svn commit: r215327 - head/sys/dev/nfe

[Alexander Motin]

Pyun YongHyeon wrote:
> Author: yongari
> Date: Sun Nov 14 23:37:43 2010
> New Revision: 215327
> URL: http://svn.freebsd.org/changeset/base/215327
> 
> Log:
>   P5N32-SLI PREMIUM from ASUSTeK is known to have MSI/MSI-X issue
>   such that nfe(4) does not work with MSI-X. When MSI-X support was
>   introduced, I remember MCP55 controller worked without problems so
>   the issue could be either PCI bridge or BIOS issue. But I also
>   noticed snd_hda(4) disabled MSI on all MCP55 chipset so I'm still
>   not sure this is generic issue of MCP55 chipset. If this was PCI
>   bridge issue we would have added it to a system wide black-list
>   table but it's not clear to me at this moment whether it was caused
>   by either broken BIOS or silicon bug of MCP55 chipset.

MCP5x seem to be infinite source of surprises. Some reports I remember:
 - snd_hda not working with MSI enabled - AFAIR not just loosing
interrupts but completely stops responding;
 - using regular HPET interrupts breaks HDA sound after some time
(interrupts are not shared), while legacy_route mode operates properly;
 - at least on one system I've seen non-functioning SATA interrupts.
It would be nice to find what's going on there. I've got tired to add
workarounds for it. :(

-- 
Alexander Motin