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| 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 | #include <internal/cpumap.h> |
| 10 | |
| 11 | /* perf sample has 16 bits size limit */ |
| 12 | #define PERF_SAMPLE_MAX_SIZE (1 << 16) |
| 13 | |
| 14 | struct perf_mmap; |
| 15 | struct perf_counts_values; |
| 16 | |
| 17 | typedef void (*libperf_unmap_cb_t)(struct perf_mmap *map); |
| 18 | |
| 19 | /** |
| 20 | * struct perf_mmap - perf's ring buffer mmap details |
| 21 | * |
| 22 | * @refcnt - e.g. code using PERF_EVENT_IOC_SET_OUTPUT to share this |
| 23 | */ |
| 24 | struct 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 | |
| 41 | struct perf_mmap_param { |
| 42 | int prot; |
| 43 | int mask; |
| 44 | }; |
| 45 | |
| 46 | size_t perf_mmap__mmap_len(struct perf_mmap *map); |
| 47 | |
| 48 | void perf_mmap__init(struct perf_mmap *map, struct perf_mmap *prev, |
| 49 | bool overwrite, libperf_unmap_cb_t unmap_cb); |
| 50 | int perf_mmap__mmap(struct perf_mmap *map, struct perf_mmap_param *mp, |
| 51 | int fd, struct perf_cpu cpu); |
| 52 | void perf_mmap__munmap(struct perf_mmap *map); |
| 53 | void perf_mmap__get(struct perf_mmap *map); |
| 54 | void perf_mmap__put(struct perf_mmap *map); |
| 55 | |
| 56 | u64 perf_mmap__read_head(struct perf_mmap *map); |
| 57 | |
| 58 | int perf_mmap__read_self(struct perf_mmap *map, struct perf_counts_values *count); |
| 59 | |
| 60 | #endif /* __LIBPERF_INTERNAL_MMAP_H */ |
| 61 |
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