amdgpu_virt_request_full_gpu
r = amdgpu_virt_request_full_gpu(adev, true);
amdgpu_virt_request_full_gpu(adev, false);
r = amdgpu_virt_request_full_gpu(adev, true);
amdgpu_virt_request_full_gpu(adev, false);
int amdgpu_virt_request_full_gpu(struct amdgpu_device *adev, bool init);