2 * libata-core.c - helper library for ATA
4 * Maintained by: Jeff Garzik <jgarzik@pobox.com>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
8 * Copyright 2003-2004 Red Hat, Inc. All rights reserved.
9 * Copyright 2003-2004 Jeff Garzik
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2, or (at your option)
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; see the file COPYING. If not, write to
24 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
27 * libata documentation is available via 'make {ps|pdf}docs',
28 * as Documentation/DocBook/libata.*
30 * Hardware documentation available from http://www.t13.org/ and
31 * http://www.sata-io.org/
35 #include <linux/config.h>
36 #include <linux/kernel.h>
37 #include <linux/module.h>
38 #include <linux/pci.h>
39 #include <linux/init.h>
40 #include <linux/list.h>
42 #include <linux/highmem.h>
43 #include <linux/spinlock.h>
44 #include <linux/blkdev.h>
45 #include <linux/delay.h>
46 #include <linux/timer.h>
47 #include <linux/interrupt.h>
48 #include <linux/completion.h>
49 #include <linux/suspend.h>
50 #include <linux/workqueue.h>
51 #include <linux/jiffies.h>
52 #include <linux/scatterlist.h>
53 #include <scsi/scsi.h>
54 #include "scsi_priv.h"
55 #include <scsi/scsi_cmnd.h>
56 #include <scsi/scsi_host.h>
57 #include <linux/libata.h>
59 #include <asm/semaphore.h>
60 #include <asm/byteorder.h>
64 static unsigned int ata_dev_init_params(struct ata_port
*ap
,
65 struct ata_device
*dev
);
66 static void ata_set_mode(struct ata_port
*ap
);
67 static unsigned int ata_dev_set_xfermode(struct ata_port
*ap
,
68 struct ata_device
*dev
);
69 static void ata_dev_xfermask(struct ata_port
*ap
, struct ata_device
*dev
);
71 static unsigned int ata_unique_id
= 1;
72 static struct workqueue_struct
*ata_wq
;
74 int atapi_enabled
= 1;
75 module_param(atapi_enabled
, int, 0444);
76 MODULE_PARM_DESC(atapi_enabled
, "Enable discovery of ATAPI devices (0=off, 1=on)");
79 module_param_named(fua
, libata_fua
, int, 0444);
80 MODULE_PARM_DESC(fua
, "FUA support (0=off, 1=on)");
82 MODULE_AUTHOR("Jeff Garzik");
83 MODULE_DESCRIPTION("Library module for ATA devices");
84 MODULE_LICENSE("GPL");
85 MODULE_VERSION(DRV_VERSION
);
89 * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure
90 * @tf: Taskfile to convert
91 * @fis: Buffer into which data will output
92 * @pmp: Port multiplier port
94 * Converts a standard ATA taskfile to a Serial ATA
95 * FIS structure (Register - Host to Device).
98 * Inherited from caller.
101 void ata_tf_to_fis(const struct ata_taskfile
*tf
, u8
*fis
, u8 pmp
)
103 fis
[0] = 0x27; /* Register - Host to Device FIS */
104 fis
[1] = (pmp
& 0xf) | (1 << 7); /* Port multiplier number,
105 bit 7 indicates Command FIS */
106 fis
[2] = tf
->command
;
107 fis
[3] = tf
->feature
;
114 fis
[8] = tf
->hob_lbal
;
115 fis
[9] = tf
->hob_lbam
;
116 fis
[10] = tf
->hob_lbah
;
117 fis
[11] = tf
->hob_feature
;
120 fis
[13] = tf
->hob_nsect
;
131 * ata_tf_from_fis - Convert SATA FIS to ATA taskfile
132 * @fis: Buffer from which data will be input
133 * @tf: Taskfile to output
135 * Converts a serial ATA FIS structure to a standard ATA taskfile.
138 * Inherited from caller.
141 void ata_tf_from_fis(const u8
*fis
, struct ata_taskfile
*tf
)
143 tf
->command
= fis
[2]; /* status */
144 tf
->feature
= fis
[3]; /* error */
151 tf
->hob_lbal
= fis
[8];
152 tf
->hob_lbam
= fis
[9];
153 tf
->hob_lbah
= fis
[10];
156 tf
->hob_nsect
= fis
[13];
159 static const u8 ata_rw_cmds
[] = {
163 ATA_CMD_READ_MULTI_EXT
,
164 ATA_CMD_WRITE_MULTI_EXT
,
168 ATA_CMD_WRITE_MULTI_FUA_EXT
,
172 ATA_CMD_PIO_READ_EXT
,
173 ATA_CMD_PIO_WRITE_EXT
,
186 ATA_CMD_WRITE_FUA_EXT
190 * ata_rwcmd_protocol - set taskfile r/w commands and protocol
191 * @qc: command to examine and configure
193 * Examine the device configuration and tf->flags to calculate
194 * the proper read/write commands and protocol to use.
199 int ata_rwcmd_protocol(struct ata_queued_cmd
*qc
)
201 struct ata_taskfile
*tf
= &qc
->tf
;
202 struct ata_device
*dev
= qc
->dev
;
205 int index
, fua
, lba48
, write
;
207 fua
= (tf
->flags
& ATA_TFLAG_FUA
) ? 4 : 0;
208 lba48
= (tf
->flags
& ATA_TFLAG_LBA48
) ? 2 : 0;
209 write
= (tf
->flags
& ATA_TFLAG_WRITE
) ? 1 : 0;
211 if (dev
->flags
& ATA_DFLAG_PIO
) {
212 tf
->protocol
= ATA_PROT_PIO
;
213 index
= dev
->multi_count
? 0 : 8;
214 } else if (lba48
&& (qc
->ap
->flags
& ATA_FLAG_PIO_LBA48
)) {
215 /* Unable to use DMA due to host limitation */
216 tf
->protocol
= ATA_PROT_PIO
;
217 index
= dev
->multi_count
? 0 : 8;
219 tf
->protocol
= ATA_PROT_DMA
;
223 cmd
= ata_rw_cmds
[index
+ fua
+ lba48
+ write
];
232 * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask
233 * @pio_mask: pio_mask
234 * @mwdma_mask: mwdma_mask
235 * @udma_mask: udma_mask
237 * Pack @pio_mask, @mwdma_mask and @udma_mask into a single
238 * unsigned int xfer_mask.
246 static unsigned int ata_pack_xfermask(unsigned int pio_mask
,
247 unsigned int mwdma_mask
,
248 unsigned int udma_mask
)
250 return ((pio_mask
<< ATA_SHIFT_PIO
) & ATA_MASK_PIO
) |
251 ((mwdma_mask
<< ATA_SHIFT_MWDMA
) & ATA_MASK_MWDMA
) |
252 ((udma_mask
<< ATA_SHIFT_UDMA
) & ATA_MASK_UDMA
);
256 * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks
257 * @xfer_mask: xfer_mask to unpack
258 * @pio_mask: resulting pio_mask
259 * @mwdma_mask: resulting mwdma_mask
260 * @udma_mask: resulting udma_mask
262 * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask.
263 * Any NULL distination masks will be ignored.
265 static void ata_unpack_xfermask(unsigned int xfer_mask
,
266 unsigned int *pio_mask
,
267 unsigned int *mwdma_mask
,
268 unsigned int *udma_mask
)
271 *pio_mask
= (xfer_mask
& ATA_MASK_PIO
) >> ATA_SHIFT_PIO
;
273 *mwdma_mask
= (xfer_mask
& ATA_MASK_MWDMA
) >> ATA_SHIFT_MWDMA
;
275 *udma_mask
= (xfer_mask
& ATA_MASK_UDMA
) >> ATA_SHIFT_UDMA
;
278 static const struct ata_xfer_ent
{
279 unsigned int shift
, bits
;
282 { ATA_SHIFT_PIO
, ATA_BITS_PIO
, XFER_PIO_0
},
283 { ATA_SHIFT_MWDMA
, ATA_BITS_MWDMA
, XFER_MW_DMA_0
},
284 { ATA_SHIFT_UDMA
, ATA_BITS_UDMA
, XFER_UDMA_0
},
289 * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask
290 * @xfer_mask: xfer_mask of interest
292 * Return matching XFER_* value for @xfer_mask. Only the highest
293 * bit of @xfer_mask is considered.
299 * Matching XFER_* value, 0 if no match found.
301 static u8
ata_xfer_mask2mode(unsigned int xfer_mask
)
303 int highbit
= fls(xfer_mask
) - 1;
304 const struct ata_xfer_ent
*ent
;
306 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
307 if (highbit
>= ent
->shift
&& highbit
< ent
->shift
+ ent
->bits
)
308 return ent
->base
+ highbit
- ent
->shift
;
313 * ata_xfer_mode2mask - Find matching xfer_mask for XFER_*
314 * @xfer_mode: XFER_* of interest
316 * Return matching xfer_mask for @xfer_mode.
322 * Matching xfer_mask, 0 if no match found.
324 static unsigned int ata_xfer_mode2mask(u8 xfer_mode
)
326 const struct ata_xfer_ent
*ent
;
328 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
329 if (xfer_mode
>= ent
->base
&& xfer_mode
< ent
->base
+ ent
->bits
)
330 return 1 << (ent
->shift
+ xfer_mode
- ent
->base
);
335 * ata_xfer_mode2shift - Find matching xfer_shift for XFER_*
336 * @xfer_mode: XFER_* of interest
338 * Return matching xfer_shift for @xfer_mode.
344 * Matching xfer_shift, -1 if no match found.
346 static int ata_xfer_mode2shift(unsigned int xfer_mode
)
348 const struct ata_xfer_ent
*ent
;
350 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
351 if (xfer_mode
>= ent
->base
&& xfer_mode
< ent
->base
+ ent
->bits
)
357 * ata_mode_string - convert xfer_mask to string
358 * @xfer_mask: mask of bits supported; only highest bit counts.
360 * Determine string which represents the highest speed
361 * (highest bit in @modemask).
367 * Constant C string representing highest speed listed in
368 * @mode_mask, or the constant C string "<n/a>".
370 static const char *ata_mode_string(unsigned int xfer_mask
)
372 static const char * const xfer_mode_str
[] = {
392 highbit
= fls(xfer_mask
) - 1;
393 if (highbit
>= 0 && highbit
< ARRAY_SIZE(xfer_mode_str
))
394 return xfer_mode_str
[highbit
];
398 static void ata_dev_disable(struct ata_port
*ap
, struct ata_device
*dev
)
400 if (ata_dev_present(dev
)) {
401 printk(KERN_WARNING
"ata%u: dev %u disabled\n",
408 * ata_pio_devchk - PATA device presence detection
409 * @ap: ATA channel to examine
410 * @device: Device to examine (starting at zero)
412 * This technique was originally described in
413 * Hale Landis's ATADRVR (www.ata-atapi.com), and
414 * later found its way into the ATA/ATAPI spec.
416 * Write a pattern to the ATA shadow registers,
417 * and if a device is present, it will respond by
418 * correctly storing and echoing back the
419 * ATA shadow register contents.
425 static unsigned int ata_pio_devchk(struct ata_port
*ap
,
428 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
431 ap
->ops
->dev_select(ap
, device
);
433 outb(0x55, ioaddr
->nsect_addr
);
434 outb(0xaa, ioaddr
->lbal_addr
);
436 outb(0xaa, ioaddr
->nsect_addr
);
437 outb(0x55, ioaddr
->lbal_addr
);
439 outb(0x55, ioaddr
->nsect_addr
);
440 outb(0xaa, ioaddr
->lbal_addr
);
442 nsect
= inb(ioaddr
->nsect_addr
);
443 lbal
= inb(ioaddr
->lbal_addr
);
445 if ((nsect
== 0x55) && (lbal
== 0xaa))
446 return 1; /* we found a device */
448 return 0; /* nothing found */
452 * ata_mmio_devchk - PATA device presence detection
453 * @ap: ATA channel to examine
454 * @device: Device to examine (starting at zero)
456 * This technique was originally described in
457 * Hale Landis's ATADRVR (www.ata-atapi.com), and
458 * later found its way into the ATA/ATAPI spec.
460 * Write a pattern to the ATA shadow registers,
461 * and if a device is present, it will respond by
462 * correctly storing and echoing back the
463 * ATA shadow register contents.
469 static unsigned int ata_mmio_devchk(struct ata_port
*ap
,
472 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
475 ap
->ops
->dev_select(ap
, device
);
477 writeb(0x55, (void __iomem
*) ioaddr
->nsect_addr
);
478 writeb(0xaa, (void __iomem
*) ioaddr
->lbal_addr
);
480 writeb(0xaa, (void __iomem
*) ioaddr
->nsect_addr
);
481 writeb(0x55, (void __iomem
*) ioaddr
->lbal_addr
);
483 writeb(0x55, (void __iomem
*) ioaddr
->nsect_addr
);
484 writeb(0xaa, (void __iomem
*) ioaddr
->lbal_addr
);
486 nsect
= readb((void __iomem
*) ioaddr
->nsect_addr
);
487 lbal
= readb((void __iomem
*) ioaddr
->lbal_addr
);
489 if ((nsect
== 0x55) && (lbal
== 0xaa))
490 return 1; /* we found a device */
492 return 0; /* nothing found */
496 * ata_devchk - PATA device presence detection
497 * @ap: ATA channel to examine
498 * @device: Device to examine (starting at zero)
500 * Dispatch ATA device presence detection, depending
501 * on whether we are using PIO or MMIO to talk to the
502 * ATA shadow registers.
508 static unsigned int ata_devchk(struct ata_port
*ap
,
511 if (ap
->flags
& ATA_FLAG_MMIO
)
512 return ata_mmio_devchk(ap
, device
);
513 return ata_pio_devchk(ap
, device
);
517 * ata_dev_classify - determine device type based on ATA-spec signature
518 * @tf: ATA taskfile register set for device to be identified
520 * Determine from taskfile register contents whether a device is
521 * ATA or ATAPI, as per "Signature and persistence" section
522 * of ATA/PI spec (volume 1, sect 5.14).
528 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, or %ATA_DEV_UNKNOWN
529 * the event of failure.
532 unsigned int ata_dev_classify(const struct ata_taskfile
*tf
)
534 /* Apple's open source Darwin code hints that some devices only
535 * put a proper signature into the LBA mid/high registers,
536 * So, we only check those. It's sufficient for uniqueness.
539 if (((tf
->lbam
== 0) && (tf
->lbah
== 0)) ||
540 ((tf
->lbam
== 0x3c) && (tf
->lbah
== 0xc3))) {
541 DPRINTK("found ATA device by sig\n");
545 if (((tf
->lbam
== 0x14) && (tf
->lbah
== 0xeb)) ||
546 ((tf
->lbam
== 0x69) && (tf
->lbah
== 0x96))) {
547 DPRINTK("found ATAPI device by sig\n");
548 return ATA_DEV_ATAPI
;
551 DPRINTK("unknown device\n");
552 return ATA_DEV_UNKNOWN
;
556 * ata_dev_try_classify - Parse returned ATA device signature
557 * @ap: ATA channel to examine
558 * @device: Device to examine (starting at zero)
559 * @r_err: Value of error register on completion
561 * After an event -- SRST, E.D.D., or SATA COMRESET -- occurs,
562 * an ATA/ATAPI-defined set of values is placed in the ATA
563 * shadow registers, indicating the results of device detection
566 * Select the ATA device, and read the values from the ATA shadow
567 * registers. Then parse according to the Error register value,
568 * and the spec-defined values examined by ata_dev_classify().
574 * Device type - %ATA_DEV_ATA, %ATA_DEV_ATAPI or %ATA_DEV_NONE.
578 ata_dev_try_classify(struct ata_port
*ap
, unsigned int device
, u8
*r_err
)
580 struct ata_taskfile tf
;
584 ap
->ops
->dev_select(ap
, device
);
586 memset(&tf
, 0, sizeof(tf
));
588 ap
->ops
->tf_read(ap
, &tf
);
593 /* see if device passed diags */
596 else if ((device
== 0) && (err
== 0x81))
601 /* determine if device is ATA or ATAPI */
602 class = ata_dev_classify(&tf
);
604 if (class == ATA_DEV_UNKNOWN
)
606 if ((class == ATA_DEV_ATA
) && (ata_chk_status(ap
) == 0))
612 * ata_id_string - Convert IDENTIFY DEVICE page into string
613 * @id: IDENTIFY DEVICE results we will examine
614 * @s: string into which data is output
615 * @ofs: offset into identify device page
616 * @len: length of string to return. must be an even number.
618 * The strings in the IDENTIFY DEVICE page are broken up into
619 * 16-bit chunks. Run through the string, and output each
620 * 8-bit chunk linearly, regardless of platform.
626 void ata_id_string(const u16
*id
, unsigned char *s
,
627 unsigned int ofs
, unsigned int len
)
646 * ata_id_c_string - Convert IDENTIFY DEVICE page into C string
647 * @id: IDENTIFY DEVICE results we will examine
648 * @s: string into which data is output
649 * @ofs: offset into identify device page
650 * @len: length of string to return. must be an odd number.
652 * This function is identical to ata_id_string except that it
653 * trims trailing spaces and terminates the resulting string with
654 * null. @len must be actual maximum length (even number) + 1.
659 void ata_id_c_string(const u16
*id
, unsigned char *s
,
660 unsigned int ofs
, unsigned int len
)
666 ata_id_string(id
, s
, ofs
, len
- 1);
668 p
= s
+ strnlen(s
, len
- 1);
669 while (p
> s
&& p
[-1] == ' ')
674 static u64
ata_id_n_sectors(const u16
*id
)
676 if (ata_id_has_lba(id
)) {
677 if (ata_id_has_lba48(id
))
678 return ata_id_u64(id
, 100);
680 return ata_id_u32(id
, 60);
682 if (ata_id_current_chs_valid(id
))
683 return ata_id_u32(id
, 57);
685 return id
[1] * id
[3] * id
[6];
690 * ata_noop_dev_select - Select device 0/1 on ATA bus
691 * @ap: ATA channel to manipulate
692 * @device: ATA device (numbered from zero) to select
694 * This function performs no actual function.
696 * May be used as the dev_select() entry in ata_port_operations.
701 void ata_noop_dev_select (struct ata_port
*ap
, unsigned int device
)
707 * ata_std_dev_select - Select device 0/1 on ATA bus
708 * @ap: ATA channel to manipulate
709 * @device: ATA device (numbered from zero) to select
711 * Use the method defined in the ATA specification to
712 * make either device 0, or device 1, active on the
713 * ATA channel. Works with both PIO and MMIO.
715 * May be used as the dev_select() entry in ata_port_operations.
721 void ata_std_dev_select (struct ata_port
*ap
, unsigned int device
)
726 tmp
= ATA_DEVICE_OBS
;
728 tmp
= ATA_DEVICE_OBS
| ATA_DEV1
;
730 if (ap
->flags
& ATA_FLAG_MMIO
) {
731 writeb(tmp
, (void __iomem
*) ap
->ioaddr
.device_addr
);
733 outb(tmp
, ap
->ioaddr
.device_addr
);
735 ata_pause(ap
); /* needed; also flushes, for mmio */
739 * ata_dev_select - Select device 0/1 on ATA bus
740 * @ap: ATA channel to manipulate
741 * @device: ATA device (numbered from zero) to select
742 * @wait: non-zero to wait for Status register BSY bit to clear
743 * @can_sleep: non-zero if context allows sleeping
745 * Use the method defined in the ATA specification to
746 * make either device 0, or device 1, active on the
749 * This is a high-level version of ata_std_dev_select(),
750 * which additionally provides the services of inserting
751 * the proper pauses and status polling, where needed.
757 void ata_dev_select(struct ata_port
*ap
, unsigned int device
,
758 unsigned int wait
, unsigned int can_sleep
)
760 VPRINTK("ENTER, ata%u: device %u, wait %u\n",
761 ap
->id
, device
, wait
);
766 ap
->ops
->dev_select(ap
, device
);
769 if (can_sleep
&& ap
->device
[device
].class == ATA_DEV_ATAPI
)
776 * ata_dump_id - IDENTIFY DEVICE info debugging output
777 * @id: IDENTIFY DEVICE page to dump
779 * Dump selected 16-bit words from the given IDENTIFY DEVICE
786 static inline void ata_dump_id(const u16
*id
)
788 DPRINTK("49==0x%04x "
798 DPRINTK("80==0x%04x "
808 DPRINTK("88==0x%04x "
815 * ata_id_xfermask - Compute xfermask from the given IDENTIFY data
816 * @id: IDENTIFY data to compute xfer mask from
818 * Compute the xfermask for this device. This is not as trivial
819 * as it seems if we must consider early devices correctly.
821 * FIXME: pre IDE drive timing (do we care ?).
829 static unsigned int ata_id_xfermask(const u16
*id
)
831 unsigned int pio_mask
, mwdma_mask
, udma_mask
;
833 /* Usual case. Word 53 indicates word 64 is valid */
834 if (id
[ATA_ID_FIELD_VALID
] & (1 << 1)) {
835 pio_mask
= id
[ATA_ID_PIO_MODES
] & 0x03;
839 /* If word 64 isn't valid then Word 51 high byte holds
840 * the PIO timing number for the maximum. Turn it into
843 pio_mask
= (2 << (id
[ATA_ID_OLD_PIO_MODES
] & 0xFF)) - 1 ;
845 /* But wait.. there's more. Design your standards by
846 * committee and you too can get a free iordy field to
847 * process. However its the speeds not the modes that
848 * are supported... Note drivers using the timing API
849 * will get this right anyway
853 mwdma_mask
= id
[ATA_ID_MWDMA_MODES
] & 0x07;
856 if (id
[ATA_ID_FIELD_VALID
] & (1 << 2))
857 udma_mask
= id
[ATA_ID_UDMA_MODES
] & 0xff;
859 return ata_pack_xfermask(pio_mask
, mwdma_mask
, udma_mask
);
863 * ata_port_queue_task - Queue port_task
864 * @ap: The ata_port to queue port_task for
866 * Schedule @fn(@data) for execution after @delay jiffies using
867 * port_task. There is one port_task per port and it's the
868 * user(low level driver)'s responsibility to make sure that only
869 * one task is active at any given time.
871 * libata core layer takes care of synchronization between
872 * port_task and EH. ata_port_queue_task() may be ignored for EH
876 * Inherited from caller.
878 void ata_port_queue_task(struct ata_port
*ap
, void (*fn
)(void *), void *data
,
883 if (ap
->flags
& ATA_FLAG_FLUSH_PORT_TASK
)
886 PREPARE_WORK(&ap
->port_task
, fn
, data
);
889 rc
= queue_work(ata_wq
, &ap
->port_task
);
891 rc
= queue_delayed_work(ata_wq
, &ap
->port_task
, delay
);
893 /* rc == 0 means that another user is using port task */
898 * ata_port_flush_task - Flush port_task
899 * @ap: The ata_port to flush port_task for
901 * After this function completes, port_task is guranteed not to
902 * be running or scheduled.
905 * Kernel thread context (may sleep)
907 void ata_port_flush_task(struct ata_port
*ap
)
913 spin_lock_irqsave(&ap
->host_set
->lock
, flags
);
914 ap
->flags
|= ATA_FLAG_FLUSH_PORT_TASK
;
915 spin_unlock_irqrestore(&ap
->host_set
->lock
, flags
);
917 DPRINTK("flush #1\n");
918 flush_workqueue(ata_wq
);
921 * At this point, if a task is running, it's guaranteed to see
922 * the FLUSH flag; thus, it will never queue pio tasks again.
925 if (!cancel_delayed_work(&ap
->port_task
)) {
926 DPRINTK("flush #2\n");
927 flush_workqueue(ata_wq
);
930 spin_lock_irqsave(&ap
->host_set
->lock
, flags
);
931 ap
->flags
&= ~ATA_FLAG_FLUSH_PORT_TASK
;
932 spin_unlock_irqrestore(&ap
->host_set
->lock
, flags
);
937 void ata_qc_complete_internal(struct ata_queued_cmd
*qc
)
939 struct completion
*waiting
= qc
->private_data
;
941 qc
->ap
->ops
->tf_read(qc
->ap
, &qc
->tf
);
946 * ata_exec_internal - execute libata internal command
947 * @ap: Port to which the command is sent
948 * @dev: Device to which the command is sent
949 * @tf: Taskfile registers for the command and the result
950 * @dma_dir: Data tranfer direction of the command
951 * @buf: Data buffer of the command
952 * @buflen: Length of data buffer
954 * Executes libata internal command with timeout. @tf contains
955 * command on entry and result on return. Timeout and error
956 * conditions are reported via return value. No recovery action
957 * is taken after a command times out. It's caller's duty to
958 * clean up after timeout.
961 * None. Should be called with kernel context, might sleep.
965 ata_exec_internal(struct ata_port
*ap
, struct ata_device
*dev
,
966 struct ata_taskfile
*tf
,
967 int dma_dir
, void *buf
, unsigned int buflen
)
969 u8 command
= tf
->command
;
970 struct ata_queued_cmd
*qc
;
971 DECLARE_COMPLETION(wait
);
973 unsigned int err_mask
;
975 spin_lock_irqsave(&ap
->host_set
->lock
, flags
);
977 qc
= ata_qc_new_init(ap
, dev
);
981 qc
->dma_dir
= dma_dir
;
982 if (dma_dir
!= DMA_NONE
) {
983 ata_sg_init_one(qc
, buf
, buflen
);
984 qc
->nsect
= buflen
/ ATA_SECT_SIZE
;
987 qc
->private_data
= &wait
;
988 qc
->complete_fn
= ata_qc_complete_internal
;
990 qc
->err_mask
= ata_qc_issue(qc
);
994 spin_unlock_irqrestore(&ap
->host_set
->lock
, flags
);
996 if (!wait_for_completion_timeout(&wait
, ATA_TMOUT_INTERNAL
)) {
997 ata_port_flush_task(ap
);
999 spin_lock_irqsave(&ap
->host_set
->lock
, flags
);
1001 /* We're racing with irq here. If we lose, the
1002 * following test prevents us from completing the qc
1003 * again. If completion irq occurs after here but
1004 * before the caller cleans up, it will result in a
1005 * spurious interrupt. We can live with that.
1007 if (qc
->flags
& ATA_QCFLAG_ACTIVE
) {
1008 qc
->err_mask
= AC_ERR_TIMEOUT
;
1009 ata_qc_complete(qc
);
1010 printk(KERN_WARNING
"ata%u: qc timeout (cmd 0x%x)\n",
1014 spin_unlock_irqrestore(&ap
->host_set
->lock
, flags
);
1018 err_mask
= qc
->err_mask
;
1022 /* XXX - Some LLDDs (sata_mv) disable port on command failure.
1023 * Until those drivers are fixed, we detect the condition
1024 * here, fail the command with AC_ERR_SYSTEM and reenable the
1027 * Note that this doesn't change any behavior as internal
1028 * command failure results in disabling the device in the
1029 * higher layer for LLDDs without new reset/EH callbacks.
1031 * Kill the following code as soon as those drivers are fixed.
1033 if (ap
->flags
& ATA_FLAG_PORT_DISABLED
) {
1034 err_mask
|= AC_ERR_SYSTEM
;
1042 * ata_pio_need_iordy - check if iordy needed
1045 * Check if the current speed of the device requires IORDY. Used
1046 * by various controllers for chip configuration.
1049 unsigned int ata_pio_need_iordy(const struct ata_device
*adev
)
1052 int speed
= adev
->pio_mode
- XFER_PIO_0
;
1059 /* If we have no drive specific rule, then PIO 2 is non IORDY */
1061 if (adev
->id
[ATA_ID_FIELD_VALID
] & 2) { /* EIDE */
1062 pio
= adev
->id
[ATA_ID_EIDE_PIO
];
1063 /* Is the speed faster than the drive allows non IORDY ? */
1065 /* This is cycle times not frequency - watch the logic! */
1066 if (pio
> 240) /* PIO2 is 240nS per cycle */
1075 * ata_dev_read_id - Read ID data from the specified device
1076 * @ap: port on which target device resides
1077 * @dev: target device
1078 * @p_class: pointer to class of the target device (may be changed)
1079 * @post_reset: is this read ID post-reset?
1080 * @p_id: read IDENTIFY page (newly allocated)
1082 * Read ID data from the specified device. ATA_CMD_ID_ATA is
1083 * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
1084 * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS
1085 * for pre-ATA4 drives.
1088 * Kernel thread context (may sleep)
1091 * 0 on success, -errno otherwise.
1093 static int ata_dev_read_id(struct ata_port
*ap
, struct ata_device
*dev
,
1094 unsigned int *p_class
, int post_reset
, u16
**p_id
)
1096 unsigned int class = *p_class
;
1097 struct ata_taskfile tf
;
1098 unsigned int err_mask
= 0;
1103 DPRINTK("ENTER, host %u, dev %u\n", ap
->id
, dev
->devno
);
1105 ata_dev_select(ap
, dev
->devno
, 1, 1); /* select device 0/1 */
1107 id
= kmalloc(sizeof(id
[0]) * ATA_ID_WORDS
, GFP_KERNEL
);
1110 reason
= "out of memory";
1115 ata_tf_init(ap
, &tf
, dev
->devno
);
1119 tf
.command
= ATA_CMD_ID_ATA
;
1122 tf
.command
= ATA_CMD_ID_ATAPI
;
1126 reason
= "unsupported class";
1130 tf
.protocol
= ATA_PROT_PIO
;
1132 err_mask
= ata_exec_internal(ap
, dev
, &tf
, DMA_FROM_DEVICE
,
1133 id
, sizeof(id
[0]) * ATA_ID_WORDS
);
1136 reason
= "I/O error";
1140 swap_buf_le16(id
, ATA_ID_WORDS
);
1143 if ((class == ATA_DEV_ATA
) != ata_id_is_ata(id
)) {
1145 reason
= "device reports illegal type";
1149 if (post_reset
&& class == ATA_DEV_ATA
) {
1151 * The exact sequence expected by certain pre-ATA4 drives is:
1154 * INITIALIZE DEVICE PARAMETERS
1156 * Some drives were very specific about that exact sequence.
1158 if (ata_id_major_version(id
) < 4 || !ata_id_has_lba(id
)) {
1159 err_mask
= ata_dev_init_params(ap
, dev
);
1162 reason
= "INIT_DEV_PARAMS failed";
1166 /* current CHS translation info (id[53-58]) might be
1167 * changed. reread the identify device info.
1179 printk(KERN_WARNING
"ata%u: dev %u failed to IDENTIFY (%s)\n",
1180 ap
->id
, dev
->devno
, reason
);
1185 static inline u8
ata_dev_knobble(const struct ata_port
*ap
,
1186 struct ata_device
*dev
)
1188 return ((ap
->cbl
== ATA_CBL_SATA
) && (!ata_id_is_sata(dev
->id
)));
1192 * ata_dev_configure - Configure the specified ATA/ATAPI device
1193 * @ap: Port on which target device resides
1194 * @dev: Target device to configure
1195 * @print_info: Enable device info printout
1197 * Configure @dev according to @dev->id. Generic and low-level
1198 * driver specific fixups are also applied.
1201 * Kernel thread context (may sleep)
1204 * 0 on success, -errno otherwise
1206 static int ata_dev_configure(struct ata_port
*ap
, struct ata_device
*dev
,
1209 const u16
*id
= dev
->id
;
1210 unsigned int xfer_mask
;
1213 if (!ata_dev_present(dev
)) {
1214 DPRINTK("ENTER/EXIT (host %u, dev %u) -- nodev\n",
1215 ap
->id
, dev
->devno
);
1219 DPRINTK("ENTER, host %u, dev %u\n", ap
->id
, dev
->devno
);
1221 /* print device capabilities */
1223 printk(KERN_DEBUG
"ata%u: dev %u cfg 49:%04x 82:%04x 83:%04x "
1224 "84:%04x 85:%04x 86:%04x 87:%04x 88:%04x\n",
1225 ap
->id
, dev
->devno
, id
[49], id
[82], id
[83],
1226 id
[84], id
[85], id
[86], id
[87], id
[88]);
1228 /* initialize to-be-configured parameters */
1230 dev
->max_sectors
= 0;
1238 * common ATA, ATAPI feature tests
1241 /* find max transfer mode; for printk only */
1242 xfer_mask
= ata_id_xfermask(id
);
1246 /* ATA-specific feature tests */
1247 if (dev
->class == ATA_DEV_ATA
) {
1248 dev
->n_sectors
= ata_id_n_sectors(id
);
1250 if (ata_id_has_lba(id
)) {
1251 const char *lba_desc
;
1254 dev
->flags
|= ATA_DFLAG_LBA
;
1255 if (ata_id_has_lba48(id
)) {
1256 dev
->flags
|= ATA_DFLAG_LBA48
;
1260 /* print device info to dmesg */
1262 printk(KERN_INFO
"ata%u: dev %u ATA-%d, "
1263 "max %s, %Lu sectors: %s\n",
1265 ata_id_major_version(id
),
1266 ata_mode_string(xfer_mask
),
1267 (unsigned long long)dev
->n_sectors
,
1272 /* Default translation */
1273 dev
->cylinders
= id
[1];
1275 dev
->sectors
= id
[6];
1277 if (ata_id_current_chs_valid(id
)) {
1278 /* Current CHS translation is valid. */
1279 dev
->cylinders
= id
[54];
1280 dev
->heads
= id
[55];
1281 dev
->sectors
= id
[56];
1284 /* print device info to dmesg */
1286 printk(KERN_INFO
"ata%u: dev %u ATA-%d, "
1287 "max %s, %Lu sectors: CHS %u/%u/%u\n",
1289 ata_id_major_version(id
),
1290 ata_mode_string(xfer_mask
),
1291 (unsigned long long)dev
->n_sectors
,
1292 dev
->cylinders
, dev
->heads
, dev
->sectors
);
1295 if (dev
->id
[59] & 0x100) {
1296 dev
->multi_count
= dev
->id
[59] & 0xff;
1297 DPRINTK("ata%u: dev %u multi count %u\n",
1298 ap
->id
, dev
->devno
, dev
->multi_count
);
1304 /* ATAPI-specific feature tests */
1305 else if (dev
->class == ATA_DEV_ATAPI
) {
1306 rc
= atapi_cdb_len(id
);
1307 if ((rc
< 12) || (rc
> ATAPI_CDB_LEN
)) {
1308 printk(KERN_WARNING
"ata%u: unsupported CDB len\n", ap
->id
);
1312 dev
->cdb_len
= (unsigned int) rc
;
1314 if (ata_id_cdb_intr(dev
->id
))
1315 dev
->flags
|= ATA_DFLAG_CDB_INTR
;
1317 /* print device info to dmesg */
1319 printk(KERN_INFO
"ata%u: dev %u ATAPI, max %s\n",
1320 ap
->id
, dev
->devno
, ata_mode_string(xfer_mask
));
1323 ap
->host
->max_cmd_len
= 0;
1324 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
1325 ap
->host
->max_cmd_len
= max_t(unsigned int,
1326 ap
->host
->max_cmd_len
,
1327 ap
->device
[i
].cdb_len
);
1329 /* limit bridge transfers to udma5, 200 sectors */
1330 if (ata_dev_knobble(ap
, dev
)) {
1332 printk(KERN_INFO
"ata%u(%u): applying bridge limits\n",
1333 ap
->id
, dev
->devno
);
1334 dev
->udma_mask
&= ATA_UDMA5
;
1335 dev
->max_sectors
= ATA_MAX_SECTORS
;
1338 if (ap
->ops
->dev_config
)
1339 ap
->ops
->dev_config(ap
, dev
);
1341 DPRINTK("EXIT, drv_stat = 0x%x\n", ata_chk_status(ap
));
1345 DPRINTK("EXIT, err\n");
1350 * ata_bus_probe - Reset and probe ATA bus
1353 * Master ATA bus probing function. Initiates a hardware-dependent
1354 * bus reset, then attempts to identify any devices found on
1358 * PCI/etc. bus probe sem.
1361 * Zero on success, non-zero on error.
1364 static int ata_bus_probe(struct ata_port
*ap
)
1366 unsigned int classes
[ATA_MAX_DEVICES
];
1367 unsigned int i
, rc
, found
= 0;
1371 /* reset and determine device classes */
1372 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
1373 classes
[i
] = ATA_DEV_UNKNOWN
;
1375 if (ap
->ops
->probe_reset
) {
1376 rc
= ap
->ops
->probe_reset(ap
, classes
);
1378 printk("ata%u: reset failed (errno=%d)\n", ap
->id
, rc
);
1382 ap
->ops
->phy_reset(ap
);
1384 if (!(ap
->flags
& ATA_FLAG_PORT_DISABLED
))
1385 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
1386 classes
[i
] = ap
->device
[i
].class;
1391 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
1392 if (classes
[i
] == ATA_DEV_UNKNOWN
)
1393 classes
[i
] = ATA_DEV_NONE
;
1395 /* read IDENTIFY page and configure devices */
1396 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
1397 struct ata_device
*dev
= &ap
->device
[i
];
1399 dev
->class = classes
[i
];
1401 if (!ata_dev_present(dev
))
1404 WARN_ON(dev
->id
!= NULL
);
1405 if (ata_dev_read_id(ap
, dev
, &dev
->class, 1, &dev
->id
)) {
1406 dev
->class = ATA_DEV_NONE
;
1410 if (ata_dev_configure(ap
, dev
, 1)) {
1411 ata_dev_disable(ap
, dev
);
1419 goto err_out_disable
;
1422 if (ap
->flags
& ATA_FLAG_PORT_DISABLED
)
1423 goto err_out_disable
;
1428 ap
->ops
->port_disable(ap
);
1433 * ata_port_probe - Mark port as enabled
1434 * @ap: Port for which we indicate enablement
1436 * Modify @ap data structure such that the system
1437 * thinks that the entire port is enabled.
1439 * LOCKING: host_set lock, or some other form of
1443 void ata_port_probe(struct ata_port
*ap
)
1445 ap
->flags
&= ~ATA_FLAG_PORT_DISABLED
;
1449 * sata_print_link_status - Print SATA link status
1450 * @ap: SATA port to printk link status about
1452 * This function prints link speed and status of a SATA link.
1457 static void sata_print_link_status(struct ata_port
*ap
)
1462 if (!ap
->ops
->scr_read
)
1465 sstatus
= scr_read(ap
, SCR_STATUS
);
1467 if (sata_dev_present(ap
)) {
1468 tmp
= (sstatus
>> 4) & 0xf;
1471 else if (tmp
& (1 << 1))
1474 speed
= "<unknown>";
1475 printk(KERN_INFO
"ata%u: SATA link up %s Gbps (SStatus %X)\n",
1476 ap
->id
, speed
, sstatus
);
1478 printk(KERN_INFO
"ata%u: SATA link down (SStatus %X)\n",
1484 * __sata_phy_reset - Wake/reset a low-level SATA PHY
1485 * @ap: SATA port associated with target SATA PHY.
1487 * This function issues commands to standard SATA Sxxx
1488 * PHY registers, to wake up the phy (and device), and
1489 * clear any reset condition.
1492 * PCI/etc. bus probe sem.
1495 void __sata_phy_reset(struct ata_port
*ap
)
1498 unsigned long timeout
= jiffies
+ (HZ
* 5);
1500 if (ap
->flags
& ATA_FLAG_SATA_RESET
) {
1501 /* issue phy wake/reset */
1502 scr_write_flush(ap
, SCR_CONTROL
, 0x301);
1503 /* Couldn't find anything in SATA I/II specs, but
1504 * AHCI-1.1 10.4.2 says at least 1 ms. */
1507 scr_write_flush(ap
, SCR_CONTROL
, 0x300); /* phy wake/clear reset */
1509 /* wait for phy to become ready, if necessary */
1512 sstatus
= scr_read(ap
, SCR_STATUS
);
1513 if ((sstatus
& 0xf) != 1)
1515 } while (time_before(jiffies
, timeout
));
1517 /* print link status */
1518 sata_print_link_status(ap
);
1520 /* TODO: phy layer with polling, timeouts, etc. */
1521 if (sata_dev_present(ap
))
1524 ata_port_disable(ap
);
1526 if (ap
->flags
& ATA_FLAG_PORT_DISABLED
)
1529 if (ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
)) {
1530 ata_port_disable(ap
);
1534 ap
->cbl
= ATA_CBL_SATA
;
1538 * sata_phy_reset - Reset SATA bus.
1539 * @ap: SATA port associated with target SATA PHY.
1541 * This function resets the SATA bus, and then probes
1542 * the bus for devices.
1545 * PCI/etc. bus probe sem.
1548 void sata_phy_reset(struct ata_port
*ap
)
1550 __sata_phy_reset(ap
);
1551 if (ap
->flags
& ATA_FLAG_PORT_DISABLED
)
1557 * ata_dev_pair - return other device on cable
1561 * Obtain the other device on the same cable, or if none is
1562 * present NULL is returned
1565 struct ata_device
*ata_dev_pair(struct ata_port
*ap
, struct ata_device
*adev
)
1567 struct ata_device
*pair
= &ap
->device
[1 - adev
->devno
];
1568 if (!ata_dev_present(pair
))
1574 * ata_port_disable - Disable port.
1575 * @ap: Port to be disabled.
1577 * Modify @ap data structure such that the system
1578 * thinks that the entire port is disabled, and should
1579 * never attempt to probe or communicate with devices
1582 * LOCKING: host_set lock, or some other form of
1586 void ata_port_disable(struct ata_port
*ap
)
1588 ap
->device
[0].class = ATA_DEV_NONE
;
1589 ap
->device
[1].class = ATA_DEV_NONE
;
1590 ap
->flags
|= ATA_FLAG_PORT_DISABLED
;
1594 * This mode timing computation functionality is ported over from
1595 * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik
1598 * PIO 0-5, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
1599 * These were taken from ATA/ATAPI-6 standard, rev 0a, except
1600 * for PIO 5, which is a nonstandard extension and UDMA6, which
1601 * is currently supported only by Maxtor drives.
1604 static const struct ata_timing ata_timing
[] = {
1606 { XFER_UDMA_6
, 0, 0, 0, 0, 0, 0, 0, 15 },
1607 { XFER_UDMA_5
, 0, 0, 0, 0, 0, 0, 0, 20 },
1608 { XFER_UDMA_4
, 0, 0, 0, 0, 0, 0, 0, 30 },
1609 { XFER_UDMA_3
, 0, 0, 0, 0, 0, 0, 0, 45 },
1611 { XFER_UDMA_2
, 0, 0, 0, 0, 0, 0, 0, 60 },
1612 { XFER_UDMA_1
, 0, 0, 0, 0, 0, 0, 0, 80 },
1613 { XFER_UDMA_0
, 0, 0, 0, 0, 0, 0, 0, 120 },
1615 /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */
1617 { XFER_MW_DMA_2
, 25, 0, 0, 0, 70, 25, 120, 0 },
1618 { XFER_MW_DMA_1
, 45, 0, 0, 0, 80, 50, 150, 0 },
1619 { XFER_MW_DMA_0
, 60, 0, 0, 0, 215, 215, 480, 0 },
1621 { XFER_SW_DMA_2
, 60, 0, 0, 0, 120, 120, 240, 0 },
1622 { XFER_SW_DMA_1
, 90, 0, 0, 0, 240, 240, 480, 0 },
1623 { XFER_SW_DMA_0
, 120, 0, 0, 0, 480, 480, 960, 0 },
1625 /* { XFER_PIO_5, 20, 50, 30, 100, 50, 30, 100, 0 }, */
1626 { XFER_PIO_4
, 25, 70, 25, 120, 70, 25, 120, 0 },
1627 { XFER_PIO_3
, 30, 80, 70, 180, 80, 70, 180, 0 },
1629 { XFER_PIO_2
, 30, 290, 40, 330, 100, 90, 240, 0 },
1630 { XFER_PIO_1
, 50, 290, 93, 383, 125, 100, 383, 0 },
1631 { XFER_PIO_0
, 70, 290, 240, 600, 165, 150, 600, 0 },
1633 /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */
1638 #define ENOUGH(v,unit) (((v)-1)/(unit)+1)
1639 #define EZ(v,unit) ((v)?ENOUGH(v,unit):0)
1641 static void ata_timing_quantize(const struct ata_timing
*t
, struct ata_timing
*q
, int T
, int UT
)
1643 q
->setup
= EZ(t
->setup
* 1000, T
);
1644 q
->act8b
= EZ(t
->act8b
* 1000, T
);
1645 q
->rec8b
= EZ(t
->rec8b
* 1000, T
);
1646 q
->cyc8b
= EZ(t
->cyc8b
* 1000, T
);
1647 q
->active
= EZ(t
->active
* 1000, T
);
1648 q
->recover
= EZ(t
->recover
* 1000, T
);
1649 q
->cycle
= EZ(t
->cycle
* 1000, T
);
1650 q
->udma
= EZ(t
->udma
* 1000, UT
);
1653 void ata_timing_merge(const struct ata_timing
*a
, const struct ata_timing
*b
,
1654 struct ata_timing
*m
, unsigned int what
)
1656 if (what
& ATA_TIMING_SETUP
) m
->setup
= max(a
->setup
, b
->setup
);
1657 if (what
& ATA_TIMING_ACT8B
) m
->act8b
= max(a
->act8b
, b
->act8b
);
1658 if (what
& ATA_TIMING_REC8B
) m
->rec8b
= max(a
->rec8b
, b
->rec8b
);
1659 if (what
& ATA_TIMING_CYC8B
) m
->cyc8b
= max(a
->cyc8b
, b
->cyc8b
);
1660 if (what
& ATA_TIMING_ACTIVE
) m
->active
= max(a
->active
, b
->active
);
1661 if (what
& ATA_TIMING_RECOVER
) m
->recover
= max(a
->recover
, b
->recover
);
1662 if (what
& ATA_TIMING_CYCLE
) m
->cycle
= max(a
->cycle
, b
->cycle
);
1663 if (what
& ATA_TIMING_UDMA
) m
->udma
= max(a
->udma
, b
->udma
);
1666 static const struct ata_timing
* ata_timing_find_mode(unsigned short speed
)
1668 const struct ata_timing
*t
;
1670 for (t
= ata_timing
; t
->mode
!= speed
; t
++)
1671 if (t
->mode
== 0xFF)
1676 int ata_timing_compute(struct ata_device
*adev
, unsigned short speed
,
1677 struct ata_timing
*t
, int T
, int UT
)
1679 const struct ata_timing
*s
;
1680 struct ata_timing p
;
1686 if (!(s
= ata_timing_find_mode(speed
)))
1689 memcpy(t
, s
, sizeof(*s
));
1692 * If the drive is an EIDE drive, it can tell us it needs extended
1693 * PIO/MW_DMA cycle timing.
1696 if (adev
->id
[ATA_ID_FIELD_VALID
] & 2) { /* EIDE drive */
1697 memset(&p
, 0, sizeof(p
));
1698 if(speed
>= XFER_PIO_0
&& speed
<= XFER_SW_DMA_0
) {
1699 if (speed
<= XFER_PIO_2
) p
.cycle
= p
.cyc8b
= adev
->id
[ATA_ID_EIDE_PIO
];
1700 else p
.cycle
= p
.cyc8b
= adev
->id
[ATA_ID_EIDE_PIO_IORDY
];
1701 } else if(speed
>= XFER_MW_DMA_0
&& speed
<= XFER_MW_DMA_2
) {
1702 p
.cycle
= adev
->id
[ATA_ID_EIDE_DMA_MIN
];
1704 ata_timing_merge(&p
, t
, t
, ATA_TIMING_CYCLE
| ATA_TIMING_CYC8B
);
1708 * Convert the timing to bus clock counts.
1711 ata_timing_quantize(t
, t
, T
, UT
);
1714 * Even in DMA/UDMA modes we still use PIO access for IDENTIFY,
1715 * S.M.A.R.T * and some other commands. We have to ensure that the
1716 * DMA cycle timing is slower/equal than the fastest PIO timing.
1719 if (speed
> XFER_PIO_4
) {
1720 ata_timing_compute(adev
, adev
->pio_mode
, &p
, T
, UT
);
1721 ata_timing_merge(&p
, t
, t
, ATA_TIMING_ALL
);
1725 * Lengthen active & recovery time so that cycle time is correct.
1728 if (t
->act8b
+ t
->rec8b
< t
->cyc8b
) {
1729 t
->act8b
+= (t
->cyc8b
- (t
->act8b
+ t
->rec8b
)) / 2;
1730 t
->rec8b
= t
->cyc8b
- t
->act8b
;
1733 if (t
->active
+ t
->recover
< t
->cycle
) {
1734 t
->active
+= (t
->cycle
- (t
->active
+ t
->recover
)) / 2;
1735 t
->recover
= t
->cycle
- t
->active
;
1741 static int ata_dev_set_mode(struct ata_port
*ap
, struct ata_device
*dev
)
1743 unsigned int err_mask
;
1746 if (dev
->xfer_shift
== ATA_SHIFT_PIO
)
1747 dev
->flags
|= ATA_DFLAG_PIO
;
1749 err_mask
= ata_dev_set_xfermode(ap
, dev
);
1752 "ata%u: failed to set xfermode (err_mask=0x%x)\n",
1757 rc
= ata_dev_revalidate(ap
, dev
, 0);
1760 "ata%u: failed to revalidate after set xfermode\n",
1765 DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
1766 dev
->xfer_shift
, (int)dev
->xfer_mode
);
1768 printk(KERN_INFO
"ata%u: dev %u configured for %s\n",
1770 ata_mode_string(ata_xfer_mode2mask(dev
->xfer_mode
)));
1774 static int ata_host_set_pio(struct ata_port
*ap
)
1778 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
1779 struct ata_device
*dev
= &ap
->device
[i
];
1781 if (!ata_dev_present(dev
))
1784 if (!dev
->pio_mode
) {
1785 printk(KERN_WARNING
"ata%u: no PIO support for device %d.\n", ap
->id
, i
);
1789 dev
->xfer_mode
= dev
->pio_mode
;
1790 dev
->xfer_shift
= ATA_SHIFT_PIO
;
1791 if (ap
->ops
->set_piomode
)
1792 ap
->ops
->set_piomode(ap
, dev
);
1798 static void ata_host_set_dma(struct ata_port
*ap
)
1802 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
1803 struct ata_device
*dev
= &ap
->device
[i
];
1805 if (!ata_dev_present(dev
) || !dev
->dma_mode
)
1808 dev
->xfer_mode
= dev
->dma_mode
;
1809 dev
->xfer_shift
= ata_xfer_mode2shift(dev
->dma_mode
);
1810 if (ap
->ops
->set_dmamode
)
1811 ap
->ops
->set_dmamode(ap
, dev
);
1816 * ata_set_mode - Program timings and issue SET FEATURES - XFER
1817 * @ap: port on which timings will be programmed
1819 * Set ATA device disk transfer mode (PIO3, UDMA6, etc.).
1822 * PCI/etc. bus probe sem.
1824 static void ata_set_mode(struct ata_port
*ap
)
1828 /* step 1: calculate xfer_mask */
1829 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
1830 struct ata_device
*dev
= &ap
->device
[i
];
1831 unsigned int pio_mask
, dma_mask
;
1833 if (!ata_dev_present(dev
))
1836 ata_dev_xfermask(ap
, dev
);
1838 /* TODO: let LLDD filter dev->*_mask here */
1840 pio_mask
= ata_pack_xfermask(dev
->pio_mask
, 0, 0);
1841 dma_mask
= ata_pack_xfermask(0, dev
->mwdma_mask
, dev
->udma_mask
);
1842 dev
->pio_mode
= ata_xfer_mask2mode(pio_mask
);
1843 dev
->dma_mode
= ata_xfer_mask2mode(dma_mask
);
1846 /* step 2: always set host PIO timings */
1847 rc
= ata_host_set_pio(ap
);
1851 /* step 3: set host DMA timings */
1852 ata_host_set_dma(ap
);
1854 /* step 4: update devices' xfer mode */
1855 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
1856 struct ata_device
*dev
= &ap
->device
[i
];
1858 if (!ata_dev_present(dev
))
1861 if (ata_dev_set_mode(ap
, dev
))
1865 if (ap
->ops
->post_set_mode
)
1866 ap
->ops
->post_set_mode(ap
);
1871 ata_port_disable(ap
);
1875 * ata_tf_to_host - issue ATA taskfile to host controller
1876 * @ap: port to which command is being issued
1877 * @tf: ATA taskfile register set
1879 * Issues ATA taskfile register set to ATA host controller,
1880 * with proper synchronization with interrupt handler and
1884 * spin_lock_irqsave(host_set lock)
1887 static inline void ata_tf_to_host(struct ata_port
*ap
,
1888 const struct ata_taskfile
*tf
)
1890 ap
->ops
->tf_load(ap
, tf
);
1891 ap
->ops
->exec_command(ap
, tf
);
1895 * ata_busy_sleep - sleep until BSY clears, or timeout
1896 * @ap: port containing status register to be polled
1897 * @tmout_pat: impatience timeout
1898 * @tmout: overall timeout
1900 * Sleep until ATA Status register bit BSY clears,
1901 * or a timeout occurs.
1906 unsigned int ata_busy_sleep (struct ata_port
*ap
,
1907 unsigned long tmout_pat
, unsigned long tmout
)
1909 unsigned long timer_start
, timeout
;
1912 status
= ata_busy_wait(ap
, ATA_BUSY
, 300);
1913 timer_start
= jiffies
;
1914 timeout
= timer_start
+ tmout_pat
;
1915 while ((status
& ATA_BUSY
) && (time_before(jiffies
, timeout
))) {
1917 status
= ata_busy_wait(ap
, ATA_BUSY
, 3);
1920 if (status
& ATA_BUSY
)
1921 printk(KERN_WARNING
"ata%u is slow to respond, "
1922 "please be patient\n", ap
->id
);
1924 timeout
= timer_start
+ tmout
;
1925 while ((status
& ATA_BUSY
) && (time_before(jiffies
, timeout
))) {
1927 status
= ata_chk_status(ap
);
1930 if (status
& ATA_BUSY
) {
1931 printk(KERN_ERR
"ata%u failed to respond (%lu secs)\n",
1932 ap
->id
, tmout
/ HZ
);
1939 static void ata_bus_post_reset(struct ata_port
*ap
, unsigned int devmask
)
1941 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
1942 unsigned int dev0
= devmask
& (1 << 0);
1943 unsigned int dev1
= devmask
& (1 << 1);
1944 unsigned long timeout
;
1946 /* if device 0 was found in ata_devchk, wait for its
1950 ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
);
1952 /* if device 1 was found in ata_devchk, wait for
1953 * register access, then wait for BSY to clear
1955 timeout
= jiffies
+ ATA_TMOUT_BOOT
;
1959 ap
->ops
->dev_select(ap
, 1);
1960 if (ap
->flags
& ATA_FLAG_MMIO
) {
1961 nsect
= readb((void __iomem
*) ioaddr
->nsect_addr
);
1962 lbal
= readb((void __iomem
*) ioaddr
->lbal_addr
);
1964 nsect
= inb(ioaddr
->nsect_addr
);
1965 lbal
= inb(ioaddr
->lbal_addr
);
1967 if ((nsect
== 1) && (lbal
== 1))
1969 if (time_after(jiffies
, timeout
)) {
1973 msleep(50); /* give drive a breather */
1976 ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
);
1978 /* is all this really necessary? */
1979 ap
->ops
->dev_select(ap
, 0);
1981 ap
->ops
->dev_select(ap
, 1);
1983 ap
->ops
->dev_select(ap
, 0);
1986 static unsigned int ata_bus_softreset(struct ata_port
*ap
,
1987 unsigned int devmask
)
1989 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
1991 DPRINTK("ata%u: bus reset via SRST\n", ap
->id
);
1993 /* software reset. causes dev0 to be selected */
1994 if (ap
->flags
& ATA_FLAG_MMIO
) {
1995 writeb(ap
->ctl
, (void __iomem
*) ioaddr
->ctl_addr
);
1996 udelay(20); /* FIXME: flush */
1997 writeb(ap
->ctl
| ATA_SRST
, (void __iomem
*) ioaddr
->ctl_addr
);
1998 udelay(20); /* FIXME: flush */
1999 writeb(ap
->ctl
, (void __iomem
*) ioaddr
->ctl_addr
);
2001 outb(ap
->ctl
, ioaddr
->ctl_addr
);
2003 outb(ap
->ctl
| ATA_SRST
, ioaddr
->ctl_addr
);
2005 outb(ap
->ctl
, ioaddr
->ctl_addr
);
2008 /* spec mandates ">= 2ms" before checking status.
2009 * We wait 150ms, because that was the magic delay used for
2010 * ATAPI devices in Hale Landis's ATADRVR, for the period of time
2011 * between when the ATA command register is written, and then
2012 * status is checked. Because waiting for "a while" before
2013 * checking status is fine, post SRST, we perform this magic
2014 * delay here as well.
2016 * Old drivers/ide uses the 2mS rule and then waits for ready
2021 /* Before we perform post reset processing we want to see if
2022 the bus shows 0xFF because the odd clown forgets the D7 pulldown
2025 if (ata_check_status(ap
) == 0xFF)
2026 return 1; /* Positive is failure for some reason */
2028 ata_bus_post_reset(ap
, devmask
);
2034 * ata_bus_reset - reset host port and associated ATA channel
2035 * @ap: port to reset
2037 * This is typically the first time we actually start issuing
2038 * commands to the ATA channel. We wait for BSY to clear, then
2039 * issue EXECUTE DEVICE DIAGNOSTIC command, polling for its
2040 * result. Determine what devices, if any, are on the channel
2041 * by looking at the device 0/1 error register. Look at the signature
2042 * stored in each device's taskfile registers, to determine if
2043 * the device is ATA or ATAPI.
2046 * PCI/etc. bus probe sem.
2047 * Obtains host_set lock.
2050 * Sets ATA_FLAG_PORT_DISABLED if bus reset fails.
2053 void ata_bus_reset(struct ata_port
*ap
)
2055 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
2056 unsigned int slave_possible
= ap
->flags
& ATA_FLAG_SLAVE_POSS
;
2058 unsigned int dev0
, dev1
= 0, devmask
= 0;
2060 DPRINTK("ENTER, host %u, port %u\n", ap
->id
, ap
->port_no
);
2062 /* determine if device 0/1 are present */
2063 if (ap
->flags
& ATA_FLAG_SATA_RESET
)
2066 dev0
= ata_devchk(ap
, 0);
2068 dev1
= ata_devchk(ap
, 1);
2072 devmask
|= (1 << 0);
2074 devmask
|= (1 << 1);
2076 /* select device 0 again */
2077 ap
->ops
->dev_select(ap
, 0);
2079 /* issue bus reset */
2080 if (ap
->flags
& ATA_FLAG_SRST
)
2081 if (ata_bus_softreset(ap
, devmask
))
2085 * determine by signature whether we have ATA or ATAPI devices
2087 ap
->device
[0].class = ata_dev_try_classify(ap
, 0, &err
);
2088 if ((slave_possible
) && (err
!= 0x81))
2089 ap
->device
[1].class = ata_dev_try_classify(ap
, 1, &err
);
2091 /* re-enable interrupts */
2092 if (ap
->ioaddr
.ctl_addr
) /* FIXME: hack. create a hook instead */
2095 /* is double-select really necessary? */
2096 if (ap
->device
[1].class != ATA_DEV_NONE
)
2097 ap
->ops
->dev_select(ap
, 1);
2098 if (ap
->device
[0].class != ATA_DEV_NONE
)
2099 ap
->ops
->dev_select(ap
, 0);
2101 /* if no devices were detected, disable this port */
2102 if ((ap
->device
[0].class == ATA_DEV_NONE
) &&
2103 (ap
->device
[1].class == ATA_DEV_NONE
))
2106 if (ap
->flags
& (ATA_FLAG_SATA_RESET
| ATA_FLAG_SRST
)) {
2107 /* set up device control for ATA_FLAG_SATA_RESET */
2108 if (ap
->flags
& ATA_FLAG_MMIO
)
2109 writeb(ap
->ctl
, (void __iomem
*) ioaddr
->ctl_addr
);
2111 outb(ap
->ctl
, ioaddr
->ctl_addr
);
2118 printk(KERN_ERR
"ata%u: disabling port\n", ap
->id
);
2119 ap
->ops
->port_disable(ap
);
2124 static int sata_phy_resume(struct ata_port
*ap
)
2126 unsigned long timeout
= jiffies
+ (HZ
* 5);
2129 scr_write_flush(ap
, SCR_CONTROL
, 0x300);
2131 /* Wait for phy to become ready, if necessary. */
2134 sstatus
= scr_read(ap
, SCR_STATUS
);
2135 if ((sstatus
& 0xf) != 1)
2137 } while (time_before(jiffies
, timeout
));
2143 * ata_std_probeinit - initialize probing
2144 * @ap: port to be probed
2146 * @ap is about to be probed. Initialize it. This function is
2147 * to be used as standard callback for ata_drive_probe_reset().
2149 * NOTE!!! Do not use this function as probeinit if a low level
2150 * driver implements only hardreset. Just pass NULL as probeinit
2151 * in that case. Using this function is probably okay but doing
2152 * so makes reset sequence different from the original
2153 * ->phy_reset implementation and Jeff nervous. :-P
2155 extern void ata_std_probeinit(struct ata_port
*ap
)
2157 if (ap
->flags
& ATA_FLAG_SATA
&& ap
->ops
->scr_read
) {
2158 sata_phy_resume(ap
);
2159 if (sata_dev_present(ap
))
2160 ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
);
2165 * ata_std_softreset - reset host port via ATA SRST
2166 * @ap: port to reset
2167 * @verbose: fail verbosely
2168 * @classes: resulting classes of attached devices
2170 * Reset host port using ATA SRST. This function is to be used
2171 * as standard callback for ata_drive_*_reset() functions.
2174 * Kernel thread context (may sleep)
2177 * 0 on success, -errno otherwise.
2179 int ata_std_softreset(struct ata_port
*ap
, int verbose
, unsigned int *classes
)
2181 unsigned int slave_possible
= ap
->flags
& ATA_FLAG_SLAVE_POSS
;
2182 unsigned int devmask
= 0, err_mask
;
2187 if (ap
->ops
->scr_read
&& !sata_dev_present(ap
)) {
2188 classes
[0] = ATA_DEV_NONE
;
2192 /* determine if device 0/1 are present */
2193 if (ata_devchk(ap
, 0))
2194 devmask
|= (1 << 0);
2195 if (slave_possible
&& ata_devchk(ap
, 1))
2196 devmask
|= (1 << 1);
2198 /* select device 0 again */
2199 ap
->ops
->dev_select(ap
, 0);
2201 /* issue bus reset */
2202 DPRINTK("about to softreset, devmask=%x\n", devmask
);
2203 err_mask
= ata_bus_softreset(ap
, devmask
);
2206 printk(KERN_ERR
"ata%u: SRST failed (err_mask=0x%x)\n",
2209 DPRINTK("EXIT, softreset failed (err_mask=0x%x)\n",
2214 /* determine by signature whether we have ATA or ATAPI devices */
2215 classes
[0] = ata_dev_try_classify(ap
, 0, &err
);
2216 if (slave_possible
&& err
!= 0x81)
2217 classes
[1] = ata_dev_try_classify(ap
, 1, &err
);
2220 DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes
[0], classes
[1]);
2225 * sata_std_hardreset - reset host port via SATA phy reset
2226 * @ap: port to reset
2227 * @verbose: fail verbosely
2228 * @class: resulting class of attached device
2230 * SATA phy-reset host port using DET bits of SControl register.
2231 * This function is to be used as standard callback for
2232 * ata_drive_*_reset().
2235 * Kernel thread context (may sleep)
2238 * 0 on success, -errno otherwise.
2240 int sata_std_hardreset(struct ata_port
*ap
, int verbose
, unsigned int *class)
2244 /* Issue phy wake/reset */
2245 scr_write_flush(ap
, SCR_CONTROL
, 0x301);
2248 * Couldn't find anything in SATA I/II specs, but AHCI-1.1
2249 * 10.4.2 says at least 1 ms.
2253 /* Bring phy back */
2254 sata_phy_resume(ap
);
2256 /* TODO: phy layer with polling, timeouts, etc. */
2257 if (!sata_dev_present(ap
)) {
2258 *class = ATA_DEV_NONE
;
2259 DPRINTK("EXIT, link offline\n");
2263 if (ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
)) {
2265 printk(KERN_ERR
"ata%u: COMRESET failed "
2266 "(device not ready)\n", ap
->id
);
2268 DPRINTK("EXIT, device not ready\n");
2272 ap
->ops
->dev_select(ap
, 0); /* probably unnecessary */
2274 *class = ata_dev_try_classify(ap
, 0, NULL
);
2276 DPRINTK("EXIT, class=%u\n", *class);
2281 * ata_std_postreset - standard postreset callback
2282 * @ap: the target ata_port
2283 * @classes: classes of attached devices
2285 * This function is invoked after a successful reset. Note that
2286 * the device might have been reset more than once using
2287 * different reset methods before postreset is invoked.
2289 * This function is to be used as standard callback for
2290 * ata_drive_*_reset().
2293 * Kernel thread context (may sleep)
2295 void ata_std_postreset(struct ata_port
*ap
, unsigned int *classes
)
2299 /* set cable type if it isn't already set */
2300 if (ap
->cbl
== ATA_CBL_NONE
&& ap
->flags
& ATA_FLAG_SATA
)
2301 ap
->cbl
= ATA_CBL_SATA
;
2303 /* print link status */
2304 if (ap
->cbl
== ATA_CBL_SATA
)
2305 sata_print_link_status(ap
);
2307 /* re-enable interrupts */
2308 if (ap
->ioaddr
.ctl_addr
) /* FIXME: hack. create a hook instead */
2311 /* is double-select really necessary? */
2312 if (classes
[0] != ATA_DEV_NONE
)
2313 ap
->ops
->dev_select(ap
, 1);
2314 if (classes
[1] != ATA_DEV_NONE
)
2315 ap
->ops
->dev_select(ap
, 0);
2317 /* bail out if no device is present */
2318 if (classes
[0] == ATA_DEV_NONE
&& classes
[1] == ATA_DEV_NONE
) {
2319 DPRINTK("EXIT, no device\n");
2323 /* set up device control */
2324 if (ap
->ioaddr
.ctl_addr
) {
2325 if (ap
->flags
& ATA_FLAG_MMIO
)
2326 writeb(ap
->ctl
, (void __iomem
*) ap
->ioaddr
.ctl_addr
);
2328 outb(ap
->ctl
, ap
->ioaddr
.ctl_addr
);
2335 * ata_std_probe_reset - standard probe reset method
2336 * @ap: prot to perform probe-reset
2337 * @classes: resulting classes of attached devices
2339 * The stock off-the-shelf ->probe_reset method.
2342 * Kernel thread context (may sleep)
2345 * 0 on success, -errno otherwise.
2347 int ata_std_probe_reset(struct ata_port
*ap
, unsigned int *classes
)
2349 ata_reset_fn_t hardreset
;
2352 if (ap
->flags
& ATA_FLAG_SATA
&& ap
->ops
->scr_read
)
2353 hardreset
= sata_std_hardreset
;
2355 return ata_drive_probe_reset(ap
, ata_std_probeinit
,
2356 ata_std_softreset
, hardreset
,
2357 ata_std_postreset
, classes
);
2360 static int do_probe_reset(struct ata_port
*ap
, ata_reset_fn_t reset
,
2361 ata_postreset_fn_t postreset
,
2362 unsigned int *classes
)
2366 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
2367 classes
[i
] = ATA_DEV_UNKNOWN
;
2369 rc
= reset(ap
, 0, classes
);
2373 /* If any class isn't ATA_DEV_UNKNOWN, consider classification
2374 * is complete and convert all ATA_DEV_UNKNOWN to
2377 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
2378 if (classes
[i
] != ATA_DEV_UNKNOWN
)
2381 if (i
< ATA_MAX_DEVICES
)
2382 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
2383 if (classes
[i
] == ATA_DEV_UNKNOWN
)
2384 classes
[i
] = ATA_DEV_NONE
;
2387 postreset(ap
, classes
);
2389 return classes
[0] != ATA_DEV_UNKNOWN
? 0 : -ENODEV
;
2393 * ata_drive_probe_reset - Perform probe reset with given methods
2394 * @ap: port to reset
2395 * @probeinit: probeinit method (can be NULL)
2396 * @softreset: softreset method (can be NULL)
2397 * @hardreset: hardreset method (can be NULL)
2398 * @postreset: postreset method (can be NULL)
2399 * @classes: resulting classes of attached devices
2401 * Reset the specified port and classify attached devices using
2402 * given methods. This function prefers softreset but tries all
2403 * possible reset sequences to reset and classify devices. This
2404 * function is intended to be used for constructing ->probe_reset
2405 * callback by low level drivers.
2407 * Reset methods should follow the following rules.
2409 * - Return 0 on sucess, -errno on failure.
2410 * - If classification is supported, fill classes[] with
2411 * recognized class codes.
2412 * - If classification is not supported, leave classes[] alone.
2413 * - If verbose is non-zero, print error message on failure;
2414 * otherwise, shut up.
2417 * Kernel thread context (may sleep)
2420 * 0 on success, -EINVAL if no reset method is avaliable, -ENODEV
2421 * if classification fails, and any error code from reset
2424 int ata_drive_probe_reset(struct ata_port
*ap
, ata_probeinit_fn_t probeinit
,
2425 ata_reset_fn_t softreset
, ata_reset_fn_t hardreset
,
2426 ata_postreset_fn_t postreset
, unsigned int *classes
)
2434 rc
= do_probe_reset(ap
, softreset
, postreset
, classes
);
2442 rc
= do_probe_reset(ap
, hardreset
, postreset
, classes
);
2443 if (rc
== 0 || rc
!= -ENODEV
)
2447 rc
= do_probe_reset(ap
, softreset
, postreset
, classes
);
2453 * ata_dev_same_device - Determine whether new ID matches configured device
2454 * @ap: port on which the device to compare against resides
2455 * @dev: device to compare against
2456 * @new_class: class of the new device
2457 * @new_id: IDENTIFY page of the new device
2459 * Compare @new_class and @new_id against @dev and determine
2460 * whether @dev is the device indicated by @new_class and
2467 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
2469 static int ata_dev_same_device(struct ata_port
*ap
, struct ata_device
*dev
,
2470 unsigned int new_class
, const u16
*new_id
)
2472 const u16
*old_id
= dev
->id
;
2473 unsigned char model
[2][41], serial
[2][21];
2476 if (dev
->class != new_class
) {
2478 "ata%u: dev %u class mismatch %d != %d\n",
2479 ap
->id
, dev
->devno
, dev
->class, new_class
);
2483 ata_id_c_string(old_id
, model
[0], ATA_ID_PROD_OFS
, sizeof(model
[0]));
2484 ata_id_c_string(new_id
, model
[1], ATA_ID_PROD_OFS
, sizeof(model
[1]));
2485 ata_id_c_string(old_id
, serial
[0], ATA_ID_SERNO_OFS
, sizeof(serial
[0]));
2486 ata_id_c_string(new_id
, serial
[1], ATA_ID_SERNO_OFS
, sizeof(serial
[1]));
2487 new_n_sectors
= ata_id_n_sectors(new_id
);
2489 if (strcmp(model
[0], model
[1])) {
2491 "ata%u: dev %u model number mismatch '%s' != '%s'\n",
2492 ap
->id
, dev
->devno
, model
[0], model
[1]);
2496 if (strcmp(serial
[0], serial
[1])) {
2498 "ata%u: dev %u serial number mismatch '%s' != '%s'\n",
2499 ap
->id
, dev
->devno
, serial
[0], serial
[1]);
2503 if (dev
->class == ATA_DEV_ATA
&& dev
->n_sectors
!= new_n_sectors
) {
2505 "ata%u: dev %u n_sectors mismatch %llu != %llu\n",
2506 ap
->id
, dev
->devno
, (unsigned long long)dev
->n_sectors
,
2507 (unsigned long long)new_n_sectors
);
2515 * ata_dev_revalidate - Revalidate ATA device
2516 * @ap: port on which the device to revalidate resides
2517 * @dev: device to revalidate
2518 * @post_reset: is this revalidation after reset?
2520 * Re-read IDENTIFY page and make sure @dev is still attached to
2524 * Kernel thread context (may sleep)
2527 * 0 on success, negative errno otherwise
2529 int ata_dev_revalidate(struct ata_port
*ap
, struct ata_device
*dev
,
2536 if (!ata_dev_present(dev
))
2542 /* allocate & read ID data */
2543 rc
= ata_dev_read_id(ap
, dev
, &class, post_reset
, &id
);
2547 /* is the device still there? */
2548 if (!ata_dev_same_device(ap
, dev
, class, id
)) {
2556 /* configure device according to the new ID */
2557 return ata_dev_configure(ap
, dev
, 0);
2560 printk(KERN_ERR
"ata%u: dev %u revalidation failed (errno=%d)\n",
2561 ap
->id
, dev
->devno
, rc
);
2566 static const char * const ata_dma_blacklist
[] = {
2567 "WDC AC11000H", NULL
,
2568 "WDC AC22100H", NULL
,
2569 "WDC AC32500H", NULL
,
2570 "WDC AC33100H", NULL
,
2571 "WDC AC31600H", NULL
,
2572 "WDC AC32100H", "24.09P07",
2573 "WDC AC23200L", "21.10N21",
2574 "Compaq CRD-8241B", NULL
,
2579 "SanDisk SDP3B", NULL
,
2580 "SanDisk SDP3B-64", NULL
,
2581 "SANYO CD-ROM CRD", NULL
,
2582 "HITACHI CDR-8", NULL
,
2583 "HITACHI CDR-8335", NULL
,
2584 "HITACHI CDR-8435", NULL
,
2585 "Toshiba CD-ROM XM-6202B", NULL
,
2586 "TOSHIBA CD-ROM XM-1702BC", NULL
,
2588 "E-IDE CD-ROM CR-840", NULL
,
2589 "CD-ROM Drive/F5A", NULL
,
2590 "WPI CDD-820", NULL
,
2591 "SAMSUNG CD-ROM SC-148C", NULL
,
2592 "SAMSUNG CD-ROM SC", NULL
,
2593 "SanDisk SDP3B-64", NULL
,
2594 "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL
,
2595 "_NEC DV5800A", NULL
,
2596 "SAMSUNG CD-ROM SN-124", "N001"
2599 static int ata_strim(char *s
, size_t len
)
2601 len
= strnlen(s
, len
);
2603 /* ATAPI specifies that empty space is blank-filled; remove blanks */
2604 while ((len
> 0) && (s
[len
- 1] == ' ')) {
2611 static int ata_dma_blacklisted(const struct ata_device
*dev
)
2613 unsigned char model_num
[40];
2614 unsigned char model_rev
[16];
2615 unsigned int nlen
, rlen
;
2618 ata_id_string(dev
->id
, model_num
, ATA_ID_PROD_OFS
,
2620 ata_id_string(dev
->id
, model_rev
, ATA_ID_FW_REV_OFS
,
2622 nlen
= ata_strim(model_num
, sizeof(model_num
));
2623 rlen
= ata_strim(model_rev
, sizeof(model_rev
));
2625 for (i
= 0; i
< ARRAY_SIZE(ata_dma_blacklist
); i
+= 2) {
2626 if (!strncmp(ata_dma_blacklist
[i
], model_num
, nlen
)) {
2627 if (ata_dma_blacklist
[i
+1] == NULL
)
2629 if (!strncmp(ata_dma_blacklist
[i
], model_rev
, rlen
))
2637 * ata_dev_xfermask - Compute supported xfermask of the given device
2638 * @ap: Port on which the device to compute xfermask for resides
2639 * @dev: Device to compute xfermask for
2641 * Compute supported xfermask of @dev and store it in
2642 * dev->*_mask. This function is responsible for applying all
2643 * known limits including host controller limits, device
2649 static void ata_dev_xfermask(struct ata_port
*ap
, struct ata_device
*dev
)
2651 unsigned long xfer_mask
;
2654 xfer_mask
= ata_pack_xfermask(ap
->pio_mask
, ap
->mwdma_mask
,
2657 /* use port-wide xfermask for now */
2658 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
2659 struct ata_device
*d
= &ap
->device
[i
];
2660 if (!ata_dev_present(d
))
2662 xfer_mask
&= ata_pack_xfermask(d
->pio_mask
, d
->mwdma_mask
,
2664 xfer_mask
&= ata_id_xfermask(d
->id
);
2665 if (ata_dma_blacklisted(d
))
2666 xfer_mask
&= ~(ATA_MASK_MWDMA
| ATA_MASK_UDMA
);
2669 if (ata_dma_blacklisted(dev
))
2670 printk(KERN_WARNING
"ata%u: dev %u is on DMA blacklist, "
2671 "disabling DMA\n", ap
->id
, dev
->devno
);
2673 ata_unpack_xfermask(xfer_mask
, &dev
->pio_mask
, &dev
->mwdma_mask
,
2678 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
2679 * @ap: Port associated with device @dev
2680 * @dev: Device to which command will be sent
2682 * Issue SET FEATURES - XFER MODE command to device @dev
2686 * PCI/etc. bus probe sem.
2689 * 0 on success, AC_ERR_* mask otherwise.
2692 static unsigned int ata_dev_set_xfermode(struct ata_port
*ap
,
2693 struct ata_device
*dev
)
2695 struct ata_taskfile tf
;
2696 unsigned int err_mask
;
2698 /* set up set-features taskfile */
2699 DPRINTK("set features - xfer mode\n");
2701 ata_tf_init(ap
, &tf
, dev
->devno
);
2702 tf
.command
= ATA_CMD_SET_FEATURES
;
2703 tf
.feature
= SETFEATURES_XFER
;
2704 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
2705 tf
.protocol
= ATA_PROT_NODATA
;
2706 tf
.nsect
= dev
->xfer_mode
;
2708 err_mask
= ata_exec_internal(ap
, dev
, &tf
, DMA_NONE
, NULL
, 0);
2710 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
2715 * ata_dev_init_params - Issue INIT DEV PARAMS command
2716 * @ap: Port associated with device @dev
2717 * @dev: Device to which command will be sent
2720 * Kernel thread context (may sleep)
2723 * 0 on success, AC_ERR_* mask otherwise.
2726 static unsigned int ata_dev_init_params(struct ata_port
*ap
,
2727 struct ata_device
*dev
)
2729 struct ata_taskfile tf
;
2730 unsigned int err_mask
;
2731 u16 sectors
= dev
->id
[6];
2732 u16 heads
= dev
->id
[3];
2734 /* Number of sectors per track 1-255. Number of heads 1-16 */
2735 if (sectors
< 1 || sectors
> 255 || heads
< 1 || heads
> 16)
2738 /* set up init dev params taskfile */
2739 DPRINTK("init dev params \n");
2741 ata_tf_init(ap
, &tf
, dev
->devno
);
2742 tf
.command
= ATA_CMD_INIT_DEV_PARAMS
;
2743 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
2744 tf
.protocol
= ATA_PROT_NODATA
;
2746 tf
.device
|= (heads
- 1) & 0x0f; /* max head = num. of heads - 1 */
2748 err_mask
= ata_exec_internal(ap
, dev
, &tf
, DMA_NONE
, NULL
, 0);
2750 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
2755 * ata_sg_clean - Unmap DMA memory associated with command
2756 * @qc: Command containing DMA memory to be released
2758 * Unmap all mapped DMA memory associated with this command.
2761 * spin_lock_irqsave(host_set lock)
2764 static void ata_sg_clean(struct ata_queued_cmd
*qc
)
2766 struct ata_port
*ap
= qc
->ap
;
2767 struct scatterlist
*sg
= qc
->__sg
;
2768 int dir
= qc
->dma_dir
;
2769 void *pad_buf
= NULL
;
2771 WARN_ON(!(qc
->flags
& ATA_QCFLAG_DMAMAP
));
2772 WARN_ON(sg
== NULL
);
2774 if (qc
->flags
& ATA_QCFLAG_SINGLE
)
2775 WARN_ON(qc
->n_elem
> 1);
2777 VPRINTK("unmapping %u sg elements\n", qc
->n_elem
);
2779 /* if we padded the buffer out to 32-bit bound, and data
2780 * xfer direction is from-device, we must copy from the
2781 * pad buffer back into the supplied buffer
2783 if (qc
->pad_len
&& !(qc
->tf
.flags
& ATA_TFLAG_WRITE
))
2784 pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
2786 if (qc
->flags
& ATA_QCFLAG_SG
) {
2788 dma_unmap_sg(ap
->dev
, sg
, qc
->n_elem
, dir
);
2789 /* restore last sg */
2790 sg
[qc
->orig_n_elem
- 1].length
+= qc
->pad_len
;
2792 struct scatterlist
*psg
= &qc
->pad_sgent
;
2793 void *addr
= kmap_atomic(psg
->page
, KM_IRQ0
);
2794 memcpy(addr
+ psg
->offset
, pad_buf
, qc
->pad_len
);
2795 kunmap_atomic(addr
, KM_IRQ0
);
2799 dma_unmap_single(ap
->dev
,
2800 sg_dma_address(&sg
[0]), sg_dma_len(&sg
[0]),
2803 sg
->length
+= qc
->pad_len
;
2805 memcpy(qc
->buf_virt
+ sg
->length
- qc
->pad_len
,
2806 pad_buf
, qc
->pad_len
);
2809 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
2814 * ata_fill_sg - Fill PCI IDE PRD table
2815 * @qc: Metadata associated with taskfile to be transferred
2817 * Fill PCI IDE PRD (scatter-gather) table with segments
2818 * associated with the current disk command.
2821 * spin_lock_irqsave(host_set lock)
2824 static void ata_fill_sg(struct ata_queued_cmd
*qc
)
2826 struct ata_port
*ap
= qc
->ap
;
2827 struct scatterlist
*sg
;
2830 WARN_ON(qc
->__sg
== NULL
);
2831 WARN_ON(qc
->n_elem
== 0 && qc
->pad_len
== 0);
2834 ata_for_each_sg(sg
, qc
) {
2838 /* determine if physical DMA addr spans 64K boundary.
2839 * Note h/w doesn't support 64-bit, so we unconditionally
2840 * truncate dma_addr_t to u32.
2842 addr
= (u32
) sg_dma_address(sg
);
2843 sg_len
= sg_dma_len(sg
);
2846 offset
= addr
& 0xffff;
2848 if ((offset
+ sg_len
) > 0x10000)
2849 len
= 0x10000 - offset
;
2851 ap
->prd
[idx
].addr
= cpu_to_le32(addr
);
2852 ap
->prd
[idx
].flags_len
= cpu_to_le32(len
& 0xffff);
2853 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx
, addr
, len
);
2862 ap
->prd
[idx
- 1].flags_len
|= cpu_to_le32(ATA_PRD_EOT
);
2865 * ata_check_atapi_dma - Check whether ATAPI DMA can be supported
2866 * @qc: Metadata associated with taskfile to check
2868 * Allow low-level driver to filter ATA PACKET commands, returning
2869 * a status indicating whether or not it is OK to use DMA for the
2870 * supplied PACKET command.
2873 * spin_lock_irqsave(host_set lock)
2875 * RETURNS: 0 when ATAPI DMA can be used
2878 int ata_check_atapi_dma(struct ata_queued_cmd
*qc
)
2880 struct ata_port
*ap
= qc
->ap
;
2881 int rc
= 0; /* Assume ATAPI DMA is OK by default */
2883 if (ap
->ops
->check_atapi_dma
)
2884 rc
= ap
->ops
->check_atapi_dma(qc
);
2886 /* We don't support polling DMA.
2887 * Use PIO if the LLDD handles only interrupts in
2888 * the HSM_ST_LAST state and the ATAPI device
2889 * generates CDB interrupts.
2891 if ((ap
->flags
& ATA_FLAG_PIO_POLLING
) &&
2892 (qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
))
2898 * ata_qc_prep - Prepare taskfile for submission
2899 * @qc: Metadata associated with taskfile to be prepared
2901 * Prepare ATA taskfile for submission.
2904 * spin_lock_irqsave(host_set lock)
2906 void ata_qc_prep(struct ata_queued_cmd
*qc
)
2908 if (!(qc
->flags
& ATA_QCFLAG_DMAMAP
))
2914 void ata_noop_qc_prep(struct ata_queued_cmd
*qc
) { }
2917 * ata_sg_init_one - Associate command with memory buffer
2918 * @qc: Command to be associated
2919 * @buf: Memory buffer
2920 * @buflen: Length of memory buffer, in bytes.
2922 * Initialize the data-related elements of queued_cmd @qc
2923 * to point to a single memory buffer, @buf of byte length @buflen.
2926 * spin_lock_irqsave(host_set lock)
2929 void ata_sg_init_one(struct ata_queued_cmd
*qc
, void *buf
, unsigned int buflen
)
2931 struct scatterlist
*sg
;
2933 qc
->flags
|= ATA_QCFLAG_SINGLE
;
2935 memset(&qc
->sgent
, 0, sizeof(qc
->sgent
));
2936 qc
->__sg
= &qc
->sgent
;
2938 qc
->orig_n_elem
= 1;
2942 sg_init_one(sg
, buf
, buflen
);
2946 * ata_sg_init - Associate command with scatter-gather table.
2947 * @qc: Command to be associated
2948 * @sg: Scatter-gather table.
2949 * @n_elem: Number of elements in s/g table.
2951 * Initialize the data-related elements of queued_cmd @qc
2952 * to point to a scatter-gather table @sg, containing @n_elem
2956 * spin_lock_irqsave(host_set lock)
2959 void ata_sg_init(struct ata_queued_cmd
*qc
, struct scatterlist
*sg
,
2960 unsigned int n_elem
)
2962 qc
->flags
|= ATA_QCFLAG_SG
;
2964 qc
->n_elem
= n_elem
;
2965 qc
->orig_n_elem
= n_elem
;
2969 * ata_sg_setup_one - DMA-map the memory buffer associated with a command.
2970 * @qc: Command with memory buffer to be mapped.
2972 * DMA-map the memory buffer associated with queued_cmd @qc.
2975 * spin_lock_irqsave(host_set lock)
2978 * Zero on success, negative on error.
2981 static int ata_sg_setup_one(struct ata_queued_cmd
*qc
)
2983 struct ata_port
*ap
= qc
->ap
;
2984 int dir
= qc
->dma_dir
;
2985 struct scatterlist
*sg
= qc
->__sg
;
2986 dma_addr_t dma_address
;
2989 /* we must lengthen transfers to end on a 32-bit boundary */
2990 qc
->pad_len
= sg
->length
& 3;
2992 void *pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
2993 struct scatterlist
*psg
= &qc
->pad_sgent
;
2995 WARN_ON(qc
->dev
->class != ATA_DEV_ATAPI
);
2997 memset(pad_buf
, 0, ATA_DMA_PAD_SZ
);
2999 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
)
3000 memcpy(pad_buf
, qc
->buf_virt
+ sg
->length
- qc
->pad_len
,
3003 sg_dma_address(psg
) = ap
->pad_dma
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
3004 sg_dma_len(psg
) = ATA_DMA_PAD_SZ
;
3006 sg
->length
-= qc
->pad_len
;
3007 if (sg
->length
== 0)
3010 DPRINTK("padding done, sg->length=%u pad_len=%u\n",
3011 sg
->length
, qc
->pad_len
);
3019 dma_address
= dma_map_single(ap
->dev
, qc
->buf_virt
,
3021 if (dma_mapping_error(dma_address
)) {
3023 sg
->length
+= qc
->pad_len
;
3027 sg_dma_address(sg
) = dma_address
;
3028 sg_dma_len(sg
) = sg
->length
;
3031 DPRINTK("mapped buffer of %d bytes for %s\n", sg_dma_len(sg
),
3032 qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
3038 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
3039 * @qc: Command with scatter-gather table to be mapped.
3041 * DMA-map the scatter-gather table associated with queued_cmd @qc.
3044 * spin_lock_irqsave(host_set lock)
3047 * Zero on success, negative on error.
3051 static int ata_sg_setup(struct ata_queued_cmd
*qc
)
3053 struct ata_port
*ap
= qc
->ap
;
3054 struct scatterlist
*sg
= qc
->__sg
;
3055 struct scatterlist
*lsg
= &sg
[qc
->n_elem
- 1];
3056 int n_elem
, pre_n_elem
, dir
, trim_sg
= 0;
3058 VPRINTK("ENTER, ata%u\n", ap
->id
);
3059 WARN_ON(!(qc
->flags
& ATA_QCFLAG_SG
));
3061 /* we must lengthen transfers to end on a 32-bit boundary */
3062 qc
->pad_len
= lsg
->length
& 3;
3064 void *pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
3065 struct scatterlist
*psg
= &qc
->pad_sgent
;
3066 unsigned int offset
;
3068 WARN_ON(qc
->dev
->class != ATA_DEV_ATAPI
);
3070 memset(pad_buf
, 0, ATA_DMA_PAD_SZ
);
3073 * psg->page/offset are used to copy to-be-written
3074 * data in this function or read data in ata_sg_clean.
3076 offset
= lsg
->offset
+ lsg
->length
- qc
->pad_len
;
3077 psg
->page
= nth_page(lsg
->page
, offset
>> PAGE_SHIFT
);
3078 psg
->offset
= offset_in_page(offset
);
3080 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
) {
3081 void *addr
= kmap_atomic(psg
->page
, KM_IRQ0
);
3082 memcpy(pad_buf
, addr
+ psg
->offset
, qc
->pad_len
);
3083 kunmap_atomic(addr
, KM_IRQ0
);
3086 sg_dma_address(psg
) = ap
->pad_dma
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
3087 sg_dma_len(psg
) = ATA_DMA_PAD_SZ
;
3089 lsg
->length
-= qc
->pad_len
;
3090 if (lsg
->length
== 0)
3093 DPRINTK("padding done, sg[%d].length=%u pad_len=%u\n",
3094 qc
->n_elem
- 1, lsg
->length
, qc
->pad_len
);
3097 pre_n_elem
= qc
->n_elem
;
3098 if (trim_sg
&& pre_n_elem
)
3107 n_elem
= dma_map_sg(ap
->dev
, sg
, pre_n_elem
, dir
);
3109 /* restore last sg */
3110 lsg
->length
+= qc
->pad_len
;
3114 DPRINTK("%d sg elements mapped\n", n_elem
);
3117 qc
->n_elem
= n_elem
;
3123 * ata_poll_qc_complete - turn irq back on and finish qc
3124 * @qc: Command to complete
3125 * @err_mask: ATA status register content
3128 * None. (grabs host lock)
3131 void ata_poll_qc_complete(struct ata_queued_cmd
*qc
)
3133 struct ata_port
*ap
= qc
->ap
;
3134 unsigned long flags
;
3136 spin_lock_irqsave(&ap
->host_set
->lock
, flags
);
3138 ata_qc_complete(qc
);
3139 spin_unlock_irqrestore(&ap
->host_set
->lock
, flags
);
3143 * swap_buf_le16 - swap halves of 16-bit words in place
3144 * @buf: Buffer to swap
3145 * @buf_words: Number of 16-bit words in buffer.
3147 * Swap halves of 16-bit words if needed to convert from
3148 * little-endian byte order to native cpu byte order, or
3152 * Inherited from caller.
3154 void swap_buf_le16(u16
*buf
, unsigned int buf_words
)
3159 for (i
= 0; i
< buf_words
; i
++)
3160 buf
[i
] = le16_to_cpu(buf
[i
]);
3161 #endif /* __BIG_ENDIAN */
3165 * ata_mmio_data_xfer - Transfer data by MMIO
3166 * @ap: port to read/write
3168 * @buflen: buffer length
3169 * @write_data: read/write
3171 * Transfer data from/to the device data register by MMIO.
3174 * Inherited from caller.
3177 static void ata_mmio_data_xfer(struct ata_port
*ap
, unsigned char *buf
,
3178 unsigned int buflen
, int write_data
)
3181 unsigned int words
= buflen
>> 1;
3182 u16
*buf16
= (u16
*) buf
;
3183 void __iomem
*mmio
= (void __iomem
*)ap
->ioaddr
.data_addr
;
3185 /* Transfer multiple of 2 bytes */
3187 for (i
= 0; i
< words
; i
++)
3188 writew(le16_to_cpu(buf16
[i
]), mmio
);
3190 for (i
= 0; i
< words
; i
++)
3191 buf16
[i
] = cpu_to_le16(readw(mmio
));
3194 /* Transfer trailing 1 byte, if any. */
3195 if (unlikely(buflen
& 0x01)) {
3196 u16 align_buf
[1] = { 0 };
3197 unsigned char *trailing_buf
= buf
+ buflen
- 1;
3200 memcpy(align_buf
, trailing_buf
, 1);
3201 writew(le16_to_cpu(align_buf
[0]), mmio
);
3203 align_buf
[0] = cpu_to_le16(readw(mmio
));
3204 memcpy(trailing_buf
, align_buf
, 1);
3210 * ata_pio_data_xfer - Transfer data by PIO
3211 * @ap: port to read/write
3213 * @buflen: buffer length
3214 * @write_data: read/write
3216 * Transfer data from/to the device data register by PIO.
3219 * Inherited from caller.
3222 static void ata_pio_data_xfer(struct ata_port
*ap
, unsigned char *buf
,
3223 unsigned int buflen
, int write_data
)
3225 unsigned int words
= buflen
>> 1;
3227 /* Transfer multiple of 2 bytes */
3229 outsw(ap
->ioaddr
.data_addr
, buf
, words
);
3231 insw(ap
->ioaddr
.data_addr
, buf
, words
);
3233 /* Transfer trailing 1 byte, if any. */
3234 if (unlikely(buflen
& 0x01)) {
3235 u16 align_buf
[1] = { 0 };
3236 unsigned char *trailing_buf
= buf
+ buflen
- 1;
3239 memcpy(align_buf
, trailing_buf
, 1);
3240 outw(le16_to_cpu(align_buf
[0]), ap
->ioaddr
.data_addr
);
3242 align_buf
[0] = cpu_to_le16(inw(ap
->ioaddr
.data_addr
));
3243 memcpy(trailing_buf
, align_buf
, 1);
3249 * ata_data_xfer - Transfer data from/to the data register.
3250 * @ap: port to read/write
3252 * @buflen: buffer length
3253 * @do_write: read/write
3255 * Transfer data from/to the device data register.
3258 * Inherited from caller.
3261 static void ata_data_xfer(struct ata_port
*ap
, unsigned char *buf
,
3262 unsigned int buflen
, int do_write
)
3264 /* Make the crap hardware pay the costs not the good stuff */
3265 if (unlikely(ap
->flags
& ATA_FLAG_IRQ_MASK
)) {
3266 unsigned long flags
;
3267 local_irq_save(flags
);
3268 if (ap
->flags
& ATA_FLAG_MMIO
)
3269 ata_mmio_data_xfer(ap
, buf
, buflen
, do_write
);
3271 ata_pio_data_xfer(ap
, buf
, buflen
, do_write
);
3272 local_irq_restore(flags
);
3274 if (ap
->flags
& ATA_FLAG_MMIO
)
3275 ata_mmio_data_xfer(ap
, buf
, buflen
, do_write
);
3277 ata_pio_data_xfer(ap
, buf
, buflen
, do_write
);
3282 * ata_pio_sector - Transfer ATA_SECT_SIZE (512 bytes) of data.
3283 * @qc: Command on going
3285 * Transfer ATA_SECT_SIZE of data from/to the ATA device.
3288 * Inherited from caller.
3291 static void ata_pio_sector(struct ata_queued_cmd
*qc
)
3293 int do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
);
3294 struct scatterlist
*sg
= qc
->__sg
;
3295 struct ata_port
*ap
= qc
->ap
;
3297 unsigned int offset
;
3300 if (qc
->cursect
== (qc
->nsect
- 1))
3301 ap
->hsm_task_state
= HSM_ST_LAST
;
3303 page
= sg
[qc
->cursg
].page
;
3304 offset
= sg
[qc
->cursg
].offset
+ qc
->cursg_ofs
* ATA_SECT_SIZE
;
3306 /* get the current page and offset */
3307 page
= nth_page(page
, (offset
>> PAGE_SHIFT
));
3308 offset
%= PAGE_SIZE
;
3310 DPRINTK("data %s\n", qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
3312 if (PageHighMem(page
)) {
3313 unsigned long flags
;
3315 local_irq_save(flags
);
3316 buf
= kmap_atomic(page
, KM_IRQ0
);
3318 /* do the actual data transfer */
3319 ata_data_xfer(ap
, buf
+ offset
, ATA_SECT_SIZE
, do_write
);
3321 kunmap_atomic(buf
, KM_IRQ0
);
3322 local_irq_restore(flags
);
3324 buf
= page_address(page
);
3325 ata_data_xfer(ap
, buf
+ offset
, ATA_SECT_SIZE
, do_write
);
3331 if ((qc
->cursg_ofs
* ATA_SECT_SIZE
) == (&sg
[qc
->cursg
])->length
) {
3338 * ata_pio_sectors - Transfer one or many 512-byte sectors.
3339 * @qc: Command on going
3341 * Transfer one or many ATA_SECT_SIZE of data from/to the
3342 * ATA device for the DRQ request.
3345 * Inherited from caller.
3348 static void ata_pio_sectors(struct ata_queued_cmd
*qc
)
3350 if (is_multi_taskfile(&qc
->tf
)) {
3351 /* READ/WRITE MULTIPLE */
3354 WARN_ON(qc
->dev
->multi_count
== 0);
3356 nsect
= min(qc
->nsect
- qc
->cursect
, qc
->dev
->multi_count
);
3364 * atapi_send_cdb - Write CDB bytes to hardware
3365 * @ap: Port to which ATAPI device is attached.
3366 * @qc: Taskfile currently active
3368 * When device has indicated its readiness to accept
3369 * a CDB, this function is called. Send the CDB.
3375 static void atapi_send_cdb(struct ata_port
*ap
, struct ata_queued_cmd
*qc
)
3378 DPRINTK("send cdb\n");
3379 WARN_ON(qc
->dev
->cdb_len
< 12);
3381 ata_data_xfer(ap
, qc
->cdb
, qc
->dev
->cdb_len
, 1);
3382 ata_altstatus(ap
); /* flush */
3384 switch (qc
->tf
.protocol
) {
3385 case ATA_PROT_ATAPI
:
3386 ap
->hsm_task_state
= HSM_ST
;
3388 case ATA_PROT_ATAPI_NODATA
:
3389 ap
->hsm_task_state
= HSM_ST_LAST
;
3391 case ATA_PROT_ATAPI_DMA
:
3392 ap
->hsm_task_state
= HSM_ST_LAST
;
3393 /* initiate bmdma */
3394 ap
->ops
->bmdma_start(qc
);
3400 * __atapi_pio_bytes - Transfer data from/to the ATAPI device.
3401 * @qc: Command on going
3402 * @bytes: number of bytes
3404 * Transfer Transfer data from/to the ATAPI device.
3407 * Inherited from caller.
3411 static void __atapi_pio_bytes(struct ata_queued_cmd
*qc
, unsigned int bytes
)
3413 int do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
);
3414 struct scatterlist
*sg
= qc
->__sg
;
3415 struct ata_port
*ap
= qc
->ap
;
3418 unsigned int offset
, count
;
3420 if (qc
->curbytes
+ bytes
>= qc
->nbytes
)
3421 ap
->hsm_task_state
= HSM_ST_LAST
;
3424 if (unlikely(qc
->cursg
>= qc
->n_elem
)) {
3426 * The end of qc->sg is reached and the device expects
3427 * more data to transfer. In order not to overrun qc->sg
3428 * and fulfill length specified in the byte count register,
3429 * - for read case, discard trailing data from the device
3430 * - for write case, padding zero data to the device
3432 u16 pad_buf
[1] = { 0 };
3433 unsigned int words
= bytes
>> 1;
3436 if (words
) /* warning if bytes > 1 */
3437 printk(KERN_WARNING
"ata%u: %u bytes trailing data\n",
3440 for (i
= 0; i
< words
; i
++)
3441 ata_data_xfer(ap
, (unsigned char*)pad_buf
, 2, do_write
);
3443 ap
->hsm_task_state
= HSM_ST_LAST
;
3447 sg
= &qc
->__sg
[qc
->cursg
];
3450 offset
= sg
->offset
+ qc
->cursg_ofs
;
3452 /* get the current page and offset */
3453 page
= nth_page(page
, (offset
>> PAGE_SHIFT
));
3454 offset
%= PAGE_SIZE
;
3456 /* don't overrun current sg */
3457 count
= min(sg
->length
- qc
->cursg_ofs
, bytes
);
3459 /* don't cross page boundaries */
3460 count
= min(count
, (unsigned int)PAGE_SIZE
- offset
);
3462 DPRINTK("data %s\n", qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
3464 if (PageHighMem(page
)) {
3465 unsigned long flags
;
3467 local_irq_save(flags
);
3468 buf
= kmap_atomic(page
, KM_IRQ0
);
3470 /* do the actual data transfer */
3471 ata_data_xfer(ap
, buf
+ offset
, count
, do_write
);
3473 kunmap_atomic(buf
, KM_IRQ0
);
3474 local_irq_restore(flags
);
3476 buf
= page_address(page
);
3477 ata_data_xfer(ap
, buf
+ offset
, count
, do_write
);
3481 qc
->curbytes
+= count
;
3482 qc
->cursg_ofs
+= count
;
3484 if (qc
->cursg_ofs
== sg
->length
) {
3494 * atapi_pio_bytes - Transfer data from/to the ATAPI device.
3495 * @qc: Command on going
3497 * Transfer Transfer data from/to the ATAPI device.
3500 * Inherited from caller.
3503 static void atapi_pio_bytes(struct ata_queued_cmd
*qc
)
3505 struct ata_port
*ap
= qc
->ap
;
3506 struct ata_device
*dev
= qc
->dev
;
3507 unsigned int ireason
, bc_lo
, bc_hi
, bytes
;
3508 int i_write
, do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
) ? 1 : 0;
3510 ap
->ops
->tf_read(ap
, &qc
->tf
);
3511 ireason
= qc
->tf
.nsect
;
3512 bc_lo
= qc
->tf
.lbam
;
3513 bc_hi
= qc
->tf
.lbah
;
3514 bytes
= (bc_hi
<< 8) | bc_lo
;
3516 /* shall be cleared to zero, indicating xfer of data */
3517 if (ireason
& (1 << 0))
3520 /* make sure transfer direction matches expected */
3521 i_write
= ((ireason
& (1 << 1)) == 0) ? 1 : 0;
3522 if (do_write
!= i_write
)
3525 VPRINTK("ata%u: xfering %d bytes\n", ap
->id
, bytes
);
3527 __atapi_pio_bytes(qc
, bytes
);
3532 printk(KERN_INFO
"ata%u: dev %u: ATAPI check failed\n",
3533 ap
->id
, dev
->devno
);
3534 qc
->err_mask
|= AC_ERR_HSM
;
3535 ap
->hsm_task_state
= HSM_ST_ERR
;
3539 * ata_hsm_ok_in_wq - Check if the qc can be handled in the workqueue.
3540 * @ap: the target ata_port
3544 * 1 if ok in workqueue, 0 otherwise.
3547 static inline int ata_hsm_ok_in_wq(struct ata_port
*ap
, struct ata_queued_cmd
*qc
)
3549 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
3552 if (ap
->hsm_task_state
== HSM_ST_FIRST
) {
3553 if (qc
->tf
.protocol
== ATA_PROT_PIO
&&
3554 (qc
->tf
.flags
& ATA_TFLAG_WRITE
))
3557 if (is_atapi_taskfile(&qc
->tf
) &&
3558 !(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
))
3566 * ata_hsm_move - move the HSM to the next state.
3567 * @ap: the target ata_port
3569 * @status: current device status
3570 * @in_wq: 1 if called from workqueue, 0 otherwise
3573 * 1 when poll next status needed, 0 otherwise.
3576 static int ata_hsm_move(struct ata_port
*ap
, struct ata_queued_cmd
*qc
,
3577 u8 status
, int in_wq
)
3579 unsigned long flags
= 0;
3582 WARN_ON((qc
->flags
& ATA_QCFLAG_ACTIVE
) == 0);
3584 /* Make sure ata_qc_issue_prot() does not throw things
3585 * like DMA polling into the workqueue. Notice that
3586 * in_wq is not equivalent to (qc->tf.flags & ATA_TFLAG_POLLING).
3588 WARN_ON(in_wq
!= ata_hsm_ok_in_wq(ap
, qc
));
3591 if (unlikely(status
& (ATA_ERR
| ATA_DF
))) {
3592 qc
->err_mask
|= AC_ERR_DEV
;
3593 ap
->hsm_task_state
= HSM_ST_ERR
;
3597 DPRINTK("ata%u: protocol %d task_state %d (dev_stat 0x%X)\n",
3598 ap
->id
, qc
->tf
.protocol
, ap
->hsm_task_state
, status
);
3600 switch (ap
->hsm_task_state
) {
3602 /* Send first data block or PACKET CDB */
3604 /* If polling, we will stay in the work queue after
3605 * sending the data. Otherwise, interrupt handler
3606 * takes over after sending the data.
3608 poll_next
= (qc
->tf
.flags
& ATA_TFLAG_POLLING
);
3610 /* check device status */
3611 if (unlikely((status
& (ATA_BUSY
| ATA_DRQ
)) != ATA_DRQ
)) {
3612 /* Wrong status. Let EH handle this */
3613 qc
->err_mask
|= AC_ERR_HSM
;
3614 ap
->hsm_task_state
= HSM_ST_ERR
;
3618 /* Send the CDB (atapi) or the first data block (ata pio out).
3619 * During the state transition, interrupt handler shouldn't
3620 * be invoked before the data transfer is complete and
3621 * hsm_task_state is changed. Hence, the following locking.
3624 spin_lock_irqsave(&ap
->host_set
->lock
, flags
);
3626 if (qc
->tf
.protocol
== ATA_PROT_PIO
) {
3627 /* PIO data out protocol.
3628 * send first data block.
3631 /* ata_pio_sectors() might change the state
3632 * to HSM_ST_LAST. so, the state is changed here
3633 * before ata_pio_sectors().
3635 ap
->hsm_task_state
= HSM_ST
;
3636 ata_pio_sectors(qc
);
3637 ata_altstatus(ap
); /* flush */
3640 atapi_send_cdb(ap
, qc
);
3643 spin_unlock_irqrestore(&ap
->host_set
->lock
, flags
);
3645 /* if polling, ata_pio_task() handles the rest.
3646 * otherwise, interrupt handler takes over from here.
3651 /* complete command or read/write the data register */
3652 if (qc
->tf
.protocol
== ATA_PROT_ATAPI
) {
3653 /* ATAPI PIO protocol */
3654 if ((status
& ATA_DRQ
) == 0) {
3655 /* no more data to transfer */
3656 ap
->hsm_task_state
= HSM_ST_LAST
;
3660 atapi_pio_bytes(qc
);
3662 if (unlikely(ap
->hsm_task_state
== HSM_ST_ERR
))
3663 /* bad ireason reported by device */
3667 /* ATA PIO protocol */
3668 if (unlikely((status
& ATA_DRQ
) == 0)) {
3669 /* handle BSY=0, DRQ=0 as error */
3670 qc
->err_mask
|= AC_ERR_HSM
;
3671 ap
->hsm_task_state
= HSM_ST_ERR
;
3675 ata_pio_sectors(qc
);
3677 if (ap
->hsm_task_state
== HSM_ST_LAST
&&
3678 (!(qc
->tf
.flags
& ATA_TFLAG_WRITE
))) {
3681 status
= ata_chk_status(ap
);
3686 ata_altstatus(ap
); /* flush */
3691 if (unlikely(!ata_ok(status
))) {
3692 qc
->err_mask
|= __ac_err_mask(status
);
3693 ap
->hsm_task_state
= HSM_ST_ERR
;
3697 /* no more data to transfer */
3698 DPRINTK("ata%u: command complete, drv_stat 0x%x\n",
3701 WARN_ON(qc
->err_mask
);
3703 ap
->hsm_task_state
= HSM_ST_IDLE
;
3705 /* complete taskfile transaction */
3707 ata_poll_qc_complete(qc
);
3709 ata_qc_complete(qc
);
3715 if (qc
->tf
.command
!= ATA_CMD_PACKET
)
3716 printk(KERN_ERR
"ata%u: command error, drv_stat 0x%x\n",
3719 /* make sure qc->err_mask is available to
3720 * know what's wrong and recover
3722 WARN_ON(qc
->err_mask
== 0);
3724 ap
->hsm_task_state
= HSM_ST_IDLE
;
3726 /* complete taskfile transaction */
3728 ata_poll_qc_complete(qc
);
3730 ata_qc_complete(qc
);
3742 static void ata_pio_task(void *_data
)
3744 struct ata_port
*ap
= _data
;
3745 struct ata_queued_cmd
*qc
;
3750 WARN_ON(ap
->hsm_task_state
== HSM_ST_IDLE
);
3752 qc
= ata_qc_from_tag(ap
, ap
->active_tag
);
3753 WARN_ON(qc
== NULL
);
3756 * This is purely heuristic. This is a fast path.
3757 * Sometimes when we enter, BSY will be cleared in
3758 * a chk-status or two. If not, the drive is probably seeking
3759 * or something. Snooze for a couple msecs, then
3760 * chk-status again. If still busy, queue delayed work.
3762 status
= ata_busy_wait(ap
, ATA_BUSY
, 5);
3763 if (status
& ATA_BUSY
) {
3765 status
= ata_busy_wait(ap
, ATA_BUSY
, 10);
3766 if (status
& ATA_BUSY
) {
3767 ata_port_queue_task(ap
, ata_pio_task
, ap
, ATA_SHORT_PAUSE
);
3773 poll_next
= ata_hsm_move(ap
, qc
, status
, 1);
3775 /* another command or interrupt handler
3776 * may be running at this point.
3783 * ata_qc_timeout - Handle timeout of queued command
3784 * @qc: Command that timed out
3786 * Some part of the kernel (currently, only the SCSI layer)
3787 * has noticed that the active command on port @ap has not
3788 * completed after a specified length of time. Handle this
3789 * condition by disabling DMA (if necessary) and completing
3790 * transactions, with error if necessary.
3792 * This also handles the case of the "lost interrupt", where
3793 * for some reason (possibly hardware bug, possibly driver bug)
3794 * an interrupt was not delivered to the driver, even though the
3795 * transaction completed successfully.
3798 * Inherited from SCSI layer (none, can sleep)
3801 static void ata_qc_timeout(struct ata_queued_cmd
*qc
)
3803 struct ata_port
*ap
= qc
->ap
;
3804 struct ata_host_set
*host_set
= ap
->host_set
;
3805 u8 host_stat
= 0, drv_stat
;
3806 unsigned long flags
;
3810 ap
->hsm_task_state
= HSM_ST_IDLE
;
3812 spin_lock_irqsave(&host_set
->lock
, flags
);
3814 switch (qc
->tf
.protocol
) {
3817 case ATA_PROT_ATAPI_DMA
:
3818 host_stat
= ap
->ops
->bmdma_status(ap
);
3820 /* before we do anything else, clear DMA-Start bit */
3821 ap
->ops
->bmdma_stop(qc
);
3827 drv_stat
= ata_chk_status(ap
);
3829 /* ack bmdma irq events */
3830 ap
->ops
->irq_clear(ap
);
3832 printk(KERN_ERR
"ata%u: command 0x%x timeout, stat 0x%x host_stat 0x%x\n",
3833 ap
->id
, qc
->tf
.command
, drv_stat
, host_stat
);
3835 ap
->hsm_task_state
= HSM_ST_IDLE
;
3837 /* complete taskfile transaction */
3838 qc
->err_mask
|= AC_ERR_TIMEOUT
;
3842 spin_unlock_irqrestore(&host_set
->lock
, flags
);
3844 ata_eh_qc_complete(qc
);
3850 * ata_eng_timeout - Handle timeout of queued command
3851 * @ap: Port on which timed-out command is active
3853 * Some part of the kernel (currently, only the SCSI layer)
3854 * has noticed that the active command on port @ap has not
3855 * completed after a specified length of time. Handle this
3856 * condition by disabling DMA (if necessary) and completing
3857 * transactions, with error if necessary.
3859 * This also handles the case of the "lost interrupt", where
3860 * for some reason (possibly hardware bug, possibly driver bug)
3861 * an interrupt was not delivered to the driver, even though the
3862 * transaction completed successfully.
3865 * Inherited from SCSI layer (none, can sleep)
3868 void ata_eng_timeout(struct ata_port
*ap
)
3872 ata_qc_timeout(ata_qc_from_tag(ap
, ap
->active_tag
));
3878 * ata_qc_new - Request an available ATA command, for queueing
3879 * @ap: Port associated with device @dev
3880 * @dev: Device from whom we request an available command structure
3886 static struct ata_queued_cmd
*ata_qc_new(struct ata_port
*ap
)
3888 struct ata_queued_cmd
*qc
= NULL
;
3891 for (i
= 0; i
< ATA_MAX_QUEUE
; i
++)
3892 if (!test_and_set_bit(i
, &ap
->qactive
)) {
3893 qc
= ata_qc_from_tag(ap
, i
);
3904 * ata_qc_new_init - Request an available ATA command, and initialize it
3905 * @ap: Port associated with device @dev
3906 * @dev: Device from whom we request an available command structure
3912 struct ata_queued_cmd
*ata_qc_new_init(struct ata_port
*ap
,
3913 struct ata_device
*dev
)
3915 struct ata_queued_cmd
*qc
;
3917 qc
= ata_qc_new(ap
);
3930 * ata_qc_free - free unused ata_queued_cmd
3931 * @qc: Command to complete
3933 * Designed to free unused ata_queued_cmd object
3934 * in case something prevents using it.
3937 * spin_lock_irqsave(host_set lock)
3939 void ata_qc_free(struct ata_queued_cmd
*qc
)
3941 struct ata_port
*ap
= qc
->ap
;
3944 WARN_ON(qc
== NULL
); /* ata_qc_from_tag _might_ return NULL */
3948 if (likely(ata_tag_valid(tag
))) {
3949 if (tag
== ap
->active_tag
)
3950 ap
->active_tag
= ATA_TAG_POISON
;
3951 qc
->tag
= ATA_TAG_POISON
;
3952 clear_bit(tag
, &ap
->qactive
);
3956 void __ata_qc_complete(struct ata_queued_cmd
*qc
)
3958 WARN_ON(qc
== NULL
); /* ata_qc_from_tag _might_ return NULL */
3959 WARN_ON(!(qc
->flags
& ATA_QCFLAG_ACTIVE
));
3961 if (likely(qc
->flags
& ATA_QCFLAG_DMAMAP
))
3964 /* atapi: mark qc as inactive to prevent the interrupt handler
3965 * from completing the command twice later, before the error handler
3966 * is called. (when rc != 0 and atapi request sense is needed)
3968 qc
->flags
&= ~ATA_QCFLAG_ACTIVE
;
3970 /* call completion callback */
3971 qc
->complete_fn(qc
);
3974 static inline int ata_should_dma_map(struct ata_queued_cmd
*qc
)
3976 struct ata_port
*ap
= qc
->ap
;
3978 switch (qc
->tf
.protocol
) {
3980 case ATA_PROT_ATAPI_DMA
:
3983 case ATA_PROT_ATAPI
:
3985 if (ap
->flags
& ATA_FLAG_PIO_DMA
)
3998 * ata_qc_issue - issue taskfile to device
3999 * @qc: command to issue to device
4001 * Prepare an ATA command to submission to device.
4002 * This includes mapping the data into a DMA-able
4003 * area, filling in the S/G table, and finally
4004 * writing the taskfile to hardware, starting the command.
4007 * spin_lock_irqsave(host_set lock)
4010 * Zero on success, AC_ERR_* mask on failure
4013 unsigned int ata_qc_issue(struct ata_queued_cmd
*qc
)
4015 struct ata_port
*ap
= qc
->ap
;
4017 if (ata_should_dma_map(qc
)) {
4018 if (qc
->flags
& ATA_QCFLAG_SG
) {
4019 if (ata_sg_setup(qc
))
4021 } else if (qc
->flags
& ATA_QCFLAG_SINGLE
) {
4022 if (ata_sg_setup_one(qc
))
4026 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
4029 ap
->ops
->qc_prep(qc
);
4031 qc
->ap
->active_tag
= qc
->tag
;
4032 qc
->flags
|= ATA_QCFLAG_ACTIVE
;
4034 return ap
->ops
->qc_issue(qc
);
4037 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
4038 return AC_ERR_SYSTEM
;
4043 * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner
4044 * @qc: command to issue to device
4046 * Using various libata functions and hooks, this function
4047 * starts an ATA command. ATA commands are grouped into
4048 * classes called "protocols", and issuing each type of protocol
4049 * is slightly different.
4051 * May be used as the qc_issue() entry in ata_port_operations.
4054 * spin_lock_irqsave(host_set lock)
4057 * Zero on success, AC_ERR_* mask on failure
4060 unsigned int ata_qc_issue_prot(struct ata_queued_cmd
*qc
)
4062 struct ata_port
*ap
= qc
->ap
;
4064 /* Use polling pio if the LLD doesn't handle
4065 * interrupt driven pio and atapi CDB interrupt.
4067 if (ap
->flags
& ATA_FLAG_PIO_POLLING
) {
4068 switch (qc
->tf
.protocol
) {
4070 case ATA_PROT_ATAPI
:
4071 case ATA_PROT_ATAPI_NODATA
:
4072 qc
->tf
.flags
|= ATA_TFLAG_POLLING
;
4074 case ATA_PROT_ATAPI_DMA
:
4075 if (qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
)
4076 /* see ata_check_atapi_dma() */
4084 /* select the device */
4085 ata_dev_select(ap
, qc
->dev
->devno
, 1, 0);
4087 /* start the command */
4088 switch (qc
->tf
.protocol
) {
4089 case ATA_PROT_NODATA
:
4090 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
4091 ata_qc_set_polling(qc
);
4093 ata_tf_to_host(ap
, &qc
->tf
);
4094 ap
->hsm_task_state
= HSM_ST_LAST
;
4096 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
4097 ata_port_queue_task(ap
, ata_pio_task
, ap
, 0);
4102 WARN_ON(qc
->tf
.flags
& ATA_TFLAG_POLLING
);
4104 ap
->ops
->tf_load(ap
, &qc
->tf
); /* load tf registers */
4105 ap
->ops
->bmdma_setup(qc
); /* set up bmdma */
4106 ap
->ops
->bmdma_start(qc
); /* initiate bmdma */
4107 ap
->hsm_task_state
= HSM_ST_LAST
;
4111 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
4112 ata_qc_set_polling(qc
);
4114 ata_tf_to_host(ap
, &qc
->tf
);
4116 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
) {
4117 /* PIO data out protocol */
4118 ap
->hsm_task_state
= HSM_ST_FIRST
;
4119 ata_port_queue_task(ap
, ata_pio_task
, ap
, 0);
4121 /* always send first data block using
4122 * the ata_pio_task() codepath.
4125 /* PIO data in protocol */
4126 ap
->hsm_task_state
= HSM_ST
;
4128 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
4129 ata_port_queue_task(ap
, ata_pio_task
, ap
, 0);
4131 /* if polling, ata_pio_task() handles the rest.
4132 * otherwise, interrupt handler takes over from here.
4138 case ATA_PROT_ATAPI
:
4139 case ATA_PROT_ATAPI_NODATA
:
4140 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
4141 ata_qc_set_polling(qc
);
4143 ata_tf_to_host(ap
, &qc
->tf
);
4145 ap
->hsm_task_state
= HSM_ST_FIRST
;
4147 /* send cdb by polling if no cdb interrupt */
4148 if ((!(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
)) ||
4149 (qc
->tf
.flags
& ATA_TFLAG_POLLING
))
4150 ata_port_queue_task(ap
, ata_pio_task
, ap
, 0);
4153 case ATA_PROT_ATAPI_DMA
:
4154 WARN_ON(qc
->tf
.flags
& ATA_TFLAG_POLLING
);
4156 ap
->ops
->tf_load(ap
, &qc
->tf
); /* load tf registers */
4157 ap
->ops
->bmdma_setup(qc
); /* set up bmdma */
4158 ap
->hsm_task_state
= HSM_ST_FIRST
;
4160 /* send cdb by polling if no cdb interrupt */
4161 if (!(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
))
4162 ata_port_queue_task(ap
, ata_pio_task
, ap
, 0);
4167 return AC_ERR_SYSTEM
;
4174 * ata_host_intr - Handle host interrupt for given (port, task)
4175 * @ap: Port on which interrupt arrived (possibly...)
4176 * @qc: Taskfile currently active in engine
4178 * Handle host interrupt for given queued command. Currently,
4179 * only DMA interrupts are handled. All other commands are
4180 * handled via polling with interrupts disabled (nIEN bit).
4183 * spin_lock_irqsave(host_set lock)
4186 * One if interrupt was handled, zero if not (shared irq).
4189 inline unsigned int ata_host_intr (struct ata_port
*ap
,
4190 struct ata_queued_cmd
*qc
)
4192 u8 status
, host_stat
= 0;
4194 VPRINTK("ata%u: protocol %d task_state %d\n",
4195 ap
->id
, qc
->tf
.protocol
, ap
->hsm_task_state
);
4197 /* Check whether we are expecting interrupt in this state */
4198 switch (ap
->hsm_task_state
) {
4200 /* Some pre-ATAPI-4 devices assert INTRQ
4201 * at this state when ready to receive CDB.
4204 /* Check the ATA_DFLAG_CDB_INTR flag is enough here.
4205 * The flag was turned on only for atapi devices.
4206 * No need to check is_atapi_taskfile(&qc->tf) again.
4208 if (!(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
))
4212 if (qc
->tf
.protocol
== ATA_PROT_DMA
||
4213 qc
->tf
.protocol
== ATA_PROT_ATAPI_DMA
) {
4214 /* check status of DMA engine */
4215 host_stat
= ap
->ops
->bmdma_status(ap
);
4216 VPRINTK("ata%u: host_stat 0x%X\n", ap
->id
, host_stat
);
4218 /* if it's not our irq... */
4219 if (!(host_stat
& ATA_DMA_INTR
))
4222 /* before we do anything else, clear DMA-Start bit */
4223 ap
->ops
->bmdma_stop(qc
);
4225 if (unlikely(host_stat
& ATA_DMA_ERR
)) {
4226 /* error when transfering data to/from memory */
4227 qc
->err_mask
|= AC_ERR_HOST_BUS
;
4228 ap
->hsm_task_state
= HSM_ST_ERR
;
4238 /* check altstatus */
4239 status
= ata_altstatus(ap
);
4240 if (status
& ATA_BUSY
)
4243 /* check main status, clearing INTRQ */
4244 status
= ata_chk_status(ap
);
4245 if (unlikely(status
& ATA_BUSY
))
4248 /* ack bmdma irq events */
4249 ap
->ops
->irq_clear(ap
);
4251 ata_hsm_move(ap
, qc
, status
, 0);
4252 return 1; /* irq handled */
4255 ap
->stats
.idle_irq
++;
4258 if ((ap
->stats
.idle_irq
% 1000) == 0) {
4259 ata_irq_ack(ap
, 0); /* debug trap */
4260 printk(KERN_WARNING
"ata%d: irq trap\n", ap
->id
);
4264 return 0; /* irq not handled */
4268 * ata_interrupt - Default ATA host interrupt handler
4269 * @irq: irq line (unused)
4270 * @dev_instance: pointer to our ata_host_set information structure
4273 * Default interrupt handler for PCI IDE devices. Calls
4274 * ata_host_intr() for each port that is not disabled.
4277 * Obtains host_set lock during operation.
4280 * IRQ_NONE or IRQ_HANDLED.
4283 irqreturn_t
ata_interrupt (int irq
, void *dev_instance
, struct pt_regs
*regs
)
4285 struct ata_host_set
*host_set
= dev_instance
;
4287 unsigned int handled
= 0;
4288 unsigned long flags
;
4290 /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */
4291 spin_lock_irqsave(&host_set
->lock
, flags
);
4293 for (i
= 0; i
< host_set
->n_ports
; i
++) {
4294 struct ata_port
*ap
;
4296 ap
= host_set
->ports
[i
];
4298 !(ap
->flags
& ATA_FLAG_PORT_DISABLED
)) {
4299 struct ata_queued_cmd
*qc
;
4301 qc
= ata_qc_from_tag(ap
, ap
->active_tag
);
4302 if (qc
&& (!(qc
->tf
.flags
& ATA_TFLAG_POLLING
)) &&
4303 (qc
->flags
& ATA_QCFLAG_ACTIVE
))
4304 handled
|= ata_host_intr(ap
, qc
);
4308 spin_unlock_irqrestore(&host_set
->lock
, flags
);
4310 return IRQ_RETVAL(handled
);
4315 * Execute a 'simple' command, that only consists of the opcode 'cmd' itself,
4316 * without filling any other registers
4318 static int ata_do_simple_cmd(struct ata_port
*ap
, struct ata_device
*dev
,
4321 struct ata_taskfile tf
;
4324 ata_tf_init(ap
, &tf
, dev
->devno
);
4327 tf
.flags
|= ATA_TFLAG_DEVICE
;
4328 tf
.protocol
= ATA_PROT_NODATA
;
4330 err
= ata_exec_internal(ap
, dev
, &tf
, DMA_NONE
, NULL
, 0);
4332 printk(KERN_ERR
"%s: ata command failed: %d\n",
4338 static int ata_flush_cache(struct ata_port
*ap
, struct ata_device
*dev
)
4342 if (!ata_try_flush_cache(dev
))
4345 if (ata_id_has_flush_ext(dev
->id
))
4346 cmd
= ATA_CMD_FLUSH_EXT
;
4348 cmd
= ATA_CMD_FLUSH
;
4350 return ata_do_simple_cmd(ap
, dev
, cmd
);
4353 static int ata_standby_drive(struct ata_port
*ap
, struct ata_device
*dev
)
4355 return ata_do_simple_cmd(ap
, dev
, ATA_CMD_STANDBYNOW1
);
4358 static int ata_start_drive(struct ata_port
*ap
, struct ata_device
*dev
)
4360 return ata_do_simple_cmd(ap
, dev
, ATA_CMD_IDLEIMMEDIATE
);
4364 * ata_device_resume - wakeup a previously suspended devices
4365 * @ap: port the device is connected to
4366 * @dev: the device to resume
4368 * Kick the drive back into action, by sending it an idle immediate
4369 * command and making sure its transfer mode matches between drive
4373 int ata_device_resume(struct ata_port
*ap
, struct ata_device
*dev
)
4375 if (ap
->flags
& ATA_FLAG_SUSPENDED
) {
4376 ap
->flags
&= ~ATA_FLAG_SUSPENDED
;
4379 if (!ata_dev_present(dev
))
4381 if (dev
->class == ATA_DEV_ATA
)
4382 ata_start_drive(ap
, dev
);
4388 * ata_device_suspend - prepare a device for suspend
4389 * @ap: port the device is connected to
4390 * @dev: the device to suspend
4392 * Flush the cache on the drive, if appropriate, then issue a
4393 * standbynow command.
4395 int ata_device_suspend(struct ata_port
*ap
, struct ata_device
*dev
, pm_message_t state
)
4397 if (!ata_dev_present(dev
))
4399 if (dev
->class == ATA_DEV_ATA
)
4400 ata_flush_cache(ap
, dev
);
4402 if (state
.event
!= PM_EVENT_FREEZE
)
4403 ata_standby_drive(ap
, dev
);
4404 ap
->flags
|= ATA_FLAG_SUSPENDED
;
4409 * ata_port_start - Set port up for dma.
4410 * @ap: Port to initialize
4412 * Called just after data structures for each port are
4413 * initialized. Allocates space for PRD table.
4415 * May be used as the port_start() entry in ata_port_operations.
4418 * Inherited from caller.
4421 int ata_port_start (struct ata_port
*ap
)
4423 struct device
*dev
= ap
->dev
;
4426 ap
->prd
= dma_alloc_coherent(dev
, ATA_PRD_TBL_SZ
, &ap
->prd_dma
, GFP_KERNEL
);
4430 rc
= ata_pad_alloc(ap
, dev
);
4432 dma_free_coherent(dev
, ATA_PRD_TBL_SZ
, ap
->prd
, ap
->prd_dma
);
4436 DPRINTK("prd alloc, virt %p, dma %llx\n", ap
->prd
, (unsigned long long) ap
->prd_dma
);
4443 * ata_port_stop - Undo ata_port_start()
4444 * @ap: Port to shut down
4446 * Frees the PRD table.
4448 * May be used as the port_stop() entry in ata_port_operations.
4451 * Inherited from caller.
4454 void ata_port_stop (struct ata_port
*ap
)
4456 struct device
*dev
= ap
->dev
;
4458 dma_free_coherent(dev
, ATA_PRD_TBL_SZ
, ap
->prd
, ap
->prd_dma
);
4459 ata_pad_free(ap
, dev
);
4462 void ata_host_stop (struct ata_host_set
*host_set
)
4464 if (host_set
->mmio_base
)
4465 iounmap(host_set
->mmio_base
);
4470 * ata_host_remove - Unregister SCSI host structure with upper layers
4471 * @ap: Port to unregister
4472 * @do_unregister: 1 if we fully unregister, 0 to just stop the port
4475 * Inherited from caller.
4478 static void ata_host_remove(struct ata_port
*ap
, unsigned int do_unregister
)
4480 struct Scsi_Host
*sh
= ap
->host
;
4485 scsi_remove_host(sh
);
4487 ap
->ops
->port_stop(ap
);
4491 * ata_host_init - Initialize an ata_port structure
4492 * @ap: Structure to initialize
4493 * @host: associated SCSI mid-layer structure
4494 * @host_set: Collection of hosts to which @ap belongs
4495 * @ent: Probe information provided by low-level driver
4496 * @port_no: Port number associated with this ata_port
4498 * Initialize a new ata_port structure, and its associated
4502 * Inherited from caller.
4505 static void ata_host_init(struct ata_port
*ap
, struct Scsi_Host
*host
,
4506 struct ata_host_set
*host_set
,
4507 const struct ata_probe_ent
*ent
, unsigned int port_no
)
4513 host
->max_channel
= 1;
4514 host
->unique_id
= ata_unique_id
++;
4515 host
->max_cmd_len
= 12;
4517 ap
->flags
= ATA_FLAG_PORT_DISABLED
;
4518 ap
->id
= host
->unique_id
;
4520 ap
->ctl
= ATA_DEVCTL_OBS
;
4521 ap
->host_set
= host_set
;
4523 ap
->port_no
= port_no
;
4525 ent
->legacy_mode
? ent
->hard_port_no
: port_no
;
4526 ap
->pio_mask
= ent
->pio_mask
;
4527 ap
->mwdma_mask
= ent
->mwdma_mask
;
4528 ap
->udma_mask
= ent
->udma_mask
;
4529 ap
->flags
|= ent
->host_flags
;
4530 ap
->ops
= ent
->port_ops
;
4531 ap
->cbl
= ATA_CBL_NONE
;
4532 ap
->active_tag
= ATA_TAG_POISON
;
4533 ap
->last_ctl
= 0xFF;
4535 INIT_WORK(&ap
->port_task
, NULL
, NULL
);
4536 INIT_LIST_HEAD(&ap
->eh_done_q
);
4538 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
4539 struct ata_device
*dev
= &ap
->device
[i
];
4541 dev
->pio_mask
= UINT_MAX
;
4542 dev
->mwdma_mask
= UINT_MAX
;
4543 dev
->udma_mask
= UINT_MAX
;
4547 ap
->stats
.unhandled_irq
= 1;
4548 ap
->stats
.idle_irq
= 1;
4551 memcpy(&ap
->ioaddr
, &ent
->port
[port_no
], sizeof(struct ata_ioports
));
4555 * ata_host_add - Attach low-level ATA driver to system
4556 * @ent: Information provided by low-level driver
4557 * @host_set: Collections of ports to which we add
4558 * @port_no: Port number associated with this host
4560 * Attach low-level ATA driver to system.
4563 * PCI/etc. bus probe sem.
4566 * New ata_port on success, for NULL on error.
4569 static struct ata_port
* ata_host_add(const struct ata_probe_ent
*ent
,
4570 struct ata_host_set
*host_set
,
4571 unsigned int port_no
)
4573 struct Scsi_Host
*host
;
4574 struct ata_port
*ap
;
4579 if (!ent
->port_ops
->probe_reset
&&
4580 !(ent
->host_flags
& (ATA_FLAG_SATA_RESET
| ATA_FLAG_SRST
))) {
4581 printk(KERN_ERR
"ata%u: no reset mechanism available\n",
4586 host
= scsi_host_alloc(ent
->sht
, sizeof(struct ata_port
));
4590 host
->transportt
= &ata_scsi_transport_template
;
4592 ap
= (struct ata_port
*) &host
->hostdata
[0];
4594 ata_host_init(ap
, host
, host_set
, ent
, port_no
);
4596 rc
= ap
->ops
->port_start(ap
);
4603 scsi_host_put(host
);
4608 * ata_device_add - Register hardware device with ATA and SCSI layers
4609 * @ent: Probe information describing hardware device to be registered
4611 * This function processes the information provided in the probe
4612 * information struct @ent, allocates the necessary ATA and SCSI
4613 * host information structures, initializes them, and registers
4614 * everything with requisite kernel subsystems.
4616 * This function requests irqs, probes the ATA bus, and probes
4620 * PCI/etc. bus probe sem.
4623 * Number of ports registered. Zero on error (no ports registered).
4626 int ata_device_add(const struct ata_probe_ent
*ent
)
4628 unsigned int count
= 0, i
;
4629 struct device
*dev
= ent
->dev
;
4630 struct ata_host_set
*host_set
;
4633 /* alloc a container for our list of ATA ports (buses) */
4634 host_set
= kzalloc(sizeof(struct ata_host_set
) +
4635 (ent
->n_ports
* sizeof(void *)), GFP_KERNEL
);
4638 spin_lock_init(&host_set
->lock
);
4640 host_set
->dev
= dev
;
4641 host_set
->n_ports
= ent
->n_ports
;
4642 host_set
->irq
= ent
->irq
;
4643 host_set
->mmio_base
= ent
->mmio_base
;
4644 host_set
->private_data
= ent
->private_data
;
4645 host_set
->ops
= ent
->port_ops
;
4647 /* register each port bound to this device */
4648 for (i
= 0; i
< ent
->n_ports
; i
++) {
4649 struct ata_port
*ap
;
4650 unsigned long xfer_mode_mask
;
4652 ap
= ata_host_add(ent
, host_set
, i
);
4656 host_set
->ports
[i
] = ap
;
4657 xfer_mode_mask
=(ap
->udma_mask
<< ATA_SHIFT_UDMA
) |
4658 (ap
->mwdma_mask
<< ATA_SHIFT_MWDMA
) |
4659 (ap
->pio_mask
<< ATA_SHIFT_PIO
);
4661 /* print per-port info to dmesg */
4662 printk(KERN_INFO
"ata%u: %cATA max %s cmd 0x%lX ctl 0x%lX "
4663 "bmdma 0x%lX irq %lu\n",
4665 ap
->flags
& ATA_FLAG_SATA
? 'S' : 'P',
4666 ata_mode_string(xfer_mode_mask
),
4667 ap
->ioaddr
.cmd_addr
,
4668 ap
->ioaddr
.ctl_addr
,
4669 ap
->ioaddr
.bmdma_addr
,
4673 host_set
->ops
->irq_clear(ap
);
4680 /* obtain irq, that is shared between channels */
4681 if (request_irq(ent
->irq
, ent
->port_ops
->irq_handler
, ent
->irq_flags
,
4682 DRV_NAME
, host_set
))
4685 /* perform each probe synchronously */
4686 DPRINTK("probe begin\n");
4687 for (i
= 0; i
< count
; i
++) {
4688 struct ata_port
*ap
;
4691 ap
= host_set
->ports
[i
];
4693 DPRINTK("ata%u: bus probe begin\n", ap
->id
);
4694 rc
= ata_bus_probe(ap
);
4695 DPRINTK("ata%u: bus probe end\n", ap
->id
);
4698 /* FIXME: do something useful here?
4699 * Current libata behavior will
4700 * tear down everything when
4701 * the module is removed
4702 * or the h/w is unplugged.
4706 rc
= scsi_add_host(ap
->host
, dev
);
4708 printk(KERN_ERR
"ata%u: scsi_add_host failed\n",
4710 /* FIXME: do something useful here */
4711 /* FIXME: handle unconditional calls to
4712 * scsi_scan_host and ata_host_remove, below,
4718 /* probes are done, now scan each port's disk(s) */
4719 DPRINTK("host probe begin\n");
4720 for (i
= 0; i
< count
; i
++) {
4721 struct ata_port
*ap
= host_set
->ports
[i
];
4723 ata_scsi_scan_host(ap
);
4726 dev_set_drvdata(dev
, host_set
);
4728 VPRINTK("EXIT, returning %u\n", ent
->n_ports
);
4729 return ent
->n_ports
; /* success */
4732 for (i
= 0; i
< count
; i
++) {
4733 ata_host_remove(host_set
->ports
[i
], 1);
4734 scsi_host_put(host_set
->ports
[i
]->host
);
4738 VPRINTK("EXIT, returning 0\n");
4743 * ata_host_set_remove - PCI layer callback for device removal
4744 * @host_set: ATA host set that was removed
4746 * Unregister all objects associated with this host set. Free those
4750 * Inherited from calling layer (may sleep).
4753 void ata_host_set_remove(struct ata_host_set
*host_set
)
4755 struct ata_port
*ap
;
4758 for (i
= 0; i
< host_set
->n_ports
; i
++) {
4759 ap
= host_set
->ports
[i
];
4760 scsi_remove_host(ap
->host
);
4763 free_irq(host_set
->irq
, host_set
);
4765 for (i
= 0; i
< host_set
->n_ports
; i
++) {
4766 ap
= host_set
->ports
[i
];
4768 ata_scsi_release(ap
->host
);
4770 if ((ap
->flags
& ATA_FLAG_NO_LEGACY
) == 0) {
4771 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
4773 if (ioaddr
->cmd_addr
== 0x1f0)
4774 release_region(0x1f0, 8);
4775 else if (ioaddr
->cmd_addr
== 0x170)
4776 release_region(0x170, 8);
4779 scsi_host_put(ap
->host
);
4782 if (host_set
->ops
->host_stop
)
4783 host_set
->ops
->host_stop(host_set
);
4789 * ata_scsi_release - SCSI layer callback hook for host unload
4790 * @host: libata host to be unloaded
4792 * Performs all duties necessary to shut down a libata port...
4793 * Kill port kthread, disable port, and release resources.
4796 * Inherited from SCSI layer.
4802 int ata_scsi_release(struct Scsi_Host
*host
)
4804 struct ata_port
*ap
= (struct ata_port
*) &host
->hostdata
[0];
4809 ap
->ops
->port_disable(ap
);
4810 ata_host_remove(ap
, 0);
4811 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
4812 kfree(ap
->device
[i
].id
);
4819 * ata_std_ports - initialize ioaddr with standard port offsets.
4820 * @ioaddr: IO address structure to be initialized
4822 * Utility function which initializes data_addr, error_addr,
4823 * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr,
4824 * device_addr, status_addr, and command_addr to standard offsets
4825 * relative to cmd_addr.
4827 * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr.
4830 void ata_std_ports(struct ata_ioports
*ioaddr
)
4832 ioaddr
->data_addr
= ioaddr
->cmd_addr
+ ATA_REG_DATA
;
4833 ioaddr
->error_addr
= ioaddr
->cmd_addr
+ ATA_REG_ERR
;
4834 ioaddr
->feature_addr
= ioaddr
->cmd_addr
+ ATA_REG_FEATURE
;
4835 ioaddr
->nsect_addr
= ioaddr
->cmd_addr
+ ATA_REG_NSECT
;
4836 ioaddr
->lbal_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAL
;
4837 ioaddr
->lbam_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAM
;
4838 ioaddr
->lbah_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAH
;
4839 ioaddr
->device_addr
= ioaddr
->cmd_addr
+ ATA_REG_DEVICE
;
4840 ioaddr
->status_addr
= ioaddr
->cmd_addr
+ ATA_REG_STATUS
;
4841 ioaddr
->command_addr
= ioaddr
->cmd_addr
+ ATA_REG_CMD
;
4847 void ata_pci_host_stop (struct ata_host_set
*host_set
)
4849 struct pci_dev
*pdev
= to_pci_dev(host_set
->dev
);
4851 pci_iounmap(pdev
, host_set
->mmio_base
);
4855 * ata_pci_remove_one - PCI layer callback for device removal
4856 * @pdev: PCI device that was removed
4858 * PCI layer indicates to libata via this hook that
4859 * hot-unplug or module unload event has occurred.
4860 * Handle this by unregistering all objects associated
4861 * with this PCI device. Free those objects. Then finally
4862 * release PCI resources and disable device.
4865 * Inherited from PCI layer (may sleep).
4868 void ata_pci_remove_one (struct pci_dev
*pdev
)
4870 struct device
*dev
= pci_dev_to_dev(pdev
);
4871 struct ata_host_set
*host_set
= dev_get_drvdata(dev
);
4873 ata_host_set_remove(host_set
);
4874 pci_release_regions(pdev
);
4875 pci_disable_device(pdev
);
4876 dev_set_drvdata(dev
, NULL
);
4879 /* move to PCI subsystem */
4880 int pci_test_config_bits(struct pci_dev
*pdev
, const struct pci_bits
*bits
)
4882 unsigned long tmp
= 0;
4884 switch (bits
->width
) {
4887 pci_read_config_byte(pdev
, bits
->reg
, &tmp8
);
4893 pci_read_config_word(pdev
, bits
->reg
, &tmp16
);
4899 pci_read_config_dword(pdev
, bits
->reg
, &tmp32
);
4910 return (tmp
== bits
->val
) ? 1 : 0;
4913 int ata_pci_device_suspend(struct pci_dev
*pdev
, pm_message_t state
)
4915 pci_save_state(pdev
);
4916 pci_disable_device(pdev
);
4917 pci_set_power_state(pdev
, PCI_D3hot
);
4921 int ata_pci_device_resume(struct pci_dev
*pdev
)
4923 pci_set_power_state(pdev
, PCI_D0
);
4924 pci_restore_state(pdev
);
4925 pci_enable_device(pdev
);
4926 pci_set_master(pdev
);
4929 #endif /* CONFIG_PCI */
4932 static int __init
ata_init(void)
4934 ata_wq
= create_workqueue("ata");
4938 printk(KERN_DEBUG
"libata version " DRV_VERSION
" loaded.\n");
4942 static void __exit
ata_exit(void)
4944 destroy_workqueue(ata_wq
);
4947 module_init(ata_init
);
4948 module_exit(ata_exit
);
4950 static unsigned long ratelimit_time
;
4951 static spinlock_t ata_ratelimit_lock
= SPIN_LOCK_UNLOCKED
;
4953 int ata_ratelimit(void)
4956 unsigned long flags
;
4958 spin_lock_irqsave(&ata_ratelimit_lock
, flags
);
4960 if (time_after(jiffies
, ratelimit_time
)) {
4962 ratelimit_time
= jiffies
+ (HZ
/5);
4966 spin_unlock_irqrestore(&ata_ratelimit_lock
, flags
);
4972 * libata is essentially a library of internal helper functions for
4973 * low-level ATA host controller drivers. As such, the API/ABI is
4974 * likely to change as new drivers are added and updated.
4975 * Do not depend on ABI/API stability.
4978 EXPORT_SYMBOL_GPL(ata_std_bios_param
);
4979 EXPORT_SYMBOL_GPL(ata_std_ports
);
4980 EXPORT_SYMBOL_GPL(ata_device_add
);
4981 EXPORT_SYMBOL_GPL(ata_host_set_remove
);
4982 EXPORT_SYMBOL_GPL(ata_sg_init
);
4983 EXPORT_SYMBOL_GPL(ata_sg_init_one
);
4984 EXPORT_SYMBOL_GPL(__ata_qc_complete
);
4985 EXPORT_SYMBOL_GPL(ata_qc_issue_prot
);
4986 EXPORT_SYMBOL_GPL(ata_eng_timeout
);
4987 EXPORT_SYMBOL_GPL(ata_tf_load
);
4988 EXPORT_SYMBOL_GPL(ata_tf_read
);
4989 EXPORT_SYMBOL_GPL(ata_noop_dev_select
);
4990 EXPORT_SYMBOL_GPL(ata_std_dev_select
);
4991 EXPORT_SYMBOL_GPL(ata_tf_to_fis
);
4992 EXPORT_SYMBOL_GPL(ata_tf_from_fis
);
4993 EXPORT_SYMBOL_GPL(ata_check_status
);
4994 EXPORT_SYMBOL_GPL(ata_altstatus
);
4995 EXPORT_SYMBOL_GPL(ata_exec_command
);
4996 EXPORT_SYMBOL_GPL(ata_port_start
);
4997 EXPORT_SYMBOL_GPL(ata_port_stop
);
4998 EXPORT_SYMBOL_GPL(ata_host_stop
);
4999 EXPORT_SYMBOL_GPL(ata_interrupt
);
5000 EXPORT_SYMBOL_GPL(ata_qc_prep
);
5001 EXPORT_SYMBOL_GPL(ata_noop_qc_prep
);
5002 EXPORT_SYMBOL_GPL(ata_bmdma_setup
);
5003 EXPORT_SYMBOL_GPL(ata_bmdma_start
);
5004 EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear
);
5005 EXPORT_SYMBOL_GPL(ata_bmdma_status
);
5006 EXPORT_SYMBOL_GPL(ata_bmdma_stop
);
5007 EXPORT_SYMBOL_GPL(ata_port_probe
);
5008 EXPORT_SYMBOL_GPL(sata_phy_reset
);
5009 EXPORT_SYMBOL_GPL(__sata_phy_reset
);
5010 EXPORT_SYMBOL_GPL(ata_bus_reset
);
5011 EXPORT_SYMBOL_GPL(ata_std_probeinit
);
5012 EXPORT_SYMBOL_GPL(ata_std_softreset
);
5013 EXPORT_SYMBOL_GPL(sata_std_hardreset
);
5014 EXPORT_SYMBOL_GPL(ata_std_postreset
);
5015 EXPORT_SYMBOL_GPL(ata_std_probe_reset
);
5016 EXPORT_SYMBOL_GPL(ata_drive_probe_reset
);
5017 EXPORT_SYMBOL_GPL(ata_dev_revalidate
);
5018 EXPORT_SYMBOL_GPL(ata_dev_classify
);
5019 EXPORT_SYMBOL_GPL(ata_dev_pair
);
5020 EXPORT_SYMBOL_GPL(ata_port_disable
);
5021 EXPORT_SYMBOL_GPL(ata_ratelimit
);
5022 EXPORT_SYMBOL_GPL(ata_busy_sleep
);
5023 EXPORT_SYMBOL_GPL(ata_port_queue_task
);
5024 EXPORT_SYMBOL_GPL(ata_scsi_ioctl
);
5025 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd
);
5026 EXPORT_SYMBOL_GPL(ata_scsi_error
);
5027 EXPORT_SYMBOL_GPL(ata_scsi_slave_config
);
5028 EXPORT_SYMBOL_GPL(ata_scsi_release
);
5029 EXPORT_SYMBOL_GPL(ata_host_intr
);
5030 EXPORT_SYMBOL_GPL(ata_id_string
);
5031 EXPORT_SYMBOL_GPL(ata_id_c_string
);
5032 EXPORT_SYMBOL_GPL(ata_scsi_simulate
);
5033 EXPORT_SYMBOL_GPL(ata_eh_qc_complete
);
5034 EXPORT_SYMBOL_GPL(ata_eh_qc_retry
);
5036 EXPORT_SYMBOL_GPL(ata_pio_need_iordy
);
5037 EXPORT_SYMBOL_GPL(ata_timing_compute
);
5038 EXPORT_SYMBOL_GPL(ata_timing_merge
);
5041 EXPORT_SYMBOL_GPL(pci_test_config_bits
);
5042 EXPORT_SYMBOL_GPL(ata_pci_host_stop
);
5043 EXPORT_SYMBOL_GPL(ata_pci_init_native_mode
);
5044 EXPORT_SYMBOL_GPL(ata_pci_init_one
);
5045 EXPORT_SYMBOL_GPL(ata_pci_remove_one
);
5046 EXPORT_SYMBOL_GPL(ata_pci_device_suspend
);
5047 EXPORT_SYMBOL_GPL(ata_pci_device_resume
);
5048 EXPORT_SYMBOL_GPL(ata_pci_default_filter
);
5049 EXPORT_SYMBOL_GPL(ata_pci_clear_simplex
);
5050 #endif /* CONFIG_PCI */
5052 EXPORT_SYMBOL_GPL(ata_device_suspend
);
5053 EXPORT_SYMBOL_GPL(ata_device_resume
);
5054 EXPORT_SYMBOL_GPL(ata_scsi_device_suspend
);
5055 EXPORT_SYMBOL_GPL(ata_scsi_device_resume
);