--- Patrick McFarland <[EMAIL PROTECTED]> wrote:
> On 05-Jun-2004, Ville Syrj?l? wrote:
> > On Sat, Jun 05, 2004 at 12:41:33PM +0200, Michel D?nzer wrote:
> > > I'm not sure about that; pseudo-command buffers that the DRM parses
> and
> > > generates the actual DMA buffers from on the fly might be better for
> > > security and/or performance reasons.
> >
> > Quite possible. Though I'm not totally convinced of the performace
> > argument since the kernel would then have to build all of the buffers
> from
> > scratch. With real buffers we could just check which register the
> value is
> > for and if there are no problems with that register the value could be
>
> > passed as is.
> >
> > And one major problem with pseudo buffers is that they should not
> impose
> > any nasty limits on what we can do. So the design would have to be
> good
> > from the start.
>
> Well, wouldnt it be easier to deal with state management if the kernel
> is abstracting the entire buffer interface?
>
easier, maby yes. The problem is you going to want to add more state
latter. If we keep state in the kernel it's bound to get ugly with
versioning and upgrading.
It's realy a driver dependant question, acctualy more of a developer
dependant question. It would be a lovely world indeed with multiple
drivers for each card, some ignoring security with(SVGA type) SUID root.
> > > I wonder if we can reasonably get there in a backwards compatible
> way...
> >
> > I think the current DRM interface could be moved on top of the new
> one.
> > Maybe as a separate compatibility module...
>
> Yeah, that could be possible. Old DRI using apps would never know the
> difference...
>
Thats basicalu what has been done for years, I think it's best to ignor
this problem till it's time has come. Develope fist, then wonder how your
going to bring in the old interface.
>
> --
> Patrick "Diablo-D3" McFarland || [EMAIL PROTECTED]
> "Computer games don't affect kids; I mean if Pac-Man affected us as
> kids, we'd
> all be running around in darkened rooms, munching magic pills and
> listening to
> repetitive electronic music." -- Kristian Wilson, Nintendo, Inc, 1989
>
> ATTACHMENT part 2 application/pgp-signature name=signature.asc
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