1 #ifndef __PERF_MMAP_H
2 #define __PERF_MMAP_H 1
3
4 #include <internal/mmap.h>
5 #include <linux/compiler.h>
6 #include <linux/refcount.h>
7 #include <linux/types.h>
8 #include <linux/ring_buffer.h>
9 #include <stdbool.h>
10 #include <pthread.h> // for cpu_set_t
11 #ifdef HAVE_AIO_SUPPORT
12 #include <aio.h>
13 #endif
14 #include "auxtrace.h"
15 #include "event.h"
16
17 struct aiocb;
18 /**
19 * struct mmap - perf's ring buffer mmap details
20 *
21 * @refcnt - e.g. code using PERF_EVENT_IOC_SET_OUTPUT to share this
22 */
23 struct mmap {
24 struct perf_mmap core;
25 struct auxtrace_mmap auxtrace_mmap;
26 #ifdef HAVE_AIO_SUPPORT
27 struct {
28 void **data;
29 struct aiocb *cblocks;
30 struct aiocb **aiocb;
31 int nr_cblocks;
32 } aio;
33 #endif
34 cpu_set_t affinity_mask;
35 void *data;
36 int comp_level;
37 };
38
39 struct mmap_params {
40 int prot, mask, nr_cblocks, affinity, flush, comp_level;
41 struct auxtrace_mmap_params auxtrace_mp;
42 };
43
44 int perf_mmap__mmap(struct mmap *map, struct mmap_params *mp, int fd, int cpu);
45 void perf_mmap__munmap(struct mmap *map);
46
47 void perf_mmap__get(struct mmap *map);
48 void perf_mmap__put(struct mmap *map);
49
50 void perf_mmap__consume(struct mmap *map);
51
perf_mmap__read_head(struct mmap * mm)52 static inline u64 perf_mmap__read_head(struct mmap *mm)
53 {
54 return ring_buffer_read_head(mm->core.base);
55 }
56
perf_mmap__write_tail(struct mmap * md,u64 tail)57 static inline void perf_mmap__write_tail(struct mmap *md, u64 tail)
58 {
59 ring_buffer_write_tail(md->core.base, tail);
60 }
61
62 union perf_event *perf_mmap__read_forward(struct mmap *map);
63
64 union perf_event *perf_mmap__read_event(struct mmap *map);
65
66 int perf_mmap__push(struct mmap *md, void *to,
67 int push(struct mmap *map, void *to, void *buf, size_t size));
68
69 size_t perf_mmap__mmap_len(struct mmap *map);
70
71 int perf_mmap__read_init(struct mmap *md);
72 void perf_mmap__read_done(struct mmap *map);
73 #endif /*__PERF_MMAP_H */
74