From mboxrd@z Thu Jan 1 00:00:00 1970 From: Thara Gopinath Subject: [PATCH 2/2] PM / Domains: Extend generic power domain debugfs. Date: Thu, 25 May 2017 19:51:33 -0400 Message-ID: <1495756293-29534-3-git-send-email-thara.gopinath@linaro.org> References: <1495756293-29534-1-git-send-email-thara.gopinath@linaro.org> Return-path: Received: from mail-pf0-f178.google.com ([209.85.192.178]:32802 "EHLO mail-pf0-f178.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1161779AbdEYXvr (ORCPT ); Thu, 25 May 2017 19:51:47 -0400 Received: by mail-pf0-f178.google.com with SMTP id e193so180987194pfh.0 for ; Thu, 25 May 2017 16:51:47 -0700 (PDT) In-Reply-To: <1495756293-29534-1-git-send-email-thara.gopinath@linaro.org> Sender: linux-pm-owner@vger.kernel.org List-Id: linux-pm@vger.kernel.org To: linux-pm@vger.kernel.org, ulf.hansson@linaro.org, khilman@baylibre.com This patch extends the existing generic power domain debugfs. Changes involve the following - Remove the current flat format of displaying generic power domain summary. - 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. - slaves - Displays the sub power domains. - on_time - Displays the time the domain was in on state in ms. - 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 --- drivers/base/power/domain.c | 233 ++++++++++++++++++++++++++++---------------- 1 file changed, 150 insertions(+), 83 deletions(-) diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c index e733796..3c06e33 100644 --- a/drivers/base/power/domain.c +++ b/drivers/base/power/domain.c @@ -2214,137 +2214,204 @@ EXPORT_SYMBOL_GPL(of_genpd_parse_idle_states); #include static struct dentry *pm_genpd_debugfs_dir; -/* - * TODO: This function is a slightly modified version of rtpm_status_show - * from sysfs.c, so generalize it. - */ -static void rtpm_status_str(struct seq_file *s, struct device *dev) +static int pm_genpd_idle_states_show(struct seq_file *s, void *data) { - static const char * const status_lookup[] = { - [RPM_ACTIVE] = "active", - [RPM_RESUMING] = "resuming", - [RPM_SUSPENDED] = "suspended", - [RPM_SUSPENDING] = "suspending" - }; - const char *p = ""; - - if (dev->power.runtime_error) - p = "error"; - else if (dev->power.disable_depth) - p = "unsupported"; - else if (dev->power.runtime_status < ARRAY_SIZE(status_lookup)) - p = status_lookup[dev->power.runtime_status]; - else - WARN_ON(1); + struct generic_pm_domain *genpd = s->private; + int i, 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].active_time, delta)); + seq_printf(s, "S%-15i %lld\n", i, msecs); + } - seq_puts(s, p); + genpd_unlock(genpd); + return ret; } -static int pm_genpd_summary_one(struct seq_file *s, - struct generic_pm_domain *genpd) +static int pm_genpd_slaves_show(struct seq_file *s, void *data) { - static const char * const status_lookup[] = { - [GPD_STATE_ACTIVE] = "on", - [GPD_STATE_POWER_OFF] = "off" - }; - struct pm_domain_data *pm_data; - const char *kobj_path; + struct generic_pm_domain *genpd = s->private; struct gpd_link *link; - char state[16]; - int ret; + int ret = 0; ret = genpd_lock_interruptible(genpd); if (ret) return -ERESTARTSYS; - if (WARN_ON(genpd->status >= ARRAY_SIZE(status_lookup))) - goto exit; - if (!genpd_status_on(genpd)) - snprintf(state, sizeof(state), "%s-%u", - status_lookup[genpd->status], genpd->state_idx); - else - snprintf(state, sizeof(state), "%s", - status_lookup[genpd->status]); - seq_printf(s, "%-30s %-15s ", genpd->name, state); - - /* - * Modifications on the list require holding locks on both - * master and slave, so we are safe. - * Also genpd->name is immutable. - */ 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"); - 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; + genpd_unlock(genpd); + return ret; +} - seq_printf(s, "\n %-50s ", kobj_path); - rtpm_status_str(s, pm_data->dev); - kfree(kobj_path); - } +static int pm_genpd_status_show(struct seq_file *s, void *data) +{ + static const char * const status_lookup[] = { + [GPD_STATE_ACTIVE] = "on", + [GPD_STATE_POWER_OFF] = "off" + }; - seq_puts(s, "\n"); + struct generic_pm_domain *genpd = s->private; + int ret = 0; + + ret = genpd_lock_interruptible(genpd); + if (ret) + return -ERESTARTSYS; + + if (WARN_ON(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; +} - return 0; +static int pm_genpd_on_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_summary_show(struct seq_file *s, void *data) +static int pm_genpd_idle_time_show(struct seq_file *s, void *data) { - struct generic_pm_domain *genpd; + struct generic_pm_domain *genpd = s->private; + ktime_t delta = 0; int ret = 0; - seq_puts(s, "domain status slaves\n"); - seq_puts(s, " /device runtime status\n"); - seq_puts(s, "----------------------------------------------------------------------\n"); + ret = genpd_lock_interruptible(genpd); + if (ret) + return -ERESTARTSYS; + + if (genpd->status == GPD_STATE_POWER_OFF) + delta = ktime_sub(ktime_get(), genpd->accounting_time); + + seq_printf(s, "%lld ms\n", + ktime_to_ms(ktime_add(genpd->off_time, delta))); - ret = mutex_lock_interruptible(&gpd_list_lock); + 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(genpd, &gpd_list, gpd_list_node) { - ret = pm_genpd_summary_one(s, genpd); - if (ret) - break; + 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); } - mutex_unlock(&gpd_list_lock); + genpd_unlock(genpd); return ret; } -static int pm_genpd_summary_open(struct inode *inode, struct file *file) -{ - return single_open(file, pm_genpd_summary_show, NULL); +#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); \ } -static const struct file_operations pm_genpd_summary_fops = { - .open = pm_genpd_summary_open, - .read = seq_read, - .llseek = seq_lseek, - .release = single_release, -}; +define_pm_genpd_open_function(status); +define_pm_genpd_open_function(slaves); +define_pm_genpd_open_function(idle_states); +define_pm_genpd_open_function(on_time); +define_pm_genpd_open_function(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(status); +define_pm_genpd_debugfs_fops(slaves); +define_pm_genpd_debugfs_fops(idle_states); +define_pm_genpd_debugfs_fops(on_time); +define_pm_genpd_debugfs_fops(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); if (!pm_genpd_debugfs_dir) return -ENOMEM; - d = debugfs_create_file("pm_genpd_summary", S_IRUGO, - pm_genpd_debugfs_dir, NULL, &pm_genpd_summary_fops); - 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("slaves", 0444, + d, genpd, &pm_genpd_slaves_fops); + debugfs_create_file("idle_states", 0444, + d, genpd, &pm_genpd_idle_states_fops); + debugfs_create_file("on_time", 0444, + d, genpd, &pm_genpd_on_time_fops); + debugfs_create_file("idle_time", 0444, + d, genpd, &pm_genpd_idle_time_fops); + debugfs_create_file("devices", 0444, + d, genpd, &pm_genpd_devices_fops); + } return 0; } -- 2.1.4