tools/perf/util/bpf_counter.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef __PERF_BPF_COUNTER_H
   3 #define __PERF_BPF_COUNTER_H 1
   4
   5 #include <linux/list.h>
   6
   7 struct evsel;
   8 struct target;
   9 struct bpf_counter;
  10
  11 typedef int (*bpf_counter_evsel_op)(struct evsel *evsel);
  12 typedef int (*bpf_counter_evsel_target_op)(struct evsel *evsel,
  13                                            struct target *target);
  14 typedef int (*bpf_counter_evsel_install_pe_op)(struct evsel *evsel,
  15                                                int cpu,
  16                                                int fd);
  17
  18 struct bpf_counter_ops {
  19         bpf_counter_evsel_target_op load;
  20         bpf_counter_evsel_op enable;
  21         bpf_counter_evsel_op disable;
  22         bpf_counter_evsel_op read;
  23         bpf_counter_evsel_op destroy;
  24         bpf_counter_evsel_install_pe_op install_pe;
  25 };
  26
  27 struct bpf_counter {
  28         void *skel;
  29         struct list_head list;
  30 };
  31
  32 #ifdef HAVE_BPF_SKEL
  33
  34 int bpf_counter__load(struct evsel *evsel, struct target *target);
  35 int bpf_counter__enable(struct evsel *evsel);
  36 int bpf_counter__disable(struct evsel *evsel);
  37 int bpf_counter__read(struct evsel *evsel);
  38 void bpf_counter__destroy(struct evsel *evsel);
  39 int bpf_counter__install_pe(struct evsel *evsel, int cpu, int fd);
  40
  41 #else /* HAVE_BPF_SKEL */
  42
  43 #include <linux/err.h>
  44
  45 static inline int bpf_counter__load(struct evsel *evsel __maybe_unused,
  46                                     struct target *target __maybe_unused)
  47 {
  48         return 0;
  49 }
  50
  51 static inline int bpf_counter__enable(struct evsel *evsel __maybe_unused)
  52 {
  53         return 0;
  54 }
  55
  56 static inline int bpf_counter__disable(struct evsel *evsel __maybe_unused)
  57 {
  58         return 0;
  59 }
  60
  61 static inline int bpf_counter__read(struct evsel *evsel __maybe_unused)
  62 {
  63         return -EAGAIN;
  64 }
  65
  66 static inline void bpf_counter__destroy(struct evsel *evsel __maybe_unused)
  67 {
  68 }
  69
  70 static inline int bpf_counter__install_pe(struct evsel *evsel __maybe_unused,
  71                                           int cpu __maybe_unused,
  72                                           int fd __maybe_unused)
  73 {
  74         return 0;
  75 }
  76
  77 #endif /* HAVE_BPF_SKEL */
  78
  79 #endif /* __PERF_BPF_COUNTER_H */