On Tuesday 01 February 2005 17:07, Rodolphe Ortalo probably wrote:
> - with respect to command buffers, the biggest performance problem
> nowadays is to move data fast from userspace to kernel space (without
> revolutioning the kernel interface - too much - and without
> compromising the performance opportunities offered by AGP or memory
> remapping);

What is wrong with memory-mapping the DMA buffer?  This would not give 
access to the DMA control registers themselves.

Regards,

Daniel
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