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mach64_state.c: convert the DRM_MACH64_BLIT ioctl to submit a pointer to
user-space memory rather than a DMA buffer index, similar to DRM_MACH64_VERTEX.
This change allows the DDX to map the DMA buffers read-only and eliminate a
security problem where a client can alter the contents of the DMA buffer after
submission to the DRM.
This change also affects the DRI/DRM interface. Performace-wise, it basically
affects PCI mode where I get a ~12% speedup for some Mesa demos I tested.
This is mainly due to eliminating an ioctl for allocating the DMA buffer.
mach64_dma.c: move the responsibility for allocating memory for the DMA ring
in PCI mode to the DDX.
This change affects the DDX/DRM interface and unifies a couple of PCI/AGP code
paths for ring memory in the DRM.
Bump the mach64 DRM version major and date.
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remove a mach64 warning, align a lot of things from linux kernel
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that particular file. Its contents have changed a good bit since the
original sis code, and the original sis code didn't care much about
attribution since it routinely disclaims Precision Insight/VA Linux
from responsibility. Also, adjust formatting around license headers
(have a comment open immediately before the "Copyright" line, not as a
runon of any previous comments) for automatic processing into FreeBSD,
where /*- is used to signal the beginning of license headers for
automatic compilation of license lists.
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weren't Lindent's because their comments didn't convert very well. A
bunch of other minor clean up with no code implact included.
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