6.0-current panic: loading radeon module
Eric Anholt
eta at lclark.edu
Sun Jun 26 19:18:28 GMT 2005
On Sun, 2005-06-26 at 12:57 -0600, M. Warner Losh wrote:
> In message: <1119809673.3817.3.camel at leguin>
> Eric Anholt <eta at 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.
--
Eric Anholt eta at lclark.edu
http://people.freebsd.org/~anholt/ anholt at FreeBSD.org
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