If we ever want to get 3D accellerated drivers from NVidia, we will  
probably need an AGP/AGPGART API such as the one in the Linux kernel;  
or perhaps linux emul code.  I don't know about ATI's cards.

What about BSD DRI? FreeBSD?

The point is, you probably need to have some interface to AGP to be  
able to read/write configuration values like AGP rates (1x, 2x, 3x).

All of this works in linux already with both nvidia(4) binary/ 
proprietary and nv(4) drivers.

I know all this may seem frivilous, but as a workstation user it's a  
concern of mine I tend to voice.  XFree86's nv(4) runs like trash on my  
Asus P4G8X delux and my Asus TI-4200(128 meg?) card -- no AGP8x  
accelleration, no OpenGL. It's intollerable behavior on the part of  
Video card / motherboard vendors.

-lava