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 unsigned int ata_dev_xfermask(struct ata_port
*ap
,
69 struct ata_device
*dev
);
71 static unsigned int ata_unique_id
= 1;
72 static struct workqueue_struct
*ata_wq
;
74 int atapi_enabled
= 1;
75 module_param(atapi_enabled
, int, 0444);
76 MODULE_PARM_DESC(atapi_enabled
, "Enable discovery of ATAPI devices (0=off, 1=on)");
79 module_param_named(fua
, libata_fua
, int, 0444);
80 MODULE_PARM_DESC(fua
, "FUA support (0=off, 1=on)");
82 MODULE_AUTHOR("Jeff Garzik");
83 MODULE_DESCRIPTION("Library module for ATA devices");
84 MODULE_LICENSE("GPL");
85 MODULE_VERSION(DRV_VERSION
);
89 * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure
90 * @tf: Taskfile to convert
91 * @fis: Buffer into which data will output
92 * @pmp: Port multiplier port
94 * Converts a standard ATA taskfile to a Serial ATA
95 * FIS structure (Register - Host to Device).
98 * Inherited from caller.
101 void ata_tf_to_fis(const struct ata_taskfile
*tf
, u8
*fis
, u8 pmp
)
103 fis
[0] = 0x27; /* Register - Host to Device FIS */
104 fis
[1] = (pmp
& 0xf) | (1 << 7); /* Port multiplier number,
105 bit 7 indicates Command FIS */
106 fis
[2] = tf
->command
;
107 fis
[3] = tf
->feature
;
114 fis
[8] = tf
->hob_lbal
;
115 fis
[9] = tf
->hob_lbam
;
116 fis
[10] = tf
->hob_lbah
;
117 fis
[11] = tf
->hob_feature
;
120 fis
[13] = tf
->hob_nsect
;
131 * ata_tf_from_fis - Convert SATA FIS to ATA taskfile
132 * @fis: Buffer from which data will be input
133 * @tf: Taskfile to output
135 * Converts a serial ATA FIS structure to a standard ATA taskfile.
138 * Inherited from caller.
141 void ata_tf_from_fis(const u8
*fis
, struct ata_taskfile
*tf
)
143 tf
->command
= fis
[2]; /* status */
144 tf
->feature
= fis
[3]; /* error */
151 tf
->hob_lbal
= fis
[8];
152 tf
->hob_lbam
= fis
[9];
153 tf
->hob_lbah
= fis
[10];
156 tf
->hob_nsect
= fis
[13];
159 static const u8 ata_rw_cmds
[] = {
163 ATA_CMD_READ_MULTI_EXT
,
164 ATA_CMD_WRITE_MULTI_EXT
,
168 ATA_CMD_WRITE_MULTI_FUA_EXT
,
172 ATA_CMD_PIO_READ_EXT
,
173 ATA_CMD_PIO_WRITE_EXT
,
186 ATA_CMD_WRITE_FUA_EXT
190 * ata_rwcmd_protocol - set taskfile r/w commands and protocol
191 * @qc: command to examine and configure
193 * Examine the device configuration and tf->flags to calculate
194 * the proper read/write commands and protocol to use.
199 int ata_rwcmd_protocol(struct ata_queued_cmd
*qc
)
201 struct ata_taskfile
*tf
= &qc
->tf
;
202 struct ata_device
*dev
= qc
->dev
;
205 int index
, fua
, lba48
, write
;
207 fua
= (tf
->flags
& ATA_TFLAG_FUA
) ? 4 : 0;
208 lba48
= (tf
->flags
& ATA_TFLAG_LBA48
) ? 2 : 0;
209 write
= (tf
->flags
& ATA_TFLAG_WRITE
) ? 1 : 0;
211 if (dev
->flags
& ATA_DFLAG_PIO
) {
212 tf
->protocol
= ATA_PROT_PIO
;
213 index
= dev
->multi_count
? 0 : 8;
214 } else if (lba48
&& (qc
->ap
->flags
& ATA_FLAG_PIO_LBA48
)) {
215 /* Unable to use DMA due to host limitation */
216 tf
->protocol
= ATA_PROT_PIO
;
217 index
= dev
->multi_count
? 0 : 8;
219 tf
->protocol
= ATA_PROT_DMA
;
223 cmd
= ata_rw_cmds
[index
+ fua
+ lba48
+ write
];
232 * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask
233 * @pio_mask: pio_mask
234 * @mwdma_mask: mwdma_mask
235 * @udma_mask: udma_mask
237 * Pack @pio_mask, @mwdma_mask and @udma_mask into a single
238 * unsigned int xfer_mask.
246 static unsigned int ata_pack_xfermask(unsigned int pio_mask
,
247 unsigned int mwdma_mask
,
248 unsigned int udma_mask
)
250 return ((pio_mask
<< ATA_SHIFT_PIO
) & ATA_MASK_PIO
) |
251 ((mwdma_mask
<< ATA_SHIFT_MWDMA
) & ATA_MASK_MWDMA
) |
252 ((udma_mask
<< ATA_SHIFT_UDMA
) & ATA_MASK_UDMA
);
256 * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks
257 * @xfer_mask: xfer_mask to unpack
258 * @pio_mask: resulting pio_mask
259 * @mwdma_mask: resulting mwdma_mask
260 * @udma_mask: resulting udma_mask
262 * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask.
263 * Any NULL distination masks will be ignored.
265 static void ata_unpack_xfermask(unsigned int xfer_mask
,
266 unsigned int *pio_mask
,
267 unsigned int *mwdma_mask
,
268 unsigned int *udma_mask
)
271 *pio_mask
= (xfer_mask
& ATA_MASK_PIO
) >> ATA_SHIFT_PIO
;
273 *mwdma_mask
= (xfer_mask
& ATA_MASK_MWDMA
) >> ATA_SHIFT_MWDMA
;
275 *udma_mask
= (xfer_mask
& ATA_MASK_UDMA
) >> ATA_SHIFT_UDMA
;
278 static const struct ata_xfer_ent
{
279 unsigned int shift
, bits
;
282 { ATA_SHIFT_PIO
, ATA_BITS_PIO
, XFER_PIO_0
},
283 { ATA_SHIFT_MWDMA
, ATA_BITS_MWDMA
, XFER_MW_DMA_0
},
284 { ATA_SHIFT_UDMA
, ATA_BITS_UDMA
, XFER_UDMA_0
},
289 * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask
290 * @xfer_mask: xfer_mask of interest
292 * Return matching XFER_* value for @xfer_mask. Only the highest
293 * bit of @xfer_mask is considered.
299 * Matching XFER_* value, 0 if no match found.
301 static u8
ata_xfer_mask2mode(unsigned int xfer_mask
)
303 int highbit
= fls(xfer_mask
) - 1;
304 const struct ata_xfer_ent
*ent
;
306 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
307 if (highbit
>= ent
->shift
&& highbit
< ent
->shift
+ ent
->bits
)
308 return ent
->base
+ highbit
- ent
->shift
;
313 * ata_xfer_mode2mask - Find matching xfer_mask for XFER_*
314 * @xfer_mode: XFER_* of interest
316 * Return matching xfer_mask for @xfer_mode.
322 * Matching xfer_mask, 0 if no match found.
324 static unsigned int ata_xfer_mode2mask(u8 xfer_mode
)
326 const struct ata_xfer_ent
*ent
;
328 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
329 if (xfer_mode
>= ent
->base
&& xfer_mode
< ent
->base
+ ent
->bits
)
330 return 1 << (ent
->shift
+ xfer_mode
- ent
->base
);
335 * ata_xfer_mode2shift - Find matching xfer_shift for XFER_*
336 * @xfer_mode: XFER_* of interest
338 * Return matching xfer_shift for @xfer_mode.
344 * Matching xfer_shift, -1 if no match found.
346 static int ata_xfer_mode2shift(unsigned int xfer_mode
)
348 const struct ata_xfer_ent
*ent
;
350 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
351 if (xfer_mode
>= ent
->base
&& xfer_mode
< ent
->base
+ ent
->bits
)
357 * ata_mode_string - convert xfer_mask to string
358 * @xfer_mask: mask of bits supported; only highest bit counts.
360 * Determine string which represents the highest speed
361 * (highest bit in @modemask).
367 * Constant C string representing highest speed listed in
368 * @mode_mask, or the constant C string "<n/a>".
370 static const char *ata_mode_string(unsigned int xfer_mask
)
372 static const char * const xfer_mode_str
[] = {
392 highbit
= fls(xfer_mask
) - 1;
393 if (highbit
>= 0 && highbit
< ARRAY_SIZE(xfer_mode_str
))
394 return xfer_mode_str
[highbit
];
399 * ata_pio_devchk - PATA device presence detection
400 * @ap: ATA channel to examine
401 * @device: Device to examine (starting at zero)
403 * This technique was originally described in
404 * Hale Landis's ATADRVR (www.ata-atapi.com), and
405 * later found its way into the ATA/ATAPI spec.
407 * Write a pattern to the ATA shadow registers,
408 * and if a device is present, it will respond by
409 * correctly storing and echoing back the
410 * ATA shadow register contents.
416 static unsigned int ata_pio_devchk(struct ata_port
*ap
,
419 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
422 ap
->ops
->dev_select(ap
, device
);
424 outb(0x55, ioaddr
->nsect_addr
);
425 outb(0xaa, ioaddr
->lbal_addr
);
427 outb(0xaa, ioaddr
->nsect_addr
);
428 outb(0x55, ioaddr
->lbal_addr
);
430 outb(0x55, ioaddr
->nsect_addr
);
431 outb(0xaa, ioaddr
->lbal_addr
);
433 nsect
= inb(ioaddr
->nsect_addr
);
434 lbal
= inb(ioaddr
->lbal_addr
);
436 if ((nsect
== 0x55) && (lbal
== 0xaa))
437 return 1; /* we found a device */
439 return 0; /* nothing found */
443 * ata_mmio_devchk - PATA device presence detection
444 * @ap: ATA channel to examine
445 * @device: Device to examine (starting at zero)
447 * This technique was originally described in
448 * Hale Landis's ATADRVR (www.ata-atapi.com), and
449 * later found its way into the ATA/ATAPI spec.
451 * Write a pattern to the ATA shadow registers,
452 * and if a device is present, it will respond by
453 * correctly storing and echoing back the
454 * ATA shadow register contents.
460 static unsigned int ata_mmio_devchk(struct ata_port
*ap
,
463 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
466 ap
->ops
->dev_select(ap
, device
);
468 writeb(0x55, (void __iomem
*) ioaddr
->nsect_addr
);
469 writeb(0xaa, (void __iomem
*) ioaddr
->lbal_addr
);
471 writeb(0xaa, (void __iomem
*) ioaddr
->nsect_addr
);
472 writeb(0x55, (void __iomem
*) ioaddr
->lbal_addr
);
474 writeb(0x55, (void __iomem
*) ioaddr
->nsect_addr
);
475 writeb(0xaa, (void __iomem
*) ioaddr
->lbal_addr
);
477 nsect
= readb((void __iomem
*) ioaddr
->nsect_addr
);
478 lbal
= readb((void __iomem
*) ioaddr
->lbal_addr
);
480 if ((nsect
== 0x55) && (lbal
== 0xaa))
481 return 1; /* we found a device */
483 return 0; /* nothing found */
487 * ata_devchk - PATA device presence detection
488 * @ap: ATA channel to examine
489 * @device: Device to examine (starting at zero)
491 * Dispatch ATA device presence detection, depending
492 * on whether we are using PIO or MMIO to talk to the
493 * ATA shadow registers.
499 static unsigned int ata_devchk(struct ata_port
*ap
,
502 if (ap
->flags
& ATA_FLAG_MMIO
)
503 return ata_mmio_devchk(ap
, device
);
504 return ata_pio_devchk(ap
, device
);
508 * ata_dev_classify - determine device type based on ATA-spec signature
509 * @tf: ATA taskfile register set for device to be identified
511 * Determine from taskfile register contents whether a device is
512 * ATA or ATAPI, as per "Signature and persistence" section
513 * of ATA/PI spec (volume 1, sect 5.14).
519 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, or %ATA_DEV_UNKNOWN
520 * the event of failure.
523 unsigned int ata_dev_classify(const struct ata_taskfile
*tf
)
525 /* Apple's open source Darwin code hints that some devices only
526 * put a proper signature into the LBA mid/high registers,
527 * So, we only check those. It's sufficient for uniqueness.
530 if (((tf
->lbam
== 0) && (tf
->lbah
== 0)) ||
531 ((tf
->lbam
== 0x3c) && (tf
->lbah
== 0xc3))) {
532 DPRINTK("found ATA device by sig\n");
536 if (((tf
->lbam
== 0x14) && (tf
->lbah
== 0xeb)) ||
537 ((tf
->lbam
== 0x69) && (tf
->lbah
== 0x96))) {
538 DPRINTK("found ATAPI device by sig\n");
539 return ATA_DEV_ATAPI
;
542 DPRINTK("unknown device\n");
543 return ATA_DEV_UNKNOWN
;
547 * ata_dev_try_classify - Parse returned ATA device signature
548 * @ap: ATA channel to examine
549 * @device: Device to examine (starting at zero)
550 * @r_err: Value of error register on completion
552 * After an event -- SRST, E.D.D., or SATA COMRESET -- occurs,
553 * an ATA/ATAPI-defined set of values is placed in the ATA
554 * shadow registers, indicating the results of device detection
557 * Select the ATA device, and read the values from the ATA shadow
558 * registers. Then parse according to the Error register value,
559 * and the spec-defined values examined by ata_dev_classify().
565 * Device type - %ATA_DEV_ATA, %ATA_DEV_ATAPI or %ATA_DEV_NONE.
569 ata_dev_try_classify(struct ata_port
*ap
, unsigned int device
, u8
*r_err
)
571 struct ata_taskfile tf
;
575 ap
->ops
->dev_select(ap
, device
);
577 memset(&tf
, 0, sizeof(tf
));
579 ap
->ops
->tf_read(ap
, &tf
);
584 /* see if device passed diags */
587 else if ((device
== 0) && (err
== 0x81))
592 /* determine if device is ATA or ATAPI */
593 class = ata_dev_classify(&tf
);
595 if (class == ATA_DEV_UNKNOWN
)
597 if ((class == ATA_DEV_ATA
) && (ata_chk_status(ap
) == 0))
603 * ata_id_string - Convert IDENTIFY DEVICE page into string
604 * @id: IDENTIFY DEVICE results we will examine
605 * @s: string into which data is output
606 * @ofs: offset into identify device page
607 * @len: length of string to return. must be an even number.
609 * The strings in the IDENTIFY DEVICE page are broken up into
610 * 16-bit chunks. Run through the string, and output each
611 * 8-bit chunk linearly, regardless of platform.
617 void ata_id_string(const u16
*id
, unsigned char *s
,
618 unsigned int ofs
, unsigned int len
)
637 * ata_id_c_string - Convert IDENTIFY DEVICE page into C string
638 * @id: IDENTIFY DEVICE results we will examine
639 * @s: string into which data is output
640 * @ofs: offset into identify device page
641 * @len: length of string to return. must be an odd number.
643 * This function is identical to ata_id_string except that it
644 * trims trailing spaces and terminates the resulting string with
645 * null. @len must be actual maximum length (even number) + 1.
650 void ata_id_c_string(const u16
*id
, unsigned char *s
,
651 unsigned int ofs
, unsigned int len
)
657 ata_id_string(id
, s
, ofs
, len
- 1);
659 p
= s
+ strnlen(s
, len
- 1);
660 while (p
> s
&& p
[-1] == ' ')
665 static u64
ata_id_n_sectors(const u16
*id
)
667 if (ata_id_has_lba(id
)) {
668 if (ata_id_has_lba48(id
))
669 return ata_id_u64(id
, 100);
671 return ata_id_u32(id
, 60);
673 if (ata_id_current_chs_valid(id
))
674 return ata_id_u32(id
, 57);
676 return id
[1] * id
[3] * id
[6];
681 * ata_noop_dev_select - Select device 0/1 on ATA bus
682 * @ap: ATA channel to manipulate
683 * @device: ATA device (numbered from zero) to select
685 * This function performs no actual function.
687 * May be used as the dev_select() entry in ata_port_operations.
692 void ata_noop_dev_select (struct ata_port
*ap
, unsigned int device
)
698 * ata_std_dev_select - Select device 0/1 on ATA bus
699 * @ap: ATA channel to manipulate
700 * @device: ATA device (numbered from zero) to select
702 * Use the method defined in the ATA specification to
703 * make either device 0, or device 1, active on the
704 * ATA channel. Works with both PIO and MMIO.
706 * May be used as the dev_select() entry in ata_port_operations.
712 void ata_std_dev_select (struct ata_port
*ap
, unsigned int device
)
717 tmp
= ATA_DEVICE_OBS
;
719 tmp
= ATA_DEVICE_OBS
| ATA_DEV1
;
721 if (ap
->flags
& ATA_FLAG_MMIO
) {
722 writeb(tmp
, (void __iomem
*) ap
->ioaddr
.device_addr
);
724 outb(tmp
, ap
->ioaddr
.device_addr
);
726 ata_pause(ap
); /* needed; also flushes, for mmio */
730 * ata_dev_select - Select device 0/1 on ATA bus
731 * @ap: ATA channel to manipulate
732 * @device: ATA device (numbered from zero) to select
733 * @wait: non-zero to wait for Status register BSY bit to clear
734 * @can_sleep: non-zero if context allows sleeping
736 * Use the method defined in the ATA specification to
737 * make either device 0, or device 1, active on the
740 * This is a high-level version of ata_std_dev_select(),
741 * which additionally provides the services of inserting
742 * the proper pauses and status polling, where needed.
748 void ata_dev_select(struct ata_port
*ap
, unsigned int device
,
749 unsigned int wait
, unsigned int can_sleep
)
751 VPRINTK("ENTER, ata%u: device %u, wait %u\n",
752 ap
->id
, device
, wait
);
757 ap
->ops
->dev_select(ap
, device
);
760 if (can_sleep
&& ap
->device
[device
].class == ATA_DEV_ATAPI
)
767 * ata_dump_id - IDENTIFY DEVICE info debugging output
768 * @id: IDENTIFY DEVICE page to dump
770 * Dump selected 16-bit words from the given IDENTIFY DEVICE
777 static inline void ata_dump_id(const u16
*id
)
779 DPRINTK("49==0x%04x "
789 DPRINTK("80==0x%04x "
799 DPRINTK("88==0x%04x "
806 * ata_id_xfermask - Compute xfermask from the given IDENTIFY data
807 * @id: IDENTIFY data to compute xfer mask from
809 * Compute the xfermask for this device. This is not as trivial
810 * as it seems if we must consider early devices correctly.
812 * FIXME: pre IDE drive timing (do we care ?).
820 static unsigned int ata_id_xfermask(const u16
*id
)
822 unsigned int pio_mask
, mwdma_mask
, udma_mask
;
824 /* Usual case. Word 53 indicates word 64 is valid */
825 if (id
[ATA_ID_FIELD_VALID
] & (1 << 1)) {
826 pio_mask
= id
[ATA_ID_PIO_MODES
] & 0x03;
830 /* If word 64 isn't valid then Word 51 high byte holds
831 * the PIO timing number for the maximum. Turn it into
834 pio_mask
= (2 << (id
[ATA_ID_OLD_PIO_MODES
] & 0xFF)) - 1 ;
836 /* But wait.. there's more. Design your standards by
837 * committee and you too can get a free iordy field to
838 * process. However its the speeds not the modes that
839 * are supported... Note drivers using the timing API
840 * will get this right anyway
844 mwdma_mask
= id
[ATA_ID_MWDMA_MODES
] & 0x07;
847 if (id
[ATA_ID_FIELD_VALID
] & (1 << 2))
848 udma_mask
= id
[ATA_ID_UDMA_MODES
] & 0xff;
850 return ata_pack_xfermask(pio_mask
, mwdma_mask
, udma_mask
);
854 * ata_port_queue_task - Queue port_task
855 * @ap: The ata_port to queue port_task for
857 * Schedule @fn(@data) for execution after @delay jiffies using
858 * port_task. There is one port_task per port and it's the
859 * user(low level driver)'s responsibility to make sure that only
860 * one task is active at any given time.
862 * libata core layer takes care of synchronization between
863 * port_task and EH. ata_port_queue_task() may be ignored for EH
867 * Inherited from caller.
869 void ata_port_queue_task(struct ata_port
*ap
, void (*fn
)(void *), void *data
,
874 if (ap
->flags
& ATA_FLAG_FLUSH_PORT_TASK
)
877 PREPARE_WORK(&ap
->port_task
, fn
, data
);
880 rc
= queue_work(ata_wq
, &ap
->port_task
);
882 rc
= queue_delayed_work(ata_wq
, &ap
->port_task
, delay
);
884 /* rc == 0 means that another user is using port task */
889 * ata_port_flush_task - Flush port_task
890 * @ap: The ata_port to flush port_task for
892 * After this function completes, port_task is guranteed not to
893 * be running or scheduled.
896 * Kernel thread context (may sleep)
898 void ata_port_flush_task(struct ata_port
*ap
)
904 spin_lock_irqsave(&ap
->host_set
->lock
, flags
);
905 ap
->flags
|= ATA_FLAG_FLUSH_PORT_TASK
;
906 spin_unlock_irqrestore(&ap
->host_set
->lock
, flags
);
908 DPRINTK("flush #1\n");
909 flush_workqueue(ata_wq
);
912 * At this point, if a task is running, it's guaranteed to see
913 * the FLUSH flag; thus, it will never queue pio tasks again.
916 if (!cancel_delayed_work(&ap
->port_task
)) {
917 DPRINTK("flush #2\n");
918 flush_workqueue(ata_wq
);
921 spin_lock_irqsave(&ap
->host_set
->lock
, flags
);
922 ap
->flags
&= ~ATA_FLAG_FLUSH_PORT_TASK
;
923 spin_unlock_irqrestore(&ap
->host_set
->lock
, flags
);
928 void ata_qc_complete_internal(struct ata_queued_cmd
*qc
)
930 struct completion
*waiting
= qc
->private_data
;
932 qc
->ap
->ops
->tf_read(qc
->ap
, &qc
->tf
);
937 * ata_exec_internal - execute libata internal command
938 * @ap: Port to which the command is sent
939 * @dev: Device to which the command is sent
940 * @tf: Taskfile registers for the command and the result
941 * @dma_dir: Data tranfer direction of the command
942 * @buf: Data buffer of the command
943 * @buflen: Length of data buffer
945 * Executes libata internal command with timeout. @tf contains
946 * command on entry and result on return. Timeout and error
947 * conditions are reported via return value. No recovery action
948 * is taken after a command times out. It's caller's duty to
949 * clean up after timeout.
952 * None. Should be called with kernel context, might sleep.
956 ata_exec_internal(struct ata_port
*ap
, struct ata_device
*dev
,
957 struct ata_taskfile
*tf
,
958 int dma_dir
, void *buf
, unsigned int buflen
)
960 u8 command
= tf
->command
;
961 struct ata_queued_cmd
*qc
;
962 DECLARE_COMPLETION(wait
);
964 unsigned int err_mask
;
966 spin_lock_irqsave(&ap
->host_set
->lock
, flags
);
968 qc
= ata_qc_new_init(ap
, dev
);
972 qc
->dma_dir
= dma_dir
;
973 if (dma_dir
!= DMA_NONE
) {
974 ata_sg_init_one(qc
, buf
, buflen
);
975 qc
->nsect
= buflen
/ ATA_SECT_SIZE
;
978 qc
->private_data
= &wait
;
979 qc
->complete_fn
= ata_qc_complete_internal
;
981 qc
->err_mask
= ata_qc_issue(qc
);
985 spin_unlock_irqrestore(&ap
->host_set
->lock
, flags
);
987 if (!wait_for_completion_timeout(&wait
, ATA_TMOUT_INTERNAL
)) {
988 ata_port_flush_task(ap
);
990 spin_lock_irqsave(&ap
->host_set
->lock
, flags
);
992 /* We're racing with irq here. If we lose, the
993 * following test prevents us from completing the qc
994 * again. If completion irq occurs after here but
995 * before the caller cleans up, it will result in a
996 * spurious interrupt. We can live with that.
998 if (qc
->flags
& ATA_QCFLAG_ACTIVE
) {
999 qc
->err_mask
= AC_ERR_TIMEOUT
;
1000 ata_qc_complete(qc
);
1001 printk(KERN_WARNING
"ata%u: qc timeout (cmd 0x%x)\n",
1005 spin_unlock_irqrestore(&ap
->host_set
->lock
, flags
);
1009 err_mask
= qc
->err_mask
;
1017 * ata_pio_need_iordy - check if iordy needed
1020 * Check if the current speed of the device requires IORDY. Used
1021 * by various controllers for chip configuration.
1024 unsigned int ata_pio_need_iordy(const struct ata_device
*adev
)
1027 int speed
= adev
->pio_mode
- XFER_PIO_0
;
1034 /* If we have no drive specific rule, then PIO 2 is non IORDY */
1036 if (adev
->id
[ATA_ID_FIELD_VALID
] & 2) { /* EIDE */
1037 pio
= adev
->id
[ATA_ID_EIDE_PIO
];
1038 /* Is the speed faster than the drive allows non IORDY ? */
1040 /* This is cycle times not frequency - watch the logic! */
1041 if (pio
> 240) /* PIO2 is 240nS per cycle */
1050 * ata_dev_read_id - Read ID data from the specified device
1051 * @ap: port on which target device resides
1052 * @dev: target device
1053 * @p_class: pointer to class of the target device (may be changed)
1054 * @post_reset: is this read ID post-reset?
1055 * @p_id: read IDENTIFY page (newly allocated)
1057 * Read ID data from the specified device. ATA_CMD_ID_ATA is
1058 * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
1059 * devices. This function also takes care of EDD signature
1060 * misreporting (to be removed once EDD support is gone) and
1061 * issues ATA_CMD_INIT_DEV_PARAMS for pre-ATA4 drives.
1064 * Kernel thread context (may sleep)
1067 * 0 on success, -errno otherwise.
1069 static int ata_dev_read_id(struct ata_port
*ap
, struct ata_device
*dev
,
1070 unsigned int *p_class
, int post_reset
, u16
**p_id
)
1072 unsigned int class = *p_class
;
1073 unsigned int using_edd
;
1074 struct ata_taskfile tf
;
1075 unsigned int err_mask
= 0;
1080 DPRINTK("ENTER, host %u, dev %u\n", ap
->id
, dev
->devno
);
1082 if (ap
->ops
->probe_reset
||
1083 ap
->flags
& (ATA_FLAG_SRST
| ATA_FLAG_SATA_RESET
))
1088 ata_dev_select(ap
, dev
->devno
, 1, 1); /* select device 0/1 */
1090 id
= kmalloc(sizeof(id
[0]) * ATA_ID_WORDS
, GFP_KERNEL
);
1093 reason
= "out of memory";
1098 ata_tf_init(ap
, &tf
, dev
->devno
);
1102 tf
.command
= ATA_CMD_ID_ATA
;
1105 tf
.command
= ATA_CMD_ID_ATAPI
;
1109 reason
= "unsupported class";
1113 tf
.protocol
= ATA_PROT_PIO
;
1115 err_mask
= ata_exec_internal(ap
, dev
, &tf
, DMA_FROM_DEVICE
,
1116 id
, sizeof(id
[0]) * ATA_ID_WORDS
);
1120 reason
= "I/O error";
1122 if (err_mask
& ~AC_ERR_DEV
)
1126 * arg! EDD works for all test cases, but seems to return
1127 * the ATA signature for some ATAPI devices. Until the
1128 * reason for this is found and fixed, we fix up the mess
1129 * here. If IDENTIFY DEVICE returns command aborted
1130 * (as ATAPI devices do), then we issue an
1131 * IDENTIFY PACKET DEVICE.
1133 * ATA software reset (SRST, the default) does not appear
1134 * to have this problem.
1136 if ((using_edd
) && (class == ATA_DEV_ATA
)) {
1137 u8 err
= tf
.feature
;
1138 if (err
& ATA_ABORTED
) {
1139 class = ATA_DEV_ATAPI
;
1146 swap_buf_le16(id
, ATA_ID_WORDS
);
1149 if ((class == ATA_DEV_ATA
) != ata_id_is_ata(id
)) {
1151 reason
= "device reports illegal type";
1155 if (post_reset
&& class == ATA_DEV_ATA
) {
1157 * The exact sequence expected by certain pre-ATA4 drives is:
1160 * INITIALIZE DEVICE PARAMETERS
1162 * Some drives were very specific about that exact sequence.
1164 if (ata_id_major_version(id
) < 4 || !ata_id_has_lba(id
)) {
1165 err_mask
= ata_dev_init_params(ap
, dev
);
1168 reason
= "INIT_DEV_PARAMS failed";
1172 /* current CHS translation info (id[53-58]) might be
1173 * changed. reread the identify device info.
1185 printk(KERN_WARNING
"ata%u: dev %u failed to IDENTIFY (%s)\n",
1186 ap
->id
, dev
->devno
, reason
);
1191 static inline u8
ata_dev_knobble(const struct ata_port
*ap
,
1192 struct ata_device
*dev
)
1194 return ((ap
->cbl
== ATA_CBL_SATA
) && (!ata_id_is_sata(dev
->id
)));
1198 * ata_dev_configure - Configure the specified ATA/ATAPI device
1199 * @ap: Port on which target device resides
1200 * @dev: Target device to configure
1201 * @print_info: Enable device info printout
1203 * Configure @dev according to @dev->id. Generic and low-level
1204 * driver specific fixups are also applied.
1207 * Kernel thread context (may sleep)
1210 * 0 on success, -errno otherwise
1212 static int ata_dev_configure(struct ata_port
*ap
, struct ata_device
*dev
,
1215 const u16
*id
= dev
->id
;
1216 unsigned int xfer_mask
;
1219 if (!ata_dev_present(dev
)) {
1220 DPRINTK("ENTER/EXIT (host %u, dev %u) -- nodev\n",
1221 ap
->id
, dev
->devno
);
1225 DPRINTK("ENTER, host %u, dev %u\n", ap
->id
, dev
->devno
);
1227 /* print device capabilities */
1229 printk(KERN_DEBUG
"ata%u: dev %u cfg 49:%04x 82:%04x 83:%04x "
1230 "84:%04x 85:%04x 86:%04x 87:%04x 88:%04x\n",
1231 ap
->id
, dev
->devno
, id
[49], id
[82], id
[83],
1232 id
[84], id
[85], id
[86], id
[87], id
[88]);
1234 /* initialize to-be-configured parameters */
1236 dev
->max_sectors
= 0;
1244 * common ATA, ATAPI feature tests
1247 /* find max transfer mode; for printk only */
1248 xfer_mask
= ata_id_xfermask(id
);
1252 /* ATA-specific feature tests */
1253 if (dev
->class == ATA_DEV_ATA
) {
1254 dev
->n_sectors
= ata_id_n_sectors(id
);
1256 if (ata_id_has_lba(id
)) {
1257 const char *lba_desc
;
1260 dev
->flags
|= ATA_DFLAG_LBA
;
1261 if (ata_id_has_lba48(id
)) {
1262 dev
->flags
|= ATA_DFLAG_LBA48
;
1266 /* print device info to dmesg */
1268 printk(KERN_INFO
"ata%u: dev %u ATA-%d, "
1269 "max %s, %Lu sectors: %s\n",
1271 ata_id_major_version(id
),
1272 ata_mode_string(xfer_mask
),
1273 (unsigned long long)dev
->n_sectors
,
1278 /* Default translation */
1279 dev
->cylinders
= id
[1];
1281 dev
->sectors
= id
[6];
1283 if (ata_id_current_chs_valid(id
)) {
1284 /* Current CHS translation is valid. */
1285 dev
->cylinders
= id
[54];
1286 dev
->heads
= id
[55];
1287 dev
->sectors
= id
[56];
1290 /* print device info to dmesg */
1292 printk(KERN_INFO
"ata%u: dev %u ATA-%d, "
1293 "max %s, %Lu sectors: CHS %u/%u/%u\n",
1295 ata_id_major_version(id
),
1296 ata_mode_string(xfer_mask
),
1297 (unsigned long long)dev
->n_sectors
,
1298 dev
->cylinders
, dev
->heads
, dev
->sectors
);
1304 /* ATAPI-specific feature tests */
1305 else if (dev
->class == ATA_DEV_ATAPI
) {
1306 rc
= atapi_cdb_len(id
);
1307 if ((rc
< 12) || (rc
> ATAPI_CDB_LEN
)) {
1308 printk(KERN_WARNING
"ata%u: unsupported CDB len\n", ap
->id
);
1312 dev
->cdb_len
= (unsigned int) rc
;
1314 /* print device info to dmesg */
1316 printk(KERN_INFO
"ata%u: dev %u ATAPI, max %s\n",
1317 ap
->id
, dev
->devno
, ata_mode_string(xfer_mask
));
1320 ap
->host
->max_cmd_len
= 0;
1321 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
1322 ap
->host
->max_cmd_len
= max_t(unsigned int,
1323 ap
->host
->max_cmd_len
,
1324 ap
->device
[i
].cdb_len
);
1326 /* limit bridge transfers to udma5, 200 sectors */
1327 if (ata_dev_knobble(ap
, dev
)) {
1329 printk(KERN_INFO
"ata%u(%u): applying bridge limits\n",
1330 ap
->id
, dev
->devno
);
1331 ap
->udma_mask
&= ATA_UDMA5
;
1332 dev
->max_sectors
= ATA_MAX_SECTORS
;
1335 if (ap
->ops
->dev_config
)
1336 ap
->ops
->dev_config(ap
, dev
);
1338 DPRINTK("EXIT, drv_stat = 0x%x\n", ata_chk_status(ap
));
1342 printk(KERN_WARNING
"ata%u: dev %u not supported, ignoring\n",
1343 ap
->id
, dev
->devno
);
1344 DPRINTK("EXIT, err\n");
1349 * ata_bus_probe - Reset and probe ATA bus
1352 * Master ATA bus probing function. Initiates a hardware-dependent
1353 * bus reset, then attempts to identify any devices found on
1357 * PCI/etc. bus probe sem.
1360 * Zero on success, non-zero on error.
1363 static int ata_bus_probe(struct ata_port
*ap
)
1365 unsigned int classes
[ATA_MAX_DEVICES
];
1366 unsigned int i
, rc
, found
= 0;
1370 /* reset and determine device classes */
1371 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
1372 classes
[i
] = ATA_DEV_UNKNOWN
;
1374 if (ap
->ops
->probe_reset
) {
1375 rc
= ap
->ops
->probe_reset(ap
, classes
);
1377 printk("ata%u: reset failed (errno=%d)\n", ap
->id
, rc
);
1381 ap
->ops
->phy_reset(ap
);
1383 if (!(ap
->flags
& ATA_FLAG_PORT_DISABLED
))
1384 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
1385 classes
[i
] = ap
->device
[i
].class;
1390 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
1391 if (classes
[i
] == ATA_DEV_UNKNOWN
)
1392 classes
[i
] = ATA_DEV_NONE
;
1394 /* read IDENTIFY page and configure devices */
1395 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
1396 struct ata_device
*dev
= &ap
->device
[i
];
1398 dev
->class = classes
[i
];
1400 if (!ata_dev_present(dev
))
1403 WARN_ON(dev
->id
!= NULL
);
1404 if (ata_dev_read_id(ap
, dev
, &dev
->class, 1, &dev
->id
)) {
1405 dev
->class = ATA_DEV_NONE
;
1409 if (ata_dev_configure(ap
, dev
, 1)) {
1410 dev
->class++; /* disable device */
1418 goto err_out_disable
;
1421 if (ap
->flags
& ATA_FLAG_PORT_DISABLED
)
1422 goto err_out_disable
;
1427 ap
->ops
->port_disable(ap
);
1432 * ata_port_probe - Mark port as enabled
1433 * @ap: Port for which we indicate enablement
1435 * Modify @ap data structure such that the system
1436 * thinks that the entire port is enabled.
1438 * LOCKING: host_set lock, or some other form of
1442 void ata_port_probe(struct ata_port
*ap
)
1444 ap
->flags
&= ~ATA_FLAG_PORT_DISABLED
;
1448 * sata_print_link_status - Print SATA link status
1449 * @ap: SATA port to printk link status about
1451 * This function prints link speed and status of a SATA link.
1456 static void sata_print_link_status(struct ata_port
*ap
)
1461 if (!ap
->ops
->scr_read
)
1464 sstatus
= scr_read(ap
, SCR_STATUS
);
1466 if (sata_dev_present(ap
)) {
1467 tmp
= (sstatus
>> 4) & 0xf;
1470 else if (tmp
& (1 << 1))
1473 speed
= "<unknown>";
1474 printk(KERN_INFO
"ata%u: SATA link up %s Gbps (SStatus %X)\n",
1475 ap
->id
, speed
, sstatus
);
1477 printk(KERN_INFO
"ata%u: SATA link down (SStatus %X)\n",
1483 * __sata_phy_reset - Wake/reset a low-level SATA PHY
1484 * @ap: SATA port associated with target SATA PHY.
1486 * This function issues commands to standard SATA Sxxx
1487 * PHY registers, to wake up the phy (and device), and
1488 * clear any reset condition.
1491 * PCI/etc. bus probe sem.
1494 void __sata_phy_reset(struct ata_port
*ap
)
1497 unsigned long timeout
= jiffies
+ (HZ
* 5);
1499 if (ap
->flags
& ATA_FLAG_SATA_RESET
) {
1500 /* issue phy wake/reset */
1501 scr_write_flush(ap
, SCR_CONTROL
, 0x301);
1502 /* Couldn't find anything in SATA I/II specs, but
1503 * AHCI-1.1 10.4.2 says at least 1 ms. */
1506 scr_write_flush(ap
, SCR_CONTROL
, 0x300); /* phy wake/clear reset */
1508 /* wait for phy to become ready, if necessary */
1511 sstatus
= scr_read(ap
, SCR_STATUS
);
1512 if ((sstatus
& 0xf) != 1)
1514 } while (time_before(jiffies
, timeout
));
1516 /* print link status */
1517 sata_print_link_status(ap
);
1519 /* TODO: phy layer with polling, timeouts, etc. */
1520 if (sata_dev_present(ap
))
1523 ata_port_disable(ap
);
1525 if (ap
->flags
& ATA_FLAG_PORT_DISABLED
)
1528 if (ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
)) {
1529 ata_port_disable(ap
);
1533 ap
->cbl
= ATA_CBL_SATA
;
1537 * sata_phy_reset - Reset SATA bus.
1538 * @ap: SATA port associated with target SATA PHY.
1540 * This function resets the SATA bus, and then probes
1541 * the bus for devices.
1544 * PCI/etc. bus probe sem.
1547 void sata_phy_reset(struct ata_port
*ap
)
1549 __sata_phy_reset(ap
);
1550 if (ap
->flags
& ATA_FLAG_PORT_DISABLED
)
1556 * ata_port_disable - Disable port.
1557 * @ap: Port to be disabled.
1559 * Modify @ap data structure such that the system
1560 * thinks that the entire port is disabled, and should
1561 * never attempt to probe or communicate with devices
1564 * LOCKING: host_set lock, or some other form of
1568 void ata_port_disable(struct ata_port
*ap
)
1570 ap
->device
[0].class = ATA_DEV_NONE
;
1571 ap
->device
[1].class = ATA_DEV_NONE
;
1572 ap
->flags
|= ATA_FLAG_PORT_DISABLED
;
1576 * This mode timing computation functionality is ported over from
1577 * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik
1580 * PIO 0-5, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
1581 * These were taken from ATA/ATAPI-6 standard, rev 0a, except
1582 * for PIO 5, which is a nonstandard extension and UDMA6, which
1583 * is currently supported only by Maxtor drives.
1586 static const struct ata_timing ata_timing
[] = {
1588 { XFER_UDMA_6
, 0, 0, 0, 0, 0, 0, 0, 15 },
1589 { XFER_UDMA_5
, 0, 0, 0, 0, 0, 0, 0, 20 },
1590 { XFER_UDMA_4
, 0, 0, 0, 0, 0, 0, 0, 30 },
1591 { XFER_UDMA_3
, 0, 0, 0, 0, 0, 0, 0, 45 },
1593 { XFER_UDMA_2
, 0, 0, 0, 0, 0, 0, 0, 60 },
1594 { XFER_UDMA_1
, 0, 0, 0, 0, 0, 0, 0, 80 },
1595 { XFER_UDMA_0
, 0, 0, 0, 0, 0, 0, 0, 120 },
1597 /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */
1599 { XFER_MW_DMA_2
, 25, 0, 0, 0, 70, 25, 120, 0 },
1600 { XFER_MW_DMA_1
, 45, 0, 0, 0, 80, 50, 150, 0 },
1601 { XFER_MW_DMA_0
, 60, 0, 0, 0, 215, 215, 480, 0 },
1603 { XFER_SW_DMA_2
, 60, 0, 0, 0, 120, 120, 240, 0 },
1604 { XFER_SW_DMA_1
, 90, 0, 0, 0, 240, 240, 480, 0 },
1605 { XFER_SW_DMA_0
, 120, 0, 0, 0, 480, 480, 960, 0 },
1607 /* { XFER_PIO_5, 20, 50, 30, 100, 50, 30, 100, 0 }, */
1608 { XFER_PIO_4
, 25, 70, 25, 120, 70, 25, 120, 0 },
1609 { XFER_PIO_3
, 30, 80, 70, 180, 80, 70, 180, 0 },
1611 { XFER_PIO_2
, 30, 290, 40, 330, 100, 90, 240, 0 },
1612 { XFER_PIO_1
, 50, 290, 93, 383, 125, 100, 383, 0 },
1613 { XFER_PIO_0
, 70, 290, 240, 600, 165, 150, 600, 0 },
1615 /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */
1620 #define ENOUGH(v,unit) (((v)-1)/(unit)+1)
1621 #define EZ(v,unit) ((v)?ENOUGH(v,unit):0)
1623 static void ata_timing_quantize(const struct ata_timing
*t
, struct ata_timing
*q
, int T
, int UT
)
1625 q
->setup
= EZ(t
->setup
* 1000, T
);
1626 q
->act8b
= EZ(t
->act8b
* 1000, T
);
1627 q
->rec8b
= EZ(t
->rec8b
* 1000, T
);
1628 q
->cyc8b
= EZ(t
->cyc8b
* 1000, T
);
1629 q
->active
= EZ(t
->active
* 1000, T
);
1630 q
->recover
= EZ(t
->recover
* 1000, T
);
1631 q
->cycle
= EZ(t
->cycle
* 1000, T
);
1632 q
->udma
= EZ(t
->udma
* 1000, UT
);
1635 void ata_timing_merge(const struct ata_timing
*a
, const struct ata_timing
*b
,
1636 struct ata_timing
*m
, unsigned int what
)
1638 if (what
& ATA_TIMING_SETUP
) m
->setup
= max(a
->setup
, b
->setup
);
1639 if (what
& ATA_TIMING_ACT8B
) m
->act8b
= max(a
->act8b
, b
->act8b
);
1640 if (what
& ATA_TIMING_REC8B
) m
->rec8b
= max(a
->rec8b
, b
->rec8b
);
1641 if (what
& ATA_TIMING_CYC8B
) m
->cyc8b
= max(a
->cyc8b
, b
->cyc8b
);
1642 if (what
& ATA_TIMING_ACTIVE
) m
->active
= max(a
->active
, b
->active
);
1643 if (what
& ATA_TIMING_RECOVER
) m
->recover
= max(a
->recover
, b
->recover
);
1644 if (what
& ATA_TIMING_CYCLE
) m
->cycle
= max(a
->cycle
, b
->cycle
);
1645 if (what
& ATA_TIMING_UDMA
) m
->udma
= max(a
->udma
, b
->udma
);
1648 static const struct ata_timing
* ata_timing_find_mode(unsigned short speed
)
1650 const struct ata_timing
*t
;
1652 for (t
= ata_timing
; t
->mode
!= speed
; t
++)
1653 if (t
->mode
== 0xFF)
1658 int ata_timing_compute(struct ata_device
*adev
, unsigned short speed
,
1659 struct ata_timing
*t
, int T
, int UT
)
1661 const struct ata_timing
*s
;
1662 struct ata_timing p
;
1668 if (!(s
= ata_timing_find_mode(speed
)))
1671 memcpy(t
, s
, sizeof(*s
));
1674 * If the drive is an EIDE drive, it can tell us it needs extended
1675 * PIO/MW_DMA cycle timing.
1678 if (adev
->id
[ATA_ID_FIELD_VALID
] & 2) { /* EIDE drive */
1679 memset(&p
, 0, sizeof(p
));
1680 if(speed
>= XFER_PIO_0
&& speed
<= XFER_SW_DMA_0
) {
1681 if (speed
<= XFER_PIO_2
) p
.cycle
= p
.cyc8b
= adev
->id
[ATA_ID_EIDE_PIO
];
1682 else p
.cycle
= p
.cyc8b
= adev
->id
[ATA_ID_EIDE_PIO_IORDY
];
1683 } else if(speed
>= XFER_MW_DMA_0
&& speed
<= XFER_MW_DMA_2
) {
1684 p
.cycle
= adev
->id
[ATA_ID_EIDE_DMA_MIN
];
1686 ata_timing_merge(&p
, t
, t
, ATA_TIMING_CYCLE
| ATA_TIMING_CYC8B
);
1690 * Convert the timing to bus clock counts.
1693 ata_timing_quantize(t
, t
, T
, UT
);
1696 * Even in DMA/UDMA modes we still use PIO access for IDENTIFY,
1697 * S.M.A.R.T * and some other commands. We have to ensure that the
1698 * DMA cycle timing is slower/equal than the fastest PIO timing.
1701 if (speed
> XFER_PIO_4
) {
1702 ata_timing_compute(adev
, adev
->pio_mode
, &p
, T
, UT
);
1703 ata_timing_merge(&p
, t
, t
, ATA_TIMING_ALL
);
1707 * Lengthen active & recovery time so that cycle time is correct.
1710 if (t
->act8b
+ t
->rec8b
< t
->cyc8b
) {
1711 t
->act8b
+= (t
->cyc8b
- (t
->act8b
+ t
->rec8b
)) / 2;
1712 t
->rec8b
= t
->cyc8b
- t
->act8b
;
1715 if (t
->active
+ t
->recover
< t
->cycle
) {
1716 t
->active
+= (t
->cycle
- (t
->active
+ t
->recover
)) / 2;
1717 t
->recover
= t
->cycle
- t
->active
;
1723 static void ata_dev_set_mode(struct ata_port
*ap
, struct ata_device
*dev
)
1725 if (!ata_dev_present(dev
) || (ap
->flags
& ATA_FLAG_PORT_DISABLED
))
1728 if (dev
->xfer_shift
== ATA_SHIFT_PIO
)
1729 dev
->flags
|= ATA_DFLAG_PIO
;
1731 ata_dev_set_xfermode(ap
, dev
);
1733 if (ata_dev_revalidate(ap
, dev
, 0)) {
1734 printk(KERN_ERR
"ata%u: failed to revalidate after set "
1735 "xfermode, disabled\n", ap
->id
);
1736 ata_port_disable(ap
);
1739 DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
1740 dev
->xfer_shift
, (int)dev
->xfer_mode
);
1742 printk(KERN_INFO
"ata%u: dev %u configured for %s\n",
1744 ata_mode_string(ata_xfer_mode2mask(dev
->xfer_mode
)));
1747 static int ata_host_set_pio(struct ata_port
*ap
)
1751 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
1752 struct ata_device
*dev
= &ap
->device
[i
];
1754 if (!ata_dev_present(dev
))
1757 if (!dev
->pio_mode
) {
1758 printk(KERN_WARNING
"ata%u: no PIO support for device %d.\n", ap
->id
, i
);
1762 dev
->xfer_mode
= dev
->pio_mode
;
1763 dev
->xfer_shift
= ATA_SHIFT_PIO
;
1764 if (ap
->ops
->set_piomode
)
1765 ap
->ops
->set_piomode(ap
, dev
);
1771 static void ata_host_set_dma(struct ata_port
*ap
)
1775 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
1776 struct ata_device
*dev
= &ap
->device
[i
];
1778 if (!ata_dev_present(dev
) || !dev
->dma_mode
)
1781 dev
->xfer_mode
= dev
->dma_mode
;
1782 dev
->xfer_shift
= ata_xfer_mode2shift(dev
->dma_mode
);
1783 if (ap
->ops
->set_dmamode
)
1784 ap
->ops
->set_dmamode(ap
, dev
);
1789 * ata_set_mode - Program timings and issue SET FEATURES - XFER
1790 * @ap: port on which timings will be programmed
1792 * Set ATA device disk transfer mode (PIO3, UDMA6, etc.).
1795 * PCI/etc. bus probe sem.
1797 static void ata_set_mode(struct ata_port
*ap
)
1801 /* step 1: calculate xfer_mask */
1802 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
1803 struct ata_device
*dev
= &ap
->device
[i
];
1804 unsigned int xfer_mask
;
1806 if (!ata_dev_present(dev
))
1809 xfer_mask
= ata_dev_xfermask(ap
, dev
);
1811 dev
->pio_mode
= ata_xfer_mask2mode(xfer_mask
& ATA_MASK_PIO
);
1812 dev
->dma_mode
= ata_xfer_mask2mode(xfer_mask
& (ATA_MASK_MWDMA
|
1816 /* step 2: always set host PIO timings */
1817 rc
= ata_host_set_pio(ap
);
1821 /* step 3: set host DMA timings */
1822 ata_host_set_dma(ap
);
1824 /* step 4: update devices' xfer mode */
1825 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
1826 ata_dev_set_mode(ap
, &ap
->device
[i
]);
1828 if (ap
->flags
& ATA_FLAG_PORT_DISABLED
)
1831 if (ap
->ops
->post_set_mode
)
1832 ap
->ops
->post_set_mode(ap
);
1837 ata_port_disable(ap
);
1841 * ata_tf_to_host - issue ATA taskfile to host controller
1842 * @ap: port to which command is being issued
1843 * @tf: ATA taskfile register set
1845 * Issues ATA taskfile register set to ATA host controller,
1846 * with proper synchronization with interrupt handler and
1850 * spin_lock_irqsave(host_set lock)
1853 static inline void ata_tf_to_host(struct ata_port
*ap
,
1854 const struct ata_taskfile
*tf
)
1856 ap
->ops
->tf_load(ap
, tf
);
1857 ap
->ops
->exec_command(ap
, tf
);
1861 * ata_busy_sleep - sleep until BSY clears, or timeout
1862 * @ap: port containing status register to be polled
1863 * @tmout_pat: impatience timeout
1864 * @tmout: overall timeout
1866 * Sleep until ATA Status register bit BSY clears,
1867 * or a timeout occurs.
1872 unsigned int ata_busy_sleep (struct ata_port
*ap
,
1873 unsigned long tmout_pat
, unsigned long tmout
)
1875 unsigned long timer_start
, timeout
;
1878 status
= ata_busy_wait(ap
, ATA_BUSY
, 300);
1879 timer_start
= jiffies
;
1880 timeout
= timer_start
+ tmout_pat
;
1881 while ((status
& ATA_BUSY
) && (time_before(jiffies
, timeout
))) {
1883 status
= ata_busy_wait(ap
, ATA_BUSY
, 3);
1886 if (status
& ATA_BUSY
)
1887 printk(KERN_WARNING
"ata%u is slow to respond, "
1888 "please be patient\n", ap
->id
);
1890 timeout
= timer_start
+ tmout
;
1891 while ((status
& ATA_BUSY
) && (time_before(jiffies
, timeout
))) {
1893 status
= ata_chk_status(ap
);
1896 if (status
& ATA_BUSY
) {
1897 printk(KERN_ERR
"ata%u failed to respond (%lu secs)\n",
1898 ap
->id
, tmout
/ HZ
);
1905 static void ata_bus_post_reset(struct ata_port
*ap
, unsigned int devmask
)
1907 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
1908 unsigned int dev0
= devmask
& (1 << 0);
1909 unsigned int dev1
= devmask
& (1 << 1);
1910 unsigned long timeout
;
1912 /* if device 0 was found in ata_devchk, wait for its
1916 ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
);
1918 /* if device 1 was found in ata_devchk, wait for
1919 * register access, then wait for BSY to clear
1921 timeout
= jiffies
+ ATA_TMOUT_BOOT
;
1925 ap
->ops
->dev_select(ap
, 1);
1926 if (ap
->flags
& ATA_FLAG_MMIO
) {
1927 nsect
= readb((void __iomem
*) ioaddr
->nsect_addr
);
1928 lbal
= readb((void __iomem
*) ioaddr
->lbal_addr
);
1930 nsect
= inb(ioaddr
->nsect_addr
);
1931 lbal
= inb(ioaddr
->lbal_addr
);
1933 if ((nsect
== 1) && (lbal
== 1))
1935 if (time_after(jiffies
, timeout
)) {
1939 msleep(50); /* give drive a breather */
1942 ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
);
1944 /* is all this really necessary? */
1945 ap
->ops
->dev_select(ap
, 0);
1947 ap
->ops
->dev_select(ap
, 1);
1949 ap
->ops
->dev_select(ap
, 0);
1953 * ata_bus_edd - Issue EXECUTE DEVICE DIAGNOSTIC command.
1954 * @ap: Port to reset and probe
1956 * Use the EXECUTE DEVICE DIAGNOSTIC command to reset and
1957 * probe the bus. Not often used these days.
1960 * PCI/etc. bus probe sem.
1961 * Obtains host_set lock.
1965 static unsigned int ata_bus_edd(struct ata_port
*ap
)
1967 struct ata_taskfile tf
;
1968 unsigned long flags
;
1970 /* set up execute-device-diag (bus reset) taskfile */
1971 /* also, take interrupts to a known state (disabled) */
1972 DPRINTK("execute-device-diag\n");
1973 ata_tf_init(ap
, &tf
, 0);
1975 tf
.command
= ATA_CMD_EDD
;
1976 tf
.protocol
= ATA_PROT_NODATA
;
1979 spin_lock_irqsave(&ap
->host_set
->lock
, flags
);
1980 ata_tf_to_host(ap
, &tf
);
1981 spin_unlock_irqrestore(&ap
->host_set
->lock
, flags
);
1983 /* spec says at least 2ms. but who knows with those
1984 * crazy ATAPI devices...
1988 return ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
);
1991 static unsigned int ata_bus_softreset(struct ata_port
*ap
,
1992 unsigned int devmask
)
1994 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
1996 DPRINTK("ata%u: bus reset via SRST\n", ap
->id
);
1998 /* software reset. causes dev0 to be selected */
1999 if (ap
->flags
& ATA_FLAG_MMIO
) {
2000 writeb(ap
->ctl
, (void __iomem
*) ioaddr
->ctl_addr
);
2001 udelay(20); /* FIXME: flush */
2002 writeb(ap
->ctl
| ATA_SRST
, (void __iomem
*) ioaddr
->ctl_addr
);
2003 udelay(20); /* FIXME: flush */
2004 writeb(ap
->ctl
, (void __iomem
*) ioaddr
->ctl_addr
);
2006 outb(ap
->ctl
, ioaddr
->ctl_addr
);
2008 outb(ap
->ctl
| ATA_SRST
, ioaddr
->ctl_addr
);
2010 outb(ap
->ctl
, ioaddr
->ctl_addr
);
2013 /* spec mandates ">= 2ms" before checking status.
2014 * We wait 150ms, because that was the magic delay used for
2015 * ATAPI devices in Hale Landis's ATADRVR, for the period of time
2016 * between when the ATA command register is written, and then
2017 * status is checked. Because waiting for "a while" before
2018 * checking status is fine, post SRST, we perform this magic
2019 * delay here as well.
2021 * Old drivers/ide uses the 2mS rule and then waits for ready
2026 /* Before we perform post reset processing we want to see if
2027 the bus shows 0xFF because the odd clown forgets the D7 pulldown
2030 if (ata_check_status(ap
) == 0xFF)
2031 return 1; /* Positive is failure for some reason */
2033 ata_bus_post_reset(ap
, devmask
);
2039 * ata_bus_reset - reset host port and associated ATA channel
2040 * @ap: port to reset
2042 * This is typically the first time we actually start issuing
2043 * commands to the ATA channel. We wait for BSY to clear, then
2044 * issue EXECUTE DEVICE DIAGNOSTIC command, polling for its
2045 * result. Determine what devices, if any, are on the channel
2046 * by looking at the device 0/1 error register. Look at the signature
2047 * stored in each device's taskfile registers, to determine if
2048 * the device is ATA or ATAPI.
2051 * PCI/etc. bus probe sem.
2052 * Obtains host_set lock.
2055 * Sets ATA_FLAG_PORT_DISABLED if bus reset fails.
2058 void ata_bus_reset(struct ata_port
*ap
)
2060 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
2061 unsigned int slave_possible
= ap
->flags
& ATA_FLAG_SLAVE_POSS
;
2063 unsigned int dev0
, dev1
= 0, rc
= 0, devmask
= 0;
2065 DPRINTK("ENTER, host %u, port %u\n", ap
->id
, ap
->port_no
);
2067 /* determine if device 0/1 are present */
2068 if (ap
->flags
& ATA_FLAG_SATA_RESET
)
2071 dev0
= ata_devchk(ap
, 0);
2073 dev1
= ata_devchk(ap
, 1);
2077 devmask
|= (1 << 0);
2079 devmask
|= (1 << 1);
2081 /* select device 0 again */
2082 ap
->ops
->dev_select(ap
, 0);
2084 /* issue bus reset */
2085 if (ap
->flags
& ATA_FLAG_SRST
)
2086 rc
= ata_bus_softreset(ap
, devmask
);
2087 else if ((ap
->flags
& ATA_FLAG_SATA_RESET
) == 0) {
2088 /* set up device control */
2089 if (ap
->flags
& ATA_FLAG_MMIO
)
2090 writeb(ap
->ctl
, (void __iomem
*) ioaddr
->ctl_addr
);
2092 outb(ap
->ctl
, ioaddr
->ctl_addr
);
2093 rc
= ata_bus_edd(ap
);
2100 * determine by signature whether we have ATA or ATAPI devices
2102 ap
->device
[0].class = ata_dev_try_classify(ap
, 0, &err
);
2103 if ((slave_possible
) && (err
!= 0x81))
2104 ap
->device
[1].class = ata_dev_try_classify(ap
, 1, &err
);
2106 /* re-enable interrupts */
2107 if (ap
->ioaddr
.ctl_addr
) /* FIXME: hack. create a hook instead */
2110 /* is double-select really necessary? */
2111 if (ap
->device
[1].class != ATA_DEV_NONE
)
2112 ap
->ops
->dev_select(ap
, 1);
2113 if (ap
->device
[0].class != ATA_DEV_NONE
)
2114 ap
->ops
->dev_select(ap
, 0);
2116 /* if no devices were detected, disable this port */
2117 if ((ap
->device
[0].class == ATA_DEV_NONE
) &&
2118 (ap
->device
[1].class == ATA_DEV_NONE
))
2121 if (ap
->flags
& (ATA_FLAG_SATA_RESET
| ATA_FLAG_SRST
)) {
2122 /* set up device control for ATA_FLAG_SATA_RESET */
2123 if (ap
->flags
& ATA_FLAG_MMIO
)
2124 writeb(ap
->ctl
, (void __iomem
*) ioaddr
->ctl_addr
);
2126 outb(ap
->ctl
, ioaddr
->ctl_addr
);
2133 printk(KERN_ERR
"ata%u: disabling port\n", ap
->id
);
2134 ap
->ops
->port_disable(ap
);
2139 static int sata_phy_resume(struct ata_port
*ap
)
2141 unsigned long timeout
= jiffies
+ (HZ
* 5);
2144 scr_write_flush(ap
, SCR_CONTROL
, 0x300);
2146 /* Wait for phy to become ready, if necessary. */
2149 sstatus
= scr_read(ap
, SCR_STATUS
);
2150 if ((sstatus
& 0xf) != 1)
2152 } while (time_before(jiffies
, timeout
));
2158 * ata_std_probeinit - initialize probing
2159 * @ap: port to be probed
2161 * @ap is about to be probed. Initialize it. This function is
2162 * to be used as standard callback for ata_drive_probe_reset().
2164 * NOTE!!! Do not use this function as probeinit if a low level
2165 * driver implements only hardreset. Just pass NULL as probeinit
2166 * in that case. Using this function is probably okay but doing
2167 * so makes reset sequence different from the original
2168 * ->phy_reset implementation and Jeff nervous. :-P
2170 extern void ata_std_probeinit(struct ata_port
*ap
)
2172 if (ap
->flags
& ATA_FLAG_SATA
&& ap
->ops
->scr_read
) {
2173 sata_phy_resume(ap
);
2174 if (sata_dev_present(ap
))
2175 ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
);
2180 * ata_std_softreset - reset host port via ATA SRST
2181 * @ap: port to reset
2182 * @verbose: fail verbosely
2183 * @classes: resulting classes of attached devices
2185 * Reset host port using ATA SRST. This function is to be used
2186 * as standard callback for ata_drive_*_reset() functions.
2189 * Kernel thread context (may sleep)
2192 * 0 on success, -errno otherwise.
2194 int ata_std_softreset(struct ata_port
*ap
, int verbose
, unsigned int *classes
)
2196 unsigned int slave_possible
= ap
->flags
& ATA_FLAG_SLAVE_POSS
;
2197 unsigned int devmask
= 0, err_mask
;
2202 if (ap
->ops
->scr_read
&& !sata_dev_present(ap
)) {
2203 classes
[0] = ATA_DEV_NONE
;
2207 /* determine if device 0/1 are present */
2208 if (ata_devchk(ap
, 0))
2209 devmask
|= (1 << 0);
2210 if (slave_possible
&& ata_devchk(ap
, 1))
2211 devmask
|= (1 << 1);
2213 /* select device 0 again */
2214 ap
->ops
->dev_select(ap
, 0);
2216 /* issue bus reset */
2217 DPRINTK("about to softreset, devmask=%x\n", devmask
);
2218 err_mask
= ata_bus_softreset(ap
, devmask
);
2221 printk(KERN_ERR
"ata%u: SRST failed (err_mask=0x%x)\n",
2224 DPRINTK("EXIT, softreset failed (err_mask=0x%x)\n",
2229 /* determine by signature whether we have ATA or ATAPI devices */
2230 classes
[0] = ata_dev_try_classify(ap
, 0, &err
);
2231 if (slave_possible
&& err
!= 0x81)
2232 classes
[1] = ata_dev_try_classify(ap
, 1, &err
);
2235 DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes
[0], classes
[1]);
2240 * sata_std_hardreset - reset host port via SATA phy reset
2241 * @ap: port to reset
2242 * @verbose: fail verbosely
2243 * @class: resulting class of attached device
2245 * SATA phy-reset host port using DET bits of SControl register.
2246 * This function is to be used as standard callback for
2247 * ata_drive_*_reset().
2250 * Kernel thread context (may sleep)
2253 * 0 on success, -errno otherwise.
2255 int sata_std_hardreset(struct ata_port
*ap
, int verbose
, unsigned int *class)
2259 /* Issue phy wake/reset */
2260 scr_write_flush(ap
, SCR_CONTROL
, 0x301);
2263 * Couldn't find anything in SATA I/II specs, but AHCI-1.1
2264 * 10.4.2 says at least 1 ms.
2268 /* Bring phy back */
2269 sata_phy_resume(ap
);
2271 /* TODO: phy layer with polling, timeouts, etc. */
2272 if (!sata_dev_present(ap
)) {
2273 *class = ATA_DEV_NONE
;
2274 DPRINTK("EXIT, link offline\n");
2278 if (ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
)) {
2280 printk(KERN_ERR
"ata%u: COMRESET failed "
2281 "(device not ready)\n", ap
->id
);
2283 DPRINTK("EXIT, device not ready\n");
2287 ap
->ops
->dev_select(ap
, 0); /* probably unnecessary */
2289 *class = ata_dev_try_classify(ap
, 0, NULL
);
2291 DPRINTK("EXIT, class=%u\n", *class);
2296 * ata_std_postreset - standard postreset callback
2297 * @ap: the target ata_port
2298 * @classes: classes of attached devices
2300 * This function is invoked after a successful reset. Note that
2301 * the device might have been reset more than once using
2302 * different reset methods before postreset is invoked.
2304 * This function is to be used as standard callback for
2305 * ata_drive_*_reset().
2308 * Kernel thread context (may sleep)
2310 void ata_std_postreset(struct ata_port
*ap
, unsigned int *classes
)
2314 /* set cable type if it isn't already set */
2315 if (ap
->cbl
== ATA_CBL_NONE
&& ap
->flags
& ATA_FLAG_SATA
)
2316 ap
->cbl
= ATA_CBL_SATA
;
2318 /* print link status */
2319 if (ap
->cbl
== ATA_CBL_SATA
)
2320 sata_print_link_status(ap
);
2322 /* re-enable interrupts */
2323 if (ap
->ioaddr
.ctl_addr
) /* FIXME: hack. create a hook instead */
2326 /* is double-select really necessary? */
2327 if (classes
[0] != ATA_DEV_NONE
)
2328 ap
->ops
->dev_select(ap
, 1);
2329 if (classes
[1] != ATA_DEV_NONE
)
2330 ap
->ops
->dev_select(ap
, 0);
2332 /* bail out if no device is present */
2333 if (classes
[0] == ATA_DEV_NONE
&& classes
[1] == ATA_DEV_NONE
) {
2334 DPRINTK("EXIT, no device\n");
2338 /* set up device control */
2339 if (ap
->ioaddr
.ctl_addr
) {
2340 if (ap
->flags
& ATA_FLAG_MMIO
)
2341 writeb(ap
->ctl
, (void __iomem
*) ap
->ioaddr
.ctl_addr
);
2343 outb(ap
->ctl
, ap
->ioaddr
.ctl_addr
);
2350 * ata_std_probe_reset - standard probe reset method
2351 * @ap: prot to perform probe-reset
2352 * @classes: resulting classes of attached devices
2354 * The stock off-the-shelf ->probe_reset method.
2357 * Kernel thread context (may sleep)
2360 * 0 on success, -errno otherwise.
2362 int ata_std_probe_reset(struct ata_port
*ap
, unsigned int *classes
)
2364 ata_reset_fn_t hardreset
;
2367 if (ap
->flags
& ATA_FLAG_SATA
&& ap
->ops
->scr_read
)
2368 hardreset
= sata_std_hardreset
;
2370 return ata_drive_probe_reset(ap
, ata_std_probeinit
,
2371 ata_std_softreset
, hardreset
,
2372 ata_std_postreset
, classes
);
2375 static int do_probe_reset(struct ata_port
*ap
, ata_reset_fn_t reset
,
2376 ata_postreset_fn_t postreset
,
2377 unsigned int *classes
)
2381 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
2382 classes
[i
] = ATA_DEV_UNKNOWN
;
2384 rc
= reset(ap
, 0, classes
);
2388 /* If any class isn't ATA_DEV_UNKNOWN, consider classification
2389 * is complete and convert all ATA_DEV_UNKNOWN to
2392 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
2393 if (classes
[i
] != ATA_DEV_UNKNOWN
)
2396 if (i
< ATA_MAX_DEVICES
)
2397 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
2398 if (classes
[i
] == ATA_DEV_UNKNOWN
)
2399 classes
[i
] = ATA_DEV_NONE
;
2402 postreset(ap
, classes
);
2404 return classes
[0] != ATA_DEV_UNKNOWN
? 0 : -ENODEV
;
2408 * ata_drive_probe_reset - Perform probe reset with given methods
2409 * @ap: port to reset
2410 * @probeinit: probeinit method (can be NULL)
2411 * @softreset: softreset method (can be NULL)
2412 * @hardreset: hardreset method (can be NULL)
2413 * @postreset: postreset method (can be NULL)
2414 * @classes: resulting classes of attached devices
2416 * Reset the specified port and classify attached devices using
2417 * given methods. This function prefers softreset but tries all
2418 * possible reset sequences to reset and classify devices. This
2419 * function is intended to be used for constructing ->probe_reset
2420 * callback by low level drivers.
2422 * Reset methods should follow the following rules.
2424 * - Return 0 on sucess, -errno on failure.
2425 * - If classification is supported, fill classes[] with
2426 * recognized class codes.
2427 * - If classification is not supported, leave classes[] alone.
2428 * - If verbose is non-zero, print error message on failure;
2429 * otherwise, shut up.
2432 * Kernel thread context (may sleep)
2435 * 0 on success, -EINVAL if no reset method is avaliable, -ENODEV
2436 * if classification fails, and any error code from reset
2439 int ata_drive_probe_reset(struct ata_port
*ap
, ata_probeinit_fn_t probeinit
,
2440 ata_reset_fn_t softreset
, ata_reset_fn_t hardreset
,
2441 ata_postreset_fn_t postreset
, unsigned int *classes
)
2449 rc
= do_probe_reset(ap
, softreset
, postreset
, classes
);
2457 rc
= do_probe_reset(ap
, hardreset
, postreset
, classes
);
2458 if (rc
== 0 || rc
!= -ENODEV
)
2462 rc
= do_probe_reset(ap
, softreset
, postreset
, classes
);
2468 * ata_dev_same_device - Determine whether new ID matches configured device
2469 * @ap: port on which the device to compare against resides
2470 * @dev: device to compare against
2471 * @new_class: class of the new device
2472 * @new_id: IDENTIFY page of the new device
2474 * Compare @new_class and @new_id against @dev and determine
2475 * whether @dev is the device indicated by @new_class and
2482 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
2484 static int ata_dev_same_device(struct ata_port
*ap
, struct ata_device
*dev
,
2485 unsigned int new_class
, const u16
*new_id
)
2487 const u16
*old_id
= dev
->id
;
2488 unsigned char model
[2][41], serial
[2][21];
2491 if (dev
->class != new_class
) {
2493 "ata%u: dev %u class mismatch %d != %d\n",
2494 ap
->id
, dev
->devno
, dev
->class, new_class
);
2498 ata_id_c_string(old_id
, model
[0], ATA_ID_PROD_OFS
, sizeof(model
[0]));
2499 ata_id_c_string(new_id
, model
[1], ATA_ID_PROD_OFS
, sizeof(model
[1]));
2500 ata_id_c_string(old_id
, serial
[0], ATA_ID_SERNO_OFS
, sizeof(serial
[0]));
2501 ata_id_c_string(new_id
, serial
[1], ATA_ID_SERNO_OFS
, sizeof(serial
[1]));
2502 new_n_sectors
= ata_id_n_sectors(new_id
);
2504 if (strcmp(model
[0], model
[1])) {
2506 "ata%u: dev %u model number mismatch '%s' != '%s'\n",
2507 ap
->id
, dev
->devno
, model
[0], model
[1]);
2511 if (strcmp(serial
[0], serial
[1])) {
2513 "ata%u: dev %u serial number mismatch '%s' != '%s'\n",
2514 ap
->id
, dev
->devno
, serial
[0], serial
[1]);
2518 if (dev
->class == ATA_DEV_ATA
&& dev
->n_sectors
!= new_n_sectors
) {
2520 "ata%u: dev %u n_sectors mismatch %llu != %llu\n",
2521 ap
->id
, dev
->devno
, (unsigned long long)dev
->n_sectors
,
2522 (unsigned long long)new_n_sectors
);
2530 * ata_dev_revalidate - Revalidate ATA device
2531 * @ap: port on which the device to revalidate resides
2532 * @dev: device to revalidate
2533 * @post_reset: is this revalidation after reset?
2535 * Re-read IDENTIFY page and make sure @dev is still attached to
2539 * Kernel thread context (may sleep)
2542 * 0 on success, negative errno otherwise
2544 int ata_dev_revalidate(struct ata_port
*ap
, struct ata_device
*dev
,
2551 if (!ata_dev_present(dev
))
2557 /* allocate & read ID data */
2558 rc
= ata_dev_read_id(ap
, dev
, &class, post_reset
, &id
);
2562 /* is the device still there? */
2563 if (!ata_dev_same_device(ap
, dev
, class, id
)) {
2571 /* configure device according to the new ID */
2572 return ata_dev_configure(ap
, dev
, 0);
2575 printk(KERN_ERR
"ata%u: dev %u revalidation failed (errno=%d)\n",
2576 ap
->id
, dev
->devno
, rc
);
2581 static const char * const ata_dma_blacklist
[] = {
2582 "WDC AC11000H", NULL
,
2583 "WDC AC22100H", NULL
,
2584 "WDC AC32500H", NULL
,
2585 "WDC AC33100H", NULL
,
2586 "WDC AC31600H", NULL
,
2587 "WDC AC32100H", "24.09P07",
2588 "WDC AC23200L", "21.10N21",
2589 "Compaq CRD-8241B", NULL
,
2594 "SanDisk SDP3B", NULL
,
2595 "SanDisk SDP3B-64", NULL
,
2596 "SANYO CD-ROM CRD", NULL
,
2597 "HITACHI CDR-8", NULL
,
2598 "HITACHI CDR-8335", NULL
,
2599 "HITACHI CDR-8435", NULL
,
2600 "Toshiba CD-ROM XM-6202B", NULL
,
2601 "TOSHIBA CD-ROM XM-1702BC", NULL
,
2603 "E-IDE CD-ROM CR-840", NULL
,
2604 "CD-ROM Drive/F5A", NULL
,
2605 "WPI CDD-820", NULL
,
2606 "SAMSUNG CD-ROM SC-148C", NULL
,
2607 "SAMSUNG CD-ROM SC", NULL
,
2608 "SanDisk SDP3B-64", NULL
,
2609 "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL
,
2610 "_NEC DV5800A", NULL
,
2611 "SAMSUNG CD-ROM SN-124", "N001"
2614 static int ata_strim(char *s
, size_t len
)
2616 len
= strnlen(s
, len
);
2618 /* ATAPI specifies that empty space is blank-filled; remove blanks */
2619 while ((len
> 0) && (s
[len
- 1] == ' ')) {
2626 static int ata_dma_blacklisted(const struct ata_device
*dev
)
2628 unsigned char model_num
[40];
2629 unsigned char model_rev
[16];
2630 unsigned int nlen
, rlen
;
2633 ata_id_string(dev
->id
, model_num
, ATA_ID_PROD_OFS
,
2635 ata_id_string(dev
->id
, model_rev
, ATA_ID_FW_REV_OFS
,
2637 nlen
= ata_strim(model_num
, sizeof(model_num
));
2638 rlen
= ata_strim(model_rev
, sizeof(model_rev
));
2640 for (i
= 0; i
< ARRAY_SIZE(ata_dma_blacklist
); i
+= 2) {
2641 if (!strncmp(ata_dma_blacklist
[i
], model_num
, nlen
)) {
2642 if (ata_dma_blacklist
[i
+1] == NULL
)
2644 if (!strncmp(ata_dma_blacklist
[i
], model_rev
, rlen
))
2652 * ata_dev_xfermask - Compute supported xfermask of the given device
2653 * @ap: Port on which the device to compute xfermask for resides
2654 * @dev: Device to compute xfermask for
2656 * Compute supported xfermask of @dev. This function is
2657 * responsible for applying all known limits including host
2658 * controller limits, device blacklist, etc...
2664 * Computed xfermask.
2666 static unsigned int ata_dev_xfermask(struct ata_port
*ap
,
2667 struct ata_device
*dev
)
2669 unsigned long xfer_mask
;
2672 xfer_mask
= ata_pack_xfermask(ap
->pio_mask
, ap
->mwdma_mask
,
2675 /* use port-wide xfermask for now */
2676 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
2677 struct ata_device
*d
= &ap
->device
[i
];
2678 if (!ata_dev_present(d
))
2680 xfer_mask
&= ata_id_xfermask(d
->id
);
2681 if (ata_dma_blacklisted(d
))
2682 xfer_mask
&= ~(ATA_MASK_MWDMA
| ATA_MASK_UDMA
);
2685 if (ata_dma_blacklisted(dev
))
2686 printk(KERN_WARNING
"ata%u: dev %u is on DMA blacklist, "
2687 "disabling DMA\n", ap
->id
, dev
->devno
);
2693 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
2694 * @ap: Port associated with device @dev
2695 * @dev: Device to which command will be sent
2697 * Issue SET FEATURES - XFER MODE command to device @dev
2701 * PCI/etc. bus probe sem.
2704 static void ata_dev_set_xfermode(struct ata_port
*ap
, struct ata_device
*dev
)
2706 struct ata_taskfile tf
;
2708 /* set up set-features taskfile */
2709 DPRINTK("set features - xfer mode\n");
2711 ata_tf_init(ap
, &tf
, dev
->devno
);
2712 tf
.command
= ATA_CMD_SET_FEATURES
;
2713 tf
.feature
= SETFEATURES_XFER
;
2714 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
2715 tf
.protocol
= ATA_PROT_NODATA
;
2716 tf
.nsect
= dev
->xfer_mode
;
2718 if (ata_exec_internal(ap
, dev
, &tf
, DMA_NONE
, NULL
, 0)) {
2719 printk(KERN_ERR
"ata%u: failed to set xfermode, disabled\n",
2721 ata_port_disable(ap
);
2728 * ata_dev_init_params - Issue INIT DEV PARAMS command
2729 * @ap: Port associated with device @dev
2730 * @dev: Device to which command will be sent
2733 * Kernel thread context (may sleep)
2736 * 0 on success, AC_ERR_* mask otherwise.
2739 static unsigned int ata_dev_init_params(struct ata_port
*ap
,
2740 struct ata_device
*dev
)
2742 struct ata_taskfile tf
;
2743 unsigned int err_mask
;
2744 u16 sectors
= dev
->id
[6];
2745 u16 heads
= dev
->id
[3];
2747 /* Number of sectors per track 1-255. Number of heads 1-16 */
2748 if (sectors
< 1 || sectors
> 255 || heads
< 1 || heads
> 16)
2751 /* set up init dev params taskfile */
2752 DPRINTK("init dev params \n");
2754 ata_tf_init(ap
, &tf
, dev
->devno
);
2755 tf
.command
= ATA_CMD_INIT_DEV_PARAMS
;
2756 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
2757 tf
.protocol
= ATA_PROT_NODATA
;
2759 tf
.device
|= (heads
- 1) & 0x0f; /* max head = num. of heads - 1 */
2761 err_mask
= ata_exec_internal(ap
, dev
, &tf
, DMA_NONE
, NULL
, 0);
2763 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
2768 * ata_sg_clean - Unmap DMA memory associated with command
2769 * @qc: Command containing DMA memory to be released
2771 * Unmap all mapped DMA memory associated with this command.
2774 * spin_lock_irqsave(host_set lock)
2777 static void ata_sg_clean(struct ata_queued_cmd
*qc
)
2779 struct ata_port
*ap
= qc
->ap
;
2780 struct scatterlist
*sg
= qc
->__sg
;
2781 int dir
= qc
->dma_dir
;
2782 void *pad_buf
= NULL
;
2784 WARN_ON(!(qc
->flags
& ATA_QCFLAG_DMAMAP
));
2785 WARN_ON(sg
== NULL
);
2787 if (qc
->flags
& ATA_QCFLAG_SINGLE
)
2788 WARN_ON(qc
->n_elem
> 1);
2790 VPRINTK("unmapping %u sg elements\n", qc
->n_elem
);
2792 /* if we padded the buffer out to 32-bit bound, and data
2793 * xfer direction is from-device, we must copy from the
2794 * pad buffer back into the supplied buffer
2796 if (qc
->pad_len
&& !(qc
->tf
.flags
& ATA_TFLAG_WRITE
))
2797 pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
2799 if (qc
->flags
& ATA_QCFLAG_SG
) {
2801 dma_unmap_sg(ap
->host_set
->dev
, sg
, qc
->n_elem
, dir
);
2802 /* restore last sg */
2803 sg
[qc
->orig_n_elem
- 1].length
+= qc
->pad_len
;
2805 struct scatterlist
*psg
= &qc
->pad_sgent
;
2806 void *addr
= kmap_atomic(psg
->page
, KM_IRQ0
);
2807 memcpy(addr
+ psg
->offset
, pad_buf
, qc
->pad_len
);
2808 kunmap_atomic(addr
, KM_IRQ0
);
2812 dma_unmap_single(ap
->host_set
->dev
,
2813 sg_dma_address(&sg
[0]), sg_dma_len(&sg
[0]),
2816 sg
->length
+= qc
->pad_len
;
2818 memcpy(qc
->buf_virt
+ sg
->length
- qc
->pad_len
,
2819 pad_buf
, qc
->pad_len
);
2822 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
2827 * ata_fill_sg - Fill PCI IDE PRD table
2828 * @qc: Metadata associated with taskfile to be transferred
2830 * Fill PCI IDE PRD (scatter-gather) table with segments
2831 * associated with the current disk command.
2834 * spin_lock_irqsave(host_set lock)
2837 static void ata_fill_sg(struct ata_queued_cmd
*qc
)
2839 struct ata_port
*ap
= qc
->ap
;
2840 struct scatterlist
*sg
;
2843 WARN_ON(qc
->__sg
== NULL
);
2844 WARN_ON(qc
->n_elem
== 0 && qc
->pad_len
== 0);
2847 ata_for_each_sg(sg
, qc
) {
2851 /* determine if physical DMA addr spans 64K boundary.
2852 * Note h/w doesn't support 64-bit, so we unconditionally
2853 * truncate dma_addr_t to u32.
2855 addr
= (u32
) sg_dma_address(sg
);
2856 sg_len
= sg_dma_len(sg
);
2859 offset
= addr
& 0xffff;
2861 if ((offset
+ sg_len
) > 0x10000)
2862 len
= 0x10000 - offset
;
2864 ap
->prd
[idx
].addr
= cpu_to_le32(addr
);
2865 ap
->prd
[idx
].flags_len
= cpu_to_le32(len
& 0xffff);
2866 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx
, addr
, len
);
2875 ap
->prd
[idx
- 1].flags_len
|= cpu_to_le32(ATA_PRD_EOT
);
2878 * ata_check_atapi_dma - Check whether ATAPI DMA can be supported
2879 * @qc: Metadata associated with taskfile to check
2881 * Allow low-level driver to filter ATA PACKET commands, returning
2882 * a status indicating whether or not it is OK to use DMA for the
2883 * supplied PACKET command.
2886 * spin_lock_irqsave(host_set lock)
2888 * RETURNS: 0 when ATAPI DMA can be used
2891 int ata_check_atapi_dma(struct ata_queued_cmd
*qc
)
2893 struct ata_port
*ap
= qc
->ap
;
2894 int rc
= 0; /* Assume ATAPI DMA is OK by default */
2896 if (ap
->ops
->check_atapi_dma
)
2897 rc
= ap
->ops
->check_atapi_dma(qc
);
2902 * ata_qc_prep - Prepare taskfile for submission
2903 * @qc: Metadata associated with taskfile to be prepared
2905 * Prepare ATA taskfile for submission.
2908 * spin_lock_irqsave(host_set lock)
2910 void ata_qc_prep(struct ata_queued_cmd
*qc
)
2912 if (!(qc
->flags
& ATA_QCFLAG_DMAMAP
))
2918 void ata_noop_qc_prep(struct ata_queued_cmd
*qc
) { }
2921 * ata_sg_init_one - Associate command with memory buffer
2922 * @qc: Command to be associated
2923 * @buf: Memory buffer
2924 * @buflen: Length of memory buffer, in bytes.
2926 * Initialize the data-related elements of queued_cmd @qc
2927 * to point to a single memory buffer, @buf of byte length @buflen.
2930 * spin_lock_irqsave(host_set lock)
2933 void ata_sg_init_one(struct ata_queued_cmd
*qc
, void *buf
, unsigned int buflen
)
2935 struct scatterlist
*sg
;
2937 qc
->flags
|= ATA_QCFLAG_SINGLE
;
2939 memset(&qc
->sgent
, 0, sizeof(qc
->sgent
));
2940 qc
->__sg
= &qc
->sgent
;
2942 qc
->orig_n_elem
= 1;
2946 sg_init_one(sg
, buf
, buflen
);
2950 * ata_sg_init - Associate command with scatter-gather table.
2951 * @qc: Command to be associated
2952 * @sg: Scatter-gather table.
2953 * @n_elem: Number of elements in s/g table.
2955 * Initialize the data-related elements of queued_cmd @qc
2956 * to point to a scatter-gather table @sg, containing @n_elem
2960 * spin_lock_irqsave(host_set lock)
2963 void ata_sg_init(struct ata_queued_cmd
*qc
, struct scatterlist
*sg
,
2964 unsigned int n_elem
)
2966 qc
->flags
|= ATA_QCFLAG_SG
;
2968 qc
->n_elem
= n_elem
;
2969 qc
->orig_n_elem
= n_elem
;
2973 * ata_sg_setup_one - DMA-map the memory buffer associated with a command.
2974 * @qc: Command with memory buffer to be mapped.
2976 * DMA-map the memory buffer associated with queued_cmd @qc.
2979 * spin_lock_irqsave(host_set lock)
2982 * Zero on success, negative on error.
2985 static int ata_sg_setup_one(struct ata_queued_cmd
*qc
)
2987 struct ata_port
*ap
= qc
->ap
;
2988 int dir
= qc
->dma_dir
;
2989 struct scatterlist
*sg
= qc
->__sg
;
2990 dma_addr_t dma_address
;
2993 /* we must lengthen transfers to end on a 32-bit boundary */
2994 qc
->pad_len
= sg
->length
& 3;
2996 void *pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
2997 struct scatterlist
*psg
= &qc
->pad_sgent
;
2999 WARN_ON(qc
->dev
->class != ATA_DEV_ATAPI
);
3001 memset(pad_buf
, 0, ATA_DMA_PAD_SZ
);
3003 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
)
3004 memcpy(pad_buf
, qc
->buf_virt
+ sg
->length
- qc
->pad_len
,
3007 sg_dma_address(psg
) = ap
->pad_dma
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
3008 sg_dma_len(psg
) = ATA_DMA_PAD_SZ
;
3010 sg
->length
-= qc
->pad_len
;
3011 if (sg
->length
== 0)
3014 DPRINTK("padding done, sg->length=%u pad_len=%u\n",
3015 sg
->length
, qc
->pad_len
);
3023 dma_address
= dma_map_single(ap
->host_set
->dev
, qc
->buf_virt
,
3025 if (dma_mapping_error(dma_address
)) {
3027 sg
->length
+= qc
->pad_len
;
3031 sg_dma_address(sg
) = dma_address
;
3032 sg_dma_len(sg
) = sg
->length
;
3035 DPRINTK("mapped buffer of %d bytes for %s\n", sg_dma_len(sg
),
3036 qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
3042 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
3043 * @qc: Command with scatter-gather table to be mapped.
3045 * DMA-map the scatter-gather table associated with queued_cmd @qc.
3048 * spin_lock_irqsave(host_set lock)
3051 * Zero on success, negative on error.
3055 static int ata_sg_setup(struct ata_queued_cmd
*qc
)
3057 struct ata_port
*ap
= qc
->ap
;
3058 struct scatterlist
*sg
= qc
->__sg
;
3059 struct scatterlist
*lsg
= &sg
[qc
->n_elem
- 1];
3060 int n_elem
, pre_n_elem
, dir
, trim_sg
= 0;
3062 VPRINTK("ENTER, ata%u\n", ap
->id
);
3063 WARN_ON(!(qc
->flags
& ATA_QCFLAG_SG
));
3065 /* we must lengthen transfers to end on a 32-bit boundary */
3066 qc
->pad_len
= lsg
->length
& 3;
3068 void *pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
3069 struct scatterlist
*psg
= &qc
->pad_sgent
;
3070 unsigned int offset
;
3072 WARN_ON(qc
->dev
->class != ATA_DEV_ATAPI
);
3074 memset(pad_buf
, 0, ATA_DMA_PAD_SZ
);
3077 * psg->page/offset are used to copy to-be-written
3078 * data in this function or read data in ata_sg_clean.
3080 offset
= lsg
->offset
+ lsg
->length
- qc
->pad_len
;
3081 psg
->page
= nth_page(lsg
->page
, offset
>> PAGE_SHIFT
);
3082 psg
->offset
= offset_in_page(offset
);
3084 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
) {
3085 void *addr
= kmap_atomic(psg
->page
, KM_IRQ0
);
3086 memcpy(pad_buf
, addr
+ psg
->offset
, qc
->pad_len
);
3087 kunmap_atomic(addr
, KM_IRQ0
);
3090 sg_dma_address(psg
) = ap
->pad_dma
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
3091 sg_dma_len(psg
) = ATA_DMA_PAD_SZ
;
3093 lsg
->length
-= qc
->pad_len
;
3094 if (lsg
->length
== 0)
3097 DPRINTK("padding done, sg[%d].length=%u pad_len=%u\n",
3098 qc
->n_elem
- 1, lsg
->length
, qc
->pad_len
);
3101 pre_n_elem
= qc
->n_elem
;
3102 if (trim_sg
&& pre_n_elem
)
3111 n_elem
= dma_map_sg(ap
->host_set
->dev
, sg
, pre_n_elem
, dir
);
3113 /* restore last sg */
3114 lsg
->length
+= qc
->pad_len
;
3118 DPRINTK("%d sg elements mapped\n", n_elem
);
3121 qc
->n_elem
= n_elem
;
3127 * ata_poll_qc_complete - turn irq back on and finish qc
3128 * @qc: Command to complete
3129 * @err_mask: ATA status register content
3132 * None. (grabs host lock)
3135 void ata_poll_qc_complete(struct ata_queued_cmd
*qc
)
3137 struct ata_port
*ap
= qc
->ap
;
3138 unsigned long flags
;
3140 spin_lock_irqsave(&ap
->host_set
->lock
, flags
);
3141 ap
->flags
&= ~ATA_FLAG_NOINTR
;
3143 ata_qc_complete(qc
);
3144 spin_unlock_irqrestore(&ap
->host_set
->lock
, flags
);
3148 * ata_pio_poll - poll using PIO, depending on current state
3149 * @ap: the target ata_port
3152 * None. (executing in kernel thread context)
3155 * timeout value to use
3158 static unsigned long ata_pio_poll(struct ata_port
*ap
)
3160 struct ata_queued_cmd
*qc
;
3162 unsigned int poll_state
= HSM_ST_UNKNOWN
;
3163 unsigned int reg_state
= HSM_ST_UNKNOWN
;
3165 qc
= ata_qc_from_tag(ap
, ap
->active_tag
);
3166 WARN_ON(qc
== NULL
);
3168 switch (ap
->hsm_task_state
) {
3171 poll_state
= HSM_ST_POLL
;
3175 case HSM_ST_LAST_POLL
:
3176 poll_state
= HSM_ST_LAST_POLL
;
3177 reg_state
= HSM_ST_LAST
;
3184 status
= ata_chk_status(ap
);
3185 if (status
& ATA_BUSY
) {
3186 if (time_after(jiffies
, ap
->pio_task_timeout
)) {
3187 qc
->err_mask
|= AC_ERR_TIMEOUT
;
3188 ap
->hsm_task_state
= HSM_ST_TMOUT
;
3191 ap
->hsm_task_state
= poll_state
;
3192 return ATA_SHORT_PAUSE
;
3195 ap
->hsm_task_state
= reg_state
;
3200 * ata_pio_complete - check if drive is busy or idle
3201 * @ap: the target ata_port
3204 * None. (executing in kernel thread context)
3207 * Non-zero if qc completed, zero otherwise.
3210 static int ata_pio_complete (struct ata_port
*ap
)
3212 struct ata_queued_cmd
*qc
;
3216 * This is purely heuristic. This is a fast path. Sometimes when
3217 * we enter, BSY will be cleared in a chk-status or two. If not,
3218 * the drive is probably seeking or something. Snooze for a couple
3219 * msecs, then chk-status again. If still busy, fall back to
3220 * HSM_ST_POLL state.
3222 drv_stat
= ata_busy_wait(ap
, ATA_BUSY
, 10);
3223 if (drv_stat
& ATA_BUSY
) {
3225 drv_stat
= ata_busy_wait(ap
, ATA_BUSY
, 10);
3226 if (drv_stat
& ATA_BUSY
) {
3227 ap
->hsm_task_state
= HSM_ST_LAST_POLL
;
3228 ap
->pio_task_timeout
= jiffies
+ ATA_TMOUT_PIO
;
3233 qc
= ata_qc_from_tag(ap
, ap
->active_tag
);
3234 WARN_ON(qc
== NULL
);
3236 drv_stat
= ata_wait_idle(ap
);
3237 if (!ata_ok(drv_stat
)) {
3238 qc
->err_mask
|= __ac_err_mask(drv_stat
);
3239 ap
->hsm_task_state
= HSM_ST_ERR
;
3243 ap
->hsm_task_state
= HSM_ST_IDLE
;
3245 WARN_ON(qc
->err_mask
);
3246 ata_poll_qc_complete(qc
);
3248 /* another command may start at this point */
3255 * swap_buf_le16 - swap halves of 16-bit words in place
3256 * @buf: Buffer to swap
3257 * @buf_words: Number of 16-bit words in buffer.
3259 * Swap halves of 16-bit words if needed to convert from
3260 * little-endian byte order to native cpu byte order, or
3264 * Inherited from caller.
3266 void swap_buf_le16(u16
*buf
, unsigned int buf_words
)
3271 for (i
= 0; i
< buf_words
; i
++)
3272 buf
[i
] = le16_to_cpu(buf
[i
]);
3273 #endif /* __BIG_ENDIAN */
3277 * ata_mmio_data_xfer - Transfer data by MMIO
3278 * @ap: port to read/write
3280 * @buflen: buffer length
3281 * @write_data: read/write
3283 * Transfer data from/to the device data register by MMIO.
3286 * Inherited from caller.
3289 static void ata_mmio_data_xfer(struct ata_port
*ap
, unsigned char *buf
,
3290 unsigned int buflen
, int write_data
)
3293 unsigned int words
= buflen
>> 1;
3294 u16
*buf16
= (u16
*) buf
;
3295 void __iomem
*mmio
= (void __iomem
*)ap
->ioaddr
.data_addr
;
3297 /* Transfer multiple of 2 bytes */
3299 for (i
= 0; i
< words
; i
++)
3300 writew(le16_to_cpu(buf16
[i
]), mmio
);
3302 for (i
= 0; i
< words
; i
++)
3303 buf16
[i
] = cpu_to_le16(readw(mmio
));
3306 /* Transfer trailing 1 byte, if any. */
3307 if (unlikely(buflen
& 0x01)) {
3308 u16 align_buf
[1] = { 0 };
3309 unsigned char *trailing_buf
= buf
+ buflen
- 1;
3312 memcpy(align_buf
, trailing_buf
, 1);
3313 writew(le16_to_cpu(align_buf
[0]), mmio
);
3315 align_buf
[0] = cpu_to_le16(readw(mmio
));
3316 memcpy(trailing_buf
, align_buf
, 1);
3322 * ata_pio_data_xfer - Transfer data by PIO
3323 * @ap: port to read/write
3325 * @buflen: buffer length
3326 * @write_data: read/write
3328 * Transfer data from/to the device data register by PIO.
3331 * Inherited from caller.
3334 static void ata_pio_data_xfer(struct ata_port
*ap
, unsigned char *buf
,
3335 unsigned int buflen
, int write_data
)
3337 unsigned int words
= buflen
>> 1;
3339 /* Transfer multiple of 2 bytes */
3341 outsw(ap
->ioaddr
.data_addr
, buf
, words
);
3343 insw(ap
->ioaddr
.data_addr
, buf
, words
);
3345 /* Transfer trailing 1 byte, if any. */
3346 if (unlikely(buflen
& 0x01)) {
3347 u16 align_buf
[1] = { 0 };
3348 unsigned char *trailing_buf
= buf
+ buflen
- 1;
3351 memcpy(align_buf
, trailing_buf
, 1);
3352 outw(le16_to_cpu(align_buf
[0]), ap
->ioaddr
.data_addr
);
3354 align_buf
[0] = cpu_to_le16(inw(ap
->ioaddr
.data_addr
));
3355 memcpy(trailing_buf
, align_buf
, 1);
3361 * ata_data_xfer - Transfer data from/to the data register.
3362 * @ap: port to read/write
3364 * @buflen: buffer length
3365 * @do_write: read/write
3367 * Transfer data from/to the device data register.
3370 * Inherited from caller.
3373 static void ata_data_xfer(struct ata_port
*ap
, unsigned char *buf
,
3374 unsigned int buflen
, int do_write
)
3376 /* Make the crap hardware pay the costs not the good stuff */
3377 if (unlikely(ap
->flags
& ATA_FLAG_IRQ_MASK
)) {
3378 unsigned long flags
;
3379 local_irq_save(flags
);
3380 if (ap
->flags
& ATA_FLAG_MMIO
)
3381 ata_mmio_data_xfer(ap
, buf
, buflen
, do_write
);
3383 ata_pio_data_xfer(ap
, buf
, buflen
, do_write
);
3384 local_irq_restore(flags
);
3386 if (ap
->flags
& ATA_FLAG_MMIO
)
3387 ata_mmio_data_xfer(ap
, buf
, buflen
, do_write
);
3389 ata_pio_data_xfer(ap
, buf
, buflen
, do_write
);
3394 * ata_pio_sector - Transfer ATA_SECT_SIZE (512 bytes) of data.
3395 * @qc: Command on going
3397 * Transfer ATA_SECT_SIZE of data from/to the ATA device.
3400 * Inherited from caller.
3403 static void ata_pio_sector(struct ata_queued_cmd
*qc
)
3405 int do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
);
3406 struct scatterlist
*sg
= qc
->__sg
;
3407 struct ata_port
*ap
= qc
->ap
;
3409 unsigned int offset
;
3412 if (qc
->cursect
== (qc
->nsect
- 1))
3413 ap
->hsm_task_state
= HSM_ST_LAST
;
3415 page
= sg
[qc
->cursg
].page
;
3416 offset
= sg
[qc
->cursg
].offset
+ qc
->cursg_ofs
* ATA_SECT_SIZE
;
3418 /* get the current page and offset */
3419 page
= nth_page(page
, (offset
>> PAGE_SHIFT
));
3420 offset
%= PAGE_SIZE
;
3422 buf
= kmap(page
) + offset
;
3427 if ((qc
->cursg_ofs
* ATA_SECT_SIZE
) == (&sg
[qc
->cursg
])->length
) {
3432 DPRINTK("data %s\n", qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
3434 /* do the actual data transfer */
3435 do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
);
3436 ata_data_xfer(ap
, buf
, ATA_SECT_SIZE
, do_write
);
3442 * __atapi_pio_bytes - Transfer data from/to the ATAPI device.
3443 * @qc: Command on going
3444 * @bytes: number of bytes
3446 * Transfer Transfer data from/to the ATAPI device.
3449 * Inherited from caller.
3453 static void __atapi_pio_bytes(struct ata_queued_cmd
*qc
, unsigned int bytes
)
3455 int do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
);
3456 struct scatterlist
*sg
= qc
->__sg
;
3457 struct ata_port
*ap
= qc
->ap
;
3460 unsigned int offset
, count
;
3462 if (qc
->curbytes
+ bytes
>= qc
->nbytes
)
3463 ap
->hsm_task_state
= HSM_ST_LAST
;
3466 if (unlikely(qc
->cursg
>= qc
->n_elem
)) {
3468 * The end of qc->sg is reached and the device expects
3469 * more data to transfer. In order not to overrun qc->sg
3470 * and fulfill length specified in the byte count register,
3471 * - for read case, discard trailing data from the device
3472 * - for write case, padding zero data to the device
3474 u16 pad_buf
[1] = { 0 };
3475 unsigned int words
= bytes
>> 1;
3478 if (words
) /* warning if bytes > 1 */
3479 printk(KERN_WARNING
"ata%u: %u bytes trailing data\n",
3482 for (i
= 0; i
< words
; i
++)
3483 ata_data_xfer(ap
, (unsigned char*)pad_buf
, 2, do_write
);
3485 ap
->hsm_task_state
= HSM_ST_LAST
;
3489 sg
= &qc
->__sg
[qc
->cursg
];
3492 offset
= sg
->offset
+ qc
->cursg_ofs
;
3494 /* get the current page and offset */
3495 page
= nth_page(page
, (offset
>> PAGE_SHIFT
));
3496 offset
%= PAGE_SIZE
;
3498 /* don't overrun current sg */
3499 count
= min(sg
->length
- qc
->cursg_ofs
, bytes
);
3501 /* don't cross page boundaries */
3502 count
= min(count
, (unsigned int)PAGE_SIZE
- offset
);
3504 buf
= kmap(page
) + offset
;
3507 qc
->curbytes
+= count
;
3508 qc
->cursg_ofs
+= count
;
3510 if (qc
->cursg_ofs
== sg
->length
) {
3515 DPRINTK("data %s\n", qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
3517 /* do the actual data transfer */
3518 ata_data_xfer(ap
, buf
, count
, do_write
);
3527 * atapi_pio_bytes - Transfer data from/to the ATAPI device.
3528 * @qc: Command on going
3530 * Transfer Transfer data from/to the ATAPI device.
3533 * Inherited from caller.
3536 static void atapi_pio_bytes(struct ata_queued_cmd
*qc
)
3538 struct ata_port
*ap
= qc
->ap
;
3539 struct ata_device
*dev
= qc
->dev
;
3540 unsigned int ireason
, bc_lo
, bc_hi
, bytes
;
3541 int i_write
, do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
) ? 1 : 0;
3543 ap
->ops
->tf_read(ap
, &qc
->tf
);
3544 ireason
= qc
->tf
.nsect
;
3545 bc_lo
= qc
->tf
.lbam
;
3546 bc_hi
= qc
->tf
.lbah
;
3547 bytes
= (bc_hi
<< 8) | bc_lo
;
3549 /* shall be cleared to zero, indicating xfer of data */
3550 if (ireason
& (1 << 0))
3553 /* make sure transfer direction matches expected */
3554 i_write
= ((ireason
& (1 << 1)) == 0) ? 1 : 0;
3555 if (do_write
!= i_write
)
3558 __atapi_pio_bytes(qc
, bytes
);
3563 printk(KERN_INFO
"ata%u: dev %u: ATAPI check failed\n",
3564 ap
->id
, dev
->devno
);
3565 qc
->err_mask
|= AC_ERR_HSM
;
3566 ap
->hsm_task_state
= HSM_ST_ERR
;
3570 * ata_pio_block - start PIO on a block
3571 * @ap: the target ata_port
3574 * None. (executing in kernel thread context)
3577 static void ata_pio_block(struct ata_port
*ap
)
3579 struct ata_queued_cmd
*qc
;
3583 * This is purely heuristic. This is a fast path.
3584 * Sometimes when we enter, BSY will be cleared in
3585 * a chk-status or two. If not, the drive is probably seeking
3586 * or something. Snooze for a couple msecs, then
3587 * chk-status again. If still busy, fall back to
3588 * HSM_ST_POLL state.
3590 status
= ata_busy_wait(ap
, ATA_BUSY
, 5);
3591 if (status
& ATA_BUSY
) {
3593 status
= ata_busy_wait(ap
, ATA_BUSY
, 10);
3594 if (status
& ATA_BUSY
) {
3595 ap
->hsm_task_state
= HSM_ST_POLL
;
3596 ap
->pio_task_timeout
= jiffies
+ ATA_TMOUT_PIO
;
3601 qc
= ata_qc_from_tag(ap
, ap
->active_tag
);
3602 WARN_ON(qc
== NULL
);
3605 if (status
& (ATA_ERR
| ATA_DF
)) {
3606 qc
->err_mask
|= AC_ERR_DEV
;
3607 ap
->hsm_task_state
= HSM_ST_ERR
;
3611 /* transfer data if any */
3612 if (is_atapi_taskfile(&qc
->tf
)) {
3613 /* DRQ=0 means no more data to transfer */
3614 if ((status
& ATA_DRQ
) == 0) {
3615 ap
->hsm_task_state
= HSM_ST_LAST
;
3619 atapi_pio_bytes(qc
);
3621 /* handle BSY=0, DRQ=0 as error */
3622 if ((status
& ATA_DRQ
) == 0) {
3623 qc
->err_mask
|= AC_ERR_HSM
;
3624 ap
->hsm_task_state
= HSM_ST_ERR
;
3632 static void ata_pio_error(struct ata_port
*ap
)
3634 struct ata_queued_cmd
*qc
;
3636 qc
= ata_qc_from_tag(ap
, ap
->active_tag
);
3637 WARN_ON(qc
== NULL
);
3639 if (qc
->tf
.command
!= ATA_CMD_PACKET
)
3640 printk(KERN_WARNING
"ata%u: PIO error\n", ap
->id
);
3642 /* make sure qc->err_mask is available to
3643 * know what's wrong and recover
3645 WARN_ON(qc
->err_mask
== 0);
3647 ap
->hsm_task_state
= HSM_ST_IDLE
;
3649 ata_poll_qc_complete(qc
);
3652 static void ata_pio_task(void *_data
)
3654 struct ata_port
*ap
= _data
;
3655 unsigned long timeout
;
3662 switch (ap
->hsm_task_state
) {
3671 qc_completed
= ata_pio_complete(ap
);
3675 case HSM_ST_LAST_POLL
:
3676 timeout
= ata_pio_poll(ap
);
3686 ata_port_queue_task(ap
, ata_pio_task
, ap
, timeout
);
3687 else if (!qc_completed
)
3692 * atapi_packet_task - Write CDB bytes to hardware
3693 * @_data: Port to which ATAPI device is attached.
3695 * When device has indicated its readiness to accept
3696 * a CDB, this function is called. Send the CDB.
3697 * If DMA is to be performed, exit immediately.
3698 * Otherwise, we are in polling mode, so poll
3699 * status under operation succeeds or fails.
3702 * Kernel thread context (may sleep)
3705 static void atapi_packet_task(void *_data
)
3707 struct ata_port
*ap
= _data
;
3708 struct ata_queued_cmd
*qc
;
3711 qc
= ata_qc_from_tag(ap
, ap
->active_tag
);
3712 WARN_ON(qc
== NULL
);
3713 WARN_ON(!(qc
->flags
& ATA_QCFLAG_ACTIVE
));
3715 /* sleep-wait for BSY to clear */
3716 DPRINTK("busy wait\n");
3717 if (ata_busy_sleep(ap
, ATA_TMOUT_CDB_QUICK
, ATA_TMOUT_CDB
)) {
3718 qc
->err_mask
|= AC_ERR_TIMEOUT
;
3722 /* make sure DRQ is set */
3723 status
= ata_chk_status(ap
);
3724 if ((status
& (ATA_BUSY
| ATA_DRQ
)) != ATA_DRQ
) {
3725 qc
->err_mask
|= AC_ERR_HSM
;
3730 DPRINTK("send cdb\n");
3731 WARN_ON(qc
->dev
->cdb_len
< 12);
3733 if (qc
->tf
.protocol
== ATA_PROT_ATAPI_DMA
||
3734 qc
->tf
.protocol
== ATA_PROT_ATAPI_NODATA
) {
3735 unsigned long flags
;
3737 /* Once we're done issuing command and kicking bmdma,
3738 * irq handler takes over. To not lose irq, we need
3739 * to clear NOINTR flag before sending cdb, but
3740 * interrupt handler shouldn't be invoked before we're
3741 * finished. Hence, the following locking.
3743 spin_lock_irqsave(&ap
->host_set
->lock
, flags
);
3744 ap
->flags
&= ~ATA_FLAG_NOINTR
;
3745 ata_data_xfer(ap
, qc
->cdb
, qc
->dev
->cdb_len
, 1);
3746 if (qc
->tf
.protocol
== ATA_PROT_ATAPI_DMA
)
3747 ap
->ops
->bmdma_start(qc
); /* initiate bmdma */
3748 spin_unlock_irqrestore(&ap
->host_set
->lock
, flags
);
3750 ata_data_xfer(ap
, qc
->cdb
, qc
->dev
->cdb_len
, 1);
3752 /* PIO commands are handled by polling */
3753 ap
->hsm_task_state
= HSM_ST
;
3754 ata_port_queue_task(ap
, ata_pio_task
, ap
, 0);
3760 ata_poll_qc_complete(qc
);
3764 * ata_qc_timeout - Handle timeout of queued command
3765 * @qc: Command that timed out
3767 * Some part of the kernel (currently, only the SCSI layer)
3768 * has noticed that the active command on port @ap has not
3769 * completed after a specified length of time. Handle this
3770 * condition by disabling DMA (if necessary) and completing
3771 * transactions, with error if necessary.
3773 * This also handles the case of the "lost interrupt", where
3774 * for some reason (possibly hardware bug, possibly driver bug)
3775 * an interrupt was not delivered to the driver, even though the
3776 * transaction completed successfully.
3779 * Inherited from SCSI layer (none, can sleep)
3782 static void ata_qc_timeout(struct ata_queued_cmd
*qc
)
3784 struct ata_port
*ap
= qc
->ap
;
3785 struct ata_host_set
*host_set
= ap
->host_set
;
3786 u8 host_stat
= 0, drv_stat
;
3787 unsigned long flags
;
3791 ap
->hsm_task_state
= HSM_ST_IDLE
;
3793 spin_lock_irqsave(&host_set
->lock
, flags
);
3795 switch (qc
->tf
.protocol
) {
3798 case ATA_PROT_ATAPI_DMA
:
3799 host_stat
= ap
->ops
->bmdma_status(ap
);
3801 /* before we do anything else, clear DMA-Start bit */
3802 ap
->ops
->bmdma_stop(qc
);
3808 drv_stat
= ata_chk_status(ap
);
3810 /* ack bmdma irq events */
3811 ap
->ops
->irq_clear(ap
);
3813 printk(KERN_ERR
"ata%u: command 0x%x timeout, stat 0x%x host_stat 0x%x\n",
3814 ap
->id
, qc
->tf
.command
, drv_stat
, host_stat
);
3816 /* complete taskfile transaction */
3817 qc
->err_mask
|= ac_err_mask(drv_stat
);
3821 spin_unlock_irqrestore(&host_set
->lock
, flags
);
3823 ata_eh_qc_complete(qc
);
3829 * ata_eng_timeout - Handle timeout of queued command
3830 * @ap: Port on which timed-out command is active
3832 * Some part of the kernel (currently, only the SCSI layer)
3833 * has noticed that the active command on port @ap has not
3834 * completed after a specified length of time. Handle this
3835 * condition by disabling DMA (if necessary) and completing
3836 * transactions, with error if necessary.
3838 * This also handles the case of the "lost interrupt", where
3839 * for some reason (possibly hardware bug, possibly driver bug)
3840 * an interrupt was not delivered to the driver, even though the
3841 * transaction completed successfully.
3844 * Inherited from SCSI layer (none, can sleep)
3847 void ata_eng_timeout(struct ata_port
*ap
)
3851 ata_qc_timeout(ata_qc_from_tag(ap
, ap
->active_tag
));
3857 * ata_qc_new - Request an available ATA command, for queueing
3858 * @ap: Port associated with device @dev
3859 * @dev: Device from whom we request an available command structure
3865 static struct ata_queued_cmd
*ata_qc_new(struct ata_port
*ap
)
3867 struct ata_queued_cmd
*qc
= NULL
;
3870 for (i
= 0; i
< ATA_MAX_QUEUE
; i
++)
3871 if (!test_and_set_bit(i
, &ap
->qactive
)) {
3872 qc
= ata_qc_from_tag(ap
, i
);
3883 * ata_qc_new_init - Request an available ATA command, and initialize it
3884 * @ap: Port associated with device @dev
3885 * @dev: Device from whom we request an available command structure
3891 struct ata_queued_cmd
*ata_qc_new_init(struct ata_port
*ap
,
3892 struct ata_device
*dev
)
3894 struct ata_queued_cmd
*qc
;
3896 qc
= ata_qc_new(ap
);
3909 * ata_qc_free - free unused ata_queued_cmd
3910 * @qc: Command to complete
3912 * Designed to free unused ata_queued_cmd object
3913 * in case something prevents using it.
3916 * spin_lock_irqsave(host_set lock)
3918 void ata_qc_free(struct ata_queued_cmd
*qc
)
3920 struct ata_port
*ap
= qc
->ap
;
3923 WARN_ON(qc
== NULL
); /* ata_qc_from_tag _might_ return NULL */
3927 if (likely(ata_tag_valid(tag
))) {
3928 if (tag
== ap
->active_tag
)
3929 ap
->active_tag
= ATA_TAG_POISON
;
3930 qc
->tag
= ATA_TAG_POISON
;
3931 clear_bit(tag
, &ap
->qactive
);
3935 void __ata_qc_complete(struct ata_queued_cmd
*qc
)
3937 WARN_ON(qc
== NULL
); /* ata_qc_from_tag _might_ return NULL */
3938 WARN_ON(!(qc
->flags
& ATA_QCFLAG_ACTIVE
));
3940 if (likely(qc
->flags
& ATA_QCFLAG_DMAMAP
))
3943 /* atapi: mark qc as inactive to prevent the interrupt handler
3944 * from completing the command twice later, before the error handler
3945 * is called. (when rc != 0 and atapi request sense is needed)
3947 qc
->flags
&= ~ATA_QCFLAG_ACTIVE
;
3949 /* call completion callback */
3950 qc
->complete_fn(qc
);
3953 static inline int ata_should_dma_map(struct ata_queued_cmd
*qc
)
3955 struct ata_port
*ap
= qc
->ap
;
3957 switch (qc
->tf
.protocol
) {
3959 case ATA_PROT_ATAPI_DMA
:
3962 case ATA_PROT_ATAPI
:
3964 if (ap
->flags
& ATA_FLAG_PIO_DMA
)
3977 * ata_qc_issue - issue taskfile to device
3978 * @qc: command to issue to device
3980 * Prepare an ATA command to submission to device.
3981 * This includes mapping the data into a DMA-able
3982 * area, filling in the S/G table, and finally
3983 * writing the taskfile to hardware, starting the command.
3986 * spin_lock_irqsave(host_set lock)
3989 * Zero on success, AC_ERR_* mask on failure
3992 unsigned int ata_qc_issue(struct ata_queued_cmd
*qc
)
3994 struct ata_port
*ap
= qc
->ap
;
3996 if (ata_should_dma_map(qc
)) {
3997 if (qc
->flags
& ATA_QCFLAG_SG
) {
3998 if (ata_sg_setup(qc
))
4000 } else if (qc
->flags
& ATA_QCFLAG_SINGLE
) {
4001 if (ata_sg_setup_one(qc
))
4005 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
4008 ap
->ops
->qc_prep(qc
);
4010 qc
->ap
->active_tag
= qc
->tag
;
4011 qc
->flags
|= ATA_QCFLAG_ACTIVE
;
4013 return ap
->ops
->qc_issue(qc
);
4016 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
4017 return AC_ERR_SYSTEM
;
4022 * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner
4023 * @qc: command to issue to device
4025 * Using various libata functions and hooks, this function
4026 * starts an ATA command. ATA commands are grouped into
4027 * classes called "protocols", and issuing each type of protocol
4028 * is slightly different.
4030 * May be used as the qc_issue() entry in ata_port_operations.
4033 * spin_lock_irqsave(host_set lock)
4036 * Zero on success, AC_ERR_* mask on failure
4039 unsigned int ata_qc_issue_prot(struct ata_queued_cmd
*qc
)
4041 struct ata_port
*ap
= qc
->ap
;
4043 ata_dev_select(ap
, qc
->dev
->devno
, 1, 0);
4045 switch (qc
->tf
.protocol
) {
4046 case ATA_PROT_NODATA
:
4047 ata_tf_to_host(ap
, &qc
->tf
);
4051 ap
->ops
->tf_load(ap
, &qc
->tf
); /* load tf registers */
4052 ap
->ops
->bmdma_setup(qc
); /* set up bmdma */
4053 ap
->ops
->bmdma_start(qc
); /* initiate bmdma */
4056 case ATA_PROT_PIO
: /* load tf registers, initiate polling pio */
4057 ata_qc_set_polling(qc
);
4058 ata_tf_to_host(ap
, &qc
->tf
);
4059 ap
->hsm_task_state
= HSM_ST
;
4060 ata_port_queue_task(ap
, ata_pio_task
, ap
, 0);
4063 case ATA_PROT_ATAPI
:
4064 ata_qc_set_polling(qc
);
4065 ata_tf_to_host(ap
, &qc
->tf
);
4066 ata_port_queue_task(ap
, atapi_packet_task
, ap
, 0);
4069 case ATA_PROT_ATAPI_NODATA
:
4070 ap
->flags
|= ATA_FLAG_NOINTR
;
4071 ata_tf_to_host(ap
, &qc
->tf
);
4072 ata_port_queue_task(ap
, atapi_packet_task
, ap
, 0);
4075 case ATA_PROT_ATAPI_DMA
:
4076 ap
->flags
|= ATA_FLAG_NOINTR
;
4077 ap
->ops
->tf_load(ap
, &qc
->tf
); /* load tf registers */
4078 ap
->ops
->bmdma_setup(qc
); /* set up bmdma */
4079 ata_port_queue_task(ap
, atapi_packet_task
, ap
, 0);
4084 return AC_ERR_SYSTEM
;
4091 * ata_host_intr - Handle host interrupt for given (port, task)
4092 * @ap: Port on which interrupt arrived (possibly...)
4093 * @qc: Taskfile currently active in engine
4095 * Handle host interrupt for given queued command. Currently,
4096 * only DMA interrupts are handled. All other commands are
4097 * handled via polling with interrupts disabled (nIEN bit).
4100 * spin_lock_irqsave(host_set lock)
4103 * One if interrupt was handled, zero if not (shared irq).
4106 inline unsigned int ata_host_intr (struct ata_port
*ap
,
4107 struct ata_queued_cmd
*qc
)
4109 u8 status
, host_stat
;
4111 switch (qc
->tf
.protocol
) {
4114 case ATA_PROT_ATAPI_DMA
:
4115 case ATA_PROT_ATAPI
:
4116 /* check status of DMA engine */
4117 host_stat
= ap
->ops
->bmdma_status(ap
);
4118 VPRINTK("ata%u: host_stat 0x%X\n", ap
->id
, host_stat
);
4120 /* if it's not our irq... */
4121 if (!(host_stat
& ATA_DMA_INTR
))
4124 /* before we do anything else, clear DMA-Start bit */
4125 ap
->ops
->bmdma_stop(qc
);
4129 case ATA_PROT_ATAPI_NODATA
:
4130 case ATA_PROT_NODATA
:
4131 /* check altstatus */
4132 status
= ata_altstatus(ap
);
4133 if (status
& ATA_BUSY
)
4136 /* check main status, clearing INTRQ */
4137 status
= ata_chk_status(ap
);
4138 if (unlikely(status
& ATA_BUSY
))
4140 DPRINTK("ata%u: protocol %d (dev_stat 0x%X)\n",
4141 ap
->id
, qc
->tf
.protocol
, status
);
4143 /* ack bmdma irq events */
4144 ap
->ops
->irq_clear(ap
);
4146 /* complete taskfile transaction */
4147 qc
->err_mask
|= ac_err_mask(status
);
4148 ata_qc_complete(qc
);
4155 return 1; /* irq handled */
4158 ap
->stats
.idle_irq
++;
4161 if ((ap
->stats
.idle_irq
% 1000) == 0) {
4162 ata_irq_ack(ap
, 0); /* debug trap */
4163 printk(KERN_WARNING
"ata%d: irq trap\n", ap
->id
);
4167 return 0; /* irq not handled */
4171 * ata_interrupt - Default ATA host interrupt handler
4172 * @irq: irq line (unused)
4173 * @dev_instance: pointer to our ata_host_set information structure
4176 * Default interrupt handler for PCI IDE devices. Calls
4177 * ata_host_intr() for each port that is not disabled.
4180 * Obtains host_set lock during operation.
4183 * IRQ_NONE or IRQ_HANDLED.
4186 irqreturn_t
ata_interrupt (int irq
, void *dev_instance
, struct pt_regs
*regs
)
4188 struct ata_host_set
*host_set
= dev_instance
;
4190 unsigned int handled
= 0;
4191 unsigned long flags
;
4193 /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */
4194 spin_lock_irqsave(&host_set
->lock
, flags
);
4196 for (i
= 0; i
< host_set
->n_ports
; i
++) {
4197 struct ata_port
*ap
;
4199 ap
= host_set
->ports
[i
];
4201 !(ap
->flags
& (ATA_FLAG_PORT_DISABLED
| ATA_FLAG_NOINTR
))) {
4202 struct ata_queued_cmd
*qc
;
4204 qc
= ata_qc_from_tag(ap
, ap
->active_tag
);
4205 if (qc
&& (!(qc
->tf
.ctl
& ATA_NIEN
)) &&
4206 (qc
->flags
& ATA_QCFLAG_ACTIVE
))
4207 handled
|= ata_host_intr(ap
, qc
);
4211 spin_unlock_irqrestore(&host_set
->lock
, flags
);
4213 return IRQ_RETVAL(handled
);
4218 * Execute a 'simple' command, that only consists of the opcode 'cmd' itself,
4219 * without filling any other registers
4221 static int ata_do_simple_cmd(struct ata_port
*ap
, struct ata_device
*dev
,
4224 struct ata_taskfile tf
;
4227 ata_tf_init(ap
, &tf
, dev
->devno
);
4230 tf
.flags
|= ATA_TFLAG_DEVICE
;
4231 tf
.protocol
= ATA_PROT_NODATA
;
4233 err
= ata_exec_internal(ap
, dev
, &tf
, DMA_NONE
, NULL
, 0);
4235 printk(KERN_ERR
"%s: ata command failed: %d\n",
4241 static int ata_flush_cache(struct ata_port
*ap
, struct ata_device
*dev
)
4245 if (!ata_try_flush_cache(dev
))
4248 if (ata_id_has_flush_ext(dev
->id
))
4249 cmd
= ATA_CMD_FLUSH_EXT
;
4251 cmd
= ATA_CMD_FLUSH
;
4253 return ata_do_simple_cmd(ap
, dev
, cmd
);
4256 static int ata_standby_drive(struct ata_port
*ap
, struct ata_device
*dev
)
4258 return ata_do_simple_cmd(ap
, dev
, ATA_CMD_STANDBYNOW1
);
4261 static int ata_start_drive(struct ata_port
*ap
, struct ata_device
*dev
)
4263 return ata_do_simple_cmd(ap
, dev
, ATA_CMD_IDLEIMMEDIATE
);
4267 * ata_device_resume - wakeup a previously suspended devices
4268 * @ap: port the device is connected to
4269 * @dev: the device to resume
4271 * Kick the drive back into action, by sending it an idle immediate
4272 * command and making sure its transfer mode matches between drive
4276 int ata_device_resume(struct ata_port
*ap
, struct ata_device
*dev
)
4278 if (ap
->flags
& ATA_FLAG_SUSPENDED
) {
4279 ap
->flags
&= ~ATA_FLAG_SUSPENDED
;
4282 if (!ata_dev_present(dev
))
4284 if (dev
->class == ATA_DEV_ATA
)
4285 ata_start_drive(ap
, dev
);
4291 * ata_device_suspend - prepare a device for suspend
4292 * @ap: port the device is connected to
4293 * @dev: the device to suspend
4295 * Flush the cache on the drive, if appropriate, then issue a
4296 * standbynow command.
4298 int ata_device_suspend(struct ata_port
*ap
, struct ata_device
*dev
)
4300 if (!ata_dev_present(dev
))
4302 if (dev
->class == ATA_DEV_ATA
)
4303 ata_flush_cache(ap
, dev
);
4305 ata_standby_drive(ap
, dev
);
4306 ap
->flags
|= ATA_FLAG_SUSPENDED
;
4311 * ata_port_start - Set port up for dma.
4312 * @ap: Port to initialize
4314 * Called just after data structures for each port are
4315 * initialized. Allocates space for PRD table.
4317 * May be used as the port_start() entry in ata_port_operations.
4320 * Inherited from caller.
4323 int ata_port_start (struct ata_port
*ap
)
4325 struct device
*dev
= ap
->host_set
->dev
;
4328 ap
->prd
= dma_alloc_coherent(dev
, ATA_PRD_TBL_SZ
, &ap
->prd_dma
, GFP_KERNEL
);
4332 rc
= ata_pad_alloc(ap
, dev
);
4334 dma_free_coherent(dev
, ATA_PRD_TBL_SZ
, ap
->prd
, ap
->prd_dma
);
4338 DPRINTK("prd alloc, virt %p, dma %llx\n", ap
->prd
, (unsigned long long) ap
->prd_dma
);
4345 * ata_port_stop - Undo ata_port_start()
4346 * @ap: Port to shut down
4348 * Frees the PRD table.
4350 * May be used as the port_stop() entry in ata_port_operations.
4353 * Inherited from caller.
4356 void ata_port_stop (struct ata_port
*ap
)
4358 struct device
*dev
= ap
->host_set
->dev
;
4360 dma_free_coherent(dev
, ATA_PRD_TBL_SZ
, ap
->prd
, ap
->prd_dma
);
4361 ata_pad_free(ap
, dev
);
4364 void ata_host_stop (struct ata_host_set
*host_set
)
4366 if (host_set
->mmio_base
)
4367 iounmap(host_set
->mmio_base
);
4372 * ata_host_remove - Unregister SCSI host structure with upper layers
4373 * @ap: Port to unregister
4374 * @do_unregister: 1 if we fully unregister, 0 to just stop the port
4377 * Inherited from caller.
4380 static void ata_host_remove(struct ata_port
*ap
, unsigned int do_unregister
)
4382 struct Scsi_Host
*sh
= ap
->host
;
4387 scsi_remove_host(sh
);
4389 ap
->ops
->port_stop(ap
);
4393 * ata_host_init - Initialize an ata_port structure
4394 * @ap: Structure to initialize
4395 * @host: associated SCSI mid-layer structure
4396 * @host_set: Collection of hosts to which @ap belongs
4397 * @ent: Probe information provided by low-level driver
4398 * @port_no: Port number associated with this ata_port
4400 * Initialize a new ata_port structure, and its associated
4404 * Inherited from caller.
4407 static void ata_host_init(struct ata_port
*ap
, struct Scsi_Host
*host
,
4408 struct ata_host_set
*host_set
,
4409 const struct ata_probe_ent
*ent
, unsigned int port_no
)
4415 host
->max_channel
= 1;
4416 host
->unique_id
= ata_unique_id
++;
4417 host
->max_cmd_len
= 12;
4419 ap
->flags
= ATA_FLAG_PORT_DISABLED
;
4420 ap
->id
= host
->unique_id
;
4422 ap
->ctl
= ATA_DEVCTL_OBS
;
4423 ap
->host_set
= host_set
;
4424 ap
->port_no
= port_no
;
4426 ent
->legacy_mode
? ent
->hard_port_no
: port_no
;
4427 ap
->pio_mask
= ent
->pio_mask
;
4428 ap
->mwdma_mask
= ent
->mwdma_mask
;
4429 ap
->udma_mask
= ent
->udma_mask
;
4430 ap
->flags
|= ent
->host_flags
;
4431 ap
->ops
= ent
->port_ops
;
4432 ap
->cbl
= ATA_CBL_NONE
;
4433 ap
->active_tag
= ATA_TAG_POISON
;
4434 ap
->last_ctl
= 0xFF;
4436 INIT_WORK(&ap
->port_task
, NULL
, NULL
);
4437 INIT_LIST_HEAD(&ap
->eh_done_q
);
4439 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
4440 ap
->device
[i
].devno
= i
;
4443 ap
->stats
.unhandled_irq
= 1;
4444 ap
->stats
.idle_irq
= 1;
4447 memcpy(&ap
->ioaddr
, &ent
->port
[port_no
], sizeof(struct ata_ioports
));
4451 * ata_host_add - Attach low-level ATA driver to system
4452 * @ent: Information provided by low-level driver
4453 * @host_set: Collections of ports to which we add
4454 * @port_no: Port number associated with this host
4456 * Attach low-level ATA driver to system.
4459 * PCI/etc. bus probe sem.
4462 * New ata_port on success, for NULL on error.
4465 static struct ata_port
* ata_host_add(const struct ata_probe_ent
*ent
,
4466 struct ata_host_set
*host_set
,
4467 unsigned int port_no
)
4469 struct Scsi_Host
*host
;
4470 struct ata_port
*ap
;
4474 host
= scsi_host_alloc(ent
->sht
, sizeof(struct ata_port
));
4478 host
->transportt
= &ata_scsi_transport_template
;
4480 ap
= (struct ata_port
*) &host
->hostdata
[0];
4482 ata_host_init(ap
, host
, host_set
, ent
, port_no
);
4484 rc
= ap
->ops
->port_start(ap
);
4491 scsi_host_put(host
);
4496 * ata_device_add - Register hardware device with ATA and SCSI layers
4497 * @ent: Probe information describing hardware device to be registered
4499 * This function processes the information provided in the probe
4500 * information struct @ent, allocates the necessary ATA and SCSI
4501 * host information structures, initializes them, and registers
4502 * everything with requisite kernel subsystems.
4504 * This function requests irqs, probes the ATA bus, and probes
4508 * PCI/etc. bus probe sem.
4511 * Number of ports registered. Zero on error (no ports registered).
4514 int ata_device_add(const struct ata_probe_ent
*ent
)
4516 unsigned int count
= 0, i
;
4517 struct device
*dev
= ent
->dev
;
4518 struct ata_host_set
*host_set
;
4521 /* alloc a container for our list of ATA ports (buses) */
4522 host_set
= kzalloc(sizeof(struct ata_host_set
) +
4523 (ent
->n_ports
* sizeof(void *)), GFP_KERNEL
);
4526 spin_lock_init(&host_set
->lock
);
4528 host_set
->dev
= dev
;
4529 host_set
->n_ports
= ent
->n_ports
;
4530 host_set
->irq
= ent
->irq
;
4531 host_set
->mmio_base
= ent
->mmio_base
;
4532 host_set
->private_data
= ent
->private_data
;
4533 host_set
->ops
= ent
->port_ops
;
4535 /* register each port bound to this device */
4536 for (i
= 0; i
< ent
->n_ports
; i
++) {
4537 struct ata_port
*ap
;
4538 unsigned long xfer_mode_mask
;
4540 ap
= ata_host_add(ent
, host_set
, i
);
4544 host_set
->ports
[i
] = ap
;
4545 xfer_mode_mask
=(ap
->udma_mask
<< ATA_SHIFT_UDMA
) |
4546 (ap
->mwdma_mask
<< ATA_SHIFT_MWDMA
) |
4547 (ap
->pio_mask
<< ATA_SHIFT_PIO
);
4549 /* print per-port info to dmesg */
4550 printk(KERN_INFO
"ata%u: %cATA max %s cmd 0x%lX ctl 0x%lX "
4551 "bmdma 0x%lX irq %lu\n",
4553 ap
->flags
& ATA_FLAG_SATA
? 'S' : 'P',
4554 ata_mode_string(xfer_mode_mask
),
4555 ap
->ioaddr
.cmd_addr
,
4556 ap
->ioaddr
.ctl_addr
,
4557 ap
->ioaddr
.bmdma_addr
,
4561 host_set
->ops
->irq_clear(ap
);
4568 /* obtain irq, that is shared between channels */
4569 if (request_irq(ent
->irq
, ent
->port_ops
->irq_handler
, ent
->irq_flags
,
4570 DRV_NAME
, host_set
))
4573 /* perform each probe synchronously */
4574 DPRINTK("probe begin\n");
4575 for (i
= 0; i
< count
; i
++) {
4576 struct ata_port
*ap
;
4579 ap
= host_set
->ports
[i
];
4581 DPRINTK("ata%u: bus probe begin\n", ap
->id
);
4582 rc
= ata_bus_probe(ap
);
4583 DPRINTK("ata%u: bus probe end\n", ap
->id
);
4586 /* FIXME: do something useful here?
4587 * Current libata behavior will
4588 * tear down everything when
4589 * the module is removed
4590 * or the h/w is unplugged.
4594 rc
= scsi_add_host(ap
->host
, dev
);
4596 printk(KERN_ERR
"ata%u: scsi_add_host failed\n",
4598 /* FIXME: do something useful here */
4599 /* FIXME: handle unconditional calls to
4600 * scsi_scan_host and ata_host_remove, below,
4606 /* probes are done, now scan each port's disk(s) */
4607 DPRINTK("host probe begin\n");
4608 for (i
= 0; i
< count
; i
++) {
4609 struct ata_port
*ap
= host_set
->ports
[i
];
4611 ata_scsi_scan_host(ap
);
4614 dev_set_drvdata(dev
, host_set
);
4616 VPRINTK("EXIT, returning %u\n", ent
->n_ports
);
4617 return ent
->n_ports
; /* success */
4620 for (i
= 0; i
< count
; i
++) {
4621 ata_host_remove(host_set
->ports
[i
], 1);
4622 scsi_host_put(host_set
->ports
[i
]->host
);
4626 VPRINTK("EXIT, returning 0\n");
4631 * ata_host_set_remove - PCI layer callback for device removal
4632 * @host_set: ATA host set that was removed
4634 * Unregister all objects associated with this host set. Free those
4638 * Inherited from calling layer (may sleep).
4641 void ata_host_set_remove(struct ata_host_set
*host_set
)
4643 struct ata_port
*ap
;
4646 for (i
= 0; i
< host_set
->n_ports
; i
++) {
4647 ap
= host_set
->ports
[i
];
4648 scsi_remove_host(ap
->host
);
4651 free_irq(host_set
->irq
, host_set
);
4653 for (i
= 0; i
< host_set
->n_ports
; i
++) {
4654 ap
= host_set
->ports
[i
];
4656 ata_scsi_release(ap
->host
);
4658 if ((ap
->flags
& ATA_FLAG_NO_LEGACY
) == 0) {
4659 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
4661 if (ioaddr
->cmd_addr
== 0x1f0)
4662 release_region(0x1f0, 8);
4663 else if (ioaddr
->cmd_addr
== 0x170)
4664 release_region(0x170, 8);
4667 scsi_host_put(ap
->host
);
4670 if (host_set
->ops
->host_stop
)
4671 host_set
->ops
->host_stop(host_set
);
4677 * ata_scsi_release - SCSI layer callback hook for host unload
4678 * @host: libata host to be unloaded
4680 * Performs all duties necessary to shut down a libata port...
4681 * Kill port kthread, disable port, and release resources.
4684 * Inherited from SCSI layer.
4690 int ata_scsi_release(struct Scsi_Host
*host
)
4692 struct ata_port
*ap
= (struct ata_port
*) &host
->hostdata
[0];
4697 ap
->ops
->port_disable(ap
);
4698 ata_host_remove(ap
, 0);
4699 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
4700 kfree(ap
->device
[i
].id
);
4707 * ata_std_ports - initialize ioaddr with standard port offsets.
4708 * @ioaddr: IO address structure to be initialized
4710 * Utility function which initializes data_addr, error_addr,
4711 * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr,
4712 * device_addr, status_addr, and command_addr to standard offsets
4713 * relative to cmd_addr.
4715 * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr.
4718 void ata_std_ports(struct ata_ioports
*ioaddr
)
4720 ioaddr
->data_addr
= ioaddr
->cmd_addr
+ ATA_REG_DATA
;
4721 ioaddr
->error_addr
= ioaddr
->cmd_addr
+ ATA_REG_ERR
;
4722 ioaddr
->feature_addr
= ioaddr
->cmd_addr
+ ATA_REG_FEATURE
;
4723 ioaddr
->nsect_addr
= ioaddr
->cmd_addr
+ ATA_REG_NSECT
;
4724 ioaddr
->lbal_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAL
;
4725 ioaddr
->lbam_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAM
;
4726 ioaddr
->lbah_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAH
;
4727 ioaddr
->device_addr
= ioaddr
->cmd_addr
+ ATA_REG_DEVICE
;
4728 ioaddr
->status_addr
= ioaddr
->cmd_addr
+ ATA_REG_STATUS
;
4729 ioaddr
->command_addr
= ioaddr
->cmd_addr
+ ATA_REG_CMD
;
4735 void ata_pci_host_stop (struct ata_host_set
*host_set
)
4737 struct pci_dev
*pdev
= to_pci_dev(host_set
->dev
);
4739 pci_iounmap(pdev
, host_set
->mmio_base
);
4743 * ata_pci_remove_one - PCI layer callback for device removal
4744 * @pdev: PCI device that was removed
4746 * PCI layer indicates to libata via this hook that
4747 * hot-unplug or module unload event has occurred.
4748 * Handle this by unregistering all objects associated
4749 * with this PCI device. Free those objects. Then finally
4750 * release PCI resources and disable device.
4753 * Inherited from PCI layer (may sleep).
4756 void ata_pci_remove_one (struct pci_dev
*pdev
)
4758 struct device
*dev
= pci_dev_to_dev(pdev
);
4759 struct ata_host_set
*host_set
= dev_get_drvdata(dev
);
4761 ata_host_set_remove(host_set
);
4762 pci_release_regions(pdev
);
4763 pci_disable_device(pdev
);
4764 dev_set_drvdata(dev
, NULL
);
4767 /* move to PCI subsystem */
4768 int pci_test_config_bits(struct pci_dev
*pdev
, const struct pci_bits
*bits
)
4770 unsigned long tmp
= 0;
4772 switch (bits
->width
) {
4775 pci_read_config_byte(pdev
, bits
->reg
, &tmp8
);
4781 pci_read_config_word(pdev
, bits
->reg
, &tmp16
);
4787 pci_read_config_dword(pdev
, bits
->reg
, &tmp32
);
4798 return (tmp
== bits
->val
) ? 1 : 0;
4801 int ata_pci_device_suspend(struct pci_dev
*pdev
, pm_message_t state
)
4803 pci_save_state(pdev
);
4804 pci_disable_device(pdev
);
4805 pci_set_power_state(pdev
, PCI_D3hot
);
4809 int ata_pci_device_resume(struct pci_dev
*pdev
)
4811 pci_set_power_state(pdev
, PCI_D0
);
4812 pci_restore_state(pdev
);
4813 pci_enable_device(pdev
);
4814 pci_set_master(pdev
);
4817 #endif /* CONFIG_PCI */
4820 static int __init
ata_init(void)
4822 ata_wq
= create_workqueue("ata");
4826 printk(KERN_DEBUG
"libata version " DRV_VERSION
" loaded.\n");
4830 static void __exit
ata_exit(void)
4832 destroy_workqueue(ata_wq
);
4835 module_init(ata_init
);
4836 module_exit(ata_exit
);
4838 static unsigned long ratelimit_time
;
4839 static spinlock_t ata_ratelimit_lock
= SPIN_LOCK_UNLOCKED
;
4841 int ata_ratelimit(void)
4844 unsigned long flags
;
4846 spin_lock_irqsave(&ata_ratelimit_lock
, flags
);
4848 if (time_after(jiffies
, ratelimit_time
)) {
4850 ratelimit_time
= jiffies
+ (HZ
/5);
4854 spin_unlock_irqrestore(&ata_ratelimit_lock
, flags
);
4860 * libata is essentially a library of internal helper functions for
4861 * low-level ATA host controller drivers. As such, the API/ABI is
4862 * likely to change as new drivers are added and updated.
4863 * Do not depend on ABI/API stability.
4866 EXPORT_SYMBOL_GPL(ata_std_bios_param
);
4867 EXPORT_SYMBOL_GPL(ata_std_ports
);
4868 EXPORT_SYMBOL_GPL(ata_device_add
);
4869 EXPORT_SYMBOL_GPL(ata_host_set_remove
);
4870 EXPORT_SYMBOL_GPL(ata_sg_init
);
4871 EXPORT_SYMBOL_GPL(ata_sg_init_one
);
4872 EXPORT_SYMBOL_GPL(__ata_qc_complete
);
4873 EXPORT_SYMBOL_GPL(ata_qc_issue_prot
);
4874 EXPORT_SYMBOL_GPL(ata_eng_timeout
);
4875 EXPORT_SYMBOL_GPL(ata_tf_load
);
4876 EXPORT_SYMBOL_GPL(ata_tf_read
);
4877 EXPORT_SYMBOL_GPL(ata_noop_dev_select
);
4878 EXPORT_SYMBOL_GPL(ata_std_dev_select
);
4879 EXPORT_SYMBOL_GPL(ata_tf_to_fis
);
4880 EXPORT_SYMBOL_GPL(ata_tf_from_fis
);
4881 EXPORT_SYMBOL_GPL(ata_check_status
);
4882 EXPORT_SYMBOL_GPL(ata_altstatus
);
4883 EXPORT_SYMBOL_GPL(ata_exec_command
);
4884 EXPORT_SYMBOL_GPL(ata_port_start
);
4885 EXPORT_SYMBOL_GPL(ata_port_stop
);
4886 EXPORT_SYMBOL_GPL(ata_host_stop
);
4887 EXPORT_SYMBOL_GPL(ata_interrupt
);
4888 EXPORT_SYMBOL_GPL(ata_qc_prep
);
4889 EXPORT_SYMBOL_GPL(ata_noop_qc_prep
);
4890 EXPORT_SYMBOL_GPL(ata_bmdma_setup
);
4891 EXPORT_SYMBOL_GPL(ata_bmdma_start
);
4892 EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear
);
4893 EXPORT_SYMBOL_GPL(ata_bmdma_status
);
4894 EXPORT_SYMBOL_GPL(ata_bmdma_stop
);
4895 EXPORT_SYMBOL_GPL(ata_port_probe
);
4896 EXPORT_SYMBOL_GPL(sata_phy_reset
);
4897 EXPORT_SYMBOL_GPL(__sata_phy_reset
);
4898 EXPORT_SYMBOL_GPL(ata_bus_reset
);
4899 EXPORT_SYMBOL_GPL(ata_std_probeinit
);
4900 EXPORT_SYMBOL_GPL(ata_std_softreset
);
4901 EXPORT_SYMBOL_GPL(sata_std_hardreset
);
4902 EXPORT_SYMBOL_GPL(ata_std_postreset
);
4903 EXPORT_SYMBOL_GPL(ata_std_probe_reset
);
4904 EXPORT_SYMBOL_GPL(ata_drive_probe_reset
);
4905 EXPORT_SYMBOL_GPL(ata_dev_revalidate
);
4906 EXPORT_SYMBOL_GPL(ata_port_disable
);
4907 EXPORT_SYMBOL_GPL(ata_ratelimit
);
4908 EXPORT_SYMBOL_GPL(ata_busy_sleep
);
4909 EXPORT_SYMBOL_GPL(ata_port_queue_task
);
4910 EXPORT_SYMBOL_GPL(ata_scsi_ioctl
);
4911 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd
);
4912 EXPORT_SYMBOL_GPL(ata_scsi_error
);
4913 EXPORT_SYMBOL_GPL(ata_scsi_slave_config
);
4914 EXPORT_SYMBOL_GPL(ata_scsi_release
);
4915 EXPORT_SYMBOL_GPL(ata_host_intr
);
4916 EXPORT_SYMBOL_GPL(ata_dev_classify
);
4917 EXPORT_SYMBOL_GPL(ata_id_string
);
4918 EXPORT_SYMBOL_GPL(ata_id_c_string
);
4919 EXPORT_SYMBOL_GPL(ata_scsi_simulate
);
4920 EXPORT_SYMBOL_GPL(ata_eh_qc_complete
);
4921 EXPORT_SYMBOL_GPL(ata_eh_qc_retry
);
4923 EXPORT_SYMBOL_GPL(ata_pio_need_iordy
);
4924 EXPORT_SYMBOL_GPL(ata_timing_compute
);
4925 EXPORT_SYMBOL_GPL(ata_timing_merge
);
4928 EXPORT_SYMBOL_GPL(pci_test_config_bits
);
4929 EXPORT_SYMBOL_GPL(ata_pci_host_stop
);
4930 EXPORT_SYMBOL_GPL(ata_pci_init_native_mode
);
4931 EXPORT_SYMBOL_GPL(ata_pci_init_one
);
4932 EXPORT_SYMBOL_GPL(ata_pci_remove_one
);
4933 EXPORT_SYMBOL_GPL(ata_pci_device_suspend
);
4934 EXPORT_SYMBOL_GPL(ata_pci_device_resume
);
4935 EXPORT_SYMBOL_GPL(ata_pci_default_filter
);
4936 EXPORT_SYMBOL_GPL(ata_pci_clear_simplex
);
4937 #endif /* CONFIG_PCI */
4939 EXPORT_SYMBOL_GPL(ata_device_suspend
);
4940 EXPORT_SYMBOL_GPL(ata_device_resume
);
4941 EXPORT_SYMBOL_GPL(ata_scsi_device_suspend
);
4942 EXPORT_SYMBOL_GPL(ata_scsi_device_resume
);