30 	u64 timeline;  member
156 		/* Make the cached node available for reuse with any timeline */  in __active_retire()
157 		ref->cache->timeline = 0; /* needs cmpxchg(u64) */  in __active_retire()
169 	/* Finally free the discarded timeline tree  */  in __active_retire()
236 	GEM_BUG_ON(idx == 0); /* 0 is the unordered timeline, rsvd for cache */  in __active_lookup()
239 	 * We track the most recently used timeline to skip a rbtree search  in __active_lookup()
243 	 * current timeline.  in __active_lookup()
247 		u64 cached = READ_ONCE(it->timeline);  in __active_lookup()
254 		 * An unclaimed cache [.timeline=0] can only be claimed once.  in __active_lookup()
258 		 * idx. If, and only if, the timeline is currently zero is it  in __active_lookup()
263 		if (!cached && !cmpxchg64(&it->timeline, 0, idx))  in __active_lookup()
274 		if (it->timeline < idx) {  in __active_lookup()
276 		} else if (it->timeline > idx) {  in __active_lookup()
307 		if (node->timeline == idx)  in active_instance()
310 		if (node->timeline < idx)  in active_instance()
326 	node->timeline = idx;  in active_instance()
373 	GEM_BUG_ON(node->timeline != engine->kernel_context->timeline->fence_context);  in ____active_del_barrier()
377 	 * outside of the kernel_context timeline mutex and so someone  in ____active_del_barrier()
420 	 * This request is on the kernel_context timeline, and so  in replace_barrier()
485 	/* We expect the caller to manage the exclusive timeline ordering */  in i915_active_set_exclusive()
771 	return node->timeline == idx && !i915_active_fence_isset(&node->base);  in is_idle_barrier()
805 		if (node->timeline < idx)  in reuse_idle_barrier()
814 	 * any idle-barriers on this timeline that we missed, or just use  in reuse_idle_barrier()
822 		if (node->timeline > idx)  in reuse_idle_barrier()
825 		if (node->timeline < idx)  in reuse_idle_barrier()
833 		 * kernel_context timeline, which notably we do not hold  in reuse_idle_barrier()
878 		u64 idx = engine->kernel_context->timeline->fence_context;  in i915_active_acquire_preallocate_barrier()
892 			node->timeline = idx;  in i915_active_acquire_preallocate_barrier()
967 			if (it->timeline < node->timeline)  in i915_active_acquire_barrier()
995 	GEM_BUG_ON(i915_request_timeline(rq) != engine->kernel_context->timeline);  in i915_request_add_active_barriers()
1015  * __i915_active_fence_set: Update the last active fence along its timeline
1019  * Records the new @fence as the last active fence along its timeline in
1024  * fences within the timeline of the i915_active_fence is understood, it
1063 	 * Note the strong ordering of the timeline also provides consistent  in __i915_active_fence_set()
1098 	 * and we know that we are first on the timeline.  If it is still  in __i915_active_fence_set()
1124 	/* Must maintain timeline ordering wrt previous active requests */  in i915_active_fence_set()