Date: Tue, 31 Aug 2010 00:15:20 +0000 (UTC) From: Pyun YongHyeon <yongari@FreeBSD.org> To: cvs-src-old@freebsd.org Subject: cvs commit: src/sys/pci if_rl.c Message-ID: <201008310015.o7V0Ff1G063053@repoman.freebsd.org>
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yongari 2010-08-31 00:15:20 UTC
FreeBSD src repository
Modified files: (Branch: RELENG_8)
sys/pci if_rl.c
Log:
SVN rev 212039 on 2010-08-31 00:15:20Z by yongari
MFC r211648:
It seems some newer RTL8139 controllers provides only memory space
register mapping. I'm not sure whether it comes from the fact that
controllers live behind certain PCI brdge(PLX PCI 6152 33BC) and
the bridge has some issues in handling I/O space register mapping.
Unfortunately it's not possible to narrow down to an exact
controller that shows this issue because RealTek used the same PCI
device/revision id again. In theory, it's possible to check parent
PCI bridge device and change rl(4) to use memory space register
mapping if the parent PCI bridge is PLX PCI 6152. But I didn't try
to do that and we wouldn't get much benefit with added complexity.
Blindly switching to use memory space register mapping for rl(4)
may make most old controllers not to work. At least, I don't want
to take potential risk from such change. So use I/O space register
mapping by default but give users chance to override it via a
tunable. The tunable to use memory space register mapping would be
given by adding the following line to /boot/loader.conf file.
dev.rl.%d.prefer_iomap="0"
This change makes P811B quad-port work with this tunable.
Revision Changes Path
1.189.2.3 +27 -23 src/sys/pci/if_rl.c
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