Date: Wed, 5 Apr 2000 19:28:08 +1000 (EST) From: Andrew MacIntyre <andymac@bullseye.apana.org.au> To: Edwin Mons <e.mons@spcgroup.nl> Cc: Soren Schmidt <sos@freebsd.dk>, freebsd-stable@FreeBSD.ORG Subject: Re: ata sad combinatorics Message-ID: <Pine.OS2.3.95.1000405192532.1160A-100000@CENTRAL> In-Reply-To: <38E9EFE2.7F62E91E@spcgroup.nl>
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On Tue, 4 Apr 2000, Edwin Mons wrote:
> > The old Intel PIIX is know to have DMA problems, I never intended to
> > support it, but the current code (from luiqi IIRC) was found to be
> > sufficient IF the BIOS did its job right. I seems that we have a
> > BIOS here that doesn't setup things the way they should be, and the
> > DMA setup fails because of that. Is there any way you could upgrade
> > your BIOS ??
>
> I've seen similar problems with a machine with an old VIA chipset.
> FWIW: I think we need a way to tell the kernel before booting that it
> shouldn't even try to use DMA/UDMA. Something like the good old device
> flags..
Or inverting the defaults so that PIO is the default and sysctl is
required to enable DMA.
--
Andrew I MacIntyre "These thoughts are mine alone..."
E-mail: andrew.macintyre@aba.gov.au (work) | Snail: PO Box 370
andymac@bullseye.apana.org.au (play) | Belconnen ACT 2616
andymac@pcug.org.au (play2) | Australia
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