tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
fork
Configure Feed
Select the types of activity you want to include in your feed.
1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef __LIBPERF_INTERNAL_MMAP_H
3#define __LIBPERF_INTERNAL_MMAP_H
4
5#include <linux/compiler.h>
6#include <linux/refcount.h>
7#include <linux/types.h>
8#include <stdbool.h>
9
10/* perf sample has 16 bits size limit */
11#define PERF_SAMPLE_MAX_SIZE (1 << 16)
12
13struct perf_mmap;
14struct perf_counts_values;
15
16typedef void (*libperf_unmap_cb_t)(struct perf_mmap *map);
17
18/**
19 * struct perf_mmap - perf's ring buffer mmap details
20 *
21 * @refcnt - e.g. code using PERF_EVENT_IOC_SET_OUTPUT to share this
22 */
23struct perf_mmap {
24 void *base;
25 int mask;
26 int fd;
27 int cpu;
28 refcount_t refcnt;
29 u64 prev;
30 u64 start;
31 u64 end;
32 bool overwrite;
33 u64 flush;
34 libperf_unmap_cb_t unmap_cb;
35 char event_copy[PERF_SAMPLE_MAX_SIZE] __aligned(8);
36 struct perf_mmap *next;
37};
38
39struct perf_mmap_param {
40 int prot;
41 int mask;
42};
43
44size_t perf_mmap__mmap_len(struct perf_mmap *map);
45
46void perf_mmap__init(struct perf_mmap *map, struct perf_mmap *prev,
47 bool overwrite, libperf_unmap_cb_t unmap_cb);
48int perf_mmap__mmap(struct perf_mmap *map, struct perf_mmap_param *mp,
49 int fd, int cpu);
50void perf_mmap__munmap(struct perf_mmap *map);
51void perf_mmap__get(struct perf_mmap *map);
52void perf_mmap__put(struct perf_mmap *map);
53
54u64 perf_mmap__read_head(struct perf_mmap *map);
55
56int perf_mmap__read_self(struct perf_mmap *map, struct perf_counts_values *count);
57
58#endif /* __LIBPERF_INTERNAL_MMAP_H */