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drm/radeon/kms: add evergreen/cayman CS parser for async DMA (v2)
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Allows us to use the DMA ring from userspace.
DMA doesn't have a good NOP packet in which to embed the
reloc idx, so userspace has to add a reloc for each
buffer used and order them to match the command stream.

v2: fix address bounds checking

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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Alex Deucher committed Dec 14, 2012
1 parent cf4ccd0 commit d2ead3e
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