ide: move xfer mode tuning code to ide-xfer-mode.c

* Move xfer mode tuning code to ide-xfer-mode.c.

* Add CONFIG_IDE_XFER_MODE config option to be selected by host drivers
  that support xfer mode tuning.

* Add CONFIG_IDE_XFER_MODE=n static inline versions of ide_set_pio()
  and ide_set_xfer_rate().

* Make IDE_TIMINGS and BLK_DEV_IDEDMA config options select IDE_XFER_MODE,
  also add explicit selects for few host drivers that need it.

* Build/link ide-xfer-mode.o and ide-pio-blacklist.o (it is needed only
  by ide-xfer-mode.o) only if CONFIG_IDE_XFER_MODE=y.

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

1 files changed, 0 insertions, 240 deletions

diff --git a/drivers/ide/ide-lib.c b/drivers/ide/ide-lib.c
index 09526a0de73..f6c683dd298 100644
--- a/drivers/ide/ide-lib.c
+++ b/drivers/ide/ide-lib.c
@@ -5,163 +5,6 @@
 #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
@@ -188,89 +31,6 @@ void ide_toggle_bounce(ide_drive_t *drive, int on)
 		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;