Date: Mon, 14 Jun 2004 17:21:22 -0400 From: Jung-uk Kim <jkim@niksun.com> To: freebsd-amd64@freebsd.org Cc: freebsd-x11@freebsd.org Subject: Re: [PATCH] AMD64 On-CPU GART support + more Message-ID: <200406141721.22252.jkim@niksun.com> In-Reply-To: <200406141646.03171.jkim@niksun.com> References: <200406141646.03171.jkim@niksun.com>
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--Boundary-00=_SbhzAYUSvVxtkZr Content-Type: text/plain; charset="euc-kr" Content-Transfer-Encoding: 7bit Content-Disposition: inline On Monday 14 June 2004 04:46 pm, Jung-uk Kim wrote: > Since the latest DRM is imported, I made my AMD64 on-CPU GART[1] > working (patch attached). This driver has some ugliness because of > its nature: driver is for AGP bridge but directly touches north > bridge registers (of multiple north bridges if you have multiple > CPUs). Ideally we can attach child driver here for each bridge but > it is just a part of its functions so that I didn't want to create > a full-blown driver. The second ugliness comes from the agp_sis.c > and agp_via.c. They fall back to 'generic host to PCI bridge' if > it is not supported but it finds a bridge. I believe this has to > be removed. The kludge is 'AGP_AMD64_GART' in kernel > configuration. This kludge can be removed when the 'fallback' > match/probe is removed. For now, 'AGP_AMD64_GART' is required to > test this driver. If anyone is interested, please cleanup/fix them. > :-( Oops, agp_via.c has a bad merge. Sorry. Jung-uk Kim > It's tested with Via K8T800 (both FreeBSD/i386 and FreeBSD/amd64) > but it should work with other bridges/tunnels. XFree86 snapshot > (after Mesa 6.1 import) + DRI snapshot worked fine with MGA 400 and > Radeon RV280 in FreeBSD/i386. In FreeBSD/amd64, MGA 400 works but > Radeon RV280 doesn't work but I believe it's DRM/DRI's problem, i. > e., Radeon SAREA handles. > > Cheers, > > Jung-uk Kim > > [1] BIOS and Kernel Developer's Guide for AMD Athlon? 64 and AMD > Opteron(tm) Processors (3.6.12-15) > http://www.amd.com/us-en/assets/content_type/white_papers_and_tech_ >docs/26094.PDF > > * PS: I think the current agp_via.c doesn't support K8T800 or other > AGP v3 bridges correctly. If anyone is interested, let me know. > ;-) --Boundary-00=_SbhzAYUSvVxtkZr--
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