107 lines
2.4 KiB
C
107 lines
2.4 KiB
C
/*
|
|
* Copyright 2007, 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
|
|
*
|
|
* Authors:
|
|
* Arjan van de Ven <arjan@linux.intel.com>
|
|
*/
|
|
|
|
#include <unistd.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <stdint.h>
|
|
#include <sys/types.h>
|
|
#include <dirent.h>
|
|
|
|
#include "powertop.h"
|
|
|
|
int alpm_activated;
|
|
|
|
static void activate_alpm(void)
|
|
{
|
|
DIR *dir;
|
|
struct dirent *dirent;
|
|
FILE *file;
|
|
char filename[PATH_MAX];
|
|
|
|
dir = opendir("/sys/class/scsi_host");
|
|
if (!dir)
|
|
return;
|
|
|
|
while ((dirent = readdir(dir))) {
|
|
if (dirent->d_name[0]=='.')
|
|
continue;
|
|
sprintf(filename, "/sys/class/scsi_host/%s/link_power_management_policy", dirent->d_name);
|
|
file = fopen(filename, "w");
|
|
if (!file)
|
|
continue;
|
|
fprintf(file, "min_power\n");
|
|
fclose(file);
|
|
}
|
|
|
|
closedir(dir);
|
|
alpm_activated = 1;
|
|
}
|
|
|
|
void suggest_sata_alpm(void)
|
|
{
|
|
DIR *dir;
|
|
struct dirent *dirent;
|
|
FILE *file;
|
|
char filename[PATH_MAX];
|
|
char line[1024];
|
|
int need_hint = 0;
|
|
|
|
if (alpm_activated)
|
|
return;
|
|
|
|
|
|
dir = opendir("/sys/class/scsi_host/");
|
|
if (!dir)
|
|
return;
|
|
|
|
while ((dirent = readdir(dir))) {
|
|
if (dirent->d_name[0]=='.')
|
|
continue;
|
|
sprintf(filename, "/sys/class/scsi_host/%s/link_power_management_policy", dirent->d_name);
|
|
file = fopen(filename, "r");
|
|
if (!file)
|
|
continue;
|
|
memset(line, 0, 1024);
|
|
if (fgets(line, 1023,file)==NULL) {
|
|
fclose(file);
|
|
continue;
|
|
}
|
|
if (!strstr(line, "min_power"))
|
|
need_hint = 1;
|
|
|
|
fclose(file);
|
|
}
|
|
|
|
closedir(dir);
|
|
|
|
if (need_hint) {
|
|
add_suggestion(_("Suggestion: Enable SATA ALPM link power management via: \n"
|
|
" echo min_power > /sys/class/scsi_host/host0/link_power_management_policy\n"
|
|
"or press the S key."),
|
|
15, 'S', _(" S - SATA Link Power Management "), activate_alpm);
|
|
}
|
|
}
|