Re: Improved DRM support for cant_use_aperture platforms

From: Michel Dänzer (michel@daenzer.net)
Date: Mon May 12 2003 - 16:21:28 EST


On Mon, 2003-05-12 at 22:19, David Mosberger wrote:
> >>>>> On 12 May 2003 21:48:31 +0200, Michel Dänzer <michel@daenzer.net> said:
>
> >> using an old kernel that doesn't have asm/agp.h yet?).
>
> Michel> That's it.
>
> OK, thanks for clarifying.
>
> Michel> So we have to check the version before #including
> Michel> <asm/agp.h>. Then, we can do something like
>
> Michel> #ifndef PAGE_AGP #define PAGE_AGP PAGE_KERNEL_NOCACHE #endif
>
> Michel> Or am I missing something?
>
> Basically correct, except that the patch also needs an improved
> version of vmap(), which was introduced in 2.5.68 only (IIRC). I'll
> update my patch so it is a no-op unless you have a kernel >= 2.5.68.

Hmm, isn't there a way to make it work with older kernels as well? For
reference, we've been using
http://www.penguinppc.org/~daenzer/DRI/drm-ioremapagp.diff by Benjamin
Herrenschmidt for a while for Apple UniNorth northbridges. I was hoping
to replace it with a cleaner solution like yours.

Anyway, after applying your second patch, things looked much better, and
the attached patch against the DRI CVS trunk builds without warnings
here.

-- 
Earthling Michel Dänzer   \  Debian (powerpc), XFree86 and DRI developer
Software libre enthusiast  \     http://svcs.affero.net/rm.php?r=daenzer


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