DMA_FENCE_FLAG_USER_BITS
I915_FENCE_FLAG_ACTIVE = DMA_FENCE_FLAG_USER_BITS,
DMA_FENCE_WORK_IMM = DMA_FENCE_FLAG_USER_BITS,
#define DRM_SCHED_FENCE_DONT_PIPELINE DMA_FENCE_FLAG_USER_BITS
#define DRM_SCHED_FENCE_FLAG_HAS_DEADLINE_BIT (DMA_FENCE_FLAG_USER_BITS + 1)