18  * Active refs memory management
21  * they idle (when we know the active requests are inactive) and allocate the
36 node_from_active(struct i915_active_fence *active)  in node_from_active()  argument
38 	return container_of(active, struct active_node, base);  in node_from_active()
43 static inline bool is_barrier(const struct i915_active_fence *active)  in is_barrier()  argument
45 	return IS_ERR(rcu_access_pointer(active->fence));  in is_barrier()
79 	return (void *)ref->active ?: (void *)ref->retire ?: (void *)ref;  in active_debug_hint()
205 __active_fence_slot(struct i915_active_fence *active)  in __active_fence_slot()  argument
207 	return (struct dma_fence ** __force)&active->fence;  in __active_fence_slot()
213 	struct i915_active_fence *active =  in active_fence_cb()  local
214 		container_of(cb, typeof(*active), cb);  in active_fence_cb()
216 	return cmpxchg(__active_fence_slot(active), fence, NULL) == fence;  in active_fence_cb()
270 	/* While active, the tree can only be built; not destroyed */  in __active_lookup()
340 			int (*active)(struct i915_active *ref),  in __i915_active_init()
349 	ref->active = active;  in __i915_active_init()
415 replace_barrier(struct i915_active *ref, struct i915_active_fence *active)  in replace_barrier()  argument
417 	if (!is_barrier(active)) /* proto-node used by our idle barrier? */  in replace_barrier()
425 	__active_del_barrier(ref, node_from_active(active));  in replace_barrier()
431 	struct i915_active_fence *active;  in i915_active_ref()  local
439 	active = active_instance(ref, idx);  in i915_active_ref()
440 	if (!active) {  in i915_active_ref()
445 	if (replace_barrier(ref, active)) {  in i915_active_ref()
446 		RCU_INIT_POINTER(active->fence, NULL);  in i915_active_ref()
449 	if (!__i915_active_fence_set(active, fence))  in i915_active_ref()
459 			struct i915_active_fence *active,  in __i915_active_set_fence()  argument
464 	if (replace_barrier(ref, active)) {  in __i915_active_set_fence()
465 		RCU_INIT_POINTER(active->fence, fence);  in __i915_active_set_fence()
470 	prev = __i915_active_fence_set(active, fence);  in __i915_active_set_fence()
499 	/* Only valid while active, see i915_active_acquire_for_context() */  in __i915_active_ref()
531 	if (!ref->active) {  in i915_active_acquire()
541 		err = ref->active(ref);  in i915_active_acquire()
553 	struct i915_active_fence *active;  in i915_active_acquire_for_context()  local
560 	active = active_instance(ref, idx);  in i915_active_acquire_for_context()
561 	if (!active) {  in i915_active_acquire_for_context()
566 	return 0; /* return with active ref */  in i915_active_acquire_for_context()
575 static void enable_signaling(struct i915_active_fence *active)  in enable_signaling()  argument
579 	if (unlikely(is_barrier(active)))  in enable_signaling()
582 	fence = i915_active_fence_get(active);  in enable_signaling()
641 	 * After the wait is complete, the caller may free the active.  in __i915_active_wait()
648 static int __await_active(struct i915_active_fence *active,  in __await_active()  argument
654 	if (is_barrier(active)) /* XXX flush the barrier? */  in __await_active()
657 	fence = i915_active_fence_get(active);  in __await_active()
806 	 * i915_active, due to overlapping active phases there is likely a  in reuse_idle_barrier()
1036  * __i915_active_fence_set: Update the last active fence along its timeline
1037  * @active: the active tracker
1040  * Records the new @fence as the last active fence along its timeline in
1041  * this active tracker, moving the tracking callbacks from the previous
1048 __i915_active_fence_set(struct i915_active_fence *active,  in __i915_active_fence_set()  argument
1054 	if (fence == rcu_access_pointer(active->fence))  in __i915_active_fence_set()
1061 	 * C already resident as the active->fence.  in __i915_active_fence_set()
1080 	prev = xchg(__active_fence_slot(active), fence);  in __i915_active_fence_set()
1084 		__list_del_entry(&active->cb.node);  in __i915_active_fence_set()
1087 	list_add_tail(&active->cb.node, &fence->cb_list);  in __i915_active_fence_set()
1093 int i915_active_fence_set(struct i915_active_fence *active,  in i915_active_fence_set()  argument
1099 	/* Must maintain timeline ordering wrt previous active requests */  in i915_active_fence_set()
1101 	fence = __i915_active_fence_set(active, &rq->fence);  in i915_active_fence_set()