On Fri, 20 Jan 2012 09:28:55 -0500
John Baldwin <j...@freebsd.org> wrote:
> On Friday, January 20, 2012 8:21:28 am Matthieu Volat wrote:
> > Hello,
> >
> > For a week, I have been trying to boot the FreeBSD 9 installation media
> (usb, cdrom) on a computer with an Asus P5-NE motherboard (amd64, nvidia
> MCP51
> controller), but the kernel fails to initialize correctly.
>
> I think the problem is with the nvidia chipset and MSI support. There's not
> an easy way to fix it via a tunable unfortunately. You can try hacking
> sys/dev/pci/pci.c to disable this code:
>
> #if defined(__i386__) || defined(__amd64__) || defined(__powerpc__)
> /*
> * Enable the MSI mapping window for all HyperTransport
> * slaves. PCI-PCI bridges have their windows enabled via
> * PCIB_MAP_MSI().
> */
> if (cfg->ht.ht_slave != 0 && cfg->ht.ht_msimap != 0 &&
> !(cfg->ht.ht_msictrl & PCIM_HTCMD_MSI_ENABLE)) {
> device_printf(pcib,
> "Enabling MSI window for HyperTransport slave at pci%d:%d:%d:%d\n",
> cfg->domain, cfg->bus, cfg->slot, cfg->func);
> cfg->ht.ht_msictrl |= PCIM_HTCMD_MSI_ENABLE;
> WREG(cfg->ht.ht_msimap + PCIR_HT_COMMAND, cfg->ht.ht_msictrl,
> 2);
> }
> #endif
>
> --
> John Baldwin
Thanks, you are absolutely right, I compiled a kernel disabling MSI-X support
and it booted.
I wonder how this worked previously and not now. From what I see, there is a
blacklist to disable unsupported chipsets...
Maybe this chipset should be added as a workaround (I wonder if I'm the only
one with the problem)...
The only references I found about MCP51 and MSI-X
(<http://lists.freebsd.org/pipermail/svn-src-head/2010-November/022551.html>)
seems to indicates that the chipset should work, but maybe with extra code...
I'm willing to test patches & so if somebody wants to have a look.
--
Matthieu Volat <ma...@alkumuna.eu>
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