[Nouveau] [Bug 15792] nv04 (TNT2) video blitter problem.

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=15792





--- Comment #14 from Stephane Marchesin <marchesin at icps.u-strasbg.fr>  2009-03-06 07:17:49 PST ---
(In reply to comment #12)
> (In reply to comment #11)
> > Ok, indeed it seems we can't catch the failing allocation itself. But still,
> > doing:
> > if (exaGetPixmapOffset(ppix) >= pNv->FB->size)
> > totally assumes that the FB is at the beggining of the EXA area. We've done
> > such asumptions before and they always break in the end. Is there no other way
> > ?
> > If all else fails, at least make it check agains FB->size and FB->offset.
> 
> As I understand it pNv->FB includes the entire EXA area, not just the visible
> fb, exaGetPixmapOffset returns an offset relative to pExaScr->info->memoryBase
> (set to pNv->FB->map in nouveau_exa.c), so to see if a pixmap is in VRAM isn't
> testing if the (unsigned) offset is bigger than pNv->FB->size [*] correct,
> regardless of the positioning of the visible fb?
> 
> [*] or equivalently pNv->EXADriverPtr->memorySize which is perhaps more robust
> to changes in nouveau
> 

Hmm right. Yea I suppose pNv->EXADriverPtr->memorySize is a better choice.


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