[PATCH] add EXA relocation function

[Michel Dänzer]

On Fri, 2007-12-07 at 13:33 -0800, Jesse Barnes wrote:
> In order to avoid having a fixed offset for the EXA offscreen area (which is 
> nice if the driver is using TTM) drivers need to update the base offset of 
> EXA memory in EnterVT, and may need to update any private pointers they've 
> allocated as well (e.g. for the cursor or scanout buffers, etc.).
> 
> Since the server already kicks out all the pixmaps at VT switch time, the 
> relocation is trivial and will typically just involve the one, big free area 
> and any locked driver allocations; this function reflects that.
> 
> One possible enhancement would be to call back into a driver provided function 
> to update the private allocations, but it wouldn't really save any code...
> 
> Any thoughts on this?

I'm not sure it's really worth it, compared to using the existing
CreatePixmap hook for allocating pixmaps from a generic memory manager
such as TTM in the first place. Is there anything the latter can't do
that the former can?


-- 
Earthling Michel Dänzer           |          http://tungstengraphics.com
Libre software enthusiast         |          Debian, X and DRI developer