@@ -2328,21 +2328,191 @@ static int pm_genpd_summary_show(struct seq_file *s, void *data)
return ret;
}
-static int pm_genpd_summary_open(struct inode *inode, struct file *file)
+static int pm_genpd_status_show(struct seq_file *s, void *data)
{
- return single_open(file, pm_genpd_summary_show, NULL);
+ static const char * const status_lookup[] = {
+ [GPD_STATE_ACTIVE] = "on",
+ [GPD_STATE_POWER_OFF] = "off"
+ };
+
+ struct generic_pm_domain *genpd = s->private;
+ int ret = 0;
+
+ ret = genpd_lock_interruptible(genpd);
+ if (ret)
+ return -ERESTARTSYS;
+
+ if (WARN_ON_ONCE(genpd->status >= ARRAY_SIZE(status_lookup)))
+ goto exit;
+
+ if (genpd->status == GPD_STATE_POWER_OFF)
+ seq_printf(s, "%s-%u\n", status_lookup[genpd->status],
+ genpd->state_idx);
+ else
+ seq_printf(s, "%s\n", status_lookup[genpd->status]);
+exit:
+ genpd_unlock(genpd);
+ return ret;
}
-static const struct file_operations pm_genpd_summary_fops = {
- .open = pm_genpd_summary_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
-};
+static int pm_genpd_sub_domains_show(struct seq_file *s, void *data)
+{
+ struct generic_pm_domain *genpd = s->private;
+ struct gpd_link *link;
+ int ret = 0;
+
+ ret = genpd_lock_interruptible(genpd);
+ if (ret)
+ return -ERESTARTSYS;
+
+ list_for_each_entry(link, &genpd->master_links, master_node) {
+ seq_printf(s, "%s", link->slave->name);
+ if (!list_is_last(&link->master_node, &genpd->master_links))
+ seq_puts(s, ", ");
+ }
+ seq_puts(s, "\n");
+
+ genpd_unlock(genpd);
+ return ret;
+}
+
+static int pm_genpd_idle_states_show(struct seq_file *s, void *data)
+{
+ struct generic_pm_domain *genpd = s->private;
+ unsigned int i;
+ int ret = 0;
+
+ ret = genpd_lock_interruptible(genpd);
+ if (ret)
+ return -ERESTARTSYS;
+
+ seq_puts(s, "State Time Spent(ms)\n");
+
+ for (i = 0; i < genpd->state_count; i++) {
+ ktime_t delta = 0;
+ s64 msecs;
+
+ if ((genpd->status == GPD_STATE_POWER_OFF) &&
+ (genpd->state_idx == i))
+ delta = ktime_sub(ktime_get(), genpd->accounting_time);
+
+ msecs = ktime_to_ms(
+ ktime_add(genpd->states[i].idle_time, delta));
+ seq_printf(s, "S%-13i %lld\n", i, msecs);
+ }
+
+ genpd_unlock(genpd);
+ return ret;
+}
+
+static int pm_genpd_active_time_show(struct seq_file *s, void *data)
+{
+ struct generic_pm_domain *genpd = s->private;
+ ktime_t delta = 0;
+ int ret = 0;
+
+ ret = genpd_lock_interruptible(genpd);
+ if (ret)
+ return -ERESTARTSYS;
+
+ if (genpd->status == GPD_STATE_ACTIVE)
+ delta = ktime_sub(ktime_get(), genpd->accounting_time);
+
+ seq_printf(s, "%lld ms\n", ktime_to_ms(
+ ktime_add(genpd->on_time, delta)));
+
+ genpd_unlock(genpd);
+ return ret;
+}
+
+static int pm_genpd_total_idle_time_show(struct seq_file *s, void *data)
+{
+ struct generic_pm_domain *genpd = s->private;
+ ktime_t delta = 0, total = 0;
+ unsigned int i;
+ int ret = 0;
+
+ ret = genpd_lock_interruptible(genpd);
+ if (ret)
+ return -ERESTARTSYS;
+
+ for (i = 0; i < genpd->state_count; i++) {
+
+ if ((genpd->status == GPD_STATE_POWER_OFF) &&
+ (genpd->state_idx == i))
+ delta = ktime_sub(ktime_get(), genpd->accounting_time);
+
+ total = ktime_add(total, genpd->states[i].idle_time);
+ }
+ total = ktime_add(total, delta);
+
+ seq_printf(s, "%lld ms\n", ktime_to_ms(total));
+
+ genpd_unlock(genpd);
+ return ret;
+}
+
+
+static int pm_genpd_devices_show(struct seq_file *s, void *data)
+{
+ struct generic_pm_domain *genpd = s->private;
+ struct pm_domain_data *pm_data;
+ const char *kobj_path;
+ int ret = 0;
+
+ ret = genpd_lock_interruptible(genpd);
+ if (ret)
+ return -ERESTARTSYS;
+
+ list_for_each_entry(pm_data, &genpd->dev_list, list_node) {
+ kobj_path = kobject_get_path(&pm_data->dev->kobj,
+ genpd_is_irq_safe(genpd) ?
+ GFP_ATOMIC : GFP_KERNEL);
+ if (kobj_path == NULL)
+ continue;
+
+ seq_printf(s, "%s\n", kobj_path);
+ kfree(kobj_path);
+ }
+
+ genpd_unlock(genpd);
+ return ret;
+}
+
+#define define_pm_genpd_open_function(name) \
+static int pm_genpd_##name##_open(struct inode *inode, struct file *file) \
+{ \
+ return single_open(file, pm_genpd_##name##_show, inode->i_private); \
+}
+
+define_pm_genpd_open_function(summary);
+define_pm_genpd_open_function(status);
+define_pm_genpd_open_function(sub_domains);
+define_pm_genpd_open_function(idle_states);
+define_pm_genpd_open_function(active_time);
+define_pm_genpd_open_function(total_idle_time);
+define_pm_genpd_open_function(devices);
+
+#define define_pm_genpd_debugfs_fops(name) \
+static const struct file_operations pm_genpd_##name##_fops = { \
+ .open = pm_genpd_##name##_open, \
+ .read = seq_read, \
+ .llseek = seq_lseek, \
+ .release = single_release, \
+}
+
+define_pm_genpd_debugfs_fops(summary);
+define_pm_genpd_debugfs_fops(status);
+define_pm_genpd_debugfs_fops(sub_domains);
+define_pm_genpd_debugfs_fops(idle_states);
+define_pm_genpd_debugfs_fops(active_time);
+define_pm_genpd_debugfs_fops(total_idle_time);
+define_pm_genpd_debugfs_fops(devices);
static int __init pm_genpd_debug_init(void)
{
struct dentry *d;
+ struct generic_pm_domain *genpd;
pm_genpd_debugfs_dir = debugfs_create_dir("pm_genpd", NULL);
@@ -2354,6 +2524,25 @@ static int __init pm_genpd_debug_init(void)
if (!d)
return -ENOMEM;
+ list_for_each_entry(genpd, &gpd_list, gpd_list_node) {
+ d = debugfs_create_dir(genpd->name, pm_genpd_debugfs_dir);
+ if (!d)
+ return -ENOMEM;
+
+ debugfs_create_file("current_state", 0444,
+ d, genpd, &pm_genpd_status_fops);
+ debugfs_create_file("sub_domains", 0444,
+ d, genpd, &pm_genpd_sub_domains_fops);
+ debugfs_create_file("idle_states", 0444,
+ d, genpd, &pm_genpd_idle_states_fops);
+ debugfs_create_file("active_time", 0444,
+ d, genpd, &pm_genpd_active_time_fops);
+ debugfs_create_file("total_idle_time", 0444,
+ d, genpd, &pm_genpd_total_idle_time_fops);
+ debugfs_create_file("devices", 0444,
+ d, genpd, &pm_genpd_devices_fops);
+ }
+
return 0;
}
late_initcall(pm_genpd_debug_init);
This patch extends the existing generic power domain debugfs. Changes involve the following - Introduce a unique debugfs entry for each generic power domain with the following attributes - current_state - Displays current state of the domain. - devices - Displays the devices associated with this domain. - sub_domains - Displays the sub power domains. - active_time - Displays the time the domain was in active state in ms. - total_idle_time - Displays the time the domain was in any of the idle states in ms. - idle_states - Displays the various idle states and the time spent in each idle state in ms. Signed-off-by: Thara Gopinath <thara.gopinath@linaro.org> --- drivers/base/power/domain.c | 205 ++++++++++++++++++++++++++++++++++++++++++-- 1 file changed, 197 insertions(+), 8 deletions(-) -- 2.1.4