2 * libata-core.c - helper library for ATA
4 * Maintained by: Jeff Garzik <jgarzik@pobox.com>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
8 * Copyright 2003-2004 Red Hat, Inc. All rights reserved.
9 * Copyright 2003-2004 Jeff Garzik
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2, or (at your option)
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; see the file COPYING. If not, write to
24 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
27 * libata documentation is available via 'make {ps|pdf}docs',
28 * as Documentation/DocBook/libata.*
30 * Hardware documentation available from http://www.t13.org/ and
31 * http://www.sata-io.org/
35 #include <linux/config.h>
36 #include <linux/kernel.h>
37 #include <linux/module.h>
38 #include <linux/pci.h>
39 #include <linux/init.h>
40 #include <linux/list.h>
42 #include <linux/highmem.h>
43 #include <linux/spinlock.h>
44 #include <linux/blkdev.h>
45 #include <linux/delay.h>
46 #include <linux/timer.h>
47 #include <linux/interrupt.h>
48 #include <linux/completion.h>
49 #include <linux/suspend.h>
50 #include <linux/workqueue.h>
51 #include <linux/jiffies.h>
52 #include <linux/scatterlist.h>
53 #include <scsi/scsi.h>
54 #include "scsi_priv.h"
55 #include <scsi/scsi_cmnd.h>
56 #include <scsi/scsi_host.h>
57 #include <linux/libata.h>
59 #include <asm/semaphore.h>
60 #include <asm/byteorder.h>
64 static unsigned int ata_dev_init_params(struct ata_port
*ap
,
65 struct ata_device
*dev
,
68 static unsigned int ata_dev_set_xfermode(struct ata_port
*ap
,
69 struct ata_device
*dev
);
70 static void ata_dev_xfermask(struct ata_port
*ap
, struct ata_device
*dev
);
72 static unsigned int ata_unique_id
= 1;
73 static struct workqueue_struct
*ata_wq
;
75 int atapi_enabled
= 1;
76 module_param(atapi_enabled
, int, 0444);
77 MODULE_PARM_DESC(atapi_enabled
, "Enable discovery of ATAPI devices (0=off, 1=on)");
80 module_param(atapi_dmadir
, int, 0444);
81 MODULE_PARM_DESC(atapi_dmadir
, "Enable ATAPI DMADIR bridge support (0=off, 1=on)");
84 module_param_named(fua
, libata_fua
, int, 0444);
85 MODULE_PARM_DESC(fua
, "FUA support (0=off, 1=on)");
87 MODULE_AUTHOR("Jeff Garzik");
88 MODULE_DESCRIPTION("Library module for ATA devices");
89 MODULE_LICENSE("GPL");
90 MODULE_VERSION(DRV_VERSION
);
94 * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure
95 * @tf: Taskfile to convert
96 * @fis: Buffer into which data will output
97 * @pmp: Port multiplier port
99 * Converts a standard ATA taskfile to a Serial ATA
100 * FIS structure (Register - Host to Device).
103 * Inherited from caller.
106 void ata_tf_to_fis(const struct ata_taskfile
*tf
, u8
*fis
, u8 pmp
)
108 fis
[0] = 0x27; /* Register - Host to Device FIS */
109 fis
[1] = (pmp
& 0xf) | (1 << 7); /* Port multiplier number,
110 bit 7 indicates Command FIS */
111 fis
[2] = tf
->command
;
112 fis
[3] = tf
->feature
;
119 fis
[8] = tf
->hob_lbal
;
120 fis
[9] = tf
->hob_lbam
;
121 fis
[10] = tf
->hob_lbah
;
122 fis
[11] = tf
->hob_feature
;
125 fis
[13] = tf
->hob_nsect
;
136 * ata_tf_from_fis - Convert SATA FIS to ATA taskfile
137 * @fis: Buffer from which data will be input
138 * @tf: Taskfile to output
140 * Converts a serial ATA FIS structure to a standard ATA taskfile.
143 * Inherited from caller.
146 void ata_tf_from_fis(const u8
*fis
, struct ata_taskfile
*tf
)
148 tf
->command
= fis
[2]; /* status */
149 tf
->feature
= fis
[3]; /* error */
156 tf
->hob_lbal
= fis
[8];
157 tf
->hob_lbam
= fis
[9];
158 tf
->hob_lbah
= fis
[10];
161 tf
->hob_nsect
= fis
[13];
164 static const u8 ata_rw_cmds
[] = {
168 ATA_CMD_READ_MULTI_EXT
,
169 ATA_CMD_WRITE_MULTI_EXT
,
173 ATA_CMD_WRITE_MULTI_FUA_EXT
,
177 ATA_CMD_PIO_READ_EXT
,
178 ATA_CMD_PIO_WRITE_EXT
,
191 ATA_CMD_WRITE_FUA_EXT
195 * ata_rwcmd_protocol - set taskfile r/w commands and protocol
196 * @qc: command to examine and configure
198 * Examine the device configuration and tf->flags to calculate
199 * the proper read/write commands and protocol to use.
204 int ata_rwcmd_protocol(struct ata_queued_cmd
*qc
)
206 struct ata_taskfile
*tf
= &qc
->tf
;
207 struct ata_device
*dev
= qc
->dev
;
210 int index
, fua
, lba48
, write
;
212 fua
= (tf
->flags
& ATA_TFLAG_FUA
) ? 4 : 0;
213 lba48
= (tf
->flags
& ATA_TFLAG_LBA48
) ? 2 : 0;
214 write
= (tf
->flags
& ATA_TFLAG_WRITE
) ? 1 : 0;
216 if (dev
->flags
& ATA_DFLAG_PIO
) {
217 tf
->protocol
= ATA_PROT_PIO
;
218 index
= dev
->multi_count
? 0 : 8;
219 } else if (lba48
&& (qc
->ap
->flags
& ATA_FLAG_PIO_LBA48
)) {
220 /* Unable to use DMA due to host limitation */
221 tf
->protocol
= ATA_PROT_PIO
;
222 index
= dev
->multi_count
? 0 : 8;
224 tf
->protocol
= ATA_PROT_DMA
;
228 cmd
= ata_rw_cmds
[index
+ fua
+ lba48
+ write
];
237 * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask
238 * @pio_mask: pio_mask
239 * @mwdma_mask: mwdma_mask
240 * @udma_mask: udma_mask
242 * Pack @pio_mask, @mwdma_mask and @udma_mask into a single
243 * unsigned int xfer_mask.
251 static unsigned int ata_pack_xfermask(unsigned int pio_mask
,
252 unsigned int mwdma_mask
,
253 unsigned int udma_mask
)
255 return ((pio_mask
<< ATA_SHIFT_PIO
) & ATA_MASK_PIO
) |
256 ((mwdma_mask
<< ATA_SHIFT_MWDMA
) & ATA_MASK_MWDMA
) |
257 ((udma_mask
<< ATA_SHIFT_UDMA
) & ATA_MASK_UDMA
);
261 * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks
262 * @xfer_mask: xfer_mask to unpack
263 * @pio_mask: resulting pio_mask
264 * @mwdma_mask: resulting mwdma_mask
265 * @udma_mask: resulting udma_mask
267 * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask.
268 * Any NULL distination masks will be ignored.
270 static void ata_unpack_xfermask(unsigned int xfer_mask
,
271 unsigned int *pio_mask
,
272 unsigned int *mwdma_mask
,
273 unsigned int *udma_mask
)
276 *pio_mask
= (xfer_mask
& ATA_MASK_PIO
) >> ATA_SHIFT_PIO
;
278 *mwdma_mask
= (xfer_mask
& ATA_MASK_MWDMA
) >> ATA_SHIFT_MWDMA
;
280 *udma_mask
= (xfer_mask
& ATA_MASK_UDMA
) >> ATA_SHIFT_UDMA
;
283 static const struct ata_xfer_ent
{
287 { ATA_SHIFT_PIO
, ATA_BITS_PIO
, XFER_PIO_0
},
288 { ATA_SHIFT_MWDMA
, ATA_BITS_MWDMA
, XFER_MW_DMA_0
},
289 { ATA_SHIFT_UDMA
, ATA_BITS_UDMA
, XFER_UDMA_0
},
294 * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask
295 * @xfer_mask: xfer_mask of interest
297 * Return matching XFER_* value for @xfer_mask. Only the highest
298 * bit of @xfer_mask is considered.
304 * Matching XFER_* value, 0 if no match found.
306 static u8
ata_xfer_mask2mode(unsigned int xfer_mask
)
308 int highbit
= fls(xfer_mask
) - 1;
309 const struct ata_xfer_ent
*ent
;
311 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
312 if (highbit
>= ent
->shift
&& highbit
< ent
->shift
+ ent
->bits
)
313 return ent
->base
+ highbit
- ent
->shift
;
318 * ata_xfer_mode2mask - Find matching xfer_mask for XFER_*
319 * @xfer_mode: XFER_* of interest
321 * Return matching xfer_mask for @xfer_mode.
327 * Matching xfer_mask, 0 if no match found.
329 static unsigned int ata_xfer_mode2mask(u8 xfer_mode
)
331 const struct ata_xfer_ent
*ent
;
333 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
334 if (xfer_mode
>= ent
->base
&& xfer_mode
< ent
->base
+ ent
->bits
)
335 return 1 << (ent
->shift
+ xfer_mode
- ent
->base
);
340 * ata_xfer_mode2shift - Find matching xfer_shift for XFER_*
341 * @xfer_mode: XFER_* of interest
343 * Return matching xfer_shift for @xfer_mode.
349 * Matching xfer_shift, -1 if no match found.
351 static int ata_xfer_mode2shift(unsigned int xfer_mode
)
353 const struct ata_xfer_ent
*ent
;
355 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
356 if (xfer_mode
>= ent
->base
&& xfer_mode
< ent
->base
+ ent
->bits
)
362 * ata_mode_string - convert xfer_mask to string
363 * @xfer_mask: mask of bits supported; only highest bit counts.
365 * Determine string which represents the highest speed
366 * (highest bit in @modemask).
372 * Constant C string representing highest speed listed in
373 * @mode_mask, or the constant C string "<n/a>".
375 static const char *ata_mode_string(unsigned int xfer_mask
)
377 static const char * const xfer_mode_str
[] = {
397 highbit
= fls(xfer_mask
) - 1;
398 if (highbit
>= 0 && highbit
< ARRAY_SIZE(xfer_mode_str
))
399 return xfer_mode_str
[highbit
];
403 static const char *sata_spd_string(unsigned int spd
)
405 static const char * const spd_str
[] = {
410 if (spd
== 0 || (spd
- 1) >= ARRAY_SIZE(spd_str
))
412 return spd_str
[spd
- 1];
415 void ata_dev_disable(struct ata_port
*ap
, struct ata_device
*dev
)
417 if (ata_dev_enabled(dev
)) {
418 printk(KERN_WARNING
"ata%u: dev %u disabled\n",
425 * ata_pio_devchk - PATA device presence detection
426 * @ap: ATA channel to examine
427 * @device: Device to examine (starting at zero)
429 * This technique was originally described in
430 * Hale Landis's ATADRVR (www.ata-atapi.com), and
431 * later found its way into the ATA/ATAPI spec.
433 * Write a pattern to the ATA shadow registers,
434 * and if a device is present, it will respond by
435 * correctly storing and echoing back the
436 * ATA shadow register contents.
442 static unsigned int ata_pio_devchk(struct ata_port
*ap
,
445 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
448 ap
->ops
->dev_select(ap
, device
);
450 outb(0x55, ioaddr
->nsect_addr
);
451 outb(0xaa, ioaddr
->lbal_addr
);
453 outb(0xaa, ioaddr
->nsect_addr
);
454 outb(0x55, ioaddr
->lbal_addr
);
456 outb(0x55, ioaddr
->nsect_addr
);
457 outb(0xaa, ioaddr
->lbal_addr
);
459 nsect
= inb(ioaddr
->nsect_addr
);
460 lbal
= inb(ioaddr
->lbal_addr
);
462 if ((nsect
== 0x55) && (lbal
== 0xaa))
463 return 1; /* we found a device */
465 return 0; /* nothing found */
469 * ata_mmio_devchk - PATA device presence detection
470 * @ap: ATA channel to examine
471 * @device: Device to examine (starting at zero)
473 * This technique was originally described in
474 * Hale Landis's ATADRVR (www.ata-atapi.com), and
475 * later found its way into the ATA/ATAPI spec.
477 * Write a pattern to the ATA shadow registers,
478 * and if a device is present, it will respond by
479 * correctly storing and echoing back the
480 * ATA shadow register contents.
486 static unsigned int ata_mmio_devchk(struct ata_port
*ap
,
489 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
492 ap
->ops
->dev_select(ap
, device
);
494 writeb(0x55, (void __iomem
*) ioaddr
->nsect_addr
);
495 writeb(0xaa, (void __iomem
*) ioaddr
->lbal_addr
);
497 writeb(0xaa, (void __iomem
*) ioaddr
->nsect_addr
);
498 writeb(0x55, (void __iomem
*) ioaddr
->lbal_addr
);
500 writeb(0x55, (void __iomem
*) ioaddr
->nsect_addr
);
501 writeb(0xaa, (void __iomem
*) ioaddr
->lbal_addr
);
503 nsect
= readb((void __iomem
*) ioaddr
->nsect_addr
);
504 lbal
= readb((void __iomem
*) ioaddr
->lbal_addr
);
506 if ((nsect
== 0x55) && (lbal
== 0xaa))
507 return 1; /* we found a device */
509 return 0; /* nothing found */
513 * ata_devchk - PATA device presence detection
514 * @ap: ATA channel to examine
515 * @device: Device to examine (starting at zero)
517 * Dispatch ATA device presence detection, depending
518 * on whether we are using PIO or MMIO to talk to the
519 * ATA shadow registers.
525 static unsigned int ata_devchk(struct ata_port
*ap
,
528 if (ap
->flags
& ATA_FLAG_MMIO
)
529 return ata_mmio_devchk(ap
, device
);
530 return ata_pio_devchk(ap
, device
);
534 * ata_dev_classify - determine device type based on ATA-spec signature
535 * @tf: ATA taskfile register set for device to be identified
537 * Determine from taskfile register contents whether a device is
538 * ATA or ATAPI, as per "Signature and persistence" section
539 * of ATA/PI spec (volume 1, sect 5.14).
545 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, or %ATA_DEV_UNKNOWN
546 * the event of failure.
549 unsigned int ata_dev_classify(const struct ata_taskfile
*tf
)
551 /* Apple's open source Darwin code hints that some devices only
552 * put a proper signature into the LBA mid/high registers,
553 * So, we only check those. It's sufficient for uniqueness.
556 if (((tf
->lbam
== 0) && (tf
->lbah
== 0)) ||
557 ((tf
->lbam
== 0x3c) && (tf
->lbah
== 0xc3))) {
558 DPRINTK("found ATA device by sig\n");
562 if (((tf
->lbam
== 0x14) && (tf
->lbah
== 0xeb)) ||
563 ((tf
->lbam
== 0x69) && (tf
->lbah
== 0x96))) {
564 DPRINTK("found ATAPI device by sig\n");
565 return ATA_DEV_ATAPI
;
568 DPRINTK("unknown device\n");
569 return ATA_DEV_UNKNOWN
;
573 * ata_dev_try_classify - Parse returned ATA device signature
574 * @ap: ATA channel to examine
575 * @device: Device to examine (starting at zero)
576 * @r_err: Value of error register on completion
578 * After an event -- SRST, E.D.D., or SATA COMRESET -- occurs,
579 * an ATA/ATAPI-defined set of values is placed in the ATA
580 * shadow registers, indicating the results of device detection
583 * Select the ATA device, and read the values from the ATA shadow
584 * registers. Then parse according to the Error register value,
585 * and the spec-defined values examined by ata_dev_classify().
591 * Device type - %ATA_DEV_ATA, %ATA_DEV_ATAPI or %ATA_DEV_NONE.
595 ata_dev_try_classify(struct ata_port
*ap
, unsigned int device
, u8
*r_err
)
597 struct ata_taskfile tf
;
601 ap
->ops
->dev_select(ap
, device
);
603 memset(&tf
, 0, sizeof(tf
));
605 ap
->ops
->tf_read(ap
, &tf
);
610 /* see if device passed diags */
613 else if ((device
== 0) && (err
== 0x81))
618 /* determine if device is ATA or ATAPI */
619 class = ata_dev_classify(&tf
);
621 if (class == ATA_DEV_UNKNOWN
)
623 if ((class == ATA_DEV_ATA
) && (ata_chk_status(ap
) == 0))
629 * ata_id_string - Convert IDENTIFY DEVICE page into string
630 * @id: IDENTIFY DEVICE results we will examine
631 * @s: string into which data is output
632 * @ofs: offset into identify device page
633 * @len: length of string to return. must be an even number.
635 * The strings in the IDENTIFY DEVICE page are broken up into
636 * 16-bit chunks. Run through the string, and output each
637 * 8-bit chunk linearly, regardless of platform.
643 void ata_id_string(const u16
*id
, unsigned char *s
,
644 unsigned int ofs
, unsigned int len
)
663 * ata_id_c_string - Convert IDENTIFY DEVICE page into C string
664 * @id: IDENTIFY DEVICE results we will examine
665 * @s: string into which data is output
666 * @ofs: offset into identify device page
667 * @len: length of string to return. must be an odd number.
669 * This function is identical to ata_id_string except that it
670 * trims trailing spaces and terminates the resulting string with
671 * null. @len must be actual maximum length (even number) + 1.
676 void ata_id_c_string(const u16
*id
, unsigned char *s
,
677 unsigned int ofs
, unsigned int len
)
683 ata_id_string(id
, s
, ofs
, len
- 1);
685 p
= s
+ strnlen(s
, len
- 1);
686 while (p
> s
&& p
[-1] == ' ')
691 static u64
ata_id_n_sectors(const u16
*id
)
693 if (ata_id_has_lba(id
)) {
694 if (ata_id_has_lba48(id
))
695 return ata_id_u64(id
, 100);
697 return ata_id_u32(id
, 60);
699 if (ata_id_current_chs_valid(id
))
700 return ata_id_u32(id
, 57);
702 return id
[1] * id
[3] * id
[6];
707 * ata_noop_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 * This function performs no actual function.
713 * May be used as the dev_select() entry in ata_port_operations.
718 void ata_noop_dev_select (struct ata_port
*ap
, unsigned int device
)
724 * ata_std_dev_select - Select device 0/1 on ATA bus
725 * @ap: ATA channel to manipulate
726 * @device: ATA device (numbered from zero) to select
728 * Use the method defined in the ATA specification to
729 * make either device 0, or device 1, active on the
730 * ATA channel. Works with both PIO and MMIO.
732 * May be used as the dev_select() entry in ata_port_operations.
738 void ata_std_dev_select (struct ata_port
*ap
, unsigned int device
)
743 tmp
= ATA_DEVICE_OBS
;
745 tmp
= ATA_DEVICE_OBS
| ATA_DEV1
;
747 if (ap
->flags
& ATA_FLAG_MMIO
) {
748 writeb(tmp
, (void __iomem
*) ap
->ioaddr
.device_addr
);
750 outb(tmp
, ap
->ioaddr
.device_addr
);
752 ata_pause(ap
); /* needed; also flushes, for mmio */
756 * ata_dev_select - Select device 0/1 on ATA bus
757 * @ap: ATA channel to manipulate
758 * @device: ATA device (numbered from zero) to select
759 * @wait: non-zero to wait for Status register BSY bit to clear
760 * @can_sleep: non-zero if context allows sleeping
762 * Use the method defined in the ATA specification to
763 * make either device 0, or device 1, active on the
766 * This is a high-level version of ata_std_dev_select(),
767 * which additionally provides the services of inserting
768 * the proper pauses and status polling, where needed.
774 void ata_dev_select(struct ata_port
*ap
, unsigned int device
,
775 unsigned int wait
, unsigned int can_sleep
)
777 VPRINTK("ENTER, ata%u: device %u, wait %u\n",
778 ap
->id
, device
, wait
);
783 ap
->ops
->dev_select(ap
, device
);
786 if (can_sleep
&& ap
->device
[device
].class == ATA_DEV_ATAPI
)
793 * ata_dump_id - IDENTIFY DEVICE info debugging output
794 * @id: IDENTIFY DEVICE page to dump
796 * Dump selected 16-bit words from the given IDENTIFY DEVICE
803 static inline void ata_dump_id(const u16
*id
)
805 DPRINTK("49==0x%04x "
815 DPRINTK("80==0x%04x "
825 DPRINTK("88==0x%04x "
832 * ata_id_xfermask - Compute xfermask from the given IDENTIFY data
833 * @id: IDENTIFY data to compute xfer mask from
835 * Compute the xfermask for this device. This is not as trivial
836 * as it seems if we must consider early devices correctly.
838 * FIXME: pre IDE drive timing (do we care ?).
846 static unsigned int ata_id_xfermask(const u16
*id
)
848 unsigned int pio_mask
, mwdma_mask
, udma_mask
;
850 /* Usual case. Word 53 indicates word 64 is valid */
851 if (id
[ATA_ID_FIELD_VALID
] & (1 << 1)) {
852 pio_mask
= id
[ATA_ID_PIO_MODES
] & 0x03;
856 /* If word 64 isn't valid then Word 51 high byte holds
857 * the PIO timing number for the maximum. Turn it into
860 pio_mask
= (2 << (id
[ATA_ID_OLD_PIO_MODES
] & 0xFF)) - 1 ;
862 /* But wait.. there's more. Design your standards by
863 * committee and you too can get a free iordy field to
864 * process. However its the speeds not the modes that
865 * are supported... Note drivers using the timing API
866 * will get this right anyway
870 mwdma_mask
= id
[ATA_ID_MWDMA_MODES
] & 0x07;
873 if (id
[ATA_ID_FIELD_VALID
] & (1 << 2))
874 udma_mask
= id
[ATA_ID_UDMA_MODES
] & 0xff;
876 return ata_pack_xfermask(pio_mask
, mwdma_mask
, udma_mask
);
880 * ata_port_queue_task - Queue port_task
881 * @ap: The ata_port to queue port_task for
883 * Schedule @fn(@data) for execution after @delay jiffies using
884 * port_task. There is one port_task per port and it's the
885 * user(low level driver)'s responsibility to make sure that only
886 * one task is active at any given time.
888 * libata core layer takes care of synchronization between
889 * port_task and EH. ata_port_queue_task() may be ignored for EH
893 * Inherited from caller.
895 void ata_port_queue_task(struct ata_port
*ap
, void (*fn
)(void *), void *data
,
900 if (ap
->flags
& ATA_FLAG_FLUSH_PORT_TASK
)
903 PREPARE_WORK(&ap
->port_task
, fn
, data
);
906 rc
= queue_work(ata_wq
, &ap
->port_task
);
908 rc
= queue_delayed_work(ata_wq
, &ap
->port_task
, delay
);
910 /* rc == 0 means that another user is using port task */
915 * ata_port_flush_task - Flush port_task
916 * @ap: The ata_port to flush port_task for
918 * After this function completes, port_task is guranteed not to
919 * be running or scheduled.
922 * Kernel thread context (may sleep)
924 void ata_port_flush_task(struct ata_port
*ap
)
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
);
934 DPRINTK("flush #1\n");
935 flush_workqueue(ata_wq
);
938 * At this point, if a task is running, it's guaranteed to see
939 * the FLUSH flag; thus, it will never queue pio tasks again.
942 if (!cancel_delayed_work(&ap
->port_task
)) {
943 DPRINTK("flush #2\n");
944 flush_workqueue(ata_wq
);
947 spin_lock_irqsave(&ap
->host_set
->lock
, flags
);
948 ap
->flags
&= ~ATA_FLAG_FLUSH_PORT_TASK
;
949 spin_unlock_irqrestore(&ap
->host_set
->lock
, flags
);
954 void ata_qc_complete_internal(struct ata_queued_cmd
*qc
)
956 struct completion
*waiting
= qc
->private_data
;
958 qc
->ap
->ops
->tf_read(qc
->ap
, &qc
->tf
);
963 * ata_exec_internal - execute libata internal command
964 * @ap: Port to which the command is sent
965 * @dev: Device to which the command is sent
966 * @tf: Taskfile registers for the command and the result
967 * @cdb: CDB for packet command
968 * @dma_dir: Data tranfer direction of the command
969 * @buf: Data buffer of the command
970 * @buflen: Length of data buffer
972 * Executes libata internal command with timeout. @tf contains
973 * command on entry and result on return. Timeout and error
974 * conditions are reported via return value. No recovery action
975 * is taken after a command times out. It's caller's duty to
976 * clean up after timeout.
979 * None. Should be called with kernel context, might sleep.
982 unsigned ata_exec_internal(struct ata_port
*ap
, struct ata_device
*dev
,
983 struct ata_taskfile
*tf
, const u8
*cdb
,
984 int dma_dir
, void *buf
, unsigned int buflen
)
986 u8 command
= tf
->command
;
987 struct ata_queued_cmd
*qc
;
988 DECLARE_COMPLETION(wait
);
990 unsigned int err_mask
;
992 spin_lock_irqsave(&ap
->host_set
->lock
, flags
);
994 qc
= ata_qc_new_init(ap
, dev
);
999 memcpy(qc
->cdb
, cdb
, ATAPI_CDB_LEN
);
1000 qc
->dma_dir
= dma_dir
;
1001 if (dma_dir
!= DMA_NONE
) {
1002 ata_sg_init_one(qc
, buf
, buflen
);
1003 qc
->nsect
= buflen
/ ATA_SECT_SIZE
;
1006 qc
->private_data
= &wait
;
1007 qc
->complete_fn
= ata_qc_complete_internal
;
1011 spin_unlock_irqrestore(&ap
->host_set
->lock
, flags
);
1013 if (!wait_for_completion_timeout(&wait
, ATA_TMOUT_INTERNAL
)) {
1014 ata_port_flush_task(ap
);
1016 spin_lock_irqsave(&ap
->host_set
->lock
, flags
);
1018 /* We're racing with irq here. If we lose, the
1019 * following test prevents us from completing the qc
1020 * again. If completion irq occurs after here but
1021 * before the caller cleans up, it will result in a
1022 * spurious interrupt. We can live with that.
1024 if (qc
->flags
& ATA_QCFLAG_ACTIVE
) {
1025 qc
->err_mask
= AC_ERR_TIMEOUT
;
1026 ata_qc_complete(qc
);
1027 printk(KERN_WARNING
"ata%u: qc timeout (cmd 0x%x)\n",
1031 spin_unlock_irqrestore(&ap
->host_set
->lock
, flags
);
1035 err_mask
= qc
->err_mask
;
1039 /* XXX - Some LLDDs (sata_mv) disable port on command failure.
1040 * Until those drivers are fixed, we detect the condition
1041 * here, fail the command with AC_ERR_SYSTEM and reenable the
1044 * Note that this doesn't change any behavior as internal
1045 * command failure results in disabling the device in the
1046 * higher layer for LLDDs without new reset/EH callbacks.
1048 * Kill the following code as soon as those drivers are fixed.
1050 if (ap
->flags
& ATA_FLAG_DISABLED
) {
1051 err_mask
|= AC_ERR_SYSTEM
;
1059 * ata_pio_need_iordy - check if iordy needed
1062 * Check if the current speed of the device requires IORDY. Used
1063 * by various controllers for chip configuration.
1066 unsigned int ata_pio_need_iordy(const struct ata_device
*adev
)
1069 int speed
= adev
->pio_mode
- XFER_PIO_0
;
1076 /* If we have no drive specific rule, then PIO 2 is non IORDY */
1078 if (adev
->id
[ATA_ID_FIELD_VALID
] & 2) { /* EIDE */
1079 pio
= adev
->id
[ATA_ID_EIDE_PIO
];
1080 /* Is the speed faster than the drive allows non IORDY ? */
1082 /* This is cycle times not frequency - watch the logic! */
1083 if (pio
> 240) /* PIO2 is 240nS per cycle */
1092 * ata_dev_read_id - Read ID data from the specified device
1093 * @ap: port on which target device resides
1094 * @dev: target device
1095 * @p_class: pointer to class of the target device (may be changed)
1096 * @post_reset: is this read ID post-reset?
1097 * @p_id: read IDENTIFY page (newly allocated)
1099 * Read ID data from the specified device. ATA_CMD_ID_ATA is
1100 * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
1101 * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS
1102 * for pre-ATA4 drives.
1105 * Kernel thread context (may sleep)
1108 * 0 on success, -errno otherwise.
1110 static int ata_dev_read_id(struct ata_port
*ap
, struct ata_device
*dev
,
1111 unsigned int *p_class
, int post_reset
, u16
**p_id
)
1113 unsigned int class = *p_class
;
1114 struct ata_taskfile tf
;
1115 unsigned int err_mask
= 0;
1120 DPRINTK("ENTER, host %u, dev %u\n", ap
->id
, dev
->devno
);
1122 ata_dev_select(ap
, dev
->devno
, 1, 1); /* select device 0/1 */
1124 id
= kmalloc(sizeof(id
[0]) * ATA_ID_WORDS
, GFP_KERNEL
);
1127 reason
= "out of memory";
1132 ata_tf_init(ap
, &tf
, dev
->devno
);
1136 tf
.command
= ATA_CMD_ID_ATA
;
1139 tf
.command
= ATA_CMD_ID_ATAPI
;
1143 reason
= "unsupported class";
1147 tf
.protocol
= ATA_PROT_PIO
;
1149 err_mask
= ata_exec_internal(ap
, dev
, &tf
, NULL
, DMA_FROM_DEVICE
,
1150 id
, sizeof(id
[0]) * ATA_ID_WORDS
);
1153 reason
= "I/O error";
1157 swap_buf_le16(id
, ATA_ID_WORDS
);
1160 if ((class == ATA_DEV_ATA
) != (ata_id_is_ata(id
) | ata_id_is_cfa(id
))) {
1162 reason
= "device reports illegal type";
1166 if (post_reset
&& class == ATA_DEV_ATA
) {
1168 * The exact sequence expected by certain pre-ATA4 drives is:
1171 * INITIALIZE DEVICE PARAMETERS
1173 * Some drives were very specific about that exact sequence.
1175 if (ata_id_major_version(id
) < 4 || !ata_id_has_lba(id
)) {
1176 err_mask
= ata_dev_init_params(ap
, dev
, id
[3], id
[6]);
1179 reason
= "INIT_DEV_PARAMS failed";
1183 /* current CHS translation info (id[53-58]) might be
1184 * changed. reread the identify device info.
1196 printk(KERN_WARNING
"ata%u: dev %u failed to IDENTIFY (%s)\n",
1197 ap
->id
, dev
->devno
, reason
);
1202 static inline u8
ata_dev_knobble(const struct ata_port
*ap
,
1203 struct ata_device
*dev
)
1205 return ((ap
->cbl
== ATA_CBL_SATA
) && (!ata_id_is_sata(dev
->id
)));
1209 * ata_dev_configure - Configure the specified ATA/ATAPI device
1210 * @ap: Port on which target device resides
1211 * @dev: Target device to configure
1212 * @print_info: Enable device info printout
1214 * Configure @dev according to @dev->id. Generic and low-level
1215 * driver specific fixups are also applied.
1218 * Kernel thread context (may sleep)
1221 * 0 on success, -errno otherwise
1223 static int ata_dev_configure(struct ata_port
*ap
, struct ata_device
*dev
,
1226 const u16
*id
= dev
->id
;
1227 unsigned int xfer_mask
;
1230 if (!ata_dev_enabled(dev
)) {
1231 DPRINTK("ENTER/EXIT (host %u, dev %u) -- nodev\n",
1232 ap
->id
, dev
->devno
);
1236 DPRINTK("ENTER, host %u, dev %u\n", ap
->id
, dev
->devno
);
1238 /* print device capabilities */
1240 printk(KERN_DEBUG
"ata%u: dev %u cfg 49:%04x 82:%04x 83:%04x "
1241 "84:%04x 85:%04x 86:%04x 87:%04x 88:%04x\n",
1242 ap
->id
, dev
->devno
, id
[49], id
[82], id
[83],
1243 id
[84], id
[85], id
[86], id
[87], id
[88]);
1245 /* initialize to-be-configured parameters */
1246 dev
->flags
&= ~ATA_DFLAG_CFG_MASK
;
1247 dev
->max_sectors
= 0;
1255 * common ATA, ATAPI feature tests
1258 /* find max transfer mode; for printk only */
1259 xfer_mask
= ata_id_xfermask(id
);
1263 /* ATA-specific feature tests */
1264 if (dev
->class == ATA_DEV_ATA
) {
1265 dev
->n_sectors
= ata_id_n_sectors(id
);
1267 if (ata_id_has_lba(id
)) {
1268 const char *lba_desc
;
1271 dev
->flags
|= ATA_DFLAG_LBA
;
1272 if (ata_id_has_lba48(id
)) {
1273 dev
->flags
|= ATA_DFLAG_LBA48
;
1277 /* print device info to dmesg */
1279 printk(KERN_INFO
"ata%u: dev %u ATA-%d, "
1280 "max %s, %Lu sectors: %s\n",
1282 ata_id_major_version(id
),
1283 ata_mode_string(xfer_mask
),
1284 (unsigned long long)dev
->n_sectors
,
1289 /* Default translation */
1290 dev
->cylinders
= id
[1];
1292 dev
->sectors
= id
[6];
1294 if (ata_id_current_chs_valid(id
)) {
1295 /* Current CHS translation is valid. */
1296 dev
->cylinders
= id
[54];
1297 dev
->heads
= id
[55];
1298 dev
->sectors
= id
[56];
1301 /* print device info to dmesg */
1303 printk(KERN_INFO
"ata%u: dev %u ATA-%d, "
1304 "max %s, %Lu sectors: CHS %u/%u/%u\n",
1306 ata_id_major_version(id
),
1307 ata_mode_string(xfer_mask
),
1308 (unsigned long long)dev
->n_sectors
,
1309 dev
->cylinders
, dev
->heads
, dev
->sectors
);
1315 /* ATAPI-specific feature tests */
1316 else if (dev
->class == ATA_DEV_ATAPI
) {
1317 rc
= atapi_cdb_len(id
);
1318 if ((rc
< 12) || (rc
> ATAPI_CDB_LEN
)) {
1319 printk(KERN_WARNING
"ata%u: unsupported CDB len\n", ap
->id
);
1323 dev
->cdb_len
= (unsigned int) rc
;
1325 /* print device info to dmesg */
1327 printk(KERN_INFO
"ata%u: dev %u ATAPI, max %s\n",
1328 ap
->id
, dev
->devno
, ata_mode_string(xfer_mask
));
1331 ap
->host
->max_cmd_len
= 0;
1332 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
1333 ap
->host
->max_cmd_len
= max_t(unsigned int,
1334 ap
->host
->max_cmd_len
,
1335 ap
->device
[i
].cdb_len
);
1337 /* limit bridge transfers to udma5, 200 sectors */
1338 if (ata_dev_knobble(ap
, dev
)) {
1340 printk(KERN_INFO
"ata%u(%u): applying bridge limits\n",
1341 ap
->id
, dev
->devno
);
1342 dev
->udma_mask
&= ATA_UDMA5
;
1343 dev
->max_sectors
= ATA_MAX_SECTORS
;
1346 if (ap
->ops
->dev_config
)
1347 ap
->ops
->dev_config(ap
, dev
);
1349 DPRINTK("EXIT, drv_stat = 0x%x\n", ata_chk_status(ap
));
1353 DPRINTK("EXIT, err\n");
1358 * ata_bus_probe - Reset and probe ATA bus
1361 * Master ATA bus probing function. Initiates a hardware-dependent
1362 * bus reset, then attempts to identify any devices found on
1366 * PCI/etc. bus probe sem.
1369 * Zero on success, negative errno otherwise.
1372 static int ata_bus_probe(struct ata_port
*ap
)
1374 unsigned int classes
[ATA_MAX_DEVICES
];
1375 int tries
[ATA_MAX_DEVICES
];
1376 int i
, rc
, down_xfermask
;
1377 struct ata_device
*dev
;
1381 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
1382 tries
[i
] = ATA_PROBE_MAX_TRIES
;
1387 /* reset and determine device classes */
1388 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
1389 classes
[i
] = ATA_DEV_UNKNOWN
;
1391 if (ap
->ops
->probe_reset
) {
1392 rc
= ap
->ops
->probe_reset(ap
, classes
);
1394 printk("ata%u: reset failed (errno=%d)\n", ap
->id
, rc
);
1398 ap
->ops
->phy_reset(ap
);
1400 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
1401 if (!(ap
->flags
& ATA_FLAG_DISABLED
))
1402 classes
[i
] = ap
->device
[i
].class;
1403 ap
->device
[i
].class = ATA_DEV_UNKNOWN
;
1409 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
1410 if (classes
[i
] == ATA_DEV_UNKNOWN
)
1411 classes
[i
] = ATA_DEV_NONE
;
1413 /* read IDENTIFY page and configure devices */
1414 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
1415 dev
= &ap
->device
[i
];
1418 dev
->class = classes
[i
];
1420 if (!ata_dev_enabled(dev
))
1425 rc
= ata_dev_read_id(ap
, dev
, &dev
->class, 1, &dev
->id
);
1429 rc
= ata_dev_configure(ap
, dev
, 1);
1434 /* configure transfer mode */
1435 if (ap
->ops
->set_mode
) {
1436 /* FIXME: make ->set_mode handle no device case and
1437 * return error code and failing device on failure as
1438 * ata_set_mode() does.
1440 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
1441 if (ata_dev_enabled(&ap
->device
[i
])) {
1442 ap
->ops
->set_mode(ap
);
1447 rc
= ata_set_mode(ap
, &dev
);
1454 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
1455 if (ata_dev_enabled(&ap
->device
[i
]))
1458 /* no device present, disable port */
1459 ata_port_disable(ap
);
1460 ap
->ops
->port_disable(ap
);
1467 tries
[dev
->devno
] = 0;
1470 sata_down_spd_limit(ap
);
1473 tries
[dev
->devno
]--;
1474 if (down_xfermask
&&
1475 ata_down_xfermask_limit(ap
, dev
, tries
[dev
->devno
] == 1))
1476 tries
[dev
->devno
] = 0;
1479 if (!tries
[dev
->devno
]) {
1480 ata_down_xfermask_limit(ap
, dev
, 1);
1481 ata_dev_disable(ap
, dev
);
1488 * ata_port_probe - Mark port as enabled
1489 * @ap: Port for which we indicate enablement
1491 * Modify @ap data structure such that the system
1492 * thinks that the entire port is enabled.
1494 * LOCKING: host_set lock, or some other form of
1498 void ata_port_probe(struct ata_port
*ap
)
1500 ap
->flags
&= ~ATA_FLAG_DISABLED
;
1504 * sata_print_link_status - Print SATA link status
1505 * @ap: SATA port to printk link status about
1507 * This function prints link speed and status of a SATA link.
1512 static void sata_print_link_status(struct ata_port
*ap
)
1514 u32 sstatus
, scontrol
, tmp
;
1516 if (!ap
->ops
->scr_read
)
1519 sstatus
= scr_read(ap
, SCR_STATUS
);
1520 scontrol
= scr_read(ap
, SCR_CONTROL
);
1522 if (sata_dev_present(ap
)) {
1523 tmp
= (sstatus
>> 4) & 0xf;
1525 "ata%u: SATA link up %s (SStatus %X SControl %X)\n",
1526 ap
->id
, sata_spd_string(tmp
), sstatus
, scontrol
);
1529 "ata%u: SATA link down (SStatus %X SControl %X)\n",
1530 ap
->id
, sstatus
, scontrol
);
1535 * __sata_phy_reset - Wake/reset a low-level SATA PHY
1536 * @ap: SATA port associated with target SATA PHY.
1538 * This function issues commands to standard SATA Sxxx
1539 * PHY registers, to wake up the phy (and device), and
1540 * clear any reset condition.
1543 * PCI/etc. bus probe sem.
1546 void __sata_phy_reset(struct ata_port
*ap
)
1549 unsigned long timeout
= jiffies
+ (HZ
* 5);
1551 if (ap
->flags
& ATA_FLAG_SATA_RESET
) {
1552 /* issue phy wake/reset */
1553 scr_write_flush(ap
, SCR_CONTROL
, 0x301);
1554 /* Couldn't find anything in SATA I/II specs, but
1555 * AHCI-1.1 10.4.2 says at least 1 ms. */
1558 scr_write_flush(ap
, SCR_CONTROL
, 0x300); /* phy wake/clear reset */
1560 /* wait for phy to become ready, if necessary */
1563 sstatus
= scr_read(ap
, SCR_STATUS
);
1564 if ((sstatus
& 0xf) != 1)
1566 } while (time_before(jiffies
, timeout
));
1568 /* print link status */
1569 sata_print_link_status(ap
);
1571 /* TODO: phy layer with polling, timeouts, etc. */
1572 if (sata_dev_present(ap
))
1575 ata_port_disable(ap
);
1577 if (ap
->flags
& ATA_FLAG_DISABLED
)
1580 if (ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
)) {
1581 ata_port_disable(ap
);
1585 ap
->cbl
= ATA_CBL_SATA
;
1589 * sata_phy_reset - Reset SATA bus.
1590 * @ap: SATA port associated with target SATA PHY.
1592 * This function resets the SATA bus, and then probes
1593 * the bus for devices.
1596 * PCI/etc. bus probe sem.
1599 void sata_phy_reset(struct ata_port
*ap
)
1601 __sata_phy_reset(ap
);
1602 if (ap
->flags
& ATA_FLAG_DISABLED
)
1608 * ata_dev_pair - return other device on cable
1612 * Obtain the other device on the same cable, or if none is
1613 * present NULL is returned
1616 struct ata_device
*ata_dev_pair(struct ata_port
*ap
, struct ata_device
*adev
)
1618 struct ata_device
*pair
= &ap
->device
[1 - adev
->devno
];
1619 if (!ata_dev_enabled(pair
))
1625 * ata_port_disable - Disable port.
1626 * @ap: Port to be disabled.
1628 * Modify @ap data structure such that the system
1629 * thinks that the entire port is disabled, and should
1630 * never attempt to probe or communicate with devices
1633 * LOCKING: host_set lock, or some other form of
1637 void ata_port_disable(struct ata_port
*ap
)
1639 ap
->device
[0].class = ATA_DEV_NONE
;
1640 ap
->device
[1].class = ATA_DEV_NONE
;
1641 ap
->flags
|= ATA_FLAG_DISABLED
;
1645 * sata_down_spd_limit - adjust SATA spd limit downward
1646 * @ap: Port to adjust SATA spd limit for
1648 * Adjust SATA spd limit of @ap downward. Note that this
1649 * function only adjusts the limit. The change must be applied
1650 * using sata_set_spd().
1653 * Inherited from caller.
1656 * 0 on success, negative errno on failure
1658 int sata_down_spd_limit(struct ata_port
*ap
)
1663 if (ap
->cbl
!= ATA_CBL_SATA
|| !ap
->ops
->scr_read
)
1666 mask
= ap
->sata_spd_limit
;
1669 highbit
= fls(mask
) - 1;
1670 mask
&= ~(1 << highbit
);
1672 spd
= (scr_read(ap
, SCR_STATUS
) >> 4) & 0xf;
1676 mask
&= (1 << spd
) - 1;
1680 ap
->sata_spd_limit
= mask
;
1682 printk(KERN_WARNING
"ata%u: limiting SATA link speed to %s\n",
1683 ap
->id
, sata_spd_string(fls(mask
)));
1688 static int __sata_set_spd_needed(struct ata_port
*ap
, u32
*scontrol
)
1692 if (ap
->sata_spd_limit
== UINT_MAX
)
1695 limit
= fls(ap
->sata_spd_limit
);
1697 spd
= (*scontrol
>> 4) & 0xf;
1698 *scontrol
= (*scontrol
& ~0xf0) | ((limit
& 0xf) << 4);
1700 return spd
!= limit
;
1704 * sata_set_spd_needed - is SATA spd configuration needed
1705 * @ap: Port in question
1707 * Test whether the spd limit in SControl matches
1708 * @ap->sata_spd_limit. This function is used to determine
1709 * whether hardreset is necessary to apply SATA spd
1713 * Inherited from caller.
1716 * 1 if SATA spd configuration is needed, 0 otherwise.
1718 int sata_set_spd_needed(struct ata_port
*ap
)
1722 if (ap
->cbl
!= ATA_CBL_SATA
|| !ap
->ops
->scr_read
)
1725 scontrol
= scr_read(ap
, SCR_CONTROL
);
1727 return __sata_set_spd_needed(ap
, &scontrol
);
1731 * sata_set_spd - set SATA spd according to spd limit
1732 * @ap: Port to set SATA spd for
1734 * Set SATA spd of @ap according to sata_spd_limit.
1737 * Inherited from caller.
1740 * 0 if spd doesn't need to be changed, 1 if spd has been
1741 * changed. -EOPNOTSUPP if SCR registers are inaccessible.
1743 int sata_set_spd(struct ata_port
*ap
)
1747 if (ap
->cbl
!= ATA_CBL_SATA
|| !ap
->ops
->scr_read
)
1750 scontrol
= scr_read(ap
, SCR_CONTROL
);
1751 if (!__sata_set_spd_needed(ap
, &scontrol
))
1754 scr_write(ap
, SCR_CONTROL
, scontrol
);
1759 * This mode timing computation functionality is ported over from
1760 * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik
1763 * PIO 0-5, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
1764 * These were taken from ATA/ATAPI-6 standard, rev 0a, except
1765 * for PIO 5, which is a nonstandard extension and UDMA6, which
1766 * is currently supported only by Maxtor drives.
1769 static const struct ata_timing ata_timing
[] = {
1771 { XFER_UDMA_6
, 0, 0, 0, 0, 0, 0, 0, 15 },
1772 { XFER_UDMA_5
, 0, 0, 0, 0, 0, 0, 0, 20 },
1773 { XFER_UDMA_4
, 0, 0, 0, 0, 0, 0, 0, 30 },
1774 { XFER_UDMA_3
, 0, 0, 0, 0, 0, 0, 0, 45 },
1776 { XFER_UDMA_2
, 0, 0, 0, 0, 0, 0, 0, 60 },
1777 { XFER_UDMA_1
, 0, 0, 0, 0, 0, 0, 0, 80 },
1778 { XFER_UDMA_0
, 0, 0, 0, 0, 0, 0, 0, 120 },
1780 /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */
1782 { XFER_MW_DMA_2
, 25, 0, 0, 0, 70, 25, 120, 0 },
1783 { XFER_MW_DMA_1
, 45, 0, 0, 0, 80, 50, 150, 0 },
1784 { XFER_MW_DMA_0
, 60, 0, 0, 0, 215, 215, 480, 0 },
1786 { XFER_SW_DMA_2
, 60, 0, 0, 0, 120, 120, 240, 0 },
1787 { XFER_SW_DMA_1
, 90, 0, 0, 0, 240, 240, 480, 0 },
1788 { XFER_SW_DMA_0
, 120, 0, 0, 0, 480, 480, 960, 0 },
1790 /* { XFER_PIO_5, 20, 50, 30, 100, 50, 30, 100, 0 }, */
1791 { XFER_PIO_4
, 25, 70, 25, 120, 70, 25, 120, 0 },
1792 { XFER_PIO_3
, 30, 80, 70, 180, 80, 70, 180, 0 },
1794 { XFER_PIO_2
, 30, 290, 40, 330, 100, 90, 240, 0 },
1795 { XFER_PIO_1
, 50, 290, 93, 383, 125, 100, 383, 0 },
1796 { XFER_PIO_0
, 70, 290, 240, 600, 165, 150, 600, 0 },
1798 /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */
1803 #define ENOUGH(v,unit) (((v)-1)/(unit)+1)
1804 #define EZ(v,unit) ((v)?ENOUGH(v,unit):0)
1806 static void ata_timing_quantize(const struct ata_timing
*t
, struct ata_timing
*q
, int T
, int UT
)
1808 q
->setup
= EZ(t
->setup
* 1000, T
);
1809 q
->act8b
= EZ(t
->act8b
* 1000, T
);
1810 q
->rec8b
= EZ(t
->rec8b
* 1000, T
);
1811 q
->cyc8b
= EZ(t
->cyc8b
* 1000, T
);
1812 q
->active
= EZ(t
->active
* 1000, T
);
1813 q
->recover
= EZ(t
->recover
* 1000, T
);
1814 q
->cycle
= EZ(t
->cycle
* 1000, T
);
1815 q
->udma
= EZ(t
->udma
* 1000, UT
);
1818 void ata_timing_merge(const struct ata_timing
*a
, const struct ata_timing
*b
,
1819 struct ata_timing
*m
, unsigned int what
)
1821 if (what
& ATA_TIMING_SETUP
) m
->setup
= max(a
->setup
, b
->setup
);
1822 if (what
& ATA_TIMING_ACT8B
) m
->act8b
= max(a
->act8b
, b
->act8b
);
1823 if (what
& ATA_TIMING_REC8B
) m
->rec8b
= max(a
->rec8b
, b
->rec8b
);
1824 if (what
& ATA_TIMING_CYC8B
) m
->cyc8b
= max(a
->cyc8b
, b
->cyc8b
);
1825 if (what
& ATA_TIMING_ACTIVE
) m
->active
= max(a
->active
, b
->active
);
1826 if (what
& ATA_TIMING_RECOVER
) m
->recover
= max(a
->recover
, b
->recover
);
1827 if (what
& ATA_TIMING_CYCLE
) m
->cycle
= max(a
->cycle
, b
->cycle
);
1828 if (what
& ATA_TIMING_UDMA
) m
->udma
= max(a
->udma
, b
->udma
);
1831 static const struct ata_timing
* ata_timing_find_mode(unsigned short speed
)
1833 const struct ata_timing
*t
;
1835 for (t
= ata_timing
; t
->mode
!= speed
; t
++)
1836 if (t
->mode
== 0xFF)
1841 int ata_timing_compute(struct ata_device
*adev
, unsigned short speed
,
1842 struct ata_timing
*t
, int T
, int UT
)
1844 const struct ata_timing
*s
;
1845 struct ata_timing p
;
1851 if (!(s
= ata_timing_find_mode(speed
)))
1854 memcpy(t
, s
, sizeof(*s
));
1857 * If the drive is an EIDE drive, it can tell us it needs extended
1858 * PIO/MW_DMA cycle timing.
1861 if (adev
->id
[ATA_ID_FIELD_VALID
] & 2) { /* EIDE drive */
1862 memset(&p
, 0, sizeof(p
));
1863 if(speed
>= XFER_PIO_0
&& speed
<= XFER_SW_DMA_0
) {
1864 if (speed
<= XFER_PIO_2
) p
.cycle
= p
.cyc8b
= adev
->id
[ATA_ID_EIDE_PIO
];
1865 else p
.cycle
= p
.cyc8b
= adev
->id
[ATA_ID_EIDE_PIO_IORDY
];
1866 } else if(speed
>= XFER_MW_DMA_0
&& speed
<= XFER_MW_DMA_2
) {
1867 p
.cycle
= adev
->id
[ATA_ID_EIDE_DMA_MIN
];
1869 ata_timing_merge(&p
, t
, t
, ATA_TIMING_CYCLE
| ATA_TIMING_CYC8B
);
1873 * Convert the timing to bus clock counts.
1876 ata_timing_quantize(t
, t
, T
, UT
);
1879 * Even in DMA/UDMA modes we still use PIO access for IDENTIFY,
1880 * S.M.A.R.T * and some other commands. We have to ensure that the
1881 * DMA cycle timing is slower/equal than the fastest PIO timing.
1884 if (speed
> XFER_PIO_4
) {
1885 ata_timing_compute(adev
, adev
->pio_mode
, &p
, T
, UT
);
1886 ata_timing_merge(&p
, t
, t
, ATA_TIMING_ALL
);
1890 * Lengthen active & recovery time so that cycle time is correct.
1893 if (t
->act8b
+ t
->rec8b
< t
->cyc8b
) {
1894 t
->act8b
+= (t
->cyc8b
- (t
->act8b
+ t
->rec8b
)) / 2;
1895 t
->rec8b
= t
->cyc8b
- t
->act8b
;
1898 if (t
->active
+ t
->recover
< t
->cycle
) {
1899 t
->active
+= (t
->cycle
- (t
->active
+ t
->recover
)) / 2;
1900 t
->recover
= t
->cycle
- t
->active
;
1907 * ata_down_xfermask_limit - adjust dev xfer masks downward
1908 * @ap: Port associated with device @dev
1909 * @dev: Device to adjust xfer masks
1910 * @force_pio0: Force PIO0
1912 * Adjust xfer masks of @dev downward. Note that this function
1913 * does not apply the change. Invoking ata_set_mode() afterwards
1914 * will apply the limit.
1917 * Inherited from caller.
1920 * 0 on success, negative errno on failure
1922 int ata_down_xfermask_limit(struct ata_port
*ap
, struct ata_device
*dev
,
1925 unsigned long xfer_mask
;
1928 xfer_mask
= ata_pack_xfermask(dev
->pio_mask
, dev
->mwdma_mask
,
1933 /* don't gear down to MWDMA from UDMA, go directly to PIO */
1934 if (xfer_mask
& ATA_MASK_UDMA
)
1935 xfer_mask
&= ~ATA_MASK_MWDMA
;
1937 highbit
= fls(xfer_mask
) - 1;
1938 xfer_mask
&= ~(1 << highbit
);
1940 xfer_mask
&= 1 << ATA_SHIFT_PIO
;
1944 ata_unpack_xfermask(xfer_mask
, &dev
->pio_mask
, &dev
->mwdma_mask
,
1947 printk(KERN_WARNING
"ata%u: dev %u limiting speed to %s\n",
1948 ap
->id
, dev
->devno
, ata_mode_string(xfer_mask
));
1956 static int ata_dev_set_mode(struct ata_port
*ap
, struct ata_device
*dev
)
1958 unsigned int err_mask
;
1961 dev
->flags
&= ~ATA_DFLAG_PIO
;
1962 if (dev
->xfer_shift
== ATA_SHIFT_PIO
)
1963 dev
->flags
|= ATA_DFLAG_PIO
;
1965 err_mask
= ata_dev_set_xfermode(ap
, dev
);
1968 "ata%u: failed to set xfermode (err_mask=0x%x)\n",
1973 rc
= ata_dev_revalidate(ap
, dev
, 0);
1977 DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
1978 dev
->xfer_shift
, (int)dev
->xfer_mode
);
1980 printk(KERN_INFO
"ata%u: dev %u configured for %s\n",
1982 ata_mode_string(ata_xfer_mode2mask(dev
->xfer_mode
)));
1987 * ata_set_mode - Program timings and issue SET FEATURES - XFER
1988 * @ap: port on which timings will be programmed
1989 * @r_failed_dev: out paramter for failed device
1991 * Set ATA device disk transfer mode (PIO3, UDMA6, etc.). If
1992 * ata_set_mode() fails, pointer to the failing device is
1993 * returned in @r_failed_dev.
1996 * PCI/etc. bus probe sem.
1999 * 0 on success, negative errno otherwise
2001 int ata_set_mode(struct ata_port
*ap
, struct ata_device
**r_failed_dev
)
2003 struct ata_device
*dev
;
2004 int i
, rc
= 0, used_dma
= 0, found
= 0;
2006 /* step 1: calculate xfer_mask */
2007 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
2008 unsigned int pio_mask
, dma_mask
;
2010 dev
= &ap
->device
[i
];
2012 if (!ata_dev_enabled(dev
))
2015 ata_dev_xfermask(ap
, dev
);
2017 pio_mask
= ata_pack_xfermask(dev
->pio_mask
, 0, 0);
2018 dma_mask
= ata_pack_xfermask(0, dev
->mwdma_mask
, dev
->udma_mask
);
2019 dev
->pio_mode
= ata_xfer_mask2mode(pio_mask
);
2020 dev
->dma_mode
= ata_xfer_mask2mode(dma_mask
);
2029 /* step 2: always set host PIO timings */
2030 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
2031 dev
= &ap
->device
[i
];
2032 if (!ata_dev_enabled(dev
))
2035 if (!dev
->pio_mode
) {
2036 printk(KERN_WARNING
"ata%u: dev %u no PIO support\n",
2037 ap
->id
, dev
->devno
);
2042 dev
->xfer_mode
= dev
->pio_mode
;
2043 dev
->xfer_shift
= ATA_SHIFT_PIO
;
2044 if (ap
->ops
->set_piomode
)
2045 ap
->ops
->set_piomode(ap
, dev
);
2048 /* step 3: set host DMA timings */
2049 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
2050 dev
= &ap
->device
[i
];
2052 if (!ata_dev_enabled(dev
) || !dev
->dma_mode
)
2055 dev
->xfer_mode
= dev
->dma_mode
;
2056 dev
->xfer_shift
= ata_xfer_mode2shift(dev
->dma_mode
);
2057 if (ap
->ops
->set_dmamode
)
2058 ap
->ops
->set_dmamode(ap
, dev
);
2061 /* step 4: update devices' xfer mode */
2062 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
2063 dev
= &ap
->device
[i
];
2065 if (!ata_dev_enabled(dev
))
2068 rc
= ata_dev_set_mode(ap
, dev
);
2073 /* Record simplex status. If we selected DMA then the other
2074 * host channels are not permitted to do so.
2076 if (used_dma
&& (ap
->host_set
->flags
& ATA_HOST_SIMPLEX
))
2077 ap
->host_set
->simplex_claimed
= 1;
2079 /* step5: chip specific finalisation */
2080 if (ap
->ops
->post_set_mode
)
2081 ap
->ops
->post_set_mode(ap
);
2085 *r_failed_dev
= dev
;
2090 * ata_tf_to_host - issue ATA taskfile to host controller
2091 * @ap: port to which command is being issued
2092 * @tf: ATA taskfile register set
2094 * Issues ATA taskfile register set to ATA host controller,
2095 * with proper synchronization with interrupt handler and
2099 * spin_lock_irqsave(host_set lock)
2102 static inline void ata_tf_to_host(struct ata_port
*ap
,
2103 const struct ata_taskfile
*tf
)
2105 ap
->ops
->tf_load(ap
, tf
);
2106 ap
->ops
->exec_command(ap
, tf
);
2110 * ata_busy_sleep - sleep until BSY clears, or timeout
2111 * @ap: port containing status register to be polled
2112 * @tmout_pat: impatience timeout
2113 * @tmout: overall timeout
2115 * Sleep until ATA Status register bit BSY clears,
2116 * or a timeout occurs.
2121 unsigned int ata_busy_sleep (struct ata_port
*ap
,
2122 unsigned long tmout_pat
, unsigned long tmout
)
2124 unsigned long timer_start
, timeout
;
2127 status
= ata_busy_wait(ap
, ATA_BUSY
, 300);
2128 timer_start
= jiffies
;
2129 timeout
= timer_start
+ tmout_pat
;
2130 while ((status
& ATA_BUSY
) && (time_before(jiffies
, timeout
))) {
2132 status
= ata_busy_wait(ap
, ATA_BUSY
, 3);
2135 if (status
& ATA_BUSY
)
2136 printk(KERN_WARNING
"ata%u is slow to respond, "
2137 "please be patient\n", ap
->id
);
2139 timeout
= timer_start
+ tmout
;
2140 while ((status
& ATA_BUSY
) && (time_before(jiffies
, timeout
))) {
2142 status
= ata_chk_status(ap
);
2145 if (status
& ATA_BUSY
) {
2146 printk(KERN_ERR
"ata%u failed to respond (%lu secs)\n",
2147 ap
->id
, tmout
/ HZ
);
2154 static void ata_bus_post_reset(struct ata_port
*ap
, unsigned int devmask
)
2156 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
2157 unsigned int dev0
= devmask
& (1 << 0);
2158 unsigned int dev1
= devmask
& (1 << 1);
2159 unsigned long timeout
;
2161 /* if device 0 was found in ata_devchk, wait for its
2165 ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
);
2167 /* if device 1 was found in ata_devchk, wait for
2168 * register access, then wait for BSY to clear
2170 timeout
= jiffies
+ ATA_TMOUT_BOOT
;
2174 ap
->ops
->dev_select(ap
, 1);
2175 if (ap
->flags
& ATA_FLAG_MMIO
) {
2176 nsect
= readb((void __iomem
*) ioaddr
->nsect_addr
);
2177 lbal
= readb((void __iomem
*) ioaddr
->lbal_addr
);
2179 nsect
= inb(ioaddr
->nsect_addr
);
2180 lbal
= inb(ioaddr
->lbal_addr
);
2182 if ((nsect
== 1) && (lbal
== 1))
2184 if (time_after(jiffies
, timeout
)) {
2188 msleep(50); /* give drive a breather */
2191 ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
);
2193 /* is all this really necessary? */
2194 ap
->ops
->dev_select(ap
, 0);
2196 ap
->ops
->dev_select(ap
, 1);
2198 ap
->ops
->dev_select(ap
, 0);
2201 static unsigned int ata_bus_softreset(struct ata_port
*ap
,
2202 unsigned int devmask
)
2204 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
2206 DPRINTK("ata%u: bus reset via SRST\n", ap
->id
);
2208 /* software reset. causes dev0 to be selected */
2209 if (ap
->flags
& ATA_FLAG_MMIO
) {
2210 writeb(ap
->ctl
, (void __iomem
*) ioaddr
->ctl_addr
);
2211 udelay(20); /* FIXME: flush */
2212 writeb(ap
->ctl
| ATA_SRST
, (void __iomem
*) ioaddr
->ctl_addr
);
2213 udelay(20); /* FIXME: flush */
2214 writeb(ap
->ctl
, (void __iomem
*) ioaddr
->ctl_addr
);
2216 outb(ap
->ctl
, ioaddr
->ctl_addr
);
2218 outb(ap
->ctl
| ATA_SRST
, ioaddr
->ctl_addr
);
2220 outb(ap
->ctl
, ioaddr
->ctl_addr
);
2223 /* spec mandates ">= 2ms" before checking status.
2224 * We wait 150ms, because that was the magic delay used for
2225 * ATAPI devices in Hale Landis's ATADRVR, for the period of time
2226 * between when the ATA command register is written, and then
2227 * status is checked. Because waiting for "a while" before
2228 * checking status is fine, post SRST, we perform this magic
2229 * delay here as well.
2231 * Old drivers/ide uses the 2mS rule and then waits for ready
2235 /* Before we perform post reset processing we want to see if
2236 * the bus shows 0xFF because the odd clown forgets the D7
2237 * pulldown resistor.
2239 if (ata_check_status(ap
) == 0xFF) {
2240 printk(KERN_ERR
"ata%u: SRST failed (status 0xFF)\n", ap
->id
);
2241 return AC_ERR_OTHER
;
2244 ata_bus_post_reset(ap
, devmask
);
2250 * ata_bus_reset - reset host port and associated ATA channel
2251 * @ap: port to reset
2253 * This is typically the first time we actually start issuing
2254 * commands to the ATA channel. We wait for BSY to clear, then
2255 * issue EXECUTE DEVICE DIAGNOSTIC command, polling for its
2256 * result. Determine what devices, if any, are on the channel
2257 * by looking at the device 0/1 error register. Look at the signature
2258 * stored in each device's taskfile registers, to determine if
2259 * the device is ATA or ATAPI.
2262 * PCI/etc. bus probe sem.
2263 * Obtains host_set lock.
2266 * Sets ATA_FLAG_DISABLED if bus reset fails.
2269 void ata_bus_reset(struct ata_port
*ap
)
2271 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
2272 unsigned int slave_possible
= ap
->flags
& ATA_FLAG_SLAVE_POSS
;
2274 unsigned int dev0
, dev1
= 0, devmask
= 0;
2276 DPRINTK("ENTER, host %u, port %u\n", ap
->id
, ap
->port_no
);
2278 /* determine if device 0/1 are present */
2279 if (ap
->flags
& ATA_FLAG_SATA_RESET
)
2282 dev0
= ata_devchk(ap
, 0);
2284 dev1
= ata_devchk(ap
, 1);
2288 devmask
|= (1 << 0);
2290 devmask
|= (1 << 1);
2292 /* select device 0 again */
2293 ap
->ops
->dev_select(ap
, 0);
2295 /* issue bus reset */
2296 if (ap
->flags
& ATA_FLAG_SRST
)
2297 if (ata_bus_softreset(ap
, devmask
))
2301 * determine by signature whether we have ATA or ATAPI devices
2303 ap
->device
[0].class = ata_dev_try_classify(ap
, 0, &err
);
2304 if ((slave_possible
) && (err
!= 0x81))
2305 ap
->device
[1].class = ata_dev_try_classify(ap
, 1, &err
);
2307 /* re-enable interrupts */
2308 if (ap
->ioaddr
.ctl_addr
) /* FIXME: hack. create a hook instead */
2311 /* is double-select really necessary? */
2312 if (ap
->device
[1].class != ATA_DEV_NONE
)
2313 ap
->ops
->dev_select(ap
, 1);
2314 if (ap
->device
[0].class != ATA_DEV_NONE
)
2315 ap
->ops
->dev_select(ap
, 0);
2317 /* if no devices were detected, disable this port */
2318 if ((ap
->device
[0].class == ATA_DEV_NONE
) &&
2319 (ap
->device
[1].class == ATA_DEV_NONE
))
2322 if (ap
->flags
& (ATA_FLAG_SATA_RESET
| ATA_FLAG_SRST
)) {
2323 /* set up device control for ATA_FLAG_SATA_RESET */
2324 if (ap
->flags
& ATA_FLAG_MMIO
)
2325 writeb(ap
->ctl
, (void __iomem
*) ioaddr
->ctl_addr
);
2327 outb(ap
->ctl
, ioaddr
->ctl_addr
);
2334 printk(KERN_ERR
"ata%u: disabling port\n", ap
->id
);
2335 ap
->ops
->port_disable(ap
);
2340 static int sata_phy_resume(struct ata_port
*ap
)
2342 unsigned long timeout
= jiffies
+ (HZ
* 5);
2343 u32 scontrol
, sstatus
;
2345 scontrol
= scr_read(ap
, SCR_CONTROL
);
2346 scontrol
= (scontrol
& 0x0f0) | 0x300;
2347 scr_write_flush(ap
, SCR_CONTROL
, scontrol
);
2349 /* Wait for phy to become ready, if necessary. */
2352 sstatus
= scr_read(ap
, SCR_STATUS
);
2353 if ((sstatus
& 0xf) != 1)
2355 } while (time_before(jiffies
, timeout
));
2361 * ata_std_probeinit - initialize probing
2362 * @ap: port to be probed
2364 * @ap is about to be probed. Initialize it. This function is
2365 * to be used as standard callback for ata_drive_probe_reset().
2367 * NOTE!!! Do not use this function as probeinit if a low level
2368 * driver implements only hardreset. Just pass NULL as probeinit
2369 * in that case. Using this function is probably okay but doing
2370 * so makes reset sequence different from the original
2371 * ->phy_reset implementation and Jeff nervous. :-P
2373 void ata_std_probeinit(struct ata_port
*ap
)
2375 if ((ap
->flags
& ATA_FLAG_SATA
) && ap
->ops
->scr_read
) {
2378 /* set cable type and resume link */
2379 ap
->cbl
= ATA_CBL_SATA
;
2380 sata_phy_resume(ap
);
2382 /* init sata_spd_limit to the current value */
2383 spd
= (scr_read(ap
, SCR_CONTROL
) & 0xf0) >> 4;
2385 ap
->sata_spd_limit
&= (1 << spd
) - 1;
2387 /* wait for device */
2388 if (sata_dev_present(ap
))
2389 ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
);
2394 * ata_std_softreset - reset host port via ATA SRST
2395 * @ap: port to reset
2396 * @classes: resulting classes of attached devices
2398 * Reset host port using ATA SRST. This function is to be used
2399 * as standard callback for ata_drive_*_reset() functions.
2402 * Kernel thread context (may sleep)
2405 * 0 on success, -errno otherwise.
2407 int ata_std_softreset(struct ata_port
*ap
, unsigned int *classes
)
2409 unsigned int slave_possible
= ap
->flags
& ATA_FLAG_SLAVE_POSS
;
2410 unsigned int devmask
= 0, err_mask
;
2415 if (ap
->ops
->scr_read
&& !sata_dev_present(ap
)) {
2416 classes
[0] = ATA_DEV_NONE
;
2420 /* determine if device 0/1 are present */
2421 if (ata_devchk(ap
, 0))
2422 devmask
|= (1 << 0);
2423 if (slave_possible
&& ata_devchk(ap
, 1))
2424 devmask
|= (1 << 1);
2426 /* select device 0 again */
2427 ap
->ops
->dev_select(ap
, 0);
2429 /* issue bus reset */
2430 DPRINTK("about to softreset, devmask=%x\n", devmask
);
2431 err_mask
= ata_bus_softreset(ap
, devmask
);
2433 printk(KERN_ERR
"ata%u: SRST failed (err_mask=0x%x)\n",
2438 /* determine by signature whether we have ATA or ATAPI devices */
2439 classes
[0] = ata_dev_try_classify(ap
, 0, &err
);
2440 if (slave_possible
&& err
!= 0x81)
2441 classes
[1] = ata_dev_try_classify(ap
, 1, &err
);
2444 DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes
[0], classes
[1]);
2449 * sata_std_hardreset - reset host port via SATA phy reset
2450 * @ap: port to reset
2451 * @class: resulting class of attached device
2453 * SATA phy-reset host port using DET bits of SControl register.
2454 * This function is to be used as standard callback for
2455 * ata_drive_*_reset().
2458 * Kernel thread context (may sleep)
2461 * 0 on success, -errno otherwise.
2463 int sata_std_hardreset(struct ata_port
*ap
, unsigned int *class)
2469 if (sata_set_spd_needed(ap
)) {
2470 /* SATA spec says nothing about how to reconfigure
2471 * spd. To be on the safe side, turn off phy during
2472 * reconfiguration. This works for at least ICH7 AHCI
2475 scontrol
= scr_read(ap
, SCR_CONTROL
);
2476 scontrol
= (scontrol
& 0x0f0) | 0x302;
2477 scr_write_flush(ap
, SCR_CONTROL
, scontrol
);
2482 /* issue phy wake/reset */
2483 scontrol
= scr_read(ap
, SCR_CONTROL
);
2484 scontrol
= (scontrol
& 0x0f0) | 0x301;
2485 scr_write_flush(ap
, SCR_CONTROL
, scontrol
);
2487 /* Couldn't find anything in SATA I/II specs, but AHCI-1.1
2488 * 10.4.2 says at least 1 ms.
2492 /* bring phy back */
2493 sata_phy_resume(ap
);
2495 /* TODO: phy layer with polling, timeouts, etc. */
2496 if (!sata_dev_present(ap
)) {
2497 *class = ATA_DEV_NONE
;
2498 DPRINTK("EXIT, link offline\n");
2502 if (ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
)) {
2504 "ata%u: COMRESET failed (device not ready)\n", ap
->id
);
2508 ap
->ops
->dev_select(ap
, 0); /* probably unnecessary */
2510 *class = ata_dev_try_classify(ap
, 0, NULL
);
2512 DPRINTK("EXIT, class=%u\n", *class);
2517 * ata_std_postreset - standard postreset callback
2518 * @ap: the target ata_port
2519 * @classes: classes of attached devices
2521 * This function is invoked after a successful reset. Note that
2522 * the device might have been reset more than once using
2523 * different reset methods before postreset is invoked.
2525 * This function is to be used as standard callback for
2526 * ata_drive_*_reset().
2529 * Kernel thread context (may sleep)
2531 void ata_std_postreset(struct ata_port
*ap
, unsigned int *classes
)
2535 /* print link status */
2536 if (ap
->cbl
== ATA_CBL_SATA
)
2537 sata_print_link_status(ap
);
2539 /* re-enable interrupts */
2540 if (ap
->ioaddr
.ctl_addr
) /* FIXME: hack. create a hook instead */
2543 /* is double-select really necessary? */
2544 if (classes
[0] != ATA_DEV_NONE
)
2545 ap
->ops
->dev_select(ap
, 1);
2546 if (classes
[1] != ATA_DEV_NONE
)
2547 ap
->ops
->dev_select(ap
, 0);
2549 /* bail out if no device is present */
2550 if (classes
[0] == ATA_DEV_NONE
&& classes
[1] == ATA_DEV_NONE
) {
2551 DPRINTK("EXIT, no device\n");
2555 /* set up device control */
2556 if (ap
->ioaddr
.ctl_addr
) {
2557 if (ap
->flags
& ATA_FLAG_MMIO
)
2558 writeb(ap
->ctl
, (void __iomem
*) ap
->ioaddr
.ctl_addr
);
2560 outb(ap
->ctl
, ap
->ioaddr
.ctl_addr
);
2567 * ata_std_probe_reset - standard probe reset method
2568 * @ap: prot to perform probe-reset
2569 * @classes: resulting classes of attached devices
2571 * The stock off-the-shelf ->probe_reset method.
2574 * Kernel thread context (may sleep)
2577 * 0 on success, -errno otherwise.
2579 int ata_std_probe_reset(struct ata_port
*ap
, unsigned int *classes
)
2581 ata_reset_fn_t hardreset
;
2584 if (ap
->cbl
== ATA_CBL_SATA
&& ap
->ops
->scr_read
)
2585 hardreset
= sata_std_hardreset
;
2587 return ata_drive_probe_reset(ap
, ata_std_probeinit
,
2588 ata_std_softreset
, hardreset
,
2589 ata_std_postreset
, classes
);
2592 int ata_do_reset(struct ata_port
*ap
, ata_reset_fn_t reset
,
2593 ata_postreset_fn_t postreset
, unsigned int *classes
)
2597 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
2598 classes
[i
] = ATA_DEV_UNKNOWN
;
2600 rc
= reset(ap
, classes
);
2604 /* If any class isn't ATA_DEV_UNKNOWN, consider classification
2605 * is complete and convert all ATA_DEV_UNKNOWN to
2608 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
2609 if (classes
[i
] != ATA_DEV_UNKNOWN
)
2612 if (i
< ATA_MAX_DEVICES
)
2613 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
2614 if (classes
[i
] == ATA_DEV_UNKNOWN
)
2615 classes
[i
] = ATA_DEV_NONE
;
2618 postreset(ap
, classes
);
2624 * ata_drive_probe_reset - Perform probe reset with given methods
2625 * @ap: port to reset
2626 * @probeinit: probeinit method (can be NULL)
2627 * @softreset: softreset method (can be NULL)
2628 * @hardreset: hardreset method (can be NULL)
2629 * @postreset: postreset method (can be NULL)
2630 * @classes: resulting classes of attached devices
2632 * Reset the specified port and classify attached devices using
2633 * given methods. This function prefers softreset but tries all
2634 * possible reset sequences to reset and classify devices. This
2635 * function is intended to be used for constructing ->probe_reset
2636 * callback by low level drivers.
2638 * Reset methods should follow the following rules.
2640 * - Return 0 on sucess, -errno on failure.
2641 * - If classification is supported, fill classes[] with
2642 * recognized class codes.
2643 * - If classification is not supported, leave classes[] alone.
2646 * Kernel thread context (may sleep)
2649 * 0 on success, -EINVAL if no reset method is avaliable, -ENODEV
2650 * if classification fails, and any error code from reset
2653 int ata_drive_probe_reset(struct ata_port
*ap
, ata_probeinit_fn_t probeinit
,
2654 ata_reset_fn_t softreset
, ata_reset_fn_t hardreset
,
2655 ata_postreset_fn_t postreset
, unsigned int *classes
)
2662 if (softreset
&& !sata_set_spd_needed(ap
)) {
2663 rc
= ata_do_reset(ap
, softreset
, postreset
, classes
);
2664 if (rc
== 0 && classes
[0] != ATA_DEV_UNKNOWN
)
2666 printk(KERN_INFO
"ata%u: softreset failed, will try "
2667 "hardreset in 5 secs\n", ap
->id
);
2675 rc
= ata_do_reset(ap
, hardreset
, postreset
, classes
);
2677 if (classes
[0] != ATA_DEV_UNKNOWN
)
2682 if (sata_down_spd_limit(ap
))
2685 printk(KERN_INFO
"ata%u: hardreset failed, will retry "
2686 "in 5 secs\n", ap
->id
);
2691 printk(KERN_INFO
"ata%u: hardreset succeeded without "
2692 "classification, will retry softreset in 5 secs\n",
2696 rc
= ata_do_reset(ap
, softreset
, postreset
, classes
);
2700 if (rc
== 0 && classes
[0] == ATA_DEV_UNKNOWN
)
2706 * ata_dev_same_device - Determine whether new ID matches configured device
2707 * @ap: port on which the device to compare against resides
2708 * @dev: device to compare against
2709 * @new_class: class of the new device
2710 * @new_id: IDENTIFY page of the new device
2712 * Compare @new_class and @new_id against @dev and determine
2713 * whether @dev is the device indicated by @new_class and
2720 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
2722 static int ata_dev_same_device(struct ata_port
*ap
, struct ata_device
*dev
,
2723 unsigned int new_class
, const u16
*new_id
)
2725 const u16
*old_id
= dev
->id
;
2726 unsigned char model
[2][41], serial
[2][21];
2729 if (dev
->class != new_class
) {
2731 "ata%u: dev %u class mismatch %d != %d\n",
2732 ap
->id
, dev
->devno
, dev
->class, new_class
);
2736 ata_id_c_string(old_id
, model
[0], ATA_ID_PROD_OFS
, sizeof(model
[0]));
2737 ata_id_c_string(new_id
, model
[1], ATA_ID_PROD_OFS
, sizeof(model
[1]));
2738 ata_id_c_string(old_id
, serial
[0], ATA_ID_SERNO_OFS
, sizeof(serial
[0]));
2739 ata_id_c_string(new_id
, serial
[1], ATA_ID_SERNO_OFS
, sizeof(serial
[1]));
2740 new_n_sectors
= ata_id_n_sectors(new_id
);
2742 if (strcmp(model
[0], model
[1])) {
2744 "ata%u: dev %u model number mismatch '%s' != '%s'\n",
2745 ap
->id
, dev
->devno
, model
[0], model
[1]);
2749 if (strcmp(serial
[0], serial
[1])) {
2751 "ata%u: dev %u serial number mismatch '%s' != '%s'\n",
2752 ap
->id
, dev
->devno
, serial
[0], serial
[1]);
2756 if (dev
->class == ATA_DEV_ATA
&& dev
->n_sectors
!= new_n_sectors
) {
2758 "ata%u: dev %u n_sectors mismatch %llu != %llu\n",
2759 ap
->id
, dev
->devno
, (unsigned long long)dev
->n_sectors
,
2760 (unsigned long long)new_n_sectors
);
2768 * ata_dev_revalidate - Revalidate ATA device
2769 * @ap: port on which the device to revalidate resides
2770 * @dev: device to revalidate
2771 * @post_reset: is this revalidation after reset?
2773 * Re-read IDENTIFY page and make sure @dev is still attached to
2777 * Kernel thread context (may sleep)
2780 * 0 on success, negative errno otherwise
2782 int ata_dev_revalidate(struct ata_port
*ap
, struct ata_device
*dev
,
2785 unsigned int class = dev
->class;
2789 if (!ata_dev_enabled(dev
)) {
2794 /* allocate & read ID data */
2795 rc
= ata_dev_read_id(ap
, dev
, &class, post_reset
, &id
);
2799 /* is the device still there? */
2800 if (!ata_dev_same_device(ap
, dev
, class, id
)) {
2808 /* configure device according to the new ID */
2809 rc
= ata_dev_configure(ap
, dev
, 0);
2814 printk(KERN_ERR
"ata%u: dev %u revalidation failed (errno=%d)\n",
2815 ap
->id
, dev
->devno
, rc
);
2820 static const char * const ata_dma_blacklist
[] = {
2821 "WDC AC11000H", NULL
,
2822 "WDC AC22100H", NULL
,
2823 "WDC AC32500H", NULL
,
2824 "WDC AC33100H", NULL
,
2825 "WDC AC31600H", NULL
,
2826 "WDC AC32100H", "24.09P07",
2827 "WDC AC23200L", "21.10N21",
2828 "Compaq CRD-8241B", NULL
,
2833 "SanDisk SDP3B", NULL
,
2834 "SanDisk SDP3B-64", NULL
,
2835 "SANYO CD-ROM CRD", NULL
,
2836 "HITACHI CDR-8", NULL
,
2837 "HITACHI CDR-8335", NULL
,
2838 "HITACHI CDR-8435", NULL
,
2839 "Toshiba CD-ROM XM-6202B", NULL
,
2840 "TOSHIBA CD-ROM XM-1702BC", NULL
,
2842 "E-IDE CD-ROM CR-840", NULL
,
2843 "CD-ROM Drive/F5A", NULL
,
2844 "WPI CDD-820", NULL
,
2845 "SAMSUNG CD-ROM SC-148C", NULL
,
2846 "SAMSUNG CD-ROM SC", NULL
,
2847 "SanDisk SDP3B-64", NULL
,
2848 "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL
,
2849 "_NEC DV5800A", NULL
,
2850 "SAMSUNG CD-ROM SN-124", "N001"
2853 static int ata_strim(char *s
, size_t len
)
2855 len
= strnlen(s
, len
);
2857 /* ATAPI specifies that empty space is blank-filled; remove blanks */
2858 while ((len
> 0) && (s
[len
- 1] == ' ')) {
2865 static int ata_dma_blacklisted(const struct ata_device
*dev
)
2867 unsigned char model_num
[40];
2868 unsigned char model_rev
[16];
2869 unsigned int nlen
, rlen
;
2872 ata_id_string(dev
->id
, model_num
, ATA_ID_PROD_OFS
,
2874 ata_id_string(dev
->id
, model_rev
, ATA_ID_FW_REV_OFS
,
2876 nlen
= ata_strim(model_num
, sizeof(model_num
));
2877 rlen
= ata_strim(model_rev
, sizeof(model_rev
));
2879 for (i
= 0; i
< ARRAY_SIZE(ata_dma_blacklist
); i
+= 2) {
2880 if (!strncmp(ata_dma_blacklist
[i
], model_num
, nlen
)) {
2881 if (ata_dma_blacklist
[i
+1] == NULL
)
2883 if (!strncmp(ata_dma_blacklist
[i
], model_rev
, rlen
))
2891 * ata_dev_xfermask - Compute supported xfermask of the given device
2892 * @ap: Port on which the device to compute xfermask for resides
2893 * @dev: Device to compute xfermask for
2895 * Compute supported xfermask of @dev and store it in
2896 * dev->*_mask. This function is responsible for applying all
2897 * known limits including host controller limits, device
2900 * FIXME: The current implementation limits all transfer modes to
2901 * the fastest of the lowested device on the port. This is not
2902 * required on most controllers.
2907 static void ata_dev_xfermask(struct ata_port
*ap
, struct ata_device
*dev
)
2909 struct ata_host_set
*hs
= ap
->host_set
;
2910 unsigned long xfer_mask
;
2913 xfer_mask
= ata_pack_xfermask(ap
->pio_mask
,
2914 ap
->mwdma_mask
, ap
->udma_mask
);
2916 /* Apply cable rule here. Don't apply it early because when
2917 * we handle hot plug the cable type can itself change.
2919 if (ap
->cbl
== ATA_CBL_PATA40
)
2920 xfer_mask
&= ~(0xF8 << ATA_SHIFT_UDMA
);
2922 /* FIXME: Use port-wide xfermask for now */
2923 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
2924 struct ata_device
*d
= &ap
->device
[i
];
2926 if (ata_dev_absent(d
))
2929 if (ata_dev_disabled(d
)) {
2930 /* to avoid violating device selection timing */
2931 xfer_mask
&= ata_pack_xfermask(d
->pio_mask
,
2932 UINT_MAX
, UINT_MAX
);
2936 xfer_mask
&= ata_pack_xfermask(d
->pio_mask
,
2937 d
->mwdma_mask
, d
->udma_mask
);
2938 xfer_mask
&= ata_id_xfermask(d
->id
);
2939 if (ata_dma_blacklisted(d
))
2940 xfer_mask
&= ~(ATA_MASK_MWDMA
| ATA_MASK_UDMA
);
2943 if (ata_dma_blacklisted(dev
))
2944 printk(KERN_WARNING
"ata%u: dev %u is on DMA blacklist, "
2945 "disabling DMA\n", ap
->id
, dev
->devno
);
2947 if (hs
->flags
& ATA_HOST_SIMPLEX
) {
2948 if (hs
->simplex_claimed
)
2949 xfer_mask
&= ~(ATA_MASK_MWDMA
| ATA_MASK_UDMA
);
2952 if (ap
->ops
->mode_filter
)
2953 xfer_mask
= ap
->ops
->mode_filter(ap
, dev
, xfer_mask
);
2955 ata_unpack_xfermask(xfer_mask
, &dev
->pio_mask
,
2956 &dev
->mwdma_mask
, &dev
->udma_mask
);
2960 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
2961 * @ap: Port associated with device @dev
2962 * @dev: Device to which command will be sent
2964 * Issue SET FEATURES - XFER MODE command to device @dev
2968 * PCI/etc. bus probe sem.
2971 * 0 on success, AC_ERR_* mask otherwise.
2974 static unsigned int ata_dev_set_xfermode(struct ata_port
*ap
,
2975 struct ata_device
*dev
)
2977 struct ata_taskfile tf
;
2978 unsigned int err_mask
;
2980 /* set up set-features taskfile */
2981 DPRINTK("set features - xfer mode\n");
2983 ata_tf_init(ap
, &tf
, dev
->devno
);
2984 tf
.command
= ATA_CMD_SET_FEATURES
;
2985 tf
.feature
= SETFEATURES_XFER
;
2986 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
2987 tf
.protocol
= ATA_PROT_NODATA
;
2988 tf
.nsect
= dev
->xfer_mode
;
2990 err_mask
= ata_exec_internal(ap
, dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0);
2992 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
2997 * ata_dev_init_params - Issue INIT DEV PARAMS command
2998 * @ap: Port associated with device @dev
2999 * @dev: Device to which command will be sent
3002 * Kernel thread context (may sleep)
3005 * 0 on success, AC_ERR_* mask otherwise.
3008 static unsigned int ata_dev_init_params(struct ata_port
*ap
,
3009 struct ata_device
*dev
,
3013 struct ata_taskfile tf
;
3014 unsigned int err_mask
;
3016 /* Number of sectors per track 1-255. Number of heads 1-16 */
3017 if (sectors
< 1 || sectors
> 255 || heads
< 1 || heads
> 16)
3018 return AC_ERR_INVALID
;
3020 /* set up init dev params taskfile */
3021 DPRINTK("init dev params \n");
3023 ata_tf_init(ap
, &tf
, dev
->devno
);
3024 tf
.command
= ATA_CMD_INIT_DEV_PARAMS
;
3025 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
3026 tf
.protocol
= ATA_PROT_NODATA
;
3028 tf
.device
|= (heads
- 1) & 0x0f; /* max head = num. of heads - 1 */
3030 err_mask
= ata_exec_internal(ap
, dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0);
3032 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
3037 * ata_sg_clean - Unmap DMA memory associated with command
3038 * @qc: Command containing DMA memory to be released
3040 * Unmap all mapped DMA memory associated with this command.
3043 * spin_lock_irqsave(host_set lock)
3046 static void ata_sg_clean(struct ata_queued_cmd
*qc
)
3048 struct ata_port
*ap
= qc
->ap
;
3049 struct scatterlist
*sg
= qc
->__sg
;
3050 int dir
= qc
->dma_dir
;
3051 void *pad_buf
= NULL
;
3053 WARN_ON(!(qc
->flags
& ATA_QCFLAG_DMAMAP
));
3054 WARN_ON(sg
== NULL
);
3056 if (qc
->flags
& ATA_QCFLAG_SINGLE
)
3057 WARN_ON(qc
->n_elem
> 1);
3059 VPRINTK("unmapping %u sg elements\n", qc
->n_elem
);
3061 /* if we padded the buffer out to 32-bit bound, and data
3062 * xfer direction is from-device, we must copy from the
3063 * pad buffer back into the supplied buffer
3065 if (qc
->pad_len
&& !(qc
->tf
.flags
& ATA_TFLAG_WRITE
))
3066 pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
3068 if (qc
->flags
& ATA_QCFLAG_SG
) {
3070 dma_unmap_sg(ap
->dev
, sg
, qc
->n_elem
, dir
);
3071 /* restore last sg */
3072 sg
[qc
->orig_n_elem
- 1].length
+= qc
->pad_len
;
3074 struct scatterlist
*psg
= &qc
->pad_sgent
;
3075 void *addr
= kmap_atomic(psg
->page
, KM_IRQ0
);
3076 memcpy(addr
+ psg
->offset
, pad_buf
, qc
->pad_len
);
3077 kunmap_atomic(addr
, KM_IRQ0
);
3081 dma_unmap_single(ap
->dev
,
3082 sg_dma_address(&sg
[0]), sg_dma_len(&sg
[0]),
3085 sg
->length
+= qc
->pad_len
;
3087 memcpy(qc
->buf_virt
+ sg
->length
- qc
->pad_len
,
3088 pad_buf
, qc
->pad_len
);
3091 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
3096 * ata_fill_sg - Fill PCI IDE PRD table
3097 * @qc: Metadata associated with taskfile to be transferred
3099 * Fill PCI IDE PRD (scatter-gather) table with segments
3100 * associated with the current disk command.
3103 * spin_lock_irqsave(host_set lock)
3106 static void ata_fill_sg(struct ata_queued_cmd
*qc
)
3108 struct ata_port
*ap
= qc
->ap
;
3109 struct scatterlist
*sg
;
3112 WARN_ON(qc
->__sg
== NULL
);
3113 WARN_ON(qc
->n_elem
== 0 && qc
->pad_len
== 0);
3116 ata_for_each_sg(sg
, qc
) {
3120 /* determine if physical DMA addr spans 64K boundary.
3121 * Note h/w doesn't support 64-bit, so we unconditionally
3122 * truncate dma_addr_t to u32.
3124 addr
= (u32
) sg_dma_address(sg
);
3125 sg_len
= sg_dma_len(sg
);
3128 offset
= addr
& 0xffff;
3130 if ((offset
+ sg_len
) > 0x10000)
3131 len
= 0x10000 - offset
;
3133 ap
->prd
[idx
].addr
= cpu_to_le32(addr
);
3134 ap
->prd
[idx
].flags_len
= cpu_to_le32(len
& 0xffff);
3135 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx
, addr
, len
);
3144 ap
->prd
[idx
- 1].flags_len
|= cpu_to_le32(ATA_PRD_EOT
);
3147 * ata_check_atapi_dma - Check whether ATAPI DMA can be supported
3148 * @qc: Metadata associated with taskfile to check
3150 * Allow low-level driver to filter ATA PACKET commands, returning
3151 * a status indicating whether or not it is OK to use DMA for the
3152 * supplied PACKET command.
3155 * spin_lock_irqsave(host_set lock)
3157 * RETURNS: 0 when ATAPI DMA can be used
3160 int ata_check_atapi_dma(struct ata_queued_cmd
*qc
)
3162 struct ata_port
*ap
= qc
->ap
;
3163 int rc
= 0; /* Assume ATAPI DMA is OK by default */
3165 if (ap
->ops
->check_atapi_dma
)
3166 rc
= ap
->ops
->check_atapi_dma(qc
);
3171 * ata_qc_prep - Prepare taskfile for submission
3172 * @qc: Metadata associated with taskfile to be prepared
3174 * Prepare ATA taskfile for submission.
3177 * spin_lock_irqsave(host_set lock)
3179 void ata_qc_prep(struct ata_queued_cmd
*qc
)
3181 if (!(qc
->flags
& ATA_QCFLAG_DMAMAP
))
3187 void ata_noop_qc_prep(struct ata_queued_cmd
*qc
) { }
3190 * ata_sg_init_one - Associate command with memory buffer
3191 * @qc: Command to be associated
3192 * @buf: Memory buffer
3193 * @buflen: Length of memory buffer, in bytes.
3195 * Initialize the data-related elements of queued_cmd @qc
3196 * to point to a single memory buffer, @buf of byte length @buflen.
3199 * spin_lock_irqsave(host_set lock)
3202 void ata_sg_init_one(struct ata_queued_cmd
*qc
, void *buf
, unsigned int buflen
)
3204 struct scatterlist
*sg
;
3206 qc
->flags
|= ATA_QCFLAG_SINGLE
;
3208 memset(&qc
->sgent
, 0, sizeof(qc
->sgent
));
3209 qc
->__sg
= &qc
->sgent
;
3211 qc
->orig_n_elem
= 1;
3215 sg_init_one(sg
, buf
, buflen
);
3219 * ata_sg_init - Associate command with scatter-gather table.
3220 * @qc: Command to be associated
3221 * @sg: Scatter-gather table.
3222 * @n_elem: Number of elements in s/g table.
3224 * Initialize the data-related elements of queued_cmd @qc
3225 * to point to a scatter-gather table @sg, containing @n_elem
3229 * spin_lock_irqsave(host_set lock)
3232 void ata_sg_init(struct ata_queued_cmd
*qc
, struct scatterlist
*sg
,
3233 unsigned int n_elem
)
3235 qc
->flags
|= ATA_QCFLAG_SG
;
3237 qc
->n_elem
= n_elem
;
3238 qc
->orig_n_elem
= n_elem
;
3242 * ata_sg_setup_one - DMA-map the memory buffer associated with a command.
3243 * @qc: Command with memory buffer to be mapped.
3245 * DMA-map the memory buffer associated with queued_cmd @qc.
3248 * spin_lock_irqsave(host_set lock)
3251 * Zero on success, negative on error.
3254 static int ata_sg_setup_one(struct ata_queued_cmd
*qc
)
3256 struct ata_port
*ap
= qc
->ap
;
3257 int dir
= qc
->dma_dir
;
3258 struct scatterlist
*sg
= qc
->__sg
;
3259 dma_addr_t dma_address
;
3262 /* we must lengthen transfers to end on a 32-bit boundary */
3263 qc
->pad_len
= sg
->length
& 3;
3265 void *pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
3266 struct scatterlist
*psg
= &qc
->pad_sgent
;
3268 WARN_ON(qc
->dev
->class != ATA_DEV_ATAPI
);
3270 memset(pad_buf
, 0, ATA_DMA_PAD_SZ
);
3272 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
)
3273 memcpy(pad_buf
, qc
->buf_virt
+ sg
->length
- qc
->pad_len
,
3276 sg_dma_address(psg
) = ap
->pad_dma
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
3277 sg_dma_len(psg
) = ATA_DMA_PAD_SZ
;
3279 sg
->length
-= qc
->pad_len
;
3280 if (sg
->length
== 0)
3283 DPRINTK("padding done, sg->length=%u pad_len=%u\n",
3284 sg
->length
, qc
->pad_len
);
3292 dma_address
= dma_map_single(ap
->dev
, qc
->buf_virt
,
3294 if (dma_mapping_error(dma_address
)) {
3296 sg
->length
+= qc
->pad_len
;
3300 sg_dma_address(sg
) = dma_address
;
3301 sg_dma_len(sg
) = sg
->length
;
3304 DPRINTK("mapped buffer of %d bytes for %s\n", sg_dma_len(sg
),
3305 qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
3311 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
3312 * @qc: Command with scatter-gather table to be mapped.
3314 * DMA-map the scatter-gather table associated with queued_cmd @qc.
3317 * spin_lock_irqsave(host_set lock)
3320 * Zero on success, negative on error.
3324 static int ata_sg_setup(struct ata_queued_cmd
*qc
)
3326 struct ata_port
*ap
= qc
->ap
;
3327 struct scatterlist
*sg
= qc
->__sg
;
3328 struct scatterlist
*lsg
= &sg
[qc
->n_elem
- 1];
3329 int n_elem
, pre_n_elem
, dir
, trim_sg
= 0;
3331 VPRINTK("ENTER, ata%u\n", ap
->id
);
3332 WARN_ON(!(qc
->flags
& ATA_QCFLAG_SG
));
3334 /* we must lengthen transfers to end on a 32-bit boundary */
3335 qc
->pad_len
= lsg
->length
& 3;
3337 void *pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
3338 struct scatterlist
*psg
= &qc
->pad_sgent
;
3339 unsigned int offset
;
3341 WARN_ON(qc
->dev
->class != ATA_DEV_ATAPI
);
3343 memset(pad_buf
, 0, ATA_DMA_PAD_SZ
);
3346 * psg->page/offset are used to copy to-be-written
3347 * data in this function or read data in ata_sg_clean.
3349 offset
= lsg
->offset
+ lsg
->length
- qc
->pad_len
;
3350 psg
->page
= nth_page(lsg
->page
, offset
>> PAGE_SHIFT
);
3351 psg
->offset
= offset_in_page(offset
);
3353 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
) {
3354 void *addr
= kmap_atomic(psg
->page
, KM_IRQ0
);
3355 memcpy(pad_buf
, addr
+ psg
->offset
, qc
->pad_len
);
3356 kunmap_atomic(addr
, KM_IRQ0
);
3359 sg_dma_address(psg
) = ap
->pad_dma
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
3360 sg_dma_len(psg
) = ATA_DMA_PAD_SZ
;
3362 lsg
->length
-= qc
->pad_len
;
3363 if (lsg
->length
== 0)
3366 DPRINTK("padding done, sg[%d].length=%u pad_len=%u\n",
3367 qc
->n_elem
- 1, lsg
->length
, qc
->pad_len
);
3370 pre_n_elem
= qc
->n_elem
;
3371 if (trim_sg
&& pre_n_elem
)
3380 n_elem
= dma_map_sg(ap
->dev
, sg
, pre_n_elem
, dir
);
3382 /* restore last sg */
3383 lsg
->length
+= qc
->pad_len
;
3387 DPRINTK("%d sg elements mapped\n", n_elem
);
3390 qc
->n_elem
= n_elem
;
3396 * ata_poll_qc_complete - turn irq back on and finish qc
3397 * @qc: Command to complete
3398 * @err_mask: ATA status register content
3401 * None. (grabs host lock)
3404 void ata_poll_qc_complete(struct ata_queued_cmd
*qc
)
3406 struct ata_port
*ap
= qc
->ap
;
3407 unsigned long flags
;
3409 spin_lock_irqsave(&ap
->host_set
->lock
, flags
);
3410 ap
->flags
&= ~ATA_FLAG_NOINTR
;
3412 ata_qc_complete(qc
);
3413 spin_unlock_irqrestore(&ap
->host_set
->lock
, flags
);
3417 * ata_pio_poll - poll using PIO, depending on current state
3418 * @qc: qc in progress
3421 * None. (executing in kernel thread context)
3424 * timeout value to use
3426 static unsigned long ata_pio_poll(struct ata_queued_cmd
*qc
)
3428 struct ata_port
*ap
= qc
->ap
;
3430 unsigned int poll_state
= HSM_ST_UNKNOWN
;
3431 unsigned int reg_state
= HSM_ST_UNKNOWN
;
3433 switch (ap
->hsm_task_state
) {
3436 poll_state
= HSM_ST_POLL
;
3440 case HSM_ST_LAST_POLL
:
3441 poll_state
= HSM_ST_LAST_POLL
;
3442 reg_state
= HSM_ST_LAST
;
3449 status
= ata_chk_status(ap
);
3450 if (status
& ATA_BUSY
) {
3451 if (time_after(jiffies
, ap
->pio_task_timeout
)) {
3452 qc
->err_mask
|= AC_ERR_TIMEOUT
;
3453 ap
->hsm_task_state
= HSM_ST_TMOUT
;
3456 ap
->hsm_task_state
= poll_state
;
3457 return ATA_SHORT_PAUSE
;
3460 ap
->hsm_task_state
= reg_state
;
3465 * ata_pio_complete - check if drive is busy or idle
3466 * @qc: qc to complete
3469 * None. (executing in kernel thread context)
3472 * Non-zero if qc completed, zero otherwise.
3474 static int ata_pio_complete(struct ata_queued_cmd
*qc
)
3476 struct ata_port
*ap
= qc
->ap
;
3480 * This is purely heuristic. This is a fast path. Sometimes when
3481 * we enter, BSY will be cleared in a chk-status or two. If not,
3482 * the drive is probably seeking or something. Snooze for a couple
3483 * msecs, then chk-status again. If still busy, fall back to
3484 * HSM_ST_POLL state.
3486 drv_stat
= ata_busy_wait(ap
, ATA_BUSY
, 10);
3487 if (drv_stat
& ATA_BUSY
) {
3489 drv_stat
= ata_busy_wait(ap
, ATA_BUSY
, 10);
3490 if (drv_stat
& ATA_BUSY
) {
3491 ap
->hsm_task_state
= HSM_ST_LAST_POLL
;
3492 ap
->pio_task_timeout
= jiffies
+ ATA_TMOUT_PIO
;
3497 drv_stat
= ata_wait_idle(ap
);
3498 if (!ata_ok(drv_stat
)) {
3499 qc
->err_mask
|= __ac_err_mask(drv_stat
);
3500 ap
->hsm_task_state
= HSM_ST_ERR
;
3504 ap
->hsm_task_state
= HSM_ST_IDLE
;
3506 WARN_ON(qc
->err_mask
);
3507 ata_poll_qc_complete(qc
);
3509 /* another command may start at this point */
3516 * swap_buf_le16 - swap halves of 16-bit words in place
3517 * @buf: Buffer to swap
3518 * @buf_words: Number of 16-bit words in buffer.
3520 * Swap halves of 16-bit words if needed to convert from
3521 * little-endian byte order to native cpu byte order, or
3525 * Inherited from caller.
3527 void swap_buf_le16(u16
*buf
, unsigned int buf_words
)
3532 for (i
= 0; i
< buf_words
; i
++)
3533 buf
[i
] = le16_to_cpu(buf
[i
]);
3534 #endif /* __BIG_ENDIAN */
3538 * ata_mmio_data_xfer - Transfer data by MMIO
3539 * @ap: port to read/write
3541 * @buflen: buffer length
3542 * @write_data: read/write
3544 * Transfer data from/to the device data register by MMIO.
3547 * Inherited from caller.
3550 static void ata_mmio_data_xfer(struct ata_port
*ap
, unsigned char *buf
,
3551 unsigned int buflen
, int write_data
)
3554 unsigned int words
= buflen
>> 1;
3555 u16
*buf16
= (u16
*) buf
;
3556 void __iomem
*mmio
= (void __iomem
*)ap
->ioaddr
.data_addr
;
3558 /* Transfer multiple of 2 bytes */
3560 for (i
= 0; i
< words
; i
++)
3561 writew(le16_to_cpu(buf16
[i
]), mmio
);
3563 for (i
= 0; i
< words
; i
++)
3564 buf16
[i
] = cpu_to_le16(readw(mmio
));
3567 /* Transfer trailing 1 byte, if any. */
3568 if (unlikely(buflen
& 0x01)) {
3569 u16 align_buf
[1] = { 0 };
3570 unsigned char *trailing_buf
= buf
+ buflen
- 1;
3573 memcpy(align_buf
, trailing_buf
, 1);
3574 writew(le16_to_cpu(align_buf
[0]), mmio
);
3576 align_buf
[0] = cpu_to_le16(readw(mmio
));
3577 memcpy(trailing_buf
, align_buf
, 1);
3583 * ata_pio_data_xfer - Transfer data by PIO
3584 * @ap: port to read/write
3586 * @buflen: buffer length
3587 * @write_data: read/write
3589 * Transfer data from/to the device data register by PIO.
3592 * Inherited from caller.
3595 static void ata_pio_data_xfer(struct ata_port
*ap
, unsigned char *buf
,
3596 unsigned int buflen
, int write_data
)
3598 unsigned int words
= buflen
>> 1;
3600 /* Transfer multiple of 2 bytes */
3602 outsw(ap
->ioaddr
.data_addr
, buf
, words
);
3604 insw(ap
->ioaddr
.data_addr
, buf
, words
);
3606 /* Transfer trailing 1 byte, if any. */
3607 if (unlikely(buflen
& 0x01)) {
3608 u16 align_buf
[1] = { 0 };
3609 unsigned char *trailing_buf
= buf
+ buflen
- 1;
3612 memcpy(align_buf
, trailing_buf
, 1);
3613 outw(le16_to_cpu(align_buf
[0]), ap
->ioaddr
.data_addr
);
3615 align_buf
[0] = cpu_to_le16(inw(ap
->ioaddr
.data_addr
));
3616 memcpy(trailing_buf
, align_buf
, 1);
3622 * ata_data_xfer - Transfer data from/to the data register.
3623 * @ap: port to read/write
3625 * @buflen: buffer length
3626 * @do_write: read/write
3628 * Transfer data from/to the device data register.
3631 * Inherited from caller.
3634 static void ata_data_xfer(struct ata_port
*ap
, unsigned char *buf
,
3635 unsigned int buflen
, int do_write
)
3637 /* Make the crap hardware pay the costs not the good stuff */
3638 if (unlikely(ap
->flags
& ATA_FLAG_IRQ_MASK
)) {
3639 unsigned long flags
;
3640 local_irq_save(flags
);
3641 if (ap
->flags
& ATA_FLAG_MMIO
)
3642 ata_mmio_data_xfer(ap
, buf
, buflen
, do_write
);
3644 ata_pio_data_xfer(ap
, buf
, buflen
, do_write
);
3645 local_irq_restore(flags
);
3647 if (ap
->flags
& ATA_FLAG_MMIO
)
3648 ata_mmio_data_xfer(ap
, buf
, buflen
, do_write
);
3650 ata_pio_data_xfer(ap
, buf
, buflen
, do_write
);
3655 * ata_pio_sector - Transfer ATA_SECT_SIZE (512 bytes) of data.
3656 * @qc: Command on going
3658 * Transfer ATA_SECT_SIZE of data from/to the ATA device.
3661 * Inherited from caller.
3664 static void ata_pio_sector(struct ata_queued_cmd
*qc
)
3666 int do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
);
3667 struct scatterlist
*sg
= qc
->__sg
;
3668 struct ata_port
*ap
= qc
->ap
;
3670 unsigned int offset
;
3673 if (qc
->cursect
== (qc
->nsect
- 1))
3674 ap
->hsm_task_state
= HSM_ST_LAST
;
3676 page
= sg
[qc
->cursg
].page
;
3677 offset
= sg
[qc
->cursg
].offset
+ qc
->cursg_ofs
* ATA_SECT_SIZE
;
3679 /* get the current page and offset */
3680 page
= nth_page(page
, (offset
>> PAGE_SHIFT
));
3681 offset
%= PAGE_SIZE
;
3683 buf
= kmap(page
) + offset
;
3688 if ((qc
->cursg_ofs
* ATA_SECT_SIZE
) == (&sg
[qc
->cursg
])->length
) {
3693 DPRINTK("data %s\n", qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
3695 /* do the actual data transfer */
3696 do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
);
3697 ata_data_xfer(ap
, buf
, ATA_SECT_SIZE
, do_write
);
3703 * __atapi_pio_bytes - Transfer data from/to the ATAPI device.
3704 * @qc: Command on going
3705 * @bytes: number of bytes
3707 * Transfer Transfer data from/to the ATAPI device.
3710 * Inherited from caller.
3714 static void __atapi_pio_bytes(struct ata_queued_cmd
*qc
, unsigned int bytes
)
3716 int do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
);
3717 struct scatterlist
*sg
= qc
->__sg
;
3718 struct ata_port
*ap
= qc
->ap
;
3721 unsigned int offset
, count
;
3723 if (qc
->curbytes
+ bytes
>= qc
->nbytes
)
3724 ap
->hsm_task_state
= HSM_ST_LAST
;
3727 if (unlikely(qc
->cursg
>= qc
->n_elem
)) {
3729 * The end of qc->sg is reached and the device expects
3730 * more data to transfer. In order not to overrun qc->sg
3731 * and fulfill length specified in the byte count register,
3732 * - for read case, discard trailing data from the device
3733 * - for write case, padding zero data to the device
3735 u16 pad_buf
[1] = { 0 };
3736 unsigned int words
= bytes
>> 1;
3739 if (words
) /* warning if bytes > 1 */
3740 printk(KERN_WARNING
"ata%u: %u bytes trailing data\n",
3743 for (i
= 0; i
< words
; i
++)
3744 ata_data_xfer(ap
, (unsigned char*)pad_buf
, 2, do_write
);
3746 ap
->hsm_task_state
= HSM_ST_LAST
;
3750 sg
= &qc
->__sg
[qc
->cursg
];
3753 offset
= sg
->offset
+ qc
->cursg_ofs
;
3755 /* get the current page and offset */
3756 page
= nth_page(page
, (offset
>> PAGE_SHIFT
));
3757 offset
%= PAGE_SIZE
;
3759 /* don't overrun current sg */
3760 count
= min(sg
->length
- qc
->cursg_ofs
, bytes
);
3762 /* don't cross page boundaries */
3763 count
= min(count
, (unsigned int)PAGE_SIZE
- offset
);
3765 buf
= kmap(page
) + offset
;
3768 qc
->curbytes
+= count
;
3769 qc
->cursg_ofs
+= count
;
3771 if (qc
->cursg_ofs
== sg
->length
) {
3776 DPRINTK("data %s\n", qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
3778 /* do the actual data transfer */
3779 ata_data_xfer(ap
, buf
, count
, do_write
);
3788 * atapi_pio_bytes - Transfer data from/to the ATAPI device.
3789 * @qc: Command on going
3791 * Transfer Transfer data from/to the ATAPI device.
3794 * Inherited from caller.
3797 static void atapi_pio_bytes(struct ata_queued_cmd
*qc
)
3799 struct ata_port
*ap
= qc
->ap
;
3800 struct ata_device
*dev
= qc
->dev
;
3801 unsigned int ireason
, bc_lo
, bc_hi
, bytes
;
3802 int i_write
, do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
) ? 1 : 0;
3804 ap
->ops
->tf_read(ap
, &qc
->tf
);
3805 ireason
= qc
->tf
.nsect
;
3806 bc_lo
= qc
->tf
.lbam
;
3807 bc_hi
= qc
->tf
.lbah
;
3808 bytes
= (bc_hi
<< 8) | bc_lo
;
3810 /* shall be cleared to zero, indicating xfer of data */
3811 if (ireason
& (1 << 0))
3814 /* make sure transfer direction matches expected */
3815 i_write
= ((ireason
& (1 << 1)) == 0) ? 1 : 0;
3816 if (do_write
!= i_write
)
3819 __atapi_pio_bytes(qc
, bytes
);
3824 printk(KERN_INFO
"ata%u: dev %u: ATAPI check failed\n",
3825 ap
->id
, dev
->devno
);
3826 qc
->err_mask
|= AC_ERR_HSM
;
3827 ap
->hsm_task_state
= HSM_ST_ERR
;
3831 * ata_pio_block - start PIO on a block
3832 * @qc: qc to transfer block for
3835 * None. (executing in kernel thread context)
3837 static void ata_pio_block(struct ata_queued_cmd
*qc
)
3839 struct ata_port
*ap
= qc
->ap
;
3843 * This is purely heuristic. This is a fast path.
3844 * Sometimes when we enter, BSY will be cleared in
3845 * a chk-status or two. If not, the drive is probably seeking
3846 * or something. Snooze for a couple msecs, then
3847 * chk-status again. If still busy, fall back to
3848 * HSM_ST_POLL state.
3850 status
= ata_busy_wait(ap
, ATA_BUSY
, 5);
3851 if (status
& ATA_BUSY
) {
3853 status
= ata_busy_wait(ap
, ATA_BUSY
, 10);
3854 if (status
& ATA_BUSY
) {
3855 ap
->hsm_task_state
= HSM_ST_POLL
;
3856 ap
->pio_task_timeout
= jiffies
+ ATA_TMOUT_PIO
;
3862 if (status
& (ATA_ERR
| ATA_DF
)) {
3863 qc
->err_mask
|= AC_ERR_DEV
;
3864 ap
->hsm_task_state
= HSM_ST_ERR
;
3868 /* transfer data if any */
3869 if (is_atapi_taskfile(&qc
->tf
)) {
3870 /* DRQ=0 means no more data to transfer */
3871 if ((status
& ATA_DRQ
) == 0) {
3872 ap
->hsm_task_state
= HSM_ST_LAST
;
3876 atapi_pio_bytes(qc
);
3878 /* handle BSY=0, DRQ=0 as error */
3879 if ((status
& ATA_DRQ
) == 0) {
3880 qc
->err_mask
|= AC_ERR_HSM
;
3881 ap
->hsm_task_state
= HSM_ST_ERR
;
3889 static void ata_pio_error(struct ata_queued_cmd
*qc
)
3891 struct ata_port
*ap
= qc
->ap
;
3893 if (qc
->tf
.command
!= ATA_CMD_PACKET
)
3894 printk(KERN_WARNING
"ata%u: dev %u PIO error\n",
3895 ap
->id
, qc
->dev
->devno
);
3897 /* make sure qc->err_mask is available to
3898 * know what's wrong and recover
3900 WARN_ON(qc
->err_mask
== 0);
3902 ap
->hsm_task_state
= HSM_ST_IDLE
;
3904 ata_poll_qc_complete(qc
);
3907 static void ata_pio_task(void *_data
)
3909 struct ata_queued_cmd
*qc
= _data
;
3910 struct ata_port
*ap
= qc
->ap
;
3911 unsigned long timeout
;
3918 switch (ap
->hsm_task_state
) {
3927 qc_completed
= ata_pio_complete(qc
);
3931 case HSM_ST_LAST_POLL
:
3932 timeout
= ata_pio_poll(qc
);
3942 ata_port_queue_task(ap
, ata_pio_task
, qc
, timeout
);
3943 else if (!qc_completed
)
3948 * atapi_packet_task - Write CDB bytes to hardware
3949 * @_data: qc in progress
3951 * When device has indicated its readiness to accept
3952 * a CDB, this function is called. Send the CDB.
3953 * If DMA is to be performed, exit immediately.
3954 * Otherwise, we are in polling mode, so poll
3955 * status under operation succeeds or fails.
3958 * Kernel thread context (may sleep)
3960 static void atapi_packet_task(void *_data
)
3962 struct ata_queued_cmd
*qc
= _data
;
3963 struct ata_port
*ap
= qc
->ap
;
3966 /* sleep-wait for BSY to clear */
3967 DPRINTK("busy wait\n");
3968 if (ata_busy_sleep(ap
, ATA_TMOUT_CDB_QUICK
, ATA_TMOUT_CDB
)) {
3969 qc
->err_mask
|= AC_ERR_TIMEOUT
;
3973 /* make sure DRQ is set */
3974 status
= ata_chk_status(ap
);
3975 if ((status
& (ATA_BUSY
| ATA_DRQ
)) != ATA_DRQ
) {
3976 qc
->err_mask
|= AC_ERR_HSM
;
3981 DPRINTK("send cdb\n");
3982 WARN_ON(qc
->dev
->cdb_len
< 12);
3984 if (qc
->tf
.protocol
== ATA_PROT_ATAPI_DMA
||
3985 qc
->tf
.protocol
== ATA_PROT_ATAPI_NODATA
) {
3986 unsigned long flags
;
3988 /* Once we're done issuing command and kicking bmdma,
3989 * irq handler takes over. To not lose irq, we need
3990 * to clear NOINTR flag before sending cdb, but
3991 * interrupt handler shouldn't be invoked before we're
3992 * finished. Hence, the following locking.
3994 spin_lock_irqsave(&ap
->host_set
->lock
, flags
);
3995 ap
->flags
&= ~ATA_FLAG_NOINTR
;
3996 ata_data_xfer(ap
, qc
->cdb
, qc
->dev
->cdb_len
, 1);
3997 if (qc
->tf
.protocol
== ATA_PROT_ATAPI_DMA
)
3998 ap
->ops
->bmdma_start(qc
); /* initiate bmdma */
3999 spin_unlock_irqrestore(&ap
->host_set
->lock
, flags
);
4001 ata_data_xfer(ap
, qc
->cdb
, qc
->dev
->cdb_len
, 1);
4003 /* PIO commands are handled by polling */
4004 ap
->hsm_task_state
= HSM_ST
;
4005 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
4011 ata_poll_qc_complete(qc
);
4015 * ata_qc_new - Request an available ATA command, for queueing
4016 * @ap: Port associated with device @dev
4017 * @dev: Device from whom we request an available command structure
4023 static struct ata_queued_cmd
*ata_qc_new(struct ata_port
*ap
)
4025 struct ata_queued_cmd
*qc
= NULL
;
4028 for (i
= 0; i
< ATA_MAX_QUEUE
; i
++)
4029 if (!test_and_set_bit(i
, &ap
->qactive
)) {
4030 qc
= ata_qc_from_tag(ap
, i
);
4041 * ata_qc_new_init - Request an available ATA command, and initialize it
4042 * @ap: Port associated with device @dev
4043 * @dev: Device from whom we request an available command structure
4049 struct ata_queued_cmd
*ata_qc_new_init(struct ata_port
*ap
,
4050 struct ata_device
*dev
)
4052 struct ata_queued_cmd
*qc
;
4054 qc
= ata_qc_new(ap
);
4067 * ata_qc_free - free unused ata_queued_cmd
4068 * @qc: Command to complete
4070 * Designed to free unused ata_queued_cmd object
4071 * in case something prevents using it.
4074 * spin_lock_irqsave(host_set lock)
4076 void ata_qc_free(struct ata_queued_cmd
*qc
)
4078 struct ata_port
*ap
= qc
->ap
;
4081 WARN_ON(qc
== NULL
); /* ata_qc_from_tag _might_ return NULL */
4085 if (likely(ata_tag_valid(tag
))) {
4086 qc
->tag
= ATA_TAG_POISON
;
4087 clear_bit(tag
, &ap
->qactive
);
4091 void __ata_qc_complete(struct ata_queued_cmd
*qc
)
4093 WARN_ON(qc
== NULL
); /* ata_qc_from_tag _might_ return NULL */
4094 WARN_ON(!(qc
->flags
& ATA_QCFLAG_ACTIVE
));
4096 if (likely(qc
->flags
& ATA_QCFLAG_DMAMAP
))
4099 /* command should be marked inactive atomically with qc completion */
4100 qc
->ap
->active_tag
= ATA_TAG_POISON
;
4102 /* atapi: mark qc as inactive to prevent the interrupt handler
4103 * from completing the command twice later, before the error handler
4104 * is called. (when rc != 0 and atapi request sense is needed)
4106 qc
->flags
&= ~ATA_QCFLAG_ACTIVE
;
4108 /* call completion callback */
4109 qc
->complete_fn(qc
);
4112 static inline int ata_should_dma_map(struct ata_queued_cmd
*qc
)
4114 struct ata_port
*ap
= qc
->ap
;
4116 switch (qc
->tf
.protocol
) {
4118 case ATA_PROT_ATAPI_DMA
:
4121 case ATA_PROT_ATAPI
:
4123 if (ap
->flags
& ATA_FLAG_PIO_DMA
)
4136 * ata_qc_issue - issue taskfile to device
4137 * @qc: command to issue to device
4139 * Prepare an ATA command to submission to device.
4140 * This includes mapping the data into a DMA-able
4141 * area, filling in the S/G table, and finally
4142 * writing the taskfile to hardware, starting the command.
4145 * spin_lock_irqsave(host_set lock)
4147 void ata_qc_issue(struct ata_queued_cmd
*qc
)
4149 struct ata_port
*ap
= qc
->ap
;
4151 qc
->ap
->active_tag
= qc
->tag
;
4152 qc
->flags
|= ATA_QCFLAG_ACTIVE
;
4154 if (ata_should_dma_map(qc
)) {
4155 if (qc
->flags
& ATA_QCFLAG_SG
) {
4156 if (ata_sg_setup(qc
))
4158 } else if (qc
->flags
& ATA_QCFLAG_SINGLE
) {
4159 if (ata_sg_setup_one(qc
))
4163 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
4166 ap
->ops
->qc_prep(qc
);
4168 qc
->err_mask
|= ap
->ops
->qc_issue(qc
);
4169 if (unlikely(qc
->err_mask
))
4174 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
4175 qc
->err_mask
|= AC_ERR_SYSTEM
;
4177 ata_qc_complete(qc
);
4181 * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner
4182 * @qc: command to issue to device
4184 * Using various libata functions and hooks, this function
4185 * starts an ATA command. ATA commands are grouped into
4186 * classes called "protocols", and issuing each type of protocol
4187 * is slightly different.
4189 * May be used as the qc_issue() entry in ata_port_operations.
4192 * spin_lock_irqsave(host_set lock)
4195 * Zero on success, AC_ERR_* mask on failure
4198 unsigned int ata_qc_issue_prot(struct ata_queued_cmd
*qc
)
4200 struct ata_port
*ap
= qc
->ap
;
4202 ata_dev_select(ap
, qc
->dev
->devno
, 1, 0);
4204 switch (qc
->tf
.protocol
) {
4205 case ATA_PROT_NODATA
:
4206 ata_tf_to_host(ap
, &qc
->tf
);
4210 ap
->ops
->tf_load(ap
, &qc
->tf
); /* load tf registers */
4211 ap
->ops
->bmdma_setup(qc
); /* set up bmdma */
4212 ap
->ops
->bmdma_start(qc
); /* initiate bmdma */
4215 case ATA_PROT_PIO
: /* load tf registers, initiate polling pio */
4216 ata_qc_set_polling(qc
);
4217 ata_tf_to_host(ap
, &qc
->tf
);
4218 ap
->hsm_task_state
= HSM_ST
;
4219 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
4222 case ATA_PROT_ATAPI
:
4223 ata_qc_set_polling(qc
);
4224 ata_tf_to_host(ap
, &qc
->tf
);
4225 ata_port_queue_task(ap
, atapi_packet_task
, qc
, 0);
4228 case ATA_PROT_ATAPI_NODATA
:
4229 ap
->flags
|= ATA_FLAG_NOINTR
;
4230 ata_tf_to_host(ap
, &qc
->tf
);
4231 ata_port_queue_task(ap
, atapi_packet_task
, qc
, 0);
4234 case ATA_PROT_ATAPI_DMA
:
4235 ap
->flags
|= ATA_FLAG_NOINTR
;
4236 ap
->ops
->tf_load(ap
, &qc
->tf
); /* load tf registers */
4237 ap
->ops
->bmdma_setup(qc
); /* set up bmdma */
4238 ata_port_queue_task(ap
, atapi_packet_task
, qc
, 0);
4243 return AC_ERR_SYSTEM
;
4250 * ata_host_intr - Handle host interrupt for given (port, task)
4251 * @ap: Port on which interrupt arrived (possibly...)
4252 * @qc: Taskfile currently active in engine
4254 * Handle host interrupt for given queued command. Currently,
4255 * only DMA interrupts are handled. All other commands are
4256 * handled via polling with interrupts disabled (nIEN bit).
4259 * spin_lock_irqsave(host_set lock)
4262 * One if interrupt was handled, zero if not (shared irq).
4265 inline unsigned int ata_host_intr (struct ata_port
*ap
,
4266 struct ata_queued_cmd
*qc
)
4268 u8 status
, host_stat
;
4270 switch (qc
->tf
.protocol
) {
4273 case ATA_PROT_ATAPI_DMA
:
4274 case ATA_PROT_ATAPI
:
4275 /* check status of DMA engine */
4276 host_stat
= ap
->ops
->bmdma_status(ap
);
4277 VPRINTK("ata%u: host_stat 0x%X\n", ap
->id
, host_stat
);
4279 /* if it's not our irq... */
4280 if (!(host_stat
& ATA_DMA_INTR
))
4283 /* before we do anything else, clear DMA-Start bit */
4284 ap
->ops
->bmdma_stop(qc
);
4288 case ATA_PROT_ATAPI_NODATA
:
4289 case ATA_PROT_NODATA
:
4290 /* check altstatus */
4291 status
= ata_altstatus(ap
);
4292 if (status
& ATA_BUSY
)
4295 /* check main status, clearing INTRQ */
4296 status
= ata_chk_status(ap
);
4297 if (unlikely(status
& ATA_BUSY
))
4299 DPRINTK("ata%u: protocol %d (dev_stat 0x%X)\n",
4300 ap
->id
, qc
->tf
.protocol
, status
);
4302 /* ack bmdma irq events */
4303 ap
->ops
->irq_clear(ap
);
4305 /* complete taskfile transaction */
4306 qc
->err_mask
|= ac_err_mask(status
);
4307 ata_qc_complete(qc
);
4314 return 1; /* irq handled */
4317 ap
->stats
.idle_irq
++;
4320 if ((ap
->stats
.idle_irq
% 1000) == 0) {
4321 ata_irq_ack(ap
, 0); /* debug trap */
4322 printk(KERN_WARNING
"ata%d: irq trap\n", ap
->id
);
4326 return 0; /* irq not handled */
4330 * ata_interrupt - Default ATA host interrupt handler
4331 * @irq: irq line (unused)
4332 * @dev_instance: pointer to our ata_host_set information structure
4335 * Default interrupt handler for PCI IDE devices. Calls
4336 * ata_host_intr() for each port that is not disabled.
4339 * Obtains host_set lock during operation.
4342 * IRQ_NONE or IRQ_HANDLED.
4345 irqreturn_t
ata_interrupt (int irq
, void *dev_instance
, struct pt_regs
*regs
)
4347 struct ata_host_set
*host_set
= dev_instance
;
4349 unsigned int handled
= 0;
4350 unsigned long flags
;
4352 /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */
4353 spin_lock_irqsave(&host_set
->lock
, flags
);
4355 for (i
= 0; i
< host_set
->n_ports
; i
++) {
4356 struct ata_port
*ap
;
4358 ap
= host_set
->ports
[i
];
4360 !(ap
->flags
& (ATA_FLAG_DISABLED
| ATA_FLAG_NOINTR
))) {
4361 struct ata_queued_cmd
*qc
;
4363 qc
= ata_qc_from_tag(ap
, ap
->active_tag
);
4364 if (qc
&& (!(qc
->tf
.ctl
& ATA_NIEN
)) &&
4365 (qc
->flags
& ATA_QCFLAG_ACTIVE
))
4366 handled
|= ata_host_intr(ap
, qc
);
4370 spin_unlock_irqrestore(&host_set
->lock
, flags
);
4372 return IRQ_RETVAL(handled
);
4377 * Execute a 'simple' command, that only consists of the opcode 'cmd' itself,
4378 * without filling any other registers
4380 static int ata_do_simple_cmd(struct ata_port
*ap
, struct ata_device
*dev
,
4383 struct ata_taskfile tf
;
4386 ata_tf_init(ap
, &tf
, dev
->devno
);
4389 tf
.flags
|= ATA_TFLAG_DEVICE
;
4390 tf
.protocol
= ATA_PROT_NODATA
;
4392 err
= ata_exec_internal(ap
, dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0);
4394 printk(KERN_ERR
"%s: ata command failed: %d\n",
4400 static int ata_flush_cache(struct ata_port
*ap
, struct ata_device
*dev
)
4404 if (!ata_try_flush_cache(dev
))
4407 if (ata_id_has_flush_ext(dev
->id
))
4408 cmd
= ATA_CMD_FLUSH_EXT
;
4410 cmd
= ATA_CMD_FLUSH
;
4412 return ata_do_simple_cmd(ap
, dev
, cmd
);
4415 static int ata_standby_drive(struct ata_port
*ap
, struct ata_device
*dev
)
4417 return ata_do_simple_cmd(ap
, dev
, ATA_CMD_STANDBYNOW1
);
4420 static int ata_start_drive(struct ata_port
*ap
, struct ata_device
*dev
)
4422 return ata_do_simple_cmd(ap
, dev
, ATA_CMD_IDLEIMMEDIATE
);
4426 * ata_device_resume - wakeup a previously suspended devices
4427 * @ap: port the device is connected to
4428 * @dev: the device to resume
4430 * Kick the drive back into action, by sending it an idle immediate
4431 * command and making sure its transfer mode matches between drive
4435 int ata_device_resume(struct ata_port
*ap
, struct ata_device
*dev
)
4437 if (ap
->flags
& ATA_FLAG_SUSPENDED
) {
4438 struct ata_device
*failed_dev
;
4439 ap
->flags
&= ~ATA_FLAG_SUSPENDED
;
4440 while (ata_set_mode(ap
, &failed_dev
))
4441 ata_dev_disable(ap
, failed_dev
);
4443 if (!ata_dev_enabled(dev
))
4445 if (dev
->class == ATA_DEV_ATA
)
4446 ata_start_drive(ap
, dev
);
4452 * ata_device_suspend - prepare a device for suspend
4453 * @ap: port the device is connected to
4454 * @dev: the device to suspend
4456 * Flush the cache on the drive, if appropriate, then issue a
4457 * standbynow command.
4459 int ata_device_suspend(struct ata_port
*ap
, struct ata_device
*dev
, pm_message_t state
)
4461 if (!ata_dev_enabled(dev
))
4463 if (dev
->class == ATA_DEV_ATA
)
4464 ata_flush_cache(ap
, dev
);
4466 if (state
.event
!= PM_EVENT_FREEZE
)
4467 ata_standby_drive(ap
, dev
);
4468 ap
->flags
|= ATA_FLAG_SUSPENDED
;
4473 * ata_port_start - Set port up for dma.
4474 * @ap: Port to initialize
4476 * Called just after data structures for each port are
4477 * initialized. Allocates space for PRD table.
4479 * May be used as the port_start() entry in ata_port_operations.
4482 * Inherited from caller.
4485 int ata_port_start (struct ata_port
*ap
)
4487 struct device
*dev
= ap
->dev
;
4490 ap
->prd
= dma_alloc_coherent(dev
, ATA_PRD_TBL_SZ
, &ap
->prd_dma
, GFP_KERNEL
);
4494 rc
= ata_pad_alloc(ap
, dev
);
4496 dma_free_coherent(dev
, ATA_PRD_TBL_SZ
, ap
->prd
, ap
->prd_dma
);
4500 DPRINTK("prd alloc, virt %p, dma %llx\n", ap
->prd
, (unsigned long long) ap
->prd_dma
);
4507 * ata_port_stop - Undo ata_port_start()
4508 * @ap: Port to shut down
4510 * Frees the PRD table.
4512 * May be used as the port_stop() entry in ata_port_operations.
4515 * Inherited from caller.
4518 void ata_port_stop (struct ata_port
*ap
)
4520 struct device
*dev
= ap
->dev
;
4522 dma_free_coherent(dev
, ATA_PRD_TBL_SZ
, ap
->prd
, ap
->prd_dma
);
4523 ata_pad_free(ap
, dev
);
4526 void ata_host_stop (struct ata_host_set
*host_set
)
4528 if (host_set
->mmio_base
)
4529 iounmap(host_set
->mmio_base
);
4534 * ata_host_remove - Unregister SCSI host structure with upper layers
4535 * @ap: Port to unregister
4536 * @do_unregister: 1 if we fully unregister, 0 to just stop the port
4539 * Inherited from caller.
4542 static void ata_host_remove(struct ata_port
*ap
, unsigned int do_unregister
)
4544 struct Scsi_Host
*sh
= ap
->host
;
4549 scsi_remove_host(sh
);
4551 ap
->ops
->port_stop(ap
);
4555 * ata_host_init - Initialize an ata_port structure
4556 * @ap: Structure to initialize
4557 * @host: associated SCSI mid-layer structure
4558 * @host_set: Collection of hosts to which @ap belongs
4559 * @ent: Probe information provided by low-level driver
4560 * @port_no: Port number associated with this ata_port
4562 * Initialize a new ata_port structure, and its associated
4566 * Inherited from caller.
4569 static void ata_host_init(struct ata_port
*ap
, struct Scsi_Host
*host
,
4570 struct ata_host_set
*host_set
,
4571 const struct ata_probe_ent
*ent
, unsigned int port_no
)
4577 host
->max_channel
= 1;
4578 host
->unique_id
= ata_unique_id
++;
4579 host
->max_cmd_len
= 12;
4581 ap
->flags
= ATA_FLAG_DISABLED
;
4582 ap
->id
= host
->unique_id
;
4584 ap
->ctl
= ATA_DEVCTL_OBS
;
4585 ap
->host_set
= host_set
;
4587 ap
->port_no
= port_no
;
4589 ent
->legacy_mode
? ent
->hard_port_no
: port_no
;
4590 ap
->pio_mask
= ent
->pio_mask
;
4591 ap
->mwdma_mask
= ent
->mwdma_mask
;
4592 ap
->udma_mask
= ent
->udma_mask
;
4593 ap
->flags
|= ent
->host_flags
;
4594 ap
->ops
= ent
->port_ops
;
4595 ap
->cbl
= ATA_CBL_NONE
;
4596 ap
->sata_spd_limit
= UINT_MAX
;
4597 ap
->active_tag
= ATA_TAG_POISON
;
4598 ap
->last_ctl
= 0xFF;
4600 INIT_WORK(&ap
->port_task
, NULL
, NULL
);
4601 INIT_LIST_HEAD(&ap
->eh_done_q
);
4603 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
4604 struct ata_device
*dev
= &ap
->device
[i
];
4606 dev
->pio_mask
= UINT_MAX
;
4607 dev
->mwdma_mask
= UINT_MAX
;
4608 dev
->udma_mask
= UINT_MAX
;
4612 ap
->stats
.unhandled_irq
= 1;
4613 ap
->stats
.idle_irq
= 1;
4616 memcpy(&ap
->ioaddr
, &ent
->port
[port_no
], sizeof(struct ata_ioports
));
4620 * ata_host_add - Attach low-level ATA driver to system
4621 * @ent: Information provided by low-level driver
4622 * @host_set: Collections of ports to which we add
4623 * @port_no: Port number associated with this host
4625 * Attach low-level ATA driver to system.
4628 * PCI/etc. bus probe sem.
4631 * New ata_port on success, for NULL on error.
4634 static struct ata_port
* ata_host_add(const struct ata_probe_ent
*ent
,
4635 struct ata_host_set
*host_set
,
4636 unsigned int port_no
)
4638 struct Scsi_Host
*host
;
4639 struct ata_port
*ap
;
4644 if (!ent
->port_ops
->probe_reset
&&
4645 !(ent
->host_flags
& (ATA_FLAG_SATA_RESET
| ATA_FLAG_SRST
))) {
4646 printk(KERN_ERR
"ata%u: no reset mechanism available\n",
4651 host
= scsi_host_alloc(ent
->sht
, sizeof(struct ata_port
));
4655 host
->transportt
= &ata_scsi_transport_template
;
4657 ap
= ata_shost_to_port(host
);
4659 ata_host_init(ap
, host
, host_set
, ent
, port_no
);
4661 rc
= ap
->ops
->port_start(ap
);
4668 scsi_host_put(host
);
4673 * ata_device_add - Register hardware device with ATA and SCSI layers
4674 * @ent: Probe information describing hardware device to be registered
4676 * This function processes the information provided in the probe
4677 * information struct @ent, allocates the necessary ATA and SCSI
4678 * host information structures, initializes them, and registers
4679 * everything with requisite kernel subsystems.
4681 * This function requests irqs, probes the ATA bus, and probes
4685 * PCI/etc. bus probe sem.
4688 * Number of ports registered. Zero on error (no ports registered).
4691 int ata_device_add(const struct ata_probe_ent
*ent
)
4693 unsigned int count
= 0, i
;
4694 struct device
*dev
= ent
->dev
;
4695 struct ata_host_set
*host_set
;
4698 /* alloc a container for our list of ATA ports (buses) */
4699 host_set
= kzalloc(sizeof(struct ata_host_set
) +
4700 (ent
->n_ports
* sizeof(void *)), GFP_KERNEL
);
4703 spin_lock_init(&host_set
->lock
);
4705 host_set
->dev
= dev
;
4706 host_set
->n_ports
= ent
->n_ports
;
4707 host_set
->irq
= ent
->irq
;
4708 host_set
->mmio_base
= ent
->mmio_base
;
4709 host_set
->private_data
= ent
->private_data
;
4710 host_set
->ops
= ent
->port_ops
;
4711 host_set
->flags
= ent
->host_set_flags
;
4713 /* register each port bound to this device */
4714 for (i
= 0; i
< ent
->n_ports
; i
++) {
4715 struct ata_port
*ap
;
4716 unsigned long xfer_mode_mask
;
4718 ap
= ata_host_add(ent
, host_set
, i
);
4722 host_set
->ports
[i
] = ap
;
4723 xfer_mode_mask
=(ap
->udma_mask
<< ATA_SHIFT_UDMA
) |
4724 (ap
->mwdma_mask
<< ATA_SHIFT_MWDMA
) |
4725 (ap
->pio_mask
<< ATA_SHIFT_PIO
);
4727 /* print per-port info to dmesg */
4728 printk(KERN_INFO
"ata%u: %cATA max %s cmd 0x%lX ctl 0x%lX "
4729 "bmdma 0x%lX irq %lu\n",
4731 ap
->flags
& ATA_FLAG_SATA
? 'S' : 'P',
4732 ata_mode_string(xfer_mode_mask
),
4733 ap
->ioaddr
.cmd_addr
,
4734 ap
->ioaddr
.ctl_addr
,
4735 ap
->ioaddr
.bmdma_addr
,
4739 host_set
->ops
->irq_clear(ap
);
4746 /* obtain irq, that is shared between channels */
4747 if (request_irq(ent
->irq
, ent
->port_ops
->irq_handler
, ent
->irq_flags
,
4748 DRV_NAME
, host_set
))
4751 /* perform each probe synchronously */
4752 DPRINTK("probe begin\n");
4753 for (i
= 0; i
< count
; i
++) {
4754 struct ata_port
*ap
;
4757 ap
= host_set
->ports
[i
];
4759 DPRINTK("ata%u: bus probe begin\n", ap
->id
);
4760 rc
= ata_bus_probe(ap
);
4761 DPRINTK("ata%u: bus probe end\n", ap
->id
);
4764 /* FIXME: do something useful here?
4765 * Current libata behavior will
4766 * tear down everything when
4767 * the module is removed
4768 * or the h/w is unplugged.
4772 rc
= scsi_add_host(ap
->host
, dev
);
4774 printk(KERN_ERR
"ata%u: scsi_add_host failed\n",
4776 /* FIXME: do something useful here */
4777 /* FIXME: handle unconditional calls to
4778 * scsi_scan_host and ata_host_remove, below,
4784 /* probes are done, now scan each port's disk(s) */
4785 DPRINTK("host probe begin\n");
4786 for (i
= 0; i
< count
; i
++) {
4787 struct ata_port
*ap
= host_set
->ports
[i
];
4789 ata_scsi_scan_host(ap
);
4792 dev_set_drvdata(dev
, host_set
);
4794 VPRINTK("EXIT, returning %u\n", ent
->n_ports
);
4795 return ent
->n_ports
; /* success */
4798 for (i
= 0; i
< count
; i
++) {
4799 ata_host_remove(host_set
->ports
[i
], 1);
4800 scsi_host_put(host_set
->ports
[i
]->host
);
4804 VPRINTK("EXIT, returning 0\n");
4809 * ata_host_set_remove - PCI layer callback for device removal
4810 * @host_set: ATA host set that was removed
4812 * Unregister all objects associated with this host set. Free those
4816 * Inherited from calling layer (may sleep).
4819 void ata_host_set_remove(struct ata_host_set
*host_set
)
4821 struct ata_port
*ap
;
4824 for (i
= 0; i
< host_set
->n_ports
; i
++) {
4825 ap
= host_set
->ports
[i
];
4826 scsi_remove_host(ap
->host
);
4829 free_irq(host_set
->irq
, host_set
);
4831 for (i
= 0; i
< host_set
->n_ports
; i
++) {
4832 ap
= host_set
->ports
[i
];
4834 ata_scsi_release(ap
->host
);
4836 if ((ap
->flags
& ATA_FLAG_NO_LEGACY
) == 0) {
4837 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
4839 if (ioaddr
->cmd_addr
== 0x1f0)
4840 release_region(0x1f0, 8);
4841 else if (ioaddr
->cmd_addr
== 0x170)
4842 release_region(0x170, 8);
4845 scsi_host_put(ap
->host
);
4848 if (host_set
->ops
->host_stop
)
4849 host_set
->ops
->host_stop(host_set
);
4855 * ata_scsi_release - SCSI layer callback hook for host unload
4856 * @host: libata host to be unloaded
4858 * Performs all duties necessary to shut down a libata port...
4859 * Kill port kthread, disable port, and release resources.
4862 * Inherited from SCSI layer.
4868 int ata_scsi_release(struct Scsi_Host
*host
)
4870 struct ata_port
*ap
= ata_shost_to_port(host
);
4875 ap
->ops
->port_disable(ap
);
4876 ata_host_remove(ap
, 0);
4877 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
4878 kfree(ap
->device
[i
].id
);
4885 * ata_std_ports - initialize ioaddr with standard port offsets.
4886 * @ioaddr: IO address structure to be initialized
4888 * Utility function which initializes data_addr, error_addr,
4889 * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr,
4890 * device_addr, status_addr, and command_addr to standard offsets
4891 * relative to cmd_addr.
4893 * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr.
4896 void ata_std_ports(struct ata_ioports
*ioaddr
)
4898 ioaddr
->data_addr
= ioaddr
->cmd_addr
+ ATA_REG_DATA
;
4899 ioaddr
->error_addr
= ioaddr
->cmd_addr
+ ATA_REG_ERR
;
4900 ioaddr
->feature_addr
= ioaddr
->cmd_addr
+ ATA_REG_FEATURE
;
4901 ioaddr
->nsect_addr
= ioaddr
->cmd_addr
+ ATA_REG_NSECT
;
4902 ioaddr
->lbal_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAL
;
4903 ioaddr
->lbam_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAM
;
4904 ioaddr
->lbah_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAH
;
4905 ioaddr
->device_addr
= ioaddr
->cmd_addr
+ ATA_REG_DEVICE
;
4906 ioaddr
->status_addr
= ioaddr
->cmd_addr
+ ATA_REG_STATUS
;
4907 ioaddr
->command_addr
= ioaddr
->cmd_addr
+ ATA_REG_CMD
;
4913 void ata_pci_host_stop (struct ata_host_set
*host_set
)
4915 struct pci_dev
*pdev
= to_pci_dev(host_set
->dev
);
4917 pci_iounmap(pdev
, host_set
->mmio_base
);
4921 * ata_pci_remove_one - PCI layer callback for device removal
4922 * @pdev: PCI device that was removed
4924 * PCI layer indicates to libata via this hook that
4925 * hot-unplug or module unload event has occurred.
4926 * Handle this by unregistering all objects associated
4927 * with this PCI device. Free those objects. Then finally
4928 * release PCI resources and disable device.
4931 * Inherited from PCI layer (may sleep).
4934 void ata_pci_remove_one (struct pci_dev
*pdev
)
4936 struct device
*dev
= pci_dev_to_dev(pdev
);
4937 struct ata_host_set
*host_set
= dev_get_drvdata(dev
);
4939 ata_host_set_remove(host_set
);
4940 pci_release_regions(pdev
);
4941 pci_disable_device(pdev
);
4942 dev_set_drvdata(dev
, NULL
);
4945 /* move to PCI subsystem */
4946 int pci_test_config_bits(struct pci_dev
*pdev
, const struct pci_bits
*bits
)
4948 unsigned long tmp
= 0;
4950 switch (bits
->width
) {
4953 pci_read_config_byte(pdev
, bits
->reg
, &tmp8
);
4959 pci_read_config_word(pdev
, bits
->reg
, &tmp16
);
4965 pci_read_config_dword(pdev
, bits
->reg
, &tmp32
);
4976 return (tmp
== bits
->val
) ? 1 : 0;
4979 int ata_pci_device_suspend(struct pci_dev
*pdev
, pm_message_t state
)
4981 pci_save_state(pdev
);
4982 pci_disable_device(pdev
);
4983 pci_set_power_state(pdev
, PCI_D3hot
);
4987 int ata_pci_device_resume(struct pci_dev
*pdev
)
4989 pci_set_power_state(pdev
, PCI_D0
);
4990 pci_restore_state(pdev
);
4991 pci_enable_device(pdev
);
4992 pci_set_master(pdev
);
4995 #endif /* CONFIG_PCI */
4998 static int __init
ata_init(void)
5000 ata_wq
= create_workqueue("ata");
5004 printk(KERN_DEBUG
"libata version " DRV_VERSION
" loaded.\n");
5008 static void __exit
ata_exit(void)
5010 destroy_workqueue(ata_wq
);
5013 module_init(ata_init
);
5014 module_exit(ata_exit
);
5016 static unsigned long ratelimit_time
;
5017 static spinlock_t ata_ratelimit_lock
= SPIN_LOCK_UNLOCKED
;
5019 int ata_ratelimit(void)
5022 unsigned long flags
;
5024 spin_lock_irqsave(&ata_ratelimit_lock
, flags
);
5026 if (time_after(jiffies
, ratelimit_time
)) {
5028 ratelimit_time
= jiffies
+ (HZ
/5);
5032 spin_unlock_irqrestore(&ata_ratelimit_lock
, flags
);
5038 * ata_wait_register - wait until register value changes
5039 * @reg: IO-mapped register
5040 * @mask: Mask to apply to read register value
5041 * @val: Wait condition
5042 * @interval_msec: polling interval in milliseconds
5043 * @timeout_msec: timeout in milliseconds
5045 * Waiting for some bits of register to change is a common
5046 * operation for ATA controllers. This function reads 32bit LE
5047 * IO-mapped register @reg and tests for the following condition.
5049 * (*@reg & mask) != val
5051 * If the condition is met, it returns; otherwise, the process is
5052 * repeated after @interval_msec until timeout.
5055 * Kernel thread context (may sleep)
5058 * The final register value.
5060 u32
ata_wait_register(void __iomem
*reg
, u32 mask
, u32 val
,
5061 unsigned long interval_msec
,
5062 unsigned long timeout_msec
)
5064 unsigned long timeout
;
5067 tmp
= ioread32(reg
);
5069 /* Calculate timeout _after_ the first read to make sure
5070 * preceding writes reach the controller before starting to
5071 * eat away the timeout.
5073 timeout
= jiffies
+ (timeout_msec
* HZ
) / 1000;
5075 while ((tmp
& mask
) == val
&& time_before(jiffies
, timeout
)) {
5076 msleep(interval_msec
);
5077 tmp
= ioread32(reg
);
5084 * libata is essentially a library of internal helper functions for
5085 * low-level ATA host controller drivers. As such, the API/ABI is
5086 * likely to change as new drivers are added and updated.
5087 * Do not depend on ABI/API stability.
5090 EXPORT_SYMBOL_GPL(ata_std_bios_param
);
5091 EXPORT_SYMBOL_GPL(ata_std_ports
);
5092 EXPORT_SYMBOL_GPL(ata_device_add
);
5093 EXPORT_SYMBOL_GPL(ata_host_set_remove
);
5094 EXPORT_SYMBOL_GPL(ata_sg_init
);
5095 EXPORT_SYMBOL_GPL(ata_sg_init_one
);
5096 EXPORT_SYMBOL_GPL(__ata_qc_complete
);
5097 EXPORT_SYMBOL_GPL(ata_qc_issue_prot
);
5098 EXPORT_SYMBOL_GPL(ata_tf_load
);
5099 EXPORT_SYMBOL_GPL(ata_tf_read
);
5100 EXPORT_SYMBOL_GPL(ata_noop_dev_select
);
5101 EXPORT_SYMBOL_GPL(ata_std_dev_select
);
5102 EXPORT_SYMBOL_GPL(ata_tf_to_fis
);
5103 EXPORT_SYMBOL_GPL(ata_tf_from_fis
);
5104 EXPORT_SYMBOL_GPL(ata_check_status
);
5105 EXPORT_SYMBOL_GPL(ata_altstatus
);
5106 EXPORT_SYMBOL_GPL(ata_exec_command
);
5107 EXPORT_SYMBOL_GPL(ata_port_start
);
5108 EXPORT_SYMBOL_GPL(ata_port_stop
);
5109 EXPORT_SYMBOL_GPL(ata_host_stop
);
5110 EXPORT_SYMBOL_GPL(ata_interrupt
);
5111 EXPORT_SYMBOL_GPL(ata_qc_prep
);
5112 EXPORT_SYMBOL_GPL(ata_noop_qc_prep
);
5113 EXPORT_SYMBOL_GPL(ata_bmdma_setup
);
5114 EXPORT_SYMBOL_GPL(ata_bmdma_start
);
5115 EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear
);
5116 EXPORT_SYMBOL_GPL(ata_bmdma_status
);
5117 EXPORT_SYMBOL_GPL(ata_bmdma_stop
);
5118 EXPORT_SYMBOL_GPL(ata_port_probe
);
5119 EXPORT_SYMBOL_GPL(sata_set_spd
);
5120 EXPORT_SYMBOL_GPL(sata_phy_reset
);
5121 EXPORT_SYMBOL_GPL(__sata_phy_reset
);
5122 EXPORT_SYMBOL_GPL(ata_bus_reset
);
5123 EXPORT_SYMBOL_GPL(ata_std_probeinit
);
5124 EXPORT_SYMBOL_GPL(ata_std_softreset
);
5125 EXPORT_SYMBOL_GPL(sata_std_hardreset
);
5126 EXPORT_SYMBOL_GPL(ata_std_postreset
);
5127 EXPORT_SYMBOL_GPL(ata_std_probe_reset
);
5128 EXPORT_SYMBOL_GPL(ata_drive_probe_reset
);
5129 EXPORT_SYMBOL_GPL(ata_dev_revalidate
);
5130 EXPORT_SYMBOL_GPL(ata_dev_classify
);
5131 EXPORT_SYMBOL_GPL(ata_dev_pair
);
5132 EXPORT_SYMBOL_GPL(ata_port_disable
);
5133 EXPORT_SYMBOL_GPL(ata_ratelimit
);
5134 EXPORT_SYMBOL_GPL(ata_wait_register
);
5135 EXPORT_SYMBOL_GPL(ata_busy_sleep
);
5136 EXPORT_SYMBOL_GPL(ata_port_queue_task
);
5137 EXPORT_SYMBOL_GPL(ata_scsi_ioctl
);
5138 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd
);
5139 EXPORT_SYMBOL_GPL(ata_scsi_slave_config
);
5140 EXPORT_SYMBOL_GPL(ata_scsi_release
);
5141 EXPORT_SYMBOL_GPL(ata_host_intr
);
5142 EXPORT_SYMBOL_GPL(ata_id_string
);
5143 EXPORT_SYMBOL_GPL(ata_id_c_string
);
5144 EXPORT_SYMBOL_GPL(ata_scsi_simulate
);
5146 EXPORT_SYMBOL_GPL(ata_pio_need_iordy
);
5147 EXPORT_SYMBOL_GPL(ata_timing_compute
);
5148 EXPORT_SYMBOL_GPL(ata_timing_merge
);
5151 EXPORT_SYMBOL_GPL(pci_test_config_bits
);
5152 EXPORT_SYMBOL_GPL(ata_pci_host_stop
);
5153 EXPORT_SYMBOL_GPL(ata_pci_init_native_mode
);
5154 EXPORT_SYMBOL_GPL(ata_pci_init_one
);
5155 EXPORT_SYMBOL_GPL(ata_pci_remove_one
);
5156 EXPORT_SYMBOL_GPL(ata_pci_device_suspend
);
5157 EXPORT_SYMBOL_GPL(ata_pci_device_resume
);
5158 EXPORT_SYMBOL_GPL(ata_pci_default_filter
);
5159 EXPORT_SYMBOL_GPL(ata_pci_clear_simplex
);
5160 #endif /* CONFIG_PCI */
5162 EXPORT_SYMBOL_GPL(ata_device_suspend
);
5163 EXPORT_SYMBOL_GPL(ata_device_resume
);
5164 EXPORT_SYMBOL_GPL(ata_scsi_device_suspend
);
5165 EXPORT_SYMBOL_GPL(ata_scsi_device_resume
);
5167 EXPORT_SYMBOL_GPL(ata_eng_timeout
);
5168 EXPORT_SYMBOL_GPL(ata_eh_qc_complete
);
5169 EXPORT_SYMBOL_GPL(ata_eh_qc_retry
);