new device driver features

So, it sounds like people want a new device driver model upon which 
the X server (or other things) can be layered.  Has anyone outlined 
the feature set for such a driver?

I'll go out on a limb and list what first occurs to me:


Initialization:
	- what does this really involve?

Query card capabilities:
	- amount of VRAM
	- number of screens
	- make/model info
	- more?

Display:
	- query supported display modes (for each screen)
	- set display mode (for each screen)
	- set start address/stride for scanning out the framebuffer
	- set hardware colormap
	- enable/disable each screen
	- stereo mode
	- setup hardware video overlays
	- more?

Monitor:
	- query monitor's parameters/limits (DDC / EDID?)
	- more?

Cursor:
	- show/hide
	- get/set position
	- get/set cursor image
	- more?

Memory:
	- allocate/free VRAM
	- AGP allocation?
	- map VRAM into process address space

Rendering:
	- negotiate DMA based rendering?
	- OpenGL renderer as an intrinsic piece, or separate?
	- simple, built-in rendering (like blits)?
	- more?


SciTech's SNAP interface provides this sort of stuff, plus lots of 
rendering and utility functions.  Is that sort of what people are 
looking for?

-Brian