[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;
	ide_task_t *task = NULL;

	spin_lock(&ide_lock);
	rq = NULL;
	if (HWGROUP(drive))
		rq = HWGROUP(drive)->rq;
	spin_unlock(&ide_lock);
	if (!rq)
		return;

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

	printk("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(", LBAsect=%llu",
			(unsigned long long)ide_get_lba_addr(tf, lba48));
	else
		printk(", 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("{ ");
	if (err & ATA_ABORTED)	printk("DriveStatusError ");
	if (err & ATA_ICRC)
		printk((err & ATA_ABORTED) ? "BadCRC " : "BadSector ");
	if (err & ATA_UNC)	printk("UncorrectableError ");
	if (err & ATA_IDNF)	printk("SectorIdNotFound ");
	if (err & ATA_TRK0NF)	printk("TrackZeroNotFound ");
	if (err & ATA_AMNF)	printk("AddrMarkNotFound ");
	printk("}");
	if ((err & (ATA_BBK | ATA_ABORTED)) == ATA_BBK ||
	    (err & (ATA_UNC | ATA_IDNF | ATA_AMNF))) {
		ide_dump_sector(drive);
		if (HWGROUP(drive) && HWGROUP(drive)->rq)
			printk(", sector=%llu",
			       (unsigned long long)HWGROUP(drive)->rq->sector);
	}
	printk("\n");
}

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

	local_irq_save(flags);
	printk("%s: %s: status=0x%02x { ", drive->name, msg, stat);
	if (stat & ATA_BUSY)
		printk("Busy ");
	else {
		if (stat & ATA_DRDY)	printk("DriveReady ");
		if (stat & ATA_DF)	printk("DeviceFault ");
		if (stat & ATA_DSC)	printk("SeekComplete ");
		if (stat & ATA_DRQ)	printk("DataRequest ");
		if (stat & ATA_CORR)	printk("CorrectedError ");
		if (stat & ATA_IDX)	printk("Index ");
		if (stat & ATA_ERR)	printk("Error ");
	}
	printk("}\n");
	if ((stat & (ATA_BUSY | ATA_ERR)) == ATA_ERR) {
		err = ide_read_error(drive);
		printk("%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);
	local_irq_restore(flags);
	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 LT	45	}
	46
	47	EXPORT_SYMBOL(ide_xfer_verbose);
	48
	49	/**
2d5eaa6d BZ	50	* ide_rate_filter - filter transfer mode
2d5eaa6d BZ	51	* @drive: IDE device
1da177e4 LT	52	* @speed: desired speed
1da177e4 LT	53	*
2d5eaa6d	54	* Given the available transfer modes this function returns
1da177e4	55	* the best available speed at or below the speed requested.
2d5eaa6d	56	*
7670df73	57	* TODO: check device PIO capabilities
1da177e4 LT	58	*/
1da177e4 LT	59
f212ff28	60	static u8 ide_rate_filter(ide_drive_t *drive, u8 speed)
1da177e4	61	{
2d5eaa6d	62	ide_hwif_t *hwif = drive->hwif;
7670df73	63	u8 mode = ide_find_dma_mode(drive, speed);
2d5eaa6d	64
7670df73 BZ	65	if (mode == 0) {
	66	if (hwif->pio_mask)
	67	mode = fls(hwif->pio_mask) - 1 + XFER_PIO_0;
	68	else
	69	mode = XFER_PIO_4;
	70	}
1da177e4	71
eb63963a	72	/* printk("%s: mode 0x%02x, speed 0x%02x\n", __func__, mode, speed); */
1da177e4	73
2d5eaa6d	74	return min(speed, mode);
1da177e4 LT	75	}
1da177e4 LT	76
1da177e4 LT	77	/**
1da177e4 LT	78	* ide_get_best_pio_mode - get PIO mode from drive
81d368e0	79	* @drive: drive to consider
1da177e4	80	* @mode_wanted: preferred mode
81d368e0	81	* @max_mode: highest allowed mode
1da177e4 LT	82	*
	83	* This routine returns the recommended PIO settings for a given drive,
	84	* based on the drive->id information and the ide_pio_blacklist[].
1da177e4	85	*
81d368e0 SS	86	* Drive PIO mode is auto-selected if 255 is passed as mode_wanted.
81d368e0 SS	87	* This is used by most chipset support modules when "auto-tuning".
1da177e4 LT	88	*/
1da177e4 LT	89
2134758d	90	u8 ide_get_best_pio_mode (ide_drive_t *drive, u8 mode_wanted, u8 max_mode)
1da177e4	91	{
4dde4492 BZ	92	u16 *id = drive->id;
4dde4492 BZ	93	int pio_mode = -1, overridden = 0;
1da177e4	94
6a824c92 BZ	95	if (mode_wanted != 255)
	96	return min_t(u8, mode_wanted, max_mode);
	97
4dde4492 BZ	98	if ((drive->hwif->host_flags & IDE_HFLAG_PIO_NO_BLACKLIST) == 0)
	99	pio_mode = ide_scan_pio_blacklist((char *)&id[ATA_ID_PROD]);
	100
	101	if (pio_mode != -1) {
342cdb6d	102	printk(KERN_INFO "%s: is on PIO blacklist\n", drive->name);
1da177e4	103	} else {
48fb2688	104	pio_mode = id[ATA_ID_OLD_PIO_MODES] >> 8;
1da177e4 LT	105	if (pio_mode > 2) { /* 2 is maximum allowed tPIO value */
	106	pio_mode = 2;
	107	overridden = 1;
	108	}
4dde4492 BZ	109
4dde4492 BZ	110	if (id[ATA_ID_FIELD_VALID] & 2) { /* ATA2? */
48fb2688	111	if (ata_id_has_iordy(id)) {
4dde4492	112	if (id[ATA_ID_PIO_MODES] & 7) {
1da177e4	113	overridden = 0;
4dde4492	114	if (id[ATA_ID_PIO_MODES] & 4)
1da177e4	115	pio_mode = 5;
4dde4492	116	else if (id[ATA_ID_PIO_MODES] & 2)
1da177e4 LT	117	pio_mode = 4;
	118	else
	119	pio_mode = 3;
	120	}
1da177e4 LT	121	}
	122	}
	123
342cdb6d BZ	124	if (overridden)
	125	printk(KERN_INFO "%s: tPIO > 2, assuming tPIO = 2\n",
	126	drive->name);
1da177e4	127	}
7dd00083 BZ	128
7dd00083 BZ	129	if (pio_mode > max_mode)
1da177e4	130	pio_mode = max_mode;
7dd00083	131
1da177e4 LT	132	return pio_mode;
	133	}
	134
	135	EXPORT_SYMBOL_GPL(ide_get_best_pio_mode);
	136
26bcb879 BZ	137	/* req_pio == "255" for auto-tune */
	138	void ide_set_pio(ide_drive_t *drive, u8 req_pio)
	139	{
	140	ide_hwif_t *hwif = drive->hwif;
ac95beed	141	const struct ide_port_ops *port_ops = hwif->port_ops;
26bcb879 BZ	142	u8 host_pio, pio;
26bcb879 BZ	143
ac95beed	144	if (port_ops == NULL \|\| port_ops->set_pio_mode == NULL \|\|
784506cb	145	(hwif->host_flags & IDE_HFLAG_NO_SET_MODE))
26bcb879 BZ	146	return;
	147
	148	BUG_ON(hwif->pio_mask == 0x00);
	149
	150	host_pio = fls(hwif->pio_mask) - 1;
	151
	152	pio = ide_get_best_pio_mode(drive, req_pio, host_pio);
	153
	154	/*
	155	* TODO:
	156	* - report device max PIO mode
	157	* - check req_pio != 255 against device max PIO mode
	158	*/
	159	printk(KERN_DEBUG "%s: host max PIO%d wanted PIO%d%s selected PIO%d\n",
	160	drive->name, host_pio, req_pio,
	161	req_pio == 255 ? "(auto-tune)" : "", pio);
	162
88b2b32b	163	(void)ide_set_pio_mode(drive, XFER_PIO_0 + pio);
26bcb879 BZ	164	}
	165
	166	EXPORT_SYMBOL_GPL(ide_set_pio);
	167
1da177e4 LT	168	/**
	169	* ide_toggle_bounce - handle bounce buffering
	170	* @drive: drive to update
	171	* @on: on/off boolean
	172	*
	173	* Enable or disable bounce buffering for the device. Drives move
	174	* between PIO and DMA and that changes the rules we need.
	175	*/
	176
	177	void ide_toggle_bounce(ide_drive_t *drive, int on)
	178	{
	179	u64 addr = BLK_BOUNCE_HIGH; /* dma64_addr_t */
	180
6593178d JB	181	if (!PCI_DMA_BUS_IS_PHYS) {
	182	addr = BLK_BOUNCE_ANY;
	183	} else if (on && drive->media == ide_disk) {
36501650 BZ	184	struct device *dev = drive->hwif->dev;
	185
	186	if (dev && dev->dma_mask)
	187	addr = *dev->dma_mask;
1da177e4 LT	188	}
	189
	190	if (drive->queue)
	191	blk_queue_bounce_limit(drive->queue, addr);
	192	}
	193
88b2b32b BZ	194	int ide_set_pio_mode(ide_drive_t *drive, const u8 mode)
	195	{
	196	ide_hwif_t *hwif = drive->hwif;
ac95beed	197	const struct ide_port_ops *port_ops = hwif->port_ops;
88b2b32b	198
784506cb BZ	199	if (hwif->host_flags & IDE_HFLAG_NO_SET_MODE)
	200	return 0;
	201
ac95beed	202	if (port_ops == NULL \|\| port_ops->set_pio_mode == NULL)
88b2b32b BZ	203	return -1;
	204
	205	/*
	206	* TODO: temporary hack for some legacy host drivers that didn't
	207	* set transfer mode on the device in ->set_pio_mode method...
	208	*/
ac95beed BZ	209	if (port_ops->set_dma_mode == NULL) {
ac95beed BZ	210	port_ops->set_pio_mode(drive, mode - XFER_PIO_0);
88b2b32b BZ	211	return 0;
	212	}
	213
	214	if (hwif->host_flags & IDE_HFLAG_POST_SET_MODE) {
	215	if (ide_config_drive_speed(drive, mode))
	216	return -1;
ac95beed	217	port_ops->set_pio_mode(drive, mode - XFER_PIO_0);
88b2b32b BZ	218	return 0;
88b2b32b BZ	219	} else {
ac95beed	220	port_ops->set_pio_mode(drive, mode - XFER_PIO_0);
88b2b32b BZ	221	return ide_config_drive_speed(drive, mode);
	222	}
	223	}
	224
	225	int ide_set_dma_mode(ide_drive_t *drive, const u8 mode)
	226	{
	227	ide_hwif_t *hwif = drive->hwif;
ac95beed	228	const struct ide_port_ops *port_ops = hwif->port_ops;
88b2b32b	229
784506cb BZ	230	if (hwif->host_flags & IDE_HFLAG_NO_SET_MODE)
	231	return 0;
	232
ac95beed	233	if (port_ops == NULL \|\| port_ops->set_dma_mode == NULL)
88b2b32b BZ	234	return -1;
	235
	236	if (hwif->host_flags & IDE_HFLAG_POST_SET_MODE) {
	237	if (ide_config_drive_speed(drive, mode))
	238	return -1;
ac95beed	239	port_ops->set_dma_mode(drive, mode);
88b2b32b BZ	240	return 0;
88b2b32b BZ	241	} else {
ac95beed	242	port_ops->set_dma_mode(drive, mode);
88b2b32b BZ	243	return ide_config_drive_speed(drive, mode);
	244	}
	245	}
	246
	247	EXPORT_SYMBOL_GPL(ide_set_dma_mode);
	248
1da177e4 LT	249	/**
	250	* ide_set_xfer_rate - set transfer rate
	251	* @drive: drive to set
88b2b32b	252	* @rate: speed to attempt to set
1da177e4 LT	253	*
	254	* General helper for setting the speed of an IDE device. This
	255	* function knows about user enforced limits from the configuration
88b2b32b	256	* which ->set_pio_mode/->set_dma_mode does not.
1da177e4	257	*/
88b2b32b	258
1da177e4 LT	259	int ide_set_xfer_rate(ide_drive_t *drive, u8 rate)
1da177e4 LT	260	{
f212ff28	261	ide_hwif_t *hwif = drive->hwif;
ac95beed	262	const struct ide_port_ops *port_ops = hwif->port_ops;
f212ff28	263
ac95beed	264	if (port_ops == NULL \|\| port_ops->set_dma_mode == NULL \|\|
784506cb	265	(hwif->host_flags & IDE_HFLAG_NO_SET_MODE))
1da177e4	266	return -1;
f212ff28 BZ	267
	268	rate = ide_rate_filter(drive, rate);
	269
3b2a5c71 BZ	270	BUG_ON(rate < XFER_PIO_0);
3b2a5c71 BZ	271
88b2b32b BZ	272	if (rate >= XFER_PIO_0 && rate <= XFER_PIO_5)
88b2b32b BZ	273	return ide_set_pio_mode(drive, rate);
8f4dd2e4	274
88b2b32b	275	return ide_set_dma_mode(drive, rate);
1da177e4 LT	276	}
1da177e4 LT	277
1da177e4 LT	278	static void ide_dump_opcode(ide_drive_t *drive)
	279	{
	280	struct request *rq;
7267c337	281	ide_task_t *task = NULL;
1da177e4 LT	282
	283	spin_lock(&ide_lock);
	284	rq = NULL;
	285	if (HWGROUP(drive))
	286	rq = HWGROUP(drive)->rq;
	287	spin_unlock(&ide_lock);
	288	if (!rq)
	289	return;
7267c337 BZ	290
	291	if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE)
	292	task = rq->special;
1da177e4 LT	293
1da177e4 LT	294	printk("ide: failed opcode was: ");
7267c337 BZ	295	if (task == NULL)
7267c337 BZ	296	printk(KERN_CONT "unknown\n");
1da177e4	297	else
7267c337	298	printk(KERN_CONT "0x%02x\n", task->tf.command);
1da177e4 LT	299	}
1da177e4 LT	300
a501633c	301	u64 ide_get_lba_addr(struct ide_taskfile *tf, int lba48)
c2b57cdc BZ	302	{
	303	u32 high, low;
	304
	305	if (lba48)
	306	high = (tf->hob_lbah << 16) \| (tf->hob_lbam << 8) \|
	307	tf->hob_lbal;
	308	else
	309	high = tf->device & 0xf;
	310	low = (tf->lbah << 16) \| (tf->lbam << 8) \| tf->lbal;
	311
	312	return ((u64)high << 24) \| low;
	313	}
a501633c	314	EXPORT_SYMBOL_GPL(ide_get_lba_addr);
c2b57cdc BZ	315
	316	static void ide_dump_sector(ide_drive_t *drive)
	317	{
	318	ide_task_t task;
	319	struct ide_taskfile *tf = &task.tf;
97100fc8	320	u8 lba48 = !!(drive->dev_flags & IDE_DFLAG_LBA48);
c2b57cdc BZ	321
	322	memset(&task, 0, sizeof(task));
	323	if (lba48)
	324	task.tf_flags = IDE_TFLAG_IN_LBA \| IDE_TFLAG_IN_HOB_LBA \|
	325	IDE_TFLAG_LBA48;
	326	else
	327	task.tf_flags = IDE_TFLAG_IN_LBA \| IDE_TFLAG_IN_DEVICE;
	328
374e042c	329	drive->hwif->tp_ops->tf_read(drive, &task);
c2b57cdc BZ	330
c2b57cdc BZ	331	if (lba48 \|\| (tf->device & ATA_LBA))
1c904fcf AM	332	printk(", LBAsect=%llu",
1c904fcf AM	333	(unsigned long long)ide_get_lba_addr(tf, lba48));
c2b57cdc BZ	334	else
	335	printk(", CHS=%d/%d/%d", (tf->lbah << 8) + tf->lbam,
	336	tf->device & 0xf, tf->lbal);
	337	}
	338
e62925dd	339	static void ide_dump_ata_error(ide_drive_t *drive, u8 err)
1da177e4	340	{
e62925dd	341	printk("{ ");
3a7d2484 BZ	342	if (err & ATA_ABORTED) printk("DriveStatusError ");
	343	if (err & ATA_ICRC)
	344	printk((err & ATA_ABORTED) ? "BadCRC " : "BadSector ");
	345	if (err & ATA_UNC) printk("UncorrectableError ");
	346	if (err & ATA_IDNF) printk("SectorIdNotFound ");
	347	if (err & ATA_TRK0NF) printk("TrackZeroNotFound ");
	348	if (err & ATA_AMNF) printk("AddrMarkNotFound ");
e62925dd	349	printk("}");
3a7d2484 BZ	350	if ((err & (ATA_BBK \| ATA_ABORTED)) == ATA_BBK \|\|
3a7d2484 BZ	351	(err & (ATA_UNC \| ATA_IDNF \| ATA_AMNF))) {
e62925dd BZ	352	ide_dump_sector(drive);
	353	if (HWGROUP(drive) && HWGROUP(drive)->rq)
	354	printk(", sector=%llu",
	355	(unsigned long long)HWGROUP(drive)->rq->sector);
1da177e4	356	}
e62925dd BZ	357	printk("\n");
	358	}
	359
	360	static void ide_dump_atapi_error(ide_drive_t *drive, u8 err)
	361	{
	362	printk("{ ");
3a7d2484 BZ	363	if (err & ATAPI_ILI) printk("IllegalLengthIndication ");
	364	if (err & ATAPI_EOM) printk("EndOfMedia ");
	365	if (err & ATA_ABORTED) printk("AbortedCommand ");
	366	if (err & ATA_MCR) printk("MediaChangeRequested ");
	367	if (err & ATAPI_LFS) printk("LastFailedSense=0x%02x ",
	368	(err & ATAPI_LFS) >> 4);
13bbbf28	369	printk("}\n");
1da177e4 LT	370	}
	371
	372	/**
e62925dd	373	* ide_dump_status - translate ATA/ATAPI error
1da177e4 LT	374	* @drive: drive that status applies to
	375	* @msg: text message to print
	376	* @stat: status byte to decode
	377	*
	378	* Error reporting, in human readable form (luxurious, but a memory hog).
e62925dd BZ	379	* Combines the drive name, message and status byte to provide a
e62925dd BZ	380	* user understandable explanation of the device error.
1da177e4 LT	381	*/
1da177e4 LT	382
e62925dd	383	u8 ide_dump_status(ide_drive_t drive, const char msg, u8 stat)
1da177e4 LT	384	{
1da177e4 LT	385	unsigned long flags;
0e38a66a	386	u8 err = 0;
1da177e4	387
3d1c1cc9	388	local_irq_save(flags);
1da177e4	389	printk("%s: %s: status=0x%02x { ", drive->name, msg, stat);
3a7d2484	390	if (stat & ATA_BUSY)
1da177e4 LT	391	printk("Busy ");
1da177e4 LT	392	else {
3a7d2484 BZ	393	if (stat & ATA_DRDY) printk("DriveReady ");
	394	if (stat & ATA_DF) printk("DeviceFault ");
	395	if (stat & ATA_DSC) printk("SeekComplete ");
	396	if (stat & ATA_DRQ) printk("DataRequest ");
	397	if (stat & ATA_CORR) printk("CorrectedError ");
	398	if (stat & ATA_IDX) printk("Index ");
	399	if (stat & ATA_ERR) printk("Error ");
1da177e4 LT	400	}
1da177e4 LT	401	printk("}\n");
3a7d2484	402	if ((stat & (ATA_BUSY \| ATA_ERR)) == ATA_ERR) {
64a57fe4	403	err = ide_read_error(drive);
e62925dd BZ	404	printk("%s: %s: error=0x%02x ", drive->name, msg, err);
	405	if (drive->media == ide_disk)
	406	ide_dump_ata_error(drive, err);
	407	else
	408	ide_dump_atapi_error(drive, err);
1da177e4 LT	409	}
	410	ide_dump_opcode(drive);
	411	local_irq_restore(flags);
0e38a66a	412	return err;
1da177e4 LT	413	}
1da177e4 LT	414
1da177e4	415	EXPORT_SYMBOL(ide_dump_status);