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authorAlex Waterman <alexw@nvidia.com>2017-04-10 16:27:47 -0400
committermobile promotions <svcmobile_promotions@nvidia.com>2017-04-25 17:25:54 -0400
commit6a14d980cfdce5609c0eb7b20e2da3d98fbbccb8 (patch)
treeca04bbb2a27f28958bd7f884fef0327063b9152e /include/uapi
parent39524b094180ab747287bc893e217dcbe5029e64 (diff)
gpu: nvgpu: Add sub-nvgpu_mem
Add an API for creating a special sub-nvgpu_mem struct. This struct comes with some fairly important caveats but is very useful for the semaphore code. Also, make sure that in nvgpu_mem_begin() and nvgpu_mem_end() no additional mappings are made if not necessary. More importantly during nvgpu_mem_end() it would be possible to vunmap() a CPU mapping of a DMA allocation that does not expect this to happen. JIRA NVGPU-12 JIRA NVGPU-30 Change-Id: I579429da9ff7288488753a113bafc558e0f17a0f Signed-off-by: Alex Waterman <alexw@nvidia.com> Reviewed-on: http://git-master/r/1464077 Reviewed-by: Automatic_Commit_Validation_User GVS: Gerrit_Virtual_Submit Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com> Reviewed-by: svccoveritychecker <svccoveritychecker@nvidia.com>
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