+/**
+ * See drm_i915_gem_execbuffer_ext_timeline_fences.
+ */
+#define DRM_I915_GEM_EXECBUFFER_EXT_TIMELINE_FENCES 0
+
+/**
+ * This structure describes an array of drm_syncobj and associated points for
+ * timeline variants of drm_syncobj. It is invalid to append this structure to
+ * the execbuf if I915_EXEC_FENCE_ARRAY is set.
+ */
+struct drm_i915_gem_execbuffer_ext_timeline_fences {
+ struct i915_user_extension base;
+
+ /**
+ * Number of element in the handles_ptr & value_ptr arrays.
+ */
+ __u64 fence_count;
+
+ /**
+ * Pointer to an array of struct drm_i915_gem_exec_fence of length
+ * fence_count.
+ */
+ __u64 handles_ptr;
+
+ /**
+ * Pointer to an array of u64 values of length fence_count. Values
+ * must be 0 for a binary drm_syncobj. A Value of 0 for a timeline
+ * drm_syncobj is invalid as it turns a drm_syncobj into a binary one.
+ */
+ __u64 values_ptr;
+};
+