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-rw-r--r--cpufreq/src/cpufreq-monitor-sysfs.c345
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diff --git a/cpufreq/src/cpufreq-monitor-sysfs.c b/cpufreq/src/cpufreq-monitor-sysfs.c
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+/*
+ * MATE CPUFreq Applet
+ * Copyright (C) 2004 Carlos Garcia Campos <[email protected]>
+ *
+ * This library 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; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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 library; if not, write to the Free
+ * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * Authors : Carlos Garc�a Campos <[email protected]>
+ */
+
+#include <glib.h>
+#include <glib/gi18n.h>
+
+#include <string.h>
+#include <stdlib.h>
+
+#include "cpufreq-monitor-sysfs.h"
+#include "cpufreq-utils.h"
+
+enum {
+ SCALING_MAX,
+ SCALING_MIN,
+ GOVERNOR,
+ CPUINFO_MAX,
+ SCALING_SETSPEED,
+ SCALING_CUR_FREQ,
+ N_FILES
+};
+
+static void cpufreq_monitor_sysfs_class_init (CPUFreqMonitorSysfsClass *klass);
+
+static gboolean cpufreq_monitor_sysfs_run (CPUFreqMonitor *monitor);
+static GList *cpufreq_monitor_sysfs_get_available_frequencies (CPUFreqMonitor *monitor);
+static GList *cpufreq_monitor_sysfs_get_available_governors (CPUFreqMonitor *monitor);
+
+static gchar *cpufreq_sysfs_read (const gchar *path,
+ GError **error);
+
+/* /sys/devices/system/cpu/cpu[0]/cpufreq/scaling_max_freq
+ * /sys/devices/system/cpu/cpu[0]/cpufreq/scaling_min_freq
+ * /sys/devices/system/cpu/cpu[0]/cpufreq/scaling_governor
+ * /sys/devices/system/cpu/cpu[0]/cpufreq/cpuinfo_max_freq
+ * /sys/devices/system/cpu/cpu[0]/cpufreq/scaling_setspeed (userspace)
+ * /sys/devices/system/cpu/cpu[0]/cpufreq/scaling_cur_freq (new governors)
+ */
+const gchar *monitor_sysfs_files[] = {
+ "scaling_max_freq",
+ "scaling_min_freq",
+ "scaling_governor",
+ "cpuinfo_max_freq",
+ "scaling_setspeed",
+ "scaling_cur_freq",
+ NULL
+};
+
+#define CPUFREQ_SYSFS_BASE_PATH "/sys/devices/system/cpu/cpu%u/cpufreq/%s"
+
+G_DEFINE_TYPE (CPUFreqMonitorSysfs, cpufreq_monitor_sysfs, CPUFREQ_TYPE_MONITOR)
+
+static void
+cpufreq_monitor_sysfs_init (CPUFreqMonitorSysfs *monitor)
+{
+}
+
+static GObject *
+cpufreq_monitor_sysfs_constructor (GType type,
+ guint n_construct_properties,
+ GObjectConstructParam *construct_params)
+{
+ GObject *object;
+ gchar *path;
+ gchar *frequency;
+ gint max_freq;
+ guint cpu;
+ GError *error = NULL;
+
+ object = G_OBJECT_CLASS (
+ cpufreq_monitor_sysfs_parent_class)->constructor (type,
+ n_construct_properties,
+ construct_params);
+ g_object_get (G_OBJECT (object),
+ "cpu", &cpu,
+ NULL);
+
+ path = g_strdup_printf (CPUFREQ_SYSFS_BASE_PATH,
+ cpu, monitor_sysfs_files[CPUINFO_MAX]);
+
+ frequency = cpufreq_sysfs_read (path, &error);
+ if (!frequency) {
+ g_warning ("%s", error->message);
+ g_error_free (error);
+ max_freq = -1;
+ } else {
+ max_freq = atoi (frequency);
+ }
+
+ g_free (path);
+ g_free (frequency);
+
+ g_object_set (G_OBJECT (object),
+ "max-frequency", max_freq,
+ NULL);
+
+ return object;
+}
+
+static void
+cpufreq_monitor_sysfs_class_init (CPUFreqMonitorSysfsClass *klass)
+{
+ GObjectClass *object_class = G_OBJECT_CLASS (klass);
+ CPUFreqMonitorClass *monitor_class = CPUFREQ_MONITOR_CLASS (klass);
+
+ object_class->constructor = cpufreq_monitor_sysfs_constructor;
+
+ monitor_class->run = cpufreq_monitor_sysfs_run;
+ monitor_class->get_available_frequencies = cpufreq_monitor_sysfs_get_available_frequencies;
+ monitor_class->get_available_governors = cpufreq_monitor_sysfs_get_available_governors;
+}
+
+CPUFreqMonitor *
+cpufreq_monitor_sysfs_new (guint cpu)
+{
+ CPUFreqMonitorSysfs *monitor;
+
+ monitor = g_object_new (CPUFREQ_TYPE_MONITOR_SYSFS,
+ "cpu", cpu, NULL);
+
+ return CPUFREQ_MONITOR (monitor);
+}
+
+static gchar *
+cpufreq_sysfs_read (const gchar *path,
+ GError **error)
+{
+ gchar *buffer = NULL;
+
+ if (!cpufreq_file_get_contents (path, &buffer, NULL, error)) {
+ return NULL;
+ }
+
+ return g_strchomp (buffer);
+}
+
+static gboolean
+cpufreq_sysfs_cpu_is_online (guint cpu)
+{
+ gchar *path;
+ gboolean retval;
+
+ path = g_strdup_printf ("/sys/devices/system/cpu/cpu%u/", cpu);
+ retval = g_file_test (path, G_FILE_TEST_IS_DIR);
+ g_free (path);
+
+ return retval;
+}
+
+static gboolean
+cpufreq_monitor_sysfs_run (CPUFreqMonitor *monitor)
+{
+ guint cpu;
+ gchar *frequency;
+ gchar *governor;
+ gchar *path;
+ GError *error = NULL;
+
+ g_object_get (G_OBJECT (monitor),
+ "cpu", &cpu,
+ NULL);
+
+ path = g_strdup_printf (CPUFREQ_SYSFS_BASE_PATH,
+ cpu, monitor_sysfs_files[GOVERNOR]);
+ governor = cpufreq_sysfs_read (path, &error);
+ if (!governor) {
+ gboolean retval = FALSE;
+
+ /* Check whether it failed because
+ * cpu is not online.
+ */
+ if (!cpufreq_sysfs_cpu_is_online (cpu)) {
+ g_object_set (G_OBJECT (monitor), "online", FALSE, NULL);
+ retval = TRUE;
+ } else {
+ g_warning ("%s", error->message);
+ }
+
+ g_error_free (error);
+ g_free (path);
+
+ return retval;
+ }
+
+ g_free (path);
+
+ if (g_ascii_strcasecmp (governor, "userspace") == 0) {
+ path = g_strdup_printf (CPUFREQ_SYSFS_BASE_PATH,
+ cpu, monitor_sysfs_files[SCALING_SETSPEED]);
+ } else if (g_ascii_strcasecmp (governor, "powersave") == 0) {
+ path = g_strdup_printf (CPUFREQ_SYSFS_BASE_PATH,
+ cpu, monitor_sysfs_files[SCALING_MIN]);
+ } else if (g_ascii_strcasecmp (governor, "performance") == 0) {
+ path = g_strdup_printf (CPUFREQ_SYSFS_BASE_PATH,
+ cpu, monitor_sysfs_files[SCALING_MAX]);
+ } else { /* Ondemand, Conservative, ... */
+ path = g_strdup_printf (CPUFREQ_SYSFS_BASE_PATH,
+ cpu, monitor_sysfs_files[SCALING_CUR_FREQ]);
+ }
+
+ frequency = cpufreq_sysfs_read (path, &error);
+ if (!frequency) {
+ g_warning ("%s", error->message);
+ g_error_free (error);
+ g_free (path);
+ g_free (governor);
+
+ return FALSE;
+ }
+
+ g_free (path);
+
+ g_object_set (G_OBJECT (monitor),
+ "online", TRUE,
+ "governor", governor,
+ "frequency", atoi (frequency),
+ NULL);
+
+ g_free (governor);
+ g_free (frequency);
+
+ return TRUE;
+}
+
+static gint
+compare (gconstpointer a, gconstpointer b)
+{
+ gint aa, bb;
+
+ aa = atoi ((gchar *) a);
+ bb = atoi ((gchar *) b);
+
+ if (aa == bb)
+ return 0;
+ else if (aa > bb)
+ return -1;
+ else
+ return 1;
+}
+
+static GList *
+cpufreq_monitor_sysfs_get_available_frequencies (CPUFreqMonitor *monitor)
+{
+ gchar *path;
+ GList *list = NULL;
+ gchar **frequencies = NULL;
+ gint i;
+ guint cpu;
+ gchar *buffer = NULL;
+ GError *error = NULL;
+
+ g_object_get (G_OBJECT (monitor),
+ "cpu", &cpu, NULL);
+
+ path = g_strdup_printf (CPUFREQ_SYSFS_BASE_PATH, cpu,
+ "scaling_available_frequencies");
+
+ if (!cpufreq_file_get_contents (path, &buffer, NULL, &error)) {
+ g_warning ("%s", error->message);
+ g_error_free (error);
+
+ g_free (path);
+
+ return NULL;
+ }
+
+ g_free (path);
+
+ buffer = g_strchomp (buffer);
+ frequencies = g_strsplit (buffer, " ", -1);
+
+ i = 0;
+ while (frequencies[i]) {
+ if (!g_list_find_custom (list, frequencies[i], compare))
+ list = g_list_prepend (list, g_strdup (frequencies[i]));
+ i++;
+ }
+
+ g_strfreev (frequencies);
+ g_free (buffer);
+
+ return g_list_sort (list, compare);
+}
+
+static GList *
+cpufreq_monitor_sysfs_get_available_governors (CPUFreqMonitor *monitor)
+{
+ gchar *path;
+ GList *list = NULL;
+ gchar **governors = NULL;
+ gint i;
+ guint cpu;
+ gchar *buffer = NULL;
+ GError *error = NULL;
+
+ g_object_get (G_OBJECT (monitor),
+ "cpu", &cpu, NULL);
+
+ path = g_strdup_printf (CPUFREQ_SYSFS_BASE_PATH, cpu,
+ "scaling_available_governors");
+
+ if (!cpufreq_file_get_contents (path, &buffer, NULL, &error)) {
+ g_warning ("%s", error->message);
+ g_error_free (error);
+
+ g_free (path);
+
+ return NULL;
+ }
+
+ g_free (path);
+
+ buffer = g_strchomp (buffer);
+
+ governors = g_strsplit (buffer, " ", -1);
+
+ i = 0;
+ while (governors[i] != NULL) {
+ list = g_list_prepend (list, g_strdup (governors[i]));
+ i++;
+ }
+
+ g_strfreev (governors);
+ g_free (buffer);
+
+ return list;
+}