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gpu: nvgpu: Add support for CDE scatter buffers

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Add support for CDE scatter buffers. When the bus addresses for
surfaces are not contiguous as seen by the GPU (e.g., when SMMU is
bypassed), CDE swizzling needs additional per-page information. This
information is populated in a scatter buffer when required.

Bug 1604102

Change-Id: I3384e2cfb5d5f628ed0f21375bdac8e36b77ae4f
Signed-off-by: Jussi Rasanen <jrasanen@nvidia.com>
Reviewed-on: http://git-master/r/789436
Reviewed-on: http://git-master/r/791243
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
Tested-by: Terje Bergstrom <tbergstrom@nvidia.com>
This commit is contained in:
Jussi Rasanen
2015-08-05 15:59:32 +03:00
committed by Terje Bergstrom
parent 613990cb39
commit bef2159086
5 changed files with 133 additions and 29 deletions
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4
include/uapi/linux/nvgpu.h
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@@ -223,7 +223,9 @@ struct nvgpu_gpu_prepare_compressible_read_args {
__s32 fd;
} fence; /* in/out */
__u32 zbc_color; /* out */
__u32 reserved[5]; /* must be zero */
__u32 reserved; /* must be zero */
__u64 scatterbuffer_offset; /* in, within handle */
__u32 reserved2[2]; /* must be zero */
};
struct nvgpu_gpu_mark_compressible_write_args {