 0xff;
695 tf
->lbal
= block
& 0xff;
697 tf
->device
|= ATA_LBA
;
700 u32 sect
, head
, cyl
, track
;
702 /* The request -may- be too large for CHS addressing. */
703 if (!lba_28_ok(block
, n_block
))
706 if (unlikely(ata_rwcmd_protocol(tf
, dev
) < 0))
709 /* Convert LBA to CHS */
710 track
= (u32
)block
/ dev
->sectors
;
711 cyl
= track
/ dev
->heads
;
712 head
= track
% dev
->heads
;
713 sect
= (u32
)block
% dev
->sectors
+ 1;
715 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
716 (u32
)block
, track
, cyl
, head
, sect
);
718 /* Check whether the converted CHS can fit.
722 if ((cyl
>> 16) || (head
>> 4) || (sect
>> 8) || (!sect
))
725 tf
->nsect
= n_block
& 0xff; /* Sector count 0 means 256 sectors */
736 * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask
737 * @pio_mask: pio_mask
738 * @mwdma_mask: mwdma_mask
739 * @udma_mask: udma_mask
741 * Pack @pio_mask, @mwdma_mask and @udma_mask into a single
742 * unsigned int xfer_mask.
750 unsigned long ata_pack_xfermask(unsigned long pio_mask
,
751 unsigned long mwdma_mask
,
752 unsigned long udma_mask
)
754 return ((pio_mask
<< ATA_SHIFT_PIO
) & ATA_MASK_PIO
) |
755 ((mwdma_mask
<< ATA_SHIFT_MWDMA
) & ATA_MASK_MWDMA
) |
756 ((udma_mask
<< ATA_SHIFT_UDMA
) & ATA_MASK_UDMA
);
760 * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks
761 * @xfer_mask: xfer_mask to unpack
762 * @pio_mask: resulting pio_mask
763 * @mwdma_mask: resulting mwdma_mask
764 * @udma_mask: resulting udma_mask
766 * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask.
767 * Any NULL distination masks will be ignored.
769 void ata_unpack_xfermask(unsigned long xfer_mask
, unsigned long *pio_mask
,
770 unsigned long *mwdma_mask
, unsigned long *udma_mask
)
773 *pio_mask
= (xfer_mask
& ATA_MASK_PIO
) >> ATA_SHIFT_PIO
;
775 *mwdma_mask
= (xfer_mask
& ATA_MASK_MWDMA
) >> ATA_SHIFT_MWDMA
;
777 *udma_mask
= (xfer_mask
& ATA_MASK_UDMA
) >> ATA_SHIFT_UDMA
;
780 static const struct ata_xfer_ent
{
784 { ATA_SHIFT_PIO
, ATA_NR_PIO_MODES
, XFER_PIO_0
},
785 { ATA_SHIFT_MWDMA
, ATA_NR_MWDMA_MODES
, XFER_MW_DMA_0
},
786 { ATA_SHIFT_UDMA
, ATA_NR_UDMA_MODES
, XFER_UDMA_0
},
791 * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask
792 * @xfer_mask: xfer_mask of interest
794 * Return matching XFER_* value for @xfer_mask. Only the highest
795 * bit of @xfer_mask is considered.
801 * Matching XFER_* value, 0xff if no match found.
803 u8
ata_xfer_mask2mode(unsigned long xfer_mask
)
805 int highbit
= fls(xfer_mask
) - 1;
806 const struct ata_xfer_ent
*ent
;
808 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
809 if (highbit
>= ent
->shift
&& highbit
< ent
->shift
+ ent
->bits
)
810 return ent
->base
+ highbit
- ent
->shift
;
815 * ata_xfer_mode2mask - Find matching xfer_mask for XFER_*
816 * @xfer_mode: XFER_* of interest
818 * Return matching xfer_mask for @xfer_mode.
824 * Matching xfer_mask, 0 if no match found.
826 unsigned long ata_xfer_mode2mask(u8 xfer_mode
)
828 const struct ata_xfer_ent
*ent
;
830 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
831 if (xfer_mode
>= ent
->base
&& xfer_mode
< ent
->base
+ ent
->bits
)
832 return ((2 << (ent
->shift
+ xfer_mode
- ent
->base
)) - 1)
833 & ~((1 << ent
->shift
) - 1);
838 * ata_xfer_mode2shift - Find matching xfer_shift for XFER_*
839 * @xfer_mode: XFER_* of interest
841 * Return matching xfer_shift for @xfer_mode.
847 * Matching xfer_shift, -1 if no match found.
849 int ata_xfer_mode2shift(unsigned long xfer_mode
)
851 const struct ata_xfer_ent
*ent
;
853 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
854 if (xfer_mode
>= ent
->base
&& xfer_mode
< ent
->base
+ ent
->bits
)
860 * ata_mode_string - convert xfer_mask to string
861 * @xfer_mask: mask of bits supported; only highest bit counts.
863 * Determine string which represents the highest speed
864 * (highest bit in @modemask).
870 * Constant C string representing highest speed listed in
871 * @mode_mask, or the constant C string "<n/a>".
873 const char *ata_mode_string(unsigned long xfer_mask
)
875 static const char * const xfer_mode_str
[] = {
899 highbit
= fls(xfer_mask
) - 1;
900 if (highbit
>= 0 && highbit
< ARRAY_SIZE(xfer_mode_str
))
901 return xfer_mode_str
[highbit
];
905 static const char *sata_spd_string(unsigned int spd
)
907 static const char * const spd_str
[] = {
912 if (spd
== 0 || (spd
- 1) >= ARRAY_SIZE(spd_str
))
914 return spd_str
[spd
- 1];
917 void ata_dev_disable(struct ata_device
*dev
)
919 if (ata_dev_enabled(dev
)) {
920 if (ata_msg_drv(dev
->link
->ap
))
921 ata_dev_printk(dev
, KERN_WARNING
, "disabled\n");
922 ata_acpi_on_disable(dev
);
923 ata_down_xfermask_limit(dev
, ATA_DNXFER_FORCE_PIO0
|
929 static int ata_dev_set_dipm(struct ata_device
*dev
, enum link_pm policy
)
931 struct ata_link
*link
= dev
->link
;
932 struct ata_port
*ap
= link
->ap
;
934 unsigned int err_mask
;
938 * disallow DIPM for drivers which haven't set
939 * ATA_FLAG_IPM. This is because when DIPM is enabled,
940 * phy ready will be set in the interrupt status on
941 * state changes, which will cause some drivers to
942 * think there are errors - additionally drivers will
943 * need to disable hot plug.
945 if (!(ap
->flags
& ATA_FLAG_IPM
) || !ata_dev_enabled(dev
)) {
946 ap
->pm_policy
= NOT_AVAILABLE
;
951 * For DIPM, we will only enable it for the
954 * Why? Because Disks are too stupid to know that
955 * If the host rejects a request to go to SLUMBER
956 * they should retry at PARTIAL, and instead it
957 * just would give up. So, for medium_power to
958 * work at all, we need to only allow HIPM.
960 rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
);
966 /* no restrictions on IPM transitions */
967 scontrol
&= ~(0x3 << 8);
968 rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
);
973 if (dev
->flags
& ATA_DFLAG_DIPM
)
974 err_mask
= ata_dev_set_feature(dev
,
975 SETFEATURES_SATA_ENABLE
, SATA_DIPM
);
978 /* allow IPM to PARTIAL */
979 scontrol
&= ~(0x1 << 8);
980 scontrol
|= (0x2 << 8);
981 rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
);
986 * we don't have to disable DIPM since IPM flags
987 * disallow transitions to SLUMBER, which effectively
988 * disable DIPM if it does not support PARTIAL
992 case MAX_PERFORMANCE
:
993 /* disable all IPM transitions */
994 scontrol
|= (0x3 << 8);
995 rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
);
1000 * we don't have to disable DIPM since IPM flags
1001 * disallow all transitions which effectively
1002 * disable DIPM anyway.
1007 /* FIXME: handle SET FEATURES failure */
1014 * ata_dev_enable_pm - enable SATA interface power management
1015 * @dev: device to enable power management
1016 * @policy: the link power management policy
1018 * Enable SATA Interface power management. This will enable
1019 * Device Interface Power Management (DIPM) for min_power
1020 * policy, and then call driver specific callbacks for
1021 * enabling Host Initiated Power management.
1024 * Returns: -EINVAL if IPM is not supported, 0 otherwise.
1026 void ata_dev_enable_pm(struct ata_device
*dev
, enum link_pm policy
)
1029 struct ata_port
*ap
= dev
->link
->ap
;
1031 /* set HIPM first, then DIPM */
1032 if (ap
->ops
->enable_pm
)
1033 rc
= ap
->ops
->enable_pm(ap
, policy
);
1036 rc
= ata_dev_set_dipm(dev
, policy
);
1040 ap
->pm_policy
= MAX_PERFORMANCE
;
1042 ap
->pm_policy
= policy
;
1043 return /* rc */; /* hopefully we can use 'rc' eventually */
1048 * ata_dev_disable_pm - disable SATA interface power management
1049 * @dev: device to disable power management
1051 * Disable SATA Interface power management. This will disable
1052 * Device Interface Power Management (DIPM) without changing
1053 * policy, call driver specific callbacks for disabling Host
1054 * Initiated Power management.
1059 static void ata_dev_disable_pm(struct ata_device
*dev
)
1061 struct ata_port
*ap
= dev
->link
->ap
;
1063 ata_dev_set_dipm(dev
, MAX_PERFORMANCE
);
1064 if (ap
->ops
->disable_pm
)
1065 ap
->ops
->disable_pm(ap
);
1067 #endif /* CONFIG_PM */
1069 void ata_lpm_schedule(struct ata_port
*ap
, enum link_pm policy
)
1071 ap
->pm_policy
= policy
;
1072 ap
->link
.eh_info
.action
|= ATA_EH_LPM
;
1073 ap
->link
.eh_info
.flags
|= ATA_EHI_NO_AUTOPSY
;
1074 ata_port_schedule_eh(ap
);
1078 static void ata_lpm_enable(struct ata_host
*host
)
1080 struct ata_link
*link
;
1081 struct ata_port
*ap
;
1082 struct ata_device
*dev
;
1085 for (i
= 0; i
< host
->n_ports
; i
++) {
1086 ap
= host
->ports
[i
];
1087 ata_port_for_each_link(link
, ap
) {
1088 ata_link_for_each_dev(dev
, link
)
1089 ata_dev_disable_pm(dev
);
1094 static void ata_lpm_disable(struct ata_host
*host
)
1098 for (i
= 0; i
< host
->n_ports
; i
++) {
1099 struct ata_port
*ap
= host
->ports
[i
];
1100 ata_lpm_schedule(ap
, ap
->pm_policy
);
1103 #endif /* CONFIG_PM */
1107 * ata_devchk - PATA device presence detection
1108 * @ap: ATA channel to examine
1109 * @device: Device to examine (starting at zero)
1111 * This technique was originally described in
1112 * Hale Landis's ATADRVR (www.ata-atapi.com), and
1113 * later found its way into the ATA/ATAPI spec.
1115 * Write a pattern to the ATA shadow registers,
1116 * and if a device is present, it will respond by
1117 * correctly storing and echoing back the
1118 * ATA shadow register contents.
1124 static unsigned int ata_devchk(struct ata_port
*ap
, unsigned int device
)
1126 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
1129 ap
->ops
->dev_select(ap
, device
);
1131 iowrite8(0x55, ioaddr
->nsect_addr
);
1132 iowrite8(0xaa, ioaddr
->lbal_addr
);
1134 iowrite8(0xaa, ioaddr
->nsect_addr
);
1135 iowrite8(0x55, ioaddr
->lbal_addr
);
1137 iowrite8(0x55, ioaddr
->nsect_addr
);
1138 iowrite8(0xaa, ioaddr
->lbal_addr
);
1140 nsect
= ioread8(ioaddr
->nsect_addr
);
1141 lbal
= ioread8(ioaddr
->lbal_addr
);
1143 if ((nsect
== 0x55) && (lbal
== 0xaa))
1144 return 1; /* we found a device */
1146 return 0; /* nothing found */
1150 * ata_dev_classify - determine device type based on ATA-spec signature
1151 * @tf: ATA taskfile register set for device to be identified
1153 * Determine from taskfile register contents whether a device is
1154 * ATA or ATAPI, as per "Signature and persistence" section
1155 * of ATA/PI spec (volume 1, sect 5.14).
1161 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, %ATA_DEV_PMP or
1162 * %ATA_DEV_UNKNOWN the event of failure.
1164 unsigned int ata_dev_classify(const struct ata_taskfile
*tf
)
1166 /* Apple's open source Darwin code hints that some devices only
1167 * put a proper signature into the LBA mid/high registers,
1168 * So, we only check those. It's sufficient for uniqueness.
1170 * ATA/ATAPI-7 (d1532v1r1: Feb. 19, 2003) specified separate
1171 * signatures for ATA and ATAPI devices attached on SerialATA,
1172 * 0x3c/0xc3 and 0x69/0x96 respectively. However, SerialATA
1173 * spec has never mentioned about using different signatures
1174 * for ATA/ATAPI devices. Then, Serial ATA II: Port
1175 * Multiplier specification began to use 0x69/0x96 to identify
1176 * port multpliers and 0x3c/0xc3 to identify SEMB device.
1177 * ATA/ATAPI-7 dropped descriptions about 0x3c/0xc3 and
1178 * 0x69/0x96 shortly and described them as reserved for
1181 * We follow the current spec and consider that 0x69/0x96
1182 * identifies a port multiplier and 0x3c/0xc3 a SEMB device.
1184 if ((tf
->lbam
== 0) && (tf
->lbah
== 0)) {
1185 DPRINTK("found ATA device by sig\n");
1189 if ((tf
->lbam
== 0x14) && (tf
->lbah
== 0xeb)) {
1190 DPRINTK("found ATAPI device by sig\n");
1191 return ATA_DEV_ATAPI
;
1194 if ((tf
->lbam
== 0x69) && (tf
->lbah
== 0x96)) {
1195 DPRINTK("found PMP device by sig\n");
1199 if ((tf
->lbam
== 0x3c) && (tf
->lbah
== 0xc3)) {
1200 printk(KERN_INFO
"ata: SEMB device ignored\n");
1201 return ATA_DEV_SEMB_UNSUP
; /* not yet */
1204 DPRINTK("unknown device\n");
1205 return ATA_DEV_UNKNOWN
;
1209 * ata_dev_try_classify - Parse returned ATA device signature
1210 * @dev: ATA device to classify (starting at zero)
1211 * @present: device seems present
1212 * @r_err: Value of error register on completion
1214 * After an event -- SRST, E.D.D., or SATA COMRESET -- occurs,
1215 * an ATA/ATAPI-defined set of values is placed in the ATA
1216 * shadow registers, indicating the results of device detection
1219 * Select the ATA device, and read the values from the ATA shadow
1220 * registers. Then parse according to the Error register value,
1221 * and the spec-defined values examined by ata_dev_classify().
1227 * Device type - %ATA_DEV_ATA, %ATA_DEV_ATAPI or %ATA_DEV_NONE.
1229 unsigned int ata_dev_try_classify(struct ata_device
*dev
, int present
,
1232 struct ata_port
*ap
= dev
->link
->ap
;
1233 struct ata_taskfile tf
;
1237 ap
->ops
->dev_select(ap
, dev
->devno
);
1239 memset(&tf
, 0, sizeof(tf
));
1241 ap
->ops
->tf_read(ap
, &tf
);
1246 /* see if device passed diags: continue and warn later */
1248 /* diagnostic fail : do nothing _YET_ */
1249 dev
->horkage
|= ATA_HORKAGE_DIAGNOSTIC
;
1252 else if ((dev
->devno
== 0) && (err
== 0x81))
1255 return ATA_DEV_NONE
;
1257 /* determine if device is ATA or ATAPI */
1258 class = ata_dev_classify(&tf
);
1260 if (class == ATA_DEV_UNKNOWN
) {
1261 /* If the device failed diagnostic, it's likely to
1262 * have reported incorrect device signature too.
1263 * Assume ATA device if the device seems present but
1264 * device signature is invalid with diagnostic
1267 if (present
&& (dev
->horkage
& ATA_HORKAGE_DIAGNOSTIC
))
1268 class = ATA_DEV_ATA
;
1270 class = ATA_DEV_NONE
;
1271 } else if ((class == ATA_DEV_ATA
) && (ata_chk_status(ap
) == 0))
1272 class = ATA_DEV_NONE
;
1278 * ata_id_string - Convert IDENTIFY DEVICE page into string
1279 * @id: IDENTIFY DEVICE results we will examine
1280 * @s: string into which data is output
1281 * @ofs: offset into identify device page
1282 * @len: length of string to return. must be an even number.
1284 * The strings in the IDENTIFY DEVICE page are broken up into
1285 * 16-bit chunks. Run through the string, and output each
1286 * 8-bit chunk linearly, regardless of platform.
1292 void ata_id_string(const u16
*id
, unsigned char *s
,
1293 unsigned int ofs
, unsigned int len
)
1312 * ata_id_c_string - Convert IDENTIFY DEVICE page into C string
1313 * @id: IDENTIFY DEVICE results we will examine
1314 * @s: string into which data is output
1315 * @ofs: offset into identify device page
1316 * @len: length of string to return. must be an odd number.
1318 * This function is identical to ata_id_string except that it
1319 * trims trailing spaces and terminates the resulting string with
1320 * null. @len must be actual maximum length (even number) + 1.
1325 void ata_id_c_string(const u16
*id
, unsigned char *s
,
1326 unsigned int ofs
, unsigned int len
)
1330 WARN_ON(!(len
& 1));
1332 ata_id_string(id
, s
, ofs
, len
- 1);
1334 p
= s
+ strnlen(s
, len
- 1);
1335 while (p
> s
&& p
[-1] == ' ')
1340 static u64
ata_id_n_sectors(const u16
*id
)
1342 if (ata_id_has_lba(id
)) {
1343 if (ata_id_has_lba48(id
))
1344 return ata_id_u64(id
, 100);
1346 return ata_id_u32(id
, 60);
1348 if (ata_id_current_chs_valid(id
))
1349 return ata_id_u32(id
, 57);
1351 return id
[1] * id
[3] * id
[6];
1355 static u64
ata_tf_to_lba48(struct ata_taskfile
*tf
)
1359 sectors
|= ((u64
)(tf
->hob_lbah
& 0xff)) << 40;
1360 sectors
|= ((u64
)(tf
->hob_lbam
& 0xff)) << 32;
1361 sectors
|= (tf
->hob_lbal
& 0xff) << 24;
1362 sectors
|= (tf
->lbah
& 0xff) << 16;
1363 sectors
|= (tf
->lbam
& 0xff) << 8;
1364 sectors
|= (tf
->lbal
& 0xff);
1369 static u64
ata_tf_to_lba(struct ata_taskfile
*tf
)
1373 sectors
|= (tf
->device
& 0x0f) << 24;
1374 sectors
|= (tf
->lbah
& 0xff) << 16;
1375 sectors
|= (tf
->lbam
& 0xff) << 8;
1376 sectors
|= (tf
->lbal
& 0xff);
1382 * ata_read_native_max_address - Read native max address
1383 * @dev: target device
1384 * @max_sectors: out parameter for the result native max address
1386 * Perform an LBA48 or LBA28 native size query upon the device in
1390 * 0 on success, -EACCES if command is aborted by the drive.
1391 * -EIO on other errors.
1393 static int ata_read_native_max_address(struct ata_device
*dev
, u64
*max_sectors
)
1395 unsigned int err_mask
;
1396 struct ata_taskfile tf
;
1397 int lba48
= ata_id_has_lba48(dev
->id
);
1399 ata_tf_init(dev
, &tf
);
1401 /* always clear all address registers */
1402 tf
.flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
1405 tf
.command
= ATA_CMD_READ_NATIVE_MAX_EXT
;
1406 tf
.flags
|= ATA_TFLAG_LBA48
;
1408 tf
.command
= ATA_CMD_READ_NATIVE_MAX
;
1410 tf
.protocol
|= ATA_PROT_NODATA
;
1411 tf
.device
|= ATA_LBA
;
1413 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
1415 ata_dev_printk(dev
, KERN_WARNING
, "failed to read native "
1416 "max address (err_mask=0x%x)\n", err_mask
);
1417 if (err_mask
== AC_ERR_DEV
&& (tf
.feature
& ATA_ABORTED
))
1423 *max_sectors
= ata_tf_to_lba48(&tf
);
1425 *max_sectors
= ata_tf_to_lba(&tf
);
1426 if (dev
->horkage
& ATA_HORKAGE_HPA_SIZE
)
1432 * ata_set_max_sectors - Set max sectors
1433 * @dev: target device
1434 * @new_sectors: new max sectors value to set for the device
1436 * Set max sectors of @dev to @new_sectors.
1439 * 0 on success, -EACCES if command is aborted or denied (due to
1440 * previous non-volatile SET_MAX) by the drive. -EIO on other
1443 static int ata_set_max_sectors(struct ata_device
*dev
, u64 new_sectors
)
1445 unsigned int err_mask
;
1446 struct ata_taskfile tf
;
1447 int lba48
= ata_id_has_lba48(dev
->id
);
1451 ata_tf_init(dev
, &tf
);
1453 tf
.flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
1456 tf
.command
= ATA_CMD_SET_MAX_EXT
;
1457 tf
.flags
|= ATA_TFLAG_LBA48
;
1459 tf
.hob_lbal
= (new_sectors
>> 24) & 0xff;
1460 tf
.hob_lbam
= (new_sectors
>> 32) & 0xff;
1461 tf
.hob_lbah
= (new_sectors
>> 40) & 0xff;
1463 tf
.command
= ATA_CMD_SET_MAX
;
1465 tf
.device
|= (new_sectors
>> 24) & 0xf;
1468 tf
.protocol
|= ATA_PROT_NODATA
;
1469 tf
.device
|= ATA_LBA
;
1471 tf
.lbal
= (new_sectors
>> 0) & 0xff;
1472 tf
.lbam
= (new_sectors
>> 8) & 0xff;
1473 tf
.lbah
= (new_sectors
>> 16) & 0xff;
1475 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
1477 ata_dev_printk(dev
, KERN_WARNING
, "failed to set "
1478 "max address (err_mask=0x%x)\n", err_mask
);
1479 if (err_mask
== AC_ERR_DEV
&&
1480 (tf
.feature
& (ATA_ABORTED
| ATA_IDNF
)))
1489 * ata_hpa_resize - Resize a device with an HPA set
1490 * @dev: Device to resize
1492 * Read the size of an LBA28 or LBA48 disk with HPA features and resize
1493 * it if required to the full size of the media. The caller must check
1494 * the drive has the HPA feature set enabled.
1497 * 0 on success, -errno on failure.
1499 static int ata_hpa_resize(struct ata_device
*dev
)
1501 struct ata_eh_context
*ehc
= &dev
->link
->eh_context
;
1502 int print_info
= ehc
->i
.flags
& ATA_EHI_PRINTINFO
;
1503 u64 sectors
= ata_id_n_sectors(dev
->id
);
1507 /* do we need to do it? */
1508 if (dev
->class != ATA_DEV_ATA
||
1509 !ata_id_has_lba(dev
->id
) || !ata_id_hpa_enabled(dev
->id
) ||
1510 (dev
->horkage
& ATA_HORKAGE_BROKEN_HPA
))
1513 /* read native max address */
1514 rc
= ata_read_native_max_address(dev
, &native_sectors
);
1516 /* If device aborted the command or HPA isn't going to
1517 * be unlocked, skip HPA resizing.
1519 if (rc
== -EACCES
|| !ata_ignore_hpa
) {
1520 ata_dev_printk(dev
, KERN_WARNING
, "HPA support seems "
1521 "broken, skipping HPA handling\n");
1522 dev
->horkage
|= ATA_HORKAGE_BROKEN_HPA
;
1524 /* we can continue if device aborted the command */
1532 /* nothing to do? */
1533 if (native_sectors
<= sectors
|| !ata_ignore_hpa
) {
1534 if (!print_info
|| native_sectors
== sectors
)
1537 if (native_sectors
> sectors
)
1538 ata_dev_printk(dev
, KERN_INFO
,
1539 "HPA detected: current %llu, native %llu\n",
1540 (unsigned long long)sectors
,
1541 (unsigned long long)native_sectors
);
1542 else if (native_sectors
< sectors
)
1543 ata_dev_printk(dev
, KERN_WARNING
,
1544 "native sectors (%llu) is smaller than "
1546 (unsigned long long)native_sectors
,
1547 (unsigned long long)sectors
);
1551 /* let's unlock HPA */
1552 rc
= ata_set_max_sectors(dev
, native_sectors
);
1553 if (rc
== -EACCES
) {
1554 /* if device aborted the command, skip HPA resizing */
1555 ata_dev_printk(dev
, KERN_WARNING
, "device aborted resize "
1556 "(%llu -> %llu), skipping HPA handling\n",
1557 (unsigned long long)sectors
,
1558 (unsigned long long)native_sectors
);
1559 dev
->horkage
|= ATA_HORKAGE_BROKEN_HPA
;
1564 /* re-read IDENTIFY data */
1565 rc
= ata_dev_reread_id(dev
, 0);
1567 ata_dev_printk(dev
, KERN_ERR
, "failed to re-read IDENTIFY "
1568 "data after HPA resizing\n");
1573 u64 new_sectors
= ata_id_n_sectors(dev
->id
);
1574 ata_dev_printk(dev
, KERN_INFO
,
1575 "HPA unlocked: %llu -> %llu, native %llu\n",
1576 (unsigned long long)sectors
,
1577 (unsigned long long)new_sectors
,
1578 (unsigned long long)native_sectors
);
1585 * ata_noop_dev_select - Select device 0/1 on ATA bus
1586 * @ap: ATA channel to manipulate
1587 * @device: ATA device (numbered from zero) to select
1589 * This function performs no actual function.
1591 * May be used as the dev_select() entry in ata_port_operations.
1596 void ata_noop_dev_select(struct ata_port
*ap
, unsigned int device
)
1602 * ata_std_dev_select - Select device 0/1 on ATA bus
1603 * @ap: ATA channel to manipulate
1604 * @device: ATA device (numbered from zero) to select
1606 * Use the method defined in the ATA specification to
1607 * make either device 0, or device 1, active on the
1608 * ATA channel. Works with both PIO and MMIO.
1610 * May be used as the dev_select() entry in ata_port_operations.
1616 void ata_std_dev_select(struct ata_port
*ap
, unsigned int device
)
1621 tmp
= ATA_DEVICE_OBS
;
1623 tmp
= ATA_DEVICE_OBS
| ATA_DEV1
;
1625 iowrite8(tmp
, ap
->ioaddr
.device_addr
);
1626 ata_pause(ap
); /* needed; also flushes, for mmio */
1630 * ata_dev_select - Select device 0/1 on ATA bus
1631 * @ap: ATA channel to manipulate
1632 * @device: ATA device (numbered from zero) to select
1633 * @wait: non-zero to wait for Status register BSY bit to clear
1634 * @can_sleep: non-zero if context allows sleeping
1636 * Use the method defined in the ATA specification to
1637 * make either device 0, or device 1, active on the
1640 * This is a high-level version of ata_std_dev_select(),
1641 * which additionally provides the services of inserting
1642 * the proper pauses and status polling, where needed.
1648 void ata_dev_select(struct ata_port
*ap
, unsigned int device
,
1649 unsigned int wait
, unsigned int can_sleep
)
1651 if (ata_msg_probe(ap
))
1652 ata_port_printk(ap
, KERN_INFO
, "ata_dev_select: ENTER, "
1653 "device %u, wait %u\n", device
, wait
);
1658 ap
->ops
->dev_select(ap
, device
);
1661 if (can_sleep
&& ap
->link
.device
[device
].class == ATA_DEV_ATAPI
)
1668 * ata_dump_id - IDENTIFY DEVICE info debugging output
1669 * @id: IDENTIFY DEVICE page to dump
1671 * Dump selected 16-bit words from the given IDENTIFY DEVICE
1678 static inline void ata_dump_id(const u16
*id
)
1680 DPRINTK("49==0x%04x "
1690 DPRINTK("80==0x%04x "
1700 DPRINTK("88==0x%04x "
1707 * ata_id_xfermask - Compute xfermask from the given IDENTIFY data
1708 * @id: IDENTIFY data to compute xfer mask from
1710 * Compute the xfermask for this device. This is not as trivial
1711 * as it seems if we must consider early devices correctly.
1713 * FIXME: pre IDE drive timing (do we care ?).
1721 unsigned long ata_id_xfermask(const u16
*id
)
1723 unsigned long pio_mask
, mwdma_mask
, udma_mask
;
1725 /* Usual case. Word 53 indicates word 64 is valid */
1726 if (id
[ATA_ID_FIELD_VALID
] & (1 << 1)) {
1727 pio_mask
= id
[ATA_ID_PIO_MODES
] & 0x03;
1731 /* If word 64 isn't valid then Word 51 high byte holds
1732 * the PIO timing number for the maximum. Turn it into
1735 u8 mode
= (id
[ATA_ID_OLD_PIO_MODES
] >> 8) & 0xFF;
1736 if (mode
< 5) /* Valid PIO range */
1737 pio_mask
= (2 << mode
) - 1;
1741 /* But wait.. there's more. Design your standards by
1742 * committee and you too can get a free iordy field to
1743 * process. However its the speeds not the modes that
1744 * are supported... Note drivers using the timing API
1745 * will get this right anyway
1749 mwdma_mask
= id
[ATA_ID_MWDMA_MODES
] & 0x07;
1751 if (ata_id_is_cfa(id
)) {
1753 * Process compact flash extended modes
1755 int pio
= id
[163] & 0x7;
1756 int dma
= (id
[163] >> 3) & 7;
1759 pio_mask
|= (1 << 5);
1761 pio_mask
|= (1 << 6);
1763 mwdma_mask
|= (1 << 3);
1765 mwdma_mask
|= (1 << 4);
1769 if (id
[ATA_ID_FIELD_VALID
] & (1 << 2))
1770 udma_mask
= id
[ATA_ID_UDMA_MODES
] & 0xff;
1772 return ata_pack_xfermask(pio_mask
, mwdma_mask
, udma_mask
);
1776 * ata_pio_queue_task - Queue port_task
1777 * @ap: The ata_port to queue port_task for
1778 * @fn: workqueue function to be scheduled
1779 * @data: data for @fn to use
1780 * @delay: delay time for workqueue function
1782 * Schedule @fn(@data) for execution after @delay jiffies using
1783 * port_task. There is one port_task per port and it's the
1784 * user(low level driver)'s responsibility to make sure that only
1785 * one task is active at any given time.
1787 * libata core layer takes care of synchronization between
1788 * port_task and EH. ata_pio_queue_task() may be ignored for EH
1792 * Inherited from caller.
1794 static void ata_pio_queue_task(struct ata_port
*ap
, void *data
,
1795 unsigned long delay
)
1797 ap
->port_task_data
= data
;
1799 /* may fail if ata_port_flush_task() in progress */
1800 queue_delayed_work(ata_wq
, &ap
->port_task
, delay
);
1804 * ata_port_flush_task - Flush port_task
1805 * @ap: The ata_port to flush port_task for
1807 * After this function completes, port_task is guranteed not to
1808 * be running or scheduled.
1811 * Kernel thread context (may sleep)
1813 void ata_port_flush_task(struct ata_port
*ap
)
1817 cancel_rearming_delayed_work(&ap
->port_task
);
1819 if (ata_msg_ctl(ap
))
1820 ata_port_printk(ap
, KERN_DEBUG
, "%s: EXIT\n", __func__
);
1823 static void ata_qc_complete_internal(struct ata_queued_cmd
*qc
)
1825 struct completion
*waiting
= qc
->private_data
;
1831 * ata_exec_internal_sg - execute libata internal command
1832 * @dev: Device to which the command is sent
1833 * @tf: Taskfile registers for the command and the result
1834 * @cdb: CDB for packet command
1835 * @dma_dir: Data tranfer direction of the command
1836 * @sgl: sg list for the data buffer of the command
1837 * @n_elem: Number of sg entries
1838 * @timeout: Timeout in msecs (0 for default)
1840 * Executes libata internal command with timeout. @tf contains
1841 * command on entry and result on return. Timeout and error
1842 * conditions are reported via return value. No recovery action
1843 * is taken after a command times out. It's caller's duty to
1844 * clean up after timeout.
1847 * None. Should be called with kernel context, might sleep.
1850 * Zero on success, AC_ERR_* mask on failure
1852 unsigned ata_exec_internal_sg(struct ata_device
*dev
,
1853 struct ata_taskfile
*tf
, const u8
*cdb
,
1854 int dma_dir
, struct scatterlist
*sgl
,
1855 unsigned int n_elem
, unsigned long timeout
)
1857 struct ata_link
*link
= dev
->link
;
1858 struct ata_port
*ap
= link
->ap
;
1859 u8 command
= tf
->command
;
1860 struct ata_queued_cmd
*qc
;
1861 unsigned int tag
, preempted_tag
;
1862 u32 preempted_sactive
, preempted_qc_active
;
1863 int preempted_nr_active_links
;
1864 DECLARE_COMPLETION_ONSTACK(wait
);
1865 unsigned long flags
;
1866 unsigned int err_mask
;
1869 spin_lock_irqsave(ap
->lock
, flags
);
1871 /* no internal command while frozen */
1872 if (ap
->pflags
& ATA_PFLAG_FROZEN
) {
1873 spin_unlock_irqrestore(ap
->lock
, flags
);
1874 return AC_ERR_SYSTEM
;
1877 /* initialize internal qc */
1879 /* XXX: Tag 0 is used for drivers with legacy EH as some
1880 * drivers choke if any other tag is given. This breaks
1881 * ata_tag_internal() test for those drivers. Don't use new
1882 * EH stuff without converting to it.
1884 if (ap
->ops
->error_handler
)
1885 tag
= ATA_TAG_INTERNAL
;
1889 if (test_and_set_bit(tag
, &ap
->qc_allocated
))
1891 qc
= __ata_qc_from_tag(ap
, tag
);
1899 preempted_tag
= link
->active_tag
;
1900 preempted_sactive
= link
->sactive
;
1901 preempted_qc_active
= ap
->qc_active
;
1902 preempted_nr_active_links
= ap
->nr_active_links
;
1903 link
->active_tag
= ATA_TAG_POISON
;
1906 ap
->nr_active_links
= 0;
1908 /* prepare & issue qc */
1911 memcpy(qc
->cdb
, cdb
, ATAPI_CDB_LEN
);
1912 qc
->flags
|= ATA_QCFLAG_RESULT_TF
;
1913 qc
->dma_dir
= dma_dir
;
1914 if (dma_dir
!= DMA_NONE
) {
1915 unsigned int i
, buflen
= 0;
1916 struct scatterlist
*sg
;
1918 for_each_sg(sgl
, sg
, n_elem
, i
)
1919 buflen
+= sg
->length
;
1921 ata_sg_init(qc
, sgl
, n_elem
);
1922 qc
->nbytes
= buflen
;
1925 qc
->private_data
= &wait
;
1926 qc
->complete_fn
= ata_qc_complete_internal
;
1930 spin_unlock_irqrestore(ap
->lock
, flags
);
1933 timeout
= ata_probe_timeout
* 1000 / HZ
;
1935 rc
= wait_for_completion_timeout(&wait
, msecs_to_jiffies(timeout
));
1937 ata_port_flush_task(ap
);
1940 spin_lock_irqsave(ap
->lock
, flags
);
1942 /* We're racing with irq here. If we lose, the
1943 * following test prevents us from completing the qc
1944 * twice. If we win, the port is frozen and will be
1945 * cleaned up by ->post_internal_cmd().
1947 if (qc
->flags
& ATA_QCFLAG_ACTIVE
) {
1948 qc
->err_mask
|= AC_ERR_TIMEOUT
;
1950 if (ap
->ops
->error_handler
)
1951 ata_port_freeze(ap
);
1953 ata_qc_complete(qc
);
1955 if (ata_msg_warn(ap
))
1956 ata_dev_printk(dev
, KERN_WARNING
,
1957 "qc timeout (cmd 0x%x)\n", command
);
1960 spin_unlock_irqrestore(ap
->lock
, flags
);
1963 /* do post_internal_cmd */
1964 if (ap
->ops
->post_internal_cmd
)
1965 ap
->ops
->post_internal_cmd(qc
);
1967 /* perform minimal error analysis */
1968 if (qc
->flags
& ATA_QCFLAG_FAILED
) {
1969 if (qc
->result_tf
.command
& (ATA_ERR
| ATA_DF
))
1970 qc
->err_mask
|= AC_ERR_DEV
;
1973 qc
->err_mask
|= AC_ERR_OTHER
;
1975 if (qc
->err_mask
& ~AC_ERR_OTHER
)
1976 qc
->err_mask
&= ~AC_ERR_OTHER
;
1980 spin_lock_irqsave(ap
->lock
, flags
);
1982 *tf
= qc
->result_tf
;
1983 err_mask
= qc
->err_mask
;
1986 link
->active_tag
= preempted_tag
;
1987 link
->sactive
= preempted_sactive
;
1988 ap
->qc_active
= preempted_qc_active
;
1989 ap
->nr_active_links
= preempted_nr_active_links
;
1991 /* XXX - Some LLDDs (sata_mv) disable port on command failure.
1992 * Until those drivers are fixed, we detect the condition
1993 * here, fail the command with AC_ERR_SYSTEM and reenable the
1996 * Note that this doesn't change any behavior as internal
1997 * command failure results in disabling the device in the
1998 * higher layer for LLDDs without new reset/EH callbacks.
2000 * Kill the following code as soon as those drivers are fixed.
2002 if (ap
->flags
& ATA_FLAG_DISABLED
) {
2003 err_mask
|= AC_ERR_SYSTEM
;
2007 spin_unlock_irqrestore(ap
->lock
, flags
);
2013 * ata_exec_internal - execute libata internal command
2014 * @dev: Device to which the command is sent
2015 * @tf: Taskfile registers for the command and the result
2016 * @cdb: CDB for packet command
2017 * @dma_dir: Data tranfer direction of the command
2018 * @buf: Data buffer of the command
2019 * @buflen: Length of data buffer
2020 * @timeout: Timeout in msecs (0 for default)
2022 * Wrapper around ata_exec_internal_sg() which takes simple
2023 * buffer instead of sg list.
2026 * None. Should be called with kernel context, might sleep.
2029 * Zero on success, AC_ERR_* mask on failure
2031 unsigned ata_exec_internal(struct ata_device
*dev
,
2032 struct ata_taskfile
*tf
, const u8
*cdb
,
2033 int dma_dir
, void *buf
, unsigned int buflen
,
2034 unsigned long timeout
)
2036 struct scatterlist
*psg
= NULL
, sg
;
2037 unsigned int n_elem
= 0;
2039 if (dma_dir
!= DMA_NONE
) {
2041 sg_init_one(&sg
, buf
, buflen
);
2046 return ata_exec_internal_sg(dev
, tf
, cdb
, dma_dir
, psg
, n_elem
,
2051 * ata_do_simple_cmd - execute simple internal command
2052 * @dev: Device to which the command is sent
2053 * @cmd: Opcode to execute
2055 * Execute a 'simple' command, that only consists of the opcode
2056 * 'cmd' itself, without filling any other registers
2059 * Kernel thread context (may sleep).
2062 * Zero on success, AC_ERR_* mask on failure
2064 unsigned int ata_do_simple_cmd(struct ata_device
*dev
, u8 cmd
)
2066 struct ata_taskfile tf
;
2068 ata_tf_init(dev
, &tf
);
2071 tf
.flags
|= ATA_TFLAG_DEVICE
;
2072 tf
.protocol
= ATA_PROT_NODATA
;
2074 return ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
2078 * ata_pio_need_iordy - check if iordy needed
2081 * Check if the current speed of the device requires IORDY. Used
2082 * by various controllers for chip configuration.
2085 unsigned int ata_pio_need_iordy(const struct ata_device
*adev
)
2087 /* Controller doesn't support IORDY. Probably a pointless check
2088 as the caller should know this */
2089 if (adev
->link
->ap
->flags
& ATA_FLAG_NO_IORDY
)
2091 /* PIO3 and higher it is mandatory */
2092 if (adev
->pio_mode
> XFER_PIO_2
)
2094 /* We turn it on when possible */
2095 if (ata_id_has_iordy(adev
->id
))
2101 * ata_pio_mask_no_iordy - Return the non IORDY mask
2104 * Compute the highest mode possible if we are not using iordy. Return
2105 * -1 if no iordy mode is available.
2108 static u32
ata_pio_mask_no_iordy(const struct ata_device
*adev
)
2110 /* If we have no drive specific rule, then PIO 2 is non IORDY */
2111 if (adev
->id
[ATA_ID_FIELD_VALID
] & 2) { /* EIDE */
2112 u16 pio
= adev
->id
[ATA_ID_EIDE_PIO
];
2113 /* Is the speed faster than the drive allows non IORDY ? */
2115 /* This is cycle times not frequency - watch the logic! */
2116 if (pio
> 240) /* PIO2 is 240nS per cycle */
2117 return 3 << ATA_SHIFT_PIO
;
2118 return 7 << ATA_SHIFT_PIO
;
2121 return 3 << ATA_SHIFT_PIO
;
2125 * ata_dev_read_id - Read ID data from the specified device
2126 * @dev: target device
2127 * @p_class: pointer to class of the target device (may be changed)
2128 * @flags: ATA_READID_* flags
2129 * @id: buffer to read IDENTIFY data into
2131 * Read ID data from the specified device. ATA_CMD_ID_ATA is
2132 * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
2133 * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS
2134 * for pre-ATA4 drives.
2136 * FIXME: ATA_CMD_ID_ATA is optional for early drives and right
2137 * now we abort if we hit that case.
2140 * Kernel thread context (may sleep)
2143 * 0 on success, -errno otherwise.
2145 int ata_dev_read_id(struct ata_device
*dev
, unsigned int *p_class
,
2146 unsigned int flags
, u16
*id
)
2148 struct ata_port
*ap
= dev
->link
->ap
;
2149 unsigned int class = *p_class
;
2150 struct ata_taskfile tf
;
2151 unsigned int err_mask
= 0;
2153 int may_fallback
= 1, tried_spinup
= 0;
2156 if (ata_msg_ctl(ap
))
2157 ata_dev_printk(dev
, KERN_DEBUG
, "%s: ENTER\n", __func__
);
2160 ata_tf_init(dev
, &tf
);
2164 tf
.command
= ATA_CMD_ID_ATA
;
2167 tf
.command
= ATA_CMD_ID_ATAPI
;
2171 reason
= "unsupported class";
2175 tf
.protocol
= ATA_PROT_PIO
;
2177 /* Some devices choke if TF registers contain garbage. Make
2178 * sure those are properly initialized.
2180 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
2182 /* Device presence detection is unreliable on some
2183 * controllers. Always poll IDENTIFY if available.
2185 tf
.flags
|= ATA_TFLAG_POLLING
;
2187 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_FROM_DEVICE
,
2188 id
, sizeof(id
[0]) * ATA_ID_WORDS
, 0);
2190 if (err_mask
& AC_ERR_NODEV_HINT
) {
2191 ata_dev_printk(dev
, KERN_DEBUG
,
2192 "NODEV after polling detection\n");
2196 if ((err_mask
== AC_ERR_DEV
) && (tf
.feature
& ATA_ABORTED
)) {
2197 /* Device or controller might have reported
2198 * the wrong device class. Give a shot at the
2199 * other IDENTIFY if the current one is
2200 * aborted by the device.
2205 if (class == ATA_DEV_ATA
)
2206 class = ATA_DEV_ATAPI
;
2208 class = ATA_DEV_ATA
;
2212 /* Control reaches here iff the device aborted
2213 * both flavors of IDENTIFYs which happens
2214 * sometimes with phantom devices.
2216 ata_dev_printk(dev
, KERN_DEBUG
,
2217 "both IDENTIFYs aborted, assuming NODEV\n");
2222 reason
= "I/O error";
2226 /* Falling back doesn't make sense if ID data was read
2227 * successfully at least once.
2231 swap_buf_le16(id
, ATA_ID_WORDS
);
2235 reason
= "device reports invalid type";
2237 if (class == ATA_DEV_ATA
) {
2238 if (!ata_id_is_ata(id
) && !ata_id_is_cfa(id
))
2241 if (ata_id_is_ata(id
))
2245 if (!tried_spinup
&& (id
[2] == 0x37c8 || id
[2] == 0x738c)) {
2248 * Drive powered-up in standby mode, and requires a specific
2249 * SET_FEATURES spin-up subcommand before it will accept
2250 * anything other than the original IDENTIFY command.
2252 err_mask
= ata_dev_set_feature(dev
, SETFEATURES_SPINUP
, 0);
2253 if (err_mask
&& id
[2] != 0x738c) {
2255 reason
= "SPINUP failed";
2259 * If the drive initially returned incomplete IDENTIFY info,
2260 * we now must reissue the IDENTIFY command.
2262 if (id
[2] == 0x37c8)
2266 if ((flags
& ATA_READID_POSTRESET
) && class == ATA_DEV_ATA
) {
2268 * The exact sequence expected by certain pre-ATA4 drives is:
2270 * IDENTIFY (optional in early ATA)
2271 * INITIALIZE DEVICE PARAMETERS (later IDE and ATA)
2273 * Some drives were very specific about that exact sequence.
2275 * Note that ATA4 says lba is mandatory so the second check
2276 * shoud never trigger.
2278 if (ata_id_major_version(id
) < 4 || !ata_id_has_lba(id
)) {
2279 err_mask
= ata_dev_init_params(dev
, id
[3], id
[6]);
2282 reason
= "INIT_DEV_PARAMS failed";
2286 /* current CHS translation info (id[53-58]) might be
2287 * changed. reread the identify device info.
2289 flags
&= ~ATA_READID_POSTRESET
;
2299 if (ata_msg_warn(ap
))
2300 ata_dev_printk(dev
, KERN_WARNING
, "failed to IDENTIFY "
2301 "(%s, err_mask=0x%x)\n", reason
, err_mask
);
2305 static inline u8
ata_dev_knobble(struct ata_device
*dev
)
2307 struct ata_port
*ap
= dev
->link
->ap
;
2308 return ((ap
->cbl
== ATA_CBL_SATA
) && (!ata_id_is_sata(dev
->id
)));
2311 static void ata_dev_config_ncq(struct ata_device
*dev
,
2312 char *desc
, size_t desc_sz
)
2314 struct ata_port
*ap
= dev
->link
->ap
;
2315 int hdepth
= 0, ddepth
= ata_id_queue_depth(dev
->id
);
2317 if (!ata_id_has_ncq(dev
->id
)) {
2321 if (dev
->horkage
& ATA_HORKAGE_NONCQ
) {
2322 snprintf(desc
, desc_sz
, "NCQ (not used)");
2325 if (ap
->flags
& ATA_FLAG_NCQ
) {
2326 hdepth
= min(ap
->scsi_host
->can_queue
, ATA_MAX_QUEUE
- 1);
2327 dev
->flags
|= ATA_DFLAG_NCQ
;
2330 if (hdepth
>= ddepth
)
2331 snprintf(desc
, desc_sz
, "NCQ (depth %d)", ddepth
);
2333 snprintf(desc
, desc_sz
, "NCQ (depth %d/%d)", hdepth
, ddepth
);
2337 * ata_dev_configure - Configure the specified ATA/ATAPI device
2338 * @dev: Target device to configure
2340 * Configure @dev according to @dev->id. Generic and low-level
2341 * driver specific fixups are also applied.
2344 * Kernel thread context (may sleep)
2347 * 0 on success, -errno otherwise
2349 int ata_dev_configure(struct ata_device
*dev
)
2351 struct ata_port
*ap
= dev
->link
->ap
;
2352 struct ata_eh_context
*ehc
= &dev
->link
->eh_context
;
2353 int print_info
= ehc
->i
.flags
& ATA_EHI_PRINTINFO
;
2354 const u16
*id
= dev
->id
;
2355 unsigned long xfer_mask
;
2356 char revbuf
[7]; /* XYZ-99\0 */
2357 char fwrevbuf
[ATA_ID_FW_REV_LEN
+1];
2358 char modelbuf
[ATA_ID_PROD_LEN
+1];
2361 if (!ata_dev_enabled(dev
) && ata_msg_info(ap
)) {
2362 ata_dev_printk(dev
, KERN_INFO
, "%s: ENTER/EXIT -- nodev\n",
2367 if (ata_msg_probe(ap
))
2368 ata_dev_printk(dev
, KERN_DEBUG
, "%s: ENTER\n", __func__
);
2371 dev
->horkage
|= ata_dev_blacklisted(dev
);
2372 ata_force_horkage(dev
);
2374 /* let ACPI work its magic */
2375 rc
= ata_acpi_on_devcfg(dev
);
2379 /* massage HPA, do it early as it might change IDENTIFY data */
2380 rc
= ata_hpa_resize(dev
);
2384 /* print device capabilities */
2385 if (ata_msg_probe(ap
))
2386 ata_dev_printk(dev
, KERN_DEBUG
,
2387 "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x "
2388 "85:%04x 86:%04x 87:%04x 88:%04x\n",
2390 id
[49], id
[82], id
[83], id
[84],
2391 id
[85], id
[86], id
[87], id
[88]);
2393 /* initialize to-be-configured parameters */
2394 dev
->flags
&= ~ATA_DFLAG_CFG_MASK
;
2395 dev
->max_sectors
= 0;
2403 * common ATA, ATAPI feature tests
2406 /* find max transfer mode; for printk only */
2407 xfer_mask
= ata_id_xfermask(id
);
2409 if (ata_msg_probe(ap
))
2412 /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */
2413 ata_id_c_string(dev
->id
, fwrevbuf
, ATA_ID_FW_REV
,
2416 ata_id_c_string(dev
->id
, modelbuf
, ATA_ID_PROD
,
2419 /* ATA-specific feature tests */
2420 if (dev
->class == ATA_DEV_ATA
) {
2421 if (ata_id_is_cfa(id
)) {
2422 if (id
[162] & 1) /* CPRM may make this media unusable */
2423 ata_dev_printk(dev
, KERN_WARNING
,
2424 "supports DRM functions and may "
2425 "not be fully accessable.\n");
2426 snprintf(revbuf
, 7, "CFA");
2428 snprintf(revbuf
, 7, "ATA-%d", ata_id_major_version(id
));
2429 /* Warn the user if the device has TPM extensions */
2430 if (ata_id_has_tpm(id
))
2431 ata_dev_printk(dev
, KERN_WARNING
,
2432 "supports DRM functions and may "
2433 "not be fully accessable.\n");
2436 dev
->n_sectors
= ata_id_n_sectors(id
);
2438 if (dev
->id
[59] & 0x100)
2439 dev
->multi_count
= dev
->id
[59] & 0xff;
2441 if (ata_id_has_lba(id
)) {
2442 const char *lba_desc
;
2446 dev
->flags
|= ATA_DFLAG_LBA
;
2447 if (ata_id_has_lba48(id
)) {
2448 dev
->flags
|= ATA_DFLAG_LBA48
;
2451 if (dev
->n_sectors
>= (1UL << 28) &&
2452 ata_id_has_flush_ext(id
))
2453 dev
->flags
|= ATA_DFLAG_FLUSH_EXT
;
2457 ata_dev_config_ncq(dev
, ncq_desc
, sizeof(ncq_desc
));
2459 /* print device info to dmesg */
2460 if (ata_msg_drv(ap
) && print_info
) {
2461 ata_dev_printk(dev
, KERN_INFO
,
2462 "%s: %s, %s, max %s\n",
2463 revbuf
, modelbuf
, fwrevbuf
,
2464 ata_mode_string(xfer_mask
));
2465 ata_dev_printk(dev
, KERN_INFO
,
2466 "%Lu sectors, multi %u: %s %s\n",
2467 (unsigned long long)dev
->n_sectors
,
2468 dev
->multi_count
, lba_desc
, ncq_desc
);
2473 /* Default translation */
2474 dev
->cylinders
= id
[1];
2476 dev
->sectors
= id
[6];
2478 if (ata_id_current_chs_valid(id
)) {
2479 /* Current CHS translation is valid. */
2480 dev
->cylinders
= id
[54];
2481 dev
->heads
= id
[55];
2482 dev
->sectors
= id
[56];
2485 /* print device info to dmesg */
2486 if (ata_msg_drv(ap
) && print_info
) {
2487 ata_dev_printk(dev
, KERN_INFO
,
2488 "%s: %s, %s, max %s\n",
2489 revbuf
, modelbuf
, fwrevbuf
,
2490 ata_mode_string(xfer_mask
));
2491 ata_dev_printk(dev
, KERN_INFO
,
2492 "%Lu sectors, multi %u, CHS %u/%u/%u\n",
2493 (unsigned long long)dev
->n_sectors
,
2494 dev
->multi_count
, dev
->cylinders
,
2495 dev
->heads
, dev
->sectors
);
2502 /* ATAPI-specific feature tests */
2503 else if (dev
->class == ATA_DEV_ATAPI
) {
2504 const char *cdb_intr_string
= "";
2505 const char *atapi_an_string
= "";
2506 const char *dma_dir_string
= "";
2509 rc
= atapi_cdb_len(id
);
2510 if ((rc
< 12) || (rc
> ATAPI_CDB_LEN
)) {
2511 if (ata_msg_warn(ap
))
2512 ata_dev_printk(dev
, KERN_WARNING
,
2513 "unsupported CDB len\n");
2517 dev
->cdb_len
= (unsigned int) rc
;
2519 /* Enable ATAPI AN if both the host and device have
2520 * the support. If PMP is attached, SNTF is required
2521 * to enable ATAPI AN to discern between PHY status
2522 * changed notifications and ATAPI ANs.
2524 if ((ap
->flags
& ATA_FLAG_AN
) && ata_id_has_atapi_AN(id
) &&
2525 (!ap
->nr_pmp_links
||
2526 sata_scr_read(&ap
->link
, SCR_NOTIFICATION
, &sntf
) == 0)) {
2527 unsigned int err_mask
;
2529 /* issue SET feature command to turn this on */
2530 err_mask
= ata_dev_set_feature(dev
,
2531 SETFEATURES_SATA_ENABLE
, SATA_AN
);
2533 ata_dev_printk(dev
, KERN_ERR
,
2534 "failed to enable ATAPI AN "
2535 "(err_mask=0x%x)\n", err_mask
);
2537 dev
->flags
|= ATA_DFLAG_AN
;
2538 atapi_an_string
= ", ATAPI AN";
2542 if (ata_id_cdb_intr(dev
->id
)) {
2543 dev
->flags
|= ATA_DFLAG_CDB_INTR
;
2544 cdb_intr_string
= ", CDB intr";
2547 if (atapi_dmadir
|| atapi_id_dmadir(dev
->id
)) {
2548 dev
->flags
|= ATA_DFLAG_DMADIR
;
2549 dma_dir_string
= ", DMADIR";
2552 /* print device info to dmesg */
2553 if (ata_msg_drv(ap
) && print_info
)
2554 ata_dev_printk(dev
, KERN_INFO
,
2555 "ATAPI: %s, %s, max %s%s%s%s\n",
2557 ata_mode_string(xfer_mask
),
2558 cdb_intr_string
, atapi_an_string
,
2562 /* determine max_sectors */
2563 dev
->max_sectors
= ATA_MAX_SECTORS
;
2564 if (dev
->flags
& ATA_DFLAG_LBA48
)
2565 dev
->max_sectors
= ATA_MAX_SECTORS_LBA48
;
2567 if (!(dev
->horkage
& ATA_HORKAGE_IPM
)) {
2568 if (ata_id_has_hipm(dev
->id
))
2569 dev
->flags
|= ATA_DFLAG_HIPM
;
2570 if (ata_id_has_dipm(dev
->id
))
2571 dev
->flags
|= ATA_DFLAG_DIPM
;
2574 /* Limit PATA drive on SATA cable bridge transfers to udma5,
2576 if (ata_dev_knobble(dev
)) {
2577 if (ata_msg_drv(ap
) && print_info
)
2578 ata_dev_printk(dev
, KERN_INFO
,
2579 "applying bridge limits\n");
2580 dev
->udma_mask
&= ATA_UDMA5
;
2581 dev
->max_sectors
= ATA_MAX_SECTORS
;
2584 if ((dev
->class == ATA_DEV_ATAPI
) &&
2585 (atapi_command_packet_set(id
) == TYPE_TAPE
)) {
2586 dev
->max_sectors
= ATA_MAX_SECTORS_TAPE
;
2587 dev
->horkage
|= ATA_HORKAGE_STUCK_ERR
;
2590 if (dev
->horkage
& ATA_HORKAGE_MAX_SEC_128
)
2591 dev
->max_sectors
= min_t(unsigned int, ATA_MAX_SECTORS_128
,
2594 if (ata_dev_blacklisted(dev
) & ATA_HORKAGE_IPM
) {
2595 dev
->horkage
|= ATA_HORKAGE_IPM
;
2597 /* reset link pm_policy for this port to no pm */
2598 ap
->pm_policy
= MAX_PERFORMANCE
;
2601 if (ap
->ops
->dev_config
)
2602 ap
->ops
->dev_config(dev
);
2604 if (dev
->horkage
& ATA_HORKAGE_DIAGNOSTIC
) {
2605 /* Let the user know. We don't want to disallow opens for
2606 rescue purposes, or in case the vendor is just a blithering
2607 idiot. Do this after the dev_config call as some controllers
2608 with buggy firmware may want to avoid reporting false device
2612 ata_dev_printk(dev
, KERN_WARNING
,
2613 "Drive reports diagnostics failure. This may indicate a drive\n");
2614 ata_dev_printk(dev
, KERN_WARNING
,
2615 "fault or invalid emulation. Contact drive vendor for information.\n");
2619 if (ata_msg_probe(ap
))
2620 ata_dev_printk(dev
, KERN_DEBUG
, "%s: EXIT, drv_stat = 0x%x\n",
2621 __func__
, ata_chk_status(ap
));
2625 if (ata_msg_probe(ap
))
2626 ata_dev_printk(dev
, KERN_DEBUG
,
2627 "%s: EXIT, err\n", __func__
);
2632 * ata_cable_40wire - return 40 wire cable type
2635 * Helper method for drivers which want to hardwire 40 wire cable
2639 int ata_cable_40wire(struct ata_port
*ap
)
2641 return ATA_CBL_PATA40
;
2645 * ata_cable_80wire - return 80 wire cable type
2648 * Helper method for drivers which want to hardwire 80 wire cable
2652 int ata_cable_80wire(struct ata_port
*ap
)
2654 return ATA_CBL_PATA80
;
2658 * ata_cable_unknown - return unknown PATA cable.
2661 * Helper method for drivers which have no PATA cable detection.
2664 int ata_cable_unknown(struct ata_port
*ap
)
2666 return ATA_CBL_PATA_UNK
;
2670 * ata_cable_ignore - return ignored PATA cable.
2673 * Helper method for drivers which don't use cable type to limit
2676 int ata_cable_ignore(struct ata_port
*ap
)
2678 return ATA_CBL_PATA_IGN
;
2682 * ata_cable_sata - return SATA cable type
2685 * Helper method for drivers which have SATA cables
2688 int ata_cable_sata(struct ata_port
*ap
)
2690 return ATA_CBL_SATA
;
2694 * ata_bus_probe - Reset and probe ATA bus
2697 * Master ATA bus probing function. Initiates a hardware-dependent
2698 * bus reset, then attempts to identify any devices found on
2702 * PCI/etc. bus probe sem.
2705 * Zero on success, negative errno otherwise.
2708 int ata_bus_probe(struct ata_port
*ap
)
2710 unsigned int classes
[ATA_MAX_DEVICES
];
2711 int tries
[ATA_MAX_DEVICES
];
2713 struct ata_device
*dev
;
2717 ata_link_for_each_dev(dev
, &ap
->link
)
2718 tries
[dev
->devno
] = ATA_PROBE_MAX_TRIES
;
2721 ata_link_for_each_dev(dev
, &ap
->link
) {
2722 /* If we issue an SRST then an ATA drive (not ATAPI)
2723 * may change configuration and be in PIO0 timing. If
2724 * we do a hard reset (or are coming from power on)
2725 * this is true for ATA or ATAPI. Until we've set a
2726 * suitable controller mode we should not touch the
2727 * bus as we may be talking too fast.
2729 dev
->pio_mode
= XFER_PIO_0
;
2731 /* If the controller has a pio mode setup function
2732 * then use it to set the chipset to rights. Don't
2733 * touch the DMA setup as that will be dealt with when
2734 * configuring devices.
2736 if (ap
->ops
->set_piomode
)
2737 ap
->ops
->set_piomode(ap
, dev
);
2740 /* reset and determine device classes */
2741 ap
->ops
->phy_reset(ap
);
2743 ata_link_for_each_dev(dev
, &ap
->link
) {
2744 if (!(ap
->flags
& ATA_FLAG_DISABLED
) &&
2745 dev
->class != ATA_DEV_UNKNOWN
)
2746 classes
[dev
->devno
] = dev
->class;
2748 classes
[dev
->devno
] = ATA_DEV_NONE
;
2750 dev
->class = ATA_DEV_UNKNOWN
;
2755 /* read IDENTIFY page and configure devices. We have to do the identify
2756 specific sequence bass-ackwards so that PDIAG- is released by
2759 ata_link_for_each_dev_reverse(dev
, &ap
->link
) {
2760 if (tries
[dev
->devno
])
2761 dev
->class = classes
[dev
->devno
];
2763 if (!ata_dev_enabled(dev
))
2766 rc
= ata_dev_read_id(dev
, &dev
->class, ATA_READID_POSTRESET
,
2772 /* Now ask for the cable type as PDIAG- should have been released */
2773 if (ap
->ops
->cable_detect
)
2774 ap
->cbl
= ap
->ops
->cable_detect(ap
);
2776 /* We may have SATA bridge glue hiding here irrespective of the
2777 reported cable types and sensed types */
2778 ata_link_for_each_dev(dev
, &ap
->link
) {
2779 if (!ata_dev_enabled(dev
))
2781 /* SATA drives indicate we have a bridge. We don't know which
2782 end of the link the bridge is which is a problem */
2783 if (ata_id_is_sata(dev
->id
))
2784 ap
->cbl
= ATA_CBL_SATA
;
2787 /* After the identify sequence we can now set up the devices. We do
2788 this in the normal order so that the user doesn't get confused */
2790 ata_link_for_each_dev(dev
, &ap
->link
) {
2791 if (!ata_dev_enabled(dev
))
2794 ap
->link
.eh_context
.i
.flags
|= ATA_EHI_PRINTINFO
;
2795 rc
= ata_dev_configure(dev
);
2796 ap
->link
.eh_context
.i
.flags
&= ~ATA_EHI_PRINTINFO
;
2801 /* configure transfer mode */
2802 rc
= ata_set_mode(&ap
->link
, &dev
);
2806 ata_link_for_each_dev(dev
, &ap
->link
)
2807 if (ata_dev_enabled(dev
))
2810 /* no device present, disable port */
2811 ata_port_disable(ap
);
2815 tries
[dev
->devno
]--;
2819 /* eeek, something went very wrong, give up */
2820 tries
[dev
->devno
] = 0;
2824 /* give it just one more chance */
2825 tries
[dev
->devno
] = min(tries
[dev
->devno
], 1);
2827 if (tries
[dev
->devno
] == 1) {
2828 /* This is the last chance, better to slow
2829 * down than lose it.
2831 sata_down_spd_limit(&ap
->link
);
2832 ata_down_xfermask_limit(dev
, ATA_DNXFER_PIO
);
2836 if (!tries
[dev
->devno
])
2837 ata_dev_disable(dev
);
2843 * ata_port_probe - Mark port as enabled
2844 * @ap: Port for which we indicate enablement
2846 * Modify @ap data structure such that the system
2847 * thinks that the entire port is enabled.
2849 * LOCKING: host lock, or some other form of
2853 void ata_port_probe(struct ata_port
*ap
)
2855 ap
->flags
&= ~ATA_FLAG_DISABLED
;
2859 * sata_print_link_status - Print SATA link status
2860 * @link: SATA link to printk link status about
2862 * This function prints link speed and status of a SATA link.
2867 void sata_print_link_status(struct ata_link
*link
)
2869 u32 sstatus
, scontrol
, tmp
;
2871 if (sata_scr_read(link
, SCR_STATUS
, &sstatus
))
2873 sata_scr_read(link
, SCR_CONTROL
, &scontrol
);
2875 if (ata_link_online(link
)) {
2876 tmp
= (sstatus
>> 4) & 0xf;
2877 ata_link_printk(link
, KERN_INFO
,
2878 "SATA link up %s (SStatus %X SControl %X)\n",
2879 sata_spd_string(tmp
), sstatus
, scontrol
);
2881 ata_link_printk(link
, KERN_INFO
,
2882 "SATA link down (SStatus %X SControl %X)\n",
2888 * ata_dev_pair - return other device on cable
2891 * Obtain the other device on the same cable, or if none is
2892 * present NULL is returned
2895 struct ata_device
*ata_dev_pair(struct ata_device
*adev
)
2897 struct ata_link
*link
= adev
->link
;
2898 struct ata_device
*pair
= &link
->device
[1 - adev
->devno
];
2899 if (!ata_dev_enabled(pair
))
2905 * ata_port_disable - Disable port.
2906 * @ap: Port to be disabled.
2908 * Modify @ap data structure such that the system
2909 * thinks that the entire port is disabled, and should
2910 * never attempt to probe or communicate with devices
2913 * LOCKING: host lock, or some other form of
2917 void ata_port_disable(struct ata_port
*ap
)
2919 ap
->link
.device
[0].class = ATA_DEV_NONE
;
2920 ap
->link
.device
[1].class = ATA_DEV_NONE
;
2921 ap
->flags
|= ATA_FLAG_DISABLED
;
2925 * sata_down_spd_limit - adjust SATA spd limit downward
2926 * @link: Link to adjust SATA spd limit for
2928 * Adjust SATA spd limit of @link downward. Note that this
2929 * function only adjusts the limit. The change must be applied
2930 * using sata_set_spd().
2933 * Inherited from caller.
2936 * 0 on success, negative errno on failure
2938 int sata_down_spd_limit(struct ata_link
*link
)
2940 u32 sstatus
, spd
, mask
;
2943 if (!sata_scr_valid(link
))
2946 /* If SCR can be read, use it to determine the current SPD.
2947 * If not, use cached value in link->sata_spd.
2949 rc
= sata_scr_read(link
, SCR_STATUS
, &sstatus
);
2951 spd
= (sstatus
>> 4) & 0xf;
2953 spd
= link
->sata_spd
;
2955 mask
= link
->sata_spd_limit
;
2959 /* unconditionally mask off the highest bit */
2960 highbit
= fls(mask
) - 1;
2961 mask
&= ~(1 << highbit
);
2963 /* Mask off all speeds higher than or equal to the current
2964 * one. Force 1.5Gbps if current SPD is not available.
2967 mask
&= (1 << (spd
- 1)) - 1;
2971 /* were we already at the bottom? */
2975 link
->sata_spd_limit
= mask
;
2977 ata_link_printk(link
, KERN_WARNING
, "limiting SATA link speed to %s\n",
2978 sata_spd_string(fls(mask
)));
2983 static int __sata_set_spd_needed(struct ata_link
*link
, u32
*scontrol
)
2985 struct ata_link
*host_link
= &link
->ap
->link
;
2986 u32 limit
, target
, spd
;
2988 limit
= link
->sata_spd_limit
;
2990 /* Don't configure downstream link faster than upstream link.
2991 * It doesn't speed up anything and some PMPs choke on such
2994 if (!ata_is_host_link(link
) && host_link
->sata_spd
)
2995 limit
&= (1 << host_link
->sata_spd
) - 1;
2997 if (limit
== UINT_MAX
)
3000 target
= fls(limit
);
3002 spd
= (*scontrol
>> 4) & 0xf;
3003 *scontrol
= (*scontrol
& ~0xf0) | ((target
& 0xf) << 4);
3005 return spd
!= target
;
3009 * sata_set_spd_needed - is SATA spd configuration needed
3010 * @link: Link in question
3012 * Test whether the spd limit in SControl matches
3013 * @link->sata_spd_limit. This function is used to determine
3014 * whether hardreset is necessary to apply SATA spd
3018 * Inherited from caller.
3021 * 1 if SATA spd configuration is needed, 0 otherwise.
3023 int sata_set_spd_needed(struct ata_link
*link
)
3027 if (sata_scr_read(link
, SCR_CONTROL
, &scontrol
))
3030 return __sata_set_spd_needed(link
, &scontrol
);
3034 * sata_set_spd - set SATA spd according to spd limit
3035 * @link: Link to set SATA spd for
3037 * Set SATA spd of @link according to sata_spd_limit.
3040 * Inherited from caller.
3043 * 0 if spd doesn't need to be changed, 1 if spd has been
3044 * changed. Negative errno if SCR registers are inaccessible.
3046 int sata_set_spd(struct ata_link
*link
)
3051 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
3054 if (!__sata_set_spd_needed(link
, &scontrol
))
3057 if ((rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
)))
3064 * This mode timing computation functionality is ported over from
3065 * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik
3068 * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
3069 * These were taken from ATA/ATAPI-6 standard, rev 0a, except
3070 * for UDMA6, which is currently supported only by Maxtor drives.
3072 * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0.
3075 static const struct ata_timing ata_timing
[] = {
3076 /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */
3077 { XFER_PIO_0
, 70, 290, 240, 600, 165, 150, 600, 0 },
3078 { XFER_PIO_1
, 50, 290, 93, 383, 125, 100, 383, 0 },
3079 { XFER_PIO_2
, 30, 290, 40, 330, 100, 90, 240, 0 },
3080 { XFER_PIO_3
, 30, 80, 70, 180, 80, 70, 180, 0 },
3081 { XFER_PIO_4
, 25, 70, 25, 120, 70, 25, 120, 0 },
3082 { XFER_PIO_5
, 15, 65, 25, 100, 65, 25, 100, 0 },
3083 { XFER_PIO_6
, 10, 55, 20, 80, 55, 20, 80, 0 },
3085 { XFER_SW_DMA_0
, 120, 0, 0, 0, 480, 480, 960, 0 },
3086 { XFER_SW_DMA_1
, 90, 0, 0, 0, 240, 240, 480, 0 },
3087 { XFER_SW_DMA_2
, 60, 0, 0, 0, 120, 120, 240, 0 },
3089 { XFER_MW_DMA_0
, 60, 0, 0, 0, 215, 215, 480, 0 },
3090 { XFER_MW_DMA_1
, 45, 0, 0, 0, 80, 50, 150, 0 },
3091 { XFER_MW_DMA_2
, 25, 0, 0, 0, 70, 25, 120, 0 },
3092 { XFER_MW_DMA_3
, 25, 0, 0, 0, 65, 25, 100, 0 },
3093 { XFER_MW_DMA_4
, 25, 0, 0, 0, 55, 20, 80, 0 },
3095 /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */
3096 { XFER_UDMA_0
, 0, 0, 0, 0, 0, 0, 0, 120 },
3097 { XFER_UDMA_1
, 0, 0, 0, 0, 0, 0, 0, 80 },
3098 { XFER_UDMA_2
, 0, 0, 0, 0, 0, 0, 0, 60 },
3099 { XFER_UDMA_3
, 0, 0, 0, 0, 0, 0, 0, 45 },
3100 { XFER_UDMA_4
, 0, 0, 0, 0, 0, 0, 0, 30 },
3101 { XFER_UDMA_5
, 0, 0, 0, 0, 0, 0, 0, 20 },
3102 { XFER_UDMA_6
, 0, 0, 0, 0, 0, 0, 0, 15 },
3107 #define ENOUGH(v, unit) (((v)-1)/(unit)+1)
3108 #define EZ(v, unit) ((v)?ENOUGH(v, unit):0)
3110 static void ata_timing_quantize(const struct ata_timing
*t
, struct ata_timing
*q
, int T
, int UT
)
3112 q
->setup
= EZ(t
->setup
* 1000, T
);
3113 q
->act8b
= EZ(t
->act8b
* 1000, T
);
3114 q
->rec8b
= EZ(t
->rec8b
* 1000, T
);
3115 q
->cyc8b
= EZ(t
->cyc8b
* 1000, T
);
3116 q
->active
= EZ(t
->active
* 1000, T
);
3117 q
->recover
= EZ(t
->recover
* 1000, T
);
3118 q
->cycle
= EZ(t
->cycle
* 1000, T
);
3119 q
->udma
= EZ(t
->udma
* 1000, UT
);
3122 void ata_timing_merge(const struct ata_timing
*a
, const struct ata_timing
*b
,
3123 struct ata_timing
*m
, unsigned int what
)
3125 if (what
& ATA_TIMING_SETUP
) m
->setup
= max(a
->setup
, b
->setup
);
3126 if (what
& ATA_TIMING_ACT8B
) m
->act8b
= max(a
->act8b
, b
->act8b
);
3127 if (what
& ATA_TIMING_REC8B
) m
->rec8b
= max(a
->rec8b
, b
->rec8b
);
3128 if (what
& ATA_TIMING_CYC8B
) m
->cyc8b
= max(a
->cyc8b
, b
->cyc8b
);
3129 if (what
& ATA_TIMING_ACTIVE
) m
->active
= max(a
->active
, b
->active
);
3130 if (what
& ATA_TIMING_RECOVER
) m
->recover
= max(a
->recover
, b
->recover
);
3131 if (what
& ATA_TIMING_CYCLE
) m
->cycle
= max(a
->cycle
, b
->cycle
);
3132 if (what
& ATA_TIMING_UDMA
) m
->udma
= max(a
->udma
, b
->udma
);
3135 const struct ata_timing
*ata_timing_find_mode(u8 xfer_mode
)
3137 const struct ata_timing
*t
= ata_timing
;
3139 while (xfer_mode
> t
->mode
)
3142 if (xfer_mode
== t
->mode
)
3147 int ata_timing_compute(struct ata_device
*adev
, unsigned short speed
,
3148 struct ata_timing
*t
, int T
, int UT
)
3150 const struct ata_timing
*s
;
3151 struct ata_timing p
;
3157 if (!(s
= ata_timing_find_mode(speed
)))
3160 memcpy(t
, s
, sizeof(*s
));
3163 * If the drive is an EIDE drive, it can tell us it needs extended
3164 * PIO/MW_DMA cycle timing.
3167 if (adev
->id
[ATA_ID_FIELD_VALID
] & 2) { /* EIDE drive */
3168 memset(&p
, 0, sizeof(p
));
3169 if (speed
>= XFER_PIO_0
&& speed
<= XFER_SW_DMA_0
) {
3170 if (speed
<= XFER_PIO_2
) p
.cycle
= p
.cyc8b
= adev
->id
[ATA_ID_EIDE_PIO
];
3171 else p
.cycle
= p
.cyc8b
= adev
->id
[ATA_ID_EIDE_PIO_IORDY
];
3172 } else if (speed
>= XFER_MW_DMA_0
&& speed
<= XFER_MW_DMA_2
) {
3173 p
.cycle
= adev
->id
[ATA_ID_EIDE_DMA_MIN
];
3175 ata_timing_merge(&p
, t
, t
, ATA_TIMING_CYCLE
| ATA_TIMING_CYC8B
);
3179 * Convert the timing to bus clock counts.
3182 ata_timing_quantize(t
, t
, T
, UT
);
3185 * Even in DMA/UDMA modes we still use PIO access for IDENTIFY,
3186 * S.M.A.R.T * and some other commands. We have to ensure that the
3187 * DMA cycle timing is slower/equal than the fastest PIO timing.
3190 if (speed
> XFER_PIO_6
) {
3191 ata_timing_compute(adev
, adev
->pio_mode
, &p
, T
, UT
);
3192 ata_timing_merge(&p
, t
, t
, ATA_TIMING_ALL
);
3196 * Lengthen active & recovery time so that cycle time is correct.
3199 if (t
->act8b
+ t
->rec8b
< t
->cyc8b
) {
3200 t
->act8b
+= (t
->cyc8b
- (t
->act8b
+ t
->rec8b
)) / 2;
3201 t
->rec8b
= t
->cyc8b
- t
->act8b
;
3204 if (t
->active
+ t
->recover
< t
->cycle
) {
3205 t
->active
+= (t
->cycle
- (t
->active
+ t
->recover
)) / 2;
3206 t
->recover
= t
->cycle
- t
->active
;
3209 /* In a few cases quantisation may produce enough errors to
3210 leave t->cycle too low for the sum of active and recovery
3211 if so we must correct this */
3212 if (t
->active
+ t
->recover
> t
->cycle
)
3213 t
->cycle
= t
->active
+ t
->recover
;
3219 * ata_timing_cycle2mode - find xfer mode for the specified cycle duration
3220 * @xfer_shift: ATA_SHIFT_* value for transfer type to examine.
3221 * @cycle: cycle duration in ns
3223 * Return matching xfer mode for @cycle. The returned mode is of
3224 * the transfer type specified by @xfer_shift. If @cycle is too
3225 * slow for @xfer_shift, 0xff is returned. If @cycle is faster
3226 * than the fastest known mode, the fasted mode is returned.
3232 * Matching xfer_mode, 0xff if no match found.
3234 u8
ata_timing_cycle2mode(unsigned int xfer_shift
, int cycle
)
3236 u8 base_mode
= 0xff, last_mode
= 0xff;
3237 const struct ata_xfer_ent
*ent
;
3238 const struct ata_timing
*t
;
3240 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
3241 if (ent
->shift
== xfer_shift
)
3242 base_mode
= ent
->base
;
3244 for (t
= ata_timing_find_mode(base_mode
);
3245 t
&& ata_xfer_mode2shift(t
->mode
) == xfer_shift
; t
++) {
3246 unsigned short this_cycle
;
3248 switch (xfer_shift
) {
3250 case ATA_SHIFT_MWDMA
:
3251 this_cycle
= t
->cycle
;
3253 case ATA_SHIFT_UDMA
:
3254 this_cycle
= t
->udma
;
3260 if (cycle
> this_cycle
)
3263 last_mode
= t
->mode
;
3270 * ata_down_xfermask_limit - adjust dev xfer masks downward
3271 * @dev: Device to adjust xfer masks
3272 * @sel: ATA_DNXFER_* selector
3274 * Adjust xfer masks of @dev downward. Note that this function
3275 * does not apply the change. Invoking ata_set_mode() afterwards
3276 * will apply the limit.
3279 * Inherited from caller.
3282 * 0 on success, negative errno on failure
3284 int ata_down_xfermask_limit(struct ata_device
*dev
, unsigned int sel
)
3287 unsigned long orig_mask
, xfer_mask
;
3288 unsigned long pio_mask
, mwdma_mask
, udma_mask
;
3291 quiet
= !!(sel
& ATA_DNXFER_QUIET
);
3292 sel
&= ~ATA_DNXFER_QUIET
;
3294 xfer_mask
= orig_mask
= ata_pack_xfermask(dev
->pio_mask
,
3297 ata_unpack_xfermask(xfer_mask
, &pio_mask
, &mwdma_mask
, &udma_mask
);
3300 case ATA_DNXFER_PIO
:
3301 highbit
= fls(pio_mask
) - 1;
3302 pio_mask
&= ~(1 << highbit
);
3305 case ATA_DNXFER_DMA
:
3307 highbit
= fls(udma_mask
) - 1;
3308 udma_mask
&= ~(1 << highbit
);
3311 } else if (mwdma_mask
) {
3312 highbit
= fls(mwdma_mask
) - 1;
3313 mwdma_mask
&= ~(1 << highbit
);
3319 case ATA_DNXFER_40C
:
3320 udma_mask
&= ATA_UDMA_MASK_40C
;
3323 case ATA_DNXFER_FORCE_PIO0
:
3325 case ATA_DNXFER_FORCE_PIO
:
3334 xfer_mask
&= ata_pack_xfermask(pio_mask
, mwdma_mask
, udma_mask
);
3336 if (!(xfer_mask
& ATA_MASK_PIO
) || xfer_mask
== orig_mask
)
3340 if (xfer_mask
& (ATA_MASK_MWDMA
| ATA_MASK_UDMA
))
3341 snprintf(buf
, sizeof(buf
), "%s:%s",
3342 ata_mode_string(xfer_mask
),
3343 ata_mode_string(xfer_mask
& ATA_MASK_PIO
));
3345 snprintf(buf
, sizeof(buf
), "%s",
3346 ata_mode_string(xfer_mask
));
3348 ata_dev_printk(dev
, KERN_WARNING
,
3349 "limiting speed to %s\n", buf
);
3352 ata_unpack_xfermask(xfer_mask
, &dev
->pio_mask
, &dev
->mwdma_mask
,
3358 static int ata_dev_set_mode(struct ata_device
*dev
)
3360 struct ata_eh_context
*ehc
= &dev
->link
->eh_context
;
3361 const char *dev_err_whine
= "";
3362 int ign_dev_err
= 0;
3363 unsigned int err_mask
;
3366 dev
->flags
&= ~ATA_DFLAG_PIO
;
3367 if (dev
->xfer_shift
== ATA_SHIFT_PIO
)
3368 dev
->flags
|= ATA_DFLAG_PIO
;
3370 err_mask
= ata_dev_set_xfermode(dev
);
3372 if (err_mask
& ~AC_ERR_DEV
)
3376 ehc
->i
.flags
|= ATA_EHI_POST_SETMODE
;
3377 rc
= ata_dev_revalidate(dev
, ATA_DEV_UNKNOWN
, 0);
3378 ehc
->i
.flags
&= ~ATA_EHI_POST_SETMODE
;
3382 /* Old CFA may refuse this command, which is just fine */
3383 if (dev
->xfer_shift
== ATA_SHIFT_PIO
&& ata_id_is_cfa(dev
->id
))
3386 /* Some very old devices and some bad newer ones fail any kind of
3387 SET_XFERMODE request but support PIO0-2 timings and no IORDY */
3388 if (dev
->xfer_shift
== ATA_SHIFT_PIO
&& !ata_id_has_iordy(dev
->id
) &&
3389 dev
->pio_mode
<= XFER_PIO_2
)
3392 /* Early MWDMA devices do DMA but don't allow DMA mode setting.
3393 Don't fail an MWDMA0 set IFF the device indicates it is in MWDMA0 */
3394 if (dev
->xfer_shift
== ATA_SHIFT_MWDMA
&&
3395 dev
->dma_mode
== XFER_MW_DMA_0
&&
3396 (dev
->id
[63] >> 8) & 1)
3399 /* if the device is actually configured correctly, ignore dev err */
3400 if (dev
->xfer_mode
== ata_xfer_mask2mode(ata_id_xfermask(dev
->id
)))
3403 if (err_mask
& AC_ERR_DEV
) {
3407 dev_err_whine
= " (device error ignored)";
3410 DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
3411 dev
->xfer_shift
, (int)dev
->xfer_mode
);
3413 ata_dev_printk(dev
, KERN_INFO
, "configured for %s%s\n",
3414 ata_mode_string(ata_xfer_mode2mask(dev
->xfer_mode
)),
3420 ata_dev_printk(dev
, KERN_ERR
, "failed to set xfermode "
3421 "(err_mask=0x%x)\n", err_mask
);
3426 * ata_do_set_mode - Program timings and issue SET FEATURES - XFER
3427 * @link: link on which timings will be programmed
3428 * @r_failed_dev: out parameter for failed device
3430 * Standard implementation of the function used to tune and set
3431 * ATA device disk transfer mode (PIO3, UDMA6, etc.). If
3432 * ata_dev_set_mode() fails, pointer to the failing device is
3433 * returned in @r_failed_dev.
3436 * PCI/etc. bus probe sem.
3439 * 0 on success, negative errno otherwise
3442 int ata_do_set_mode(struct ata_link
*link
, struct ata_device
**r_failed_dev
)
3444 struct ata_port
*ap
= link
->ap
;
3445 struct ata_device
*dev
;
3446 int rc
= 0, used_dma
= 0, found
= 0;
3448 /* step 1: calculate xfer_mask */
3449 ata_link_for_each_dev(dev
, link
) {
3450 unsigned long pio_mask
, dma_mask
;
3451 unsigned int mode_mask
;
3453 if (!ata_dev_enabled(dev
))
3456 mode_mask
= ATA_DMA_MASK_ATA
;
3457 if (dev
->class == ATA_DEV_ATAPI
)
3458 mode_mask
= ATA_DMA_MASK_ATAPI
;
3459 else if (ata_id_is_cfa(dev
->id
))
3460 mode_mask
= ATA_DMA_MASK_CFA
;
3462 ata_dev_xfermask(dev
);
3463 ata_force_xfermask(dev
);
3465 pio_mask
= ata_pack_xfermask(dev
->pio_mask
, 0, 0);
3466 dma_mask
= ata_pack_xfermask(0, dev
->mwdma_mask
, dev
->udma_mask
);
3468 if (libata_dma_mask
& mode_mask
)
3469 dma_mask
= ata_pack_xfermask(0, dev
->mwdma_mask
, dev
->udma_mask
);
3473 dev
->pio_mode
= ata_xfer_mask2mode(pio_mask
);
3474 dev
->dma_mode
= ata_xfer_mask2mode(dma_mask
);
3477 if (dev
->dma_mode
!= 0xff)
3483 /* step 2: always set host PIO timings */
3484 ata_link_for_each_dev(dev
, link
) {
3485 if (!ata_dev_enabled(dev
))
3488 if (dev
->pio_mode
== 0xff) {
3489 ata_dev_printk(dev
, KERN_WARNING
, "no PIO support\n");
3494 dev
->xfer_mode
= dev
->pio_mode
;
3495 dev
->xfer_shift
= ATA_SHIFT_PIO
;
3496 if (ap
->ops
->set_piomode
)
3497 ap
->ops
->set_piomode(ap
, dev
);
3500 /* step 3: set host DMA timings */
3501 ata_link_for_each_dev(dev
, link
) {
3502 if (!ata_dev_enabled(dev
) || dev
->dma_mode
== 0xff)
3505 dev
->xfer_mode
= dev
->dma_mode
;
3506 dev
->xfer_shift
= ata_xfer_mode2shift(dev
->dma_mode
);
3507 if (ap
->ops
->set_dmamode
)
3508 ap
->ops
->set_dmamode(ap
, dev
);
3511 /* step 4: update devices' xfer mode */
3512 ata_link_for_each_dev(dev
, link
) {
3513 /* don't update suspended devices' xfer mode */
3514 if (!ata_dev_enabled(dev
))
3517 rc
= ata_dev_set_mode(dev
);
3522 /* Record simplex status. If we selected DMA then the other
3523 * host channels are not permitted to do so.
3525 if (used_dma
&& (ap
->host
->flags
& ATA_HOST_SIMPLEX
))
3526 ap
->host
->simplex_claimed
= ap
;
3530 *r_failed_dev
= dev
;
3535 * ata_tf_to_host - issue ATA taskfile to host controller
3536 * @ap: port to which command is being issued
3537 * @tf: ATA taskfile register set
3539 * Issues ATA taskfile register set to ATA host controller,
3540 * with proper synchronization with interrupt handler and
3544 * spin_lock_irqsave(host lock)
3547 static inline void ata_tf_to_host(struct ata_port
*ap
,
3548 const struct ata_taskfile
*tf
)
3550 ap
->ops
->tf_load(ap
, tf
);
3551 ap
->ops
->exec_command(ap
, tf
);
3555 * ata_busy_sleep - sleep until BSY clears, or timeout
3556 * @ap: port containing status register to be polled
3557 * @tmout_pat: impatience timeout
3558 * @tmout: overall timeout
3560 * Sleep until ATA Status register bit BSY clears,
3561 * or a timeout occurs.
3564 * Kernel thread context (may sleep).
3567 * 0 on success, -errno otherwise.
3569 int ata_busy_sleep(struct ata_port
*ap
,
3570 unsigned long tmout_pat
, unsigned long tmout
)
3572 unsigned long timer_start
, timeout
;
3575 status
= ata_busy_wait(ap
, ATA_BUSY
, 300);
3576 timer_start
= jiffies
;
3577 timeout
= timer_start
+ tmout_pat
;
3578 while (status
!= 0xff && (status
& ATA_BUSY
) &&
3579 time_before(jiffies
, timeout
)) {
3581 status
= ata_busy_wait(ap
, ATA_BUSY
, 3);
3584 if (status
!= 0xff && (status
& ATA_BUSY
))
3585 ata_port_printk(ap
, KERN_WARNING
,
3586 "port is slow to respond, please be patient "
3587 "(Status 0x%x)\n", status
);
3589 timeout
= timer_start
+ tmout
;
3590 while (status
!= 0xff && (status
& ATA_BUSY
) &&
3591 time_before(jiffies
, timeout
)) {
3593 status
= ata_chk_status(ap
);
3599 if (status
& ATA_BUSY
) {
3600 ata_port_printk(ap
, KERN_ERR
, "port failed to respond "
3601 "(%lu secs, Status 0x%x)\n",
3602 tmout
/ HZ
, status
);
3610 * ata_wait_after_reset - wait before checking status after reset
3611 * @ap: port containing status register to be polled
3612 * @deadline: deadline jiffies for the operation
3614 * After reset, we need to pause a while before reading status.
3615 * Also, certain combination of controller and device report 0xff
3616 * for some duration (e.g. until SATA PHY is up and running)
3617 * which is interpreted as empty port in ATA world. This
3618 * function also waits for such devices to get out of 0xff
3622 * Kernel thread context (may sleep).
3624 void ata_wait_after_reset(struct ata_port
*ap
, unsigned long deadline
)
3626 unsigned long until
= jiffies
+ ATA_TMOUT_FF_WAIT
;
3628 if (time_before(until
, deadline
))
3631 /* Spec mandates ">= 2ms" before checking status. We wait
3632 * 150ms, because that was the magic delay used for ATAPI
3633 * devices in Hale Landis's ATADRVR, for the period of time
3634 * between when the ATA command register is written, and then
3635 * status is checked. Because waiting for "a while" before
3636 * checking status is fine, post SRST, we perform this magic
3637 * delay here as well.
3639 * Old drivers/ide uses the 2mS rule and then waits for ready.
3643 /* Wait for 0xff to clear. Some SATA devices take a long time
3644 * to clear 0xff after reset. For example, HHD424020F7SV00
3645 * iVDR needs >= 800ms while. Quantum GoVault needs even more
3648 * Note that some PATA controllers (pata_ali) explode if
3649 * status register is read more than once when there's no
3652 if (ap
->flags
& ATA_FLAG_SATA
) {
3654 u8 status
= ata_chk_status(ap
);
3656 if (status
!= 0xff || time_after(jiffies
, deadline
))
3665 * ata_wait_ready - sleep until BSY clears, or timeout
3666 * @ap: port containing status register to be polled
3667 * @deadline: deadline jiffies for the operation
3669 * Sleep until ATA Status register bit BSY clears, or timeout
3673 * Kernel thread context (may sleep).
3676 * 0 on success, -errno otherwise.
3678 int ata_wait_ready(struct ata_port
*ap
, unsigned long deadline
)
3680 unsigned long start
= jiffies
;
3684 u8 status
= ata_chk_status(ap
);
3685 unsigned long now
= jiffies
;
3687 if (!(status
& ATA_BUSY
))
3689 if (!ata_link_online(&ap
->link
) && status
== 0xff)
3691 if (time_after(now
, deadline
))
3694 if (!warned
&& time_after(now
, start
+ 5 * HZ
) &&
3695 (deadline
- now
> 3 * HZ
)) {
3696 ata_port_printk(ap
, KERN_WARNING
,
3697 "port is slow to respond, please be patient "
3698 "(Status 0x%x)\n", status
);
3706 static int ata_bus_post_reset(struct ata_port
*ap
, unsigned int devmask
,
3707 unsigned long deadline
)
3709 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
3710 unsigned int dev0
= devmask
& (1 << 0);
3711 unsigned int dev1
= devmask
& (1 << 1);
3714 /* if device 0 was found in ata_devchk, wait for its
3718 rc
= ata_wait_ready(ap
, deadline
);
3726 /* if device 1 was found in ata_devchk, wait for register
3727 * access briefly, then wait for BSY to clear.
3732 ap
->ops
->dev_select(ap
, 1);
3734 /* Wait for register access. Some ATAPI devices fail
3735 * to set nsect/lbal after reset, so don't waste too
3736 * much time on it. We're gonna wait for !BSY anyway.
3738 for (i
= 0; i
< 2; i
++) {
3741 nsect
= ioread8(ioaddr
->nsect_addr
);
3742 lbal
= ioread8(ioaddr
->lbal_addr
);
3743 if ((nsect
== 1) && (lbal
== 1))
3745 msleep(50); /* give drive a breather */
3748 rc
= ata_wait_ready(ap
, deadline
);
3756 /* is all this really necessary? */
3757 ap
->ops
->dev_select(ap
, 0);
3759 ap
->ops
->dev_select(ap
, 1);
3761 ap
->ops
->dev_select(ap
, 0);
3766 static int ata_bus_softreset(struct ata_port
*ap
, unsigned int devmask
,
3767 unsigned long deadline
)
3769 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
3771 DPRINTK("ata%u: bus reset via SRST\n", ap
->print_id
);
3773 /* software reset. causes dev0 to be selected */
3774 iowrite8(ap
->ctl
, ioaddr
->ctl_addr
);
3775 udelay(20); /* FIXME: flush */
3776 iowrite8(ap
->ctl
| ATA_SRST
, ioaddr
->ctl_addr
);
3777 udelay(20); /* FIXME: flush */
3778 iowrite8(ap
->ctl
, ioaddr
->ctl_addr
);
3780 /* wait a while before checking status */
3781 ata_wait_after_reset(ap
, deadline
);
3783 /* Before we perform post reset processing we want to see if
3784 * the bus shows 0xFF because the odd clown forgets the D7
3785 * pulldown resistor.
3787 if (ata_chk_status(ap
) == 0xFF)
3790 return ata_bus_post_reset(ap
, devmask
, deadline
);
3794 * ata_bus_reset - reset host port and associated ATA channel
3795 * @ap: port to reset
3797 * This is typically the first time we actually start issuing
3798 * commands to the ATA channel. We wait for BSY to clear, then
3799 * issue EXECUTE DEVICE DIAGNOSTIC command, polling for its
3800 * result. Determine what devices, if any, are on the channel
3801 * by looking at the device 0/1 error register. Look at the signature
3802 * stored in each device's taskfile registers, to determine if
3803 * the device is ATA or ATAPI.
3806 * PCI/etc. bus probe sem.
3807 * Obtains host lock.
3810 * Sets ATA_FLAG_DISABLED if bus reset fails.
3813 void ata_bus_reset(struct ata_port
*ap
)
3815 struct ata_device
*device
= ap
->link
.device
;
3816 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
3817 unsigned int slave_possible
= ap
->flags
& ATA_FLAG_SLAVE_POSS
;
3819 unsigned int dev0
, dev1
= 0, devmask
= 0;
3822 DPRINTK("ENTER, host %u, port %u\n", ap
->print_id
, ap
->port_no
);
3824 /* determine if device 0/1 are present */
3825 if (ap
->flags
& ATA_FLAG_SATA_RESET
)
3828 dev0
= ata_devchk(ap
, 0);
3830 dev1
= ata_devchk(ap
, 1);
3834 devmask
|= (1 << 0);
3836 devmask
|= (1 << 1);
3838 /* select device 0 again */
3839 ap
->ops
->dev_select(ap
, 0);
3841 /* issue bus reset */
3842 if (ap
->flags
& ATA_FLAG_SRST
) {
3843 rc
= ata_bus_softreset(ap
, devmask
, jiffies
+ 40 * HZ
);
3844 if (rc
&& rc
!= -ENODEV
)
3849 * determine by signature whether we have ATA or ATAPI devices
3851 device
[0].class = ata_dev_try_classify(&device
[0], dev0
, &err
);
3852 if ((slave_possible
) && (err
!= 0x81))
3853 device
[1].class = ata_dev_try_classify(&device
[1], dev1
, &err
);
3855 /* is double-select really necessary? */
3856 if (device
[1].class != ATA_DEV_NONE
)
3857 ap
->ops
->dev_select(ap
, 1);
3858 if (device
[0].class != ATA_DEV_NONE
)
3859 ap
->ops
->dev_select(ap
, 0);
3861 /* if no devices were detected, disable this port */
3862 if ((device
[0].class == ATA_DEV_NONE
) &&
3863 (device
[1].class == ATA_DEV_NONE
))
3866 if (ap
->flags
& (ATA_FLAG_SATA_RESET
| ATA_FLAG_SRST
)) {
3867 /* set up device control for ATA_FLAG_SATA_RESET */
3868 iowrite8(ap
->ctl
, ioaddr
->ctl_addr
);
3875 ata_port_printk(ap
, KERN_ERR
, "disabling port\n");
3876 ata_port_disable(ap
);
3882 * sata_link_debounce - debounce SATA phy status
3883 * @link: ATA link to debounce SATA phy status for
3884 * @params: timing parameters { interval, duratinon, timeout } in msec
3885 * @deadline: deadline jiffies for the operation
3887 * Make sure SStatus of @link reaches stable state, determined by
3888 * holding the same value where DET is not 1 for @duration polled
3889 * every @interval, before @timeout. Timeout constraints the
3890 * beginning of the stable state. Because DET gets stuck at 1 on
3891 * some controllers after hot unplugging, this functions waits
3892 * until timeout then returns 0 if DET is stable at 1.
3894 * @timeout is further limited by @deadline. The sooner of the
3898 * Kernel thread context (may sleep)
3901 * 0 on success, -errno on failure.
3903 int sata_link_debounce(struct ata_link
*link
, const unsigned long *params
,
3904 unsigned long deadline
)
3906 unsigned long interval_msec
= params
[0];
3907 unsigned long duration
= msecs_to_jiffies(params
[1]);
3908 unsigned long last_jiffies
, t
;
3912 t
= jiffies
+ msecs_to_jiffies(params
[2]);
3913 if (time_before(t
, deadline
))
3916 if ((rc
= sata_scr_read(link
, SCR_STATUS
, &cur
)))
3921 last_jiffies
= jiffies
;
3924 msleep(interval_msec
);
3925 if ((rc
= sata_scr_read(link
, SCR_STATUS
, &cur
)))
3931 if (cur
== 1 && time_before(jiffies
, deadline
))
3933 if (time_after(jiffies
, last_jiffies
+ duration
))
3938 /* unstable, start over */
3940 last_jiffies
= jiffies
;
3942 /* Check deadline. If debouncing failed, return
3943 * -EPIPE to tell upper layer to lower link speed.
3945 if (time_after(jiffies
, deadline
))
3951 * sata_link_resume - resume SATA link
3952 * @link: ATA link to resume SATA
3953 * @params: timing parameters { interval, duratinon, timeout } in msec
3954 * @deadline: deadline jiffies for the operation
3956 * Resume SATA phy @link and debounce it.
3959 * Kernel thread context (may sleep)
3962 * 0 on success, -errno on failure.
3964 int sata_link_resume(struct ata_link
*link
, const unsigned long *params
,
3965 unsigned long deadline
)
3970 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
3973 scontrol
= (scontrol
& 0x0f0) | 0x300;
3975 if ((rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
)))
3978 /* Some PHYs react badly if SStatus is pounded immediately
3979 * after resuming. Delay 200ms before debouncing.
3983 return sata_link_debounce(link
, params
, deadline
);
3987 * ata_std_prereset - prepare for reset
3988 * @link: ATA link to be reset
3989 * @deadline: deadline jiffies for the operation
3991 * @link is about to be reset. Initialize it. Failure from
3992 * prereset makes libata abort whole reset sequence and give up
3993 * that port, so prereset should be best-effort. It does its
3994 * best to prepare for reset sequence but if things go wrong, it
3995 * should just whine, not fail.
3998 * Kernel thread context (may sleep)
4001 * 0 on success, -errno otherwise.
4003 int ata_std_prereset(struct ata_link
*link
, unsigned long deadline
)
4005 struct ata_port
*ap
= link
->ap
;
4006 struct ata_eh_context
*ehc
= &link
->eh_context
;
4007 const unsigned long *timing
= sata_ehc_deb_timing(ehc
);
4010 /* if we're about to do hardreset, nothing more to do */
4011 if (ehc
->i
.action
& ATA_EH_HARDRESET
)
4014 /* if SATA, resume link */
4015 if (ap
->flags
& ATA_FLAG_SATA
) {
4016 rc
= sata_link_resume(link
, timing
, deadline
);
4017 /* whine about phy resume failure but proceed */
4018 if (rc
&& rc
!= -EOPNOTSUPP
)
4019 ata_link_printk(link
, KERN_WARNING
, "failed to resume "
4020 "link for reset (errno=%d)\n", rc
);
4023 /* wait for !BSY if we don't know that no device is attached */
4024 if (!ata_link_offline(link
)) {
4025 rc
= ata_wait_ready(ap
, deadline
);
4026 if (rc
&& rc
!= -ENODEV
) {
4027 ata_link_printk(link
, KERN_WARNING
, "device not ready "
4028 "(errno=%d), forcing hardreset\n", rc
);
4029 ehc
->i
.action
|= ATA_EH_HARDRESET
;
4037 * ata_std_softreset - reset host port via ATA SRST
4038 * @link: ATA link to reset
4039 * @classes: resulting classes of attached devices
4040 * @deadline: deadline jiffies for the operation
4042 * Reset host port using ATA SRST.
4045 * Kernel thread context (may sleep)
4048 * 0 on success, -errno otherwise.
4050 int ata_std_softreset(struct ata_link
*link
, unsigned int *classes
,
4051 unsigned long deadline
)
4053 struct ata_port
*ap
= link
->ap
;
4054 unsigned int slave_possible
= ap
->flags
& ATA_FLAG_SLAVE_POSS
;
4055 unsigned int devmask
= 0;
4061 if (ata_link_offline(link
)) {
4062 classes
[0] = ATA_DEV_NONE
;
4066 /* determine if device 0/1 are present */
4067 if (ata_devchk(ap
, 0))
4068 devmask
|= (1 << 0);
4069 if (slave_possible
&& ata_devchk(ap
, 1))
4070 devmask
|= (1 << 1);
4072 /* select device 0 again */
4073 ap
->ops
->dev_select(ap
, 0);
4075 /* issue bus reset */
4076 DPRINTK("about to softreset, devmask=%x\n", devmask
);
4077 rc
= ata_bus_softreset(ap
, devmask
, deadline
);
4078 /* if link is occupied, -ENODEV too is an error */
4079 if (rc
&& (rc
!= -ENODEV
|| sata_scr_valid(link
))) {
4080 ata_link_printk(link
, KERN_ERR
, "SRST failed (errno=%d)\n", rc
);
4084 /* determine by signature whether we have ATA or ATAPI devices */
4085 classes
[0] = ata_dev_try_classify(&link
->device
[0],
4086 devmask
& (1 << 0), &err
);
4087 if (slave_possible
&& err
!= 0x81)
4088 classes
[1] = ata_dev_try_classify(&link
->device
[1],
4089 devmask
& (1 << 1), &err
);
4092 DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes
[0], classes
[1]);
4097 * sata_link_hardreset - reset link via SATA phy reset
4098 * @link: link to reset
4099 * @timing: timing parameters { interval, duratinon, timeout } in msec
4100 * @deadline: deadline jiffies for the operation
4102 * SATA phy-reset @link using DET bits of SControl register.
4105 * Kernel thread context (may sleep)
4108 * 0 on success, -errno otherwise.
4110 int sata_link_hardreset(struct ata_link
*link
, const unsigned long *timing
,
4111 unsigned long deadline
)
4118 if (sata_set_spd_needed(link
)) {
4119 /* SATA spec says nothing about how to reconfigure
4120 * spd. To be on the safe side, turn off phy during
4121 * reconfiguration. This works for at least ICH7 AHCI
4124 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
4127 scontrol
= (scontrol
& 0x0f0) | 0x304;
4129 if ((rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
)))
4135 /* issue phy wake/reset */
4136 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
4139 scontrol
= (scontrol
& 0x0f0) | 0x301;
4141 if ((rc
= sata_scr_write_flush(link
, SCR_CONTROL
, scontrol
)))
4144 /* Couldn't find anything in SATA I/II specs, but AHCI-1.1
4145 * 10.4.2 says at least 1 ms.
4149 /* bring link back */
4150 rc
= sata_link_resume(link
, timing
, deadline
);
4152 DPRINTK("EXIT, rc=%d\n", rc
);
4157 * sata_std_hardreset - reset host port via SATA phy reset
4158 * @link: link to reset
4159 * @class: resulting class of attached device
4160 * @deadline: deadline jiffies for the operation
4162 * SATA phy-reset host port using DET bits of SControl register,
4163 * wait for !BSY and classify the attached device.
4166 * Kernel thread context (may sleep)
4169 * 0 on success, -errno otherwise.
4171 int sata_std_hardreset(struct ata_link
*link
, unsigned int *class,
4172 unsigned long deadline
)
4174 struct ata_port
*ap
= link
->ap
;
4175 const unsigned long *timing
= sata_ehc_deb_timing(&link
->eh_context
);
4181 rc
= sata_link_hardreset(link
, timing
, deadline
);
4183 ata_link_printk(link
, KERN_ERR
,
4184 "COMRESET failed (errno=%d)\n", rc
);
4188 /* TODO: phy layer with polling, timeouts, etc. */
4189 if (ata_link_offline(link
)) {
4190 *class = ATA_DEV_NONE
;
4191 DPRINTK("EXIT, link offline\n");
4195 /* wait a while before checking status */
4196 ata_wait_after_reset(ap
, deadline
);
4198 /* If PMP is supported, we have to do follow-up SRST. Note
4199 * that some PMPs don't send D2H Reg FIS after hardreset at
4200 * all if the first port is empty. Wait for it just for a
4201 * second and request follow-up SRST.
4203 if (ap
->flags
& ATA_FLAG_PMP
) {
4204 ata_wait_ready(ap
, jiffies
+ HZ
);
4208 rc
= ata_wait_ready(ap
, deadline
);
4209 /* link occupied, -ENODEV too is an error */
4211 ata_link_printk(link
, KERN_ERR
,
4212 "COMRESET failed (errno=%d)\n", rc
);
4216 ap
->ops
->dev_select(ap
, 0); /* probably unnecessary */
4218 *class = ata_dev_try_classify(link
->device
, 1, NULL
);
4220 DPRINTK("EXIT, class=%u\n", *class);
4225 * ata_std_postreset - standard postreset callback
4226 * @link: the target ata_link
4227 * @classes: classes of attached devices
4229 * This function is invoked after a successful reset. Note that
4230 * the device might have been reset more than once using
4231 * different reset methods before postreset is invoked.
4234 * Kernel thread context (may sleep)
4236 void ata_std_postreset(struct ata_link
*link
, unsigned int *classes
)
4238 struct ata_port
*ap
= link
->ap
;
4243 /* print link status */
4244 sata_print_link_status(link
);
4247 if (sata_scr_read(link
, SCR_ERROR
, &serror
) == 0)
4248 sata_scr_write(link
, SCR_ERROR
, serror
);
4249 link
->eh_info
.serror
= 0;
4251 /* is double-select really necessary? */
4252 if (classes
[0] != ATA_DEV_NONE
)
4253 ap
->ops
->dev_select(ap
, 1);
4254 if (classes
[1] != ATA_DEV_NONE
)
4255 ap
->ops
->dev_select(ap
, 0);
4257 /* bail out if no device is present */
4258 if (classes
[0] == ATA_DEV_NONE
&& classes
[1] == ATA_DEV_NONE
) {
4259 DPRINTK("EXIT, no device\n");
4263 /* set up device control */
4264 if (ap
->ioaddr
.ctl_addr
)
4265 iowrite8(ap
->ctl
, ap
->ioaddr
.ctl_addr
);
4271 * ata_dev_same_device - Determine whether new ID matches configured device
4272 * @dev: device to compare against
4273 * @new_class: class of the new device
4274 * @new_id: IDENTIFY page of the new device
4276 * Compare @new_class and @new_id against @dev and determine
4277 * whether @dev is the device indicated by @new_class and
4284 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
4286 static int ata_dev_same_device(struct ata_device
*dev
, unsigned int new_class
,
4289 const u16
*old_id
= dev
->id
;
4290 unsigned char model
[2][ATA_ID_PROD_LEN
+ 1];
4291 unsigned char serial
[2][ATA_ID_SERNO_LEN
+ 1];
4293 if (dev
->class != new_class
) {
4294 ata_dev_printk(dev
, KERN_INFO
, "class mismatch %d != %d\n",
4295 dev
->class, new_class
);
4299 ata_id_c_string(old_id
, model
[0], ATA_ID_PROD
, sizeof(model
[0]));
4300 ata_id_c_string(new_id
, model
[1], ATA_ID_PROD
, sizeof(model
[1]));
4301 ata_id_c_string(old_id
, serial
[0], ATA_ID_SERNO
, sizeof(serial
[0]));
4302 ata_id_c_string(new_id
, serial
[1], ATA_ID_SERNO
, sizeof(serial
[1]));
4304 if (strcmp(model
[0], model
[1])) {
4305 ata_dev_printk(dev
, KERN_INFO
, "model number mismatch "
4306 "'%s' != '%s'\n", model
[0], model
[1]);
4310 if (strcmp(serial
[0], serial
[1])) {
4311 ata_dev_printk(dev
, KERN_INFO
, "serial number mismatch "
4312 "'%s' != '%s'\n", serial
[0], serial
[1]);
4320 * ata_dev_reread_id - Re-read IDENTIFY data
4321 * @dev: target ATA device
4322 * @readid_flags: read ID flags
4324 * Re-read IDENTIFY page and make sure @dev is still attached to
4328 * Kernel thread context (may sleep)
4331 * 0 on success, negative errno otherwise
4333 int ata_dev_reread_id(struct ata_device
*dev
, unsigned int readid_flags
)
4335 unsigned int class = dev
->class;
4336 u16
*id
= (void *)dev
->link
->ap
->sector_buf
;
4340 rc
= ata_dev_read_id(dev
, &class, readid_flags
, id
);
4344 /* is the device still there? */
4345 if (!ata_dev_same_device(dev
, class, id
))
4348 memcpy(dev
->id
, id
, sizeof(id
[0]) * ATA_ID_WORDS
);
4353 * ata_dev_revalidate - Revalidate ATA device
4354 * @dev: device to revalidate
4355 * @new_class: new class code
4356 * @readid_flags: read ID flags
4358 * Re-read IDENTIFY page, make sure @dev is still attached to the
4359 * port and reconfigure it according to the new IDENTIFY page.
4362 * Kernel thread context (may sleep)
4365 * 0 on success, negative errno otherwise
4367 int ata_dev_revalidate(struct ata_device
*dev
, unsigned int new_class
,
4368 unsigned int readid_flags
)
4370 u64 n_sectors
= dev
->n_sectors
;
4373 if (!ata_dev_enabled(dev
))
4376 /* fail early if !ATA && !ATAPI to avoid issuing [P]IDENTIFY to PMP */
4377 if (ata_class_enabled(new_class
) &&
4378 new_class
!= ATA_DEV_ATA
&& new_class
!= ATA_DEV_ATAPI
) {
4379 ata_dev_printk(dev
, KERN_INFO
, "class mismatch %u != %u\n",
4380 dev
->class, new_class
);
4386 rc
= ata_dev_reread_id(dev
, readid_flags
);
4390 /* configure device according to the new ID */
4391 rc
= ata_dev_configure(dev
);
4395 /* verify n_sectors hasn't changed */
4396 if (dev
->class == ATA_DEV_ATA
&& n_sectors
&&
4397 dev
->n_sectors
!= n_sectors
) {
4398 ata_dev_printk(dev
, KERN_INFO
, "n_sectors mismatch "
4400 (unsigned long long)n_sectors
,
4401 (unsigned long long)dev
->n_sectors
);
4403 /* restore original n_sectors */
4404 dev
->n_sectors
= n_sectors
;
4413 ata_dev_printk(dev
, KERN_ERR
, "revalidation failed (errno=%d)\n", rc
);
4417 struct ata_blacklist_entry
{
4418 const char *model_num
;
4419 const char *model_rev
;
4420 unsigned long horkage
;
4423 static const struct ata_blacklist_entry ata_device_blacklist
[] = {
4424 /* Devices with DMA related problems under Linux */
4425 { "WDC AC11000H", NULL
, ATA_HORKAGE_NODMA
},
4426 { "WDC AC22100H", NULL
, ATA_HORKAGE_NODMA
},
4427 { "WDC AC32500H", NULL
, ATA_HORKAGE_NODMA
},
4428 { "WDC AC33100H", NULL
, ATA_HORKAGE_NODMA
},
4429 { "WDC AC31600H", NULL
, ATA_HORKAGE_NODMA
},
4430 { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA
},
4431 { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA
},
4432 { "Compaq CRD-8241B", NULL
, ATA_HORKAGE_NODMA
},
4433 { "CRD-8400B", NULL
, ATA_HORKAGE_NODMA
},
4434 { "CRD-8480B", NULL
, ATA_HORKAGE_NODMA
},
4435 { "CRD-8482B", NULL
, ATA_HORKAGE_NODMA
},
4436 { "CRD-84", NULL
, ATA_HORKAGE_NODMA
},
4437 { "SanDisk SDP3B", NULL
, ATA_HORKAGE_NODMA
},
4438 { "SanDisk SDP3B-64", NULL
, ATA_HORKAGE_NODMA
},
4439 { "SANYO CD-ROM CRD", NULL
, ATA_HORKAGE_NODMA
},
4440 { "HITACHI CDR-8", NULL
, ATA_HORKAGE_NODMA
},
4441 { "HITACHI CDR-8335", NULL
, ATA_HORKAGE_NODMA
},
4442 { "HITACHI CDR-8435", NULL
, ATA_HORKAGE_NODMA
},
4443 { "Toshiba CD-ROM XM-6202B", NULL
, ATA_HORKAGE_NODMA
},
4444 { "TOSHIBA CD-ROM XM-1702BC", NULL
, ATA_HORKAGE_NODMA
},
4445 { "CD-532E-A", NULL
, ATA_HORKAGE_NODMA
},
4446 { "E-IDE CD-ROM CR-840",NULL
, ATA_HORKAGE_NODMA
},
4447 { "CD-ROM Drive/F5A", NULL
, ATA_HORKAGE_NODMA
},
4448 { "WPI CDD-820", NULL
, ATA_HORKAGE_NODMA
},
4449 { "SAMSUNG CD-ROM SC-148C", NULL
, ATA_HORKAGE_NODMA
},
4450 { "SAMSUNG CD-ROM SC", NULL
, ATA_HORKAGE_NODMA
},
4451 { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL
,ATA_HORKAGE_NODMA
},
4452 { "_NEC DV5800A", NULL
, ATA_HORKAGE_NODMA
},
4453 { "SAMSUNG CD-ROM SN-124", "N001", ATA_HORKAGE_NODMA
},
4454 { "Seagate STT20000A", NULL
, ATA_HORKAGE_NODMA
},
4455 /* Odd clown on sil3726/4726 PMPs */
4456 { "Config Disk", NULL
, ATA_HORKAGE_NODMA
|
4457 ATA_HORKAGE_SKIP_PM
},
4459 /* Weird ATAPI devices */
4460 { "TORiSAN DVD-ROM DRD-N216", NULL
, ATA_HORKAGE_MAX_SEC_128
},
4462 /* Devices we expect to fail diagnostics */
4464 /* Devices where NCQ should be avoided */
4466 { "WDC WD740ADFD-00", NULL
, ATA_HORKAGE_NONCQ
},
4467 { "WDC WD740ADFD-00NLR1", NULL
, ATA_HORKAGE_NONCQ
, },
4468 /* http://thread.gmane.org/gmane.linux.ide/14907 */
4469 { "FUJITSU MHT2060BH", NULL
, ATA_HORKAGE_NONCQ
},
4471 { "Maxtor *", "BANC*", ATA_HORKAGE_NONCQ
},
4472 { "Maxtor 7V300F0", "VA111630", ATA_HORKAGE_NONCQ
},
4473 { "ST380817AS", "3.42", ATA_HORKAGE_NONCQ
},
4474 { "ST3160023AS", "3.42", ATA_HORKAGE_NONCQ
},
4476 /* Blacklist entries taken from Silicon Image 3124/3132
4477 Windows driver .inf file - also several Linux problem reports */
4478 { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ
, },
4479 { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ
, },
4480 { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ
, },
4482 /* devices which puke on READ_NATIVE_MAX */
4483 { "HDS724040KLSA80", "KFAOA20N", ATA_HORKAGE_BROKEN_HPA
, },
4484 { "WDC WD3200JD-00KLB0", "WD-WCAMR1130137", ATA_HORKAGE_BROKEN_HPA
},
4485 { "WDC WD2500JD-00HBB0", "WD-WMAL71490727", ATA_HORKAGE_BROKEN_HPA
},
4486 { "MAXTOR 6L080L4", "A93.0500", ATA_HORKAGE_BROKEN_HPA
},
4488 /* Devices which report 1 sector over size HPA */
4489 { "ST340823A", NULL
, ATA_HORKAGE_HPA_SIZE
, },
4490 { "ST320413A", NULL
, ATA_HORKAGE_HPA_SIZE
, },
4491 { "ST310211A", NULL
, ATA_HORKAGE_HPA_SIZE
, },
4493 /* Devices which get the IVB wrong */
4494 { "QUANTUM FIREBALLlct10 05", "A03.0900", ATA_HORKAGE_IVB
, },
4495 { "TSSTcorp CDDVDW SH-S202J", "SB00", ATA_HORKAGE_IVB
, },
4496 { "TSSTcorp CDDVDW SH-S202J", "SB01", ATA_HORKAGE_IVB
, },
4497 { "TSSTcorp CDDVDW SH-S202N", "SB00", ATA_HORKAGE_IVB
, },
4498 { "TSSTcorp CDDVDW SH-S202N", "SB01", ATA_HORKAGE_IVB
, },
4504 static int strn_pattern_cmp(const char *patt
, const char *name
, int wildchar
)
4510 * check for trailing wildcard: *\0
4512 p
= strchr(patt
, wildchar
);
4513 if (p
&& ((*(p
+ 1)) == 0))
4524 return strncmp(patt
, name
, len
);
4527 static unsigned long ata_dev_blacklisted(const struct ata_device
*dev
)
4529 unsigned char model_num
[ATA_ID_PROD_LEN
+ 1];
4530 unsigned char model_rev
[ATA_ID_FW_REV_LEN
+ 1];
4531 const struct ata_blacklist_entry
*ad
= ata_device_blacklist
;
4533 ata_id_c_string(dev
->id
, model_num
, ATA_ID_PROD
, sizeof(model_num
));
4534 ata_id_c_string(dev
->id
, model_rev
, ATA_ID_FW_REV
, sizeof(model_rev
));
4536 while (ad
->model_num
) {
4537 if (!strn_pattern_cmp(ad
->model_num
, model_num
, '*')) {
4538 if (ad
->model_rev
== NULL
)
4540 if (!strn_pattern_cmp(ad
->model_rev
, model_rev
, '*'))
4548 static int ata_dma_blacklisted(const struct ata_device
*dev
)
4550 /* We don't support polling DMA.
4551 * DMA blacklist those ATAPI devices with CDB-intr (and use PIO)
4552 * if the LLDD handles only interrupts in the HSM_ST_LAST state.
4554 if ((dev
->link
->ap
->flags
& ATA_FLAG_PIO_POLLING
) &&
4555 (dev
->flags
& ATA_DFLAG_CDB_INTR
))
4557 return (dev
->horkage
& ATA_HORKAGE_NODMA
) ? 1 : 0;
4561 * ata_is_40wire - check drive side detection
4564 * Perform drive side detection decoding, allowing for device vendors
4565 * who can't follow the documentation.
4568 static int ata_is_40wire(struct ata_device
*dev
)
4570 if (dev
->horkage
& ATA_HORKAGE_IVB
)
4571 return ata_drive_40wire_relaxed(dev
->id
);
4572 return ata_drive_40wire(dev
->id
);
4576 * ata_dev_xfermask - Compute supported xfermask of the given device
4577 * @dev: Device to compute xfermask for
4579 * Compute supported xfermask of @dev and store it in
4580 * dev->*_mask. This function is responsible for applying all
4581 * known limits including host controller limits, device
4587 static void ata_dev_xfermask(struct ata_device
*dev
)
4589 struct ata_link
*link
= dev
->link
;
4590 struct ata_port
*ap
= link
->ap
;
4591 struct ata_host
*host
= ap
->host
;
4592 unsigned long xfer_mask
;
4594 /* controller modes available */
4595 xfer_mask
= ata_pack_xfermask(ap
->pio_mask
,
4596 ap
->mwdma_mask
, ap
->udma_mask
);
4598 /* drive modes available */
4599 xfer_mask
&= ata_pack_xfermask(dev
->pio_mask
,
4600 dev
->mwdma_mask
, dev
->udma_mask
);
4601 xfer_mask
&= ata_id_xfermask(dev
->id
);
4604 * CFA Advanced TrueIDE timings are not allowed on a shared
4607 if (ata_dev_pair(dev
)) {
4608 /* No PIO5 or PIO6 */
4609 xfer_mask
&= ~(0x03 << (ATA_SHIFT_PIO
+ 5));
4610 /* No MWDMA3 or MWDMA 4 */
4611 xfer_mask
&= ~(0x03 << (ATA_SHIFT_MWDMA
+ 3));
4614 if (ata_dma_blacklisted(dev
)) {
4615 xfer_mask
&= ~(ATA_MASK_MWDMA
| ATA_MASK_UDMA
);
4616 ata_dev_printk(dev
, KERN_WARNING
,
4617 "device is on DMA blacklist, disabling DMA\n");
4620 if ((host
->flags
& ATA_HOST_SIMPLEX
) &&
4621 host
->simplex_claimed
&& host
->simplex_claimed
!= ap
) {
4622 xfer_mask
&= ~(ATA_MASK_MWDMA
| ATA_MASK_UDMA
);
4623 ata_dev_printk(dev
, KERN_WARNING
, "simplex DMA is claimed by "
4624 "other device, disabling DMA\n");
4627 if (ap
->flags
& ATA_FLAG_NO_IORDY
)
4628 xfer_mask
&= ata_pio_mask_no_iordy(dev
);
4630 if (ap
->ops
->mode_filter
)
4631 xfer_mask
= ap
->ops
->mode_filter(dev
, xfer_mask
);
4633 /* Apply cable rule here. Don't apply it early because when
4634 * we handle hot plug the cable type can itself change.
4635 * Check this last so that we know if the transfer rate was
4636 * solely limited by the cable.
4637 * Unknown or 80 wire cables reported host side are checked
4638 * drive side as well. Cases where we know a 40wire cable
4639 * is used safely for 80 are not checked here.
4641 if (xfer_mask
& (0xF8 << ATA_SHIFT_UDMA
))
4642 /* UDMA/44 or higher would be available */
4643 if ((ap
->cbl
== ATA_CBL_PATA40
) ||
4644 (ata_is_40wire(dev
) &&
4645 (ap
->cbl
== ATA_CBL_PATA_UNK
||
4646 ap
->cbl
== ATA_CBL_PATA80
))) {
4647 ata_dev_printk(dev
, KERN_WARNING
,
4648 "limited to UDMA/33 due to 40-wire cable\n");
4649 xfer_mask
&= ~(0xF8 << ATA_SHIFT_UDMA
);
4652 ata_unpack_xfermask(xfer_mask
, &dev
->pio_mask
,
4653 &dev
->mwdma_mask
, &dev
->udma_mask
);
4657 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
4658 * @dev: Device to which command will be sent
4660 * Issue SET FEATURES - XFER MODE command to device @dev
4664 * PCI/etc. bus probe sem.
4667 * 0 on success, AC_ERR_* mask otherwise.
4670 static unsigned int ata_dev_set_xfermode(struct ata_device
*dev
)
4672 struct ata_taskfile tf
;
4673 unsigned int err_mask
;
4675 /* set up set-features taskfile */
4676 DPRINTK("set features - xfer mode\n");
4678 /* Some controllers and ATAPI devices show flaky interrupt
4679 * behavior after setting xfer mode. Use polling instead.
4681 ata_tf_init(dev
, &tf
);
4682 tf
.command
= ATA_CMD_SET_FEATURES
;
4683 tf
.feature
= SETFEATURES_XFER
;
4684 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
| ATA_TFLAG_POLLING
;
4685 tf
.protocol
= ATA_PROT_NODATA
;
4686 /* If we are using IORDY we must send the mode setting command */
4687 if (ata_pio_need_iordy(dev
))
4688 tf
.nsect
= dev
->xfer_mode
;
4689 /* If the device has IORDY and the controller does not - turn it off */
4690 else if (ata_id_has_iordy(dev
->id
))
4692 else /* In the ancient relic department - skip all of this */
4695 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
4697 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
4701 * ata_dev_set_feature - Issue SET FEATURES - SATA FEATURES
4702 * @dev: Device to which command will be sent
4703 * @enable: Whether to enable or disable the feature
4704 * @feature: The sector count represents the feature to set
4706 * Issue SET FEATURES - SATA FEATURES command to device @dev
4707 * on port @ap with sector count
4710 * PCI/etc. bus probe sem.
4713 * 0 on success, AC_ERR_* mask otherwise.
4715 static unsigned int ata_dev_set_feature(struct ata_device
*dev
, u8 enable
,
4718 struct ata_taskfile tf
;
4719 unsigned int err_mask
;
4721 /* set up set-features taskfile */
4722 DPRINTK("set features - SATA features\n");
4724 ata_tf_init(dev
, &tf
);
4725 tf
.command
= ATA_CMD_SET_FEATURES
;
4726 tf
.feature
= enable
;
4727 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
4728 tf
.protocol
= ATA_PROT_NODATA
;
4731 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
4733 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
4738 * ata_dev_init_params - Issue INIT DEV PARAMS command
4739 * @dev: Device to which command will be sent
4740 * @heads: Number of heads (taskfile parameter)
4741 * @sectors: Number of sectors (taskfile parameter)
4744 * Kernel thread context (may sleep)
4747 * 0 on success, AC_ERR_* mask otherwise.
4749 static unsigned int ata_dev_init_params(struct ata_device
*dev
,
4750 u16 heads
, u16 sectors
)
4752 struct ata_taskfile tf
;
4753 unsigned int err_mask
;
4755 /* Number of sectors per track 1-255. Number of heads 1-16 */
4756 if (sectors
< 1 || sectors
> 255 || heads
< 1 || heads
> 16)
4757 return AC_ERR_INVALID
;
4759 /* set up init dev params taskfile */
4760 DPRINTK("init dev params \n");
4762 ata_tf_init(dev
, &tf
);
4763 tf
.command
= ATA_CMD_INIT_DEV_PARAMS
;
4764 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
4765 tf
.protocol
= ATA_PROT_NODATA
;
4767 tf
.device
|= (heads
- 1) & 0x0f; /* max head = num. of heads - 1 */
4769 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
4770 /* A clean abort indicates an original or just out of spec drive
4771 and we should continue as we issue the setup based on the
4772 drive reported working geometry */
4773 if (err_mask
== AC_ERR_DEV
&& (tf
.feature
& ATA_ABORTED
))
4776 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
4781 * ata_sg_clean - Unmap DMA memory associated with command
4782 * @qc: Command containing DMA memory to be released
4784 * Unmap all mapped DMA memory associated with this command.
4787 * spin_lock_irqsave(host lock)
4789 void ata_sg_clean(struct ata_queued_cmd
*qc
)
4791 struct ata_port
*ap
= qc
->ap
;
4792 struct scatterlist
*sg
= qc
->sg
;
4793 int dir
= qc
->dma_dir
;
4795 WARN_ON(sg
== NULL
);
4797 VPRINTK("unmapping %u sg elements\n", qc
->n_elem
);
4800 dma_unmap_sg(ap
->dev
, sg
, qc
->n_elem
, dir
);
4802 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
4807 * ata_fill_sg - Fill PCI IDE PRD table
4808 * @qc: Metadata associated with taskfile to be transferred
4810 * Fill PCI IDE PRD (scatter-gather) table with segments
4811 * associated with the current disk command.
4814 * spin_lock_irqsave(host lock)
4817 static void ata_fill_sg(struct ata_queued_cmd
*qc
)
4819 struct ata_port
*ap
= qc
->ap
;
4820 struct scatterlist
*sg
;
4821 unsigned int si
, pi
;
4824 for_each_sg(qc
->sg
, sg
, qc
->n_elem
, si
) {
4828 /* determine if physical DMA addr spans 64K boundary.
4829 * Note h/w doesn't support 64-bit, so we unconditionally
4830 * truncate dma_addr_t to u32.
4832 addr
= (u32
) sg_dma_address(sg
);
4833 sg_len
= sg_dma_len(sg
);
4836 offset
= addr
& 0xffff;
4838 if ((offset
+ sg_len
) > 0x10000)
4839 len
= 0x10000 - offset
;
4841 ap
->prd
[pi
].addr
= cpu_to_le32(addr
);
4842 ap
->prd
[pi
].flags_len
= cpu_to_le32(len
& 0xffff);
4843 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", pi
, addr
, len
);
4851 ap
->prd
[pi
- 1].flags_len
|= cpu_to_le32(ATA_PRD_EOT
);
4855 * ata_fill_sg_dumb - Fill PCI IDE PRD table
4856 * @qc: Metadata associated with taskfile to be transferred
4858 * Fill PCI IDE PRD (scatter-gather) table with segments
4859 * associated with the current disk command. Perform the fill
4860 * so that we avoid writing any length 64K records for
4861 * controllers that don't follow the spec.
4864 * spin_lock_irqsave(host lock)
4867 static void ata_fill_sg_dumb(struct ata_queued_cmd
*qc
)
4869 struct ata_port
*ap
= qc
->ap
;
4870 struct scatterlist
*sg
;
4871 unsigned int si
, pi
;
4874 for_each_sg(qc
->sg
, sg
, qc
->n_elem
, si
) {
4876 u32 sg_len
, len
, blen
;
4878 /* determine if physical DMA addr spans 64K boundary.
4879 * Note h/w doesn't support 64-bit, so we unconditionally
4880 * truncate dma_addr_t to u32.
4882 addr
= (u32
) sg_dma_address(sg
);
4883 sg_len
= sg_dma_len(sg
);
4886 offset
= addr
& 0xffff;
4888 if ((offset
+ sg_len
) > 0x10000)
4889 len
= 0x10000 - offset
;
4891 blen
= len
& 0xffff;
4892 ap
->prd
[pi
].addr
= cpu_to_le32(addr
);
4894 /* Some PATA chipsets like the CS5530 can't
4895 cope with 0x0000 meaning 64K as the spec says */
4896 ap
->prd
[pi
].flags_len
= cpu_to_le32(0x8000);
4898 ap
->prd
[++pi
].addr
= cpu_to_le32(addr
+ 0x8000);
4900 ap
->prd
[pi
].flags_len
= cpu_to_le32(blen
);
4901 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", pi
, addr
, len
);
4909 ap
->prd
[pi
- 1].flags_len
|= cpu_to_le32(ATA_PRD_EOT
);
4913 * ata_check_atapi_dma - Check whether ATAPI DMA can be supported
4914 * @qc: Metadata associated with taskfile to check
4916 * Allow low-level driver to filter ATA PACKET commands, returning
4917 * a status indicating whether or not it is OK to use DMA for the
4918 * supplied PACKET command.
4921 * spin_lock_irqsave(host lock)
4923 * RETURNS: 0 when ATAPI DMA can be used
4926 int ata_check_atapi_dma(struct ata_queued_cmd
*qc
)
4928 struct ata_port
*ap
= qc
->ap
;
4930 /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a
4931 * few ATAPI devices choke on such DMA requests.
4933 if (unlikely(qc
->nbytes
& 15))
4936 if (ap
->ops
->check_atapi_dma
)
4937 return ap
->ops
->check_atapi_dma(qc
);
4943 * ata_std_qc_defer - Check whether a qc needs to be deferred
4944 * @qc: ATA command in question
4946 * Non-NCQ commands cannot run with any other command, NCQ or
4947 * not. As upper layer only knows the queue depth, we are
4948 * responsible for maintaining exclusion. This function checks
4949 * whether a new command @qc can be issued.
4952 * spin_lock_irqsave(host lock)
4955 * ATA_DEFER_* if deferring is needed, 0 otherwise.
4957 int ata_std_qc_defer(struct ata_queued_cmd
*qc
)
4959 struct ata_link
*link
= qc
->dev
->link
;
4961 if (qc
->tf
.protocol
== ATA_PROT_NCQ
) {
4962 if (!ata_tag_valid(link
->active_tag
))
4965 if (!ata_tag_valid(link
->active_tag
) && !link
->sactive
)
4969 return ATA_DEFER_LINK
;
4973 * ata_qc_prep - Prepare taskfile for submission
4974 * @qc: Metadata associated with taskfile to be prepared
4976 * Prepare ATA taskfile for submission.
4979 * spin_lock_irqsave(host lock)
4981 void ata_qc_prep(struct ata_queued_cmd
*qc
)
4983 if (!(qc
->flags
& ATA_QCFLAG_DMAMAP
))
4990 * ata_dumb_qc_prep - Prepare taskfile for submission
4991 * @qc: Metadata associated with taskfile to be prepared
4993 * Prepare ATA taskfile for submission.
4996 * spin_lock_irqsave(host lock)
4998 void ata_dumb_qc_prep(struct ata_queued_cmd
*qc
)
5000 if (!(qc
->flags
& ATA_QCFLAG_DMAMAP
))
5003 ata_fill_sg_dumb(qc
);
5006 void ata_noop_qc_prep(struct ata_queued_cmd
*qc
) { }
5009 * ata_sg_init - Associate command with scatter-gather table.
5010 * @qc: Command to be associated
5011 * @sg: Scatter-gather table.
5012 * @n_elem: Number of elements in s/g table.
5014 * Initialize the data-related elements of queued_cmd @qc
5015 * to point to a scatter-gather table @sg, containing @n_elem
5019 * spin_lock_irqsave(host lock)
5021 void ata_sg_init(struct ata_queued_cmd
*qc
, struct scatterlist
*sg
,
5022 unsigned int n_elem
)
5025 qc
->n_elem
= n_elem
;
5030 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
5031 * @qc: Command with scatter-gather table to be mapped.
5033 * DMA-map the scatter-gather table associated with queued_cmd @qc.
5036 * spin_lock_irqsave(host lock)
5039 * Zero on success, negative on error.
5042 static int ata_sg_setup(struct ata_queued_cmd
*qc
)
5044 struct ata_port
*ap
= qc
->ap
;
5045 unsigned int n_elem
;
5047 VPRINTK("ENTER, ata%u\n", ap
->print_id
);
5049 n_elem
= dma_map_sg(ap
->dev
, qc
->sg
, qc
->n_elem
, qc
->dma_dir
);
5053 DPRINTK("%d sg elements mapped\n", n_elem
);
5055 qc
->n_elem
= n_elem
;
5056 qc
->flags
|= ATA_QCFLAG_DMAMAP
;
5062 * swap_buf_le16 - swap halves of 16-bit words in place
5063 * @buf: Buffer to swap
5064 * @buf_words: Number of 16-bit words in buffer.
5066 * Swap halves of 16-bit words if needed to convert from
5067 * little-endian byte order to native cpu byte order, or
5071 * Inherited from caller.
5073 void swap_buf_le16(u16
*buf
, unsigned int buf_words
)
5078 for (i
= 0; i
< buf_words
; i
++)
5079 buf
[i
] = le16_to_cpu(buf
[i
]);
5080 #endif /* __BIG_ENDIAN */
5084 * ata_data_xfer - Transfer data by PIO
5085 * @dev: device to target
5087 * @buflen: buffer length
5090 * Transfer data from/to the device data register by PIO.
5093 * Inherited from caller.
5098 unsigned int ata_data_xfer(struct ata_device
*dev
, unsigned char *buf
,
5099 unsigned int buflen
, int rw
)
5101 struct ata_port
*ap
= dev
->link
->ap
;
5102 void __iomem
*data_addr
= ap
->ioaddr
.data_addr
;
5103 unsigned int words
= buflen
>> 1;
5105 /* Transfer multiple of 2 bytes */
5107 ioread16_rep(data_addr
, buf
, words
);
5109 iowrite16_rep(data_addr
, buf
, words
);
5111 /* Transfer trailing 1 byte, if any. */
5112 if (unlikely(buflen
& 0x01)) {
5113 __le16 align_buf
[1] = { 0 };
5114 unsigned char *trailing_buf
= buf
+ buflen
- 1;
5117 align_buf
[0] = cpu_to_le16(ioread16(data_addr
));
5118 memcpy(trailing_buf
, align_buf
, 1);
5120 memcpy(align_buf
, trailing_buf
, 1);
5121 iowrite16(le16_to_cpu(align_buf
[0]), data_addr
);
5130 * ata_data_xfer_noirq - Transfer data by PIO
5131 * @dev: device to target
5133 * @buflen: buffer length
5136 * Transfer data from/to the device data register by PIO. Do the
5137 * transfer with interrupts disabled.
5140 * Inherited from caller.
5145 unsigned int ata_data_xfer_noirq(struct ata_device
*dev
, unsigned char *buf
,
5146 unsigned int buflen
, int rw
)
5148 unsigned long flags
;
5149 unsigned int consumed
;
5151 local_irq_save(flags
);
5152 consumed
= ata_data_xfer(dev
, buf
, buflen
, rw
);
5153 local_irq_restore(flags
);
5160 * ata_pio_sector - Transfer a sector of data.
5161 * @qc: Command on going
5163 * Transfer qc->sect_size bytes of data from/to the ATA device.
5166 * Inherited from caller.
5169 static void ata_pio_sector(struct ata_queued_cmd
*qc
)
5171 int do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
);
5172 struct ata_port
*ap
= qc
->ap
;
5174 unsigned int offset
;
5177 if (qc
->curbytes
== qc
->nbytes
- qc
->sect_size
)
5178 ap
->hsm_task_state
= HSM_ST_LAST
;
5180 page
= sg_page(qc
->cursg
);
5181 offset
= qc
->cursg
->offset
+ qc
->cursg_ofs
;
5183 /* get the current page and offset */
5184 page
= nth_page(page
, (offset
>> PAGE_SHIFT
));
5185 offset
%= PAGE_SIZE
;
5187 DPRINTK("data %s\n", qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
5189 if (PageHighMem(page
)) {
5190 unsigned long flags
;
5192 /* FIXME: use a bounce buffer */
5193 local_irq_save(flags
);
5194 buf
= kmap_atomic(page
, KM_IRQ0
);
5196 /* do the actual data transfer */
5197 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, qc
->sect_size
, do_write
);
5199 kunmap_atomic(buf
, KM_IRQ0
);
5200 local_irq_restore(flags
);
5202 buf
= page_address(page
);
5203 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, qc
->sect_size
, do_write
);
5206 qc
->curbytes
+= qc
->sect_size
;
5207 qc
->cursg_ofs
+= qc
->sect_size
;
5209 if (qc
->cursg_ofs
== qc
->cursg
->length
) {
5210 qc
->cursg
= sg_next(qc
->cursg
);
5216 * ata_pio_sectors - Transfer one or many sectors.
5217 * @qc: Command on going
5219 * Transfer one or many sectors of data from/to the
5220 * ATA device for the DRQ request.
5223 * Inherited from caller.
5226 static void ata_pio_sectors(struct ata_queued_cmd
*qc
)
5228 if (is_multi_taskfile(&qc
->tf
)) {
5229 /* READ/WRITE MULTIPLE */
5232 WARN_ON(qc
->dev
->multi_count
== 0);
5234 nsect
= min((qc
->nbytes
- qc
->curbytes
) / qc
->sect_size
,
5235 qc
->dev
->multi_count
);
5241 ata_altstatus(qc
->ap
); /* flush */
5245 * atapi_send_cdb - Write CDB bytes to hardware
5246 * @ap: Port to which ATAPI device is attached.
5247 * @qc: Taskfile currently active
5249 * When device has indicated its readiness to accept
5250 * a CDB, this function is called. Send the CDB.
5256 static void atapi_send_cdb(struct ata_port
*ap
, struct ata_queued_cmd
*qc
)
5259 DPRINTK("send cdb\n");
5260 WARN_ON(qc
->dev
->cdb_len
< 12);
5262 ap
->ops
->data_xfer(qc
->dev
, qc
->cdb
, qc
->dev
->cdb_len
, 1);
5263 ata_altstatus(ap
); /* flush */
5265 switch (qc
->tf
.protocol
) {
5266 case ATAPI_PROT_PIO
:
5267 ap
->hsm_task_state
= HSM_ST
;
5269 case ATAPI_PROT_NODATA
:
5270 ap
->hsm_task_state
= HSM_ST_LAST
;
5272 case ATAPI_PROT_DMA
:
5273 ap
->hsm_task_state
= HSM_ST_LAST
;
5274 /* initiate bmdma */
5275 ap
->ops
->bmdma_start(qc
);
5281 * __atapi_pio_bytes - Transfer data from/to the ATAPI device.
5282 * @qc: Command on going
5283 * @bytes: number of bytes
5285 * Transfer Transfer data from/to the ATAPI device.
5288 * Inherited from caller.
5291 static int __atapi_pio_bytes(struct ata_queued_cmd
*qc
, unsigned int bytes
)
5293 int rw
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
) ? WRITE
: READ
;
5294 struct ata_port
*ap
= qc
->ap
;
5295 struct ata_device
*dev
= qc
->dev
;
5296 struct ata_eh_info
*ehi
= &dev
->link
->eh_info
;
5297 struct scatterlist
*sg
;
5300 unsigned int offset
, count
, consumed
;
5304 if (unlikely(!sg
)) {
5305 ata_ehi_push_desc(ehi
, "unexpected or too much trailing data "
5306 "buf=%u cur=%u bytes=%u",
5307 qc
->nbytes
, qc
->curbytes
, bytes
);
5312 offset
= sg
->offset
+ qc
->cursg_ofs
;
5314 /* get the current page and offset */
5315 page
= nth_page(page
, (offset
>> PAGE_SHIFT
));
5316 offset
%= PAGE_SIZE
;
5318 /* don't overrun current sg */
5319 count
= min(sg
->length
- qc
->cursg_ofs
, bytes
);
5321 /* don't cross page boundaries */
5322 count
= min(count
, (unsigned int)PAGE_SIZE
- offset
);
5324 DPRINTK("data %s\n", qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
5326 if (PageHighMem(page
)) {
5327 unsigned long flags
;
5329 /* FIXME: use bounce buffer */
5330 local_irq_save(flags
);
5331 buf
= kmap_atomic(page
, KM_IRQ0
);
5333 /* do the actual data transfer */
5334 consumed
= ap
->ops
->data_xfer(dev
, buf
+ offset
, count
, rw
);
5336 kunmap_atomic(buf
, KM_IRQ0
);
5337 local_irq_restore(flags
);
5339 buf
= page_address(page
);
5340 consumed
= ap
->ops
->data_xfer(dev
, buf
+ offset
, count
, rw
);
5343 bytes
-= min(bytes
, consumed
);
5344 qc
->curbytes
+= count
;
5345 qc
->cursg_ofs
+= count
;
5347 if (qc
->cursg_ofs
== sg
->length
) {
5348 qc
->cursg
= sg_next(qc
->cursg
);
5352 /* consumed can be larger than count only for the last transfer */
5353 WARN_ON(qc
->cursg
&& count
!= consumed
);
5361 * atapi_pio_bytes - Transfer data from/to the ATAPI device.
5362 * @qc: Command on going
5364 * Transfer Transfer data from/to the ATAPI device.
5367 * Inherited from caller.
5370 static void atapi_pio_bytes(struct ata_queued_cmd
*qc
)
5372 struct ata_port
*ap
= qc
->ap
;
5373 struct ata_device
*dev
= qc
->dev
;
5374 struct ata_eh_info
*ehi
= &dev
->link
->eh_info
;
5375 unsigned int ireason
, bc_lo
, bc_hi
, bytes
;
5376 int i_write
, do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
) ? 1 : 0;
5378 /* Abuse qc->result_tf for temp storage of intermediate TF
5379 * here to save some kernel stack usage.
5380 * For normal completion, qc->result_tf is not relevant. For
5381 * error, qc->result_tf is later overwritten by ata_qc_complete().
5382 * So, the correctness of qc->result_tf is not affected.
5384 ap
->ops
->tf_read(ap
, &qc
->result_tf
);
5385 ireason
= qc
->result_tf
.nsect
;
5386 bc_lo
= qc
->result_tf
.lbam
;
5387 bc_hi
= qc
->result_tf
.lbah
;
5388 bytes
= (bc_hi
<< 8) | bc_lo
;
5390 /* shall be cleared to zero, indicating xfer of data */
5391 if (unlikely(ireason
& (1 << 0)))
5394 /* make sure transfer direction matches expected */
5395 i_write
= ((ireason
& (1 << 1)) == 0) ? 1 : 0;
5396 if (unlikely(do_write
!= i_write
))
5399 if (unlikely(!bytes
))
5402 VPRINTK("ata%u: xfering %d bytes\n", ap
->print_id
, bytes
);
5404 if (unlikely(__atapi_pio_bytes(qc
, bytes
)))
5406 ata_altstatus(ap
); /* flush */
5411 ata_ehi_push_desc(ehi
, "ATAPI check failed (ireason=0x%x bytes=%u)",
5414 qc
->err_mask
|= AC_ERR_HSM
;
5415 ap
->hsm_task_state
= HSM_ST_ERR
;
5419 * ata_hsm_ok_in_wq - Check if the qc can be handled in the workqueue.
5420 * @ap: the target ata_port
5424 * 1 if ok in workqueue, 0 otherwise.
5427 static inline int ata_hsm_ok_in_wq(struct ata_port
*ap
, struct ata_queued_cmd
*qc
)
5429 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
5432 if (ap
->hsm_task_state
== HSM_ST_FIRST
) {
5433 if (qc
->tf
.protocol
== ATA_PROT_PIO
&&
5434 (qc
->tf
.flags
& ATA_TFLAG_WRITE
))
5437 if (ata_is_atapi(qc
->tf
.protocol
) &&
5438 !(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
))
5446 * ata_hsm_qc_complete - finish a qc running on standard HSM
5447 * @qc: Command to complete
5448 * @in_wq: 1 if called from workqueue, 0 otherwise
5450 * Finish @qc which is running on standard HSM.
5453 * If @in_wq is zero, spin_lock_irqsave(host lock).
5454 * Otherwise, none on entry and grabs host lock.
5456 static void ata_hsm_qc_complete(struct ata_queued_cmd
*qc
, int in_wq
)
5458 struct ata_port
*ap
= qc
->ap
;
5459 unsigned long flags
;
5461 if (ap
->ops
->error_handler
) {
5463 spin_lock_irqsave(ap
->lock
, flags
);
5465 /* EH might have kicked in while host lock is
5468 qc
= ata_qc_from_tag(ap
, qc
->tag
);
5470 if (likely(!(qc
->err_mask
& AC_ERR_HSM
))) {
5471 ap
->ops
->irq_on(ap
);
5472 ata_qc_complete(qc
);
5474 ata_port_freeze(ap
);
5477 spin_unlock_irqrestore(ap
->lock
, flags
);
5479 if (likely(!(qc
->err_mask
& AC_ERR_HSM
)))
5480 ata_qc_complete(qc
);
5482 ata_port_freeze(ap
);
5486 spin_lock_irqsave(ap
->lock
, flags
);
5487 ap
->ops
->irq_on(ap
);
5488 ata_qc_complete(qc
);
5489 spin_unlock_irqrestore(ap
->lock
, flags
);
5491 ata_qc_complete(qc
);
5496 * ata_hsm_move - move the HSM to the next state.
5497 * @ap: the target ata_port
5499 * @status: current device status
5500 * @in_wq: 1 if called from workqueue, 0 otherwise
5503 * 1 when poll next status needed, 0 otherwise.
5505 int ata_hsm_move(struct ata_port
*ap
, struct ata_queued_cmd
*qc
,
5506 u8 status
, int in_wq
)
5508 unsigned long flags
= 0;
5511 WARN_ON((qc
->flags
& ATA_QCFLAG_ACTIVE
) == 0);
5513 /* Make sure ata_qc_issue_prot() does not throw things
5514 * like DMA polling into the workqueue. Notice that
5515 * in_wq is not equivalent to (qc->tf.flags & ATA_TFLAG_POLLING).
5517 WARN_ON(in_wq
!= ata_hsm_ok_in_wq(ap
, qc
));
5520 DPRINTK("ata%u: protocol %d task_state %d (dev_stat 0x%X)\n",
5521 ap
->print_id
, qc
->tf
.protocol
, ap
->hsm_task_state
, status
);
5523 switch (ap
->hsm_task_state
) {
5525 /* Send first data block or PACKET CDB */
5527 /* If polling, we will stay in the work queue after
5528 * sending the data. Otherwise, interrupt handler
5529 * takes over after sending the data.
5531 poll_next
= (qc
->tf
.flags
& ATA_TFLAG_POLLING
);
5533 /* check device status */
5534 if (unlikely((status
& ATA_DRQ
) == 0)) {
5535 /* handle BSY=0, DRQ=0 as error */
5536 if (likely(status
& (ATA_ERR
| ATA_DF
)))
5537 /* device stops HSM for abort/error */
5538 qc
->err_mask
|= AC_ERR_DEV
;
5540 /* HSM violation. Let EH handle this */
5541 qc
->err_mask
|= AC_ERR_HSM
;
5543 ap
->hsm_task_state
= HSM_ST_ERR
;
5547 /* Device should not ask for data transfer (DRQ=1)
5548 * when it finds something wrong.
5549 * We ignore DRQ here and stop the HSM by
5550 * changing hsm_task_state to HSM_ST_ERR and
5551 * let the EH abort the command or reset the device.
5553 if (unlikely(status
& (ATA_ERR
| ATA_DF
))) {
5554 /* Some ATAPI tape drives forget to clear the ERR bit
5555 * when doing the next command (mostly request sense).
5556 * We ignore ERR here to workaround and proceed sending
5559 if (!(qc
->dev
->horkage
& ATA_HORKAGE_STUCK_ERR
)) {
5560 ata_port_printk(ap
, KERN_WARNING
,
5561 "DRQ=1 with device error, "
5562 "dev_stat 0x%X\n", status
);
5563 qc
->err_mask
|= AC_ERR_HSM
;
5564 ap
->hsm_task_state
= HSM_ST_ERR
;
5569 /* Send the CDB (atapi) or the first data block (ata pio out).
5570 * During the state transition, interrupt handler shouldn't
5571 * be invoked before the data transfer is complete and
5572 * hsm_task_state is changed. Hence, the following locking.
5575 spin_lock_irqsave(ap
->lock
, flags
);
5577 if (qc
->tf
.protocol
== ATA_PROT_PIO
) {
5578 /* PIO data out protocol.
5579 * send first data block.
5582 /* ata_pio_sectors() might change the state
5583 * to HSM_ST_LAST. so, the state is changed here
5584 * before ata_pio_sectors().
5586 ap
->hsm_task_state
= HSM_ST
;
5587 ata_pio_sectors(qc
);
5590 atapi_send_cdb(ap
, qc
);
5593 spin_unlock_irqrestore(ap
->lock
, flags
);
5595 /* if polling, ata_pio_task() handles the rest.
5596 * otherwise, interrupt handler takes over from here.
5601 /* complete command or read/write the data register */
5602 if (qc
->tf
.protocol
== ATAPI_PROT_PIO
) {
5603 /* ATAPI PIO protocol */
5604 if ((status
& ATA_DRQ
) == 0) {
5605 /* No more data to transfer or device error.
5606 * Device error will be tagged in HSM_ST_LAST.
5608 ap
->hsm_task_state
= HSM_ST_LAST
;
5612 /* Device should not ask for data transfer (DRQ=1)
5613 * when it finds something wrong.
5614 * We ignore DRQ here and stop the HSM by
5615 * changing hsm_task_state to HSM_ST_ERR and
5616 * let the EH abort the command or reset the device.
5618 if (unlikely(status
& (ATA_ERR
| ATA_DF
))) {
5619 ata_port_printk(ap
, KERN_WARNING
, "DRQ=1 with "
5620 "device error, dev_stat 0x%X\n",
5622 qc
->err_mask
|= AC_ERR_HSM
;
5623 ap
->hsm_task_state
= HSM_ST_ERR
;
5627 atapi_pio_bytes(qc
);
5629 if (unlikely(ap
->hsm_task_state
== HSM_ST_ERR
))
5630 /* bad ireason reported by device */
5634 /* ATA PIO protocol */
5635 if (unlikely((status
& ATA_DRQ
) == 0)) {
5636 /* handle BSY=0, DRQ=0 as error */
5637 if (likely(status
& (ATA_ERR
| ATA_DF
)))
5638 /* device stops HSM for abort/error */
5639 qc
->err_mask
|= AC_ERR_DEV
;
5641 /* HSM violation. Let EH handle this.
5642 * Phantom devices also trigger this
5643 * condition. Mark hint.
5645 qc
->err_mask
|= AC_ERR_HSM
|
5648 ap
->hsm_task_state
= HSM_ST_ERR
;
5652 /* For PIO reads, some devices may ask for
5653 * data transfer (DRQ=1) alone with ERR=1.
5654 * We respect DRQ here and transfer one
5655 * block of junk data before changing the
5656 * hsm_task_state to HSM_ST_ERR.
5658 * For PIO writes, ERR=1 DRQ=1 doesn't make
5659 * sense since the data block has been
5660 * transferred to the device.
5662 if (unlikely(status
& (ATA_ERR
| ATA_DF
))) {
5663 /* data might be corrputed */
5664 qc
->err_mask
|= AC_ERR_DEV
;
5666 if (!(qc
->tf
.flags
& ATA_TFLAG_WRITE
)) {
5667 ata_pio_sectors(qc
);
5668 status
= ata_wait_idle(ap
);
5671 if (status
& (ATA_BUSY
| ATA_DRQ
))
5672 qc
->err_mask
|= AC_ERR_HSM
;
5674 /* ata_pio_sectors() might change the
5675 * state to HSM_ST_LAST. so, the state
5676 * is changed after ata_pio_sectors().
5678 ap
->hsm_task_state
= HSM_ST_ERR
;
5682 ata_pio_sectors(qc
);
5684 if (ap
->hsm_task_state
== HSM_ST_LAST
&&
5685 (!(qc
->tf
.flags
& ATA_TFLAG_WRITE
))) {
5687 status
= ata_wait_idle(ap
);
5696 if (unlikely(!ata_ok(status
))) {
5697 qc
->err_mask
|= __ac_err_mask(status
);
5698 ap
->hsm_task_state
= HSM_ST_ERR
;
5702 /* no more data to transfer */
5703 DPRINTK("ata%u: dev %u command complete, drv_stat 0x%x\n",
5704 ap
->print_id
, qc
->dev
->devno
, status
);
5706 WARN_ON(qc
->err_mask
);
5708 ap
->hsm_task_state
= HSM_ST_IDLE
;
5710 /* complete taskfile transaction */
5711 ata_hsm_qc_complete(qc
, in_wq
);
5717 /* make sure qc->err_mask is available to
5718 * know what's wrong and recover
5720 WARN_ON(qc
->err_mask
== 0);
5722 ap
->hsm_task_state
= HSM_ST_IDLE
;
5724 /* complete taskfile transaction */
5725 ata_hsm_qc_complete(qc
, in_wq
);
5737 static void ata_pio_task(struct work_struct
*work
)
5739 struct ata_port
*ap
=
5740 container_of(work
, struct ata_port
, port_task
.work
);
5741 struct ata_queued_cmd
*qc
= ap
->port_task_data
;
5746 WARN_ON(ap
->hsm_task_state
== HSM_ST_IDLE
);
5749 * This is purely heuristic. This is a fast path.
5750 * Sometimes when we enter, BSY will be cleared in
5751 * a chk-status or two. If not, the drive is probably seeking
5752 * or something. Snooze for a couple msecs, then
5753 * chk-status again. If still busy, queue delayed work.
5755 status
= ata_busy_wait(ap
, ATA_BUSY
, 5);
5756 if (status
& ATA_BUSY
) {
5758 status
= ata_busy_wait(ap
, ATA_BUSY
, 10);
5759 if (status
& ATA_BUSY
) {
5760 ata_pio_queue_task(ap
, qc
, ATA_SHORT_PAUSE
);
5766 poll_next
= ata_hsm_move(ap
, qc
, status
, 1);
5768 /* another command or interrupt handler
5769 * may be running at this point.
5776 * ata_qc_new - Request an available ATA command, for queueing
5777 * @ap: Port associated with device @dev
5778 * @dev: Device from whom we request an available command structure
5784 static struct ata_queued_cmd
*ata_qc_new(struct ata_port
*ap
)
5786 struct ata_queued_cmd
*qc
= NULL
;
5789 /* no command while frozen */
5790 if (unlikely(ap
->pflags
& ATA_PFLAG_FROZEN
))
5793 /* the last tag is reserved for internal command. */
5794 for (i
= 0; i
< ATA_MAX_QUEUE
- 1; i
++)
5795 if (!test_and_set_bit(i
, &ap
->qc_allocated
)) {
5796 qc
= __ata_qc_from_tag(ap
, i
);
5807 * ata_qc_new_init - Request an available ATA command, and initialize it
5808 * @dev: Device from whom we request an available command structure
5814 struct ata_queued_cmd
*ata_qc_new_init(struct ata_device
*dev
)
5816 struct ata_port
*ap
= dev
->link
->ap
;
5817 struct ata_queued_cmd
*qc
;
5819 qc
= ata_qc_new(ap
);
5832 * ata_qc_free - free unused ata_queued_cmd
5833 * @qc: Command to complete
5835 * Designed to free unused ata_queued_cmd object
5836 * in case something prevents using it.
5839 * spin_lock_irqsave(host lock)
5841 void ata_qc_free(struct ata_queued_cmd
*qc
)
5843 struct ata_port
*ap
= qc
->ap
;
5846 WARN_ON(qc
== NULL
); /* ata_qc_from_tag _might_ return NULL */
5850 if (likely(ata_tag_valid(tag
))) {
5851 qc
->tag
= ATA_TAG_POISON
;
5852 clear_bit(tag
, &ap
->qc_allocated
);
5856 void __ata_qc_complete(struct ata_queued_cmd
*qc
)
5858 struct ata_port
*ap
= qc
->ap
;
5859 struct ata_link
*link
= qc
->dev
->link
;
5861 WARN_ON(qc
== NULL
); /* ata_qc_from_tag _might_ return NULL */
5862 WARN_ON(!(qc
->flags
& ATA_QCFLAG_ACTIVE
));
5864 if (likely(qc
->flags
& ATA_QCFLAG_DMAMAP
))
5867 /* command should be marked inactive atomically with qc completion */
5868 if (qc
->tf
.protocol
== ATA_PROT_NCQ
) {
5869 link
->sactive
&= ~(1 << qc
->tag
);
5871 ap
->nr_active_links
--;
5873 link
->active_tag
= ATA_TAG_POISON
;
5874 ap
->nr_active_links
--;
5877 /* clear exclusive status */
5878 if (unlikely(qc
->flags
& ATA_QCFLAG_CLEAR_EXCL
&&
5879 ap
->excl_link
== link
))
5880 ap
->excl_link
= NULL
;
5882 /* atapi: mark qc as inactive to prevent the interrupt handler
5883 * from completing the command twice later, before the error handler
5884 * is called. (when rc != 0 and atapi request sense is needed)
5886 qc
->flags
&= ~ATA_QCFLAG_ACTIVE
;
5887 ap
->qc_active
&= ~(1 << qc
->tag
);
5889 /* call completion callback */
5890 qc
->complete_fn(qc
);
5893 static void fill_result_tf(struct ata_queued_cmd
*qc
)
5895 struct ata_port
*ap
= qc
->ap
;
5897 qc
->result_tf
.flags
= qc
->tf
.flags
;
5898 ap
->ops
->tf_read(ap
, &qc
->result_tf
);
5901 static void ata_verify_xfer(struct ata_queued_cmd
*qc
)
5903 struct ata_device
*dev
= qc
->dev
;
5905 if (ata_tag_internal(qc
->tag
))
5908 if (ata_is_nodata(qc
->tf
.protocol
))
5911 if ((dev
->mwdma_mask
|| dev
->udma_mask
) && ata_is_pio(qc
->tf
.protocol
))
5914 dev
->flags
&= ~ATA_DFLAG_DUBIOUS_XFER
;
5918 * ata_qc_complete - Complete an active ATA command
5919 * @qc: Command to complete
5920 * @err_mask: ATA Status register contents
5922 * Indicate to the mid and upper layers that an ATA
5923 * command has completed, with either an ok or not-ok status.
5926 * spin_lock_irqsave(host lock)
5928 void ata_qc_complete(struct ata_queued_cmd
*qc
)
5930 struct ata_port
*ap
= qc
->ap
;
5932 /* XXX: New EH and old EH use different mechanisms to
5933 * synchronize EH with regular execution path.
5935 * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED.
5936 * Normal execution path is responsible for not accessing a
5937 * failed qc. libata core enforces the rule by returning NULL
5938 * from ata_qc_from_tag() for failed qcs.
5940 * Old EH depends on ata_qc_complete() nullifying completion
5941 * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does
5942 * not synchronize with interrupt handler. Only PIO task is
5945 if (ap
->ops
->error_handler
) {
5946 struct ata_device
*dev
= qc
->dev
;
5947 struct ata_eh_info
*ehi
= &dev
->link
->eh_info
;
5949 WARN_ON(ap
->pflags
& ATA_PFLAG_FROZEN
);
5951 if (unlikely(qc
->err_mask
))
5952 qc
->flags
|= ATA_QCFLAG_FAILED
;
5954 if (unlikely(qc
->flags
& ATA_QCFLAG_FAILED
)) {
5955 if (!ata_tag_internal(qc
->tag
)) {
5956 /* always fill result TF for failed qc */
5958 ata_qc_schedule_eh(qc
);
5963 /* read result TF if requested */
5964 if (qc
->flags
& ATA_QCFLAG_RESULT_TF
)
5967 /* Some commands need post-processing after successful
5970 switch (qc
->tf
.command
) {
5971 case ATA_CMD_SET_FEATURES
:
5972 if (qc
->tf
.feature
!= SETFEATURES_WC_ON
&&
5973 qc
->tf
.feature
!= SETFEATURES_WC_OFF
)
5976 case ATA_CMD_INIT_DEV_PARAMS
: /* CHS translation changed */
5977 case ATA_CMD_SET_MULTI
: /* multi_count changed */
5978 /* revalidate device */
5979 ehi
->dev_action
[dev
->devno
] |= ATA_EH_REVALIDATE
;
5980 ata_port_schedule_eh(ap
);
5984 dev
->flags
|= ATA_DFLAG_SLEEPING
;
5988 if (unlikely(dev
->flags
& ATA_DFLAG_DUBIOUS_XFER
))
5989 ata_verify_xfer(qc
);
5991 __ata_qc_complete(qc
);
5993 if (qc
->flags
& ATA_QCFLAG_EH_SCHEDULED
)
5996 /* read result TF if failed or requested */
5997 if (qc
->err_mask
|| qc
->flags
& ATA_QCFLAG_RESULT_TF
)
6000 __ata_qc_complete(qc
);
6005 * ata_qc_complete_multiple - Complete multiple qcs successfully
6006 * @ap: port in question
6007 * @qc_active: new qc_active mask
6008 * @finish_qc: LLDD callback invoked before completing a qc
6010 * Complete in-flight commands. This functions is meant to be
6011 * called from low-level driver's interrupt routine to complete
6012 * requests normally. ap->qc_active and @qc_active is compared
6013 * and commands are completed accordingly.
6016 * spin_lock_irqsave(host lock)
6019 * Number of completed commands on success, -errno otherwise.
6021 int ata_qc_complete_multiple(struct ata_port
*ap
, u32 qc_active
,
6022 void (*finish_qc
)(struct ata_queued_cmd
*))
6028 done_mask
= ap
->qc_active
^ qc_active
;
6030 if (unlikely(done_mask
& qc_active
)) {
6031 ata_port_printk(ap
, KERN_ERR
, "illegal qc_active transition "
6032 "(%08x->%08x)\n", ap
->qc_active
, qc_active
);
6036 for (i
= 0; i
< ATA_MAX_QUEUE
; i
++) {
6037 struct ata_queued_cmd
*qc
;
6039 if (!(done_mask
& (1 << i
)))
6042 if ((qc
= ata_qc_from_tag(ap
, i
))) {
6045 ata_qc_complete(qc
);
6054 * ata_qc_issue - issue taskfile to device
6055 * @qc: command to issue to device
6057 * Prepare an ATA command to submission to device.
6058 * This includes mapping the data into a DMA-able
6059 * area, filling in the S/G table, and finally
6060 * writing the taskfile to hardware, starting the command.
6063 * spin_lock_irqsave(host lock)
6065 void ata_qc_issue(struct ata_queued_cmd
*qc
)
6067 struct ata_port
*ap
= qc
->ap
;
6068 struct ata_link
*link
= qc
->dev
->link
;
6069 u8 prot
= qc
->tf
.protocol
;
6071 /* Make sure only one non-NCQ command is outstanding. The
6072 * check is skipped for old EH because it reuses active qc to
6073 * request ATAPI sense.
6075 WARN_ON(ap
->ops
->error_handler
&& ata_tag_valid(link
->active_tag
));
6077 if (ata_is_ncq(prot
)) {
6078 WARN_ON(link
->sactive
& (1 << qc
->tag
));
6081 ap
->nr_active_links
++;
6082 link
->sactive
|= 1 << qc
->tag
;
6084 WARN_ON(link
->sactive
);
6086 ap
->nr_active_links
++;
6087 link
->active_tag
= qc
->tag
;
6090 qc
->flags
|= ATA_QCFLAG_ACTIVE
;
6091 ap
->qc_active
|= 1 << qc
->tag
;
6093 /* We guarantee to LLDs that they will have at least one
6094 * non-zero sg if the command is a data command.
6096 BUG_ON(ata_is_data(prot
) && (!qc
->sg
|| !qc
->n_elem
|| !qc
->nbytes
));
6098 if (ata_is_dma(prot
) || (ata_is_pio(prot
) &&
6099 (ap
->flags
& ATA_FLAG_PIO_DMA
)))
6100 if (ata_sg_setup(qc
))
6103 /* if device is sleeping, schedule reset and abort the link */
6104 if (unlikely(qc
->dev
->flags
& ATA_DFLAG_SLEEPING
)) {
6105 link
->eh_info
.action
|= ATA_EH_RESET
;
6106 ata_ehi_push_desc(&link
->eh_info
, "waking up from sleep");
6107 ata_link_abort(link
);
6111 ap
->ops
->qc_prep(qc
);
6113 qc
->err_mask
|= ap
->ops
->qc_issue(qc
);
6114 if (unlikely(qc
->err_mask
))
6119 qc
->err_mask
|= AC_ERR_SYSTEM
;
6121 ata_qc_complete(qc
);
6125 * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner
6126 * @qc: command to issue to device
6128 * Using various libata functions and hooks, this function
6129 * starts an ATA command. ATA commands are grouped into
6130 * classes called "protocols", and issuing each type of protocol
6131 * is slightly different.
6133 * May be used as the qc_issue() entry in ata_port_operations.
6136 * spin_lock_irqsave(host lock)
6139 * Zero on success, AC_ERR_* mask on failure
6142 unsigned int ata_qc_issue_prot(struct ata_queued_cmd
*qc
)
6144 struct ata_port
*ap
= qc
->ap
;
6146 /* Use polling pio if the LLD doesn't handle
6147 * interrupt driven pio and atapi CDB interrupt.
6149 if (ap
->flags
& ATA_FLAG_PIO_POLLING
) {
6150 switch (qc
->tf
.protocol
) {
6152 case ATA_PROT_NODATA
:
6153 case ATAPI_PROT_PIO
:
6154 case ATAPI_PROT_NODATA
:
6155 qc
->tf
.flags
|= ATA_TFLAG_POLLING
;
6157 case ATAPI_PROT_DMA
:
6158 if (qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
)
6159 /* see ata_dma_blacklisted() */
6167 /* select the device */
6168 ata_dev_select(ap
, qc
->dev
->devno
, 1, 0);
6170 /* start the command */
6171 switch (qc
->tf
.protocol
) {
6172 case ATA_PROT_NODATA
:
6173 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
6174 ata_qc_set_polling(qc
);
6176 ata_tf_to_host(ap
, &qc
->tf
);
6177 ap
->hsm_task_state
= HSM_ST_LAST
;
6179 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
6180 ata_pio_queue_task(ap
, qc
, 0);
6185 WARN_ON(qc
->tf
.flags
& ATA_TFLAG_POLLING
);
6187 ap
->ops
->tf_load(ap
, &qc
->tf
); /* load tf registers */
6188 ap
->ops
->bmdma_setup(qc
); /* set up bmdma */
6189 ap
->ops
->bmdma_start(qc
); /* initiate bmdma */
6190 ap
->hsm_task_state
= HSM_ST_LAST
;
6194 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
6195 ata_qc_set_polling(qc
);
6197 ata_tf_to_host(ap
, &qc
->tf
);
6199 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
) {
6200 /* PIO data out protocol */
6201 ap
->hsm_task_state
= HSM_ST_FIRST
;
6202 ata_pio_queue_task(ap
, qc
, 0);
6204 /* always send first data block using
6205 * the ata_pio_task() codepath.
6208 /* PIO data in protocol */
6209 ap
->hsm_task_state
= HSM_ST
;
6211 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
6212 ata_pio_queue_task(ap
, qc
, 0);
6214 /* if polling, ata_pio_task() handles the rest.
6215 * otherwise, interrupt handler takes over from here.
6221 case ATAPI_PROT_PIO
:
6222 case ATAPI_PROT_NODATA
:
6223 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
6224 ata_qc_set_polling(qc
);
6226 ata_tf_to_host(ap
, &qc
->tf
);
6228 ap
->hsm_task_state
= HSM_ST_FIRST
;
6230 /* send cdb by polling if no cdb interrupt */
6231 if ((!(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
)) ||
6232 (qc
->tf
.flags
& ATA_TFLAG_POLLING
))
6233 ata_pio_queue_task(ap
, qc
, 0);
6236 case ATAPI_PROT_DMA
:
6237 WARN_ON(qc
->tf
.flags
& ATA_TFLAG_POLLING
);
6239 ap
->ops
->tf_load(ap
, &qc
->tf
); /* load tf registers */
6240 ap
->ops
->bmdma_setup(qc
); /* set up bmdma */
6241 ap
->hsm_task_state
= HSM_ST_FIRST
;
6243 /* send cdb by polling if no cdb interrupt */
6244 if (!(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
))
6245 ata_pio_queue_task(ap
, qc
, 0);
6250 return AC_ERR_SYSTEM
;
6257 * ata_host_intr - Handle host interrupt for given (port, task)
6258 * @ap: Port on which interrupt arrived (possibly...)
6259 * @qc: Taskfile currently active in engine
6261 * Handle host interrupt for given queued command. Currently,
6262 * only DMA interrupts are handled. All other commands are
6263 * handled via polling with interrupts disabled (nIEN bit).
6266 * spin_lock_irqsave(host lock)
6269 * One if interrupt was handled, zero if not (shared irq).
6272 inline unsigned int ata_host_intr(struct ata_port
*ap
,
6273 struct ata_queued_cmd
*qc
)
6275 struct ata_eh_info
*ehi
= &ap
->link
.eh_info
;
6276 u8 status
, host_stat
= 0;
6278 VPRINTK("ata%u: protocol %d task_state %d\n",
6279 ap
->print_id
, qc
->tf
.protocol
, ap
->hsm_task_state
);
6281 /* Check whether we are expecting interrupt in this state */
6282 switch (ap
->hsm_task_state
) {
6284 /* Some pre-ATAPI-4 devices assert INTRQ
6285 * at this state when ready to receive CDB.
6288 /* Check the ATA_DFLAG_CDB_INTR flag is enough here.
6289 * The flag was turned on only for atapi devices. No
6290 * need to check ata_is_atapi(qc->tf.protocol) again.
6292 if (!(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
))
6296 if (qc
->tf
.protocol
== ATA_PROT_DMA
||
6297 qc
->tf
.protocol
== ATAPI_PROT_DMA
) {
6298 /* check status of DMA engine */
6299 host_stat
= ap
->ops
->bmdma_status(ap
);
6300 VPRINTK("ata%u: host_stat 0x%X\n",
6301 ap
->print_id
, host_stat
);
6303 /* if it's not our irq... */
6304 if (!(host_stat
& ATA_DMA_INTR
))
6307 /* before we do anything else, clear DMA-Start bit */
6308 ap
->ops
->bmdma_stop(qc
);
6310 if (unlikely(host_stat
& ATA_DMA_ERR
)) {
6311 /* error when transfering data to/from memory */
6312 qc
->err_mask
|= AC_ERR_HOST_BUS
;
6313 ap
->hsm_task_state
= HSM_ST_ERR
;
6323 /* check altstatus */
6324 status
= ata_altstatus(ap
);
6325 if (status
& ATA_BUSY
)
6328 /* check main status, clearing INTRQ */
6329 status
= ata_chk_status(ap
);
6330 if (unlikely(status
& ATA_BUSY
))
6333 /* ack bmdma irq events */
6334 ap
->ops
->irq_clear(ap
);
6336 ata_hsm_move(ap
, qc
, status
, 0);
6338 if (unlikely(qc
->err_mask
) && (qc
->tf
.protocol
== ATA_PROT_DMA
||
6339 qc
->tf
.protocol
== ATAPI_PROT_DMA
))
6340 ata_ehi_push_desc(ehi
, "BMDMA stat 0x%x", host_stat
);
6342 return 1; /* irq handled */
6345 ap
->stats
.idle_irq
++;
6348 if ((ap
->stats
.idle_irq
% 1000) == 0) {
6350 ap
->ops
->irq_clear(ap
);
6351 ata_port_printk(ap
, KERN_WARNING
, "irq trap\n");
6355 return 0; /* irq not handled */
6359 * ata_interrupt - Default ATA host interrupt handler
6360 * @irq: irq line (unused)
6361 * @dev_instance: pointer to our ata_host information structure
6363 * Default interrupt handler for PCI IDE devices. Calls
6364 * ata_host_intr() for each port that is not disabled.
6367 * Obtains host lock during operation.
6370 * IRQ_NONE or IRQ_HANDLED.
6373 irqreturn_t
ata_interrupt(int irq
, void *dev_instance
)
6375 struct ata_host
*host
= dev_instance
;
6377 unsigned int handled
= 0;
6378 unsigned long flags
;
6380 /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */
6381 spin_lock_irqsave(&host
->lock
, flags
);
6383 for (i
= 0; i
< host
->n_ports
; i
++) {
6384 struct ata_port
*ap
;
6386 ap
= host
->ports
[i
];
6388 !(ap
->flags
& ATA_FLAG_DISABLED
)) {
6389 struct ata_queued_cmd
*qc
;
6391 qc
= ata_qc_from_tag(ap
, ap
->link
.active_tag
);
6392 if (qc
&& (!(qc
->tf
.flags
& ATA_TFLAG_POLLING
)) &&
6393 (qc
->flags
& ATA_QCFLAG_ACTIVE
))
6394 handled
|= ata_host_intr(ap
, qc
);
6398 spin_unlock_irqrestore(&host
->lock
, flags
);
6400 return IRQ_RETVAL(handled
);
6404 * sata_scr_valid - test whether SCRs are accessible
6405 * @link: ATA link to test SCR accessibility for
6407 * Test whether SCRs are accessible for @link.
6413 * 1 if SCRs are accessible, 0 otherwise.
6415 int sata_scr_valid(struct ata_link
*link
)
6417 struct ata_port
*ap
= link
->ap
;
6419 return (ap
->flags
& ATA_FLAG_SATA
) && ap
->ops
->scr_read
;
6423 * sata_scr_read - read SCR register of the specified port
6424 * @link: ATA link to read SCR for
6426 * @val: Place to store read value
6428 * Read SCR register @reg of @link into *@val. This function is
6429 * guaranteed to succeed if @link is ap->link, the cable type of
6430 * the port is SATA and the port implements ->scr_read.
6433 * None if @link is ap->link. Kernel thread context otherwise.
6436 * 0 on success, negative errno on failure.
6438 int sata_scr_read(struct ata_link
*link
, int reg
, u32
*val
)
6440 if (ata_is_host_link(link
)) {
6441 struct ata_port
*ap
= link
->ap
;
6443 if (sata_scr_valid(link
))
6444 return ap
->ops
->scr_read(ap
, reg
, val
);
6448 return sata_pmp_scr_read(link
, reg
, val
);
6452 * sata_scr_write - write SCR register of the specified port
6453 * @link: ATA link to write SCR for
6454 * @reg: SCR to write
6455 * @val: value to write
6457 * Write @val to SCR register @reg of @link. This function is
6458 * guaranteed to succeed if @link is ap->link, the cable type of
6459 * the port is SATA and the port implements ->scr_read.
6462 * None if @link is ap->link. Kernel thread context otherwise.
6465 * 0 on success, negative errno on failure.
6467 int sata_scr_write(struct ata_link
*link
, int reg
, u32 val
)
6469 if (ata_is_host_link(link
)) {
6470 struct ata_port
*ap
= link
->ap
;
6472 if (sata_scr_valid(link
))
6473 return ap
->ops
->scr_write(ap
, reg
, val
);
6477 return sata_pmp_scr_write(link
, reg
, val
);
6481 * sata_scr_write_flush - write SCR register of the specified port and flush
6482 * @link: ATA link to write SCR for
6483 * @reg: SCR to write
6484 * @val: value to write
6486 * This function is identical to sata_scr_write() except that this
6487 * function performs flush after writing to the register.
6490 * None if @link is ap->link. Kernel thread context otherwise.
6493 * 0 on success, negative errno on failure.
6495 int sata_scr_write_flush(struct ata_link
*link
, int reg
, u32 val
)
6497 if (ata_is_host_link(link
)) {
6498 struct ata_port
*ap
= link
->ap
;
6501 if (sata_scr_valid(link
)) {
6502 rc
= ap
->ops
->scr_write(ap
, reg
, val
);
6504 rc
= ap
->ops
->scr_read(ap
, reg
, &val
);
6510 return sata_pmp_scr_write(link
, reg
, val
);
6514 * ata_link_online - test whether the given link is online
6515 * @link: ATA link to test
6517 * Test whether @link is online. Note that this function returns
6518 * 0 if online status of @link cannot be obtained, so
6519 * ata_link_online(link) != !ata_link_offline(link).
6525 * 1 if the port online status is available and online.
6527 int ata_link_online(struct ata_link
*link
)
6531 if (sata_scr_read(link
, SCR_STATUS
, &sstatus
) == 0 &&
6532 (sstatus
& 0xf) == 0x3)
6538 * ata_link_offline - test whether the given link is offline
6539 * @link: ATA link to test
6541 * Test whether @link is offline. Note that this function
6542 * returns 0 if offline status of @link cannot be obtained, so
6543 * ata_link_online(link) != !ata_link_offline(link).
6549 * 1 if the port offline status is available and offline.
6551 int ata_link_offline(struct ata_link
*link
)
6555 if (sata_scr_read(link
, SCR_STATUS
, &sstatus
) == 0 &&
6556 (sstatus
& 0xf) != 0x3)
6561 int ata_flush_cache(struct ata_device
*dev
)
6563 unsigned int err_mask
;
6566 if (!ata_try_flush_cache(dev
))
6569 if (dev
->flags
& ATA_DFLAG_FLUSH_EXT
)
6570 cmd
= ATA_CMD_FLUSH_EXT
;
6572 cmd
= ATA_CMD_FLUSH
;
6574 /* This is wrong. On a failed flush we get back the LBA of the lost
6575 sector and we should (assuming it wasn't aborted as unknown) issue
6576 a further flush command to continue the writeback until it
6578 err_mask
= ata_do_simple_cmd(dev
, cmd
);
6580 ata_dev_printk(dev
, KERN_ERR
, "failed to flush cache\n");
6588 static int ata_host_request_pm(struct ata_host
*host
, pm_message_t mesg
,
6589 unsigned int action
, unsigned int ehi_flags
,
6592 unsigned long flags
;
6595 for (i
= 0; i
< host
->n_ports
; i
++) {
6596 struct ata_port
*ap
= host
->ports
[i
];
6597 struct ata_link
*link
;
6599 /* Previous resume operation might still be in
6600 * progress. Wait for PM_PENDING to clear.
6602 if (ap
->pflags
& ATA_PFLAG_PM_PENDING
) {
6603 ata_port_wait_eh(ap
);
6604 WARN_ON(ap
->pflags
& ATA_PFLAG_PM_PENDING
);
6607 /* request PM ops to EH */
6608 spin_lock_irqsave(ap
->lock
, flags
);
6613 ap
->pm_result
= &rc
;
6616 ap
->pflags
|= ATA_PFLAG_PM_PENDING
;
6617 __ata_port_for_each_link(link
, ap
) {
6618 link
->eh_info
.action
|= action
;
6619 link
->eh_info
.flags
|= ehi_flags
;
6622 ata_port_schedule_eh(ap
);
6624 spin_unlock_irqrestore(ap
->lock
, flags
);
6626 /* wait and check result */
6628 ata_port_wait_eh(ap
);
6629 WARN_ON(ap
->pflags
& ATA_PFLAG_PM_PENDING
);
6639 * ata_host_suspend - suspend host
6640 * @host: host to suspend
6643 * Suspend @host. Actual operation is performed by EH. This
6644 * function requests EH to perform PM operations and waits for EH
6648 * Kernel thread context (may sleep).
6651 * 0 on success, -errno on failure.
6653 int ata_host_suspend(struct ata_host
*host
, pm_message_t mesg
)
6658 * disable link pm on all ports before requesting
6661 ata_lpm_enable(host
);
6663 rc
= ata_host_request_pm(host
, mesg
, 0, ATA_EHI_QUIET
, 1);
6665 host
->dev
->power
.power_state
= mesg
;
6670 * ata_host_resume - resume host
6671 * @host: host to resume
6673 * Resume @host. Actual operation is performed by EH. This
6674 * function requests EH to perform PM operations and returns.
6675 * Note that all resume operations are performed parallely.
6678 * Kernel thread context (may sleep).
6680 void ata_host_resume(struct ata_host
*host
)
6682 ata_host_request_pm(host
, PMSG_ON
, ATA_EH_RESET
,
6683 ATA_EHI_NO_AUTOPSY
| ATA_EHI_QUIET
, 0);
6684 host
->dev
->power
.power_state
= PMSG_ON
;
6686 /* reenable link pm */
6687 ata_lpm_disable(host
);
6692 * ata_port_start - Set port up for dma.
6693 * @ap: Port to initialize
6695 * Called just after data structures for each port are
6696 * initialized. Allocates space for PRD table.
6698 * May be used as the port_start() entry in ata_port_operations.
6701 * Inherited from caller.
6703 int ata_port_start(struct ata_port
*ap
)
6705 struct device
*dev
= ap
->dev
;
6707 ap
->prd
= dmam_alloc_coherent(dev
, ATA_PRD_TBL_SZ
, &ap
->prd_dma
,
6716 * ata_dev_init - Initialize an ata_device structure
6717 * @dev: Device structure to initialize
6719 * Initialize @dev in preparation for probing.
6722 * Inherited from caller.
6724 void ata_dev_init(struct ata_device
*dev
)
6726 struct ata_link
*link
= dev
->link
;
6727 struct ata_port
*ap
= link
->ap
;
6728 unsigned long flags
;
6730 /* SATA spd limit is bound to the first device */
6731 link
->sata_spd_limit
= link
->hw_sata_spd_limit
;
6734 /* High bits of dev->flags are used to record warm plug
6735 * requests which occur asynchronously. Synchronize using
6738 spin_lock_irqsave(ap
->lock
, flags
);
6739 dev
->flags
&= ~ATA_DFLAG_INIT_MASK
;
6741 spin_unlock_irqrestore(ap
->lock
, flags
);
6743 memset((void *)dev
+ ATA_DEVICE_CLEAR_OFFSET
, 0,
6744 sizeof(*dev
) - ATA_DEVICE_CLEAR_OFFSET
);
6745 dev
->pio_mask
= UINT_MAX
;
6746 dev
->mwdma_mask
= UINT_MAX
;
6747 dev
->udma_mask
= UINT_MAX
;
6751 * ata_link_init - Initialize an ata_link structure
6752 * @ap: ATA port link is attached to
6753 * @link: Link structure to initialize
6754 * @pmp: Port multiplier port number
6759 * Kernel thread context (may sleep)
6761 void ata_link_init(struct ata_port
*ap
, struct ata_link
*link
, int pmp
)
6765 /* clear everything except for devices */
6766 memset(link
, 0, offsetof(struct ata_link
, device
[0]));
6770 link
->active_tag
= ATA_TAG_POISON
;
6771 link
->hw_sata_spd_limit
= UINT_MAX
;
6773 /* can't use iterator, ap isn't initialized yet */
6774 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
6775 struct ata_device
*dev
= &link
->device
[i
];
6778 dev
->devno
= dev
- link
->device
;
6784 * sata_link_init_spd - Initialize link->sata_spd_limit
6785 * @link: Link to configure sata_spd_limit for
6787 * Initialize @link->[hw_]sata_spd_limit to the currently
6791 * Kernel thread context (may sleep).
6794 * 0 on success, -errno on failure.
6796 int sata_link_init_spd(struct ata_link
*link
)
6802 rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
);
6806 spd
= (scontrol
>> 4) & 0xf;
6808 link
->hw_sata_spd_limit
&= (1 << spd
) - 1;
6810 ata_force_spd_limit(link
);
6812 link
->sata_spd_limit
= link
->hw_sata_spd_limit
;
6818 * ata_port_alloc - allocate and initialize basic ATA port resources
6819 * @host: ATA host this allocated port belongs to
6821 * Allocate and initialize basic ATA port resources.
6824 * Allocate ATA port on success, NULL on failure.
6827 * Inherited from calling layer (may sleep).
6829 struct ata_port
*ata_port_alloc(struct ata_host
*host
)
6831 struct ata_port
*ap
;
6835 ap
= kzalloc(sizeof(*ap
), GFP_KERNEL
);
6839 ap
->pflags
|= ATA_PFLAG_INITIALIZING
;
6840 ap
->lock
= &host
->lock
;
6841 ap
->flags
= ATA_FLAG_DISABLED
;
6843 ap
->ctl
= ATA_DEVCTL_OBS
;
6845 ap
->dev
= host
->dev
;
6846 ap
->last_ctl
= 0xFF;
6848 #if defined(ATA_VERBOSE_DEBUG)
6849 /* turn on all debugging levels */
6850 ap
->msg_enable
= 0x00FF;
6851 #elif defined(ATA_DEBUG)
6852 ap
->msg_enable
= ATA_MSG_DRV
| ATA_MSG_INFO
| ATA_MSG_CTL
| ATA_MSG_WARN
| ATA_MSG_ERR
;
6854 ap
->msg_enable
= ATA_MSG_DRV
| ATA_MSG_ERR
| ATA_MSG_WARN
;
6857 INIT_DELAYED_WORK(&ap
->port_task
, ata_pio_task
);
6858 INIT_DELAYED_WORK(&ap
->hotplug_task
, ata_scsi_hotplug
);
6859 INIT_WORK(&ap
->scsi_rescan_task
, ata_scsi_dev_rescan
);
6860 INIT_LIST_HEAD(&ap
->eh_done_q
);
6861 init_waitqueue_head(&ap
->eh_wait_q
);
6862 init_timer_deferrable(&ap
->fastdrain_timer
);
6863 ap
->fastdrain_timer
.function
= ata_eh_fastdrain_timerfn
;
6864 ap
->fastdrain_timer
.data
= (unsigned long)ap
;
6866 ap
->cbl
= ATA_CBL_NONE
;
6868 ata_link_init(ap
, &ap
->link
, 0);
6871 ap
->stats
.unhandled_irq
= 1;
6872 ap
->stats
.idle_irq
= 1;
6877 static void ata_host_release(struct device
*gendev
, void *res
)
6879 struct ata_host
*host
= dev_get_drvdata(gendev
);
6882 for (i
= 0; i
< host
->n_ports
; i
++) {
6883 struct ata_port
*ap
= host
->ports
[i
];
6889 scsi_host_put(ap
->scsi_host
);
6891 kfree(ap
->pmp_link
);
6893 host
->ports
[i
] = NULL
;
6896 dev_set_drvdata(gendev
, NULL
);
6900 * ata_host_alloc - allocate and init basic ATA host resources
6901 * @dev: generic device this host is associated with
6902 * @max_ports: maximum number of ATA ports associated with this host
6904 * Allocate and initialize basic ATA host resources. LLD calls
6905 * this function to allocate a host, initializes it fully and
6906 * attaches it using ata_host_register().
6908 * @max_ports ports are allocated and host->n_ports is
6909 * initialized to @max_ports. The caller is allowed to decrease
6910 * host->n_ports before calling ata_host_register(). The unused
6911 * ports will be automatically freed on registration.
6914 * Allocate ATA host on success, NULL on failure.
6917 * Inherited from calling layer (may sleep).
6919 struct ata_host
*ata_host_alloc(struct device
*dev
, int max_ports
)
6921 struct ata_host
*host
;
6927 if (!devres_open_group(dev
, NULL
, GFP_KERNEL
))
6930 /* alloc a container for our list of ATA ports (buses) */
6931 sz
= sizeof(struct ata_host
) + (max_ports
+ 1) * sizeof(void *);
6932 /* alloc a container for our list of ATA ports (buses) */
6933 host
= devres_alloc(ata_host_release
, sz
, GFP_KERNEL
);
6937 devres_add(dev
, host
);
6938 dev_set_drvdata(dev
, host
);
6940 spin_lock_init(&host
->lock
);
6942 host
->n_ports
= max_ports
;
6944 /* allocate ports bound to this host */
6945 for (i
= 0; i
< max_ports
; i
++) {
6946 struct ata_port
*ap
;
6948 ap
= ata_port_alloc(host
);
6953 host
->ports
[i
] = ap
;
6956 devres_remove_group(dev
, NULL
);
6960 devres_release_group(dev
, NULL
);
6965 * ata_host_alloc_pinfo - alloc host and init with port_info array
6966 * @dev: generic device this host is associated with
6967 * @ppi: array of ATA port_info to initialize host with
6968 * @n_ports: number of ATA ports attached to this host
6970 * Allocate ATA host and initialize with info from @ppi. If NULL
6971 * terminated, @ppi may contain fewer entries than @n_ports. The
6972 * last entry will be used for the remaining ports.
6975 * Allocate ATA host on success, NULL on failure.
6978 * Inherited from calling layer (may sleep).
6980 struct ata_host
*ata_host_alloc_pinfo(struct device
*dev
,
6981 const struct ata_port_info
* const * ppi
,
6984 const struct ata_port_info
*pi
;
6985 struct ata_host
*host
;
6988 host
= ata_host_alloc(dev
, n_ports
);
6992 for (i
= 0, j
= 0, pi
= NULL
; i
< host
->n_ports
; i
++) {
6993 struct ata_port
*ap
= host
->ports
[i
];
6998 ap
->pio_mask
= pi
->pio_mask
;
6999 ap
->mwdma_mask
= pi
->mwdma_mask
;
7000 ap
->udma_mask
= pi
->udma_mask
;
7001 ap
->flags
|= pi
->flags
;
7002 ap
->link
.flags
|= pi
->link_flags
;
7003 ap
->ops
= pi
->port_ops
;
7005 if (!host
->ops
&& (pi
->port_ops
!= &ata_dummy_port_ops
))
7006 host
->ops
= pi
->port_ops
;
7012 static void ata_host_stop(struct device
*gendev
, void *res
)
7014 struct ata_host
*host
= dev_get_drvdata(gendev
);
7017 WARN_ON(!(host
->flags
& ATA_HOST_STARTED
));
7019 for (i
= 0; i
< host
->n_ports
; i
++) {
7020 struct ata_port
*ap
= host
->ports
[i
];
7022 if (ap
->ops
->port_stop
)
7023 ap
->ops
->port_stop(ap
);
7026 if (host
->ops
->host_stop
)
7027 host
->ops
->host_stop(host
);
7031 * ata_finalize_port_ops - finalize ata_port_operations
7032 * @ops: ata_port_operations to finalize
7034 * An ata_port_operations can inherit from another ops and that
7035 * ops can again inherit from another. This can go on as many
7036 * times as necessary as long as there is no loop in the
7037 * inheritance chain.
7039 * Ops tables are finalized when the host is started. NULL or
7040 * unspecified entries are inherited from the closet ancestor
7041 * which has the method and the entry is populated with it.
7042 * After finalization, the ops table directly points to all the
7043 * methods and ->inherits is no longer necessary and cleared.
7045 * Using ATA_OP_NULL, inheriting ops can force a method to NULL.
7050 static void ata_finalize_port_ops(struct ata_port_operations
*ops
)
7052 static spinlock_t lock
= SPIN_LOCK_UNLOCKED
;
7053 const struct ata_port_operations
*cur
;
7054 void **begin
= (void **)ops
;
7055 void **end
= (void **)&ops
->inherits
;
7058 if (!ops
|| !ops
->inherits
)
7063 for (cur
= ops
->inherits
; cur
; cur
= cur
->inherits
) {
7064 void **inherit
= (void **)cur
;
7066 for (pp
= begin
; pp
< end
; pp
++, inherit
++)
7071 for (pp
= begin
; pp
< end
; pp
++)
7075 ops
->inherits
= NULL
;
7081 * ata_host_start - start and freeze ports of an ATA host
7082 * @host: ATA host to start ports for
7084 * Start and then freeze ports of @host. Started status is
7085 * recorded in host->flags, so this function can be called
7086 * multiple times. Ports are guaranteed to get started only
7087 * once. If host->ops isn't initialized yet, its set to the
7088 * first non-dummy port ops.
7091 * Inherited from calling layer (may sleep).
7094 * 0 if all ports are started successfully, -errno otherwise.
7096 int ata_host_start(struct ata_host
*host
)
7099 void *start_dr
= NULL
;
7102 if (host
->flags
& ATA_HOST_STARTED
)
7105 ata_finalize_port_ops(host
->ops
);
7107 for (i
= 0; i
< host
->n_ports
; i
++) {
7108 struct ata_port
*ap
= host
->ports
[i
];
7110 ata_finalize_port_ops(ap
->ops
);
7112 if (!host
->ops
&& !ata_port_is_dummy(ap
))
7113 host
->ops
= ap
->ops
;
7115 if (ap
->ops
->port_stop
)
7119 if (host
->ops
->host_stop
)
7123 start_dr
= devres_alloc(ata_host_stop
, 0, GFP_KERNEL
);
7128 for (i
= 0; i
< host
->n_ports
; i
++) {
7129 struct ata_port
*ap
= host
->ports
[i
];
7131 if (ap
->ops
->port_start
) {
7132 rc
= ap
->ops
->port_start(ap
);
7135 dev_printk(KERN_ERR
, host
->dev
,
7136 "failed to start port %d "
7137 "(errno=%d)\n", i
, rc
);
7141 ata_eh_freeze_port(ap
);
7145 devres_add(host
->dev
, start_dr
);
7146 host
->flags
|= ATA_HOST_STARTED
;
7151 struct ata_port
*ap
= host
->ports
[i
];
7153 if (ap
->ops
->port_stop
)
7154 ap
->ops
->port_stop(ap
);
7156 devres_free(start_dr
);
7161 * ata_sas_host_init - Initialize a host struct
7162 * @host: host to initialize
7163 * @dev: device host is attached to
7164 * @flags: host flags
7168 * PCI/etc. bus probe sem.
7171 /* KILLME - the only user left is ipr */
7172 void ata_host_init(struct ata_host
*host
, struct device
*dev
,
7173 unsigned long flags
, struct ata_port_operations
*ops
)
7175 spin_lock_init(&host
->lock
);
7177 host
->flags
= flags
;
7182 * ata_host_register - register initialized ATA host
7183 * @host: ATA host to register
7184 * @sht: template for SCSI host
7186 * Register initialized ATA host. @host is allocated using
7187 * ata_host_alloc() and fully initialized by LLD. This function
7188 * starts ports, registers @host with ATA and SCSI layers and
7189 * probe registered devices.
7192 * Inherited from calling layer (may sleep).
7195 * 0 on success, -errno otherwise.
7197 int ata_host_register(struct ata_host
*host
, struct scsi_host_template
*sht
)
7201 /* host must have been started */
7202 if (!(host
->flags
& ATA_HOST_STARTED
)) {
7203 dev_printk(KERN_ERR
, host
->dev
,
7204 "BUG: trying to register unstarted host\n");
7209 /* Blow away unused ports. This happens when LLD can't
7210 * determine the exact number of ports to allocate at
7213 for (i
= host
->n_ports
; host
->ports
[i
]; i
++)
7214 kfree(host
->ports
[i
]);
7216 /* give ports names and add SCSI hosts */
7217 for (i
= 0; i
< host
->n_ports
; i
++)
7218 host
->ports
[i
]->print_id
= ata_print_id
++;
7220 rc
= ata_scsi_add_hosts(host
, sht
);
7224 /* associate with ACPI nodes */
7225 ata_acpi_associate(host
);
7227 /* set cable, sata_spd_limit and report */
7228 for (i
= 0; i
< host
->n_ports
; i
++) {
7229 struct ata_port
*ap
= host
->ports
[i
];
7230 unsigned long xfer_mask
;
7232 /* set SATA cable type if still unset */
7233 if (ap
->cbl
== ATA_CBL_NONE
&& (ap
->flags
& ATA_FLAG_SATA
))
7234 ap
->cbl
= ATA_CBL_SATA
;
7236 /* init sata_spd_limit to the current value */
7237 sata_link_init_spd(&ap
->link
);
7239 /* print per-port info to dmesg */
7240 xfer_mask
= ata_pack_xfermask(ap
->pio_mask
, ap
->mwdma_mask
,
7243 if (!ata_port_is_dummy(ap
)) {
7244 ata_port_printk(ap
, KERN_INFO
,
7245 "%cATA max %s %s\n",
7246 (ap
->flags
& ATA_FLAG_SATA
) ? 'S' : 'P',
7247 ata_mode_string(xfer_mask
),
7248 ap
->link
.eh_info
.desc
);
7249 ata_ehi_clear_desc(&ap
->link
.eh_info
);
7251 ata_port_printk(ap
, KERN_INFO
, "DUMMY\n");
7254 /* perform each probe synchronously */
7255 DPRINTK("probe begin\n");
7256 for (i
= 0; i
< host
->n_ports
; i
++) {
7257 struct ata_port
*ap
= host
->ports
[i
];
7260 if (ap
->ops
->error_handler
) {
7261 struct ata_eh_info
*ehi
= &ap
->link
.eh_info
;
7262 unsigned long flags
;
7266 /* kick EH for boot probing */
7267 spin_lock_irqsave(ap
->lock
, flags
);
7269 ehi
->probe_mask
|= ATA_ALL_DEVICES
;
7270 ehi
->action
|= ATA_EH_RESET
;
7271 ehi
->flags
|= ATA_EHI_NO_AUTOPSY
| ATA_EHI_QUIET
;
7273 ap
->pflags
&= ~ATA_PFLAG_INITIALIZING
;
7274 ap
->pflags
|= ATA_PFLAG_LOADING
;
7275 ata_port_schedule_eh(ap
);
7277 spin_unlock_irqrestore(ap
->lock
, flags
);
7279 /* wait for EH to finish */
7280 ata_port_wait_eh(ap
);
7282 DPRINTK("ata%u: bus probe begin\n", ap
->print_id
);
7283 rc
= ata_bus_probe(ap
);
7284 DPRINTK("ata%u: bus probe end\n", ap
->print_id
);
7287 /* FIXME: do something useful here?
7288 * Current libata behavior will
7289 * tear down everything when
7290 * the module is removed
7291 * or the h/w is unplugged.
7297 /* probes are done, now scan each port's disk(s) */
7298 DPRINTK("host probe begin\n");
7299 for (i
= 0; i
< host
->n_ports
; i
++) {
7300 struct ata_port
*ap
= host
->ports
[i
];
7302 ata_scsi_scan_host(ap
, 1);
7303 ata_lpm_schedule(ap
, ap
->pm_policy
);
7310 * ata_host_activate - start host, request IRQ and register it
7311 * @host: target ATA host
7312 * @irq: IRQ to request
7313 * @irq_handler: irq_handler used when requesting IRQ
7314 * @irq_flags: irq_flags used when requesting IRQ
7315 * @sht: scsi_host_template to use when registering the host
7317 * After allocating an ATA host and initializing it, most libata
7318 * LLDs perform three steps to activate the host - start host,
7319 * request IRQ and register it. This helper takes necessasry
7320 * arguments and performs the three steps in one go.
7322 * An invalid IRQ skips the IRQ registration and expects the host to
7323 * have set polling mode on the port. In this case, @irq_handler
7327 * Inherited from calling layer (may sleep).
7330 * 0 on success, -errno otherwise.
7332 int ata_host_activate(struct ata_host
*host
, int irq
,
7333 irq_handler_t irq_handler
, unsigned long irq_flags
,
7334 struct scsi_host_template
*sht
)
7338 rc
= ata_host_start(host
);
7342 /* Special case for polling mode */
7344 WARN_ON(irq_handler
);
7345 return ata_host_register(host
, sht
);
7348 rc
= devm_request_irq(host
->dev
, irq
, irq_handler
, irq_flags
,
7349 dev_driver_string(host
->dev
), host
);
7353 for (i
= 0; i
< host
->n_ports
; i
++)
7354 ata_port_desc(host
->ports
[i
], "irq %d", irq
);
7356 rc
= ata_host_register(host
, sht
);
7357 /* if failed, just free the IRQ and leave ports alone */
7359 devm_free_irq(host
->dev
, irq
, host
);
7365 * ata_port_detach - Detach ATA port in prepration of device removal
7366 * @ap: ATA port to be detached
7368 * Detach all ATA devices and the associated SCSI devices of @ap;
7369 * then, remove the associated SCSI host. @ap is guaranteed to
7370 * be quiescent on return from this function.
7373 * Kernel thread context (may sleep).
7375 static void ata_port_detach(struct ata_port
*ap
)
7377 unsigned long flags
;
7378 struct ata_link
*link
;
7379 struct ata_device
*dev
;
7381 if (!ap
->ops
->error_handler
)
7384 /* tell EH we're leaving & flush EH */
7385 spin_lock_irqsave(ap
->lock
, flags
);
7386 ap
->pflags
|= ATA_PFLAG_UNLOADING
;
7387 spin_unlock_irqrestore(ap
->lock
, flags
);
7389 ata_port_wait_eh(ap
);
7391 /* EH is now guaranteed to see UNLOADING - EH context belongs
7392 * to us. Disable all existing devices.
7394 ata_port_for_each_link(link
, ap
) {
7395 ata_link_for_each_dev(dev
, link
)
7396 ata_dev_disable(dev
);
7399 /* Final freeze & EH. All in-flight commands are aborted. EH
7400 * will be skipped and retrials will be terminated with bad
7403 spin_lock_irqsave(ap
->lock
, flags
);
7404 ata_port_freeze(ap
); /* won't be thawed */
7405 spin_unlock_irqrestore(ap
->lock
, flags
);
7407 ata_port_wait_eh(ap
);
7408 cancel_rearming_delayed_work(&ap
->hotplug_task
);
7411 /* remove the associated SCSI host */
7412 scsi_remove_host(ap
->scsi_host
);
7416 * ata_host_detach - Detach all ports of an ATA host
7417 * @host: Host to detach
7419 * Detach all ports of @host.
7422 * Kernel thread context (may sleep).
7424 void ata_host_detach(struct ata_host
*host
)
7428 for (i
= 0; i
< host
->n_ports
; i
++)
7429 ata_port_detach(host
->ports
[i
]);
7431 /* the host is dead now, dissociate ACPI */
7432 ata_acpi_dissociate(host
);
7436 * ata_std_ports - initialize ioaddr with standard port offsets.
7437 * @ioaddr: IO address structure to be initialized
7439 * Utility function which initializes data_addr, error_addr,
7440 * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr,
7441 * device_addr, status_addr, and command_addr to standard offsets
7442 * relative to cmd_addr.
7444 * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr.
7447 void ata_std_ports(struct ata_ioports
*ioaddr
)
7449 ioaddr
->data_addr
= ioaddr
->cmd_addr
+ ATA_REG_DATA
;
7450 ioaddr
->error_addr
= ioaddr
->cmd_addr
+ ATA_REG_ERR
;
7451 ioaddr
->feature_addr
= ioaddr
->cmd_addr
+ ATA_REG_FEATURE
;
7452 ioaddr
->nsect_addr
= ioaddr
->cmd_addr
+ ATA_REG_NSECT
;
7453 ioaddr
->lbal_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAL
;
7454 ioaddr
->lbam_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAM
;
7455 ioaddr
->lbah_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAH
;
7456 ioaddr
->device_addr
= ioaddr
->cmd_addr
+ ATA_REG_DEVICE
;
7457 ioaddr
->status_addr
= ioaddr
->cmd_addr
+ ATA_REG_STATUS
;
7458 ioaddr
->command_addr
= ioaddr
->cmd_addr
+ ATA_REG_CMD
;
7465 * ata_pci_remove_one - PCI layer callback for device removal
7466 * @pdev: PCI device that was removed
7468 * PCI layer indicates to libata via this hook that hot-unplug or
7469 * module unload event has occurred. Detach all ports. Resource
7470 * release is handled via devres.
7473 * Inherited from PCI layer (may sleep).
7475 void ata_pci_remove_one(struct pci_dev
*pdev
)
7477 struct device
*dev
= &pdev
->dev
;
7478 struct ata_host
*host
= dev_get_drvdata(dev
);
7480 ata_host_detach(host
);
7483 /* move to PCI subsystem */
7484 int pci_test_config_bits(struct pci_dev
*pdev
, const struct pci_bits
*bits
)
7486 unsigned long tmp
= 0;
7488 switch (bits
->width
) {
7491 pci_read_config_byte(pdev
, bits
->reg
, &tmp8
);
7497 pci_read_config_word(pdev
, bits
->reg
, &tmp16
);
7503 pci_read_config_dword(pdev
, bits
->reg
, &tmp32
);
7514 return (tmp
== bits
->val
) ? 1 : 0;
7518 void ata_pci_device_do_suspend(struct pci_dev
*pdev
, pm_message_t mesg
)
7520 pci_save_state(pdev
);
7521 pci_disable_device(pdev
);
7523 if (mesg
.event
& PM_EVENT_SLEEP
)
7524 pci_set_power_state(pdev
, PCI_D3hot
);
7527 int ata_pci_device_do_resume(struct pci_dev
*pdev
)
7531 pci_set_power_state(pdev
, PCI_D0
);
7532 pci_restore_state(pdev
);
7534 rc
= pcim_enable_device(pdev
);
7536 dev_printk(KERN_ERR
, &pdev
->dev
,
7537 "failed to enable device after resume (%d)\n", rc
);
7541 pci_set_master(pdev
);
7545 int ata_pci_device_suspend(struct pci_dev
*pdev
, pm_message_t mesg
)
7547 struct ata_host
*host
= dev_get_drvdata(&pdev
->dev
);
7550 rc
= ata_host_suspend(host
, mesg
);
7554 ata_pci_device_do_suspend(pdev
, mesg
);
7559 int ata_pci_device_resume(struct pci_dev
*pdev
)
7561 struct ata_host
*host
= dev_get_drvdata(&pdev
->dev
);
7564 rc
= ata_pci_device_do_resume(pdev
);
7566 ata_host_resume(host
);
7569 #endif /* CONFIG_PM */
7571 #endif /* CONFIG_PCI */
7573 static int __init
ata_parse_force_one(char **cur
,
7574 struct ata_force_ent
*force_ent
,
7575 const char **reason
)
7577 /* FIXME: Currently, there's no way to tag init const data and
7578 * using __initdata causes build failure on some versions of
7579 * gcc. Once __initdataconst is implemented, add const to the
7580 * following structure.
7582 static struct ata_force_param force_tbl
[] __initdata
= {
7583 { "40c", .cbl
= ATA_CBL_PATA40
},
7584 { "80c", .cbl
= ATA_CBL_PATA80
},
7585 { "short40c", .cbl
= ATA_CBL_PATA40_SHORT
},
7586 { "unk", .cbl
= ATA_CBL_PATA_UNK
},
7587 { "ign", .cbl
= ATA_CBL_PATA_IGN
},
7588 { "sata", .cbl
= ATA_CBL_SATA
},
7589 { "1.5Gbps", .spd_limit
= 1 },
7590 { "3.0Gbps", .spd_limit
= 2 },
7591 { "noncq", .horkage_on
= ATA_HORKAGE_NONCQ
},
7592 { "ncq", .horkage_off
= ATA_HORKAGE_NONCQ
},
7593 { "pio0", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 0) },
7594 { "pio1", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 1) },
7595 { "pio2", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 2) },
7596 { "pio3", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 3) },
7597 { "pio4", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 4) },
7598 { "pio5", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 5) },
7599 { "pio6", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 6) },
7600 { "mwdma0", .xfer_mask
= 1 << (ATA_SHIFT_MWDMA
+ 0) },
7601 { "mwdma1", .xfer_mask
= 1 << (ATA_SHIFT_MWDMA
+ 1) },
7602 { "mwdma2", .xfer_mask
= 1 << (ATA_SHIFT_MWDMA
+ 2) },
7603 { "mwdma3", .xfer_mask
= 1 << (ATA_SHIFT_MWDMA
+ 3) },
7604 { "mwdma4", .xfer_mask
= 1 << (ATA_SHIFT_MWDMA
+ 4) },
7605 { "udma0", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 0) },
7606 { "udma16", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 0) },
7607 { "udma/16", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 0) },
7608 { "udma1", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 1) },
7609 { "udma25", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 1) },
7610 { "udma/25", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 1) },
7611 { "udma2", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 2) },
7612 { "udma33", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 2) },
7613 { "udma/33", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 2) },
7614 { "udma3", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 3) },
7615 { "udma44", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 3) },
7616 { "udma/44", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 3) },
7617 { "udma4", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 4) },
7618 { "udma66", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 4) },
7619 { "udma/66", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 4) },
7620 { "udma5", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 5) },
7621 { "udma100", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 5) },
7622 { "udma/100", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 5) },
7623 { "udma6", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 6) },
7624 { "udma133", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 6) },
7625 { "udma/133", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 6) },
7626 { "udma7", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 7) },
7628 char *start
= *cur
, *p
= *cur
;
7629 char *id
, *val
, *endp
;
7630 const struct ata_force_param
*match_fp
= NULL
;
7631 int nr_matches
= 0, i
;
7633 /* find where this param ends and update *cur */
7634 while (*p
!= '\0' && *p
!= ',')
7645 p
= strchr(start
, ':');
7647 val
= strstrip(start
);
7652 id
= strstrip(start
);
7653 val
= strstrip(p
+ 1);
7656 p
= strchr(id
, '.');
7659 force_ent
->device
= simple_strtoul(p
, &endp
, 10);
7660 if (p
== endp
|| *endp
!= '\0') {
7661 *reason
= "invalid device";
7666 force_ent
->port
= simple_strtoul(id
, &endp
, 10);
7667 if (p
== endp
|| *endp
!= '\0') {
7668 *reason
= "invalid port/link";
7673 /* parse val, allow shortcuts so that both 1.5 and 1.5Gbps work */
7674 for (i
= 0; i
< ARRAY_SIZE(force_tbl
); i
++) {
7675 const struct ata_force_param
*fp
= &force_tbl
[i
];
7677 if (strncasecmp(val
, fp
->name
, strlen(val
)))
7683 if (strcasecmp(val
, fp
->name
) == 0) {
7690 *reason
= "unknown value";
7693 if (nr_matches
> 1) {
7694 *reason
= "ambigious value";
7698 force_ent
->param
= *match_fp
;
7703 static void __init
ata_parse_force_param(void)
7705 int idx
= 0, size
= 1;
7706 int last_port
= -1, last_device
= -1;
7707 char *p
, *cur
, *next
;
7709 /* calculate maximum number of params and allocate force_tbl */
7710 for (p
= ata_force_param_buf
; *p
; p
++)
7714 ata_force_tbl
= kzalloc(sizeof(ata_force_tbl
[0]) * size
, GFP_KERNEL
);
7715 if (!ata_force_tbl
) {
7716 printk(KERN_WARNING
"ata: failed to extend force table, "
7717 "libata.force ignored\n");
7721 /* parse and populate the table */
7722 for (cur
= ata_force_param_buf
; *cur
!= '\0'; cur
= next
) {
7723 const char *reason
= "";
7724 struct ata_force_ent te
= { .port
= -1, .device
= -1 };
7727 if (ata_parse_force_one(&next
, &te
, &reason
)) {
7728 printk(KERN_WARNING
"ata: failed to parse force "
7729 "parameter \"%s\" (%s)\n",
7734 if (te
.port
== -1) {
7735 te
.port
= last_port
;
7736 te
.device
= last_device
;
7739 ata_force_tbl
[idx
++] = te
;
7741 last_port
= te
.port
;
7742 last_device
= te
.device
;
7745 ata_force_tbl_size
= idx
;
7748 static int __init
ata_init(void)
7750 ata_probe_timeout
*= HZ
;
7752 ata_parse_force_param();
7754 ata_wq
= create_workqueue("ata");
7758 ata_aux_wq
= create_singlethread_workqueue("ata_aux");
7760 destroy_workqueue(ata_wq
);
7764 printk(KERN_DEBUG
"libata version " DRV_VERSION
" loaded.\n");
7768 static void __exit
ata_exit(void)
7770 kfree(ata_force_tbl
);
7771 destroy_workqueue(ata_wq
);
7772 destroy_workqueue(ata_aux_wq
);
7775 subsys_initcall(ata_init
);
7776 module_exit(ata_exit
);
7778 static unsigned long ratelimit_time
;
7779 static DEFINE_SPINLOCK(ata_ratelimit_lock
);
7781 int ata_ratelimit(void)
7784 unsigned long flags
;
7786 spin_lock_irqsave(&ata_ratelimit_lock
, flags
);
7788 if (time_after(jiffies
, ratelimit_time
)) {
7790 ratelimit_time
= jiffies
+ (HZ
/5);
7794 spin_unlock_irqrestore(&ata_ratelimit_lock
, flags
);
7800 * ata_wait_register - wait until register value changes
7801 * @reg: IO-mapped register
7802 * @mask: Mask to apply to read register value
7803 * @val: Wait condition
7804 * @interval_msec: polling interval in milliseconds
7805 * @timeout_msec: timeout in milliseconds
7807 * Waiting for some bits of register to change is a common
7808 * operation for ATA controllers. This function reads 32bit LE
7809 * IO-mapped register @reg and tests for the following condition.
7811 * (*@reg & mask) != val
7813 * If the condition is met, it returns; otherwise, the process is
7814 * repeated after @interval_msec until timeout.
7817 * Kernel thread context (may sleep)
7820 * The final register value.
7822 u32
ata_wait_register(void __iomem
*reg
, u32 mask
, u32 val
,
7823 unsigned long interval_msec
,
7824 unsigned long timeout_msec
)
7826 unsigned long timeout
;
7829 tmp
= ioread32(reg
);
7831 /* Calculate timeout _after_ the first read to make sure
7832 * preceding writes reach the controller before starting to
7833 * eat away the timeout.
7835 timeout
= jiffies
+ (timeout_msec
* HZ
) / 1000;
7837 while ((tmp
& mask
) == val
&& time_before(jiffies
, timeout
)) {
7838 msleep(interval_msec
);
7839 tmp
= ioread32(reg
);
7848 static void ata_dummy_noret(struct ata_port
*ap
) { }
7849 static int ata_dummy_ret0(struct ata_port
*ap
) { return 0; }
7850 static void ata_dummy_qc_noret(struct ata_queued_cmd
*qc
) { }
7852 static u8
ata_dummy_check_status(struct ata_port
*ap
)
7857 static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd
*qc
)
7859 return AC_ERR_SYSTEM
;
7862 struct ata_port_operations ata_dummy_port_ops
= {
7863 .check_status
= ata_dummy_check_status
,
7864 .check_altstatus
= ata_dummy_check_status
,
7865 .dev_select
= ata_noop_dev_select
,
7866 .qc_prep
= ata_noop_qc_prep
,
7867 .qc_issue
= ata_dummy_qc_issue
,
7868 .freeze
= ata_dummy_noret
,
7869 .thaw
= ata_dummy_noret
,
7870 .error_handler
= ata_dummy_noret
,
7871 .post_internal_cmd
= ata_dummy_qc_noret
,
7872 .irq_clear
= ata_dummy_noret
,
7873 .port_start
= ata_dummy_ret0
,
7874 .port_stop
= ata_dummy_noret
,
7877 const struct ata_port_info ata_dummy_port_info
= {
7878 .port_ops
= &ata_dummy_port_ops
,
7882 * libata is essentially a library of internal helper functions for
7883 * low-level ATA host controller drivers. As such, the API/ABI is
7884 * likely to change as new drivers are added and updated.
7885 * Do not depend on ABI/API stability.
7887 EXPORT_SYMBOL_GPL(sata_deb_timing_normal
);
7888 EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug
);
7889 EXPORT_SYMBOL_GPL(sata_deb_timing_long
);
7890 EXPORT_SYMBOL_GPL(ata_base_port_ops
);
7891 EXPORT_SYMBOL_GPL(sata_port_ops
);
7892 EXPORT_SYMBOL_GPL(sata_pmp_port_ops
);
7893 EXPORT_SYMBOL_GPL(ata_sff_port_ops
);
7894 EXPORT_SYMBOL_GPL(ata_bmdma_port_ops
);
7895 EXPORT_SYMBOL_GPL(ata_dummy_port_ops
);
7896 EXPORT_SYMBOL_GPL(ata_dummy_port_info
);
7897 EXPORT_SYMBOL_GPL(ata_std_bios_param
);
7898 EXPORT_SYMBOL_GPL(ata_std_ports
);
7899 EXPORT_SYMBOL_GPL(ata_host_init
);
7900 EXPORT_SYMBOL_GPL(ata_host_alloc
);
7901 EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo
);
7902 EXPORT_SYMBOL_GPL(ata_host_start
);
7903 EXPORT_SYMBOL_GPL(ata_host_register
);
7904 EXPORT_SYMBOL_GPL(ata_host_activate
);
7905 EXPORT_SYMBOL_GPL(ata_host_detach
);
7906 EXPORT_SYMBOL_GPL(ata_sg_init
);
7907 EXPORT_SYMBOL_GPL(ata_hsm_move
);
7908 EXPORT_SYMBOL_GPL(ata_qc_complete
);
7909 EXPORT_SYMBOL_GPL(ata_qc_complete_multiple
);
7910 EXPORT_SYMBOL_GPL(ata_qc_issue_prot
);
7911 EXPORT_SYMBOL_GPL(ata_tf_load
);
7912 EXPORT_SYMBOL_GPL(ata_tf_read
);
7913 EXPORT_SYMBOL_GPL(ata_noop_dev_select
);
7914 EXPORT_SYMBOL_GPL(ata_std_dev_select
);
7915 EXPORT_SYMBOL_GPL(sata_print_link_status
);
7916 EXPORT_SYMBOL_GPL(atapi_cmd_type
);
7917 EXPORT_SYMBOL_GPL(ata_tf_to_fis
);
7918 EXPORT_SYMBOL_GPL(ata_tf_from_fis
);
7919 EXPORT_SYMBOL_GPL(ata_pack_xfermask
);
7920 EXPORT_SYMBOL_GPL(ata_unpack_xfermask
);
7921 EXPORT_SYMBOL_GPL(ata_xfer_mask2mode
);
7922 EXPORT_SYMBOL_GPL(ata_xfer_mode2mask
);
7923 EXPORT_SYMBOL_GPL(ata_xfer_mode2shift
);
7924 EXPORT_SYMBOL_GPL(ata_mode_string
);
7925 EXPORT_SYMBOL_GPL(ata_id_xfermask
);
7926 EXPORT_SYMBOL_GPL(ata_check_status
);
7927 EXPORT_SYMBOL_GPL(ata_altstatus
);
7928 EXPORT_SYMBOL_GPL(ata_exec_command
);
7929 EXPORT_SYMBOL_GPL(ata_port_start
);
7930 EXPORT_SYMBOL_GPL(ata_sff_port_start
);
7931 EXPORT_SYMBOL_GPL(ata_interrupt
);
7932 EXPORT_SYMBOL_GPL(ata_do_set_mode
);
7933 EXPORT_SYMBOL_GPL(ata_data_xfer
);
7934 EXPORT_SYMBOL_GPL(ata_data_xfer_noirq
);
7935 EXPORT_SYMBOL_GPL(ata_std_qc_defer
);
7936 EXPORT_SYMBOL_GPL(ata_qc_prep
);
7937 EXPORT_SYMBOL_GPL(ata_dumb_qc_prep
);
7938 EXPORT_SYMBOL_GPL(ata_noop_qc_prep
);
7939 EXPORT_SYMBOL_GPL(ata_bmdma_setup
);
7940 EXPORT_SYMBOL_GPL(ata_bmdma_start
);
7941 EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear
);
7942 EXPORT_SYMBOL_GPL(ata_noop_irq_clear
);
7943 EXPORT_SYMBOL_GPL(ata_bmdma_status
);
7944 EXPORT_SYMBOL_GPL(ata_bmdma_stop
);
7945 EXPORT_SYMBOL_GPL(ata_bmdma_freeze
);
7946 EXPORT_SYMBOL_GPL(ata_bmdma_thaw
);
7947 EXPORT_SYMBOL_GPL(ata_bmdma_error_handler
);
7948 EXPORT_SYMBOL_GPL(ata_bmdma_post_internal_cmd
);
7949 EXPORT_SYMBOL_GPL(ata_port_probe
);
7950 EXPORT_SYMBOL_GPL(ata_dev_disable
);
7951 EXPORT_SYMBOL_GPL(sata_set_spd
);
7952 EXPORT_SYMBOL_GPL(sata_link_debounce
);
7953 EXPORT_SYMBOL_GPL(sata_link_resume
);
7954 EXPORT_SYMBOL_GPL(ata_bus_reset
);
7955 EXPORT_SYMBOL_GPL(ata_std_prereset
);
7956 EXPORT_SYMBOL_GPL(ata_std_softreset
);
7957 EXPORT_SYMBOL_GPL(sata_link_hardreset
);
7958 EXPORT_SYMBOL_GPL(sata_std_hardreset
);
7959 EXPORT_SYMBOL_GPL(ata_std_postreset
);
7960 EXPORT_SYMBOL_GPL(ata_dev_classify
);
7961 EXPORT_SYMBOL_GPL(ata_dev_pair
);
7962 EXPORT_SYMBOL_GPL(ata_port_disable
);
7963 EXPORT_SYMBOL_GPL(ata_ratelimit
);
7964 EXPORT_SYMBOL_GPL(ata_wait_register
);
7965 EXPORT_SYMBOL_GPL(ata_busy_sleep
);
7966 EXPORT_SYMBOL_GPL(ata_wait_after_reset
);
7967 EXPORT_SYMBOL_GPL(ata_wait_ready
);
7968 EXPORT_SYMBOL_GPL(ata_scsi_ioctl
);
7969 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd
);
7970 EXPORT_SYMBOL_GPL(ata_scsi_slave_config
);
7971 EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy
);
7972 EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth
);
7973 EXPORT_SYMBOL_GPL(ata_host_intr
);
7974 EXPORT_SYMBOL_GPL(sata_scr_valid
);
7975 EXPORT_SYMBOL_GPL(sata_scr_read
);
7976 EXPORT_SYMBOL_GPL(sata_scr_write
);
7977 EXPORT_SYMBOL_GPL(sata_scr_write_flush
);
7978 EXPORT_SYMBOL_GPL(ata_link_online
);
7979 EXPORT_SYMBOL_GPL(ata_link_offline
);
7981 EXPORT_SYMBOL_GPL(ata_host_suspend
);
7982 EXPORT_SYMBOL_GPL(ata_host_resume
);
7983 #endif /* CONFIG_PM */
7984 EXPORT_SYMBOL_GPL(ata_id_string
);
7985 EXPORT_SYMBOL_GPL(ata_id_c_string
);
7986 EXPORT_SYMBOL_GPL(ata_scsi_simulate
);
7988 EXPORT_SYMBOL_GPL(ata_pio_need_iordy
);
7989 EXPORT_SYMBOL_GPL(ata_timing_find_mode
);
7990 EXPORT_SYMBOL_GPL(ata_timing_compute
);
7991 EXPORT_SYMBOL_GPL(ata_timing_merge
);
7992 EXPORT_SYMBOL_GPL(ata_timing_cycle2mode
);
7995 EXPORT_SYMBOL_GPL(pci_test_config_bits
);
7996 EXPORT_SYMBOL_GPL(ata_pci_init_sff_host
);
7997 EXPORT_SYMBOL_GPL(ata_pci_init_bmdma
);
7998 EXPORT_SYMBOL_GPL(ata_pci_prepare_sff_host
);
7999 EXPORT_SYMBOL_GPL(ata_pci_activate_sff_host
);
8000 EXPORT_SYMBOL_GPL(ata_pci_init_one
);
8001 EXPORT_SYMBOL_GPL(ata_pci_remove_one
);
8003 EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend
);
8004 EXPORT_SYMBOL_GPL(ata_pci_device_do_resume
);
8005 EXPORT_SYMBOL_GPL(ata_pci_device_suspend
);
8006 EXPORT_SYMBOL_GPL(ata_pci_device_resume
);
8007 #endif /* CONFIG_PM */
8008 EXPORT_SYMBOL_GPL(ata_pci_default_filter
);
8009 EXPORT_SYMBOL_GPL(ata_pci_clear_simplex
);
8010 #endif /* CONFIG_PCI */
8012 EXPORT_SYMBOL_GPL(sata_pmp_qc_defer_cmd_switch
);
8013 EXPORT_SYMBOL_GPL(sata_pmp_std_prereset
);
8014 EXPORT_SYMBOL_GPL(sata_pmp_std_hardreset
);
8015 EXPORT_SYMBOL_GPL(sata_pmp_std_postreset
);
8016 EXPORT_SYMBOL_GPL(sata_pmp_error_handler
);
8018 EXPORT_SYMBOL_GPL(__ata_ehi_push_desc
);
8019 EXPORT_SYMBOL_GPL(ata_ehi_push_desc
);
8020 EXPORT_SYMBOL_GPL(ata_ehi_clear_desc
);
8021 EXPORT_SYMBOL_GPL(ata_port_desc
);
8023 EXPORT_SYMBOL_GPL(ata_port_pbar_desc
);
8024 #endif /* CONFIG_PCI */
8025 EXPORT_SYMBOL_GPL(ata_port_schedule_eh
);
8026 EXPORT_SYMBOL_GPL(ata_link_abort
);
8027 EXPORT_SYMBOL_GPL(ata_port_abort
);
8028 EXPORT_SYMBOL_GPL(ata_port_freeze
);
8029 EXPORT_SYMBOL_GPL(sata_async_notification
);
8030 EXPORT_SYMBOL_GPL(ata_eh_freeze_port
);
8031 EXPORT_SYMBOL_GPL(ata_eh_thaw_port
);
8032 EXPORT_SYMBOL_GPL(ata_eh_qc_complete
);
8033 EXPORT_SYMBOL_GPL(ata_eh_qc_retry
);
8034 EXPORT_SYMBOL_GPL(ata_do_eh
);
8035 EXPORT_SYMBOL_GPL(ata_std_error_handler
);
8036 EXPORT_SYMBOL_GPL(ata_irq_on
);
8037 EXPORT_SYMBOL_GPL(ata_dev_try_classify
);
8039 EXPORT_SYMBOL_GPL(ata_cable_40wire
);
8040 EXPORT_SYMBOL_GPL(ata_cable_80wire
);
8041 EXPORT_SYMBOL_GPL(ata_cable_unknown
);
8042 EXPORT_SYMBOL_GPL(ata_cable_ignore
);
8043 EXPORT_SYMBOL_GPL(ata_cable_sata
);