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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: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
This commit is contained in:
Bartlomiej Zolnierkiewicz 2007-10-13 17:47:50 +02:00
parent 0b46ff2ea2
commit 75d7d963e3
3 changed files with 17 additions and 44 deletions
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37
drivers/ide/arm/icside.c
View File

@ -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 (ide_tune_dma(drive))
return 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;
}
out:
if (xfer_mode == 0)
return -1;
return icside_set_speed(drive, xfer_mode) ? -1 : 0;
return -1;
}
static int icside_dma_end(ide_drive_t *drive)

23
drivers/ide/ide-dma.c
View File

@ -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);

1
include/linux/ide.h
View File

@ -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);