That is expensive. It also requires you create a synchronization point at
PCI level
> try to access the MMIO mmap accel regions. This would confuse most
> cards. How could I prevent this from happening?
Ok if user space has fb mmapped the user is runnign X11 or a graphical
full screen app 99.99999% of the time. So why not simply ignore the problem.
When a user mmaps the fb finish any pending accelerations and stop using
acceleration in the driver until they unmap
Alan
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