/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __PERF_EVSEL_H
#define __PERF_EVSEL_H 1

#include <linux/list.h>
#include <stdbool.h>
#include <sys/types.h>
#include <linux/perf_event.h>
#include <linux/types.h>
#include <internal/evsel.h>
#include <perf/evsel.h>
#include "symbol_conf.h"
#include <internal/cpumap.h>

struct bpf_object;
struct cgroup;
struct perf_counts;
struct perf_stat_evsel;
union perf_event;
struct bpf_counter_ops;
struct target;
struct hashmap;
struct bperf_leader_bpf;
struct bperf_follower_bpf;

typedef int (evsel__sb_cb_t)(union perf_event *event, void *data);

enum perf_tool_event {
        PERF_TOOL_NONE          = 0,
        PERF_TOOL_DURATION_TIME = 1,
};

/** struct evsel - event selector
 *
 * @evlist - evlist this evsel is in, if it is in one.
 * @core - libperf evsel object
 * @name - Can be set to retain the original event name passed by the user,
 *         so that when showing results in tools such as 'perf stat', we
 *         show the name used, not some alias.
 * @id_pos: the position of the event id (PERF_SAMPLE_ID or
 *          PERF_SAMPLE_IDENTIFIER) in a sample event i.e. in the array of
 *          struct perf_record_sample
 * @is_pos: the position (counting backwards) of the event id (PERF_SAMPLE_ID or
 *          PERF_SAMPLE_IDENTIFIER) in a non-sample event i.e. if sample_id_all
 *          is used there is an id sample appended to non-sample events
 * @priv:   And what is in its containing unnamed union are tool specific
 */
struct evsel {
        struct perf_evsel       core;
        struct evlist           *evlist;
        off_t                   id_offset;
        int                     id_pos;
        int                     is_pos;
        unsigned int            sample_size;

        /*
         * These fields can be set in the parse-events code or similar.
         * Please check evsel__clone() to copy them properly so that
         * they can be released properly.
         */
        struct {
                char                    *name;
                char                    *group_name;
                const char              *pmu_name;
                struct tep_event        *tp_format;
                char                    *filter;
                unsigned long           max_events;
                double                  scale;
                const char              *unit;
                struct cgroup           *cgrp;
                enum perf_tool_event    tool_event;
                /* parse modifier helper */
                int                     exclude_GH;
                int                     sample_read;
                bool                    snapshot;
                bool                    per_pkg;
                bool                    percore;
                bool                    precise_max;
                bool                    use_uncore_alias;
                bool                    is_libpfm_event;
                bool                    auto_merge_stats;
                bool                    collect_stat;
                bool                    weak_group;
                bool                    bpf_counter;
                bool                    use_config_name;
                int                     bpf_fd;
                struct bpf_object       *bpf_obj;
                struct list_head        config_terms;
        };

        /*
         * metric fields are similar, but needs more care as they can have
         * references to other metric (evsel).
         */
        const char *            metric_expr;
        const char *            metric_name;
        struct evsel            **metric_events;
        struct evsel            *metric_leader;

        void                    *handler;
        struct perf_counts      *counts;
        struct perf_counts      *prev_raw_counts;
        unsigned long           nr_events_printed;
        struct perf_stat_evsel  *stats;
        void                    *priv;
        u64                     db_id;
        bool                    uniquified_name;
        bool                    supported;
        bool                    needs_swap;
        bool                    disabled;
        bool                    no_aux_samples;
        bool                    immediate;
        bool                    tracking;
        bool                    ignore_missing_thread;
        bool                    forced_leader;
        bool                    cmdline_group_boundary;
        bool                    merged_stat;
        bool                    reset_group;
        bool                    errored;
        struct hashmap          *per_pkg_mask;
        int                     err;
        int                     cpu_iter;
        struct {
                evsel__sb_cb_t  *cb;
                void            *data;
        } side_band;
        /*
         * For reporting purposes, an evsel sample can have a callchain
         * synthesized from AUX area data. Keep track of synthesized sample
         * types here. Note, the recorded sample_type cannot be changed because
         * it is needed to continue to parse events.
         * See also evsel__has_callchain().
         */
        __u64                   synth_sample_type;

        /*
         * bpf_counter_ops serves two use cases:
         *   1. perf-stat -b          counting events used byBPF programs
         *   2. perf-stat --use-bpf   use BPF programs to aggregate counts
         */
        struct bpf_counter_ops  *bpf_counter_ops;

        /* for perf-stat -b */
        struct list_head        bpf_counter_list;

        /* for perf-stat --use-bpf */
        int                     bperf_leader_prog_fd;
        int                     bperf_leader_link_fd;
        union {
                struct bperf_leader_bpf *leader_skel;
                struct bperf_follower_bpf *follower_skel;
        };
        unsigned long           open_flags;
        int                     precise_ip_original;
};

struct perf_missing_features {
        bool sample_id_all;
        bool exclude_guest;
        bool mmap2;
        bool cloexec;
        bool clockid;
        bool clockid_wrong;
        bool lbr_flags;
        bool write_backward;
        bool group_read;
        bool ksymbol;
        bool bpf;
        bool aux_output;
        bool branch_hw_idx;
        bool cgroup;
        bool data_page_size;
        bool code_page_size;
        bool weight_struct;
};

extern struct perf_missing_features perf_missing_features;

struct perf_cpu_map;
struct thread_map;
struct record_opts;

static inline struct perf_cpu_map *evsel__cpus(struct evsel *evsel)
{
        return perf_evsel__cpus(&evsel->core);
}

static inline int evsel__nr_cpus(struct evsel *evsel)
{
        return evsel__cpus(evsel)->nr;
}

void perf_counts_values__scale(struct perf_counts_values *count,
                               bool scale, s8 *pscaled);

void evsel__compute_deltas(struct evsel *evsel, int cpu, int thread,
                           struct perf_counts_values *count);

int evsel__object_config(size_t object_size,
                         int (*init)(struct evsel *evsel),
                         void (*fini)(struct evsel *evsel));

struct perf_pmu *evsel__find_pmu(struct evsel *evsel);
bool evsel__is_aux_event(struct evsel *evsel);

struct evsel *evsel__new_idx(struct perf_event_attr *attr, int idx);

static inline struct evsel *evsel__new(struct perf_event_attr *attr)
{
        return evsel__new_idx(attr, 0);
}

struct evsel *evsel__clone(struct evsel *orig);
struct evsel *evsel__newtp_idx(const char *sys, const char *name, int idx);

int copy_config_terms(struct list_head *dst, struct list_head *src);
void free_config_terms(struct list_head *config_terms);

/*
 * Returns pointer with encoded error via <linux/err.h> interface.
 */
static inline struct evsel *evsel__newtp(const char *sys, const char *name)
{
        return evsel__newtp_idx(sys, name, 0);
}

struct evsel *evsel__new_cycles(bool precise, __u32 type, __u64 config);

struct tep_event *event_format__new(const char *sys, const char *name);

void evsel__init(struct evsel *evsel, struct perf_event_attr *attr, int idx);
void evsel__exit(struct evsel *evsel);
void evsel__delete(struct evsel *evsel);

struct callchain_param;

void evsel__config(struct evsel *evsel, struct record_opts *opts,
                   struct callchain_param *callchain);
void evsel__config_callchain(struct evsel *evsel, struct record_opts *opts,
                             struct callchain_param *callchain);

int __evsel__sample_size(u64 sample_type);
void evsel__calc_id_pos(struct evsel *evsel);

bool evsel__is_cache_op_valid(u8 type, u8 op);

static inline bool evsel__is_bpf(struct evsel *evsel)
{
        return evsel->bpf_counter_ops != NULL;
}

#define EVSEL__MAX_ALIASES 8

extern const char *evsel__hw_cache[PERF_COUNT_HW_CACHE_MAX][EVSEL__MAX_ALIASES];
extern const char *evsel__hw_cache_op[PERF_COUNT_HW_CACHE_OP_MAX][EVSEL__MAX_ALIASES];
extern const char *evsel__hw_cache_result[PERF_COUNT_HW_CACHE_RESULT_MAX][EVSEL__MAX_ALIASES];
extern const char *evsel__hw_names[PERF_COUNT_HW_MAX];
extern const char *evsel__sw_names[PERF_COUNT_SW_MAX];
extern char *evsel__bpf_counter_events;
bool evsel__match_bpf_counter_events(const char *name);

int __evsel__hw_cache_type_op_res_name(u8 type, u8 op, u8 result, char *bf, size_t size);
const char *evsel__name(struct evsel *evsel);

const char *evsel__group_name(struct evsel *evsel);
int evsel__group_desc(struct evsel *evsel, char *buf, size_t size);

void __evsel__set_sample_bit(struct evsel *evsel, enum perf_event_sample_format bit);
void __evsel__reset_sample_bit(struct evsel *evsel, enum perf_event_sample_format bit);

#define evsel__set_sample_bit(evsel, bit) \
        __evsel__set_sample_bit(evsel, PERF_SAMPLE_##bit)

#define evsel__reset_sample_bit(evsel, bit) \
        __evsel__reset_sample_bit(evsel, PERF_SAMPLE_##bit)

void evsel__set_sample_id(struct evsel *evsel, bool use_sample_identifier);

void arch_evsel__set_sample_weight(struct evsel *evsel);

int evsel__set_filter(struct evsel *evsel, const char *filter);
int evsel__append_tp_filter(struct evsel *evsel, const char *filter);
int evsel__append_addr_filter(struct evsel *evsel, const char *filter);
int evsel__enable_cpu(struct evsel *evsel, int cpu);
int evsel__enable(struct evsel *evsel);
int evsel__disable(struct evsel *evsel);
int evsel__disable_cpu(struct evsel *evsel, int cpu);

int evsel__open_per_cpu(struct evsel *evsel, struct perf_cpu_map *cpus, int cpu);
int evsel__open_per_thread(struct evsel *evsel, struct perf_thread_map *threads);
int evsel__open(struct evsel *evsel, struct perf_cpu_map *cpus,
                struct perf_thread_map *threads);
void evsel__close(struct evsel *evsel);
int evsel__prepare_open(struct evsel *evsel, struct perf_cpu_map *cpus,
                struct perf_thread_map *threads);
bool evsel__detect_missing_features(struct evsel *evsel);

enum rlimit_action { NO_CHANGE, SET_TO_MAX, INCREASED_MAX };
bool evsel__increase_rlimit(enum rlimit_action *set_rlimit);

bool evsel__ignore_missing_thread(struct evsel *evsel,
                                  int nr_cpus, int cpu,
                                  struct perf_thread_map *threads,
                                  int thread, int err);
bool evsel__precise_ip_fallback(struct evsel *evsel);

struct perf_sample;

void *evsel__rawptr(struct evsel *evsel, struct perf_sample *sample, const char *name);
u64 evsel__intval(struct evsel *evsel, struct perf_sample *sample, const char *name);

static inline char *evsel__strval(struct evsel *evsel, struct perf_sample *sample, const char *name)
{
        return evsel__rawptr(evsel, sample, name);
}

struct tep_format_field;

u64 format_field__intval(struct tep_format_field *field, struct perf_sample *sample, bool needs_swap);

struct tep_format_field *evsel__field(struct evsel *evsel, const char *name);

#define evsel__match(evsel, t, c)               \
        (evsel->core.attr.type == PERF_TYPE_##t &&      \
         evsel->core.attr.config == PERF_COUNT_##c)

static inline bool evsel__match2(struct evsel *e1, struct evsel *e2)
{
        return (e1->core.attr.type == e2->core.attr.type) &&
               (e1->core.attr.config == e2->core.attr.config);
}

int evsel__read_counter(struct evsel *evsel, int cpu, int thread);

int __evsel__read_on_cpu(struct evsel *evsel, int cpu, int thread, bool scale);

/**
 * evsel__read_on_cpu - Read out the results on a CPU and thread
 *
 * @evsel - event selector to read value
 * @cpu - CPU of interest
 * @thread - thread of interest
 */
static inline int evsel__read_on_cpu(struct evsel *evsel, int cpu, int thread)
{
        return __evsel__read_on_cpu(evsel, cpu, thread, false);
}

/**
 * evsel__read_on_cpu_scaled - Read out the results on a CPU and thread, scaled
 *
 * @evsel - event selector to read value
 * @cpu - CPU of interest
 * @thread - thread of interest
 */
static inline int evsel__read_on_cpu_scaled(struct evsel *evsel, int cpu, int thread)
{
        return __evsel__read_on_cpu(evsel, cpu, thread, true);
}

int evsel__parse_sample(struct evsel *evsel, union perf_event *event,
                        struct perf_sample *sample);

int evsel__parse_sample_timestamp(struct evsel *evsel, union perf_event *event,
                                  u64 *timestamp);

static inline struct evsel *evsel__next(struct evsel *evsel)
{
        return list_entry(evsel->core.node.next, struct evsel, core.node);
}

static inline struct evsel *evsel__prev(struct evsel *evsel)
{
        return list_entry(evsel->core.node.prev, struct evsel, core.node);
}

/**
 * evsel__is_group_leader - Return whether given evsel is a leader event
 *
 * @evsel - evsel selector to be tested
 *
 * Return %true if @evsel is a group leader or a stand-alone event
 */
static inline bool evsel__is_group_leader(const struct evsel *evsel)
{
        return evsel->core.leader == &evsel->core;
}

/**
 * evsel__is_group_event - Return whether given evsel is a group event
 *
 * @evsel - evsel selector to be tested
 *
 * Return %true iff event group view is enabled and @evsel is a actual group
 * leader which has other members in the group
 */
static inline bool evsel__is_group_event(struct evsel *evsel)
{
        if (!symbol_conf.event_group)
                return false;

        return evsel__is_group_leader(evsel) && evsel->core.nr_members > 1;
}

bool evsel__is_function_event(struct evsel *evsel);

static inline bool evsel__is_bpf_output(struct evsel *evsel)
{
        return evsel__match(evsel, SOFTWARE, SW_BPF_OUTPUT);
}

static inline bool evsel__is_clock(struct evsel *evsel)
{
        return evsel__match(evsel, SOFTWARE, SW_CPU_CLOCK) ||
               evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK);
}

bool evsel__fallback(struct evsel *evsel, int err, char *msg, size_t msgsize);
int evsel__open_strerror(struct evsel *evsel, struct target *target,
                         int err, char *msg, size_t size);

static inline int evsel__group_idx(struct evsel *evsel)
{
        return evsel->core.idx - evsel->core.leader->idx;
}

/* Iterates group WITHOUT the leader. */
#define for_each_group_member(_evsel, _leader)                                  \
for ((_evsel) = list_entry((_leader)->core.node.next, struct evsel, core.node); \
     (_evsel) && (_evsel)->core.leader == (&_leader->core);                                     \
     (_evsel) = list_entry((_evsel)->core.node.next, struct evsel, core.node))

/* Iterates group WITH the leader. */
#define for_each_group_evsel(_evsel, _leader)                                   \
for ((_evsel) = _leader;                                                        \
     (_evsel) && (_evsel)->core.leader == (&_leader->core);                                     \
     (_evsel) = list_entry((_evsel)->core.node.next, struct evsel, core.node))

static inline bool evsel__has_branch_callstack(const struct evsel *evsel)
{
        return evsel->core.attr.branch_sample_type & PERF_SAMPLE_BRANCH_CALL_STACK;
}

static inline bool evsel__has_branch_hw_idx(const struct evsel *evsel)
{
        return evsel->core.attr.branch_sample_type & PERF_SAMPLE_BRANCH_HW_INDEX;
}

static inline bool evsel__has_callchain(const struct evsel *evsel)
{
        /*
         * For reporting purposes, an evsel sample can have a recorded callchain
         * or a callchain synthesized from AUX area data.
         */
        return evsel->core.attr.sample_type & PERF_SAMPLE_CALLCHAIN ||
               evsel->synth_sample_type & PERF_SAMPLE_CALLCHAIN;
}

static inline bool evsel__has_br_stack(const struct evsel *evsel)
{
        /*
         * For reporting purposes, an evsel sample can have a recorded branch
         * stack or a branch stack synthesized from AUX area data.
         */
        return evsel->core.attr.sample_type & PERF_SAMPLE_BRANCH_STACK ||
               evsel->synth_sample_type & PERF_SAMPLE_BRANCH_STACK;
}

static inline bool evsel__is_dummy_event(struct evsel *evsel)
{
        return (evsel->core.attr.type == PERF_TYPE_SOFTWARE) &&
               (evsel->core.attr.config == PERF_COUNT_SW_DUMMY);
}

struct perf_env *evsel__env(struct evsel *evsel);

int evsel__store_ids(struct evsel *evsel, struct evlist *evlist);

void evsel__zero_per_pkg(struct evsel *evsel);
bool evsel__is_hybrid(struct evsel *evsel);
struct evsel *evsel__leader(struct evsel *evsel);
bool evsel__has_leader(struct evsel *evsel, struct evsel *leader);
bool evsel__is_leader(struct evsel *evsel);
void evsel__set_leader(struct evsel *evsel, struct evsel *leader);
#endif /* __PERF_EVSEL_H */