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PM / Domains: Extend generic power domain debugfs
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> Acked-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Thara Gopinath
Rafael J. Wysocki
parent
afece3ab9a
commit
b6a1d093f9
@ -2359,7 +2359,7 @@ exit:
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return 0;
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}
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static int pm_genpd_summary_show(struct seq_file *s, void *data)
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static int genpd_summary_show(struct seq_file *s, void *data)
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{
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struct generic_pm_domain *genpd;
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int ret = 0;
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@ -2382,21 +2382,187 @@ static int pm_genpd_summary_show(struct seq_file *s, void *data)
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return ret;
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}
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static int pm_genpd_summary_open(struct inode *inode, struct file *file)
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static int genpd_status_show(struct seq_file *s, void *data)
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{
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return single_open(file, pm_genpd_summary_show, NULL);
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static const char * const status_lookup[] = {
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[GPD_STATE_ACTIVE] = "on",
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[GPD_STATE_POWER_OFF] = "off"
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};
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struct generic_pm_domain *genpd = s->private;
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int ret = 0;
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ret = genpd_lock_interruptible(genpd);
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if (ret)
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return -ERESTARTSYS;
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if (WARN_ON_ONCE(genpd->status >= ARRAY_SIZE(status_lookup)))
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goto exit;
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if (genpd->status == GPD_STATE_POWER_OFF)
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seq_printf(s, "%s-%u\n", status_lookup[genpd->status],
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genpd->state_idx);
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else
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seq_printf(s, "%s\n", status_lookup[genpd->status]);
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exit:
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genpd_unlock(genpd);
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return ret;
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}
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static const struct file_operations pm_genpd_summary_fops = {
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.open = pm_genpd_summary_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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};
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static int genpd_sub_domains_show(struct seq_file *s, void *data)
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{
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struct generic_pm_domain *genpd = s->private;
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struct gpd_link *link;
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int ret = 0;
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ret = genpd_lock_interruptible(genpd);
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if (ret)
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return -ERESTARTSYS;
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list_for_each_entry(link, &genpd->master_links, master_node)
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seq_printf(s, "%s\n", link->slave->name);
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genpd_unlock(genpd);
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return ret;
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}
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static int genpd_idle_states_show(struct seq_file *s, void *data)
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{
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struct generic_pm_domain *genpd = s->private;
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unsigned int i;
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int ret = 0;
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ret = genpd_lock_interruptible(genpd);
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if (ret)
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return -ERESTARTSYS;
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seq_puts(s, "State Time Spent(ms)\n");
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for (i = 0; i < genpd->state_count; i++) {
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ktime_t delta = 0;
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s64 msecs;
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if ((genpd->status == GPD_STATE_POWER_OFF) &&
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(genpd->state_idx == i))
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delta = ktime_sub(ktime_get(), genpd->accounting_time);
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msecs = ktime_to_ms(
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ktime_add(genpd->states[i].idle_time, delta));
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seq_printf(s, "S%-13i %lld\n", i, msecs);
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}
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genpd_unlock(genpd);
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return ret;
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}
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static int genpd_active_time_show(struct seq_file *s, void *data)
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{
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struct generic_pm_domain *genpd = s->private;
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ktime_t delta = 0;
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int ret = 0;
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ret = genpd_lock_interruptible(genpd);
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if (ret)
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return -ERESTARTSYS;
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if (genpd->status == GPD_STATE_ACTIVE)
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delta = ktime_sub(ktime_get(), genpd->accounting_time);
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seq_printf(s, "%lld ms\n", ktime_to_ms(
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ktime_add(genpd->on_time, delta)));
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genpd_unlock(genpd);
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return ret;
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}
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static int genpd_total_idle_time_show(struct seq_file *s, void *data)
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{
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struct generic_pm_domain *genpd = s->private;
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ktime_t delta = 0, total = 0;
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unsigned int i;
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int ret = 0;
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ret = genpd_lock_interruptible(genpd);
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if (ret)
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return -ERESTARTSYS;
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for (i = 0; i < genpd->state_count; i++) {
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if ((genpd->status == GPD_STATE_POWER_OFF) &&
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(genpd->state_idx == i))
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delta = ktime_sub(ktime_get(), genpd->accounting_time);
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total = ktime_add(total, genpd->states[i].idle_time);
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}
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total = ktime_add(total, delta);
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seq_printf(s, "%lld ms\n", ktime_to_ms(total));
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genpd_unlock(genpd);
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return ret;
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}
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static int genpd_devices_show(struct seq_file *s, void *data)
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{
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struct generic_pm_domain *genpd = s->private;
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struct pm_domain_data *pm_data;
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const char *kobj_path;
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int ret = 0;
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ret = genpd_lock_interruptible(genpd);
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if (ret)
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return -ERESTARTSYS;
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list_for_each_entry(pm_data, &genpd->dev_list, list_node) {
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kobj_path = kobject_get_path(&pm_data->dev->kobj,
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genpd_is_irq_safe(genpd) ?
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GFP_ATOMIC : GFP_KERNEL);
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if (kobj_path == NULL)
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continue;
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seq_printf(s, "%s\n", kobj_path);
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kfree(kobj_path);
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}
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genpd_unlock(genpd);
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return ret;
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}
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#define define_genpd_open_function(name) \
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static int genpd_##name##_open(struct inode *inode, struct file *file) \
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{ \
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return single_open(file, genpd_##name##_show, inode->i_private); \
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}
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define_genpd_open_function(summary);
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define_genpd_open_function(status);
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define_genpd_open_function(sub_domains);
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define_genpd_open_function(idle_states);
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define_genpd_open_function(active_time);
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define_genpd_open_function(total_idle_time);
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define_genpd_open_function(devices);
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#define define_genpd_debugfs_fops(name) \
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static const struct file_operations genpd_##name##_fops = { \
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.open = genpd_##name##_open, \
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.read = seq_read, \
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.llseek = seq_lseek, \
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.release = single_release, \
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}
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define_genpd_debugfs_fops(summary);
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define_genpd_debugfs_fops(status);
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define_genpd_debugfs_fops(sub_domains);
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define_genpd_debugfs_fops(idle_states);
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define_genpd_debugfs_fops(active_time);
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define_genpd_debugfs_fops(total_idle_time);
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define_genpd_debugfs_fops(devices);
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static int __init pm_genpd_debug_init(void)
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{
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struct dentry *d;
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struct generic_pm_domain *genpd;
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pm_genpd_debugfs_dir = debugfs_create_dir("pm_genpd", NULL);
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@ -2404,10 +2570,29 @@ static int __init pm_genpd_debug_init(void)
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return -ENOMEM;
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d = debugfs_create_file("pm_genpd_summary", S_IRUGO,
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pm_genpd_debugfs_dir, NULL, &pm_genpd_summary_fops);
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pm_genpd_debugfs_dir, NULL, &genpd_summary_fops);
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if (!d)
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return -ENOMEM;
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list_for_each_entry(genpd, &gpd_list, gpd_list_node) {
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d = debugfs_create_dir(genpd->name, pm_genpd_debugfs_dir);
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if (!d)
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return -ENOMEM;
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debugfs_create_file("current_state", 0444,
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d, genpd, &genpd_status_fops);
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debugfs_create_file("sub_domains", 0444,
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d, genpd, &genpd_sub_domains_fops);
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debugfs_create_file("idle_states", 0444,
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d, genpd, &genpd_idle_states_fops);
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debugfs_create_file("active_time", 0444,
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d, genpd, &genpd_active_time_fops);
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debugfs_create_file("total_idle_time", 0444,
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d, genpd, &genpd_total_idle_time_fops);
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debugfs_create_file("devices", 0444,
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d, genpd, &genpd_devices_fops);
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}
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return 0;
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}
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late_initcall(pm_genpd_debug_init);
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