misc/179033: [dc] dc ethernet driver seems to have issues with some multiport card and mother board combinations

John Baldwin jhb at freebsd.org
Tue Jul 16 14:58:45 UTC 2013

On Wednesday, June 26, 2013 12:37:13 am Mr. Clif wrote:
> Hi John,
> Thanks for working on this. I'm very interested in getting this fixed 
> for everyone that uses the Affected Atom boards and other small format 
> boards that work well in small custom routers.
> However right now I have a big network upgrade I'm working on and don't 
> have time to get to it until late July, I'm hoping. So please forgive me 
> for the long delay.
>      Thanks for your help,
>      Clif

I've tested your specific case more by hacking the PCI bus driver to assign
a bogus range to my NIC on my netbook and verifying it rejected the request
and allocated a new range.  I did have to fix a bug though, so once you get
a chance to test, please test

http://www.freebsd.org/~jhb/patches/pci_isa_enable2.patch instead.

I will go ahead and commit a slightly cleaned up version (with less debugging)
today, but the patch above will output enough debugging to verify it is working
without requiring a verbose boot.

> John Baldwin wrote:
> > On Monday, June 10, 2013 3:13:11 pm Mr. Clif wrote:
> >> Hi John and Pyun,
> >>
> >> Ok got the new kernel installed and tested. Yes it works! :-) Maybe that
> >> will also fix a simular problem with the sun cards (cas[03]), except I
> >> don't see a define like that in if_cas.c. Suggestions?
> > So I have a possible "real" fix for this.  However, I do not have any hardware
> > I can find that has a PCI-PCI bridge with the ISA-enable bit set.  I know it
> > compiles and boots fine on other systems.  Can you please try this and capture
> > the dmesg output?  It would also be good to capture devinfo -u output before
> > and after.
> >
> > http://www.freebsd.org/~jhb/patches/pci_isa_enable.patch
> >

John Baldwin

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