/* SPDX-License-Identifier: GPL-2.0 */ #ifndef __LIBPERF_INTERNAL_MMAP_H #define __LIBPERF_INTERNAL_MMAP_H #include <linux/compiler.h> #include <linux/refcount.h> #include <linux/types.h> #include <stdbool.h> /* perf sample has 16 bits size limit */ #define PERF_SAMPLE_MAX_SIZE (1 << 16) struct perf_mmap; typedef void (*libperf_unmap_cb_t)(struct perf_mmap *map); /** * struct perf_mmap - perf's ring buffer mmap details * * @refcnt - e.g. code using PERF_EVENT_IOC_SET_OUTPUT to share this */ struct perf_mmap { void *base; int mask; int fd; int cpu; refcount_t refcnt; u64 prev; u64 start; u64 end; bool overwrite; u64 flush; libperf_unmap_cb_t unmap_cb; char event_copy[PERF_SAMPLE_MAX_SIZE] __aligned(8); struct perf_mmap *next; }; struct perf_mmap_param { int prot; int mask; }; size_t perf_mmap__mmap_len(struct perf_mmap *map); void perf_mmap__init(struct perf_mmap *map, struct perf_mmap *prev, bool overwrite, libperf_unmap_cb_t unmap_cb); int perf_mmap__mmap(struct perf_mmap *map, struct perf_mmap_param *mp, int fd, int cpu); void perf_mmap__munmap(struct perf_mmap *map); void perf_mmap__get(struct perf_mmap *map); void perf_mmap__put(struct perf_mmap *map); u64 perf_mmap__read_head(struct perf_mmap *map); #endif /* __LIBPERF_INTERNAL_MMAP_H */