From 411466c5081d2f649b3583cae0f6c9ad5edec636 Mon Sep 17 00:00:00 2001 From: Sudeep Holla Date: Tue, 3 May 2016 15:05:04 +0100 Subject: PM / OPP: add non-OF versions of dev_pm_opp_{cpumask_, }remove_table Functions dev_pm_opp_of_{cpumask_,}remove_table removes/frees all the static OPP entries associated with the device and/or all cpus(in case of cpumask) that are created from DT. However the OPP entries are populated reading from the firmware or some different method using dev_pm_opp_add are marked dynamic and can't be removed using above functions. This patch adds non DT/OF versions of dev_pm_opp_{cpumask_,}remove_table to support the above mentioned usecase. This is in preparation to make use of the same in scpi-cpufreq.c Signed-off-by: Sudeep Holla Acked-by: Viresh Kumar Reviewed-by: Stephen Boyd Signed-off-by: Rafael J. Wysocki --- drivers/base/power/opp/core.c | 58 ++++++++++++++++++++++++++++++----------- drivers/base/power/opp/cpu.c | 60 ++++++++++++++++++++++++++++++++----------- 2 files changed, 88 insertions(+), 30 deletions(-) (limited to 'drivers/base') diff --git a/drivers/base/power/opp/core.c b/drivers/base/power/opp/core.c index 433b600..9f8bf04 100644 --- a/drivers/base/power/opp/core.c +++ b/drivers/base/power/opp/core.c @@ -1845,21 +1845,11 @@ struct srcu_notifier_head *dev_pm_opp_get_notifier(struct device *dev) } EXPORT_SYMBOL_GPL(dev_pm_opp_get_notifier); -#ifdef CONFIG_OF -/** - * dev_pm_opp_of_remove_table() - Free OPP table entries created from static DT - * entries - * @dev: device pointer used to lookup OPP table. - * - * Free OPPs created using static entries present in DT. - * - * Locking: The internal opp_table and opp structures are RCU protected. - * Hence this function indirectly uses RCU updater strategy with mutex locks - * to keep the integrity of the internal data structures. Callers should ensure - * that this function is *NOT* called under RCU protection or in contexts where - * mutex cannot be locked. +/* + * Free OPPs either created using static entries present in DT or even the + * dynamically added entries based on remove_all param. */ -void dev_pm_opp_of_remove_table(struct device *dev) +static void _dev_pm_opp_remove_table(struct device *dev, bool remove_all) { struct opp_table *opp_table; struct dev_pm_opp *opp, *tmp; @@ -1884,7 +1874,7 @@ void dev_pm_opp_of_remove_table(struct device *dev) if (list_is_singular(&opp_table->dev_list)) { /* Free static OPPs */ list_for_each_entry_safe(opp, tmp, &opp_table->opp_list, node) { - if (!opp->dynamic) + if (remove_all || !opp->dynamic) _opp_remove(opp_table, opp, true); } } else { @@ -1894,6 +1884,44 @@ void dev_pm_opp_of_remove_table(struct device *dev) unlock: mutex_unlock(&opp_table_lock); } + +/** + * dev_pm_opp_remove_table() - Free all OPPs associated with the device + * @dev: device pointer used to lookup OPP table. + * + * Free both OPPs created using static entries present in DT and the + * dynamically added entries. + * + * Locking: The internal opp_table and opp structures are RCU protected. + * Hence this function indirectly uses RCU updater strategy with mutex locks + * to keep the integrity of the internal data structures. Callers should ensure + * that this function is *NOT* called under RCU protection or in contexts where + * mutex cannot be locked. + */ +void dev_pm_opp_remove_table(struct device *dev) +{ + _dev_pm_opp_remove_table(dev, true); +} +EXPORT_SYMBOL_GPL(dev_pm_opp_remove_table); + +#ifdef CONFIG_OF +/** + * dev_pm_opp_of_remove_table() - Free OPP table entries created from static DT + * entries + * @dev: device pointer used to lookup OPP table. + * + * Free OPPs created using static entries present in DT. + * + * Locking: The internal opp_table and opp structures are RCU protected. + * Hence this function indirectly uses RCU updater strategy with mutex locks + * to keep the integrity of the internal data structures. Callers should ensure + * that this function is *NOT* called under RCU protection or in contexts where + * mutex cannot be locked. + */ +void dev_pm_opp_of_remove_table(struct device *dev) +{ + _dev_pm_opp_remove_table(dev, false); +} EXPORT_SYMBOL_GPL(dev_pm_opp_of_remove_table); /* Returns opp descriptor node for a device, caller must do of_node_put() */ diff --git a/drivers/base/power/opp/cpu.c b/drivers/base/power/opp/cpu.c index 8e0b6349..357781e 100644 --- a/drivers/base/power/opp/cpu.c +++ b/drivers/base/power/opp/cpu.c @@ -119,20 +119,8 @@ void dev_pm_opp_free_cpufreq_table(struct device *dev, EXPORT_SYMBOL_GPL(dev_pm_opp_free_cpufreq_table); #endif /* CONFIG_CPU_FREQ */ -#ifdef CONFIG_OF -/** - * dev_pm_opp_of_cpumask_remove_table() - Removes OPP table for @cpumask - * @cpumask: cpumask for which OPP table needs to be removed - * - * This removes the OPP tables for CPUs present in the @cpumask. - * - * Locking: The internal opp_table and opp structures are RCU protected. - * Hence this function internally uses RCU updater strategy with mutex locks - * to keep the integrity of the internal data structures. Callers should ensure - * that this function is *NOT* called under RCU protection or in contexts where - * mutex cannot be locked. - */ -void dev_pm_opp_of_cpumask_remove_table(const struct cpumask *cpumask) +static void +_dev_pm_opp_cpumask_remove_table(const struct cpumask *cpumask, bool of) { struct device *cpu_dev; int cpu; @@ -147,9 +135,51 @@ void dev_pm_opp_of_cpumask_remove_table(const struct cpumask *cpumask) continue; } - dev_pm_opp_of_remove_table(cpu_dev); + if (of) + dev_pm_opp_of_remove_table(cpu_dev); + else + dev_pm_opp_remove_table(cpu_dev); } } + +/** + * dev_pm_opp_cpumask_remove_table() - Removes OPP table for @cpumask + * @cpumask: cpumask for which OPP table needs to be removed + * + * This removes the OPP tables for CPUs present in the @cpumask. + * This should be used to remove all the OPPs entries associated with + * the cpus in @cpumask. + * + * Locking: The internal opp_table and opp structures are RCU protected. + * Hence this function internally uses RCU updater strategy with mutex locks + * to keep the integrity of the internal data structures. Callers should ensure + * that this function is *NOT* called under RCU protection or in contexts where + * mutex cannot be locked. + */ +void dev_pm_opp_cpumask_remove_table(const struct cpumask *cpumask) +{ + _dev_pm_opp_cpumask_remove_table(cpumask, false); +} +EXPORT_SYMBOL_GPL(dev_pm_opp_cpumask_remove_table); + +#ifdef CONFIG_OF +/** + * dev_pm_opp_of_cpumask_remove_table() - Removes OPP table for @cpumask + * @cpumask: cpumask for which OPP table needs to be removed + * + * This removes the OPP tables for CPUs present in the @cpumask. + * This should be used only to remove static entries created from DT. + * + * Locking: The internal opp_table and opp structures are RCU protected. + * Hence this function internally uses RCU updater strategy with mutex locks + * to keep the integrity of the internal data structures. Callers should ensure + * that this function is *NOT* called under RCU protection or in contexts where + * mutex cannot be locked. + */ +void dev_pm_opp_of_cpumask_remove_table(const struct cpumask *cpumask) +{ + _dev_pm_opp_cpumask_remove_table(cpumask, true); +} EXPORT_SYMBOL_GPL(dev_pm_opp_of_cpumask_remove_table); /** -- cgit v1.1