On Mon, Oct 27, 2003 at 03:14:11PM +0000, Keith Whitwell wrote:

Jeff Garzik wrote:

quoted

Thank you for saying it.  This is what I have been preaching (quietly) 
for years -- command submission and synchronization (and thus, DMA/irq 
handling) needs to be in the kernel.  Everything else can be in 
userspace (excluding hardware enable/enumerate, of course).

To enable secure direct rendering on current hardware (ie without secure 
command submission mechanisms), you need command valididation somewhere.  
This could be a layer on top of the minimal dma engine Linus describes.

Certainly.

quoted

Graphics processors are growing more general, too -- moving towards 
generic vector/data processing engines.  I bet you'll see an optimal 
model emerge where you have some sort of "JIT" for GPU microcode in 
userspace.  

You mean like the programmable fragment and vertex hardware that has been 
in use for a couple of years now?

I mean, taking current fragment and vertex processing and making it
even _more_ general.  Which has already happened, on one particular chip
maker's chip...

	Jeff





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