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 
17 struct aiocb;
18 
19 struct 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  */
32 struct 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 
48 struct 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 
54 int mmap__mmap(struct mmap *map, struct mmap_params *mp, int fd, int cpu);
55 void mmap__munmap(struct mmap *map);
56 
57 union perf_event *perf_mmap__read_forward(struct mmap *map);
58 
59 int perf_mmap__push(struct mmap *md, void *to,
60 		    int push(struct mmap *map, void *to, void *buf, size_t size));
61 
62 size_t mmap__mmap_len(struct mmap *map);
63 
64 void mmap_cpu_mask__scnprintf(struct mmap_cpu_mask *mask, const char *tag);
65 
66 #endif /*__PERF_MMAP_H */
67