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- /* 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>
- #include <internal/cpumap.h>
- /* perf sample has 16 bits size limit */
- #define PERF_SAMPLE_MAX_SIZE (1 << 16)
- struct perf_mmap;
- struct perf_counts_values;
- 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;
- struct perf_cpu 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, struct perf_cpu 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);
- int perf_mmap__read_self(struct perf_mmap *map, struct perf_counts_values *count);
- #endif /* __LIBPERF_INTERNAL_MMAP_H */
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