Date: Sun, 14 Nov 2010 23:37:43 +0000 (UTC) From: Pyun YongHyeon <yongari@FreeBSD.org> To: cvs-src-old@freebsd.org Subject: cvs commit: src/sys/dev/nfe if_nfe.c Message-ID: <201011142337.oAENbxru022853@repoman.freebsd.org>
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yongari 2010-11-14 23:37:43 UTC
FreeBSD src repository
Modified files:
sys/dev/nfe if_nfe.c
Log:
SVN rev 215327 on 2010-11-14 23:37:43Z by yongari
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.
To workaround the issue, maintain a MSI/MSI-X black-list table in
driver and lookup base board manufacturer and product name from the
table before attempting to use MSI-X. If driver find an matching
entry, nfe(4) will not use MSI/MSI-X and fall back on traditional
INTx mode. This approach should be the last resort since it relies
on smbios and if another instance of MSI/MSI-X breakage is reported
with different maker/product, we may have to get the PCI bridge
black-listed instead of adding an new entry.
PR: kern/152150
Revision Changes Path
1.41 +43 -0 src/sys/dev/nfe/if_nfe.c
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