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
,
68 static void ata_set_mode(struct ata_port
*ap
);
69 static unsigned int ata_dev_set_xfermode(struct ata_port
*ap
,
70 struct ata_device
*dev
);
71 static void ata_dev_xfermask(struct ata_port
*ap
, struct ata_device
*dev
);
73 static unsigned int ata_unique_id
= 1;
74 static struct workqueue_struct
*ata_wq
;
76 int atapi_enabled
= 1;
77 module_param(atapi_enabled
, int, 0444);
78 MODULE_PARM_DESC(atapi_enabled
, "Enable discovery of ATAPI devices (0=off, 1=on)");
81 module_param_named(fua
, libata_fua
, int, 0444);
82 MODULE_PARM_DESC(fua
, "FUA support (0=off, 1=on)");
84 MODULE_AUTHOR("Jeff Garzik");
85 MODULE_DESCRIPTION("Library module for ATA devices");
86 MODULE_LICENSE("GPL");
87 MODULE_VERSION(DRV_VERSION
);
91 * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure
92 * @tf: Taskfile to convert
93 * @fis: Buffer into which data will output
94 * @pmp: Port multiplier port
96 * Converts a standard ATA taskfile to a Serial ATA
97 * FIS structure (Register - Host to Device).
100 * Inherited from caller.
103 void ata_tf_to_fis(const struct ata_taskfile
*tf
, u8
*fis
, u8 pmp
)
105 fis
[0] = 0x27; /* Register - Host to Device FIS */
106 fis
[1] = (pmp
& 0xf) | (1 << 7); /* Port multiplier number,
107 bit 7 indicates Command FIS */
108 fis
[2] = tf
->command
;
109 fis
[3] = tf
->feature
;
116 fis
[8] = tf
->hob_lbal
;
117 fis
[9] = tf
->hob_lbam
;
118 fis
[10] = tf
->hob_lbah
;
119 fis
[11] = tf
->hob_feature
;
122 fis
[13] = tf
->hob_nsect
;
133 * ata_tf_from_fis - Convert SATA FIS to ATA taskfile
134 * @fis: Buffer from which data will be input
135 * @tf: Taskfile to output
137 * Converts a serial ATA FIS structure to a standard ATA taskfile.
140 * Inherited from caller.
143 void ata_tf_from_fis(const u8
*fis
, struct ata_taskfile
*tf
)
145 tf
->command
= fis
[2]; /* status */
146 tf
->feature
= fis
[3]; /* error */
153 tf
->hob_lbal
= fis
[8];
154 tf
->hob_lbam
= fis
[9];
155 tf
->hob_lbah
= fis
[10];
158 tf
->hob_nsect
= fis
[13];
161 static const u8 ata_rw_cmds
[] = {
165 ATA_CMD_READ_MULTI_EXT
,
166 ATA_CMD_WRITE_MULTI_EXT
,
170 ATA_CMD_WRITE_MULTI_FUA_EXT
,
174 ATA_CMD_PIO_READ_EXT
,
175 ATA_CMD_PIO_WRITE_EXT
,
188 ATA_CMD_WRITE_FUA_EXT
192 * ata_rwcmd_protocol - set taskfile r/w commands and protocol
193 * @qc: command to examine and configure
195 * Examine the device configuration and tf->flags to calculate
196 * the proper read/write commands and protocol to use.
201 int ata_rwcmd_protocol(struct ata_queued_cmd
*qc
)
203 struct ata_taskfile
*tf
= &qc
->tf
;
204 struct ata_device
*dev
= qc
->dev
;
207 int index
, fua
, lba48
, write
;
209 fua
= (tf
->flags
& ATA_TFLAG_FUA
) ? 4 : 0;
210 lba48
= (tf
->flags
& ATA_TFLAG_LBA48
) ? 2 : 0;
211 write
= (tf
->flags
& ATA_TFLAG_WRITE
) ? 1 : 0;
213 if (dev
->flags
& ATA_DFLAG_PIO
) {
214 tf
->protocol
= ATA_PROT_PIO
;
215 index
= dev
->multi_count
? 0 : 8;
216 } else if (lba48
&& (qc
->ap
->flags
& ATA_FLAG_PIO_LBA48
)) {
217 /* Unable to use DMA due to host limitation */
218 tf
->protocol
= ATA_PROT_PIO
;
219 index
= dev
->multi_count
? 0 : 8;
221 tf
->protocol
= ATA_PROT_DMA
;
225 cmd
= ata_rw_cmds
[index
+ fua
+ lba48
+ write
];
234 * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask
235 * @pio_mask: pio_mask
236 * @mwdma_mask: mwdma_mask
237 * @udma_mask: udma_mask
239 * Pack @pio_mask, @mwdma_mask and @udma_mask into a single
240 * unsigned int xfer_mask.
248 static unsigned int ata_pack_xfermask(unsigned int pio_mask
,
249 unsigned int mwdma_mask
,
250 unsigned int udma_mask
)
252 return ((pio_mask
<< ATA_SHIFT_PIO
) & ATA_MASK_PIO
) |
253 ((mwdma_mask
<< ATA_SHIFT_MWDMA
) & ATA_MASK_MWDMA
) |
254 ((udma_mask
<< ATA_SHIFT_UDMA
) & ATA_MASK_UDMA
);
258 * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks
259 * @xfer_mask: xfer_mask to unpack
260 * @pio_mask: resulting pio_mask
261 * @mwdma_mask: resulting mwdma_mask
262 * @udma_mask: resulting udma_mask
264 * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask.
265 * Any NULL distination masks will be ignored.
267 static void ata_unpack_xfermask(unsigned int xfer_mask
,
268 unsigned int *pio_mask
,
269 unsigned int *mwdma_mask
,
270 unsigned int *udma_mask
)
273 *pio_mask
= (xfer_mask
& ATA_MASK_PIO
) >> ATA_SHIFT_PIO
;
275 *mwdma_mask
= (xfer_mask
& ATA_MASK_MWDMA
) >> ATA_SHIFT_MWDMA
;
277 *udma_mask
= (xfer_mask
& ATA_MASK_UDMA
) >> ATA_SHIFT_UDMA
;
280 static const struct ata_xfer_ent
{
281 unsigned int shift
, bits
;
284 { ATA_SHIFT_PIO
, ATA_BITS_PIO
, XFER_PIO_0
},
285 { ATA_SHIFT_MWDMA
, ATA_BITS_MWDMA
, XFER_MW_DMA_0
},
286 { ATA_SHIFT_UDMA
, ATA_BITS_UDMA
, XFER_UDMA_0
},
291 * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask
292 * @xfer_mask: xfer_mask of interest
294 * Return matching XFER_* value for @xfer_mask. Only the highest
295 * bit of @xfer_mask is considered.
301 * Matching XFER_* value, 0 if no match found.
303 static u8
ata_xfer_mask2mode(unsigned int xfer_mask
)
305 int highbit
= fls(xfer_mask
) - 1;
306 const struct ata_xfer_ent
*ent
;
308 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
309 if (highbit
>= ent
->shift
&& highbit
< ent
->shift
+ ent
->bits
)
310 return ent
->base
+ highbit
- ent
->shift
;
315 * ata_xfer_mode2mask - Find matching xfer_mask for XFER_*
316 * @xfer_mode: XFER_* of interest
318 * Return matching xfer_mask for @xfer_mode.
324 * Matching xfer_mask, 0 if no match found.
326 static unsigned int ata_xfer_mode2mask(u8 xfer_mode
)
328 const struct ata_xfer_ent
*ent
;
330 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
331 if (xfer_mode
>= ent
->base
&& xfer_mode
< ent
->base
+ ent
->bits
)
332 return 1 << (ent
->shift
+ xfer_mode
- ent
->base
);
337 * ata_xfer_mode2shift - Find matching xfer_shift for XFER_*
338 * @xfer_mode: XFER_* of interest
340 * Return matching xfer_shift for @xfer_mode.
346 * Matching xfer_shift, -1 if no match found.
348 static int ata_xfer_mode2shift(unsigned int xfer_mode
)
350 const struct ata_xfer_ent
*ent
;
352 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
353 if (xfer_mode
>= ent
->base
&& xfer_mode
< ent
->base
+ ent
->bits
)
359 * ata_mode_string - convert xfer_mask to string
360 * @xfer_mask: mask of bits supported; only highest bit counts.
362 * Determine string which represents the highest speed
363 * (highest bit in @modemask).
369 * Constant C string representing highest speed listed in
370 * @mode_mask, or the constant C string "<n/a>".
372 static const char *ata_mode_string(unsigned int xfer_mask
)
374 static const char * const xfer_mode_str
[] = {
394 highbit
= fls(xfer_mask
) - 1;
395 if (highbit
>= 0 && highbit
< ARRAY_SIZE(xfer_mode_str
))
396 return xfer_mode_str
[highbit
];
400 static void ata_dev_disable(struct ata_port
*ap
, struct ata_device
*dev
)
402 if (ata_dev_present(dev
)) {
403 printk(KERN_WARNING
"ata%u: dev %u disabled\n",
410 * ata_pio_devchk - PATA device presence detection
411 * @ap: ATA channel to examine
412 * @device: Device to examine (starting at zero)
414 * This technique was originally described in
415 * Hale Landis's ATADRVR (www.ata-atapi.com), and
416 * later found its way into the ATA/ATAPI spec.
418 * Write a pattern to the ATA shadow registers,
419 * and if a device is present, it will respond by
420 * correctly storing and echoing back the
421 * ATA shadow register contents.
427 static unsigned int ata_pio_devchk(struct ata_port
*ap
,
430 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
433 ap
->ops
->dev_select(ap
, device
);
435 outb(0x55, ioaddr
->nsect_addr
);
436 outb(0xaa, ioaddr
->lbal_addr
);
438 outb(0xaa, ioaddr
->nsect_addr
);
439 outb(0x55, ioaddr
->lbal_addr
);
441 outb(0x55, ioaddr
->nsect_addr
);
442 outb(0xaa, ioaddr
->lbal_addr
);
444 nsect
= inb(ioaddr
->nsect_addr
);
445 lbal
= inb(ioaddr
->lbal_addr
);
447 if ((nsect
== 0x55) && (lbal
== 0xaa))
448 return 1; /* we found a device */
450 return 0; /* nothing found */
454 * ata_mmio_devchk - PATA device presence detection
455 * @ap: ATA channel to examine
456 * @device: Device to examine (starting at zero)
458 * This technique was originally described in
459 * Hale Landis's ATADRVR (www.ata-atapi.com), and
460 * later found its way into the ATA/ATAPI spec.
462 * Write a pattern to the ATA shadow registers,
463 * and if a device is present, it will respond by
464 * correctly storing and echoing back the
465 * ATA shadow register contents.
471 static unsigned int ata_mmio_devchk(struct ata_port
*ap
,
474 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
477 ap
->ops
->dev_select(ap
, device
);
479 writeb(0x55, (void __iomem
*) ioaddr
->nsect_addr
);
480 writeb(0xaa, (void __iomem
*) ioaddr
->lbal_addr
);
482 writeb(0xaa, (void __iomem
*) ioaddr
->nsect_addr
);
483 writeb(0x55, (void __iomem
*) ioaddr
->lbal_addr
);
485 writeb(0x55, (void __iomem
*) ioaddr
->nsect_addr
);
486 writeb(0xaa, (void __iomem
*) ioaddr
->lbal_addr
);
488 nsect
= readb((void __iomem
*) ioaddr
->nsect_addr
);
489 lbal
= readb((void __iomem
*) ioaddr
->lbal_addr
);
491 if ((nsect
== 0x55) && (lbal
== 0xaa))
492 return 1; /* we found a device */
494 return 0; /* nothing found */
498 * ata_devchk - PATA device presence detection
499 * @ap: ATA channel to examine
500 * @device: Device to examine (starting at zero)
502 * Dispatch ATA device presence detection, depending
503 * on whether we are using PIO or MMIO to talk to the
504 * ATA shadow registers.
510 static unsigned int ata_devchk(struct ata_port
*ap
,
513 if (ap
->flags
& ATA_FLAG_MMIO
)
514 return ata_mmio_devchk(ap
, device
);
515 return ata_pio_devchk(ap
, device
);
519 * ata_dev_classify - determine device type based on ATA-spec signature
520 * @tf: ATA taskfile register set for device to be identified
522 * Determine from taskfile register contents whether a device is
523 * ATA or ATAPI, as per "Signature and persistence" section
524 * of ATA/PI spec (volume 1, sect 5.14).
530 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, or %ATA_DEV_UNKNOWN
531 * the event of failure.
534 unsigned int ata_dev_classify(const struct ata_taskfile
*tf
)
536 /* Apple's open source Darwin code hints that some devices only
537 * put a proper signature into the LBA mid/high registers,
538 * So, we only check those. It's sufficient for uniqueness.
541 if (((tf
->lbam
== 0) && (tf
->lbah
== 0)) ||
542 ((tf
->lbam
== 0x3c) && (tf
->lbah
== 0xc3))) {
543 DPRINTK("found ATA device by sig\n");
547 if (((tf
->lbam
== 0x14) && (tf
->lbah
== 0xeb)) ||
548 ((tf
->lbam
== 0x69) && (tf
->lbah
== 0x96))) {
549 DPRINTK("found ATAPI device by sig\n");
550 return ATA_DEV_ATAPI
;
553 DPRINTK("unknown device\n");
554 return ATA_DEV_UNKNOWN
;
558 * ata_dev_try_classify - Parse returned ATA device signature
559 * @ap: ATA channel to examine
560 * @device: Device to examine (starting at zero)
561 * @r_err: Value of error register on completion
563 * After an event -- SRST, E.D.D., or SATA COMRESET -- occurs,
564 * an ATA/ATAPI-defined set of values is placed in the ATA
565 * shadow registers, indicating the results of device detection
568 * Select the ATA device, and read the values from the ATA shadow
569 * registers. Then parse according to the Error register value,
570 * and the spec-defined values examined by ata_dev_classify().
576 * Device type - %ATA_DEV_ATA, %ATA_DEV_ATAPI or %ATA_DEV_NONE.
580 ata_dev_try_classify(struct ata_port
*ap
, unsigned int device
, u8
*r_err
)
582 struct ata_taskfile tf
;
586 ap
->ops
->dev_select(ap
, device
);
588 memset(&tf
, 0, sizeof(tf
));
590 ap
->ops
->tf_read(ap
, &tf
);
595 /* see if device passed diags */
598 else if ((device
== 0) && (err
== 0x81))
603 /* determine if device is ATA or ATAPI */
604 class = ata_dev_classify(&tf
);
606 if (class == ATA_DEV_UNKNOWN
)
608 if ((class == ATA_DEV_ATA
) && (ata_chk_status(ap
) == 0))
614 * ata_id_string - Convert IDENTIFY DEVICE page into string
615 * @id: IDENTIFY DEVICE results we will examine
616 * @s: string into which data is output
617 * @ofs: offset into identify device page
618 * @len: length of string to return. must be an even number.
620 * The strings in the IDENTIFY DEVICE page are broken up into
621 * 16-bit chunks. Run through the string, and output each
622 * 8-bit chunk linearly, regardless of platform.
628 void ata_id_string(const u16
*id
, unsigned char *s
,
629 unsigned int ofs
, unsigned int len
)
648 * ata_id_c_string - Convert IDENTIFY DEVICE page into C string
649 * @id: IDENTIFY DEVICE results we will examine
650 * @s: string into which data is output
651 * @ofs: offset into identify device page
652 * @len: length of string to return. must be an odd number.
654 * This function is identical to ata_id_string except that it
655 * trims trailing spaces and terminates the resulting string with
656 * null. @len must be actual maximum length (even number) + 1.
661 void ata_id_c_string(const u16
*id
, unsigned char *s
,
662 unsigned int ofs
, unsigned int len
)
668 ata_id_string(id
, s
, ofs
, len
- 1);
670 p
= s
+ strnlen(s
, len
- 1);
671 while (p
> s
&& p
[-1] == ' ')
676 static u64
ata_id_n_sectors(const u16
*id
)
678 if (ata_id_has_lba(id
)) {
679 if (ata_id_has_lba48(id
))
680 return ata_id_u64(id
, 100);
682 return ata_id_u32(id
, 60);
684 if (ata_id_current_chs_valid(id
))
685 return ata_id_u32(id
, 57);
687 return id
[1] * id
[3] * id
[6];
692 * ata_noop_dev_select - Select device 0/1 on ATA bus
693 * @ap: ATA channel to manipulate
694 * @device: ATA device (numbered from zero) to select
696 * This function performs no actual function.
698 * May be used as the dev_select() entry in ata_port_operations.
703 void ata_noop_dev_select (struct ata_port
*ap
, unsigned int device
)
709 * ata_std_dev_select - Select device 0/1 on ATA bus
710 * @ap: ATA channel to manipulate
711 * @device: ATA device (numbered from zero) to select
713 * Use the method defined in the ATA specification to
714 * make either device 0, or device 1, active on the
715 * ATA channel. Works with both PIO and MMIO.
717 * May be used as the dev_select() entry in ata_port_operations.
723 void ata_std_dev_select (struct ata_port
*ap
, unsigned int device
)
728 tmp
= ATA_DEVICE_OBS
;
730 tmp
= ATA_DEVICE_OBS
| ATA_DEV1
;
732 if (ap
->flags
& ATA_FLAG_MMIO
) {
733 writeb(tmp
, (void __iomem
*) ap
->ioaddr
.device_addr
);
735 outb(tmp
, ap
->ioaddr
.device_addr
);
737 ata_pause(ap
); /* needed; also flushes, for mmio */
741 * ata_dev_select - Select device 0/1 on ATA bus
742 * @ap: ATA channel to manipulate
743 * @device: ATA device (numbered from zero) to select
744 * @wait: non-zero to wait for Status register BSY bit to clear
745 * @can_sleep: non-zero if context allows sleeping
747 * Use the method defined in the ATA specification to
748 * make either device 0, or device 1, active on the
751 * This is a high-level version of ata_std_dev_select(),
752 * which additionally provides the services of inserting
753 * the proper pauses and status polling, where needed.
759 void ata_dev_select(struct ata_port
*ap
, unsigned int device
,
760 unsigned int wait
, unsigned int can_sleep
)
762 VPRINTK("ENTER, ata%u: device %u, wait %u\n",
763 ap
->id
, device
, wait
);
768 ap
->ops
->dev_select(ap
, device
);
771 if (can_sleep
&& ap
->device
[device
].class == ATA_DEV_ATAPI
)
778 * ata_dump_id - IDENTIFY DEVICE info debugging output
779 * @id: IDENTIFY DEVICE page to dump
781 * Dump selected 16-bit words from the given IDENTIFY DEVICE
788 static inline void ata_dump_id(const u16
*id
)
790 DPRINTK("49==0x%04x "
800 DPRINTK("80==0x%04x "
810 DPRINTK("88==0x%04x "
817 * ata_id_xfermask - Compute xfermask from the given IDENTIFY data
818 * @id: IDENTIFY data to compute xfer mask from
820 * Compute the xfermask for this device. This is not as trivial
821 * as it seems if we must consider early devices correctly.
823 * FIXME: pre IDE drive timing (do we care ?).
831 static unsigned int ata_id_xfermask(const u16
*id
)
833 unsigned int pio_mask
, mwdma_mask
, udma_mask
;
835 /* Usual case. Word 53 indicates word 64 is valid */
836 if (id
[ATA_ID_FIELD_VALID
] & (1 << 1)) {
837 pio_mask
= id
[ATA_ID_PIO_MODES
] & 0x03;
841 /* If word 64 isn't valid then Word 51 high byte holds
842 * the PIO timing number for the maximum. Turn it into
845 pio_mask
= (2 << (id
[ATA_ID_OLD_PIO_MODES
] & 0xFF)) - 1 ;
847 /* But wait.. there's more. Design your standards by
848 * committee and you too can get a free iordy field to
849 * process. However its the speeds not the modes that
850 * are supported... Note drivers using the timing API
851 * will get this right anyway
855 mwdma_mask
= id
[ATA_ID_MWDMA_MODES
] & 0x07;
858 if (id
[ATA_ID_FIELD_VALID
] & (1 << 2))
859 udma_mask
= id
[ATA_ID_UDMA_MODES
] & 0xff;
861 return ata_pack_xfermask(pio_mask
, mwdma_mask
, udma_mask
);
865 * ata_port_queue_task - Queue port_task
866 * @ap: The ata_port to queue port_task for
868 * Schedule @fn(@data) for execution after @delay jiffies using
869 * port_task. There is one port_task per port and it's the
870 * user(low level driver)'s responsibility to make sure that only
871 * one task is active at any given time.
873 * libata core layer takes care of synchronization between
874 * port_task and EH. ata_port_queue_task() may be ignored for EH
878 * Inherited from caller.
880 void ata_port_queue_task(struct ata_port
*ap
, void (*fn
)(void *), void *data
,
885 if (ap
->flags
& ATA_FLAG_FLUSH_PORT_TASK
)
888 PREPARE_WORK(&ap
->port_task
, fn
, data
);
891 rc
= queue_work(ata_wq
, &ap
->port_task
);
893 rc
= queue_delayed_work(ata_wq
, &ap
->port_task
, delay
);
895 /* rc == 0 means that another user is using port task */
900 * ata_port_flush_task - Flush port_task
901 * @ap: The ata_port to flush port_task for
903 * After this function completes, port_task is guranteed not to
904 * be running or scheduled.
907 * Kernel thread context (may sleep)
909 void ata_port_flush_task(struct ata_port
*ap
)
915 spin_lock_irqsave(&ap
->host_set
->lock
, flags
);
916 ap
->flags
|= ATA_FLAG_FLUSH_PORT_TASK
;
917 spin_unlock_irqrestore(&ap
->host_set
->lock
, flags
);
919 DPRINTK("flush #1\n");
920 flush_workqueue(ata_wq
);
923 * At this point, if a task is running, it's guaranteed to see
924 * the FLUSH flag; thus, it will never queue pio tasks again.
927 if (!cancel_delayed_work(&ap
->port_task
)) {
928 DPRINTK("flush #2\n");
929 flush_workqueue(ata_wq
);
932 spin_lock_irqsave(&ap
->host_set
->lock
, flags
);
933 ap
->flags
&= ~ATA_FLAG_FLUSH_PORT_TASK
;
934 spin_unlock_irqrestore(&ap
->host_set
->lock
, flags
);
939 void ata_qc_complete_internal(struct ata_queued_cmd
*qc
)
941 struct completion
*waiting
= qc
->private_data
;
943 qc
->ap
->ops
->tf_read(qc
->ap
, &qc
->tf
);
948 * ata_exec_internal - execute libata internal command
949 * @ap: Port to which the command is sent
950 * @dev: Device to which the command is sent
951 * @tf: Taskfile registers for the command and the result
952 * @dma_dir: Data tranfer direction of the command
953 * @buf: Data buffer of the command
954 * @buflen: Length of data buffer
956 * Executes libata internal command with timeout. @tf contains
957 * command on entry and result on return. Timeout and error
958 * conditions are reported via return value. No recovery action
959 * is taken after a command times out. It's caller's duty to
960 * clean up after timeout.
963 * None. Should be called with kernel context, might sleep.
967 ata_exec_internal(struct ata_port
*ap
, struct ata_device
*dev
,
968 struct ata_taskfile
*tf
,
969 int dma_dir
, void *buf
, unsigned int buflen
)
971 u8 command
= tf
->command
;
972 struct ata_queued_cmd
*qc
;
973 DECLARE_COMPLETION(wait
);
975 unsigned int err_mask
;
977 spin_lock_irqsave(&ap
->host_set
->lock
, flags
);
979 qc
= ata_qc_new_init(ap
, dev
);
983 qc
->dma_dir
= dma_dir
;
984 if (dma_dir
!= DMA_NONE
) {
985 ata_sg_init_one(qc
, buf
, buflen
);
986 qc
->nsect
= buflen
/ ATA_SECT_SIZE
;
989 qc
->private_data
= &wait
;
990 qc
->complete_fn
= ata_qc_complete_internal
;
992 qc
->err_mask
= ata_qc_issue(qc
);
996 spin_unlock_irqrestore(&ap
->host_set
->lock
, flags
);
998 if (!wait_for_completion_timeout(&wait
, ATA_TMOUT_INTERNAL
)) {
999 ata_port_flush_task(ap
);
1001 spin_lock_irqsave(&ap
->host_set
->lock
, flags
);
1003 /* We're racing with irq here. If we lose, the
1004 * following test prevents us from completing the qc
1005 * again. If completion irq occurs after here but
1006 * before the caller cleans up, it will result in a
1007 * spurious interrupt. We can live with that.
1009 if (qc
->flags
& ATA_QCFLAG_ACTIVE
) {
1010 qc
->err_mask
= AC_ERR_TIMEOUT
;
1011 ata_qc_complete(qc
);
1012 printk(KERN_WARNING
"ata%u: qc timeout (cmd 0x%x)\n",
1016 spin_unlock_irqrestore(&ap
->host_set
->lock
, flags
);
1020 err_mask
= qc
->err_mask
;
1024 /* XXX - Some LLDDs (sata_mv) disable port on command failure.
1025 * Until those drivers are fixed, we detect the condition
1026 * here, fail the command with AC_ERR_SYSTEM and reenable the
1029 * Note that this doesn't change any behavior as internal
1030 * command failure results in disabling the device in the
1031 * higher layer for LLDDs without new reset/EH callbacks.
1033 * Kill the following code as soon as those drivers are fixed.
1035 if (ap
->flags
& ATA_FLAG_PORT_DISABLED
) {
1036 err_mask
|= AC_ERR_SYSTEM
;
1044 * ata_pio_need_iordy - check if iordy needed
1047 * Check if the current speed of the device requires IORDY. Used
1048 * by various controllers for chip configuration.
1051 unsigned int ata_pio_need_iordy(const struct ata_device
*adev
)
1054 int speed
= adev
->pio_mode
- XFER_PIO_0
;
1061 /* If we have no drive specific rule, then PIO 2 is non IORDY */
1063 if (adev
->id
[ATA_ID_FIELD_VALID
] & 2) { /* EIDE */
1064 pio
= adev
->id
[ATA_ID_EIDE_PIO
];
1065 /* Is the speed faster than the drive allows non IORDY ? */
1067 /* This is cycle times not frequency - watch the logic! */
1068 if (pio
> 240) /* PIO2 is 240nS per cycle */
1077 * ata_dev_read_id - Read ID data from the specified device
1078 * @ap: port on which target device resides
1079 * @dev: target device
1080 * @p_class: pointer to class of the target device (may be changed)
1081 * @post_reset: is this read ID post-reset?
1082 * @p_id: read IDENTIFY page (newly allocated)
1084 * Read ID data from the specified device. ATA_CMD_ID_ATA is
1085 * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
1086 * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS
1087 * for pre-ATA4 drives.
1090 * Kernel thread context (may sleep)
1093 * 0 on success, -errno otherwise.
1095 static int ata_dev_read_id(struct ata_port
*ap
, struct ata_device
*dev
,
1096 unsigned int *p_class
, int post_reset
, u16
**p_id
)
1098 unsigned int class = *p_class
;
1099 struct ata_taskfile tf
;
1100 unsigned int err_mask
= 0;
1105 DPRINTK("ENTER, host %u, dev %u\n", ap
->id
, dev
->devno
);
1107 ata_dev_select(ap
, dev
->devno
, 1, 1); /* select device 0/1 */
1109 id
= kmalloc(sizeof(id
[0]) * ATA_ID_WORDS
, GFP_KERNEL
);
1112 reason
= "out of memory";
1117 ata_tf_init(ap
, &tf
, dev
->devno
);
1121 tf
.command
= ATA_CMD_ID_ATA
;
1124 tf
.command
= ATA_CMD_ID_ATAPI
;
1128 reason
= "unsupported class";
1132 tf
.protocol
= ATA_PROT_PIO
;
1134 err_mask
= ata_exec_internal(ap
, dev
, &tf
, DMA_FROM_DEVICE
,
1135 id
, sizeof(id
[0]) * ATA_ID_WORDS
);
1138 reason
= "I/O error";
1142 swap_buf_le16(id
, ATA_ID_WORDS
);
1145 if ((class == ATA_DEV_ATA
) != (ata_id_is_ata(id
) | ata_id_is_cfa(id
))) {
1147 reason
= "device reports illegal type";
1151 if (post_reset
&& class == ATA_DEV_ATA
) {
1153 * The exact sequence expected by certain pre-ATA4 drives is:
1156 * INITIALIZE DEVICE PARAMETERS
1158 * Some drives were very specific about that exact sequence.
1160 if (ata_id_major_version(id
) < 4 || !ata_id_has_lba(id
)) {
1161 err_mask
= ata_dev_init_params(ap
, dev
, id
[3], id
[6]);
1164 reason
= "INIT_DEV_PARAMS failed";
1168 /* current CHS translation info (id[53-58]) might be
1169 * changed. reread the identify device info.
1181 printk(KERN_WARNING
"ata%u: dev %u failed to IDENTIFY (%s)\n",
1182 ap
->id
, dev
->devno
, reason
);
1187 static inline u8
ata_dev_knobble(const struct ata_port
*ap
,
1188 struct ata_device
*dev
)
1190 return ((ap
->cbl
== ATA_CBL_SATA
) && (!ata_id_is_sata(dev
->id
)));
1194 * ata_dev_configure - Configure the specified ATA/ATAPI device
1195 * @ap: Port on which target device resides
1196 * @dev: Target device to configure
1197 * @print_info: Enable device info printout
1199 * Configure @dev according to @dev->id. Generic and low-level
1200 * driver specific fixups are also applied.
1203 * Kernel thread context (may sleep)
1206 * 0 on success, -errno otherwise
1208 static int ata_dev_configure(struct ata_port
*ap
, struct ata_device
*dev
,
1211 const u16
*id
= dev
->id
;
1212 unsigned int xfer_mask
;
1215 if (!ata_dev_present(dev
)) {
1216 DPRINTK("ENTER/EXIT (host %u, dev %u) -- nodev\n",
1217 ap
->id
, dev
->devno
);
1221 DPRINTK("ENTER, host %u, dev %u\n", ap
->id
, dev
->devno
);
1223 /* print device capabilities */
1225 printk(KERN_DEBUG
"ata%u: dev %u cfg 49:%04x 82:%04x 83:%04x "
1226 "84:%04x 85:%04x 86:%04x 87:%04x 88:%04x\n",
1227 ap
->id
, dev
->devno
, id
[49], id
[82], id
[83],
1228 id
[84], id
[85], id
[86], id
[87], id
[88]);
1230 /* initialize to-be-configured parameters */
1232 dev
->max_sectors
= 0;
1240 * common ATA, ATAPI feature tests
1243 /* find max transfer mode; for printk only */
1244 xfer_mask
= ata_id_xfermask(id
);
1248 /* ATA-specific feature tests */
1249 if (dev
->class == ATA_DEV_ATA
) {
1250 dev
->n_sectors
= ata_id_n_sectors(id
);
1252 if (ata_id_has_lba(id
)) {
1253 const char *lba_desc
;
1256 dev
->flags
|= ATA_DFLAG_LBA
;
1257 if (ata_id_has_lba48(id
)) {
1258 dev
->flags
|= ATA_DFLAG_LBA48
;
1262 /* print device info to dmesg */
1264 printk(KERN_INFO
"ata%u: dev %u ATA-%d, "
1265 "max %s, %Lu sectors: %s\n",
1267 ata_id_major_version(id
),
1268 ata_mode_string(xfer_mask
),
1269 (unsigned long long)dev
->n_sectors
,
1274 /* Default translation */
1275 dev
->cylinders
= id
[1];
1277 dev
->sectors
= id
[6];
1279 if (ata_id_current_chs_valid(id
)) {
1280 /* Current CHS translation is valid. */
1281 dev
->cylinders
= id
[54];
1282 dev
->heads
= id
[55];
1283 dev
->sectors
= id
[56];
1286 /* print device info to dmesg */
1288 printk(KERN_INFO
"ata%u: dev %u ATA-%d, "
1289 "max %s, %Lu sectors: CHS %u/%u/%u\n",
1291 ata_id_major_version(id
),
1292 ata_mode_string(xfer_mask
),
1293 (unsigned long long)dev
->n_sectors
,
1294 dev
->cylinders
, dev
->heads
, dev
->sectors
);
1300 /* ATAPI-specific feature tests */
1301 else if (dev
->class == ATA_DEV_ATAPI
) {
1302 rc
= atapi_cdb_len(id
);
1303 if ((rc
< 12) || (rc
> ATAPI_CDB_LEN
)) {
1304 printk(KERN_WARNING
"ata%u: unsupported CDB len\n", ap
->id
);
1308 dev
->cdb_len
= (unsigned int) rc
;
1310 /* print device info to dmesg */
1312 printk(KERN_INFO
"ata%u: dev %u ATAPI, max %s\n",
1313 ap
->id
, dev
->devno
, ata_mode_string(xfer_mask
));
1316 ap
->host
->max_cmd_len
= 0;
1317 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
1318 ap
->host
->max_cmd_len
= max_t(unsigned int,
1319 ap
->host
->max_cmd_len
,
1320 ap
->device
[i
].cdb_len
);
1322 /* limit bridge transfers to udma5, 200 sectors */
1323 if (ata_dev_knobble(ap
, dev
)) {
1325 printk(KERN_INFO
"ata%u(%u): applying bridge limits\n",
1326 ap
->id
, dev
->devno
);
1327 dev
->udma_mask
&= ATA_UDMA5
;
1328 dev
->max_sectors
= ATA_MAX_SECTORS
;
1331 if (ap
->ops
->dev_config
)
1332 ap
->ops
->dev_config(ap
, dev
);
1334 DPRINTK("EXIT, drv_stat = 0x%x\n", ata_chk_status(ap
));
1338 DPRINTK("EXIT, err\n");
1343 * ata_bus_probe - Reset and probe ATA bus
1346 * Master ATA bus probing function. Initiates a hardware-dependent
1347 * bus reset, then attempts to identify any devices found on
1351 * PCI/etc. bus probe sem.
1354 * Zero on success, non-zero on error.
1357 static int ata_bus_probe(struct ata_port
*ap
)
1359 unsigned int classes
[ATA_MAX_DEVICES
];
1360 unsigned int i
, rc
, found
= 0;
1364 /* reset and determine device classes */
1365 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
1366 classes
[i
] = ATA_DEV_UNKNOWN
;
1368 if (ap
->ops
->probe_reset
) {
1369 rc
= ap
->ops
->probe_reset(ap
, classes
);
1371 printk("ata%u: reset failed (errno=%d)\n", ap
->id
, rc
);
1375 ap
->ops
->phy_reset(ap
);
1377 if (!(ap
->flags
& ATA_FLAG_PORT_DISABLED
))
1378 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
1379 classes
[i
] = ap
->device
[i
].class;
1384 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
1385 if (classes
[i
] == ATA_DEV_UNKNOWN
)
1386 classes
[i
] = ATA_DEV_NONE
;
1388 /* read IDENTIFY page and configure devices */
1389 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
1390 struct ata_device
*dev
= &ap
->device
[i
];
1392 dev
->class = classes
[i
];
1394 if (!ata_dev_present(dev
))
1397 WARN_ON(dev
->id
!= NULL
);
1398 if (ata_dev_read_id(ap
, dev
, &dev
->class, 1, &dev
->id
)) {
1399 dev
->class = ATA_DEV_NONE
;
1403 if (ata_dev_configure(ap
, dev
, 1)) {
1404 ata_dev_disable(ap
, dev
);
1412 goto err_out_disable
;
1414 if (ap
->ops
->set_mode
)
1415 ap
->ops
->set_mode(ap
);
1419 if (ap
->flags
& ATA_FLAG_PORT_DISABLED
)
1420 goto err_out_disable
;
1425 ap
->ops
->port_disable(ap
);
1430 * ata_port_probe - Mark port as enabled
1431 * @ap: Port for which we indicate enablement
1433 * Modify @ap data structure such that the system
1434 * thinks that the entire port is enabled.
1436 * LOCKING: host_set lock, or some other form of
1440 void ata_port_probe(struct ata_port
*ap
)
1442 ap
->flags
&= ~ATA_FLAG_PORT_DISABLED
;
1446 * sata_print_link_status - Print SATA link status
1447 * @ap: SATA port to printk link status about
1449 * This function prints link speed and status of a SATA link.
1454 static void sata_print_link_status(struct ata_port
*ap
)
1459 if (!ap
->ops
->scr_read
)
1462 sstatus
= scr_read(ap
, SCR_STATUS
);
1464 if (sata_dev_present(ap
)) {
1465 tmp
= (sstatus
>> 4) & 0xf;
1468 else if (tmp
& (1 << 1))
1471 speed
= "<unknown>";
1472 printk(KERN_INFO
"ata%u: SATA link up %s Gbps (SStatus %X)\n",
1473 ap
->id
, speed
, sstatus
);
1475 printk(KERN_INFO
"ata%u: SATA link down (SStatus %X)\n",
1481 * __sata_phy_reset - Wake/reset a low-level SATA PHY
1482 * @ap: SATA port associated with target SATA PHY.
1484 * This function issues commands to standard SATA Sxxx
1485 * PHY registers, to wake up the phy (and device), and
1486 * clear any reset condition.
1489 * PCI/etc. bus probe sem.
1492 void __sata_phy_reset(struct ata_port
*ap
)
1495 unsigned long timeout
= jiffies
+ (HZ
* 5);
1497 if (ap
->flags
& ATA_FLAG_SATA_RESET
) {
1498 /* issue phy wake/reset */
1499 scr_write_flush(ap
, SCR_CONTROL
, 0x301);
1500 /* Couldn't find anything in SATA I/II specs, but
1501 * AHCI-1.1 10.4.2 says at least 1 ms. */
1504 scr_write_flush(ap
, SCR_CONTROL
, 0x300); /* phy wake/clear reset */
1506 /* wait for phy to become ready, if necessary */
1509 sstatus
= scr_read(ap
, SCR_STATUS
);
1510 if ((sstatus
& 0xf) != 1)
1512 } while (time_before(jiffies
, timeout
));
1514 /* print link status */
1515 sata_print_link_status(ap
);
1517 /* TODO: phy layer with polling, timeouts, etc. */
1518 if (sata_dev_present(ap
))
1521 ata_port_disable(ap
);
1523 if (ap
->flags
& ATA_FLAG_PORT_DISABLED
)
1526 if (ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
)) {
1527 ata_port_disable(ap
);
1531 ap
->cbl
= ATA_CBL_SATA
;
1535 * sata_phy_reset - Reset SATA bus.
1536 * @ap: SATA port associated with target SATA PHY.
1538 * This function resets the SATA bus, and then probes
1539 * the bus for devices.
1542 * PCI/etc. bus probe sem.
1545 void sata_phy_reset(struct ata_port
*ap
)
1547 __sata_phy_reset(ap
);
1548 if (ap
->flags
& ATA_FLAG_PORT_DISABLED
)
1554 * ata_dev_pair - return other device on cable
1558 * Obtain the other device on the same cable, or if none is
1559 * present NULL is returned
1562 struct ata_device
*ata_dev_pair(struct ata_port
*ap
, struct ata_device
*adev
)
1564 struct ata_device
*pair
= &ap
->device
[1 - adev
->devno
];
1565 if (!ata_dev_present(pair
))
1571 * ata_port_disable - Disable port.
1572 * @ap: Port to be disabled.
1574 * Modify @ap data structure such that the system
1575 * thinks that the entire port is disabled, and should
1576 * never attempt to probe or communicate with devices
1579 * LOCKING: host_set lock, or some other form of
1583 void ata_port_disable(struct ata_port
*ap
)
1585 ap
->device
[0].class = ATA_DEV_NONE
;
1586 ap
->device
[1].class = ATA_DEV_NONE
;
1587 ap
->flags
|= ATA_FLAG_PORT_DISABLED
;
1591 * This mode timing computation functionality is ported over from
1592 * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik
1595 * PIO 0-5, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
1596 * These were taken from ATA/ATAPI-6 standard, rev 0a, except
1597 * for PIO 5, which is a nonstandard extension and UDMA6, which
1598 * is currently supported only by Maxtor drives.
1601 static const struct ata_timing ata_timing
[] = {
1603 { XFER_UDMA_6
, 0, 0, 0, 0, 0, 0, 0, 15 },
1604 { XFER_UDMA_5
, 0, 0, 0, 0, 0, 0, 0, 20 },
1605 { XFER_UDMA_4
, 0, 0, 0, 0, 0, 0, 0, 30 },
1606 { XFER_UDMA_3
, 0, 0, 0, 0, 0, 0, 0, 45 },
1608 { XFER_UDMA_2
, 0, 0, 0, 0, 0, 0, 0, 60 },
1609 { XFER_UDMA_1
, 0, 0, 0, 0, 0, 0, 0, 80 },
1610 { XFER_UDMA_0
, 0, 0, 0, 0, 0, 0, 0, 120 },
1612 /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */
1614 { XFER_MW_DMA_2
, 25, 0, 0, 0, 70, 25, 120, 0 },
1615 { XFER_MW_DMA_1
, 45, 0, 0, 0, 80, 50, 150, 0 },
1616 { XFER_MW_DMA_0
, 60, 0, 0, 0, 215, 215, 480, 0 },
1618 { XFER_SW_DMA_2
, 60, 0, 0, 0, 120, 120, 240, 0 },
1619 { XFER_SW_DMA_1
, 90, 0, 0, 0, 240, 240, 480, 0 },
1620 { XFER_SW_DMA_0
, 120, 0, 0, 0, 480, 480, 960, 0 },
1622 /* { XFER_PIO_5, 20, 50, 30, 100, 50, 30, 100, 0 }, */
1623 { XFER_PIO_4
, 25, 70, 25, 120, 70, 25, 120, 0 },
1624 { XFER_PIO_3
, 30, 80, 70, 180, 80, 70, 180, 0 },
1626 { XFER_PIO_2
, 30, 290, 40, 330, 100, 90, 240, 0 },
1627 { XFER_PIO_1
, 50, 290, 93, 383, 125, 100, 383, 0 },
1628 { XFER_PIO_0
, 70, 290, 240, 600, 165, 150, 600, 0 },
1630 /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */
1635 #define ENOUGH(v,unit) (((v)-1)/(unit)+1)
1636 #define EZ(v,unit) ((v)?ENOUGH(v,unit):0)
1638 static void ata_timing_quantize(const struct ata_timing
*t
, struct ata_timing
*q
, int T
, int UT
)
1640 q
->setup
= EZ(t
->setup
* 1000, T
);
1641 q
->act8b
= EZ(t
->act8b
* 1000, T
);
1642 q
->rec8b
= EZ(t
->rec8b
* 1000, T
);
1643 q
->cyc8b
= EZ(t
->cyc8b
* 1000, T
);
1644 q
->active
= EZ(t
->active
* 1000, T
);
1645 q
->recover
= EZ(t
->recover
* 1000, T
);
1646 q
->cycle
= EZ(t
->cycle
* 1000, T
);
1647 q
->udma
= EZ(t
->udma
* 1000, UT
);
1650 void ata_timing_merge(const struct ata_timing
*a
, const struct ata_timing
*b
,
1651 struct ata_timing
*m
, unsigned int what
)
1653 if (what
& ATA_TIMING_SETUP
) m
->setup
= max(a
->setup
, b
->setup
);
1654 if (what
& ATA_TIMING_ACT8B
) m
->act8b
= max(a
->act8b
, b
->act8b
);
1655 if (what
& ATA_TIMING_REC8B
) m
->rec8b
= max(a
->rec8b
, b
->rec8b
);
1656 if (what
& ATA_TIMING_CYC8B
) m
->cyc8b
= max(a
->cyc8b
, b
->cyc8b
);
1657 if (what
& ATA_TIMING_ACTIVE
) m
->active
= max(a
->active
, b
->active
);
1658 if (what
& ATA_TIMING_RECOVER
) m
->recover
= max(a
->recover
, b
->recover
);
1659 if (what
& ATA_TIMING_CYCLE
) m
->cycle
= max(a
->cycle
, b
->cycle
);
1660 if (what
& ATA_TIMING_UDMA
) m
->udma
= max(a
->udma
, b
->udma
);
1663 static const struct ata_timing
* ata_timing_find_mode(unsigned short speed
)
1665 const struct ata_timing
*t
;
1667 for (t
= ata_timing
; t
->mode
!= speed
; t
++)
1668 if (t
->mode
== 0xFF)
1673 int ata_timing_compute(struct ata_device
*adev
, unsigned short speed
,
1674 struct ata_timing
*t
, int T
, int UT
)
1676 const struct ata_timing
*s
;
1677 struct ata_timing p
;
1683 if (!(s
= ata_timing_find_mode(speed
)))
1686 memcpy(t
, s
, sizeof(*s
));
1689 * If the drive is an EIDE drive, it can tell us it needs extended
1690 * PIO/MW_DMA cycle timing.
1693 if (adev
->id
[ATA_ID_FIELD_VALID
] & 2) { /* EIDE drive */
1694 memset(&p
, 0, sizeof(p
));
1695 if(speed
>= XFER_PIO_0
&& speed
<= XFER_SW_DMA_0
) {
1696 if (speed
<= XFER_PIO_2
) p
.cycle
= p
.cyc8b
= adev
->id
[ATA_ID_EIDE_PIO
];
1697 else p
.cycle
= p
.cyc8b
= adev
->id
[ATA_ID_EIDE_PIO_IORDY
];
1698 } else if(speed
>= XFER_MW_DMA_0
&& speed
<= XFER_MW_DMA_2
) {
1699 p
.cycle
= adev
->id
[ATA_ID_EIDE_DMA_MIN
];
1701 ata_timing_merge(&p
, t
, t
, ATA_TIMING_CYCLE
| ATA_TIMING_CYC8B
);
1705 * Convert the timing to bus clock counts.
1708 ata_timing_quantize(t
, t
, T
, UT
);
1711 * Even in DMA/UDMA modes we still use PIO access for IDENTIFY,
1712 * S.M.A.R.T * and some other commands. We have to ensure that the
1713 * DMA cycle timing is slower/equal than the fastest PIO timing.
1716 if (speed
> XFER_PIO_4
) {
1717 ata_timing_compute(adev
, adev
->pio_mode
, &p
, T
, UT
);
1718 ata_timing_merge(&p
, t
, t
, ATA_TIMING_ALL
);
1722 * Lengthen active & recovery time so that cycle time is correct.
1725 if (t
->act8b
+ t
->rec8b
< t
->cyc8b
) {
1726 t
->act8b
+= (t
->cyc8b
- (t
->act8b
+ t
->rec8b
)) / 2;
1727 t
->rec8b
= t
->cyc8b
- t
->act8b
;
1730 if (t
->active
+ t
->recover
< t
->cycle
) {
1731 t
->active
+= (t
->cycle
- (t
->active
+ t
->recover
)) / 2;
1732 t
->recover
= t
->cycle
- t
->active
;
1738 static int ata_dev_set_mode(struct ata_port
*ap
, struct ata_device
*dev
)
1740 unsigned int err_mask
;
1743 if (dev
->xfer_shift
== ATA_SHIFT_PIO
)
1744 dev
->flags
|= ATA_DFLAG_PIO
;
1746 err_mask
= ata_dev_set_xfermode(ap
, dev
);
1749 "ata%u: failed to set xfermode (err_mask=0x%x)\n",
1754 rc
= ata_dev_revalidate(ap
, dev
, 0);
1757 "ata%u: failed to revalidate after set xfermode\n",
1762 DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
1763 dev
->xfer_shift
, (int)dev
->xfer_mode
);
1765 printk(KERN_INFO
"ata%u: dev %u configured for %s\n",
1767 ata_mode_string(ata_xfer_mode2mask(dev
->xfer_mode
)));
1771 static int ata_host_set_pio(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
))
1781 if (!dev
->pio_mode
) {
1782 printk(KERN_WARNING
"ata%u: no PIO support for device %d.\n", ap
->id
, i
);
1786 dev
->xfer_mode
= dev
->pio_mode
;
1787 dev
->xfer_shift
= ATA_SHIFT_PIO
;
1788 if (ap
->ops
->set_piomode
)
1789 ap
->ops
->set_piomode(ap
, dev
);
1795 static void ata_host_set_dma(struct ata_port
*ap
)
1799 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
1800 struct ata_device
*dev
= &ap
->device
[i
];
1802 if (!ata_dev_present(dev
) || !dev
->dma_mode
)
1805 dev
->xfer_mode
= dev
->dma_mode
;
1806 dev
->xfer_shift
= ata_xfer_mode2shift(dev
->dma_mode
);
1807 if (ap
->ops
->set_dmamode
)
1808 ap
->ops
->set_dmamode(ap
, dev
);
1813 * ata_set_mode - Program timings and issue SET FEATURES - XFER
1814 * @ap: port on which timings will be programmed
1816 * Set ATA device disk transfer mode (PIO3, UDMA6, etc.).
1819 * PCI/etc. bus probe sem.
1821 static void ata_set_mode(struct ata_port
*ap
)
1823 int i
, rc
, used_dma
= 0;
1825 /* step 1: calculate xfer_mask */
1826 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
1827 struct ata_device
*dev
= &ap
->device
[i
];
1828 unsigned int pio_mask
, dma_mask
;
1830 if (!ata_dev_present(dev
))
1833 ata_dev_xfermask(ap
, dev
);
1835 /* TODO: let LLDD filter dev->*_mask here */
1837 pio_mask
= ata_pack_xfermask(dev
->pio_mask
, 0, 0);
1838 dma_mask
= ata_pack_xfermask(0, dev
->mwdma_mask
, dev
->udma_mask
);
1839 dev
->pio_mode
= ata_xfer_mask2mode(pio_mask
);
1840 dev
->dma_mode
= ata_xfer_mask2mode(dma_mask
);
1846 /* step 2: always set host PIO timings */
1847 rc
= ata_host_set_pio(ap
);
1851 /* step 3: set host DMA timings */
1852 ata_host_set_dma(ap
);
1854 /* step 4: update devices' xfer mode */
1855 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
1856 struct ata_device
*dev
= &ap
->device
[i
];
1858 if (!ata_dev_present(dev
))
1861 if (ata_dev_set_mode(ap
, dev
))
1866 * Record simplex status. If we selected DMA then the other
1867 * host channels are not permitted to do so.
1870 if (used_dma
&& (ap
->host_set
->flags
& ATA_HOST_SIMPLEX
))
1871 ap
->host_set
->simplex_claimed
= 1;
1874 * Chip specific finalisation
1876 if (ap
->ops
->post_set_mode
)
1877 ap
->ops
->post_set_mode(ap
);
1882 ata_port_disable(ap
);
1886 * ata_tf_to_host - issue ATA taskfile to host controller
1887 * @ap: port to which command is being issued
1888 * @tf: ATA taskfile register set
1890 * Issues ATA taskfile register set to ATA host controller,
1891 * with proper synchronization with interrupt handler and
1895 * spin_lock_irqsave(host_set lock)
1898 static inline void ata_tf_to_host(struct ata_port
*ap
,
1899 const struct ata_taskfile
*tf
)
1901 ap
->ops
->tf_load(ap
, tf
);
1902 ap
->ops
->exec_command(ap
, tf
);
1906 * ata_busy_sleep - sleep until BSY clears, or timeout
1907 * @ap: port containing status register to be polled
1908 * @tmout_pat: impatience timeout
1909 * @tmout: overall timeout
1911 * Sleep until ATA Status register bit BSY clears,
1912 * or a timeout occurs.
1917 unsigned int ata_busy_sleep (struct ata_port
*ap
,
1918 unsigned long tmout_pat
, unsigned long tmout
)
1920 unsigned long timer_start
, timeout
;
1923 status
= ata_busy_wait(ap
, ATA_BUSY
, 300);
1924 timer_start
= jiffies
;
1925 timeout
= timer_start
+ tmout_pat
;
1926 while ((status
& ATA_BUSY
) && (time_before(jiffies
, timeout
))) {
1928 status
= ata_busy_wait(ap
, ATA_BUSY
, 3);
1931 if (status
& ATA_BUSY
)
1932 printk(KERN_WARNING
"ata%u is slow to respond, "
1933 "please be patient\n", ap
->id
);
1935 timeout
= timer_start
+ tmout
;
1936 while ((status
& ATA_BUSY
) && (time_before(jiffies
, timeout
))) {
1938 status
= ata_chk_status(ap
);
1941 if (status
& ATA_BUSY
) {
1942 printk(KERN_ERR
"ata%u failed to respond (%lu secs)\n",
1943 ap
->id
, tmout
/ HZ
);
1950 static void ata_bus_post_reset(struct ata_port
*ap
, unsigned int devmask
)
1952 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
1953 unsigned int dev0
= devmask
& (1 << 0);
1954 unsigned int dev1
= devmask
& (1 << 1);
1955 unsigned long timeout
;
1957 /* if device 0 was found in ata_devchk, wait for its
1961 ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
);
1963 /* if device 1 was found in ata_devchk, wait for
1964 * register access, then wait for BSY to clear
1966 timeout
= jiffies
+ ATA_TMOUT_BOOT
;
1970 ap
->ops
->dev_select(ap
, 1);
1971 if (ap
->flags
& ATA_FLAG_MMIO
) {
1972 nsect
= readb((void __iomem
*) ioaddr
->nsect_addr
);
1973 lbal
= readb((void __iomem
*) ioaddr
->lbal_addr
);
1975 nsect
= inb(ioaddr
->nsect_addr
);
1976 lbal
= inb(ioaddr
->lbal_addr
);
1978 if ((nsect
== 1) && (lbal
== 1))
1980 if (time_after(jiffies
, timeout
)) {
1984 msleep(50); /* give drive a breather */
1987 ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
);
1989 /* is all this really necessary? */
1990 ap
->ops
->dev_select(ap
, 0);
1992 ap
->ops
->dev_select(ap
, 1);
1994 ap
->ops
->dev_select(ap
, 0);
1997 static unsigned int ata_bus_softreset(struct ata_port
*ap
,
1998 unsigned int devmask
)
2000 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
2002 DPRINTK("ata%u: bus reset via SRST\n", ap
->id
);
2004 /* software reset. causes dev0 to be selected */
2005 if (ap
->flags
& ATA_FLAG_MMIO
) {
2006 writeb(ap
->ctl
, (void __iomem
*) ioaddr
->ctl_addr
);
2007 udelay(20); /* FIXME: flush */
2008 writeb(ap
->ctl
| ATA_SRST
, (void __iomem
*) ioaddr
->ctl_addr
);
2009 udelay(20); /* FIXME: flush */
2010 writeb(ap
->ctl
, (void __iomem
*) ioaddr
->ctl_addr
);
2012 outb(ap
->ctl
, ioaddr
->ctl_addr
);
2014 outb(ap
->ctl
| ATA_SRST
, ioaddr
->ctl_addr
);
2016 outb(ap
->ctl
, ioaddr
->ctl_addr
);
2019 /* spec mandates ">= 2ms" before checking status.
2020 * We wait 150ms, because that was the magic delay used for
2021 * ATAPI devices in Hale Landis's ATADRVR, for the period of time
2022 * between when the ATA command register is written, and then
2023 * status is checked. Because waiting for "a while" before
2024 * checking status is fine, post SRST, we perform this magic
2025 * delay here as well.
2027 * Old drivers/ide uses the 2mS rule and then waits for ready
2031 /* Before we perform post reset processing we want to see if
2032 * the bus shows 0xFF because the odd clown forgets the D7
2033 * pulldown resistor.
2035 if (ata_check_status(ap
) == 0xFF)
2036 return AC_ERR_OTHER
;
2038 ata_bus_post_reset(ap
, devmask
);
2044 * ata_bus_reset - reset host port and associated ATA channel
2045 * @ap: port to reset
2047 * This is typically the first time we actually start issuing
2048 * commands to the ATA channel. We wait for BSY to clear, then
2049 * issue EXECUTE DEVICE DIAGNOSTIC command, polling for its
2050 * result. Determine what devices, if any, are on the channel
2051 * by looking at the device 0/1 error register. Look at the signature
2052 * stored in each device's taskfile registers, to determine if
2053 * the device is ATA or ATAPI.
2056 * PCI/etc. bus probe sem.
2057 * Obtains host_set lock.
2060 * Sets ATA_FLAG_PORT_DISABLED if bus reset fails.
2063 void ata_bus_reset(struct ata_port
*ap
)
2065 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
2066 unsigned int slave_possible
= ap
->flags
& ATA_FLAG_SLAVE_POSS
;
2068 unsigned int dev0
, dev1
= 0, devmask
= 0;
2070 DPRINTK("ENTER, host %u, port %u\n", ap
->id
, ap
->port_no
);
2072 /* determine if device 0/1 are present */
2073 if (ap
->flags
& ATA_FLAG_SATA_RESET
)
2076 dev0
= ata_devchk(ap
, 0);
2078 dev1
= ata_devchk(ap
, 1);
2082 devmask
|= (1 << 0);
2084 devmask
|= (1 << 1);
2086 /* select device 0 again */
2087 ap
->ops
->dev_select(ap
, 0);
2089 /* issue bus reset */
2090 if (ap
->flags
& ATA_FLAG_SRST
)
2091 if (ata_bus_softreset(ap
, devmask
))
2095 * determine by signature whether we have ATA or ATAPI devices
2097 ap
->device
[0].class = ata_dev_try_classify(ap
, 0, &err
);
2098 if ((slave_possible
) && (err
!= 0x81))
2099 ap
->device
[1].class = ata_dev_try_classify(ap
, 1, &err
);
2101 /* re-enable interrupts */
2102 if (ap
->ioaddr
.ctl_addr
) /* FIXME: hack. create a hook instead */
2105 /* is double-select really necessary? */
2106 if (ap
->device
[1].class != ATA_DEV_NONE
)
2107 ap
->ops
->dev_select(ap
, 1);
2108 if (ap
->device
[0].class != ATA_DEV_NONE
)
2109 ap
->ops
->dev_select(ap
, 0);
2111 /* if no devices were detected, disable this port */
2112 if ((ap
->device
[0].class == ATA_DEV_NONE
) &&
2113 (ap
->device
[1].class == ATA_DEV_NONE
))
2116 if (ap
->flags
& (ATA_FLAG_SATA_RESET
| ATA_FLAG_SRST
)) {
2117 /* set up device control for ATA_FLAG_SATA_RESET */
2118 if (ap
->flags
& ATA_FLAG_MMIO
)
2119 writeb(ap
->ctl
, (void __iomem
*) ioaddr
->ctl_addr
);
2121 outb(ap
->ctl
, ioaddr
->ctl_addr
);
2128 printk(KERN_ERR
"ata%u: disabling port\n", ap
->id
);
2129 ap
->ops
->port_disable(ap
);
2134 static int sata_phy_resume(struct ata_port
*ap
)
2136 unsigned long timeout
= jiffies
+ (HZ
* 5);
2139 scr_write_flush(ap
, SCR_CONTROL
, 0x300);
2141 /* Wait for phy to become ready, if necessary. */
2144 sstatus
= scr_read(ap
, SCR_STATUS
);
2145 if ((sstatus
& 0xf) != 1)
2147 } while (time_before(jiffies
, timeout
));
2153 * ata_std_probeinit - initialize probing
2154 * @ap: port to be probed
2156 * @ap is about to be probed. Initialize it. This function is
2157 * to be used as standard callback for ata_drive_probe_reset().
2159 * NOTE!!! Do not use this function as probeinit if a low level
2160 * driver implements only hardreset. Just pass NULL as probeinit
2161 * in that case. Using this function is probably okay but doing
2162 * so makes reset sequence different from the original
2163 * ->phy_reset implementation and Jeff nervous. :-P
2165 void ata_std_probeinit(struct ata_port
*ap
)
2167 if ((ap
->flags
& ATA_FLAG_SATA
) && ap
->ops
->scr_read
) {
2168 sata_phy_resume(ap
);
2169 if (sata_dev_present(ap
))
2170 ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
);
2175 * ata_std_softreset - reset host port via ATA SRST
2176 * @ap: port to reset
2177 * @verbose: fail verbosely
2178 * @classes: resulting classes of attached devices
2180 * Reset host port using ATA SRST. This function is to be used
2181 * as standard callback for ata_drive_*_reset() functions.
2184 * Kernel thread context (may sleep)
2187 * 0 on success, -errno otherwise.
2189 int ata_std_softreset(struct ata_port
*ap
, int verbose
, unsigned int *classes
)
2191 unsigned int slave_possible
= ap
->flags
& ATA_FLAG_SLAVE_POSS
;
2192 unsigned int devmask
= 0, err_mask
;
2197 if (ap
->ops
->scr_read
&& !sata_dev_present(ap
)) {
2198 classes
[0] = ATA_DEV_NONE
;
2202 /* determine if device 0/1 are present */
2203 if (ata_devchk(ap
, 0))
2204 devmask
|= (1 << 0);
2205 if (slave_possible
&& ata_devchk(ap
, 1))
2206 devmask
|= (1 << 1);
2208 /* select device 0 again */
2209 ap
->ops
->dev_select(ap
, 0);
2211 /* issue bus reset */
2212 DPRINTK("about to softreset, devmask=%x\n", devmask
);
2213 err_mask
= ata_bus_softreset(ap
, devmask
);
2216 printk(KERN_ERR
"ata%u: SRST failed (err_mask=0x%x)\n",
2219 DPRINTK("EXIT, softreset failed (err_mask=0x%x)\n",
2224 /* determine by signature whether we have ATA or ATAPI devices */
2225 classes
[0] = ata_dev_try_classify(ap
, 0, &err
);
2226 if (slave_possible
&& err
!= 0x81)
2227 classes
[1] = ata_dev_try_classify(ap
, 1, &err
);
2230 DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes
[0], classes
[1]);
2235 * sata_std_hardreset - reset host port via SATA phy reset
2236 * @ap: port to reset
2237 * @verbose: fail verbosely
2238 * @class: resulting class of attached device
2240 * SATA phy-reset host port using DET bits of SControl register.
2241 * This function is to be used as standard callback for
2242 * ata_drive_*_reset().
2245 * Kernel thread context (may sleep)
2248 * 0 on success, -errno otherwise.
2250 int sata_std_hardreset(struct ata_port
*ap
, int verbose
, unsigned int *class)
2254 /* Issue phy wake/reset */
2255 scr_write_flush(ap
, SCR_CONTROL
, 0x301);
2258 * Couldn't find anything in SATA I/II specs, but AHCI-1.1
2259 * 10.4.2 says at least 1 ms.
2263 /* Bring phy back */
2264 sata_phy_resume(ap
);
2266 /* TODO: phy layer with polling, timeouts, etc. */
2267 if (!sata_dev_present(ap
)) {
2268 *class = ATA_DEV_NONE
;
2269 DPRINTK("EXIT, link offline\n");
2273 if (ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
)) {
2275 printk(KERN_ERR
"ata%u: COMRESET failed "
2276 "(device not ready)\n", ap
->id
);
2278 DPRINTK("EXIT, device not ready\n");
2282 ap
->ops
->dev_select(ap
, 0); /* probably unnecessary */
2284 *class = ata_dev_try_classify(ap
, 0, NULL
);
2286 DPRINTK("EXIT, class=%u\n", *class);
2291 * ata_std_postreset - standard postreset callback
2292 * @ap: the target ata_port
2293 * @classes: classes of attached devices
2295 * This function is invoked after a successful reset. Note that
2296 * the device might have been reset more than once using
2297 * different reset methods before postreset is invoked.
2299 * This function is to be used as standard callback for
2300 * ata_drive_*_reset().
2303 * Kernel thread context (may sleep)
2305 void ata_std_postreset(struct ata_port
*ap
, unsigned int *classes
)
2309 /* set cable type if it isn't already set */
2310 if (ap
->cbl
== ATA_CBL_NONE
&& ap
->flags
& ATA_FLAG_SATA
)
2311 ap
->cbl
= ATA_CBL_SATA
;
2313 /* print link status */
2314 if (ap
->cbl
== ATA_CBL_SATA
)
2315 sata_print_link_status(ap
);
2317 /* re-enable interrupts */
2318 if (ap
->ioaddr
.ctl_addr
) /* FIXME: hack. create a hook instead */
2321 /* is double-select really necessary? */
2322 if (classes
[0] != ATA_DEV_NONE
)
2323 ap
->ops
->dev_select(ap
, 1);
2324 if (classes
[1] != ATA_DEV_NONE
)
2325 ap
->ops
->dev_select(ap
, 0);
2327 /* bail out if no device is present */
2328 if (classes
[0] == ATA_DEV_NONE
&& classes
[1] == ATA_DEV_NONE
) {
2329 DPRINTK("EXIT, no device\n");
2333 /* set up device control */
2334 if (ap
->ioaddr
.ctl_addr
) {
2335 if (ap
->flags
& ATA_FLAG_MMIO
)
2336 writeb(ap
->ctl
, (void __iomem
*) ap
->ioaddr
.ctl_addr
);
2338 outb(ap
->ctl
, ap
->ioaddr
.ctl_addr
);
2345 * ata_std_probe_reset - standard probe reset method
2346 * @ap: prot to perform probe-reset
2347 * @classes: resulting classes of attached devices
2349 * The stock off-the-shelf ->probe_reset method.
2352 * Kernel thread context (may sleep)
2355 * 0 on success, -errno otherwise.
2357 int ata_std_probe_reset(struct ata_port
*ap
, unsigned int *classes
)
2359 ata_reset_fn_t hardreset
;
2362 if (ap
->flags
& ATA_FLAG_SATA
&& ap
->ops
->scr_read
)
2363 hardreset
= sata_std_hardreset
;
2365 return ata_drive_probe_reset(ap
, ata_std_probeinit
,
2366 ata_std_softreset
, hardreset
,
2367 ata_std_postreset
, classes
);
2370 static int do_probe_reset(struct ata_port
*ap
, ata_reset_fn_t reset
,
2371 ata_postreset_fn_t postreset
,
2372 unsigned int *classes
)
2376 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
2377 classes
[i
] = ATA_DEV_UNKNOWN
;
2379 rc
= reset(ap
, 0, classes
);
2383 /* If any class isn't ATA_DEV_UNKNOWN, consider classification
2384 * is complete and convert all ATA_DEV_UNKNOWN to
2387 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
2388 if (classes
[i
] != ATA_DEV_UNKNOWN
)
2391 if (i
< ATA_MAX_DEVICES
)
2392 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
2393 if (classes
[i
] == ATA_DEV_UNKNOWN
)
2394 classes
[i
] = ATA_DEV_NONE
;
2397 postreset(ap
, classes
);
2399 return classes
[0] != ATA_DEV_UNKNOWN
? 0 : -ENODEV
;
2403 * ata_drive_probe_reset - Perform probe reset with given methods
2404 * @ap: port to reset
2405 * @probeinit: probeinit method (can be NULL)
2406 * @softreset: softreset method (can be NULL)
2407 * @hardreset: hardreset method (can be NULL)
2408 * @postreset: postreset method (can be NULL)
2409 * @classes: resulting classes of attached devices
2411 * Reset the specified port and classify attached devices using
2412 * given methods. This function prefers softreset but tries all
2413 * possible reset sequences to reset and classify devices. This
2414 * function is intended to be used for constructing ->probe_reset
2415 * callback by low level drivers.
2417 * Reset methods should follow the following rules.
2419 * - Return 0 on sucess, -errno on failure.
2420 * - If classification is supported, fill classes[] with
2421 * recognized class codes.
2422 * - If classification is not supported, leave classes[] alone.
2423 * - If verbose is non-zero, print error message on failure;
2424 * otherwise, shut up.
2427 * Kernel thread context (may sleep)
2430 * 0 on success, -EINVAL if no reset method is avaliable, -ENODEV
2431 * if classification fails, and any error code from reset
2434 int ata_drive_probe_reset(struct ata_port
*ap
, ata_probeinit_fn_t probeinit
,
2435 ata_reset_fn_t softreset
, ata_reset_fn_t hardreset
,
2436 ata_postreset_fn_t postreset
, unsigned int *classes
)
2444 rc
= do_probe_reset(ap
, softreset
, postreset
, classes
);
2452 rc
= do_probe_reset(ap
, hardreset
, postreset
, classes
);
2453 if (rc
== 0 || rc
!= -ENODEV
)
2457 rc
= do_probe_reset(ap
, softreset
, postreset
, classes
);
2463 * ata_dev_same_device - Determine whether new ID matches configured device
2464 * @ap: port on which the device to compare against resides
2465 * @dev: device to compare against
2466 * @new_class: class of the new device
2467 * @new_id: IDENTIFY page of the new device
2469 * Compare @new_class and @new_id against @dev and determine
2470 * whether @dev is the device indicated by @new_class and
2477 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
2479 static int ata_dev_same_device(struct ata_port
*ap
, struct ata_device
*dev
,
2480 unsigned int new_class
, const u16
*new_id
)
2482 const u16
*old_id
= dev
->id
;
2483 unsigned char model
[2][41], serial
[2][21];
2486 if (dev
->class != new_class
) {
2488 "ata%u: dev %u class mismatch %d != %d\n",
2489 ap
->id
, dev
->devno
, dev
->class, new_class
);
2493 ata_id_c_string(old_id
, model
[0], ATA_ID_PROD_OFS
, sizeof(model
[0]));
2494 ata_id_c_string(new_id
, model
[1], ATA_ID_PROD_OFS
, sizeof(model
[1]));
2495 ata_id_c_string(old_id
, serial
[0], ATA_ID_SERNO_OFS
, sizeof(serial
[0]));
2496 ata_id_c_string(new_id
, serial
[1], ATA_ID_SERNO_OFS
, sizeof(serial
[1]));
2497 new_n_sectors
= ata_id_n_sectors(new_id
);
2499 if (strcmp(model
[0], model
[1])) {
2501 "ata%u: dev %u model number mismatch '%s' != '%s'\n",
2502 ap
->id
, dev
->devno
, model
[0], model
[1]);
2506 if (strcmp(serial
[0], serial
[1])) {
2508 "ata%u: dev %u serial number mismatch '%s' != '%s'\n",
2509 ap
->id
, dev
->devno
, serial
[0], serial
[1]);
2513 if (dev
->class == ATA_DEV_ATA
&& dev
->n_sectors
!= new_n_sectors
) {
2515 "ata%u: dev %u n_sectors mismatch %llu != %llu\n",
2516 ap
->id
, dev
->devno
, (unsigned long long)dev
->n_sectors
,
2517 (unsigned long long)new_n_sectors
);
2525 * ata_dev_revalidate - Revalidate ATA device
2526 * @ap: port on which the device to revalidate resides
2527 * @dev: device to revalidate
2528 * @post_reset: is this revalidation after reset?
2530 * Re-read IDENTIFY page and make sure @dev is still attached to
2534 * Kernel thread context (may sleep)
2537 * 0 on success, negative errno otherwise
2539 int ata_dev_revalidate(struct ata_port
*ap
, struct ata_device
*dev
,
2546 if (!ata_dev_present(dev
))
2552 /* allocate & read ID data */
2553 rc
= ata_dev_read_id(ap
, dev
, &class, post_reset
, &id
);
2557 /* is the device still there? */
2558 if (!ata_dev_same_device(ap
, dev
, class, id
)) {
2566 /* configure device according to the new ID */
2567 return ata_dev_configure(ap
, dev
, 0);
2570 printk(KERN_ERR
"ata%u: dev %u revalidation failed (errno=%d)\n",
2571 ap
->id
, dev
->devno
, rc
);
2576 static const char * const ata_dma_blacklist
[] = {
2577 "WDC AC11000H", NULL
,
2578 "WDC AC22100H", NULL
,
2579 "WDC AC32500H", NULL
,
2580 "WDC AC33100H", NULL
,
2581 "WDC AC31600H", NULL
,
2582 "WDC AC32100H", "24.09P07",
2583 "WDC AC23200L", "21.10N21",
2584 "Compaq CRD-8241B", NULL
,
2589 "SanDisk SDP3B", NULL
,
2590 "SanDisk SDP3B-64", NULL
,
2591 "SANYO CD-ROM CRD", NULL
,
2592 "HITACHI CDR-8", NULL
,
2593 "HITACHI CDR-8335", NULL
,
2594 "HITACHI CDR-8435", NULL
,
2595 "Toshiba CD-ROM XM-6202B", NULL
,
2596 "TOSHIBA CD-ROM XM-1702BC", NULL
,
2598 "E-IDE CD-ROM CR-840", NULL
,
2599 "CD-ROM Drive/F5A", NULL
,
2600 "WPI CDD-820", NULL
,
2601 "SAMSUNG CD-ROM SC-148C", NULL
,
2602 "SAMSUNG CD-ROM SC", NULL
,
2603 "SanDisk SDP3B-64", NULL
,
2604 "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL
,
2605 "_NEC DV5800A", NULL
,
2606 "SAMSUNG CD-ROM SN-124", "N001"
2609 static int ata_strim(char *s
, size_t len
)
2611 len
= strnlen(s
, len
);
2613 /* ATAPI specifies that empty space is blank-filled; remove blanks */
2614 while ((len
> 0) && (s
[len
- 1] == ' ')) {
2621 static int ata_dma_blacklisted(const struct ata_device
*dev
)
2623 unsigned char model_num
[40];
2624 unsigned char model_rev
[16];
2625 unsigned int nlen
, rlen
;
2628 ata_id_string(dev
->id
, model_num
, ATA_ID_PROD_OFS
,
2630 ata_id_string(dev
->id
, model_rev
, ATA_ID_FW_REV_OFS
,
2632 nlen
= ata_strim(model_num
, sizeof(model_num
));
2633 rlen
= ata_strim(model_rev
, sizeof(model_rev
));
2635 for (i
= 0; i
< ARRAY_SIZE(ata_dma_blacklist
); i
+= 2) {
2636 if (!strncmp(ata_dma_blacklist
[i
], model_num
, nlen
)) {
2637 if (ata_dma_blacklist
[i
+1] == NULL
)
2639 if (!strncmp(ata_dma_blacklist
[i
], model_rev
, rlen
))
2647 * ata_dev_xfermask - Compute supported xfermask of the given device
2648 * @ap: Port on which the device to compute xfermask for resides
2649 * @dev: Device to compute xfermask for
2651 * Compute supported xfermask of @dev and store it in
2652 * dev->*_mask. This function is responsible for applying all
2653 * known limits including host controller limits, device
2656 * FIXME: The current implementation limits all transfer modes to
2657 * the fastest of the lowested device on the port. This is not
2658 * required on most controllers.
2663 static void ata_dev_xfermask(struct ata_port
*ap
, struct ata_device
*dev
)
2665 struct ata_host_set
*hs
= ap
->host_set
;
2666 unsigned long xfer_mask
;
2669 xfer_mask
= ata_pack_xfermask(ap
->pio_mask
, ap
->mwdma_mask
,
2672 /* FIXME: Use port-wide xfermask for now */
2673 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
2674 struct ata_device
*d
= &ap
->device
[i
];
2675 if (!ata_dev_present(d
))
2677 xfer_mask
&= ata_pack_xfermask(d
->pio_mask
, d
->mwdma_mask
,
2679 xfer_mask
&= ata_id_xfermask(d
->id
);
2680 if (ata_dma_blacklisted(d
))
2681 xfer_mask
&= ~(ATA_MASK_MWDMA
| ATA_MASK_UDMA
);
2682 /* Apply cable rule here. Don't apply it early because when
2683 we handle hot plug the cable type can itself change */
2684 if (ap
->cbl
== ATA_CBL_PATA40
)
2685 xfer_mask
&= ~(0xF8 << ATA_SHIFT_UDMA
);
2688 if (ata_dma_blacklisted(dev
))
2689 printk(KERN_WARNING
"ata%u: dev %u is on DMA blacklist, "
2690 "disabling DMA\n", ap
->id
, dev
->devno
);
2692 if (hs
->flags
& ATA_HOST_SIMPLEX
) {
2693 if (hs
->simplex_claimed
)
2694 xfer_mask
&= ~(ATA_MASK_MWDMA
| ATA_MASK_UDMA
);
2696 if (ap
->ops
->mode_filter
)
2697 xfer_mask
= ap
->ops
->mode_filter(ap
, dev
, xfer_mask
);
2699 ata_unpack_xfermask(xfer_mask
, &dev
->pio_mask
, &dev
->mwdma_mask
,
2704 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
2705 * @ap: Port associated with device @dev
2706 * @dev: Device to which command will be sent
2708 * Issue SET FEATURES - XFER MODE command to device @dev
2712 * PCI/etc. bus probe sem.
2715 * 0 on success, AC_ERR_* mask otherwise.
2718 static unsigned int ata_dev_set_xfermode(struct ata_port
*ap
,
2719 struct ata_device
*dev
)
2721 struct ata_taskfile tf
;
2722 unsigned int err_mask
;
2724 /* set up set-features taskfile */
2725 DPRINTK("set features - xfer mode\n");
2727 ata_tf_init(ap
, &tf
, dev
->devno
);
2728 tf
.command
= ATA_CMD_SET_FEATURES
;
2729 tf
.feature
= SETFEATURES_XFER
;
2730 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
2731 tf
.protocol
= ATA_PROT_NODATA
;
2732 tf
.nsect
= dev
->xfer_mode
;
2734 err_mask
= ata_exec_internal(ap
, dev
, &tf
, DMA_NONE
, NULL
, 0);
2736 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
2741 * ata_dev_init_params - Issue INIT DEV PARAMS command
2742 * @ap: Port associated with device @dev
2743 * @dev: Device to which command will be sent
2746 * Kernel thread context (may sleep)
2749 * 0 on success, AC_ERR_* mask otherwise.
2752 static unsigned int ata_dev_init_params(struct ata_port
*ap
,
2753 struct ata_device
*dev
,
2757 struct ata_taskfile tf
;
2758 unsigned int err_mask
;
2760 /* Number of sectors per track 1-255. Number of heads 1-16 */
2761 if (sectors
< 1 || sectors
> 255 || heads
< 1 || heads
> 16)
2762 return AC_ERR_INVALID
;
2764 /* set up init dev params taskfile */
2765 DPRINTK("init dev params \n");
2767 ata_tf_init(ap
, &tf
, dev
->devno
);
2768 tf
.command
= ATA_CMD_INIT_DEV_PARAMS
;
2769 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
2770 tf
.protocol
= ATA_PROT_NODATA
;
2772 tf
.device
|= (heads
- 1) & 0x0f; /* max head = num. of heads - 1 */
2774 err_mask
= ata_exec_internal(ap
, dev
, &tf
, DMA_NONE
, NULL
, 0);
2776 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
2781 * ata_sg_clean - Unmap DMA memory associated with command
2782 * @qc: Command containing DMA memory to be released
2784 * Unmap all mapped DMA memory associated with this command.
2787 * spin_lock_irqsave(host_set lock)
2790 static void ata_sg_clean(struct ata_queued_cmd
*qc
)
2792 struct ata_port
*ap
= qc
->ap
;
2793 struct scatterlist
*sg
= qc
->__sg
;
2794 int dir
= qc
->dma_dir
;
2795 void *pad_buf
= NULL
;
2797 WARN_ON(!(qc
->flags
& ATA_QCFLAG_DMAMAP
));
2798 WARN_ON(sg
== NULL
);
2800 if (qc
->flags
& ATA_QCFLAG_SINGLE
)
2801 WARN_ON(qc
->n_elem
> 1);
2803 VPRINTK("unmapping %u sg elements\n", qc
->n_elem
);
2805 /* if we padded the buffer out to 32-bit bound, and data
2806 * xfer direction is from-device, we must copy from the
2807 * pad buffer back into the supplied buffer
2809 if (qc
->pad_len
&& !(qc
->tf
.flags
& ATA_TFLAG_WRITE
))
2810 pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
2812 if (qc
->flags
& ATA_QCFLAG_SG
) {
2814 dma_unmap_sg(ap
->dev
, sg
, qc
->n_elem
, dir
);
2815 /* restore last sg */
2816 sg
[qc
->orig_n_elem
- 1].length
+= qc
->pad_len
;
2818 struct scatterlist
*psg
= &qc
->pad_sgent
;
2819 void *addr
= kmap_atomic(psg
->page
, KM_IRQ0
);
2820 memcpy(addr
+ psg
->offset
, pad_buf
, qc
->pad_len
);
2821 kunmap_atomic(addr
, KM_IRQ0
);
2825 dma_unmap_single(ap
->dev
,
2826 sg_dma_address(&sg
[0]), sg_dma_len(&sg
[0]),
2829 sg
->length
+= qc
->pad_len
;
2831 memcpy(qc
->buf_virt
+ sg
->length
- qc
->pad_len
,
2832 pad_buf
, qc
->pad_len
);
2835 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
2840 * ata_fill_sg - Fill PCI IDE PRD table
2841 * @qc: Metadata associated with taskfile to be transferred
2843 * Fill PCI IDE PRD (scatter-gather) table with segments
2844 * associated with the current disk command.
2847 * spin_lock_irqsave(host_set lock)
2850 static void ata_fill_sg(struct ata_queued_cmd
*qc
)
2852 struct ata_port
*ap
= qc
->ap
;
2853 struct scatterlist
*sg
;
2856 WARN_ON(qc
->__sg
== NULL
);
2857 WARN_ON(qc
->n_elem
== 0 && qc
->pad_len
== 0);
2860 ata_for_each_sg(sg
, qc
) {
2864 /* determine if physical DMA addr spans 64K boundary.
2865 * Note h/w doesn't support 64-bit, so we unconditionally
2866 * truncate dma_addr_t to u32.
2868 addr
= (u32
) sg_dma_address(sg
);
2869 sg_len
= sg_dma_len(sg
);
2872 offset
= addr
& 0xffff;
2874 if ((offset
+ sg_len
) > 0x10000)
2875 len
= 0x10000 - offset
;
2877 ap
->prd
[idx
].addr
= cpu_to_le32(addr
);
2878 ap
->prd
[idx
].flags_len
= cpu_to_le32(len
& 0xffff);
2879 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx
, addr
, len
);
2888 ap
->prd
[idx
- 1].flags_len
|= cpu_to_le32(ATA_PRD_EOT
);
2891 * ata_check_atapi_dma - Check whether ATAPI DMA can be supported
2892 * @qc: Metadata associated with taskfile to check
2894 * Allow low-level driver to filter ATA PACKET commands, returning
2895 * a status indicating whether or not it is OK to use DMA for the
2896 * supplied PACKET command.
2899 * spin_lock_irqsave(host_set lock)
2901 * RETURNS: 0 when ATAPI DMA can be used
2904 int ata_check_atapi_dma(struct ata_queued_cmd
*qc
)
2906 struct ata_port
*ap
= qc
->ap
;
2907 int rc
= 0; /* Assume ATAPI DMA is OK by default */
2909 if (ap
->ops
->check_atapi_dma
)
2910 rc
= ap
->ops
->check_atapi_dma(qc
);
2915 * ata_qc_prep - Prepare taskfile for submission
2916 * @qc: Metadata associated with taskfile to be prepared
2918 * Prepare ATA taskfile for submission.
2921 * spin_lock_irqsave(host_set lock)
2923 void ata_qc_prep(struct ata_queued_cmd
*qc
)
2925 if (!(qc
->flags
& ATA_QCFLAG_DMAMAP
))
2931 void ata_noop_qc_prep(struct ata_queued_cmd
*qc
) { }
2934 * ata_sg_init_one - Associate command with memory buffer
2935 * @qc: Command to be associated
2936 * @buf: Memory buffer
2937 * @buflen: Length of memory buffer, in bytes.
2939 * Initialize the data-related elements of queued_cmd @qc
2940 * to point to a single memory buffer, @buf of byte length @buflen.
2943 * spin_lock_irqsave(host_set lock)
2946 void ata_sg_init_one(struct ata_queued_cmd
*qc
, void *buf
, unsigned int buflen
)
2948 struct scatterlist
*sg
;
2950 qc
->flags
|= ATA_QCFLAG_SINGLE
;
2952 memset(&qc
->sgent
, 0, sizeof(qc
->sgent
));
2953 qc
->__sg
= &qc
->sgent
;
2955 qc
->orig_n_elem
= 1;
2959 sg_init_one(sg
, buf
, buflen
);
2963 * ata_sg_init - Associate command with scatter-gather table.
2964 * @qc: Command to be associated
2965 * @sg: Scatter-gather table.
2966 * @n_elem: Number of elements in s/g table.
2968 * Initialize the data-related elements of queued_cmd @qc
2969 * to point to a scatter-gather table @sg, containing @n_elem
2973 * spin_lock_irqsave(host_set lock)
2976 void ata_sg_init(struct ata_queued_cmd
*qc
, struct scatterlist
*sg
,
2977 unsigned int n_elem
)
2979 qc
->flags
|= ATA_QCFLAG_SG
;
2981 qc
->n_elem
= n_elem
;
2982 qc
->orig_n_elem
= n_elem
;
2986 * ata_sg_setup_one - DMA-map the memory buffer associated with a command.
2987 * @qc: Command with memory buffer to be mapped.
2989 * DMA-map the memory buffer associated with queued_cmd @qc.
2992 * spin_lock_irqsave(host_set lock)
2995 * Zero on success, negative on error.
2998 static int ata_sg_setup_one(struct ata_queued_cmd
*qc
)
3000 struct ata_port
*ap
= qc
->ap
;
3001 int dir
= qc
->dma_dir
;
3002 struct scatterlist
*sg
= qc
->__sg
;
3003 dma_addr_t dma_address
;
3006 /* we must lengthen transfers to end on a 32-bit boundary */
3007 qc
->pad_len
= sg
->length
& 3;
3009 void *pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
3010 struct scatterlist
*psg
= &qc
->pad_sgent
;
3012 WARN_ON(qc
->dev
->class != ATA_DEV_ATAPI
);
3014 memset(pad_buf
, 0, ATA_DMA_PAD_SZ
);
3016 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
)
3017 memcpy(pad_buf
, qc
->buf_virt
+ sg
->length
- qc
->pad_len
,
3020 sg_dma_address(psg
) = ap
->pad_dma
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
3021 sg_dma_len(psg
) = ATA_DMA_PAD_SZ
;
3023 sg
->length
-= qc
->pad_len
;
3024 if (sg
->length
== 0)
3027 DPRINTK("padding done, sg->length=%u pad_len=%u\n",
3028 sg
->length
, qc
->pad_len
);
3036 dma_address
= dma_map_single(ap
->dev
, qc
->buf_virt
,
3038 if (dma_mapping_error(dma_address
)) {
3040 sg
->length
+= qc
->pad_len
;
3044 sg_dma_address(sg
) = dma_address
;
3045 sg_dma_len(sg
) = sg
->length
;
3048 DPRINTK("mapped buffer of %d bytes for %s\n", sg_dma_len(sg
),
3049 qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
3055 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
3056 * @qc: Command with scatter-gather table to be mapped.
3058 * DMA-map the scatter-gather table associated with queued_cmd @qc.
3061 * spin_lock_irqsave(host_set lock)
3064 * Zero on success, negative on error.
3068 static int ata_sg_setup(struct ata_queued_cmd
*qc
)
3070 struct ata_port
*ap
= qc
->ap
;
3071 struct scatterlist
*sg
= qc
->__sg
;
3072 struct scatterlist
*lsg
= &sg
[qc
->n_elem
- 1];
3073 int n_elem
, pre_n_elem
, dir
, trim_sg
= 0;
3075 VPRINTK("ENTER, ata%u\n", ap
->id
);
3076 WARN_ON(!(qc
->flags
& ATA_QCFLAG_SG
));
3078 /* we must lengthen transfers to end on a 32-bit boundary */
3079 qc
->pad_len
= lsg
->length
& 3;
3081 void *pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
3082 struct scatterlist
*psg
= &qc
->pad_sgent
;
3083 unsigned int offset
;
3085 WARN_ON(qc
->dev
->class != ATA_DEV_ATAPI
);
3087 memset(pad_buf
, 0, ATA_DMA_PAD_SZ
);
3090 * psg->page/offset are used to copy to-be-written
3091 * data in this function or read data in ata_sg_clean.
3093 offset
= lsg
->offset
+ lsg
->length
- qc
->pad_len
;
3094 psg
->page
= nth_page(lsg
->page
, offset
>> PAGE_SHIFT
);
3095 psg
->offset
= offset_in_page(offset
);
3097 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
) {
3098 void *addr
= kmap_atomic(psg
->page
, KM_IRQ0
);
3099 memcpy(pad_buf
, addr
+ psg
->offset
, qc
->pad_len
);
3100 kunmap_atomic(addr
, KM_IRQ0
);
3103 sg_dma_address(psg
) = ap
->pad_dma
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
3104 sg_dma_len(psg
) = ATA_DMA_PAD_SZ
;
3106 lsg
->length
-= qc
->pad_len
;
3107 if (lsg
->length
== 0)
3110 DPRINTK("padding done, sg[%d].length=%u pad_len=%u\n",
3111 qc
->n_elem
- 1, lsg
->length
, qc
->pad_len
);
3114 pre_n_elem
= qc
->n_elem
;
3115 if (trim_sg
&& pre_n_elem
)
3124 n_elem
= dma_map_sg(ap
->dev
, sg
, pre_n_elem
, dir
);
3126 /* restore last sg */
3127 lsg
->length
+= qc
->pad_len
;
3131 DPRINTK("%d sg elements mapped\n", n_elem
);
3134 qc
->n_elem
= n_elem
;
3140 * ata_poll_qc_complete - turn irq back on and finish qc
3141 * @qc: Command to complete
3142 * @err_mask: ATA status register content
3145 * None. (grabs host lock)
3148 void ata_poll_qc_complete(struct ata_queued_cmd
*qc
)
3150 struct ata_port
*ap
= qc
->ap
;
3151 unsigned long flags
;
3153 spin_lock_irqsave(&ap
->host_set
->lock
, flags
);
3154 ap
->flags
&= ~ATA_FLAG_NOINTR
;
3156 ata_qc_complete(qc
);
3157 spin_unlock_irqrestore(&ap
->host_set
->lock
, flags
);
3161 * ata_pio_poll - poll using PIO, depending on current state
3162 * @ap: the target ata_port
3165 * None. (executing in kernel thread context)
3168 * timeout value to use
3171 static unsigned long ata_pio_poll(struct ata_port
*ap
)
3173 struct ata_queued_cmd
*qc
;
3175 unsigned int poll_state
= HSM_ST_UNKNOWN
;
3176 unsigned int reg_state
= HSM_ST_UNKNOWN
;
3178 qc
= ata_qc_from_tag(ap
, ap
->active_tag
);
3179 WARN_ON(qc
== NULL
);
3181 switch (ap
->hsm_task_state
) {
3184 poll_state
= HSM_ST_POLL
;
3188 case HSM_ST_LAST_POLL
:
3189 poll_state
= HSM_ST_LAST_POLL
;
3190 reg_state
= HSM_ST_LAST
;
3197 status
= ata_chk_status(ap
);
3198 if (status
& ATA_BUSY
) {
3199 if (time_after(jiffies
, ap
->pio_task_timeout
)) {
3200 qc
->err_mask
|= AC_ERR_TIMEOUT
;
3201 ap
->hsm_task_state
= HSM_ST_TMOUT
;
3204 ap
->hsm_task_state
= poll_state
;
3205 return ATA_SHORT_PAUSE
;
3208 ap
->hsm_task_state
= reg_state
;
3213 * ata_pio_complete - check if drive is busy or idle
3214 * @ap: the target ata_port
3217 * None. (executing in kernel thread context)
3220 * Non-zero if qc completed, zero otherwise.
3223 static int ata_pio_complete (struct ata_port
*ap
)
3225 struct ata_queued_cmd
*qc
;
3229 * This is purely heuristic. This is a fast path. Sometimes when
3230 * we enter, BSY will be cleared in a chk-status or two. If not,
3231 * the drive is probably seeking or something. Snooze for a couple
3232 * msecs, then chk-status again. If still busy, fall back to
3233 * HSM_ST_POLL state.
3235 drv_stat
= ata_busy_wait(ap
, ATA_BUSY
, 10);
3236 if (drv_stat
& ATA_BUSY
) {
3238 drv_stat
= ata_busy_wait(ap
, ATA_BUSY
, 10);
3239 if (drv_stat
& ATA_BUSY
) {
3240 ap
->hsm_task_state
= HSM_ST_LAST_POLL
;
3241 ap
->pio_task_timeout
= jiffies
+ ATA_TMOUT_PIO
;
3246 qc
= ata_qc_from_tag(ap
, ap
->active_tag
);
3247 WARN_ON(qc
== NULL
);
3249 drv_stat
= ata_wait_idle(ap
);
3250 if (!ata_ok(drv_stat
)) {
3251 qc
->err_mask
|= __ac_err_mask(drv_stat
);
3252 ap
->hsm_task_state
= HSM_ST_ERR
;
3256 ap
->hsm_task_state
= HSM_ST_IDLE
;
3258 WARN_ON(qc
->err_mask
);
3259 ata_poll_qc_complete(qc
);
3261 /* another command may start at this point */
3268 * swap_buf_le16 - swap halves of 16-bit words in place
3269 * @buf: Buffer to swap
3270 * @buf_words: Number of 16-bit words in buffer.
3272 * Swap halves of 16-bit words if needed to convert from
3273 * little-endian byte order to native cpu byte order, or
3277 * Inherited from caller.
3279 void swap_buf_le16(u16
*buf
, unsigned int buf_words
)
3284 for (i
= 0; i
< buf_words
; i
++)
3285 buf
[i
] = le16_to_cpu(buf
[i
]);
3286 #endif /* __BIG_ENDIAN */
3290 * ata_mmio_data_xfer - Transfer data by MMIO
3291 * @ap: port to read/write
3293 * @buflen: buffer length
3294 * @write_data: read/write
3296 * Transfer data from/to the device data register by MMIO.
3299 * Inherited from caller.
3302 static void ata_mmio_data_xfer(struct ata_port
*ap
, unsigned char *buf
,
3303 unsigned int buflen
, int write_data
)
3306 unsigned int words
= buflen
>> 1;
3307 u16
*buf16
= (u16
*) buf
;
3308 void __iomem
*mmio
= (void __iomem
*)ap
->ioaddr
.data_addr
;
3310 /* Transfer multiple of 2 bytes */
3312 for (i
= 0; i
< words
; i
++)
3313 writew(le16_to_cpu(buf16
[i
]), mmio
);
3315 for (i
= 0; i
< words
; i
++)
3316 buf16
[i
] = cpu_to_le16(readw(mmio
));
3319 /* Transfer trailing 1 byte, if any. */
3320 if (unlikely(buflen
& 0x01)) {
3321 u16 align_buf
[1] = { 0 };
3322 unsigned char *trailing_buf
= buf
+ buflen
- 1;
3325 memcpy(align_buf
, trailing_buf
, 1);
3326 writew(le16_to_cpu(align_buf
[0]), mmio
);
3328 align_buf
[0] = cpu_to_le16(readw(mmio
));
3329 memcpy(trailing_buf
, align_buf
, 1);
3335 * ata_pio_data_xfer - Transfer data by PIO
3336 * @ap: port to read/write
3338 * @buflen: buffer length
3339 * @write_data: read/write
3341 * Transfer data from/to the device data register by PIO.
3344 * Inherited from caller.
3347 static void ata_pio_data_xfer(struct ata_port
*ap
, unsigned char *buf
,
3348 unsigned int buflen
, int write_data
)
3350 unsigned int words
= buflen
>> 1;
3352 /* Transfer multiple of 2 bytes */
3354 outsw(ap
->ioaddr
.data_addr
, buf
, words
);
3356 insw(ap
->ioaddr
.data_addr
, buf
, words
);
3358 /* Transfer trailing 1 byte, if any. */
3359 if (unlikely(buflen
& 0x01)) {
3360 u16 align_buf
[1] = { 0 };
3361 unsigned char *trailing_buf
= buf
+ buflen
- 1;
3364 memcpy(align_buf
, trailing_buf
, 1);
3365 outw(le16_to_cpu(align_buf
[0]), ap
->ioaddr
.data_addr
);
3367 align_buf
[0] = cpu_to_le16(inw(ap
->ioaddr
.data_addr
));
3368 memcpy(trailing_buf
, align_buf
, 1);
3374 * ata_data_xfer - Transfer data from/to the data register.
3375 * @ap: port to read/write
3377 * @buflen: buffer length
3378 * @do_write: read/write
3380 * Transfer data from/to the device data register.
3383 * Inherited from caller.
3386 static void ata_data_xfer(struct ata_port
*ap
, unsigned char *buf
,
3387 unsigned int buflen
, int do_write
)
3389 /* Make the crap hardware pay the costs not the good stuff */
3390 if (unlikely(ap
->flags
& ATA_FLAG_IRQ_MASK
)) {
3391 unsigned long flags
;
3392 local_irq_save(flags
);
3393 if (ap
->flags
& ATA_FLAG_MMIO
)
3394 ata_mmio_data_xfer(ap
, buf
, buflen
, do_write
);
3396 ata_pio_data_xfer(ap
, buf
, buflen
, do_write
);
3397 local_irq_restore(flags
);
3399 if (ap
->flags
& ATA_FLAG_MMIO
)
3400 ata_mmio_data_xfer(ap
, buf
, buflen
, do_write
);
3402 ata_pio_data_xfer(ap
, buf
, buflen
, do_write
);
3407 * ata_pio_sector - Transfer ATA_SECT_SIZE (512 bytes) of data.
3408 * @qc: Command on going
3410 * Transfer ATA_SECT_SIZE of data from/to the ATA device.
3413 * Inherited from caller.
3416 static void ata_pio_sector(struct ata_queued_cmd
*qc
)
3418 int do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
);
3419 struct scatterlist
*sg
= qc
->__sg
;
3420 struct ata_port
*ap
= qc
->ap
;
3422 unsigned int offset
;
3425 if (qc
->cursect
== (qc
->nsect
- 1))
3426 ap
->hsm_task_state
= HSM_ST_LAST
;
3428 page
= sg
[qc
->cursg
].page
;
3429 offset
= sg
[qc
->cursg
].offset
+ qc
->cursg_ofs
* ATA_SECT_SIZE
;
3431 /* get the current page and offset */
3432 page
= nth_page(page
, (offset
>> PAGE_SHIFT
));
3433 offset
%= PAGE_SIZE
;
3435 buf
= kmap(page
) + offset
;
3440 if ((qc
->cursg_ofs
* ATA_SECT_SIZE
) == (&sg
[qc
->cursg
])->length
) {
3445 DPRINTK("data %s\n", qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
3447 /* do the actual data transfer */
3448 do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
);
3449 ata_data_xfer(ap
, buf
, ATA_SECT_SIZE
, do_write
);
3455 * __atapi_pio_bytes - Transfer data from/to the ATAPI device.
3456 * @qc: Command on going
3457 * @bytes: number of bytes
3459 * Transfer Transfer data from/to the ATAPI device.
3462 * Inherited from caller.
3466 static void __atapi_pio_bytes(struct ata_queued_cmd
*qc
, unsigned int bytes
)
3468 int do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
);
3469 struct scatterlist
*sg
= qc
->__sg
;
3470 struct ata_port
*ap
= qc
->ap
;
3473 unsigned int offset
, count
;
3475 if (qc
->curbytes
+ bytes
>= qc
->nbytes
)
3476 ap
->hsm_task_state
= HSM_ST_LAST
;
3479 if (unlikely(qc
->cursg
>= qc
->n_elem
)) {
3481 * The end of qc->sg is reached and the device expects
3482 * more data to transfer. In order not to overrun qc->sg
3483 * and fulfill length specified in the byte count register,
3484 * - for read case, discard trailing data from the device
3485 * - for write case, padding zero data to the device
3487 u16 pad_buf
[1] = { 0 };
3488 unsigned int words
= bytes
>> 1;
3491 if (words
) /* warning if bytes > 1 */
3492 printk(KERN_WARNING
"ata%u: %u bytes trailing data\n",
3495 for (i
= 0; i
< words
; i
++)
3496 ata_data_xfer(ap
, (unsigned char*)pad_buf
, 2, do_write
);
3498 ap
->hsm_task_state
= HSM_ST_LAST
;
3502 sg
= &qc
->__sg
[qc
->cursg
];
3505 offset
= sg
->offset
+ qc
->cursg_ofs
;
3507 /* get the current page and offset */
3508 page
= nth_page(page
, (offset
>> PAGE_SHIFT
));
3509 offset
%= PAGE_SIZE
;
3511 /* don't overrun current sg */
3512 count
= min(sg
->length
- qc
->cursg_ofs
, bytes
);
3514 /* don't cross page boundaries */
3515 count
= min(count
, (unsigned int)PAGE_SIZE
- offset
);
3517 buf
= kmap(page
) + offset
;
3520 qc
->curbytes
+= count
;
3521 qc
->cursg_ofs
+= count
;
3523 if (qc
->cursg_ofs
== sg
->length
) {
3528 DPRINTK("data %s\n", qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
3530 /* do the actual data transfer */
3531 ata_data_xfer(ap
, buf
, count
, do_write
);
3540 * atapi_pio_bytes - Transfer data from/to the ATAPI device.
3541 * @qc: Command on going
3543 * Transfer Transfer data from/to the ATAPI device.
3546 * Inherited from caller.
3549 static void atapi_pio_bytes(struct ata_queued_cmd
*qc
)
3551 struct ata_port
*ap
= qc
->ap
;
3552 struct ata_device
*dev
= qc
->dev
;
3553 unsigned int ireason
, bc_lo
, bc_hi
, bytes
;
3554 int i_write
, do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
) ? 1 : 0;
3556 ap
->ops
->tf_read(ap
, &qc
->tf
);
3557 ireason
= qc
->tf
.nsect
;
3558 bc_lo
= qc
->tf
.lbam
;
3559 bc_hi
= qc
->tf
.lbah
;
3560 bytes
= (bc_hi
<< 8) | bc_lo
;
3562 /* shall be cleared to zero, indicating xfer of data */
3563 if (ireason
& (1 << 0))
3566 /* make sure transfer direction matches expected */
3567 i_write
= ((ireason
& (1 << 1)) == 0) ? 1 : 0;
3568 if (do_write
!= i_write
)
3571 __atapi_pio_bytes(qc
, bytes
);
3576 printk(KERN_INFO
"ata%u: dev %u: ATAPI check failed\n",
3577 ap
->id
, dev
->devno
);
3578 qc
->err_mask
|= AC_ERR_HSM
;
3579 ap
->hsm_task_state
= HSM_ST_ERR
;
3583 * ata_pio_block - start PIO on a block
3584 * @ap: the target ata_port
3587 * None. (executing in kernel thread context)
3590 static void ata_pio_block(struct ata_port
*ap
)
3592 struct ata_queued_cmd
*qc
;
3596 * This is purely heuristic. This is a fast path.
3597 * Sometimes when we enter, BSY will be cleared in
3598 * a chk-status or two. If not, the drive is probably seeking
3599 * or something. Snooze for a couple msecs, then
3600 * chk-status again. If still busy, fall back to
3601 * HSM_ST_POLL state.
3603 status
= ata_busy_wait(ap
, ATA_BUSY
, 5);
3604 if (status
& ATA_BUSY
) {
3606 status
= ata_busy_wait(ap
, ATA_BUSY
, 10);
3607 if (status
& ATA_BUSY
) {
3608 ap
->hsm_task_state
= HSM_ST_POLL
;
3609 ap
->pio_task_timeout
= jiffies
+ ATA_TMOUT_PIO
;
3614 qc
= ata_qc_from_tag(ap
, ap
->active_tag
);
3615 WARN_ON(qc
== NULL
);
3618 if (status
& (ATA_ERR
| ATA_DF
)) {
3619 qc
->err_mask
|= AC_ERR_DEV
;
3620 ap
->hsm_task_state
= HSM_ST_ERR
;
3624 /* transfer data if any */
3625 if (is_atapi_taskfile(&qc
->tf
)) {
3626 /* DRQ=0 means no more data to transfer */
3627 if ((status
& ATA_DRQ
) == 0) {
3628 ap
->hsm_task_state
= HSM_ST_LAST
;
3632 atapi_pio_bytes(qc
);
3634 /* handle BSY=0, DRQ=0 as error */
3635 if ((status
& ATA_DRQ
) == 0) {
3636 qc
->err_mask
|= AC_ERR_HSM
;
3637 ap
->hsm_task_state
= HSM_ST_ERR
;
3645 static void ata_pio_error(struct ata_port
*ap
)
3647 struct ata_queued_cmd
*qc
;
3649 qc
= ata_qc_from_tag(ap
, ap
->active_tag
);
3650 WARN_ON(qc
== NULL
);
3652 if (qc
->tf
.command
!= ATA_CMD_PACKET
)
3653 printk(KERN_WARNING
"ata%u: PIO error\n", ap
->id
);
3655 /* make sure qc->err_mask is available to
3656 * know what's wrong and recover
3658 WARN_ON(qc
->err_mask
== 0);
3660 ap
->hsm_task_state
= HSM_ST_IDLE
;
3662 ata_poll_qc_complete(qc
);
3665 static void ata_pio_task(void *_data
)
3667 struct ata_port
*ap
= _data
;
3668 unsigned long timeout
;
3675 switch (ap
->hsm_task_state
) {
3684 qc_completed
= ata_pio_complete(ap
);
3688 case HSM_ST_LAST_POLL
:
3689 timeout
= ata_pio_poll(ap
);
3699 ata_port_queue_task(ap
, ata_pio_task
, ap
, timeout
);
3700 else if (!qc_completed
)
3705 * atapi_packet_task - Write CDB bytes to hardware
3706 * @_data: Port to which ATAPI device is attached.
3708 * When device has indicated its readiness to accept
3709 * a CDB, this function is called. Send the CDB.
3710 * If DMA is to be performed, exit immediately.
3711 * Otherwise, we are in polling mode, so poll
3712 * status under operation succeeds or fails.
3715 * Kernel thread context (may sleep)
3718 static void atapi_packet_task(void *_data
)
3720 struct ata_port
*ap
= _data
;
3721 struct ata_queued_cmd
*qc
;
3724 qc
= ata_qc_from_tag(ap
, ap
->active_tag
);
3725 WARN_ON(qc
== NULL
);
3726 WARN_ON(!(qc
->flags
& ATA_QCFLAG_ACTIVE
));
3728 /* sleep-wait for BSY to clear */
3729 DPRINTK("busy wait\n");
3730 if (ata_busy_sleep(ap
, ATA_TMOUT_CDB_QUICK
, ATA_TMOUT_CDB
)) {
3731 qc
->err_mask
|= AC_ERR_TIMEOUT
;
3735 /* make sure DRQ is set */
3736 status
= ata_chk_status(ap
);
3737 if ((status
& (ATA_BUSY
| ATA_DRQ
)) != ATA_DRQ
) {
3738 qc
->err_mask
|= AC_ERR_HSM
;
3743 DPRINTK("send cdb\n");
3744 WARN_ON(qc
->dev
->cdb_len
< 12);
3746 if (qc
->tf
.protocol
== ATA_PROT_ATAPI_DMA
||
3747 qc
->tf
.protocol
== ATA_PROT_ATAPI_NODATA
) {
3748 unsigned long flags
;
3750 /* Once we're done issuing command and kicking bmdma,
3751 * irq handler takes over. To not lose irq, we need
3752 * to clear NOINTR flag before sending cdb, but
3753 * interrupt handler shouldn't be invoked before we're
3754 * finished. Hence, the following locking.
3756 spin_lock_irqsave(&ap
->host_set
->lock
, flags
);
3757 ap
->flags
&= ~ATA_FLAG_NOINTR
;
3758 ata_data_xfer(ap
, qc
->cdb
, qc
->dev
->cdb_len
, 1);
3759 if (qc
->tf
.protocol
== ATA_PROT_ATAPI_DMA
)
3760 ap
->ops
->bmdma_start(qc
); /* initiate bmdma */
3761 spin_unlock_irqrestore(&ap
->host_set
->lock
, flags
);
3763 ata_data_xfer(ap
, qc
->cdb
, qc
->dev
->cdb_len
, 1);
3765 /* PIO commands are handled by polling */
3766 ap
->hsm_task_state
= HSM_ST
;
3767 ata_port_queue_task(ap
, ata_pio_task
, ap
, 0);
3773 ata_poll_qc_complete(qc
);
3777 * ata_qc_timeout - Handle timeout of queued command
3778 * @qc: Command that timed out
3780 * Some part of the kernel (currently, only the SCSI layer)
3781 * has noticed that the active command on port @ap has not
3782 * completed after a specified length of time. Handle this
3783 * condition by disabling DMA (if necessary) and completing
3784 * transactions, with error if necessary.
3786 * This also handles the case of the "lost interrupt", where
3787 * for some reason (possibly hardware bug, possibly driver bug)
3788 * an interrupt was not delivered to the driver, even though the
3789 * transaction completed successfully.
3792 * Inherited from SCSI layer (none, can sleep)
3795 static void ata_qc_timeout(struct ata_queued_cmd
*qc
)
3797 struct ata_port
*ap
= qc
->ap
;
3798 struct ata_host_set
*host_set
= ap
->host_set
;
3799 u8 host_stat
= 0, drv_stat
;
3800 unsigned long flags
;
3804 ap
->hsm_task_state
= HSM_ST_IDLE
;
3806 spin_lock_irqsave(&host_set
->lock
, flags
);
3808 switch (qc
->tf
.protocol
) {
3811 case ATA_PROT_ATAPI_DMA
:
3812 host_stat
= ap
->ops
->bmdma_status(ap
);
3814 /* before we do anything else, clear DMA-Start bit */
3815 ap
->ops
->bmdma_stop(qc
);
3821 drv_stat
= ata_chk_status(ap
);
3823 /* ack bmdma irq events */
3824 ap
->ops
->irq_clear(ap
);
3826 printk(KERN_ERR
"ata%u: command 0x%x timeout, stat 0x%x host_stat 0x%x\n",
3827 ap
->id
, qc
->tf
.command
, drv_stat
, host_stat
);
3829 /* complete taskfile transaction */
3830 qc
->err_mask
|= ac_err_mask(drv_stat
);
3834 spin_unlock_irqrestore(&host_set
->lock
, flags
);
3836 ata_eh_qc_complete(qc
);
3842 * ata_eng_timeout - Handle timeout of queued command
3843 * @ap: Port on which timed-out command is active
3845 * Some part of the kernel (currently, only the SCSI layer)
3846 * has noticed that the active command on port @ap has not
3847 * completed after a specified length of time. Handle this
3848 * condition by disabling DMA (if necessary) and completing
3849 * transactions, with error if necessary.
3851 * This also handles the case of the "lost interrupt", where
3852 * for some reason (possibly hardware bug, possibly driver bug)
3853 * an interrupt was not delivered to the driver, even though the
3854 * transaction completed successfully.
3857 * Inherited from SCSI layer (none, can sleep)
3860 void ata_eng_timeout(struct ata_port
*ap
)
3864 ata_qc_timeout(ata_qc_from_tag(ap
, ap
->active_tag
));
3870 * ata_qc_new - Request an available ATA command, for queueing
3871 * @ap: Port associated with device @dev
3872 * @dev: Device from whom we request an available command structure
3878 static struct ata_queued_cmd
*ata_qc_new(struct ata_port
*ap
)
3880 struct ata_queued_cmd
*qc
= NULL
;
3883 for (i
= 0; i
< ATA_MAX_QUEUE
; i
++)
3884 if (!test_and_set_bit(i
, &ap
->qactive
)) {
3885 qc
= ata_qc_from_tag(ap
, i
);
3896 * ata_qc_new_init - Request an available ATA command, and initialize it
3897 * @ap: Port associated with device @dev
3898 * @dev: Device from whom we request an available command structure
3904 struct ata_queued_cmd
*ata_qc_new_init(struct ata_port
*ap
,
3905 struct ata_device
*dev
)
3907 struct ata_queued_cmd
*qc
;
3909 qc
= ata_qc_new(ap
);
3922 * ata_qc_free - free unused ata_queued_cmd
3923 * @qc: Command to complete
3925 * Designed to free unused ata_queued_cmd object
3926 * in case something prevents using it.
3929 * spin_lock_irqsave(host_set lock)
3931 void ata_qc_free(struct ata_queued_cmd
*qc
)
3933 struct ata_port
*ap
= qc
->ap
;
3936 WARN_ON(qc
== NULL
); /* ata_qc_from_tag _might_ return NULL */
3940 if (likely(ata_tag_valid(tag
))) {
3941 if (tag
== ap
->active_tag
)
3942 ap
->active_tag
= ATA_TAG_POISON
;
3943 qc
->tag
= ATA_TAG_POISON
;
3944 clear_bit(tag
, &ap
->qactive
);
3948 void __ata_qc_complete(struct ata_queued_cmd
*qc
)
3950 WARN_ON(qc
== NULL
); /* ata_qc_from_tag _might_ return NULL */
3951 WARN_ON(!(qc
->flags
& ATA_QCFLAG_ACTIVE
));
3953 if (likely(qc
->flags
& ATA_QCFLAG_DMAMAP
))
3956 /* atapi: mark qc as inactive to prevent the interrupt handler
3957 * from completing the command twice later, before the error handler
3958 * is called. (when rc != 0 and atapi request sense is needed)
3960 qc
->flags
&= ~ATA_QCFLAG_ACTIVE
;
3962 /* call completion callback */
3963 qc
->complete_fn(qc
);
3966 static inline int ata_should_dma_map(struct ata_queued_cmd
*qc
)
3968 struct ata_port
*ap
= qc
->ap
;
3970 switch (qc
->tf
.protocol
) {
3972 case ATA_PROT_ATAPI_DMA
:
3975 case ATA_PROT_ATAPI
:
3977 if (ap
->flags
& ATA_FLAG_PIO_DMA
)
3990 * ata_qc_issue - issue taskfile to device
3991 * @qc: command to issue to device
3993 * Prepare an ATA command to submission to device.
3994 * This includes mapping the data into a DMA-able
3995 * area, filling in the S/G table, and finally
3996 * writing the taskfile to hardware, starting the command.
3999 * spin_lock_irqsave(host_set lock)
4002 * Zero on success, AC_ERR_* mask on failure
4005 unsigned int ata_qc_issue(struct ata_queued_cmd
*qc
)
4007 struct ata_port
*ap
= qc
->ap
;
4009 if (ata_should_dma_map(qc
)) {
4010 if (qc
->flags
& ATA_QCFLAG_SG
) {
4011 if (ata_sg_setup(qc
))
4013 } else if (qc
->flags
& ATA_QCFLAG_SINGLE
) {
4014 if (ata_sg_setup_one(qc
))
4018 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
4021 ap
->ops
->qc_prep(qc
);
4023 qc
->ap
->active_tag
= qc
->tag
;
4024 qc
->flags
|= ATA_QCFLAG_ACTIVE
;
4026 return ap
->ops
->qc_issue(qc
);
4029 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
4030 return AC_ERR_SYSTEM
;
4035 * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner
4036 * @qc: command to issue to device
4038 * Using various libata functions and hooks, this function
4039 * starts an ATA command. ATA commands are grouped into
4040 * classes called "protocols", and issuing each type of protocol
4041 * is slightly different.
4043 * May be used as the qc_issue() entry in ata_port_operations.
4046 * spin_lock_irqsave(host_set lock)
4049 * Zero on success, AC_ERR_* mask on failure
4052 unsigned int ata_qc_issue_prot(struct ata_queued_cmd
*qc
)
4054 struct ata_port
*ap
= qc
->ap
;
4056 ata_dev_select(ap
, qc
->dev
->devno
, 1, 0);
4058 switch (qc
->tf
.protocol
) {
4059 case ATA_PROT_NODATA
:
4060 ata_tf_to_host(ap
, &qc
->tf
);
4064 ap
->ops
->tf_load(ap
, &qc
->tf
); /* load tf registers */
4065 ap
->ops
->bmdma_setup(qc
); /* set up bmdma */
4066 ap
->ops
->bmdma_start(qc
); /* initiate bmdma */
4069 case ATA_PROT_PIO
: /* load tf registers, initiate polling pio */
4070 ata_qc_set_polling(qc
);
4071 ata_tf_to_host(ap
, &qc
->tf
);
4072 ap
->hsm_task_state
= HSM_ST
;
4073 ata_port_queue_task(ap
, ata_pio_task
, ap
, 0);
4076 case ATA_PROT_ATAPI
:
4077 ata_qc_set_polling(qc
);
4078 ata_tf_to_host(ap
, &qc
->tf
);
4079 ata_port_queue_task(ap
, atapi_packet_task
, ap
, 0);
4082 case ATA_PROT_ATAPI_NODATA
:
4083 ap
->flags
|= ATA_FLAG_NOINTR
;
4084 ata_tf_to_host(ap
, &qc
->tf
);
4085 ata_port_queue_task(ap
, atapi_packet_task
, ap
, 0);
4088 case ATA_PROT_ATAPI_DMA
:
4089 ap
->flags
|= ATA_FLAG_NOINTR
;
4090 ap
->ops
->tf_load(ap
, &qc
->tf
); /* load tf registers */
4091 ap
->ops
->bmdma_setup(qc
); /* set up bmdma */
4092 ata_port_queue_task(ap
, atapi_packet_task
, ap
, 0);
4097 return AC_ERR_SYSTEM
;
4104 * ata_host_intr - Handle host interrupt for given (port, task)
4105 * @ap: Port on which interrupt arrived (possibly...)
4106 * @qc: Taskfile currently active in engine
4108 * Handle host interrupt for given queued command. Currently,
4109 * only DMA interrupts are handled. All other commands are
4110 * handled via polling with interrupts disabled (nIEN bit).
4113 * spin_lock_irqsave(host_set lock)
4116 * One if interrupt was handled, zero if not (shared irq).
4119 inline unsigned int ata_host_intr (struct ata_port
*ap
,
4120 struct ata_queued_cmd
*qc
)
4122 u8 status
, host_stat
;
4124 switch (qc
->tf
.protocol
) {
4127 case ATA_PROT_ATAPI_DMA
:
4128 case ATA_PROT_ATAPI
:
4129 /* check status of DMA engine */
4130 host_stat
= ap
->ops
->bmdma_status(ap
);
4131 VPRINTK("ata%u: host_stat 0x%X\n", ap
->id
, host_stat
);
4133 /* if it's not our irq... */
4134 if (!(host_stat
& ATA_DMA_INTR
))
4137 /* before we do anything else, clear DMA-Start bit */
4138 ap
->ops
->bmdma_stop(qc
);
4142 case ATA_PROT_ATAPI_NODATA
:
4143 case ATA_PROT_NODATA
:
4144 /* check altstatus */
4145 status
= ata_altstatus(ap
);
4146 if (status
& ATA_BUSY
)
4149 /* check main status, clearing INTRQ */
4150 status
= ata_chk_status(ap
);
4151 if (unlikely(status
& ATA_BUSY
))
4153 DPRINTK("ata%u: protocol %d (dev_stat 0x%X)\n",
4154 ap
->id
, qc
->tf
.protocol
, status
);
4156 /* ack bmdma irq events */
4157 ap
->ops
->irq_clear(ap
);
4159 /* complete taskfile transaction */
4160 qc
->err_mask
|= ac_err_mask(status
);
4161 ata_qc_complete(qc
);
4168 return 1; /* irq handled */
4171 ap
->stats
.idle_irq
++;
4174 if ((ap
->stats
.idle_irq
% 1000) == 0) {
4175 ata_irq_ack(ap
, 0); /* debug trap */
4176 printk(KERN_WARNING
"ata%d: irq trap\n", ap
->id
);
4180 return 0; /* irq not handled */
4184 * ata_interrupt - Default ATA host interrupt handler
4185 * @irq: irq line (unused)
4186 * @dev_instance: pointer to our ata_host_set information structure
4189 * Default interrupt handler for PCI IDE devices. Calls
4190 * ata_host_intr() for each port that is not disabled.
4193 * Obtains host_set lock during operation.
4196 * IRQ_NONE or IRQ_HANDLED.
4199 irqreturn_t
ata_interrupt (int irq
, void *dev_instance
, struct pt_regs
*regs
)
4201 struct ata_host_set
*host_set
= dev_instance
;
4203 unsigned int handled
= 0;
4204 unsigned long flags
;
4206 /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */
4207 spin_lock_irqsave(&host_set
->lock
, flags
);
4209 for (i
= 0; i
< host_set
->n_ports
; i
++) {
4210 struct ata_port
*ap
;
4212 ap
= host_set
->ports
[i
];
4214 !(ap
->flags
& (ATA_FLAG_PORT_DISABLED
| ATA_FLAG_NOINTR
))) {
4215 struct ata_queued_cmd
*qc
;
4217 qc
= ata_qc_from_tag(ap
, ap
->active_tag
);
4218 if (qc
&& (!(qc
->tf
.ctl
& ATA_NIEN
)) &&
4219 (qc
->flags
& ATA_QCFLAG_ACTIVE
))
4220 handled
|= ata_host_intr(ap
, qc
);
4224 spin_unlock_irqrestore(&host_set
->lock
, flags
);
4226 return IRQ_RETVAL(handled
);
4231 * Execute a 'simple' command, that only consists of the opcode 'cmd' itself,
4232 * without filling any other registers
4234 static int ata_do_simple_cmd(struct ata_port
*ap
, struct ata_device
*dev
,
4237 struct ata_taskfile tf
;
4240 ata_tf_init(ap
, &tf
, dev
->devno
);
4243 tf
.flags
|= ATA_TFLAG_DEVICE
;
4244 tf
.protocol
= ATA_PROT_NODATA
;
4246 err
= ata_exec_internal(ap
, dev
, &tf
, DMA_NONE
, NULL
, 0);
4248 printk(KERN_ERR
"%s: ata command failed: %d\n",
4254 static int ata_flush_cache(struct ata_port
*ap
, struct ata_device
*dev
)
4258 if (!ata_try_flush_cache(dev
))
4261 if (ata_id_has_flush_ext(dev
->id
))
4262 cmd
= ATA_CMD_FLUSH_EXT
;
4264 cmd
= ATA_CMD_FLUSH
;
4266 return ata_do_simple_cmd(ap
, dev
, cmd
);
4269 static int ata_standby_drive(struct ata_port
*ap
, struct ata_device
*dev
)
4271 return ata_do_simple_cmd(ap
, dev
, ATA_CMD_STANDBYNOW1
);
4274 static int ata_start_drive(struct ata_port
*ap
, struct ata_device
*dev
)
4276 return ata_do_simple_cmd(ap
, dev
, ATA_CMD_IDLEIMMEDIATE
);
4280 * ata_device_resume - wakeup a previously suspended devices
4281 * @ap: port the device is connected to
4282 * @dev: the device to resume
4284 * Kick the drive back into action, by sending it an idle immediate
4285 * command and making sure its transfer mode matches between drive
4289 int ata_device_resume(struct ata_port
*ap
, struct ata_device
*dev
)
4291 if (ap
->flags
& ATA_FLAG_SUSPENDED
) {
4292 ap
->flags
&= ~ATA_FLAG_SUSPENDED
;
4295 if (!ata_dev_present(dev
))
4297 if (dev
->class == ATA_DEV_ATA
)
4298 ata_start_drive(ap
, dev
);
4304 * ata_device_suspend - prepare a device for suspend
4305 * @ap: port the device is connected to
4306 * @dev: the device to suspend
4308 * Flush the cache on the drive, if appropriate, then issue a
4309 * standbynow command.
4311 int ata_device_suspend(struct ata_port
*ap
, struct ata_device
*dev
, pm_message_t state
)
4313 if (!ata_dev_present(dev
))
4315 if (dev
->class == ATA_DEV_ATA
)
4316 ata_flush_cache(ap
, dev
);
4318 if (state
.event
!= PM_EVENT_FREEZE
)
4319 ata_standby_drive(ap
, dev
);
4320 ap
->flags
|= ATA_FLAG_SUSPENDED
;
4325 * ata_port_start - Set port up for dma.
4326 * @ap: Port to initialize
4328 * Called just after data structures for each port are
4329 * initialized. Allocates space for PRD table.
4331 * May be used as the port_start() entry in ata_port_operations.
4334 * Inherited from caller.
4337 int ata_port_start (struct ata_port
*ap
)
4339 struct device
*dev
= ap
->dev
;
4342 ap
->prd
= dma_alloc_coherent(dev
, ATA_PRD_TBL_SZ
, &ap
->prd_dma
, GFP_KERNEL
);
4346 rc
= ata_pad_alloc(ap
, dev
);
4348 dma_free_coherent(dev
, ATA_PRD_TBL_SZ
, ap
->prd
, ap
->prd_dma
);
4352 DPRINTK("prd alloc, virt %p, dma %llx\n", ap
->prd
, (unsigned long long) ap
->prd_dma
);
4359 * ata_port_stop - Undo ata_port_start()
4360 * @ap: Port to shut down
4362 * Frees the PRD table.
4364 * May be used as the port_stop() entry in ata_port_operations.
4367 * Inherited from caller.
4370 void ata_port_stop (struct ata_port
*ap
)
4372 struct device
*dev
= ap
->dev
;
4374 dma_free_coherent(dev
, ATA_PRD_TBL_SZ
, ap
->prd
, ap
->prd_dma
);
4375 ata_pad_free(ap
, dev
);
4378 void ata_host_stop (struct ata_host_set
*host_set
)
4380 if (host_set
->mmio_base
)
4381 iounmap(host_set
->mmio_base
);
4386 * ata_host_remove - Unregister SCSI host structure with upper layers
4387 * @ap: Port to unregister
4388 * @do_unregister: 1 if we fully unregister, 0 to just stop the port
4391 * Inherited from caller.
4394 static void ata_host_remove(struct ata_port
*ap
, unsigned int do_unregister
)
4396 struct Scsi_Host
*sh
= ap
->host
;
4401 scsi_remove_host(sh
);
4403 ap
->ops
->port_stop(ap
);
4407 * ata_host_init - Initialize an ata_port structure
4408 * @ap: Structure to initialize
4409 * @host: associated SCSI mid-layer structure
4410 * @host_set: Collection of hosts to which @ap belongs
4411 * @ent: Probe information provided by low-level driver
4412 * @port_no: Port number associated with this ata_port
4414 * Initialize a new ata_port structure, and its associated
4418 * Inherited from caller.
4421 static void ata_host_init(struct ata_port
*ap
, struct Scsi_Host
*host
,
4422 struct ata_host_set
*host_set
,
4423 const struct ata_probe_ent
*ent
, unsigned int port_no
)
4429 host
->max_channel
= 1;
4430 host
->unique_id
= ata_unique_id
++;
4431 host
->max_cmd_len
= 12;
4433 ap
->flags
= ATA_FLAG_PORT_DISABLED
;
4434 ap
->id
= host
->unique_id
;
4436 ap
->ctl
= ATA_DEVCTL_OBS
;
4437 ap
->host_set
= host_set
;
4439 ap
->port_no
= port_no
;
4441 ent
->legacy_mode
? ent
->hard_port_no
: port_no
;
4442 ap
->pio_mask
= ent
->pio_mask
;
4443 ap
->mwdma_mask
= ent
->mwdma_mask
;
4444 ap
->udma_mask
= ent
->udma_mask
;
4445 ap
->flags
|= ent
->host_flags
;
4446 ap
->ops
= ent
->port_ops
;
4447 ap
->cbl
= ATA_CBL_NONE
;
4448 ap
->active_tag
= ATA_TAG_POISON
;
4449 ap
->last_ctl
= 0xFF;
4451 INIT_WORK(&ap
->port_task
, NULL
, NULL
);
4452 INIT_LIST_HEAD(&ap
->eh_done_q
);
4454 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
4455 struct ata_device
*dev
= &ap
->device
[i
];
4457 dev
->pio_mask
= UINT_MAX
;
4458 dev
->mwdma_mask
= UINT_MAX
;
4459 dev
->udma_mask
= UINT_MAX
;
4463 ap
->stats
.unhandled_irq
= 1;
4464 ap
->stats
.idle_irq
= 1;
4467 memcpy(&ap
->ioaddr
, &ent
->port
[port_no
], sizeof(struct ata_ioports
));
4471 * ata_host_add - Attach low-level ATA driver to system
4472 * @ent: Information provided by low-level driver
4473 * @host_set: Collections of ports to which we add
4474 * @port_no: Port number associated with this host
4476 * Attach low-level ATA driver to system.
4479 * PCI/etc. bus probe sem.
4482 * New ata_port on success, for NULL on error.
4485 static struct ata_port
* ata_host_add(const struct ata_probe_ent
*ent
,
4486 struct ata_host_set
*host_set
,
4487 unsigned int port_no
)
4489 struct Scsi_Host
*host
;
4490 struct ata_port
*ap
;
4495 if (!ent
->port_ops
->probe_reset
&&
4496 !(ent
->host_flags
& (ATA_FLAG_SATA_RESET
| ATA_FLAG_SRST
))) {
4497 printk(KERN_ERR
"ata%u: no reset mechanism available\n",
4502 host
= scsi_host_alloc(ent
->sht
, sizeof(struct ata_port
));
4506 host
->transportt
= &ata_scsi_transport_template
;
4508 ap
= (struct ata_port
*) &host
->hostdata
[0];
4510 ata_host_init(ap
, host
, host_set
, ent
, port_no
);
4512 rc
= ap
->ops
->port_start(ap
);
4519 scsi_host_put(host
);
4524 * ata_device_add - Register hardware device with ATA and SCSI layers
4525 * @ent: Probe information describing hardware device to be registered
4527 * This function processes the information provided in the probe
4528 * information struct @ent, allocates the necessary ATA and SCSI
4529 * host information structures, initializes them, and registers
4530 * everything with requisite kernel subsystems.
4532 * This function requests irqs, probes the ATA bus, and probes
4536 * PCI/etc. bus probe sem.
4539 * Number of ports registered. Zero on error (no ports registered).
4542 int ata_device_add(const struct ata_probe_ent
*ent
)
4544 unsigned int count
= 0, i
;
4545 struct device
*dev
= ent
->dev
;
4546 struct ata_host_set
*host_set
;
4549 /* alloc a container for our list of ATA ports (buses) */
4550 host_set
= kzalloc(sizeof(struct ata_host_set
) +
4551 (ent
->n_ports
* sizeof(void *)), GFP_KERNEL
);
4554 spin_lock_init(&host_set
->lock
);
4556 host_set
->dev
= dev
;
4557 host_set
->n_ports
= ent
->n_ports
;
4558 host_set
->irq
= ent
->irq
;
4559 host_set
->mmio_base
= ent
->mmio_base
;
4560 host_set
->private_data
= ent
->private_data
;
4561 host_set
->ops
= ent
->port_ops
;
4562 host_set
->flags
= ent
->host_set_flags
;
4564 /* register each port bound to this device */
4565 for (i
= 0; i
< ent
->n_ports
; i
++) {
4566 struct ata_port
*ap
;
4567 unsigned long xfer_mode_mask
;
4569 ap
= ata_host_add(ent
, host_set
, i
);
4573 host_set
->ports
[i
] = ap
;
4574 xfer_mode_mask
=(ap
->udma_mask
<< ATA_SHIFT_UDMA
) |
4575 (ap
->mwdma_mask
<< ATA_SHIFT_MWDMA
) |
4576 (ap
->pio_mask
<< ATA_SHIFT_PIO
);
4578 /* print per-port info to dmesg */
4579 printk(KERN_INFO
"ata%u: %cATA max %s cmd 0x%lX ctl 0x%lX "
4580 "bmdma 0x%lX irq %lu\n",
4582 ap
->flags
& ATA_FLAG_SATA
? 'S' : 'P',
4583 ata_mode_string(xfer_mode_mask
),
4584 ap
->ioaddr
.cmd_addr
,
4585 ap
->ioaddr
.ctl_addr
,
4586 ap
->ioaddr
.bmdma_addr
,
4590 host_set
->ops
->irq_clear(ap
);
4597 /* obtain irq, that is shared between channels */
4598 if (request_irq(ent
->irq
, ent
->port_ops
->irq_handler
, ent
->irq_flags
,
4599 DRV_NAME
, host_set
))
4602 /* perform each probe synchronously */
4603 DPRINTK("probe begin\n");
4604 for (i
= 0; i
< count
; i
++) {
4605 struct ata_port
*ap
;
4608 ap
= host_set
->ports
[i
];
4610 DPRINTK("ata%u: bus probe begin\n", ap
->id
);
4611 rc
= ata_bus_probe(ap
);
4612 DPRINTK("ata%u: bus probe end\n", ap
->id
);
4615 /* FIXME: do something useful here?
4616 * Current libata behavior will
4617 * tear down everything when
4618 * the module is removed
4619 * or the h/w is unplugged.
4623 rc
= scsi_add_host(ap
->host
, dev
);
4625 printk(KERN_ERR
"ata%u: scsi_add_host failed\n",
4627 /* FIXME: do something useful here */
4628 /* FIXME: handle unconditional calls to
4629 * scsi_scan_host and ata_host_remove, below,
4635 /* probes are done, now scan each port's disk(s) */
4636 DPRINTK("host probe begin\n");
4637 for (i
= 0; i
< count
; i
++) {
4638 struct ata_port
*ap
= host_set
->ports
[i
];
4640 ata_scsi_scan_host(ap
);
4643 dev_set_drvdata(dev
, host_set
);
4645 VPRINTK("EXIT, returning %u\n", ent
->n_ports
);
4646 return ent
->n_ports
; /* success */
4649 for (i
= 0; i
< count
; i
++) {
4650 ata_host_remove(host_set
->ports
[i
], 1);
4651 scsi_host_put(host_set
->ports
[i
]->host
);
4655 VPRINTK("EXIT, returning 0\n");
4660 * ata_host_set_remove - PCI layer callback for device removal
4661 * @host_set: ATA host set that was removed
4663 * Unregister all objects associated with this host set. Free those
4667 * Inherited from calling layer (may sleep).
4670 void ata_host_set_remove(struct ata_host_set
*host_set
)
4672 struct ata_port
*ap
;
4675 for (i
= 0; i
< host_set
->n_ports
; i
++) {
4676 ap
= host_set
->ports
[i
];
4677 scsi_remove_host(ap
->host
);
4680 free_irq(host_set
->irq
, host_set
);
4682 for (i
= 0; i
< host_set
->n_ports
; i
++) {
4683 ap
= host_set
->ports
[i
];
4685 ata_scsi_release(ap
->host
);
4687 if ((ap
->flags
& ATA_FLAG_NO_LEGACY
) == 0) {
4688 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
4690 if (ioaddr
->cmd_addr
== 0x1f0)
4691 release_region(0x1f0, 8);
4692 else if (ioaddr
->cmd_addr
== 0x170)
4693 release_region(0x170, 8);
4696 scsi_host_put(ap
->host
);
4699 if (host_set
->ops
->host_stop
)
4700 host_set
->ops
->host_stop(host_set
);
4706 * ata_scsi_release - SCSI layer callback hook for host unload
4707 * @host: libata host to be unloaded
4709 * Performs all duties necessary to shut down a libata port...
4710 * Kill port kthread, disable port, and release resources.
4713 * Inherited from SCSI layer.
4719 int ata_scsi_release(struct Scsi_Host
*host
)
4721 struct ata_port
*ap
= (struct ata_port
*) &host
->hostdata
[0];
4726 ap
->ops
->port_disable(ap
);
4727 ata_host_remove(ap
, 0);
4728 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
4729 kfree(ap
->device
[i
].id
);
4736 * ata_std_ports - initialize ioaddr with standard port offsets.
4737 * @ioaddr: IO address structure to be initialized
4739 * Utility function which initializes data_addr, error_addr,
4740 * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr,
4741 * device_addr, status_addr, and command_addr to standard offsets
4742 * relative to cmd_addr.
4744 * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr.
4747 void ata_std_ports(struct ata_ioports
*ioaddr
)
4749 ioaddr
->data_addr
= ioaddr
->cmd_addr
+ ATA_REG_DATA
;
4750 ioaddr
->error_addr
= ioaddr
->cmd_addr
+ ATA_REG_ERR
;
4751 ioaddr
->feature_addr
= ioaddr
->cmd_addr
+ ATA_REG_FEATURE
;
4752 ioaddr
->nsect_addr
= ioaddr
->cmd_addr
+ ATA_REG_NSECT
;
4753 ioaddr
->lbal_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAL
;
4754 ioaddr
->lbam_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAM
;
4755 ioaddr
->lbah_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAH
;
4756 ioaddr
->device_addr
= ioaddr
->cmd_addr
+ ATA_REG_DEVICE
;
4757 ioaddr
->status_addr
= ioaddr
->cmd_addr
+ ATA_REG_STATUS
;
4758 ioaddr
->command_addr
= ioaddr
->cmd_addr
+ ATA_REG_CMD
;
4764 void ata_pci_host_stop (struct ata_host_set
*host_set
)
4766 struct pci_dev
*pdev
= to_pci_dev(host_set
->dev
);
4768 pci_iounmap(pdev
, host_set
->mmio_base
);
4772 * ata_pci_remove_one - PCI layer callback for device removal
4773 * @pdev: PCI device that was removed
4775 * PCI layer indicates to libata via this hook that
4776 * hot-unplug or module unload event has occurred.
4777 * Handle this by unregistering all objects associated
4778 * with this PCI device. Free those objects. Then finally
4779 * release PCI resources and disable device.
4782 * Inherited from PCI layer (may sleep).
4785 void ata_pci_remove_one (struct pci_dev
*pdev
)
4787 struct device
*dev
= pci_dev_to_dev(pdev
);
4788 struct ata_host_set
*host_set
= dev_get_drvdata(dev
);
4790 ata_host_set_remove(host_set
);
4791 pci_release_regions(pdev
);
4792 pci_disable_device(pdev
);
4793 dev_set_drvdata(dev
, NULL
);
4796 /* move to PCI subsystem */
4797 int pci_test_config_bits(struct pci_dev
*pdev
, const struct pci_bits
*bits
)
4799 unsigned long tmp
= 0;
4801 switch (bits
->width
) {
4804 pci_read_config_byte(pdev
, bits
->reg
, &tmp8
);
4810 pci_read_config_word(pdev
, bits
->reg
, &tmp16
);
4816 pci_read_config_dword(pdev
, bits
->reg
, &tmp32
);
4827 return (tmp
== bits
->val
) ? 1 : 0;
4830 int ata_pci_device_suspend(struct pci_dev
*pdev
, pm_message_t state
)
4832 pci_save_state(pdev
);
4833 pci_disable_device(pdev
);
4834 pci_set_power_state(pdev
, PCI_D3hot
);
4838 int ata_pci_device_resume(struct pci_dev
*pdev
)
4840 pci_set_power_state(pdev
, PCI_D0
);
4841 pci_restore_state(pdev
);
4842 pci_enable_device(pdev
);
4843 pci_set_master(pdev
);
4846 #endif /* CONFIG_PCI */
4849 static int __init
ata_init(void)
4851 ata_wq
= create_workqueue("ata");
4855 printk(KERN_DEBUG
"libata version " DRV_VERSION
" loaded.\n");
4859 static void __exit
ata_exit(void)
4861 destroy_workqueue(ata_wq
);
4864 module_init(ata_init
);
4865 module_exit(ata_exit
);
4867 static unsigned long ratelimit_time
;
4868 static spinlock_t ata_ratelimit_lock
= SPIN_LOCK_UNLOCKED
;
4870 int ata_ratelimit(void)
4873 unsigned long flags
;
4875 spin_lock_irqsave(&ata_ratelimit_lock
, flags
);
4877 if (time_after(jiffies
, ratelimit_time
)) {
4879 ratelimit_time
= jiffies
+ (HZ
/5);
4883 spin_unlock_irqrestore(&ata_ratelimit_lock
, flags
);
4889 * libata is essentially a library of internal helper functions for
4890 * low-level ATA host controller drivers. As such, the API/ABI is
4891 * likely to change as new drivers are added and updated.
4892 * Do not depend on ABI/API stability.
4895 EXPORT_SYMBOL_GPL(ata_std_bios_param
);
4896 EXPORT_SYMBOL_GPL(ata_std_ports
);
4897 EXPORT_SYMBOL_GPL(ata_device_add
);
4898 EXPORT_SYMBOL_GPL(ata_host_set_remove
);
4899 EXPORT_SYMBOL_GPL(ata_sg_init
);
4900 EXPORT_SYMBOL_GPL(ata_sg_init_one
);
4901 EXPORT_SYMBOL_GPL(__ata_qc_complete
);
4902 EXPORT_SYMBOL_GPL(ata_qc_issue_prot
);
4903 EXPORT_SYMBOL_GPL(ata_eng_timeout
);
4904 EXPORT_SYMBOL_GPL(ata_tf_load
);
4905 EXPORT_SYMBOL_GPL(ata_tf_read
);
4906 EXPORT_SYMBOL_GPL(ata_noop_dev_select
);
4907 EXPORT_SYMBOL_GPL(ata_std_dev_select
);
4908 EXPORT_SYMBOL_GPL(ata_tf_to_fis
);
4909 EXPORT_SYMBOL_GPL(ata_tf_from_fis
);
4910 EXPORT_SYMBOL_GPL(ata_check_status
);
4911 EXPORT_SYMBOL_GPL(ata_altstatus
);
4912 EXPORT_SYMBOL_GPL(ata_exec_command
);
4913 EXPORT_SYMBOL_GPL(ata_port_start
);
4914 EXPORT_SYMBOL_GPL(ata_port_stop
);
4915 EXPORT_SYMBOL_GPL(ata_host_stop
);
4916 EXPORT_SYMBOL_GPL(ata_interrupt
);
4917 EXPORT_SYMBOL_GPL(ata_qc_prep
);
4918 EXPORT_SYMBOL_GPL(ata_noop_qc_prep
);
4919 EXPORT_SYMBOL_GPL(ata_bmdma_setup
);
4920 EXPORT_SYMBOL_GPL(ata_bmdma_start
);
4921 EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear
);
4922 EXPORT_SYMBOL_GPL(ata_bmdma_status
);
4923 EXPORT_SYMBOL_GPL(ata_bmdma_stop
);
4924 EXPORT_SYMBOL_GPL(ata_port_probe
);
4925 EXPORT_SYMBOL_GPL(sata_phy_reset
);
4926 EXPORT_SYMBOL_GPL(__sata_phy_reset
);
4927 EXPORT_SYMBOL_GPL(ata_bus_reset
);
4928 EXPORT_SYMBOL_GPL(ata_std_probeinit
);
4929 EXPORT_SYMBOL_GPL(ata_std_softreset
);
4930 EXPORT_SYMBOL_GPL(sata_std_hardreset
);
4931 EXPORT_SYMBOL_GPL(ata_std_postreset
);
4932 EXPORT_SYMBOL_GPL(ata_std_probe_reset
);
4933 EXPORT_SYMBOL_GPL(ata_drive_probe_reset
);
4934 EXPORT_SYMBOL_GPL(ata_dev_revalidate
);
4935 EXPORT_SYMBOL_GPL(ata_dev_classify
);
4936 EXPORT_SYMBOL_GPL(ata_dev_pair
);
4937 EXPORT_SYMBOL_GPL(ata_port_disable
);
4938 EXPORT_SYMBOL_GPL(ata_ratelimit
);
4939 EXPORT_SYMBOL_GPL(ata_busy_sleep
);
4940 EXPORT_SYMBOL_GPL(ata_port_queue_task
);
4941 EXPORT_SYMBOL_GPL(ata_scsi_ioctl
);
4942 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd
);
4943 EXPORT_SYMBOL_GPL(ata_scsi_error
);
4944 EXPORT_SYMBOL_GPL(ata_scsi_slave_config
);
4945 EXPORT_SYMBOL_GPL(ata_scsi_release
);
4946 EXPORT_SYMBOL_GPL(ata_host_intr
);
4947 EXPORT_SYMBOL_GPL(ata_id_string
);
4948 EXPORT_SYMBOL_GPL(ata_id_c_string
);
4949 EXPORT_SYMBOL_GPL(ata_scsi_simulate
);
4950 EXPORT_SYMBOL_GPL(ata_eh_qc_complete
);
4951 EXPORT_SYMBOL_GPL(ata_eh_qc_retry
);
4953 EXPORT_SYMBOL_GPL(ata_pio_need_iordy
);
4954 EXPORT_SYMBOL_GPL(ata_timing_compute
);
4955 EXPORT_SYMBOL_GPL(ata_timing_merge
);
4958 EXPORT_SYMBOL_GPL(pci_test_config_bits
);
4959 EXPORT_SYMBOL_GPL(ata_pci_host_stop
);
4960 EXPORT_SYMBOL_GPL(ata_pci_init_native_mode
);
4961 EXPORT_SYMBOL_GPL(ata_pci_init_one
);
4962 EXPORT_SYMBOL_GPL(ata_pci_remove_one
);
4963 EXPORT_SYMBOL_GPL(ata_pci_device_suspend
);
4964 EXPORT_SYMBOL_GPL(ata_pci_device_resume
);
4965 EXPORT_SYMBOL_GPL(ata_pci_default_filter
);
4966 EXPORT_SYMBOL_GPL(ata_pci_clear_simplex
);
4967 #endif /* CONFIG_PCI */
4969 EXPORT_SYMBOL_GPL(ata_device_suspend
);
4970 EXPORT_SYMBOL_GPL(ata_device_resume
);
4971 EXPORT_SYMBOL_GPL(ata_scsi_device_suspend
);
4972 EXPORT_SYMBOL_GPL(ata_scsi_device_resume
);