From mboxrd@z Thu Jan 1 00:00:00 1970 From: Thara Gopinath Subject: [PATCH V2 2/2] PM / Domains: Extend generic power domain debugfs. Date: Tue, 13 Jun 2017 16:27:39 -0400 Message-ID: <1497385659-2356-3-git-send-email-thara.gopinath@linaro.org> References: <1497385659-2356-1-git-send-email-thara.gopinath@linaro.org> Return-path: Received: from mail-qt0-f178.google.com ([209.85.216.178]:34903 "EHLO mail-qt0-f178.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753845AbdFMU1w (ORCPT ); Tue, 13 Jun 2017 16:27:52 -0400 Received: by mail-qt0-f178.google.com with SMTP id w1so187990928qtg.2 for ; Tue, 13 Jun 2017 13:27:51 -0700 (PDT) In-Reply-To: <1497385659-2356-1-git-send-email-thara.gopinath@linaro.org> Sender: linux-pm-owner@vger.kernel.org List-Id: linux-pm@vger.kernel.org To: ulf.hansson@linaro.org, khilman@kernel.org, rjw@rjwysocki.net, gregkh@linuxfoundation.org, linux-pm@vger.kernel.org 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 --- drivers/base/power/domain.c | 203 ++++++++++++++++++++++++++++++++++++++++++-- 1 file changed, 195 insertions(+), 8 deletions(-) diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c index 33b4632..c1a0cd1 100644 --- a/drivers/base/power/domain.c +++ b/drivers/base/power/domain.c @@ -2322,21 +2322,189 @@ 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(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; + 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].idle_time, delta)); + seq_printf(s, "S%-15i %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; + int i, 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); @@ -2348,6 +2516,25 @@ 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); -- 2.1.4