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Commit 75d7d963 authored by Bartlomiej Zolnierkiewicz's avatar Bartlomiej Zolnierkiewicz
Browse files

icside: use ide_tune_dma() 



* Add "good DMA drives" hack for icside to ide-dma.c::ide_find_dma_mode()
  (in the long-term it should be either removed or generalized for all hosts).

* Use ide_tune_dma() in icside.c::icside_dma_check().

  This results in the following changes in behavior:
  - pre-EIDE SWDMA modes are now also respected
  - drive->autodma is checked instead of hwif->autodma
    (doesn't really matter as icside sets both to "1")

* Make ide-dma.c::__ide_dma_good_drive() static and drop "__" prefix.

Cc: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: default avatarBartlomiej Zolnierkiewicz <bzolnier@gmail.com>
parent 0b46ff2e

drivers/ide/arm/icside.c

+3 −34
Original line number Diff line number Diff line
@@ -313,41 +313,10 @@ static int icside_dma_on(ide_drive_t *drive) 


static int icside_dma_check(ide_drive_t *drive)

{

	struct hd_driveid *id = drive->id;

	ide_hwif_t *hwif = HWIF(drive);

	int xfer_mode = 0;



	if (!(id->capability & 1) || !hwif->autodma)

		goto out;



	/*

	 * Consult the list of known "bad" drives

	 */

	if (__ide_dma_bad_drive(drive))

		goto out;



	/*

	 * Enable DMA on any drive that has multiword DMA

	 */

	if (id->field_valid & 2) {

		xfer_mode = ide_max_dma_mode(drive);

		goto out;

	}



	/*

	 * Consult the list of known "good" drives

	 */

	if (__ide_dma_good_drive(drive)) {

		if (id->eide_dma_time > 150)

			goto out;

		xfer_mode = XFER_MW_DMA_1;

	}

	if (ide_tune_dma(drive))

		return 0;



out:

	if (xfer_mode == 0)

	return -1;



	return icside_set_speed(drive, xfer_mode) ? -1 : 0;

}



static int icside_dma_end(ide_drive_t *drive)

drivers/ide/ide-dma.c

+14 −9
Original line number Diff line number Diff line
@@ -169,6 +169,11 @@ ide_startstop_t ide_dma_intr (ide_drive_t *drive) 


EXPORT_SYMBOL_GPL(ide_dma_intr);



static int ide_dma_good_drive(ide_drive_t *drive)

{

	return ide_in_drive_list(drive->id, drive_whitelist);

}



#ifdef CONFIG_BLK_DEV_IDEDMA_PCI

/**

 *	ide_build_sglist	-	map IDE scatter gather for DMA I/O
@@ -357,7 +362,7 @@ static int config_drive_for_dma (ide_drive_t *drive) 
				return 0;



		/* Consult the list of known "good" drives */

		if (__ide_dma_good_drive(drive))

		if (ide_dma_good_drive(drive))

			return 0;

	}
@@ -639,14 +644,6 @@ int __ide_dma_bad_drive (ide_drive_t *drive) 


EXPORT_SYMBOL(__ide_dma_bad_drive);



int __ide_dma_good_drive (ide_drive_t *drive)

{

	struct hd_driveid *id = drive->id;

	return ide_in_drive_list(id, drive_whitelist);

}



EXPORT_SYMBOL(__ide_dma_good_drive);



static const u8 xfer_mode_bases[] = {

	XFER_UDMA_0,

	XFER_MW_DMA_0,
@@ -746,6 +743,14 @@ u8 ide_find_dma_mode(ide_drive_t *drive, u8 req_mode) 
		}

	}



	if (hwif->chipset == ide_acorn && mode == 0) {

		/*

		 * is this correct?

		 */

		if (ide_dma_good_drive(drive) && drive->id->eide_dma_time < 150)

			mode = XFER_MW_DMA_1;

	}



	printk(KERN_DEBUG "%s: selected mode 0x%x\n", drive->name, mode);



	return min(mode, req_mode);

include/linux/ide.h

+0 −1
Original line number Diff line number Diff line
@@ -1296,7 +1296,6 @@ int ide_in_drive_list(struct hd_driveid *, const struct drive_list_entry *); 


#ifdef CONFIG_BLK_DEV_IDEDMA

int __ide_dma_bad_drive(ide_drive_t *);

int __ide_dma_good_drive(ide_drive_t *);



u8 ide_find_dma_mode(ide_drive_t *, u8);