timerlat_bpf.h

 1/* SPDX-License-Identifier: GPL-2.0 */
 2#pragma once
 3
 4enum summary_field {
 5	SUMMARY_CURRENT,
 6	SUMMARY_MIN,
 7	SUMMARY_MAX,
 8	SUMMARY_COUNT,
 9	SUMMARY_SUM,
10	SUMMARY_OVERFLOW,
11	SUMMARY_FIELD_N
12};
13
14#ifndef __bpf__
15#ifdef HAVE_BPF_SKEL
16int timerlat_bpf_init(struct timerlat_params *params);
17int timerlat_bpf_attach(void);
18void timerlat_bpf_detach(void);
19void timerlat_bpf_destroy(void);
20int timerlat_bpf_wait(int timeout);
21int timerlat_bpf_restart_tracing(void);
22int timerlat_bpf_get_hist_value(int key,
23				long long *value_irq,
24				long long *value_thread,
25				long long *value_user,
26				int cpus);
27int timerlat_bpf_get_summary_value(enum summary_field key,
28				   long long *value_irq,
29				   long long *value_thread,
30				   long long *value_user,
31				   int cpus);
32
33static inline int have_libbpf_support(void) { return 1; }
34#else
35static inline int timerlat_bpf_init(struct timerlat_params *params)
36{
37	return -1;
38}
39static inline int timerlat_bpf_attach(void) { return -1; }
40static inline void timerlat_bpf_detach(void) { };
41static inline void timerlat_bpf_destroy(void) { };
42static inline int timerlat_bpf_wait(int timeout) { return -1; }
43static inline int timerlat_bpf_restart_tracing(void) { return -1; };
44static inline int timerlat_bpf_get_hist_value(int key,
45					      long long *value_irq,
46					      long long *value_thread,
47					      long long *value_user,
48					      int cpus)
49{
50	return -1;
51}
52static inline int timerlat_bpf_get_summary_value(enum summary_field key,
53						 long long *value_irq,
54						 long long *value_thread,
55						 long long *value_user,
56						 int cpus)
57{
58	return -1;
59}
60static inline int have_libbpf_support(void) { return 0; }
61#endif /* HAVE_BPF_SKEL */
62#endif /* __bpf__ */