Date: Mon, 20 Nov 2006 15:49:21 -0500 From: John Baldwin <jhb@freebsd.org> To: John Polstra <jdp@polstra.com> Cc: freebsd-arch@freebsd.org Subject: Re: Where do MSI quirks belong? Message-ID: <200611201549.21685.jhb@freebsd.org> In-Reply-To: <XFMail.20061120104911.jdp@polstra.com> References: <XFMail.20061120104911.jdp@polstra.com>
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On Monday 20 November 2006 13:49, John Polstra wrote: > On 20-Nov-2006 John Baldwin wrote: > > On Sunday 19 November 2006 23:11, John Polstra wrote: > >> First, I assume that whether MSI works or not is at least partially > >> a function of the motherboard and maybe the BIOS, as opposed to the > >> chipset. Is that right? At least on this Tyan board, there seem > >> to be some nice kenv variables (e.g., smbus.planar.product) already > >> set that could help me recognize the board. Is that a reasonable > >> approach? > > > > It's going to be a function of the chipset, as something in the chipset > > (presumably a Host -> PCI bridge) has to listen for writes to 0xfeeXXXXXX and > > convert them into APIC messages. > > Hmm, this Tyan 2721 board has the Intel E7501 chipset. Isn't it > supposed to support MSI? It doesn't work, and that's why I thought > the motherboard might also be a factor. I'll paste in the pciconf > output below. I'm not sure if 7501 works or not. Scott might know if there are errata for it. -- John Baldwin
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