From owner-freebsd-amd64@FreeBSD.ORG Fri Dec 16 18:59:08 2005 Return-Path: X-Original-To: freebsd-amd64@FreeBSD.org Delivered-To: freebsd-amd64@FreeBSD.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 236A716A41F for ; Fri, 16 Dec 2005 18:59:08 +0000 (GMT) (envelope-from jkim@FreeBSD.org) Received: from anuket.mj.niksun.com (gwnew.niksun.com [65.115.46.162]) by mx1.FreeBSD.org (Postfix) with ESMTP id 3578143D5F for ; Fri, 16 Dec 2005 18:59:06 +0000 (GMT) (envelope-from jkim@FreeBSD.org) Received: from niksun.com (anuket [10.70.0.5]) by anuket.mj.niksun.com (8.13.1/8.13.1) with ESMTP id jBGJArS1080626; Fri, 16 Dec 2005 14:10:53 -0500 (EST) (envelope-from jkim@FreeBSD.org) From: Jung-uk Kim To: Eric Anholt Date: Fri, 16 Dec 2005 13:58:32 -0500 User-Agent: KMail/1.6.2 References: <43A1636A.6030108@mail.uni-mainz.de> <200512161230.41499.jkim@FreeBSD.org> <1134757662.1404.81.camel@leguin> In-Reply-To: <1134757662.1404.81.camel@leguin> MIME-Version: 1.0 Content-Disposition: inline Content-Type: text/plain; charset="euc-kr" Content-Transfer-Encoding: 7bit Message-Id: <200512161358.34963.jkim@FreeBSD.org> X-Virus-Scanned: ClamAV devel-20050919/1210/Thu Dec 15 10:23:22 2005 on anuket.mj.niksun.com X-Virus-Status: Clean Cc: "O. Hartmann" , freebsd-amd64@FreeBSD.org Subject: Re: device drm with PCIe? X-BeenThere: freebsd-amd64@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Porting FreeBSD to the AMD64 platform List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 16 Dec 2005 18:59:08 -0000 On Friday 16 December 2005 01:27 pm, Eric Anholt wrote: > On Fri, 2005-12-16 at 12:30 -0500, Jung-uk Kim wrote: > > On Thursday 15 December 2005 07:36 am, O. Hartmann wrote: > > > Normally 'device drm' is only useable in conjunction with > > > 'device agp'. A lot of amd64 based boxes now use PEG slots for > > > their graphics accelerators. Is it possible to utilize 'drm' > > > with PCIe devices? > > > > Yes. It should work, at least in theory. ;-) > > > > > Does device agp has any effect on PCIe graphics accelerators? > > > > No. You don't need it for PCI-Express controller. > > Now, this is stuff I don't 100% understand, but what I've figured > out so far is that for graphics, you're going to need a GART > somewhere. For their PCIE cards, ATI deals with this by doing > essentially the old PCIGART method but tweaked, in lieu of AGP. > Intel's PCIE graphics, on the other hand, has a GART on their chips > that is basically the same thing as their previous AGP GARTs, at > least in terms of programming. So we expose their gart through the > agp device still, even though the chipset may be PCIE. Ah, Eric is correct about the Intel part. But it was amd64 thread, so I just assumed... :-( Jung-uk Kim