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1/* SPDX-License-Identifier: GPL-2.0 */2#ifndef __LIBPERF_INTERNAL_MMAP_H3#define __LIBPERF_INTERNAL_MMAP_H4 5#include <linux/compiler.h>6#include <linux/refcount.h>7#include <linux/types.h>8#include <stdbool.h>9#include <internal/cpumap.h>10 11/* perf sample has 16 bits size limit */12#define PERF_SAMPLE_MAX_SIZE (1 << 16)13 14struct perf_mmap;15struct perf_counts_values;16 17typedef void (*libperf_unmap_cb_t)(struct perf_mmap *map);18 19/**20 * struct perf_mmap - perf's ring buffer mmap details21 *22 * @refcnt - e.g. code using PERF_EVENT_IOC_SET_OUTPUT to share this23 */24struct perf_mmap {25 void *base;26 int mask;27 int fd;28 struct perf_cpu cpu;29 refcount_t refcnt;30 u64 prev;31 u64 start;32 u64 end;33 bool overwrite;34 u64 flush;35 libperf_unmap_cb_t unmap_cb;36 void *event_copy;37 size_t event_copy_sz;38 struct perf_mmap *next;39};40 41struct perf_mmap_param {42 int prot;43 int mask;44};45 46size_t perf_mmap__mmap_len(struct perf_mmap *map);47 48void perf_mmap__init(struct perf_mmap *map, struct perf_mmap *prev,49 bool overwrite, libperf_unmap_cb_t unmap_cb);50int perf_mmap__mmap(struct perf_mmap *map, struct perf_mmap_param *mp,51 int fd, struct perf_cpu cpu);52void perf_mmap__munmap(struct perf_mmap *map);53void perf_mmap__get(struct perf_mmap *map);54void perf_mmap__put(struct perf_mmap *map);55 56u64 perf_mmap__read_head(struct perf_mmap *map);57 58int perf_mmap__read_self(struct perf_mmap *map, struct perf_counts_values *count);59 60#endif /* __LIBPERF_INTERNAL_MMAP_H */61