From d0e092d969a20a9848d5721cbf3fb8e957f66635 Mon Sep 17 00:00:00 2001
From: Alex Deucher <alexander.deucher@amd.com>
Date: Fri, 31 Aug 2012 11:00:53 -0400
Subject: [PATCH] drm/radeon/cik: add support for doing async VM pt updates
 (v5)

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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