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/config.h>
36 #include <linux/kernel.h>
37 #include <linux/module.h>
38 #include <linux/pci.h>
39 #include <linux/init.h>
40 #include <linux/list.h>
42 #include <linux/highmem.h>
43 #include <linux/spinlock.h>
44 #include <linux/blkdev.h>
45 #include <linux/delay.h>
46 #include <linux/timer.h>
47 #include <linux/interrupt.h>
48 #include <linux/completion.h>
49 #include <linux/suspend.h>
50 #include <linux/workqueue.h>
51 #include <linux/jiffies.h>
52 #include <linux/scatterlist.h>
53 #include <scsi/scsi.h>
54 #include "scsi_priv.h"
55 #include <scsi/scsi_cmnd.h>
56 #include <scsi/scsi_host.h>
57 #include <linux/libata.h>
59 #include <asm/semaphore.h>
60 #include <asm/byteorder.h>
64 static unsigned int ata_dev_init_params(struct ata_port
*ap
,
65 struct ata_device
*dev
);
66 static void ata_set_mode(struct ata_port
*ap
);
67 static void ata_dev_set_xfermode(struct ata_port
*ap
, struct ata_device
*dev
);
68 static void ata_dev_xfermask(struct ata_port
*ap
, struct ata_device
*dev
);
70 static unsigned int ata_unique_id
= 1;
71 static struct workqueue_struct
*ata_wq
;
73 int atapi_enabled
= 1;
74 module_param(atapi_enabled
, int, 0444);
75 MODULE_PARM_DESC(atapi_enabled
, "Enable discovery of ATAPI devices (0=off, 1=on)");
78 module_param_named(fua
, libata_fua
, int, 0444);
79 MODULE_PARM_DESC(fua
, "FUA support (0=off, 1=on)");
81 MODULE_AUTHOR("Jeff Garzik");
82 MODULE_DESCRIPTION("Library module for ATA devices");
83 MODULE_LICENSE("GPL");
84 MODULE_VERSION(DRV_VERSION
);
88 * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure
89 * @tf: Taskfile to convert
90 * @fis: Buffer into which data will output
91 * @pmp: Port multiplier port
93 * Converts a standard ATA taskfile to a Serial ATA
94 * FIS structure (Register - Host to Device).
97 * Inherited from caller.
100 void ata_tf_to_fis(const struct ata_taskfile
*tf
, u8
*fis
, u8 pmp
)
102 fis
[0] = 0x27; /* Register - Host to Device FIS */
103 fis
[1] = (pmp
& 0xf) | (1 << 7); /* Port multiplier number,
104 bit 7 indicates Command FIS */
105 fis
[2] = tf
->command
;
106 fis
[3] = tf
->feature
;
113 fis
[8] = tf
->hob_lbal
;
114 fis
[9] = tf
->hob_lbam
;
115 fis
[10] = tf
->hob_lbah
;
116 fis
[11] = tf
->hob_feature
;
119 fis
[13] = tf
->hob_nsect
;
130 * ata_tf_from_fis - Convert SATA FIS to ATA taskfile
131 * @fis: Buffer from which data will be input
132 * @tf: Taskfile to output
134 * Converts a serial ATA FIS structure to a standard ATA taskfile.
137 * Inherited from caller.
140 void ata_tf_from_fis(const u8
*fis
, struct ata_taskfile
*tf
)
142 tf
->command
= fis
[2]; /* status */
143 tf
->feature
= fis
[3]; /* error */
150 tf
->hob_lbal
= fis
[8];
151 tf
->hob_lbam
= fis
[9];
152 tf
->hob_lbah
= fis
[10];
155 tf
->hob_nsect
= fis
[13];
158 static const u8 ata_rw_cmds
[] = {
162 ATA_CMD_READ_MULTI_EXT
,
163 ATA_CMD_WRITE_MULTI_EXT
,
167 ATA_CMD_WRITE_MULTI_FUA_EXT
,
171 ATA_CMD_PIO_READ_EXT
,
172 ATA_CMD_PIO_WRITE_EXT
,
185 ATA_CMD_WRITE_FUA_EXT
189 * ata_rwcmd_protocol - set taskfile r/w commands and protocol
190 * @qc: command to examine and configure
192 * Examine the device configuration and tf->flags to calculate
193 * the proper read/write commands and protocol to use.
198 int ata_rwcmd_protocol(struct ata_queued_cmd
*qc
)
200 struct ata_taskfile
*tf
= &qc
->tf
;
201 struct ata_device
*dev
= qc
->dev
;
204 int index
, fua
, lba48
, write
;
206 fua
= (tf
->flags
& ATA_TFLAG_FUA
) ? 4 : 0;
207 lba48
= (tf
->flags
& ATA_TFLAG_LBA48
) ? 2 : 0;
208 write
= (tf
->flags
& ATA_TFLAG_WRITE
) ? 1 : 0;
210 if (dev
->flags
& ATA_DFLAG_PIO
) {
211 tf
->protocol
= ATA_PROT_PIO
;
212 index
= dev
->multi_count
? 0 : 8;
213 } else if (lba48
&& (qc
->ap
->flags
& ATA_FLAG_PIO_LBA48
)) {
214 /* Unable to use DMA due to host limitation */
215 tf
->protocol
= ATA_PROT_PIO
;
216 index
= dev
->multi_count
? 0 : 8;
218 tf
->protocol
= ATA_PROT_DMA
;
222 cmd
= ata_rw_cmds
[index
+ fua
+ lba48
+ write
];
231 * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask
232 * @pio_mask: pio_mask
233 * @mwdma_mask: mwdma_mask
234 * @udma_mask: udma_mask
236 * Pack @pio_mask, @mwdma_mask and @udma_mask into a single
237 * unsigned int xfer_mask.
245 static unsigned int ata_pack_xfermask(unsigned int pio_mask
,
246 unsigned int mwdma_mask
,
247 unsigned int udma_mask
)
249 return ((pio_mask
<< ATA_SHIFT_PIO
) & ATA_MASK_PIO
) |
250 ((mwdma_mask
<< ATA_SHIFT_MWDMA
) & ATA_MASK_MWDMA
) |
251 ((udma_mask
<< ATA_SHIFT_UDMA
) & ATA_MASK_UDMA
);
255 * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks
256 * @xfer_mask: xfer_mask to unpack
257 * @pio_mask: resulting pio_mask
258 * @mwdma_mask: resulting mwdma_mask
259 * @udma_mask: resulting udma_mask
261 * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask.
262 * Any NULL distination masks will be ignored.
264 static void ata_unpack_xfermask(unsigned int xfer_mask
,
265 unsigned int *pio_mask
,
266 unsigned int *mwdma_mask
,
267 unsigned int *udma_mask
)
270 *pio_mask
= (xfer_mask
& ATA_MASK_PIO
) >> ATA_SHIFT_PIO
;
272 *mwdma_mask
= (xfer_mask
& ATA_MASK_MWDMA
) >> ATA_SHIFT_MWDMA
;
274 *udma_mask
= (xfer_mask
& ATA_MASK_UDMA
) >> ATA_SHIFT_UDMA
;
277 static const struct ata_xfer_ent
{
278 unsigned int shift
, bits
;
281 { ATA_SHIFT_PIO
, ATA_BITS_PIO
, XFER_PIO_0
},
282 { ATA_SHIFT_MWDMA
, ATA_BITS_MWDMA
, XFER_MW_DMA_0
},
283 { ATA_SHIFT_UDMA
, ATA_BITS_UDMA
, XFER_UDMA_0
},
288 * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask
289 * @xfer_mask: xfer_mask of interest
291 * Return matching XFER_* value for @xfer_mask. Only the highest
292 * bit of @xfer_mask is considered.
298 * Matching XFER_* value, 0 if no match found.
300 static u8
ata_xfer_mask2mode(unsigned int xfer_mask
)
302 int highbit
= fls(xfer_mask
) - 1;
303 const struct ata_xfer_ent
*ent
;
305 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
306 if (highbit
>= ent
->shift
&& highbit
< ent
->shift
+ ent
->bits
)
307 return ent
->base
+ highbit
- ent
->shift
;
312 * ata_xfer_mode2mask - Find matching xfer_mask for XFER_*
313 * @xfer_mode: XFER_* of interest
315 * Return matching xfer_mask for @xfer_mode.
321 * Matching xfer_mask, 0 if no match found.
323 static unsigned int ata_xfer_mode2mask(u8 xfer_mode
)
325 const struct ata_xfer_ent
*ent
;
327 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
328 if (xfer_mode
>= ent
->base
&& xfer_mode
< ent
->base
+ ent
->bits
)
329 return 1 << (ent
->shift
+ xfer_mode
- ent
->base
);
334 * ata_xfer_mode2shift - Find matching xfer_shift for XFER_*
335 * @xfer_mode: XFER_* of interest
337 * Return matching xfer_shift for @xfer_mode.
343 * Matching xfer_shift, -1 if no match found.
345 static int ata_xfer_mode2shift(unsigned int xfer_mode
)
347 const struct ata_xfer_ent
*ent
;
349 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
350 if (xfer_mode
>= ent
->base
&& xfer_mode
< ent
->base
+ ent
->bits
)
356 * ata_mode_string - convert xfer_mask to string
357 * @xfer_mask: mask of bits supported; only highest bit counts.
359 * Determine string which represents the highest speed
360 * (highest bit in @modemask).
366 * Constant C string representing highest speed listed in
367 * @mode_mask, or the constant C string "<n/a>".
369 static const char *ata_mode_string(unsigned int xfer_mask
)
371 static const char * const xfer_mode_str
[] = {
391 highbit
= fls(xfer_mask
) - 1;
392 if (highbit
>= 0 && highbit
< ARRAY_SIZE(xfer_mode_str
))
393 return xfer_mode_str
[highbit
];
398 * ata_pio_devchk - PATA device presence detection
399 * @ap: ATA channel to examine
400 * @device: Device to examine (starting at zero)
402 * This technique was originally described in
403 * Hale Landis's ATADRVR (www.ata-atapi.com), and
404 * later found its way into the ATA/ATAPI spec.
406 * Write a pattern to the ATA shadow registers,
407 * and if a device is present, it will respond by
408 * correctly storing and echoing back the
409 * ATA shadow register contents.
415 static unsigned int ata_pio_devchk(struct ata_port
*ap
,
418 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
421 ap
->ops
->dev_select(ap
, device
);
423 outb(0x55, ioaddr
->nsect_addr
);
424 outb(0xaa, ioaddr
->lbal_addr
);
426 outb(0xaa, ioaddr
->nsect_addr
);
427 outb(0x55, ioaddr
->lbal_addr
);
429 outb(0x55, ioaddr
->nsect_addr
);
430 outb(0xaa, ioaddr
->lbal_addr
);
432 nsect
= inb(ioaddr
->nsect_addr
);
433 lbal
= inb(ioaddr
->lbal_addr
);
435 if ((nsect
== 0x55) && (lbal
== 0xaa))
436 return 1; /* we found a device */
438 return 0; /* nothing found */
442 * ata_mmio_devchk - PATA device presence detection
443 * @ap: ATA channel to examine
444 * @device: Device to examine (starting at zero)
446 * This technique was originally described in
447 * Hale Landis's ATADRVR (www.ata-atapi.com), and
448 * later found its way into the ATA/ATAPI spec.
450 * Write a pattern to the ATA shadow registers,
451 * and if a device is present, it will respond by
452 * correctly storing and echoing back the
453 * ATA shadow register contents.
459 static unsigned int ata_mmio_devchk(struct ata_port
*ap
,
462 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
465 ap
->ops
->dev_select(ap
, device
);
467 writeb(0x55, (void __iomem
*) ioaddr
->nsect_addr
);
468 writeb(0xaa, (void __iomem
*) ioaddr
->lbal_addr
);
470 writeb(0xaa, (void __iomem
*) ioaddr
->nsect_addr
);
471 writeb(0x55, (void __iomem
*) ioaddr
->lbal_addr
);
473 writeb(0x55, (void __iomem
*) ioaddr
->nsect_addr
);
474 writeb(0xaa, (void __iomem
*) ioaddr
->lbal_addr
);
476 nsect
= readb((void __iomem
*) ioaddr
->nsect_addr
);
477 lbal
= readb((void __iomem
*) ioaddr
->lbal_addr
);
479 if ((nsect
== 0x55) && (lbal
== 0xaa))
480 return 1; /* we found a device */
482 return 0; /* nothing found */
486 * ata_devchk - PATA device presence detection
487 * @ap: ATA channel to examine
488 * @device: Device to examine (starting at zero)
490 * Dispatch ATA device presence detection, depending
491 * on whether we are using PIO or MMIO to talk to the
492 * ATA shadow registers.
498 static unsigned int ata_devchk(struct ata_port
*ap
,
501 if (ap
->flags
& ATA_FLAG_MMIO
)
502 return ata_mmio_devchk(ap
, device
);
503 return ata_pio_devchk(ap
, device
);
507 * ata_dev_classify - determine device type based on ATA-spec signature
508 * @tf: ATA taskfile register set for device to be identified
510 * Determine from taskfile register contents whether a device is
511 * ATA or ATAPI, as per "Signature and persistence" section
512 * of ATA/PI spec (volume 1, sect 5.14).
518 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, or %ATA_DEV_UNKNOWN
519 * the event of failure.
522 unsigned int ata_dev_classify(const struct ata_taskfile
*tf
)
524 /* Apple's open source Darwin code hints that some devices only
525 * put a proper signature into the LBA mid/high registers,
526 * So, we only check those. It's sufficient for uniqueness.
529 if (((tf
->lbam
== 0) && (tf
->lbah
== 0)) ||
530 ((tf
->lbam
== 0x3c) && (tf
->lbah
== 0xc3))) {
531 DPRINTK("found ATA device by sig\n");
535 if (((tf
->lbam
== 0x14) && (tf
->lbah
== 0xeb)) ||
536 ((tf
->lbam
== 0x69) && (tf
->lbah
== 0x96))) {
537 DPRINTK("found ATAPI device by sig\n");
538 return ATA_DEV_ATAPI
;
541 DPRINTK("unknown device\n");
542 return ATA_DEV_UNKNOWN
;
546 * ata_dev_try_classify - Parse returned ATA device signature
547 * @ap: ATA channel to examine
548 * @device: Device to examine (starting at zero)
549 * @r_err: Value of error register on completion
551 * After an event -- SRST, E.D.D., or SATA COMRESET -- occurs,
552 * an ATA/ATAPI-defined set of values is placed in the ATA
553 * shadow registers, indicating the results of device detection
556 * Select the ATA device, and read the values from the ATA shadow
557 * registers. Then parse according to the Error register value,
558 * and the spec-defined values examined by ata_dev_classify().
564 * Device type - %ATA_DEV_ATA, %ATA_DEV_ATAPI or %ATA_DEV_NONE.
568 ata_dev_try_classify(struct ata_port
*ap
, unsigned int device
, u8
*r_err
)
570 struct ata_taskfile tf
;
574 ap
->ops
->dev_select(ap
, device
);
576 memset(&tf
, 0, sizeof(tf
));
578 ap
->ops
->tf_read(ap
, &tf
);
583 /* see if device passed diags */
586 else if ((device
== 0) && (err
== 0x81))
591 /* determine if device is ATA or ATAPI */
592 class = ata_dev_classify(&tf
);
594 if (class == ATA_DEV_UNKNOWN
)
596 if ((class == ATA_DEV_ATA
) && (ata_chk_status(ap
) == 0))
602 * ata_id_string - Convert IDENTIFY DEVICE page into string
603 * @id: IDENTIFY DEVICE results we will examine
604 * @s: string into which data is output
605 * @ofs: offset into identify device page
606 * @len: length of string to return. must be an even number.
608 * The strings in the IDENTIFY DEVICE page are broken up into
609 * 16-bit chunks. Run through the string, and output each
610 * 8-bit chunk linearly, regardless of platform.
616 void ata_id_string(const u16
*id
, unsigned char *s
,
617 unsigned int ofs
, unsigned int len
)
636 * ata_id_c_string - Convert IDENTIFY DEVICE page into C string
637 * @id: IDENTIFY DEVICE results we will examine
638 * @s: string into which data is output
639 * @ofs: offset into identify device page
640 * @len: length of string to return. must be an odd number.
642 * This function is identical to ata_id_string except that it
643 * trims trailing spaces and terminates the resulting string with
644 * null. @len must be actual maximum length (even number) + 1.
649 void ata_id_c_string(const u16
*id
, unsigned char *s
,
650 unsigned int ofs
, unsigned int len
)
656 ata_id_string(id
, s
, ofs
, len
- 1);
658 p
= s
+ strnlen(s
, len
- 1);
659 while (p
> s
&& p
[-1] == ' ')
664 static u64
ata_id_n_sectors(const u16
*id
)
666 if (ata_id_has_lba(id
)) {
667 if (ata_id_has_lba48(id
))
668 return ata_id_u64(id
, 100);
670 return ata_id_u32(id
, 60);
672 if (ata_id_current_chs_valid(id
))
673 return ata_id_u32(id
, 57);
675 return id
[1] * id
[3] * id
[6];
680 * ata_noop_dev_select - Select device 0/1 on ATA bus
681 * @ap: ATA channel to manipulate
682 * @device: ATA device (numbered from zero) to select
684 * This function performs no actual function.
686 * May be used as the dev_select() entry in ata_port_operations.
691 void ata_noop_dev_select (struct ata_port
*ap
, unsigned int device
)
697 * ata_std_dev_select - Select device 0/1 on ATA bus
698 * @ap: ATA channel to manipulate
699 * @device: ATA device (numbered from zero) to select
701 * Use the method defined in the ATA specification to
702 * make either device 0, or device 1, active on the
703 * ATA channel. Works with both PIO and MMIO.
705 * May be used as the dev_select() entry in ata_port_operations.
711 void ata_std_dev_select (struct ata_port
*ap
, unsigned int device
)
716 tmp
= ATA_DEVICE_OBS
;
718 tmp
= ATA_DEVICE_OBS
| ATA_DEV1
;
720 if (ap
->flags
& ATA_FLAG_MMIO
) {
721 writeb(tmp
, (void __iomem
*) ap
->ioaddr
.device_addr
);
723 outb(tmp
, ap
->ioaddr
.device_addr
);
725 ata_pause(ap
); /* needed; also flushes, for mmio */
729 * ata_dev_select - Select device 0/1 on ATA bus
730 * @ap: ATA channel to manipulate
731 * @device: ATA device (numbered from zero) to select
732 * @wait: non-zero to wait for Status register BSY bit to clear
733 * @can_sleep: non-zero if context allows sleeping
735 * Use the method defined in the ATA specification to
736 * make either device 0, or device 1, active on the
739 * This is a high-level version of ata_std_dev_select(),
740 * which additionally provides the services of inserting
741 * the proper pauses and status polling, where needed.
747 void ata_dev_select(struct ata_port
*ap
, unsigned int device
,
748 unsigned int wait
, unsigned int can_sleep
)
750 VPRINTK("ENTER, ata%u: device %u, wait %u\n",
751 ap
->id
, device
, wait
);
756 ap
->ops
->dev_select(ap
, device
);
759 if (can_sleep
&& ap
->device
[device
].class == ATA_DEV_ATAPI
)
766 * ata_dump_id - IDENTIFY DEVICE info debugging output
767 * @id: IDENTIFY DEVICE page to dump
769 * Dump selected 16-bit words from the given IDENTIFY DEVICE
776 static inline void ata_dump_id(const u16
*id
)
778 DPRINTK("49==0x%04x "
788 DPRINTK("80==0x%04x "
798 DPRINTK("88==0x%04x "
805 * ata_id_xfermask - Compute xfermask from the given IDENTIFY data
806 * @id: IDENTIFY data to compute xfer mask from
808 * Compute the xfermask for this device. This is not as trivial
809 * as it seems if we must consider early devices correctly.
811 * FIXME: pre IDE drive timing (do we care ?).
819 static unsigned int ata_id_xfermask(const u16
*id
)
821 unsigned int pio_mask
, mwdma_mask
, udma_mask
;
823 /* Usual case. Word 53 indicates word 64 is valid */
824 if (id
[ATA_ID_FIELD_VALID
] & (1 << 1)) {
825 pio_mask
= id
[ATA_ID_PIO_MODES
] & 0x03;
829 /* If word 64 isn't valid then Word 51 high byte holds
830 * the PIO timing number for the maximum. Turn it into
833 pio_mask
= (2 << (id
[ATA_ID_OLD_PIO_MODES
] & 0xFF)) - 1 ;
835 /* But wait.. there's more. Design your standards by
836 * committee and you too can get a free iordy field to
837 * process. However its the speeds not the modes that
838 * are supported... Note drivers using the timing API
839 * will get this right anyway
843 mwdma_mask
= id
[ATA_ID_MWDMA_MODES
] & 0x07;
846 if (id
[ATA_ID_FIELD_VALID
] & (1 << 2))
847 udma_mask
= id
[ATA_ID_UDMA_MODES
] & 0xff;
849 return ata_pack_xfermask(pio_mask
, mwdma_mask
, udma_mask
);
853 * ata_port_queue_task - Queue port_task
854 * @ap: The ata_port to queue port_task for
856 * Schedule @fn(@data) for execution after @delay jiffies using
857 * port_task. There is one port_task per port and it's the
858 * user(low level driver)'s responsibility to make sure that only
859 * one task is active at any given time.
861 * libata core layer takes care of synchronization between
862 * port_task and EH. ata_port_queue_task() may be ignored for EH
866 * Inherited from caller.
868 void ata_port_queue_task(struct ata_port
*ap
, void (*fn
)(void *), void *data
,
873 if (ap
->flags
& ATA_FLAG_FLUSH_PORT_TASK
)
876 PREPARE_WORK(&ap
->port_task
, fn
, data
);
879 rc
= queue_work(ata_wq
, &ap
->port_task
);
881 rc
= queue_delayed_work(ata_wq
, &ap
->port_task
, delay
);
883 /* rc == 0 means that another user is using port task */
888 * ata_port_flush_task - Flush port_task
889 * @ap: The ata_port to flush port_task for
891 * After this function completes, port_task is guranteed not to
892 * be running or scheduled.
895 * Kernel thread context (may sleep)
897 void ata_port_flush_task(struct ata_port
*ap
)
903 spin_lock_irqsave(&ap
->host_set
->lock
, flags
);
904 ap
->flags
|= ATA_FLAG_FLUSH_PORT_TASK
;
905 spin_unlock_irqrestore(&ap
->host_set
->lock
, flags
);
907 DPRINTK("flush #1\n");
908 flush_workqueue(ata_wq
);
911 * At this point, if a task is running, it's guaranteed to see
912 * the FLUSH flag; thus, it will never queue pio tasks again.
915 if (!cancel_delayed_work(&ap
->port_task
)) {
916 DPRINTK("flush #2\n");
917 flush_workqueue(ata_wq
);
920 spin_lock_irqsave(&ap
->host_set
->lock
, flags
);
921 ap
->flags
&= ~ATA_FLAG_FLUSH_PORT_TASK
;
922 spin_unlock_irqrestore(&ap
->host_set
->lock
, flags
);
927 void ata_qc_complete_internal(struct ata_queued_cmd
*qc
)
929 struct completion
*waiting
= qc
->private_data
;
931 qc
->ap
->ops
->tf_read(qc
->ap
, &qc
->tf
);
936 * ata_exec_internal - execute libata internal command
937 * @ap: Port to which the command is sent
938 * @dev: Device to which the command is sent
939 * @tf: Taskfile registers for the command and the result
940 * @dma_dir: Data tranfer direction of the command
941 * @buf: Data buffer of the command
942 * @buflen: Length of data buffer
944 * Executes libata internal command with timeout. @tf contains
945 * command on entry and result on return. Timeout and error
946 * conditions are reported via return value. No recovery action
947 * is taken after a command times out. It's caller's duty to
948 * clean up after timeout.
951 * None. Should be called with kernel context, might sleep.
955 ata_exec_internal(struct ata_port
*ap
, struct ata_device
*dev
,
956 struct ata_taskfile
*tf
,
957 int dma_dir
, void *buf
, unsigned int buflen
)
959 u8 command
= tf
->command
;
960 struct ata_queued_cmd
*qc
;
961 DECLARE_COMPLETION(wait
);
963 unsigned int err_mask
;
965 spin_lock_irqsave(&ap
->host_set
->lock
, flags
);
967 qc
= ata_qc_new_init(ap
, dev
);
971 qc
->dma_dir
= dma_dir
;
972 if (dma_dir
!= DMA_NONE
) {
973 ata_sg_init_one(qc
, buf
, buflen
);
974 qc
->nsect
= buflen
/ ATA_SECT_SIZE
;
977 qc
->private_data
= &wait
;
978 qc
->complete_fn
= ata_qc_complete_internal
;
980 qc
->err_mask
= ata_qc_issue(qc
);
984 spin_unlock_irqrestore(&ap
->host_set
->lock
, flags
);
986 if (!wait_for_completion_timeout(&wait
, ATA_TMOUT_INTERNAL
)) {
987 ata_port_flush_task(ap
);
989 spin_lock_irqsave(&ap
->host_set
->lock
, flags
);
991 /* We're racing with irq here. If we lose, the
992 * following test prevents us from completing the qc
993 * again. If completion irq occurs after here but
994 * before the caller cleans up, it will result in a
995 * spurious interrupt. We can live with that.
997 if (qc
->flags
& ATA_QCFLAG_ACTIVE
) {
998 qc
->err_mask
= AC_ERR_TIMEOUT
;
1000 printk(KERN_WARNING
"ata%u: qc timeout (cmd 0x%x)\n",
1004 spin_unlock_irqrestore(&ap
->host_set
->lock
, flags
);
1008 err_mask
= qc
->err_mask
;
1016 * ata_pio_need_iordy - check if iordy needed
1019 * Check if the current speed of the device requires IORDY. Used
1020 * by various controllers for chip configuration.
1023 unsigned int ata_pio_need_iordy(const struct ata_device
*adev
)
1026 int speed
= adev
->pio_mode
- XFER_PIO_0
;
1033 /* If we have no drive specific rule, then PIO 2 is non IORDY */
1035 if (adev
->id
[ATA_ID_FIELD_VALID
] & 2) { /* EIDE */
1036 pio
= adev
->id
[ATA_ID_EIDE_PIO
];
1037 /* Is the speed faster than the drive allows non IORDY ? */
1039 /* This is cycle times not frequency - watch the logic! */
1040 if (pio
> 240) /* PIO2 is 240nS per cycle */
1049 * ata_dev_read_id - Read ID data from the specified device
1050 * @ap: port on which target device resides
1051 * @dev: target device
1052 * @p_class: pointer to class of the target device (may be changed)
1053 * @post_reset: is this read ID post-reset?
1054 * @p_id: read IDENTIFY page (newly allocated)
1056 * Read ID data from the specified device. ATA_CMD_ID_ATA is
1057 * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
1058 * devices. This function also takes care of EDD signature
1059 * misreporting (to be removed once EDD support is gone) and
1060 * issues ATA_CMD_INIT_DEV_PARAMS for pre-ATA4 drives.
1063 * Kernel thread context (may sleep)
1066 * 0 on success, -errno otherwise.
1068 static int ata_dev_read_id(struct ata_port
*ap
, struct ata_device
*dev
,
1069 unsigned int *p_class
, int post_reset
, u16
**p_id
)
1071 unsigned int class = *p_class
;
1072 unsigned int using_edd
;
1073 struct ata_taskfile tf
;
1074 unsigned int err_mask
= 0;
1079 DPRINTK("ENTER, host %u, dev %u\n", ap
->id
, dev
->devno
);
1081 if (ap
->ops
->probe_reset
||
1082 ap
->flags
& (ATA_FLAG_SRST
| ATA_FLAG_SATA_RESET
))
1087 ata_dev_select(ap
, dev
->devno
, 1, 1); /* select device 0/1 */
1089 id
= kmalloc(sizeof(id
[0]) * ATA_ID_WORDS
, GFP_KERNEL
);
1092 reason
= "out of memory";
1097 ata_tf_init(ap
, &tf
, dev
->devno
);
1101 tf
.command
= ATA_CMD_ID_ATA
;
1104 tf
.command
= ATA_CMD_ID_ATAPI
;
1108 reason
= "unsupported class";
1112 tf
.protocol
= ATA_PROT_PIO
;
1114 err_mask
= ata_exec_internal(ap
, dev
, &tf
, DMA_FROM_DEVICE
,
1115 id
, sizeof(id
[0]) * ATA_ID_WORDS
);
1119 reason
= "I/O error";
1121 if (err_mask
& ~AC_ERR_DEV
)
1125 * arg! EDD works for all test cases, but seems to return
1126 * the ATA signature for some ATAPI devices. Until the
1127 * reason for this is found and fixed, we fix up the mess
1128 * here. If IDENTIFY DEVICE returns command aborted
1129 * (as ATAPI devices do), then we issue an
1130 * IDENTIFY PACKET DEVICE.
1132 * ATA software reset (SRST, the default) does not appear
1133 * to have this problem.
1135 if ((using_edd
) && (class == ATA_DEV_ATA
)) {
1136 u8 err
= tf
.feature
;
1137 if (err
& ATA_ABORTED
) {
1138 class = ATA_DEV_ATAPI
;
1145 swap_buf_le16(id
, ATA_ID_WORDS
);
1148 if ((class == ATA_DEV_ATA
) != ata_id_is_ata(id
)) {
1150 reason
= "device reports illegal type";
1154 if (post_reset
&& class == ATA_DEV_ATA
) {
1156 * The exact sequence expected by certain pre-ATA4 drives is:
1159 * INITIALIZE DEVICE PARAMETERS
1161 * Some drives were very specific about that exact sequence.
1163 if (ata_id_major_version(id
) < 4 || !ata_id_has_lba(id
)) {
1164 err_mask
= ata_dev_init_params(ap
, dev
);
1167 reason
= "INIT_DEV_PARAMS failed";
1171 /* current CHS translation info (id[53-58]) might be
1172 * changed. reread the identify device info.
1184 printk(KERN_WARNING
"ata%u: dev %u failed to IDENTIFY (%s)\n",
1185 ap
->id
, dev
->devno
, reason
);
1190 static inline u8
ata_dev_knobble(const struct ata_port
*ap
,
1191 struct ata_device
*dev
)
1193 return ((ap
->cbl
== ATA_CBL_SATA
) && (!ata_id_is_sata(dev
->id
)));
1197 * ata_dev_configure - Configure the specified ATA/ATAPI device
1198 * @ap: Port on which target device resides
1199 * @dev: Target device to configure
1200 * @print_info: Enable device info printout
1202 * Configure @dev according to @dev->id. Generic and low-level
1203 * driver specific fixups are also applied.
1206 * Kernel thread context (may sleep)
1209 * 0 on success, -errno otherwise
1211 static int ata_dev_configure(struct ata_port
*ap
, struct ata_device
*dev
,
1214 const u16
*id
= dev
->id
;
1215 unsigned int xfer_mask
;
1218 if (!ata_dev_present(dev
)) {
1219 DPRINTK("ENTER/EXIT (host %u, dev %u) -- nodev\n",
1220 ap
->id
, dev
->devno
);
1224 DPRINTK("ENTER, host %u, dev %u\n", ap
->id
, dev
->devno
);
1226 /* print device capabilities */
1228 printk(KERN_DEBUG
"ata%u: dev %u cfg 49:%04x 82:%04x 83:%04x "
1229 "84:%04x 85:%04x 86:%04x 87:%04x 88:%04x\n",
1230 ap
->id
, dev
->devno
, id
[49], id
[82], id
[83],
1231 id
[84], id
[85], id
[86], id
[87], id
[88]);
1233 /* initialize to-be-configured parameters */
1235 dev
->max_sectors
= 0;
1243 * common ATA, ATAPI feature tests
1246 /* find max transfer mode; for printk only */
1247 xfer_mask
= ata_id_xfermask(id
);
1251 /* ATA-specific feature tests */
1252 if (dev
->class == ATA_DEV_ATA
) {
1253 dev
->n_sectors
= ata_id_n_sectors(id
);
1255 if (ata_id_has_lba(id
)) {
1256 const char *lba_desc
;
1259 dev
->flags
|= ATA_DFLAG_LBA
;
1260 if (ata_id_has_lba48(id
)) {
1261 dev
->flags
|= ATA_DFLAG_LBA48
;
1265 /* print device info to dmesg */
1267 printk(KERN_INFO
"ata%u: dev %u ATA-%d, "
1268 "max %s, %Lu sectors: %s\n",
1270 ata_id_major_version(id
),
1271 ata_mode_string(xfer_mask
),
1272 (unsigned long long)dev
->n_sectors
,
1277 /* Default translation */
1278 dev
->cylinders
= id
[1];
1280 dev
->sectors
= id
[6];
1282 if (ata_id_current_chs_valid(id
)) {
1283 /* Current CHS translation is valid. */
1284 dev
->cylinders
= id
[54];
1285 dev
->heads
= id
[55];
1286 dev
->sectors
= id
[56];
1289 /* print device info to dmesg */
1291 printk(KERN_INFO
"ata%u: dev %u ATA-%d, "
1292 "max %s, %Lu sectors: CHS %u/%u/%u\n",
1294 ata_id_major_version(id
),
1295 ata_mode_string(xfer_mask
),
1296 (unsigned long long)dev
->n_sectors
,
1297 dev
->cylinders
, dev
->heads
, dev
->sectors
);
1303 /* ATAPI-specific feature tests */
1304 else if (dev
->class == ATA_DEV_ATAPI
) {
1305 rc
= atapi_cdb_len(id
);
1306 if ((rc
< 12) || (rc
> ATAPI_CDB_LEN
)) {
1307 printk(KERN_WARNING
"ata%u: unsupported CDB len\n", ap
->id
);
1311 dev
->cdb_len
= (unsigned int) rc
;
1313 /* print device info to dmesg */
1315 printk(KERN_INFO
"ata%u: dev %u ATAPI, max %s\n",
1316 ap
->id
, dev
->devno
, ata_mode_string(xfer_mask
));
1319 ap
->host
->max_cmd_len
= 0;
1320 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
1321 ap
->host
->max_cmd_len
= max_t(unsigned int,
1322 ap
->host
->max_cmd_len
,
1323 ap
->device
[i
].cdb_len
);
1325 /* limit bridge transfers to udma5, 200 sectors */
1326 if (ata_dev_knobble(ap
, dev
)) {
1328 printk(KERN_INFO
"ata%u(%u): applying bridge limits\n",
1329 ap
->id
, dev
->devno
);
1330 ap
->udma_mask
&= ATA_UDMA5
;
1331 dev
->max_sectors
= ATA_MAX_SECTORS
;
1334 if (ap
->ops
->dev_config
)
1335 ap
->ops
->dev_config(ap
, dev
);
1337 DPRINTK("EXIT, drv_stat = 0x%x\n", ata_chk_status(ap
));
1341 printk(KERN_WARNING
"ata%u: dev %u not supported, ignoring\n",
1342 ap
->id
, dev
->devno
);
1343 DPRINTK("EXIT, err\n");
1348 * ata_bus_probe - Reset and probe ATA bus
1351 * Master ATA bus probing function. Initiates a hardware-dependent
1352 * bus reset, then attempts to identify any devices found on
1356 * PCI/etc. bus probe sem.
1359 * Zero on success, non-zero on error.
1362 static int ata_bus_probe(struct ata_port
*ap
)
1364 unsigned int classes
[ATA_MAX_DEVICES
];
1365 unsigned int i
, rc
, found
= 0;
1369 /* reset and determine device classes */
1370 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
1371 classes
[i
] = ATA_DEV_UNKNOWN
;
1373 if (ap
->ops
->probe_reset
) {
1374 rc
= ap
->ops
->probe_reset(ap
, classes
);
1376 printk("ata%u: reset failed (errno=%d)\n", ap
->id
, rc
);
1380 ap
->ops
->phy_reset(ap
);
1382 if (!(ap
->flags
& ATA_FLAG_PORT_DISABLED
))
1383 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
1384 classes
[i
] = ap
->device
[i
].class;
1389 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
1390 if (classes
[i
] == ATA_DEV_UNKNOWN
)
1391 classes
[i
] = ATA_DEV_NONE
;
1393 /* read IDENTIFY page and configure devices */
1394 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
1395 struct ata_device
*dev
= &ap
->device
[i
];
1397 dev
->class = classes
[i
];
1399 if (!ata_dev_present(dev
))
1402 WARN_ON(dev
->id
!= NULL
);
1403 if (ata_dev_read_id(ap
, dev
, &dev
->class, 1, &dev
->id
)) {
1404 dev
->class = ATA_DEV_NONE
;
1408 if (ata_dev_configure(ap
, dev
, 1)) {
1409 dev
->class++; /* disable device */
1417 goto err_out_disable
;
1420 if (ap
->flags
& ATA_FLAG_PORT_DISABLED
)
1421 goto err_out_disable
;
1426 ap
->ops
->port_disable(ap
);
1431 * ata_port_probe - Mark port as enabled
1432 * @ap: Port for which we indicate enablement
1434 * Modify @ap data structure such that the system
1435 * thinks that the entire port is enabled.
1437 * LOCKING: host_set lock, or some other form of
1441 void ata_port_probe(struct ata_port
*ap
)
1443 ap
->flags
&= ~ATA_FLAG_PORT_DISABLED
;
1447 * sata_print_link_status - Print SATA link status
1448 * @ap: SATA port to printk link status about
1450 * This function prints link speed and status of a SATA link.
1455 static void sata_print_link_status(struct ata_port
*ap
)
1460 if (!ap
->ops
->scr_read
)
1463 sstatus
= scr_read(ap
, SCR_STATUS
);
1465 if (sata_dev_present(ap
)) {
1466 tmp
= (sstatus
>> 4) & 0xf;
1469 else if (tmp
& (1 << 1))
1472 speed
= "<unknown>";
1473 printk(KERN_INFO
"ata%u: SATA link up %s Gbps (SStatus %X)\n",
1474 ap
->id
, speed
, sstatus
);
1476 printk(KERN_INFO
"ata%u: SATA link down (SStatus %X)\n",
1482 * __sata_phy_reset - Wake/reset a low-level SATA PHY
1483 * @ap: SATA port associated with target SATA PHY.
1485 * This function issues commands to standard SATA Sxxx
1486 * PHY registers, to wake up the phy (and device), and
1487 * clear any reset condition.
1490 * PCI/etc. bus probe sem.
1493 void __sata_phy_reset(struct ata_port
*ap
)
1496 unsigned long timeout
= jiffies
+ (HZ
* 5);
1498 if (ap
->flags
& ATA_FLAG_SATA_RESET
) {
1499 /* issue phy wake/reset */
1500 scr_write_flush(ap
, SCR_CONTROL
, 0x301);
1501 /* Couldn't find anything in SATA I/II specs, but
1502 * AHCI-1.1 10.4.2 says at least 1 ms. */
1505 scr_write_flush(ap
, SCR_CONTROL
, 0x300); /* phy wake/clear reset */
1507 /* wait for phy to become ready, if necessary */
1510 sstatus
= scr_read(ap
, SCR_STATUS
);
1511 if ((sstatus
& 0xf) != 1)
1513 } while (time_before(jiffies
, timeout
));
1515 /* print link status */
1516 sata_print_link_status(ap
);
1518 /* TODO: phy layer with polling, timeouts, etc. */
1519 if (sata_dev_present(ap
))
1522 ata_port_disable(ap
);
1524 if (ap
->flags
& ATA_FLAG_PORT_DISABLED
)
1527 if (ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
)) {
1528 ata_port_disable(ap
);
1532 ap
->cbl
= ATA_CBL_SATA
;
1536 * sata_phy_reset - Reset SATA bus.
1537 * @ap: SATA port associated with target SATA PHY.
1539 * This function resets the SATA bus, and then probes
1540 * the bus for devices.
1543 * PCI/etc. bus probe sem.
1546 void sata_phy_reset(struct ata_port
*ap
)
1548 __sata_phy_reset(ap
);
1549 if (ap
->flags
& ATA_FLAG_PORT_DISABLED
)
1555 * ata_port_disable - Disable port.
1556 * @ap: Port to be disabled.
1558 * Modify @ap data structure such that the system
1559 * thinks that the entire port is disabled, and should
1560 * never attempt to probe or communicate with devices
1563 * LOCKING: host_set lock, or some other form of
1567 void ata_port_disable(struct ata_port
*ap
)
1569 ap
->device
[0].class = ATA_DEV_NONE
;
1570 ap
->device
[1].class = ATA_DEV_NONE
;
1571 ap
->flags
|= ATA_FLAG_PORT_DISABLED
;
1575 * This mode timing computation functionality is ported over from
1576 * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik
1579 * PIO 0-5, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
1580 * These were taken from ATA/ATAPI-6 standard, rev 0a, except
1581 * for PIO 5, which is a nonstandard extension and UDMA6, which
1582 * is currently supported only by Maxtor drives.
1585 static const struct ata_timing ata_timing
[] = {
1587 { XFER_UDMA_6
, 0, 0, 0, 0, 0, 0, 0, 15 },
1588 { XFER_UDMA_5
, 0, 0, 0, 0, 0, 0, 0, 20 },
1589 { XFER_UDMA_4
, 0, 0, 0, 0, 0, 0, 0, 30 },
1590 { XFER_UDMA_3
, 0, 0, 0, 0, 0, 0, 0, 45 },
1592 { XFER_UDMA_2
, 0, 0, 0, 0, 0, 0, 0, 60 },
1593 { XFER_UDMA_1
, 0, 0, 0, 0, 0, 0, 0, 80 },
1594 { XFER_UDMA_0
, 0, 0, 0, 0, 0, 0, 0, 120 },
1596 /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */
1598 { XFER_MW_DMA_2
, 25, 0, 0, 0, 70, 25, 120, 0 },
1599 { XFER_MW_DMA_1
, 45, 0, 0, 0, 80, 50, 150, 0 },
1600 { XFER_MW_DMA_0
, 60, 0, 0, 0, 215, 215, 480, 0 },
1602 { XFER_SW_DMA_2
, 60, 0, 0, 0, 120, 120, 240, 0 },
1603 { XFER_SW_DMA_1
, 90, 0, 0, 0, 240, 240, 480, 0 },
1604 { XFER_SW_DMA_0
, 120, 0, 0, 0, 480, 480, 960, 0 },
1606 /* { XFER_PIO_5, 20, 50, 30, 100, 50, 30, 100, 0 }, */
1607 { XFER_PIO_4
, 25, 70, 25, 120, 70, 25, 120, 0 },
1608 { XFER_PIO_3
, 30, 80, 70, 180, 80, 70, 180, 0 },
1610 { XFER_PIO_2
, 30, 290, 40, 330, 100, 90, 240, 0 },
1611 { XFER_PIO_1
, 50, 290, 93, 383, 125, 100, 383, 0 },
1612 { XFER_PIO_0
, 70, 290, 240, 600, 165, 150, 600, 0 },
1614 /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */
1619 #define ENOUGH(v,unit) (((v)-1)/(unit)+1)
1620 #define EZ(v,unit) ((v)?ENOUGH(v,unit):0)
1622 static void ata_timing_quantize(const struct ata_timing
*t
, struct ata_timing
*q
, int T
, int UT
)
1624 q
->setup
= EZ(t
->setup
* 1000, T
);
1625 q
->act8b
= EZ(t
->act8b
* 1000, T
);
1626 q
->rec8b
= EZ(t
->rec8b
* 1000, T
);
1627 q
->cyc8b
= EZ(t
->cyc8b
* 1000, T
);
1628 q
->active
= EZ(t
->active
* 1000, T
);
1629 q
->recover
= EZ(t
->recover
* 1000, T
);
1630 q
->cycle
= EZ(t
->cycle
* 1000, T
);
1631 q
->udma
= EZ(t
->udma
* 1000, UT
);
1634 void ata_timing_merge(const struct ata_timing
*a
, const struct ata_timing
*b
,
1635 struct ata_timing
*m
, unsigned int what
)
1637 if (what
& ATA_TIMING_SETUP
) m
->setup
= max(a
->setup
, b
->setup
);
1638 if (what
& ATA_TIMING_ACT8B
) m
->act8b
= max(a
->act8b
, b
->act8b
);
1639 if (what
& ATA_TIMING_REC8B
) m
->rec8b
= max(a
->rec8b
, b
->rec8b
);
1640 if (what
& ATA_TIMING_CYC8B
) m
->cyc8b
= max(a
->cyc8b
, b
->cyc8b
);
1641 if (what
& ATA_TIMING_ACTIVE
) m
->active
= max(a
->active
, b
->active
);
1642 if (what
& ATA_TIMING_RECOVER
) m
->recover
= max(a
->recover
, b
->recover
);
1643 if (what
& ATA_TIMING_CYCLE
) m
->cycle
= max(a
->cycle
, b
->cycle
);
1644 if (what
& ATA_TIMING_UDMA
) m
->udma
= max(a
->udma
, b
->udma
);
1647 static const struct ata_timing
* ata_timing_find_mode(unsigned short speed
)
1649 const struct ata_timing
*t
;
1651 for (t
= ata_timing
; t
->mode
!= speed
; t
++)
1652 if (t
->mode
== 0xFF)
1657 int ata_timing_compute(struct ata_device
*adev
, unsigned short speed
,
1658 struct ata_timing
*t
, int T
, int UT
)
1660 const struct ata_timing
*s
;
1661 struct ata_timing p
;
1667 if (!(s
= ata_timing_find_mode(speed
)))
1670 memcpy(t
, s
, sizeof(*s
));
1673 * If the drive is an EIDE drive, it can tell us it needs extended
1674 * PIO/MW_DMA cycle timing.
1677 if (adev
->id
[ATA_ID_FIELD_VALID
] & 2) { /* EIDE drive */
1678 memset(&p
, 0, sizeof(p
));
1679 if(speed
>= XFER_PIO_0
&& speed
<= XFER_SW_DMA_0
) {
1680 if (speed
<= XFER_PIO_2
) p
.cycle
= p
.cyc8b
= adev
->id
[ATA_ID_EIDE_PIO
];
1681 else p
.cycle
= p
.cyc8b
= adev
->id
[ATA_ID_EIDE_PIO_IORDY
];
1682 } else if(speed
>= XFER_MW_DMA_0
&& speed
<= XFER_MW_DMA_2
) {
1683 p
.cycle
= adev
->id
[ATA_ID_EIDE_DMA_MIN
];
1685 ata_timing_merge(&p
, t
, t
, ATA_TIMING_CYCLE
| ATA_TIMING_CYC8B
);
1689 * Convert the timing to bus clock counts.
1692 ata_timing_quantize(t
, t
, T
, UT
);
1695 * Even in DMA/UDMA modes we still use PIO access for IDENTIFY,
1696 * S.M.A.R.T * and some other commands. We have to ensure that the
1697 * DMA cycle timing is slower/equal than the fastest PIO timing.
1700 if (speed
> XFER_PIO_4
) {
1701 ata_timing_compute(adev
, adev
->pio_mode
, &p
, T
, UT
);
1702 ata_timing_merge(&p
, t
, t
, ATA_TIMING_ALL
);
1706 * Lengthen active & recovery time so that cycle time is correct.
1709 if (t
->act8b
+ t
->rec8b
< t
->cyc8b
) {
1710 t
->act8b
+= (t
->cyc8b
- (t
->act8b
+ t
->rec8b
)) / 2;
1711 t
->rec8b
= t
->cyc8b
- t
->act8b
;
1714 if (t
->active
+ t
->recover
< t
->cycle
) {
1715 t
->active
+= (t
->cycle
- (t
->active
+ t
->recover
)) / 2;
1716 t
->recover
= t
->cycle
- t
->active
;
1722 static void ata_dev_set_mode(struct ata_port
*ap
, struct ata_device
*dev
)
1724 if (!ata_dev_present(dev
) || (ap
->flags
& ATA_FLAG_PORT_DISABLED
))
1727 if (dev
->xfer_shift
== ATA_SHIFT_PIO
)
1728 dev
->flags
|= ATA_DFLAG_PIO
;
1730 ata_dev_set_xfermode(ap
, dev
);
1732 if (ata_dev_revalidate(ap
, dev
, 0)) {
1733 printk(KERN_ERR
"ata%u: failed to revalidate after set "
1734 "xfermode, disabled\n", ap
->id
);
1735 ata_port_disable(ap
);
1738 DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
1739 dev
->xfer_shift
, (int)dev
->xfer_mode
);
1741 printk(KERN_INFO
"ata%u: dev %u configured for %s\n",
1743 ata_mode_string(ata_xfer_mode2mask(dev
->xfer_mode
)));
1746 static int ata_host_set_pio(struct ata_port
*ap
)
1750 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
1751 struct ata_device
*dev
= &ap
->device
[i
];
1753 if (!ata_dev_present(dev
))
1756 if (!dev
->pio_mode
) {
1757 printk(KERN_WARNING
"ata%u: no PIO support for device %d.\n", ap
->id
, i
);
1761 dev
->xfer_mode
= dev
->pio_mode
;
1762 dev
->xfer_shift
= ATA_SHIFT_PIO
;
1763 if (ap
->ops
->set_piomode
)
1764 ap
->ops
->set_piomode(ap
, dev
);
1770 static void ata_host_set_dma(struct ata_port
*ap
)
1774 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
1775 struct ata_device
*dev
= &ap
->device
[i
];
1777 if (!ata_dev_present(dev
) || !dev
->dma_mode
)
1780 dev
->xfer_mode
= dev
->dma_mode
;
1781 dev
->xfer_shift
= ata_xfer_mode2shift(dev
->dma_mode
);
1782 if (ap
->ops
->set_dmamode
)
1783 ap
->ops
->set_dmamode(ap
, dev
);
1788 * ata_set_mode - Program timings and issue SET FEATURES - XFER
1789 * @ap: port on which timings will be programmed
1791 * Set ATA device disk transfer mode (PIO3, UDMA6, etc.).
1794 * PCI/etc. bus probe sem.
1796 static void ata_set_mode(struct ata_port
*ap
)
1800 /* step 1: calculate xfer_mask */
1801 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
1802 struct ata_device
*dev
= &ap
->device
[i
];
1803 unsigned int pio_mask
, dma_mask
;
1805 if (!ata_dev_present(dev
))
1808 ata_dev_xfermask(ap
, dev
);
1810 /* TODO: let LLDD filter dev->*_mask here */
1812 pio_mask
= ata_pack_xfermask(dev
->pio_mask
, 0, 0);
1813 dma_mask
= ata_pack_xfermask(0, dev
->mwdma_mask
, dev
->udma_mask
);
1814 dev
->pio_mode
= ata_xfer_mask2mode(pio_mask
);
1815 dev
->dma_mode
= ata_xfer_mask2mode(dma_mask
);
1818 /* step 2: always set host PIO timings */
1819 rc
= ata_host_set_pio(ap
);
1823 /* step 3: set host DMA timings */
1824 ata_host_set_dma(ap
);
1826 /* step 4: update devices' xfer mode */
1827 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
1828 ata_dev_set_mode(ap
, &ap
->device
[i
]);
1830 if (ap
->flags
& ATA_FLAG_PORT_DISABLED
)
1833 if (ap
->ops
->post_set_mode
)
1834 ap
->ops
->post_set_mode(ap
);
1839 ata_port_disable(ap
);
1843 * ata_tf_to_host - issue ATA taskfile to host controller
1844 * @ap: port to which command is being issued
1845 * @tf: ATA taskfile register set
1847 * Issues ATA taskfile register set to ATA host controller,
1848 * with proper synchronization with interrupt handler and
1852 * spin_lock_irqsave(host_set lock)
1855 static inline void ata_tf_to_host(struct ata_port
*ap
,
1856 const struct ata_taskfile
*tf
)
1858 ap
->ops
->tf_load(ap
, tf
);
1859 ap
->ops
->exec_command(ap
, tf
);
1863 * ata_busy_sleep - sleep until BSY clears, or timeout
1864 * @ap: port containing status register to be polled
1865 * @tmout_pat: impatience timeout
1866 * @tmout: overall timeout
1868 * Sleep until ATA Status register bit BSY clears,
1869 * or a timeout occurs.
1874 unsigned int ata_busy_sleep (struct ata_port
*ap
,
1875 unsigned long tmout_pat
, unsigned long tmout
)
1877 unsigned long timer_start
, timeout
;
1880 status
= ata_busy_wait(ap
, ATA_BUSY
, 300);
1881 timer_start
= jiffies
;
1882 timeout
= timer_start
+ tmout_pat
;
1883 while ((status
& ATA_BUSY
) && (time_before(jiffies
, timeout
))) {
1885 status
= ata_busy_wait(ap
, ATA_BUSY
, 3);
1888 if (status
& ATA_BUSY
)
1889 printk(KERN_WARNING
"ata%u is slow to respond, "
1890 "please be patient\n", ap
->id
);
1892 timeout
= timer_start
+ tmout
;
1893 while ((status
& ATA_BUSY
) && (time_before(jiffies
, timeout
))) {
1895 status
= ata_chk_status(ap
);
1898 if (status
& ATA_BUSY
) {
1899 printk(KERN_ERR
"ata%u failed to respond (%lu secs)\n",
1900 ap
->id
, tmout
/ HZ
);
1907 static void ata_bus_post_reset(struct ata_port
*ap
, unsigned int devmask
)
1909 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
1910 unsigned int dev0
= devmask
& (1 << 0);
1911 unsigned int dev1
= devmask
& (1 << 1);
1912 unsigned long timeout
;
1914 /* if device 0 was found in ata_devchk, wait for its
1918 ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
);
1920 /* if device 1 was found in ata_devchk, wait for
1921 * register access, then wait for BSY to clear
1923 timeout
= jiffies
+ ATA_TMOUT_BOOT
;
1927 ap
->ops
->dev_select(ap
, 1);
1928 if (ap
->flags
& ATA_FLAG_MMIO
) {
1929 nsect
= readb((void __iomem
*) ioaddr
->nsect_addr
);
1930 lbal
= readb((void __iomem
*) ioaddr
->lbal_addr
);
1932 nsect
= inb(ioaddr
->nsect_addr
);
1933 lbal
= inb(ioaddr
->lbal_addr
);
1935 if ((nsect
== 1) && (lbal
== 1))
1937 if (time_after(jiffies
, timeout
)) {
1941 msleep(50); /* give drive a breather */
1944 ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
);
1946 /* is all this really necessary? */
1947 ap
->ops
->dev_select(ap
, 0);
1949 ap
->ops
->dev_select(ap
, 1);
1951 ap
->ops
->dev_select(ap
, 0);
1955 * ata_bus_edd - Issue EXECUTE DEVICE DIAGNOSTIC command.
1956 * @ap: Port to reset and probe
1958 * Use the EXECUTE DEVICE DIAGNOSTIC command to reset and
1959 * probe the bus. Not often used these days.
1962 * PCI/etc. bus probe sem.
1963 * Obtains host_set lock.
1967 static unsigned int ata_bus_edd(struct ata_port
*ap
)
1969 struct ata_taskfile tf
;
1970 unsigned long flags
;
1972 /* set up execute-device-diag (bus reset) taskfile */
1973 /* also, take interrupts to a known state (disabled) */
1974 DPRINTK("execute-device-diag\n");
1975 ata_tf_init(ap
, &tf
, 0);
1977 tf
.command
= ATA_CMD_EDD
;
1978 tf
.protocol
= ATA_PROT_NODATA
;
1981 spin_lock_irqsave(&ap
->host_set
->lock
, flags
);
1982 ata_tf_to_host(ap
, &tf
);
1983 spin_unlock_irqrestore(&ap
->host_set
->lock
, flags
);
1985 /* spec says at least 2ms. but who knows with those
1986 * crazy ATAPI devices...
1990 return ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
);
1993 static unsigned int ata_bus_softreset(struct ata_port
*ap
,
1994 unsigned int devmask
)
1996 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
1998 DPRINTK("ata%u: bus reset via SRST\n", ap
->id
);
2000 /* software reset. causes dev0 to be selected */
2001 if (ap
->flags
& ATA_FLAG_MMIO
) {
2002 writeb(ap
->ctl
, (void __iomem
*) ioaddr
->ctl_addr
);
2003 udelay(20); /* FIXME: flush */
2004 writeb(ap
->ctl
| ATA_SRST
, (void __iomem
*) ioaddr
->ctl_addr
);
2005 udelay(20); /* FIXME: flush */
2006 writeb(ap
->ctl
, (void __iomem
*) ioaddr
->ctl_addr
);
2008 outb(ap
->ctl
, ioaddr
->ctl_addr
);
2010 outb(ap
->ctl
| ATA_SRST
, ioaddr
->ctl_addr
);
2012 outb(ap
->ctl
, ioaddr
->ctl_addr
);
2015 /* spec mandates ">= 2ms" before checking status.
2016 * We wait 150ms, because that was the magic delay used for
2017 * ATAPI devices in Hale Landis's ATADRVR, for the period of time
2018 * between when the ATA command register is written, and then
2019 * status is checked. Because waiting for "a while" before
2020 * checking status is fine, post SRST, we perform this magic
2021 * delay here as well.
2023 * Old drivers/ide uses the 2mS rule and then waits for ready
2028 /* Before we perform post reset processing we want to see if
2029 the bus shows 0xFF because the odd clown forgets the D7 pulldown
2032 if (ata_check_status(ap
) == 0xFF)
2033 return 1; /* Positive is failure for some reason */
2035 ata_bus_post_reset(ap
, devmask
);
2041 * ata_bus_reset - reset host port and associated ATA channel
2042 * @ap: port to reset
2044 * This is typically the first time we actually start issuing
2045 * commands to the ATA channel. We wait for BSY to clear, then
2046 * issue EXECUTE DEVICE DIAGNOSTIC command, polling for its
2047 * result. Determine what devices, if any, are on the channel
2048 * by looking at the device 0/1 error register. Look at the signature
2049 * stored in each device's taskfile registers, to determine if
2050 * the device is ATA or ATAPI.
2053 * PCI/etc. bus probe sem.
2054 * Obtains host_set lock.
2057 * Sets ATA_FLAG_PORT_DISABLED if bus reset fails.
2060 void ata_bus_reset(struct ata_port
*ap
)
2062 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
2063 unsigned int slave_possible
= ap
->flags
& ATA_FLAG_SLAVE_POSS
;
2065 unsigned int dev0
, dev1
= 0, rc
= 0, devmask
= 0;
2067 DPRINTK("ENTER, host %u, port %u\n", ap
->id
, ap
->port_no
);
2069 /* determine if device 0/1 are present */
2070 if (ap
->flags
& ATA_FLAG_SATA_RESET
)
2073 dev0
= ata_devchk(ap
, 0);
2075 dev1
= ata_devchk(ap
, 1);
2079 devmask
|= (1 << 0);
2081 devmask
|= (1 << 1);
2083 /* select device 0 again */
2084 ap
->ops
->dev_select(ap
, 0);
2086 /* issue bus reset */
2087 if (ap
->flags
& ATA_FLAG_SRST
)
2088 rc
= ata_bus_softreset(ap
, devmask
);
2089 else if ((ap
->flags
& ATA_FLAG_SATA_RESET
) == 0) {
2090 /* set up device control */
2091 if (ap
->flags
& ATA_FLAG_MMIO
)
2092 writeb(ap
->ctl
, (void __iomem
*) ioaddr
->ctl_addr
);
2094 outb(ap
->ctl
, ioaddr
->ctl_addr
);
2095 rc
= ata_bus_edd(ap
);
2102 * determine by signature whether we have ATA or ATAPI devices
2104 ap
->device
[0].class = ata_dev_try_classify(ap
, 0, &err
);
2105 if ((slave_possible
) && (err
!= 0x81))
2106 ap
->device
[1].class = ata_dev_try_classify(ap
, 1, &err
);
2108 /* re-enable interrupts */
2109 if (ap
->ioaddr
.ctl_addr
) /* FIXME: hack. create a hook instead */
2112 /* is double-select really necessary? */
2113 if (ap
->device
[1].class != ATA_DEV_NONE
)
2114 ap
->ops
->dev_select(ap
, 1);
2115 if (ap
->device
[0].class != ATA_DEV_NONE
)
2116 ap
->ops
->dev_select(ap
, 0);
2118 /* if no devices were detected, disable this port */
2119 if ((ap
->device
[0].class == ATA_DEV_NONE
) &&
2120 (ap
->device
[1].class == ATA_DEV_NONE
))
2123 if (ap
->flags
& (ATA_FLAG_SATA_RESET
| ATA_FLAG_SRST
)) {
2124 /* set up device control for ATA_FLAG_SATA_RESET */
2125 if (ap
->flags
& ATA_FLAG_MMIO
)
2126 writeb(ap
->ctl
, (void __iomem
*) ioaddr
->ctl_addr
);
2128 outb(ap
->ctl
, ioaddr
->ctl_addr
);
2135 printk(KERN_ERR
"ata%u: disabling port\n", ap
->id
);
2136 ap
->ops
->port_disable(ap
);
2141 static int sata_phy_resume(struct ata_port
*ap
)
2143 unsigned long timeout
= jiffies
+ (HZ
* 5);
2146 scr_write_flush(ap
, SCR_CONTROL
, 0x300);
2148 /* Wait for phy to become ready, if necessary. */
2151 sstatus
= scr_read(ap
, SCR_STATUS
);
2152 if ((sstatus
& 0xf) != 1)
2154 } while (time_before(jiffies
, timeout
));
2160 * ata_std_probeinit - initialize probing
2161 * @ap: port to be probed
2163 * @ap is about to be probed. Initialize it. This function is
2164 * to be used as standard callback for ata_drive_probe_reset().
2166 * NOTE!!! Do not use this function as probeinit if a low level
2167 * driver implements only hardreset. Just pass NULL as probeinit
2168 * in that case. Using this function is probably okay but doing
2169 * so makes reset sequence different from the original
2170 * ->phy_reset implementation and Jeff nervous. :-P
2172 extern void ata_std_probeinit(struct ata_port
*ap
)
2174 if (ap
->flags
& ATA_FLAG_SATA
&& ap
->ops
->scr_read
) {
2175 sata_phy_resume(ap
);
2176 if (sata_dev_present(ap
))
2177 ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
);
2182 * ata_std_softreset - reset host port via ATA SRST
2183 * @ap: port to reset
2184 * @verbose: fail verbosely
2185 * @classes: resulting classes of attached devices
2187 * Reset host port using ATA SRST. This function is to be used
2188 * as standard callback for ata_drive_*_reset() functions.
2191 * Kernel thread context (may sleep)
2194 * 0 on success, -errno otherwise.
2196 int ata_std_softreset(struct ata_port
*ap
, int verbose
, unsigned int *classes
)
2198 unsigned int slave_possible
= ap
->flags
& ATA_FLAG_SLAVE_POSS
;
2199 unsigned int devmask
= 0, err_mask
;
2204 if (ap
->ops
->scr_read
&& !sata_dev_present(ap
)) {
2205 classes
[0] = ATA_DEV_NONE
;
2209 /* determine if device 0/1 are present */
2210 if (ata_devchk(ap
, 0))
2211 devmask
|= (1 << 0);
2212 if (slave_possible
&& ata_devchk(ap
, 1))
2213 devmask
|= (1 << 1);
2215 /* select device 0 again */
2216 ap
->ops
->dev_select(ap
, 0);
2218 /* issue bus reset */
2219 DPRINTK("about to softreset, devmask=%x\n", devmask
);
2220 err_mask
= ata_bus_softreset(ap
, devmask
);
2223 printk(KERN_ERR
"ata%u: SRST failed (err_mask=0x%x)\n",
2226 DPRINTK("EXIT, softreset failed (err_mask=0x%x)\n",
2231 /* determine by signature whether we have ATA or ATAPI devices */
2232 classes
[0] = ata_dev_try_classify(ap
, 0, &err
);
2233 if (slave_possible
&& err
!= 0x81)
2234 classes
[1] = ata_dev_try_classify(ap
, 1, &err
);
2237 DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes
[0], classes
[1]);
2242 * sata_std_hardreset - reset host port via SATA phy reset
2243 * @ap: port to reset
2244 * @verbose: fail verbosely
2245 * @class: resulting class of attached device
2247 * SATA phy-reset host port using DET bits of SControl register.
2248 * This function is to be used as standard callback for
2249 * ata_drive_*_reset().
2252 * Kernel thread context (may sleep)
2255 * 0 on success, -errno otherwise.
2257 int sata_std_hardreset(struct ata_port
*ap
, int verbose
, unsigned int *class)
2261 /* Issue phy wake/reset */
2262 scr_write_flush(ap
, SCR_CONTROL
, 0x301);
2265 * Couldn't find anything in SATA I/II specs, but AHCI-1.1
2266 * 10.4.2 says at least 1 ms.
2270 /* Bring phy back */
2271 sata_phy_resume(ap
);
2273 /* TODO: phy layer with polling, timeouts, etc. */
2274 if (!sata_dev_present(ap
)) {
2275 *class = ATA_DEV_NONE
;
2276 DPRINTK("EXIT, link offline\n");
2280 if (ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
)) {
2282 printk(KERN_ERR
"ata%u: COMRESET failed "
2283 "(device not ready)\n", ap
->id
);
2285 DPRINTK("EXIT, device not ready\n");
2289 ap
->ops
->dev_select(ap
, 0); /* probably unnecessary */
2291 *class = ata_dev_try_classify(ap
, 0, NULL
);
2293 DPRINTK("EXIT, class=%u\n", *class);
2298 * ata_std_postreset - standard postreset callback
2299 * @ap: the target ata_port
2300 * @classes: classes of attached devices
2302 * This function is invoked after a successful reset. Note that
2303 * the device might have been reset more than once using
2304 * different reset methods before postreset is invoked.
2306 * This function is to be used as standard callback for
2307 * ata_drive_*_reset().
2310 * Kernel thread context (may sleep)
2312 void ata_std_postreset(struct ata_port
*ap
, unsigned int *classes
)
2316 /* set cable type if it isn't already set */
2317 if (ap
->cbl
== ATA_CBL_NONE
&& ap
->flags
& ATA_FLAG_SATA
)
2318 ap
->cbl
= ATA_CBL_SATA
;
2320 /* print link status */
2321 if (ap
->cbl
== ATA_CBL_SATA
)
2322 sata_print_link_status(ap
);
2324 /* re-enable interrupts */
2325 if (ap
->ioaddr
.ctl_addr
) /* FIXME: hack. create a hook instead */
2328 /* is double-select really necessary? */
2329 if (classes
[0] != ATA_DEV_NONE
)
2330 ap
->ops
->dev_select(ap
, 1);
2331 if (classes
[1] != ATA_DEV_NONE
)
2332 ap
->ops
->dev_select(ap
, 0);
2334 /* bail out if no device is present */
2335 if (classes
[0] == ATA_DEV_NONE
&& classes
[1] == ATA_DEV_NONE
) {
2336 DPRINTK("EXIT, no device\n");
2340 /* set up device control */
2341 if (ap
->ioaddr
.ctl_addr
) {
2342 if (ap
->flags
& ATA_FLAG_MMIO
)
2343 writeb(ap
->ctl
, (void __iomem
*) ap
->ioaddr
.ctl_addr
);
2345 outb(ap
->ctl
, ap
->ioaddr
.ctl_addr
);
2352 * ata_std_probe_reset - standard probe reset method
2353 * @ap: prot to perform probe-reset
2354 * @classes: resulting classes of attached devices
2356 * The stock off-the-shelf ->probe_reset method.
2359 * Kernel thread context (may sleep)
2362 * 0 on success, -errno otherwise.
2364 int ata_std_probe_reset(struct ata_port
*ap
, unsigned int *classes
)
2366 ata_reset_fn_t hardreset
;
2369 if (ap
->flags
& ATA_FLAG_SATA
&& ap
->ops
->scr_read
)
2370 hardreset
= sata_std_hardreset
;
2372 return ata_drive_probe_reset(ap
, ata_std_probeinit
,
2373 ata_std_softreset
, hardreset
,
2374 ata_std_postreset
, classes
);
2377 static int do_probe_reset(struct ata_port
*ap
, ata_reset_fn_t reset
,
2378 ata_postreset_fn_t postreset
,
2379 unsigned int *classes
)
2383 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
2384 classes
[i
] = ATA_DEV_UNKNOWN
;
2386 rc
= reset(ap
, 0, classes
);
2390 /* If any class isn't ATA_DEV_UNKNOWN, consider classification
2391 * is complete and convert all ATA_DEV_UNKNOWN to
2394 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
2395 if (classes
[i
] != ATA_DEV_UNKNOWN
)
2398 if (i
< ATA_MAX_DEVICES
)
2399 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
2400 if (classes
[i
] == ATA_DEV_UNKNOWN
)
2401 classes
[i
] = ATA_DEV_NONE
;
2404 postreset(ap
, classes
);
2406 return classes
[0] != ATA_DEV_UNKNOWN
? 0 : -ENODEV
;
2410 * ata_drive_probe_reset - Perform probe reset with given methods
2411 * @ap: port to reset
2412 * @probeinit: probeinit method (can be NULL)
2413 * @softreset: softreset method (can be NULL)
2414 * @hardreset: hardreset method (can be NULL)
2415 * @postreset: postreset method (can be NULL)
2416 * @classes: resulting classes of attached devices
2418 * Reset the specified port and classify attached devices using
2419 * given methods. This function prefers softreset but tries all
2420 * possible reset sequences to reset and classify devices. This
2421 * function is intended to be used for constructing ->probe_reset
2422 * callback by low level drivers.
2424 * Reset methods should follow the following rules.
2426 * - Return 0 on sucess, -errno on failure.
2427 * - If classification is supported, fill classes[] with
2428 * recognized class codes.
2429 * - If classification is not supported, leave classes[] alone.
2430 * - If verbose is non-zero, print error message on failure;
2431 * otherwise, shut up.
2434 * Kernel thread context (may sleep)
2437 * 0 on success, -EINVAL if no reset method is avaliable, -ENODEV
2438 * if classification fails, and any error code from reset
2441 int ata_drive_probe_reset(struct ata_port
*ap
, ata_probeinit_fn_t probeinit
,
2442 ata_reset_fn_t softreset
, ata_reset_fn_t hardreset
,
2443 ata_postreset_fn_t postreset
, unsigned int *classes
)
2451 rc
= do_probe_reset(ap
, softreset
, postreset
, classes
);
2459 rc
= do_probe_reset(ap
, hardreset
, postreset
, classes
);
2460 if (rc
== 0 || rc
!= -ENODEV
)
2464 rc
= do_probe_reset(ap
, softreset
, postreset
, classes
);
2470 * ata_dev_same_device - Determine whether new ID matches configured device
2471 * @ap: port on which the device to compare against resides
2472 * @dev: device to compare against
2473 * @new_class: class of the new device
2474 * @new_id: IDENTIFY page of the new device
2476 * Compare @new_class and @new_id against @dev and determine
2477 * whether @dev is the device indicated by @new_class and
2484 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
2486 static int ata_dev_same_device(struct ata_port
*ap
, struct ata_device
*dev
,
2487 unsigned int new_class
, const u16
*new_id
)
2489 const u16
*old_id
= dev
->id
;
2490 unsigned char model
[2][41], serial
[2][21];
2493 if (dev
->class != new_class
) {
2495 "ata%u: dev %u class mismatch %d != %d\n",
2496 ap
->id
, dev
->devno
, dev
->class, new_class
);
2500 ata_id_c_string(old_id
, model
[0], ATA_ID_PROD_OFS
, sizeof(model
[0]));
2501 ata_id_c_string(new_id
, model
[1], ATA_ID_PROD_OFS
, sizeof(model
[1]));
2502 ata_id_c_string(old_id
, serial
[0], ATA_ID_SERNO_OFS
, sizeof(serial
[0]));
2503 ata_id_c_string(new_id
, serial
[1], ATA_ID_SERNO_OFS
, sizeof(serial
[1]));
2504 new_n_sectors
= ata_id_n_sectors(new_id
);
2506 if (strcmp(model
[0], model
[1])) {
2508 "ata%u: dev %u model number mismatch '%s' != '%s'\n",
2509 ap
->id
, dev
->devno
, model
[0], model
[1]);
2513 if (strcmp(serial
[0], serial
[1])) {
2515 "ata%u: dev %u serial number mismatch '%s' != '%s'\n",
2516 ap
->id
, dev
->devno
, serial
[0], serial
[1]);
2520 if (dev
->class == ATA_DEV_ATA
&& dev
->n_sectors
!= new_n_sectors
) {
2522 "ata%u: dev %u n_sectors mismatch %llu != %llu\n",
2523 ap
->id
, dev
->devno
, (unsigned long long)dev
->n_sectors
,
2524 (unsigned long long)new_n_sectors
);
2532 * ata_dev_revalidate - Revalidate ATA device
2533 * @ap: port on which the device to revalidate resides
2534 * @dev: device to revalidate
2535 * @post_reset: is this revalidation after reset?
2537 * Re-read IDENTIFY page and make sure @dev is still attached to
2541 * Kernel thread context (may sleep)
2544 * 0 on success, negative errno otherwise
2546 int ata_dev_revalidate(struct ata_port
*ap
, struct ata_device
*dev
,
2553 if (!ata_dev_present(dev
))
2559 /* allocate & read ID data */
2560 rc
= ata_dev_read_id(ap
, dev
, &class, post_reset
, &id
);
2564 /* is the device still there? */
2565 if (!ata_dev_same_device(ap
, dev
, class, id
)) {
2573 /* configure device according to the new ID */
2574 return ata_dev_configure(ap
, dev
, 0);
2577 printk(KERN_ERR
"ata%u: dev %u revalidation failed (errno=%d)\n",
2578 ap
->id
, dev
->devno
, rc
);
2583 static const char * const ata_dma_blacklist
[] = {
2584 "WDC AC11000H", NULL
,
2585 "WDC AC22100H", NULL
,
2586 "WDC AC32500H", NULL
,
2587 "WDC AC33100H", NULL
,
2588 "WDC AC31600H", NULL
,
2589 "WDC AC32100H", "24.09P07",
2590 "WDC AC23200L", "21.10N21",
2591 "Compaq CRD-8241B", NULL
,
2596 "SanDisk SDP3B", NULL
,
2597 "SanDisk SDP3B-64", NULL
,
2598 "SANYO CD-ROM CRD", NULL
,
2599 "HITACHI CDR-8", NULL
,
2600 "HITACHI CDR-8335", NULL
,
2601 "HITACHI CDR-8435", NULL
,
2602 "Toshiba CD-ROM XM-6202B", NULL
,
2603 "TOSHIBA CD-ROM XM-1702BC", NULL
,
2605 "E-IDE CD-ROM CR-840", NULL
,
2606 "CD-ROM Drive/F5A", NULL
,
2607 "WPI CDD-820", NULL
,
2608 "SAMSUNG CD-ROM SC-148C", NULL
,
2609 "SAMSUNG CD-ROM SC", NULL
,
2610 "SanDisk SDP3B-64", NULL
,
2611 "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL
,
2612 "_NEC DV5800A", NULL
,
2613 "SAMSUNG CD-ROM SN-124", "N001"
2616 static int ata_strim(char *s
, size_t len
)
2618 len
= strnlen(s
, len
);
2620 /* ATAPI specifies that empty space is blank-filled; remove blanks */
2621 while ((len
> 0) && (s
[len
- 1] == ' ')) {
2628 static int ata_dma_blacklisted(const struct ata_device
*dev
)
2630 unsigned char model_num
[40];
2631 unsigned char model_rev
[16];
2632 unsigned int nlen
, rlen
;
2635 ata_id_string(dev
->id
, model_num
, ATA_ID_PROD_OFS
,
2637 ata_id_string(dev
->id
, model_rev
, ATA_ID_FW_REV_OFS
,
2639 nlen
= ata_strim(model_num
, sizeof(model_num
));
2640 rlen
= ata_strim(model_rev
, sizeof(model_rev
));
2642 for (i
= 0; i
< ARRAY_SIZE(ata_dma_blacklist
); i
+= 2) {
2643 if (!strncmp(ata_dma_blacklist
[i
], model_num
, nlen
)) {
2644 if (ata_dma_blacklist
[i
+1] == NULL
)
2646 if (!strncmp(ata_dma_blacklist
[i
], model_rev
, rlen
))
2654 * ata_dev_xfermask - Compute supported xfermask of the given device
2655 * @ap: Port on which the device to compute xfermask for resides
2656 * @dev: Device to compute xfermask for
2658 * Compute supported xfermask of @dev and store it in
2659 * dev->*_mask. This function is responsible for applying all
2660 * known limits including host controller limits, device
2666 static void ata_dev_xfermask(struct ata_port
*ap
, struct ata_device
*dev
)
2668 unsigned long xfer_mask
;
2671 xfer_mask
= ata_pack_xfermask(ap
->pio_mask
, ap
->mwdma_mask
,
2674 /* use port-wide xfermask for now */
2675 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
2676 struct ata_device
*d
= &ap
->device
[i
];
2677 if (!ata_dev_present(d
))
2679 xfer_mask
&= ata_pack_xfermask(d
->pio_mask
, d
->mwdma_mask
,
2681 xfer_mask
&= ata_id_xfermask(d
->id
);
2682 if (ata_dma_blacklisted(d
))
2683 xfer_mask
&= ~(ATA_MASK_MWDMA
| ATA_MASK_UDMA
);
2686 if (ata_dma_blacklisted(dev
))
2687 printk(KERN_WARNING
"ata%u: dev %u is on DMA blacklist, "
2688 "disabling DMA\n", ap
->id
, dev
->devno
);
2690 ata_unpack_xfermask(xfer_mask
, &dev
->pio_mask
, &dev
->mwdma_mask
,
2695 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
2696 * @ap: Port associated with device @dev
2697 * @dev: Device to which command will be sent
2699 * Issue SET FEATURES - XFER MODE command to device @dev
2703 * PCI/etc. bus probe sem.
2706 static void ata_dev_set_xfermode(struct ata_port
*ap
, struct ata_device
*dev
)
2708 struct ata_taskfile tf
;
2710 /* set up set-features taskfile */
2711 DPRINTK("set features - xfer mode\n");
2713 ata_tf_init(ap
, &tf
, dev
->devno
);
2714 tf
.command
= ATA_CMD_SET_FEATURES
;
2715 tf
.feature
= SETFEATURES_XFER
;
2716 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
2717 tf
.protocol
= ATA_PROT_NODATA
;
2718 tf
.nsect
= dev
->xfer_mode
;
2720 if (ata_exec_internal(ap
, dev
, &tf
, DMA_NONE
, NULL
, 0)) {
2721 printk(KERN_ERR
"ata%u: failed to set xfermode, disabled\n",
2723 ata_port_disable(ap
);
2730 * ata_dev_init_params - Issue INIT DEV PARAMS command
2731 * @ap: Port associated with device @dev
2732 * @dev: Device to which command will be sent
2735 * Kernel thread context (may sleep)
2738 * 0 on success, AC_ERR_* mask otherwise.
2741 static unsigned int ata_dev_init_params(struct ata_port
*ap
,
2742 struct ata_device
*dev
)
2744 struct ata_taskfile tf
;
2745 unsigned int err_mask
;
2746 u16 sectors
= dev
->id
[6];
2747 u16 heads
= dev
->id
[3];
2749 /* Number of sectors per track 1-255. Number of heads 1-16 */
2750 if (sectors
< 1 || sectors
> 255 || heads
< 1 || heads
> 16)
2753 /* set up init dev params taskfile */
2754 DPRINTK("init dev params \n");
2756 ata_tf_init(ap
, &tf
, dev
->devno
);
2757 tf
.command
= ATA_CMD_INIT_DEV_PARAMS
;
2758 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
2759 tf
.protocol
= ATA_PROT_NODATA
;
2761 tf
.device
|= (heads
- 1) & 0x0f; /* max head = num. of heads - 1 */
2763 err_mask
= ata_exec_internal(ap
, dev
, &tf
, DMA_NONE
, NULL
, 0);
2765 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
2770 * ata_sg_clean - Unmap DMA memory associated with command
2771 * @qc: Command containing DMA memory to be released
2773 * Unmap all mapped DMA memory associated with this command.
2776 * spin_lock_irqsave(host_set lock)
2779 static void ata_sg_clean(struct ata_queued_cmd
*qc
)
2781 struct ata_port
*ap
= qc
->ap
;
2782 struct scatterlist
*sg
= qc
->__sg
;
2783 int dir
= qc
->dma_dir
;
2784 void *pad_buf
= NULL
;
2786 WARN_ON(!(qc
->flags
& ATA_QCFLAG_DMAMAP
));
2787 WARN_ON(sg
== NULL
);
2789 if (qc
->flags
& ATA_QCFLAG_SINGLE
)
2790 WARN_ON(qc
->n_elem
> 1);
2792 VPRINTK("unmapping %u sg elements\n", qc
->n_elem
);
2794 /* if we padded the buffer out to 32-bit bound, and data
2795 * xfer direction is from-device, we must copy from the
2796 * pad buffer back into the supplied buffer
2798 if (qc
->pad_len
&& !(qc
->tf
.flags
& ATA_TFLAG_WRITE
))
2799 pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
2801 if (qc
->flags
& ATA_QCFLAG_SG
) {
2803 dma_unmap_sg(ap
->host_set
->dev
, sg
, qc
->n_elem
, dir
);
2804 /* restore last sg */
2805 sg
[qc
->orig_n_elem
- 1].length
+= qc
->pad_len
;
2807 struct scatterlist
*psg
= &qc
->pad_sgent
;
2808 void *addr
= kmap_atomic(psg
->page
, KM_IRQ0
);
2809 memcpy(addr
+ psg
->offset
, pad_buf
, qc
->pad_len
);
2810 kunmap_atomic(addr
, KM_IRQ0
);
2814 dma_unmap_single(ap
->host_set
->dev
,
2815 sg_dma_address(&sg
[0]), sg_dma_len(&sg
[0]),
2818 sg
->length
+= qc
->pad_len
;
2820 memcpy(qc
->buf_virt
+ sg
->length
- qc
->pad_len
,
2821 pad_buf
, qc
->pad_len
);
2824 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
2829 * ata_fill_sg - Fill PCI IDE PRD table
2830 * @qc: Metadata associated with taskfile to be transferred
2832 * Fill PCI IDE PRD (scatter-gather) table with segments
2833 * associated with the current disk command.
2836 * spin_lock_irqsave(host_set lock)
2839 static void ata_fill_sg(struct ata_queued_cmd
*qc
)
2841 struct ata_port
*ap
= qc
->ap
;
2842 struct scatterlist
*sg
;
2845 WARN_ON(qc
->__sg
== NULL
);
2846 WARN_ON(qc
->n_elem
== 0 && qc
->pad_len
== 0);
2849 ata_for_each_sg(sg
, qc
) {
2853 /* determine if physical DMA addr spans 64K boundary.
2854 * Note h/w doesn't support 64-bit, so we unconditionally
2855 * truncate dma_addr_t to u32.
2857 addr
= (u32
) sg_dma_address(sg
);
2858 sg_len
= sg_dma_len(sg
);
2861 offset
= addr
& 0xffff;
2863 if ((offset
+ sg_len
) > 0x10000)
2864 len
= 0x10000 - offset
;
2866 ap
->prd
[idx
].addr
= cpu_to_le32(addr
);
2867 ap
->prd
[idx
].flags_len
= cpu_to_le32(len
& 0xffff);
2868 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx
, addr
, len
);
2877 ap
->prd
[idx
- 1].flags_len
|= cpu_to_le32(ATA_PRD_EOT
);
2880 * ata_check_atapi_dma - Check whether ATAPI DMA can be supported
2881 * @qc: Metadata associated with taskfile to check
2883 * Allow low-level driver to filter ATA PACKET commands, returning
2884 * a status indicating whether or not it is OK to use DMA for the
2885 * supplied PACKET command.
2888 * spin_lock_irqsave(host_set lock)
2890 * RETURNS: 0 when ATAPI DMA can be used
2893 int ata_check_atapi_dma(struct ata_queued_cmd
*qc
)
2895 struct ata_port
*ap
= qc
->ap
;
2896 int rc
= 0; /* Assume ATAPI DMA is OK by default */
2898 if (ap
->ops
->check_atapi_dma
)
2899 rc
= ap
->ops
->check_atapi_dma(qc
);
2904 * ata_qc_prep - Prepare taskfile for submission
2905 * @qc: Metadata associated with taskfile to be prepared
2907 * Prepare ATA taskfile for submission.
2910 * spin_lock_irqsave(host_set lock)
2912 void ata_qc_prep(struct ata_queued_cmd
*qc
)
2914 if (!(qc
->flags
& ATA_QCFLAG_DMAMAP
))
2920 void ata_noop_qc_prep(struct ata_queued_cmd
*qc
) { }
2923 * ata_sg_init_one - Associate command with memory buffer
2924 * @qc: Command to be associated
2925 * @buf: Memory buffer
2926 * @buflen: Length of memory buffer, in bytes.
2928 * Initialize the data-related elements of queued_cmd @qc
2929 * to point to a single memory buffer, @buf of byte length @buflen.
2932 * spin_lock_irqsave(host_set lock)
2935 void ata_sg_init_one(struct ata_queued_cmd
*qc
, void *buf
, unsigned int buflen
)
2937 struct scatterlist
*sg
;
2939 qc
->flags
|= ATA_QCFLAG_SINGLE
;
2941 memset(&qc
->sgent
, 0, sizeof(qc
->sgent
));
2942 qc
->__sg
= &qc
->sgent
;
2944 qc
->orig_n_elem
= 1;
2948 sg_init_one(sg
, buf
, buflen
);
2952 * ata_sg_init - Associate command with scatter-gather table.
2953 * @qc: Command to be associated
2954 * @sg: Scatter-gather table.
2955 * @n_elem: Number of elements in s/g table.
2957 * Initialize the data-related elements of queued_cmd @qc
2958 * to point to a scatter-gather table @sg, containing @n_elem
2962 * spin_lock_irqsave(host_set lock)
2965 void ata_sg_init(struct ata_queued_cmd
*qc
, struct scatterlist
*sg
,
2966 unsigned int n_elem
)
2968 qc
->flags
|= ATA_QCFLAG_SG
;
2970 qc
->n_elem
= n_elem
;
2971 qc
->orig_n_elem
= n_elem
;
2975 * ata_sg_setup_one - DMA-map the memory buffer associated with a command.
2976 * @qc: Command with memory buffer to be mapped.
2978 * DMA-map the memory buffer associated with queued_cmd @qc.
2981 * spin_lock_irqsave(host_set lock)
2984 * Zero on success, negative on error.
2987 static int ata_sg_setup_one(struct ata_queued_cmd
*qc
)
2989 struct ata_port
*ap
= qc
->ap
;
2990 int dir
= qc
->dma_dir
;
2991 struct scatterlist
*sg
= qc
->__sg
;
2992 dma_addr_t dma_address
;
2995 /* we must lengthen transfers to end on a 32-bit boundary */
2996 qc
->pad_len
= sg
->length
& 3;
2998 void *pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
2999 struct scatterlist
*psg
= &qc
->pad_sgent
;
3001 WARN_ON(qc
->dev
->class != ATA_DEV_ATAPI
);
3003 memset(pad_buf
, 0, ATA_DMA_PAD_SZ
);
3005 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
)
3006 memcpy(pad_buf
, qc
->buf_virt
+ sg
->length
- qc
->pad_len
,
3009 sg_dma_address(psg
) = ap
->pad_dma
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
3010 sg_dma_len(psg
) = ATA_DMA_PAD_SZ
;
3012 sg
->length
-= qc
->pad_len
;
3013 if (sg
->length
== 0)
3016 DPRINTK("padding done, sg->length=%u pad_len=%u\n",
3017 sg
->length
, qc
->pad_len
);
3025 dma_address
= dma_map_single(ap
->host_set
->dev
, qc
->buf_virt
,
3027 if (dma_mapping_error(dma_address
)) {
3029 sg
->length
+= qc
->pad_len
;
3033 sg_dma_address(sg
) = dma_address
;
3034 sg_dma_len(sg
) = sg
->length
;
3037 DPRINTK("mapped buffer of %d bytes for %s\n", sg_dma_len(sg
),
3038 qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
3044 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
3045 * @qc: Command with scatter-gather table to be mapped.
3047 * DMA-map the scatter-gather table associated with queued_cmd @qc.
3050 * spin_lock_irqsave(host_set lock)
3053 * Zero on success, negative on error.
3057 static int ata_sg_setup(struct ata_queued_cmd
*qc
)
3059 struct ata_port
*ap
= qc
->ap
;
3060 struct scatterlist
*sg
= qc
->__sg
;
3061 struct scatterlist
*lsg
= &sg
[qc
->n_elem
- 1];
3062 int n_elem
, pre_n_elem
, dir
, trim_sg
= 0;
3064 VPRINTK("ENTER, ata%u\n", ap
->id
);
3065 WARN_ON(!(qc
->flags
& ATA_QCFLAG_SG
));
3067 /* we must lengthen transfers to end on a 32-bit boundary */
3068 qc
->pad_len
= lsg
->length
& 3;
3070 void *pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
3071 struct scatterlist
*psg
= &qc
->pad_sgent
;
3072 unsigned int offset
;
3074 WARN_ON(qc
->dev
->class != ATA_DEV_ATAPI
);
3076 memset(pad_buf
, 0, ATA_DMA_PAD_SZ
);
3079 * psg->page/offset are used to copy to-be-written
3080 * data in this function or read data in ata_sg_clean.
3082 offset
= lsg
->offset
+ lsg
->length
- qc
->pad_len
;
3083 psg
->page
= nth_page(lsg
->page
, offset
>> PAGE_SHIFT
);
3084 psg
->offset
= offset_in_page(offset
);
3086 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
) {
3087 void *addr
= kmap_atomic(psg
->page
, KM_IRQ0
);
3088 memcpy(pad_buf
, addr
+ psg
->offset
, qc
->pad_len
);
3089 kunmap_atomic(addr
, KM_IRQ0
);
3092 sg_dma_address(psg
) = ap
->pad_dma
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
3093 sg_dma_len(psg
) = ATA_DMA_PAD_SZ
;
3095 lsg
->length
-= qc
->pad_len
;
3096 if (lsg
->length
== 0)
3099 DPRINTK("padding done, sg[%d].length=%u pad_len=%u\n",
3100 qc
->n_elem
- 1, lsg
->length
, qc
->pad_len
);
3103 pre_n_elem
= qc
->n_elem
;
3104 if (trim_sg
&& pre_n_elem
)
3113 n_elem
= dma_map_sg(ap
->host_set
->dev
, sg
, pre_n_elem
, dir
);
3115 /* restore last sg */
3116 lsg
->length
+= qc
->pad_len
;
3120 DPRINTK("%d sg elements mapped\n", n_elem
);
3123 qc
->n_elem
= n_elem
;
3129 * ata_poll_qc_complete - turn irq back on and finish qc
3130 * @qc: Command to complete
3131 * @err_mask: ATA status register content
3134 * None. (grabs host lock)
3137 void ata_poll_qc_complete(struct ata_queued_cmd
*qc
)
3139 struct ata_port
*ap
= qc
->ap
;
3140 unsigned long flags
;
3142 spin_lock_irqsave(&ap
->host_set
->lock
, flags
);
3143 ap
->flags
&= ~ATA_FLAG_NOINTR
;
3145 ata_qc_complete(qc
);
3146 spin_unlock_irqrestore(&ap
->host_set
->lock
, flags
);
3150 * ata_pio_poll - poll using PIO, depending on current state
3151 * @ap: the target ata_port
3154 * None. (executing in kernel thread context)
3157 * timeout value to use
3160 static unsigned long ata_pio_poll(struct ata_port
*ap
)
3162 struct ata_queued_cmd
*qc
;
3164 unsigned int poll_state
= HSM_ST_UNKNOWN
;
3165 unsigned int reg_state
= HSM_ST_UNKNOWN
;
3167 qc
= ata_qc_from_tag(ap
, ap
->active_tag
);
3168 WARN_ON(qc
== NULL
);
3170 switch (ap
->hsm_task_state
) {
3173 poll_state
= HSM_ST_POLL
;
3177 case HSM_ST_LAST_POLL
:
3178 poll_state
= HSM_ST_LAST_POLL
;
3179 reg_state
= HSM_ST_LAST
;
3186 status
= ata_chk_status(ap
);
3187 if (status
& ATA_BUSY
) {
3188 if (time_after(jiffies
, ap
->pio_task_timeout
)) {
3189 qc
->err_mask
|= AC_ERR_TIMEOUT
;
3190 ap
->hsm_task_state
= HSM_ST_TMOUT
;
3193 ap
->hsm_task_state
= poll_state
;
3194 return ATA_SHORT_PAUSE
;
3197 ap
->hsm_task_state
= reg_state
;
3202 * ata_pio_complete - check if drive is busy or idle
3203 * @ap: the target ata_port
3206 * None. (executing in kernel thread context)
3209 * Non-zero if qc completed, zero otherwise.
3212 static int ata_pio_complete (struct ata_port
*ap
)
3214 struct ata_queued_cmd
*qc
;
3218 * This is purely heuristic. This is a fast path. Sometimes when
3219 * we enter, BSY will be cleared in a chk-status or two. If not,
3220 * the drive is probably seeking or something. Snooze for a couple
3221 * msecs, then chk-status again. If still busy, fall back to
3222 * HSM_ST_POLL state.
3224 drv_stat
= ata_busy_wait(ap
, ATA_BUSY
, 10);
3225 if (drv_stat
& ATA_BUSY
) {
3227 drv_stat
= ata_busy_wait(ap
, ATA_BUSY
, 10);
3228 if (drv_stat
& ATA_BUSY
) {
3229 ap
->hsm_task_state
= HSM_ST_LAST_POLL
;
3230 ap
->pio_task_timeout
= jiffies
+ ATA_TMOUT_PIO
;
3235 qc
= ata_qc_from_tag(ap
, ap
->active_tag
);
3236 WARN_ON(qc
== NULL
);
3238 drv_stat
= ata_wait_idle(ap
);
3239 if (!ata_ok(drv_stat
)) {
3240 qc
->err_mask
|= __ac_err_mask(drv_stat
);
3241 ap
->hsm_task_state
= HSM_ST_ERR
;
3245 ap
->hsm_task_state
= HSM_ST_IDLE
;
3247 WARN_ON(qc
->err_mask
);
3248 ata_poll_qc_complete(qc
);
3250 /* another command may start at this point */
3257 * swap_buf_le16 - swap halves of 16-bit words in place
3258 * @buf: Buffer to swap
3259 * @buf_words: Number of 16-bit words in buffer.
3261 * Swap halves of 16-bit words if needed to convert from
3262 * little-endian byte order to native cpu byte order, or
3266 * Inherited from caller.
3268 void swap_buf_le16(u16
*buf
, unsigned int buf_words
)
3273 for (i
= 0; i
< buf_words
; i
++)
3274 buf
[i
] = le16_to_cpu(buf
[i
]);
3275 #endif /* __BIG_ENDIAN */
3279 * ata_mmio_data_xfer - Transfer data by MMIO
3280 * @ap: port to read/write
3282 * @buflen: buffer length
3283 * @write_data: read/write
3285 * Transfer data from/to the device data register by MMIO.
3288 * Inherited from caller.
3291 static void ata_mmio_data_xfer(struct ata_port
*ap
, unsigned char *buf
,
3292 unsigned int buflen
, int write_data
)
3295 unsigned int words
= buflen
>> 1;
3296 u16
*buf16
= (u16
*) buf
;
3297 void __iomem
*mmio
= (void __iomem
*)ap
->ioaddr
.data_addr
;
3299 /* Transfer multiple of 2 bytes */
3301 for (i
= 0; i
< words
; i
++)
3302 writew(le16_to_cpu(buf16
[i
]), mmio
);
3304 for (i
= 0; i
< words
; i
++)
3305 buf16
[i
] = cpu_to_le16(readw(mmio
));
3308 /* Transfer trailing 1 byte, if any. */
3309 if (unlikely(buflen
& 0x01)) {
3310 u16 align_buf
[1] = { 0 };
3311 unsigned char *trailing_buf
= buf
+ buflen
- 1;
3314 memcpy(align_buf
, trailing_buf
, 1);
3315 writew(le16_to_cpu(align_buf
[0]), mmio
);
3317 align_buf
[0] = cpu_to_le16(readw(mmio
));
3318 memcpy(trailing_buf
, align_buf
, 1);
3324 * ata_pio_data_xfer - Transfer data by PIO
3325 * @ap: port to read/write
3327 * @buflen: buffer length
3328 * @write_data: read/write
3330 * Transfer data from/to the device data register by PIO.
3333 * Inherited from caller.
3336 static void ata_pio_data_xfer(struct ata_port
*ap
, unsigned char *buf
,
3337 unsigned int buflen
, int write_data
)
3339 unsigned int words
= buflen
>> 1;
3341 /* Transfer multiple of 2 bytes */
3343 outsw(ap
->ioaddr
.data_addr
, buf
, words
);
3345 insw(ap
->ioaddr
.data_addr
, buf
, words
);
3347 /* Transfer trailing 1 byte, if any. */
3348 if (unlikely(buflen
& 0x01)) {
3349 u16 align_buf
[1] = { 0 };
3350 unsigned char *trailing_buf
= buf
+ buflen
- 1;
3353 memcpy(align_buf
, trailing_buf
, 1);
3354 outw(le16_to_cpu(align_buf
[0]), ap
->ioaddr
.data_addr
);
3356 align_buf
[0] = cpu_to_le16(inw(ap
->ioaddr
.data_addr
));
3357 memcpy(trailing_buf
, align_buf
, 1);
3363 * ata_data_xfer - Transfer data from/to the data register.
3364 * @ap: port to read/write
3366 * @buflen: buffer length
3367 * @do_write: read/write
3369 * Transfer data from/to the device data register.
3372 * Inherited from caller.
3375 static void ata_data_xfer(struct ata_port
*ap
, unsigned char *buf
,
3376 unsigned int buflen
, int do_write
)
3378 /* Make the crap hardware pay the costs not the good stuff */
3379 if (unlikely(ap
->flags
& ATA_FLAG_IRQ_MASK
)) {
3380 unsigned long flags
;
3381 local_irq_save(flags
);
3382 if (ap
->flags
& ATA_FLAG_MMIO
)
3383 ata_mmio_data_xfer(ap
, buf
, buflen
, do_write
);
3385 ata_pio_data_xfer(ap
, buf
, buflen
, do_write
);
3386 local_irq_restore(flags
);
3388 if (ap
->flags
& ATA_FLAG_MMIO
)
3389 ata_mmio_data_xfer(ap
, buf
, buflen
, do_write
);
3391 ata_pio_data_xfer(ap
, buf
, buflen
, do_write
);
3396 * ata_pio_sector - Transfer ATA_SECT_SIZE (512 bytes) of data.
3397 * @qc: Command on going
3399 * Transfer ATA_SECT_SIZE of data from/to the ATA device.
3402 * Inherited from caller.
3405 static void ata_pio_sector(struct ata_queued_cmd
*qc
)
3407 int do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
);
3408 struct scatterlist
*sg
= qc
->__sg
;
3409 struct ata_port
*ap
= qc
->ap
;
3411 unsigned int offset
;
3414 if (qc
->cursect
== (qc
->nsect
- 1))
3415 ap
->hsm_task_state
= HSM_ST_LAST
;
3417 page
= sg
[qc
->cursg
].page
;
3418 offset
= sg
[qc
->cursg
].offset
+ qc
->cursg_ofs
* ATA_SECT_SIZE
;
3420 /* get the current page and offset */
3421 page
= nth_page(page
, (offset
>> PAGE_SHIFT
));
3422 offset
%= PAGE_SIZE
;
3424 buf
= kmap(page
) + offset
;
3429 if ((qc
->cursg_ofs
* ATA_SECT_SIZE
) == (&sg
[qc
->cursg
])->length
) {
3434 DPRINTK("data %s\n", qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
3436 /* do the actual data transfer */
3437 do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
);
3438 ata_data_xfer(ap
, buf
, ATA_SECT_SIZE
, do_write
);
3444 * __atapi_pio_bytes - Transfer data from/to the ATAPI device.
3445 * @qc: Command on going
3446 * @bytes: number of bytes
3448 * Transfer Transfer data from/to the ATAPI device.
3451 * Inherited from caller.
3455 static void __atapi_pio_bytes(struct ata_queued_cmd
*qc
, unsigned int bytes
)
3457 int do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
);
3458 struct scatterlist
*sg
= qc
->__sg
;
3459 struct ata_port
*ap
= qc
->ap
;
3462 unsigned int offset
, count
;
3464 if (qc
->curbytes
+ bytes
>= qc
->nbytes
)
3465 ap
->hsm_task_state
= HSM_ST_LAST
;
3468 if (unlikely(qc
->cursg
>= qc
->n_elem
)) {
3470 * The end of qc->sg is reached and the device expects
3471 * more data to transfer. In order not to overrun qc->sg
3472 * and fulfill length specified in the byte count register,
3473 * - for read case, discard trailing data from the device
3474 * - for write case, padding zero data to the device
3476 u16 pad_buf
[1] = { 0 };
3477 unsigned int words
= bytes
>> 1;
3480 if (words
) /* warning if bytes > 1 */
3481 printk(KERN_WARNING
"ata%u: %u bytes trailing data\n",
3484 for (i
= 0; i
< words
; i
++)
3485 ata_data_xfer(ap
, (unsigned char*)pad_buf
, 2, do_write
);
3487 ap
->hsm_task_state
= HSM_ST_LAST
;
3491 sg
= &qc
->__sg
[qc
->cursg
];
3494 offset
= sg
->offset
+ qc
->cursg_ofs
;
3496 /* get the current page and offset */
3497 page
= nth_page(page
, (offset
>> PAGE_SHIFT
));
3498 offset
%= PAGE_SIZE
;
3500 /* don't overrun current sg */
3501 count
= min(sg
->length
- qc
->cursg_ofs
, bytes
);
3503 /* don't cross page boundaries */
3504 count
= min(count
, (unsigned int)PAGE_SIZE
- offset
);
3506 buf
= kmap(page
) + offset
;
3509 qc
->curbytes
+= count
;
3510 qc
->cursg_ofs
+= count
;
3512 if (qc
->cursg_ofs
== sg
->length
) {
3517 DPRINTK("data %s\n", qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
3519 /* do the actual data transfer */
3520 ata_data_xfer(ap
, buf
, count
, do_write
);
3529 * atapi_pio_bytes - Transfer data from/to the ATAPI device.
3530 * @qc: Command on going
3532 * Transfer Transfer data from/to the ATAPI device.
3535 * Inherited from caller.
3538 static void atapi_pio_bytes(struct ata_queued_cmd
*qc
)
3540 struct ata_port
*ap
= qc
->ap
;
3541 struct ata_device
*dev
= qc
->dev
;
3542 unsigned int ireason
, bc_lo
, bc_hi
, bytes
;
3543 int i_write
, do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
) ? 1 : 0;
3545 ap
->ops
->tf_read(ap
, &qc
->tf
);
3546 ireason
= qc
->tf
.nsect
;
3547 bc_lo
= qc
->tf
.lbam
;
3548 bc_hi
= qc
->tf
.lbah
;
3549 bytes
= (bc_hi
<< 8) | bc_lo
;
3551 /* shall be cleared to zero, indicating xfer of data */
3552 if (ireason
& (1 << 0))
3555 /* make sure transfer direction matches expected */
3556 i_write
= ((ireason
& (1 << 1)) == 0) ? 1 : 0;
3557 if (do_write
!= i_write
)
3560 __atapi_pio_bytes(qc
, bytes
);
3565 printk(KERN_INFO
"ata%u: dev %u: ATAPI check failed\n",
3566 ap
->id
, dev
->devno
);
3567 qc
->err_mask
|= AC_ERR_HSM
;
3568 ap
->hsm_task_state
= HSM_ST_ERR
;
3572 * ata_pio_block - start PIO on a block
3573 * @ap: the target ata_port
3576 * None. (executing in kernel thread context)
3579 static void ata_pio_block(struct ata_port
*ap
)
3581 struct ata_queued_cmd
*qc
;
3585 * This is purely heuristic. This is a fast path.
3586 * Sometimes when we enter, BSY will be cleared in
3587 * a chk-status or two. If not, the drive is probably seeking
3588 * or something. Snooze for a couple msecs, then
3589 * chk-status again. If still busy, fall back to
3590 * HSM_ST_POLL state.
3592 status
= ata_busy_wait(ap
, ATA_BUSY
, 5);
3593 if (status
& ATA_BUSY
) {
3595 status
= ata_busy_wait(ap
, ATA_BUSY
, 10);
3596 if (status
& ATA_BUSY
) {
3597 ap
->hsm_task_state
= HSM_ST_POLL
;
3598 ap
->pio_task_timeout
= jiffies
+ ATA_TMOUT_PIO
;
3603 qc
= ata_qc_from_tag(ap
, ap
->active_tag
);
3604 WARN_ON(qc
== NULL
);
3607 if (status
& (ATA_ERR
| ATA_DF
)) {
3608 qc
->err_mask
|= AC_ERR_DEV
;
3609 ap
->hsm_task_state
= HSM_ST_ERR
;
3613 /* transfer data if any */
3614 if (is_atapi_taskfile(&qc
->tf
)) {
3615 /* DRQ=0 means no more data to transfer */
3616 if ((status
& ATA_DRQ
) == 0) {
3617 ap
->hsm_task_state
= HSM_ST_LAST
;
3621 atapi_pio_bytes(qc
);
3623 /* handle BSY=0, DRQ=0 as error */
3624 if ((status
& ATA_DRQ
) == 0) {
3625 qc
->err_mask
|= AC_ERR_HSM
;
3626 ap
->hsm_task_state
= HSM_ST_ERR
;
3634 static void ata_pio_error(struct ata_port
*ap
)
3636 struct ata_queued_cmd
*qc
;
3638 qc
= ata_qc_from_tag(ap
, ap
->active_tag
);
3639 WARN_ON(qc
== NULL
);
3641 if (qc
->tf
.command
!= ATA_CMD_PACKET
)
3642 printk(KERN_WARNING
"ata%u: PIO error\n", ap
->id
);
3644 /* make sure qc->err_mask is available to
3645 * know what's wrong and recover
3647 WARN_ON(qc
->err_mask
== 0);
3649 ap
->hsm_task_state
= HSM_ST_IDLE
;
3651 ata_poll_qc_complete(qc
);
3654 static void ata_pio_task(void *_data
)
3656 struct ata_port
*ap
= _data
;
3657 unsigned long timeout
;
3664 switch (ap
->hsm_task_state
) {
3673 qc_completed
= ata_pio_complete(ap
);
3677 case HSM_ST_LAST_POLL
:
3678 timeout
= ata_pio_poll(ap
);
3688 ata_port_queue_task(ap
, ata_pio_task
, ap
, timeout
);
3689 else if (!qc_completed
)
3694 * atapi_packet_task - Write CDB bytes to hardware
3695 * @_data: Port to which ATAPI device is attached.
3697 * When device has indicated its readiness to accept
3698 * a CDB, this function is called. Send the CDB.
3699 * If DMA is to be performed, exit immediately.
3700 * Otherwise, we are in polling mode, so poll
3701 * status under operation succeeds or fails.
3704 * Kernel thread context (may sleep)
3707 static void atapi_packet_task(void *_data
)
3709 struct ata_port
*ap
= _data
;
3710 struct ata_queued_cmd
*qc
;
3713 qc
= ata_qc_from_tag(ap
, ap
->active_tag
);
3714 WARN_ON(qc
== NULL
);
3715 WARN_ON(!(qc
->flags
& ATA_QCFLAG_ACTIVE
));
3717 /* sleep-wait for BSY to clear */
3718 DPRINTK("busy wait\n");
3719 if (ata_busy_sleep(ap
, ATA_TMOUT_CDB_QUICK
, ATA_TMOUT_CDB
)) {
3720 qc
->err_mask
|= AC_ERR_TIMEOUT
;
3724 /* make sure DRQ is set */
3725 status
= ata_chk_status(ap
);
3726 if ((status
& (ATA_BUSY
| ATA_DRQ
)) != ATA_DRQ
) {
3727 qc
->err_mask
|= AC_ERR_HSM
;
3732 DPRINTK("send cdb\n");
3733 WARN_ON(qc
->dev
->cdb_len
< 12);
3735 if (qc
->tf
.protocol
== ATA_PROT_ATAPI_DMA
||
3736 qc
->tf
.protocol
== ATA_PROT_ATAPI_NODATA
) {
3737 unsigned long flags
;
3739 /* Once we're done issuing command and kicking bmdma,
3740 * irq handler takes over. To not lose irq, we need
3741 * to clear NOINTR flag before sending cdb, but
3742 * interrupt handler shouldn't be invoked before we're
3743 * finished. Hence, the following locking.
3745 spin_lock_irqsave(&ap
->host_set
->lock
, flags
);
3746 ap
->flags
&= ~ATA_FLAG_NOINTR
;
3747 ata_data_xfer(ap
, qc
->cdb
, qc
->dev
->cdb_len
, 1);
3748 if (qc
->tf
.protocol
== ATA_PROT_ATAPI_DMA
)
3749 ap
->ops
->bmdma_start(qc
); /* initiate bmdma */
3750 spin_unlock_irqrestore(&ap
->host_set
->lock
, flags
);
3752 ata_data_xfer(ap
, qc
->cdb
, qc
->dev
->cdb_len
, 1);
3754 /* PIO commands are handled by polling */
3755 ap
->hsm_task_state
= HSM_ST
;
3756 ata_port_queue_task(ap
, ata_pio_task
, ap
, 0);
3762 ata_poll_qc_complete(qc
);
3766 * ata_qc_timeout - Handle timeout of queued command
3767 * @qc: Command that timed out
3769 * Some part of the kernel (currently, only the SCSI layer)
3770 * has noticed that the active command on port @ap has not
3771 * completed after a specified length of time. Handle this
3772 * condition by disabling DMA (if necessary) and completing
3773 * transactions, with error if necessary.
3775 * This also handles the case of the "lost interrupt", where
3776 * for some reason (possibly hardware bug, possibly driver bug)
3777 * an interrupt was not delivered to the driver, even though the
3778 * transaction completed successfully.
3781 * Inherited from SCSI layer (none, can sleep)
3784 static void ata_qc_timeout(struct ata_queued_cmd
*qc
)
3786 struct ata_port
*ap
= qc
->ap
;
3787 struct ata_host_set
*host_set
= ap
->host_set
;
3788 u8 host_stat
= 0, drv_stat
;
3789 unsigned long flags
;
3793 ap
->hsm_task_state
= HSM_ST_IDLE
;
3795 spin_lock_irqsave(&host_set
->lock
, flags
);
3797 switch (qc
->tf
.protocol
) {
3800 case ATA_PROT_ATAPI_DMA
:
3801 host_stat
= ap
->ops
->bmdma_status(ap
);
3803 /* before we do anything else, clear DMA-Start bit */
3804 ap
->ops
->bmdma_stop(qc
);
3810 drv_stat
= ata_chk_status(ap
);
3812 /* ack bmdma irq events */
3813 ap
->ops
->irq_clear(ap
);
3815 printk(KERN_ERR
"ata%u: command 0x%x timeout, stat 0x%x host_stat 0x%x\n",
3816 ap
->id
, qc
->tf
.command
, drv_stat
, host_stat
);
3818 /* complete taskfile transaction */
3819 qc
->err_mask
|= ac_err_mask(drv_stat
);
3823 spin_unlock_irqrestore(&host_set
->lock
, flags
);
3825 ata_eh_qc_complete(qc
);
3831 * ata_eng_timeout - Handle timeout of queued command
3832 * @ap: Port on which timed-out command is active
3834 * Some part of the kernel (currently, only the SCSI layer)
3835 * has noticed that the active command on port @ap has not
3836 * completed after a specified length of time. Handle this
3837 * condition by disabling DMA (if necessary) and completing
3838 * transactions, with error if necessary.
3840 * This also handles the case of the "lost interrupt", where
3841 * for some reason (possibly hardware bug, possibly driver bug)
3842 * an interrupt was not delivered to the driver, even though the
3843 * transaction completed successfully.
3846 * Inherited from SCSI layer (none, can sleep)
3849 void ata_eng_timeout(struct ata_port
*ap
)
3853 ata_qc_timeout(ata_qc_from_tag(ap
, ap
->active_tag
));
3859 * ata_qc_new - Request an available ATA command, for queueing
3860 * @ap: Port associated with device @dev
3861 * @dev: Device from whom we request an available command structure
3867 static struct ata_queued_cmd
*ata_qc_new(struct ata_port
*ap
)
3869 struct ata_queued_cmd
*qc
= NULL
;
3872 for (i
= 0; i
< ATA_MAX_QUEUE
; i
++)
3873 if (!test_and_set_bit(i
, &ap
->qactive
)) {
3874 qc
= ata_qc_from_tag(ap
, i
);
3885 * ata_qc_new_init - Request an available ATA command, and initialize it
3886 * @ap: Port associated with device @dev
3887 * @dev: Device from whom we request an available command structure
3893 struct ata_queued_cmd
*ata_qc_new_init(struct ata_port
*ap
,
3894 struct ata_device
*dev
)
3896 struct ata_queued_cmd
*qc
;
3898 qc
= ata_qc_new(ap
);
3911 * ata_qc_free - free unused ata_queued_cmd
3912 * @qc: Command to complete
3914 * Designed to free unused ata_queued_cmd object
3915 * in case something prevents using it.
3918 * spin_lock_irqsave(host_set lock)
3920 void ata_qc_free(struct ata_queued_cmd
*qc
)
3922 struct ata_port
*ap
= qc
->ap
;
3925 WARN_ON(qc
== NULL
); /* ata_qc_from_tag _might_ return NULL */
3929 if (likely(ata_tag_valid(tag
))) {
3930 if (tag
== ap
->active_tag
)
3931 ap
->active_tag
= ATA_TAG_POISON
;
3932 qc
->tag
= ATA_TAG_POISON
;
3933 clear_bit(tag
, &ap
->qactive
);
3937 void __ata_qc_complete(struct ata_queued_cmd
*qc
)
3939 WARN_ON(qc
== NULL
); /* ata_qc_from_tag _might_ return NULL */
3940 WARN_ON(!(qc
->flags
& ATA_QCFLAG_ACTIVE
));
3942 if (likely(qc
->flags
& ATA_QCFLAG_DMAMAP
))
3945 /* atapi: mark qc as inactive to prevent the interrupt handler
3946 * from completing the command twice later, before the error handler
3947 * is called. (when rc != 0 and atapi request sense is needed)
3949 qc
->flags
&= ~ATA_QCFLAG_ACTIVE
;
3951 /* call completion callback */
3952 qc
->complete_fn(qc
);
3955 static inline int ata_should_dma_map(struct ata_queued_cmd
*qc
)
3957 struct ata_port
*ap
= qc
->ap
;
3959 switch (qc
->tf
.protocol
) {
3961 case ATA_PROT_ATAPI_DMA
:
3964 case ATA_PROT_ATAPI
:
3966 if (ap
->flags
& ATA_FLAG_PIO_DMA
)
3979 * ata_qc_issue - issue taskfile to device
3980 * @qc: command to issue to device
3982 * Prepare an ATA command to submission to device.
3983 * This includes mapping the data into a DMA-able
3984 * area, filling in the S/G table, and finally
3985 * writing the taskfile to hardware, starting the command.
3988 * spin_lock_irqsave(host_set lock)
3991 * Zero on success, AC_ERR_* mask on failure
3994 unsigned int ata_qc_issue(struct ata_queued_cmd
*qc
)
3996 struct ata_port
*ap
= qc
->ap
;
3998 if (ata_should_dma_map(qc
)) {
3999 if (qc
->flags
& ATA_QCFLAG_SG
) {
4000 if (ata_sg_setup(qc
))
4002 } else if (qc
->flags
& ATA_QCFLAG_SINGLE
) {
4003 if (ata_sg_setup_one(qc
))
4007 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
4010 ap
->ops
->qc_prep(qc
);
4012 qc
->ap
->active_tag
= qc
->tag
;
4013 qc
->flags
|= ATA_QCFLAG_ACTIVE
;
4015 return ap
->ops
->qc_issue(qc
);
4018 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
4019 return AC_ERR_SYSTEM
;
4024 * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner
4025 * @qc: command to issue to device
4027 * Using various libata functions and hooks, this function
4028 * starts an ATA command. ATA commands are grouped into
4029 * classes called "protocols", and issuing each type of protocol
4030 * is slightly different.
4032 * May be used as the qc_issue() entry in ata_port_operations.
4035 * spin_lock_irqsave(host_set lock)
4038 * Zero on success, AC_ERR_* mask on failure
4041 unsigned int ata_qc_issue_prot(struct ata_queued_cmd
*qc
)
4043 struct ata_port
*ap
= qc
->ap
;
4045 ata_dev_select(ap
, qc
->dev
->devno
, 1, 0);
4047 switch (qc
->tf
.protocol
) {
4048 case ATA_PROT_NODATA
:
4049 ata_tf_to_host(ap
, &qc
->tf
);
4053 ap
->ops
->tf_load(ap
, &qc
->tf
); /* load tf registers */
4054 ap
->ops
->bmdma_setup(qc
); /* set up bmdma */
4055 ap
->ops
->bmdma_start(qc
); /* initiate bmdma */
4058 case ATA_PROT_PIO
: /* load tf registers, initiate polling pio */
4059 ata_qc_set_polling(qc
);
4060 ata_tf_to_host(ap
, &qc
->tf
);
4061 ap
->hsm_task_state
= HSM_ST
;
4062 ata_port_queue_task(ap
, ata_pio_task
, ap
, 0);
4065 case ATA_PROT_ATAPI
:
4066 ata_qc_set_polling(qc
);
4067 ata_tf_to_host(ap
, &qc
->tf
);
4068 ata_port_queue_task(ap
, atapi_packet_task
, ap
, 0);
4071 case ATA_PROT_ATAPI_NODATA
:
4072 ap
->flags
|= ATA_FLAG_NOINTR
;
4073 ata_tf_to_host(ap
, &qc
->tf
);
4074 ata_port_queue_task(ap
, atapi_packet_task
, ap
, 0);
4077 case ATA_PROT_ATAPI_DMA
:
4078 ap
->flags
|= ATA_FLAG_NOINTR
;
4079 ap
->ops
->tf_load(ap
, &qc
->tf
); /* load tf registers */
4080 ap
->ops
->bmdma_setup(qc
); /* set up bmdma */
4081 ata_port_queue_task(ap
, atapi_packet_task
, ap
, 0);
4086 return AC_ERR_SYSTEM
;
4093 * ata_host_intr - Handle host interrupt for given (port, task)
4094 * @ap: Port on which interrupt arrived (possibly...)
4095 * @qc: Taskfile currently active in engine
4097 * Handle host interrupt for given queued command. Currently,
4098 * only DMA interrupts are handled. All other commands are
4099 * handled via polling with interrupts disabled (nIEN bit).
4102 * spin_lock_irqsave(host_set lock)
4105 * One if interrupt was handled, zero if not (shared irq).
4108 inline unsigned int ata_host_intr (struct ata_port
*ap
,
4109 struct ata_queued_cmd
*qc
)
4111 u8 status
, host_stat
;
4113 switch (qc
->tf
.protocol
) {
4116 case ATA_PROT_ATAPI_DMA
:
4117 case ATA_PROT_ATAPI
:
4118 /* check status of DMA engine */
4119 host_stat
= ap
->ops
->bmdma_status(ap
);
4120 VPRINTK("ata%u: host_stat 0x%X\n", ap
->id
, host_stat
);
4122 /* if it's not our irq... */
4123 if (!(host_stat
& ATA_DMA_INTR
))
4126 /* before we do anything else, clear DMA-Start bit */
4127 ap
->ops
->bmdma_stop(qc
);
4131 case ATA_PROT_ATAPI_NODATA
:
4132 case ATA_PROT_NODATA
:
4133 /* check altstatus */
4134 status
= ata_altstatus(ap
);
4135 if (status
& ATA_BUSY
)
4138 /* check main status, clearing INTRQ */
4139 status
= ata_chk_status(ap
);
4140 if (unlikely(status
& ATA_BUSY
))
4142 DPRINTK("ata%u: protocol %d (dev_stat 0x%X)\n",
4143 ap
->id
, qc
->tf
.protocol
, status
);
4145 /* ack bmdma irq events */
4146 ap
->ops
->irq_clear(ap
);
4148 /* complete taskfile transaction */
4149 qc
->err_mask
|= ac_err_mask(status
);
4150 ata_qc_complete(qc
);
4157 return 1; /* irq handled */
4160 ap
->stats
.idle_irq
++;
4163 if ((ap
->stats
.idle_irq
% 1000) == 0) {
4164 ata_irq_ack(ap
, 0); /* debug trap */
4165 printk(KERN_WARNING
"ata%d: irq trap\n", ap
->id
);
4169 return 0; /* irq not handled */
4173 * ata_interrupt - Default ATA host interrupt handler
4174 * @irq: irq line (unused)
4175 * @dev_instance: pointer to our ata_host_set information structure
4178 * Default interrupt handler for PCI IDE devices. Calls
4179 * ata_host_intr() for each port that is not disabled.
4182 * Obtains host_set lock during operation.
4185 * IRQ_NONE or IRQ_HANDLED.
4188 irqreturn_t
ata_interrupt (int irq
, void *dev_instance
, struct pt_regs
*regs
)
4190 struct ata_host_set
*host_set
= dev_instance
;
4192 unsigned int handled
= 0;
4193 unsigned long flags
;
4195 /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */
4196 spin_lock_irqsave(&host_set
->lock
, flags
);
4198 for (i
= 0; i
< host_set
->n_ports
; i
++) {
4199 struct ata_port
*ap
;
4201 ap
= host_set
->ports
[i
];
4203 !(ap
->flags
& (ATA_FLAG_PORT_DISABLED
| ATA_FLAG_NOINTR
))) {
4204 struct ata_queued_cmd
*qc
;
4206 qc
= ata_qc_from_tag(ap
, ap
->active_tag
);
4207 if (qc
&& (!(qc
->tf
.ctl
& ATA_NIEN
)) &&
4208 (qc
->flags
& ATA_QCFLAG_ACTIVE
))
4209 handled
|= ata_host_intr(ap
, qc
);
4213 spin_unlock_irqrestore(&host_set
->lock
, flags
);
4215 return IRQ_RETVAL(handled
);
4220 * Execute a 'simple' command, that only consists of the opcode 'cmd' itself,
4221 * without filling any other registers
4223 static int ata_do_simple_cmd(struct ata_port
*ap
, struct ata_device
*dev
,
4226 struct ata_taskfile tf
;
4229 ata_tf_init(ap
, &tf
, dev
->devno
);
4232 tf
.flags
|= ATA_TFLAG_DEVICE
;
4233 tf
.protocol
= ATA_PROT_NODATA
;
4235 err
= ata_exec_internal(ap
, dev
, &tf
, DMA_NONE
, NULL
, 0);
4237 printk(KERN_ERR
"%s: ata command failed: %d\n",
4243 static int ata_flush_cache(struct ata_port
*ap
, struct ata_device
*dev
)
4247 if (!ata_try_flush_cache(dev
))
4250 if (ata_id_has_flush_ext(dev
->id
))
4251 cmd
= ATA_CMD_FLUSH_EXT
;
4253 cmd
= ATA_CMD_FLUSH
;
4255 return ata_do_simple_cmd(ap
, dev
, cmd
);
4258 static int ata_standby_drive(struct ata_port
*ap
, struct ata_device
*dev
)
4260 return ata_do_simple_cmd(ap
, dev
, ATA_CMD_STANDBYNOW1
);
4263 static int ata_start_drive(struct ata_port
*ap
, struct ata_device
*dev
)
4265 return ata_do_simple_cmd(ap
, dev
, ATA_CMD_IDLEIMMEDIATE
);
4269 * ata_device_resume - wakeup a previously suspended devices
4270 * @ap: port the device is connected to
4271 * @dev: the device to resume
4273 * Kick the drive back into action, by sending it an idle immediate
4274 * command and making sure its transfer mode matches between drive
4278 int ata_device_resume(struct ata_port
*ap
, struct ata_device
*dev
)
4280 if (ap
->flags
& ATA_FLAG_SUSPENDED
) {
4281 ap
->flags
&= ~ATA_FLAG_SUSPENDED
;
4284 if (!ata_dev_present(dev
))
4286 if (dev
->class == ATA_DEV_ATA
)
4287 ata_start_drive(ap
, dev
);
4293 * ata_device_suspend - prepare a device for suspend
4294 * @ap: port the device is connected to
4295 * @dev: the device to suspend
4297 * Flush the cache on the drive, if appropriate, then issue a
4298 * standbynow command.
4300 int ata_device_suspend(struct ata_port
*ap
, struct ata_device
*dev
)
4302 if (!ata_dev_present(dev
))
4304 if (dev
->class == ATA_DEV_ATA
)
4305 ata_flush_cache(ap
, dev
);
4307 ata_standby_drive(ap
, dev
);
4308 ap
->flags
|= ATA_FLAG_SUSPENDED
;
4313 * ata_port_start - Set port up for dma.
4314 * @ap: Port to initialize
4316 * Called just after data structures for each port are
4317 * initialized. Allocates space for PRD table.
4319 * May be used as the port_start() entry in ata_port_operations.
4322 * Inherited from caller.
4325 int ata_port_start (struct ata_port
*ap
)
4327 struct device
*dev
= ap
->host_set
->dev
;
4330 ap
->prd
= dma_alloc_coherent(dev
, ATA_PRD_TBL_SZ
, &ap
->prd_dma
, GFP_KERNEL
);
4334 rc
= ata_pad_alloc(ap
, dev
);
4336 dma_free_coherent(dev
, ATA_PRD_TBL_SZ
, ap
->prd
, ap
->prd_dma
);
4340 DPRINTK("prd alloc, virt %p, dma %llx\n", ap
->prd
, (unsigned long long) ap
->prd_dma
);
4347 * ata_port_stop - Undo ata_port_start()
4348 * @ap: Port to shut down
4350 * Frees the PRD table.
4352 * May be used as the port_stop() entry in ata_port_operations.
4355 * Inherited from caller.
4358 void ata_port_stop (struct ata_port
*ap
)
4360 struct device
*dev
= ap
->host_set
->dev
;
4362 dma_free_coherent(dev
, ATA_PRD_TBL_SZ
, ap
->prd
, ap
->prd_dma
);
4363 ata_pad_free(ap
, dev
);
4366 void ata_host_stop (struct ata_host_set
*host_set
)
4368 if (host_set
->mmio_base
)
4369 iounmap(host_set
->mmio_base
);
4374 * ata_host_remove - Unregister SCSI host structure with upper layers
4375 * @ap: Port to unregister
4376 * @do_unregister: 1 if we fully unregister, 0 to just stop the port
4379 * Inherited from caller.
4382 static void ata_host_remove(struct ata_port
*ap
, unsigned int do_unregister
)
4384 struct Scsi_Host
*sh
= ap
->host
;
4389 scsi_remove_host(sh
);
4391 ap
->ops
->port_stop(ap
);
4395 * ata_host_init - Initialize an ata_port structure
4396 * @ap: Structure to initialize
4397 * @host: associated SCSI mid-layer structure
4398 * @host_set: Collection of hosts to which @ap belongs
4399 * @ent: Probe information provided by low-level driver
4400 * @port_no: Port number associated with this ata_port
4402 * Initialize a new ata_port structure, and its associated
4406 * Inherited from caller.
4409 static void ata_host_init(struct ata_port
*ap
, struct Scsi_Host
*host
,
4410 struct ata_host_set
*host_set
,
4411 const struct ata_probe_ent
*ent
, unsigned int port_no
)
4417 host
->max_channel
= 1;
4418 host
->unique_id
= ata_unique_id
++;
4419 host
->max_cmd_len
= 12;
4421 ap
->flags
= ATA_FLAG_PORT_DISABLED
;
4422 ap
->id
= host
->unique_id
;
4424 ap
->ctl
= ATA_DEVCTL_OBS
;
4425 ap
->host_set
= host_set
;
4426 ap
->port_no
= port_no
;
4428 ent
->legacy_mode
? ent
->hard_port_no
: port_no
;
4429 ap
->pio_mask
= ent
->pio_mask
;
4430 ap
->mwdma_mask
= ent
->mwdma_mask
;
4431 ap
->udma_mask
= ent
->udma_mask
;
4432 ap
->flags
|= ent
->host_flags
;
4433 ap
->ops
= ent
->port_ops
;
4434 ap
->cbl
= ATA_CBL_NONE
;
4435 ap
->active_tag
= ATA_TAG_POISON
;
4436 ap
->last_ctl
= 0xFF;
4438 INIT_WORK(&ap
->port_task
, NULL
, NULL
);
4439 INIT_LIST_HEAD(&ap
->eh_done_q
);
4441 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
4442 struct ata_device
*dev
= &ap
->device
[i
];
4444 dev
->pio_mask
= UINT_MAX
;
4445 dev
->mwdma_mask
= UINT_MAX
;
4446 dev
->udma_mask
= UINT_MAX
;
4450 ap
->stats
.unhandled_irq
= 1;
4451 ap
->stats
.idle_irq
= 1;
4454 memcpy(&ap
->ioaddr
, &ent
->port
[port_no
], sizeof(struct ata_ioports
));
4458 * ata_host_add - Attach low-level ATA driver to system
4459 * @ent: Information provided by low-level driver
4460 * @host_set: Collections of ports to which we add
4461 * @port_no: Port number associated with this host
4463 * Attach low-level ATA driver to system.
4466 * PCI/etc. bus probe sem.
4469 * New ata_port on success, for NULL on error.
4472 static struct ata_port
* ata_host_add(const struct ata_probe_ent
*ent
,
4473 struct ata_host_set
*host_set
,
4474 unsigned int port_no
)
4476 struct Scsi_Host
*host
;
4477 struct ata_port
*ap
;
4481 host
= scsi_host_alloc(ent
->sht
, sizeof(struct ata_port
));
4485 host
->transportt
= &ata_scsi_transport_template
;
4487 ap
= (struct ata_port
*) &host
->hostdata
[0];
4489 ata_host_init(ap
, host
, host_set
, ent
, port_no
);
4491 rc
= ap
->ops
->port_start(ap
);
4498 scsi_host_put(host
);
4503 * ata_device_add - Register hardware device with ATA and SCSI layers
4504 * @ent: Probe information describing hardware device to be registered
4506 * This function processes the information provided in the probe
4507 * information struct @ent, allocates the necessary ATA and SCSI
4508 * host information structures, initializes them, and registers
4509 * everything with requisite kernel subsystems.
4511 * This function requests irqs, probes the ATA bus, and probes
4515 * PCI/etc. bus probe sem.
4518 * Number of ports registered. Zero on error (no ports registered).
4521 int ata_device_add(const struct ata_probe_ent
*ent
)
4523 unsigned int count
= 0, i
;
4524 struct device
*dev
= ent
->dev
;
4525 struct ata_host_set
*host_set
;
4528 /* alloc a container for our list of ATA ports (buses) */
4529 host_set
= kzalloc(sizeof(struct ata_host_set
) +
4530 (ent
->n_ports
* sizeof(void *)), GFP_KERNEL
);
4533 spin_lock_init(&host_set
->lock
);
4535 host_set
->dev
= dev
;
4536 host_set
->n_ports
= ent
->n_ports
;
4537 host_set
->irq
= ent
->irq
;
4538 host_set
->mmio_base
= ent
->mmio_base
;
4539 host_set
->private_data
= ent
->private_data
;
4540 host_set
->ops
= ent
->port_ops
;
4542 /* register each port bound to this device */
4543 for (i
= 0; i
< ent
->n_ports
; i
++) {
4544 struct ata_port
*ap
;
4545 unsigned long xfer_mode_mask
;
4547 ap
= ata_host_add(ent
, host_set
, i
);
4551 host_set
->ports
[i
] = ap
;
4552 xfer_mode_mask
=(ap
->udma_mask
<< ATA_SHIFT_UDMA
) |
4553 (ap
->mwdma_mask
<< ATA_SHIFT_MWDMA
) |
4554 (ap
->pio_mask
<< ATA_SHIFT_PIO
);
4556 /* print per-port info to dmesg */
4557 printk(KERN_INFO
"ata%u: %cATA max %s cmd 0x%lX ctl 0x%lX "
4558 "bmdma 0x%lX irq %lu\n",
4560 ap
->flags
& ATA_FLAG_SATA
? 'S' : 'P',
4561 ata_mode_string(xfer_mode_mask
),
4562 ap
->ioaddr
.cmd_addr
,
4563 ap
->ioaddr
.ctl_addr
,
4564 ap
->ioaddr
.bmdma_addr
,
4568 host_set
->ops
->irq_clear(ap
);
4575 /* obtain irq, that is shared between channels */
4576 if (request_irq(ent
->irq
, ent
->port_ops
->irq_handler
, ent
->irq_flags
,
4577 DRV_NAME
, host_set
))
4580 /* perform each probe synchronously */
4581 DPRINTK("probe begin\n");
4582 for (i
= 0; i
< count
; i
++) {
4583 struct ata_port
*ap
;
4586 ap
= host_set
->ports
[i
];
4588 DPRINTK("ata%u: bus probe begin\n", ap
->id
);
4589 rc
= ata_bus_probe(ap
);
4590 DPRINTK("ata%u: bus probe end\n", ap
->id
);
4593 /* FIXME: do something useful here?
4594 * Current libata behavior will
4595 * tear down everything when
4596 * the module is removed
4597 * or the h/w is unplugged.
4601 rc
= scsi_add_host(ap
->host
, dev
);
4603 printk(KERN_ERR
"ata%u: scsi_add_host failed\n",
4605 /* FIXME: do something useful here */
4606 /* FIXME: handle unconditional calls to
4607 * scsi_scan_host and ata_host_remove, below,
4613 /* probes are done, now scan each port's disk(s) */
4614 DPRINTK("host probe begin\n");
4615 for (i
= 0; i
< count
; i
++) {
4616 struct ata_port
*ap
= host_set
->ports
[i
];
4618 ata_scsi_scan_host(ap
);
4621 dev_set_drvdata(dev
, host_set
);
4623 VPRINTK("EXIT, returning %u\n", ent
->n_ports
);
4624 return ent
->n_ports
; /* success */
4627 for (i
= 0; i
< count
; i
++) {
4628 ata_host_remove(host_set
->ports
[i
], 1);
4629 scsi_host_put(host_set
->ports
[i
]->host
);
4633 VPRINTK("EXIT, returning 0\n");
4638 * ata_host_set_remove - PCI layer callback for device removal
4639 * @host_set: ATA host set that was removed
4641 * Unregister all objects associated with this host set. Free those
4645 * Inherited from calling layer (may sleep).
4648 void ata_host_set_remove(struct ata_host_set
*host_set
)
4650 struct ata_port
*ap
;
4653 for (i
= 0; i
< host_set
->n_ports
; i
++) {
4654 ap
= host_set
->ports
[i
];
4655 scsi_remove_host(ap
->host
);
4658 free_irq(host_set
->irq
, host_set
);
4660 for (i
= 0; i
< host_set
->n_ports
; i
++) {
4661 ap
= host_set
->ports
[i
];
4663 ata_scsi_release(ap
->host
);
4665 if ((ap
->flags
& ATA_FLAG_NO_LEGACY
) == 0) {
4666 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
4668 if (ioaddr
->cmd_addr
== 0x1f0)
4669 release_region(0x1f0, 8);
4670 else if (ioaddr
->cmd_addr
== 0x170)
4671 release_region(0x170, 8);
4674 scsi_host_put(ap
->host
);
4677 if (host_set
->ops
->host_stop
)
4678 host_set
->ops
->host_stop(host_set
);
4684 * ata_scsi_release - SCSI layer callback hook for host unload
4685 * @host: libata host to be unloaded
4687 * Performs all duties necessary to shut down a libata port...
4688 * Kill port kthread, disable port, and release resources.
4691 * Inherited from SCSI layer.
4697 int ata_scsi_release(struct Scsi_Host
*host
)
4699 struct ata_port
*ap
= (struct ata_port
*) &host
->hostdata
[0];
4704 ap
->ops
->port_disable(ap
);
4705 ata_host_remove(ap
, 0);
4706 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
4707 kfree(ap
->device
[i
].id
);
4714 * ata_std_ports - initialize ioaddr with standard port offsets.
4715 * @ioaddr: IO address structure to be initialized
4717 * Utility function which initializes data_addr, error_addr,
4718 * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr,
4719 * device_addr, status_addr, and command_addr to standard offsets
4720 * relative to cmd_addr.
4722 * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr.
4725 void ata_std_ports(struct ata_ioports
*ioaddr
)
4727 ioaddr
->data_addr
= ioaddr
->cmd_addr
+ ATA_REG_DATA
;
4728 ioaddr
->error_addr
= ioaddr
->cmd_addr
+ ATA_REG_ERR
;
4729 ioaddr
->feature_addr
= ioaddr
->cmd_addr
+ ATA_REG_FEATURE
;
4730 ioaddr
->nsect_addr
= ioaddr
->cmd_addr
+ ATA_REG_NSECT
;
4731 ioaddr
->lbal_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAL
;
4732 ioaddr
->lbam_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAM
;
4733 ioaddr
->lbah_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAH
;
4734 ioaddr
->device_addr
= ioaddr
->cmd_addr
+ ATA_REG_DEVICE
;
4735 ioaddr
->status_addr
= ioaddr
->cmd_addr
+ ATA_REG_STATUS
;
4736 ioaddr
->command_addr
= ioaddr
->cmd_addr
+ ATA_REG_CMD
;
4742 void ata_pci_host_stop (struct ata_host_set
*host_set
)
4744 struct pci_dev
*pdev
= to_pci_dev(host_set
->dev
);
4746 pci_iounmap(pdev
, host_set
->mmio_base
);
4750 * ata_pci_remove_one - PCI layer callback for device removal
4751 * @pdev: PCI device that was removed
4753 * PCI layer indicates to libata via this hook that
4754 * hot-unplug or module unload event has occurred.
4755 * Handle this by unregistering all objects associated
4756 * with this PCI device. Free those objects. Then finally
4757 * release PCI resources and disable device.
4760 * Inherited from PCI layer (may sleep).
4763 void ata_pci_remove_one (struct pci_dev
*pdev
)
4765 struct device
*dev
= pci_dev_to_dev(pdev
);
4766 struct ata_host_set
*host_set
= dev_get_drvdata(dev
);
4768 ata_host_set_remove(host_set
);
4769 pci_release_regions(pdev
);
4770 pci_disable_device(pdev
);
4771 dev_set_drvdata(dev
, NULL
);
4774 /* move to PCI subsystem */
4775 int pci_test_config_bits(struct pci_dev
*pdev
, const struct pci_bits
*bits
)
4777 unsigned long tmp
= 0;
4779 switch (bits
->width
) {
4782 pci_read_config_byte(pdev
, bits
->reg
, &tmp8
);
4788 pci_read_config_word(pdev
, bits
->reg
, &tmp16
);
4794 pci_read_config_dword(pdev
, bits
->reg
, &tmp32
);
4805 return (tmp
== bits
->val
) ? 1 : 0;
4808 int ata_pci_device_suspend(struct pci_dev
*pdev
, pm_message_t state
)
4810 pci_save_state(pdev
);
4811 pci_disable_device(pdev
);
4812 pci_set_power_state(pdev
, PCI_D3hot
);
4816 int ata_pci_device_resume(struct pci_dev
*pdev
)
4818 pci_set_power_state(pdev
, PCI_D0
);
4819 pci_restore_state(pdev
);
4820 pci_enable_device(pdev
);
4821 pci_set_master(pdev
);
4824 #endif /* CONFIG_PCI */
4827 static int __init
ata_init(void)
4829 ata_wq
= create_workqueue("ata");
4833 printk(KERN_DEBUG
"libata version " DRV_VERSION
" loaded.\n");
4837 static void __exit
ata_exit(void)
4839 destroy_workqueue(ata_wq
);
4842 module_init(ata_init
);
4843 module_exit(ata_exit
);
4845 static unsigned long ratelimit_time
;
4846 static spinlock_t ata_ratelimit_lock
= SPIN_LOCK_UNLOCKED
;
4848 int ata_ratelimit(void)
4851 unsigned long flags
;
4853 spin_lock_irqsave(&ata_ratelimit_lock
, flags
);
4855 if (time_after(jiffies
, ratelimit_time
)) {
4857 ratelimit_time
= jiffies
+ (HZ
/5);
4861 spin_unlock_irqrestore(&ata_ratelimit_lock
, flags
);
4867 * libata is essentially a library of internal helper functions for
4868 * low-level ATA host controller drivers. As such, the API/ABI is
4869 * likely to change as new drivers are added and updated.
4870 * Do not depend on ABI/API stability.
4873 EXPORT_SYMBOL_GPL(ata_std_bios_param
);
4874 EXPORT_SYMBOL_GPL(ata_std_ports
);
4875 EXPORT_SYMBOL_GPL(ata_device_add
);
4876 EXPORT_SYMBOL_GPL(ata_host_set_remove
);
4877 EXPORT_SYMBOL_GPL(ata_sg_init
);
4878 EXPORT_SYMBOL_GPL(ata_sg_init_one
);
4879 EXPORT_SYMBOL_GPL(__ata_qc_complete
);
4880 EXPORT_SYMBOL_GPL(ata_qc_issue_prot
);
4881 EXPORT_SYMBOL_GPL(ata_eng_timeout
);
4882 EXPORT_SYMBOL_GPL(ata_tf_load
);
4883 EXPORT_SYMBOL_GPL(ata_tf_read
);
4884 EXPORT_SYMBOL_GPL(ata_noop_dev_select
);
4885 EXPORT_SYMBOL_GPL(ata_std_dev_select
);
4886 EXPORT_SYMBOL_GPL(ata_tf_to_fis
);
4887 EXPORT_SYMBOL_GPL(ata_tf_from_fis
);
4888 EXPORT_SYMBOL_GPL(ata_check_status
);
4889 EXPORT_SYMBOL_GPL(ata_altstatus
);
4890 EXPORT_SYMBOL_GPL(ata_exec_command
);
4891 EXPORT_SYMBOL_GPL(ata_port_start
);
4892 EXPORT_SYMBOL_GPL(ata_port_stop
);
4893 EXPORT_SYMBOL_GPL(ata_host_stop
);
4894 EXPORT_SYMBOL_GPL(ata_interrupt
);
4895 EXPORT_SYMBOL_GPL(ata_qc_prep
);
4896 EXPORT_SYMBOL_GPL(ata_noop_qc_prep
);
4897 EXPORT_SYMBOL_GPL(ata_bmdma_setup
);
4898 EXPORT_SYMBOL_GPL(ata_bmdma_start
);
4899 EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear
);
4900 EXPORT_SYMBOL_GPL(ata_bmdma_status
);
4901 EXPORT_SYMBOL_GPL(ata_bmdma_stop
);
4902 EXPORT_SYMBOL_GPL(ata_port_probe
);
4903 EXPORT_SYMBOL_GPL(sata_phy_reset
);
4904 EXPORT_SYMBOL_GPL(__sata_phy_reset
);
4905 EXPORT_SYMBOL_GPL(ata_bus_reset
);
4906 EXPORT_SYMBOL_GPL(ata_std_probeinit
);
4907 EXPORT_SYMBOL_GPL(ata_std_softreset
);
4908 EXPORT_SYMBOL_GPL(sata_std_hardreset
);
4909 EXPORT_SYMBOL_GPL(ata_std_postreset
);
4910 EXPORT_SYMBOL_GPL(ata_std_probe_reset
);
4911 EXPORT_SYMBOL_GPL(ata_drive_probe_reset
);
4912 EXPORT_SYMBOL_GPL(ata_dev_revalidate
);
4913 EXPORT_SYMBOL_GPL(ata_port_disable
);
4914 EXPORT_SYMBOL_GPL(ata_ratelimit
);
4915 EXPORT_SYMBOL_GPL(ata_busy_sleep
);
4916 EXPORT_SYMBOL_GPL(ata_port_queue_task
);
4917 EXPORT_SYMBOL_GPL(ata_scsi_ioctl
);
4918 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd
);
4919 EXPORT_SYMBOL_GPL(ata_scsi_error
);
4920 EXPORT_SYMBOL_GPL(ata_scsi_slave_config
);
4921 EXPORT_SYMBOL_GPL(ata_scsi_release
);
4922 EXPORT_SYMBOL_GPL(ata_host_intr
);
4923 EXPORT_SYMBOL_GPL(ata_dev_classify
);
4924 EXPORT_SYMBOL_GPL(ata_id_string
);
4925 EXPORT_SYMBOL_GPL(ata_id_c_string
);
4926 EXPORT_SYMBOL_GPL(ata_scsi_simulate
);
4927 EXPORT_SYMBOL_GPL(ata_eh_qc_complete
);
4928 EXPORT_SYMBOL_GPL(ata_eh_qc_retry
);
4930 EXPORT_SYMBOL_GPL(ata_pio_need_iordy
);
4931 EXPORT_SYMBOL_GPL(ata_timing_compute
);
4932 EXPORT_SYMBOL_GPL(ata_timing_merge
);
4935 EXPORT_SYMBOL_GPL(pci_test_config_bits
);
4936 EXPORT_SYMBOL_GPL(ata_pci_host_stop
);
4937 EXPORT_SYMBOL_GPL(ata_pci_init_native_mode
);
4938 EXPORT_SYMBOL_GPL(ata_pci_init_one
);
4939 EXPORT_SYMBOL_GPL(ata_pci_remove_one
);
4940 EXPORT_SYMBOL_GPL(ata_pci_device_suspend
);
4941 EXPORT_SYMBOL_GPL(ata_pci_device_resume
);
4942 EXPORT_SYMBOL_GPL(ata_pci_default_filter
);
4943 EXPORT_SYMBOL_GPL(ata_pci_clear_simplex
);
4944 #endif /* CONFIG_PCI */
4946 EXPORT_SYMBOL_GPL(ata_device_suspend
);
4947 EXPORT_SYMBOL_GPL(ata_device_resume
);
4948 EXPORT_SYMBOL_GPL(ata_scsi_device_suspend
);
4949 EXPORT_SYMBOL_GPL(ata_scsi_device_resume
);