1#ifndef __PERF_MMAP_H
2#define __PERF_MMAP_H 1
3
4#include <internal/mmap.h>
5#include <linux/types.h>
6#include <linux/bitops.h>
7#include <perf/cpumap.h>
8#ifdef HAVE_AIO_SUPPORT
9#include <aio.h>
10#endif
11#include "auxtrace.h"
12#include "util/compress.h"
13
14struct aiocb;
15
16struct mmap_cpu_mask {
17 unsigned long *bits;
18 size_t nbits;
19};
20
21#define MMAP_CPU_MASK_BYTES(m) \
22 (BITS_TO_LONGS(((struct mmap_cpu_mask *)m)->nbits) * sizeof(unsigned long))
23
24/**
25 * struct mmap - perf's ring buffer mmap details
26 *
27 * @refcnt - e.g. code using PERF_EVENT_IOC_SET_OUTPUT to share this
28 */
29struct mmap {
30 struct perf_mmap core;
31 struct auxtrace_mmap auxtrace_mmap;
32#ifdef HAVE_AIO_SUPPORT
33 struct {
34 void **data;
35 struct aiocb *cblocks;
36 struct aiocb **aiocb;
37 int nr_cblocks;
38 } aio;
39#endif
40 struct mmap_cpu_mask affinity_mask;
41 void *data;
42 struct perf_data_file *file;
43 struct zstd_data zstd_data;
44};
45
46struct mmap_params {
47 struct perf_mmap_param core;
48 int nr_cblocks, affinity, flush, comp_level;
49 struct auxtrace_mmap_params auxtrace_mp;
50};
51
52int mmap__mmap(struct mmap *map, struct mmap_params *mp, int fd, struct perf_cpu cpu);
53void mmap__munmap(struct mmap *map);
54
55union perf_event *perf_mmap__read_forward(struct mmap *map);
56
57int perf_mmap__push(struct mmap *md, void *to,
58 int push(struct mmap *map, void *to, void *buf, size_t size));
59
60size_t mmap__mmap_len(struct mmap *map);
61
62void mmap_cpu_mask__scnprintf(struct mmap_cpu_mask *mask, const char *tag);
63
64#endif /*__PERF_MMAP_H */
65

source code of linux/tools/perf/util/mmap.h