1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __ORDERED_EVENTS_H
3 #define __ORDERED_EVENTS_H
4 
5 #include <linux/types.h>
6 
7 struct perf_sample;
8 
9 struct ordered_event {
10 	u64			timestamp;
11 	u64			file_offset;
12 	union perf_event	*event;
13 	struct list_head	list;
14 };
15 
16 enum oe_flush {
17 	OE_FLUSH__NONE,
18 	OE_FLUSH__FINAL,
19 	OE_FLUSH__ROUND,
20 	OE_FLUSH__HALF,
21 	OE_FLUSH__TOP,
22 	OE_FLUSH__TIME,
23 };
24 
25 struct ordered_events;
26 
27 typedef int (*ordered_events__deliver_t)(struct ordered_events *oe,
28 					 struct ordered_event *event);
29 
30 struct ordered_events_buffer {
31 	struct list_head	list;
32 	struct ordered_event	event[];
33 };
34 
35 struct ordered_events {
36 	u64				 last_flush;
37 	u64				 next_flush;
38 	u64				 max_timestamp;
39 	u64				 max_alloc_size;
40 	u64				 cur_alloc_size;
41 	struct list_head		 events;
42 	struct list_head		 cache;
43 	struct list_head		 to_free;
44 	struct ordered_events_buffer	*buffer;
45 	struct ordered_event		*last;
46 	ordered_events__deliver_t	 deliver;
47 	int				 buffer_idx;
48 	unsigned int			 nr_events;
49 	enum oe_flush			 last_flush_type;
50 	u32				 nr_unordered_events;
51 	bool				 copy_on_queue;
52 	void				*data;
53 };
54 
55 int ordered_events__queue(struct ordered_events *oe, union perf_event *event,
56 			  u64 timestamp, u64 file_offset);
57 void ordered_events__delete(struct ordered_events *oe, struct ordered_event *event);
58 int ordered_events__flush(struct ordered_events *oe, enum oe_flush how);
59 int ordered_events__flush_time(struct ordered_events *oe, u64 timestamp);
60 void ordered_events__init(struct ordered_events *oe, ordered_events__deliver_t deliver,
61 			  void *data);
62 void ordered_events__free(struct ordered_events *oe);
63 void ordered_events__reinit(struct ordered_events *oe);
64 u64 ordered_events__first_time(struct ordered_events *oe);
65 
66 static inline
ordered_events__set_alloc_size(struct ordered_events * oe,u64 size)67 void ordered_events__set_alloc_size(struct ordered_events *oe, u64 size)
68 {
69 	oe->max_alloc_size = size;
70 }
71 
72 static inline
ordered_events__set_copy_on_queue(struct ordered_events * oe,bool copy)73 void ordered_events__set_copy_on_queue(struct ordered_events *oe, bool copy)
74 {
75 	oe->copy_on_queue = copy;
76 }
77 #endif /* __ORDERED_EVENTS_H */
78