1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3  * lib_sw_fence.h - library routines for testing N:M synchronisation points
4  *
5  * Copyright (C) 2017 Intel Corporation
6  */
7 
8 #ifndef _LIB_SW_FENCE_H_
9 #define _LIB_SW_FENCE_H_
10 
11 #include <linux/timer.h>
12 
13 #include "../i915_sw_fence.h"
14 
15 #ifdef CONFIG_LOCKDEP
16 #define onstack_fence_init(fence)				\
17 do {								\
18 	static struct lock_class_key __key;			\
19 								\
20 	__onstack_fence_init((fence), #fence, &__key);	\
21 } while (0)
22 #else
23 #define onstack_fence_init(fence)				\
24 	__onstack_fence_init((fence), NULL, NULL)
25 #endif
26 
27 void __onstack_fence_init(struct i915_sw_fence *fence,
28 			  const char *name,
29 			  struct lock_class_key *key);
30 void onstack_fence_fini(struct i915_sw_fence *fence);
31 
32 struct timed_fence {
33 	struct i915_sw_fence fence;
34 	struct timer_list timer;
35 };
36 
37 void timed_fence_init(struct timed_fence *tf, unsigned long expires);
38 void timed_fence_fini(struct timed_fence *tf);
39 
40 struct i915_sw_fence *heap_fence_create(gfp_t gfp);
41 void heap_fence_put(struct i915_sw_fence *fence);
42 
43 #endif /* _LIB_SW_FENCE_H_ */
44