From owner-freebsd-alpha  Sat May 20 18: 3:13 2000
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From: Andrew Gallatin <gallatin@cs.duke.edu>
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Date: Sat, 20 May 2000 21:03:00 -0400 (EDT)
To: John Polstra <jdp@polstra.com>
Cc: alpha@FreeBSD.ORG
Subject: Re: Trouble with dc driver and DE500-BA card
In-Reply-To: <XFMail.000520135732.jdp@polstra.com>
References: <XFMail.000520135732.jdp@polstra.com>
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John Polstra writes:
 > I tried backing up to revision 1.8 of if_dc.c to remove this commit:
 > 
 >     msmith      2000/03/10 21:20:58 PST
 > 
 >       Modified files:
 >         sys/pci              if_dc.c if_dcreg.h 
 >       Log:
 >       Teach the 'dc' driver how to pick up settings left over by the
 >       SRM on alpha systems.  This is an expedient if not entirely
 >       elegant solution to the problem.
 > 
 > It didn't help.  (BTW, what is "the problem" referred to in that log
 > message?)

The problem is a POLA violation -- every other alpha OS obeys the SRM
settings by default.

With this patch, if you do:

>>> set ewa0_mode FastFD

The driver will choose 100baseTX <full-duplex> when ifconfig'ed with
no args.  Without this patch, it attempts to autonegotiate.  Given the
demonstrated inability of the dc driver to autonegotiate its way out
of a wet paper bag with a sharp knife, this causes problems.

I've found that if I hardcode the switch port AND the adapter to
100baseTX <full-duplex>, everything works just dandy.  Well... except
for the adapter's LEDs don't work, but I don't really care about that.

Cheers,

Drew








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