1#ifndef __PERF_MMAP_H
 2#define __PERF_MMAP_H 1
 3
 4#include <internal/mmap.h>
 5#include <linux/compiler.h>
 6#include <linux/refcount.h>
 7#include <linux/types.h>
 8#include <linux/ring_buffer.h>
 9#include <stdbool.h>
10#include <pthread.h> // for cpu_set_t
11#ifdef HAVE_AIO_SUPPORT
12#include <aio.h>
13#endif
14#include "auxtrace.h"
15#include "event.h"
16
17struct aiocb;
18
19struct mmap_cpu_mask {
20	unsigned long *bits;
21	size_t nbits;
22};
23
24#define MMAP_CPU_MASK_BYTES(m) \
25	(BITS_TO_LONGS(((struct mmap_cpu_mask *)m)->nbits) * sizeof(unsigned long))
26
27/**
28 * struct mmap - perf's ring buffer mmap details
29 *
30 * @refcnt - e.g. code using PERF_EVENT_IOC_SET_OUTPUT to share this
31 */
32struct mmap {
33	struct perf_mmap	core;
34	struct auxtrace_mmap auxtrace_mmap;
35#ifdef HAVE_AIO_SUPPORT
36	struct {
37		void		 **data;
38		struct aiocb	 *cblocks;
39		struct aiocb	 **aiocb;
40		int		 nr_cblocks;
41	} aio;
42#endif
43	struct mmap_cpu_mask	affinity_mask;
44	void		*data;
45	int		comp_level;
46};
47
48struct mmap_params {
49	struct perf_mmap_param core;
50	int nr_cblocks, affinity, flush, comp_level;
51	struct auxtrace_mmap_params auxtrace_mp;
52};
53
54int mmap__mmap(struct mmap *map, struct mmap_params *mp, int fd, int cpu);
55void mmap__munmap(struct mmap *map);
56
57union perf_event *perf_mmap__read_forward(struct mmap *map);
58
59int perf_mmap__push(struct mmap *md, void *to,
60		    int push(struct mmap *map, void *to, void *buf, size_t size));
61
62size_t mmap__mmap_len(struct mmap *map);
63
64void mmap_cpu_mask__scnprintf(struct mmap_cpu_mask *mask, const char *tag);
65
66#endif /*__PERF_MMAP_H */