The chipset claims to be "simplex", meaning that DMA can only be used
on one interface at a time. This is a broken design, and our IDE driver
does not bother even trying to manage DMA on such setups.
I might add something in 2.3.xx for it.
> Anyway, DMA is not the only strange thing with this motherboard under linux: I can't neither set any PIO mode!! Does not work neither ``hdparm -p<anything> /dev/hda'' or ``echo "pio_mode:3">/proc/ide/hda/settings'' (linux-2.1.95).
Linux does NOT include support for setting chipset modes for PCI
IDE interfaces. Instead, you can write your own user-mode bit-twiddler
that uses the /proc/ide/*/config interface to *safely* update the
chipset settings on the fly.
-- mlord@pobox.com The Linux IDE guy- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.rutgers.edu