static int
acer_dma_init(void *v, int channel, int drive, void *databuf,
size_t datalen, int flags)
{
/* use PIO for LBA48 transfer */
if (flags & WDC_DMA_LBA48)
return EINVAL;
return pciide_dma_init(v, channel, drive, databuf, datalen, flags);
}
static int
piix_dma_init(void *v, int channel, int drive, void *databuf,
size_t datalen, int flags)
{
/* use PIO for unaligned transfer */
if (((uintptr_t)databuf) & 0x1)
return EINVAL;
return pciide_dma_init(v, channel, drive, databuf, datalen, flags);
}
static int
geodeide_dma_init(void *v, int channel, int drive, void *databuf,
size_t datalen, int flags)
{
/*
* If the buffer is not properly aligned, we can't allow DMA
* and need to fall back to PIO.
*/
if (((uintptr_t)databuf) & 0xf)
return (EINVAL);
return (pciide_dma_init(v, channel, drive, databuf, datalen, flags));
}
