Subject: Re: FDDI: PC/BIOS and MTU
To: Hal Murray <email@example.com>
From: Manuel Bouyer <firstname.lastname@example.org>
Date: 06/01/1999 11:34:28
On Tue, Jun 01, 1999 at 02:25:51AM -0700, Hal Murray wrote:
> Thanks. I poked around and only found a per-bus flag rather than
> one per board.
Maybe it was per-bus, I don't remember (and don't have the machine to check).
The fact is that it defaults to 'off', and I can't see any rationale for
this. This prevent most add-on boards from working.
> > The BIOS is supposed to turn it on, though some driver explicitely set the
> > bit to '1', just to be sure.
> I checked various drivers. Most of them turn it on. It looks like
> the same chunk of code was copied around.
> I was going to ask where that code was for the Tulip driver. I couldn't
> find it. Suprise. It doesn't work either.
I wonder if just tunring it on is enouth for all cases. I guess if the
chip is behind a pci-pci bridge which has not been configured for DMA it
will not work (but I may be wrong, I don't know PCI well enouth :)
Manuel Bouyer, LIP6, Universite Paris VI. Manuel.Bouyer@lip6.fr