Date: Mon, 27 Jun 2005 16:47:32 -0400 From: John Baldwin <jhb@FreeBSD.org> To: freebsd-current@freebsd.org Cc: cracauer@cons.org, Eric Anholt <eta@lclark.edu>, "M. Warner Losh" <imp@bsdimp.com> Subject: Re: 6.0-current panic: loading radeon module Message-ID: <200506271647.34208.jhb@FreeBSD.org> In-Reply-To: <1119813460.3817.17.camel@leguin> References: <1119650444.1173.105.camel@leguin> <20050626.125729.127901479.imp@bsdimp.com> <1119813460.3817.17.camel@leguin>
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On Sunday 26 June 2005 03:17 pm, Eric Anholt wrote: > On Sun, 2005-06-26 at 12:57 -0600, M. Warner Losh wrote: > > In message: <1119809673.3817.3.camel@leguin> > > > > Eric Anholt <eta@lclark.edu> writes: > > : On Fri, 2005-06-24 at 19:59 -0400, Martin Cracauer wrote: > > : > > I'd forgotten about this thread. I've got a proposed fix for this > > : > > at: http://www.freebsd.org/cgi/query-pr.cgi?pr=kern/80718 > > : > > > : > I get the same panic and backtrace with that patch (on a 32 MB > > : > moobile Radeon 7500). > > : > > > : > I will annotate the sourcecode now to verify (or not) the NULLs in > > : > the arguments for the bus argument. > > : > > : Thanks for showing that that patch didn't work. I should have > > : remembered why it wouldn't. The next step would be to try a > > : workaround: Comment out the two calls to drm_initmap() in radeon_cp.c. > > : > > : We really need a nice call to grab the start/offset of a pci resource > > : given the rid. We can avoid it now, but we might not be able to given > > : where the DRM is headed. > > > > rman_get_start() doesn't do the trick? Or do you need to know what it > > is before the bus_alloc_resource? If so, you can call > > bus_get_resource(). What is it that you need to know? > > bus_alloc_resource tries to map the 128+ MB framebuffer and pmap_mapdev > falls over. I'll take a look at bus_get_resource now. Try doing it without RF_ACTIVE. The problem there is that we really just want to allocate the resource so the backing physical addresses are reserved, but we don't want to actually map that into KVA. -- John Baldwin <jhb@FreeBSD.org> <>< http://www.FreeBSD.org/~jhb/ "Power Users Use the Power to Serve" = http://www.FreeBSD.org
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