1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef __ORDERED_EVENTS_H
3#define __ORDERED_EVENTS_H
4
5#include <linux/types.h>
6
7struct perf_sample;
8
9struct ordered_event {
10	u64			timestamp;
11	u64			file_offset;
12	union perf_event	*event;
13	struct list_head	list;
14};
15
16enum 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
25struct ordered_events;
26
27typedef int (*ordered_events__deliver_t)(struct ordered_events *oe,
28					 struct ordered_event *event);
29
30struct ordered_events_buffer {
31	struct list_head	list;
32	struct ordered_event	event[];
33};
34
35struct 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
55int ordered_events__queue(struct ordered_events *oe, union perf_event *event,
56			  u64 timestamp, u64 file_offset);
57void ordered_events__delete(struct ordered_events *oe, struct ordered_event *event);
58int ordered_events__flush(struct ordered_events *oe, enum oe_flush how);
59int ordered_events__flush_time(struct ordered_events *oe, u64 timestamp);
60void ordered_events__init(struct ordered_events *oe, ordered_events__deliver_t deliver,
61			  void *data);
62void ordered_events__free(struct ordered_events *oe);
63void ordered_events__reinit(struct ordered_events *oe);
64u64 ordered_events__first_time(struct ordered_events *oe);
65
66static inline
67void ordered_events__set_alloc_size(struct ordered_events *oe, u64 size)
68{
69	oe->max_alloc_size = size;
70}
71
72static inline
73void 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