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_device
*dev
,
65 u16 heads
, u16 sectors
);
66 static unsigned int ata_dev_set_xfermode(struct ata_device
*dev
);
67 static void ata_dev_xfermask(struct ata_device
*dev
);
69 static unsigned int ata_unique_id
= 1;
70 static struct workqueue_struct
*ata_wq
;
72 int atapi_enabled
= 1;
73 module_param(atapi_enabled
, int, 0444);
74 MODULE_PARM_DESC(atapi_enabled
, "Enable discovery of ATAPI devices (0=off, 1=on)");
77 module_param(atapi_dmadir
, int, 0444);
78 MODULE_PARM_DESC(atapi_dmadir
, "Enable ATAPI DMADIR bridge support (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 const char *sata_spd_string(unsigned int spd
)
402 static const char * const spd_str
[] = {
407 if (spd
== 0 || (spd
- 1) >= ARRAY_SIZE(spd_str
))
409 return spd_str
[spd
- 1];
412 void ata_dev_disable(struct ata_device
*dev
)
414 if (ata_dev_enabled(dev
)) {
415 ata_dev_printk(dev
, KERN_WARNING
, "disabled\n");
421 * ata_pio_devchk - PATA device presence detection
422 * @ap: ATA channel to examine
423 * @device: Device to examine (starting at zero)
425 * This technique was originally described in
426 * Hale Landis's ATADRVR (www.ata-atapi.com), and
427 * later found its way into the ATA/ATAPI spec.
429 * Write a pattern to the ATA shadow registers,
430 * and if a device is present, it will respond by
431 * correctly storing and echoing back the
432 * ATA shadow register contents.
438 static unsigned int ata_pio_devchk(struct ata_port
*ap
,
441 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
444 ap
->ops
->dev_select(ap
, device
);
446 outb(0x55, ioaddr
->nsect_addr
);
447 outb(0xaa, ioaddr
->lbal_addr
);
449 outb(0xaa, ioaddr
->nsect_addr
);
450 outb(0x55, ioaddr
->lbal_addr
);
452 outb(0x55, ioaddr
->nsect_addr
);
453 outb(0xaa, ioaddr
->lbal_addr
);
455 nsect
= inb(ioaddr
->nsect_addr
);
456 lbal
= inb(ioaddr
->lbal_addr
);
458 if ((nsect
== 0x55) && (lbal
== 0xaa))
459 return 1; /* we found a device */
461 return 0; /* nothing found */
465 * ata_mmio_devchk - PATA device presence detection
466 * @ap: ATA channel to examine
467 * @device: Device to examine (starting at zero)
469 * This technique was originally described in
470 * Hale Landis's ATADRVR (www.ata-atapi.com), and
471 * later found its way into the ATA/ATAPI spec.
473 * Write a pattern to the ATA shadow registers,
474 * and if a device is present, it will respond by
475 * correctly storing and echoing back the
476 * ATA shadow register contents.
482 static unsigned int ata_mmio_devchk(struct ata_port
*ap
,
485 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
488 ap
->ops
->dev_select(ap
, device
);
490 writeb(0x55, (void __iomem
*) ioaddr
->nsect_addr
);
491 writeb(0xaa, (void __iomem
*) ioaddr
->lbal_addr
);
493 writeb(0xaa, (void __iomem
*) ioaddr
->nsect_addr
);
494 writeb(0x55, (void __iomem
*) ioaddr
->lbal_addr
);
496 writeb(0x55, (void __iomem
*) ioaddr
->nsect_addr
);
497 writeb(0xaa, (void __iomem
*) ioaddr
->lbal_addr
);
499 nsect
= readb((void __iomem
*) ioaddr
->nsect_addr
);
500 lbal
= readb((void __iomem
*) ioaddr
->lbal_addr
);
502 if ((nsect
== 0x55) && (lbal
== 0xaa))
503 return 1; /* we found a device */
505 return 0; /* nothing found */
509 * ata_devchk - PATA device presence detection
510 * @ap: ATA channel to examine
511 * @device: Device to examine (starting at zero)
513 * Dispatch ATA device presence detection, depending
514 * on whether we are using PIO or MMIO to talk to the
515 * ATA shadow registers.
521 static unsigned int ata_devchk(struct ata_port
*ap
,
524 if (ap
->flags
& ATA_FLAG_MMIO
)
525 return ata_mmio_devchk(ap
, device
);
526 return ata_pio_devchk(ap
, device
);
530 * ata_dev_classify - determine device type based on ATA-spec signature
531 * @tf: ATA taskfile register set for device to be identified
533 * Determine from taskfile register contents whether a device is
534 * ATA or ATAPI, as per "Signature and persistence" section
535 * of ATA/PI spec (volume 1, sect 5.14).
541 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, or %ATA_DEV_UNKNOWN
542 * the event of failure.
545 unsigned int ata_dev_classify(const struct ata_taskfile
*tf
)
547 /* Apple's open source Darwin code hints that some devices only
548 * put a proper signature into the LBA mid/high registers,
549 * So, we only check those. It's sufficient for uniqueness.
552 if (((tf
->lbam
== 0) && (tf
->lbah
== 0)) ||
553 ((tf
->lbam
== 0x3c) && (tf
->lbah
== 0xc3))) {
554 DPRINTK("found ATA device by sig\n");
558 if (((tf
->lbam
== 0x14) && (tf
->lbah
== 0xeb)) ||
559 ((tf
->lbam
== 0x69) && (tf
->lbah
== 0x96))) {
560 DPRINTK("found ATAPI device by sig\n");
561 return ATA_DEV_ATAPI
;
564 DPRINTK("unknown device\n");
565 return ATA_DEV_UNKNOWN
;
569 * ata_dev_try_classify - Parse returned ATA device signature
570 * @ap: ATA channel to examine
571 * @device: Device to examine (starting at zero)
572 * @r_err: Value of error register on completion
574 * After an event -- SRST, E.D.D., or SATA COMRESET -- occurs,
575 * an ATA/ATAPI-defined set of values is placed in the ATA
576 * shadow registers, indicating the results of device detection
579 * Select the ATA device, and read the values from the ATA shadow
580 * registers. Then parse according to the Error register value,
581 * and the spec-defined values examined by ata_dev_classify().
587 * Device type - %ATA_DEV_ATA, %ATA_DEV_ATAPI or %ATA_DEV_NONE.
591 ata_dev_try_classify(struct ata_port
*ap
, unsigned int device
, u8
*r_err
)
593 struct ata_taskfile tf
;
597 ap
->ops
->dev_select(ap
, device
);
599 memset(&tf
, 0, sizeof(tf
));
601 ap
->ops
->tf_read(ap
, &tf
);
606 /* see if device passed diags */
609 else if ((device
== 0) && (err
== 0x81))
614 /* determine if device is ATA or ATAPI */
615 class = ata_dev_classify(&tf
);
617 if (class == ATA_DEV_UNKNOWN
)
619 if ((class == ATA_DEV_ATA
) && (ata_chk_status(ap
) == 0))
625 * ata_id_string - Convert IDENTIFY DEVICE page into string
626 * @id: IDENTIFY DEVICE results we will examine
627 * @s: string into which data is output
628 * @ofs: offset into identify device page
629 * @len: length of string to return. must be an even number.
631 * The strings in the IDENTIFY DEVICE page are broken up into
632 * 16-bit chunks. Run through the string, and output each
633 * 8-bit chunk linearly, regardless of platform.
639 void ata_id_string(const u16
*id
, unsigned char *s
,
640 unsigned int ofs
, unsigned int len
)
659 * ata_id_c_string - Convert IDENTIFY DEVICE page into C string
660 * @id: IDENTIFY DEVICE results we will examine
661 * @s: string into which data is output
662 * @ofs: offset into identify device page
663 * @len: length of string to return. must be an odd number.
665 * This function is identical to ata_id_string except that it
666 * trims trailing spaces and terminates the resulting string with
667 * null. @len must be actual maximum length (even number) + 1.
672 void ata_id_c_string(const u16
*id
, unsigned char *s
,
673 unsigned int ofs
, unsigned int len
)
679 ata_id_string(id
, s
, ofs
, len
- 1);
681 p
= s
+ strnlen(s
, len
- 1);
682 while (p
> s
&& p
[-1] == ' ')
687 static u64
ata_id_n_sectors(const u16
*id
)
689 if (ata_id_has_lba(id
)) {
690 if (ata_id_has_lba48(id
))
691 return ata_id_u64(id
, 100);
693 return ata_id_u32(id
, 60);
695 if (ata_id_current_chs_valid(id
))
696 return ata_id_u32(id
, 57);
698 return id
[1] * id
[3] * id
[6];
703 * ata_noop_dev_select - Select device 0/1 on ATA bus
704 * @ap: ATA channel to manipulate
705 * @device: ATA device (numbered from zero) to select
707 * This function performs no actual function.
709 * May be used as the dev_select() entry in ata_port_operations.
714 void ata_noop_dev_select (struct ata_port
*ap
, unsigned int device
)
720 * ata_std_dev_select - Select device 0/1 on ATA bus
721 * @ap: ATA channel to manipulate
722 * @device: ATA device (numbered from zero) to select
724 * Use the method defined in the ATA specification to
725 * make either device 0, or device 1, active on the
726 * ATA channel. Works with both PIO and MMIO.
728 * May be used as the dev_select() entry in ata_port_operations.
734 void ata_std_dev_select (struct ata_port
*ap
, unsigned int device
)
739 tmp
= ATA_DEVICE_OBS
;
741 tmp
= ATA_DEVICE_OBS
| ATA_DEV1
;
743 if (ap
->flags
& ATA_FLAG_MMIO
) {
744 writeb(tmp
, (void __iomem
*) ap
->ioaddr
.device_addr
);
746 outb(tmp
, ap
->ioaddr
.device_addr
);
748 ata_pause(ap
); /* needed; also flushes, for mmio */
752 * ata_dev_select - Select device 0/1 on ATA bus
753 * @ap: ATA channel to manipulate
754 * @device: ATA device (numbered from zero) to select
755 * @wait: non-zero to wait for Status register BSY bit to clear
756 * @can_sleep: non-zero if context allows sleeping
758 * Use the method defined in the ATA specification to
759 * make either device 0, or device 1, active on the
762 * This is a high-level version of ata_std_dev_select(),
763 * which additionally provides the services of inserting
764 * the proper pauses and status polling, where needed.
770 void ata_dev_select(struct ata_port
*ap
, unsigned int device
,
771 unsigned int wait
, unsigned int can_sleep
)
773 VPRINTK("ENTER, ata%u: device %u, wait %u\n",
774 ap
->id
, device
, wait
);
779 ap
->ops
->dev_select(ap
, device
);
782 if (can_sleep
&& ap
->device
[device
].class == ATA_DEV_ATAPI
)
789 * ata_dump_id - IDENTIFY DEVICE info debugging output
790 * @id: IDENTIFY DEVICE page to dump
792 * Dump selected 16-bit words from the given IDENTIFY DEVICE
799 static inline void ata_dump_id(const u16
*id
)
801 DPRINTK("49==0x%04x "
811 DPRINTK("80==0x%04x "
821 DPRINTK("88==0x%04x "
828 * ata_id_xfermask - Compute xfermask from the given IDENTIFY data
829 * @id: IDENTIFY data to compute xfer mask from
831 * Compute the xfermask for this device. This is not as trivial
832 * as it seems if we must consider early devices correctly.
834 * FIXME: pre IDE drive timing (do we care ?).
842 static unsigned int ata_id_xfermask(const u16
*id
)
844 unsigned int pio_mask
, mwdma_mask
, udma_mask
;
846 /* Usual case. Word 53 indicates word 64 is valid */
847 if (id
[ATA_ID_FIELD_VALID
] & (1 << 1)) {
848 pio_mask
= id
[ATA_ID_PIO_MODES
] & 0x03;
852 /* If word 64 isn't valid then Word 51 high byte holds
853 * the PIO timing number for the maximum. Turn it into
856 pio_mask
= (2 << (id
[ATA_ID_OLD_PIO_MODES
] & 0xFF)) - 1 ;
858 /* But wait.. there's more. Design your standards by
859 * committee and you too can get a free iordy field to
860 * process. However its the speeds not the modes that
861 * are supported... Note drivers using the timing API
862 * will get this right anyway
866 mwdma_mask
= id
[ATA_ID_MWDMA_MODES
] & 0x07;
869 if (id
[ATA_ID_FIELD_VALID
] & (1 << 2))
870 udma_mask
= id
[ATA_ID_UDMA_MODES
] & 0xff;
872 return ata_pack_xfermask(pio_mask
, mwdma_mask
, udma_mask
);
876 * ata_port_queue_task - Queue port_task
877 * @ap: The ata_port to queue port_task for
878 * @fn: workqueue function to be scheduled
879 * @data: data value to pass to workqueue function
880 * @delay: delay time for workqueue function
882 * Schedule @fn(@data) for execution after @delay jiffies using
883 * port_task. There is one port_task per port and it's the
884 * user(low level driver)'s responsibility to make sure that only
885 * one task is active at any given time.
887 * libata core layer takes care of synchronization between
888 * port_task and EH. ata_port_queue_task() may be ignored for EH
892 * Inherited from caller.
894 void ata_port_queue_task(struct ata_port
*ap
, void (*fn
)(void *), void *data
,
899 if (ap
->flags
& ATA_FLAG_FLUSH_PORT_TASK
)
902 PREPARE_WORK(&ap
->port_task
, fn
, data
);
905 rc
= queue_work(ata_wq
, &ap
->port_task
);
907 rc
= queue_delayed_work(ata_wq
, &ap
->port_task
, delay
);
909 /* rc == 0 means that another user is using port task */
914 * ata_port_flush_task - Flush port_task
915 * @ap: The ata_port to flush port_task for
917 * After this function completes, port_task is guranteed not to
918 * be running or scheduled.
921 * Kernel thread context (may sleep)
923 void ata_port_flush_task(struct ata_port
*ap
)
929 spin_lock_irqsave(&ap
->host_set
->lock
, flags
);
930 ap
->flags
|= ATA_FLAG_FLUSH_PORT_TASK
;
931 spin_unlock_irqrestore(&ap
->host_set
->lock
, flags
);
933 DPRINTK("flush #1\n");
934 flush_workqueue(ata_wq
);
937 * At this point, if a task is running, it's guaranteed to see
938 * the FLUSH flag; thus, it will never queue pio tasks again.
941 if (!cancel_delayed_work(&ap
->port_task
)) {
942 DPRINTK("flush #2\n");
943 flush_workqueue(ata_wq
);
946 spin_lock_irqsave(&ap
->host_set
->lock
, flags
);
947 ap
->flags
&= ~ATA_FLAG_FLUSH_PORT_TASK
;
948 spin_unlock_irqrestore(&ap
->host_set
->lock
, flags
);
953 void ata_qc_complete_internal(struct ata_queued_cmd
*qc
)
955 struct completion
*waiting
= qc
->private_data
;
961 * ata_exec_internal - execute libata internal command
962 * @dev: Device to which the command is sent
963 * @tf: Taskfile registers for the command and the result
964 * @cdb: CDB for packet command
965 * @dma_dir: Data tranfer direction of the command
966 * @buf: Data buffer of the command
967 * @buflen: Length of data buffer
969 * Executes libata internal command with timeout. @tf contains
970 * command on entry and result on return. Timeout and error
971 * conditions are reported via return value. No recovery action
972 * is taken after a command times out. It's caller's duty to
973 * clean up after timeout.
976 * None. Should be called with kernel context, might sleep.
979 unsigned ata_exec_internal(struct ata_device
*dev
,
980 struct ata_taskfile
*tf
, const u8
*cdb
,
981 int dma_dir
, void *buf
, unsigned int buflen
)
983 struct ata_port
*ap
= dev
->ap
;
984 u8 command
= tf
->command
;
985 struct ata_queued_cmd
*qc
;
986 unsigned int tag
, preempted_tag
;
987 u32 preempted_sactive
, preempted_qc_active
;
988 DECLARE_COMPLETION(wait
);
990 unsigned int err_mask
;
993 spin_lock_irqsave(&ap
->host_set
->lock
, flags
);
995 /* no internal command while frozen */
996 if (ap
->flags
& ATA_FLAG_FROZEN
) {
997 spin_unlock_irqrestore(&ap
->host_set
->lock
, flags
);
998 return AC_ERR_SYSTEM
;
1001 /* initialize internal qc */
1003 /* XXX: Tag 0 is used for drivers with legacy EH as some
1004 * drivers choke if any other tag is given. This breaks
1005 * ata_tag_internal() test for those drivers. Don't use new
1006 * EH stuff without converting to it.
1008 if (ap
->ops
->error_handler
)
1009 tag
= ATA_TAG_INTERNAL
;
1013 if (test_and_set_bit(tag
, &ap
->qc_allocated
))
1015 qc
= __ata_qc_from_tag(ap
, tag
);
1023 preempted_tag
= ap
->active_tag
;
1024 preempted_sactive
= ap
->sactive
;
1025 preempted_qc_active
= ap
->qc_active
;
1026 ap
->active_tag
= ATA_TAG_POISON
;
1030 /* prepare & issue qc */
1033 memcpy(qc
->cdb
, cdb
, ATAPI_CDB_LEN
);
1034 qc
->flags
|= ATA_QCFLAG_RESULT_TF
;
1035 qc
->dma_dir
= dma_dir
;
1036 if (dma_dir
!= DMA_NONE
) {
1037 ata_sg_init_one(qc
, buf
, buflen
);
1038 qc
->nsect
= buflen
/ ATA_SECT_SIZE
;
1041 qc
->private_data
= &wait
;
1042 qc
->complete_fn
= ata_qc_complete_internal
;
1046 spin_unlock_irqrestore(&ap
->host_set
->lock
, flags
);
1048 rc
= wait_for_completion_timeout(&wait
, ATA_TMOUT_INTERNAL
);
1050 ata_port_flush_task(ap
);
1053 spin_lock_irqsave(&ap
->host_set
->lock
, flags
);
1055 /* We're racing with irq here. If we lose, the
1056 * following test prevents us from completing the qc
1057 * twice. If we win, the port is frozen and will be
1058 * cleaned up by ->post_internal_cmd().
1060 if (qc
->flags
& ATA_QCFLAG_ACTIVE
) {
1061 qc
->err_mask
|= AC_ERR_TIMEOUT
;
1063 if (ap
->ops
->error_handler
)
1064 ata_port_freeze(ap
);
1066 ata_qc_complete(qc
);
1068 ata_dev_printk(dev
, KERN_WARNING
,
1069 "qc timeout (cmd 0x%x)\n", command
);
1072 spin_unlock_irqrestore(&ap
->host_set
->lock
, flags
);
1075 /* do post_internal_cmd */
1076 if (ap
->ops
->post_internal_cmd
)
1077 ap
->ops
->post_internal_cmd(qc
);
1079 if (qc
->flags
& ATA_QCFLAG_FAILED
&& !qc
->err_mask
) {
1080 ata_dev_printk(dev
, KERN_WARNING
, "zero err_mask for failed "
1081 "internal command, assuming AC_ERR_OTHER\n");
1082 qc
->err_mask
|= AC_ERR_OTHER
;
1086 spin_lock_irqsave(&ap
->host_set
->lock
, flags
);
1088 *tf
= qc
->result_tf
;
1089 err_mask
= qc
->err_mask
;
1092 ap
->active_tag
= preempted_tag
;
1093 ap
->sactive
= preempted_sactive
;
1094 ap
->qc_active
= preempted_qc_active
;
1096 /* XXX - Some LLDDs (sata_mv) disable port on command failure.
1097 * Until those drivers are fixed, we detect the condition
1098 * here, fail the command with AC_ERR_SYSTEM and reenable the
1101 * Note that this doesn't change any behavior as internal
1102 * command failure results in disabling the device in the
1103 * higher layer for LLDDs without new reset/EH callbacks.
1105 * Kill the following code as soon as those drivers are fixed.
1107 if (ap
->flags
& ATA_FLAG_DISABLED
) {
1108 err_mask
|= AC_ERR_SYSTEM
;
1112 spin_unlock_irqrestore(&ap
->host_set
->lock
, flags
);
1118 * ata_pio_need_iordy - check if iordy needed
1121 * Check if the current speed of the device requires IORDY. Used
1122 * by various controllers for chip configuration.
1125 unsigned int ata_pio_need_iordy(const struct ata_device
*adev
)
1128 int speed
= adev
->pio_mode
- XFER_PIO_0
;
1135 /* If we have no drive specific rule, then PIO 2 is non IORDY */
1137 if (adev
->id
[ATA_ID_FIELD_VALID
] & 2) { /* EIDE */
1138 pio
= adev
->id
[ATA_ID_EIDE_PIO
];
1139 /* Is the speed faster than the drive allows non IORDY ? */
1141 /* This is cycle times not frequency - watch the logic! */
1142 if (pio
> 240) /* PIO2 is 240nS per cycle */
1151 * ata_dev_read_id - Read ID data from the specified device
1152 * @dev: target device
1153 * @p_class: pointer to class of the target device (may be changed)
1154 * @post_reset: is this read ID post-reset?
1155 * @id: buffer to read IDENTIFY data into
1157 * Read ID data from the specified device. ATA_CMD_ID_ATA is
1158 * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
1159 * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS
1160 * for pre-ATA4 drives.
1163 * Kernel thread context (may sleep)
1166 * 0 on success, -errno otherwise.
1168 static int ata_dev_read_id(struct ata_device
*dev
, unsigned int *p_class
,
1169 int post_reset
, u16
*id
)
1171 struct ata_port
*ap
= dev
->ap
;
1172 unsigned int class = *p_class
;
1173 struct ata_taskfile tf
;
1174 unsigned int err_mask
= 0;
1178 DPRINTK("ENTER, host %u, dev %u\n", ap
->id
, dev
->devno
);
1180 ata_dev_select(ap
, dev
->devno
, 1, 1); /* select device 0/1 */
1183 ata_tf_init(dev
, &tf
);
1187 tf
.command
= ATA_CMD_ID_ATA
;
1190 tf
.command
= ATA_CMD_ID_ATAPI
;
1194 reason
= "unsupported class";
1198 tf
.protocol
= ATA_PROT_PIO
;
1200 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_FROM_DEVICE
,
1201 id
, sizeof(id
[0]) * ATA_ID_WORDS
);
1204 reason
= "I/O error";
1208 swap_buf_le16(id
, ATA_ID_WORDS
);
1211 if ((class == ATA_DEV_ATA
) != (ata_id_is_ata(id
) | ata_id_is_cfa(id
))) {
1213 reason
= "device reports illegal type";
1217 if (post_reset
&& class == ATA_DEV_ATA
) {
1219 * The exact sequence expected by certain pre-ATA4 drives is:
1222 * INITIALIZE DEVICE PARAMETERS
1224 * Some drives were very specific about that exact sequence.
1226 if (ata_id_major_version(id
) < 4 || !ata_id_has_lba(id
)) {
1227 err_mask
= ata_dev_init_params(dev
, id
[3], id
[6]);
1230 reason
= "INIT_DEV_PARAMS failed";
1234 /* current CHS translation info (id[53-58]) might be
1235 * changed. reread the identify device info.
1247 ata_dev_printk(dev
, KERN_WARNING
, "failed to IDENTIFY "
1248 "(%s, err_mask=0x%x)\n", reason
, err_mask
);
1252 static inline u8
ata_dev_knobble(struct ata_device
*dev
)
1254 return ((dev
->ap
->cbl
== ATA_CBL_SATA
) && (!ata_id_is_sata(dev
->id
)));
1257 static void ata_dev_config_ncq(struct ata_device
*dev
,
1258 char *desc
, size_t desc_sz
)
1260 struct ata_port
*ap
= dev
->ap
;
1261 int hdepth
= 0, ddepth
= ata_id_queue_depth(dev
->id
);
1263 if (!ata_id_has_ncq(dev
->id
)) {
1268 if (ap
->flags
& ATA_FLAG_NCQ
) {
1269 hdepth
= min(ap
->host
->can_queue
, ATA_MAX_QUEUE
- 1);
1270 dev
->flags
|= ATA_DFLAG_NCQ
;
1273 if (hdepth
>= ddepth
)
1274 snprintf(desc
, desc_sz
, "NCQ (depth %d)", ddepth
);
1276 snprintf(desc
, desc_sz
, "NCQ (depth %d/%d)", hdepth
, ddepth
);
1280 * ata_dev_configure - Configure the specified ATA/ATAPI device
1281 * @dev: Target device to configure
1282 * @print_info: Enable device info printout
1284 * Configure @dev according to @dev->id. Generic and low-level
1285 * driver specific fixups are also applied.
1288 * Kernel thread context (may sleep)
1291 * 0 on success, -errno otherwise
1293 static int ata_dev_configure(struct ata_device
*dev
, int print_info
)
1295 struct ata_port
*ap
= dev
->ap
;
1296 const u16
*id
= dev
->id
;
1297 unsigned int xfer_mask
;
1300 if (!ata_dev_enabled(dev
)) {
1301 DPRINTK("ENTER/EXIT (host %u, dev %u) -- nodev\n",
1302 ap
->id
, dev
->devno
);
1306 DPRINTK("ENTER, host %u, dev %u\n", ap
->id
, dev
->devno
);
1308 /* print device capabilities */
1310 ata_dev_printk(dev
, KERN_DEBUG
, "cfg 49:%04x 82:%04x 83:%04x "
1311 "84:%04x 85:%04x 86:%04x 87:%04x 88:%04x\n",
1312 id
[49], id
[82], id
[83], id
[84],
1313 id
[85], id
[86], id
[87], id
[88]);
1315 /* initialize to-be-configured parameters */
1316 dev
->flags
&= ~ATA_DFLAG_CFG_MASK
;
1317 dev
->max_sectors
= 0;
1325 * common ATA, ATAPI feature tests
1328 /* find max transfer mode; for printk only */
1329 xfer_mask
= ata_id_xfermask(id
);
1333 /* ATA-specific feature tests */
1334 if (dev
->class == ATA_DEV_ATA
) {
1335 dev
->n_sectors
= ata_id_n_sectors(id
);
1337 if (ata_id_has_lba(id
)) {
1338 const char *lba_desc
;
1342 dev
->flags
|= ATA_DFLAG_LBA
;
1343 if (ata_id_has_lba48(id
)) {
1344 dev
->flags
|= ATA_DFLAG_LBA48
;
1349 ata_dev_config_ncq(dev
, ncq_desc
, sizeof(ncq_desc
));
1351 /* print device info to dmesg */
1353 ata_dev_printk(dev
, KERN_INFO
, "ATA-%d, "
1354 "max %s, %Lu sectors: %s %s\n",
1355 ata_id_major_version(id
),
1356 ata_mode_string(xfer_mask
),
1357 (unsigned long long)dev
->n_sectors
,
1358 lba_desc
, ncq_desc
);
1362 /* Default translation */
1363 dev
->cylinders
= id
[1];
1365 dev
->sectors
= id
[6];
1367 if (ata_id_current_chs_valid(id
)) {
1368 /* Current CHS translation is valid. */
1369 dev
->cylinders
= id
[54];
1370 dev
->heads
= id
[55];
1371 dev
->sectors
= id
[56];
1374 /* print device info to dmesg */
1376 ata_dev_printk(dev
, KERN_INFO
, "ATA-%d, "
1377 "max %s, %Lu sectors: CHS %u/%u/%u\n",
1378 ata_id_major_version(id
),
1379 ata_mode_string(xfer_mask
),
1380 (unsigned long long)dev
->n_sectors
,
1381 dev
->cylinders
, dev
->heads
, dev
->sectors
);
1384 if (dev
->id
[59] & 0x100) {
1385 dev
->multi_count
= dev
->id
[59] & 0xff;
1386 DPRINTK("ata%u: dev %u multi count %u\n",
1387 ap
->id
, dev
->devno
, dev
->multi_count
);
1393 /* ATAPI-specific feature tests */
1394 else if (dev
->class == ATA_DEV_ATAPI
) {
1395 char *cdb_intr_string
= "";
1397 rc
= atapi_cdb_len(id
);
1398 if ((rc
< 12) || (rc
> ATAPI_CDB_LEN
)) {
1399 ata_dev_printk(dev
, KERN_WARNING
,
1400 "unsupported CDB len\n");
1404 dev
->cdb_len
= (unsigned int) rc
;
1406 if (ata_id_cdb_intr(dev
->id
)) {
1407 dev
->flags
|= ATA_DFLAG_CDB_INTR
;
1408 cdb_intr_string
= ", CDB intr";
1411 /* print device info to dmesg */
1413 ata_dev_printk(dev
, KERN_INFO
, "ATAPI, max %s%s\n",
1414 ata_mode_string(xfer_mask
),
1418 ap
->host
->max_cmd_len
= 0;
1419 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
1420 ap
->host
->max_cmd_len
= max_t(unsigned int,
1421 ap
->host
->max_cmd_len
,
1422 ap
->device
[i
].cdb_len
);
1424 /* limit bridge transfers to udma5, 200 sectors */
1425 if (ata_dev_knobble(dev
)) {
1427 ata_dev_printk(dev
, KERN_INFO
,
1428 "applying bridge limits\n");
1429 dev
->udma_mask
&= ATA_UDMA5
;
1430 dev
->max_sectors
= ATA_MAX_SECTORS
;
1433 if (ap
->ops
->dev_config
)
1434 ap
->ops
->dev_config(ap
, dev
);
1436 DPRINTK("EXIT, drv_stat = 0x%x\n", ata_chk_status(ap
));
1440 DPRINTK("EXIT, err\n");
1445 * ata_bus_probe - Reset and probe ATA bus
1448 * Master ATA bus probing function. Initiates a hardware-dependent
1449 * bus reset, then attempts to identify any devices found on
1453 * PCI/etc. bus probe sem.
1456 * Zero on success, negative errno otherwise.
1459 static int ata_bus_probe(struct ata_port
*ap
)
1461 unsigned int classes
[ATA_MAX_DEVICES
];
1462 int tries
[ATA_MAX_DEVICES
];
1463 int i
, rc
, down_xfermask
;
1464 struct ata_device
*dev
;
1468 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
1469 tries
[i
] = ATA_PROBE_MAX_TRIES
;
1474 /* reset and determine device classes */
1475 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
1476 classes
[i
] = ATA_DEV_UNKNOWN
;
1478 if (ap
->ops
->probe_reset
) {
1479 rc
= ap
->ops
->probe_reset(ap
, classes
);
1481 ata_port_printk(ap
, KERN_ERR
,
1482 "reset failed (errno=%d)\n", rc
);
1486 ap
->ops
->phy_reset(ap
);
1488 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
1489 if (!(ap
->flags
& ATA_FLAG_DISABLED
))
1490 classes
[i
] = ap
->device
[i
].class;
1491 ap
->device
[i
].class = ATA_DEV_UNKNOWN
;
1497 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
1498 if (classes
[i
] == ATA_DEV_UNKNOWN
)
1499 classes
[i
] = ATA_DEV_NONE
;
1501 /* read IDENTIFY page and configure devices */
1502 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
1503 dev
= &ap
->device
[i
];
1506 dev
->class = classes
[i
];
1508 if (!ata_dev_enabled(dev
))
1511 rc
= ata_dev_read_id(dev
, &dev
->class, 1, dev
->id
);
1515 rc
= ata_dev_configure(dev
, 1);
1520 /* configure transfer mode */
1521 rc
= ata_set_mode(ap
, &dev
);
1527 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
1528 if (ata_dev_enabled(&ap
->device
[i
]))
1531 /* no device present, disable port */
1532 ata_port_disable(ap
);
1533 ap
->ops
->port_disable(ap
);
1540 tries
[dev
->devno
] = 0;
1543 sata_down_spd_limit(ap
);
1546 tries
[dev
->devno
]--;
1547 if (down_xfermask
&&
1548 ata_down_xfermask_limit(dev
, tries
[dev
->devno
] == 1))
1549 tries
[dev
->devno
] = 0;
1552 if (!tries
[dev
->devno
]) {
1553 ata_down_xfermask_limit(dev
, 1);
1554 ata_dev_disable(dev
);
1561 * ata_port_probe - Mark port as enabled
1562 * @ap: Port for which we indicate enablement
1564 * Modify @ap data structure such that the system
1565 * thinks that the entire port is enabled.
1567 * LOCKING: host_set lock, or some other form of
1571 void ata_port_probe(struct ata_port
*ap
)
1573 ap
->flags
&= ~ATA_FLAG_DISABLED
;
1577 * sata_print_link_status - Print SATA link status
1578 * @ap: SATA port to printk link status about
1580 * This function prints link speed and status of a SATA link.
1585 static void sata_print_link_status(struct ata_port
*ap
)
1587 u32 sstatus
, scontrol
, tmp
;
1589 if (sata_scr_read(ap
, SCR_STATUS
, &sstatus
))
1591 sata_scr_read(ap
, SCR_CONTROL
, &scontrol
);
1593 if (ata_port_online(ap
)) {
1594 tmp
= (sstatus
>> 4) & 0xf;
1595 ata_port_printk(ap
, KERN_INFO
,
1596 "SATA link up %s (SStatus %X SControl %X)\n",
1597 sata_spd_string(tmp
), sstatus
, scontrol
);
1599 ata_port_printk(ap
, KERN_INFO
,
1600 "SATA link down (SStatus %X SControl %X)\n",
1606 * __sata_phy_reset - Wake/reset a low-level SATA PHY
1607 * @ap: SATA port associated with target SATA PHY.
1609 * This function issues commands to standard SATA Sxxx
1610 * PHY registers, to wake up the phy (and device), and
1611 * clear any reset condition.
1614 * PCI/etc. bus probe sem.
1617 void __sata_phy_reset(struct ata_port
*ap
)
1620 unsigned long timeout
= jiffies
+ (HZ
* 5);
1622 if (ap
->flags
& ATA_FLAG_SATA_RESET
) {
1623 /* issue phy wake/reset */
1624 sata_scr_write_flush(ap
, SCR_CONTROL
, 0x301);
1625 /* Couldn't find anything in SATA I/II specs, but
1626 * AHCI-1.1 10.4.2 says at least 1 ms. */
1629 /* phy wake/clear reset */
1630 sata_scr_write_flush(ap
, SCR_CONTROL
, 0x300);
1632 /* wait for phy to become ready, if necessary */
1635 sata_scr_read(ap
, SCR_STATUS
, &sstatus
);
1636 if ((sstatus
& 0xf) != 1)
1638 } while (time_before(jiffies
, timeout
));
1640 /* print link status */
1641 sata_print_link_status(ap
);
1643 /* TODO: phy layer with polling, timeouts, etc. */
1644 if (!ata_port_offline(ap
))
1647 ata_port_disable(ap
);
1649 if (ap
->flags
& ATA_FLAG_DISABLED
)
1652 if (ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
)) {
1653 ata_port_disable(ap
);
1657 ap
->cbl
= ATA_CBL_SATA
;
1661 * sata_phy_reset - Reset SATA bus.
1662 * @ap: SATA port associated with target SATA PHY.
1664 * This function resets the SATA bus, and then probes
1665 * the bus for devices.
1668 * PCI/etc. bus probe sem.
1671 void sata_phy_reset(struct ata_port
*ap
)
1673 __sata_phy_reset(ap
);
1674 if (ap
->flags
& ATA_FLAG_DISABLED
)
1680 * ata_dev_pair - return other device on cable
1683 * Obtain the other device on the same cable, or if none is
1684 * present NULL is returned
1687 struct ata_device
*ata_dev_pair(struct ata_device
*adev
)
1689 struct ata_port
*ap
= adev
->ap
;
1690 struct ata_device
*pair
= &ap
->device
[1 - adev
->devno
];
1691 if (!ata_dev_enabled(pair
))
1697 * ata_port_disable - Disable port.
1698 * @ap: Port to be disabled.
1700 * Modify @ap data structure such that the system
1701 * thinks that the entire port is disabled, and should
1702 * never attempt to probe or communicate with devices
1705 * LOCKING: host_set lock, or some other form of
1709 void ata_port_disable(struct ata_port
*ap
)
1711 ap
->device
[0].class = ATA_DEV_NONE
;
1712 ap
->device
[1].class = ATA_DEV_NONE
;
1713 ap
->flags
|= ATA_FLAG_DISABLED
;
1717 * sata_down_spd_limit - adjust SATA spd limit downward
1718 * @ap: Port to adjust SATA spd limit for
1720 * Adjust SATA spd limit of @ap downward. Note that this
1721 * function only adjusts the limit. The change must be applied
1722 * using sata_set_spd().
1725 * Inherited from caller.
1728 * 0 on success, negative errno on failure
1730 int sata_down_spd_limit(struct ata_port
*ap
)
1732 u32 sstatus
, spd
, mask
;
1735 rc
= sata_scr_read(ap
, SCR_STATUS
, &sstatus
);
1739 mask
= ap
->sata_spd_limit
;
1742 highbit
= fls(mask
) - 1;
1743 mask
&= ~(1 << highbit
);
1745 spd
= (sstatus
>> 4) & 0xf;
1749 mask
&= (1 << spd
) - 1;
1753 ap
->sata_spd_limit
= mask
;
1755 ata_port_printk(ap
, KERN_WARNING
, "limiting SATA link speed to %s\n",
1756 sata_spd_string(fls(mask
)));
1761 static int __sata_set_spd_needed(struct ata_port
*ap
, u32
*scontrol
)
1765 if (ap
->sata_spd_limit
== UINT_MAX
)
1768 limit
= fls(ap
->sata_spd_limit
);
1770 spd
= (*scontrol
>> 4) & 0xf;
1771 *scontrol
= (*scontrol
& ~0xf0) | ((limit
& 0xf) << 4);
1773 return spd
!= limit
;
1777 * sata_set_spd_needed - is SATA spd configuration needed
1778 * @ap: Port in question
1780 * Test whether the spd limit in SControl matches
1781 * @ap->sata_spd_limit. This function is used to determine
1782 * whether hardreset is necessary to apply SATA spd
1786 * Inherited from caller.
1789 * 1 if SATA spd configuration is needed, 0 otherwise.
1791 int sata_set_spd_needed(struct ata_port
*ap
)
1795 if (sata_scr_read(ap
, SCR_CONTROL
, &scontrol
))
1798 return __sata_set_spd_needed(ap
, &scontrol
);
1802 * sata_set_spd - set SATA spd according to spd limit
1803 * @ap: Port to set SATA spd for
1805 * Set SATA spd of @ap according to sata_spd_limit.
1808 * Inherited from caller.
1811 * 0 if spd doesn't need to be changed, 1 if spd has been
1812 * changed. Negative errno if SCR registers are inaccessible.
1814 int sata_set_spd(struct ata_port
*ap
)
1819 if ((rc
= sata_scr_read(ap
, SCR_CONTROL
, &scontrol
)))
1822 if (!__sata_set_spd_needed(ap
, &scontrol
))
1825 if ((rc
= sata_scr_write(ap
, SCR_CONTROL
, scontrol
)))
1832 * This mode timing computation functionality is ported over from
1833 * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik
1836 * PIO 0-5, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
1837 * These were taken from ATA/ATAPI-6 standard, rev 0a, except
1838 * for PIO 5, which is a nonstandard extension and UDMA6, which
1839 * is currently supported only by Maxtor drives.
1842 static const struct ata_timing ata_timing
[] = {
1844 { XFER_UDMA_6
, 0, 0, 0, 0, 0, 0, 0, 15 },
1845 { XFER_UDMA_5
, 0, 0, 0, 0, 0, 0, 0, 20 },
1846 { XFER_UDMA_4
, 0, 0, 0, 0, 0, 0, 0, 30 },
1847 { XFER_UDMA_3
, 0, 0, 0, 0, 0, 0, 0, 45 },
1849 { XFER_UDMA_2
, 0, 0, 0, 0, 0, 0, 0, 60 },
1850 { XFER_UDMA_1
, 0, 0, 0, 0, 0, 0, 0, 80 },
1851 { XFER_UDMA_0
, 0, 0, 0, 0, 0, 0, 0, 120 },
1853 /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */
1855 { XFER_MW_DMA_2
, 25, 0, 0, 0, 70, 25, 120, 0 },
1856 { XFER_MW_DMA_1
, 45, 0, 0, 0, 80, 50, 150, 0 },
1857 { XFER_MW_DMA_0
, 60, 0, 0, 0, 215, 215, 480, 0 },
1859 { XFER_SW_DMA_2
, 60, 0, 0, 0, 120, 120, 240, 0 },
1860 { XFER_SW_DMA_1
, 90, 0, 0, 0, 240, 240, 480, 0 },
1861 { XFER_SW_DMA_0
, 120, 0, 0, 0, 480, 480, 960, 0 },
1863 /* { XFER_PIO_5, 20, 50, 30, 100, 50, 30, 100, 0 }, */
1864 { XFER_PIO_4
, 25, 70, 25, 120, 70, 25, 120, 0 },
1865 { XFER_PIO_3
, 30, 80, 70, 180, 80, 70, 180, 0 },
1867 { XFER_PIO_2
, 30, 290, 40, 330, 100, 90, 240, 0 },
1868 { XFER_PIO_1
, 50, 290, 93, 383, 125, 100, 383, 0 },
1869 { XFER_PIO_0
, 70, 290, 240, 600, 165, 150, 600, 0 },
1871 /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */
1876 #define ENOUGH(v,unit) (((v)-1)/(unit)+1)
1877 #define EZ(v,unit) ((v)?ENOUGH(v,unit):0)
1879 static void ata_timing_quantize(const struct ata_timing
*t
, struct ata_timing
*q
, int T
, int UT
)
1881 q
->setup
= EZ(t
->setup
* 1000, T
);
1882 q
->act8b
= EZ(t
->act8b
* 1000, T
);
1883 q
->rec8b
= EZ(t
->rec8b
* 1000, T
);
1884 q
->cyc8b
= EZ(t
->cyc8b
* 1000, T
);
1885 q
->active
= EZ(t
->active
* 1000, T
);
1886 q
->recover
= EZ(t
->recover
* 1000, T
);
1887 q
->cycle
= EZ(t
->cycle
* 1000, T
);
1888 q
->udma
= EZ(t
->udma
* 1000, UT
);
1891 void ata_timing_merge(const struct ata_timing
*a
, const struct ata_timing
*b
,
1892 struct ata_timing
*m
, unsigned int what
)
1894 if (what
& ATA_TIMING_SETUP
) m
->setup
= max(a
->setup
, b
->setup
);
1895 if (what
& ATA_TIMING_ACT8B
) m
->act8b
= max(a
->act8b
, b
->act8b
);
1896 if (what
& ATA_TIMING_REC8B
) m
->rec8b
= max(a
->rec8b
, b
->rec8b
);
1897 if (what
& ATA_TIMING_CYC8B
) m
->cyc8b
= max(a
->cyc8b
, b
->cyc8b
);
1898 if (what
& ATA_TIMING_ACTIVE
) m
->active
= max(a
->active
, b
->active
);
1899 if (what
& ATA_TIMING_RECOVER
) m
->recover
= max(a
->recover
, b
->recover
);
1900 if (what
& ATA_TIMING_CYCLE
) m
->cycle
= max(a
->cycle
, b
->cycle
);
1901 if (what
& ATA_TIMING_UDMA
) m
->udma
= max(a
->udma
, b
->udma
);
1904 static const struct ata_timing
* ata_timing_find_mode(unsigned short speed
)
1906 const struct ata_timing
*t
;
1908 for (t
= ata_timing
; t
->mode
!= speed
; t
++)
1909 if (t
->mode
== 0xFF)
1914 int ata_timing_compute(struct ata_device
*adev
, unsigned short speed
,
1915 struct ata_timing
*t
, int T
, int UT
)
1917 const struct ata_timing
*s
;
1918 struct ata_timing p
;
1924 if (!(s
= ata_timing_find_mode(speed
)))
1927 memcpy(t
, s
, sizeof(*s
));
1930 * If the drive is an EIDE drive, it can tell us it needs extended
1931 * PIO/MW_DMA cycle timing.
1934 if (adev
->id
[ATA_ID_FIELD_VALID
] & 2) { /* EIDE drive */
1935 memset(&p
, 0, sizeof(p
));
1936 if(speed
>= XFER_PIO_0
&& speed
<= XFER_SW_DMA_0
) {
1937 if (speed
<= XFER_PIO_2
) p
.cycle
= p
.cyc8b
= adev
->id
[ATA_ID_EIDE_PIO
];
1938 else p
.cycle
= p
.cyc8b
= adev
->id
[ATA_ID_EIDE_PIO_IORDY
];
1939 } else if(speed
>= XFER_MW_DMA_0
&& speed
<= XFER_MW_DMA_2
) {
1940 p
.cycle
= adev
->id
[ATA_ID_EIDE_DMA_MIN
];
1942 ata_timing_merge(&p
, t
, t
, ATA_TIMING_CYCLE
| ATA_TIMING_CYC8B
);
1946 * Convert the timing to bus clock counts.
1949 ata_timing_quantize(t
, t
, T
, UT
);
1952 * Even in DMA/UDMA modes we still use PIO access for IDENTIFY,
1953 * S.M.A.R.T * and some other commands. We have to ensure that the
1954 * DMA cycle timing is slower/equal than the fastest PIO timing.
1957 if (speed
> XFER_PIO_4
) {
1958 ata_timing_compute(adev
, adev
->pio_mode
, &p
, T
, UT
);
1959 ata_timing_merge(&p
, t
, t
, ATA_TIMING_ALL
);
1963 * Lengthen active & recovery time so that cycle time is correct.
1966 if (t
->act8b
+ t
->rec8b
< t
->cyc8b
) {
1967 t
->act8b
+= (t
->cyc8b
- (t
->act8b
+ t
->rec8b
)) / 2;
1968 t
->rec8b
= t
->cyc8b
- t
->act8b
;
1971 if (t
->active
+ t
->recover
< t
->cycle
) {
1972 t
->active
+= (t
->cycle
- (t
->active
+ t
->recover
)) / 2;
1973 t
->recover
= t
->cycle
- t
->active
;
1980 * ata_down_xfermask_limit - adjust dev xfer masks downward
1981 * @dev: Device to adjust xfer masks
1982 * @force_pio0: Force PIO0
1984 * Adjust xfer masks of @dev downward. Note that this function
1985 * does not apply the change. Invoking ata_set_mode() afterwards
1986 * will apply the limit.
1989 * Inherited from caller.
1992 * 0 on success, negative errno on failure
1994 int ata_down_xfermask_limit(struct ata_device
*dev
, int force_pio0
)
1996 unsigned long xfer_mask
;
1999 xfer_mask
= ata_pack_xfermask(dev
->pio_mask
, dev
->mwdma_mask
,
2004 /* don't gear down to MWDMA from UDMA, go directly to PIO */
2005 if (xfer_mask
& ATA_MASK_UDMA
)
2006 xfer_mask
&= ~ATA_MASK_MWDMA
;
2008 highbit
= fls(xfer_mask
) - 1;
2009 xfer_mask
&= ~(1 << highbit
);
2011 xfer_mask
&= 1 << ATA_SHIFT_PIO
;
2015 ata_unpack_xfermask(xfer_mask
, &dev
->pio_mask
, &dev
->mwdma_mask
,
2018 ata_dev_printk(dev
, KERN_WARNING
, "limiting speed to %s\n",
2019 ata_mode_string(xfer_mask
));
2027 static int ata_dev_set_mode(struct ata_device
*dev
)
2029 unsigned int err_mask
;
2032 dev
->flags
&= ~ATA_DFLAG_PIO
;
2033 if (dev
->xfer_shift
== ATA_SHIFT_PIO
)
2034 dev
->flags
|= ATA_DFLAG_PIO
;
2036 err_mask
= ata_dev_set_xfermode(dev
);
2038 ata_dev_printk(dev
, KERN_ERR
, "failed to set xfermode "
2039 "(err_mask=0x%x)\n", err_mask
);
2043 rc
= ata_dev_revalidate(dev
, 0);
2047 DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
2048 dev
->xfer_shift
, (int)dev
->xfer_mode
);
2050 ata_dev_printk(dev
, KERN_INFO
, "configured for %s\n",
2051 ata_mode_string(ata_xfer_mode2mask(dev
->xfer_mode
)));
2056 * ata_set_mode - Program timings and issue SET FEATURES - XFER
2057 * @ap: port on which timings will be programmed
2058 * @r_failed_dev: out paramter for failed device
2060 * Set ATA device disk transfer mode (PIO3, UDMA6, etc.). If
2061 * ata_set_mode() fails, pointer to the failing device is
2062 * returned in @r_failed_dev.
2065 * PCI/etc. bus probe sem.
2068 * 0 on success, negative errno otherwise
2070 int ata_set_mode(struct ata_port
*ap
, struct ata_device
**r_failed_dev
)
2072 struct ata_device
*dev
;
2073 int i
, rc
= 0, used_dma
= 0, found
= 0;
2075 /* has private set_mode? */
2076 if (ap
->ops
->set_mode
) {
2077 /* FIXME: make ->set_mode handle no device case and
2078 * return error code and failing device on failure.
2080 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
2081 if (ata_dev_enabled(&ap
->device
[i
])) {
2082 ap
->ops
->set_mode(ap
);
2089 /* step 1: calculate xfer_mask */
2090 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
2091 unsigned int pio_mask
, dma_mask
;
2093 dev
= &ap
->device
[i
];
2095 if (!ata_dev_enabled(dev
))
2098 ata_dev_xfermask(dev
);
2100 pio_mask
= ata_pack_xfermask(dev
->pio_mask
, 0, 0);
2101 dma_mask
= ata_pack_xfermask(0, dev
->mwdma_mask
, dev
->udma_mask
);
2102 dev
->pio_mode
= ata_xfer_mask2mode(pio_mask
);
2103 dev
->dma_mode
= ata_xfer_mask2mode(dma_mask
);
2112 /* step 2: always set host PIO timings */
2113 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
2114 dev
= &ap
->device
[i
];
2115 if (!ata_dev_enabled(dev
))
2118 if (!dev
->pio_mode
) {
2119 ata_dev_printk(dev
, KERN_WARNING
, "no PIO support\n");
2124 dev
->xfer_mode
= dev
->pio_mode
;
2125 dev
->xfer_shift
= ATA_SHIFT_PIO
;
2126 if (ap
->ops
->set_piomode
)
2127 ap
->ops
->set_piomode(ap
, dev
);
2130 /* step 3: set host DMA timings */
2131 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
2132 dev
= &ap
->device
[i
];
2134 if (!ata_dev_enabled(dev
) || !dev
->dma_mode
)
2137 dev
->xfer_mode
= dev
->dma_mode
;
2138 dev
->xfer_shift
= ata_xfer_mode2shift(dev
->dma_mode
);
2139 if (ap
->ops
->set_dmamode
)
2140 ap
->ops
->set_dmamode(ap
, dev
);
2143 /* step 4: update devices' xfer mode */
2144 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
2145 dev
= &ap
->device
[i
];
2147 if (!ata_dev_enabled(dev
))
2150 rc
= ata_dev_set_mode(dev
);
2155 /* Record simplex status. If we selected DMA then the other
2156 * host channels are not permitted to do so.
2158 if (used_dma
&& (ap
->host_set
->flags
& ATA_HOST_SIMPLEX
))
2159 ap
->host_set
->simplex_claimed
= 1;
2161 /* step5: chip specific finalisation */
2162 if (ap
->ops
->post_set_mode
)
2163 ap
->ops
->post_set_mode(ap
);
2167 *r_failed_dev
= dev
;
2172 * ata_tf_to_host - issue ATA taskfile to host controller
2173 * @ap: port to which command is being issued
2174 * @tf: ATA taskfile register set
2176 * Issues ATA taskfile register set to ATA host controller,
2177 * with proper synchronization with interrupt handler and
2181 * spin_lock_irqsave(host_set lock)
2184 static inline void ata_tf_to_host(struct ata_port
*ap
,
2185 const struct ata_taskfile
*tf
)
2187 ap
->ops
->tf_load(ap
, tf
);
2188 ap
->ops
->exec_command(ap
, tf
);
2192 * ata_busy_sleep - sleep until BSY clears, or timeout
2193 * @ap: port containing status register to be polled
2194 * @tmout_pat: impatience timeout
2195 * @tmout: overall timeout
2197 * Sleep until ATA Status register bit BSY clears,
2198 * or a timeout occurs.
2203 unsigned int ata_busy_sleep (struct ata_port
*ap
,
2204 unsigned long tmout_pat
, unsigned long tmout
)
2206 unsigned long timer_start
, timeout
;
2209 status
= ata_busy_wait(ap
, ATA_BUSY
, 300);
2210 timer_start
= jiffies
;
2211 timeout
= timer_start
+ tmout_pat
;
2212 while ((status
& ATA_BUSY
) && (time_before(jiffies
, timeout
))) {
2214 status
= ata_busy_wait(ap
, ATA_BUSY
, 3);
2217 if (status
& ATA_BUSY
)
2218 ata_port_printk(ap
, KERN_WARNING
,
2219 "port is slow to respond, please be patient\n");
2221 timeout
= timer_start
+ tmout
;
2222 while ((status
& ATA_BUSY
) && (time_before(jiffies
, timeout
))) {
2224 status
= ata_chk_status(ap
);
2227 if (status
& ATA_BUSY
) {
2228 ata_port_printk(ap
, KERN_ERR
, "port failed to respond "
2229 "(%lu secs)\n", tmout
/ HZ
);
2236 static void ata_bus_post_reset(struct ata_port
*ap
, unsigned int devmask
)
2238 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
2239 unsigned int dev0
= devmask
& (1 << 0);
2240 unsigned int dev1
= devmask
& (1 << 1);
2241 unsigned long timeout
;
2243 /* if device 0 was found in ata_devchk, wait for its
2247 ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
);
2249 /* if device 1 was found in ata_devchk, wait for
2250 * register access, then wait for BSY to clear
2252 timeout
= jiffies
+ ATA_TMOUT_BOOT
;
2256 ap
->ops
->dev_select(ap
, 1);
2257 if (ap
->flags
& ATA_FLAG_MMIO
) {
2258 nsect
= readb((void __iomem
*) ioaddr
->nsect_addr
);
2259 lbal
= readb((void __iomem
*) ioaddr
->lbal_addr
);
2261 nsect
= inb(ioaddr
->nsect_addr
);
2262 lbal
= inb(ioaddr
->lbal_addr
);
2264 if ((nsect
== 1) && (lbal
== 1))
2266 if (time_after(jiffies
, timeout
)) {
2270 msleep(50); /* give drive a breather */
2273 ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
);
2275 /* is all this really necessary? */
2276 ap
->ops
->dev_select(ap
, 0);
2278 ap
->ops
->dev_select(ap
, 1);
2280 ap
->ops
->dev_select(ap
, 0);
2283 static unsigned int ata_bus_softreset(struct ata_port
*ap
,
2284 unsigned int devmask
)
2286 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
2288 DPRINTK("ata%u: bus reset via SRST\n", ap
->id
);
2290 /* software reset. causes dev0 to be selected */
2291 if (ap
->flags
& ATA_FLAG_MMIO
) {
2292 writeb(ap
->ctl
, (void __iomem
*) ioaddr
->ctl_addr
);
2293 udelay(20); /* FIXME: flush */
2294 writeb(ap
->ctl
| ATA_SRST
, (void __iomem
*) ioaddr
->ctl_addr
);
2295 udelay(20); /* FIXME: flush */
2296 writeb(ap
->ctl
, (void __iomem
*) ioaddr
->ctl_addr
);
2298 outb(ap
->ctl
, ioaddr
->ctl_addr
);
2300 outb(ap
->ctl
| ATA_SRST
, ioaddr
->ctl_addr
);
2302 outb(ap
->ctl
, ioaddr
->ctl_addr
);
2305 /* spec mandates ">= 2ms" before checking status.
2306 * We wait 150ms, because that was the magic delay used for
2307 * ATAPI devices in Hale Landis's ATADRVR, for the period of time
2308 * between when the ATA command register is written, and then
2309 * status is checked. Because waiting for "a while" before
2310 * checking status is fine, post SRST, we perform this magic
2311 * delay here as well.
2313 * Old drivers/ide uses the 2mS rule and then waits for ready
2317 /* Before we perform post reset processing we want to see if
2318 * the bus shows 0xFF because the odd clown forgets the D7
2319 * pulldown resistor.
2321 if (ata_check_status(ap
) == 0xFF) {
2322 ata_port_printk(ap
, KERN_ERR
, "SRST failed (status 0xFF)\n");
2323 return AC_ERR_OTHER
;
2326 ata_bus_post_reset(ap
, devmask
);
2332 * ata_bus_reset - reset host port and associated ATA channel
2333 * @ap: port to reset
2335 * This is typically the first time we actually start issuing
2336 * commands to the ATA channel. We wait for BSY to clear, then
2337 * issue EXECUTE DEVICE DIAGNOSTIC command, polling for its
2338 * result. Determine what devices, if any, are on the channel
2339 * by looking at the device 0/1 error register. Look at the signature
2340 * stored in each device's taskfile registers, to determine if
2341 * the device is ATA or ATAPI.
2344 * PCI/etc. bus probe sem.
2345 * Obtains host_set lock.
2348 * Sets ATA_FLAG_DISABLED if bus reset fails.
2351 void ata_bus_reset(struct ata_port
*ap
)
2353 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
2354 unsigned int slave_possible
= ap
->flags
& ATA_FLAG_SLAVE_POSS
;
2356 unsigned int dev0
, dev1
= 0, devmask
= 0;
2358 DPRINTK("ENTER, host %u, port %u\n", ap
->id
, ap
->port_no
);
2360 /* determine if device 0/1 are present */
2361 if (ap
->flags
& ATA_FLAG_SATA_RESET
)
2364 dev0
= ata_devchk(ap
, 0);
2366 dev1
= ata_devchk(ap
, 1);
2370 devmask
|= (1 << 0);
2372 devmask
|= (1 << 1);
2374 /* select device 0 again */
2375 ap
->ops
->dev_select(ap
, 0);
2377 /* issue bus reset */
2378 if (ap
->flags
& ATA_FLAG_SRST
)
2379 if (ata_bus_softreset(ap
, devmask
))
2383 * determine by signature whether we have ATA or ATAPI devices
2385 ap
->device
[0].class = ata_dev_try_classify(ap
, 0, &err
);
2386 if ((slave_possible
) && (err
!= 0x81))
2387 ap
->device
[1].class = ata_dev_try_classify(ap
, 1, &err
);
2389 /* re-enable interrupts */
2390 if (ap
->ioaddr
.ctl_addr
) /* FIXME: hack. create a hook instead */
2393 /* is double-select really necessary? */
2394 if (ap
->device
[1].class != ATA_DEV_NONE
)
2395 ap
->ops
->dev_select(ap
, 1);
2396 if (ap
->device
[0].class != ATA_DEV_NONE
)
2397 ap
->ops
->dev_select(ap
, 0);
2399 /* if no devices were detected, disable this port */
2400 if ((ap
->device
[0].class == ATA_DEV_NONE
) &&
2401 (ap
->device
[1].class == ATA_DEV_NONE
))
2404 if (ap
->flags
& (ATA_FLAG_SATA_RESET
| ATA_FLAG_SRST
)) {
2405 /* set up device control for ATA_FLAG_SATA_RESET */
2406 if (ap
->flags
& ATA_FLAG_MMIO
)
2407 writeb(ap
->ctl
, (void __iomem
*) ioaddr
->ctl_addr
);
2409 outb(ap
->ctl
, ioaddr
->ctl_addr
);
2416 ata_port_printk(ap
, KERN_ERR
, "disabling port\n");
2417 ap
->ops
->port_disable(ap
);
2422 static int sata_phy_resume(struct ata_port
*ap
)
2424 unsigned long timeout
= jiffies
+ (HZ
* 5);
2425 u32 scontrol
, sstatus
;
2428 if ((rc
= sata_scr_read(ap
, SCR_CONTROL
, &scontrol
)))
2431 scontrol
= (scontrol
& 0x0f0) | 0x300;
2433 if ((rc
= sata_scr_write(ap
, SCR_CONTROL
, scontrol
)))
2436 /* Wait for phy to become ready, if necessary. */
2439 if ((rc
= sata_scr_read(ap
, SCR_STATUS
, &sstatus
)))
2441 if ((sstatus
& 0xf) != 1)
2443 } while (time_before(jiffies
, timeout
));
2449 * ata_std_probeinit - initialize probing
2450 * @ap: port to be probed
2452 * @ap is about to be probed. Initialize it. This function is
2453 * to be used as standard callback for ata_drive_probe_reset().
2455 * NOTE!!! Do not use this function as probeinit if a low level
2456 * driver implements only hardreset. Just pass NULL as probeinit
2457 * in that case. Using this function is probably okay but doing
2458 * so makes reset sequence different from the original
2459 * ->phy_reset implementation and Jeff nervous. :-P
2461 void ata_std_probeinit(struct ata_port
*ap
)
2466 sata_phy_resume(ap
);
2468 /* init sata_spd_limit to the current value */
2469 if (sata_scr_read(ap
, SCR_CONTROL
, &scontrol
) == 0) {
2470 int spd
= (scontrol
>> 4) & 0xf;
2471 ap
->sata_spd_limit
&= (1 << spd
) - 1;
2474 /* wait for device */
2475 if (ata_port_online(ap
))
2476 ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
);
2480 * ata_std_softreset - reset host port via ATA SRST
2481 * @ap: port to reset
2482 * @classes: resulting classes of attached devices
2484 * Reset host port using ATA SRST. This function is to be used
2485 * as standard callback for ata_drive_*_reset() functions.
2488 * Kernel thread context (may sleep)
2491 * 0 on success, -errno otherwise.
2493 int ata_std_softreset(struct ata_port
*ap
, unsigned int *classes
)
2495 unsigned int slave_possible
= ap
->flags
& ATA_FLAG_SLAVE_POSS
;
2496 unsigned int devmask
= 0, err_mask
;
2501 if (ata_port_offline(ap
)) {
2502 classes
[0] = ATA_DEV_NONE
;
2506 /* determine if device 0/1 are present */
2507 if (ata_devchk(ap
, 0))
2508 devmask
|= (1 << 0);
2509 if (slave_possible
&& ata_devchk(ap
, 1))
2510 devmask
|= (1 << 1);
2512 /* select device 0 again */
2513 ap
->ops
->dev_select(ap
, 0);
2515 /* issue bus reset */
2516 DPRINTK("about to softreset, devmask=%x\n", devmask
);
2517 err_mask
= ata_bus_softreset(ap
, devmask
);
2519 ata_port_printk(ap
, KERN_ERR
, "SRST failed (err_mask=0x%x)\n",
2524 /* determine by signature whether we have ATA or ATAPI devices */
2525 classes
[0] = ata_dev_try_classify(ap
, 0, &err
);
2526 if (slave_possible
&& err
!= 0x81)
2527 classes
[1] = ata_dev_try_classify(ap
, 1, &err
);
2530 DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes
[0], classes
[1]);
2535 * sata_std_hardreset - reset host port via SATA phy reset
2536 * @ap: port to reset
2537 * @class: resulting class of attached device
2539 * SATA phy-reset host port using DET bits of SControl register.
2540 * This function is to be used as standard callback for
2541 * ata_drive_*_reset().
2544 * Kernel thread context (may sleep)
2547 * 0 on success, -errno otherwise.
2549 int sata_std_hardreset(struct ata_port
*ap
, unsigned int *class)
2556 if (sata_set_spd_needed(ap
)) {
2557 /* SATA spec says nothing about how to reconfigure
2558 * spd. To be on the safe side, turn off phy during
2559 * reconfiguration. This works for at least ICH7 AHCI
2562 if ((rc
= sata_scr_read(ap
, SCR_CONTROL
, &scontrol
)))
2565 scontrol
= (scontrol
& 0x0f0) | 0x302;
2567 if ((rc
= sata_scr_write(ap
, SCR_CONTROL
, scontrol
)))
2573 /* issue phy wake/reset */
2574 if ((rc
= sata_scr_read(ap
, SCR_CONTROL
, &scontrol
)))
2577 scontrol
= (scontrol
& 0x0f0) | 0x301;
2579 if ((rc
= sata_scr_write_flush(ap
, SCR_CONTROL
, scontrol
)))
2582 /* Couldn't find anything in SATA I/II specs, but AHCI-1.1
2583 * 10.4.2 says at least 1 ms.
2587 /* bring phy back */
2588 sata_phy_resume(ap
);
2590 /* TODO: phy layer with polling, timeouts, etc. */
2591 if (ata_port_offline(ap
)) {
2592 *class = ATA_DEV_NONE
;
2593 DPRINTK("EXIT, link offline\n");
2597 if (ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
)) {
2598 ata_port_printk(ap
, KERN_ERR
,
2599 "COMRESET failed (device not ready)\n");
2603 ap
->ops
->dev_select(ap
, 0); /* probably unnecessary */
2605 *class = ata_dev_try_classify(ap
, 0, NULL
);
2607 DPRINTK("EXIT, class=%u\n", *class);
2612 * ata_std_postreset - standard postreset callback
2613 * @ap: the target ata_port
2614 * @classes: classes of attached devices
2616 * This function is invoked after a successful reset. Note that
2617 * the device might have been reset more than once using
2618 * different reset methods before postreset is invoked.
2620 * This function is to be used as standard callback for
2621 * ata_drive_*_reset().
2624 * Kernel thread context (may sleep)
2626 void ata_std_postreset(struct ata_port
*ap
, unsigned int *classes
)
2632 /* print link status */
2633 sata_print_link_status(ap
);
2636 if (sata_scr_read(ap
, SCR_ERROR
, &serror
) == 0)
2637 sata_scr_write(ap
, SCR_ERROR
, serror
);
2639 /* re-enable interrupts */
2640 if (!ap
->ops
->error_handler
) {
2641 /* FIXME: hack. create a hook instead */
2642 if (ap
->ioaddr
.ctl_addr
)
2646 /* is double-select really necessary? */
2647 if (classes
[0] != ATA_DEV_NONE
)
2648 ap
->ops
->dev_select(ap
, 1);
2649 if (classes
[1] != ATA_DEV_NONE
)
2650 ap
->ops
->dev_select(ap
, 0);
2652 /* bail out if no device is present */
2653 if (classes
[0] == ATA_DEV_NONE
&& classes
[1] == ATA_DEV_NONE
) {
2654 DPRINTK("EXIT, no device\n");
2658 /* set up device control */
2659 if (ap
->ioaddr
.ctl_addr
) {
2660 if (ap
->flags
& ATA_FLAG_MMIO
)
2661 writeb(ap
->ctl
, (void __iomem
*) ap
->ioaddr
.ctl_addr
);
2663 outb(ap
->ctl
, ap
->ioaddr
.ctl_addr
);
2670 * ata_std_probe_reset - standard probe reset method
2671 * @ap: prot to perform probe-reset
2672 * @classes: resulting classes of attached devices
2674 * The stock off-the-shelf ->probe_reset method.
2677 * Kernel thread context (may sleep)
2680 * 0 on success, -errno otherwise.
2682 int ata_std_probe_reset(struct ata_port
*ap
, unsigned int *classes
)
2684 ata_reset_fn_t hardreset
;
2687 if (sata_scr_valid(ap
))
2688 hardreset
= sata_std_hardreset
;
2690 return ata_drive_probe_reset(ap
, ata_std_probeinit
,
2691 ata_std_softreset
, hardreset
,
2692 ata_std_postreset
, classes
);
2695 int ata_do_reset(struct ata_port
*ap
, ata_reset_fn_t reset
,
2696 unsigned int *classes
)
2700 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
2701 classes
[i
] = ATA_DEV_UNKNOWN
;
2703 rc
= reset(ap
, classes
);
2707 /* If any class isn't ATA_DEV_UNKNOWN, consider classification
2708 * is complete and convert all ATA_DEV_UNKNOWN to
2711 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
2712 if (classes
[i
] != ATA_DEV_UNKNOWN
)
2715 if (i
< ATA_MAX_DEVICES
)
2716 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
2717 if (classes
[i
] == ATA_DEV_UNKNOWN
)
2718 classes
[i
] = ATA_DEV_NONE
;
2724 * ata_drive_probe_reset - Perform probe reset with given methods
2725 * @ap: port to reset
2726 * @probeinit: probeinit method (can be NULL)
2727 * @softreset: softreset method (can be NULL)
2728 * @hardreset: hardreset method (can be NULL)
2729 * @postreset: postreset method (can be NULL)
2730 * @classes: resulting classes of attached devices
2732 * Reset the specified port and classify attached devices using
2733 * given methods. This function prefers softreset but tries all
2734 * possible reset sequences to reset and classify devices. This
2735 * function is intended to be used for constructing ->probe_reset
2736 * callback by low level drivers.
2738 * Reset methods should follow the following rules.
2740 * - Return 0 on sucess, -errno on failure.
2741 * - If classification is supported, fill classes[] with
2742 * recognized class codes.
2743 * - If classification is not supported, leave classes[] alone.
2746 * Kernel thread context (may sleep)
2749 * 0 on success, -EINVAL if no reset method is avaliable, -ENODEV
2750 * if classification fails, and any error code from reset
2753 int ata_drive_probe_reset(struct ata_port
*ap
, ata_probeinit_fn_t probeinit
,
2754 ata_reset_fn_t softreset
, ata_reset_fn_t hardreset
,
2755 ata_postreset_fn_t postreset
, unsigned int *classes
)
2759 ata_eh_freeze_port(ap
);
2764 if (softreset
&& !sata_set_spd_needed(ap
)) {
2765 rc
= ata_do_reset(ap
, softreset
, classes
);
2766 if (rc
== 0 && classes
[0] != ATA_DEV_UNKNOWN
)
2768 ata_port_printk(ap
, KERN_INFO
, "softreset failed, "
2769 "will try hardreset in 5 secs\n");
2777 rc
= ata_do_reset(ap
, hardreset
, classes
);
2779 if (classes
[0] != ATA_DEV_UNKNOWN
)
2784 if (sata_down_spd_limit(ap
))
2787 ata_port_printk(ap
, KERN_INFO
, "hardreset failed, "
2788 "will retry in 5 secs\n");
2793 ata_port_printk(ap
, KERN_INFO
,
2794 "hardreset succeeded without classification, "
2795 "will retry softreset in 5 secs\n");
2798 rc
= ata_do_reset(ap
, softreset
, classes
);
2804 postreset(ap
, classes
);
2806 ata_eh_thaw_port(ap
);
2808 if (classes
[0] == ATA_DEV_UNKNOWN
)
2815 * ata_dev_same_device - Determine whether new ID matches configured device
2816 * @dev: device to compare against
2817 * @new_class: class of the new device
2818 * @new_id: IDENTIFY page of the new device
2820 * Compare @new_class and @new_id against @dev and determine
2821 * whether @dev is the device indicated by @new_class and
2828 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
2830 static int ata_dev_same_device(struct ata_device
*dev
, unsigned int new_class
,
2833 const u16
*old_id
= dev
->id
;
2834 unsigned char model
[2][41], serial
[2][21];
2837 if (dev
->class != new_class
) {
2838 ata_dev_printk(dev
, KERN_INFO
, "class mismatch %d != %d\n",
2839 dev
->class, new_class
);
2843 ata_id_c_string(old_id
, model
[0], ATA_ID_PROD_OFS
, sizeof(model
[0]));
2844 ata_id_c_string(new_id
, model
[1], ATA_ID_PROD_OFS
, sizeof(model
[1]));
2845 ata_id_c_string(old_id
, serial
[0], ATA_ID_SERNO_OFS
, sizeof(serial
[0]));
2846 ata_id_c_string(new_id
, serial
[1], ATA_ID_SERNO_OFS
, sizeof(serial
[1]));
2847 new_n_sectors
= ata_id_n_sectors(new_id
);
2849 if (strcmp(model
[0], model
[1])) {
2850 ata_dev_printk(dev
, KERN_INFO
, "model number mismatch "
2851 "'%s' != '%s'\n", model
[0], model
[1]);
2855 if (strcmp(serial
[0], serial
[1])) {
2856 ata_dev_printk(dev
, KERN_INFO
, "serial number mismatch "
2857 "'%s' != '%s'\n", serial
[0], serial
[1]);
2861 if (dev
->class == ATA_DEV_ATA
&& dev
->n_sectors
!= new_n_sectors
) {
2862 ata_dev_printk(dev
, KERN_INFO
, "n_sectors mismatch "
2864 (unsigned long long)dev
->n_sectors
,
2865 (unsigned long long)new_n_sectors
);
2873 * ata_dev_revalidate - Revalidate ATA device
2874 * @dev: device to revalidate
2875 * @post_reset: is this revalidation after reset?
2877 * Re-read IDENTIFY page and make sure @dev is still attached to
2881 * Kernel thread context (may sleep)
2884 * 0 on success, negative errno otherwise
2886 int ata_dev_revalidate(struct ata_device
*dev
, int post_reset
)
2888 unsigned int class = dev
->class;
2889 u16
*id
= (void *)dev
->ap
->sector_buf
;
2892 if (!ata_dev_enabled(dev
)) {
2898 rc
= ata_dev_read_id(dev
, &class, post_reset
, id
);
2902 /* is the device still there? */
2903 if (!ata_dev_same_device(dev
, class, id
)) {
2908 memcpy(dev
->id
, id
, sizeof(id
[0]) * ATA_ID_WORDS
);
2910 /* configure device according to the new ID */
2911 rc
= ata_dev_configure(dev
, 0);
2916 ata_dev_printk(dev
, KERN_ERR
, "revalidation failed (errno=%d)\n", rc
);
2920 static const char * const ata_dma_blacklist
[] = {
2921 "WDC AC11000H", NULL
,
2922 "WDC AC22100H", NULL
,
2923 "WDC AC32500H", NULL
,
2924 "WDC AC33100H", NULL
,
2925 "WDC AC31600H", NULL
,
2926 "WDC AC32100H", "24.09P07",
2927 "WDC AC23200L", "21.10N21",
2928 "Compaq CRD-8241B", NULL
,
2933 "SanDisk SDP3B", NULL
,
2934 "SanDisk SDP3B-64", NULL
,
2935 "SANYO CD-ROM CRD", NULL
,
2936 "HITACHI CDR-8", NULL
,
2937 "HITACHI CDR-8335", NULL
,
2938 "HITACHI CDR-8435", NULL
,
2939 "Toshiba CD-ROM XM-6202B", NULL
,
2940 "TOSHIBA CD-ROM XM-1702BC", NULL
,
2942 "E-IDE CD-ROM CR-840", NULL
,
2943 "CD-ROM Drive/F5A", NULL
,
2944 "WPI CDD-820", NULL
,
2945 "SAMSUNG CD-ROM SC-148C", NULL
,
2946 "SAMSUNG CD-ROM SC", NULL
,
2947 "SanDisk SDP3B-64", NULL
,
2948 "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL
,
2949 "_NEC DV5800A", NULL
,
2950 "SAMSUNG CD-ROM SN-124", "N001"
2953 static int ata_strim(char *s
, size_t len
)
2955 len
= strnlen(s
, len
);
2957 /* ATAPI specifies that empty space is blank-filled; remove blanks */
2958 while ((len
> 0) && (s
[len
- 1] == ' ')) {
2965 static int ata_dma_blacklisted(const struct ata_device
*dev
)
2967 unsigned char model_num
[40];
2968 unsigned char model_rev
[16];
2969 unsigned int nlen
, rlen
;
2972 ata_id_string(dev
->id
, model_num
, ATA_ID_PROD_OFS
,
2974 ata_id_string(dev
->id
, model_rev
, ATA_ID_FW_REV_OFS
,
2976 nlen
= ata_strim(model_num
, sizeof(model_num
));
2977 rlen
= ata_strim(model_rev
, sizeof(model_rev
));
2979 for (i
= 0; i
< ARRAY_SIZE(ata_dma_blacklist
); i
+= 2) {
2980 if (!strncmp(ata_dma_blacklist
[i
], model_num
, nlen
)) {
2981 if (ata_dma_blacklist
[i
+1] == NULL
)
2983 if (!strncmp(ata_dma_blacklist
[i
], model_rev
, rlen
))
2991 * ata_dev_xfermask - Compute supported xfermask of the given device
2992 * @dev: Device to compute xfermask for
2994 * Compute supported xfermask of @dev and store it in
2995 * dev->*_mask. This function is responsible for applying all
2996 * known limits including host controller limits, device
2999 * FIXME: The current implementation limits all transfer modes to
3000 * the fastest of the lowested device on the port. This is not
3001 * required on most controllers.
3006 static void ata_dev_xfermask(struct ata_device
*dev
)
3008 struct ata_port
*ap
= dev
->ap
;
3009 struct ata_host_set
*hs
= ap
->host_set
;
3010 unsigned long xfer_mask
;
3013 xfer_mask
= ata_pack_xfermask(ap
->pio_mask
,
3014 ap
->mwdma_mask
, ap
->udma_mask
);
3016 /* Apply cable rule here. Don't apply it early because when
3017 * we handle hot plug the cable type can itself change.
3019 if (ap
->cbl
== ATA_CBL_PATA40
)
3020 xfer_mask
&= ~(0xF8 << ATA_SHIFT_UDMA
);
3022 /* FIXME: Use port-wide xfermask for now */
3023 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
3024 struct ata_device
*d
= &ap
->device
[i
];
3026 if (ata_dev_absent(d
))
3029 if (ata_dev_disabled(d
)) {
3030 /* to avoid violating device selection timing */
3031 xfer_mask
&= ata_pack_xfermask(d
->pio_mask
,
3032 UINT_MAX
, UINT_MAX
);
3036 xfer_mask
&= ata_pack_xfermask(d
->pio_mask
,
3037 d
->mwdma_mask
, d
->udma_mask
);
3038 xfer_mask
&= ata_id_xfermask(d
->id
);
3039 if (ata_dma_blacklisted(d
))
3040 xfer_mask
&= ~(ATA_MASK_MWDMA
| ATA_MASK_UDMA
);
3043 if (ata_dma_blacklisted(dev
))
3044 ata_dev_printk(dev
, KERN_WARNING
,
3045 "device is on DMA blacklist, disabling DMA\n");
3047 if (hs
->flags
& ATA_HOST_SIMPLEX
) {
3048 if (hs
->simplex_claimed
)
3049 xfer_mask
&= ~(ATA_MASK_MWDMA
| ATA_MASK_UDMA
);
3052 if (ap
->ops
->mode_filter
)
3053 xfer_mask
= ap
->ops
->mode_filter(ap
, dev
, xfer_mask
);
3055 ata_unpack_xfermask(xfer_mask
, &dev
->pio_mask
,
3056 &dev
->mwdma_mask
, &dev
->udma_mask
);
3060 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
3061 * @dev: Device to which command will be sent
3063 * Issue SET FEATURES - XFER MODE command to device @dev
3067 * PCI/etc. bus probe sem.
3070 * 0 on success, AC_ERR_* mask otherwise.
3073 static unsigned int ata_dev_set_xfermode(struct ata_device
*dev
)
3075 struct ata_taskfile tf
;
3076 unsigned int err_mask
;
3078 /* set up set-features taskfile */
3079 DPRINTK("set features - xfer mode\n");
3081 ata_tf_init(dev
, &tf
);
3082 tf
.command
= ATA_CMD_SET_FEATURES
;
3083 tf
.feature
= SETFEATURES_XFER
;
3084 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
3085 tf
.protocol
= ATA_PROT_NODATA
;
3086 tf
.nsect
= dev
->xfer_mode
;
3088 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0);
3090 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
3095 * ata_dev_init_params - Issue INIT DEV PARAMS command
3096 * @dev: Device to which command will be sent
3097 * @heads: Number of heads (taskfile parameter)
3098 * @sectors: Number of sectors (taskfile parameter)
3101 * Kernel thread context (may sleep)
3104 * 0 on success, AC_ERR_* mask otherwise.
3106 static unsigned int ata_dev_init_params(struct ata_device
*dev
,
3107 u16 heads
, u16 sectors
)
3109 struct ata_taskfile tf
;
3110 unsigned int err_mask
;
3112 /* Number of sectors per track 1-255. Number of heads 1-16 */
3113 if (sectors
< 1 || sectors
> 255 || heads
< 1 || heads
> 16)
3114 return AC_ERR_INVALID
;
3116 /* set up init dev params taskfile */
3117 DPRINTK("init dev params \n");
3119 ata_tf_init(dev
, &tf
);
3120 tf
.command
= ATA_CMD_INIT_DEV_PARAMS
;
3121 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
3122 tf
.protocol
= ATA_PROT_NODATA
;
3124 tf
.device
|= (heads
- 1) & 0x0f; /* max head = num. of heads - 1 */
3126 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0);
3128 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
3133 * ata_sg_clean - Unmap DMA memory associated with command
3134 * @qc: Command containing DMA memory to be released
3136 * Unmap all mapped DMA memory associated with this command.
3139 * spin_lock_irqsave(host_set lock)
3142 static void ata_sg_clean(struct ata_queued_cmd
*qc
)
3144 struct ata_port
*ap
= qc
->ap
;
3145 struct scatterlist
*sg
= qc
->__sg
;
3146 int dir
= qc
->dma_dir
;
3147 void *pad_buf
= NULL
;
3149 WARN_ON(!(qc
->flags
& ATA_QCFLAG_DMAMAP
));
3150 WARN_ON(sg
== NULL
);
3152 if (qc
->flags
& ATA_QCFLAG_SINGLE
)
3153 WARN_ON(qc
->n_elem
> 1);
3155 VPRINTK("unmapping %u sg elements\n", qc
->n_elem
);
3157 /* if we padded the buffer out to 32-bit bound, and data
3158 * xfer direction is from-device, we must copy from the
3159 * pad buffer back into the supplied buffer
3161 if (qc
->pad_len
&& !(qc
->tf
.flags
& ATA_TFLAG_WRITE
))
3162 pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
3164 if (qc
->flags
& ATA_QCFLAG_SG
) {
3166 dma_unmap_sg(ap
->dev
, sg
, qc
->n_elem
, dir
);
3167 /* restore last sg */
3168 sg
[qc
->orig_n_elem
- 1].length
+= qc
->pad_len
;
3170 struct scatterlist
*psg
= &qc
->pad_sgent
;
3171 void *addr
= kmap_atomic(psg
->page
, KM_IRQ0
);
3172 memcpy(addr
+ psg
->offset
, pad_buf
, qc
->pad_len
);
3173 kunmap_atomic(addr
, KM_IRQ0
);
3177 dma_unmap_single(ap
->dev
,
3178 sg_dma_address(&sg
[0]), sg_dma_len(&sg
[0]),
3181 sg
->length
+= qc
->pad_len
;
3183 memcpy(qc
->buf_virt
+ sg
->length
- qc
->pad_len
,
3184 pad_buf
, qc
->pad_len
);
3187 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
3192 * ata_fill_sg - Fill PCI IDE PRD table
3193 * @qc: Metadata associated with taskfile to be transferred
3195 * Fill PCI IDE PRD (scatter-gather) table with segments
3196 * associated with the current disk command.
3199 * spin_lock_irqsave(host_set lock)
3202 static void ata_fill_sg(struct ata_queued_cmd
*qc
)
3204 struct ata_port
*ap
= qc
->ap
;
3205 struct scatterlist
*sg
;
3208 WARN_ON(qc
->__sg
== NULL
);
3209 WARN_ON(qc
->n_elem
== 0 && qc
->pad_len
== 0);
3212 ata_for_each_sg(sg
, qc
) {
3216 /* determine if physical DMA addr spans 64K boundary.
3217 * Note h/w doesn't support 64-bit, so we unconditionally
3218 * truncate dma_addr_t to u32.
3220 addr
= (u32
) sg_dma_address(sg
);
3221 sg_len
= sg_dma_len(sg
);
3224 offset
= addr
& 0xffff;
3226 if ((offset
+ sg_len
) > 0x10000)
3227 len
= 0x10000 - offset
;
3229 ap
->prd
[idx
].addr
= cpu_to_le32(addr
);
3230 ap
->prd
[idx
].flags_len
= cpu_to_le32(len
& 0xffff);
3231 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx
, addr
, len
);
3240 ap
->prd
[idx
- 1].flags_len
|= cpu_to_le32(ATA_PRD_EOT
);
3243 * ata_check_atapi_dma - Check whether ATAPI DMA can be supported
3244 * @qc: Metadata associated with taskfile to check
3246 * Allow low-level driver to filter ATA PACKET commands, returning
3247 * a status indicating whether or not it is OK to use DMA for the
3248 * supplied PACKET command.
3251 * spin_lock_irqsave(host_set lock)
3253 * RETURNS: 0 when ATAPI DMA can be used
3256 int ata_check_atapi_dma(struct ata_queued_cmd
*qc
)
3258 struct ata_port
*ap
= qc
->ap
;
3259 int rc
= 0; /* Assume ATAPI DMA is OK by default */
3261 if (ap
->ops
->check_atapi_dma
)
3262 rc
= ap
->ops
->check_atapi_dma(qc
);
3264 /* We don't support polling DMA.
3265 * Use PIO if the LLDD handles only interrupts in
3266 * the HSM_ST_LAST state and the ATAPI device
3267 * generates CDB interrupts.
3269 if ((ap
->flags
& ATA_FLAG_PIO_POLLING
) &&
3270 (qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
))
3276 * ata_qc_prep - Prepare taskfile for submission
3277 * @qc: Metadata associated with taskfile to be prepared
3279 * Prepare ATA taskfile for submission.
3282 * spin_lock_irqsave(host_set lock)
3284 void ata_qc_prep(struct ata_queued_cmd
*qc
)
3286 if (!(qc
->flags
& ATA_QCFLAG_DMAMAP
))
3292 void ata_noop_qc_prep(struct ata_queued_cmd
*qc
) { }
3295 * ata_sg_init_one - Associate command with memory buffer
3296 * @qc: Command to be associated
3297 * @buf: Memory buffer
3298 * @buflen: Length of memory buffer, in bytes.
3300 * Initialize the data-related elements of queued_cmd @qc
3301 * to point to a single memory buffer, @buf of byte length @buflen.
3304 * spin_lock_irqsave(host_set lock)
3307 void ata_sg_init_one(struct ata_queued_cmd
*qc
, void *buf
, unsigned int buflen
)
3309 struct scatterlist
*sg
;
3311 qc
->flags
|= ATA_QCFLAG_SINGLE
;
3313 memset(&qc
->sgent
, 0, sizeof(qc
->sgent
));
3314 qc
->__sg
= &qc
->sgent
;
3316 qc
->orig_n_elem
= 1;
3320 sg_init_one(sg
, buf
, buflen
);
3324 * ata_sg_init - Associate command with scatter-gather table.
3325 * @qc: Command to be associated
3326 * @sg: Scatter-gather table.
3327 * @n_elem: Number of elements in s/g table.
3329 * Initialize the data-related elements of queued_cmd @qc
3330 * to point to a scatter-gather table @sg, containing @n_elem
3334 * spin_lock_irqsave(host_set lock)
3337 void ata_sg_init(struct ata_queued_cmd
*qc
, struct scatterlist
*sg
,
3338 unsigned int n_elem
)
3340 qc
->flags
|= ATA_QCFLAG_SG
;
3342 qc
->n_elem
= n_elem
;
3343 qc
->orig_n_elem
= n_elem
;
3347 * ata_sg_setup_one - DMA-map the memory buffer associated with a command.
3348 * @qc: Command with memory buffer to be mapped.
3350 * DMA-map the memory buffer associated with queued_cmd @qc.
3353 * spin_lock_irqsave(host_set lock)
3356 * Zero on success, negative on error.
3359 static int ata_sg_setup_one(struct ata_queued_cmd
*qc
)
3361 struct ata_port
*ap
= qc
->ap
;
3362 int dir
= qc
->dma_dir
;
3363 struct scatterlist
*sg
= qc
->__sg
;
3364 dma_addr_t dma_address
;
3367 /* we must lengthen transfers to end on a 32-bit boundary */
3368 qc
->pad_len
= sg
->length
& 3;
3370 void *pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
3371 struct scatterlist
*psg
= &qc
->pad_sgent
;
3373 WARN_ON(qc
->dev
->class != ATA_DEV_ATAPI
);
3375 memset(pad_buf
, 0, ATA_DMA_PAD_SZ
);
3377 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
)
3378 memcpy(pad_buf
, qc
->buf_virt
+ sg
->length
- qc
->pad_len
,
3381 sg_dma_address(psg
) = ap
->pad_dma
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
3382 sg_dma_len(psg
) = ATA_DMA_PAD_SZ
;
3384 sg
->length
-= qc
->pad_len
;
3385 if (sg
->length
== 0)
3388 DPRINTK("padding done, sg->length=%u pad_len=%u\n",
3389 sg
->length
, qc
->pad_len
);
3397 dma_address
= dma_map_single(ap
->dev
, qc
->buf_virt
,
3399 if (dma_mapping_error(dma_address
)) {
3401 sg
->length
+= qc
->pad_len
;
3405 sg_dma_address(sg
) = dma_address
;
3406 sg_dma_len(sg
) = sg
->length
;
3409 DPRINTK("mapped buffer of %d bytes for %s\n", sg_dma_len(sg
),
3410 qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
3416 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
3417 * @qc: Command with scatter-gather table to be mapped.
3419 * DMA-map the scatter-gather table associated with queued_cmd @qc.
3422 * spin_lock_irqsave(host_set lock)
3425 * Zero on success, negative on error.
3429 static int ata_sg_setup(struct ata_queued_cmd
*qc
)
3431 struct ata_port
*ap
= qc
->ap
;
3432 struct scatterlist
*sg
= qc
->__sg
;
3433 struct scatterlist
*lsg
= &sg
[qc
->n_elem
- 1];
3434 int n_elem
, pre_n_elem
, dir
, trim_sg
= 0;
3436 VPRINTK("ENTER, ata%u\n", ap
->id
);
3437 WARN_ON(!(qc
->flags
& ATA_QCFLAG_SG
));
3439 /* we must lengthen transfers to end on a 32-bit boundary */
3440 qc
->pad_len
= lsg
->length
& 3;
3442 void *pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
3443 struct scatterlist
*psg
= &qc
->pad_sgent
;
3444 unsigned int offset
;
3446 WARN_ON(qc
->dev
->class != ATA_DEV_ATAPI
);
3448 memset(pad_buf
, 0, ATA_DMA_PAD_SZ
);
3451 * psg->page/offset are used to copy to-be-written
3452 * data in this function or read data in ata_sg_clean.
3454 offset
= lsg
->offset
+ lsg
->length
- qc
->pad_len
;
3455 psg
->page
= nth_page(lsg
->page
, offset
>> PAGE_SHIFT
);
3456 psg
->offset
= offset_in_page(offset
);
3458 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
) {
3459 void *addr
= kmap_atomic(psg
->page
, KM_IRQ0
);
3460 memcpy(pad_buf
, addr
+ psg
->offset
, qc
->pad_len
);
3461 kunmap_atomic(addr
, KM_IRQ0
);
3464 sg_dma_address(psg
) = ap
->pad_dma
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
3465 sg_dma_len(psg
) = ATA_DMA_PAD_SZ
;
3467 lsg
->length
-= qc
->pad_len
;
3468 if (lsg
->length
== 0)
3471 DPRINTK("padding done, sg[%d].length=%u pad_len=%u\n",
3472 qc
->n_elem
- 1, lsg
->length
, qc
->pad_len
);
3475 pre_n_elem
= qc
->n_elem
;
3476 if (trim_sg
&& pre_n_elem
)
3485 n_elem
= dma_map_sg(ap
->dev
, sg
, pre_n_elem
, dir
);
3487 /* restore last sg */
3488 lsg
->length
+= qc
->pad_len
;
3492 DPRINTK("%d sg elements mapped\n", n_elem
);
3495 qc
->n_elem
= n_elem
;
3501 * swap_buf_le16 - swap halves of 16-bit words in place
3502 * @buf: Buffer to swap
3503 * @buf_words: Number of 16-bit words in buffer.
3505 * Swap halves of 16-bit words if needed to convert from
3506 * little-endian byte order to native cpu byte order, or
3510 * Inherited from caller.
3512 void swap_buf_le16(u16
*buf
, unsigned int buf_words
)
3517 for (i
= 0; i
< buf_words
; i
++)
3518 buf
[i
] = le16_to_cpu(buf
[i
]);
3519 #endif /* __BIG_ENDIAN */
3523 * ata_mmio_data_xfer - Transfer data by MMIO
3524 * @ap: port to read/write
3526 * @buflen: buffer length
3527 * @write_data: read/write
3529 * Transfer data from/to the device data register by MMIO.
3532 * Inherited from caller.
3535 static void ata_mmio_data_xfer(struct ata_port
*ap
, unsigned char *buf
,
3536 unsigned int buflen
, int write_data
)
3539 unsigned int words
= buflen
>> 1;
3540 u16
*buf16
= (u16
*) buf
;
3541 void __iomem
*mmio
= (void __iomem
*)ap
->ioaddr
.data_addr
;
3543 /* Transfer multiple of 2 bytes */
3545 for (i
= 0; i
< words
; i
++)
3546 writew(le16_to_cpu(buf16
[i
]), mmio
);
3548 for (i
= 0; i
< words
; i
++)
3549 buf16
[i
] = cpu_to_le16(readw(mmio
));
3552 /* Transfer trailing 1 byte, if any. */
3553 if (unlikely(buflen
& 0x01)) {
3554 u16 align_buf
[1] = { 0 };
3555 unsigned char *trailing_buf
= buf
+ buflen
- 1;
3558 memcpy(align_buf
, trailing_buf
, 1);
3559 writew(le16_to_cpu(align_buf
[0]), mmio
);
3561 align_buf
[0] = cpu_to_le16(readw(mmio
));
3562 memcpy(trailing_buf
, align_buf
, 1);
3568 * ata_pio_data_xfer - Transfer data by PIO
3569 * @ap: port to read/write
3571 * @buflen: buffer length
3572 * @write_data: read/write
3574 * Transfer data from/to the device data register by PIO.
3577 * Inherited from caller.
3580 static void ata_pio_data_xfer(struct ata_port
*ap
, unsigned char *buf
,
3581 unsigned int buflen
, int write_data
)
3583 unsigned int words
= buflen
>> 1;
3585 /* Transfer multiple of 2 bytes */
3587 outsw(ap
->ioaddr
.data_addr
, buf
, words
);
3589 insw(ap
->ioaddr
.data_addr
, buf
, words
);
3591 /* Transfer trailing 1 byte, if any. */
3592 if (unlikely(buflen
& 0x01)) {
3593 u16 align_buf
[1] = { 0 };
3594 unsigned char *trailing_buf
= buf
+ buflen
- 1;
3597 memcpy(align_buf
, trailing_buf
, 1);
3598 outw(le16_to_cpu(align_buf
[0]), ap
->ioaddr
.data_addr
);
3600 align_buf
[0] = cpu_to_le16(inw(ap
->ioaddr
.data_addr
));
3601 memcpy(trailing_buf
, align_buf
, 1);
3607 * ata_data_xfer - Transfer data from/to the data register.
3608 * @ap: port to read/write
3610 * @buflen: buffer length
3611 * @do_write: read/write
3613 * Transfer data from/to the device data register.
3616 * Inherited from caller.
3619 static void ata_data_xfer(struct ata_port
*ap
, unsigned char *buf
,
3620 unsigned int buflen
, int do_write
)
3622 /* Make the crap hardware pay the costs not the good stuff */
3623 if (unlikely(ap
->flags
& ATA_FLAG_IRQ_MASK
)) {
3624 unsigned long flags
;
3625 local_irq_save(flags
);
3626 if (ap
->flags
& ATA_FLAG_MMIO
)
3627 ata_mmio_data_xfer(ap
, buf
, buflen
, do_write
);
3629 ata_pio_data_xfer(ap
, buf
, buflen
, do_write
);
3630 local_irq_restore(flags
);
3632 if (ap
->flags
& ATA_FLAG_MMIO
)
3633 ata_mmio_data_xfer(ap
, buf
, buflen
, do_write
);
3635 ata_pio_data_xfer(ap
, buf
, buflen
, do_write
);
3640 * ata_pio_sector - Transfer ATA_SECT_SIZE (512 bytes) of data.
3641 * @qc: Command on going
3643 * Transfer ATA_SECT_SIZE of data from/to the ATA device.
3646 * Inherited from caller.
3649 static void ata_pio_sector(struct ata_queued_cmd
*qc
)
3651 int do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
);
3652 struct scatterlist
*sg
= qc
->__sg
;
3653 struct ata_port
*ap
= qc
->ap
;
3655 unsigned int offset
;
3658 if (qc
->cursect
== (qc
->nsect
- 1))
3659 ap
->hsm_task_state
= HSM_ST_LAST
;
3661 page
= sg
[qc
->cursg
].page
;
3662 offset
= sg
[qc
->cursg
].offset
+ qc
->cursg_ofs
* ATA_SECT_SIZE
;
3664 /* get the current page and offset */
3665 page
= nth_page(page
, (offset
>> PAGE_SHIFT
));
3666 offset
%= PAGE_SIZE
;
3668 DPRINTK("data %s\n", qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
3670 if (PageHighMem(page
)) {
3671 unsigned long flags
;
3673 local_irq_save(flags
);
3674 buf
= kmap_atomic(page
, KM_IRQ0
);
3676 /* do the actual data transfer */
3677 ata_data_xfer(ap
, buf
+ offset
, ATA_SECT_SIZE
, do_write
);
3679 kunmap_atomic(buf
, KM_IRQ0
);
3680 local_irq_restore(flags
);
3682 buf
= page_address(page
);
3683 ata_data_xfer(ap
, buf
+ offset
, ATA_SECT_SIZE
, do_write
);
3689 if ((qc
->cursg_ofs
* ATA_SECT_SIZE
) == (&sg
[qc
->cursg
])->length
) {
3696 * ata_pio_sectors - Transfer one or many 512-byte sectors.
3697 * @qc: Command on going
3699 * Transfer one or many ATA_SECT_SIZE of data from/to the
3700 * ATA device for the DRQ request.
3703 * Inherited from caller.
3706 static void ata_pio_sectors(struct ata_queued_cmd
*qc
)
3708 if (is_multi_taskfile(&qc
->tf
)) {
3709 /* READ/WRITE MULTIPLE */
3712 WARN_ON(qc
->dev
->multi_count
== 0);
3714 nsect
= min(qc
->nsect
- qc
->cursect
, qc
->dev
->multi_count
);
3722 * atapi_send_cdb - Write CDB bytes to hardware
3723 * @ap: Port to which ATAPI device is attached.
3724 * @qc: Taskfile currently active
3726 * When device has indicated its readiness to accept
3727 * a CDB, this function is called. Send the CDB.
3733 static void atapi_send_cdb(struct ata_port
*ap
, struct ata_queued_cmd
*qc
)
3736 DPRINTK("send cdb\n");
3737 WARN_ON(qc
->dev
->cdb_len
< 12);
3739 ata_data_xfer(ap
, qc
->cdb
, qc
->dev
->cdb_len
, 1);
3740 ata_altstatus(ap
); /* flush */
3742 switch (qc
->tf
.protocol
) {
3743 case ATA_PROT_ATAPI
:
3744 ap
->hsm_task_state
= HSM_ST
;
3746 case ATA_PROT_ATAPI_NODATA
:
3747 ap
->hsm_task_state
= HSM_ST_LAST
;
3749 case ATA_PROT_ATAPI_DMA
:
3750 ap
->hsm_task_state
= HSM_ST_LAST
;
3751 /* initiate bmdma */
3752 ap
->ops
->bmdma_start(qc
);
3758 * __atapi_pio_bytes - Transfer data from/to the ATAPI device.
3759 * @qc: Command on going
3760 * @bytes: number of bytes
3762 * Transfer Transfer data from/to the ATAPI device.
3765 * Inherited from caller.
3769 static void __atapi_pio_bytes(struct ata_queued_cmd
*qc
, unsigned int bytes
)
3771 int do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
);
3772 struct scatterlist
*sg
= qc
->__sg
;
3773 struct ata_port
*ap
= qc
->ap
;
3776 unsigned int offset
, count
;
3778 if (qc
->curbytes
+ bytes
>= qc
->nbytes
)
3779 ap
->hsm_task_state
= HSM_ST_LAST
;
3782 if (unlikely(qc
->cursg
>= qc
->n_elem
)) {
3784 * The end of qc->sg is reached and the device expects
3785 * more data to transfer. In order not to overrun qc->sg
3786 * and fulfill length specified in the byte count register,
3787 * - for read case, discard trailing data from the device
3788 * - for write case, padding zero data to the device
3790 u16 pad_buf
[1] = { 0 };
3791 unsigned int words
= bytes
>> 1;
3794 if (words
) /* warning if bytes > 1 */
3795 ata_dev_printk(qc
->dev
, KERN_WARNING
,
3796 "%u bytes trailing data\n", bytes
);
3798 for (i
= 0; i
< words
; i
++)
3799 ata_data_xfer(ap
, (unsigned char*)pad_buf
, 2, do_write
);
3801 ap
->hsm_task_state
= HSM_ST_LAST
;
3805 sg
= &qc
->__sg
[qc
->cursg
];
3808 offset
= sg
->offset
+ qc
->cursg_ofs
;
3810 /* get the current page and offset */
3811 page
= nth_page(page
, (offset
>> PAGE_SHIFT
));
3812 offset
%= PAGE_SIZE
;
3814 /* don't overrun current sg */
3815 count
= min(sg
->length
- qc
->cursg_ofs
, bytes
);
3817 /* don't cross page boundaries */
3818 count
= min(count
, (unsigned int)PAGE_SIZE
- offset
);
3820 DPRINTK("data %s\n", qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
3822 if (PageHighMem(page
)) {
3823 unsigned long flags
;
3825 local_irq_save(flags
);
3826 buf
= kmap_atomic(page
, KM_IRQ0
);
3828 /* do the actual data transfer */
3829 ata_data_xfer(ap
, buf
+ offset
, count
, do_write
);
3831 kunmap_atomic(buf
, KM_IRQ0
);
3832 local_irq_restore(flags
);
3834 buf
= page_address(page
);
3835 ata_data_xfer(ap
, buf
+ offset
, count
, do_write
);
3839 qc
->curbytes
+= count
;
3840 qc
->cursg_ofs
+= count
;
3842 if (qc
->cursg_ofs
== sg
->length
) {
3852 * atapi_pio_bytes - Transfer data from/to the ATAPI device.
3853 * @qc: Command on going
3855 * Transfer Transfer data from/to the ATAPI device.
3858 * Inherited from caller.
3861 static void atapi_pio_bytes(struct ata_queued_cmd
*qc
)
3863 struct ata_port
*ap
= qc
->ap
;
3864 struct ata_device
*dev
= qc
->dev
;
3865 unsigned int ireason
, bc_lo
, bc_hi
, bytes
;
3866 int i_write
, do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
) ? 1 : 0;
3868 ap
->ops
->tf_read(ap
, &qc
->tf
);
3869 ireason
= qc
->tf
.nsect
;
3870 bc_lo
= qc
->tf
.lbam
;
3871 bc_hi
= qc
->tf
.lbah
;
3872 bytes
= (bc_hi
<< 8) | bc_lo
;
3874 /* shall be cleared to zero, indicating xfer of data */
3875 if (ireason
& (1 << 0))
3878 /* make sure transfer direction matches expected */
3879 i_write
= ((ireason
& (1 << 1)) == 0) ? 1 : 0;
3880 if (do_write
!= i_write
)
3883 VPRINTK("ata%u: xfering %d bytes\n", ap
->id
, bytes
);
3885 __atapi_pio_bytes(qc
, bytes
);
3890 ata_dev_printk(dev
, KERN_INFO
, "ATAPI check failed\n");
3891 qc
->err_mask
|= AC_ERR_HSM
;
3892 ap
->hsm_task_state
= HSM_ST_ERR
;
3896 * ata_hsm_ok_in_wq - Check if the qc can be handled in the workqueue.
3897 * @ap: the target ata_port
3901 * 1 if ok in workqueue, 0 otherwise.
3904 static inline int ata_hsm_ok_in_wq(struct ata_port
*ap
, struct ata_queued_cmd
*qc
)
3906 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
3909 if (ap
->hsm_task_state
== HSM_ST_FIRST
) {
3910 if (qc
->tf
.protocol
== ATA_PROT_PIO
&&
3911 (qc
->tf
.flags
& ATA_TFLAG_WRITE
))
3914 if (is_atapi_taskfile(&qc
->tf
) &&
3915 !(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
))
3923 * ata_hsm_qc_complete - finish a qc running on standard HSM
3924 * @qc: Command to complete
3925 * @in_wq: 1 if called from workqueue, 0 otherwise
3927 * Finish @qc which is running on standard HSM.
3930 * If @in_wq is zero, spin_lock_irqsave(host_set lock).
3931 * Otherwise, none on entry and grabs host lock.
3933 static void ata_hsm_qc_complete(struct ata_queued_cmd
*qc
, int in_wq
)
3935 struct ata_port
*ap
= qc
->ap
;
3936 unsigned long flags
;
3938 if (ap
->ops
->error_handler
) {
3940 spin_lock_irqsave(&ap
->host_set
->lock
, flags
);
3942 /* EH might have kicked in while host_set lock
3945 qc
= ata_qc_from_tag(ap
, qc
->tag
);
3947 if (likely(!(qc
->err_mask
& AC_ERR_HSM
))) {
3949 ata_qc_complete(qc
);
3951 ata_port_freeze(ap
);
3954 spin_unlock_irqrestore(&ap
->host_set
->lock
, flags
);
3956 if (likely(!(qc
->err_mask
& AC_ERR_HSM
)))
3957 ata_qc_complete(qc
);
3959 ata_port_freeze(ap
);
3963 spin_lock_irqsave(&ap
->host_set
->lock
, flags
);
3965 ata_qc_complete(qc
);
3966 spin_unlock_irqrestore(&ap
->host_set
->lock
, flags
);
3968 ata_qc_complete(qc
);
3973 * ata_hsm_move - move the HSM to the next state.
3974 * @ap: the target ata_port
3976 * @status: current device status
3977 * @in_wq: 1 if called from workqueue, 0 otherwise
3980 * 1 when poll next status needed, 0 otherwise.
3983 static int ata_hsm_move(struct ata_port
*ap
, struct ata_queued_cmd
*qc
,
3984 u8 status
, int in_wq
)
3986 unsigned long flags
= 0;
3989 WARN_ON((qc
->flags
& ATA_QCFLAG_ACTIVE
) == 0);
3991 /* Make sure ata_qc_issue_prot() does not throw things
3992 * like DMA polling into the workqueue. Notice that
3993 * in_wq is not equivalent to (qc->tf.flags & ATA_TFLAG_POLLING).
3995 WARN_ON(in_wq
!= ata_hsm_ok_in_wq(ap
, qc
));
3998 DPRINTK("ata%u: protocol %d task_state %d (dev_stat 0x%X)\n",
3999 ap
->id
, qc
->tf
.protocol
, ap
->hsm_task_state
, status
);
4001 switch (ap
->hsm_task_state
) {
4003 /* Send first data block or PACKET CDB */
4005 /* If polling, we will stay in the work queue after
4006 * sending the data. Otherwise, interrupt handler
4007 * takes over after sending the data.
4009 poll_next
= (qc
->tf
.flags
& ATA_TFLAG_POLLING
);
4011 /* check device status */
4012 if (unlikely((status
& ATA_DRQ
) == 0)) {
4013 /* handle BSY=0, DRQ=0 as error */
4014 if (likely(status
& (ATA_ERR
| ATA_DF
)))
4015 /* device stops HSM for abort/error */
4016 qc
->err_mask
|= AC_ERR_DEV
;
4018 /* HSM violation. Let EH handle this */
4019 qc
->err_mask
|= AC_ERR_HSM
;
4021 ap
->hsm_task_state
= HSM_ST_ERR
;
4025 /* Device should not ask for data transfer (DRQ=1)
4026 * when it finds something wrong.
4027 * We ignore DRQ here and stop the HSM by
4028 * changing hsm_task_state to HSM_ST_ERR and
4029 * let the EH abort the command or reset the device.
4031 if (unlikely(status
& (ATA_ERR
| ATA_DF
))) {
4032 printk(KERN_WARNING
"ata%d: DRQ=1 with device error, dev_stat 0x%X\n",
4034 qc
->err_mask
|= AC_ERR_HSM
;
4035 ap
->hsm_task_state
= HSM_ST_ERR
;
4039 /* Send the CDB (atapi) or the first data block (ata pio out).
4040 * During the state transition, interrupt handler shouldn't
4041 * be invoked before the data transfer is complete and
4042 * hsm_task_state is changed. Hence, the following locking.
4045 spin_lock_irqsave(&ap
->host_set
->lock
, flags
);
4047 if (qc
->tf
.protocol
== ATA_PROT_PIO
) {
4048 /* PIO data out protocol.
4049 * send first data block.
4052 /* ata_pio_sectors() might change the state
4053 * to HSM_ST_LAST. so, the state is changed here
4054 * before ata_pio_sectors().
4056 ap
->hsm_task_state
= HSM_ST
;
4057 ata_pio_sectors(qc
);
4058 ata_altstatus(ap
); /* flush */
4061 atapi_send_cdb(ap
, qc
);
4064 spin_unlock_irqrestore(&ap
->host_set
->lock
, flags
);
4066 /* if polling, ata_pio_task() handles the rest.
4067 * otherwise, interrupt handler takes over from here.
4072 /* complete command or read/write the data register */
4073 if (qc
->tf
.protocol
== ATA_PROT_ATAPI
) {
4074 /* ATAPI PIO protocol */
4075 if ((status
& ATA_DRQ
) == 0) {
4076 /* No more data to transfer or device error.
4077 * Device error will be tagged in HSM_ST_LAST.
4079 ap
->hsm_task_state
= HSM_ST_LAST
;
4083 /* Device should not ask for data transfer (DRQ=1)
4084 * when it finds something wrong.
4085 * We ignore DRQ here and stop the HSM by
4086 * changing hsm_task_state to HSM_ST_ERR and
4087 * let the EH abort the command or reset the device.
4089 if (unlikely(status
& (ATA_ERR
| ATA_DF
))) {
4090 printk(KERN_WARNING
"ata%d: DRQ=1 with device error, dev_stat 0x%X\n",
4092 qc
->err_mask
|= AC_ERR_HSM
;
4093 ap
->hsm_task_state
= HSM_ST_ERR
;
4097 atapi_pio_bytes(qc
);
4099 if (unlikely(ap
->hsm_task_state
== HSM_ST_ERR
))
4100 /* bad ireason reported by device */
4104 /* ATA PIO protocol */
4105 if (unlikely((status
& ATA_DRQ
) == 0)) {
4106 /* handle BSY=0, DRQ=0 as error */
4107 if (likely(status
& (ATA_ERR
| ATA_DF
)))
4108 /* device stops HSM for abort/error */
4109 qc
->err_mask
|= AC_ERR_DEV
;
4111 /* HSM violation. Let EH handle this */
4112 qc
->err_mask
|= AC_ERR_HSM
;
4114 ap
->hsm_task_state
= HSM_ST_ERR
;
4118 /* For PIO reads, some devices may ask for
4119 * data transfer (DRQ=1) alone with ERR=1.
4120 * We respect DRQ here and transfer one
4121 * block of junk data before changing the
4122 * hsm_task_state to HSM_ST_ERR.
4124 * For PIO writes, ERR=1 DRQ=1 doesn't make
4125 * sense since the data block has been
4126 * transferred to the device.
4128 if (unlikely(status
& (ATA_ERR
| ATA_DF
))) {
4129 /* data might be corrputed */
4130 qc
->err_mask
|= AC_ERR_DEV
;
4132 if (!(qc
->tf
.flags
& ATA_TFLAG_WRITE
)) {
4133 ata_pio_sectors(qc
);
4135 status
= ata_wait_idle(ap
);
4138 if (status
& (ATA_BUSY
| ATA_DRQ
))
4139 qc
->err_mask
|= AC_ERR_HSM
;
4141 /* ata_pio_sectors() might change the
4142 * state to HSM_ST_LAST. so, the state
4143 * is changed after ata_pio_sectors().
4145 ap
->hsm_task_state
= HSM_ST_ERR
;
4149 ata_pio_sectors(qc
);
4151 if (ap
->hsm_task_state
== HSM_ST_LAST
&&
4152 (!(qc
->tf
.flags
& ATA_TFLAG_WRITE
))) {
4155 status
= ata_wait_idle(ap
);
4160 ata_altstatus(ap
); /* flush */
4165 if (unlikely(!ata_ok(status
))) {
4166 qc
->err_mask
|= __ac_err_mask(status
);
4167 ap
->hsm_task_state
= HSM_ST_ERR
;
4171 /* no more data to transfer */
4172 DPRINTK("ata%u: dev %u command complete, drv_stat 0x%x\n",
4173 ap
->id
, qc
->dev
->devno
, status
);
4175 WARN_ON(qc
->err_mask
);
4177 ap
->hsm_task_state
= HSM_ST_IDLE
;
4179 /* complete taskfile transaction */
4180 ata_hsm_qc_complete(qc
, in_wq
);
4186 /* make sure qc->err_mask is available to
4187 * know what's wrong and recover
4189 WARN_ON(qc
->err_mask
== 0);
4191 ap
->hsm_task_state
= HSM_ST_IDLE
;
4193 /* complete taskfile transaction */
4194 ata_hsm_qc_complete(qc
, in_wq
);
4206 static void ata_pio_task(void *_data
)
4208 struct ata_queued_cmd
*qc
= _data
;
4209 struct ata_port
*ap
= qc
->ap
;
4214 WARN_ON(ap
->hsm_task_state
== HSM_ST_IDLE
);
4217 * This is purely heuristic. This is a fast path.
4218 * Sometimes when we enter, BSY will be cleared in
4219 * a chk-status or two. If not, the drive is probably seeking
4220 * or something. Snooze for a couple msecs, then
4221 * chk-status again. If still busy, queue delayed work.
4223 status
= ata_busy_wait(ap
, ATA_BUSY
, 5);
4224 if (status
& ATA_BUSY
) {
4226 status
= ata_busy_wait(ap
, ATA_BUSY
, 10);
4227 if (status
& ATA_BUSY
) {
4228 ata_port_queue_task(ap
, ata_pio_task
, qc
, ATA_SHORT_PAUSE
);
4234 poll_next
= ata_hsm_move(ap
, qc
, status
, 1);
4236 /* another command or interrupt handler
4237 * may be running at this point.
4244 * ata_qc_new - Request an available ATA command, for queueing
4245 * @ap: Port associated with device @dev
4246 * @dev: Device from whom we request an available command structure
4252 static struct ata_queued_cmd
*ata_qc_new(struct ata_port
*ap
)
4254 struct ata_queued_cmd
*qc
= NULL
;
4257 /* no command while frozen */
4258 if (unlikely(ap
->flags
& ATA_FLAG_FROZEN
))
4261 /* the last tag is reserved for internal command. */
4262 for (i
= 0; i
< ATA_MAX_QUEUE
- 1; i
++)
4263 if (!test_and_set_bit(i
, &ap
->qc_allocated
)) {
4264 qc
= __ata_qc_from_tag(ap
, i
);
4275 * ata_qc_new_init - Request an available ATA command, and initialize it
4276 * @dev: Device from whom we request an available command structure
4282 struct ata_queued_cmd
*ata_qc_new_init(struct ata_device
*dev
)
4284 struct ata_port
*ap
= dev
->ap
;
4285 struct ata_queued_cmd
*qc
;
4287 qc
= ata_qc_new(ap
);
4300 * ata_qc_free - free unused ata_queued_cmd
4301 * @qc: Command to complete
4303 * Designed to free unused ata_queued_cmd object
4304 * in case something prevents using it.
4307 * spin_lock_irqsave(host_set lock)
4309 void ata_qc_free(struct ata_queued_cmd
*qc
)
4311 struct ata_port
*ap
= qc
->ap
;
4314 WARN_ON(qc
== NULL
); /* ata_qc_from_tag _might_ return NULL */
4318 if (likely(ata_tag_valid(tag
))) {
4319 qc
->tag
= ATA_TAG_POISON
;
4320 clear_bit(tag
, &ap
->qc_allocated
);
4324 void __ata_qc_complete(struct ata_queued_cmd
*qc
)
4326 struct ata_port
*ap
= qc
->ap
;
4328 WARN_ON(qc
== NULL
); /* ata_qc_from_tag _might_ return NULL */
4329 WARN_ON(!(qc
->flags
& ATA_QCFLAG_ACTIVE
));
4331 if (likely(qc
->flags
& ATA_QCFLAG_DMAMAP
))
4334 /* command should be marked inactive atomically with qc completion */
4335 if (qc
->tf
.protocol
== ATA_PROT_NCQ
)
4336 ap
->sactive
&= ~(1 << qc
->tag
);
4338 ap
->active_tag
= ATA_TAG_POISON
;
4340 /* atapi: mark qc as inactive to prevent the interrupt handler
4341 * from completing the command twice later, before the error handler
4342 * is called. (when rc != 0 and atapi request sense is needed)
4344 qc
->flags
&= ~ATA_QCFLAG_ACTIVE
;
4345 ap
->qc_active
&= ~(1 << qc
->tag
);
4347 /* call completion callback */
4348 qc
->complete_fn(qc
);
4352 * ata_qc_complete - Complete an active ATA command
4353 * @qc: Command to complete
4354 * @err_mask: ATA Status register contents
4356 * Indicate to the mid and upper layers that an ATA
4357 * command has completed, with either an ok or not-ok status.
4360 * spin_lock_irqsave(host_set lock)
4362 void ata_qc_complete(struct ata_queued_cmd
*qc
)
4364 struct ata_port
*ap
= qc
->ap
;
4366 /* XXX: New EH and old EH use different mechanisms to
4367 * synchronize EH with regular execution path.
4369 * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED.
4370 * Normal execution path is responsible for not accessing a
4371 * failed qc. libata core enforces the rule by returning NULL
4372 * from ata_qc_from_tag() for failed qcs.
4374 * Old EH depends on ata_qc_complete() nullifying completion
4375 * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does
4376 * not synchronize with interrupt handler. Only PIO task is
4379 if (ap
->ops
->error_handler
) {
4380 WARN_ON(ap
->flags
& ATA_FLAG_FROZEN
);
4382 if (unlikely(qc
->err_mask
))
4383 qc
->flags
|= ATA_QCFLAG_FAILED
;
4385 if (unlikely(qc
->flags
& ATA_QCFLAG_FAILED
)) {
4386 if (!ata_tag_internal(qc
->tag
)) {
4387 /* always fill result TF for failed qc */
4388 ap
->ops
->tf_read(ap
, &qc
->result_tf
);
4389 ata_qc_schedule_eh(qc
);
4394 /* read result TF if requested */
4395 if (qc
->flags
& ATA_QCFLAG_RESULT_TF
)
4396 ap
->ops
->tf_read(ap
, &qc
->result_tf
);
4398 __ata_qc_complete(qc
);
4400 if (qc
->flags
& ATA_QCFLAG_EH_SCHEDULED
)
4403 /* read result TF if failed or requested */
4404 if (qc
->err_mask
|| qc
->flags
& ATA_QCFLAG_RESULT_TF
)
4405 ap
->ops
->tf_read(ap
, &qc
->result_tf
);
4407 __ata_qc_complete(qc
);
4412 * ata_qc_complete_multiple - Complete multiple qcs successfully
4413 * @ap: port in question
4414 * @qc_active: new qc_active mask
4415 * @finish_qc: LLDD callback invoked before completing a qc
4417 * Complete in-flight commands. This functions is meant to be
4418 * called from low-level driver's interrupt routine to complete
4419 * requests normally. ap->qc_active and @qc_active is compared
4420 * and commands are completed accordingly.
4423 * spin_lock_irqsave(host_set lock)
4426 * Number of completed commands on success, -errno otherwise.
4428 int ata_qc_complete_multiple(struct ata_port
*ap
, u32 qc_active
,
4429 void (*finish_qc
)(struct ata_queued_cmd
*))
4435 done_mask
= ap
->qc_active
^ qc_active
;
4437 if (unlikely(done_mask
& qc_active
)) {
4438 ata_port_printk(ap
, KERN_ERR
, "illegal qc_active transition "
4439 "(%08x->%08x)\n", ap
->qc_active
, qc_active
);
4443 for (i
= 0; i
< ATA_MAX_QUEUE
; i
++) {
4444 struct ata_queued_cmd
*qc
;
4446 if (!(done_mask
& (1 << i
)))
4449 if ((qc
= ata_qc_from_tag(ap
, i
))) {
4452 ata_qc_complete(qc
);
4460 static inline int ata_should_dma_map(struct ata_queued_cmd
*qc
)
4462 struct ata_port
*ap
= qc
->ap
;
4464 switch (qc
->tf
.protocol
) {
4467 case ATA_PROT_ATAPI_DMA
:
4470 case ATA_PROT_ATAPI
:
4472 if (ap
->flags
& ATA_FLAG_PIO_DMA
)
4485 * ata_qc_issue - issue taskfile to device
4486 * @qc: command to issue to device
4488 * Prepare an ATA command to submission to device.
4489 * This includes mapping the data into a DMA-able
4490 * area, filling in the S/G table, and finally
4491 * writing the taskfile to hardware, starting the command.
4494 * spin_lock_irqsave(host_set lock)
4496 void ata_qc_issue(struct ata_queued_cmd
*qc
)
4498 struct ata_port
*ap
= qc
->ap
;
4500 /* Make sure only one non-NCQ command is outstanding. The
4501 * check is skipped for old EH because it reuses active qc to
4502 * request ATAPI sense.
4504 WARN_ON(ap
->ops
->error_handler
&& ata_tag_valid(ap
->active_tag
));
4506 if (qc
->tf
.protocol
== ATA_PROT_NCQ
) {
4507 WARN_ON(ap
->sactive
& (1 << qc
->tag
));
4508 ap
->sactive
|= 1 << qc
->tag
;
4510 WARN_ON(ap
->sactive
);
4511 ap
->active_tag
= qc
->tag
;
4514 qc
->flags
|= ATA_QCFLAG_ACTIVE
;
4515 ap
->qc_active
|= 1 << qc
->tag
;
4517 if (ata_should_dma_map(qc
)) {
4518 if (qc
->flags
& ATA_QCFLAG_SG
) {
4519 if (ata_sg_setup(qc
))
4521 } else if (qc
->flags
& ATA_QCFLAG_SINGLE
) {
4522 if (ata_sg_setup_one(qc
))
4526 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
4529 ap
->ops
->qc_prep(qc
);
4531 qc
->err_mask
|= ap
->ops
->qc_issue(qc
);
4532 if (unlikely(qc
->err_mask
))
4537 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
4538 qc
->err_mask
|= AC_ERR_SYSTEM
;
4540 ata_qc_complete(qc
);
4544 * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner
4545 * @qc: command to issue to device
4547 * Using various libata functions and hooks, this function
4548 * starts an ATA command. ATA commands are grouped into
4549 * classes called "protocols", and issuing each type of protocol
4550 * is slightly different.
4552 * May be used as the qc_issue() entry in ata_port_operations.
4555 * spin_lock_irqsave(host_set lock)
4558 * Zero on success, AC_ERR_* mask on failure
4561 unsigned int ata_qc_issue_prot(struct ata_queued_cmd
*qc
)
4563 struct ata_port
*ap
= qc
->ap
;
4565 /* Use polling pio if the LLD doesn't handle
4566 * interrupt driven pio and atapi CDB interrupt.
4568 if (ap
->flags
& ATA_FLAG_PIO_POLLING
) {
4569 switch (qc
->tf
.protocol
) {
4571 case ATA_PROT_ATAPI
:
4572 case ATA_PROT_ATAPI_NODATA
:
4573 qc
->tf
.flags
|= ATA_TFLAG_POLLING
;
4575 case ATA_PROT_ATAPI_DMA
:
4576 if (qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
)
4577 /* see ata_check_atapi_dma() */
4585 /* select the device */
4586 ata_dev_select(ap
, qc
->dev
->devno
, 1, 0);
4588 /* start the command */
4589 switch (qc
->tf
.protocol
) {
4590 case ATA_PROT_NODATA
:
4591 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
4592 ata_qc_set_polling(qc
);
4594 ata_tf_to_host(ap
, &qc
->tf
);
4595 ap
->hsm_task_state
= HSM_ST_LAST
;
4597 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
4598 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
4603 WARN_ON(qc
->tf
.flags
& ATA_TFLAG_POLLING
);
4605 ap
->ops
->tf_load(ap
, &qc
->tf
); /* load tf registers */
4606 ap
->ops
->bmdma_setup(qc
); /* set up bmdma */
4607 ap
->ops
->bmdma_start(qc
); /* initiate bmdma */
4608 ap
->hsm_task_state
= HSM_ST_LAST
;
4612 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
4613 ata_qc_set_polling(qc
);
4615 ata_tf_to_host(ap
, &qc
->tf
);
4617 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
) {
4618 /* PIO data out protocol */
4619 ap
->hsm_task_state
= HSM_ST_FIRST
;
4620 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
4622 /* always send first data block using
4623 * the ata_pio_task() codepath.
4626 /* PIO data in protocol */
4627 ap
->hsm_task_state
= HSM_ST
;
4629 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
4630 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
4632 /* if polling, ata_pio_task() handles the rest.
4633 * otherwise, interrupt handler takes over from here.
4639 case ATA_PROT_ATAPI
:
4640 case ATA_PROT_ATAPI_NODATA
:
4641 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
4642 ata_qc_set_polling(qc
);
4644 ata_tf_to_host(ap
, &qc
->tf
);
4646 ap
->hsm_task_state
= HSM_ST_FIRST
;
4648 /* send cdb by polling if no cdb interrupt */
4649 if ((!(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
)) ||
4650 (qc
->tf
.flags
& ATA_TFLAG_POLLING
))
4651 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
4654 case ATA_PROT_ATAPI_DMA
:
4655 WARN_ON(qc
->tf
.flags
& ATA_TFLAG_POLLING
);
4657 ap
->ops
->tf_load(ap
, &qc
->tf
); /* load tf registers */
4658 ap
->ops
->bmdma_setup(qc
); /* set up bmdma */
4659 ap
->hsm_task_state
= HSM_ST_FIRST
;
4661 /* send cdb by polling if no cdb interrupt */
4662 if (!(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
))
4663 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
4668 return AC_ERR_SYSTEM
;
4675 * ata_host_intr - Handle host interrupt for given (port, task)
4676 * @ap: Port on which interrupt arrived (possibly...)
4677 * @qc: Taskfile currently active in engine
4679 * Handle host interrupt for given queued command. Currently,
4680 * only DMA interrupts are handled. All other commands are
4681 * handled via polling with interrupts disabled (nIEN bit).
4684 * spin_lock_irqsave(host_set lock)
4687 * One if interrupt was handled, zero if not (shared irq).
4690 inline unsigned int ata_host_intr (struct ata_port
*ap
,
4691 struct ata_queued_cmd
*qc
)
4693 u8 status
, host_stat
= 0;
4695 VPRINTK("ata%u: protocol %d task_state %d\n",
4696 ap
->id
, qc
->tf
.protocol
, ap
->hsm_task_state
);
4698 /* Check whether we are expecting interrupt in this state */
4699 switch (ap
->hsm_task_state
) {
4701 /* Some pre-ATAPI-4 devices assert INTRQ
4702 * at this state when ready to receive CDB.
4705 /* Check the ATA_DFLAG_CDB_INTR flag is enough here.
4706 * The flag was turned on only for atapi devices.
4707 * No need to check is_atapi_taskfile(&qc->tf) again.
4709 if (!(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
))
4713 if (qc
->tf
.protocol
== ATA_PROT_DMA
||
4714 qc
->tf
.protocol
== ATA_PROT_ATAPI_DMA
) {
4715 /* check status of DMA engine */
4716 host_stat
= ap
->ops
->bmdma_status(ap
);
4717 VPRINTK("ata%u: host_stat 0x%X\n", ap
->id
, host_stat
);
4719 /* if it's not our irq... */
4720 if (!(host_stat
& ATA_DMA_INTR
))
4723 /* before we do anything else, clear DMA-Start bit */
4724 ap
->ops
->bmdma_stop(qc
);
4726 if (unlikely(host_stat
& ATA_DMA_ERR
)) {
4727 /* error when transfering data to/from memory */
4728 qc
->err_mask
|= AC_ERR_HOST_BUS
;
4729 ap
->hsm_task_state
= HSM_ST_ERR
;
4739 /* check altstatus */
4740 status
= ata_altstatus(ap
);
4741 if (status
& ATA_BUSY
)
4744 /* check main status, clearing INTRQ */
4745 status
= ata_chk_status(ap
);
4746 if (unlikely(status
& ATA_BUSY
))
4749 /* ack bmdma irq events */
4750 ap
->ops
->irq_clear(ap
);
4752 ata_hsm_move(ap
, qc
, status
, 0);
4753 return 1; /* irq handled */
4756 ap
->stats
.idle_irq
++;
4759 if ((ap
->stats
.idle_irq
% 1000) == 0) {
4760 ata_irq_ack(ap
, 0); /* debug trap */
4761 ata_port_printk(ap
, KERN_WARNING
, "irq trap\n");
4765 return 0; /* irq not handled */
4769 * ata_interrupt - Default ATA host interrupt handler
4770 * @irq: irq line (unused)
4771 * @dev_instance: pointer to our ata_host_set information structure
4774 * Default interrupt handler for PCI IDE devices. Calls
4775 * ata_host_intr() for each port that is not disabled.
4778 * Obtains host_set lock during operation.
4781 * IRQ_NONE or IRQ_HANDLED.
4784 irqreturn_t
ata_interrupt (int irq
, void *dev_instance
, struct pt_regs
*regs
)
4786 struct ata_host_set
*host_set
= dev_instance
;
4788 unsigned int handled
= 0;
4789 unsigned long flags
;
4791 /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */
4792 spin_lock_irqsave(&host_set
->lock
, flags
);
4794 for (i
= 0; i
< host_set
->n_ports
; i
++) {
4795 struct ata_port
*ap
;
4797 ap
= host_set
->ports
[i
];
4799 !(ap
->flags
& ATA_FLAG_DISABLED
)) {
4800 struct ata_queued_cmd
*qc
;
4802 qc
= ata_qc_from_tag(ap
, ap
->active_tag
);
4803 if (qc
&& (!(qc
->tf
.flags
& ATA_TFLAG_POLLING
)) &&
4804 (qc
->flags
& ATA_QCFLAG_ACTIVE
))
4805 handled
|= ata_host_intr(ap
, qc
);
4809 spin_unlock_irqrestore(&host_set
->lock
, flags
);
4811 return IRQ_RETVAL(handled
);
4815 * sata_scr_valid - test whether SCRs are accessible
4816 * @ap: ATA port to test SCR accessibility for
4818 * Test whether SCRs are accessible for @ap.
4824 * 1 if SCRs are accessible, 0 otherwise.
4826 int sata_scr_valid(struct ata_port
*ap
)
4828 return ap
->cbl
== ATA_CBL_SATA
&& ap
->ops
->scr_read
;
4832 * sata_scr_read - read SCR register of the specified port
4833 * @ap: ATA port to read SCR for
4835 * @val: Place to store read value
4837 * Read SCR register @reg of @ap into *@val. This function is
4838 * guaranteed to succeed if the cable type of the port is SATA
4839 * and the port implements ->scr_read.
4845 * 0 on success, negative errno on failure.
4847 int sata_scr_read(struct ata_port
*ap
, int reg
, u32
*val
)
4849 if (sata_scr_valid(ap
)) {
4850 *val
= ap
->ops
->scr_read(ap
, reg
);
4857 * sata_scr_write - write SCR register of the specified port
4858 * @ap: ATA port to write SCR for
4859 * @reg: SCR to write
4860 * @val: value to write
4862 * Write @val to SCR register @reg of @ap. This function is
4863 * guaranteed to succeed if the cable type of the port is SATA
4864 * and the port implements ->scr_read.
4870 * 0 on success, negative errno on failure.
4872 int sata_scr_write(struct ata_port
*ap
, int reg
, u32 val
)
4874 if (sata_scr_valid(ap
)) {
4875 ap
->ops
->scr_write(ap
, reg
, val
);
4882 * sata_scr_write_flush - write SCR register of the specified port and flush
4883 * @ap: ATA port to write SCR for
4884 * @reg: SCR to write
4885 * @val: value to write
4887 * This function is identical to sata_scr_write() except that this
4888 * function performs flush after writing to the register.
4894 * 0 on success, negative errno on failure.
4896 int sata_scr_write_flush(struct ata_port
*ap
, int reg
, u32 val
)
4898 if (sata_scr_valid(ap
)) {
4899 ap
->ops
->scr_write(ap
, reg
, val
);
4900 ap
->ops
->scr_read(ap
, reg
);
4907 * ata_port_online - test whether the given port is online
4908 * @ap: ATA port to test
4910 * Test whether @ap is online. Note that this function returns 0
4911 * if online status of @ap cannot be obtained, so
4912 * ata_port_online(ap) != !ata_port_offline(ap).
4918 * 1 if the port online status is available and online.
4920 int ata_port_online(struct ata_port
*ap
)
4924 if (!sata_scr_read(ap
, SCR_STATUS
, &sstatus
) && (sstatus
& 0xf) == 0x3)
4930 * ata_port_offline - test whether the given port is offline
4931 * @ap: ATA port to test
4933 * Test whether @ap is offline. Note that this function returns
4934 * 0 if offline status of @ap cannot be obtained, so
4935 * ata_port_online(ap) != !ata_port_offline(ap).
4941 * 1 if the port offline status is available and offline.
4943 int ata_port_offline(struct ata_port
*ap
)
4947 if (!sata_scr_read(ap
, SCR_STATUS
, &sstatus
) && (sstatus
& 0xf) != 0x3)
4953 * Execute a 'simple' command, that only consists of the opcode 'cmd' itself,
4954 * without filling any other registers
4956 static int ata_do_simple_cmd(struct ata_device
*dev
, u8 cmd
)
4958 struct ata_taskfile tf
;
4961 ata_tf_init(dev
, &tf
);
4964 tf
.flags
|= ATA_TFLAG_DEVICE
;
4965 tf
.protocol
= ATA_PROT_NODATA
;
4967 err
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0);
4969 ata_dev_printk(dev
, KERN_ERR
, "%s: ata command failed: %d\n",
4975 static int ata_flush_cache(struct ata_device
*dev
)
4979 if (!ata_try_flush_cache(dev
))
4982 if (ata_id_has_flush_ext(dev
->id
))
4983 cmd
= ATA_CMD_FLUSH_EXT
;
4985 cmd
= ATA_CMD_FLUSH
;
4987 return ata_do_simple_cmd(dev
, cmd
);
4990 static int ata_standby_drive(struct ata_device
*dev
)
4992 return ata_do_simple_cmd(dev
, ATA_CMD_STANDBYNOW1
);
4995 static int ata_start_drive(struct ata_device
*dev
)
4997 return ata_do_simple_cmd(dev
, ATA_CMD_IDLEIMMEDIATE
);
5001 * ata_device_resume - wakeup a previously suspended devices
5002 * @dev: the device to resume
5004 * Kick the drive back into action, by sending it an idle immediate
5005 * command and making sure its transfer mode matches between drive
5009 int ata_device_resume(struct ata_device
*dev
)
5011 struct ata_port
*ap
= dev
->ap
;
5013 if (ap
->flags
& ATA_FLAG_SUSPENDED
) {
5014 struct ata_device
*failed_dev
;
5015 ap
->flags
&= ~ATA_FLAG_SUSPENDED
;
5016 while (ata_set_mode(ap
, &failed_dev
))
5017 ata_dev_disable(failed_dev
);
5019 if (!ata_dev_enabled(dev
))
5021 if (dev
->class == ATA_DEV_ATA
)
5022 ata_start_drive(dev
);
5028 * ata_device_suspend - prepare a device for suspend
5029 * @dev: the device to suspend
5030 * @state: target power management state
5032 * Flush the cache on the drive, if appropriate, then issue a
5033 * standbynow command.
5035 int ata_device_suspend(struct ata_device
*dev
, pm_message_t state
)
5037 struct ata_port
*ap
= dev
->ap
;
5039 if (!ata_dev_enabled(dev
))
5041 if (dev
->class == ATA_DEV_ATA
)
5042 ata_flush_cache(dev
);
5044 if (state
.event
!= PM_EVENT_FREEZE
)
5045 ata_standby_drive(dev
);
5046 ap
->flags
|= ATA_FLAG_SUSPENDED
;
5051 * ata_port_start - Set port up for dma.
5052 * @ap: Port to initialize
5054 * Called just after data structures for each port are
5055 * initialized. Allocates space for PRD table.
5057 * May be used as the port_start() entry in ata_port_operations.
5060 * Inherited from caller.
5063 int ata_port_start (struct ata_port
*ap
)
5065 struct device
*dev
= ap
->dev
;
5068 ap
->prd
= dma_alloc_coherent(dev
, ATA_PRD_TBL_SZ
, &ap
->prd_dma
, GFP_KERNEL
);
5072 rc
= ata_pad_alloc(ap
, dev
);
5074 dma_free_coherent(dev
, ATA_PRD_TBL_SZ
, ap
->prd
, ap
->prd_dma
);
5078 DPRINTK("prd alloc, virt %p, dma %llx\n", ap
->prd
, (unsigned long long) ap
->prd_dma
);
5085 * ata_port_stop - Undo ata_port_start()
5086 * @ap: Port to shut down
5088 * Frees the PRD table.
5090 * May be used as the port_stop() entry in ata_port_operations.
5093 * Inherited from caller.
5096 void ata_port_stop (struct ata_port
*ap
)
5098 struct device
*dev
= ap
->dev
;
5100 dma_free_coherent(dev
, ATA_PRD_TBL_SZ
, ap
->prd
, ap
->prd_dma
);
5101 ata_pad_free(ap
, dev
);
5104 void ata_host_stop (struct ata_host_set
*host_set
)
5106 if (host_set
->mmio_base
)
5107 iounmap(host_set
->mmio_base
);
5112 * ata_host_remove - Unregister SCSI host structure with upper layers
5113 * @ap: Port to unregister
5114 * @do_unregister: 1 if we fully unregister, 0 to just stop the port
5117 * Inherited from caller.
5120 static void ata_host_remove(struct ata_port
*ap
, unsigned int do_unregister
)
5122 struct Scsi_Host
*sh
= ap
->host
;
5127 scsi_remove_host(sh
);
5129 ap
->ops
->port_stop(ap
);
5133 * ata_host_init - Initialize an ata_port structure
5134 * @ap: Structure to initialize
5135 * @host: associated SCSI mid-layer structure
5136 * @host_set: Collection of hosts to which @ap belongs
5137 * @ent: Probe information provided by low-level driver
5138 * @port_no: Port number associated with this ata_port
5140 * Initialize a new ata_port structure, and its associated
5144 * Inherited from caller.
5147 static void ata_host_init(struct ata_port
*ap
, struct Scsi_Host
*host
,
5148 struct ata_host_set
*host_set
,
5149 const struct ata_probe_ent
*ent
, unsigned int port_no
)
5155 host
->max_channel
= 1;
5156 host
->unique_id
= ata_unique_id
++;
5157 host
->max_cmd_len
= 12;
5159 ap
->flags
= ATA_FLAG_DISABLED
;
5160 ap
->id
= host
->unique_id
;
5162 ap
->ctl
= ATA_DEVCTL_OBS
;
5163 ap
->host_set
= host_set
;
5165 ap
->port_no
= port_no
;
5167 ent
->legacy_mode
? ent
->hard_port_no
: port_no
;
5168 ap
->pio_mask
= ent
->pio_mask
;
5169 ap
->mwdma_mask
= ent
->mwdma_mask
;
5170 ap
->udma_mask
= ent
->udma_mask
;
5171 ap
->flags
|= ent
->host_flags
;
5172 ap
->ops
= ent
->port_ops
;
5173 ap
->sata_spd_limit
= UINT_MAX
;
5174 ap
->active_tag
= ATA_TAG_POISON
;
5175 ap
->last_ctl
= 0xFF;
5177 INIT_WORK(&ap
->port_task
, NULL
, NULL
);
5178 INIT_LIST_HEAD(&ap
->eh_done_q
);
5180 /* set cable type */
5181 ap
->cbl
= ATA_CBL_NONE
;
5182 if (ap
->flags
& ATA_FLAG_SATA
)
5183 ap
->cbl
= ATA_CBL_SATA
;
5185 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
5186 struct ata_device
*dev
= &ap
->device
[i
];
5189 dev
->pio_mask
= UINT_MAX
;
5190 dev
->mwdma_mask
= UINT_MAX
;
5191 dev
->udma_mask
= UINT_MAX
;
5195 ap
->stats
.unhandled_irq
= 1;
5196 ap
->stats
.idle_irq
= 1;
5199 memcpy(&ap
->ioaddr
, &ent
->port
[port_no
], sizeof(struct ata_ioports
));
5203 * ata_host_add - Attach low-level ATA driver to system
5204 * @ent: Information provided by low-level driver
5205 * @host_set: Collections of ports to which we add
5206 * @port_no: Port number associated with this host
5208 * Attach low-level ATA driver to system.
5211 * PCI/etc. bus probe sem.
5214 * New ata_port on success, for NULL on error.
5217 static struct ata_port
* ata_host_add(const struct ata_probe_ent
*ent
,
5218 struct ata_host_set
*host_set
,
5219 unsigned int port_no
)
5221 struct Scsi_Host
*host
;
5222 struct ata_port
*ap
;
5227 if (!ent
->port_ops
->probe_reset
&&
5228 !(ent
->host_flags
& (ATA_FLAG_SATA_RESET
| ATA_FLAG_SRST
))) {
5229 printk(KERN_ERR
"ata%u: no reset mechanism available\n",
5234 host
= scsi_host_alloc(ent
->sht
, sizeof(struct ata_port
));
5238 host
->transportt
= &ata_scsi_transport_template
;
5240 ap
= ata_shost_to_port(host
);
5242 ata_host_init(ap
, host
, host_set
, ent
, port_no
);
5244 rc
= ap
->ops
->port_start(ap
);
5251 scsi_host_put(host
);
5256 * ata_device_add - Register hardware device with ATA and SCSI layers
5257 * @ent: Probe information describing hardware device to be registered
5259 * This function processes the information provided in the probe
5260 * information struct @ent, allocates the necessary ATA and SCSI
5261 * host information structures, initializes them, and registers
5262 * everything with requisite kernel subsystems.
5264 * This function requests irqs, probes the ATA bus, and probes
5268 * PCI/etc. bus probe sem.
5271 * Number of ports registered. Zero on error (no ports registered).
5274 int ata_device_add(const struct ata_probe_ent
*ent
)
5276 unsigned int count
= 0, i
;
5277 struct device
*dev
= ent
->dev
;
5278 struct ata_host_set
*host_set
;
5281 /* alloc a container for our list of ATA ports (buses) */
5282 host_set
= kzalloc(sizeof(struct ata_host_set
) +
5283 (ent
->n_ports
* sizeof(void *)), GFP_KERNEL
);
5286 spin_lock_init(&host_set
->lock
);
5288 host_set
->dev
= dev
;
5289 host_set
->n_ports
= ent
->n_ports
;
5290 host_set
->irq
= ent
->irq
;
5291 host_set
->mmio_base
= ent
->mmio_base
;
5292 host_set
->private_data
= ent
->private_data
;
5293 host_set
->ops
= ent
->port_ops
;
5294 host_set
->flags
= ent
->host_set_flags
;
5296 /* register each port bound to this device */
5297 for (i
= 0; i
< ent
->n_ports
; i
++) {
5298 struct ata_port
*ap
;
5299 unsigned long xfer_mode_mask
;
5301 ap
= ata_host_add(ent
, host_set
, i
);
5305 host_set
->ports
[i
] = ap
;
5306 xfer_mode_mask
=(ap
->udma_mask
<< ATA_SHIFT_UDMA
) |
5307 (ap
->mwdma_mask
<< ATA_SHIFT_MWDMA
) |
5308 (ap
->pio_mask
<< ATA_SHIFT_PIO
);
5310 /* print per-port info to dmesg */
5311 ata_port_printk(ap
, KERN_INFO
, "%cATA max %s cmd 0x%lX "
5312 "ctl 0x%lX bmdma 0x%lX irq %lu\n",
5313 ap
->flags
& ATA_FLAG_SATA
? 'S' : 'P',
5314 ata_mode_string(xfer_mode_mask
),
5315 ap
->ioaddr
.cmd_addr
,
5316 ap
->ioaddr
.ctl_addr
,
5317 ap
->ioaddr
.bmdma_addr
,
5321 host_set
->ops
->irq_clear(ap
);
5322 ata_eh_freeze_port(ap
); /* freeze port before requesting IRQ */
5329 /* obtain irq, that is shared between channels */
5330 if (request_irq(ent
->irq
, ent
->port_ops
->irq_handler
, ent
->irq_flags
,
5331 DRV_NAME
, host_set
))
5334 /* perform each probe synchronously */
5335 DPRINTK("probe begin\n");
5336 for (i
= 0; i
< count
; i
++) {
5337 struct ata_port
*ap
;
5340 ap
= host_set
->ports
[i
];
5342 DPRINTK("ata%u: bus probe begin\n", ap
->id
);
5343 rc
= ata_bus_probe(ap
);
5344 DPRINTK("ata%u: bus probe end\n", ap
->id
);
5347 /* FIXME: do something useful here?
5348 * Current libata behavior will
5349 * tear down everything when
5350 * the module is removed
5351 * or the h/w is unplugged.
5355 rc
= scsi_add_host(ap
->host
, dev
);
5357 ata_port_printk(ap
, KERN_ERR
, "scsi_add_host failed\n");
5358 /* FIXME: do something useful here */
5359 /* FIXME: handle unconditional calls to
5360 * scsi_scan_host and ata_host_remove, below,
5366 /* probes are done, now scan each port's disk(s) */
5367 DPRINTK("host probe begin\n");
5368 for (i
= 0; i
< count
; i
++) {
5369 struct ata_port
*ap
= host_set
->ports
[i
];
5371 ata_scsi_scan_host(ap
);
5374 dev_set_drvdata(dev
, host_set
);
5376 VPRINTK("EXIT, returning %u\n", ent
->n_ports
);
5377 return ent
->n_ports
; /* success */
5380 for (i
= 0; i
< count
; i
++) {
5381 ata_host_remove(host_set
->ports
[i
], 1);
5382 scsi_host_put(host_set
->ports
[i
]->host
);
5386 VPRINTK("EXIT, returning 0\n");
5391 * ata_host_set_remove - PCI layer callback for device removal
5392 * @host_set: ATA host set that was removed
5394 * Unregister all objects associated with this host set. Free those
5398 * Inherited from calling layer (may sleep).
5401 void ata_host_set_remove(struct ata_host_set
*host_set
)
5403 struct ata_port
*ap
;
5406 for (i
= 0; i
< host_set
->n_ports
; i
++) {
5407 ap
= host_set
->ports
[i
];
5408 scsi_remove_host(ap
->host
);
5411 free_irq(host_set
->irq
, host_set
);
5413 for (i
= 0; i
< host_set
->n_ports
; i
++) {
5414 ap
= host_set
->ports
[i
];
5416 ata_scsi_release(ap
->host
);
5418 if ((ap
->flags
& ATA_FLAG_NO_LEGACY
) == 0) {
5419 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
5421 if (ioaddr
->cmd_addr
== 0x1f0)
5422 release_region(0x1f0, 8);
5423 else if (ioaddr
->cmd_addr
== 0x170)
5424 release_region(0x170, 8);
5427 scsi_host_put(ap
->host
);
5430 if (host_set
->ops
->host_stop
)
5431 host_set
->ops
->host_stop(host_set
);
5437 * ata_scsi_release - SCSI layer callback hook for host unload
5438 * @host: libata host to be unloaded
5440 * Performs all duties necessary to shut down a libata port...
5441 * Kill port kthread, disable port, and release resources.
5444 * Inherited from SCSI layer.
5450 int ata_scsi_release(struct Scsi_Host
*host
)
5452 struct ata_port
*ap
= ata_shost_to_port(host
);
5456 ap
->ops
->port_disable(ap
);
5457 ata_host_remove(ap
, 0);
5464 * ata_std_ports - initialize ioaddr with standard port offsets.
5465 * @ioaddr: IO address structure to be initialized
5467 * Utility function which initializes data_addr, error_addr,
5468 * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr,
5469 * device_addr, status_addr, and command_addr to standard offsets
5470 * relative to cmd_addr.
5472 * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr.
5475 void ata_std_ports(struct ata_ioports
*ioaddr
)
5477 ioaddr
->data_addr
= ioaddr
->cmd_addr
+ ATA_REG_DATA
;
5478 ioaddr
->error_addr
= ioaddr
->cmd_addr
+ ATA_REG_ERR
;
5479 ioaddr
->feature_addr
= ioaddr
->cmd_addr
+ ATA_REG_FEATURE
;
5480 ioaddr
->nsect_addr
= ioaddr
->cmd_addr
+ ATA_REG_NSECT
;
5481 ioaddr
->lbal_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAL
;
5482 ioaddr
->lbam_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAM
;
5483 ioaddr
->lbah_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAH
;
5484 ioaddr
->device_addr
= ioaddr
->cmd_addr
+ ATA_REG_DEVICE
;
5485 ioaddr
->status_addr
= ioaddr
->cmd_addr
+ ATA_REG_STATUS
;
5486 ioaddr
->command_addr
= ioaddr
->cmd_addr
+ ATA_REG_CMD
;
5492 void ata_pci_host_stop (struct ata_host_set
*host_set
)
5494 struct pci_dev
*pdev
= to_pci_dev(host_set
->dev
);
5496 pci_iounmap(pdev
, host_set
->mmio_base
);
5500 * ata_pci_remove_one - PCI layer callback for device removal
5501 * @pdev: PCI device that was removed
5503 * PCI layer indicates to libata via this hook that
5504 * hot-unplug or module unload event has occurred.
5505 * Handle this by unregistering all objects associated
5506 * with this PCI device. Free those objects. Then finally
5507 * release PCI resources and disable device.
5510 * Inherited from PCI layer (may sleep).
5513 void ata_pci_remove_one (struct pci_dev
*pdev
)
5515 struct device
*dev
= pci_dev_to_dev(pdev
);
5516 struct ata_host_set
*host_set
= dev_get_drvdata(dev
);
5518 ata_host_set_remove(host_set
);
5519 pci_release_regions(pdev
);
5520 pci_disable_device(pdev
);
5521 dev_set_drvdata(dev
, NULL
);
5524 /* move to PCI subsystem */
5525 int pci_test_config_bits(struct pci_dev
*pdev
, const struct pci_bits
*bits
)
5527 unsigned long tmp
= 0;
5529 switch (bits
->width
) {
5532 pci_read_config_byte(pdev
, bits
->reg
, &tmp8
);
5538 pci_read_config_word(pdev
, bits
->reg
, &tmp16
);
5544 pci_read_config_dword(pdev
, bits
->reg
, &tmp32
);
5555 return (tmp
== bits
->val
) ? 1 : 0;
5558 int ata_pci_device_suspend(struct pci_dev
*pdev
, pm_message_t state
)
5560 pci_save_state(pdev
);
5561 pci_disable_device(pdev
);
5562 pci_set_power_state(pdev
, PCI_D3hot
);
5566 int ata_pci_device_resume(struct pci_dev
*pdev
)
5568 pci_set_power_state(pdev
, PCI_D0
);
5569 pci_restore_state(pdev
);
5570 pci_enable_device(pdev
);
5571 pci_set_master(pdev
);
5574 #endif /* CONFIG_PCI */
5577 static int __init
ata_init(void)
5579 ata_wq
= create_workqueue("ata");
5583 printk(KERN_DEBUG
"libata version " DRV_VERSION
" loaded.\n");
5587 static void __exit
ata_exit(void)
5589 destroy_workqueue(ata_wq
);
5592 module_init(ata_init
);
5593 module_exit(ata_exit
);
5595 static unsigned long ratelimit_time
;
5596 static spinlock_t ata_ratelimit_lock
= SPIN_LOCK_UNLOCKED
;
5598 int ata_ratelimit(void)
5601 unsigned long flags
;
5603 spin_lock_irqsave(&ata_ratelimit_lock
, flags
);
5605 if (time_after(jiffies
, ratelimit_time
)) {
5607 ratelimit_time
= jiffies
+ (HZ
/5);
5611 spin_unlock_irqrestore(&ata_ratelimit_lock
, flags
);
5617 * ata_wait_register - wait until register value changes
5618 * @reg: IO-mapped register
5619 * @mask: Mask to apply to read register value
5620 * @val: Wait condition
5621 * @interval_msec: polling interval in milliseconds
5622 * @timeout_msec: timeout in milliseconds
5624 * Waiting for some bits of register to change is a common
5625 * operation for ATA controllers. This function reads 32bit LE
5626 * IO-mapped register @reg and tests for the following condition.
5628 * (*@reg & mask) != val
5630 * If the condition is met, it returns; otherwise, the process is
5631 * repeated after @interval_msec until timeout.
5634 * Kernel thread context (may sleep)
5637 * The final register value.
5639 u32
ata_wait_register(void __iomem
*reg
, u32 mask
, u32 val
,
5640 unsigned long interval_msec
,
5641 unsigned long timeout_msec
)
5643 unsigned long timeout
;
5646 tmp
= ioread32(reg
);
5648 /* Calculate timeout _after_ the first read to make sure
5649 * preceding writes reach the controller before starting to
5650 * eat away the timeout.
5652 timeout
= jiffies
+ (timeout_msec
* HZ
) / 1000;
5654 while ((tmp
& mask
) == val
&& time_before(jiffies
, timeout
)) {
5655 msleep(interval_msec
);
5656 tmp
= ioread32(reg
);
5663 * libata is essentially a library of internal helper functions for
5664 * low-level ATA host controller drivers. As such, the API/ABI is
5665 * likely to change as new drivers are added and updated.
5666 * Do not depend on ABI/API stability.
5669 EXPORT_SYMBOL_GPL(ata_std_bios_param
);
5670 EXPORT_SYMBOL_GPL(ata_std_ports
);
5671 EXPORT_SYMBOL_GPL(ata_device_add
);
5672 EXPORT_SYMBOL_GPL(ata_host_set_remove
);
5673 EXPORT_SYMBOL_GPL(ata_sg_init
);
5674 EXPORT_SYMBOL_GPL(ata_sg_init_one
);
5675 EXPORT_SYMBOL_GPL(ata_qc_complete
);
5676 EXPORT_SYMBOL_GPL(ata_qc_complete_multiple
);
5677 EXPORT_SYMBOL_GPL(ata_qc_issue_prot
);
5678 EXPORT_SYMBOL_GPL(ata_tf_load
);
5679 EXPORT_SYMBOL_GPL(ata_tf_read
);
5680 EXPORT_SYMBOL_GPL(ata_noop_dev_select
);
5681 EXPORT_SYMBOL_GPL(ata_std_dev_select
);
5682 EXPORT_SYMBOL_GPL(ata_tf_to_fis
);
5683 EXPORT_SYMBOL_GPL(ata_tf_from_fis
);
5684 EXPORT_SYMBOL_GPL(ata_check_status
);
5685 EXPORT_SYMBOL_GPL(ata_altstatus
);
5686 EXPORT_SYMBOL_GPL(ata_exec_command
);
5687 EXPORT_SYMBOL_GPL(ata_port_start
);
5688 EXPORT_SYMBOL_GPL(ata_port_stop
);
5689 EXPORT_SYMBOL_GPL(ata_host_stop
);
5690 EXPORT_SYMBOL_GPL(ata_interrupt
);
5691 EXPORT_SYMBOL_GPL(ata_qc_prep
);
5692 EXPORT_SYMBOL_GPL(ata_noop_qc_prep
);
5693 EXPORT_SYMBOL_GPL(ata_bmdma_setup
);
5694 EXPORT_SYMBOL_GPL(ata_bmdma_start
);
5695 EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear
);
5696 EXPORT_SYMBOL_GPL(ata_bmdma_status
);
5697 EXPORT_SYMBOL_GPL(ata_bmdma_stop
);
5698 EXPORT_SYMBOL_GPL(ata_bmdma_freeze
);
5699 EXPORT_SYMBOL_GPL(ata_bmdma_thaw
);
5700 EXPORT_SYMBOL_GPL(ata_bmdma_drive_eh
);
5701 EXPORT_SYMBOL_GPL(ata_bmdma_error_handler
);
5702 EXPORT_SYMBOL_GPL(ata_bmdma_post_internal_cmd
);
5703 EXPORT_SYMBOL_GPL(ata_port_probe
);
5704 EXPORT_SYMBOL_GPL(sata_set_spd
);
5705 EXPORT_SYMBOL_GPL(sata_phy_reset
);
5706 EXPORT_SYMBOL_GPL(__sata_phy_reset
);
5707 EXPORT_SYMBOL_GPL(ata_bus_reset
);
5708 EXPORT_SYMBOL_GPL(ata_std_probeinit
);
5709 EXPORT_SYMBOL_GPL(ata_std_softreset
);
5710 EXPORT_SYMBOL_GPL(sata_std_hardreset
);
5711 EXPORT_SYMBOL_GPL(ata_std_postreset
);
5712 EXPORT_SYMBOL_GPL(ata_std_probe_reset
);
5713 EXPORT_SYMBOL_GPL(ata_drive_probe_reset
);
5714 EXPORT_SYMBOL_GPL(ata_dev_revalidate
);
5715 EXPORT_SYMBOL_GPL(ata_dev_classify
);
5716 EXPORT_SYMBOL_GPL(ata_dev_pair
);
5717 EXPORT_SYMBOL_GPL(ata_port_disable
);
5718 EXPORT_SYMBOL_GPL(ata_ratelimit
);
5719 EXPORT_SYMBOL_GPL(ata_wait_register
);
5720 EXPORT_SYMBOL_GPL(ata_busy_sleep
);
5721 EXPORT_SYMBOL_GPL(ata_port_queue_task
);
5722 EXPORT_SYMBOL_GPL(ata_scsi_ioctl
);
5723 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd
);
5724 EXPORT_SYMBOL_GPL(ata_scsi_slave_config
);
5725 EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth
);
5726 EXPORT_SYMBOL_GPL(ata_scsi_release
);
5727 EXPORT_SYMBOL_GPL(ata_host_intr
);
5728 EXPORT_SYMBOL_GPL(sata_scr_valid
);
5729 EXPORT_SYMBOL_GPL(sata_scr_read
);
5730 EXPORT_SYMBOL_GPL(sata_scr_write
);
5731 EXPORT_SYMBOL_GPL(sata_scr_write_flush
);
5732 EXPORT_SYMBOL_GPL(ata_port_online
);
5733 EXPORT_SYMBOL_GPL(ata_port_offline
);
5734 EXPORT_SYMBOL_GPL(ata_id_string
);
5735 EXPORT_SYMBOL_GPL(ata_id_c_string
);
5736 EXPORT_SYMBOL_GPL(ata_scsi_simulate
);
5738 EXPORT_SYMBOL_GPL(ata_pio_need_iordy
);
5739 EXPORT_SYMBOL_GPL(ata_timing_compute
);
5740 EXPORT_SYMBOL_GPL(ata_timing_merge
);
5743 EXPORT_SYMBOL_GPL(pci_test_config_bits
);
5744 EXPORT_SYMBOL_GPL(ata_pci_host_stop
);
5745 EXPORT_SYMBOL_GPL(ata_pci_init_native_mode
);
5746 EXPORT_SYMBOL_GPL(ata_pci_init_one
);
5747 EXPORT_SYMBOL_GPL(ata_pci_remove_one
);
5748 EXPORT_SYMBOL_GPL(ata_pci_device_suspend
);
5749 EXPORT_SYMBOL_GPL(ata_pci_device_resume
);
5750 EXPORT_SYMBOL_GPL(ata_pci_default_filter
);
5751 EXPORT_SYMBOL_GPL(ata_pci_clear_simplex
);
5752 #endif /* CONFIG_PCI */
5754 EXPORT_SYMBOL_GPL(ata_device_suspend
);
5755 EXPORT_SYMBOL_GPL(ata_device_resume
);
5756 EXPORT_SYMBOL_GPL(ata_scsi_device_suspend
);
5757 EXPORT_SYMBOL_GPL(ata_scsi_device_resume
);
5759 EXPORT_SYMBOL_GPL(ata_eng_timeout
);
5760 EXPORT_SYMBOL_GPL(ata_port_schedule_eh
);
5761 EXPORT_SYMBOL_GPL(ata_port_abort
);
5762 EXPORT_SYMBOL_GPL(ata_port_freeze
);
5763 EXPORT_SYMBOL_GPL(ata_eh_freeze_port
);
5764 EXPORT_SYMBOL_GPL(ata_eh_thaw_port
);
5765 EXPORT_SYMBOL_GPL(ata_eh_qc_complete
);
5766 EXPORT_SYMBOL_GPL(ata_eh_qc_retry
);
5767 EXPORT_SYMBOL_GPL(ata_do_eh
);