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/*
* Copyright 2010, Intel Corporation
*
* This file is part of PowerTOP
*
* This program file is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program in a file named COPYING; if not, write to the
* Free Software Foundation, Inc,
* 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301 USA
* or just google for it.
*
* Authors:
* Arjan van de Ven <arjan@linux.intel.com>
*/
#include "tuning.h"
#include "tunable.h"
#include "unistd.h"
#include "tuningsysfs.h"
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <utility>
#include <iostream>
#include <fstream>
#include <unistd.h>
#include <sys/types.h>
#include <dirent.h>
#include <limits.h>
#include "../lib.h"
sysfs_tunable::sysfs_tunable(const char *str, const char *_sysfs_path, const char *_target_content) : tunable(str, 1.0, _("Good"), _("Bad"), _("Unknown"))
{
pt_strcpy(sysfs_path, _sysfs_path);
pt_strcpy(target_value, _target_content);
bad_value[0] = 0;
snprintf(toggle_good, sizeof(toggle_good), "echo '%s' > '%s';", target_value, sysfs_path);
snprintf(toggle_bad, sizeof(toggle_bad), "echo '%s' > '%s';", bad_value, sysfs_path);
}
int sysfs_tunable::good_bad(void)
{
char current_value[4096], *c;
ifstream file;
file.open(sysfs_path, ios::in);
if (!file)
return TUNE_NEUTRAL;
file.getline(current_value, 4096);
file.close();
c = strchr(current_value, '\n');
if (c)
*c = 0;
if (strcmp(current_value, target_value) == 0)
return TUNE_GOOD;
pt_strcpy(bad_value, current_value);
return TUNE_BAD;
}
void sysfs_tunable::toggle(void)
{
int good;
good = good_bad();
if (good == TUNE_GOOD) {
if (strlen(bad_value) > 0)
write_sysfs(sysfs_path, bad_value);
return;
}
write_sysfs(sysfs_path, target_value);
}
const char *sysfs_tunable::toggle_script(void) {
int good;
good = good_bad();
if (good == TUNE_GOOD) {
if (strlen(bad_value) > 0)
return toggle_bad;
return NULL;
}
return toggle_good;
}
void add_sysfs_tunable(const char *str, const char *_sysfs_path, const char *_target_content)
{
class sysfs_tunable *tunable;
if (access(_sysfs_path, R_OK) != 0)
return;
tunable = new class sysfs_tunable(str, _sysfs_path, _target_content);
all_tunables.push_back(tunable);
}
static void add_sata_tunables_callback(const char *d_name)
{
char filename[PATH_MAX];
char msg[4096];
snprintf(filename, sizeof(filename), "/sys/class/scsi_host/%s/link_power_management_policy", d_name);
snprintf(msg, sizeof(msg), _("Enable SATA link power management for %s"), d_name);
add_sysfs_tunable(msg, filename, "med_power_with_dipm");
}
void add_sata_tunables(void)
{
process_directory("/sys/class/scsi_host", add_sata_tunables_callback);
}
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