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gpu: nvgpu: Implement compbits padding for mapping

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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
This commit is contained in:
Sami Kiminki
2015-04-10 15:40:46 +03:00
committed by Terje Bergstrom
parent 5a5662fffb
commit 8d6fe0f2ef
3 changed files with 132 additions and 11 deletions
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1
include/uapi/linux/nvgpu.h
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@@ -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 */