From owner-cvs-src@FreeBSD.ORG  Fri Mar  7 13:36:39 2008
Return-Path: <owner-cvs-src@FreeBSD.ORG>
Delivered-To: cvs-src@FreeBSD.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 7D7D5106566C;
	Fri,  7 Mar 2008 13:36:39 +0000 (UTC) (envelope-from jhb@FreeBSD.org)
Received: from repoman.freebsd.org (repoman.freebsd.org
	[IPv6:2001:4f8:fff6::29])
	by mx1.freebsd.org (Postfix) with ESMTP id 6C84C8FC2B;
	Fri,  7 Mar 2008 13:36:39 +0000 (UTC) (envelope-from jhb@FreeBSD.org)
Received: from repoman.freebsd.org (localhost [127.0.0.1])
	by repoman.freebsd.org (8.14.1/8.14.1) with ESMTP id m27Dad18045914;
	Fri, 7 Mar 2008 13:36:39 GMT (envelope-from jhb@repoman.freebsd.org)
Received: (from jhb@localhost)
	by repoman.freebsd.org (8.14.1/8.14.1/Submit) id m27DadeQ045913;
	Fri, 7 Mar 2008 13:36:39 GMT (envelope-from jhb)
Message-Id: <200803071336.m27DadeQ045913@repoman.freebsd.org>
From: John Baldwin <jhb@FreeBSD.org>
Date: Fri, 7 Mar 2008 13:36:39 +0000 (UTC)
To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org
X-FreeBSD-CVS-Branch: HEAD
Cc: 
Subject: cvs commit: src/sys/dev/agp agp_nvidia.c
X-BeenThere: cvs-src@freebsd.org
X-Mailman-Version: 2.1.5
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: Fri, 07 Mar 2008 13:36:39 -0000

jhb         2008-03-07 13:36:39 UTC

  FreeBSD src repository

  Modified files:
    sys/dev/agp          agp_nvidia.c 
  Log:
  Calculate the number of pages the GATT spans when reading from each page
  to flush the TLB instead of hardcoding a size of 33 pages.  Apertures of
  32MB and 64MB only use a 16 page GATT and an aperture of 128MB only uses
  a 32 page GATT, so without this the code could walk off the end of the
  pointer and cause a page fault if the next page was unmapped.  Also, for
  aperture sizes > 128MB, not all of the pages would be read.  The Linux
  driver has the same bug.
  
  MFC after:      1 week
  Tested by:      Frédéric PRACA  frederic.praca of freebsd-fr.org
  
  Revision  Changes    Path
  1.14      +4 -3      src/sys/dev/agp/agp_nvidia.c