video: tegra: nvmap: disallow cpu access to carveout if specified

Disable cpu accesses on all allocations from carveouts which
specify that they can't be accessed from cpu. Disable both kernel
and user space accesses.

Also, do not allow any cache related operations to execute on
such carveouts as it is not required.

JIRA TMM-40

Change-Id: I437e41b1bc66947915cf31e431438f27b8dec233
Signed-off-by: Sri Krishna chowdary <schowdary@nvidia.com>
Reviewed-on: http://git-master/r/1118452
Reviewed-by: Sachin Nikam <snikam@nvidia.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/linux/nvmap.h b/include/linux/nvmap.h
index d551f992d..764e03fe3 100644
--- a/include/linux/nvmap.h
+++ b/include/linux/nvmap.h
@@ -87,6 +87,7 @@ struct nvmap_platform_carveout {
         int can_alloc;
         bool enable_static_dma_map;
         bool disable_dynamic_dma_map;
+        bool no_cpu_access; /* carveout can't be accessed from cpu at all */
         bool init_done; /* FIXME: remove once all caveouts use reserved-memory */
 };