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#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <locale.h>
#include <math.h>
#include <unistd.h>
#include <inttypes.h>
#include "igt_perf.h"
#include "igt_rapl.h"
#include "igt_sysfs.h"
static int rapl_parse(struct rapl *r, const char *str)
{
locale_t locale, oldlocale;
bool result = true;
char buf[128];
int dir;
memset(r, 0, sizeof(*r));
dir = open("/sys/devices/power", O_RDONLY);
if (dir < 0)
return -errno;
/* Replace user environment with plain C to match kernel format */
locale = newlocale(LC_ALL, "C", 0);
oldlocale = uselocale(locale);
result &= igt_sysfs_scanf(dir, "type", "%"PRIu64, &r->type) == 1;
snprintf(buf, sizeof(buf), "events/energy-%s", str);
result &= igt_sysfs_scanf(dir, buf, "event=%"PRIx64, &r->power) == 1;
snprintf(buf, sizeof(buf), "events/energy-%s.scale", str);
result &= igt_sysfs_scanf(dir, buf, "%lf", &r->scale) == 1;
uselocale(oldlocale);
freelocale(locale);
close(dir);
if (!result)
return -EINVAL;
if (isnan(r->scale) || !r->scale)
return -ERANGE;
return 0;
}
int rapl_open(struct rapl *r, const char *domain)
{
r->fd = rapl_parse(r, domain);
if (r->fd < 0)
goto err;
r->fd = igt_perf_open(r->type, r->power);
if (r->fd < 0) {
r->fd = -errno;
goto err;
}
return 0;
err:
errno = 0;
return r->fd;
}
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