[deliverable/linux.git] / drivers / ide / ide-lib.c

#include <linux/types.h>
#include <linux/string.h>
#include <linux/kernel.h>
#include <linux/interrupt.h>
#include <linux/ide.h>
#include <linux/bitops.h>

static const char *udma_str[] =
	 { "UDMA/16", "UDMA/25",  "UDMA/33",  "UDMA/44",
	   "UDMA/66", "UDMA/100", "UDMA/133", "UDMA7" };
static const char *mwdma_str[] =
	{ "MWDMA0", "MWDMA1", "MWDMA2" };
static const char *swdma_str[] =
	{ "SWDMA0", "SWDMA1", "SWDMA2" };
static const char *pio_str[] =
	{ "PIO0", "PIO1", "PIO2", "PIO3", "PIO4", "PIO5" };

/**
 *	ide_xfer_verbose	-	return IDE mode names
 *	@mode: transfer mode
 *
 *	Returns a constant string giving the name of the mode
 *	requested.
 */

const char *ide_xfer_verbose(u8 mode)
{
	const char *s;
	u8 i = mode & 0xf;

	if (mode >= XFER_UDMA_0 && mode <= XFER_UDMA_7)
		s = udma_str[i];
	else if (mode >= XFER_MW_DMA_0 && mode <= XFER_MW_DMA_2)
		s = mwdma_str[i];
	else if (mode >= XFER_SW_DMA_0 && mode <= XFER_SW_DMA_2)
		s = swdma_str[i];
	else if (mode >= XFER_PIO_0 && mode <= XFER_PIO_5)
		s = pio_str[i & 0x7];
	else if (mode == XFER_PIO_SLOW)
		s = "PIO SLOW";
	else
		s = "XFER ERROR";

	return s;
}
EXPORT_SYMBOL(ide_xfer_verbose);

/**
 *	ide_rate_filter		-	filter transfer mode
 *	@drive: IDE device
 *	@speed: desired speed
 *
 *	Given the available transfer modes this function returns
 *	the best available speed at or below the speed requested.
 *
 *	TODO: check device PIO capabilities
 */

static u8 ide_rate_filter(ide_drive_t *drive, u8 speed)
{
	ide_hwif_t *hwif = drive->hwif;
	u8 mode = ide_find_dma_mode(drive, speed);

	if (mode == 0) {
		if (hwif->pio_mask)
			mode = fls(hwif->pio_mask) - 1 + XFER_PIO_0;
		else
			mode = XFER_PIO_4;
	}

/*	printk("%s: mode 0x%02x, speed 0x%02x\n", __func__, mode, speed); */

	return min(speed, mode);
}

/**
 *	ide_get_best_pio_mode	-	get PIO mode from drive
 *	@drive: drive to consider
 *	@mode_wanted: preferred mode
 *	@max_mode: highest allowed mode
 *
 *	This routine returns the recommended PIO settings for a given drive,
 *	based on the drive->id information and the ide_pio_blacklist[].
 *
 *	Drive PIO mode is auto-selected if 255 is passed as mode_wanted.
 *	This is used by most chipset support modules when "auto-tuning".
 */

u8 ide_get_best_pio_mode(ide_drive_t *drive, u8 mode_wanted, u8 max_mode)
{
	u16 *id = drive->id;
	int pio_mode = -1, overridden = 0;

	if (mode_wanted != 255)
		return min_t(u8, mode_wanted, max_mode);

	if ((drive->hwif->host_flags & IDE_HFLAG_PIO_NO_BLACKLIST) == 0)
		pio_mode = ide_scan_pio_blacklist((char *)&id[ATA_ID_PROD]);

	if (pio_mode != -1) {
		printk(KERN_INFO "%s: is on PIO blacklist\n", drive->name);
	} else {
		pio_mode = id[ATA_ID_OLD_PIO_MODES] >> 8;
		if (pio_mode > 2) {	/* 2 is maximum allowed tPIO value */
			pio_mode = 2;
			overridden = 1;
		}

		if (id[ATA_ID_FIELD_VALID] & 2) {	      /* ATA2? */
			if (ata_id_has_iordy(id)) {
				if (id[ATA_ID_PIO_MODES] & 7) {
					overridden = 0;
					if (id[ATA_ID_PIO_MODES] & 4)
						pio_mode = 5;
					else if (id[ATA_ID_PIO_MODES] & 2)
						pio_mode = 4;
					else
						pio_mode = 3;
				}
			}
		}

		if (overridden)
			printk(KERN_INFO "%s: tPIO > 2, assuming tPIO = 2\n",
					 drive->name);
	}

	if (pio_mode > max_mode)
		pio_mode = max_mode;

	return pio_mode;
}
EXPORT_SYMBOL_GPL(ide_get_best_pio_mode);

/* req_pio == "255" for auto-tune */
void ide_set_pio(ide_drive_t *drive, u8 req_pio)
{
	ide_hwif_t *hwif = drive->hwif;
	const struct ide_port_ops *port_ops = hwif->port_ops;
	u8 host_pio, pio;

	if (port_ops == NULL || port_ops->set_pio_mode == NULL ||
	    (hwif->host_flags & IDE_HFLAG_NO_SET_MODE))
		return;

	BUG_ON(hwif->pio_mask == 0x00);

	host_pio = fls(hwif->pio_mask) - 1;

	pio = ide_get_best_pio_mode(drive, req_pio, host_pio);

	/*
	 * TODO:
	 * - report device max PIO mode
	 * - check req_pio != 255 against device max PIO mode
	 */
	printk(KERN_DEBUG "%s: host max PIO%d wanted PIO%d%s selected PIO%d\n",
			  drive->name, host_pio, req_pio,
			  req_pio == 255 ? "(auto-tune)" : "", pio);

	(void)ide_set_pio_mode(drive, XFER_PIO_0 + pio);
}
EXPORT_SYMBOL_GPL(ide_set_pio);

/**
 *	ide_toggle_bounce	-	handle bounce buffering
 *	@drive: drive to update
 *	@on: on/off boolean
 *
 *	Enable or disable bounce buffering for the device. Drives move
 *	between PIO and DMA and that changes the rules we need.
 */

void ide_toggle_bounce(ide_drive_t *drive, int on)
{
	u64 addr = BLK_BOUNCE_HIGH;	/* dma64_addr_t */

	if (!PCI_DMA_BUS_IS_PHYS) {
		addr = BLK_BOUNCE_ANY;
	} else if (on && drive->media == ide_disk) {
		struct device *dev = drive->hwif->dev;

		if (dev && dev->dma_mask)
			addr = *dev->dma_mask;
	}

	if (drive->queue)
		blk_queue_bounce_limit(drive->queue, addr);
}

int ide_set_pio_mode(ide_drive_t *drive, const u8 mode)
{
	ide_hwif_t *hwif = drive->hwif;
	const struct ide_port_ops *port_ops = hwif->port_ops;

	if (hwif->host_flags & IDE_HFLAG_NO_SET_MODE)
		return 0;

	if (port_ops == NULL || port_ops->set_pio_mode == NULL)
		return -1;

	/*
	 * TODO: temporary hack for some legacy host drivers that didn't
	 * set transfer mode on the device in ->set_pio_mode method...
	 */
	if (port_ops->set_dma_mode == NULL) {
		port_ops->set_pio_mode(drive, mode - XFER_PIO_0);
		return 0;
	}

	if (hwif->host_flags & IDE_HFLAG_POST_SET_MODE) {
		if (ide_config_drive_speed(drive, mode))
			return -1;
		port_ops->set_pio_mode(drive, mode - XFER_PIO_0);
		return 0;
	} else {
		port_ops->set_pio_mode(drive, mode - XFER_PIO_0);
		return ide_config_drive_speed(drive, mode);
	}
}

int ide_set_dma_mode(ide_drive_t *drive, const u8 mode)
{
	ide_hwif_t *hwif = drive->hwif;
	const struct ide_port_ops *port_ops = hwif->port_ops;

	if (hwif->host_flags & IDE_HFLAG_NO_SET_MODE)
		return 0;

	if (port_ops == NULL || port_ops->set_dma_mode == NULL)
		return -1;

	if (hwif->host_flags & IDE_HFLAG_POST_SET_MODE) {
		if (ide_config_drive_speed(drive, mode))
			return -1;
		port_ops->set_dma_mode(drive, mode);
		return 0;
	} else {
		port_ops->set_dma_mode(drive, mode);
		return ide_config_drive_speed(drive, mode);
	}
}
EXPORT_SYMBOL_GPL(ide_set_dma_mode);

/**
 *	ide_set_xfer_rate	-	set transfer rate
 *	@drive: drive to set
 *	@rate: speed to attempt to set
 *
 *	General helper for setting the speed of an IDE device. This
 *	function knows about user enforced limits from the configuration
 *	which ->set_pio_mode/->set_dma_mode does not.
 */

int ide_set_xfer_rate(ide_drive_t *drive, u8 rate)
{
	ide_hwif_t *hwif = drive->hwif;
	const struct ide_port_ops *port_ops = hwif->port_ops;

	if (port_ops == NULL || port_ops->set_dma_mode == NULL ||
	    (hwif->host_flags & IDE_HFLAG_NO_SET_MODE))
		return -1;

	rate = ide_rate_filter(drive, rate);

	BUG_ON(rate < XFER_PIO_0);

	if (rate >= XFER_PIO_0 && rate <= XFER_PIO_5)
		return ide_set_pio_mode(drive, rate);

	return ide_set_dma_mode(drive, rate);
}

static void ide_dump_opcode(ide_drive_t *drive)
{
	struct request *rq = drive->hwif->rq;
	ide_task_t *task = NULL;

	if (!rq)
		return;

	if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE)
		task = rq->special;

	printk(KERN_ERR "ide: failed opcode was: ");
	if (task == NULL)
		printk(KERN_CONT "unknown\n");
	else
		printk(KERN_CONT "0x%02x\n", task->tf.command);
}

u64 ide_get_lba_addr(struct ide_taskfile *tf, int lba48)
{
	u32 high, low;

	if (lba48)
		high = (tf->hob_lbah << 16) | (tf->hob_lbam << 8) |
			tf->hob_lbal;
	else
		high = tf->device & 0xf;
	low  = (tf->lbah << 16) | (tf->lbam << 8) | tf->lbal;

	return ((u64)high << 24) | low;
}
EXPORT_SYMBOL_GPL(ide_get_lba_addr);

static void ide_dump_sector(ide_drive_t *drive)
{
	ide_task_t task;
	struct ide_taskfile *tf = &task.tf;
	u8 lba48 = !!(drive->dev_flags & IDE_DFLAG_LBA48);

	memset(&task, 0, sizeof(task));
	if (lba48)
		task.tf_flags = IDE_TFLAG_IN_LBA | IDE_TFLAG_IN_HOB_LBA |
				IDE_TFLAG_LBA48;
	else
		task.tf_flags = IDE_TFLAG_IN_LBA | IDE_TFLAG_IN_DEVICE;

	drive->hwif->tp_ops->tf_read(drive, &task);

	if (lba48 || (tf->device & ATA_LBA))
		printk(KERN_CONT ", LBAsect=%llu",
			(unsigned long long)ide_get_lba_addr(tf, lba48));
	else
		printk(KERN_CONT ", CHS=%d/%d/%d", (tf->lbah << 8) + tf->lbam,
			tf->device & 0xf, tf->lbal);
}

static void ide_dump_ata_error(ide_drive_t *drive, u8 err)
{
	printk(KERN_ERR "{ ");
	if (err & ATA_ABORTED)
		printk(KERN_CONT "DriveStatusError ");
	if (err & ATA_ICRC)
		printk(KERN_CONT "%s",
			(err & ATA_ABORTED) ? "BadCRC " : "BadSector ");
	if (err & ATA_UNC)
		printk(KERN_CONT "UncorrectableError ");
	if (err & ATA_IDNF)
		printk(KERN_CONT "SectorIdNotFound ");
	if (err & ATA_TRK0NF)
		printk(KERN_CONT "TrackZeroNotFound ");
	if (err & ATA_AMNF)
		printk(KERN_CONT "AddrMarkNotFound ");
	printk(KERN_CONT "}");
	if ((err & (ATA_BBK | ATA_ABORTED)) == ATA_BBK ||
	    (err & (ATA_UNC | ATA_IDNF | ATA_AMNF))) {
		struct request *rq = drive->hwif->rq;

		ide_dump_sector(drive);

		if (rq)
			printk(KERN_CONT ", sector=%llu",
			       (unsigned long long)rq->sector);
	}
	printk(KERN_CONT "\n");
}

static void ide_dump_atapi_error(ide_drive_t *drive, u8 err)
{
	printk(KERN_ERR "{ ");
	if (err & ATAPI_ILI)
		printk(KERN_CONT "IllegalLengthIndication ");
	if (err & ATAPI_EOM)
		printk(KERN_CONT "EndOfMedia ");
	if (err & ATA_ABORTED)
		printk(KERN_CONT "AbortedCommand ");
	if (err & ATA_MCR)
		printk(KERN_CONT "MediaChangeRequested ");
	if (err & ATAPI_LFS)
		printk(KERN_CONT "LastFailedSense=0x%02x ",
			(err & ATAPI_LFS) >> 4);
	printk(KERN_CONT "}\n");
}

/**
 *	ide_dump_status		-	translate ATA/ATAPI error
 *	@drive: drive that status applies to
 *	@msg: text message to print
 *	@stat: status byte to decode
 *
 *	Error reporting, in human readable form (luxurious, but a memory hog).
 *	Combines the drive name, message and status byte to provide a
 *	user understandable explanation of the device error.
 */

u8 ide_dump_status(ide_drive_t *drive, const char *msg, u8 stat)
{
	u8 err = 0;

	printk(KERN_ERR "%s: %s: status=0x%02x { ", drive->name, msg, stat);
	if (stat & ATA_BUSY)
		printk(KERN_CONT "Busy ");
	else {
		if (stat & ATA_DRDY)
			printk(KERN_CONT "DriveReady ");
		if (stat & ATA_DF)
			printk(KERN_CONT "DeviceFault ");
		if (stat & ATA_DSC)
			printk(KERN_CONT "SeekComplete ");
		if (stat & ATA_DRQ)
			printk(KERN_CONT "DataRequest ");
		if (stat & ATA_CORR)
			printk(KERN_CONT "CorrectedError ");
		if (stat & ATA_IDX)
			printk(KERN_CONT "Index ");
		if (stat & ATA_ERR)
			printk(KERN_CONT "Error ");
	}
	printk(KERN_CONT "}\n");
	if ((stat & (ATA_BUSY | ATA_ERR)) == ATA_ERR) {
		err = ide_read_error(drive);
		printk(KERN_ERR "%s: %s: error=0x%02x ", drive->name, msg, err);
		if (drive->media == ide_disk)
			ide_dump_ata_error(drive, err);
		else
			ide_dump_atapi_error(drive, err);
	}
	ide_dump_opcode(drive);
	return err;
}
EXPORT_SYMBOL(ide_dump_status);
Commit	Line	Data
1da177e4 LT	1	#include <linux/types.h>
	2	#include <linux/string.h>
	3	#include <linux/kernel.h>
1da177e4	4	#include <linux/interrupt.h>
1da177e4 LT	5	#include <linux/ide.h>
	6	#include <linux/bitops.h>
	7
3ab7efe8 BZ	8	static const char *udma_str[] =
	9	{ "UDMA/16", "UDMA/25", "UDMA/33", "UDMA/44",
	10	"UDMA/66", "UDMA/100", "UDMA/133", "UDMA7" };
	11	static const char *mwdma_str[] =
	12	{ "MWDMA0", "MWDMA1", "MWDMA2" };
	13	static const char *swdma_str[] =
	14	{ "SWDMA0", "SWDMA1", "SWDMA2" };
	15	static const char *pio_str[] =
	16	{ "PIO0", "PIO1", "PIO2", "PIO3", "PIO4", "PIO5" };
1da177e4 LT	17
	18	/**
	19	* ide_xfer_verbose - return IDE mode names
3ab7efe8	20	* @mode: transfer mode
1da177e4 LT	21	*
	22	* Returns a constant string giving the name of the mode
	23	* requested.
	24	*/
	25
3ab7efe8	26	const char *ide_xfer_verbose(u8 mode)
1da177e4	27	{
3ab7efe8 BZ	28	const char *s;
	29	u8 i = mode & 0xf;
	30
	31	if (mode >= XFER_UDMA_0 && mode <= XFER_UDMA_7)
	32	s = udma_str[i];
	33	else if (mode >= XFER_MW_DMA_0 && mode <= XFER_MW_DMA_2)
	34	s = mwdma_str[i];
	35	else if (mode >= XFER_SW_DMA_0 && mode <= XFER_SW_DMA_2)
	36	s = swdma_str[i];
	37	else if (mode >= XFER_PIO_0 && mode <= XFER_PIO_5)
	38	s = pio_str[i & 0x7];
	39	else if (mode == XFER_PIO_SLOW)
	40	s = "PIO SLOW";
	41	else
	42	s = "XFER ERROR";
	43
	44	return s;
1da177e4	45	}
1da177e4 LT	46	EXPORT_SYMBOL(ide_xfer_verbose);
	47
	48	/**
2d5eaa6d BZ	49	* ide_rate_filter - filter transfer mode
2d5eaa6d BZ	50	* @drive: IDE device
1da177e4 LT	51	* @speed: desired speed
1da177e4 LT	52	*
2d5eaa6d	53	* Given the available transfer modes this function returns
1da177e4	54	* the best available speed at or below the speed requested.
2d5eaa6d	55	*
7670df73	56	* TODO: check device PIO capabilities
1da177e4 LT	57	*/
1da177e4 LT	58
f212ff28	59	static u8 ide_rate_filter(ide_drive_t *drive, u8 speed)
1da177e4	60	{
2d5eaa6d	61	ide_hwif_t *hwif = drive->hwif;
7670df73	62	u8 mode = ide_find_dma_mode(drive, speed);
2d5eaa6d	63
7670df73 BZ	64	if (mode == 0) {
	65	if (hwif->pio_mask)
	66	mode = fls(hwif->pio_mask) - 1 + XFER_PIO_0;
	67	else
	68	mode = XFER_PIO_4;
	69	}
1da177e4	70
eb63963a	71	/* printk("%s: mode 0x%02x, speed 0x%02x\n", __func__, mode, speed); */
1da177e4	72
2d5eaa6d	73	return min(speed, mode);
1da177e4 LT	74	}
1da177e4 LT	75
1da177e4 LT	76	/**
1da177e4 LT	77	* ide_get_best_pio_mode - get PIO mode from drive
81d368e0	78	* @drive: drive to consider
1da177e4	79	* @mode_wanted: preferred mode
81d368e0	80	* @max_mode: highest allowed mode
1da177e4 LT	81	*
	82	* This routine returns the recommended PIO settings for a given drive,
	83	* based on the drive->id information and the ide_pio_blacklist[].
1da177e4	84	*
81d368e0 SS	85	* Drive PIO mode is auto-selected if 255 is passed as mode_wanted.
81d368e0 SS	86	* This is used by most chipset support modules when "auto-tuning".
1da177e4 LT	87	*/
1da177e4 LT	88
2f996acb	89	u8 ide_get_best_pio_mode(ide_drive_t *drive, u8 mode_wanted, u8 max_mode)
1da177e4	90	{
4dde4492 BZ	91	u16 *id = drive->id;
4dde4492 BZ	92	int pio_mode = -1, overridden = 0;
1da177e4	93
6a824c92 BZ	94	if (mode_wanted != 255)
	95	return min_t(u8, mode_wanted, max_mode);
	96
4dde4492 BZ	97	if ((drive->hwif->host_flags & IDE_HFLAG_PIO_NO_BLACKLIST) == 0)
	98	pio_mode = ide_scan_pio_blacklist((char *)&id[ATA_ID_PROD]);
	99
	100	if (pio_mode != -1) {
342cdb6d	101	printk(KERN_INFO "%s: is on PIO blacklist\n", drive->name);
1da177e4	102	} else {
48fb2688	103	pio_mode = id[ATA_ID_OLD_PIO_MODES] >> 8;
1da177e4 LT	104	if (pio_mode > 2) { /* 2 is maximum allowed tPIO value */
	105	pio_mode = 2;
	106	overridden = 1;
	107	}
4dde4492 BZ	108
4dde4492 BZ	109	if (id[ATA_ID_FIELD_VALID] & 2) { /* ATA2? */
48fb2688	110	if (ata_id_has_iordy(id)) {
4dde4492	111	if (id[ATA_ID_PIO_MODES] & 7) {
1da177e4	112	overridden = 0;
4dde4492	113	if (id[ATA_ID_PIO_MODES] & 4)
1da177e4	114	pio_mode = 5;
4dde4492	115	else if (id[ATA_ID_PIO_MODES] & 2)
1da177e4 LT	116	pio_mode = 4;
	117	else
	118	pio_mode = 3;
	119	}
1da177e4 LT	120	}
	121	}
	122
342cdb6d BZ	123	if (overridden)
	124	printk(KERN_INFO "%s: tPIO > 2, assuming tPIO = 2\n",
	125	drive->name);
1da177e4	126	}
7dd00083 BZ	127
7dd00083 BZ	128	if (pio_mode > max_mode)
1da177e4	129	pio_mode = max_mode;
7dd00083	130
1da177e4 LT	131	return pio_mode;
1da177e4 LT	132	}
1da177e4 LT	133	EXPORT_SYMBOL_GPL(ide_get_best_pio_mode);
1da177e4 LT	134
26bcb879 BZ	135	/* req_pio == "255" for auto-tune */
	136	void ide_set_pio(ide_drive_t *drive, u8 req_pio)
	137	{
	138	ide_hwif_t *hwif = drive->hwif;
ac95beed	139	const struct ide_port_ops *port_ops = hwif->port_ops;
26bcb879 BZ	140	u8 host_pio, pio;
26bcb879 BZ	141
ac95beed	142	if (port_ops == NULL \|\| port_ops->set_pio_mode == NULL \|\|
784506cb	143	(hwif->host_flags & IDE_HFLAG_NO_SET_MODE))
26bcb879 BZ	144	return;
	145
	146	BUG_ON(hwif->pio_mask == 0x00);
	147
	148	host_pio = fls(hwif->pio_mask) - 1;
	149
	150	pio = ide_get_best_pio_mode(drive, req_pio, host_pio);
	151
	152	/*
	153	* TODO:
	154	* - report device max PIO mode
	155	* - check req_pio != 255 against device max PIO mode
	156	*/
	157	printk(KERN_DEBUG "%s: host max PIO%d wanted PIO%d%s selected PIO%d\n",
	158	drive->name, host_pio, req_pio,
	159	req_pio == 255 ? "(auto-tune)" : "", pio);
	160
88b2b32b	161	(void)ide_set_pio_mode(drive, XFER_PIO_0 + pio);
26bcb879	162	}
26bcb879 BZ	163	EXPORT_SYMBOL_GPL(ide_set_pio);
26bcb879 BZ	164
1da177e4 LT	165	/**
	166	* ide_toggle_bounce - handle bounce buffering
	167	* @drive: drive to update
	168	* @on: on/off boolean
	169	*
	170	* Enable or disable bounce buffering for the device. Drives move
	171	* between PIO and DMA and that changes the rules we need.
	172	*/
2f996acb	173
1da177e4 LT	174	void ide_toggle_bounce(ide_drive_t *drive, int on)
	175	{
	176	u64 addr = BLK_BOUNCE_HIGH; /* dma64_addr_t */
	177
6593178d JB	178	if (!PCI_DMA_BUS_IS_PHYS) {
	179	addr = BLK_BOUNCE_ANY;
	180	} else if (on && drive->media == ide_disk) {
36501650 BZ	181	struct device *dev = drive->hwif->dev;
	182
	183	if (dev && dev->dma_mask)
	184	addr = *dev->dma_mask;
1da177e4 LT	185	}
	186
	187	if (drive->queue)
	188	blk_queue_bounce_limit(drive->queue, addr);
	189	}
	190
88b2b32b BZ	191	int ide_set_pio_mode(ide_drive_t *drive, const u8 mode)
	192	{
	193	ide_hwif_t *hwif = drive->hwif;
ac95beed	194	const struct ide_port_ops *port_ops = hwif->port_ops;
88b2b32b	195
784506cb BZ	196	if (hwif->host_flags & IDE_HFLAG_NO_SET_MODE)
	197	return 0;
	198
ac95beed	199	if (port_ops == NULL \|\| port_ops->set_pio_mode == NULL)
88b2b32b BZ	200	return -1;
	201
	202	/*
	203	* TODO: temporary hack for some legacy host drivers that didn't
	204	* set transfer mode on the device in ->set_pio_mode method...
	205	*/
ac95beed BZ	206	if (port_ops->set_dma_mode == NULL) {
ac95beed BZ	207	port_ops->set_pio_mode(drive, mode - XFER_PIO_0);
88b2b32b BZ	208	return 0;
	209	}
	210
	211	if (hwif->host_flags & IDE_HFLAG_POST_SET_MODE) {
	212	if (ide_config_drive_speed(drive, mode))
	213	return -1;
ac95beed	214	port_ops->set_pio_mode(drive, mode - XFER_PIO_0);
88b2b32b BZ	215	return 0;
88b2b32b BZ	216	} else {
ac95beed	217	port_ops->set_pio_mode(drive, mode - XFER_PIO_0);
88b2b32b BZ	218	return ide_config_drive_speed(drive, mode);
	219	}
	220	}
	221
	222	int ide_set_dma_mode(ide_drive_t *drive, const u8 mode)
	223	{
	224	ide_hwif_t *hwif = drive->hwif;
ac95beed	225	const struct ide_port_ops *port_ops = hwif->port_ops;
88b2b32b	226
784506cb BZ	227	if (hwif->host_flags & IDE_HFLAG_NO_SET_MODE)
	228	return 0;
	229
ac95beed	230	if (port_ops == NULL \|\| port_ops->set_dma_mode == NULL)
88b2b32b BZ	231	return -1;
	232
	233	if (hwif->host_flags & IDE_HFLAG_POST_SET_MODE) {
	234	if (ide_config_drive_speed(drive, mode))
	235	return -1;
ac95beed	236	port_ops->set_dma_mode(drive, mode);
88b2b32b BZ	237	return 0;
88b2b32b BZ	238	} else {
ac95beed	239	port_ops->set_dma_mode(drive, mode);
88b2b32b BZ	240	return ide_config_drive_speed(drive, mode);
	241	}
	242	}
88b2b32b BZ	243	EXPORT_SYMBOL_GPL(ide_set_dma_mode);
88b2b32b BZ	244
1da177e4 LT	245	/**
	246	* ide_set_xfer_rate - set transfer rate
	247	* @drive: drive to set
88b2b32b	248	* @rate: speed to attempt to set
2f996acb	249	*
1da177e4 LT	250	* General helper for setting the speed of an IDE device. This
1da177e4 LT	251	* function knows about user enforced limits from the configuration
88b2b32b	252	* which ->set_pio_mode/->set_dma_mode does not.
1da177e4	253	*/
88b2b32b	254
1da177e4 LT	255	int ide_set_xfer_rate(ide_drive_t *drive, u8 rate)
1da177e4 LT	256	{
f212ff28	257	ide_hwif_t *hwif = drive->hwif;
ac95beed	258	const struct ide_port_ops *port_ops = hwif->port_ops;
f212ff28	259
ac95beed	260	if (port_ops == NULL \|\| port_ops->set_dma_mode == NULL \|\|
784506cb	261	(hwif->host_flags & IDE_HFLAG_NO_SET_MODE))
1da177e4	262	return -1;
f212ff28 BZ	263
	264	rate = ide_rate_filter(drive, rate);
	265
3b2a5c71 BZ	266	BUG_ON(rate < XFER_PIO_0);
3b2a5c71 BZ	267
88b2b32b BZ	268	if (rate >= XFER_PIO_0 && rate <= XFER_PIO_5)
88b2b32b BZ	269	return ide_set_pio_mode(drive, rate);
8f4dd2e4	270
88b2b32b	271	return ide_set_dma_mode(drive, rate);
1da177e4 LT	272	}
1da177e4 LT	273
1da177e4 LT	274	static void ide_dump_opcode(ide_drive_t *drive)
1da177e4 LT	275	{
b65fac32	276	struct request *rq = drive->hwif->rq;
7267c337	277	ide_task_t *task = NULL;
1da177e4	278
1da177e4 LT	279	if (!rq)
1da177e4 LT	280	return;
7267c337 BZ	281
	282	if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE)
	283	task = rq->special;
1da177e4	284
2f996acb	285	printk(KERN_ERR "ide: failed opcode was: ");
7267c337 BZ	286	if (task == NULL)
7267c337 BZ	287	printk(KERN_CONT "unknown\n");
1da177e4	288	else
7267c337	289	printk(KERN_CONT "0x%02x\n", task->tf.command);
1da177e4 LT	290	}
1da177e4 LT	291
a501633c	292	u64 ide_get_lba_addr(struct ide_taskfile *tf, int lba48)
c2b57cdc BZ	293	{
	294	u32 high, low;
	295
	296	if (lba48)
	297	high = (tf->hob_lbah << 16) \| (tf->hob_lbam << 8) \|
	298	tf->hob_lbal;
	299	else
	300	high = tf->device & 0xf;
	301	low = (tf->lbah << 16) \| (tf->lbam << 8) \| tf->lbal;
	302
	303	return ((u64)high << 24) \| low;
	304	}
a501633c	305	EXPORT_SYMBOL_GPL(ide_get_lba_addr);
c2b57cdc BZ	306
	307	static void ide_dump_sector(ide_drive_t *drive)
	308	{
	309	ide_task_t task;
	310	struct ide_taskfile *tf = &task.tf;
97100fc8	311	u8 lba48 = !!(drive->dev_flags & IDE_DFLAG_LBA48);
c2b57cdc BZ	312
	313	memset(&task, 0, sizeof(task));
	314	if (lba48)
	315	task.tf_flags = IDE_TFLAG_IN_LBA \| IDE_TFLAG_IN_HOB_LBA \|
	316	IDE_TFLAG_LBA48;
	317	else
	318	task.tf_flags = IDE_TFLAG_IN_LBA \| IDE_TFLAG_IN_DEVICE;
	319
374e042c	320	drive->hwif->tp_ops->tf_read(drive, &task);
c2b57cdc BZ	321
c2b57cdc BZ	322	if (lba48 \|\| (tf->device & ATA_LBA))
2f996acb	323	printk(KERN_CONT ", LBAsect=%llu",
1c904fcf	324	(unsigned long long)ide_get_lba_addr(tf, lba48));
c2b57cdc	325	else
2f996acb BZ	326	printk(KERN_CONT ", CHS=%d/%d/%d", (tf->lbah << 8) + tf->lbam,
2f996acb BZ	327	tf->device & 0xf, tf->lbal);
c2b57cdc BZ	328	}
c2b57cdc BZ	329
e62925dd	330	static void ide_dump_ata_error(ide_drive_t *drive, u8 err)
1da177e4	331	{
2f996acb BZ	332	printk(KERN_ERR "{ ");
	333	if (err & ATA_ABORTED)
	334	printk(KERN_CONT "DriveStatusError ");
3a7d2484	335	if (err & ATA_ICRC)
2f996acb BZ	336	printk(KERN_CONT "%s",
	337	(err & ATA_ABORTED) ? "BadCRC " : "BadSector ");
	338	if (err & ATA_UNC)
	339	printk(KERN_CONT "UncorrectableError ");
	340	if (err & ATA_IDNF)
	341	printk(KERN_CONT "SectorIdNotFound ");
	342	if (err & ATA_TRK0NF)
	343	printk(KERN_CONT "TrackZeroNotFound ");
	344	if (err & ATA_AMNF)
	345	printk(KERN_CONT "AddrMarkNotFound ");
	346	printk(KERN_CONT "}");
3a7d2484 BZ	347	if ((err & (ATA_BBK \| ATA_ABORTED)) == ATA_BBK \|\|
3a7d2484 BZ	348	(err & (ATA_UNC \| ATA_IDNF \| ATA_AMNF))) {
b65fac32 BZ	349	struct request *rq = drive->hwif->rq;
b65fac32 BZ	350
e62925dd	351	ide_dump_sector(drive);
b65fac32 BZ	352
b65fac32 BZ	353	if (rq)
2f996acb	354	printk(KERN_CONT ", sector=%llu",
b65fac32	355	(unsigned long long)rq->sector);
1da177e4	356	}
2f996acb	357	printk(KERN_CONT "\n");
e62925dd BZ	358	}
	359
	360	static void ide_dump_atapi_error(ide_drive_t *drive, u8 err)
	361	{
2f996acb BZ	362	printk(KERN_ERR "{ ");
	363	if (err & ATAPI_ILI)
	364	printk(KERN_CONT "IllegalLengthIndication ");
	365	if (err & ATAPI_EOM)
	366	printk(KERN_CONT "EndOfMedia ");
	367	if (err & ATA_ABORTED)
	368	printk(KERN_CONT "AbortedCommand ");
	369	if (err & ATA_MCR)
	370	printk(KERN_CONT "MediaChangeRequested ");
	371	if (err & ATAPI_LFS)
	372	printk(KERN_CONT "LastFailedSense=0x%02x ",
	373	(err & ATAPI_LFS) >> 4);
	374	printk(KERN_CONT "}\n");
1da177e4 LT	375	}
	376
	377	/**
e62925dd	378	* ide_dump_status - translate ATA/ATAPI error
1da177e4 LT	379	* @drive: drive that status applies to
	380	* @msg: text message to print
	381	* @stat: status byte to decode
	382	*
	383	* Error reporting, in human readable form (luxurious, but a memory hog).
e62925dd BZ	384	* Combines the drive name, message and status byte to provide a
e62925dd BZ	385	* user understandable explanation of the device error.
1da177e4 LT	386	*/
1da177e4 LT	387
e62925dd	388	u8 ide_dump_status(ide_drive_t drive, const char msg, u8 stat)
1da177e4	389	{
0e38a66a	390	u8 err = 0;
1da177e4	391
2f996acb	392	printk(KERN_ERR "%s: %s: status=0x%02x { ", drive->name, msg, stat);
3a7d2484	393	if (stat & ATA_BUSY)
2f996acb	394	printk(KERN_CONT "Busy ");
1da177e4	395	else {
2f996acb BZ	396	if (stat & ATA_DRDY)
	397	printk(KERN_CONT "DriveReady ");
	398	if (stat & ATA_DF)
	399	printk(KERN_CONT "DeviceFault ");
	400	if (stat & ATA_DSC)
	401	printk(KERN_CONT "SeekComplete ");
	402	if (stat & ATA_DRQ)
	403	printk(KERN_CONT "DataRequest ");
	404	if (stat & ATA_CORR)
	405	printk(KERN_CONT "CorrectedError ");
	406	if (stat & ATA_IDX)
	407	printk(KERN_CONT "Index ");
	408	if (stat & ATA_ERR)
	409	printk(KERN_CONT "Error ");
1da177e4	410	}
2f996acb	411	printk(KERN_CONT "}\n");
3a7d2484	412	if ((stat & (ATA_BUSY \| ATA_ERR)) == ATA_ERR) {
64a57fe4	413	err = ide_read_error(drive);
2f996acb	414	printk(KERN_ERR "%s: %s: error=0x%02x ", drive->name, msg, err);
e62925dd BZ	415	if (drive->media == ide_disk)
	416	ide_dump_ata_error(drive, err);
	417	else
	418	ide_dump_atapi_error(drive, err);
1da177e4 LT	419	}
1da177e4 LT	420	ide_dump_opcode(drive);
0e38a66a	421	return err;
1da177e4	422	}
1da177e4	423	EXPORT_SYMBOL(ide_dump_status);