diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/base/power/domain.c | 51 | ||||
| -rw-r--r-- | drivers/clocksource/sh_cmt.c | 8 | ||||
| -rw-r--r-- | drivers/clocksource/sh_mtu2.c | 4 | ||||
| -rw-r--r-- | drivers/clocksource/sh_tmu.c | 8 | ||||
| -rw-r--r-- | drivers/cpuidle/cpuidle-psci-domain.c | 2 | ||||
| -rw-r--r-- | drivers/cpuidle/cpuidle-psci.c | 34 | ||||
| -rw-r--r-- | drivers/cpuidle/cpuidle.c | 25 |
7 files changed, 100 insertions, 32 deletions
diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c index 92b750b865d5..52d292617401 100644 --- a/drivers/base/power/domain.c +++ b/drivers/base/power/domain.c @@ -1363,41 +1363,60 @@ static void genpd_complete(struct device *dev) genpd_unlock(genpd); } -/** - * genpd_syscore_switch - Switch power during system core suspend or resume. - * @dev: Device that normally is marked as "always on" to switch power for. - * - * This routine may only be called during the system core (syscore) suspend or - * resume phase for devices whose "always on" flags are set. - */ -static void genpd_syscore_switch(struct device *dev, bool suspend) +static void genpd_switch_state(struct device *dev, bool suspend) { struct generic_pm_domain *genpd; + bool use_lock; genpd = dev_to_genpd_safe(dev); if (!genpd) return; + use_lock = genpd_is_irq_safe(genpd); + + if (use_lock) + genpd_lock(genpd); + if (suspend) { genpd->suspended_count++; - genpd_sync_power_off(genpd, false, 0); + genpd_sync_power_off(genpd, use_lock, 0); } else { - genpd_sync_power_on(genpd, false, 0); + genpd_sync_power_on(genpd, use_lock, 0); genpd->suspended_count--; } + + if (use_lock) + genpd_unlock(genpd); } -void pm_genpd_syscore_poweroff(struct device *dev) +/** + * dev_pm_genpd_suspend - Synchronously try to suspend the genpd for @dev + * @dev: The device that is attached to the genpd, that can be suspended. + * + * This routine should typically be called for a device that needs to be + * suspended during the syscore suspend phase. It may also be called during + * suspend-to-idle to suspend a corresponding CPU device that is attached to a + * genpd. + */ +void dev_pm_genpd_suspend(struct device *dev) { - genpd_syscore_switch(dev, true); + genpd_switch_state(dev, true); } -EXPORT_SYMBOL_GPL(pm_genpd_syscore_poweroff); +EXPORT_SYMBOL_GPL(dev_pm_genpd_suspend); -void pm_genpd_syscore_poweron(struct device *dev) +/** + * dev_pm_genpd_resume - Synchronously try to resume the genpd for @dev + * @dev: The device that is attached to the genpd, which needs to be resumed. + * + * This routine should typically be called for a device that needs to be resumed + * during the syscore resume phase. It may also be called during suspend-to-idle + * to resume a corresponding CPU device that is attached to a genpd. + */ +void dev_pm_genpd_resume(struct device *dev) { - genpd_syscore_switch(dev, false); + genpd_switch_state(dev, false); } -EXPORT_SYMBOL_GPL(pm_genpd_syscore_poweron); +EXPORT_SYMBOL_GPL(dev_pm_genpd_resume); #else /* !CONFIG_PM_SLEEP */ diff --git a/drivers/clocksource/sh_cmt.c b/drivers/clocksource/sh_cmt.c index 760777458a90..7275d95de435 100644 --- a/drivers/clocksource/sh_cmt.c +++ b/drivers/clocksource/sh_cmt.c @@ -658,7 +658,7 @@ static void sh_cmt_clocksource_suspend(struct clocksource *cs) return; sh_cmt_stop(ch, FLAG_CLOCKSOURCE); - pm_genpd_syscore_poweroff(&ch->cmt->pdev->dev); + dev_pm_genpd_suspend(&ch->cmt->pdev->dev); } static void sh_cmt_clocksource_resume(struct clocksource *cs) @@ -668,7 +668,7 @@ static void sh_cmt_clocksource_resume(struct clocksource *cs) if (!ch->cs_enabled) return; - pm_genpd_syscore_poweron(&ch->cmt->pdev->dev); + dev_pm_genpd_resume(&ch->cmt->pdev->dev); sh_cmt_start(ch, FLAG_CLOCKSOURCE); } @@ -760,7 +760,7 @@ static void sh_cmt_clock_event_suspend(struct clock_event_device *ced) { struct sh_cmt_channel *ch = ced_to_sh_cmt(ced); - pm_genpd_syscore_poweroff(&ch->cmt->pdev->dev); + dev_pm_genpd_suspend(&ch->cmt->pdev->dev); clk_unprepare(ch->cmt->clk); } @@ -769,7 +769,7 @@ static void sh_cmt_clock_event_resume(struct clock_event_device *ced) struct sh_cmt_channel *ch = ced_to_sh_cmt(ced); clk_prepare(ch->cmt->clk); - pm_genpd_syscore_poweron(&ch->cmt->pdev->dev); + dev_pm_genpd_resume(&ch->cmt->pdev->dev); } static int sh_cmt_register_clockevent(struct sh_cmt_channel *ch, diff --git a/drivers/clocksource/sh_mtu2.c b/drivers/clocksource/sh_mtu2.c index bfccb31e94ad..169a1fccc497 100644 --- a/drivers/clocksource/sh_mtu2.c +++ b/drivers/clocksource/sh_mtu2.c @@ -297,12 +297,12 @@ static int sh_mtu2_clock_event_set_periodic(struct clock_event_device *ced) static void sh_mtu2_clock_event_suspend(struct clock_event_device *ced) { - pm_genpd_syscore_poweroff(&ced_to_sh_mtu2(ced)->mtu->pdev->dev); + dev_pm_genpd_suspend(&ced_to_sh_mtu2(ced)->mtu->pdev->dev); } static void sh_mtu2_clock_event_resume(struct clock_event_device *ced) { - pm_genpd_syscore_poweron(&ced_to_sh_mtu2(ced)->mtu->pdev->dev); + dev_pm_genpd_resume(&ced_to_sh_mtu2(ced)->mtu->pdev->dev); } static void sh_mtu2_register_clockevent(struct sh_mtu2_channel *ch, diff --git a/drivers/clocksource/sh_tmu.c b/drivers/clocksource/sh_tmu.c index d41df9ba3725..b00dec0655cb 100644 --- a/drivers/clocksource/sh_tmu.c +++ b/drivers/clocksource/sh_tmu.c @@ -292,7 +292,7 @@ static void sh_tmu_clocksource_suspend(struct clocksource *cs) if (--ch->enable_count == 0) { __sh_tmu_disable(ch); - pm_genpd_syscore_poweroff(&ch->tmu->pdev->dev); + dev_pm_genpd_suspend(&ch->tmu->pdev->dev); } } @@ -304,7 +304,7 @@ static void sh_tmu_clocksource_resume(struct clocksource *cs) return; if (ch->enable_count++ == 0) { - pm_genpd_syscore_poweron(&ch->tmu->pdev->dev); + dev_pm_genpd_resume(&ch->tmu->pdev->dev); __sh_tmu_enable(ch); } } @@ -394,12 +394,12 @@ static int sh_tmu_clock_event_next(unsigned long delta, static void sh_tmu_clock_event_suspend(struct clock_event_device *ced) { - pm_genpd_syscore_poweroff(&ced_to_sh_tmu(ced)->tmu->pdev->dev); + dev_pm_genpd_suspend(&ced_to_sh_tmu(ced)->tmu->pdev->dev); } static void sh_tmu_clock_event_resume(struct clock_event_device *ced) { - pm_genpd_syscore_poweron(&ced_to_sh_tmu(ced)->tmu->pdev->dev); + dev_pm_genpd_resume(&ced_to_sh_tmu(ced)->tmu->pdev->dev); } static void sh_tmu_register_clockevent(struct sh_tmu_channel *ch, diff --git a/drivers/cpuidle/cpuidle-psci-domain.c b/drivers/cpuidle/cpuidle-psci-domain.c index 4a031c62f92a..ff2c3f8e4668 100644 --- a/drivers/cpuidle/cpuidle-psci-domain.c +++ b/drivers/cpuidle/cpuidle-psci-domain.c @@ -327,6 +327,8 @@ struct device *psci_dt_attach_cpu(int cpu) if (cpu_online(cpu)) pm_runtime_get_sync(dev); + dev_pm_syscore_device(dev, true); + return dev; } diff --git a/drivers/cpuidle/cpuidle-psci.c b/drivers/cpuidle/cpuidle-psci.c index d928b37718bd..b51b5df08450 100644 --- a/drivers/cpuidle/cpuidle-psci.c +++ b/drivers/cpuidle/cpuidle-psci.c @@ -19,6 +19,7 @@ #include <linux/of_device.h> #include <linux/platform_device.h> #include <linux/psci.h> +#include <linux/pm_domain.h> #include <linux/pm_runtime.h> #include <linux/slab.h> #include <linux/string.h> @@ -52,8 +53,9 @@ static inline int psci_enter_state(int idx, u32 state) return CPU_PM_CPU_IDLE_ENTER_PARAM(psci_cpu_suspend_enter, idx, state); } -static int psci_enter_domain_idle_state(struct cpuidle_device *dev, - struct cpuidle_driver *drv, int idx) +static int __psci_enter_domain_idle_state(struct cpuidle_device *dev, + struct cpuidle_driver *drv, int idx, + bool s2idle) { struct psci_cpuidle_data *data = this_cpu_ptr(&psci_cpuidle_data); u32 *states = data->psci_states; @@ -66,7 +68,12 @@ static int psci_enter_domain_idle_state(struct cpuidle_device *dev, return -1; /* Do runtime PM to manage a hierarchical CPU toplogy. */ - RCU_NONIDLE(pm_runtime_put_sync_suspend(pd_dev)); + rcu_irq_enter_irqson(); + if (s2idle) + dev_pm_genpd_suspend(pd_dev); + else + pm_runtime_put_sync_suspend(pd_dev); + rcu_irq_exit_irqson(); state = psci_get_domain_state(); if (!state) @@ -74,7 +81,12 @@ static int psci_enter_domain_idle_state(struct cpuidle_device *dev, ret = psci_cpu_suspend_enter(state) ? -1 : idx; - RCU_NONIDLE(pm_runtime_get_sync(pd_dev)); + rcu_irq_enter_irqson(); + if (s2idle) + dev_pm_genpd_resume(pd_dev); + else + pm_runtime_get_sync(pd_dev); + rcu_irq_exit_irqson(); cpu_pm_exit(); @@ -83,6 +95,19 @@ static int psci_enter_domain_idle_state(struct cpuidle_device *dev, return ret; } +static int psci_enter_domain_idle_state(struct cpuidle_device *dev, + struct cpuidle_driver *drv, int idx) +{ + return __psci_enter_domain_idle_state(dev, drv, idx, false); +} + +static int psci_enter_s2idle_domain_idle_state(struct cpuidle_device *dev, + struct cpuidle_driver *drv, + int idx) +{ + return __psci_enter_domain_idle_state(dev, drv, idx, true); +} + static int psci_idle_cpuhp_up(unsigned int cpu) { struct device *pd_dev = __this_cpu_read(psci_cpuidle_data.dev); @@ -170,6 +195,7 @@ static int psci_dt_cpu_init_topology(struct cpuidle_driver *drv, * deeper states. */ drv->states[state_count - 1].enter = psci_enter_domain_idle_state; + drv->states[state_count - 1].enter_s2idle = psci_enter_s2idle_domain_idle_state; psci_cpuidle_use_cpuhp = true; return 0; diff --git a/drivers/cpuidle/cpuidle.c b/drivers/cpuidle/cpuidle.c index 83af15f77f66..ef2ea1b12cd8 100644 --- a/drivers/cpuidle/cpuidle.c +++ b/drivers/cpuidle/cpuidle.c @@ -368,6 +368,19 @@ void cpuidle_reflect(struct cpuidle_device *dev, int index) cpuidle_curr_governor->reflect(dev, index); } +/* + * Min polling interval of 10usec is a guess. It is assuming that + * for most users, the time for a single ping-pong workload like + * perf bench pipe would generally complete within 10usec but + * this is hardware dependant. Actual time can be estimated with + * + * perf bench sched pipe -l 10000 + * + * Run multiple times to avoid cpufreq effects. + */ +#define CPUIDLE_POLL_MIN 10000 +#define CPUIDLE_POLL_MAX (TICK_NSEC / 16) + /** * cpuidle_poll_time - return amount of time to poll for, * governors can override dev->poll_limit_ns if necessary @@ -382,15 +395,23 @@ u64 cpuidle_poll_time(struct cpuidle_driver *drv, int i; u64 limit_ns; + BUILD_BUG_ON(CPUIDLE_POLL_MIN > CPUIDLE_POLL_MAX); + if (dev->poll_limit_ns) return dev->poll_limit_ns; - limit_ns = TICK_NSEC; + limit_ns = CPUIDLE_POLL_MAX; for (i = 1; i < drv->state_count; i++) { + u64 state_limit; + if (dev->states_usage[i].disable) continue; - limit_ns = drv->states[i].target_residency_ns; + state_limit = drv->states[i].target_residency_ns; + if (state_limit < CPUIDLE_POLL_MIN) + continue; + + limit_ns = min_t(u64, state_limit, CPUIDLE_POLL_MAX); break; } |