Re: 2.4.21-rc1-ac2 Promise IDE DMA won't work

From: Alan Cox (alan@lxorguk.ukuu.org.uk)
Date: Tue Apr 29 2003 - 15:55:16 EST


On Maw, 2003-04-29 at 21:15, Andre Hedrick wrote:
> The Promise chipset use a second DMA engine at offset 0x24 respective of
> the channel. Mixing an ATA and ATAPI on that channel is almost impossible
> to make the corner cases work. Next, if there us a 48-bit ATA plus ATAPI
> on the channel popping between the two enignes does not look sane at all
> because one has to swithc the location of the hwif->sgtable.

You can wrap that on the drivers for the disk stuff now but not cleanly for
the other cases. Is there any reason we can't use the ATAPI engine for
everything btw ?

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/



This archive was generated by hypermail 2b29 : Wed Apr 30 2003 - 22:00:32 EST