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
{
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
;
994 spin_unlock_irqrestore(&ap
->host_set
->lock
, flags
);
996 if (!wait_for_completion_timeout(&wait
, ATA_TMOUT_INTERNAL
)) {
997 ata_port_flush_task(ap
);
999 spin_lock_irqsave(&ap
->host_set
->lock
, flags
);
1001 /* We're racing with irq here. If we lose, the
1002 * following test prevents us from completing the qc
1003 * again. If completion irq occurs after here but
1004 * before the caller cleans up, it will result in a
1005 * spurious interrupt. We can live with that.
1007 if (qc
->flags
& ATA_QCFLAG_ACTIVE
) {
1008 qc
->err_mask
= AC_ERR_TIMEOUT
;
1009 ata_qc_complete(qc
);
1010 printk(KERN_WARNING
"ata%u: qc timeout (cmd 0x%x)\n",
1014 spin_unlock_irqrestore(&ap
->host_set
->lock
, flags
);
1018 err_mask
= qc
->err_mask
;
1022 /* XXX - Some LLDDs (sata_mv) disable port on command failure.
1023 * Until those drivers are fixed, we detect the condition
1024 * here, fail the command with AC_ERR_SYSTEM and reenable the
1027 * Note that this doesn't change any behavior as internal
1028 * command failure results in disabling the device in the
1029 * higher layer for LLDDs without new reset/EH callbacks.
1031 * Kill the following code as soon as those drivers are fixed.
1033 if (ap
->flags
& ATA_FLAG_PORT_DISABLED
) {
1034 err_mask
|= AC_ERR_SYSTEM
;
1042 * ata_pio_need_iordy - check if iordy needed
1045 * Check if the current speed of the device requires IORDY. Used
1046 * by various controllers for chip configuration.
1049 unsigned int ata_pio_need_iordy(const struct ata_device
*adev
)
1052 int speed
= adev
->pio_mode
- XFER_PIO_0
;
1059 /* If we have no drive specific rule, then PIO 2 is non IORDY */
1061 if (adev
->id
[ATA_ID_FIELD_VALID
] & 2) { /* EIDE */
1062 pio
= adev
->id
[ATA_ID_EIDE_PIO
];
1063 /* Is the speed faster than the drive allows non IORDY ? */
1065 /* This is cycle times not frequency - watch the logic! */
1066 if (pio
> 240) /* PIO2 is 240nS per cycle */
1075 * ata_dev_read_id - Read ID data from the specified device
1076 * @ap: port on which target device resides
1077 * @dev: target device
1078 * @p_class: pointer to class of the target device (may be changed)
1079 * @post_reset: is this read ID post-reset?
1080 * @p_id: read IDENTIFY page (newly allocated)
1082 * Read ID data from the specified device. ATA_CMD_ID_ATA is
1083 * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
1084 * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS
1085 * for pre-ATA4 drives.
1088 * Kernel thread context (may sleep)
1091 * 0 on success, -errno otherwise.
1093 static int ata_dev_read_id(struct ata_port
*ap
, struct ata_device
*dev
,
1094 unsigned int *p_class
, int post_reset
, u16
**p_id
)
1096 unsigned int class = *p_class
;
1097 struct ata_taskfile tf
;
1098 unsigned int err_mask
= 0;
1103 DPRINTK("ENTER, host %u, dev %u\n", ap
->id
, dev
->devno
);
1105 ata_dev_select(ap
, dev
->devno
, 1, 1); /* select device 0/1 */
1107 id
= kmalloc(sizeof(id
[0]) * ATA_ID_WORDS
, GFP_KERNEL
);
1110 reason
= "out of memory";
1115 ata_tf_init(ap
, &tf
, dev
->devno
);
1119 tf
.command
= ATA_CMD_ID_ATA
;
1122 tf
.command
= ATA_CMD_ID_ATAPI
;
1126 reason
= "unsupported class";
1130 tf
.protocol
= ATA_PROT_PIO
;
1132 err_mask
= ata_exec_internal(ap
, dev
, &tf
, DMA_FROM_DEVICE
,
1133 id
, sizeof(id
[0]) * ATA_ID_WORDS
);
1136 reason
= "I/O error";
1140 swap_buf_le16(id
, ATA_ID_WORDS
);
1143 if ((class == ATA_DEV_ATA
) != (ata_id_is_ata(id
) | ata_id_is_cfa(id
))) {
1145 reason
= "device reports illegal type";
1149 if (post_reset
&& class == ATA_DEV_ATA
) {
1151 * The exact sequence expected by certain pre-ATA4 drives is:
1154 * INITIALIZE DEVICE PARAMETERS
1156 * Some drives were very specific about that exact sequence.
1158 if (ata_id_major_version(id
) < 4 || !ata_id_has_lba(id
)) {
1159 err_mask
= ata_dev_init_params(ap
, dev
, id
[3], id
[6]);
1162 reason
= "INIT_DEV_PARAMS failed";
1166 /* current CHS translation info (id[53-58]) might be
1167 * changed. reread the identify device info.
1179 printk(KERN_WARNING
"ata%u: dev %u failed to IDENTIFY (%s)\n",
1180 ap
->id
, dev
->devno
, reason
);
1185 static inline u8
ata_dev_knobble(const struct ata_port
*ap
,
1186 struct ata_device
*dev
)
1188 return ((ap
->cbl
== ATA_CBL_SATA
) && (!ata_id_is_sata(dev
->id
)));
1192 * ata_dev_configure - Configure the specified ATA/ATAPI device
1193 * @ap: Port on which target device resides
1194 * @dev: Target device to configure
1195 * @print_info: Enable device info printout
1197 * Configure @dev according to @dev->id. Generic and low-level
1198 * driver specific fixups are also applied.
1201 * Kernel thread context (may sleep)
1204 * 0 on success, -errno otherwise
1206 static int ata_dev_configure(struct ata_port
*ap
, struct ata_device
*dev
,
1209 const u16
*id
= dev
->id
;
1210 unsigned int xfer_mask
;
1213 if (!ata_dev_present(dev
)) {
1214 DPRINTK("ENTER/EXIT (host %u, dev %u) -- nodev\n",
1215 ap
->id
, dev
->devno
);
1219 DPRINTK("ENTER, host %u, dev %u\n", ap
->id
, dev
->devno
);
1221 /* print device capabilities */
1223 printk(KERN_DEBUG
"ata%u: dev %u cfg 49:%04x 82:%04x 83:%04x "
1224 "84:%04x 85:%04x 86:%04x 87:%04x 88:%04x\n",
1225 ap
->id
, dev
->devno
, id
[49], id
[82], id
[83],
1226 id
[84], id
[85], id
[86], id
[87], id
[88]);
1228 /* initialize to-be-configured parameters */
1230 dev
->max_sectors
= 0;
1238 * common ATA, ATAPI feature tests
1241 /* find max transfer mode; for printk only */
1242 xfer_mask
= ata_id_xfermask(id
);
1246 /* ATA-specific feature tests */
1247 if (dev
->class == ATA_DEV_ATA
) {
1248 dev
->n_sectors
= ata_id_n_sectors(id
);
1250 if (ata_id_has_lba(id
)) {
1251 const char *lba_desc
;
1254 dev
->flags
|= ATA_DFLAG_LBA
;
1255 if (ata_id_has_lba48(id
)) {
1256 dev
->flags
|= ATA_DFLAG_LBA48
;
1260 /* print device info to dmesg */
1262 printk(KERN_INFO
"ata%u: dev %u ATA-%d, "
1263 "max %s, %Lu sectors: %s\n",
1265 ata_id_major_version(id
),
1266 ata_mode_string(xfer_mask
),
1267 (unsigned long long)dev
->n_sectors
,
1272 /* Default translation */
1273 dev
->cylinders
= id
[1];
1275 dev
->sectors
= id
[6];
1277 if (ata_id_current_chs_valid(id
)) {
1278 /* Current CHS translation is valid. */
1279 dev
->cylinders
= id
[54];
1280 dev
->heads
= id
[55];
1281 dev
->sectors
= id
[56];
1284 /* print device info to dmesg */
1286 printk(KERN_INFO
"ata%u: dev %u ATA-%d, "
1287 "max %s, %Lu sectors: CHS %u/%u/%u\n",
1289 ata_id_major_version(id
),
1290 ata_mode_string(xfer_mask
),
1291 (unsigned long long)dev
->n_sectors
,
1292 dev
->cylinders
, dev
->heads
, dev
->sectors
);
1298 /* ATAPI-specific feature tests */
1299 else if (dev
->class == ATA_DEV_ATAPI
) {
1300 rc
= atapi_cdb_len(id
);
1301 if ((rc
< 12) || (rc
> ATAPI_CDB_LEN
)) {
1302 printk(KERN_WARNING
"ata%u: unsupported CDB len\n", ap
->id
);
1306 dev
->cdb_len
= (unsigned int) rc
;
1308 /* print device info to dmesg */
1310 printk(KERN_INFO
"ata%u: dev %u ATAPI, max %s\n",
1311 ap
->id
, dev
->devno
, ata_mode_string(xfer_mask
));
1314 ap
->host
->max_cmd_len
= 0;
1315 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
1316 ap
->host
->max_cmd_len
= max_t(unsigned int,
1317 ap
->host
->max_cmd_len
,
1318 ap
->device
[i
].cdb_len
);
1320 /* limit bridge transfers to udma5, 200 sectors */
1321 if (ata_dev_knobble(ap
, dev
)) {
1323 printk(KERN_INFO
"ata%u(%u): applying bridge limits\n",
1324 ap
->id
, dev
->devno
);
1325 dev
->udma_mask
&= ATA_UDMA5
;
1326 dev
->max_sectors
= ATA_MAX_SECTORS
;
1329 if (ap
->ops
->dev_config
)
1330 ap
->ops
->dev_config(ap
, dev
);
1332 DPRINTK("EXIT, drv_stat = 0x%x\n", ata_chk_status(ap
));
1336 DPRINTK("EXIT, err\n");
1341 * ata_bus_probe - Reset and probe ATA bus
1344 * Master ATA bus probing function. Initiates a hardware-dependent
1345 * bus reset, then attempts to identify any devices found on
1349 * PCI/etc. bus probe sem.
1352 * Zero on success, non-zero on error.
1355 static int ata_bus_probe(struct ata_port
*ap
)
1357 unsigned int classes
[ATA_MAX_DEVICES
];
1358 unsigned int i
, rc
, found
= 0;
1362 /* reset and determine device classes */
1363 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
1364 classes
[i
] = ATA_DEV_UNKNOWN
;
1366 if (ap
->ops
->probe_reset
) {
1367 rc
= ap
->ops
->probe_reset(ap
, classes
);
1369 printk("ata%u: reset failed (errno=%d)\n", ap
->id
, rc
);
1373 ap
->ops
->phy_reset(ap
);
1375 if (!(ap
->flags
& ATA_FLAG_PORT_DISABLED
))
1376 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
1377 classes
[i
] = ap
->device
[i
].class;
1382 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
1383 if (classes
[i
] == ATA_DEV_UNKNOWN
)
1384 classes
[i
] = ATA_DEV_NONE
;
1386 /* read IDENTIFY page and configure devices */
1387 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
1388 struct ata_device
*dev
= &ap
->device
[i
];
1390 dev
->class = classes
[i
];
1392 if (!ata_dev_present(dev
))
1395 WARN_ON(dev
->id
!= NULL
);
1396 if (ata_dev_read_id(ap
, dev
, &dev
->class, 1, &dev
->id
)) {
1397 dev
->class = ATA_DEV_NONE
;
1401 if (ata_dev_configure(ap
, dev
, 1)) {
1402 ata_dev_disable(ap
, dev
);
1410 goto err_out_disable
;
1412 if (ap
->ops
->set_mode
)
1413 ap
->ops
->set_mode(ap
);
1417 if (ap
->flags
& ATA_FLAG_PORT_DISABLED
)
1418 goto err_out_disable
;
1423 ap
->ops
->port_disable(ap
);
1428 * ata_port_probe - Mark port as enabled
1429 * @ap: Port for which we indicate enablement
1431 * Modify @ap data structure such that the system
1432 * thinks that the entire port is enabled.
1434 * LOCKING: host_set lock, or some other form of
1438 void ata_port_probe(struct ata_port
*ap
)
1440 ap
->flags
&= ~ATA_FLAG_PORT_DISABLED
;
1444 * sata_print_link_status - Print SATA link status
1445 * @ap: SATA port to printk link status about
1447 * This function prints link speed and status of a SATA link.
1452 static void sata_print_link_status(struct ata_port
*ap
)
1457 if (!ap
->ops
->scr_read
)
1460 sstatus
= scr_read(ap
, SCR_STATUS
);
1462 if (sata_dev_present(ap
)) {
1463 tmp
= (sstatus
>> 4) & 0xf;
1466 else if (tmp
& (1 << 1))
1469 speed
= "<unknown>";
1470 printk(KERN_INFO
"ata%u: SATA link up %s Gbps (SStatus %X)\n",
1471 ap
->id
, speed
, sstatus
);
1473 printk(KERN_INFO
"ata%u: SATA link down (SStatus %X)\n",
1479 * __sata_phy_reset - Wake/reset a low-level SATA PHY
1480 * @ap: SATA port associated with target SATA PHY.
1482 * This function issues commands to standard SATA Sxxx
1483 * PHY registers, to wake up the phy (and device), and
1484 * clear any reset condition.
1487 * PCI/etc. bus probe sem.
1490 void __sata_phy_reset(struct ata_port
*ap
)
1493 unsigned long timeout
= jiffies
+ (HZ
* 5);
1495 if (ap
->flags
& ATA_FLAG_SATA_RESET
) {
1496 /* issue phy wake/reset */
1497 scr_write_flush(ap
, SCR_CONTROL
, 0x301);
1498 /* Couldn't find anything in SATA I/II specs, but
1499 * AHCI-1.1 10.4.2 says at least 1 ms. */
1502 scr_write_flush(ap
, SCR_CONTROL
, 0x300); /* phy wake/clear reset */
1504 /* wait for phy to become ready, if necessary */
1507 sstatus
= scr_read(ap
, SCR_STATUS
);
1508 if ((sstatus
& 0xf) != 1)
1510 } while (time_before(jiffies
, timeout
));
1512 /* print link status */
1513 sata_print_link_status(ap
);
1515 /* TODO: phy layer with polling, timeouts, etc. */
1516 if (sata_dev_present(ap
))
1519 ata_port_disable(ap
);
1521 if (ap
->flags
& ATA_FLAG_PORT_DISABLED
)
1524 if (ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
)) {
1525 ata_port_disable(ap
);
1529 ap
->cbl
= ATA_CBL_SATA
;
1533 * sata_phy_reset - Reset SATA bus.
1534 * @ap: SATA port associated with target SATA PHY.
1536 * This function resets the SATA bus, and then probes
1537 * the bus for devices.
1540 * PCI/etc. bus probe sem.
1543 void sata_phy_reset(struct ata_port
*ap
)
1545 __sata_phy_reset(ap
);
1546 if (ap
->flags
& ATA_FLAG_PORT_DISABLED
)
1552 * ata_dev_pair - return other device on cable
1556 * Obtain the other device on the same cable, or if none is
1557 * present NULL is returned
1560 struct ata_device
*ata_dev_pair(struct ata_port
*ap
, struct ata_device
*adev
)
1562 struct ata_device
*pair
= &ap
->device
[1 - adev
->devno
];
1563 if (!ata_dev_present(pair
))
1569 * ata_port_disable - Disable port.
1570 * @ap: Port to be disabled.
1572 * Modify @ap data structure such that the system
1573 * thinks that the entire port is disabled, and should
1574 * never attempt to probe or communicate with devices
1577 * LOCKING: host_set lock, or some other form of
1581 void ata_port_disable(struct ata_port
*ap
)
1583 ap
->device
[0].class = ATA_DEV_NONE
;
1584 ap
->device
[1].class = ATA_DEV_NONE
;
1585 ap
->flags
|= ATA_FLAG_PORT_DISABLED
;
1589 * This mode timing computation functionality is ported over from
1590 * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik
1593 * PIO 0-5, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
1594 * These were taken from ATA/ATAPI-6 standard, rev 0a, except
1595 * for PIO 5, which is a nonstandard extension and UDMA6, which
1596 * is currently supported only by Maxtor drives.
1599 static const struct ata_timing ata_timing
[] = {
1601 { XFER_UDMA_6
, 0, 0, 0, 0, 0, 0, 0, 15 },
1602 { XFER_UDMA_5
, 0, 0, 0, 0, 0, 0, 0, 20 },
1603 { XFER_UDMA_4
, 0, 0, 0, 0, 0, 0, 0, 30 },
1604 { XFER_UDMA_3
, 0, 0, 0, 0, 0, 0, 0, 45 },
1606 { XFER_UDMA_2
, 0, 0, 0, 0, 0, 0, 0, 60 },
1607 { XFER_UDMA_1
, 0, 0, 0, 0, 0, 0, 0, 80 },
1608 { XFER_UDMA_0
, 0, 0, 0, 0, 0, 0, 0, 120 },
1610 /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */
1612 { XFER_MW_DMA_2
, 25, 0, 0, 0, 70, 25, 120, 0 },
1613 { XFER_MW_DMA_1
, 45, 0, 0, 0, 80, 50, 150, 0 },
1614 { XFER_MW_DMA_0
, 60, 0, 0, 0, 215, 215, 480, 0 },
1616 { XFER_SW_DMA_2
, 60, 0, 0, 0, 120, 120, 240, 0 },
1617 { XFER_SW_DMA_1
, 90, 0, 0, 0, 240, 240, 480, 0 },
1618 { XFER_SW_DMA_0
, 120, 0, 0, 0, 480, 480, 960, 0 },
1620 /* { XFER_PIO_5, 20, 50, 30, 100, 50, 30, 100, 0 }, */
1621 { XFER_PIO_4
, 25, 70, 25, 120, 70, 25, 120, 0 },
1622 { XFER_PIO_3
, 30, 80, 70, 180, 80, 70, 180, 0 },
1624 { XFER_PIO_2
, 30, 290, 40, 330, 100, 90, 240, 0 },
1625 { XFER_PIO_1
, 50, 290, 93, 383, 125, 100, 383, 0 },
1626 { XFER_PIO_0
, 70, 290, 240, 600, 165, 150, 600, 0 },
1628 /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */
1633 #define ENOUGH(v,unit) (((v)-1)/(unit)+1)
1634 #define EZ(v,unit) ((v)?ENOUGH(v,unit):0)
1636 static void ata_timing_quantize(const struct ata_timing
*t
, struct ata_timing
*q
, int T
, int UT
)
1638 q
->setup
= EZ(t
->setup
* 1000, T
);
1639 q
->act8b
= EZ(t
->act8b
* 1000, T
);
1640 q
->rec8b
= EZ(t
->rec8b
* 1000, T
);
1641 q
->cyc8b
= EZ(t
->cyc8b
* 1000, T
);
1642 q
->active
= EZ(t
->active
* 1000, T
);
1643 q
->recover
= EZ(t
->recover
* 1000, T
);
1644 q
->cycle
= EZ(t
->cycle
* 1000, T
);
1645 q
->udma
= EZ(t
->udma
* 1000, UT
);
1648 void ata_timing_merge(const struct ata_timing
*a
, const struct ata_timing
*b
,
1649 struct ata_timing
*m
, unsigned int what
)
1651 if (what
& ATA_TIMING_SETUP
) m
->setup
= max(a
->setup
, b
->setup
);
1652 if (what
& ATA_TIMING_ACT8B
) m
->act8b
= max(a
->act8b
, b
->act8b
);
1653 if (what
& ATA_TIMING_REC8B
) m
->rec8b
= max(a
->rec8b
, b
->rec8b
);
1654 if (what
& ATA_TIMING_CYC8B
) m
->cyc8b
= max(a
->cyc8b
, b
->cyc8b
);
1655 if (what
& ATA_TIMING_ACTIVE
) m
->active
= max(a
->active
, b
->active
);
1656 if (what
& ATA_TIMING_RECOVER
) m
->recover
= max(a
->recover
, b
->recover
);
1657 if (what
& ATA_TIMING_CYCLE
) m
->cycle
= max(a
->cycle
, b
->cycle
);
1658 if (what
& ATA_TIMING_UDMA
) m
->udma
= max(a
->udma
, b
->udma
);
1661 static const struct ata_timing
* ata_timing_find_mode(unsigned short speed
)
1663 const struct ata_timing
*t
;
1665 for (t
= ata_timing
; t
->mode
!= speed
; t
++)
1666 if (t
->mode
== 0xFF)
1671 int ata_timing_compute(struct ata_device
*adev
, unsigned short speed
,
1672 struct ata_timing
*t
, int T
, int UT
)
1674 const struct ata_timing
*s
;
1675 struct ata_timing p
;
1681 if (!(s
= ata_timing_find_mode(speed
)))
1684 memcpy(t
, s
, sizeof(*s
));
1687 * If the drive is an EIDE drive, it can tell us it needs extended
1688 * PIO/MW_DMA cycle timing.
1691 if (adev
->id
[ATA_ID_FIELD_VALID
] & 2) { /* EIDE drive */
1692 memset(&p
, 0, sizeof(p
));
1693 if(speed
>= XFER_PIO_0
&& speed
<= XFER_SW_DMA_0
) {
1694 if (speed
<= XFER_PIO_2
) p
.cycle
= p
.cyc8b
= adev
->id
[ATA_ID_EIDE_PIO
];
1695 else p
.cycle
= p
.cyc8b
= adev
->id
[ATA_ID_EIDE_PIO_IORDY
];
1696 } else if(speed
>= XFER_MW_DMA_0
&& speed
<= XFER_MW_DMA_2
) {
1697 p
.cycle
= adev
->id
[ATA_ID_EIDE_DMA_MIN
];
1699 ata_timing_merge(&p
, t
, t
, ATA_TIMING_CYCLE
| ATA_TIMING_CYC8B
);
1703 * Convert the timing to bus clock counts.
1706 ata_timing_quantize(t
, t
, T
, UT
);
1709 * Even in DMA/UDMA modes we still use PIO access for IDENTIFY,
1710 * S.M.A.R.T * and some other commands. We have to ensure that the
1711 * DMA cycle timing is slower/equal than the fastest PIO timing.
1714 if (speed
> XFER_PIO_4
) {
1715 ata_timing_compute(adev
, adev
->pio_mode
, &p
, T
, UT
);
1716 ata_timing_merge(&p
, t
, t
, ATA_TIMING_ALL
);
1720 * Lengthen active & recovery time so that cycle time is correct.
1723 if (t
->act8b
+ t
->rec8b
< t
->cyc8b
) {
1724 t
->act8b
+= (t
->cyc8b
- (t
->act8b
+ t
->rec8b
)) / 2;
1725 t
->rec8b
= t
->cyc8b
- t
->act8b
;
1728 if (t
->active
+ t
->recover
< t
->cycle
) {
1729 t
->active
+= (t
->cycle
- (t
->active
+ t
->recover
)) / 2;
1730 t
->recover
= t
->cycle
- t
->active
;
1736 static int ata_dev_set_mode(struct ata_port
*ap
, struct ata_device
*dev
)
1738 unsigned int err_mask
;
1741 if (dev
->xfer_shift
== ATA_SHIFT_PIO
)
1742 dev
->flags
|= ATA_DFLAG_PIO
;
1744 err_mask
= ata_dev_set_xfermode(ap
, dev
);
1747 "ata%u: failed to set xfermode (err_mask=0x%x)\n",
1752 rc
= ata_dev_revalidate(ap
, dev
, 0);
1755 "ata%u: failed to revalidate after set xfermode\n",
1760 DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
1761 dev
->xfer_shift
, (int)dev
->xfer_mode
);
1763 printk(KERN_INFO
"ata%u: dev %u configured for %s\n",
1765 ata_mode_string(ata_xfer_mode2mask(dev
->xfer_mode
)));
1769 static int ata_host_set_pio(struct ata_port
*ap
)
1773 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
1774 struct ata_device
*dev
= &ap
->device
[i
];
1776 if (!ata_dev_present(dev
))
1779 if (!dev
->pio_mode
) {
1780 printk(KERN_WARNING
"ata%u: no PIO support for device %d.\n", ap
->id
, i
);
1784 dev
->xfer_mode
= dev
->pio_mode
;
1785 dev
->xfer_shift
= ATA_SHIFT_PIO
;
1786 if (ap
->ops
->set_piomode
)
1787 ap
->ops
->set_piomode(ap
, dev
);
1793 static void ata_host_set_dma(struct ata_port
*ap
)
1797 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
1798 struct ata_device
*dev
= &ap
->device
[i
];
1800 if (!ata_dev_present(dev
) || !dev
->dma_mode
)
1803 dev
->xfer_mode
= dev
->dma_mode
;
1804 dev
->xfer_shift
= ata_xfer_mode2shift(dev
->dma_mode
);
1805 if (ap
->ops
->set_dmamode
)
1806 ap
->ops
->set_dmamode(ap
, dev
);
1811 * ata_set_mode - Program timings and issue SET FEATURES - XFER
1812 * @ap: port on which timings will be programmed
1814 * Set ATA device disk transfer mode (PIO3, UDMA6, etc.).
1817 * PCI/etc. bus probe sem.
1819 static void ata_set_mode(struct ata_port
*ap
)
1821 int i
, rc
, used_dma
= 0;
1823 /* step 1: calculate xfer_mask */
1824 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
1825 struct ata_device
*dev
= &ap
->device
[i
];
1826 unsigned int pio_mask
, dma_mask
;
1828 if (!ata_dev_present(dev
))
1831 ata_dev_xfermask(ap
, dev
);
1833 /* TODO: let LLDD filter dev->*_mask here */
1835 pio_mask
= ata_pack_xfermask(dev
->pio_mask
, 0, 0);
1836 dma_mask
= ata_pack_xfermask(0, dev
->mwdma_mask
, dev
->udma_mask
);
1837 dev
->pio_mode
= ata_xfer_mask2mode(pio_mask
);
1838 dev
->dma_mode
= ata_xfer_mask2mode(dma_mask
);
1844 /* step 2: always set host PIO timings */
1845 rc
= ata_host_set_pio(ap
);
1849 /* step 3: set host DMA timings */
1850 ata_host_set_dma(ap
);
1852 /* step 4: update devices' xfer mode */
1853 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
1854 struct ata_device
*dev
= &ap
->device
[i
];
1856 if (!ata_dev_present(dev
))
1859 if (ata_dev_set_mode(ap
, dev
))
1864 * Record simplex status. If we selected DMA then the other
1865 * host channels are not permitted to do so.
1868 if (used_dma
&& (ap
->host_set
->flags
& ATA_HOST_SIMPLEX
))
1869 ap
->host_set
->simplex_claimed
= 1;
1872 * Chip specific finalisation
1874 if (ap
->ops
->post_set_mode
)
1875 ap
->ops
->post_set_mode(ap
);
1880 ata_port_disable(ap
);
1884 * ata_tf_to_host - issue ATA taskfile to host controller
1885 * @ap: port to which command is being issued
1886 * @tf: ATA taskfile register set
1888 * Issues ATA taskfile register set to ATA host controller,
1889 * with proper synchronization with interrupt handler and
1893 * spin_lock_irqsave(host_set lock)
1896 static inline void ata_tf_to_host(struct ata_port
*ap
,
1897 const struct ata_taskfile
*tf
)
1899 ap
->ops
->tf_load(ap
, tf
);
1900 ap
->ops
->exec_command(ap
, tf
);
1904 * ata_busy_sleep - sleep until BSY clears, or timeout
1905 * @ap: port containing status register to be polled
1906 * @tmout_pat: impatience timeout
1907 * @tmout: overall timeout
1909 * Sleep until ATA Status register bit BSY clears,
1910 * or a timeout occurs.
1915 unsigned int ata_busy_sleep (struct ata_port
*ap
,
1916 unsigned long tmout_pat
, unsigned long tmout
)
1918 unsigned long timer_start
, timeout
;
1921 status
= ata_busy_wait(ap
, ATA_BUSY
, 300);
1922 timer_start
= jiffies
;
1923 timeout
= timer_start
+ tmout_pat
;
1924 while ((status
& ATA_BUSY
) && (time_before(jiffies
, timeout
))) {
1926 status
= ata_busy_wait(ap
, ATA_BUSY
, 3);
1929 if (status
& ATA_BUSY
)
1930 printk(KERN_WARNING
"ata%u is slow to respond, "
1931 "please be patient\n", ap
->id
);
1933 timeout
= timer_start
+ tmout
;
1934 while ((status
& ATA_BUSY
) && (time_before(jiffies
, timeout
))) {
1936 status
= ata_chk_status(ap
);
1939 if (status
& ATA_BUSY
) {
1940 printk(KERN_ERR
"ata%u failed to respond (%lu secs)\n",
1941 ap
->id
, tmout
/ HZ
);
1948 static void ata_bus_post_reset(struct ata_port
*ap
, unsigned int devmask
)
1950 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
1951 unsigned int dev0
= devmask
& (1 << 0);
1952 unsigned int dev1
= devmask
& (1 << 1);
1953 unsigned long timeout
;
1955 /* if device 0 was found in ata_devchk, wait for its
1959 ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
);
1961 /* if device 1 was found in ata_devchk, wait for
1962 * register access, then wait for BSY to clear
1964 timeout
= jiffies
+ ATA_TMOUT_BOOT
;
1968 ap
->ops
->dev_select(ap
, 1);
1969 if (ap
->flags
& ATA_FLAG_MMIO
) {
1970 nsect
= readb((void __iomem
*) ioaddr
->nsect_addr
);
1971 lbal
= readb((void __iomem
*) ioaddr
->lbal_addr
);
1973 nsect
= inb(ioaddr
->nsect_addr
);
1974 lbal
= inb(ioaddr
->lbal_addr
);
1976 if ((nsect
== 1) && (lbal
== 1))
1978 if (time_after(jiffies
, timeout
)) {
1982 msleep(50); /* give drive a breather */
1985 ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
);
1987 /* is all this really necessary? */
1988 ap
->ops
->dev_select(ap
, 0);
1990 ap
->ops
->dev_select(ap
, 1);
1992 ap
->ops
->dev_select(ap
, 0);
1995 static unsigned int ata_bus_softreset(struct ata_port
*ap
,
1996 unsigned int devmask
)
1998 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
2000 DPRINTK("ata%u: bus reset via SRST\n", ap
->id
);
2002 /* software reset. causes dev0 to be selected */
2003 if (ap
->flags
& ATA_FLAG_MMIO
) {
2004 writeb(ap
->ctl
, (void __iomem
*) ioaddr
->ctl_addr
);
2005 udelay(20); /* FIXME: flush */
2006 writeb(ap
->ctl
| ATA_SRST
, (void __iomem
*) ioaddr
->ctl_addr
);
2007 udelay(20); /* FIXME: flush */
2008 writeb(ap
->ctl
, (void __iomem
*) ioaddr
->ctl_addr
);
2010 outb(ap
->ctl
, ioaddr
->ctl_addr
);
2012 outb(ap
->ctl
| ATA_SRST
, ioaddr
->ctl_addr
);
2014 outb(ap
->ctl
, ioaddr
->ctl_addr
);
2017 /* spec mandates ">= 2ms" before checking status.
2018 * We wait 150ms, because that was the magic delay used for
2019 * ATAPI devices in Hale Landis's ATADRVR, for the period of time
2020 * between when the ATA command register is written, and then
2021 * status is checked. Because waiting for "a while" before
2022 * checking status is fine, post SRST, we perform this magic
2023 * delay here as well.
2025 * Old drivers/ide uses the 2mS rule and then waits for ready
2029 /* Before we perform post reset processing we want to see if
2030 * the bus shows 0xFF because the odd clown forgets the D7
2031 * pulldown resistor.
2033 if (ata_check_status(ap
) == 0xFF)
2034 return AC_ERR_OTHER
;
2036 ata_bus_post_reset(ap
, devmask
);
2042 * ata_bus_reset - reset host port and associated ATA channel
2043 * @ap: port to reset
2045 * This is typically the first time we actually start issuing
2046 * commands to the ATA channel. We wait for BSY to clear, then
2047 * issue EXECUTE DEVICE DIAGNOSTIC command, polling for its
2048 * result. Determine what devices, if any, are on the channel
2049 * by looking at the device 0/1 error register. Look at the signature
2050 * stored in each device's taskfile registers, to determine if
2051 * the device is ATA or ATAPI.
2054 * PCI/etc. bus probe sem.
2055 * Obtains host_set lock.
2058 * Sets ATA_FLAG_PORT_DISABLED if bus reset fails.
2061 void ata_bus_reset(struct ata_port
*ap
)
2063 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
2064 unsigned int slave_possible
= ap
->flags
& ATA_FLAG_SLAVE_POSS
;
2066 unsigned int dev0
, dev1
= 0, devmask
= 0;
2068 DPRINTK("ENTER, host %u, port %u\n", ap
->id
, ap
->port_no
);
2070 /* determine if device 0/1 are present */
2071 if (ap
->flags
& ATA_FLAG_SATA_RESET
)
2074 dev0
= ata_devchk(ap
, 0);
2076 dev1
= ata_devchk(ap
, 1);
2080 devmask
|= (1 << 0);
2082 devmask
|= (1 << 1);
2084 /* select device 0 again */
2085 ap
->ops
->dev_select(ap
, 0);
2087 /* issue bus reset */
2088 if (ap
->flags
& ATA_FLAG_SRST
)
2089 if (ata_bus_softreset(ap
, devmask
))
2093 * determine by signature whether we have ATA or ATAPI devices
2095 ap
->device
[0].class = ata_dev_try_classify(ap
, 0, &err
);
2096 if ((slave_possible
) && (err
!= 0x81))
2097 ap
->device
[1].class = ata_dev_try_classify(ap
, 1, &err
);
2099 /* re-enable interrupts */
2100 if (ap
->ioaddr
.ctl_addr
) /* FIXME: hack. create a hook instead */
2103 /* is double-select really necessary? */
2104 if (ap
->device
[1].class != ATA_DEV_NONE
)
2105 ap
->ops
->dev_select(ap
, 1);
2106 if (ap
->device
[0].class != ATA_DEV_NONE
)
2107 ap
->ops
->dev_select(ap
, 0);
2109 /* if no devices were detected, disable this port */
2110 if ((ap
->device
[0].class == ATA_DEV_NONE
) &&
2111 (ap
->device
[1].class == ATA_DEV_NONE
))
2114 if (ap
->flags
& (ATA_FLAG_SATA_RESET
| ATA_FLAG_SRST
)) {
2115 /* set up device control for ATA_FLAG_SATA_RESET */
2116 if (ap
->flags
& ATA_FLAG_MMIO
)
2117 writeb(ap
->ctl
, (void __iomem
*) ioaddr
->ctl_addr
);
2119 outb(ap
->ctl
, ioaddr
->ctl_addr
);
2126 printk(KERN_ERR
"ata%u: disabling port\n", ap
->id
);
2127 ap
->ops
->port_disable(ap
);
2132 static int sata_phy_resume(struct ata_port
*ap
)
2134 unsigned long timeout
= jiffies
+ (HZ
* 5);
2137 scr_write_flush(ap
, SCR_CONTROL
, 0x300);
2139 /* Wait for phy to become ready, if necessary. */
2142 sstatus
= scr_read(ap
, SCR_STATUS
);
2143 if ((sstatus
& 0xf) != 1)
2145 } while (time_before(jiffies
, timeout
));
2151 * ata_std_probeinit - initialize probing
2152 * @ap: port to be probed
2154 * @ap is about to be probed. Initialize it. This function is
2155 * to be used as standard callback for ata_drive_probe_reset().
2157 * NOTE!!! Do not use this function as probeinit if a low level
2158 * driver implements only hardreset. Just pass NULL as probeinit
2159 * in that case. Using this function is probably okay but doing
2160 * so makes reset sequence different from the original
2161 * ->phy_reset implementation and Jeff nervous. :-P
2163 void ata_std_probeinit(struct ata_port
*ap
)
2165 if ((ap
->flags
& ATA_FLAG_SATA
) && ap
->ops
->scr_read
) {
2166 sata_phy_resume(ap
);
2167 if (sata_dev_present(ap
))
2168 ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
);
2173 * ata_std_softreset - reset host port via ATA SRST
2174 * @ap: port to reset
2175 * @verbose: fail verbosely
2176 * @classes: resulting classes of attached devices
2178 * Reset host port using ATA SRST. This function is to be used
2179 * as standard callback for ata_drive_*_reset() functions.
2182 * Kernel thread context (may sleep)
2185 * 0 on success, -errno otherwise.
2187 int ata_std_softreset(struct ata_port
*ap
, int verbose
, unsigned int *classes
)
2189 unsigned int slave_possible
= ap
->flags
& ATA_FLAG_SLAVE_POSS
;
2190 unsigned int devmask
= 0, err_mask
;
2195 if (ap
->ops
->scr_read
&& !sata_dev_present(ap
)) {
2196 classes
[0] = ATA_DEV_NONE
;
2200 /* determine if device 0/1 are present */
2201 if (ata_devchk(ap
, 0))
2202 devmask
|= (1 << 0);
2203 if (slave_possible
&& ata_devchk(ap
, 1))
2204 devmask
|= (1 << 1);
2206 /* select device 0 again */
2207 ap
->ops
->dev_select(ap
, 0);
2209 /* issue bus reset */
2210 DPRINTK("about to softreset, devmask=%x\n", devmask
);
2211 err_mask
= ata_bus_softreset(ap
, devmask
);
2214 printk(KERN_ERR
"ata%u: SRST failed (err_mask=0x%x)\n",
2217 DPRINTK("EXIT, softreset failed (err_mask=0x%x)\n",
2222 /* determine by signature whether we have ATA or ATAPI devices */
2223 classes
[0] = ata_dev_try_classify(ap
, 0, &err
);
2224 if (slave_possible
&& err
!= 0x81)
2225 classes
[1] = ata_dev_try_classify(ap
, 1, &err
);
2228 DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes
[0], classes
[1]);
2233 * sata_std_hardreset - reset host port via SATA phy reset
2234 * @ap: port to reset
2235 * @verbose: fail verbosely
2236 * @class: resulting class of attached device
2238 * SATA phy-reset host port using DET bits of SControl register.
2239 * This function is to be used as standard callback for
2240 * ata_drive_*_reset().
2243 * Kernel thread context (may sleep)
2246 * 0 on success, -errno otherwise.
2248 int sata_std_hardreset(struct ata_port
*ap
, int verbose
, unsigned int *class)
2252 /* Issue phy wake/reset */
2253 scr_write_flush(ap
, SCR_CONTROL
, 0x301);
2256 * Couldn't find anything in SATA I/II specs, but AHCI-1.1
2257 * 10.4.2 says at least 1 ms.
2261 /* Bring phy back */
2262 sata_phy_resume(ap
);
2264 /* TODO: phy layer with polling, timeouts, etc. */
2265 if (!sata_dev_present(ap
)) {
2266 *class = ATA_DEV_NONE
;
2267 DPRINTK("EXIT, link offline\n");
2271 if (ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
)) {
2273 printk(KERN_ERR
"ata%u: COMRESET failed "
2274 "(device not ready)\n", ap
->id
);
2276 DPRINTK("EXIT, device not ready\n");
2280 ap
->ops
->dev_select(ap
, 0); /* probably unnecessary */
2282 *class = ata_dev_try_classify(ap
, 0, NULL
);
2284 DPRINTK("EXIT, class=%u\n", *class);
2289 * ata_std_postreset - standard postreset callback
2290 * @ap: the target ata_port
2291 * @classes: classes of attached devices
2293 * This function is invoked after a successful reset. Note that
2294 * the device might have been reset more than once using
2295 * different reset methods before postreset is invoked.
2297 * This function is to be used as standard callback for
2298 * ata_drive_*_reset().
2301 * Kernel thread context (may sleep)
2303 void ata_std_postreset(struct ata_port
*ap
, unsigned int *classes
)
2307 /* set cable type if it isn't already set */
2308 if (ap
->cbl
== ATA_CBL_NONE
&& ap
->flags
& ATA_FLAG_SATA
)
2309 ap
->cbl
= ATA_CBL_SATA
;
2311 /* print link status */
2312 if (ap
->cbl
== ATA_CBL_SATA
)
2313 sata_print_link_status(ap
);
2315 /* re-enable interrupts */
2316 if (ap
->ioaddr
.ctl_addr
) /* FIXME: hack. create a hook instead */
2319 /* is double-select really necessary? */
2320 if (classes
[0] != ATA_DEV_NONE
)
2321 ap
->ops
->dev_select(ap
, 1);
2322 if (classes
[1] != ATA_DEV_NONE
)
2323 ap
->ops
->dev_select(ap
, 0);
2325 /* bail out if no device is present */
2326 if (classes
[0] == ATA_DEV_NONE
&& classes
[1] == ATA_DEV_NONE
) {
2327 DPRINTK("EXIT, no device\n");
2331 /* set up device control */
2332 if (ap
->ioaddr
.ctl_addr
) {
2333 if (ap
->flags
& ATA_FLAG_MMIO
)
2334 writeb(ap
->ctl
, (void __iomem
*) ap
->ioaddr
.ctl_addr
);
2336 outb(ap
->ctl
, ap
->ioaddr
.ctl_addr
);
2343 * ata_std_probe_reset - standard probe reset method
2344 * @ap: prot to perform probe-reset
2345 * @classes: resulting classes of attached devices
2347 * The stock off-the-shelf ->probe_reset method.
2350 * Kernel thread context (may sleep)
2353 * 0 on success, -errno otherwise.
2355 int ata_std_probe_reset(struct ata_port
*ap
, unsigned int *classes
)
2357 ata_reset_fn_t hardreset
;
2360 if (ap
->flags
& ATA_FLAG_SATA
&& ap
->ops
->scr_read
)
2361 hardreset
= sata_std_hardreset
;
2363 return ata_drive_probe_reset(ap
, ata_std_probeinit
,
2364 ata_std_softreset
, hardreset
,
2365 ata_std_postreset
, classes
);
2368 static int do_probe_reset(struct ata_port
*ap
, ata_reset_fn_t reset
,
2369 ata_postreset_fn_t postreset
,
2370 unsigned int *classes
)
2374 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
2375 classes
[i
] = ATA_DEV_UNKNOWN
;
2377 rc
= reset(ap
, 0, classes
);
2381 /* If any class isn't ATA_DEV_UNKNOWN, consider classification
2382 * is complete and convert all ATA_DEV_UNKNOWN to
2385 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
2386 if (classes
[i
] != ATA_DEV_UNKNOWN
)
2389 if (i
< ATA_MAX_DEVICES
)
2390 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
2391 if (classes
[i
] == ATA_DEV_UNKNOWN
)
2392 classes
[i
] = ATA_DEV_NONE
;
2395 postreset(ap
, classes
);
2397 return classes
[0] != ATA_DEV_UNKNOWN
? 0 : -ENODEV
;
2401 * ata_drive_probe_reset - Perform probe reset with given methods
2402 * @ap: port to reset
2403 * @probeinit: probeinit method (can be NULL)
2404 * @softreset: softreset method (can be NULL)
2405 * @hardreset: hardreset method (can be NULL)
2406 * @postreset: postreset method (can be NULL)
2407 * @classes: resulting classes of attached devices
2409 * Reset the specified port and classify attached devices using
2410 * given methods. This function prefers softreset but tries all
2411 * possible reset sequences to reset and classify devices. This
2412 * function is intended to be used for constructing ->probe_reset
2413 * callback by low level drivers.
2415 * Reset methods should follow the following rules.
2417 * - Return 0 on sucess, -errno on failure.
2418 * - If classification is supported, fill classes[] with
2419 * recognized class codes.
2420 * - If classification is not supported, leave classes[] alone.
2421 * - If verbose is non-zero, print error message on failure;
2422 * otherwise, shut up.
2425 * Kernel thread context (may sleep)
2428 * 0 on success, -EINVAL if no reset method is avaliable, -ENODEV
2429 * if classification fails, and any error code from reset
2432 int ata_drive_probe_reset(struct ata_port
*ap
, ata_probeinit_fn_t probeinit
,
2433 ata_reset_fn_t softreset
, ata_reset_fn_t hardreset
,
2434 ata_postreset_fn_t postreset
, unsigned int *classes
)
2442 rc
= do_probe_reset(ap
, softreset
, postreset
, classes
);
2450 rc
= do_probe_reset(ap
, hardreset
, postreset
, classes
);
2451 if (rc
== 0 || rc
!= -ENODEV
)
2455 rc
= do_probe_reset(ap
, softreset
, postreset
, classes
);
2461 * ata_dev_same_device - Determine whether new ID matches configured device
2462 * @ap: port on which the device to compare against resides
2463 * @dev: device to compare against
2464 * @new_class: class of the new device
2465 * @new_id: IDENTIFY page of the new device
2467 * Compare @new_class and @new_id against @dev and determine
2468 * whether @dev is the device indicated by @new_class and
2475 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
2477 static int ata_dev_same_device(struct ata_port
*ap
, struct ata_device
*dev
,
2478 unsigned int new_class
, const u16
*new_id
)
2480 const u16
*old_id
= dev
->id
;
2481 unsigned char model
[2][41], serial
[2][21];
2484 if (dev
->class != new_class
) {
2486 "ata%u: dev %u class mismatch %d != %d\n",
2487 ap
->id
, dev
->devno
, dev
->class, new_class
);
2491 ata_id_c_string(old_id
, model
[0], ATA_ID_PROD_OFS
, sizeof(model
[0]));
2492 ata_id_c_string(new_id
, model
[1], ATA_ID_PROD_OFS
, sizeof(model
[1]));
2493 ata_id_c_string(old_id
, serial
[0], ATA_ID_SERNO_OFS
, sizeof(serial
[0]));
2494 ata_id_c_string(new_id
, serial
[1], ATA_ID_SERNO_OFS
, sizeof(serial
[1]));
2495 new_n_sectors
= ata_id_n_sectors(new_id
);
2497 if (strcmp(model
[0], model
[1])) {
2499 "ata%u: dev %u model number mismatch '%s' != '%s'\n",
2500 ap
->id
, dev
->devno
, model
[0], model
[1]);
2504 if (strcmp(serial
[0], serial
[1])) {
2506 "ata%u: dev %u serial number mismatch '%s' != '%s'\n",
2507 ap
->id
, dev
->devno
, serial
[0], serial
[1]);
2511 if (dev
->class == ATA_DEV_ATA
&& dev
->n_sectors
!= new_n_sectors
) {
2513 "ata%u: dev %u n_sectors mismatch %llu != %llu\n",
2514 ap
->id
, dev
->devno
, (unsigned long long)dev
->n_sectors
,
2515 (unsigned long long)new_n_sectors
);
2523 * ata_dev_revalidate - Revalidate ATA device
2524 * @ap: port on which the device to revalidate resides
2525 * @dev: device to revalidate
2526 * @post_reset: is this revalidation after reset?
2528 * Re-read IDENTIFY page and make sure @dev is still attached to
2532 * Kernel thread context (may sleep)
2535 * 0 on success, negative errno otherwise
2537 int ata_dev_revalidate(struct ata_port
*ap
, struct ata_device
*dev
,
2544 if (!ata_dev_present(dev
))
2550 /* allocate & read ID data */
2551 rc
= ata_dev_read_id(ap
, dev
, &class, post_reset
, &id
);
2555 /* is the device still there? */
2556 if (!ata_dev_same_device(ap
, dev
, class, id
)) {
2564 /* configure device according to the new ID */
2565 return ata_dev_configure(ap
, dev
, 0);
2568 printk(KERN_ERR
"ata%u: dev %u revalidation failed (errno=%d)\n",
2569 ap
->id
, dev
->devno
, rc
);
2574 static const char * const ata_dma_blacklist
[] = {
2575 "WDC AC11000H", NULL
,
2576 "WDC AC22100H", NULL
,
2577 "WDC AC32500H", NULL
,
2578 "WDC AC33100H", NULL
,
2579 "WDC AC31600H", NULL
,
2580 "WDC AC32100H", "24.09P07",
2581 "WDC AC23200L", "21.10N21",
2582 "Compaq CRD-8241B", NULL
,
2587 "SanDisk SDP3B", NULL
,
2588 "SanDisk SDP3B-64", NULL
,
2589 "SANYO CD-ROM CRD", NULL
,
2590 "HITACHI CDR-8", NULL
,
2591 "HITACHI CDR-8335", NULL
,
2592 "HITACHI CDR-8435", NULL
,
2593 "Toshiba CD-ROM XM-6202B", NULL
,
2594 "TOSHIBA CD-ROM XM-1702BC", NULL
,
2596 "E-IDE CD-ROM CR-840", NULL
,
2597 "CD-ROM Drive/F5A", NULL
,
2598 "WPI CDD-820", NULL
,
2599 "SAMSUNG CD-ROM SC-148C", NULL
,
2600 "SAMSUNG CD-ROM SC", NULL
,
2601 "SanDisk SDP3B-64", NULL
,
2602 "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL
,
2603 "_NEC DV5800A", NULL
,
2604 "SAMSUNG CD-ROM SN-124", "N001"
2607 static int ata_strim(char *s
, size_t len
)
2609 len
= strnlen(s
, len
);
2611 /* ATAPI specifies that empty space is blank-filled; remove blanks */
2612 while ((len
> 0) && (s
[len
- 1] == ' ')) {
2619 static int ata_dma_blacklisted(const struct ata_device
*dev
)
2621 unsigned char model_num
[40];
2622 unsigned char model_rev
[16];
2623 unsigned int nlen
, rlen
;
2626 ata_id_string(dev
->id
, model_num
, ATA_ID_PROD_OFS
,
2628 ata_id_string(dev
->id
, model_rev
, ATA_ID_FW_REV_OFS
,
2630 nlen
= ata_strim(model_num
, sizeof(model_num
));
2631 rlen
= ata_strim(model_rev
, sizeof(model_rev
));
2633 for (i
= 0; i
< ARRAY_SIZE(ata_dma_blacklist
); i
+= 2) {
2634 if (!strncmp(ata_dma_blacklist
[i
], model_num
, nlen
)) {
2635 if (ata_dma_blacklist
[i
+1] == NULL
)
2637 if (!strncmp(ata_dma_blacklist
[i
], model_rev
, rlen
))
2645 * ata_dev_xfermask - Compute supported xfermask of the given device
2646 * @ap: Port on which the device to compute xfermask for resides
2647 * @dev: Device to compute xfermask for
2649 * Compute supported xfermask of @dev and store it in
2650 * dev->*_mask. This function is responsible for applying all
2651 * known limits including host controller limits, device
2654 * FIXME: The current implementation limits all transfer modes to
2655 * the fastest of the lowested device on the port. This is not
2656 * required on most controllers.
2661 static void ata_dev_xfermask(struct ata_port
*ap
, struct ata_device
*dev
)
2663 struct ata_host_set
*hs
= ap
->host_set
;
2664 unsigned long xfer_mask
;
2667 xfer_mask
= ata_pack_xfermask(ap
->pio_mask
, ap
->mwdma_mask
,
2670 /* FIXME: Use port-wide xfermask for now */
2671 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
2672 struct ata_device
*d
= &ap
->device
[i
];
2673 if (!ata_dev_present(d
))
2675 xfer_mask
&= ata_pack_xfermask(d
->pio_mask
, d
->mwdma_mask
,
2677 xfer_mask
&= ata_id_xfermask(d
->id
);
2678 if (ata_dma_blacklisted(d
))
2679 xfer_mask
&= ~(ATA_MASK_MWDMA
| ATA_MASK_UDMA
);
2680 /* Apply cable rule here. Don't apply it early because when
2681 we handle hot plug the cable type can itself change */
2682 if (ap
->cbl
== ATA_CBL_PATA40
)
2683 xfer_mask
&= ~(0xF8 << ATA_SHIFT_UDMA
);
2686 if (ata_dma_blacklisted(dev
))
2687 printk(KERN_WARNING
"ata%u: dev %u is on DMA blacklist, "
2688 "disabling DMA\n", ap
->id
, dev
->devno
);
2690 if (hs
->flags
& ATA_HOST_SIMPLEX
) {
2691 if (hs
->simplex_claimed
)
2692 xfer_mask
&= ~(ATA_MASK_MWDMA
| ATA_MASK_UDMA
);
2694 if (ap
->ops
->mode_filter
)
2695 xfer_mask
= ap
->ops
->mode_filter(ap
, dev
, xfer_mask
);
2697 ata_unpack_xfermask(xfer_mask
, &dev
->pio_mask
, &dev
->mwdma_mask
,
2702 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
2703 * @ap: Port associated with device @dev
2704 * @dev: Device to which command will be sent
2706 * Issue SET FEATURES - XFER MODE command to device @dev
2710 * PCI/etc. bus probe sem.
2713 * 0 on success, AC_ERR_* mask otherwise.
2716 static unsigned int ata_dev_set_xfermode(struct ata_port
*ap
,
2717 struct ata_device
*dev
)
2719 struct ata_taskfile tf
;
2720 unsigned int err_mask
;
2722 /* set up set-features taskfile */
2723 DPRINTK("set features - xfer mode\n");
2725 ata_tf_init(ap
, &tf
, dev
->devno
);
2726 tf
.command
= ATA_CMD_SET_FEATURES
;
2727 tf
.feature
= SETFEATURES_XFER
;
2728 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
2729 tf
.protocol
= ATA_PROT_NODATA
;
2730 tf
.nsect
= dev
->xfer_mode
;
2732 err_mask
= ata_exec_internal(ap
, dev
, &tf
, DMA_NONE
, NULL
, 0);
2734 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
2739 * ata_dev_init_params - Issue INIT DEV PARAMS command
2740 * @ap: Port associated with device @dev
2741 * @dev: Device to which command will be sent
2744 * Kernel thread context (may sleep)
2747 * 0 on success, AC_ERR_* mask otherwise.
2750 static unsigned int ata_dev_init_params(struct ata_port
*ap
,
2751 struct ata_device
*dev
,
2755 struct ata_taskfile tf
;
2756 unsigned int err_mask
;
2758 /* Number of sectors per track 1-255. Number of heads 1-16 */
2759 if (sectors
< 1 || sectors
> 255 || heads
< 1 || heads
> 16)
2760 return AC_ERR_INVALID
;
2762 /* set up init dev params taskfile */
2763 DPRINTK("init dev params \n");
2765 ata_tf_init(ap
, &tf
, dev
->devno
);
2766 tf
.command
= ATA_CMD_INIT_DEV_PARAMS
;
2767 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
2768 tf
.protocol
= ATA_PROT_NODATA
;
2770 tf
.device
|= (heads
- 1) & 0x0f; /* max head = num. of heads - 1 */
2772 err_mask
= ata_exec_internal(ap
, dev
, &tf
, DMA_NONE
, NULL
, 0);
2774 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
2779 * ata_sg_clean - Unmap DMA memory associated with command
2780 * @qc: Command containing DMA memory to be released
2782 * Unmap all mapped DMA memory associated with this command.
2785 * spin_lock_irqsave(host_set lock)
2788 static void ata_sg_clean(struct ata_queued_cmd
*qc
)
2790 struct ata_port
*ap
= qc
->ap
;
2791 struct scatterlist
*sg
= qc
->__sg
;
2792 int dir
= qc
->dma_dir
;
2793 void *pad_buf
= NULL
;
2795 WARN_ON(!(qc
->flags
& ATA_QCFLAG_DMAMAP
));
2796 WARN_ON(sg
== NULL
);
2798 if (qc
->flags
& ATA_QCFLAG_SINGLE
)
2799 WARN_ON(qc
->n_elem
> 1);
2801 VPRINTK("unmapping %u sg elements\n", qc
->n_elem
);
2803 /* if we padded the buffer out to 32-bit bound, and data
2804 * xfer direction is from-device, we must copy from the
2805 * pad buffer back into the supplied buffer
2807 if (qc
->pad_len
&& !(qc
->tf
.flags
& ATA_TFLAG_WRITE
))
2808 pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
2810 if (qc
->flags
& ATA_QCFLAG_SG
) {
2812 dma_unmap_sg(ap
->dev
, sg
, qc
->n_elem
, dir
);
2813 /* restore last sg */
2814 sg
[qc
->orig_n_elem
- 1].length
+= qc
->pad_len
;
2816 struct scatterlist
*psg
= &qc
->pad_sgent
;
2817 void *addr
= kmap_atomic(psg
->page
, KM_IRQ0
);
2818 memcpy(addr
+ psg
->offset
, pad_buf
, qc
->pad_len
);
2819 kunmap_atomic(addr
, KM_IRQ0
);
2823 dma_unmap_single(ap
->dev
,
2824 sg_dma_address(&sg
[0]), sg_dma_len(&sg
[0]),
2827 sg
->length
+= qc
->pad_len
;
2829 memcpy(qc
->buf_virt
+ sg
->length
- qc
->pad_len
,
2830 pad_buf
, qc
->pad_len
);
2833 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
2838 * ata_fill_sg - Fill PCI IDE PRD table
2839 * @qc: Metadata associated with taskfile to be transferred
2841 * Fill PCI IDE PRD (scatter-gather) table with segments
2842 * associated with the current disk command.
2845 * spin_lock_irqsave(host_set lock)
2848 static void ata_fill_sg(struct ata_queued_cmd
*qc
)
2850 struct ata_port
*ap
= qc
->ap
;
2851 struct scatterlist
*sg
;
2854 WARN_ON(qc
->__sg
== NULL
);
2855 WARN_ON(qc
->n_elem
== 0 && qc
->pad_len
== 0);
2858 ata_for_each_sg(sg
, qc
) {
2862 /* determine if physical DMA addr spans 64K boundary.
2863 * Note h/w doesn't support 64-bit, so we unconditionally
2864 * truncate dma_addr_t to u32.
2866 addr
= (u32
) sg_dma_address(sg
);
2867 sg_len
= sg_dma_len(sg
);
2870 offset
= addr
& 0xffff;
2872 if ((offset
+ sg_len
) > 0x10000)
2873 len
= 0x10000 - offset
;
2875 ap
->prd
[idx
].addr
= cpu_to_le32(addr
);
2876 ap
->prd
[idx
].flags_len
= cpu_to_le32(len
& 0xffff);
2877 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx
, addr
, len
);
2886 ap
->prd
[idx
- 1].flags_len
|= cpu_to_le32(ATA_PRD_EOT
);
2889 * ata_check_atapi_dma - Check whether ATAPI DMA can be supported
2890 * @qc: Metadata associated with taskfile to check
2892 * Allow low-level driver to filter ATA PACKET commands, returning
2893 * a status indicating whether or not it is OK to use DMA for the
2894 * supplied PACKET command.
2897 * spin_lock_irqsave(host_set lock)
2899 * RETURNS: 0 when ATAPI DMA can be used
2902 int ata_check_atapi_dma(struct ata_queued_cmd
*qc
)
2904 struct ata_port
*ap
= qc
->ap
;
2905 int rc
= 0; /* Assume ATAPI DMA is OK by default */
2907 if (ap
->ops
->check_atapi_dma
)
2908 rc
= ap
->ops
->check_atapi_dma(qc
);
2913 * ata_qc_prep - Prepare taskfile for submission
2914 * @qc: Metadata associated with taskfile to be prepared
2916 * Prepare ATA taskfile for submission.
2919 * spin_lock_irqsave(host_set lock)
2921 void ata_qc_prep(struct ata_queued_cmd
*qc
)
2923 if (!(qc
->flags
& ATA_QCFLAG_DMAMAP
))
2929 void ata_noop_qc_prep(struct ata_queued_cmd
*qc
) { }
2932 * ata_sg_init_one - Associate command with memory buffer
2933 * @qc: Command to be associated
2934 * @buf: Memory buffer
2935 * @buflen: Length of memory buffer, in bytes.
2937 * Initialize the data-related elements of queued_cmd @qc
2938 * to point to a single memory buffer, @buf of byte length @buflen.
2941 * spin_lock_irqsave(host_set lock)
2944 void ata_sg_init_one(struct ata_queued_cmd
*qc
, void *buf
, unsigned int buflen
)
2946 struct scatterlist
*sg
;
2948 qc
->flags
|= ATA_QCFLAG_SINGLE
;
2950 memset(&qc
->sgent
, 0, sizeof(qc
->sgent
));
2951 qc
->__sg
= &qc
->sgent
;
2953 qc
->orig_n_elem
= 1;
2957 sg_init_one(sg
, buf
, buflen
);
2961 * ata_sg_init - Associate command with scatter-gather table.
2962 * @qc: Command to be associated
2963 * @sg: Scatter-gather table.
2964 * @n_elem: Number of elements in s/g table.
2966 * Initialize the data-related elements of queued_cmd @qc
2967 * to point to a scatter-gather table @sg, containing @n_elem
2971 * spin_lock_irqsave(host_set lock)
2974 void ata_sg_init(struct ata_queued_cmd
*qc
, struct scatterlist
*sg
,
2975 unsigned int n_elem
)
2977 qc
->flags
|= ATA_QCFLAG_SG
;
2979 qc
->n_elem
= n_elem
;
2980 qc
->orig_n_elem
= n_elem
;
2984 * ata_sg_setup_one - DMA-map the memory buffer associated with a command.
2985 * @qc: Command with memory buffer to be mapped.
2987 * DMA-map the memory buffer associated with queued_cmd @qc.
2990 * spin_lock_irqsave(host_set lock)
2993 * Zero on success, negative on error.
2996 static int ata_sg_setup_one(struct ata_queued_cmd
*qc
)
2998 struct ata_port
*ap
= qc
->ap
;
2999 int dir
= qc
->dma_dir
;
3000 struct scatterlist
*sg
= qc
->__sg
;
3001 dma_addr_t dma_address
;
3004 /* we must lengthen transfers to end on a 32-bit boundary */
3005 qc
->pad_len
= sg
->length
& 3;
3007 void *pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
3008 struct scatterlist
*psg
= &qc
->pad_sgent
;
3010 WARN_ON(qc
->dev
->class != ATA_DEV_ATAPI
);
3012 memset(pad_buf
, 0, ATA_DMA_PAD_SZ
);
3014 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
)
3015 memcpy(pad_buf
, qc
->buf_virt
+ sg
->length
- qc
->pad_len
,
3018 sg_dma_address(psg
) = ap
->pad_dma
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
3019 sg_dma_len(psg
) = ATA_DMA_PAD_SZ
;
3021 sg
->length
-= qc
->pad_len
;
3022 if (sg
->length
== 0)
3025 DPRINTK("padding done, sg->length=%u pad_len=%u\n",
3026 sg
->length
, qc
->pad_len
);
3034 dma_address
= dma_map_single(ap
->dev
, qc
->buf_virt
,
3036 if (dma_mapping_error(dma_address
)) {
3038 sg
->length
+= qc
->pad_len
;
3042 sg_dma_address(sg
) = dma_address
;
3043 sg_dma_len(sg
) = sg
->length
;
3046 DPRINTK("mapped buffer of %d bytes for %s\n", sg_dma_len(sg
),
3047 qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
3053 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
3054 * @qc: Command with scatter-gather table to be mapped.
3056 * DMA-map the scatter-gather table associated with queued_cmd @qc.
3059 * spin_lock_irqsave(host_set lock)
3062 * Zero on success, negative on error.
3066 static int ata_sg_setup(struct ata_queued_cmd
*qc
)
3068 struct ata_port
*ap
= qc
->ap
;
3069 struct scatterlist
*sg
= qc
->__sg
;
3070 struct scatterlist
*lsg
= &sg
[qc
->n_elem
- 1];
3071 int n_elem
, pre_n_elem
, dir
, trim_sg
= 0;
3073 VPRINTK("ENTER, ata%u\n", ap
->id
);
3074 WARN_ON(!(qc
->flags
& ATA_QCFLAG_SG
));
3076 /* we must lengthen transfers to end on a 32-bit boundary */
3077 qc
->pad_len
= lsg
->length
& 3;
3079 void *pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
3080 struct scatterlist
*psg
= &qc
->pad_sgent
;
3081 unsigned int offset
;
3083 WARN_ON(qc
->dev
->class != ATA_DEV_ATAPI
);
3085 memset(pad_buf
, 0, ATA_DMA_PAD_SZ
);
3088 * psg->page/offset are used to copy to-be-written
3089 * data in this function or read data in ata_sg_clean.
3091 offset
= lsg
->offset
+ lsg
->length
- qc
->pad_len
;
3092 psg
->page
= nth_page(lsg
->page
, offset
>> PAGE_SHIFT
);
3093 psg
->offset
= offset_in_page(offset
);
3095 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
) {
3096 void *addr
= kmap_atomic(psg
->page
, KM_IRQ0
);
3097 memcpy(pad_buf
, addr
+ psg
->offset
, qc
->pad_len
);
3098 kunmap_atomic(addr
, KM_IRQ0
);
3101 sg_dma_address(psg
) = ap
->pad_dma
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
3102 sg_dma_len(psg
) = ATA_DMA_PAD_SZ
;
3104 lsg
->length
-= qc
->pad_len
;
3105 if (lsg
->length
== 0)
3108 DPRINTK("padding done, sg[%d].length=%u pad_len=%u\n",
3109 qc
->n_elem
- 1, lsg
->length
, qc
->pad_len
);
3112 pre_n_elem
= qc
->n_elem
;
3113 if (trim_sg
&& pre_n_elem
)
3122 n_elem
= dma_map_sg(ap
->dev
, sg
, pre_n_elem
, dir
);
3124 /* restore last sg */
3125 lsg
->length
+= qc
->pad_len
;
3129 DPRINTK("%d sg elements mapped\n", n_elem
);
3132 qc
->n_elem
= n_elem
;
3138 * ata_poll_qc_complete - turn irq back on and finish qc
3139 * @qc: Command to complete
3140 * @err_mask: ATA status register content
3143 * None. (grabs host lock)
3146 void ata_poll_qc_complete(struct ata_queued_cmd
*qc
)
3148 struct ata_port
*ap
= qc
->ap
;
3149 unsigned long flags
;
3151 spin_lock_irqsave(&ap
->host_set
->lock
, flags
);
3152 ap
->flags
&= ~ATA_FLAG_NOINTR
;
3154 ata_qc_complete(qc
);
3155 spin_unlock_irqrestore(&ap
->host_set
->lock
, flags
);
3159 * ata_pio_poll - poll using PIO, depending on current state
3160 * @ap: the target ata_port
3163 * None. (executing in kernel thread context)
3166 * timeout value to use
3169 static unsigned long ata_pio_poll(struct ata_port
*ap
)
3171 struct ata_queued_cmd
*qc
;
3173 unsigned int poll_state
= HSM_ST_UNKNOWN
;
3174 unsigned int reg_state
= HSM_ST_UNKNOWN
;
3176 qc
= ata_qc_from_tag(ap
, ap
->active_tag
);
3177 WARN_ON(qc
== NULL
);
3179 switch (ap
->hsm_task_state
) {
3182 poll_state
= HSM_ST_POLL
;
3186 case HSM_ST_LAST_POLL
:
3187 poll_state
= HSM_ST_LAST_POLL
;
3188 reg_state
= HSM_ST_LAST
;
3195 status
= ata_chk_status(ap
);
3196 if (status
& ATA_BUSY
) {
3197 if (time_after(jiffies
, ap
->pio_task_timeout
)) {
3198 qc
->err_mask
|= AC_ERR_TIMEOUT
;
3199 ap
->hsm_task_state
= HSM_ST_TMOUT
;
3202 ap
->hsm_task_state
= poll_state
;
3203 return ATA_SHORT_PAUSE
;
3206 ap
->hsm_task_state
= reg_state
;
3211 * ata_pio_complete - check if drive is busy or idle
3212 * @ap: the target ata_port
3215 * None. (executing in kernel thread context)
3218 * Non-zero if qc completed, zero otherwise.
3221 static int ata_pio_complete (struct ata_port
*ap
)
3223 struct ata_queued_cmd
*qc
;
3227 * This is purely heuristic. This is a fast path. Sometimes when
3228 * we enter, BSY will be cleared in a chk-status or two. If not,
3229 * the drive is probably seeking or something. Snooze for a couple
3230 * msecs, then chk-status again. If still busy, fall back to
3231 * HSM_ST_POLL state.
3233 drv_stat
= ata_busy_wait(ap
, ATA_BUSY
, 10);
3234 if (drv_stat
& ATA_BUSY
) {
3236 drv_stat
= ata_busy_wait(ap
, ATA_BUSY
, 10);
3237 if (drv_stat
& ATA_BUSY
) {
3238 ap
->hsm_task_state
= HSM_ST_LAST_POLL
;
3239 ap
->pio_task_timeout
= jiffies
+ ATA_TMOUT_PIO
;
3244 qc
= ata_qc_from_tag(ap
, ap
->active_tag
);
3245 WARN_ON(qc
== NULL
);
3247 drv_stat
= ata_wait_idle(ap
);
3248 if (!ata_ok(drv_stat
)) {
3249 qc
->err_mask
|= __ac_err_mask(drv_stat
);
3250 ap
->hsm_task_state
= HSM_ST_ERR
;
3254 ap
->hsm_task_state
= HSM_ST_IDLE
;
3256 WARN_ON(qc
->err_mask
);
3257 ata_poll_qc_complete(qc
);
3259 /* another command may start at this point */
3266 * swap_buf_le16 - swap halves of 16-bit words in place
3267 * @buf: Buffer to swap
3268 * @buf_words: Number of 16-bit words in buffer.
3270 * Swap halves of 16-bit words if needed to convert from
3271 * little-endian byte order to native cpu byte order, or
3275 * Inherited from caller.
3277 void swap_buf_le16(u16
*buf
, unsigned int buf_words
)
3282 for (i
= 0; i
< buf_words
; i
++)
3283 buf
[i
] = le16_to_cpu(buf
[i
]);
3284 #endif /* __BIG_ENDIAN */
3288 * ata_mmio_data_xfer - Transfer data by MMIO
3289 * @ap: port to read/write
3291 * @buflen: buffer length
3292 * @write_data: read/write
3294 * Transfer data from/to the device data register by MMIO.
3297 * Inherited from caller.
3300 static void ata_mmio_data_xfer(struct ata_port
*ap
, unsigned char *buf
,
3301 unsigned int buflen
, int write_data
)
3304 unsigned int words
= buflen
>> 1;
3305 u16
*buf16
= (u16
*) buf
;
3306 void __iomem
*mmio
= (void __iomem
*)ap
->ioaddr
.data_addr
;
3308 /* Transfer multiple of 2 bytes */
3310 for (i
= 0; i
< words
; i
++)
3311 writew(le16_to_cpu(buf16
[i
]), mmio
);
3313 for (i
= 0; i
< words
; i
++)
3314 buf16
[i
] = cpu_to_le16(readw(mmio
));
3317 /* Transfer trailing 1 byte, if any. */
3318 if (unlikely(buflen
& 0x01)) {
3319 u16 align_buf
[1] = { 0 };
3320 unsigned char *trailing_buf
= buf
+ buflen
- 1;
3323 memcpy(align_buf
, trailing_buf
, 1);
3324 writew(le16_to_cpu(align_buf
[0]), mmio
);
3326 align_buf
[0] = cpu_to_le16(readw(mmio
));
3327 memcpy(trailing_buf
, align_buf
, 1);
3333 * ata_pio_data_xfer - Transfer data by PIO
3334 * @ap: port to read/write
3336 * @buflen: buffer length
3337 * @write_data: read/write
3339 * Transfer data from/to the device data register by PIO.
3342 * Inherited from caller.
3345 static void ata_pio_data_xfer(struct ata_port
*ap
, unsigned char *buf
,
3346 unsigned int buflen
, int write_data
)
3348 unsigned int words
= buflen
>> 1;
3350 /* Transfer multiple of 2 bytes */
3352 outsw(ap
->ioaddr
.data_addr
, buf
, words
);
3354 insw(ap
->ioaddr
.data_addr
, buf
, words
);
3356 /* Transfer trailing 1 byte, if any. */
3357 if (unlikely(buflen
& 0x01)) {
3358 u16 align_buf
[1] = { 0 };
3359 unsigned char *trailing_buf
= buf
+ buflen
- 1;
3362 memcpy(align_buf
, trailing_buf
, 1);
3363 outw(le16_to_cpu(align_buf
[0]), ap
->ioaddr
.data_addr
);
3365 align_buf
[0] = cpu_to_le16(inw(ap
->ioaddr
.data_addr
));
3366 memcpy(trailing_buf
, align_buf
, 1);
3372 * ata_data_xfer - Transfer data from/to the data register.
3373 * @ap: port to read/write
3375 * @buflen: buffer length
3376 * @do_write: read/write
3378 * Transfer data from/to the device data register.
3381 * Inherited from caller.
3384 static void ata_data_xfer(struct ata_port
*ap
, unsigned char *buf
,
3385 unsigned int buflen
, int do_write
)
3387 /* Make the crap hardware pay the costs not the good stuff */
3388 if (unlikely(ap
->flags
& ATA_FLAG_IRQ_MASK
)) {
3389 unsigned long flags
;
3390 local_irq_save(flags
);
3391 if (ap
->flags
& ATA_FLAG_MMIO
)
3392 ata_mmio_data_xfer(ap
, buf
, buflen
, do_write
);
3394 ata_pio_data_xfer(ap
, buf
, buflen
, do_write
);
3395 local_irq_restore(flags
);
3397 if (ap
->flags
& ATA_FLAG_MMIO
)
3398 ata_mmio_data_xfer(ap
, buf
, buflen
, do_write
);
3400 ata_pio_data_xfer(ap
, buf
, buflen
, do_write
);
3405 * ata_pio_sector - Transfer ATA_SECT_SIZE (512 bytes) of data.
3406 * @qc: Command on going
3408 * Transfer ATA_SECT_SIZE of data from/to the ATA device.
3411 * Inherited from caller.
3414 static void ata_pio_sector(struct ata_queued_cmd
*qc
)
3416 int do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
);
3417 struct scatterlist
*sg
= qc
->__sg
;
3418 struct ata_port
*ap
= qc
->ap
;
3420 unsigned int offset
;
3423 if (qc
->cursect
== (qc
->nsect
- 1))
3424 ap
->hsm_task_state
= HSM_ST_LAST
;
3426 page
= sg
[qc
->cursg
].page
;
3427 offset
= sg
[qc
->cursg
].offset
+ qc
->cursg_ofs
* ATA_SECT_SIZE
;
3429 /* get the current page and offset */
3430 page
= nth_page(page
, (offset
>> PAGE_SHIFT
));
3431 offset
%= PAGE_SIZE
;
3433 buf
= kmap(page
) + offset
;
3438 if ((qc
->cursg_ofs
* ATA_SECT_SIZE
) == (&sg
[qc
->cursg
])->length
) {
3443 DPRINTK("data %s\n", qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
3445 /* do the actual data transfer */
3446 do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
);
3447 ata_data_xfer(ap
, buf
, ATA_SECT_SIZE
, do_write
);
3453 * __atapi_pio_bytes - Transfer data from/to the ATAPI device.
3454 * @qc: Command on going
3455 * @bytes: number of bytes
3457 * Transfer Transfer data from/to the ATAPI device.
3460 * Inherited from caller.
3464 static void __atapi_pio_bytes(struct ata_queued_cmd
*qc
, unsigned int bytes
)
3466 int do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
);
3467 struct scatterlist
*sg
= qc
->__sg
;
3468 struct ata_port
*ap
= qc
->ap
;
3471 unsigned int offset
, count
;
3473 if (qc
->curbytes
+ bytes
>= qc
->nbytes
)
3474 ap
->hsm_task_state
= HSM_ST_LAST
;
3477 if (unlikely(qc
->cursg
>= qc
->n_elem
)) {
3479 * The end of qc->sg is reached and the device expects
3480 * more data to transfer. In order not to overrun qc->sg
3481 * and fulfill length specified in the byte count register,
3482 * - for read case, discard trailing data from the device
3483 * - for write case, padding zero data to the device
3485 u16 pad_buf
[1] = { 0 };
3486 unsigned int words
= bytes
>> 1;
3489 if (words
) /* warning if bytes > 1 */
3490 printk(KERN_WARNING
"ata%u: %u bytes trailing data\n",
3493 for (i
= 0; i
< words
; i
++)
3494 ata_data_xfer(ap
, (unsigned char*)pad_buf
, 2, do_write
);
3496 ap
->hsm_task_state
= HSM_ST_LAST
;
3500 sg
= &qc
->__sg
[qc
->cursg
];
3503 offset
= sg
->offset
+ qc
->cursg_ofs
;
3505 /* get the current page and offset */
3506 page
= nth_page(page
, (offset
>> PAGE_SHIFT
));
3507 offset
%= PAGE_SIZE
;
3509 /* don't overrun current sg */
3510 count
= min(sg
->length
- qc
->cursg_ofs
, bytes
);
3512 /* don't cross page boundaries */
3513 count
= min(count
, (unsigned int)PAGE_SIZE
- offset
);
3515 buf
= kmap(page
) + offset
;
3518 qc
->curbytes
+= count
;
3519 qc
->cursg_ofs
+= count
;
3521 if (qc
->cursg_ofs
== sg
->length
) {
3526 DPRINTK("data %s\n", qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
3528 /* do the actual data transfer */
3529 ata_data_xfer(ap
, buf
, count
, do_write
);
3538 * atapi_pio_bytes - Transfer data from/to the ATAPI device.
3539 * @qc: Command on going
3541 * Transfer Transfer data from/to the ATAPI device.
3544 * Inherited from caller.
3547 static void atapi_pio_bytes(struct ata_queued_cmd
*qc
)
3549 struct ata_port
*ap
= qc
->ap
;
3550 struct ata_device
*dev
= qc
->dev
;
3551 unsigned int ireason
, bc_lo
, bc_hi
, bytes
;
3552 int i_write
, do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
) ? 1 : 0;
3554 ap
->ops
->tf_read(ap
, &qc
->tf
);
3555 ireason
= qc
->tf
.nsect
;
3556 bc_lo
= qc
->tf
.lbam
;
3557 bc_hi
= qc
->tf
.lbah
;
3558 bytes
= (bc_hi
<< 8) | bc_lo
;
3560 /* shall be cleared to zero, indicating xfer of data */
3561 if (ireason
& (1 << 0))
3564 /* make sure transfer direction matches expected */
3565 i_write
= ((ireason
& (1 << 1)) == 0) ? 1 : 0;
3566 if (do_write
!= i_write
)
3569 __atapi_pio_bytes(qc
, bytes
);
3574 printk(KERN_INFO
"ata%u: dev %u: ATAPI check failed\n",
3575 ap
->id
, dev
->devno
);
3576 qc
->err_mask
|= AC_ERR_HSM
;
3577 ap
->hsm_task_state
= HSM_ST_ERR
;
3581 * ata_pio_block - start PIO on a block
3582 * @ap: the target ata_port
3585 * None. (executing in kernel thread context)
3588 static void ata_pio_block(struct ata_port
*ap
)
3590 struct ata_queued_cmd
*qc
;
3594 * This is purely heuristic. This is a fast path.
3595 * Sometimes when we enter, BSY will be cleared in
3596 * a chk-status or two. If not, the drive is probably seeking
3597 * or something. Snooze for a couple msecs, then
3598 * chk-status again. If still busy, fall back to
3599 * HSM_ST_POLL state.
3601 status
= ata_busy_wait(ap
, ATA_BUSY
, 5);
3602 if (status
& ATA_BUSY
) {
3604 status
= ata_busy_wait(ap
, ATA_BUSY
, 10);
3605 if (status
& ATA_BUSY
) {
3606 ap
->hsm_task_state
= HSM_ST_POLL
;
3607 ap
->pio_task_timeout
= jiffies
+ ATA_TMOUT_PIO
;
3612 qc
= ata_qc_from_tag(ap
, ap
->active_tag
);
3613 WARN_ON(qc
== NULL
);
3616 if (status
& (ATA_ERR
| ATA_DF
)) {
3617 qc
->err_mask
|= AC_ERR_DEV
;
3618 ap
->hsm_task_state
= HSM_ST_ERR
;
3622 /* transfer data if any */
3623 if (is_atapi_taskfile(&qc
->tf
)) {
3624 /* DRQ=0 means no more data to transfer */
3625 if ((status
& ATA_DRQ
) == 0) {
3626 ap
->hsm_task_state
= HSM_ST_LAST
;
3630 atapi_pio_bytes(qc
);
3632 /* handle BSY=0, DRQ=0 as error */
3633 if ((status
& ATA_DRQ
) == 0) {
3634 qc
->err_mask
|= AC_ERR_HSM
;
3635 ap
->hsm_task_state
= HSM_ST_ERR
;
3643 static void ata_pio_error(struct ata_port
*ap
)
3645 struct ata_queued_cmd
*qc
;
3647 qc
= ata_qc_from_tag(ap
, ap
->active_tag
);
3648 WARN_ON(qc
== NULL
);
3650 if (qc
->tf
.command
!= ATA_CMD_PACKET
)
3651 printk(KERN_WARNING
"ata%u: PIO error\n", ap
->id
);
3653 /* make sure qc->err_mask is available to
3654 * know what's wrong and recover
3656 WARN_ON(qc
->err_mask
== 0);
3658 ap
->hsm_task_state
= HSM_ST_IDLE
;
3660 ata_poll_qc_complete(qc
);
3663 static void ata_pio_task(void *_data
)
3665 struct ata_port
*ap
= _data
;
3666 unsigned long timeout
;
3673 switch (ap
->hsm_task_state
) {
3682 qc_completed
= ata_pio_complete(ap
);
3686 case HSM_ST_LAST_POLL
:
3687 timeout
= ata_pio_poll(ap
);
3697 ata_port_queue_task(ap
, ata_pio_task
, ap
, timeout
);
3698 else if (!qc_completed
)
3703 * atapi_packet_task - Write CDB bytes to hardware
3704 * @_data: Port to which ATAPI device is attached.
3706 * When device has indicated its readiness to accept
3707 * a CDB, this function is called. Send the CDB.
3708 * If DMA is to be performed, exit immediately.
3709 * Otherwise, we are in polling mode, so poll
3710 * status under operation succeeds or fails.
3713 * Kernel thread context (may sleep)
3716 static void atapi_packet_task(void *_data
)
3718 struct ata_port
*ap
= _data
;
3719 struct ata_queued_cmd
*qc
;
3722 qc
= ata_qc_from_tag(ap
, ap
->active_tag
);
3723 WARN_ON(qc
== NULL
);
3724 WARN_ON(!(qc
->flags
& ATA_QCFLAG_ACTIVE
));
3726 /* sleep-wait for BSY to clear */
3727 DPRINTK("busy wait\n");
3728 if (ata_busy_sleep(ap
, ATA_TMOUT_CDB_QUICK
, ATA_TMOUT_CDB
)) {
3729 qc
->err_mask
|= AC_ERR_TIMEOUT
;
3733 /* make sure DRQ is set */
3734 status
= ata_chk_status(ap
);
3735 if ((status
& (ATA_BUSY
| ATA_DRQ
)) != ATA_DRQ
) {
3736 qc
->err_mask
|= AC_ERR_HSM
;
3741 DPRINTK("send cdb\n");
3742 WARN_ON(qc
->dev
->cdb_len
< 12);
3744 if (qc
->tf
.protocol
== ATA_PROT_ATAPI_DMA
||
3745 qc
->tf
.protocol
== ATA_PROT_ATAPI_NODATA
) {
3746 unsigned long flags
;
3748 /* Once we're done issuing command and kicking bmdma,
3749 * irq handler takes over. To not lose irq, we need
3750 * to clear NOINTR flag before sending cdb, but
3751 * interrupt handler shouldn't be invoked before we're
3752 * finished. Hence, the following locking.
3754 spin_lock_irqsave(&ap
->host_set
->lock
, flags
);
3755 ap
->flags
&= ~ATA_FLAG_NOINTR
;
3756 ata_data_xfer(ap
, qc
->cdb
, qc
->dev
->cdb_len
, 1);
3757 if (qc
->tf
.protocol
== ATA_PROT_ATAPI_DMA
)
3758 ap
->ops
->bmdma_start(qc
); /* initiate bmdma */
3759 spin_unlock_irqrestore(&ap
->host_set
->lock
, flags
);
3761 ata_data_xfer(ap
, qc
->cdb
, qc
->dev
->cdb_len
, 1);
3763 /* PIO commands are handled by polling */
3764 ap
->hsm_task_state
= HSM_ST
;
3765 ata_port_queue_task(ap
, ata_pio_task
, ap
, 0);
3771 ata_poll_qc_complete(qc
);
3775 * ata_qc_timeout - Handle timeout of queued command
3776 * @qc: Command that timed out
3778 * Some part of the kernel (currently, only the SCSI layer)
3779 * has noticed that the active command on port @ap has not
3780 * completed after a specified length of time. Handle this
3781 * condition by disabling DMA (if necessary) and completing
3782 * transactions, with error if necessary.
3784 * This also handles the case of the "lost interrupt", where
3785 * for some reason (possibly hardware bug, possibly driver bug)
3786 * an interrupt was not delivered to the driver, even though the
3787 * transaction completed successfully.
3790 * Inherited from SCSI layer (none, can sleep)
3793 static void ata_qc_timeout(struct ata_queued_cmd
*qc
)
3795 struct ata_port
*ap
= qc
->ap
;
3796 struct ata_host_set
*host_set
= ap
->host_set
;
3797 u8 host_stat
= 0, drv_stat
;
3798 unsigned long flags
;
3802 ap
->hsm_task_state
= HSM_ST_IDLE
;
3804 spin_lock_irqsave(&host_set
->lock
, flags
);
3806 switch (qc
->tf
.protocol
) {
3809 case ATA_PROT_ATAPI_DMA
:
3810 host_stat
= ap
->ops
->bmdma_status(ap
);
3812 /* before we do anything else, clear DMA-Start bit */
3813 ap
->ops
->bmdma_stop(qc
);
3819 drv_stat
= ata_chk_status(ap
);
3821 /* ack bmdma irq events */
3822 ap
->ops
->irq_clear(ap
);
3824 printk(KERN_ERR
"ata%u: command 0x%x timeout, stat 0x%x host_stat 0x%x\n",
3825 ap
->id
, qc
->tf
.command
, drv_stat
, host_stat
);
3827 /* complete taskfile transaction */
3828 qc
->err_mask
|= ac_err_mask(drv_stat
);
3832 spin_unlock_irqrestore(&host_set
->lock
, flags
);
3834 ata_eh_qc_complete(qc
);
3840 * ata_eng_timeout - Handle timeout of queued command
3841 * @ap: Port on which timed-out command is active
3843 * Some part of the kernel (currently, only the SCSI layer)
3844 * has noticed that the active command on port @ap has not
3845 * completed after a specified length of time. Handle this
3846 * condition by disabling DMA (if necessary) and completing
3847 * transactions, with error if necessary.
3849 * This also handles the case of the "lost interrupt", where
3850 * for some reason (possibly hardware bug, possibly driver bug)
3851 * an interrupt was not delivered to the driver, even though the
3852 * transaction completed successfully.
3855 * Inherited from SCSI layer (none, can sleep)
3858 void ata_eng_timeout(struct ata_port
*ap
)
3862 ata_qc_timeout(ata_qc_from_tag(ap
, ap
->active_tag
));
3868 * ata_qc_new - Request an available ATA command, for queueing
3869 * @ap: Port associated with device @dev
3870 * @dev: Device from whom we request an available command structure
3876 static struct ata_queued_cmd
*ata_qc_new(struct ata_port
*ap
)
3878 struct ata_queued_cmd
*qc
= NULL
;
3881 for (i
= 0; i
< ATA_MAX_QUEUE
; i
++)
3882 if (!test_and_set_bit(i
, &ap
->qactive
)) {
3883 qc
= ata_qc_from_tag(ap
, i
);
3894 * ata_qc_new_init - Request an available ATA command, and initialize it
3895 * @ap: Port associated with device @dev
3896 * @dev: Device from whom we request an available command structure
3902 struct ata_queued_cmd
*ata_qc_new_init(struct ata_port
*ap
,
3903 struct ata_device
*dev
)
3905 struct ata_queued_cmd
*qc
;
3907 qc
= ata_qc_new(ap
);
3920 * ata_qc_free - free unused ata_queued_cmd
3921 * @qc: Command to complete
3923 * Designed to free unused ata_queued_cmd object
3924 * in case something prevents using it.
3927 * spin_lock_irqsave(host_set lock)
3929 void ata_qc_free(struct ata_queued_cmd
*qc
)
3931 struct ata_port
*ap
= qc
->ap
;
3934 WARN_ON(qc
== NULL
); /* ata_qc_from_tag _might_ return NULL */
3938 if (likely(ata_tag_valid(tag
))) {
3939 if (tag
== ap
->active_tag
)
3940 ap
->active_tag
= ATA_TAG_POISON
;
3941 qc
->tag
= ATA_TAG_POISON
;
3942 clear_bit(tag
, &ap
->qactive
);
3946 void __ata_qc_complete(struct ata_queued_cmd
*qc
)
3948 WARN_ON(qc
== NULL
); /* ata_qc_from_tag _might_ return NULL */
3949 WARN_ON(!(qc
->flags
& ATA_QCFLAG_ACTIVE
));
3951 if (likely(qc
->flags
& ATA_QCFLAG_DMAMAP
))
3954 /* atapi: mark qc as inactive to prevent the interrupt handler
3955 * from completing the command twice later, before the error handler
3956 * is called. (when rc != 0 and atapi request sense is needed)
3958 qc
->flags
&= ~ATA_QCFLAG_ACTIVE
;
3960 /* call completion callback */
3961 qc
->complete_fn(qc
);
3964 static inline int ata_should_dma_map(struct ata_queued_cmd
*qc
)
3966 struct ata_port
*ap
= qc
->ap
;
3968 switch (qc
->tf
.protocol
) {
3970 case ATA_PROT_ATAPI_DMA
:
3973 case ATA_PROT_ATAPI
:
3975 if (ap
->flags
& ATA_FLAG_PIO_DMA
)
3988 * ata_qc_issue - issue taskfile to device
3989 * @qc: command to issue to device
3991 * Prepare an ATA command to submission to device.
3992 * This includes mapping the data into a DMA-able
3993 * area, filling in the S/G table, and finally
3994 * writing the taskfile to hardware, starting the command.
3997 * spin_lock_irqsave(host_set lock)
3999 void ata_qc_issue(struct ata_queued_cmd
*qc
)
4001 struct ata_port
*ap
= qc
->ap
;
4003 qc
->ap
->active_tag
= qc
->tag
;
4004 qc
->flags
|= ATA_QCFLAG_ACTIVE
;
4006 if (ata_should_dma_map(qc
)) {
4007 if (qc
->flags
& ATA_QCFLAG_SG
) {
4008 if (ata_sg_setup(qc
))
4010 } else if (qc
->flags
& ATA_QCFLAG_SINGLE
) {
4011 if (ata_sg_setup_one(qc
))
4015 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
4018 ap
->ops
->qc_prep(qc
);
4020 qc
->err_mask
|= ap
->ops
->qc_issue(qc
);
4021 if (unlikely(qc
->err_mask
))
4026 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
4027 qc
->err_mask
|= AC_ERR_SYSTEM
;
4029 ata_qc_complete(qc
);
4033 * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner
4034 * @qc: command to issue to device
4036 * Using various libata functions and hooks, this function
4037 * starts an ATA command. ATA commands are grouped into
4038 * classes called "protocols", and issuing each type of protocol
4039 * is slightly different.
4041 * May be used as the qc_issue() entry in ata_port_operations.
4044 * spin_lock_irqsave(host_set lock)
4047 * Zero on success, AC_ERR_* mask on failure
4050 unsigned int ata_qc_issue_prot(struct ata_queued_cmd
*qc
)
4052 struct ata_port
*ap
= qc
->ap
;
4054 ata_dev_select(ap
, qc
->dev
->devno
, 1, 0);
4056 switch (qc
->tf
.protocol
) {
4057 case ATA_PROT_NODATA
:
4058 ata_tf_to_host(ap
, &qc
->tf
);
4062 ap
->ops
->tf_load(ap
, &qc
->tf
); /* load tf registers */
4063 ap
->ops
->bmdma_setup(qc
); /* set up bmdma */
4064 ap
->ops
->bmdma_start(qc
); /* initiate bmdma */
4067 case ATA_PROT_PIO
: /* load tf registers, initiate polling pio */
4068 ata_qc_set_polling(qc
);
4069 ata_tf_to_host(ap
, &qc
->tf
);
4070 ap
->hsm_task_state
= HSM_ST
;
4071 ata_port_queue_task(ap
, ata_pio_task
, ap
, 0);
4074 case ATA_PROT_ATAPI
:
4075 ata_qc_set_polling(qc
);
4076 ata_tf_to_host(ap
, &qc
->tf
);
4077 ata_port_queue_task(ap
, atapi_packet_task
, ap
, 0);
4080 case ATA_PROT_ATAPI_NODATA
:
4081 ap
->flags
|= ATA_FLAG_NOINTR
;
4082 ata_tf_to_host(ap
, &qc
->tf
);
4083 ata_port_queue_task(ap
, atapi_packet_task
, ap
, 0);
4086 case ATA_PROT_ATAPI_DMA
:
4087 ap
->flags
|= ATA_FLAG_NOINTR
;
4088 ap
->ops
->tf_load(ap
, &qc
->tf
); /* load tf registers */
4089 ap
->ops
->bmdma_setup(qc
); /* set up bmdma */
4090 ata_port_queue_task(ap
, atapi_packet_task
, ap
, 0);
4095 return AC_ERR_SYSTEM
;
4102 * ata_host_intr - Handle host interrupt for given (port, task)
4103 * @ap: Port on which interrupt arrived (possibly...)
4104 * @qc: Taskfile currently active in engine
4106 * Handle host interrupt for given queued command. Currently,
4107 * only DMA interrupts are handled. All other commands are
4108 * handled via polling with interrupts disabled (nIEN bit).
4111 * spin_lock_irqsave(host_set lock)
4114 * One if interrupt was handled, zero if not (shared irq).
4117 inline unsigned int ata_host_intr (struct ata_port
*ap
,
4118 struct ata_queued_cmd
*qc
)
4120 u8 status
, host_stat
;
4122 switch (qc
->tf
.protocol
) {
4125 case ATA_PROT_ATAPI_DMA
:
4126 case ATA_PROT_ATAPI
:
4127 /* check status of DMA engine */
4128 host_stat
= ap
->ops
->bmdma_status(ap
);
4129 VPRINTK("ata%u: host_stat 0x%X\n", ap
->id
, host_stat
);
4131 /* if it's not our irq... */
4132 if (!(host_stat
& ATA_DMA_INTR
))
4135 /* before we do anything else, clear DMA-Start bit */
4136 ap
->ops
->bmdma_stop(qc
);
4140 case ATA_PROT_ATAPI_NODATA
:
4141 case ATA_PROT_NODATA
:
4142 /* check altstatus */
4143 status
= ata_altstatus(ap
);
4144 if (status
& ATA_BUSY
)
4147 /* check main status, clearing INTRQ */
4148 status
= ata_chk_status(ap
);
4149 if (unlikely(status
& ATA_BUSY
))
4151 DPRINTK("ata%u: protocol %d (dev_stat 0x%X)\n",
4152 ap
->id
, qc
->tf
.protocol
, status
);
4154 /* ack bmdma irq events */
4155 ap
->ops
->irq_clear(ap
);
4157 /* complete taskfile transaction */
4158 qc
->err_mask
|= ac_err_mask(status
);
4159 ata_qc_complete(qc
);
4166 return 1; /* irq handled */
4169 ap
->stats
.idle_irq
++;
4172 if ((ap
->stats
.idle_irq
% 1000) == 0) {
4173 ata_irq_ack(ap
, 0); /* debug trap */
4174 printk(KERN_WARNING
"ata%d: irq trap\n", ap
->id
);
4178 return 0; /* irq not handled */
4182 * ata_interrupt - Default ATA host interrupt handler
4183 * @irq: irq line (unused)
4184 * @dev_instance: pointer to our ata_host_set information structure
4187 * Default interrupt handler for PCI IDE devices. Calls
4188 * ata_host_intr() for each port that is not disabled.
4191 * Obtains host_set lock during operation.
4194 * IRQ_NONE or IRQ_HANDLED.
4197 irqreturn_t
ata_interrupt (int irq
, void *dev_instance
, struct pt_regs
*regs
)
4199 struct ata_host_set
*host_set
= dev_instance
;
4201 unsigned int handled
= 0;
4202 unsigned long flags
;
4204 /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */
4205 spin_lock_irqsave(&host_set
->lock
, flags
);
4207 for (i
= 0; i
< host_set
->n_ports
; i
++) {
4208 struct ata_port
*ap
;
4210 ap
= host_set
->ports
[i
];
4212 !(ap
->flags
& (ATA_FLAG_PORT_DISABLED
| ATA_FLAG_NOINTR
))) {
4213 struct ata_queued_cmd
*qc
;
4215 qc
= ata_qc_from_tag(ap
, ap
->active_tag
);
4216 if (qc
&& (!(qc
->tf
.ctl
& ATA_NIEN
)) &&
4217 (qc
->flags
& ATA_QCFLAG_ACTIVE
))
4218 handled
|= ata_host_intr(ap
, qc
);
4222 spin_unlock_irqrestore(&host_set
->lock
, flags
);
4224 return IRQ_RETVAL(handled
);
4229 * Execute a 'simple' command, that only consists of the opcode 'cmd' itself,
4230 * without filling any other registers
4232 static int ata_do_simple_cmd(struct ata_port
*ap
, struct ata_device
*dev
,
4235 struct ata_taskfile tf
;
4238 ata_tf_init(ap
, &tf
, dev
->devno
);
4241 tf
.flags
|= ATA_TFLAG_DEVICE
;
4242 tf
.protocol
= ATA_PROT_NODATA
;
4244 err
= ata_exec_internal(ap
, dev
, &tf
, DMA_NONE
, NULL
, 0);
4246 printk(KERN_ERR
"%s: ata command failed: %d\n",
4252 static int ata_flush_cache(struct ata_port
*ap
, struct ata_device
*dev
)
4256 if (!ata_try_flush_cache(dev
))
4259 if (ata_id_has_flush_ext(dev
->id
))
4260 cmd
= ATA_CMD_FLUSH_EXT
;
4262 cmd
= ATA_CMD_FLUSH
;
4264 return ata_do_simple_cmd(ap
, dev
, cmd
);
4267 static int ata_standby_drive(struct ata_port
*ap
, struct ata_device
*dev
)
4269 return ata_do_simple_cmd(ap
, dev
, ATA_CMD_STANDBYNOW1
);
4272 static int ata_start_drive(struct ata_port
*ap
, struct ata_device
*dev
)
4274 return ata_do_simple_cmd(ap
, dev
, ATA_CMD_IDLEIMMEDIATE
);
4278 * ata_device_resume - wakeup a previously suspended devices
4279 * @ap: port the device is connected to
4280 * @dev: the device to resume
4282 * Kick the drive back into action, by sending it an idle immediate
4283 * command and making sure its transfer mode matches between drive
4287 int ata_device_resume(struct ata_port
*ap
, struct ata_device
*dev
)
4289 if (ap
->flags
& ATA_FLAG_SUSPENDED
) {
4290 ap
->flags
&= ~ATA_FLAG_SUSPENDED
;
4293 if (!ata_dev_present(dev
))
4295 if (dev
->class == ATA_DEV_ATA
)
4296 ata_start_drive(ap
, dev
);
4302 * ata_device_suspend - prepare a device for suspend
4303 * @ap: port the device is connected to
4304 * @dev: the device to suspend
4306 * Flush the cache on the drive, if appropriate, then issue a
4307 * standbynow command.
4309 int ata_device_suspend(struct ata_port
*ap
, struct ata_device
*dev
, pm_message_t state
)
4311 if (!ata_dev_present(dev
))
4313 if (dev
->class == ATA_DEV_ATA
)
4314 ata_flush_cache(ap
, dev
);
4316 if (state
.event
!= PM_EVENT_FREEZE
)
4317 ata_standby_drive(ap
, dev
);
4318 ap
->flags
|= ATA_FLAG_SUSPENDED
;
4323 * ata_port_start - Set port up for dma.
4324 * @ap: Port to initialize
4326 * Called just after data structures for each port are
4327 * initialized. Allocates space for PRD table.
4329 * May be used as the port_start() entry in ata_port_operations.
4332 * Inherited from caller.
4335 int ata_port_start (struct ata_port
*ap
)
4337 struct device
*dev
= ap
->dev
;
4340 ap
->prd
= dma_alloc_coherent(dev
, ATA_PRD_TBL_SZ
, &ap
->prd_dma
, GFP_KERNEL
);
4344 rc
= ata_pad_alloc(ap
, dev
);
4346 dma_free_coherent(dev
, ATA_PRD_TBL_SZ
, ap
->prd
, ap
->prd_dma
);
4350 DPRINTK("prd alloc, virt %p, dma %llx\n", ap
->prd
, (unsigned long long) ap
->prd_dma
);
4357 * ata_port_stop - Undo ata_port_start()
4358 * @ap: Port to shut down
4360 * Frees the PRD table.
4362 * May be used as the port_stop() entry in ata_port_operations.
4365 * Inherited from caller.
4368 void ata_port_stop (struct ata_port
*ap
)
4370 struct device
*dev
= ap
->dev
;
4372 dma_free_coherent(dev
, ATA_PRD_TBL_SZ
, ap
->prd
, ap
->prd_dma
);
4373 ata_pad_free(ap
, dev
);
4376 void ata_host_stop (struct ata_host_set
*host_set
)
4378 if (host_set
->mmio_base
)
4379 iounmap(host_set
->mmio_base
);
4384 * ata_host_remove - Unregister SCSI host structure with upper layers
4385 * @ap: Port to unregister
4386 * @do_unregister: 1 if we fully unregister, 0 to just stop the port
4389 * Inherited from caller.
4392 static void ata_host_remove(struct ata_port
*ap
, unsigned int do_unregister
)
4394 struct Scsi_Host
*sh
= ap
->host
;
4399 scsi_remove_host(sh
);
4401 ap
->ops
->port_stop(ap
);
4405 * ata_host_init - Initialize an ata_port structure
4406 * @ap: Structure to initialize
4407 * @host: associated SCSI mid-layer structure
4408 * @host_set: Collection of hosts to which @ap belongs
4409 * @ent: Probe information provided by low-level driver
4410 * @port_no: Port number associated with this ata_port
4412 * Initialize a new ata_port structure, and its associated
4416 * Inherited from caller.
4419 static void ata_host_init(struct ata_port
*ap
, struct Scsi_Host
*host
,
4420 struct ata_host_set
*host_set
,
4421 const struct ata_probe_ent
*ent
, unsigned int port_no
)
4427 host
->max_channel
= 1;
4428 host
->unique_id
= ata_unique_id
++;
4429 host
->max_cmd_len
= 12;
4431 ap
->flags
= ATA_FLAG_PORT_DISABLED
;
4432 ap
->id
= host
->unique_id
;
4434 ap
->ctl
= ATA_DEVCTL_OBS
;
4435 ap
->host_set
= host_set
;
4437 ap
->port_no
= port_no
;
4439 ent
->legacy_mode
? ent
->hard_port_no
: port_no
;
4440 ap
->pio_mask
= ent
->pio_mask
;
4441 ap
->mwdma_mask
= ent
->mwdma_mask
;
4442 ap
->udma_mask
= ent
->udma_mask
;
4443 ap
->flags
|= ent
->host_flags
;
4444 ap
->ops
= ent
->port_ops
;
4445 ap
->cbl
= ATA_CBL_NONE
;
4446 ap
->active_tag
= ATA_TAG_POISON
;
4447 ap
->last_ctl
= 0xFF;
4449 INIT_WORK(&ap
->port_task
, NULL
, NULL
);
4450 INIT_LIST_HEAD(&ap
->eh_done_q
);
4452 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
4453 struct ata_device
*dev
= &ap
->device
[i
];
4455 dev
->pio_mask
= UINT_MAX
;
4456 dev
->mwdma_mask
= UINT_MAX
;
4457 dev
->udma_mask
= UINT_MAX
;
4461 ap
->stats
.unhandled_irq
= 1;
4462 ap
->stats
.idle_irq
= 1;
4465 memcpy(&ap
->ioaddr
, &ent
->port
[port_no
], sizeof(struct ata_ioports
));
4469 * ata_host_add - Attach low-level ATA driver to system
4470 * @ent: Information provided by low-level driver
4471 * @host_set: Collections of ports to which we add
4472 * @port_no: Port number associated with this host
4474 * Attach low-level ATA driver to system.
4477 * PCI/etc. bus probe sem.
4480 * New ata_port on success, for NULL on error.
4483 static struct ata_port
* ata_host_add(const struct ata_probe_ent
*ent
,
4484 struct ata_host_set
*host_set
,
4485 unsigned int port_no
)
4487 struct Scsi_Host
*host
;
4488 struct ata_port
*ap
;
4493 if (!ent
->port_ops
->probe_reset
&&
4494 !(ent
->host_flags
& (ATA_FLAG_SATA_RESET
| ATA_FLAG_SRST
))) {
4495 printk(KERN_ERR
"ata%u: no reset mechanism available\n",
4500 host
= scsi_host_alloc(ent
->sht
, sizeof(struct ata_port
));
4504 host
->transportt
= &ata_scsi_transport_template
;
4506 ap
= (struct ata_port
*) &host
->hostdata
[0];
4508 ata_host_init(ap
, host
, host_set
, ent
, port_no
);
4510 rc
= ap
->ops
->port_start(ap
);
4517 scsi_host_put(host
);
4522 * ata_device_add - Register hardware device with ATA and SCSI layers
4523 * @ent: Probe information describing hardware device to be registered
4525 * This function processes the information provided in the probe
4526 * information struct @ent, allocates the necessary ATA and SCSI
4527 * host information structures, initializes them, and registers
4528 * everything with requisite kernel subsystems.
4530 * This function requests irqs, probes the ATA bus, and probes
4534 * PCI/etc. bus probe sem.
4537 * Number of ports registered. Zero on error (no ports registered).
4540 int ata_device_add(const struct ata_probe_ent
*ent
)
4542 unsigned int count
= 0, i
;
4543 struct device
*dev
= ent
->dev
;
4544 struct ata_host_set
*host_set
;
4547 /* alloc a container for our list of ATA ports (buses) */
4548 host_set
= kzalloc(sizeof(struct ata_host_set
) +
4549 (ent
->n_ports
* sizeof(void *)), GFP_KERNEL
);
4552 spin_lock_init(&host_set
->lock
);
4554 host_set
->dev
= dev
;
4555 host_set
->n_ports
= ent
->n_ports
;
4556 host_set
->irq
= ent
->irq
;
4557 host_set
->mmio_base
= ent
->mmio_base
;
4558 host_set
->private_data
= ent
->private_data
;
4559 host_set
->ops
= ent
->port_ops
;
4560 host_set
->flags
= ent
->host_set_flags
;
4562 /* register each port bound to this device */
4563 for (i
= 0; i
< ent
->n_ports
; i
++) {
4564 struct ata_port
*ap
;
4565 unsigned long xfer_mode_mask
;
4567 ap
= ata_host_add(ent
, host_set
, i
);
4571 host_set
->ports
[i
] = ap
;
4572 xfer_mode_mask
=(ap
->udma_mask
<< ATA_SHIFT_UDMA
) |
4573 (ap
->mwdma_mask
<< ATA_SHIFT_MWDMA
) |
4574 (ap
->pio_mask
<< ATA_SHIFT_PIO
);
4576 /* print per-port info to dmesg */
4577 printk(KERN_INFO
"ata%u: %cATA max %s cmd 0x%lX ctl 0x%lX "
4578 "bmdma 0x%lX irq %lu\n",
4580 ap
->flags
& ATA_FLAG_SATA
? 'S' : 'P',
4581 ata_mode_string(xfer_mode_mask
),
4582 ap
->ioaddr
.cmd_addr
,
4583 ap
->ioaddr
.ctl_addr
,
4584 ap
->ioaddr
.bmdma_addr
,
4588 host_set
->ops
->irq_clear(ap
);
4595 /* obtain irq, that is shared between channels */
4596 if (request_irq(ent
->irq
, ent
->port_ops
->irq_handler
, ent
->irq_flags
,
4597 DRV_NAME
, host_set
))
4600 /* perform each probe synchronously */
4601 DPRINTK("probe begin\n");
4602 for (i
= 0; i
< count
; i
++) {
4603 struct ata_port
*ap
;
4606 ap
= host_set
->ports
[i
];
4608 DPRINTK("ata%u: bus probe begin\n", ap
->id
);
4609 rc
= ata_bus_probe(ap
);
4610 DPRINTK("ata%u: bus probe end\n", ap
->id
);
4613 /* FIXME: do something useful here?
4614 * Current libata behavior will
4615 * tear down everything when
4616 * the module is removed
4617 * or the h/w is unplugged.
4621 rc
= scsi_add_host(ap
->host
, dev
);
4623 printk(KERN_ERR
"ata%u: scsi_add_host failed\n",
4625 /* FIXME: do something useful here */
4626 /* FIXME: handle unconditional calls to
4627 * scsi_scan_host and ata_host_remove, below,
4633 /* probes are done, now scan each port's disk(s) */
4634 DPRINTK("host probe begin\n");
4635 for (i
= 0; i
< count
; i
++) {
4636 struct ata_port
*ap
= host_set
->ports
[i
];
4638 ata_scsi_scan_host(ap
);
4641 dev_set_drvdata(dev
, host_set
);
4643 VPRINTK("EXIT, returning %u\n", ent
->n_ports
);
4644 return ent
->n_ports
; /* success */
4647 for (i
= 0; i
< count
; i
++) {
4648 ata_host_remove(host_set
->ports
[i
], 1);
4649 scsi_host_put(host_set
->ports
[i
]->host
);
4653 VPRINTK("EXIT, returning 0\n");
4658 * ata_host_set_remove - PCI layer callback for device removal
4659 * @host_set: ATA host set that was removed
4661 * Unregister all objects associated with this host set. Free those
4665 * Inherited from calling layer (may sleep).
4668 void ata_host_set_remove(struct ata_host_set
*host_set
)
4670 struct ata_port
*ap
;
4673 for (i
= 0; i
< host_set
->n_ports
; i
++) {
4674 ap
= host_set
->ports
[i
];
4675 scsi_remove_host(ap
->host
);
4678 free_irq(host_set
->irq
, host_set
);
4680 for (i
= 0; i
< host_set
->n_ports
; i
++) {
4681 ap
= host_set
->ports
[i
];
4683 ata_scsi_release(ap
->host
);
4685 if ((ap
->flags
& ATA_FLAG_NO_LEGACY
) == 0) {
4686 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
4688 if (ioaddr
->cmd_addr
== 0x1f0)
4689 release_region(0x1f0, 8);
4690 else if (ioaddr
->cmd_addr
== 0x170)
4691 release_region(0x170, 8);
4694 scsi_host_put(ap
->host
);
4697 if (host_set
->ops
->host_stop
)
4698 host_set
->ops
->host_stop(host_set
);
4704 * ata_scsi_release - SCSI layer callback hook for host unload
4705 * @host: libata host to be unloaded
4707 * Performs all duties necessary to shut down a libata port...
4708 * Kill port kthread, disable port, and release resources.
4711 * Inherited from SCSI layer.
4717 int ata_scsi_release(struct Scsi_Host
*host
)
4719 struct ata_port
*ap
= (struct ata_port
*) &host
->hostdata
[0];
4724 ap
->ops
->port_disable(ap
);
4725 ata_host_remove(ap
, 0);
4726 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
4727 kfree(ap
->device
[i
].id
);
4734 * ata_std_ports - initialize ioaddr with standard port offsets.
4735 * @ioaddr: IO address structure to be initialized
4737 * Utility function which initializes data_addr, error_addr,
4738 * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr,
4739 * device_addr, status_addr, and command_addr to standard offsets
4740 * relative to cmd_addr.
4742 * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr.
4745 void ata_std_ports(struct ata_ioports
*ioaddr
)
4747 ioaddr
->data_addr
= ioaddr
->cmd_addr
+ ATA_REG_DATA
;
4748 ioaddr
->error_addr
= ioaddr
->cmd_addr
+ ATA_REG_ERR
;
4749 ioaddr
->feature_addr
= ioaddr
->cmd_addr
+ ATA_REG_FEATURE
;
4750 ioaddr
->nsect_addr
= ioaddr
->cmd_addr
+ ATA_REG_NSECT
;
4751 ioaddr
->lbal_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAL
;
4752 ioaddr
->lbam_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAM
;
4753 ioaddr
->lbah_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAH
;
4754 ioaddr
->device_addr
= ioaddr
->cmd_addr
+ ATA_REG_DEVICE
;
4755 ioaddr
->status_addr
= ioaddr
->cmd_addr
+ ATA_REG_STATUS
;
4756 ioaddr
->command_addr
= ioaddr
->cmd_addr
+ ATA_REG_CMD
;
4762 void ata_pci_host_stop (struct ata_host_set
*host_set
)
4764 struct pci_dev
*pdev
= to_pci_dev(host_set
->dev
);
4766 pci_iounmap(pdev
, host_set
->mmio_base
);
4770 * ata_pci_remove_one - PCI layer callback for device removal
4771 * @pdev: PCI device that was removed
4773 * PCI layer indicates to libata via this hook that
4774 * hot-unplug or module unload event has occurred.
4775 * Handle this by unregistering all objects associated
4776 * with this PCI device. Free those objects. Then finally
4777 * release PCI resources and disable device.
4780 * Inherited from PCI layer (may sleep).
4783 void ata_pci_remove_one (struct pci_dev
*pdev
)
4785 struct device
*dev
= pci_dev_to_dev(pdev
);
4786 struct ata_host_set
*host_set
= dev_get_drvdata(dev
);
4788 ata_host_set_remove(host_set
);
4789 pci_release_regions(pdev
);
4790 pci_disable_device(pdev
);
4791 dev_set_drvdata(dev
, NULL
);
4794 /* move to PCI subsystem */
4795 int pci_test_config_bits(struct pci_dev
*pdev
, const struct pci_bits
*bits
)
4797 unsigned long tmp
= 0;
4799 switch (bits
->width
) {
4802 pci_read_config_byte(pdev
, bits
->reg
, &tmp8
);
4808 pci_read_config_word(pdev
, bits
->reg
, &tmp16
);
4814 pci_read_config_dword(pdev
, bits
->reg
, &tmp32
);
4825 return (tmp
== bits
->val
) ? 1 : 0;
4828 int ata_pci_device_suspend(struct pci_dev
*pdev
, pm_message_t state
)
4830 pci_save_state(pdev
);
4831 pci_disable_device(pdev
);
4832 pci_set_power_state(pdev
, PCI_D3hot
);
4836 int ata_pci_device_resume(struct pci_dev
*pdev
)
4838 pci_set_power_state(pdev
, PCI_D0
);
4839 pci_restore_state(pdev
);
4840 pci_enable_device(pdev
);
4841 pci_set_master(pdev
);
4844 #endif /* CONFIG_PCI */
4847 static int __init
ata_init(void)
4849 ata_wq
= create_workqueue("ata");
4853 printk(KERN_DEBUG
"libata version " DRV_VERSION
" loaded.\n");
4857 static void __exit
ata_exit(void)
4859 destroy_workqueue(ata_wq
);
4862 module_init(ata_init
);
4863 module_exit(ata_exit
);
4865 static unsigned long ratelimit_time
;
4866 static spinlock_t ata_ratelimit_lock
= SPIN_LOCK_UNLOCKED
;
4868 int ata_ratelimit(void)
4871 unsigned long flags
;
4873 spin_lock_irqsave(&ata_ratelimit_lock
, flags
);
4875 if (time_after(jiffies
, ratelimit_time
)) {
4877 ratelimit_time
= jiffies
+ (HZ
/5);
4881 spin_unlock_irqrestore(&ata_ratelimit_lock
, flags
);
4887 * libata is essentially a library of internal helper functions for
4888 * low-level ATA host controller drivers. As such, the API/ABI is
4889 * likely to change as new drivers are added and updated.
4890 * Do not depend on ABI/API stability.
4893 EXPORT_SYMBOL_GPL(ata_std_bios_param
);
4894 EXPORT_SYMBOL_GPL(ata_std_ports
);
4895 EXPORT_SYMBOL_GPL(ata_device_add
);
4896 EXPORT_SYMBOL_GPL(ata_host_set_remove
);
4897 EXPORT_SYMBOL_GPL(ata_sg_init
);
4898 EXPORT_SYMBOL_GPL(ata_sg_init_one
);
4899 EXPORT_SYMBOL_GPL(__ata_qc_complete
);
4900 EXPORT_SYMBOL_GPL(ata_qc_issue_prot
);
4901 EXPORT_SYMBOL_GPL(ata_eng_timeout
);
4902 EXPORT_SYMBOL_GPL(ata_tf_load
);
4903 EXPORT_SYMBOL_GPL(ata_tf_read
);
4904 EXPORT_SYMBOL_GPL(ata_noop_dev_select
);
4905 EXPORT_SYMBOL_GPL(ata_std_dev_select
);
4906 EXPORT_SYMBOL_GPL(ata_tf_to_fis
);
4907 EXPORT_SYMBOL_GPL(ata_tf_from_fis
);
4908 EXPORT_SYMBOL_GPL(ata_check_status
);
4909 EXPORT_SYMBOL_GPL(ata_altstatus
);
4910 EXPORT_SYMBOL_GPL(ata_exec_command
);
4911 EXPORT_SYMBOL_GPL(ata_port_start
);
4912 EXPORT_SYMBOL_GPL(ata_port_stop
);
4913 EXPORT_SYMBOL_GPL(ata_host_stop
);
4914 EXPORT_SYMBOL_GPL(ata_interrupt
);
4915 EXPORT_SYMBOL_GPL(ata_qc_prep
);
4916 EXPORT_SYMBOL_GPL(ata_noop_qc_prep
);
4917 EXPORT_SYMBOL_GPL(ata_bmdma_setup
);
4918 EXPORT_SYMBOL_GPL(ata_bmdma_start
);
4919 EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear
);
4920 EXPORT_SYMBOL_GPL(ata_bmdma_status
);
4921 EXPORT_SYMBOL_GPL(ata_bmdma_stop
);
4922 EXPORT_SYMBOL_GPL(ata_port_probe
);
4923 EXPORT_SYMBOL_GPL(sata_phy_reset
);
4924 EXPORT_SYMBOL_GPL(__sata_phy_reset
);
4925 EXPORT_SYMBOL_GPL(ata_bus_reset
);
4926 EXPORT_SYMBOL_GPL(ata_std_probeinit
);
4927 EXPORT_SYMBOL_GPL(ata_std_softreset
);
4928 EXPORT_SYMBOL_GPL(sata_std_hardreset
);
4929 EXPORT_SYMBOL_GPL(ata_std_postreset
);
4930 EXPORT_SYMBOL_GPL(ata_std_probe_reset
);
4931 EXPORT_SYMBOL_GPL(ata_drive_probe_reset
);
4932 EXPORT_SYMBOL_GPL(ata_dev_revalidate
);
4933 EXPORT_SYMBOL_GPL(ata_dev_classify
);
4934 EXPORT_SYMBOL_GPL(ata_dev_pair
);
4935 EXPORT_SYMBOL_GPL(ata_port_disable
);
4936 EXPORT_SYMBOL_GPL(ata_ratelimit
);
4937 EXPORT_SYMBOL_GPL(ata_busy_sleep
);
4938 EXPORT_SYMBOL_GPL(ata_port_queue_task
);
4939 EXPORT_SYMBOL_GPL(ata_scsi_ioctl
);
4940 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd
);
4941 EXPORT_SYMBOL_GPL(ata_scsi_slave_config
);
4942 EXPORT_SYMBOL_GPL(ata_scsi_release
);
4943 EXPORT_SYMBOL_GPL(ata_host_intr
);
4944 EXPORT_SYMBOL_GPL(ata_id_string
);
4945 EXPORT_SYMBOL_GPL(ata_id_c_string
);
4946 EXPORT_SYMBOL_GPL(ata_scsi_simulate
);
4947 EXPORT_SYMBOL_GPL(ata_eh_qc_complete
);
4948 EXPORT_SYMBOL_GPL(ata_eh_qc_retry
);
4950 EXPORT_SYMBOL_GPL(ata_pio_need_iordy
);
4951 EXPORT_SYMBOL_GPL(ata_timing_compute
);
4952 EXPORT_SYMBOL_GPL(ata_timing_merge
);
4955 EXPORT_SYMBOL_GPL(pci_test_config_bits
);
4956 EXPORT_SYMBOL_GPL(ata_pci_host_stop
);
4957 EXPORT_SYMBOL_GPL(ata_pci_init_native_mode
);
4958 EXPORT_SYMBOL_GPL(ata_pci_init_one
);
4959 EXPORT_SYMBOL_GPL(ata_pci_remove_one
);
4960 EXPORT_SYMBOL_GPL(ata_pci_device_suspend
);
4961 EXPORT_SYMBOL_GPL(ata_pci_device_resume
);
4962 EXPORT_SYMBOL_GPL(ata_pci_default_filter
);
4963 EXPORT_SYMBOL_GPL(ata_pci_clear_simplex
);
4964 #endif /* CONFIG_PCI */
4966 EXPORT_SYMBOL_GPL(ata_device_suspend
);
4967 EXPORT_SYMBOL_GPL(ata_device_resume
);
4968 EXPORT_SYMBOL_GPL(ata_scsi_device_suspend
);
4969 EXPORT_SYMBOL_GPL(ata_scsi_device_resume
);