[CFT]Patch for dri / drm interoperability i386 world / amd64 kernel

[Konstantin Belousov]

On Sat, Aug 11, 2012 at 09:25:09AM +0800, Meowthink wrote:
> Hello all,
> 
> So long FreeBSD's DRI implementation lacks of i386/amd64
> interoperability, as discussed [0] [1]. This breaks wine, linuxulator
> etc. drawing using DRI-based OpenGL.
> Paul Mackerras et al. actually did that part for Linux implementation,
> so I simply translated their work to FreeBSD. Due to my poor
> programming skills, there's some limitations:
> 0. I tried to split compatible codes into separate files, like under
> Linux. But as a result of the difference between FreeBSD and Linux,
> the code is integrated in a  "#include ...ioc32.c" form which is not
> so elegant.
> 1. For same reason, struct drm_driver_info has to be changed.
I fixed 0 and 1 to my liking and committed the patch.

Thank you.

> 2. There should be some assertions if a 64-bit pointer failed to fit
> in a 32-bit space. Linux implementation didn't do this either, but
> they're guaranteed by user-space ioctl structures. This may result
> unstable under heavy load.
I am not sure what do you mean exactly. Can you elaborate, please ?
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