From owner-cvs-src@FreeBSD.ORG  Sat Sep 20 14:18:29 2003
Return-Path: <owner-cvs-src@FreeBSD.ORG>
Delivered-To: cvs-src@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP
	id 2E48B16A4BF; Sat, 20 Sep 2003 14:18:29 -0700 (PDT)
Received: from repoman.freebsd.org (repoman.freebsd.org [216.136.204.115])
	by mx1.FreeBSD.org (Postfix) with ESMTP
	id 4636343FE0; Sat, 20 Sep 2003 14:18:28 -0700 (PDT)
	(envelope-from wpaul@FreeBSD.org)
Received: from repoman.freebsd.org (localhost [127.0.0.1])
	by repoman.freebsd.org (8.12.9/8.12.9) with ESMTP id h8KLISXJ023194;
	Sat, 20 Sep 2003 14:18:28 -0700 (PDT)
	(envelope-from wpaul@repoman.freebsd.org)
Received: (from wpaul@localhost)
	by repoman.freebsd.org (8.12.9/8.12.9/Submit) id h8KLIR7u023193;
	Sat, 20 Sep 2003 14:18:27 -0700 (PDT)
	(envelope-from wpaul)
Message-Id: <200309202118.h8KLIR7u023193@repoman.freebsd.org>
From: Bill Paul <wpaul@FreeBSD.org>
Date: Sat, 20 Sep 2003 14:18:27 -0700 (PDT)
To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org,
	cvs-all@FreeBSD.org
X-FreeBSD-CVS-Branch: HEAD
Subject: cvs commit: src/sys/dev/re if_re.c
X-BeenThere: cvs-src@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
List-Id: CVS commit messages for the src tree <cvs-src.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/cvs-src>,
	<mailto:cvs-src-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/cvs-src>
List-Post: <mailto:cvs-src@freebsd.org>
List-Help: <mailto:cvs-src-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/cvs-src>,
	<mailto:cvs-src-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Sat, 20 Sep 2003 21:18:29 -0000

wpaul       2003/09/20 14:18:27 PDT

  FreeBSD src repository

  Modified files:
    sys/dev/re           if_re.c 
  Log:
  Remove the dual-address cycle stuff. DAC is used to allow a bus master
  device to access 64-bit addresses from a 32-bit PCI bus. While the
  RealTek manual says you can set this bit and the chip will perform
  DAC only if you give it a DMA address with any of the upper 32
  bits set, this appears not to be the case. If I turn on the DAC
  bit, the chip sets the 'system error' bit in the status register
  when I to do a DMA on my Athlon test box with 32-bit PCI bus (VIA
  chipset) even though I only have 128MB of physical memory, and thus
  can never give the chip a 64-bit address.
  
  Obviously, I can't just set it and forget it, so until I figure
  out the right rule for when it's safe/necessary to enable it, keep
  it turned off.
  
  Revision  Changes    Path
  1.10      +2 -4      src/sys/dev/re/if_re.c