1 /*
2  * SPDX-License-Identifier: MIT
3  *
4  * Copyright © 2019 Intel Corporation
5  */
6 
7 #ifndef _I915_ACTIVE_TYPES_H_
8 #define _I915_ACTIVE_TYPES_H_
9 
10 #include <linux/atomic.h>
11 #include <linux/dma-fence.h>
12 #include <linux/llist.h>
13 #include <linux/mutex.h>
14 #include <linux/rbtree.h>
15 #include <linux/rcupdate.h>
16 #include <linux/workqueue.h>
17 
18 #include "i915_utils.h"
19 
20 struct i915_active_fence {
21 	struct dma_fence __rcu *fence;
22 	struct dma_fence_cb cb;
23 };
24 
25 struct active_node;
26 
27 struct i915_active {
28 	atomic_t count;
29 	struct mutex mutex;
30 
31 	spinlock_t tree_lock;
32 	struct active_node *cache;
33 	struct rb_root tree;
34 
35 	/* Preallocated "exclusive" node */
36 	struct i915_active_fence excl;
37 
38 	unsigned long flags;
39 #define I915_ACTIVE_RETIRE_SLEEPS BIT(0)
40 
41 	int (*active)(struct i915_active *ref);
42 	void (*retire)(struct i915_active *ref);
43 
44 	struct work_struct work;
45 
46 	struct llist_head preallocated_barriers;
47 };
48 
49 #endif /* _I915_ACTIVE_TYPES_H_ */
50