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Date:      Mon, 20 Nov 2006 15:59:20 -0800 (PST)
From:      John Polstra <jdp@polstra.com>
To:        Jack Vogel <jfvogel@gmail.com>
Cc:        freebsd-arch@freebsd.org
Subject:   Re: Where do MSI quirks belong?
Message-ID:  <XFMail.20061120155920.jdp@polstra.com>
In-Reply-To: <2a41acea0611201545s6a9848e2k952845f4ccedc04d@mail.gmail.com>

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On 20-Nov-2006 Jack Vogel wrote:
> On 11/20/06, John Baldwin <jhb@freebsd.org> wrote:
>> I'm not sure if 7501 works or not.  Scott might know if there are errata for
>> it.
> 
> I've looked at the specs for that chipset, and yes, it appears to have MSI.
> You're right though, for anything to work surely needs MB support as well.
> MSI is only going to work on PCI-X and PCI-E you know.
> 
> Earlier someone asserted quirks would be chipset based, you know
> one thing about Linux quirks is they don't tie them down to anything
> specific like that, its just some known issue with a way to detect it.
> I could imagine a motherboard maker that screws something up in
> their design so even if a chipset in theory supports MSI the thing
> still wont work, so I think we should be ready to handle that.
> 
> When you say it doesnt work, what are you trying to use it with, the
> E1000s?

Yes, it's the 82546EB that's on the motherboard.  When MSI is
enabled and I try to do anything with its network interfaces, the
system hangs solid (won't even echo console keystrokes) at least
half the time.  When it doesn't hang, I get TX watchdog timeouts on
both interfaces.  It works perfectly if I disable MSI.

John



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