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 read;
  22         bpf_counter_evsel_op destroy;
  23         bpf_counter_evsel_install_pe_op install_pe;
  24 };
  25
  26 struct bpf_counter {
  27         void *skel;
  28         struct list_head list;
  29 };
  30
  31 #ifdef HAVE_BPF_SKEL
  32
  33 int bpf_counter__load(struct evsel *evsel, struct target *target);
  34 int bpf_counter__enable(struct evsel *evsel);
  35 int bpf_counter__read(struct evsel *evsel);
  36 void bpf_counter__destroy(struct evsel *evsel);
  37 int bpf_counter__install_pe(struct evsel *evsel, int cpu, int fd);
  38
  39 #else /* HAVE_BPF_SKEL */
  40
  41 #include<linux/err.h>
  42
  43 static inline int bpf_counter__load(struct evsel *evsel __maybe_unused,
  44                                     struct target *target __maybe_unused)
  45 {
  46         return 0;
  47 }
  48
  49 static inline int bpf_counter__enable(struct evsel *evsel __maybe_unused)
  50 {
  51         return 0;
  52 }
  53
  54 static inline int bpf_counter__read(struct evsel *evsel __maybe_unused)
  55 {
  56         return -EAGAIN;
  57 }
  58
  59 static inline void bpf_counter__destroy(struct evsel *evsel __maybe_unused)
  60 {
  61 }
  62
  63 static inline int bpf_counter__install_pe(struct evsel *evsel __maybe_unused,
  64                                           int cpu __maybe_unused,
  65                                           int fd __maybe_unused)
  66 {
  67         return 0;
  68 }
  69
  70 #endif /* HAVE_BPF_SKEL */
  71
  72 #endif /* __PERF_BPF_COUNTER_H */