gpu: nvgpu: Implement compbits padding for mapping

Implement NVGPU_AS_MAP_BUFFER_FLAGS_MAPPABLE_COMPBITS, which adds
extra alignment to compbits allocation for safe compbits mapping.

Bug 200077571

Change-Id: I3a74ebb81412e4e1e69501debeb9ef4e2056ef1a
Signed-off-by: Sami Kiminki <skiminki@nvidia.com>
Reviewed-on: http://git-master/r/730763
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
Tested-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-on: http://git-master/r/740693
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit

1 files changed, 1 insertions, 0 deletions

diff --git a/include/uapi/linux/nvgpu.h b/include/uapi/linux/nvgpu.h
index ab84b699..9527ab82 100644
--- a/include/uapi/linux/nvgpu.h
+++ b/include/uapi/linux/nvgpu.h
@@ -859,6 +859,7 @@ struct nvgpu_as_map_buffer_args {
         __u32 flags;            /* in/out */
 #define NVGPU_AS_MAP_BUFFER_FLAGS_FIXED_OFFSET      (1 << 0)
 #define NVGPU_AS_MAP_BUFFER_FLAGS_CACHEABLE         (1 << 2)
+#define NVGPU_AS_MAP_BUFFER_FLAGS_MAPPABLE_COMPBITS (1 << 6)
         __u32 reserved;         /* in */
         __u32 dmabuf_fd;        /* in */
         __u32 page_size;        /* inout, 0:= best fit to buffer */