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/
35 #include <linux/kernel.h>
36 #include <linux/module.h>
37 #include <linux/pci.h>
38 #include <linux/init.h>
39 #include <linux/list.h>
41 #include <linux/highmem.h>
42 #include <linux/spinlock.h>
43 #include <linux/blkdev.h>
44 #include <linux/delay.h>
45 #include <linux/timer.h>
46 #include <linux/interrupt.h>
47 #include <linux/completion.h>
48 #include <linux/suspend.h>
49 #include <linux/workqueue.h>
50 #include <linux/jiffies.h>
51 #include <linux/scatterlist.h>
52 #include <scsi/scsi.h>
53 #include <scsi/scsi_cmnd.h>
54 #include <scsi/scsi_host.h>
55 #include <linux/libata.h>
57 #include <asm/semaphore.h>
58 #include <asm/byteorder.h>
62 /* debounce timing parameters in msecs { interval, duration, timeout } */
63 const unsigned long sata_deb_timing_normal
[] = { 5, 100, 2000 };
64 const unsigned long sata_deb_timing_hotplug
[] = { 25, 500, 2000 };
65 const unsigned long sata_deb_timing_long
[] = { 100, 2000, 5000 };
67 static unsigned int ata_dev_init_params(struct ata_device
*dev
,
68 u16 heads
, u16 sectors
);
69 static unsigned int ata_dev_set_xfermode(struct ata_device
*dev
);
70 static void ata_dev_xfermask(struct ata_device
*dev
);
72 static unsigned int ata_unique_id
= 1;
73 static struct workqueue_struct
*ata_wq
;
75 struct workqueue_struct
*ata_aux_wq
;
77 int atapi_enabled
= 1;
78 module_param(atapi_enabled
, int, 0444);
79 MODULE_PARM_DESC(atapi_enabled
, "Enable discovery of ATAPI devices (0=off, 1=on)");
82 module_param(atapi_dmadir
, int, 0444);
83 MODULE_PARM_DESC(atapi_dmadir
, "Enable ATAPI DMADIR bridge support (0=off, 1=on)");
86 module_param_named(fua
, libata_fua
, int, 0444);
87 MODULE_PARM_DESC(fua
, "FUA support (0=off, 1=on)");
89 static int ata_probe_timeout
= ATA_TMOUT_INTERNAL
/ HZ
;
90 module_param(ata_probe_timeout
, int, 0444);
91 MODULE_PARM_DESC(ata_probe_timeout
, "Set ATA probing timeout (seconds)");
93 MODULE_AUTHOR("Jeff Garzik");
94 MODULE_DESCRIPTION("Library module for ATA devices");
95 MODULE_LICENSE("GPL");
96 MODULE_VERSION(DRV_VERSION
);
100 * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure
101 * @tf: Taskfile to convert
102 * @fis: Buffer into which data will output
103 * @pmp: Port multiplier port
105 * Converts a standard ATA taskfile to a Serial ATA
106 * FIS structure (Register - Host to Device).
109 * Inherited from caller.
112 void ata_tf_to_fis(const struct ata_taskfile
*tf
, u8
*fis
, u8 pmp
)
114 fis
[0] = 0x27; /* Register - Host to Device FIS */
115 fis
[1] = (pmp
& 0xf) | (1 << 7); /* Port multiplier number,
116 bit 7 indicates Command FIS */
117 fis
[2] = tf
->command
;
118 fis
[3] = tf
->feature
;
125 fis
[8] = tf
->hob_lbal
;
126 fis
[9] = tf
->hob_lbam
;
127 fis
[10] = tf
->hob_lbah
;
128 fis
[11] = tf
->hob_feature
;
131 fis
[13] = tf
->hob_nsect
;
142 * ata_tf_from_fis - Convert SATA FIS to ATA taskfile
143 * @fis: Buffer from which data will be input
144 * @tf: Taskfile to output
146 * Converts a serial ATA FIS structure to a standard ATA taskfile.
149 * Inherited from caller.
152 void ata_tf_from_fis(const u8
*fis
, struct ata_taskfile
*tf
)
154 tf
->command
= fis
[2]; /* status */
155 tf
->feature
= fis
[3]; /* error */
162 tf
->hob_lbal
= fis
[8];
163 tf
->hob_lbam
= fis
[9];
164 tf
->hob_lbah
= fis
[10];
167 tf
->hob_nsect
= fis
[13];
170 static const u8 ata_rw_cmds
[] = {
174 ATA_CMD_READ_MULTI_EXT
,
175 ATA_CMD_WRITE_MULTI_EXT
,
179 ATA_CMD_WRITE_MULTI_FUA_EXT
,
183 ATA_CMD_PIO_READ_EXT
,
184 ATA_CMD_PIO_WRITE_EXT
,
197 ATA_CMD_WRITE_FUA_EXT
201 * ata_rwcmd_protocol - set taskfile r/w commands and protocol
202 * @qc: command to examine and configure
204 * Examine the device configuration and tf->flags to calculate
205 * the proper read/write commands and protocol to use.
210 int ata_rwcmd_protocol(struct ata_queued_cmd
*qc
)
212 struct ata_taskfile
*tf
= &qc
->tf
;
213 struct ata_device
*dev
= qc
->dev
;
216 int index
, fua
, lba48
, write
;
218 fua
= (tf
->flags
& ATA_TFLAG_FUA
) ? 4 : 0;
219 lba48
= (tf
->flags
& ATA_TFLAG_LBA48
) ? 2 : 0;
220 write
= (tf
->flags
& ATA_TFLAG_WRITE
) ? 1 : 0;
222 if (dev
->flags
& ATA_DFLAG_PIO
) {
223 tf
->protocol
= ATA_PROT_PIO
;
224 index
= dev
->multi_count
? 0 : 8;
225 } else if (lba48
&& (qc
->ap
->flags
& ATA_FLAG_PIO_LBA48
)) {
226 /* Unable to use DMA due to host limitation */
227 tf
->protocol
= ATA_PROT_PIO
;
228 index
= dev
->multi_count
? 0 : 8;
230 tf
->protocol
= ATA_PROT_DMA
;
234 cmd
= ata_rw_cmds
[index
+ fua
+ lba48
+ write
];
243 * ata_tf_read_block - Read block address from ATA taskfile
244 * @tf: ATA taskfile of interest
245 * @dev: ATA device @tf belongs to
250 * Read block address from @tf. This function can handle all
251 * three address formats - LBA, LBA48 and CHS. tf->protocol and
252 * flags select the address format to use.
255 * Block address read from @tf.
257 u64
ata_tf_read_block(struct ata_taskfile
*tf
, struct ata_device
*dev
)
261 if (tf
->flags
& ATA_TFLAG_LBA
) {
262 if (tf
->flags
& ATA_TFLAG_LBA48
) {
263 block
|= (u64
)tf
->hob_lbah
<< 40;
264 block
|= (u64
)tf
->hob_lbam
<< 32;
265 block
|= tf
->hob_lbal
<< 24;
267 block
|= (tf
->device
& 0xf) << 24;
269 block
|= tf
->lbah
<< 16;
270 block
|= tf
->lbam
<< 8;
275 cyl
= tf
->lbam
| (tf
->lbah
<< 8);
276 head
= tf
->device
& 0xf;
279 block
= (cyl
* dev
->heads
+ head
) * dev
->sectors
+ sect
;
286 * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask
287 * @pio_mask: pio_mask
288 * @mwdma_mask: mwdma_mask
289 * @udma_mask: udma_mask
291 * Pack @pio_mask, @mwdma_mask and @udma_mask into a single
292 * unsigned int xfer_mask.
300 static unsigned int ata_pack_xfermask(unsigned int pio_mask
,
301 unsigned int mwdma_mask
,
302 unsigned int udma_mask
)
304 return ((pio_mask
<< ATA_SHIFT_PIO
) & ATA_MASK_PIO
) |
305 ((mwdma_mask
<< ATA_SHIFT_MWDMA
) & ATA_MASK_MWDMA
) |
306 ((udma_mask
<< ATA_SHIFT_UDMA
) & ATA_MASK_UDMA
);
310 * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks
311 * @xfer_mask: xfer_mask to unpack
312 * @pio_mask: resulting pio_mask
313 * @mwdma_mask: resulting mwdma_mask
314 * @udma_mask: resulting udma_mask
316 * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask.
317 * Any NULL distination masks will be ignored.
319 static void ata_unpack_xfermask(unsigned int xfer_mask
,
320 unsigned int *pio_mask
,
321 unsigned int *mwdma_mask
,
322 unsigned int *udma_mask
)
325 *pio_mask
= (xfer_mask
& ATA_MASK_PIO
) >> ATA_SHIFT_PIO
;
327 *mwdma_mask
= (xfer_mask
& ATA_MASK_MWDMA
) >> ATA_SHIFT_MWDMA
;
329 *udma_mask
= (xfer_mask
& ATA_MASK_UDMA
) >> ATA_SHIFT_UDMA
;
332 static const struct ata_xfer_ent
{
336 { ATA_SHIFT_PIO
, ATA_BITS_PIO
, XFER_PIO_0
},
337 { ATA_SHIFT_MWDMA
, ATA_BITS_MWDMA
, XFER_MW_DMA_0
},
338 { ATA_SHIFT_UDMA
, ATA_BITS_UDMA
, XFER_UDMA_0
},
343 * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask
344 * @xfer_mask: xfer_mask of interest
346 * Return matching XFER_* value for @xfer_mask. Only the highest
347 * bit of @xfer_mask is considered.
353 * Matching XFER_* value, 0 if no match found.
355 static u8
ata_xfer_mask2mode(unsigned int xfer_mask
)
357 int highbit
= fls(xfer_mask
) - 1;
358 const struct ata_xfer_ent
*ent
;
360 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
361 if (highbit
>= ent
->shift
&& highbit
< ent
->shift
+ ent
->bits
)
362 return ent
->base
+ highbit
- ent
->shift
;
367 * ata_xfer_mode2mask - Find matching xfer_mask for XFER_*
368 * @xfer_mode: XFER_* of interest
370 * Return matching xfer_mask for @xfer_mode.
376 * Matching xfer_mask, 0 if no match found.
378 static unsigned int ata_xfer_mode2mask(u8 xfer_mode
)
380 const struct ata_xfer_ent
*ent
;
382 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
383 if (xfer_mode
>= ent
->base
&& xfer_mode
< ent
->base
+ ent
->bits
)
384 return 1 << (ent
->shift
+ xfer_mode
- ent
->base
);
389 * ata_xfer_mode2shift - Find matching xfer_shift for XFER_*
390 * @xfer_mode: XFER_* of interest
392 * Return matching xfer_shift for @xfer_mode.
398 * Matching xfer_shift, -1 if no match found.
400 static int ata_xfer_mode2shift(unsigned int xfer_mode
)
402 const struct ata_xfer_ent
*ent
;
404 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
405 if (xfer_mode
>= ent
->base
&& xfer_mode
< ent
->base
+ ent
->bits
)
411 * ata_mode_string - convert xfer_mask to string
412 * @xfer_mask: mask of bits supported; only highest bit counts.
414 * Determine string which represents the highest speed
415 * (highest bit in @modemask).
421 * Constant C string representing highest speed listed in
422 * @mode_mask, or the constant C string "<n/a>".
424 static const char *ata_mode_string(unsigned int xfer_mask
)
426 static const char * const xfer_mode_str
[] = {
450 highbit
= fls(xfer_mask
) - 1;
451 if (highbit
>= 0 && highbit
< ARRAY_SIZE(xfer_mode_str
))
452 return xfer_mode_str
[highbit
];
456 static const char *sata_spd_string(unsigned int spd
)
458 static const char * const spd_str
[] = {
463 if (spd
== 0 || (spd
- 1) >= ARRAY_SIZE(spd_str
))
465 return spd_str
[spd
- 1];
468 void ata_dev_disable(struct ata_device
*dev
)
470 if (ata_dev_enabled(dev
) && ata_msg_drv(dev
->ap
)) {
471 ata_dev_printk(dev
, KERN_WARNING
, "disabled\n");
477 * ata_pio_devchk - PATA device presence detection
478 * @ap: ATA channel to examine
479 * @device: Device to examine (starting at zero)
481 * This technique was originally described in
482 * Hale Landis's ATADRVR (www.ata-atapi.com), and
483 * later found its way into the ATA/ATAPI spec.
485 * Write a pattern to the ATA shadow registers,
486 * and if a device is present, it will respond by
487 * correctly storing and echoing back the
488 * ATA shadow register contents.
494 static unsigned int ata_pio_devchk(struct ata_port
*ap
,
497 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
500 ap
->ops
->dev_select(ap
, device
);
502 outb(0x55, ioaddr
->nsect_addr
);
503 outb(0xaa, ioaddr
->lbal_addr
);
505 outb(0xaa, ioaddr
->nsect_addr
);
506 outb(0x55, ioaddr
->lbal_addr
);
508 outb(0x55, ioaddr
->nsect_addr
);
509 outb(0xaa, ioaddr
->lbal_addr
);
511 nsect
= inb(ioaddr
->nsect_addr
);
512 lbal
= inb(ioaddr
->lbal_addr
);
514 if ((nsect
== 0x55) && (lbal
== 0xaa))
515 return 1; /* we found a device */
517 return 0; /* nothing found */
521 * ata_mmio_devchk - PATA device presence detection
522 * @ap: ATA channel to examine
523 * @device: Device to examine (starting at zero)
525 * This technique was originally described in
526 * Hale Landis's ATADRVR (www.ata-atapi.com), and
527 * later found its way into the ATA/ATAPI spec.
529 * Write a pattern to the ATA shadow registers,
530 * and if a device is present, it will respond by
531 * correctly storing and echoing back the
532 * ATA shadow register contents.
538 static unsigned int ata_mmio_devchk(struct ata_port
*ap
,
541 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
544 ap
->ops
->dev_select(ap
, device
);
546 writeb(0x55, (void __iomem
*) ioaddr
->nsect_addr
);
547 writeb(0xaa, (void __iomem
*) ioaddr
->lbal_addr
);
549 writeb(0xaa, (void __iomem
*) ioaddr
->nsect_addr
);
550 writeb(0x55, (void __iomem
*) ioaddr
->lbal_addr
);
552 writeb(0x55, (void __iomem
*) ioaddr
->nsect_addr
);
553 writeb(0xaa, (void __iomem
*) ioaddr
->lbal_addr
);
555 nsect
= readb((void __iomem
*) ioaddr
->nsect_addr
);
556 lbal
= readb((void __iomem
*) ioaddr
->lbal_addr
);
558 if ((nsect
== 0x55) && (lbal
== 0xaa))
559 return 1; /* we found a device */
561 return 0; /* nothing found */
565 * ata_devchk - PATA device presence detection
566 * @ap: ATA channel to examine
567 * @device: Device to examine (starting at zero)
569 * Dispatch ATA device presence detection, depending
570 * on whether we are using PIO or MMIO to talk to the
571 * ATA shadow registers.
577 static unsigned int ata_devchk(struct ata_port
*ap
,
580 if (ap
->flags
& ATA_FLAG_MMIO
)
581 return ata_mmio_devchk(ap
, device
);
582 return ata_pio_devchk(ap
, device
);
586 * ata_dev_classify - determine device type based on ATA-spec signature
587 * @tf: ATA taskfile register set for device to be identified
589 * Determine from taskfile register contents whether a device is
590 * ATA or ATAPI, as per "Signature and persistence" section
591 * of ATA/PI spec (volume 1, sect 5.14).
597 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, or %ATA_DEV_UNKNOWN
598 * the event of failure.
601 unsigned int ata_dev_classify(const struct ata_taskfile
*tf
)
603 /* Apple's open source Darwin code hints that some devices only
604 * put a proper signature into the LBA mid/high registers,
605 * So, we only check those. It's sufficient for uniqueness.
608 if (((tf
->lbam
== 0) && (tf
->lbah
== 0)) ||
609 ((tf
->lbam
== 0x3c) && (tf
->lbah
== 0xc3))) {
610 DPRINTK("found ATA device by sig\n");
614 if (((tf
->lbam
== 0x14) && (tf
->lbah
== 0xeb)) ||
615 ((tf
->lbam
== 0x69) && (tf
->lbah
== 0x96))) {
616 DPRINTK("found ATAPI device by sig\n");
617 return ATA_DEV_ATAPI
;
620 DPRINTK("unknown device\n");
621 return ATA_DEV_UNKNOWN
;
625 * ata_dev_try_classify - Parse returned ATA device signature
626 * @ap: ATA channel to examine
627 * @device: Device to examine (starting at zero)
628 * @r_err: Value of error register on completion
630 * After an event -- SRST, E.D.D., or SATA COMRESET -- occurs,
631 * an ATA/ATAPI-defined set of values is placed in the ATA
632 * shadow registers, indicating the results of device detection
635 * Select the ATA device, and read the values from the ATA shadow
636 * registers. Then parse according to the Error register value,
637 * and the spec-defined values examined by ata_dev_classify().
643 * Device type - %ATA_DEV_ATA, %ATA_DEV_ATAPI or %ATA_DEV_NONE.
647 ata_dev_try_classify(struct ata_port
*ap
, unsigned int device
, u8
*r_err
)
649 struct ata_taskfile tf
;
653 ap
->ops
->dev_select(ap
, device
);
655 memset(&tf
, 0, sizeof(tf
));
657 ap
->ops
->tf_read(ap
, &tf
);
662 /* see if device passed diags: if master then continue and warn later */
663 if (err
== 0 && device
== 0)
664 /* diagnostic fail : do nothing _YET_ */
665 ap
->device
[device
].horkage
|= ATA_HORKAGE_DIAGNOSTIC
;
668 else if ((device
== 0) && (err
== 0x81))
673 /* determine if device is ATA or ATAPI */
674 class = ata_dev_classify(&tf
);
676 if (class == ATA_DEV_UNKNOWN
)
678 if ((class == ATA_DEV_ATA
) && (ata_chk_status(ap
) == 0))
684 * ata_id_string - Convert IDENTIFY DEVICE page into string
685 * @id: IDENTIFY DEVICE results we will examine
686 * @s: string into which data is output
687 * @ofs: offset into identify device page
688 * @len: length of string to return. must be an even number.
690 * The strings in the IDENTIFY DEVICE page are broken up into
691 * 16-bit chunks. Run through the string, and output each
692 * 8-bit chunk linearly, regardless of platform.
698 void ata_id_string(const u16
*id
, unsigned char *s
,
699 unsigned int ofs
, unsigned int len
)
718 * ata_id_c_string - Convert IDENTIFY DEVICE page into C string
719 * @id: IDENTIFY DEVICE results we will examine
720 * @s: string into which data is output
721 * @ofs: offset into identify device page
722 * @len: length of string to return. must be an odd number.
724 * This function is identical to ata_id_string except that it
725 * trims trailing spaces and terminates the resulting string with
726 * null. @len must be actual maximum length (even number) + 1.
731 void ata_id_c_string(const u16
*id
, unsigned char *s
,
732 unsigned int ofs
, unsigned int len
)
738 ata_id_string(id
, s
, ofs
, len
- 1);
740 p
= s
+ strnlen(s
, len
- 1);
741 while (p
> s
&& p
[-1] == ' ')
746 static u64
ata_id_n_sectors(const u16
*id
)
748 if (ata_id_has_lba(id
)) {
749 if (ata_id_has_lba48(id
))
750 return ata_id_u64(id
, 100);
752 return ata_id_u32(id
, 60);
754 if (ata_id_current_chs_valid(id
))
755 return ata_id_u32(id
, 57);
757 return id
[1] * id
[3] * id
[6];
762 * ata_noop_dev_select - Select device 0/1 on ATA bus
763 * @ap: ATA channel to manipulate
764 * @device: ATA device (numbered from zero) to select
766 * This function performs no actual function.
768 * May be used as the dev_select() entry in ata_port_operations.
773 void ata_noop_dev_select (struct ata_port
*ap
, unsigned int device
)
779 * ata_std_dev_select - Select device 0/1 on ATA bus
780 * @ap: ATA channel to manipulate
781 * @device: ATA device (numbered from zero) to select
783 * Use the method defined in the ATA specification to
784 * make either device 0, or device 1, active on the
785 * ATA channel. Works with both PIO and MMIO.
787 * May be used as the dev_select() entry in ata_port_operations.
793 void ata_std_dev_select (struct ata_port
*ap
, unsigned int device
)
798 tmp
= ATA_DEVICE_OBS
;
800 tmp
= ATA_DEVICE_OBS
| ATA_DEV1
;
802 if (ap
->flags
& ATA_FLAG_MMIO
) {
803 writeb(tmp
, (void __iomem
*) ap
->ioaddr
.device_addr
);
805 outb(tmp
, ap
->ioaddr
.device_addr
);
807 ata_pause(ap
); /* needed; also flushes, for mmio */
811 * ata_dev_select - Select device 0/1 on ATA bus
812 * @ap: ATA channel to manipulate
813 * @device: ATA device (numbered from zero) to select
814 * @wait: non-zero to wait for Status register BSY bit to clear
815 * @can_sleep: non-zero if context allows sleeping
817 * Use the method defined in the ATA specification to
818 * make either device 0, or device 1, active on the
821 * This is a high-level version of ata_std_dev_select(),
822 * which additionally provides the services of inserting
823 * the proper pauses and status polling, where needed.
829 void ata_dev_select(struct ata_port
*ap
, unsigned int device
,
830 unsigned int wait
, unsigned int can_sleep
)
832 if (ata_msg_probe(ap
))
833 ata_port_printk(ap
, KERN_INFO
, "ata_dev_select: ENTER, ata%u: "
834 "device %u, wait %u\n", ap
->id
, device
, wait
);
839 ap
->ops
->dev_select(ap
, device
);
842 if (can_sleep
&& ap
->device
[device
].class == ATA_DEV_ATAPI
)
849 * ata_dump_id - IDENTIFY DEVICE info debugging output
850 * @id: IDENTIFY DEVICE page to dump
852 * Dump selected 16-bit words from the given IDENTIFY DEVICE
859 static inline void ata_dump_id(const u16
*id
)
861 DPRINTK("49==0x%04x "
871 DPRINTK("80==0x%04x "
881 DPRINTK("88==0x%04x "
888 * ata_id_xfermask - Compute xfermask from the given IDENTIFY data
889 * @id: IDENTIFY data to compute xfer mask from
891 * Compute the xfermask for this device. This is not as trivial
892 * as it seems if we must consider early devices correctly.
894 * FIXME: pre IDE drive timing (do we care ?).
902 static unsigned int ata_id_xfermask(const u16
*id
)
904 unsigned int pio_mask
, mwdma_mask
, udma_mask
;
906 /* Usual case. Word 53 indicates word 64 is valid */
907 if (id
[ATA_ID_FIELD_VALID
] & (1 << 1)) {
908 pio_mask
= id
[ATA_ID_PIO_MODES
] & 0x03;
912 /* If word 64 isn't valid then Word 51 high byte holds
913 * the PIO timing number for the maximum. Turn it into
916 u8 mode
= id
[ATA_ID_OLD_PIO_MODES
] & 0xFF;
917 if (mode
< 5) /* Valid PIO range */
918 pio_mask
= (2 << mode
) - 1;
922 /* But wait.. there's more. Design your standards by
923 * committee and you too can get a free iordy field to
924 * process. However its the speeds not the modes that
925 * are supported... Note drivers using the timing API
926 * will get this right anyway
930 mwdma_mask
= id
[ATA_ID_MWDMA_MODES
] & 0x07;
932 if (ata_id_is_cfa(id
)) {
934 * Process compact flash extended modes
936 int pio
= id
[163] & 0x7;
937 int dma
= (id
[163] >> 3) & 7;
940 pio_mask
|= (1 << 5);
942 pio_mask
|= (1 << 6);
944 mwdma_mask
|= (1 << 3);
946 mwdma_mask
|= (1 << 4);
950 if (id
[ATA_ID_FIELD_VALID
] & (1 << 2))
951 udma_mask
= id
[ATA_ID_UDMA_MODES
] & 0xff;
953 return ata_pack_xfermask(pio_mask
, mwdma_mask
, udma_mask
);
957 * ata_port_queue_task - Queue port_task
958 * @ap: The ata_port to queue port_task for
959 * @fn: workqueue function to be scheduled
960 * @data: data value to pass to workqueue function
961 * @delay: delay time for workqueue function
963 * Schedule @fn(@data) for execution after @delay jiffies using
964 * port_task. There is one port_task per port and it's the
965 * user(low level driver)'s responsibility to make sure that only
966 * one task is active at any given time.
968 * libata core layer takes care of synchronization between
969 * port_task and EH. ata_port_queue_task() may be ignored for EH
973 * Inherited from caller.
975 void ata_port_queue_task(struct ata_port
*ap
, void (*fn
)(void *), void *data
,
980 if (ap
->pflags
& ATA_PFLAG_FLUSH_PORT_TASK
)
983 PREPARE_WORK(&ap
->port_task
, fn
, data
);
986 rc
= queue_work(ata_wq
, &ap
->port_task
);
988 rc
= queue_delayed_work(ata_wq
, &ap
->port_task
, delay
);
990 /* rc == 0 means that another user is using port task */
995 * ata_port_flush_task - Flush port_task
996 * @ap: The ata_port to flush port_task for
998 * After this function completes, port_task is guranteed not to
999 * be running or scheduled.
1002 * Kernel thread context (may sleep)
1004 void ata_port_flush_task(struct ata_port
*ap
)
1006 unsigned long flags
;
1010 spin_lock_irqsave(ap
->lock
, flags
);
1011 ap
->pflags
|= ATA_PFLAG_FLUSH_PORT_TASK
;
1012 spin_unlock_irqrestore(ap
->lock
, flags
);
1014 DPRINTK("flush #1\n");
1015 flush_workqueue(ata_wq
);
1018 * At this point, if a task is running, it's guaranteed to see
1019 * the FLUSH flag; thus, it will never queue pio tasks again.
1022 if (!cancel_delayed_work(&ap
->port_task
)) {
1023 if (ata_msg_ctl(ap
))
1024 ata_port_printk(ap
, KERN_DEBUG
, "%s: flush #2\n",
1026 flush_workqueue(ata_wq
);
1029 spin_lock_irqsave(ap
->lock
, flags
);
1030 ap
->pflags
&= ~ATA_PFLAG_FLUSH_PORT_TASK
;
1031 spin_unlock_irqrestore(ap
->lock
, flags
);
1033 if (ata_msg_ctl(ap
))
1034 ata_port_printk(ap
, KERN_DEBUG
, "%s: EXIT\n", __FUNCTION__
);
1037 void ata_qc_complete_internal(struct ata_queued_cmd
*qc
)
1039 struct completion
*waiting
= qc
->private_data
;
1045 * ata_exec_internal - execute libata internal command
1046 * @dev: Device to which the command is sent
1047 * @tf: Taskfile registers for the command and the result
1048 * @cdb: CDB for packet command
1049 * @dma_dir: Data tranfer direction of the command
1050 * @buf: Data buffer of the command
1051 * @buflen: Length of data buffer
1053 * Executes libata internal command with timeout. @tf contains
1054 * command on entry and result on return. Timeout and error
1055 * conditions are reported via return value. No recovery action
1056 * is taken after a command times out. It's caller's duty to
1057 * clean up after timeout.
1060 * None. Should be called with kernel context, might sleep.
1063 * Zero on success, AC_ERR_* mask on failure
1065 unsigned ata_exec_internal(struct ata_device
*dev
,
1066 struct ata_taskfile
*tf
, const u8
*cdb
,
1067 int dma_dir
, void *buf
, unsigned int buflen
)
1069 struct ata_port
*ap
= dev
->ap
;
1070 u8 command
= tf
->command
;
1071 struct ata_queued_cmd
*qc
;
1072 unsigned int tag
, preempted_tag
;
1073 u32 preempted_sactive
, preempted_qc_active
;
1074 DECLARE_COMPLETION_ONSTACK(wait
);
1075 unsigned long flags
;
1076 unsigned int err_mask
;
1079 spin_lock_irqsave(ap
->lock
, flags
);
1081 /* no internal command while frozen */
1082 if (ap
->pflags
& ATA_PFLAG_FROZEN
) {
1083 spin_unlock_irqrestore(ap
->lock
, flags
);
1084 return AC_ERR_SYSTEM
;
1087 /* initialize internal qc */
1089 /* XXX: Tag 0 is used for drivers with legacy EH as some
1090 * drivers choke if any other tag is given. This breaks
1091 * ata_tag_internal() test for those drivers. Don't use new
1092 * EH stuff without converting to it.
1094 if (ap
->ops
->error_handler
)
1095 tag
= ATA_TAG_INTERNAL
;
1099 if (test_and_set_bit(tag
, &ap
->qc_allocated
))
1101 qc
= __ata_qc_from_tag(ap
, tag
);
1109 preempted_tag
= ap
->active_tag
;
1110 preempted_sactive
= ap
->sactive
;
1111 preempted_qc_active
= ap
->qc_active
;
1112 ap
->active_tag
= ATA_TAG_POISON
;
1116 /* prepare & issue qc */
1119 memcpy(qc
->cdb
, cdb
, ATAPI_CDB_LEN
);
1120 qc
->flags
|= ATA_QCFLAG_RESULT_TF
;
1121 qc
->dma_dir
= dma_dir
;
1122 if (dma_dir
!= DMA_NONE
) {
1123 ata_sg_init_one(qc
, buf
, buflen
);
1124 qc
->nsect
= buflen
/ ATA_SECT_SIZE
;
1127 qc
->private_data
= &wait
;
1128 qc
->complete_fn
= ata_qc_complete_internal
;
1132 spin_unlock_irqrestore(ap
->lock
, flags
);
1134 rc
= wait_for_completion_timeout(&wait
, ata_probe_timeout
);
1136 ata_port_flush_task(ap
);
1139 spin_lock_irqsave(ap
->lock
, flags
);
1141 /* We're racing with irq here. If we lose, the
1142 * following test prevents us from completing the qc
1143 * twice. If we win, the port is frozen and will be
1144 * cleaned up by ->post_internal_cmd().
1146 if (qc
->flags
& ATA_QCFLAG_ACTIVE
) {
1147 qc
->err_mask
|= AC_ERR_TIMEOUT
;
1149 if (ap
->ops
->error_handler
)
1150 ata_port_freeze(ap
);
1152 ata_qc_complete(qc
);
1154 if (ata_msg_warn(ap
))
1155 ata_dev_printk(dev
, KERN_WARNING
,
1156 "qc timeout (cmd 0x%x)\n", command
);
1159 spin_unlock_irqrestore(ap
->lock
, flags
);
1162 /* do post_internal_cmd */
1163 if (ap
->ops
->post_internal_cmd
)
1164 ap
->ops
->post_internal_cmd(qc
);
1166 if (qc
->flags
& ATA_QCFLAG_FAILED
&& !qc
->err_mask
) {
1167 if (ata_msg_warn(ap
))
1168 ata_dev_printk(dev
, KERN_WARNING
,
1169 "zero err_mask for failed "
1170 "internal command, assuming AC_ERR_OTHER\n");
1171 qc
->err_mask
|= AC_ERR_OTHER
;
1175 spin_lock_irqsave(ap
->lock
, flags
);
1177 *tf
= qc
->result_tf
;
1178 err_mask
= qc
->err_mask
;
1181 ap
->active_tag
= preempted_tag
;
1182 ap
->sactive
= preempted_sactive
;
1183 ap
->qc_active
= preempted_qc_active
;
1185 /* XXX - Some LLDDs (sata_mv) disable port on command failure.
1186 * Until those drivers are fixed, we detect the condition
1187 * here, fail the command with AC_ERR_SYSTEM and reenable the
1190 * Note that this doesn't change any behavior as internal
1191 * command failure results in disabling the device in the
1192 * higher layer for LLDDs without new reset/EH callbacks.
1194 * Kill the following code as soon as those drivers are fixed.
1196 if (ap
->flags
& ATA_FLAG_DISABLED
) {
1197 err_mask
|= AC_ERR_SYSTEM
;
1201 spin_unlock_irqrestore(ap
->lock
, flags
);
1207 * ata_do_simple_cmd - execute simple internal command
1208 * @dev: Device to which the command is sent
1209 * @cmd: Opcode to execute
1211 * Execute a 'simple' command, that only consists of the opcode
1212 * 'cmd' itself, without filling any other registers
1215 * Kernel thread context (may sleep).
1218 * Zero on success, AC_ERR_* mask on failure
1220 unsigned int ata_do_simple_cmd(struct ata_device
*dev
, u8 cmd
)
1222 struct ata_taskfile tf
;
1224 ata_tf_init(dev
, &tf
);
1227 tf
.flags
|= ATA_TFLAG_DEVICE
;
1228 tf
.protocol
= ATA_PROT_NODATA
;
1230 return ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0);
1234 * ata_pio_need_iordy - check if iordy needed
1237 * Check if the current speed of the device requires IORDY. Used
1238 * by various controllers for chip configuration.
1241 unsigned int ata_pio_need_iordy(const struct ata_device
*adev
)
1244 int speed
= adev
->pio_mode
- XFER_PIO_0
;
1251 /* If we have no drive specific rule, then PIO 2 is non IORDY */
1253 if (adev
->id
[ATA_ID_FIELD_VALID
] & 2) { /* EIDE */
1254 pio
= adev
->id
[ATA_ID_EIDE_PIO
];
1255 /* Is the speed faster than the drive allows non IORDY ? */
1257 /* This is cycle times not frequency - watch the logic! */
1258 if (pio
> 240) /* PIO2 is 240nS per cycle */
1267 * ata_dev_read_id - Read ID data from the specified device
1268 * @dev: target device
1269 * @p_class: pointer to class of the target device (may be changed)
1270 * @flags: ATA_READID_* flags
1271 * @id: buffer to read IDENTIFY data into
1273 * Read ID data from the specified device. ATA_CMD_ID_ATA is
1274 * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
1275 * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS
1276 * for pre-ATA4 drives.
1279 * Kernel thread context (may sleep)
1282 * 0 on success, -errno otherwise.
1284 int ata_dev_read_id(struct ata_device
*dev
, unsigned int *p_class
,
1285 unsigned int flags
, u16
*id
)
1287 struct ata_port
*ap
= dev
->ap
;
1288 unsigned int class = *p_class
;
1289 struct ata_taskfile tf
;
1290 unsigned int err_mask
= 0;
1294 if (ata_msg_ctl(ap
))
1295 ata_dev_printk(dev
, KERN_DEBUG
, "%s: ENTER, host %u, dev %u\n",
1296 __FUNCTION__
, ap
->id
, dev
->devno
);
1298 ata_dev_select(ap
, dev
->devno
, 1, 1); /* select device 0/1 */
1301 ata_tf_init(dev
, &tf
);
1305 tf
.command
= ATA_CMD_ID_ATA
;
1308 tf
.command
= ATA_CMD_ID_ATAPI
;
1312 reason
= "unsupported class";
1316 tf
.protocol
= ATA_PROT_PIO
;
1318 /* presence detection using polling IDENTIFY? */
1319 if (flags
& ATA_READID_DETECT
)
1320 tf
.flags
|= ATA_TFLAG_POLLING
;
1322 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_FROM_DEVICE
,
1323 id
, sizeof(id
[0]) * ATA_ID_WORDS
);
1325 if ((flags
& ATA_READID_DETECT
) &&
1326 (err_mask
& AC_ERR_NODEV_HINT
)) {
1327 DPRINTK("ata%u.%d: NODEV after polling detection\n",
1328 ap
->id
, dev
->devno
);
1333 reason
= "I/O error";
1337 swap_buf_le16(id
, ATA_ID_WORDS
);
1341 reason
= "device reports illegal type";
1343 if (class == ATA_DEV_ATA
) {
1344 if (!ata_id_is_ata(id
) && !ata_id_is_cfa(id
))
1347 if (ata_id_is_ata(id
))
1351 if ((flags
& ATA_READID_POSTRESET
) && class == ATA_DEV_ATA
) {
1353 * The exact sequence expected by certain pre-ATA4 drives is:
1356 * INITIALIZE DEVICE PARAMETERS
1358 * Some drives were very specific about that exact sequence.
1360 if (ata_id_major_version(id
) < 4 || !ata_id_has_lba(id
)) {
1361 err_mask
= ata_dev_init_params(dev
, id
[3], id
[6]);
1364 reason
= "INIT_DEV_PARAMS failed";
1368 /* current CHS translation info (id[53-58]) might be
1369 * changed. reread the identify device info.
1371 flags
&= ~ATA_READID_POSTRESET
;
1381 if (ata_msg_warn(ap
))
1382 ata_dev_printk(dev
, KERN_WARNING
, "failed to IDENTIFY "
1383 "(%s, err_mask=0x%x)\n", reason
, err_mask
);
1387 static inline u8
ata_dev_knobble(struct ata_device
*dev
)
1389 return ((dev
->ap
->cbl
== ATA_CBL_SATA
) && (!ata_id_is_sata(dev
->id
)));
1392 static void ata_dev_config_ncq(struct ata_device
*dev
,
1393 char *desc
, size_t desc_sz
)
1395 struct ata_port
*ap
= dev
->ap
;
1396 int hdepth
= 0, ddepth
= ata_id_queue_depth(dev
->id
);
1398 if (!ata_id_has_ncq(dev
->id
)) {
1402 if (ata_device_blacklisted(dev
) & ATA_HORKAGE_NONCQ
) {
1403 snprintf(desc
, desc_sz
, "NCQ (not used)");
1406 if (ap
->flags
& ATA_FLAG_NCQ
) {
1407 hdepth
= min(ap
->scsi_host
->can_queue
, ATA_MAX_QUEUE
- 1);
1408 dev
->flags
|= ATA_DFLAG_NCQ
;
1411 if (hdepth
>= ddepth
)
1412 snprintf(desc
, desc_sz
, "NCQ (depth %d)", ddepth
);
1414 snprintf(desc
, desc_sz
, "NCQ (depth %d/%d)", hdepth
, ddepth
);
1417 static void ata_set_port_max_cmd_len(struct ata_port
*ap
)
1421 if (ap
->scsi_host
) {
1422 unsigned int len
= 0;
1424 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
1425 len
= max(len
, ap
->device
[i
].cdb_len
);
1427 ap
->scsi_host
->max_cmd_len
= len
;
1432 * ata_dev_configure - Configure the specified ATA/ATAPI device
1433 * @dev: Target device to configure
1435 * Configure @dev according to @dev->id. Generic and low-level
1436 * driver specific fixups are also applied.
1439 * Kernel thread context (may sleep)
1442 * 0 on success, -errno otherwise
1444 int ata_dev_configure(struct ata_device
*dev
)
1446 struct ata_port
*ap
= dev
->ap
;
1447 int print_info
= ap
->eh_context
.i
.flags
& ATA_EHI_PRINTINFO
;
1448 const u16
*id
= dev
->id
;
1449 unsigned int xfer_mask
;
1450 char revbuf
[7]; /* XYZ-99\0 */
1453 if (!ata_dev_enabled(dev
) && ata_msg_info(ap
)) {
1454 ata_dev_printk(dev
, KERN_INFO
,
1455 "%s: ENTER/EXIT (host %u, dev %u) -- nodev\n",
1456 __FUNCTION__
, ap
->id
, dev
->devno
);
1460 if (ata_msg_probe(ap
))
1461 ata_dev_printk(dev
, KERN_DEBUG
, "%s: ENTER, host %u, dev %u\n",
1462 __FUNCTION__
, ap
->id
, dev
->devno
);
1464 /* print device capabilities */
1465 if (ata_msg_probe(ap
))
1466 ata_dev_printk(dev
, KERN_DEBUG
,
1467 "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x "
1468 "85:%04x 86:%04x 87:%04x 88:%04x\n",
1470 id
[49], id
[82], id
[83], id
[84],
1471 id
[85], id
[86], id
[87], id
[88]);
1473 /* initialize to-be-configured parameters */
1474 dev
->flags
&= ~ATA_DFLAG_CFG_MASK
;
1475 dev
->max_sectors
= 0;
1483 * common ATA, ATAPI feature tests
1486 /* find max transfer mode; for printk only */
1487 xfer_mask
= ata_id_xfermask(id
);
1489 if (ata_msg_probe(ap
))
1492 /* ATA-specific feature tests */
1493 if (dev
->class == ATA_DEV_ATA
) {
1494 if (ata_id_is_cfa(id
)) {
1495 if (id
[162] & 1) /* CPRM may make this media unusable */
1496 ata_dev_printk(dev
, KERN_WARNING
, "ata%u: device %u supports DRM functions and may not be fully accessable.\n",
1497 ap
->id
, dev
->devno
);
1498 snprintf(revbuf
, 7, "CFA");
1501 snprintf(revbuf
, 7, "ATA-%d", ata_id_major_version(id
));
1503 dev
->n_sectors
= ata_id_n_sectors(id
);
1505 if (ata_id_has_lba(id
)) {
1506 const char *lba_desc
;
1510 dev
->flags
|= ATA_DFLAG_LBA
;
1511 if (ata_id_has_lba48(id
)) {
1512 dev
->flags
|= ATA_DFLAG_LBA48
;
1515 if (dev
->n_sectors
>= (1UL << 28) &&
1516 ata_id_has_flush_ext(id
))
1517 dev
->flags
|= ATA_DFLAG_FLUSH_EXT
;
1521 ata_dev_config_ncq(dev
, ncq_desc
, sizeof(ncq_desc
));
1523 /* print device info to dmesg */
1524 if (ata_msg_drv(ap
) && print_info
)
1525 ata_dev_printk(dev
, KERN_INFO
, "%s, "
1526 "max %s, %Lu sectors: %s %s\n",
1528 ata_mode_string(xfer_mask
),
1529 (unsigned long long)dev
->n_sectors
,
1530 lba_desc
, ncq_desc
);
1534 /* Default translation */
1535 dev
->cylinders
= id
[1];
1537 dev
->sectors
= id
[6];
1539 if (ata_id_current_chs_valid(id
)) {
1540 /* Current CHS translation is valid. */
1541 dev
->cylinders
= id
[54];
1542 dev
->heads
= id
[55];
1543 dev
->sectors
= id
[56];
1546 /* print device info to dmesg */
1547 if (ata_msg_drv(ap
) && print_info
)
1548 ata_dev_printk(dev
, KERN_INFO
, "%s, "
1549 "max %s, %Lu sectors: CHS %u/%u/%u\n",
1551 ata_mode_string(xfer_mask
),
1552 (unsigned long long)dev
->n_sectors
,
1553 dev
->cylinders
, dev
->heads
,
1557 if (dev
->id
[59] & 0x100) {
1558 dev
->multi_count
= dev
->id
[59] & 0xff;
1559 if (ata_msg_drv(ap
) && print_info
)
1560 ata_dev_printk(dev
, KERN_INFO
,
1561 "ata%u: dev %u multi count %u\n",
1562 ap
->id
, dev
->devno
, dev
->multi_count
);
1568 /* ATAPI-specific feature tests */
1569 else if (dev
->class == ATA_DEV_ATAPI
) {
1570 char *cdb_intr_string
= "";
1572 rc
= atapi_cdb_len(id
);
1573 if ((rc
< 12) || (rc
> ATAPI_CDB_LEN
)) {
1574 if (ata_msg_warn(ap
))
1575 ata_dev_printk(dev
, KERN_WARNING
,
1576 "unsupported CDB len\n");
1580 dev
->cdb_len
= (unsigned int) rc
;
1582 if (ata_id_cdb_intr(dev
->id
)) {
1583 dev
->flags
|= ATA_DFLAG_CDB_INTR
;
1584 cdb_intr_string
= ", CDB intr";
1587 /* print device info to dmesg */
1588 if (ata_msg_drv(ap
) && print_info
)
1589 ata_dev_printk(dev
, KERN_INFO
, "ATAPI, max %s%s\n",
1590 ata_mode_string(xfer_mask
),
1594 /* determine max_sectors */
1595 dev
->max_sectors
= ATA_MAX_SECTORS
;
1596 if (dev
->flags
& ATA_DFLAG_LBA48
)
1597 dev
->max_sectors
= ATA_MAX_SECTORS_LBA48
;
1599 if (dev
->horkage
& ATA_HORKAGE_DIAGNOSTIC
) {
1600 /* Let the user know. We don't want to disallow opens for
1601 rescue purposes, or in case the vendor is just a blithering
1604 ata_dev_printk(dev
, KERN_WARNING
,
1605 "Drive reports diagnostics failure. This may indicate a drive\n");
1606 ata_dev_printk(dev
, KERN_WARNING
,
1607 "fault or invalid emulation. Contact drive vendor for information.\n");
1611 ata_set_port_max_cmd_len(ap
);
1613 /* limit bridge transfers to udma5, 200 sectors */
1614 if (ata_dev_knobble(dev
)) {
1615 if (ata_msg_drv(ap
) && print_info
)
1616 ata_dev_printk(dev
, KERN_INFO
,
1617 "applying bridge limits\n");
1618 dev
->udma_mask
&= ATA_UDMA5
;
1619 dev
->max_sectors
= ATA_MAX_SECTORS
;
1622 if (ap
->ops
->dev_config
)
1623 ap
->ops
->dev_config(ap
, dev
);
1625 if (ata_msg_probe(ap
))
1626 ata_dev_printk(dev
, KERN_DEBUG
, "%s: EXIT, drv_stat = 0x%x\n",
1627 __FUNCTION__
, ata_chk_status(ap
));
1631 if (ata_msg_probe(ap
))
1632 ata_dev_printk(dev
, KERN_DEBUG
,
1633 "%s: EXIT, err\n", __FUNCTION__
);
1638 * ata_bus_probe - Reset and probe ATA bus
1641 * Master ATA bus probing function. Initiates a hardware-dependent
1642 * bus reset, then attempts to identify any devices found on
1646 * PCI/etc. bus probe sem.
1649 * Zero on success, negative errno otherwise.
1652 int ata_bus_probe(struct ata_port
*ap
)
1654 unsigned int classes
[ATA_MAX_DEVICES
];
1655 int tries
[ATA_MAX_DEVICES
];
1656 int i
, rc
, down_xfermask
;
1657 struct ata_device
*dev
;
1661 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
1662 tries
[i
] = ATA_PROBE_MAX_TRIES
;
1667 /* reset and determine device classes */
1668 ap
->ops
->phy_reset(ap
);
1670 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
1671 dev
= &ap
->device
[i
];
1673 if (!(ap
->flags
& ATA_FLAG_DISABLED
) &&
1674 dev
->class != ATA_DEV_UNKNOWN
)
1675 classes
[dev
->devno
] = dev
->class;
1677 classes
[dev
->devno
] = ATA_DEV_NONE
;
1679 dev
->class = ATA_DEV_UNKNOWN
;
1684 /* after the reset the device state is PIO 0 and the controller
1685 state is undefined. Record the mode */
1687 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
1688 ap
->device
[i
].pio_mode
= XFER_PIO_0
;
1690 /* read IDENTIFY page and configure devices */
1691 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
1692 dev
= &ap
->device
[i
];
1695 dev
->class = classes
[i
];
1697 if (!ata_dev_enabled(dev
))
1700 rc
= ata_dev_read_id(dev
, &dev
->class, ATA_READID_POSTRESET
,
1705 ap
->eh_context
.i
.flags
|= ATA_EHI_PRINTINFO
;
1706 rc
= ata_dev_configure(dev
);
1707 ap
->eh_context
.i
.flags
&= ~ATA_EHI_PRINTINFO
;
1712 /* configure transfer mode */
1713 rc
= ata_set_mode(ap
, &dev
);
1719 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
1720 if (ata_dev_enabled(&ap
->device
[i
]))
1723 /* no device present, disable port */
1724 ata_port_disable(ap
);
1725 ap
->ops
->port_disable(ap
);
1732 tries
[dev
->devno
] = 0;
1735 sata_down_spd_limit(ap
);
1738 tries
[dev
->devno
]--;
1739 if (down_xfermask
&&
1740 ata_down_xfermask_limit(dev
, tries
[dev
->devno
] == 1))
1741 tries
[dev
->devno
] = 0;
1744 if (!tries
[dev
->devno
]) {
1745 ata_down_xfermask_limit(dev
, 1);
1746 ata_dev_disable(dev
);
1753 * ata_port_probe - Mark port as enabled
1754 * @ap: Port for which we indicate enablement
1756 * Modify @ap data structure such that the system
1757 * thinks that the entire port is enabled.
1759 * LOCKING: host lock, or some other form of
1763 void ata_port_probe(struct ata_port
*ap
)
1765 ap
->flags
&= ~ATA_FLAG_DISABLED
;
1769 * sata_print_link_status - Print SATA link status
1770 * @ap: SATA port to printk link status about
1772 * This function prints link speed and status of a SATA link.
1777 static void sata_print_link_status(struct ata_port
*ap
)
1779 u32 sstatus
, scontrol
, tmp
;
1781 if (sata_scr_read(ap
, SCR_STATUS
, &sstatus
))
1783 sata_scr_read(ap
, SCR_CONTROL
, &scontrol
);
1785 if (ata_port_online(ap
)) {
1786 tmp
= (sstatus
>> 4) & 0xf;
1787 ata_port_printk(ap
, KERN_INFO
,
1788 "SATA link up %s (SStatus %X SControl %X)\n",
1789 sata_spd_string(tmp
), sstatus
, scontrol
);
1791 ata_port_printk(ap
, KERN_INFO
,
1792 "SATA link down (SStatus %X SControl %X)\n",
1798 * __sata_phy_reset - Wake/reset a low-level SATA PHY
1799 * @ap: SATA port associated with target SATA PHY.
1801 * This function issues commands to standard SATA Sxxx
1802 * PHY registers, to wake up the phy (and device), and
1803 * clear any reset condition.
1806 * PCI/etc. bus probe sem.
1809 void __sata_phy_reset(struct ata_port
*ap
)
1812 unsigned long timeout
= jiffies
+ (HZ
* 5);
1814 if (ap
->flags
& ATA_FLAG_SATA_RESET
) {
1815 /* issue phy wake/reset */
1816 sata_scr_write_flush(ap
, SCR_CONTROL
, 0x301);
1817 /* Couldn't find anything in SATA I/II specs, but
1818 * AHCI-1.1 10.4.2 says at least 1 ms. */
1821 /* phy wake/clear reset */
1822 sata_scr_write_flush(ap
, SCR_CONTROL
, 0x300);
1824 /* wait for phy to become ready, if necessary */
1827 sata_scr_read(ap
, SCR_STATUS
, &sstatus
);
1828 if ((sstatus
& 0xf) != 1)
1830 } while (time_before(jiffies
, timeout
));
1832 /* print link status */
1833 sata_print_link_status(ap
);
1835 /* TODO: phy layer with polling, timeouts, etc. */
1836 if (!ata_port_offline(ap
))
1839 ata_port_disable(ap
);
1841 if (ap
->flags
& ATA_FLAG_DISABLED
)
1844 if (ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
)) {
1845 ata_port_disable(ap
);
1849 ap
->cbl
= ATA_CBL_SATA
;
1853 * sata_phy_reset - Reset SATA bus.
1854 * @ap: SATA port associated with target SATA PHY.
1856 * This function resets the SATA bus, and then probes
1857 * the bus for devices.
1860 * PCI/etc. bus probe sem.
1863 void sata_phy_reset(struct ata_port
*ap
)
1865 __sata_phy_reset(ap
);
1866 if (ap
->flags
& ATA_FLAG_DISABLED
)
1872 * ata_dev_pair - return other device on cable
1875 * Obtain the other device on the same cable, or if none is
1876 * present NULL is returned
1879 struct ata_device
*ata_dev_pair(struct ata_device
*adev
)
1881 struct ata_port
*ap
= adev
->ap
;
1882 struct ata_device
*pair
= &ap
->device
[1 - adev
->devno
];
1883 if (!ata_dev_enabled(pair
))
1889 * ata_port_disable - Disable port.
1890 * @ap: Port to be disabled.
1892 * Modify @ap data structure such that the system
1893 * thinks that the entire port is disabled, and should
1894 * never attempt to probe or communicate with devices
1897 * LOCKING: host lock, or some other form of
1901 void ata_port_disable(struct ata_port
*ap
)
1903 ap
->device
[0].class = ATA_DEV_NONE
;
1904 ap
->device
[1].class = ATA_DEV_NONE
;
1905 ap
->flags
|= ATA_FLAG_DISABLED
;
1909 * sata_down_spd_limit - adjust SATA spd limit downward
1910 * @ap: Port to adjust SATA spd limit for
1912 * Adjust SATA spd limit of @ap downward. Note that this
1913 * function only adjusts the limit. The change must be applied
1914 * using sata_set_spd().
1917 * Inherited from caller.
1920 * 0 on success, negative errno on failure
1922 int sata_down_spd_limit(struct ata_port
*ap
)
1924 u32 sstatus
, spd
, mask
;
1927 rc
= sata_scr_read(ap
, SCR_STATUS
, &sstatus
);
1931 mask
= ap
->sata_spd_limit
;
1934 highbit
= fls(mask
) - 1;
1935 mask
&= ~(1 << highbit
);
1937 spd
= (sstatus
>> 4) & 0xf;
1941 mask
&= (1 << spd
) - 1;
1945 ap
->sata_spd_limit
= mask
;
1947 ata_port_printk(ap
, KERN_WARNING
, "limiting SATA link speed to %s\n",
1948 sata_spd_string(fls(mask
)));
1953 static int __sata_set_spd_needed(struct ata_port
*ap
, u32
*scontrol
)
1957 if (ap
->sata_spd_limit
== UINT_MAX
)
1960 limit
= fls(ap
->sata_spd_limit
);
1962 spd
= (*scontrol
>> 4) & 0xf;
1963 *scontrol
= (*scontrol
& ~0xf0) | ((limit
& 0xf) << 4);
1965 return spd
!= limit
;
1969 * sata_set_spd_needed - is SATA spd configuration needed
1970 * @ap: Port in question
1972 * Test whether the spd limit in SControl matches
1973 * @ap->sata_spd_limit. This function is used to determine
1974 * whether hardreset is necessary to apply SATA spd
1978 * Inherited from caller.
1981 * 1 if SATA spd configuration is needed, 0 otherwise.
1983 int sata_set_spd_needed(struct ata_port
*ap
)
1987 if (sata_scr_read(ap
, SCR_CONTROL
, &scontrol
))
1990 return __sata_set_spd_needed(ap
, &scontrol
);
1994 * sata_set_spd - set SATA spd according to spd limit
1995 * @ap: Port to set SATA spd for
1997 * Set SATA spd of @ap according to sata_spd_limit.
2000 * Inherited from caller.
2003 * 0 if spd doesn't need to be changed, 1 if spd has been
2004 * changed. Negative errno if SCR registers are inaccessible.
2006 int sata_set_spd(struct ata_port
*ap
)
2011 if ((rc
= sata_scr_read(ap
, SCR_CONTROL
, &scontrol
)))
2014 if (!__sata_set_spd_needed(ap
, &scontrol
))
2017 if ((rc
= sata_scr_write(ap
, SCR_CONTROL
, scontrol
)))
2024 * This mode timing computation functionality is ported over from
2025 * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik
2028 * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
2029 * These were taken from ATA/ATAPI-6 standard, rev 0a, except
2030 * for UDMA6, which is currently supported only by Maxtor drives.
2032 * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0.
2035 static const struct ata_timing ata_timing
[] = {
2037 { XFER_UDMA_6
, 0, 0, 0, 0, 0, 0, 0, 15 },
2038 { XFER_UDMA_5
, 0, 0, 0, 0, 0, 0, 0, 20 },
2039 { XFER_UDMA_4
, 0, 0, 0, 0, 0, 0, 0, 30 },
2040 { XFER_UDMA_3
, 0, 0, 0, 0, 0, 0, 0, 45 },
2042 { XFER_MW_DMA_4
, 25, 0, 0, 0, 55, 20, 80, 0 },
2043 { XFER_MW_DMA_3
, 25, 0, 0, 0, 65, 25, 100, 0 },
2044 { XFER_UDMA_2
, 0, 0, 0, 0, 0, 0, 0, 60 },
2045 { XFER_UDMA_1
, 0, 0, 0, 0, 0, 0, 0, 80 },
2046 { XFER_UDMA_0
, 0, 0, 0, 0, 0, 0, 0, 120 },
2048 /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */
2050 { XFER_MW_DMA_2
, 25, 0, 0, 0, 70, 25, 120, 0 },
2051 { XFER_MW_DMA_1
, 45, 0, 0, 0, 80, 50, 150, 0 },
2052 { XFER_MW_DMA_0
, 60, 0, 0, 0, 215, 215, 480, 0 },
2054 { XFER_SW_DMA_2
, 60, 0, 0, 0, 120, 120, 240, 0 },
2055 { XFER_SW_DMA_1
, 90, 0, 0, 0, 240, 240, 480, 0 },
2056 { XFER_SW_DMA_0
, 120, 0, 0, 0, 480, 480, 960, 0 },
2058 { XFER_PIO_6
, 10, 55, 20, 80, 55, 20, 80, 0 },
2059 { XFER_PIO_5
, 15, 65, 25, 100, 65, 25, 100, 0 },
2060 { XFER_PIO_4
, 25, 70, 25, 120, 70, 25, 120, 0 },
2061 { XFER_PIO_3
, 30, 80, 70, 180, 80, 70, 180, 0 },
2063 { XFER_PIO_2
, 30, 290, 40, 330, 100, 90, 240, 0 },
2064 { XFER_PIO_1
, 50, 290, 93, 383, 125, 100, 383, 0 },
2065 { XFER_PIO_0
, 70, 290, 240, 600, 165, 150, 600, 0 },
2067 /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */
2072 #define ENOUGH(v,unit) (((v)-1)/(unit)+1)
2073 #define EZ(v,unit) ((v)?ENOUGH(v,unit):0)
2075 static void ata_timing_quantize(const struct ata_timing
*t
, struct ata_timing
*q
, int T
, int UT
)
2077 q
->setup
= EZ(t
->setup
* 1000, T
);
2078 q
->act8b
= EZ(t
->act8b
* 1000, T
);
2079 q
->rec8b
= EZ(t
->rec8b
* 1000, T
);
2080 q
->cyc8b
= EZ(t
->cyc8b
* 1000, T
);
2081 q
->active
= EZ(t
->active
* 1000, T
);
2082 q
->recover
= EZ(t
->recover
* 1000, T
);
2083 q
->cycle
= EZ(t
->cycle
* 1000, T
);
2084 q
->udma
= EZ(t
->udma
* 1000, UT
);
2087 void ata_timing_merge(const struct ata_timing
*a
, const struct ata_timing
*b
,
2088 struct ata_timing
*m
, unsigned int what
)
2090 if (what
& ATA_TIMING_SETUP
) m
->setup
= max(a
->setup
, b
->setup
);
2091 if (what
& ATA_TIMING_ACT8B
) m
->act8b
= max(a
->act8b
, b
->act8b
);
2092 if (what
& ATA_TIMING_REC8B
) m
->rec8b
= max(a
->rec8b
, b
->rec8b
);
2093 if (what
& ATA_TIMING_CYC8B
) m
->cyc8b
= max(a
->cyc8b
, b
->cyc8b
);
2094 if (what
& ATA_TIMING_ACTIVE
) m
->active
= max(a
->active
, b
->active
);
2095 if (what
& ATA_TIMING_RECOVER
) m
->recover
= max(a
->recover
, b
->recover
);
2096 if (what
& ATA_TIMING_CYCLE
) m
->cycle
= max(a
->cycle
, b
->cycle
);
2097 if (what
& ATA_TIMING_UDMA
) m
->udma
= max(a
->udma
, b
->udma
);
2100 static const struct ata_timing
* ata_timing_find_mode(unsigned short speed
)
2102 const struct ata_timing
*t
;
2104 for (t
= ata_timing
; t
->mode
!= speed
; t
++)
2105 if (t
->mode
== 0xFF)
2110 int ata_timing_compute(struct ata_device
*adev
, unsigned short speed
,
2111 struct ata_timing
*t
, int T
, int UT
)
2113 const struct ata_timing
*s
;
2114 struct ata_timing p
;
2120 if (!(s
= ata_timing_find_mode(speed
)))
2123 memcpy(t
, s
, sizeof(*s
));
2126 * If the drive is an EIDE drive, it can tell us it needs extended
2127 * PIO/MW_DMA cycle timing.
2130 if (adev
->id
[ATA_ID_FIELD_VALID
] & 2) { /* EIDE drive */
2131 memset(&p
, 0, sizeof(p
));
2132 if(speed
>= XFER_PIO_0
&& speed
<= XFER_SW_DMA_0
) {
2133 if (speed
<= XFER_PIO_2
) p
.cycle
= p
.cyc8b
= adev
->id
[ATA_ID_EIDE_PIO
];
2134 else p
.cycle
= p
.cyc8b
= adev
->id
[ATA_ID_EIDE_PIO_IORDY
];
2135 } else if(speed
>= XFER_MW_DMA_0
&& speed
<= XFER_MW_DMA_2
) {
2136 p
.cycle
= adev
->id
[ATA_ID_EIDE_DMA_MIN
];
2138 ata_timing_merge(&p
, t
, t
, ATA_TIMING_CYCLE
| ATA_TIMING_CYC8B
);
2142 * Convert the timing to bus clock counts.
2145 ata_timing_quantize(t
, t
, T
, UT
);
2148 * Even in DMA/UDMA modes we still use PIO access for IDENTIFY,
2149 * S.M.A.R.T * and some other commands. We have to ensure that the
2150 * DMA cycle timing is slower/equal than the fastest PIO timing.
2153 if (speed
> XFER_PIO_4
) {
2154 ata_timing_compute(adev
, adev
->pio_mode
, &p
, T
, UT
);
2155 ata_timing_merge(&p
, t
, t
, ATA_TIMING_ALL
);
2159 * Lengthen active & recovery time so that cycle time is correct.
2162 if (t
->act8b
+ t
->rec8b
< t
->cyc8b
) {
2163 t
->act8b
+= (t
->cyc8b
- (t
->act8b
+ t
->rec8b
)) / 2;
2164 t
->rec8b
= t
->cyc8b
- t
->act8b
;
2167 if (t
->active
+ t
->recover
< t
->cycle
) {
2168 t
->active
+= (t
->cycle
- (t
->active
+ t
->recover
)) / 2;
2169 t
->recover
= t
->cycle
- t
->active
;
2176 * ata_down_xfermask_limit - adjust dev xfer masks downward
2177 * @dev: Device to adjust xfer masks
2178 * @force_pio0: Force PIO0
2180 * Adjust xfer masks of @dev downward. Note that this function
2181 * does not apply the change. Invoking ata_set_mode() afterwards
2182 * will apply the limit.
2185 * Inherited from caller.
2188 * 0 on success, negative errno on failure
2190 int ata_down_xfermask_limit(struct ata_device
*dev
, int force_pio0
)
2192 unsigned long xfer_mask
;
2195 xfer_mask
= ata_pack_xfermask(dev
->pio_mask
, dev
->mwdma_mask
,
2200 /* don't gear down to MWDMA from UDMA, go directly to PIO */
2201 if (xfer_mask
& ATA_MASK_UDMA
)
2202 xfer_mask
&= ~ATA_MASK_MWDMA
;
2204 highbit
= fls(xfer_mask
) - 1;
2205 xfer_mask
&= ~(1 << highbit
);
2207 xfer_mask
&= 1 << ATA_SHIFT_PIO
;
2211 ata_unpack_xfermask(xfer_mask
, &dev
->pio_mask
, &dev
->mwdma_mask
,
2214 ata_dev_printk(dev
, KERN_WARNING
, "limiting speed to %s\n",
2215 ata_mode_string(xfer_mask
));
2223 static int ata_dev_set_mode(struct ata_device
*dev
)
2225 struct ata_eh_context
*ehc
= &dev
->ap
->eh_context
;
2226 unsigned int err_mask
;
2229 dev
->flags
&= ~ATA_DFLAG_PIO
;
2230 if (dev
->xfer_shift
== ATA_SHIFT_PIO
)
2231 dev
->flags
|= ATA_DFLAG_PIO
;
2233 err_mask
= ata_dev_set_xfermode(dev
);
2235 ata_dev_printk(dev
, KERN_ERR
, "failed to set xfermode "
2236 "(err_mask=0x%x)\n", err_mask
);
2240 ehc
->i
.flags
|= ATA_EHI_POST_SETMODE
;
2241 rc
= ata_dev_revalidate(dev
, 0);
2242 ehc
->i
.flags
&= ~ATA_EHI_POST_SETMODE
;
2246 DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
2247 dev
->xfer_shift
, (int)dev
->xfer_mode
);
2249 ata_dev_printk(dev
, KERN_INFO
, "configured for %s\n",
2250 ata_mode_string(ata_xfer_mode2mask(dev
->xfer_mode
)));
2255 * ata_set_mode - Program timings and issue SET FEATURES - XFER
2256 * @ap: port on which timings will be programmed
2257 * @r_failed_dev: out paramter for failed device
2259 * Set ATA device disk transfer mode (PIO3, UDMA6, etc.). If
2260 * ata_set_mode() fails, pointer to the failing device is
2261 * returned in @r_failed_dev.
2264 * PCI/etc. bus probe sem.
2267 * 0 on success, negative errno otherwise
2269 int ata_set_mode(struct ata_port
*ap
, struct ata_device
**r_failed_dev
)
2271 struct ata_device
*dev
;
2272 int i
, rc
= 0, used_dma
= 0, found
= 0;
2274 /* has private set_mode? */
2275 if (ap
->ops
->set_mode
) {
2276 /* FIXME: make ->set_mode handle no device case and
2277 * return error code and failing device on failure.
2279 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
2280 if (ata_dev_ready(&ap
->device
[i
])) {
2281 ap
->ops
->set_mode(ap
);
2288 /* step 1: calculate xfer_mask */
2289 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
2290 unsigned int pio_mask
, dma_mask
;
2292 dev
= &ap
->device
[i
];
2294 if (!ata_dev_enabled(dev
))
2297 ata_dev_xfermask(dev
);
2299 pio_mask
= ata_pack_xfermask(dev
->pio_mask
, 0, 0);
2300 dma_mask
= ata_pack_xfermask(0, dev
->mwdma_mask
, dev
->udma_mask
);
2301 dev
->pio_mode
= ata_xfer_mask2mode(pio_mask
);
2302 dev
->dma_mode
= ata_xfer_mask2mode(dma_mask
);
2311 /* step 2: always set host PIO timings */
2312 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
2313 dev
= &ap
->device
[i
];
2314 if (!ata_dev_enabled(dev
))
2317 if (!dev
->pio_mode
) {
2318 ata_dev_printk(dev
, KERN_WARNING
, "no PIO support\n");
2323 dev
->xfer_mode
= dev
->pio_mode
;
2324 dev
->xfer_shift
= ATA_SHIFT_PIO
;
2325 if (ap
->ops
->set_piomode
)
2326 ap
->ops
->set_piomode(ap
, dev
);
2329 /* step 3: set host DMA timings */
2330 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
2331 dev
= &ap
->device
[i
];
2333 if (!ata_dev_enabled(dev
) || !dev
->dma_mode
)
2336 dev
->xfer_mode
= dev
->dma_mode
;
2337 dev
->xfer_shift
= ata_xfer_mode2shift(dev
->dma_mode
);
2338 if (ap
->ops
->set_dmamode
)
2339 ap
->ops
->set_dmamode(ap
, dev
);
2342 /* step 4: update devices' xfer mode */
2343 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
2344 dev
= &ap
->device
[i
];
2346 /* don't udpate suspended devices' xfer mode */
2347 if (!ata_dev_ready(dev
))
2350 rc
= ata_dev_set_mode(dev
);
2355 /* Record simplex status. If we selected DMA then the other
2356 * host channels are not permitted to do so.
2358 if (used_dma
&& (ap
->host
->flags
& ATA_HOST_SIMPLEX
))
2359 ap
->host
->simplex_claimed
= 1;
2361 /* step5: chip specific finalisation */
2362 if (ap
->ops
->post_set_mode
)
2363 ap
->ops
->post_set_mode(ap
);
2367 *r_failed_dev
= dev
;
2372 * ata_tf_to_host - issue ATA taskfile to host controller
2373 * @ap: port to which command is being issued
2374 * @tf: ATA taskfile register set
2376 * Issues ATA taskfile register set to ATA host controller,
2377 * with proper synchronization with interrupt handler and
2381 * spin_lock_irqsave(host lock)
2384 static inline void ata_tf_to_host(struct ata_port
*ap
,
2385 const struct ata_taskfile
*tf
)
2387 ap
->ops
->tf_load(ap
, tf
);
2388 ap
->ops
->exec_command(ap
, tf
);
2392 * ata_busy_sleep - sleep until BSY clears, or timeout
2393 * @ap: port containing status register to be polled
2394 * @tmout_pat: impatience timeout
2395 * @tmout: overall timeout
2397 * Sleep until ATA Status register bit BSY clears,
2398 * or a timeout occurs.
2401 * Kernel thread context (may sleep).
2404 * 0 on success, -errno otherwise.
2406 int ata_busy_sleep(struct ata_port
*ap
,
2407 unsigned long tmout_pat
, unsigned long tmout
)
2409 unsigned long timer_start
, timeout
;
2412 status
= ata_busy_wait(ap
, ATA_BUSY
, 300);
2413 timer_start
= jiffies
;
2414 timeout
= timer_start
+ tmout_pat
;
2415 while (status
!= 0xff && (status
& ATA_BUSY
) &&
2416 time_before(jiffies
, timeout
)) {
2418 status
= ata_busy_wait(ap
, ATA_BUSY
, 3);
2421 if (status
!= 0xff && (status
& ATA_BUSY
))
2422 ata_port_printk(ap
, KERN_WARNING
,
2423 "port is slow to respond, please be patient "
2424 "(Status 0x%x)\n", status
);
2426 timeout
= timer_start
+ tmout
;
2427 while (status
!= 0xff && (status
& ATA_BUSY
) &&
2428 time_before(jiffies
, timeout
)) {
2430 status
= ata_chk_status(ap
);
2436 if (status
& ATA_BUSY
) {
2437 ata_port_printk(ap
, KERN_ERR
, "port failed to respond "
2438 "(%lu secs, Status 0x%x)\n",
2439 tmout
/ HZ
, status
);
2446 static void ata_bus_post_reset(struct ata_port
*ap
, unsigned int devmask
)
2448 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
2449 unsigned int dev0
= devmask
& (1 << 0);
2450 unsigned int dev1
= devmask
& (1 << 1);
2451 unsigned long timeout
;
2453 /* if device 0 was found in ata_devchk, wait for its
2457 ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
);
2459 /* if device 1 was found in ata_devchk, wait for
2460 * register access, then wait for BSY to clear
2462 timeout
= jiffies
+ ATA_TMOUT_BOOT
;
2466 ap
->ops
->dev_select(ap
, 1);
2467 if (ap
->flags
& ATA_FLAG_MMIO
) {
2468 nsect
= readb((void __iomem
*) ioaddr
->nsect_addr
);
2469 lbal
= readb((void __iomem
*) ioaddr
->lbal_addr
);
2471 nsect
= inb(ioaddr
->nsect_addr
);
2472 lbal
= inb(ioaddr
->lbal_addr
);
2474 if ((nsect
== 1) && (lbal
== 1))
2476 if (time_after(jiffies
, timeout
)) {
2480 msleep(50); /* give drive a breather */
2483 ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
);
2485 /* is all this really necessary? */
2486 ap
->ops
->dev_select(ap
, 0);
2488 ap
->ops
->dev_select(ap
, 1);
2490 ap
->ops
->dev_select(ap
, 0);
2493 static unsigned int ata_bus_softreset(struct ata_port
*ap
,
2494 unsigned int devmask
)
2496 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
2498 DPRINTK("ata%u: bus reset via SRST\n", ap
->id
);
2500 /* software reset. causes dev0 to be selected */
2501 if (ap
->flags
& ATA_FLAG_MMIO
) {
2502 writeb(ap
->ctl
, (void __iomem
*) ioaddr
->ctl_addr
);
2503 udelay(20); /* FIXME: flush */
2504 writeb(ap
->ctl
| ATA_SRST
, (void __iomem
*) ioaddr
->ctl_addr
);
2505 udelay(20); /* FIXME: flush */
2506 writeb(ap
->ctl
, (void __iomem
*) ioaddr
->ctl_addr
);
2508 outb(ap
->ctl
, ioaddr
->ctl_addr
);
2510 outb(ap
->ctl
| ATA_SRST
, ioaddr
->ctl_addr
);
2512 outb(ap
->ctl
, ioaddr
->ctl_addr
);
2515 /* spec mandates ">= 2ms" before checking status.
2516 * We wait 150ms, because that was the magic delay used for
2517 * ATAPI devices in Hale Landis's ATADRVR, for the period of time
2518 * between when the ATA command register is written, and then
2519 * status is checked. Because waiting for "a while" before
2520 * checking status is fine, post SRST, we perform this magic
2521 * delay here as well.
2523 * Old drivers/ide uses the 2mS rule and then waits for ready
2527 /* Before we perform post reset processing we want to see if
2528 * the bus shows 0xFF because the odd clown forgets the D7
2529 * pulldown resistor.
2531 if (ata_check_status(ap
) == 0xFF)
2534 ata_bus_post_reset(ap
, devmask
);
2540 * ata_bus_reset - reset host port and associated ATA channel
2541 * @ap: port to reset
2543 * This is typically the first time we actually start issuing
2544 * commands to the ATA channel. We wait for BSY to clear, then
2545 * issue EXECUTE DEVICE DIAGNOSTIC command, polling for its
2546 * result. Determine what devices, if any, are on the channel
2547 * by looking at the device 0/1 error register. Look at the signature
2548 * stored in each device's taskfile registers, to determine if
2549 * the device is ATA or ATAPI.
2552 * PCI/etc. bus probe sem.
2553 * Obtains host lock.
2556 * Sets ATA_FLAG_DISABLED if bus reset fails.
2559 void ata_bus_reset(struct ata_port
*ap
)
2561 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
2562 unsigned int slave_possible
= ap
->flags
& ATA_FLAG_SLAVE_POSS
;
2564 unsigned int dev0
, dev1
= 0, devmask
= 0;
2566 DPRINTK("ENTER, host %u, port %u\n", ap
->id
, ap
->port_no
);
2568 /* determine if device 0/1 are present */
2569 if (ap
->flags
& ATA_FLAG_SATA_RESET
)
2572 dev0
= ata_devchk(ap
, 0);
2574 dev1
= ata_devchk(ap
, 1);
2578 devmask
|= (1 << 0);
2580 devmask
|= (1 << 1);
2582 /* select device 0 again */
2583 ap
->ops
->dev_select(ap
, 0);
2585 /* issue bus reset */
2586 if (ap
->flags
& ATA_FLAG_SRST
)
2587 if (ata_bus_softreset(ap
, devmask
))
2591 * determine by signature whether we have ATA or ATAPI devices
2593 ap
->device
[0].class = ata_dev_try_classify(ap
, 0, &err
);
2594 if ((slave_possible
) && (err
!= 0x81))
2595 ap
->device
[1].class = ata_dev_try_classify(ap
, 1, &err
);
2597 /* re-enable interrupts */
2598 if (ap
->ioaddr
.ctl_addr
) /* FIXME: hack. create a hook instead */
2601 /* is double-select really necessary? */
2602 if (ap
->device
[1].class != ATA_DEV_NONE
)
2603 ap
->ops
->dev_select(ap
, 1);
2604 if (ap
->device
[0].class != ATA_DEV_NONE
)
2605 ap
->ops
->dev_select(ap
, 0);
2607 /* if no devices were detected, disable this port */
2608 if ((ap
->device
[0].class == ATA_DEV_NONE
) &&
2609 (ap
->device
[1].class == ATA_DEV_NONE
))
2612 if (ap
->flags
& (ATA_FLAG_SATA_RESET
| ATA_FLAG_SRST
)) {
2613 /* set up device control for ATA_FLAG_SATA_RESET */
2614 if (ap
->flags
& ATA_FLAG_MMIO
)
2615 writeb(ap
->ctl
, (void __iomem
*) ioaddr
->ctl_addr
);
2617 outb(ap
->ctl
, ioaddr
->ctl_addr
);
2624 ata_port_printk(ap
, KERN_ERR
, "disabling port\n");
2625 ap
->ops
->port_disable(ap
);
2631 * sata_phy_debounce - debounce SATA phy status
2632 * @ap: ATA port to debounce SATA phy status for
2633 * @params: timing parameters { interval, duratinon, timeout } in msec
2635 * Make sure SStatus of @ap reaches stable state, determined by
2636 * holding the same value where DET is not 1 for @duration polled
2637 * every @interval, before @timeout. Timeout constraints the
2638 * beginning of the stable state. Because, after hot unplugging,
2639 * DET gets stuck at 1 on some controllers, this functions waits
2640 * until timeout then returns 0 if DET is stable at 1.
2643 * Kernel thread context (may sleep)
2646 * 0 on success, -errno on failure.
2648 int sata_phy_debounce(struct ata_port
*ap
, const unsigned long *params
)
2650 unsigned long interval_msec
= params
[0];
2651 unsigned long duration
= params
[1] * HZ
/ 1000;
2652 unsigned long timeout
= jiffies
+ params
[2] * HZ
/ 1000;
2653 unsigned long last_jiffies
;
2657 if ((rc
= sata_scr_read(ap
, SCR_STATUS
, &cur
)))
2662 last_jiffies
= jiffies
;
2665 msleep(interval_msec
);
2666 if ((rc
= sata_scr_read(ap
, SCR_STATUS
, &cur
)))
2672 if (cur
== 1 && time_before(jiffies
, timeout
))
2674 if (time_after(jiffies
, last_jiffies
+ duration
))
2679 /* unstable, start over */
2681 last_jiffies
= jiffies
;
2684 if (time_after(jiffies
, timeout
))
2690 * sata_phy_resume - resume SATA phy
2691 * @ap: ATA port to resume SATA phy for
2692 * @params: timing parameters { interval, duratinon, timeout } in msec
2694 * Resume SATA phy of @ap and debounce it.
2697 * Kernel thread context (may sleep)
2700 * 0 on success, -errno on failure.
2702 int sata_phy_resume(struct ata_port
*ap
, const unsigned long *params
)
2707 if ((rc
= sata_scr_read(ap
, SCR_CONTROL
, &scontrol
)))
2710 scontrol
= (scontrol
& 0x0f0) | 0x300;
2712 if ((rc
= sata_scr_write(ap
, SCR_CONTROL
, scontrol
)))
2715 /* Some PHYs react badly if SStatus is pounded immediately
2716 * after resuming. Delay 200ms before debouncing.
2720 return sata_phy_debounce(ap
, params
);
2723 static void ata_wait_spinup(struct ata_port
*ap
)
2725 struct ata_eh_context
*ehc
= &ap
->eh_context
;
2726 unsigned long end
, secs
;
2729 /* first, debounce phy if SATA */
2730 if (ap
->cbl
== ATA_CBL_SATA
) {
2731 rc
= sata_phy_debounce(ap
, sata_deb_timing_hotplug
);
2733 /* if debounced successfully and offline, no need to wait */
2734 if ((rc
== 0 || rc
== -EOPNOTSUPP
) && ata_port_offline(ap
))
2738 /* okay, let's give the drive time to spin up */
2739 end
= ehc
->i
.hotplug_timestamp
+ ATA_SPINUP_WAIT
* HZ
/ 1000;
2740 secs
= ((end
- jiffies
) + HZ
- 1) / HZ
;
2742 if (time_after(jiffies
, end
))
2746 ata_port_printk(ap
, KERN_INFO
, "waiting for device to spin up "
2747 "(%lu secs)\n", secs
);
2749 schedule_timeout_uninterruptible(end
- jiffies
);
2753 * ata_std_prereset - prepare for reset
2754 * @ap: ATA port to be reset
2756 * @ap is about to be reset. Initialize it.
2759 * Kernel thread context (may sleep)
2762 * 0 on success, -errno otherwise.
2764 int ata_std_prereset(struct ata_port
*ap
)
2766 struct ata_eh_context
*ehc
= &ap
->eh_context
;
2767 const unsigned long *timing
= sata_ehc_deb_timing(ehc
);
2770 /* handle link resume & hotplug spinup */
2771 if ((ehc
->i
.flags
& ATA_EHI_RESUME_LINK
) &&
2772 (ap
->flags
& ATA_FLAG_HRST_TO_RESUME
))
2773 ehc
->i
.action
|= ATA_EH_HARDRESET
;
2775 if ((ehc
->i
.flags
& ATA_EHI_HOTPLUGGED
) &&
2776 (ap
->flags
& ATA_FLAG_SKIP_D2H_BSY
))
2777 ata_wait_spinup(ap
);
2779 /* if we're about to do hardreset, nothing more to do */
2780 if (ehc
->i
.action
& ATA_EH_HARDRESET
)
2783 /* if SATA, resume phy */
2784 if (ap
->cbl
== ATA_CBL_SATA
) {
2785 rc
= sata_phy_resume(ap
, timing
);
2786 if (rc
&& rc
!= -EOPNOTSUPP
) {
2787 /* phy resume failed */
2788 ata_port_printk(ap
, KERN_WARNING
, "failed to resume "
2789 "link for reset (errno=%d)\n", rc
);
2794 /* Wait for !BSY if the controller can wait for the first D2H
2795 * Reg FIS and we don't know that no device is attached.
2797 if (!(ap
->flags
& ATA_FLAG_SKIP_D2H_BSY
) && !ata_port_offline(ap
))
2798 ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
);
2804 * ata_std_softreset - reset host port via ATA SRST
2805 * @ap: port to reset
2806 * @classes: resulting classes of attached devices
2808 * Reset host port using ATA SRST.
2811 * Kernel thread context (may sleep)
2814 * 0 on success, -errno otherwise.
2816 int ata_std_softreset(struct ata_port
*ap
, unsigned int *classes
)
2818 unsigned int slave_possible
= ap
->flags
& ATA_FLAG_SLAVE_POSS
;
2819 unsigned int devmask
= 0, err_mask
;
2824 if (ata_port_offline(ap
)) {
2825 classes
[0] = ATA_DEV_NONE
;
2829 /* determine if device 0/1 are present */
2830 if (ata_devchk(ap
, 0))
2831 devmask
|= (1 << 0);
2832 if (slave_possible
&& ata_devchk(ap
, 1))
2833 devmask
|= (1 << 1);
2835 /* select device 0 again */
2836 ap
->ops
->dev_select(ap
, 0);
2838 /* issue bus reset */
2839 DPRINTK("about to softreset, devmask=%x\n", devmask
);
2840 err_mask
= ata_bus_softreset(ap
, devmask
);
2842 ata_port_printk(ap
, KERN_ERR
, "SRST failed (err_mask=0x%x)\n",
2847 /* determine by signature whether we have ATA or ATAPI devices */
2848 classes
[0] = ata_dev_try_classify(ap
, 0, &err
);
2849 if (slave_possible
&& err
!= 0x81)
2850 classes
[1] = ata_dev_try_classify(ap
, 1, &err
);
2853 DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes
[0], classes
[1]);
2858 * sata_port_hardreset - reset port via SATA phy reset
2859 * @ap: port to reset
2860 * @timing: timing parameters { interval, duratinon, timeout } in msec
2862 * SATA phy-reset host port using DET bits of SControl register.
2865 * Kernel thread context (may sleep)
2868 * 0 on success, -errno otherwise.
2870 int sata_port_hardreset(struct ata_port
*ap
, const unsigned long *timing
)
2877 if (sata_set_spd_needed(ap
)) {
2878 /* SATA spec says nothing about how to reconfigure
2879 * spd. To be on the safe side, turn off phy during
2880 * reconfiguration. This works for at least ICH7 AHCI
2883 if ((rc
= sata_scr_read(ap
, SCR_CONTROL
, &scontrol
)))
2886 scontrol
= (scontrol
& 0x0f0) | 0x304;
2888 if ((rc
= sata_scr_write(ap
, SCR_CONTROL
, scontrol
)))
2894 /* issue phy wake/reset */
2895 if ((rc
= sata_scr_read(ap
, SCR_CONTROL
, &scontrol
)))
2898 scontrol
= (scontrol
& 0x0f0) | 0x301;
2900 if ((rc
= sata_scr_write_flush(ap
, SCR_CONTROL
, scontrol
)))
2903 /* Couldn't find anything in SATA I/II specs, but AHCI-1.1
2904 * 10.4.2 says at least 1 ms.
2908 /* bring phy back */
2909 rc
= sata_phy_resume(ap
, timing
);
2911 DPRINTK("EXIT, rc=%d\n", rc
);
2916 * sata_std_hardreset - reset host port via SATA phy reset
2917 * @ap: port to reset
2918 * @class: resulting class of attached device
2920 * SATA phy-reset host port using DET bits of SControl register,
2921 * wait for !BSY and classify the attached device.
2924 * Kernel thread context (may sleep)
2927 * 0 on success, -errno otherwise.
2929 int sata_std_hardreset(struct ata_port
*ap
, unsigned int *class)
2931 const unsigned long *timing
= sata_ehc_deb_timing(&ap
->eh_context
);
2937 rc
= sata_port_hardreset(ap
, timing
);
2939 ata_port_printk(ap
, KERN_ERR
,
2940 "COMRESET failed (errno=%d)\n", rc
);
2944 /* TODO: phy layer with polling, timeouts, etc. */
2945 if (ata_port_offline(ap
)) {
2946 *class = ATA_DEV_NONE
;
2947 DPRINTK("EXIT, link offline\n");
2951 if (ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
)) {
2952 ata_port_printk(ap
, KERN_ERR
,
2953 "COMRESET failed (device not ready)\n");
2957 ap
->ops
->dev_select(ap
, 0); /* probably unnecessary */
2959 *class = ata_dev_try_classify(ap
, 0, NULL
);
2961 DPRINTK("EXIT, class=%u\n", *class);
2966 * ata_std_postreset - standard postreset callback
2967 * @ap: the target ata_port
2968 * @classes: classes of attached devices
2970 * This function is invoked after a successful reset. Note that
2971 * the device might have been reset more than once using
2972 * different reset methods before postreset is invoked.
2975 * Kernel thread context (may sleep)
2977 void ata_std_postreset(struct ata_port
*ap
, unsigned int *classes
)
2983 /* print link status */
2984 sata_print_link_status(ap
);
2987 if (sata_scr_read(ap
, SCR_ERROR
, &serror
) == 0)
2988 sata_scr_write(ap
, SCR_ERROR
, serror
);
2990 /* re-enable interrupts */
2991 if (!ap
->ops
->error_handler
) {
2992 /* FIXME: hack. create a hook instead */
2993 if (ap
->ioaddr
.ctl_addr
)
2997 /* is double-select really necessary? */
2998 if (classes
[0] != ATA_DEV_NONE
)
2999 ap
->ops
->dev_select(ap
, 1);
3000 if (classes
[1] != ATA_DEV_NONE
)
3001 ap
->ops
->dev_select(ap
, 0);
3003 /* bail out if no device is present */
3004 if (classes
[0] == ATA_DEV_NONE
&& classes
[1] == ATA_DEV_NONE
) {
3005 DPRINTK("EXIT, no device\n");
3009 /* set up device control */
3010 if (ap
->ioaddr
.ctl_addr
) {
3011 if (ap
->flags
& ATA_FLAG_MMIO
)
3012 writeb(ap
->ctl
, (void __iomem
*) ap
->ioaddr
.ctl_addr
);
3014 outb(ap
->ctl
, ap
->ioaddr
.ctl_addr
);
3021 * ata_dev_same_device - Determine whether new ID matches configured device
3022 * @dev: device to compare against
3023 * @new_class: class of the new device
3024 * @new_id: IDENTIFY page of the new device
3026 * Compare @new_class and @new_id against @dev and determine
3027 * whether @dev is the device indicated by @new_class and
3034 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
3036 static int ata_dev_same_device(struct ata_device
*dev
, unsigned int new_class
,
3039 const u16
*old_id
= dev
->id
;
3040 unsigned char model
[2][41], serial
[2][21];
3043 if (dev
->class != new_class
) {
3044 ata_dev_printk(dev
, KERN_INFO
, "class mismatch %d != %d\n",
3045 dev
->class, new_class
);
3049 ata_id_c_string(old_id
, model
[0], ATA_ID_PROD_OFS
, sizeof(model
[0]));
3050 ata_id_c_string(new_id
, model
[1], ATA_ID_PROD_OFS
, sizeof(model
[1]));
3051 ata_id_c_string(old_id
, serial
[0], ATA_ID_SERNO_OFS
, sizeof(serial
[0]));
3052 ata_id_c_string(new_id
, serial
[1], ATA_ID_SERNO_OFS
, sizeof(serial
[1]));
3053 new_n_sectors
= ata_id_n_sectors(new_id
);
3055 if (strcmp(model
[0], model
[1])) {
3056 ata_dev_printk(dev
, KERN_INFO
, "model number mismatch "
3057 "'%s' != '%s'\n", model
[0], model
[1]);
3061 if (strcmp(serial
[0], serial
[1])) {
3062 ata_dev_printk(dev
, KERN_INFO
, "serial number mismatch "
3063 "'%s' != '%s'\n", serial
[0], serial
[1]);
3067 if (dev
->class == ATA_DEV_ATA
&& dev
->n_sectors
!= new_n_sectors
) {
3068 ata_dev_printk(dev
, KERN_INFO
, "n_sectors mismatch "
3070 (unsigned long long)dev
->n_sectors
,
3071 (unsigned long long)new_n_sectors
);
3079 * ata_dev_revalidate - Revalidate ATA device
3080 * @dev: device to revalidate
3081 * @readid_flags: read ID flags
3083 * Re-read IDENTIFY page and make sure @dev is still attached to
3087 * Kernel thread context (may sleep)
3090 * 0 on success, negative errno otherwise
3092 int ata_dev_revalidate(struct ata_device
*dev
, unsigned int readid_flags
)
3094 unsigned int class = dev
->class;
3095 u16
*id
= (void *)dev
->ap
->sector_buf
;
3098 if (!ata_dev_enabled(dev
)) {
3104 rc
= ata_dev_read_id(dev
, &class, readid_flags
, id
);
3108 /* is the device still there? */
3109 if (!ata_dev_same_device(dev
, class, id
)) {
3114 memcpy(dev
->id
, id
, sizeof(id
[0]) * ATA_ID_WORDS
);
3116 /* configure device according to the new ID */
3117 rc
= ata_dev_configure(dev
);
3122 ata_dev_printk(dev
, KERN_ERR
, "revalidation failed (errno=%d)\n", rc
);
3126 struct ata_blacklist_entry
{
3127 const char *model_num
;
3128 const char *model_rev
;
3129 unsigned long horkage
;
3132 static const struct ata_blacklist_entry ata_device_blacklist
[] = {
3133 /* Devices with DMA related problems under Linux */
3134 { "WDC AC11000H", NULL
, ATA_HORKAGE_NODMA
},
3135 { "WDC AC22100H", NULL
, ATA_HORKAGE_NODMA
},
3136 { "WDC AC32500H", NULL
, ATA_HORKAGE_NODMA
},
3137 { "WDC AC33100H", NULL
, ATA_HORKAGE_NODMA
},
3138 { "WDC AC31600H", NULL
, ATA_HORKAGE_NODMA
},
3139 { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA
},
3140 { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA
},
3141 { "Compaq CRD-8241B", NULL
, ATA_HORKAGE_NODMA
},
3142 { "CRD-8400B", NULL
, ATA_HORKAGE_NODMA
},
3143 { "CRD-8480B", NULL
, ATA_HORKAGE_NODMA
},
3144 { "CRD-8482B", NULL
, ATA_HORKAGE_NODMA
},
3145 { "CRD-84", NULL
, ATA_HORKAGE_NODMA
},
3146 { "SanDisk SDP3B", NULL
, ATA_HORKAGE_NODMA
},
3147 { "SanDisk SDP3B-64", NULL
, ATA_HORKAGE_NODMA
},
3148 { "SANYO CD-ROM CRD", NULL
, ATA_HORKAGE_NODMA
},
3149 { "HITACHI CDR-8", NULL
, ATA_HORKAGE_NODMA
},
3150 { "HITACHI CDR-8335", NULL
, ATA_HORKAGE_NODMA
},
3151 { "HITACHI CDR-8435", NULL
, ATA_HORKAGE_NODMA
},
3152 { "Toshiba CD-ROM XM-6202B", NULL
, ATA_HORKAGE_NODMA
},
3153 { "TOSHIBA CD-ROM XM-1702BC", NULL
, ATA_HORKAGE_NODMA
},
3154 { "CD-532E-A", NULL
, ATA_HORKAGE_NODMA
},
3155 { "E-IDE CD-ROM CR-840",NULL
, ATA_HORKAGE_NODMA
},
3156 { "CD-ROM Drive/F5A", NULL
, ATA_HORKAGE_NODMA
},
3157 { "WPI CDD-820", NULL
, ATA_HORKAGE_NODMA
},
3158 { "SAMSUNG CD-ROM SC-148C", NULL
, ATA_HORKAGE_NODMA
},
3159 { "SAMSUNG CD-ROM SC", NULL
, ATA_HORKAGE_NODMA
},
3160 { "SanDisk SDP3B-64", NULL
, ATA_HORKAGE_NODMA
},
3161 { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL
,ATA_HORKAGE_NODMA
},
3162 { "_NEC DV5800A", NULL
, ATA_HORKAGE_NODMA
},
3163 { "SAMSUNG CD-ROM SN-124","N001", ATA_HORKAGE_NODMA
},
3165 /* Devices we expect to fail diagnostics */
3167 /* Devices where NCQ should be avoided */
3169 { "WDC WD740ADFD-00", NULL
, ATA_HORKAGE_NONCQ
},
3171 /* Devices with NCQ limits */
3177 static int ata_strim(char *s
, size_t len
)
3179 len
= strnlen(s
, len
);
3181 /* ATAPI specifies that empty space is blank-filled; remove blanks */
3182 while ((len
> 0) && (s
[len
- 1] == ' ')) {
3189 unsigned long ata_device_blacklisted(const struct ata_device
*dev
)
3191 unsigned char model_num
[40];
3192 unsigned char model_rev
[16];
3193 unsigned int nlen
, rlen
;
3194 const struct ata_blacklist_entry
*ad
= ata_device_blacklist
;
3196 ata_id_string(dev
->id
, model_num
, ATA_ID_PROD_OFS
,
3198 ata_id_string(dev
->id
, model_rev
, ATA_ID_FW_REV_OFS
,
3200 nlen
= ata_strim(model_num
, sizeof(model_num
));
3201 rlen
= ata_strim(model_rev
, sizeof(model_rev
));
3203 while (ad
->model_num
) {
3204 if (!strncmp(ad
->model_num
, model_num
, nlen
)) {
3205 if (ad
->model_rev
== NULL
)
3207 if (!strncmp(ad
->model_rev
, model_rev
, rlen
))
3215 static int ata_dma_blacklisted(const struct ata_device
*dev
)
3217 /* We don't support polling DMA.
3218 * DMA blacklist those ATAPI devices with CDB-intr (and use PIO)
3219 * if the LLDD handles only interrupts in the HSM_ST_LAST state.
3221 if ((dev
->ap
->flags
& ATA_FLAG_PIO_POLLING
) &&
3222 (dev
->flags
& ATA_DFLAG_CDB_INTR
))
3224 return (ata_device_blacklisted(dev
) & ATA_HORKAGE_NODMA
) ? 1 : 0;
3228 * ata_dev_xfermask - Compute supported xfermask of the given device
3229 * @dev: Device to compute xfermask for
3231 * Compute supported xfermask of @dev and store it in
3232 * dev->*_mask. This function is responsible for applying all
3233 * known limits including host controller limits, device
3239 static void ata_dev_xfermask(struct ata_device
*dev
)
3241 struct ata_port
*ap
= dev
->ap
;
3242 struct ata_host
*host
= ap
->host
;
3243 unsigned long xfer_mask
;
3245 /* controller modes available */
3246 xfer_mask
= ata_pack_xfermask(ap
->pio_mask
,
3247 ap
->mwdma_mask
, ap
->udma_mask
);
3249 /* Apply cable rule here. Don't apply it early because when
3250 * we handle hot plug the cable type can itself change.
3252 if (ap
->cbl
== ATA_CBL_PATA40
)
3253 xfer_mask
&= ~(0xF8 << ATA_SHIFT_UDMA
);
3254 /* Apply drive side cable rule. Unknown or 80 pin cables reported
3255 * host side are checked drive side as well. Cases where we know a
3256 * 40wire cable is used safely for 80 are not checked here.
3258 if (ata_drive_40wire(dev
->id
) && (ap
->cbl
== ATA_CBL_PATA_UNK
|| ap
->cbl
== ATA_CBL_PATA80
))
3259 xfer_mask
&= ~(0xF8 << ATA_SHIFT_UDMA
);
3262 xfer_mask
&= ata_pack_xfermask(dev
->pio_mask
,
3263 dev
->mwdma_mask
, dev
->udma_mask
);
3264 xfer_mask
&= ata_id_xfermask(dev
->id
);
3267 * CFA Advanced TrueIDE timings are not allowed on a shared
3270 if (ata_dev_pair(dev
)) {
3271 /* No PIO5 or PIO6 */
3272 xfer_mask
&= ~(0x03 << (ATA_SHIFT_PIO
+ 5));
3273 /* No MWDMA3 or MWDMA 4 */
3274 xfer_mask
&= ~(0x03 << (ATA_SHIFT_MWDMA
+ 3));
3277 if (ata_dma_blacklisted(dev
)) {
3278 xfer_mask
&= ~(ATA_MASK_MWDMA
| ATA_MASK_UDMA
);
3279 ata_dev_printk(dev
, KERN_WARNING
,
3280 "device is on DMA blacklist, disabling DMA\n");
3283 if ((host
->flags
& ATA_HOST_SIMPLEX
) && host
->simplex_claimed
) {
3284 xfer_mask
&= ~(ATA_MASK_MWDMA
| ATA_MASK_UDMA
);
3285 ata_dev_printk(dev
, KERN_WARNING
, "simplex DMA is claimed by "
3286 "other device, disabling DMA\n");
3289 if (ap
->ops
->mode_filter
)
3290 xfer_mask
= ap
->ops
->mode_filter(ap
, dev
, xfer_mask
);
3292 ata_unpack_xfermask(xfer_mask
, &dev
->pio_mask
,
3293 &dev
->mwdma_mask
, &dev
->udma_mask
);
3297 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
3298 * @dev: Device to which command will be sent
3300 * Issue SET FEATURES - XFER MODE command to device @dev
3304 * PCI/etc. bus probe sem.
3307 * 0 on success, AC_ERR_* mask otherwise.
3310 static unsigned int ata_dev_set_xfermode(struct ata_device
*dev
)
3312 struct ata_taskfile tf
;
3313 unsigned int err_mask
;
3315 /* set up set-features taskfile */
3316 DPRINTK("set features - xfer mode\n");
3318 ata_tf_init(dev
, &tf
);
3319 tf
.command
= ATA_CMD_SET_FEATURES
;
3320 tf
.feature
= SETFEATURES_XFER
;
3321 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
3322 tf
.protocol
= ATA_PROT_NODATA
;
3323 tf
.nsect
= dev
->xfer_mode
;
3325 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0);
3327 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
3332 * ata_dev_init_params - Issue INIT DEV PARAMS command
3333 * @dev: Device to which command will be sent
3334 * @heads: Number of heads (taskfile parameter)
3335 * @sectors: Number of sectors (taskfile parameter)
3338 * Kernel thread context (may sleep)
3341 * 0 on success, AC_ERR_* mask otherwise.
3343 static unsigned int ata_dev_init_params(struct ata_device
*dev
,
3344 u16 heads
, u16 sectors
)
3346 struct ata_taskfile tf
;
3347 unsigned int err_mask
;
3349 /* Number of sectors per track 1-255. Number of heads 1-16 */
3350 if (sectors
< 1 || sectors
> 255 || heads
< 1 || heads
> 16)
3351 return AC_ERR_INVALID
;
3353 /* set up init dev params taskfile */
3354 DPRINTK("init dev params \n");
3356 ata_tf_init(dev
, &tf
);
3357 tf
.command
= ATA_CMD_INIT_DEV_PARAMS
;
3358 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
3359 tf
.protocol
= ATA_PROT_NODATA
;
3361 tf
.device
|= (heads
- 1) & 0x0f; /* max head = num. of heads - 1 */
3363 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0);
3365 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
3370 * ata_sg_clean - Unmap DMA memory associated with command
3371 * @qc: Command containing DMA memory to be released
3373 * Unmap all mapped DMA memory associated with this command.
3376 * spin_lock_irqsave(host lock)
3379 static void ata_sg_clean(struct ata_queued_cmd
*qc
)
3381 struct ata_port
*ap
= qc
->ap
;
3382 struct scatterlist
*sg
= qc
->__sg
;
3383 int dir
= qc
->dma_dir
;
3384 void *pad_buf
= NULL
;
3386 WARN_ON(!(qc
->flags
& ATA_QCFLAG_DMAMAP
));
3387 WARN_ON(sg
== NULL
);
3389 if (qc
->flags
& ATA_QCFLAG_SINGLE
)
3390 WARN_ON(qc
->n_elem
> 1);
3392 VPRINTK("unmapping %u sg elements\n", qc
->n_elem
);
3394 /* if we padded the buffer out to 32-bit bound, and data
3395 * xfer direction is from-device, we must copy from the
3396 * pad buffer back into the supplied buffer
3398 if (qc
->pad_len
&& !(qc
->tf
.flags
& ATA_TFLAG_WRITE
))
3399 pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
3401 if (qc
->flags
& ATA_QCFLAG_SG
) {
3403 dma_unmap_sg(ap
->dev
, sg
, qc
->n_elem
, dir
);
3404 /* restore last sg */
3405 sg
[qc
->orig_n_elem
- 1].length
+= qc
->pad_len
;
3407 struct scatterlist
*psg
= &qc
->pad_sgent
;
3408 void *addr
= kmap_atomic(psg
->page
, KM_IRQ0
);
3409 memcpy(addr
+ psg
->offset
, pad_buf
, qc
->pad_len
);
3410 kunmap_atomic(addr
, KM_IRQ0
);
3414 dma_unmap_single(ap
->dev
,
3415 sg_dma_address(&sg
[0]), sg_dma_len(&sg
[0]),
3418 sg
->length
+= qc
->pad_len
;
3420 memcpy(qc
->buf_virt
+ sg
->length
- qc
->pad_len
,
3421 pad_buf
, qc
->pad_len
);
3424 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
3429 * ata_fill_sg - Fill PCI IDE PRD table
3430 * @qc: Metadata associated with taskfile to be transferred
3432 * Fill PCI IDE PRD (scatter-gather) table with segments
3433 * associated with the current disk command.
3436 * spin_lock_irqsave(host lock)
3439 static void ata_fill_sg(struct ata_queued_cmd
*qc
)
3441 struct ata_port
*ap
= qc
->ap
;
3442 struct scatterlist
*sg
;
3445 WARN_ON(qc
->__sg
== NULL
);
3446 WARN_ON(qc
->n_elem
== 0 && qc
->pad_len
== 0);
3449 ata_for_each_sg(sg
, qc
) {
3453 /* determine if physical DMA addr spans 64K boundary.
3454 * Note h/w doesn't support 64-bit, so we unconditionally
3455 * truncate dma_addr_t to u32.
3457 addr
= (u32
) sg_dma_address(sg
);
3458 sg_len
= sg_dma_len(sg
);
3461 offset
= addr
& 0xffff;
3463 if ((offset
+ sg_len
) > 0x10000)
3464 len
= 0x10000 - offset
;
3466 ap
->prd
[idx
].addr
= cpu_to_le32(addr
);
3467 ap
->prd
[idx
].flags_len
= cpu_to_le32(len
& 0xffff);
3468 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx
, addr
, len
);
3477 ap
->prd
[idx
- 1].flags_len
|= cpu_to_le32(ATA_PRD_EOT
);
3480 * ata_check_atapi_dma - Check whether ATAPI DMA can be supported
3481 * @qc: Metadata associated with taskfile to check
3483 * Allow low-level driver to filter ATA PACKET commands, returning
3484 * a status indicating whether or not it is OK to use DMA for the
3485 * supplied PACKET command.
3488 * spin_lock_irqsave(host lock)
3490 * RETURNS: 0 when ATAPI DMA can be used
3493 int ata_check_atapi_dma(struct ata_queued_cmd
*qc
)
3495 struct ata_port
*ap
= qc
->ap
;
3496 int rc
= 0; /* Assume ATAPI DMA is OK by default */
3498 if (ap
->ops
->check_atapi_dma
)
3499 rc
= ap
->ops
->check_atapi_dma(qc
);
3504 * ata_qc_prep - Prepare taskfile for submission
3505 * @qc: Metadata associated with taskfile to be prepared
3507 * Prepare ATA taskfile for submission.
3510 * spin_lock_irqsave(host lock)
3512 void ata_qc_prep(struct ata_queued_cmd
*qc
)
3514 if (!(qc
->flags
& ATA_QCFLAG_DMAMAP
))
3520 void ata_noop_qc_prep(struct ata_queued_cmd
*qc
) { }
3523 * ata_sg_init_one - Associate command with memory buffer
3524 * @qc: Command to be associated
3525 * @buf: Memory buffer
3526 * @buflen: Length of memory buffer, in bytes.
3528 * Initialize the data-related elements of queued_cmd @qc
3529 * to point to a single memory buffer, @buf of byte length @buflen.
3532 * spin_lock_irqsave(host lock)
3535 void ata_sg_init_one(struct ata_queued_cmd
*qc
, void *buf
, unsigned int buflen
)
3537 qc
->flags
|= ATA_QCFLAG_SINGLE
;
3539 qc
->__sg
= &qc
->sgent
;
3541 qc
->orig_n_elem
= 1;
3543 qc
->nbytes
= buflen
;
3545 sg_init_one(&qc
->sgent
, buf
, buflen
);
3549 * ata_sg_init - Associate command with scatter-gather table.
3550 * @qc: Command to be associated
3551 * @sg: Scatter-gather table.
3552 * @n_elem: Number of elements in s/g table.
3554 * Initialize the data-related elements of queued_cmd @qc
3555 * to point to a scatter-gather table @sg, containing @n_elem
3559 * spin_lock_irqsave(host lock)
3562 void ata_sg_init(struct ata_queued_cmd
*qc
, struct scatterlist
*sg
,
3563 unsigned int n_elem
)
3565 qc
->flags
|= ATA_QCFLAG_SG
;
3567 qc
->n_elem
= n_elem
;
3568 qc
->orig_n_elem
= n_elem
;
3572 * ata_sg_setup_one - DMA-map the memory buffer associated with a command.
3573 * @qc: Command with memory buffer to be mapped.
3575 * DMA-map the memory buffer associated with queued_cmd @qc.
3578 * spin_lock_irqsave(host lock)
3581 * Zero on success, negative on error.
3584 static int ata_sg_setup_one(struct ata_queued_cmd
*qc
)
3586 struct ata_port
*ap
= qc
->ap
;
3587 int dir
= qc
->dma_dir
;
3588 struct scatterlist
*sg
= qc
->__sg
;
3589 dma_addr_t dma_address
;
3592 /* we must lengthen transfers to end on a 32-bit boundary */
3593 qc
->pad_len
= sg
->length
& 3;
3595 void *pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
3596 struct scatterlist
*psg
= &qc
->pad_sgent
;
3598 WARN_ON(qc
->dev
->class != ATA_DEV_ATAPI
);
3600 memset(pad_buf
, 0, ATA_DMA_PAD_SZ
);
3602 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
)
3603 memcpy(pad_buf
, qc
->buf_virt
+ sg
->length
- qc
->pad_len
,
3606 sg_dma_address(psg
) = ap
->pad_dma
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
3607 sg_dma_len(psg
) = ATA_DMA_PAD_SZ
;
3609 sg
->length
-= qc
->pad_len
;
3610 if (sg
->length
== 0)
3613 DPRINTK("padding done, sg->length=%u pad_len=%u\n",
3614 sg
->length
, qc
->pad_len
);
3622 dma_address
= dma_map_single(ap
->dev
, qc
->buf_virt
,
3624 if (dma_mapping_error(dma_address
)) {
3626 sg
->length
+= qc
->pad_len
;
3630 sg_dma_address(sg
) = dma_address
;
3631 sg_dma_len(sg
) = sg
->length
;
3634 DPRINTK("mapped buffer of %d bytes for %s\n", sg_dma_len(sg
),
3635 qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
3641 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
3642 * @qc: Command with scatter-gather table to be mapped.
3644 * DMA-map the scatter-gather table associated with queued_cmd @qc.
3647 * spin_lock_irqsave(host lock)
3650 * Zero on success, negative on error.
3654 static int ata_sg_setup(struct ata_queued_cmd
*qc
)
3656 struct ata_port
*ap
= qc
->ap
;
3657 struct scatterlist
*sg
= qc
->__sg
;
3658 struct scatterlist
*lsg
= &sg
[qc
->n_elem
- 1];
3659 int n_elem
, pre_n_elem
, dir
, trim_sg
= 0;
3661 VPRINTK("ENTER, ata%u\n", ap
->id
);
3662 WARN_ON(!(qc
->flags
& ATA_QCFLAG_SG
));
3664 /* we must lengthen transfers to end on a 32-bit boundary */
3665 qc
->pad_len
= lsg
->length
& 3;
3667 void *pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
3668 struct scatterlist
*psg
= &qc
->pad_sgent
;
3669 unsigned int offset
;
3671 WARN_ON(qc
->dev
->class != ATA_DEV_ATAPI
);
3673 memset(pad_buf
, 0, ATA_DMA_PAD_SZ
);
3676 * psg->page/offset are used to copy to-be-written
3677 * data in this function or read data in ata_sg_clean.
3679 offset
= lsg
->offset
+ lsg
->length
- qc
->pad_len
;
3680 psg
->page
= nth_page(lsg
->page
, offset
>> PAGE_SHIFT
);
3681 psg
->offset
= offset_in_page(offset
);
3683 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
) {
3684 void *addr
= kmap_atomic(psg
->page
, KM_IRQ0
);
3685 memcpy(pad_buf
, addr
+ psg
->offset
, qc
->pad_len
);
3686 kunmap_atomic(addr
, KM_IRQ0
);
3689 sg_dma_address(psg
) = ap
->pad_dma
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
3690 sg_dma_len(psg
) = ATA_DMA_PAD_SZ
;
3692 lsg
->length
-= qc
->pad_len
;
3693 if (lsg
->length
== 0)
3696 DPRINTK("padding done, sg[%d].length=%u pad_len=%u\n",
3697 qc
->n_elem
- 1, lsg
->length
, qc
->pad_len
);
3700 pre_n_elem
= qc
->n_elem
;
3701 if (trim_sg
&& pre_n_elem
)
3710 n_elem
= dma_map_sg(ap
->dev
, sg
, pre_n_elem
, dir
);
3712 /* restore last sg */
3713 lsg
->length
+= qc
->pad_len
;
3717 DPRINTK("%d sg elements mapped\n", n_elem
);
3720 qc
->n_elem
= n_elem
;
3726 * swap_buf_le16 - swap halves of 16-bit words in place
3727 * @buf: Buffer to swap
3728 * @buf_words: Number of 16-bit words in buffer.
3730 * Swap halves of 16-bit words if needed to convert from
3731 * little-endian byte order to native cpu byte order, or
3735 * Inherited from caller.
3737 void swap_buf_le16(u16
*buf
, unsigned int buf_words
)
3742 for (i
= 0; i
< buf_words
; i
++)
3743 buf
[i
] = le16_to_cpu(buf
[i
]);
3744 #endif /* __BIG_ENDIAN */
3748 * ata_mmio_data_xfer - Transfer data by MMIO
3749 * @adev: device for this I/O
3751 * @buflen: buffer length
3752 * @write_data: read/write
3754 * Transfer data from/to the device data register by MMIO.
3757 * Inherited from caller.
3760 void ata_mmio_data_xfer(struct ata_device
*adev
, unsigned char *buf
,
3761 unsigned int buflen
, int write_data
)
3763 struct ata_port
*ap
= adev
->ap
;
3765 unsigned int words
= buflen
>> 1;
3766 u16
*buf16
= (u16
*) buf
;
3767 void __iomem
*mmio
= (void __iomem
*)ap
->ioaddr
.data_addr
;
3769 /* Transfer multiple of 2 bytes */
3771 for (i
= 0; i
< words
; i
++)
3772 writew(le16_to_cpu(buf16
[i
]), mmio
);
3774 for (i
= 0; i
< words
; i
++)
3775 buf16
[i
] = cpu_to_le16(readw(mmio
));
3778 /* Transfer trailing 1 byte, if any. */
3779 if (unlikely(buflen
& 0x01)) {
3780 u16 align_buf
[1] = { 0 };
3781 unsigned char *trailing_buf
= buf
+ buflen
- 1;
3784 memcpy(align_buf
, trailing_buf
, 1);
3785 writew(le16_to_cpu(align_buf
[0]), mmio
);
3787 align_buf
[0] = cpu_to_le16(readw(mmio
));
3788 memcpy(trailing_buf
, align_buf
, 1);
3794 * ata_pio_data_xfer - Transfer data by PIO
3795 * @adev: device to target
3797 * @buflen: buffer length
3798 * @write_data: read/write
3800 * Transfer data from/to the device data register by PIO.
3803 * Inherited from caller.
3806 void ata_pio_data_xfer(struct ata_device
*adev
, unsigned char *buf
,
3807 unsigned int buflen
, int write_data
)
3809 struct ata_port
*ap
= adev
->ap
;
3810 unsigned int words
= buflen
>> 1;
3812 /* Transfer multiple of 2 bytes */
3814 outsw(ap
->ioaddr
.data_addr
, buf
, words
);
3816 insw(ap
->ioaddr
.data_addr
, buf
, words
);
3818 /* Transfer trailing 1 byte, if any. */
3819 if (unlikely(buflen
& 0x01)) {
3820 u16 align_buf
[1] = { 0 };
3821 unsigned char *trailing_buf
= buf
+ buflen
- 1;
3824 memcpy(align_buf
, trailing_buf
, 1);
3825 outw(le16_to_cpu(align_buf
[0]), ap
->ioaddr
.data_addr
);
3827 align_buf
[0] = cpu_to_le16(inw(ap
->ioaddr
.data_addr
));
3828 memcpy(trailing_buf
, align_buf
, 1);
3834 * ata_pio_data_xfer_noirq - Transfer data by PIO
3835 * @adev: device to target
3837 * @buflen: buffer length
3838 * @write_data: read/write
3840 * Transfer data from/to the device data register by PIO. Do the
3841 * transfer with interrupts disabled.
3844 * Inherited from caller.
3847 void ata_pio_data_xfer_noirq(struct ata_device
*adev
, unsigned char *buf
,
3848 unsigned int buflen
, int write_data
)
3850 unsigned long flags
;
3851 local_irq_save(flags
);
3852 ata_pio_data_xfer(adev
, buf
, buflen
, write_data
);
3853 local_irq_restore(flags
);
3858 * ata_pio_sector - Transfer ATA_SECT_SIZE (512 bytes) of data.
3859 * @qc: Command on going
3861 * Transfer ATA_SECT_SIZE of data from/to the ATA device.
3864 * Inherited from caller.
3867 static void ata_pio_sector(struct ata_queued_cmd
*qc
)
3869 int do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
);
3870 struct scatterlist
*sg
= qc
->__sg
;
3871 struct ata_port
*ap
= qc
->ap
;
3873 unsigned int offset
;
3876 if (qc
->cursect
== (qc
->nsect
- 1))
3877 ap
->hsm_task_state
= HSM_ST_LAST
;
3879 page
= sg
[qc
->cursg
].page
;
3880 offset
= sg
[qc
->cursg
].offset
+ qc
->cursg_ofs
* ATA_SECT_SIZE
;
3882 /* get the current page and offset */
3883 page
= nth_page(page
, (offset
>> PAGE_SHIFT
));
3884 offset
%= PAGE_SIZE
;
3886 DPRINTK("data %s\n", qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
3888 if (PageHighMem(page
)) {
3889 unsigned long flags
;
3891 /* FIXME: use a bounce buffer */
3892 local_irq_save(flags
);
3893 buf
= kmap_atomic(page
, KM_IRQ0
);
3895 /* do the actual data transfer */
3896 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, ATA_SECT_SIZE
, do_write
);
3898 kunmap_atomic(buf
, KM_IRQ0
);
3899 local_irq_restore(flags
);
3901 buf
= page_address(page
);
3902 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, ATA_SECT_SIZE
, do_write
);
3908 if ((qc
->cursg_ofs
* ATA_SECT_SIZE
) == (&sg
[qc
->cursg
])->length
) {
3915 * ata_pio_sectors - Transfer one or many 512-byte sectors.
3916 * @qc: Command on going
3918 * Transfer one or many ATA_SECT_SIZE of data from/to the
3919 * ATA device for the DRQ request.
3922 * Inherited from caller.
3925 static void ata_pio_sectors(struct ata_queued_cmd
*qc
)
3927 if (is_multi_taskfile(&qc
->tf
)) {
3928 /* READ/WRITE MULTIPLE */
3931 WARN_ON(qc
->dev
->multi_count
== 0);
3933 nsect
= min(qc
->nsect
- qc
->cursect
, qc
->dev
->multi_count
);
3941 * atapi_send_cdb - Write CDB bytes to hardware
3942 * @ap: Port to which ATAPI device is attached.
3943 * @qc: Taskfile currently active
3945 * When device has indicated its readiness to accept
3946 * a CDB, this function is called. Send the CDB.
3952 static void atapi_send_cdb(struct ata_port
*ap
, struct ata_queued_cmd
*qc
)
3955 DPRINTK("send cdb\n");
3956 WARN_ON(qc
->dev
->cdb_len
< 12);
3958 ap
->ops
->data_xfer(qc
->dev
, qc
->cdb
, qc
->dev
->cdb_len
, 1);
3959 ata_altstatus(ap
); /* flush */
3961 switch (qc
->tf
.protocol
) {
3962 case ATA_PROT_ATAPI
:
3963 ap
->hsm_task_state
= HSM_ST
;
3965 case ATA_PROT_ATAPI_NODATA
:
3966 ap
->hsm_task_state
= HSM_ST_LAST
;
3968 case ATA_PROT_ATAPI_DMA
:
3969 ap
->hsm_task_state
= HSM_ST_LAST
;
3970 /* initiate bmdma */
3971 ap
->ops
->bmdma_start(qc
);
3977 * __atapi_pio_bytes - Transfer data from/to the ATAPI device.
3978 * @qc: Command on going
3979 * @bytes: number of bytes
3981 * Transfer Transfer data from/to the ATAPI device.
3984 * Inherited from caller.
3988 static void __atapi_pio_bytes(struct ata_queued_cmd
*qc
, unsigned int bytes
)
3990 int do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
);
3991 struct scatterlist
*sg
= qc
->__sg
;
3992 struct ata_port
*ap
= qc
->ap
;
3995 unsigned int offset
, count
;
3997 if (qc
->curbytes
+ bytes
>= qc
->nbytes
)
3998 ap
->hsm_task_state
= HSM_ST_LAST
;
4001 if (unlikely(qc
->cursg
>= qc
->n_elem
)) {
4003 * The end of qc->sg is reached and the device expects
4004 * more data to transfer. In order not to overrun qc->sg
4005 * and fulfill length specified in the byte count register,
4006 * - for read case, discard trailing data from the device
4007 * - for write case, padding zero data to the device
4009 u16 pad_buf
[1] = { 0 };
4010 unsigned int words
= bytes
>> 1;
4013 if (words
) /* warning if bytes > 1 */
4014 ata_dev_printk(qc
->dev
, KERN_WARNING
,
4015 "%u bytes trailing data\n", bytes
);
4017 for (i
= 0; i
< words
; i
++)
4018 ap
->ops
->data_xfer(qc
->dev
, (unsigned char*)pad_buf
, 2, do_write
);
4020 ap
->hsm_task_state
= HSM_ST_LAST
;
4024 sg
= &qc
->__sg
[qc
->cursg
];
4027 offset
= sg
->offset
+ qc
->cursg_ofs
;
4029 /* get the current page and offset */
4030 page
= nth_page(page
, (offset
>> PAGE_SHIFT
));
4031 offset
%= PAGE_SIZE
;
4033 /* don't overrun current sg */
4034 count
= min(sg
->length
- qc
->cursg_ofs
, bytes
);
4036 /* don't cross page boundaries */
4037 count
= min(count
, (unsigned int)PAGE_SIZE
- offset
);
4039 DPRINTK("data %s\n", qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
4041 if (PageHighMem(page
)) {
4042 unsigned long flags
;
4044 /* FIXME: use bounce buffer */
4045 local_irq_save(flags
);
4046 buf
= kmap_atomic(page
, KM_IRQ0
);
4048 /* do the actual data transfer */
4049 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, count
, do_write
);
4051 kunmap_atomic(buf
, KM_IRQ0
);
4052 local_irq_restore(flags
);
4054 buf
= page_address(page
);
4055 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, count
, do_write
);
4059 qc
->curbytes
+= count
;
4060 qc
->cursg_ofs
+= count
;
4062 if (qc
->cursg_ofs
== sg
->length
) {
4072 * atapi_pio_bytes - Transfer data from/to the ATAPI device.
4073 * @qc: Command on going
4075 * Transfer Transfer data from/to the ATAPI device.
4078 * Inherited from caller.
4081 static void atapi_pio_bytes(struct ata_queued_cmd
*qc
)
4083 struct ata_port
*ap
= qc
->ap
;
4084 struct ata_device
*dev
= qc
->dev
;
4085 unsigned int ireason
, bc_lo
, bc_hi
, bytes
;
4086 int i_write
, do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
) ? 1 : 0;
4088 /* Abuse qc->result_tf for temp storage of intermediate TF
4089 * here to save some kernel stack usage.
4090 * For normal completion, qc->result_tf is not relevant. For
4091 * error, qc->result_tf is later overwritten by ata_qc_complete().
4092 * So, the correctness of qc->result_tf is not affected.
4094 ap
->ops
->tf_read(ap
, &qc
->result_tf
);
4095 ireason
= qc
->result_tf
.nsect
;
4096 bc_lo
= qc
->result_tf
.lbam
;
4097 bc_hi
= qc
->result_tf
.lbah
;
4098 bytes
= (bc_hi
<< 8) | bc_lo
;
4100 /* shall be cleared to zero, indicating xfer of data */
4101 if (ireason
& (1 << 0))
4104 /* make sure transfer direction matches expected */
4105 i_write
= ((ireason
& (1 << 1)) == 0) ? 1 : 0;
4106 if (do_write
!= i_write
)
4109 VPRINTK("ata%u: xfering %d bytes\n", ap
->id
, bytes
);
4111 __atapi_pio_bytes(qc
, bytes
);
4116 ata_dev_printk(dev
, KERN_INFO
, "ATAPI check failed\n");
4117 qc
->err_mask
|= AC_ERR_HSM
;
4118 ap
->hsm_task_state
= HSM_ST_ERR
;
4122 * ata_hsm_ok_in_wq - Check if the qc can be handled in the workqueue.
4123 * @ap: the target ata_port
4127 * 1 if ok in workqueue, 0 otherwise.
4130 static inline int ata_hsm_ok_in_wq(struct ata_port
*ap
, struct ata_queued_cmd
*qc
)
4132 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
4135 if (ap
->hsm_task_state
== HSM_ST_FIRST
) {
4136 if (qc
->tf
.protocol
== ATA_PROT_PIO
&&
4137 (qc
->tf
.flags
& ATA_TFLAG_WRITE
))
4140 if (is_atapi_taskfile(&qc
->tf
) &&
4141 !(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
))
4149 * ata_hsm_qc_complete - finish a qc running on standard HSM
4150 * @qc: Command to complete
4151 * @in_wq: 1 if called from workqueue, 0 otherwise
4153 * Finish @qc which is running on standard HSM.
4156 * If @in_wq is zero, spin_lock_irqsave(host lock).
4157 * Otherwise, none on entry and grabs host lock.
4159 static void ata_hsm_qc_complete(struct ata_queued_cmd
*qc
, int in_wq
)
4161 struct ata_port
*ap
= qc
->ap
;
4162 unsigned long flags
;
4164 if (ap
->ops
->error_handler
) {
4166 spin_lock_irqsave(ap
->lock
, flags
);
4168 /* EH might have kicked in while host lock is
4171 qc
= ata_qc_from_tag(ap
, qc
->tag
);
4173 if (likely(!(qc
->err_mask
& AC_ERR_HSM
))) {
4175 ata_qc_complete(qc
);
4177 ata_port_freeze(ap
);
4180 spin_unlock_irqrestore(ap
->lock
, flags
);
4182 if (likely(!(qc
->err_mask
& AC_ERR_HSM
)))
4183 ata_qc_complete(qc
);
4185 ata_port_freeze(ap
);
4189 spin_lock_irqsave(ap
->lock
, flags
);
4191 ata_qc_complete(qc
);
4192 spin_unlock_irqrestore(ap
->lock
, flags
);
4194 ata_qc_complete(qc
);
4197 ata_altstatus(ap
); /* flush */
4201 * ata_hsm_move - move the HSM to the next state.
4202 * @ap: the target ata_port
4204 * @status: current device status
4205 * @in_wq: 1 if called from workqueue, 0 otherwise
4208 * 1 when poll next status needed, 0 otherwise.
4210 int ata_hsm_move(struct ata_port
*ap
, struct ata_queued_cmd
*qc
,
4211 u8 status
, int in_wq
)
4213 unsigned long flags
= 0;
4216 WARN_ON((qc
->flags
& ATA_QCFLAG_ACTIVE
) == 0);
4218 /* Make sure ata_qc_issue_prot() does not throw things
4219 * like DMA polling into the workqueue. Notice that
4220 * in_wq is not equivalent to (qc->tf.flags & ATA_TFLAG_POLLING).
4222 WARN_ON(in_wq
!= ata_hsm_ok_in_wq(ap
, qc
));
4225 DPRINTK("ata%u: protocol %d task_state %d (dev_stat 0x%X)\n",
4226 ap
->id
, qc
->tf
.protocol
, ap
->hsm_task_state
, status
);
4228 switch (ap
->hsm_task_state
) {
4230 /* Send first data block or PACKET CDB */
4232 /* If polling, we will stay in the work queue after
4233 * sending the data. Otherwise, interrupt handler
4234 * takes over after sending the data.
4236 poll_next
= (qc
->tf
.flags
& ATA_TFLAG_POLLING
);
4238 /* check device status */
4239 if (unlikely((status
& ATA_DRQ
) == 0)) {
4240 /* handle BSY=0, DRQ=0 as error */
4241 if (likely(status
& (ATA_ERR
| ATA_DF
)))
4242 /* device stops HSM for abort/error */
4243 qc
->err_mask
|= AC_ERR_DEV
;
4245 /* HSM violation. Let EH handle this */
4246 qc
->err_mask
|= AC_ERR_HSM
;
4248 ap
->hsm_task_state
= HSM_ST_ERR
;
4252 /* Device should not ask for data transfer (DRQ=1)
4253 * when it finds something wrong.
4254 * We ignore DRQ here and stop the HSM by
4255 * changing hsm_task_state to HSM_ST_ERR and
4256 * let the EH abort the command or reset the device.
4258 if (unlikely(status
& (ATA_ERR
| ATA_DF
))) {
4259 printk(KERN_WARNING
"ata%d: DRQ=1 with device error, dev_stat 0x%X\n",
4261 qc
->err_mask
|= AC_ERR_HSM
;
4262 ap
->hsm_task_state
= HSM_ST_ERR
;
4266 /* Send the CDB (atapi) or the first data block (ata pio out).
4267 * During the state transition, interrupt handler shouldn't
4268 * be invoked before the data transfer is complete and
4269 * hsm_task_state is changed. Hence, the following locking.
4272 spin_lock_irqsave(ap
->lock
, flags
);
4274 if (qc
->tf
.protocol
== ATA_PROT_PIO
) {
4275 /* PIO data out protocol.
4276 * send first data block.
4279 /* ata_pio_sectors() might change the state
4280 * to HSM_ST_LAST. so, the state is changed here
4281 * before ata_pio_sectors().
4283 ap
->hsm_task_state
= HSM_ST
;
4284 ata_pio_sectors(qc
);
4285 ata_altstatus(ap
); /* flush */
4288 atapi_send_cdb(ap
, qc
);
4291 spin_unlock_irqrestore(ap
->lock
, flags
);
4293 /* if polling, ata_pio_task() handles the rest.
4294 * otherwise, interrupt handler takes over from here.
4299 /* complete command or read/write the data register */
4300 if (qc
->tf
.protocol
== ATA_PROT_ATAPI
) {
4301 /* ATAPI PIO protocol */
4302 if ((status
& ATA_DRQ
) == 0) {
4303 /* No more data to transfer or device error.
4304 * Device error will be tagged in HSM_ST_LAST.
4306 ap
->hsm_task_state
= HSM_ST_LAST
;
4310 /* Device should not ask for data transfer (DRQ=1)
4311 * when it finds something wrong.
4312 * We ignore DRQ here and stop the HSM by
4313 * changing hsm_task_state to HSM_ST_ERR and
4314 * let the EH abort the command or reset the device.
4316 if (unlikely(status
& (ATA_ERR
| ATA_DF
))) {
4317 printk(KERN_WARNING
"ata%d: DRQ=1 with device error, dev_stat 0x%X\n",
4319 qc
->err_mask
|= AC_ERR_HSM
;
4320 ap
->hsm_task_state
= HSM_ST_ERR
;
4324 atapi_pio_bytes(qc
);
4326 if (unlikely(ap
->hsm_task_state
== HSM_ST_ERR
))
4327 /* bad ireason reported by device */
4331 /* ATA PIO protocol */
4332 if (unlikely((status
& ATA_DRQ
) == 0)) {
4333 /* handle BSY=0, DRQ=0 as error */
4334 if (likely(status
& (ATA_ERR
| ATA_DF
)))
4335 /* device stops HSM for abort/error */
4336 qc
->err_mask
|= AC_ERR_DEV
;
4338 /* HSM violation. Let EH handle this.
4339 * Phantom devices also trigger this
4340 * condition. Mark hint.
4342 qc
->err_mask
|= AC_ERR_HSM
|
4345 ap
->hsm_task_state
= HSM_ST_ERR
;
4349 /* For PIO reads, some devices may ask for
4350 * data transfer (DRQ=1) alone with ERR=1.
4351 * We respect DRQ here and transfer one
4352 * block of junk data before changing the
4353 * hsm_task_state to HSM_ST_ERR.
4355 * For PIO writes, ERR=1 DRQ=1 doesn't make
4356 * sense since the data block has been
4357 * transferred to the device.
4359 if (unlikely(status
& (ATA_ERR
| ATA_DF
))) {
4360 /* data might be corrputed */
4361 qc
->err_mask
|= AC_ERR_DEV
;
4363 if (!(qc
->tf
.flags
& ATA_TFLAG_WRITE
)) {
4364 ata_pio_sectors(qc
);
4366 status
= ata_wait_idle(ap
);
4369 if (status
& (ATA_BUSY
| ATA_DRQ
))
4370 qc
->err_mask
|= AC_ERR_HSM
;
4372 /* ata_pio_sectors() might change the
4373 * state to HSM_ST_LAST. so, the state
4374 * is changed after ata_pio_sectors().
4376 ap
->hsm_task_state
= HSM_ST_ERR
;
4380 ata_pio_sectors(qc
);
4382 if (ap
->hsm_task_state
== HSM_ST_LAST
&&
4383 (!(qc
->tf
.flags
& ATA_TFLAG_WRITE
))) {
4386 status
= ata_wait_idle(ap
);
4391 ata_altstatus(ap
); /* flush */
4396 if (unlikely(!ata_ok(status
))) {
4397 qc
->err_mask
|= __ac_err_mask(status
);
4398 ap
->hsm_task_state
= HSM_ST_ERR
;
4402 /* no more data to transfer */
4403 DPRINTK("ata%u: dev %u command complete, drv_stat 0x%x\n",
4404 ap
->id
, qc
->dev
->devno
, status
);
4406 WARN_ON(qc
->err_mask
);
4408 ap
->hsm_task_state
= HSM_ST_IDLE
;
4410 /* complete taskfile transaction */
4411 ata_hsm_qc_complete(qc
, in_wq
);
4417 /* make sure qc->err_mask is available to
4418 * know what's wrong and recover
4420 WARN_ON(qc
->err_mask
== 0);
4422 ap
->hsm_task_state
= HSM_ST_IDLE
;
4424 /* complete taskfile transaction */
4425 ata_hsm_qc_complete(qc
, in_wq
);
4437 static void ata_pio_task(void *_data
)
4439 struct ata_queued_cmd
*qc
= _data
;
4440 struct ata_port
*ap
= qc
->ap
;
4445 WARN_ON(ap
->hsm_task_state
== HSM_ST_IDLE
);
4448 * This is purely heuristic. This is a fast path.
4449 * Sometimes when we enter, BSY will be cleared in
4450 * a chk-status or two. If not, the drive is probably seeking
4451 * or something. Snooze for a couple msecs, then
4452 * chk-status again. If still busy, queue delayed work.
4454 status
= ata_busy_wait(ap
, ATA_BUSY
, 5);
4455 if (status
& ATA_BUSY
) {
4457 status
= ata_busy_wait(ap
, ATA_BUSY
, 10);
4458 if (status
& ATA_BUSY
) {
4459 ata_port_queue_task(ap
, ata_pio_task
, qc
, ATA_SHORT_PAUSE
);
4465 poll_next
= ata_hsm_move(ap
, qc
, status
, 1);
4467 /* another command or interrupt handler
4468 * may be running at this point.
4475 * ata_qc_new - Request an available ATA command, for queueing
4476 * @ap: Port associated with device @dev
4477 * @dev: Device from whom we request an available command structure
4483 static struct ata_queued_cmd
*ata_qc_new(struct ata_port
*ap
)
4485 struct ata_queued_cmd
*qc
= NULL
;
4488 /* no command while frozen */
4489 if (unlikely(ap
->pflags
& ATA_PFLAG_FROZEN
))
4492 /* the last tag is reserved for internal command. */
4493 for (i
= 0; i
< ATA_MAX_QUEUE
- 1; i
++)
4494 if (!test_and_set_bit(i
, &ap
->qc_allocated
)) {
4495 qc
= __ata_qc_from_tag(ap
, i
);
4506 * ata_qc_new_init - Request an available ATA command, and initialize it
4507 * @dev: Device from whom we request an available command structure
4513 struct ata_queued_cmd
*ata_qc_new_init(struct ata_device
*dev
)
4515 struct ata_port
*ap
= dev
->ap
;
4516 struct ata_queued_cmd
*qc
;
4518 qc
= ata_qc_new(ap
);
4531 * ata_qc_free - free unused ata_queued_cmd
4532 * @qc: Command to complete
4534 * Designed to free unused ata_queued_cmd object
4535 * in case something prevents using it.
4538 * spin_lock_irqsave(host lock)
4540 void ata_qc_free(struct ata_queued_cmd
*qc
)
4542 struct ata_port
*ap
= qc
->ap
;
4545 WARN_ON(qc
== NULL
); /* ata_qc_from_tag _might_ return NULL */
4549 if (likely(ata_tag_valid(tag
))) {
4550 qc
->tag
= ATA_TAG_POISON
;
4551 clear_bit(tag
, &ap
->qc_allocated
);
4555 void __ata_qc_complete(struct ata_queued_cmd
*qc
)
4557 struct ata_port
*ap
= qc
->ap
;
4559 WARN_ON(qc
== NULL
); /* ata_qc_from_tag _might_ return NULL */
4560 WARN_ON(!(qc
->flags
& ATA_QCFLAG_ACTIVE
));
4562 if (likely(qc
->flags
& ATA_QCFLAG_DMAMAP
))
4565 /* command should be marked inactive atomically with qc completion */
4566 if (qc
->tf
.protocol
== ATA_PROT_NCQ
)
4567 ap
->sactive
&= ~(1 << qc
->tag
);
4569 ap
->active_tag
= ATA_TAG_POISON
;
4571 /* atapi: mark qc as inactive to prevent the interrupt handler
4572 * from completing the command twice later, before the error handler
4573 * is called. (when rc != 0 and atapi request sense is needed)
4575 qc
->flags
&= ~ATA_QCFLAG_ACTIVE
;
4576 ap
->qc_active
&= ~(1 << qc
->tag
);
4578 /* call completion callback */
4579 qc
->complete_fn(qc
);
4582 static void fill_result_tf(struct ata_queued_cmd
*qc
)
4584 struct ata_port
*ap
= qc
->ap
;
4586 ap
->ops
->tf_read(ap
, &qc
->result_tf
);
4587 qc
->result_tf
.flags
= qc
->tf
.flags
;
4591 * ata_qc_complete - Complete an active ATA command
4592 * @qc: Command to complete
4593 * @err_mask: ATA Status register contents
4595 * Indicate to the mid and upper layers that an ATA
4596 * command has completed, with either an ok or not-ok status.
4599 * spin_lock_irqsave(host lock)
4601 void ata_qc_complete(struct ata_queued_cmd
*qc
)
4603 struct ata_port
*ap
= qc
->ap
;
4605 /* XXX: New EH and old EH use different mechanisms to
4606 * synchronize EH with regular execution path.
4608 * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED.
4609 * Normal execution path is responsible for not accessing a
4610 * failed qc. libata core enforces the rule by returning NULL
4611 * from ata_qc_from_tag() for failed qcs.
4613 * Old EH depends on ata_qc_complete() nullifying completion
4614 * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does
4615 * not synchronize with interrupt handler. Only PIO task is
4618 if (ap
->ops
->error_handler
) {
4619 WARN_ON(ap
->pflags
& ATA_PFLAG_FROZEN
);
4621 if (unlikely(qc
->err_mask
))
4622 qc
->flags
|= ATA_QCFLAG_FAILED
;
4624 if (unlikely(qc
->flags
& ATA_QCFLAG_FAILED
)) {
4625 if (!ata_tag_internal(qc
->tag
)) {
4626 /* always fill result TF for failed qc */
4628 ata_qc_schedule_eh(qc
);
4633 /* read result TF if requested */
4634 if (qc
->flags
& ATA_QCFLAG_RESULT_TF
)
4637 __ata_qc_complete(qc
);
4639 if (qc
->flags
& ATA_QCFLAG_EH_SCHEDULED
)
4642 /* read result TF if failed or requested */
4643 if (qc
->err_mask
|| qc
->flags
& ATA_QCFLAG_RESULT_TF
)
4646 __ata_qc_complete(qc
);
4651 * ata_qc_complete_multiple - Complete multiple qcs successfully
4652 * @ap: port in question
4653 * @qc_active: new qc_active mask
4654 * @finish_qc: LLDD callback invoked before completing a qc
4656 * Complete in-flight commands. This functions is meant to be
4657 * called from low-level driver's interrupt routine to complete
4658 * requests normally. ap->qc_active and @qc_active is compared
4659 * and commands are completed accordingly.
4662 * spin_lock_irqsave(host lock)
4665 * Number of completed commands on success, -errno otherwise.
4667 int ata_qc_complete_multiple(struct ata_port
*ap
, u32 qc_active
,
4668 void (*finish_qc
)(struct ata_queued_cmd
*))
4674 done_mask
= ap
->qc_active
^ qc_active
;
4676 if (unlikely(done_mask
& qc_active
)) {
4677 ata_port_printk(ap
, KERN_ERR
, "illegal qc_active transition "
4678 "(%08x->%08x)\n", ap
->qc_active
, qc_active
);
4682 for (i
= 0; i
< ATA_MAX_QUEUE
; i
++) {
4683 struct ata_queued_cmd
*qc
;
4685 if (!(done_mask
& (1 << i
)))
4688 if ((qc
= ata_qc_from_tag(ap
, i
))) {
4691 ata_qc_complete(qc
);
4699 static inline int ata_should_dma_map(struct ata_queued_cmd
*qc
)
4701 struct ata_port
*ap
= qc
->ap
;
4703 switch (qc
->tf
.protocol
) {
4706 case ATA_PROT_ATAPI_DMA
:
4709 case ATA_PROT_ATAPI
:
4711 if (ap
->flags
& ATA_FLAG_PIO_DMA
)
4724 * ata_qc_issue - issue taskfile to device
4725 * @qc: command to issue to device
4727 * Prepare an ATA command to submission to device.
4728 * This includes mapping the data into a DMA-able
4729 * area, filling in the S/G table, and finally
4730 * writing the taskfile to hardware, starting the command.
4733 * spin_lock_irqsave(host lock)
4735 void ata_qc_issue(struct ata_queued_cmd
*qc
)
4737 struct ata_port
*ap
= qc
->ap
;
4739 /* Make sure only one non-NCQ command is outstanding. The
4740 * check is skipped for old EH because it reuses active qc to
4741 * request ATAPI sense.
4743 WARN_ON(ap
->ops
->error_handler
&& ata_tag_valid(ap
->active_tag
));
4745 if (qc
->tf
.protocol
== ATA_PROT_NCQ
) {
4746 WARN_ON(ap
->sactive
& (1 << qc
->tag
));
4747 ap
->sactive
|= 1 << qc
->tag
;
4749 WARN_ON(ap
->sactive
);
4750 ap
->active_tag
= qc
->tag
;
4753 qc
->flags
|= ATA_QCFLAG_ACTIVE
;
4754 ap
->qc_active
|= 1 << qc
->tag
;
4756 if (ata_should_dma_map(qc
)) {
4757 if (qc
->flags
& ATA_QCFLAG_SG
) {
4758 if (ata_sg_setup(qc
))
4760 } else if (qc
->flags
& ATA_QCFLAG_SINGLE
) {
4761 if (ata_sg_setup_one(qc
))
4765 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
4768 ap
->ops
->qc_prep(qc
);
4770 qc
->err_mask
|= ap
->ops
->qc_issue(qc
);
4771 if (unlikely(qc
->err_mask
))
4776 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
4777 qc
->err_mask
|= AC_ERR_SYSTEM
;
4779 ata_qc_complete(qc
);
4783 * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner
4784 * @qc: command to issue to device
4786 * Using various libata functions and hooks, this function
4787 * starts an ATA command. ATA commands are grouped into
4788 * classes called "protocols", and issuing each type of protocol
4789 * is slightly different.
4791 * May be used as the qc_issue() entry in ata_port_operations.
4794 * spin_lock_irqsave(host lock)
4797 * Zero on success, AC_ERR_* mask on failure
4800 unsigned int ata_qc_issue_prot(struct ata_queued_cmd
*qc
)
4802 struct ata_port
*ap
= qc
->ap
;
4804 /* Use polling pio if the LLD doesn't handle
4805 * interrupt driven pio and atapi CDB interrupt.
4807 if (ap
->flags
& ATA_FLAG_PIO_POLLING
) {
4808 switch (qc
->tf
.protocol
) {
4810 case ATA_PROT_ATAPI
:
4811 case ATA_PROT_ATAPI_NODATA
:
4812 qc
->tf
.flags
|= ATA_TFLAG_POLLING
;
4814 case ATA_PROT_ATAPI_DMA
:
4815 if (qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
)
4816 /* see ata_dma_blacklisted() */
4824 /* Some controllers show flaky interrupt behavior after
4825 * setting xfer mode. Use polling instead.
4827 if (unlikely(qc
->tf
.command
== ATA_CMD_SET_FEATURES
&&
4828 qc
->tf
.feature
== SETFEATURES_XFER
) &&
4829 (ap
->flags
& ATA_FLAG_SETXFER_POLLING
))
4830 qc
->tf
.flags
|= ATA_TFLAG_POLLING
;
4832 /* select the device */
4833 ata_dev_select(ap
, qc
->dev
->devno
, 1, 0);
4835 /* start the command */
4836 switch (qc
->tf
.protocol
) {
4837 case ATA_PROT_NODATA
:
4838 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
4839 ata_qc_set_polling(qc
);
4841 ata_tf_to_host(ap
, &qc
->tf
);
4842 ap
->hsm_task_state
= HSM_ST_LAST
;
4844 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
4845 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
4850 WARN_ON(qc
->tf
.flags
& ATA_TFLAG_POLLING
);
4852 ap
->ops
->tf_load(ap
, &qc
->tf
); /* load tf registers */
4853 ap
->ops
->bmdma_setup(qc
); /* set up bmdma */
4854 ap
->ops
->bmdma_start(qc
); /* initiate bmdma */
4855 ap
->hsm_task_state
= HSM_ST_LAST
;
4859 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
4860 ata_qc_set_polling(qc
);
4862 ata_tf_to_host(ap
, &qc
->tf
);
4864 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
) {
4865 /* PIO data out protocol */
4866 ap
->hsm_task_state
= HSM_ST_FIRST
;
4867 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
4869 /* always send first data block using
4870 * the ata_pio_task() codepath.
4873 /* PIO data in protocol */
4874 ap
->hsm_task_state
= HSM_ST
;
4876 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
4877 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
4879 /* if polling, ata_pio_task() handles the rest.
4880 * otherwise, interrupt handler takes over from here.
4886 case ATA_PROT_ATAPI
:
4887 case ATA_PROT_ATAPI_NODATA
:
4888 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
4889 ata_qc_set_polling(qc
);
4891 ata_tf_to_host(ap
, &qc
->tf
);
4893 ap
->hsm_task_state
= HSM_ST_FIRST
;
4895 /* send cdb by polling if no cdb interrupt */
4896 if ((!(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
)) ||
4897 (qc
->tf
.flags
& ATA_TFLAG_POLLING
))
4898 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
4901 case ATA_PROT_ATAPI_DMA
:
4902 WARN_ON(qc
->tf
.flags
& ATA_TFLAG_POLLING
);
4904 ap
->ops
->tf_load(ap
, &qc
->tf
); /* load tf registers */
4905 ap
->ops
->bmdma_setup(qc
); /* set up bmdma */
4906 ap
->hsm_task_state
= HSM_ST_FIRST
;
4908 /* send cdb by polling if no cdb interrupt */
4909 if (!(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
))
4910 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
4915 return AC_ERR_SYSTEM
;
4922 * ata_host_intr - Handle host interrupt for given (port, task)
4923 * @ap: Port on which interrupt arrived (possibly...)
4924 * @qc: Taskfile currently active in engine
4926 * Handle host interrupt for given queued command. Currently,
4927 * only DMA interrupts are handled. All other commands are
4928 * handled via polling with interrupts disabled (nIEN bit).
4931 * spin_lock_irqsave(host lock)
4934 * One if interrupt was handled, zero if not (shared irq).
4937 inline unsigned int ata_host_intr (struct ata_port
*ap
,
4938 struct ata_queued_cmd
*qc
)
4940 struct ata_eh_info
*ehi
= &ap
->eh_info
;
4941 u8 status
, host_stat
= 0;
4943 VPRINTK("ata%u: protocol %d task_state %d\n",
4944 ap
->id
, qc
->tf
.protocol
, ap
->hsm_task_state
);
4946 /* Check whether we are expecting interrupt in this state */
4947 switch (ap
->hsm_task_state
) {
4949 /* Some pre-ATAPI-4 devices assert INTRQ
4950 * at this state when ready to receive CDB.
4953 /* Check the ATA_DFLAG_CDB_INTR flag is enough here.
4954 * The flag was turned on only for atapi devices.
4955 * No need to check is_atapi_taskfile(&qc->tf) again.
4957 if (!(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
))
4961 if (qc
->tf
.protocol
== ATA_PROT_DMA
||
4962 qc
->tf
.protocol
== ATA_PROT_ATAPI_DMA
) {
4963 /* check status of DMA engine */
4964 host_stat
= ap
->ops
->bmdma_status(ap
);
4965 VPRINTK("ata%u: host_stat 0x%X\n", ap
->id
, host_stat
);
4967 /* if it's not our irq... */
4968 if (!(host_stat
& ATA_DMA_INTR
))
4971 /* before we do anything else, clear DMA-Start bit */
4972 ap
->ops
->bmdma_stop(qc
);
4974 if (unlikely(host_stat
& ATA_DMA_ERR
)) {
4975 /* error when transfering data to/from memory */
4976 qc
->err_mask
|= AC_ERR_HOST_BUS
;
4977 ap
->hsm_task_state
= HSM_ST_ERR
;
4987 /* check altstatus */
4988 status
= ata_altstatus(ap
);
4989 if (status
& ATA_BUSY
)
4992 /* check main status, clearing INTRQ */
4993 status
= ata_chk_status(ap
);
4994 if (unlikely(status
& ATA_BUSY
))
4997 /* ack bmdma irq events */
4998 ap
->ops
->irq_clear(ap
);
5000 ata_hsm_move(ap
, qc
, status
, 0);
5002 if (unlikely(qc
->err_mask
) && (qc
->tf
.protocol
== ATA_PROT_DMA
||
5003 qc
->tf
.protocol
== ATA_PROT_ATAPI_DMA
))
5004 ata_ehi_push_desc(ehi
, "BMDMA stat 0x%x", host_stat
);
5006 return 1; /* irq handled */
5009 ap
->stats
.idle_irq
++;
5012 if ((ap
->stats
.idle_irq
% 1000) == 0) {
5013 ata_irq_ack(ap
, 0); /* debug trap */
5014 ata_port_printk(ap
, KERN_WARNING
, "irq trap\n");
5018 return 0; /* irq not handled */
5022 * ata_interrupt - Default ATA host interrupt handler
5023 * @irq: irq line (unused)
5024 * @dev_instance: pointer to our ata_host information structure
5026 * Default interrupt handler for PCI IDE devices. Calls
5027 * ata_host_intr() for each port that is not disabled.
5030 * Obtains host lock during operation.
5033 * IRQ_NONE or IRQ_HANDLED.
5036 irqreturn_t
ata_interrupt (int irq
, void *dev_instance
)
5038 struct ata_host
*host
= dev_instance
;
5040 unsigned int handled
= 0;
5041 unsigned long flags
;
5043 /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */
5044 spin_lock_irqsave(&host
->lock
, flags
);
5046 for (i
= 0; i
< host
->n_ports
; i
++) {
5047 struct ata_port
*ap
;
5049 ap
= host
->ports
[i
];
5051 !(ap
->flags
& ATA_FLAG_DISABLED
)) {
5052 struct ata_queued_cmd
*qc
;
5054 qc
= ata_qc_from_tag(ap
, ap
->active_tag
);
5055 if (qc
&& (!(qc
->tf
.flags
& ATA_TFLAG_POLLING
)) &&
5056 (qc
->flags
& ATA_QCFLAG_ACTIVE
))
5057 handled
|= ata_host_intr(ap
, qc
);
5061 spin_unlock_irqrestore(&host
->lock
, flags
);
5063 return IRQ_RETVAL(handled
);
5067 * sata_scr_valid - test whether SCRs are accessible
5068 * @ap: ATA port to test SCR accessibility for
5070 * Test whether SCRs are accessible for @ap.
5076 * 1 if SCRs are accessible, 0 otherwise.
5078 int sata_scr_valid(struct ata_port
*ap
)
5080 return ap
->cbl
== ATA_CBL_SATA
&& ap
->ops
->scr_read
;
5084 * sata_scr_read - read SCR register of the specified port
5085 * @ap: ATA port to read SCR for
5087 * @val: Place to store read value
5089 * Read SCR register @reg of @ap into *@val. This function is
5090 * guaranteed to succeed if the cable type of the port is SATA
5091 * and the port implements ->scr_read.
5097 * 0 on success, negative errno on failure.
5099 int sata_scr_read(struct ata_port
*ap
, int reg
, u32
*val
)
5101 if (sata_scr_valid(ap
)) {
5102 *val
= ap
->ops
->scr_read(ap
, reg
);
5109 * sata_scr_write - write SCR register of the specified port
5110 * @ap: ATA port to write SCR for
5111 * @reg: SCR to write
5112 * @val: value to write
5114 * Write @val to SCR register @reg of @ap. This function is
5115 * guaranteed to succeed if the cable type of the port is SATA
5116 * and the port implements ->scr_read.
5122 * 0 on success, negative errno on failure.
5124 int sata_scr_write(struct ata_port
*ap
, int reg
, u32 val
)
5126 if (sata_scr_valid(ap
)) {
5127 ap
->ops
->scr_write(ap
, reg
, val
);
5134 * sata_scr_write_flush - write SCR register of the specified port and flush
5135 * @ap: ATA port to write SCR for
5136 * @reg: SCR to write
5137 * @val: value to write
5139 * This function is identical to sata_scr_write() except that this
5140 * function performs flush after writing to the register.
5146 * 0 on success, negative errno on failure.
5148 int sata_scr_write_flush(struct ata_port
*ap
, int reg
, u32 val
)
5150 if (sata_scr_valid(ap
)) {
5151 ap
->ops
->scr_write(ap
, reg
, val
);
5152 ap
->ops
->scr_read(ap
, reg
);
5159 * ata_port_online - test whether the given port is online
5160 * @ap: ATA port to test
5162 * Test whether @ap is online. Note that this function returns 0
5163 * if online status of @ap cannot be obtained, so
5164 * ata_port_online(ap) != !ata_port_offline(ap).
5170 * 1 if the port online status is available and online.
5172 int ata_port_online(struct ata_port
*ap
)
5176 if (!sata_scr_read(ap
, SCR_STATUS
, &sstatus
) && (sstatus
& 0xf) == 0x3)
5182 * ata_port_offline - test whether the given port is offline
5183 * @ap: ATA port to test
5185 * Test whether @ap is offline. Note that this function returns
5186 * 0 if offline status of @ap cannot be obtained, so
5187 * ata_port_online(ap) != !ata_port_offline(ap).
5193 * 1 if the port offline status is available and offline.
5195 int ata_port_offline(struct ata_port
*ap
)
5199 if (!sata_scr_read(ap
, SCR_STATUS
, &sstatus
) && (sstatus
& 0xf) != 0x3)
5204 int ata_flush_cache(struct ata_device
*dev
)
5206 unsigned int err_mask
;
5209 if (!ata_try_flush_cache(dev
))
5212 if (dev
->flags
& ATA_DFLAG_FLUSH_EXT
)
5213 cmd
= ATA_CMD_FLUSH_EXT
;
5215 cmd
= ATA_CMD_FLUSH
;
5217 err_mask
= ata_do_simple_cmd(dev
, cmd
);
5219 ata_dev_printk(dev
, KERN_ERR
, "failed to flush cache\n");
5226 static int ata_host_request_pm(struct ata_host
*host
, pm_message_t mesg
,
5227 unsigned int action
, unsigned int ehi_flags
,
5230 unsigned long flags
;
5233 for (i
= 0; i
< host
->n_ports
; i
++) {
5234 struct ata_port
*ap
= host
->ports
[i
];
5236 /* Previous resume operation might still be in
5237 * progress. Wait for PM_PENDING to clear.
5239 if (ap
->pflags
& ATA_PFLAG_PM_PENDING
) {
5240 ata_port_wait_eh(ap
);
5241 WARN_ON(ap
->pflags
& ATA_PFLAG_PM_PENDING
);
5244 /* request PM ops to EH */
5245 spin_lock_irqsave(ap
->lock
, flags
);
5250 ap
->pm_result
= &rc
;
5253 ap
->pflags
|= ATA_PFLAG_PM_PENDING
;
5254 ap
->eh_info
.action
|= action
;
5255 ap
->eh_info
.flags
|= ehi_flags
;
5257 ata_port_schedule_eh(ap
);
5259 spin_unlock_irqrestore(ap
->lock
, flags
);
5261 /* wait and check result */
5263 ata_port_wait_eh(ap
);
5264 WARN_ON(ap
->pflags
& ATA_PFLAG_PM_PENDING
);
5274 * ata_host_suspend - suspend host
5275 * @host: host to suspend
5278 * Suspend @host. Actual operation is performed by EH. This
5279 * function requests EH to perform PM operations and waits for EH
5283 * Kernel thread context (may sleep).
5286 * 0 on success, -errno on failure.
5288 int ata_host_suspend(struct ata_host
*host
, pm_message_t mesg
)
5292 rc
= ata_host_request_pm(host
, mesg
, 0, ATA_EHI_QUIET
, 1);
5296 /* EH is quiescent now. Fail if we have any ready device.
5297 * This happens if hotplug occurs between completion of device
5298 * suspension and here.
5300 for (i
= 0; i
< host
->n_ports
; i
++) {
5301 struct ata_port
*ap
= host
->ports
[i
];
5303 for (j
= 0; j
< ATA_MAX_DEVICES
; j
++) {
5304 struct ata_device
*dev
= &ap
->device
[j
];
5306 if (ata_dev_ready(dev
)) {
5307 ata_port_printk(ap
, KERN_WARNING
,
5308 "suspend failed, device %d "
5309 "still active\n", dev
->devno
);
5316 host
->dev
->power
.power_state
= mesg
;
5320 ata_host_resume(host
);
5325 * ata_host_resume - resume host
5326 * @host: host to resume
5328 * Resume @host. Actual operation is performed by EH. This
5329 * function requests EH to perform PM operations and returns.
5330 * Note that all resume operations are performed parallely.
5333 * Kernel thread context (may sleep).
5335 void ata_host_resume(struct ata_host
*host
)
5337 ata_host_request_pm(host
, PMSG_ON
, ATA_EH_SOFTRESET
,
5338 ATA_EHI_NO_AUTOPSY
| ATA_EHI_QUIET
, 0);
5339 host
->dev
->power
.power_state
= PMSG_ON
;
5343 * ata_port_start - Set port up for dma.
5344 * @ap: Port to initialize
5346 * Called just after data structures for each port are
5347 * initialized. Allocates space for PRD table.
5349 * May be used as the port_start() entry in ata_port_operations.
5352 * Inherited from caller.
5355 int ata_port_start (struct ata_port
*ap
)
5357 struct device
*dev
= ap
->dev
;
5360 ap
->prd
= dma_alloc_coherent(dev
, ATA_PRD_TBL_SZ
, &ap
->prd_dma
, GFP_KERNEL
);
5364 rc
= ata_pad_alloc(ap
, dev
);
5366 dma_free_coherent(dev
, ATA_PRD_TBL_SZ
, ap
->prd
, ap
->prd_dma
);
5370 DPRINTK("prd alloc, virt %p, dma %llx\n", ap
->prd
, (unsigned long long) ap
->prd_dma
);
5377 * ata_port_stop - Undo ata_port_start()
5378 * @ap: Port to shut down
5380 * Frees the PRD table.
5382 * May be used as the port_stop() entry in ata_port_operations.
5385 * Inherited from caller.
5388 void ata_port_stop (struct ata_port
*ap
)
5390 struct device
*dev
= ap
->dev
;
5392 dma_free_coherent(dev
, ATA_PRD_TBL_SZ
, ap
->prd
, ap
->prd_dma
);
5393 ata_pad_free(ap
, dev
);
5396 void ata_host_stop (struct ata_host
*host
)
5398 if (host
->mmio_base
)
5399 iounmap(host
->mmio_base
);
5403 * ata_dev_init - Initialize an ata_device structure
5404 * @dev: Device structure to initialize
5406 * Initialize @dev in preparation for probing.
5409 * Inherited from caller.
5411 void ata_dev_init(struct ata_device
*dev
)
5413 struct ata_port
*ap
= dev
->ap
;
5414 unsigned long flags
;
5416 /* SATA spd limit is bound to the first device */
5417 ap
->sata_spd_limit
= ap
->hw_sata_spd_limit
;
5419 /* High bits of dev->flags are used to record warm plug
5420 * requests which occur asynchronously. Synchronize using
5423 spin_lock_irqsave(ap
->lock
, flags
);
5424 dev
->flags
&= ~ATA_DFLAG_INIT_MASK
;
5425 spin_unlock_irqrestore(ap
->lock
, flags
);
5427 memset((void *)dev
+ ATA_DEVICE_CLEAR_OFFSET
, 0,
5428 sizeof(*dev
) - ATA_DEVICE_CLEAR_OFFSET
);
5429 dev
->pio_mask
= UINT_MAX
;
5430 dev
->mwdma_mask
= UINT_MAX
;
5431 dev
->udma_mask
= UINT_MAX
;
5435 * ata_port_init - Initialize an ata_port structure
5436 * @ap: Structure to initialize
5437 * @host: Collection of hosts to which @ap belongs
5438 * @ent: Probe information provided by low-level driver
5439 * @port_no: Port number associated with this ata_port
5441 * Initialize a new ata_port structure.
5444 * Inherited from caller.
5446 void ata_port_init(struct ata_port
*ap
, struct ata_host
*host
,
5447 const struct ata_probe_ent
*ent
, unsigned int port_no
)
5451 ap
->lock
= &host
->lock
;
5452 ap
->flags
= ATA_FLAG_DISABLED
;
5453 ap
->id
= ata_unique_id
++;
5454 ap
->ctl
= ATA_DEVCTL_OBS
;
5457 ap
->port_no
= port_no
;
5458 if (port_no
== 1 && ent
->pinfo2
) {
5459 ap
->pio_mask
= ent
->pinfo2
->pio_mask
;
5460 ap
->mwdma_mask
= ent
->pinfo2
->mwdma_mask
;
5461 ap
->udma_mask
= ent
->pinfo2
->udma_mask
;
5462 ap
->flags
|= ent
->pinfo2
->flags
;
5463 ap
->ops
= ent
->pinfo2
->port_ops
;
5465 ap
->pio_mask
= ent
->pio_mask
;
5466 ap
->mwdma_mask
= ent
->mwdma_mask
;
5467 ap
->udma_mask
= ent
->udma_mask
;
5468 ap
->flags
|= ent
->port_flags
;
5469 ap
->ops
= ent
->port_ops
;
5471 ap
->hw_sata_spd_limit
= UINT_MAX
;
5472 ap
->active_tag
= ATA_TAG_POISON
;
5473 ap
->last_ctl
= 0xFF;
5475 #if defined(ATA_VERBOSE_DEBUG)
5476 /* turn on all debugging levels */
5477 ap
->msg_enable
= 0x00FF;
5478 #elif defined(ATA_DEBUG)
5479 ap
->msg_enable
= ATA_MSG_DRV
| ATA_MSG_INFO
| ATA_MSG_CTL
| ATA_MSG_WARN
| ATA_MSG_ERR
;
5481 ap
->msg_enable
= ATA_MSG_DRV
| ATA_MSG_ERR
| ATA_MSG_WARN
;
5484 INIT_WORK(&ap
->port_task
, NULL
, NULL
);
5485 INIT_WORK(&ap
->hotplug_task
, ata_scsi_hotplug
, ap
);
5486 INIT_WORK(&ap
->scsi_rescan_task
, ata_scsi_dev_rescan
, ap
);
5487 INIT_LIST_HEAD(&ap
->eh_done_q
);
5488 init_waitqueue_head(&ap
->eh_wait_q
);
5490 /* set cable type */
5491 ap
->cbl
= ATA_CBL_NONE
;
5492 if (ap
->flags
& ATA_FLAG_SATA
)
5493 ap
->cbl
= ATA_CBL_SATA
;
5495 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
5496 struct ata_device
*dev
= &ap
->device
[i
];
5503 ap
->stats
.unhandled_irq
= 1;
5504 ap
->stats
.idle_irq
= 1;
5507 memcpy(&ap
->ioaddr
, &ent
->port
[port_no
], sizeof(struct ata_ioports
));
5511 * ata_port_init_shost - Initialize SCSI host associated with ATA port
5512 * @ap: ATA port to initialize SCSI host for
5513 * @shost: SCSI host associated with @ap
5515 * Initialize SCSI host @shost associated with ATA port @ap.
5518 * Inherited from caller.
5520 static void ata_port_init_shost(struct ata_port
*ap
, struct Scsi_Host
*shost
)
5522 ap
->scsi_host
= shost
;
5524 shost
->unique_id
= ap
->id
;
5527 shost
->max_channel
= 1;
5528 shost
->max_cmd_len
= 12;
5532 * ata_port_add - Attach low-level ATA driver to system
5533 * @ent: Information provided by low-level driver
5534 * @host: Collections of ports to which we add
5535 * @port_no: Port number associated with this host
5537 * Attach low-level ATA driver to system.
5540 * PCI/etc. bus probe sem.
5543 * New ata_port on success, for NULL on error.
5545 static struct ata_port
* ata_port_add(const struct ata_probe_ent
*ent
,
5546 struct ata_host
*host
,
5547 unsigned int port_no
)
5549 struct Scsi_Host
*shost
;
5550 struct ata_port
*ap
;
5554 if (!ent
->port_ops
->error_handler
&&
5555 !(ent
->port_flags
& (ATA_FLAG_SATA_RESET
| ATA_FLAG_SRST
))) {
5556 printk(KERN_ERR
"ata%u: no reset mechanism available\n",
5561 shost
= scsi_host_alloc(ent
->sht
, sizeof(struct ata_port
));
5565 shost
->transportt
= &ata_scsi_transport_template
;
5567 ap
= ata_shost_to_port(shost
);
5569 ata_port_init(ap
, host
, ent
, port_no
);
5570 ata_port_init_shost(ap
, shost
);
5576 * ata_sas_host_init - Initialize a host struct
5577 * @host: host to initialize
5578 * @dev: device host is attached to
5579 * @flags: host flags
5583 * PCI/etc. bus probe sem.
5587 void ata_host_init(struct ata_host
*host
, struct device
*dev
,
5588 unsigned long flags
, const struct ata_port_operations
*ops
)
5590 spin_lock_init(&host
->lock
);
5592 host
->flags
= flags
;
5597 * ata_device_add - Register hardware device with ATA and SCSI layers
5598 * @ent: Probe information describing hardware device to be registered
5600 * This function processes the information provided in the probe
5601 * information struct @ent, allocates the necessary ATA and SCSI
5602 * host information structures, initializes them, and registers
5603 * everything with requisite kernel subsystems.
5605 * This function requests irqs, probes the ATA bus, and probes
5609 * PCI/etc. bus probe sem.
5612 * Number of ports registered. Zero on error (no ports registered).
5614 int ata_device_add(const struct ata_probe_ent
*ent
)
5617 struct device
*dev
= ent
->dev
;
5618 struct ata_host
*host
;
5623 if (ent
->irq
== 0) {
5624 dev_printk(KERN_ERR
, dev
, "is not available: No interrupt assigned.\n");
5627 /* alloc a container for our list of ATA ports (buses) */
5628 host
= kzalloc(sizeof(struct ata_host
) +
5629 (ent
->n_ports
* sizeof(void *)), GFP_KERNEL
);
5633 ata_host_init(host
, dev
, ent
->_host_flags
, ent
->port_ops
);
5634 host
->n_ports
= ent
->n_ports
;
5635 host
->irq
= ent
->irq
;
5636 host
->irq2
= ent
->irq2
;
5637 host
->mmio_base
= ent
->mmio_base
;
5638 host
->private_data
= ent
->private_data
;
5640 /* register each port bound to this device */
5641 for (i
= 0; i
< host
->n_ports
; i
++) {
5642 struct ata_port
*ap
;
5643 unsigned long xfer_mode_mask
;
5644 int irq_line
= ent
->irq
;
5646 ap
= ata_port_add(ent
, host
, i
);
5647 host
->ports
[i
] = ap
;
5652 if (ent
->dummy_port_mask
& (1 << i
)) {
5653 ata_port_printk(ap
, KERN_INFO
, "DUMMY\n");
5654 ap
->ops
= &ata_dummy_port_ops
;
5659 rc
= ap
->ops
->port_start(ap
);
5661 host
->ports
[i
] = NULL
;
5662 scsi_host_put(ap
->scsi_host
);
5666 /* Report the secondary IRQ for second channel legacy */
5667 if (i
== 1 && ent
->irq2
)
5668 irq_line
= ent
->irq2
;
5670 xfer_mode_mask
=(ap
->udma_mask
<< ATA_SHIFT_UDMA
) |
5671 (ap
->mwdma_mask
<< ATA_SHIFT_MWDMA
) |
5672 (ap
->pio_mask
<< ATA_SHIFT_PIO
);
5674 /* print per-port info to dmesg */
5675 ata_port_printk(ap
, KERN_INFO
, "%cATA max %s cmd 0x%lX "
5676 "ctl 0x%lX bmdma 0x%lX irq %d\n",
5677 ap
->flags
& ATA_FLAG_SATA
? 'S' : 'P',
5678 ata_mode_string(xfer_mode_mask
),
5679 ap
->ioaddr
.cmd_addr
,
5680 ap
->ioaddr
.ctl_addr
,
5681 ap
->ioaddr
.bmdma_addr
,
5684 /* freeze port before requesting IRQ */
5685 ata_eh_freeze_port(ap
);
5688 /* obtain irq, that may be shared between channels */
5689 rc
= request_irq(ent
->irq
, ent
->port_ops
->irq_handler
, ent
->irq_flags
,
5692 dev_printk(KERN_ERR
, dev
, "irq %lu request failed: %d\n",
5697 /* do we have a second IRQ for the other channel, eg legacy mode */
5699 /* We will get weird core code crashes later if this is true
5701 BUG_ON(ent
->irq
== ent
->irq2
);
5703 rc
= request_irq(ent
->irq2
, ent
->port_ops
->irq_handler
, ent
->irq_flags
,
5706 dev_printk(KERN_ERR
, dev
, "irq %lu request failed: %d\n",
5708 goto err_out_free_irq
;
5712 /* perform each probe synchronously */
5713 DPRINTK("probe begin\n");
5714 for (i
= 0; i
< host
->n_ports
; i
++) {
5715 struct ata_port
*ap
= host
->ports
[i
];
5719 /* init sata_spd_limit to the current value */
5720 if (sata_scr_read(ap
, SCR_CONTROL
, &scontrol
) == 0) {
5721 int spd
= (scontrol
>> 4) & 0xf;
5722 ap
->hw_sata_spd_limit
&= (1 << spd
) - 1;
5724 ap
->sata_spd_limit
= ap
->hw_sata_spd_limit
;
5726 rc
= scsi_add_host(ap
->scsi_host
, dev
);
5728 ata_port_printk(ap
, KERN_ERR
, "scsi_add_host failed\n");
5729 /* FIXME: do something useful here */
5730 /* FIXME: handle unconditional calls to
5731 * scsi_scan_host and ata_host_remove, below,
5736 if (ap
->ops
->error_handler
) {
5737 struct ata_eh_info
*ehi
= &ap
->eh_info
;
5738 unsigned long flags
;
5742 /* kick EH for boot probing */
5743 spin_lock_irqsave(ap
->lock
, flags
);
5745 ehi
->probe_mask
= (1 << ATA_MAX_DEVICES
) - 1;
5746 ehi
->action
|= ATA_EH_SOFTRESET
;
5747 ehi
->flags
|= ATA_EHI_NO_AUTOPSY
| ATA_EHI_QUIET
;
5749 ap
->pflags
|= ATA_PFLAG_LOADING
;
5750 ata_port_schedule_eh(ap
);
5752 spin_unlock_irqrestore(ap
->lock
, flags
);
5754 /* wait for EH to finish */
5755 ata_port_wait_eh(ap
);
5757 DPRINTK("ata%u: bus probe begin\n", ap
->id
);
5758 rc
= ata_bus_probe(ap
);
5759 DPRINTK("ata%u: bus probe end\n", ap
->id
);
5762 /* FIXME: do something useful here?
5763 * Current libata behavior will
5764 * tear down everything when
5765 * the module is removed
5766 * or the h/w is unplugged.
5772 /* probes are done, now scan each port's disk(s) */
5773 DPRINTK("host probe begin\n");
5774 for (i
= 0; i
< host
->n_ports
; i
++) {
5775 struct ata_port
*ap
= host
->ports
[i
];
5777 ata_scsi_scan_host(ap
);
5780 dev_set_drvdata(dev
, host
);
5782 VPRINTK("EXIT, returning %u\n", ent
->n_ports
);
5783 return ent
->n_ports
; /* success */
5786 free_irq(ent
->irq
, host
);
5788 for (i
= 0; i
< host
->n_ports
; i
++) {
5789 struct ata_port
*ap
= host
->ports
[i
];
5791 ap
->ops
->port_stop(ap
);
5792 scsi_host_put(ap
->scsi_host
);
5797 VPRINTK("EXIT, returning 0\n");
5802 * ata_port_detach - Detach ATA port in prepration of device removal
5803 * @ap: ATA port to be detached
5805 * Detach all ATA devices and the associated SCSI devices of @ap;
5806 * then, remove the associated SCSI host. @ap is guaranteed to
5807 * be quiescent on return from this function.
5810 * Kernel thread context (may sleep).
5812 void ata_port_detach(struct ata_port
*ap
)
5814 unsigned long flags
;
5817 if (!ap
->ops
->error_handler
)
5820 /* tell EH we're leaving & flush EH */
5821 spin_lock_irqsave(ap
->lock
, flags
);
5822 ap
->pflags
|= ATA_PFLAG_UNLOADING
;
5823 spin_unlock_irqrestore(ap
->lock
, flags
);
5825 ata_port_wait_eh(ap
);
5827 /* EH is now guaranteed to see UNLOADING, so no new device
5828 * will be attached. Disable all existing devices.
5830 spin_lock_irqsave(ap
->lock
, flags
);
5832 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
5833 ata_dev_disable(&ap
->device
[i
]);
5835 spin_unlock_irqrestore(ap
->lock
, flags
);
5837 /* Final freeze & EH. All in-flight commands are aborted. EH
5838 * will be skipped and retrials will be terminated with bad
5841 spin_lock_irqsave(ap
->lock
, flags
);
5842 ata_port_freeze(ap
); /* won't be thawed */
5843 spin_unlock_irqrestore(ap
->lock
, flags
);
5845 ata_port_wait_eh(ap
);
5847 /* Flush hotplug task. The sequence is similar to
5848 * ata_port_flush_task().
5850 flush_workqueue(ata_aux_wq
);
5851 cancel_delayed_work(&ap
->hotplug_task
);
5852 flush_workqueue(ata_aux_wq
);
5855 /* remove the associated SCSI host */
5856 scsi_remove_host(ap
->scsi_host
);
5860 * ata_host_remove - PCI layer callback for device removal
5861 * @host: ATA host set that was removed
5863 * Unregister all objects associated with this host set. Free those
5867 * Inherited from calling layer (may sleep).
5870 void ata_host_remove(struct ata_host
*host
)
5874 for (i
= 0; i
< host
->n_ports
; i
++)
5875 ata_port_detach(host
->ports
[i
]);
5877 free_irq(host
->irq
, host
);
5879 free_irq(host
->irq2
, host
);
5881 for (i
= 0; i
< host
->n_ports
; i
++) {
5882 struct ata_port
*ap
= host
->ports
[i
];
5884 ata_scsi_release(ap
->scsi_host
);
5886 if ((ap
->flags
& ATA_FLAG_NO_LEGACY
) == 0) {
5887 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
5889 /* FIXME: Add -ac IDE pci mods to remove these special cases */
5890 if (ioaddr
->cmd_addr
== ATA_PRIMARY_CMD
)
5891 release_region(ATA_PRIMARY_CMD
, 8);
5892 else if (ioaddr
->cmd_addr
== ATA_SECONDARY_CMD
)
5893 release_region(ATA_SECONDARY_CMD
, 8);
5896 scsi_host_put(ap
->scsi_host
);
5899 if (host
->ops
->host_stop
)
5900 host
->ops
->host_stop(host
);
5906 * ata_scsi_release - SCSI layer callback hook for host unload
5907 * @shost: libata host to be unloaded
5909 * Performs all duties necessary to shut down a libata port...
5910 * Kill port kthread, disable port, and release resources.
5913 * Inherited from SCSI layer.
5919 int ata_scsi_release(struct Scsi_Host
*shost
)
5921 struct ata_port
*ap
= ata_shost_to_port(shost
);
5925 ap
->ops
->port_disable(ap
);
5926 ap
->ops
->port_stop(ap
);
5932 struct ata_probe_ent
*
5933 ata_probe_ent_alloc(struct device
*dev
, const struct ata_port_info
*port
)
5935 struct ata_probe_ent
*probe_ent
;
5937 probe_ent
= kzalloc(sizeof(*probe_ent
), GFP_KERNEL
);
5939 printk(KERN_ERR DRV_NAME
"(%s): out of memory\n",
5940 kobject_name(&(dev
->kobj
)));
5944 INIT_LIST_HEAD(&probe_ent
->node
);
5945 probe_ent
->dev
= dev
;
5947 probe_ent
->sht
= port
->sht
;
5948 probe_ent
->port_flags
= port
->flags
;
5949 probe_ent
->pio_mask
= port
->pio_mask
;
5950 probe_ent
->mwdma_mask
= port
->mwdma_mask
;
5951 probe_ent
->udma_mask
= port
->udma_mask
;
5952 probe_ent
->port_ops
= port
->port_ops
;
5953 probe_ent
->private_data
= port
->private_data
;
5959 * ata_std_ports - initialize ioaddr with standard port offsets.
5960 * @ioaddr: IO address structure to be initialized
5962 * Utility function which initializes data_addr, error_addr,
5963 * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr,
5964 * device_addr, status_addr, and command_addr to standard offsets
5965 * relative to cmd_addr.
5967 * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr.
5970 void ata_std_ports(struct ata_ioports
*ioaddr
)
5972 ioaddr
->data_addr
= ioaddr
->cmd_addr
+ ATA_REG_DATA
;
5973 ioaddr
->error_addr
= ioaddr
->cmd_addr
+ ATA_REG_ERR
;
5974 ioaddr
->feature_addr
= ioaddr
->cmd_addr
+ ATA_REG_FEATURE
;
5975 ioaddr
->nsect_addr
= ioaddr
->cmd_addr
+ ATA_REG_NSECT
;
5976 ioaddr
->lbal_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAL
;
5977 ioaddr
->lbam_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAM
;
5978 ioaddr
->lbah_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAH
;
5979 ioaddr
->device_addr
= ioaddr
->cmd_addr
+ ATA_REG_DEVICE
;
5980 ioaddr
->status_addr
= ioaddr
->cmd_addr
+ ATA_REG_STATUS
;
5981 ioaddr
->command_addr
= ioaddr
->cmd_addr
+ ATA_REG_CMD
;
5987 void ata_pci_host_stop (struct ata_host
*host
)
5989 struct pci_dev
*pdev
= to_pci_dev(host
->dev
);
5991 pci_iounmap(pdev
, host
->mmio_base
);
5995 * ata_pci_remove_one - PCI layer callback for device removal
5996 * @pdev: PCI device that was removed
5998 * PCI layer indicates to libata via this hook that
5999 * hot-unplug or module unload event has occurred.
6000 * Handle this by unregistering all objects associated
6001 * with this PCI device. Free those objects. Then finally
6002 * release PCI resources and disable device.
6005 * Inherited from PCI layer (may sleep).
6008 void ata_pci_remove_one (struct pci_dev
*pdev
)
6010 struct device
*dev
= pci_dev_to_dev(pdev
);
6011 struct ata_host
*host
= dev_get_drvdata(dev
);
6013 ata_host_remove(host
);
6015 pci_release_regions(pdev
);
6016 pci_disable_device(pdev
);
6017 dev_set_drvdata(dev
, NULL
);
6020 /* move to PCI subsystem */
6021 int pci_test_config_bits(struct pci_dev
*pdev
, const struct pci_bits
*bits
)
6023 unsigned long tmp
= 0;
6025 switch (bits
->width
) {
6028 pci_read_config_byte(pdev
, bits
->reg
, &tmp8
);
6034 pci_read_config_word(pdev
, bits
->reg
, &tmp16
);
6040 pci_read_config_dword(pdev
, bits
->reg
, &tmp32
);
6051 return (tmp
== bits
->val
) ? 1 : 0;
6054 void ata_pci_device_do_suspend(struct pci_dev
*pdev
, pm_message_t mesg
)
6056 pci_save_state(pdev
);
6058 if (mesg
.event
== PM_EVENT_SUSPEND
) {
6059 pci_disable_device(pdev
);
6060 pci_set_power_state(pdev
, PCI_D3hot
);
6064 void ata_pci_device_do_resume(struct pci_dev
*pdev
)
6066 pci_set_power_state(pdev
, PCI_D0
);
6067 pci_restore_state(pdev
);
6068 pci_enable_device(pdev
);
6069 pci_set_master(pdev
);
6072 int ata_pci_device_suspend(struct pci_dev
*pdev
, pm_message_t mesg
)
6074 struct ata_host
*host
= dev_get_drvdata(&pdev
->dev
);
6077 rc
= ata_host_suspend(host
, mesg
);
6081 ata_pci_device_do_suspend(pdev
, mesg
);
6086 int ata_pci_device_resume(struct pci_dev
*pdev
)
6088 struct ata_host
*host
= dev_get_drvdata(&pdev
->dev
);
6090 ata_pci_device_do_resume(pdev
);
6091 ata_host_resume(host
);
6094 #endif /* CONFIG_PCI */
6097 static int __init
ata_init(void)
6099 ata_probe_timeout
*= HZ
;
6100 ata_wq
= create_workqueue("ata");
6104 ata_aux_wq
= create_singlethread_workqueue("ata_aux");
6106 destroy_workqueue(ata_wq
);
6110 printk(KERN_DEBUG
"libata version " DRV_VERSION
" loaded.\n");
6114 static void __exit
ata_exit(void)
6116 destroy_workqueue(ata_wq
);
6117 destroy_workqueue(ata_aux_wq
);
6120 subsys_initcall(ata_init
);
6121 module_exit(ata_exit
);
6123 static unsigned long ratelimit_time
;
6124 static DEFINE_SPINLOCK(ata_ratelimit_lock
);
6126 int ata_ratelimit(void)
6129 unsigned long flags
;
6131 spin_lock_irqsave(&ata_ratelimit_lock
, flags
);
6133 if (time_after(jiffies
, ratelimit_time
)) {
6135 ratelimit_time
= jiffies
+ (HZ
/5);
6139 spin_unlock_irqrestore(&ata_ratelimit_lock
, flags
);
6145 * ata_wait_register - wait until register value changes
6146 * @reg: IO-mapped register
6147 * @mask: Mask to apply to read register value
6148 * @val: Wait condition
6149 * @interval_msec: polling interval in milliseconds
6150 * @timeout_msec: timeout in milliseconds
6152 * Waiting for some bits of register to change is a common
6153 * operation for ATA controllers. This function reads 32bit LE
6154 * IO-mapped register @reg and tests for the following condition.
6156 * (*@reg & mask) != val
6158 * If the condition is met, it returns; otherwise, the process is
6159 * repeated after @interval_msec until timeout.
6162 * Kernel thread context (may sleep)
6165 * The final register value.
6167 u32
ata_wait_register(void __iomem
*reg
, u32 mask
, u32 val
,
6168 unsigned long interval_msec
,
6169 unsigned long timeout_msec
)
6171 unsigned long timeout
;
6174 tmp
= ioread32(reg
);
6176 /* Calculate timeout _after_ the first read to make sure
6177 * preceding writes reach the controller before starting to
6178 * eat away the timeout.
6180 timeout
= jiffies
+ (timeout_msec
* HZ
) / 1000;
6182 while ((tmp
& mask
) == val
&& time_before(jiffies
, timeout
)) {
6183 msleep(interval_msec
);
6184 tmp
= ioread32(reg
);
6193 static void ata_dummy_noret(struct ata_port
*ap
) { }
6194 static int ata_dummy_ret0(struct ata_port
*ap
) { return 0; }
6195 static void ata_dummy_qc_noret(struct ata_queued_cmd
*qc
) { }
6197 static u8
ata_dummy_check_status(struct ata_port
*ap
)
6202 static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd
*qc
)
6204 return AC_ERR_SYSTEM
;
6207 const struct ata_port_operations ata_dummy_port_ops
= {
6208 .port_disable
= ata_port_disable
,
6209 .check_status
= ata_dummy_check_status
,
6210 .check_altstatus
= ata_dummy_check_status
,
6211 .dev_select
= ata_noop_dev_select
,
6212 .qc_prep
= ata_noop_qc_prep
,
6213 .qc_issue
= ata_dummy_qc_issue
,
6214 .freeze
= ata_dummy_noret
,
6215 .thaw
= ata_dummy_noret
,
6216 .error_handler
= ata_dummy_noret
,
6217 .post_internal_cmd
= ata_dummy_qc_noret
,
6218 .irq_clear
= ata_dummy_noret
,
6219 .port_start
= ata_dummy_ret0
,
6220 .port_stop
= ata_dummy_noret
,
6224 * libata is essentially a library of internal helper functions for
6225 * low-level ATA host controller drivers. As such, the API/ABI is
6226 * likely to change as new drivers are added and updated.
6227 * Do not depend on ABI/API stability.
6230 EXPORT_SYMBOL_GPL(sata_deb_timing_normal
);
6231 EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug
);
6232 EXPORT_SYMBOL_GPL(sata_deb_timing_long
);
6233 EXPORT_SYMBOL_GPL(ata_dummy_port_ops
);
6234 EXPORT_SYMBOL_GPL(ata_std_bios_param
);
6235 EXPORT_SYMBOL_GPL(ata_std_ports
);
6236 EXPORT_SYMBOL_GPL(ata_host_init
);
6237 EXPORT_SYMBOL_GPL(ata_device_add
);
6238 EXPORT_SYMBOL_GPL(ata_port_detach
);
6239 EXPORT_SYMBOL_GPL(ata_host_remove
);
6240 EXPORT_SYMBOL_GPL(ata_sg_init
);
6241 EXPORT_SYMBOL_GPL(ata_sg_init_one
);
6242 EXPORT_SYMBOL_GPL(ata_hsm_move
);
6243 EXPORT_SYMBOL_GPL(ata_qc_complete
);
6244 EXPORT_SYMBOL_GPL(ata_qc_complete_multiple
);
6245 EXPORT_SYMBOL_GPL(ata_qc_issue_prot
);
6246 EXPORT_SYMBOL_GPL(ata_tf_load
);
6247 EXPORT_SYMBOL_GPL(ata_tf_read
);
6248 EXPORT_SYMBOL_GPL(ata_noop_dev_select
);
6249 EXPORT_SYMBOL_GPL(ata_std_dev_select
);
6250 EXPORT_SYMBOL_GPL(ata_tf_to_fis
);
6251 EXPORT_SYMBOL_GPL(ata_tf_from_fis
);
6252 EXPORT_SYMBOL_GPL(ata_check_status
);
6253 EXPORT_SYMBOL_GPL(ata_altstatus
);
6254 EXPORT_SYMBOL_GPL(ata_exec_command
);
6255 EXPORT_SYMBOL_GPL(ata_port_start
);
6256 EXPORT_SYMBOL_GPL(ata_port_stop
);
6257 EXPORT_SYMBOL_GPL(ata_host_stop
);
6258 EXPORT_SYMBOL_GPL(ata_interrupt
);
6259 EXPORT_SYMBOL_GPL(ata_mmio_data_xfer
);
6260 EXPORT_SYMBOL_GPL(ata_pio_data_xfer
);
6261 EXPORT_SYMBOL_GPL(ata_pio_data_xfer_noirq
);
6262 EXPORT_SYMBOL_GPL(ata_qc_prep
);
6263 EXPORT_SYMBOL_GPL(ata_noop_qc_prep
);
6264 EXPORT_SYMBOL_GPL(ata_bmdma_setup
);
6265 EXPORT_SYMBOL_GPL(ata_bmdma_start
);
6266 EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear
);
6267 EXPORT_SYMBOL_GPL(ata_bmdma_status
);
6268 EXPORT_SYMBOL_GPL(ata_bmdma_stop
);
6269 EXPORT_SYMBOL_GPL(ata_bmdma_freeze
);
6270 EXPORT_SYMBOL_GPL(ata_bmdma_thaw
);
6271 EXPORT_SYMBOL_GPL(ata_bmdma_drive_eh
);
6272 EXPORT_SYMBOL_GPL(ata_bmdma_error_handler
);
6273 EXPORT_SYMBOL_GPL(ata_bmdma_post_internal_cmd
);
6274 EXPORT_SYMBOL_GPL(ata_port_probe
);
6275 EXPORT_SYMBOL_GPL(sata_set_spd
);
6276 EXPORT_SYMBOL_GPL(sata_phy_debounce
);
6277 EXPORT_SYMBOL_GPL(sata_phy_resume
);
6278 EXPORT_SYMBOL_GPL(sata_phy_reset
);
6279 EXPORT_SYMBOL_GPL(__sata_phy_reset
);
6280 EXPORT_SYMBOL_GPL(ata_bus_reset
);
6281 EXPORT_SYMBOL_GPL(ata_std_prereset
);
6282 EXPORT_SYMBOL_GPL(ata_std_softreset
);
6283 EXPORT_SYMBOL_GPL(sata_port_hardreset
);
6284 EXPORT_SYMBOL_GPL(sata_std_hardreset
);
6285 EXPORT_SYMBOL_GPL(ata_std_postreset
);
6286 EXPORT_SYMBOL_GPL(ata_dev_classify
);
6287 EXPORT_SYMBOL_GPL(ata_dev_pair
);
6288 EXPORT_SYMBOL_GPL(ata_port_disable
);
6289 EXPORT_SYMBOL_GPL(ata_ratelimit
);
6290 EXPORT_SYMBOL_GPL(ata_wait_register
);
6291 EXPORT_SYMBOL_GPL(ata_busy_sleep
);
6292 EXPORT_SYMBOL_GPL(ata_port_queue_task
);
6293 EXPORT_SYMBOL_GPL(ata_scsi_ioctl
);
6294 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd
);
6295 EXPORT_SYMBOL_GPL(ata_scsi_slave_config
);
6296 EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy
);
6297 EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth
);
6298 EXPORT_SYMBOL_GPL(ata_scsi_release
);
6299 EXPORT_SYMBOL_GPL(ata_host_intr
);
6300 EXPORT_SYMBOL_GPL(sata_scr_valid
);
6301 EXPORT_SYMBOL_GPL(sata_scr_read
);
6302 EXPORT_SYMBOL_GPL(sata_scr_write
);
6303 EXPORT_SYMBOL_GPL(sata_scr_write_flush
);
6304 EXPORT_SYMBOL_GPL(ata_port_online
);
6305 EXPORT_SYMBOL_GPL(ata_port_offline
);
6306 EXPORT_SYMBOL_GPL(ata_host_suspend
);
6307 EXPORT_SYMBOL_GPL(ata_host_resume
);
6308 EXPORT_SYMBOL_GPL(ata_id_string
);
6309 EXPORT_SYMBOL_GPL(ata_id_c_string
);
6310 EXPORT_SYMBOL_GPL(ata_device_blacklisted
);
6311 EXPORT_SYMBOL_GPL(ata_scsi_simulate
);
6313 EXPORT_SYMBOL_GPL(ata_pio_need_iordy
);
6314 EXPORT_SYMBOL_GPL(ata_timing_compute
);
6315 EXPORT_SYMBOL_GPL(ata_timing_merge
);
6318 EXPORT_SYMBOL_GPL(pci_test_config_bits
);
6319 EXPORT_SYMBOL_GPL(ata_pci_host_stop
);
6320 EXPORT_SYMBOL_GPL(ata_pci_init_native_mode
);
6321 EXPORT_SYMBOL_GPL(ata_pci_init_one
);
6322 EXPORT_SYMBOL_GPL(ata_pci_remove_one
);
6323 EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend
);
6324 EXPORT_SYMBOL_GPL(ata_pci_device_do_resume
);
6325 EXPORT_SYMBOL_GPL(ata_pci_device_suspend
);
6326 EXPORT_SYMBOL_GPL(ata_pci_device_resume
);
6327 EXPORT_SYMBOL_GPL(ata_pci_default_filter
);
6328 EXPORT_SYMBOL_GPL(ata_pci_clear_simplex
);
6329 #endif /* CONFIG_PCI */
6331 EXPORT_SYMBOL_GPL(ata_scsi_device_suspend
);
6332 EXPORT_SYMBOL_GPL(ata_scsi_device_resume
);
6334 EXPORT_SYMBOL_GPL(ata_eng_timeout
);
6335 EXPORT_SYMBOL_GPL(ata_port_schedule_eh
);
6336 EXPORT_SYMBOL_GPL(ata_port_abort
);
6337 EXPORT_SYMBOL_GPL(ata_port_freeze
);
6338 EXPORT_SYMBOL_GPL(ata_eh_freeze_port
);
6339 EXPORT_SYMBOL_GPL(ata_eh_thaw_port
);
6340 EXPORT_SYMBOL_GPL(ata_eh_qc_complete
);
6341 EXPORT_SYMBOL_GPL(ata_eh_qc_retry
);
6342 EXPORT_SYMBOL_GPL(ata_do_eh
);