#include <linux/list.h>
#include <linux/compiler.h>
#include <sys/types.h>
#include <unistd.h>
#include <stdio.h>
#include <stdbool.h>
#include <stdarg.h>
#include <dirent.h>
#include <api/fs/fs.h>
#include <locale.h>
#include "util.h"
#include "pmu.h"
#include "parse-events.h"
#include "cpumap.h"
#include "header.h"
#include "pmu-events/pmu-events.h"
#include "cache.h"
struct perf_pmu_format {
char *name;
int value;
DECLARE_BITMAP(bits, PERF_PMU_FORMAT_BITS);
struct list_head list;
};
#define EVENT_SOURCE_DEVICE_PATH "/bus/event_source/devices/"
int perf_pmu_parse(struct list_head *list, char *name);
extern FILE *perf_pmu_in;
static LIST_HEAD(pmus);
/*
* Parse & process all the sysfs attributes located under
* the directory specified in 'dir' parameter.
*/
int perf_pmu__format_parse(char *dir, struct list_head *head)
{
struct dirent *evt_ent;
DIR *format_dir;
int ret = 0;
format_dir = opendir(dir);
if (!format_dir)
return -EINVAL;
while (!ret && (evt_ent = readdir(format_dir))) {
char path[PATH_MAX];
char *name = evt_ent->d_name;
FILE *file;
if (!strcmp(name, ".") || !strcmp(name, ".."))
continue;
snprintf(path, PATH_MAX, "%s/%s", dir, name);
ret = -EINVAL;
file = fopen(path, "r");
if (!file)
break;
perf_pmu_in = file;
ret = perf_pmu_parse(head, name);
fclose(file);
}
closedir(format_dir);
return ret;
}
/*
* Reading/parsing the default pmu format definition, which should be
* located at:
* /sys/bus/event_source/devices/<dev>/format as sysfs group attributes.
*/
static int pmu_format(const char *name, struct list_head *format)
{
struct stat st;
char path[PATH_MAX];
const char *sysfs = sysfs__mountpoint();
if (!sysfs)
return -1;
snprintf(path, PATH_MAX,
"%s" EVENT_SOURCE_DEVICE_PATH "%s/format", sysfs, name);
if (stat(path, &st) < 0)
return 0; /* no error if format does not exist */
if (perf_pmu__format_parse(path, format))
return -1;
return 0;
}
static int perf_pmu__parse_scale(struct perf_pmu_alias *alias, char