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drm/radeon/cik: add support for doing async VM pt updates (v5)
authorAlex Deucher <alexander.deucher@amd.com>
Fri, 31 Aug 2012 15:00:53 +0000 (11:00 -0400)
committerAlex Deucher <alexander.deucher@amd.com>
Tue, 25 Jun 2013 21:50:34 +0000 (17:50 -0400)
Async page table updates using the sDMA engine.  sDMA has a
special packet for updating entries for contiguous pages
that reduces overhead.

v2: add support for and use the CP for now.
v3: update for 2 level PTs
v4: rebase, fix DMA packet
v5: switch to using an IB

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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