diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/base/power/domain.c | 253 | ||||
| -rw-r--r-- | drivers/base/power/generic_ops.c | 157 | ||||
| -rw-r--r-- | drivers/base/power/main.c | 247 | ||||
| -rw-r--r-- | drivers/base/power/power.h | 4 | ||||
| -rw-r--r-- | drivers/base/power/qos.c | 61 | ||||
| -rw-r--r-- | drivers/base/power/sysfs.c | 47 | ||||
| -rw-r--r-- | drivers/base/power/wakeup.c | 85 | ||||
| -rw-r--r-- | drivers/clocksource/sh_cmt.c | 4 | ||||
| -rw-r--r-- | drivers/clocksource/sh_mtu2.c | 4 | ||||
| -rw-r--r-- | drivers/clocksource/sh_tmu.c | 4 | ||||
| -rw-r--r-- | drivers/devfreq/devfreq.c | 112 | ||||
| -rw-r--r-- | drivers/devfreq/exynos4_bus.c | 23 | ||||
| -rw-r--r-- | drivers/devfreq/governor_performance.c | 5 | ||||
| -rw-r--r-- | drivers/devfreq/governor_powersave.c | 2 | ||||
| -rw-r--r-- | drivers/devfreq/governor_simpleondemand.c | 12 | ||||
| -rw-r--r-- | drivers/devfreq/governor_userspace.c | 15 | ||||
| -rw-r--r-- | drivers/mmc/host/sh_mmcif.c | 5 | ||||
| -rw-r--r-- | drivers/mmc/host/tmio_mmc_pio.c | 5 | ||||
| -rw-r--r-- | drivers/xen/manage.c | 6 |
19 files changed, 869 insertions, 182 deletions
diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c index 978bbf7ac6af..73ce9fbe9839 100644 --- a/drivers/base/power/domain.c +++ b/drivers/base/power/domain.c @@ -366,7 +366,7 @@ static int pm_genpd_poweroff(struct generic_pm_domain *genpd) not_suspended = 0; list_for_each_entry(pdd, &genpd->dev_list, list_node) if (pdd->dev->driver && (!pm_runtime_suspended(pdd->dev) - || pdd->dev->power.irq_safe)) + || pdd->dev->power.irq_safe || to_gpd_data(pdd)->always_on)) not_suspended++; if (not_suspended > genpd->in_progress) @@ -503,6 +503,9 @@ static int pm_genpd_runtime_suspend(struct device *dev) might_sleep_if(!genpd->dev_irq_safe); + if (dev_gpd_data(dev)->always_on) + return -EBUSY; + stop_ok = genpd->gov ? genpd->gov->stop_ok : NULL; if (stop_ok && !stop_ok(dev)) return -EBUSY; @@ -764,8 +767,10 @@ static int pm_genpd_prepare(struct device *dev) genpd_acquire_lock(genpd); - if (genpd->prepared_count++ == 0) + if (genpd->prepared_count++ == 0) { + genpd->suspended_count = 0; genpd->suspend_power_off = genpd->status == GPD_STATE_POWER_OFF; + } genpd_release_lock(genpd); @@ -820,17 +825,16 @@ static int pm_genpd_suspend(struct device *dev) } /** - * pm_genpd_suspend_noirq - Late suspend of a device from an I/O PM domain. + * pm_genpd_suspend_late - Late suspend of a device from an I/O PM domain. * @dev: Device to suspend. * * Carry out a late suspend of a device under the assumption that its * pm_domain field points to the domain member of an object of type * struct generic_pm_domain representing a PM domain consisting of I/O devices. */ -static int pm_genpd_suspend_noirq(struct device *dev) +static int pm_genpd_suspend_late(struct device *dev) { struct generic_pm_domain *genpd; - int ret; dev_dbg(dev, "%s()\n", __func__); @@ -838,14 +842,28 @@ static int pm_genpd_suspend_noirq(struct device *dev) if (IS_ERR(genpd)) return -EINVAL; - if (genpd->suspend_power_off) - return 0; + return genpd->suspend_power_off ? 0 : genpd_suspend_late(genpd, dev); +} - ret = genpd_suspend_late(genpd, dev); - if (ret) - return ret; +/** + * pm_genpd_suspend_noirq - Completion of suspend of device in an I/O PM domain. + * @dev: Device to suspend. + * + * Stop the device and remove power from the domain if all devices in it have + * been stopped. + */ +static int pm_genpd_suspend_noirq(struct device *dev) +{ + struct generic_pm_domain *genpd; - if (dev->power.wakeup_path && genpd_dev_active_wakeup(genpd, dev)) + dev_dbg(dev, "%s()\n", __func__); + + genpd = dev_to_genpd(dev); + if (IS_ERR(genpd)) + return -EINVAL; + + if (genpd->suspend_power_off || dev_gpd_data(dev)->always_on + || (dev->power.wakeup_path && genpd_dev_active_wakeup(genpd, dev))) return 0; genpd_stop_dev(genpd, dev); @@ -862,13 +880,10 @@ static int pm_genpd_suspend_noirq(struct device *dev) } /** - * pm_genpd_resume_noirq - Early resume of a device from an I/O power domain. + * pm_genpd_resume_noirq - Start of resume of device in an I/O PM domain. * @dev: Device to resume. * - * Carry out an early resume of a device under the assumption that its - * pm_domain field points to the domain member of an object of type - * struct generic_pm_domain representing a power domain consisting of I/O - * devices. + * Restore power to the device's PM domain, if necessary, and start the device. */ static int pm_genpd_resume_noirq(struct device *dev) { @@ -880,7 +895,8 @@ static int pm_genpd_resume_noirq(struct device *dev) if (IS_ERR(genpd)) return -EINVAL; - if (genpd->suspend_power_off) + if (genpd->suspend_power_off || dev_gpd_data(dev)->always_on + || (dev->power.wakeup_path && genpd_dev_active_wakeup(genpd, dev))) return 0; /* @@ -890,13 +906,34 @@ static int pm_genpd_resume_noirq(struct device *dev) */ pm_genpd_poweron(genpd); genpd->suspended_count--; - genpd_start_dev(genpd, dev); - return genpd_resume_early(genpd, dev); + return genpd_start_dev(genpd, dev); } /** - * pm_genpd_resume - Resume a device belonging to an I/O power domain. + * pm_genpd_resume_early - Early resume of a device in an I/O PM domain. + * @dev: Device to resume. + * + * Carry out an early resume of a device under the assumption that its + * pm_domain field points to the domain member of an object of type + * struct generic_pm_domain representing a power domain consisting of I/O + * devices. + */ +static int pm_genpd_resume_early(struct device *dev) +{ + struct generic_pm_domain *genpd; + + dev_dbg(dev, "%s()\n", __func__); + + genpd = dev_to_genpd(dev); + if (IS_ERR(genpd)) + return -EINVAL; + + return genpd->suspend_power_off ? 0 : genpd_resume_early(genpd, dev); +} + +/** + * pm_genpd_resume - Resume of device in an I/O PM domain. * @dev: Device to resume. * * Resume a device under the assumption that its pm_domain field points to the @@ -917,7 +954,7 @@ static int pm_genpd_resume(struct device *dev) } /** - * pm_genpd_freeze - Freeze a device belonging to an I/O power domain. + * pm_genpd_freeze - Freezing a device in an I/O PM domain. * @dev: Device to freeze. * * Freeze a device under the assumption that its pm_domain field points to the @@ -938,7 +975,29 @@ static int pm_genpd_freeze(struct device *dev) } /** - * pm_genpd_freeze_noirq - Late freeze of a device from an I/O power domain. + * pm_genpd_freeze_late - Late freeze of a device in an I/O PM domain. + * @dev: Device to freeze. + * + * Carry out a late freeze of a device under the assumption that its + * pm_domain field points to the domain member of an object of type + * struct generic_pm_domain representing a power domain consisting of I/O + * devices. + */ +static int pm_genpd_freeze_late(struct device *dev) +{ + struct generic_pm_domain *genpd; + + dev_dbg(dev, "%s()\n", __func__); + + genpd = dev_to_genpd(dev); + if (IS_ERR(genpd)) + return -EINVAL; + + return genpd->suspend_power_off ? 0 : genpd_freeze_late(genpd, dev); +} + +/** + * pm_genpd_freeze_noirq - Completion of freezing a device in an I/O PM domain. * @dev: Device to freeze. * * Carry out a late freeze of a device under the assumption that its @@ -949,7 +1008,6 @@ static int pm_genpd_freeze(struct device *dev) static int pm_genpd_freeze_noirq(struct device *dev) { struct generic_pm_domain *genpd; - int ret; dev_dbg(dev, "%s()\n", __func__); @@ -957,20 +1015,33 @@ static int pm_genpd_freeze_noirq(struct device *dev) if (IS_ERR(genpd)) return -EINVAL; - if (genpd->suspend_power_off) - return 0; + return genpd->suspend_power_off || dev_gpd_data(dev)->always_on ? + 0 : genpd_stop_dev(genpd, dev); +} - ret = genpd_freeze_late(genpd, dev); - if (ret) - return ret; +/** + * pm_genpd_thaw_noirq - Early thaw of device in an I/O PM domain. + * @dev: Device to thaw. + * + * Start the device, unless power has been removed from the domain already + * before the system transition. + */ +static int pm_genpd_thaw_noirq(struct device *dev) +{ + struct generic_pm_domain *genpd; - genpd_stop_dev(genpd, dev); + dev_dbg(dev, "%s()\n", __func__); - return 0; + genpd = dev_to_genpd(dev); + if (IS_ERR(genpd)) + return -EINVAL; + + return genpd->suspend_power_off || dev_gpd_data(dev)->always_on ? + 0 : genpd_start_dev(genpd, dev); } /** - * pm_genpd_thaw_noirq - Early thaw of a device from an I/O power domain. + * pm_genpd_thaw_early - Early thaw of device in an I/O PM domain. * @dev: Device to thaw. * * Carry out an early thaw of a device under the assumption that its @@ -978,7 +1049,7 @@ static int pm_genpd_freeze_noirq(struct device *dev) * struct generic_pm_domain representing a power domain consisting of I/O * devices. */ -static int pm_genpd_thaw_noirq(struct device *dev) +static int pm_genpd_thaw_early(struct device *dev) { struct generic_pm_domain *genpd; @@ -988,12 +1059,7 @@ static int pm_genpd_thaw_noirq(struct device *dev) if (IS_ERR(genpd)) return -EINVAL; - if (genpd->suspend_power_off) - return 0; - - genpd_start_dev(genpd, dev); - - return genpd_thaw_early(genpd, dev); + return genpd->suspend_power_off ? 0 : genpd_thaw_early(genpd, dev); } /** @@ -1018,13 +1084,11 @@ static int pm_genpd_thaw(struct device *dev) } /** - * pm_genpd_restore_noirq - Early restore of a device from an I/O power domain. + * pm_genpd_restore_noirq - Start of restore of device in an I/O PM domain. * @dev: Device to resume. * - * Carry out an early restore of a device under the assumption that its - * pm_domain field points to the domain member of an object of type - * struct generic_pm_domain representing a power domain consisting of I/O - * devices. + * Make sure the domain will be in the same power state as before the + * hibernation the system is resuming from and start the device if necessary. */ static int pm_genpd_restore_noirq(struct device *dev) { @@ -1040,23 +1104,35 @@ static int pm_genpd_restore_noirq(struct device *dev) * Since all of the "noirq" callbacks are executed sequentially, it is * guaranteed that this function will never run twice in parallel for * the same PM domain, so it is not necessary to use locking here. + * + * At this point suspended_count == 0 means we are being run for the + * first time for the given domain in the present cycle. */ - genpd->status = GPD_STATE_POWER_OFF; - if (genpd->suspend_power_off) { + if (genpd->suspended_count++ == 0) { /* - * The boot kernel might put the domain into the power on state, - * so make sure it really is powered off. + * The boot kernel might put the domain into arbitrary state, + * so make it appear as powered off to pm_genpd_poweron(), so + * that it tries to power it on in case it was really off. */ - if (genpd->power_off) - genpd->power_off(genpd); - return 0; + genpd->status = GPD_STATE_POWER_OFF; + if (genpd->suspend_power_off) { + /* + * If the domain was off before the hibernation, make + * sure it will be off going forward. + */ + if (genpd->power_off) + genpd->power_off(genpd); + + return 0; + } } + if (genpd->suspend_power_off) + return 0; + pm_genpd_poweron(genpd); - genpd->suspended_count--; - genpd_start_dev(genpd, dev); - return genpd_resume_early(genpd, dev); + return dev_gpd_data(dev)->always_on ? 0 : genpd_start_dev(genpd, dev); } /** @@ -1099,11 +1175,15 @@ static void pm_genpd_complete(struct device *dev) #define pm_genpd_prepare NULL #define pm_genpd_suspend NULL +#define pm_genpd_suspend_late NULL #define pm_genpd_suspend_noirq NULL +#define pm_genpd_resume_early NULL #define pm_genpd_resume_noirq NULL #define pm_genpd_resume NULL #define pm_genpd_freeze NULL +#define pm_genpd_freeze_late NULL #define pm_genpd_freeze_noirq NULL +#define pm_genpd_thaw_early NULL #define pm_genpd_thaw_noirq NULL #define pm_genpd_thaw NULL #define pm_genpd_restore_noirq NULL @@ -1171,6 +1251,38 @@ int __pm_genpd_add_device(struct generic_pm_domain *genpd, struct device *dev, } /** + * __pm_genpd_of_add_device - Add a device to an I/O PM domain. + * @genpd_node: Device tree node pointer representing a PM domain to which the + * the device is added to. + * @dev: Device to be added. + * @td: Set of PM QoS timing parameters to attach to the device. + */ +int __pm_genpd_of_add_device(struct device_node *genpd_node, struct device *dev, + struct gpd_timing_data *td) +{ + struct generic_pm_domain *genpd = NULL, *gpd; + + dev_dbg(dev, "%s()\n", __func__); + + if (IS_ERR_OR_NULL(genpd_node) || IS_ERR_OR_NULL(dev)) + return -EINVAL; + + mutex_lock(&gpd_list_lock); + list_for_each_entry(gpd, &gpd_list, gpd_list_node) { + if (gpd->of_node == genpd_node) { + genpd = gpd; + break; + } + } + mutex_unlock(&gpd_list_lock); + + if (!genpd) + return -EINVAL; + + return __pm_genpd_add_device(genpd, dev, td); +} + +/** * pm_genpd_remove_device - Remove a device from an I/O PM domain. * @genpd: PM domain to remove the device from. * @dev: Device to be removed. @@ -1216,6 +1328,26 @@ int pm_genpd_remove_device(struct generic_pm_domain *genpd, } /** + * pm_genpd_dev_always_on - Set/unset the "always on" flag for a given device. + * @dev: Device to set/unset the flag for. + * @val: The new value of the device's "always on" flag. + */ +void pm_genpd_dev_always_on(struct device *dev, bool val) +{ + struct pm_subsys_data *psd; + unsigned long flags; + + spin_lock_irqsave(&dev->power.lock, flags); + + psd = dev_to_psd(dev); + if (psd && psd->domain_data) + to_gpd_data(psd->domain_data)->always_on = val; + + spin_unlock_irqrestore(&dev->power.lock, flags); +} +EXPORT_SYMBOL_GPL(pm_genpd_dev_always_on); + +/** * pm_genpd_add_subdomain - Add a subdomain to an I/O PM domain. * @genpd: Master PM domain to add the subdomain to. * @subdomain: Subdomain to be added. @@ -1450,7 +1582,7 @@ static int pm_genpd_default_suspend_late(struct device *dev) { int (*cb)(struct device *__dev) = dev_gpd_data(dev)->ops.suspend_late; - return cb ? cb(dev) : pm_generic_suspend_noirq(dev); + return cb ? cb(dev) : pm_generic_suspend_late(dev); } /** @@ -1461,7 +1593,7 @@ static int pm_genpd_default_resume_early(struct device *dev) { int (*cb)(struct device *__dev) = dev_gpd_data(dev)->ops.resume_early; - return cb ? cb(dev) : pm_generic_resume_noirq(dev); + return cb ? cb(dev) : pm_generic_resume_early(dev); } /** @@ -1494,7 +1626,7 @@ static int pm_genpd_default_freeze_late(struct device *dev) { int (*cb)(struct device *__dev) = dev_gpd_data(dev)->ops.freeze_late; - return cb ? cb(dev) : pm_generic_freeze_noirq(dev); + return cb ? cb(dev) : pm_generic_freeze_late(dev); } /** @@ -1505,7 +1637,7 @@ static int pm_genpd_default_thaw_early(struct device *dev) { int (*cb)(struct device *__dev) = dev_gpd_data(dev)->ops.thaw_early; - return cb ? cb(dev) : pm_generic_thaw_noirq(dev); + return cb ? cb(dev) : pm_generic_thaw_early(dev); } /** @@ -1557,23 +1689,28 @@ void pm_genpd_init(struct generic_pm_domain *genpd, genpd->poweroff_task = NULL; genpd->resume_count = 0; genpd->device_count = 0; - genpd->suspended_count = 0; genpd->max_off_time_ns = -1; genpd->domain.ops.runtime_suspend = pm_genpd_runtime_suspend; genpd->domain.ops.runtime_resume = pm_genpd_runtime_resume; genpd->domain.ops.runtime_idle = pm_generic_runtime_idle; genpd->domain.ops.prepare = pm_genpd_prepare; genpd->domain.ops.suspend = pm_genpd_suspend; + genpd->domain.ops.suspend_late = pm_genpd_suspend_late; genpd->domain.ops.suspend_noirq = pm_genpd_suspend_noirq; genpd->domain.ops.resume_noirq = pm_genpd_resume_noirq; + genpd->domain.ops.resume_early = pm_genpd_resume_early; genpd->domain.ops.resume = pm_genpd_resume; genpd->domain.ops.freeze = pm_genpd_freeze; + genpd->domain.ops.freeze_late = pm_genpd_freeze_late; genpd->domain.ops.freeze_noirq = pm_genpd_freeze_noirq; genpd->domain.ops.thaw_noirq = pm_genpd_thaw_noirq; + genpd->domain.ops.thaw_early = pm_genpd_thaw_early; genpd->domain.ops.thaw = pm_genpd_thaw; genpd->domain.ops.poweroff = pm_genpd_suspend; + genpd->domain.ops.poweroff_late = pm_genpd_suspend_late; genpd->domain.ops.poweroff_noirq = pm_genpd_suspend_noirq; genpd->domain.ops.restore_noirq = pm_genpd_restore_noirq; + genpd->domain.ops.restore_early = pm_genpd_resume_early; genpd->domain.ops.restore = pm_genpd_resume; genpd->domain.ops.complete = pm_genpd_complete; genpd->dev_ops.save_state = pm_genpd_default_save_state; diff --git a/drivers/base/power/generic_ops.c b/drivers/base/power/generic_ops.c index 10bdd793f0bd..d03d290f31c2 100644 --- a/drivers/base/power/generic_ops.c +++ b/drivers/base/power/generic_ops.c @@ -92,59 +92,28 @@ int pm_generic_prepare(struct device *dev) } /** - * __pm_generic_call - Generic suspend/freeze/poweroff/thaw subsystem callback. - * @dev: Device to handle. - * @event: PM transition of the system under way. - * @bool: Whether or not this is the "noirq" stage. - * - * Execute the PM callback corresponding to @event provided by the driver of - * @dev, if defined, and return its error code. Return 0 if the callback is - * not present. + * pm_generic_suspend_noirq - Generic suspend_noirq callback for subsystems. + * @dev: Device to suspend. */ -static int __pm_generic_call(struct device *dev, int event, bool noirq) +int pm_generic_suspend_noirq(struct device *dev) { const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; - int (*callback)(struct device *); - - if (!pm) - return 0; - - switch (event) { - case PM_EVENT_SUSPEND: - callback = noirq ? pm->suspend_noirq : pm->suspend; - break; - case PM_EVENT_FREEZE: - callback = noirq ? pm->freeze_noirq : pm->freeze; - break; - case PM_EVENT_HIBERNATE: - callback = noirq ? pm->poweroff_noirq : pm->poweroff; - break; - case PM_EVENT_RESUME: - callback = noirq ? pm->resume_noirq : pm->resume; - break; - case PM_EVENT_THAW: - callback = noirq ? pm->thaw_noirq : pm->thaw; - break; - case PM_EVENT_RESTORE: - callback = noirq ? pm->restore_noirq : pm->restore; - break; - default: - callback = NULL; - break; - } - return callback ? callback(dev) : 0; + return pm && pm->suspend_noirq ? pm->suspend_noirq(dev) : 0; } +EXPORT_SYMBOL_GPL(pm_generic_suspend_noirq); /** - * pm_generic_suspend_noirq - Generic suspend_noirq callback for subsystems. + * pm_generic_suspend_late - Generic suspend_late callback for subsystems. * @dev: Device to suspend. */ -int pm_generic_suspend_noirq(struct device *dev) +int pm_generic_suspend_late(struct device *dev) { - return __pm_generic_call(dev, PM_EVENT_SUSPEND, true); + const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; + + return pm && pm->suspend_late ? pm->suspend_late(dev) : 0; } -EXPORT_SYMBOL_GPL(pm_generic_suspend_noirq); +EXPORT_SYMBOL_GPL(pm_generic_suspend_late); /** * pm_generic_suspend - Generic suspend callback for subsystems. @@ -152,7 +121,9 @@ EXPORT_SYMBOL_GPL(pm_generic_suspend_noirq); */ int pm_generic_suspend(struct device *dev) { - return __pm_generic_call(dev, PM_EVENT_SUSPEND, false); + const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; + + return pm && pm->suspend ? pm->suspend(dev) : 0; } EXPORT_SYMBOL_GPL(pm_generic_suspend); @@ -162,17 +133,33 @@ EXPORT_SYMBOL_GPL(pm_generic_suspend); */ int pm_generic_freeze_noirq(struct device *dev) { - return __pm_generic_call(dev, PM_EVENT_FREEZE, true); + const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; + + return pm && pm->freeze_noirq ? pm->freeze_noirq(dev) : 0; } EXPORT_SYMBOL_GPL(pm_generic_freeze_noirq); /** + * pm_generic_freeze_late - Generic freeze_late callback for subsystems. + * @dev: Device to freeze. + */ +int pm_generic_freeze_late(struct device *dev) +{ + const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; + + return pm && pm->freeze_late ? pm->freeze_late(dev) : 0; +} +EXPORT_SYMBOL_GPL(pm_generic_freeze_late); + +/** * pm_generic_freeze - Generic freeze callback for subsystems. * @dev: Device to freeze. */ int pm_generic_freeze(struct device *dev) { - return __pm_generic_call(dev, PM_EVENT_FREEZE, false); + const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; + + return pm && pm->freeze ? pm->freeze(dev) : 0; } EXPORT_SYMBOL_GPL(pm_generic_freeze); @@ -182,17 +169,33 @@ EXPORT_SYMBOL_GPL(pm_generic_freeze); */ int pm_generic_poweroff_noirq(struct device *dev) { - return __pm_generic_call(dev, PM_EVENT_HIBERNATE, true); + const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; + + return pm && pm->poweroff_noirq ? pm->poweroff_noirq(dev) : 0; } EXPORT_SYMBOL_GPL(pm_generic_poweroff_noirq); /** + * pm_generic_poweroff_late - Generic poweroff_late callback for subsystems. + * @dev: Device to handle. + */ +int pm_generic_poweroff_late(struct device *dev) +{ + const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; + + return pm && pm->poweroff_late ? pm->poweroff_late(dev) : 0; +} +EXPORT_SYMBOL_GPL(pm_generic_poweroff_late); + +/** * pm_generic_poweroff - Generic poweroff callback for subsystems. * @dev: Device to handle. */ int pm_generic_poweroff(struct device *dev) { - return __pm_generic_call(dev, PM_EVENT_HIBERNATE, false); + const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; + + return pm && pm->poweroff ? pm->poweroff(dev) : 0; } EXPORT_SYMBOL_GPL(pm_generic_poweroff); @@ -202,17 +205,33 @@ EXPORT_SYMBOL_GPL(pm_generic_poweroff); */ int pm_generic_thaw_noirq(struct device *dev) { - return __pm_generic_call(dev, PM_EVENT_THAW, true); + const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; + + return pm && pm->thaw_noirq ? pm->thaw_noirq(dev) : 0; } EXPORT_SYMBOL_GPL(pm_generic_thaw_noirq); /** + * pm_generic_thaw_early - Generic thaw_early callback for subsystems. + * @dev: Device to thaw. + */ +int pm_generic_thaw_early(struct device *dev) +{ + const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; + + return pm && pm->thaw_early ? pm->thaw_early(dev) : 0; +} +EXPORT_SYMBOL_GPL(pm_generic_thaw_early); + +/** * pm_generic_thaw - Generic thaw callback for subsystems. * @dev: Device to thaw. */ int pm_generic_thaw(struct device *dev) { - return __pm_generic_call(dev, PM_EVENT_THAW, false); + const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; + + return pm && pm->thaw ? pm->thaw(dev) : 0; } EXPORT_SYMBOL_GPL(pm_generic_thaw); @@ -222,17 +241,33 @@ EXPORT_SYMBOL_GPL(pm_generic_thaw); */ int pm_generic_resume_noirq(struct device *dev) { - return __pm_generic_call(dev, PM_EVENT_RESUME, true); + const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; + + return pm && pm->resume_noirq ? pm->resume_noirq(dev) : 0; } EXPORT_SYMBOL_GPL(pm_generic_resume_noirq); /** + * pm_generic_resume_early - Generic resume_early callback for subsystems. + * @dev: Device to resume. + */ +int pm_generic_resume_early(struct device *dev) +{ + const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; + + return pm && pm->resume_early ? pm->resume_early(dev) : 0; +} +EXPORT_SYMBOL_GPL(pm_generic_resume_early); + +/** * pm_generic_resume - Generic resume callback for subsystems. * @dev: Device to resume. */ int pm_generic_resume(struct device *dev) { - return __pm_generic_call(dev, PM_EVENT_RESUME, false); + const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; + + return pm && pm->resume ? pm->resume(dev) : 0; } EXPORT_SYMBOL_GPL(pm_generic_resume); @@ -242,17 +277,33 @@ EXPORT_SYMBOL_GPL(pm_generic_resume); */ int pm_generic_restore_noirq(struct device *dev) { - return __pm_generic_call(dev, PM_EVENT_RESTORE, true); + const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; + + return pm && pm->restore_noirq ? pm->restore_noirq(dev) : 0; } EXPORT_SYMBOL_GPL(pm_generic_restore_noirq); /** + * pm_generic_restore_early - Generic restore_early callback for subsystems. + * @dev: Device to resume. + */ +int pm_generic_restore_early(struct device *dev) +{ + const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; + + return pm && pm->restore_early ? pm->restore_early(dev) : 0; +} +EXPORT_SYMBOL_GPL(pm_generic_restore_early); + +/** * pm_generic_restore - Generic restore callback for subsystems. * @dev: Device to restore. */ int pm_generic_restore(struct device *dev) { - return __pm_generic_call(dev, PM_EVENT_RESTORE, false); + const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; + + return pm && pm->restore ? pm->restore(dev) : 0; } EXPORT_SYMBOL_GPL(pm_generic_restore); diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c index e2cc3d2e0ecc..b462c0e341cb 100644 --- a/drivers/base/power/main.c +++ b/drivers/base/power/main.c @@ -47,6 +47,7 @@ typedef int (*pm_callback_t)(struct device *); LIST_HEAD(dpm_list); LIST_HEAD(dpm_prepared_list); LIST_HEAD(dpm_suspended_list); +LIST_HEAD(dpm_late_early_list); LIST_HEAD(dpm_noirq_list); struct suspend_stats suspend_stats; @@ -246,6 +247,40 @@ static pm_callback_t pm_op(const struct dev_pm_ops *ops, pm_message_t state) } /** + * pm_late_early_op - Return the PM operation appropriate for given PM event. + * @ops: PM operations to choose from. + * @state: PM transition of the system being carried out. + * + * Runtime PM is disabled for @dev while this function is being executed. + */ +static pm_callback_t pm_late_early_op(const struct dev_pm_ops *ops, + pm_message_t state) +{ + switch (state.event) { +#ifdef CONFIG_SUSPEND + case PM_EVENT_SUSPEND: + return ops->suspend_late; + case PM_EVENT_RESUME: + return ops->resume_early; +#endif /* CONFIG_SUSPEND */ +#ifdef CONFIG_HIBERNATE_CALLBACKS + case PM_EVENT_FREEZE: + case PM_EVENT_QUIESCE: + return ops->freeze_late; + case PM_EVENT_HIBERNATE: + return ops->poweroff_late; + case PM_EVENT_THAW: + case PM_EVENT_RECOVER: + return ops->thaw_early; + case PM_EVENT_RESTORE: + return ops->restore_early; +#endif /* CONFIG_HIBERNATE_CALLBACKS */ + } + + return NULL; +} + +/** * pm_noirq_op - Return the PM operation appropriate for given PM event. * @ops: PM operations to choose from. * @state: PM transition of the system being carried out. @@ -374,21 +409,21 @@ static int device_resume_noirq(struct device *dev, pm_message_t state) TRACE_RESUME(0); if (dev->pm_domain) { - info = "EARLY power domain "; + info = "noirq power domain "; callback = pm_noirq_op(&dev->pm_domain->ops, state); } else if (dev->type && dev->type->pm) { - info = "EARLY type "; + info = "noirq type "; callback = pm_noirq_op(dev->type->pm, state); } else if (dev->class && dev->class->pm) { - info = "EARLY class "; + info = "noirq class "; callback = pm_noirq_op(dev->class->pm, state); } else if (dev->bus && dev->bus->pm) { - info = "EARLY bus "; + info = "noirq bus "; callback = pm_noirq_op(dev->bus->pm, state); } if (!callback && dev->driver && dev->driver->pm) { - info = "EARLY driver "; + info = "noirq driver "; callback = pm_noirq_op(dev->driver->pm, state); } @@ -399,13 +434,13 @@ static int device_resume_noirq(struct device *dev, pm_message_t state) } /** - * dpm_resume_noirq - Execute "early resume" callbacks for non-sysdev devices. + * dpm_resume_noirq - Execute "noirq resume" callbacks for all devices. * @state: PM transition of the system being carried out. * - * Call the "noirq" resume handlers for all devices marked as DPM_OFF_IRQ and + * Call the "noirq" resume handlers for all devices in dpm_noirq_list and * enable device drivers to receive interrupts. */ -void dpm_resume_noirq(pm_message_t state) +static void dpm_resume_noirq(pm_message_t state) { ktime_t starttime = ktime_get(); @@ -415,7 +450,7 @@ void dpm_resume_noirq(pm_message_t state) int error; get_device(dev); - list_move_tail(&dev->power.entry, &dpm_suspended_list); + list_move_tail(&dev->power.entry, &dpm_late_early_list); mutex_unlock(&dpm_list_mtx); error = device_resume_noirq(dev, state); @@ -423,6 +458,80 @@ void dpm_resume_noirq(pm_message_t state) suspend_stats.failed_resume_noirq++; dpm_save_failed_step(SUSPEND_RESUME_NOIRQ); dpm_save_failed_dev(dev_name(dev)); + pm_dev_err(dev, state, " noirq", error); + } + + mutex_lock(&dpm_list_mtx); + put_device(dev); + } + mutex_unlock(&dpm_list_mtx); + dpm_show_time(starttime, state, "noirq"); + resume_device_irqs(); +} + +/** + * device_resume_early - Execute an "early resume" callback for given device. + * @dev: Device to handle. + * @state: PM transition of the system being carried out. + * + * Runtime PM is disabled for @dev while this function is being executed. + */ +static int device_resume_early(struct device *dev, pm_message_t state) +{ + pm_callback_t callback = NULL; + char *info = NULL; + int error = 0; + + TRACE_DEVICE(dev); + TRACE_RESUME(0); + + if (dev->pm_domain) { + info = "early power domain "; + callback = pm_late_early_op(&dev->pm_domain->ops, state); + } else if (dev->type && dev->type->pm) { + info = "early type "; + callback = pm_late_early_op(dev->type->pm, state); + } else if (dev->class && dev->class->pm) { + info = "early class "; + callback = pm_late_early_op(dev->class->pm, state); + } else if (dev->bus && dev->bus->pm) { + info = "early bus "; + callback = pm_late_early_op(dev->bus->pm, state); + } + + if (!callback && dev->driver && dev->driver->pm) { + info = "early driver "; + callback = pm_late_early_op(dev->driver->pm, state); + } + + error = dpm_run_callback(callback, dev, state, info); + + TRACE_RESUME(error); + return error; +} + +/** + * dpm_resume_early - Execute "early resume" callbacks for all devices. + * @state: PM transition of the system being carried out. + */ +static void dpm_resume_early(pm_message_t state) +{ + ktime_t starttime = ktime_get(); + + mutex_lock(&dpm_list_mtx); + while (!list_empty(&dpm_late_early_list)) { + struct device *dev = to_device(dpm_late_early_list.next); + int error; + + get_device(dev); + list_move_tail(&dev->power.entry, &dpm_suspended_list); + mutex_unlock(&dpm_list_mtx); + + error = device_resume_early(dev, state); + if (error) { + suspend_stats.failed_resume_early++; + dpm_save_failed_step(SUSPEND_RESUME_EARLY); + dpm_save_failed_dev(dev_name(dev)); pm_dev_err(dev, state, " early", error); } @@ -431,9 +540,18 @@ void dpm_resume_noirq(pm_message_t state) } mutex_unlock(&dpm_list_mtx); dpm_show_time(starttime, state, "early"); - resume_device_irqs(); } -EXPORT_SYMBOL_GPL(dpm_resume_noirq); + +/** + * dpm_resume_start - Execute "noirq" and "early" device callbacks. + * @state: PM transition of the system being carried out. + */ +void dpm_resume_start(pm_message_t state) +{ + dpm_resume_noirq(state); + dpm_resume_early(state); +} +EXPORT_SYMBOL_GPL(dpm_resume_start); /** * device_resume - Execute "resume" callbacks for given device. @@ -716,21 +834,21 @@ static int device_suspend_noirq(struct device *dev, pm_message_t state) char *info = NULL; if (dev->pm_domain) { - info = "LATE power domain "; + info = "noirq power domain "; callback = pm_noirq_op(&dev->pm_domain->ops, state); } else if (dev->type && dev->type->pm) { - info = "LATE type "; + info = "noirq type "; callback = pm_noirq_op(dev->type->pm, state); } else if (dev->class && dev->class->pm) { - info = "LATE class "; + info = "noirq class "; callback = pm_noirq_op(dev->class->pm, state); } else if (dev->bus && dev->bus->pm) { - info = "LATE bus "; + info = "noirq bus "; callback = pm_noirq_op(dev->bus->pm, state); } if (!callback && dev->driver && dev->driver->pm) { - info = "LATE driver "; + info = "noirq driver "; callback = pm_noirq_op(dev->driver->pm, state); } @@ -738,21 +856,21 @@ static int device_suspend_noirq(struct device *dev, pm_message_t state) } /** - * dpm_suspend_noirq - Execute "late suspend" callbacks for non-sysdev devices. + * dpm_suspend_noirq - Execute "noirq suspend" callbacks for all devices. * @state: PM transition of the system being carried out. * * Prevent device drivers from receiving interrupts and call the "noirq" suspend * handlers for all non-sysdev devices. */ -int dpm_suspend_noirq(pm_message_t state) +static int dpm_suspend_noirq(pm_message_t state) { ktime_t starttime = ktime_get(); int error = 0; suspend_device_irqs(); mutex_lock(&dpm_list_mtx); - while (!list_empty(&dpm_suspended_list)) { - struct device *dev = to_device(dpm_suspended_list.prev); + while (!list_empty(&dpm_late_early_list)) { + struct device *dev = to_device(dpm_late_early_list.prev); get_device(dev); mutex_unlock(&dpm_list_mtx); @@ -761,7 +879,7 @@ int dpm_suspend_noirq(pm_message_t state) mutex_lock(&dpm_list_mtx); if (error) { - pm_dev_err(dev, state, " late", error); + pm_dev_err(dev, state, " noirq", error); suspend_stats.failed_suspend_noirq++; dpm_save_failed_step(SUSPEND_SUSPEND_NOIRQ); dpm_save_failed_dev(dev_name(dev)); @@ -776,10 +894,95 @@ int dpm_suspend_noirq(pm_message_t state) if (error) dpm_resume_noirq(resume_event(state)); else + dpm_show_time(starttime, state, "noirq"); + return error; +} + +/** + * device_suspend_late - Execute a "late suspend" callback for given device. + * @dev: Device to handle. + * @state: PM transition of the system being carried out. + * + * Runtime PM is disabled for @dev while this function is being executed. + */ +static int device_suspend_late(struct device *dev, pm_message_t state) +{ + pm_callback_t callback = NULL; + char *info = NULL; + + if (dev->pm_domain) { + info = "late power domain "; + callback = pm_late_early_op(&dev->pm_domain->ops, state); + } else if (dev->type && dev->type->pm) { + info = "late type "; + callback = pm_late_early_op(dev->type->pm, state); + } else if (dev->class && dev->class->pm) { + info = "late class "; + callback = pm_late_early_op(dev->class->pm, state); + } else if (dev->bus && dev->bus->pm) { + info = "late bus "; + callback = pm_late_early_op(dev->bus->pm, state); + } + + if (!callback && dev->driver && dev->driver->pm) { + info = "late driver "; + callback = pm_late_early_op(dev->driver->pm, state); + } + + return dpm_run_callback(callback, dev, state, info); +} + +/** + * dpm_suspend_late - Execute "late suspend" callbacks for all devices. + * @state: PM transition of the system being carried out. + */ +static int dpm_suspend_late(pm_message_t state) +{ + ktime_t starttime = ktime_get(); + int error = 0; + + mutex_lock(&dpm_list_mtx); + while (!list_empty(&dpm_suspended_list)) { + struct device *dev = to_device(dpm_suspended_list.prev); + + get_device(dev); + mutex_unlock(&dpm_list_mtx); + + error = device_suspend_late(dev, state); + + mutex_lock(&dpm_list_mtx); + if (error) { + pm_dev_err(dev, state, " late", error); + suspend_stats.failed_suspend_late++; + dpm_save_failed_step(SUSPEND_SUSPEND_LATE); + dpm_save_failed_dev(dev_name(dev)); + put_device(dev); + break; + } + if (!list_empty(&dev->power.entry)) + list_move(&dev->power.entry, &dpm_late_early_list); + put_device(dev); + } + mutex_unlock(&dpm_list_mtx); + if (error) + dpm_resume_early(resume_event(state)); + else dpm_show_time(starttime, state, "late"); + return error; } -EXPORT_SYMBOL_GPL(dpm_suspend_noirq); + +/** + * dpm_suspend_end - Execute "late" and "noirq" device suspend callbacks. + * @state: PM transition of the system being carried out. + */ +int dpm_suspend_end(pm_message_t state) +{ + int error = dpm_suspend_late(state); + + return error ? : dpm_suspend_noirq(state); +} +EXPORT_SYMBOL_GPL(dpm_suspend_end); /** * legacy_suspend - Execute a legacy (bus or class) suspend callback for device. diff --git a/drivers/base/power/power.h b/drivers/base/power/power.h index 9bf62323aaf3..eeb4bff9505c 100644 --- a/drivers/base/power/power.h +++ b/drivers/base/power/power.h @@ -71,6 +71,8 @@ extern void dpm_sysfs_remove(struct device *dev); extern void rpm_sysfs_remove(struct device *dev); extern int wakeup_sysfs_add(struct device *dev); extern void wakeup_sysfs_remove(struct device *dev); +extern int pm_qos_sysfs_add(struct device *dev); +extern void pm_qos_sysfs_remove(struct device *dev); #else /* CONFIG_PM */ @@ -79,5 +81,7 @@ static inline void dpm_sysfs_remove(struct device *dev) {} static inline void rpm_sysfs_remove(struct device *dev) {} static inline int wakeup_sysfs_add(struct device *dev) { return 0; } static inline void wakeup_sysfs_remove(struct device *dev) {} +static inline int pm_qos_sysfs_add(struct device *dev) { return 0; } +static inline void pm_qos_sysfs_remove(struct device *dev) {} #endif diff --git a/drivers/base/power/qos.c b/drivers/base/power/qos.c index c5d358837461..71855570922d 100644 --- a/drivers/base/power/qos.c +++ b/drivers/base/power/qos.c @@ -41,6 +41,7 @@ #include <linux/mutex.h> #include <linux/export.h> +#include "power.h" static DEFINE_MUTEX(dev_pm_qos_mtx); @@ -166,6 +167,12 @@ void dev_pm_qos_constraints_destroy(struct device *dev) struct dev_pm_qos_request *req, *tmp; struct pm_qos_constraints *c; + /* + * If the device's PM QoS resume latency limit has been exposed to user + * space, it has to be hidden at this point. + */ + dev_pm_qos_hide_latency_limit(dev); + mutex_lock(&dev_pm_qos_mtx); dev->power.power_state = PMSG_INVALID; @@ -445,3 +452,57 @@ int dev_pm_qos_add_ancestor_request(struct device *dev, return error; } EXPORT_SYMBOL_GPL(dev_pm_qos_add_ancestor_request); + +#ifdef CONFIG_PM_RUNTIME +static void __dev_pm_qos_drop_user_request(struct device *dev) +{ + dev_pm_qos_remove_request(dev->power.pq_req); + dev->power.pq_req = 0; +} + +/** + * dev_pm_qos_expose_latency_limit - Expose PM QoS latency limit to user space. + * @dev: Device whose PM QoS latency limit is to be exposed to user space. + * @value: Initial value of the latency limit. + */ +int dev_pm_qos_expose_latency_limit(struct device *dev, s32 value) +{ + struct dev_pm_qos_request *req; + int ret; + + if (!device_is_registered(dev) || value < 0) + return -EINVAL; + + if (dev->power.pq_req) + return -EEXIST; + + req = kzalloc(sizeof(*req), GFP_KERNEL); + if (!req) + return -ENOMEM; + + ret = dev_pm_qos_add_request(dev, req, value); + if (ret < 0) + return ret; + + dev->power.pq_req = req; + ret = pm_qos_sysfs_add(dev); + if (ret) + __dev_pm_qos_drop_user_request(dev); + + return ret; +} +EXPORT_SYMBOL_GPL(dev_pm_qos_expose_latency_limit); + +/** + * dev_pm_qos_hide_latency_limit - Hide PM QoS latency limit from user space. + * @dev: Device whose PM QoS latency limit is to be hidden from user space. + */ +void dev_pm_qos_hide_latency_limit(struct device *dev) +{ + if (dev->power.pq_req) { + pm_qos_sysfs_remove(dev); + __dev_pm_qos_drop_user_request(dev); + } +} +EXPORT_SYMBOL_GPL(dev_pm_qos_hide_latency_limit); +#endif /* CONFIG_PM_RUNTIME */ diff --git a/drivers/base/power/sysfs.c b/drivers/base/power/sysfs.c index adf41be0ea66..95c12f6cb5b9 100644 --- a/drivers/base/power/sysfs.c +++ b/drivers/base/power/sysfs.c @@ -5,6 +5,7 @@ #include <linux/device.h> #include <linux/string.h> #include <linux/export.h> +#include <linux/pm_qos.h> #include <linux/pm_runtime.h> #include <linux/atomic.h> #include <linux/jiffies.h> @@ -217,6 +218,31 @@ static ssize_t autosuspend_delay_ms_store(struct device *dev, static DEVICE_ATTR(autosuspend_delay_ms, 0644, autosuspend_delay_ms_show, autosuspend_delay_ms_store); +static ssize_t pm_qos_latency_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + return sprintf(buf, "%d\n", dev->power.pq_req->node.prio); +} + +static ssize_t pm_qos_latency_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t n) +{ + s32 value; + int ret; + + if (kstrtos32(buf, 0, &value)) + return -EINVAL; + + if (value < 0) + return -EINVAL; + + ret = dev_pm_qos_update_request(dev->power.pq_req, value); + return ret < 0 ? ret : n; +} + +static DEVICE_ATTR(pm_qos_resume_latency_us, 0644, + pm_qos_latency_show, pm_qos_latency_store); #endif /* CONFIG_PM_RUNTIME */ #ifdef CONFIG_PM_SLEEP @@ -490,6 +516,17 @@ static struct attribute_group pm_runtime_attr_group = { .attrs = runtime_attrs, }; +static struct attribute *pm_qos_attrs[] = { +#ifdef CONFIG_PM_RUNTIME + &dev_attr_pm_qos_resume_latency_us.attr, +#endif /* CONFIG_PM_RUNTIME */ + NULL, +}; +static struct attribute_group pm_qos_attr_group = { + .name = power_group_name, + .attrs = pm_qos_attrs, +}; + int dpm_sysfs_add(struct device *dev) { int rc; @@ -530,6 +567,16 @@ void wakeup_sysfs_remove(struct device *dev) sysfs_unmerge_group(&dev->kobj, &pm_wakeup_attr_group); } +int pm_qos_sysfs_add(struct device *dev) +{ + return sysfs_merge_group(&dev->kobj, &pm_qos_attr_group); +} + +void pm_qos_sysfs_remove(struct device *dev) +{ + sysfs_unmerge_group(&dev->kobj, &pm_qos_attr_group); +} + void rpm_sysfs_remove(struct device *dev) { sysfs_unmerge_group(&dev->kobj, &pm_runtime_attr_group); diff --git a/drivers/base/power/wakeup.c b/drivers/base/power/wakeup.c index caf995fb774b..2a3e581b8dcd 100644 --- a/drivers/base/power/wakeup.c +++ b/drivers/base/power/wakeup.c @@ -53,6 +53,23 @@ static void pm_wakeup_timer_fn(unsigned long data); static LIST_HEAD(wakeup_sources); /** + * wakeup_source_prepare - Prepare a new wakeup source for initialization. + * @ws: Wakeup source to prepare. + * @name: Pointer to the name of the new wakeup source. + * + * Callers must ensure that the @name string won't be freed when @ws is still in + * use. + */ +void wakeup_source_prepare(struct wakeup_source *ws, const char *name) +{ + if (ws) { + memset(ws, 0, sizeof(*ws)); + ws->name = name; + } +} +EXPORT_SYMBOL_GPL(wakeup_source_prepare); + +/** * wakeup_source_create - Create a struct wakeup_source object. * @name: Name of the new wakeup source. */ @@ -60,37 +77,44 @@ struct wakeup_source *wakeup_source_create(const char *name) { struct wakeup_source *ws; - ws = kzalloc(sizeof(*ws), GFP_KERNEL); + ws = kmalloc(sizeof(*ws), GFP_KERNEL); if (!ws) return NULL; - spin_lock_init(&ws->lock); - if (name) - ws->name = kstrdup(name, GFP_KERNEL); - + wakeup_source_prepare(ws, name ? kstrdup(name, GFP_KERNEL) : NULL); return ws; } EXPORT_SYMBOL_GPL(wakeup_source_create); /** + * wakeup_source_drop - Prepare a struct wakeup_source object for destruction. + * @ws: Wakeup source to prepare for destruction. + * + * Callers must ensure that __pm_stay_awake() or __pm_wakeup_event() will never + * be run in parallel with this function for the same wakeup source object. + */ +void wakeup_source_drop(struct wakeup_source *ws) +{ + if (!ws) + return; + + del_timer_sync(&ws->timer); + __pm_relax(ws); +} +EXPORT_SYMBOL_GPL(wakeup_source_drop); + +/** * wakeup_source_destroy - Destroy a struct wakeup_source object. * @ws: Wakeup source to destroy. + * + * Use only for wakeup source objects created with wakeup_source_create(). */ void wakeup_source_destroy(struct wakeup_source *ws) { if (!ws) return; - spin_lock_irq(&ws->lock); - while (ws->active) { - spin_unlock_irq(&ws->lock); - - schedule_timeout_interruptible(msecs_to_jiffies(TIMEOUT)); - - spin_lock_irq(&ws->lock); - } - spin_unlock_irq(&ws->lock); - + wakeup_source_drop(ws); kfree(ws->name); kfree(ws); } @@ -105,6 +129,7 @@ void wakeup_source_add(struct wakeup_source *ws) if (WARN_ON(!ws)) return; + spin_lock_init(&ws->lock); setup_timer(&ws->timer, pm_wakeup_timer_fn, (unsigned long)ws); ws->active = false; @@ -152,8 +177,10 @@ EXPORT_SYMBOL_GPL(wakeup_source_register); */ void wakeup_source_unregister(struct wakeup_source *ws) { - wakeup_source_remove(ws); - wakeup_source_destroy(ws); + if (ws) { + wakeup_source_remove(ws); + wakeup_source_destroy(ws); + } } EXPORT_SYMBOL_GPL(wakeup_source_unregister); @@ -349,7 +376,6 @@ static void wakeup_source_activate(struct wakeup_source *ws) { ws->active = true; ws->active_count++; - ws->timer_expires = jiffies; ws->last_time = ktime_get(); /* Increment the counter of events in progress. */ @@ -370,9 +396,14 @@ void __pm_stay_awake(struct wakeup_source *ws) return; spin_lock_irqsave(&ws->lock, flags); + ws->event_count++; if (!ws->active) wakeup_source_activate(ws); + + del_timer(&ws->timer); + ws->timer_expires = 0; + spin_unlock_irqrestore(&ws->lock, flags); } EXPORT_SYMBOL_GPL(__pm_stay_awake); @@ -438,6 +469,7 @@ static void wakeup_source_deactivate(struct wakeup_source *ws) ws->max_time = duration; del_timer(&ws->timer); + ws->timer_expires = 0; /* * Increment the counter of registered wakeup events and decrement the @@ -492,11 +524,22 @@ EXPORT_SYMBOL_GPL(pm_relax); * pm_wakeup_timer_fn - Delayed finalization of a wakeup event. * @data: Address of the wakeup source object associated with the event source. * - * Call __pm_relax() for the wakeup source whose address is stored in @data. + * Call wakeup_source_deactivate() for the wakeup source whose address is stored + * in @data if it is currently active and its timer has not been canceled and + * the expiration time of the timer is not in future. */ static void pm_wakeup_timer_fn(unsigned long data) { - __pm_relax((struct wakeup_source *)data); + struct wakeup_source *ws = (struct wakeup_source *)data; + unsigned long flags; + + spin_lock_irqsave(&ws->lock, flags); + + if (ws->active && ws->timer_expires + && time_after_eq(jiffies, ws->timer_expires)) + wakeup_source_deactivate(ws); + + spin_unlock_irqrestore(&ws->lock, flags); } /** @@ -534,7 +577,7 @@ void __pm_wakeup_event(struct wakeup_source *ws, unsigned int msec) if (!expires) expires = 1; - if (time_after(expires, ws->timer_expires)) { + if (!ws->timer_expires || time_after(expires, ws->timer_expires)) { mod_timer(&ws->timer, expires); ws->timer_expires = expires; } diff --git a/drivers/clocksource/sh_cmt.c b/drivers/clocksource/sh_cmt.c index ca09bc421ddb..32fe9ef5cc5c 100644 --- a/drivers/clocksource/sh_cmt.c +++ b/drivers/clocksource/sh_cmt.c @@ -32,6 +32,7 @@ #include <linux/sh_timer.h> #include <linux/slab.h> #include <linux/module.h> +#include <linux/pm_domain.h> struct sh_cmt_priv { void __iomem *mapbase; @@ -689,6 +690,9 @@ static int __devinit sh_cmt_probe(struct platform_device *pdev) struct sh_cmt_priv *p = platform_get_drvdata(pdev); int ret; + if (!is_early_platform_device(pdev)) + pm_genpd_dev_always_on(&pdev->dev, true); + if (p) { dev_info(&pdev->dev, "kept as earlytimer\n"); return 0; diff --git a/drivers/clocksource/sh_mtu2.c b/drivers/clocksource/sh_mtu2.c index db8d5955bad4..a2172f690418 100644 --- a/drivers/clocksource/sh_mtu2.c +++ b/drivers/clocksource/sh_mtu2.c @@ -31,6 +31,7 @@ #include <linux/sh_timer.h> #include <linux/slab.h> #include <linux/module.h> +#include <linux/pm_domain.h> struct sh_mtu2_priv { void __iomem *mapbase; @@ -306,6 +307,9 @@ static int __devinit sh_mtu2_probe(struct platform_device *pdev) struct sh_mtu2_priv *p = platform_get_drvdata(pdev); int ret; + if (!is_early_platform_device(pdev)) + pm_genpd_dev_always_on(&pdev->dev, true); + if (p) { dev_info(&pdev->dev, "kept as earlytimer\n"); return 0; diff --git a/drivers/clocksource/sh_tmu.c b/drivers/clocksource/sh_tmu.c index 079e96ad44e8..97f54b634be4 100644 --- a/drivers/clocksource/sh_tmu.c +++ b/drivers/clocksource/sh_tmu.c @@ -32,6 +32,7 @@ #include <linux/sh_timer.h> #include <linux/slab.h> #include <linux/module.h> +#include <linux/pm_domain.h> struct sh_tmu_priv { void __iomem *mapbase; @@ -410,6 +411,9 @@ static int __devinit sh_tmu_probe(struct platform_device *pdev) struct sh_tmu_priv *p = platform_get_drvdata(pdev); int ret; + if (!is_early_platform_device(pdev)) + pm_genpd_dev_always_on(&pdev->dev, true); + if (p) { dev_info(&pdev->dev, "kept as earlytimer\n"); return 0; diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c index c189b82f5ece..70c31d43fff3 100644 --- a/drivers/devfreq/devfreq.c +++ b/drivers/devfreq/devfreq.c @@ -83,6 +83,7 @@ int update_devfreq(struct devfreq *devfreq) { unsigned long freq; int err = 0; + u32 flags = 0; if (!mutex_is_locked(&devfreq->lock)) { WARN(true, "devfreq->lock must be locked by the caller.\n"); @@ -94,7 +95,24 @@ int update_devfreq(struct devfreq *devfreq) if (err) return err; - err = devfreq->profile->target(devfreq->dev.parent, &freq); + /* + * Adjust the freuqency with user freq and QoS. + * + * List from the highest proiority + * max_freq (probably called by thermal when it's too hot) + * min_freq + */ + + if (devfreq->min_freq && freq < devfreq->min_freq) { + freq = devfreq->min_freq; + flags &= ~DEVFREQ_FLAG_LEAST_UPPER_BOUND; /* Use GLB */ + } + if (devfreq->max_freq && freq > devfreq->max_freq) { + freq = devfreq->max_freq; + flags |= DEVFREQ_FLAG_LEAST_UPPER_BOUND; /* Use LUB */ + } + + err = devfreq->profile->target(devfreq->dev.parent, &freq, flags); if (err) return err; @@ -501,12 +519,82 @@ static ssize_t show_central_polling(struct device *dev, !to_devfreq(dev)->governor->no_central_polling); } +static ssize_t store_min_freq(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct devfreq *df = to_devfreq(dev); + unsigned long value; + int ret; + unsigned long max; + + ret = sscanf(buf, "%lu", &value); + if (ret != 1) + goto out; + + mutex_lock(&df->lock); + max = df->max_freq; + if (value && max && value > max) { + ret = -EINVAL; + goto unlock; + } + + df->min_freq = value; + update_devfreq(df); + ret = count; +unlock: + mutex_unlock(&df->lock); +out: + return ret; +} + +static ssize_t show_min_freq(struct device *dev, struct device_attribute *attr, + char *buf) +{ + return sprintf(buf, "%lu\n", to_devfreq(dev)->min_freq); +} + +static ssize_t store_max_freq(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct devfreq *df = to_devfreq(dev); + unsigned long value; + int ret; + unsigned long min; + + ret = sscanf(buf, "%lu", &value); + if (ret != 1) + goto out; + + mutex_lock(&df->lock); + min = df->min_freq; + if (value && min && value < min) { + ret = -EINVAL; + goto unlock; + } + + df->max_freq = value; + update_devfreq(df); + ret = count; +unlock: + mutex_unlock(&df->lock); +out: + return ret; +} + +static ssize_t show_max_freq(struct device *dev, struct device_attribute *attr, + char *buf) +{ + return sprintf(buf, "%lu\n", to_devfreq(dev)->max_freq); +} + static struct device_attribute devfreq_attrs[] = { __ATTR(governor, S_IRUGO, show_governor, NULL), __ATTR(cur_freq, S_IRUGO, show_freq, NULL), __ATTR(central_polling, S_IRUGO, show_central_polling, NULL), __ATTR(polling_interval, S_IRUGO | S_IWUSR, show_polling_interval, store_polling_interval), + __ATTR(min_freq, S_IRUGO | S_IWUSR, show_min_freq, store_min_freq), + __ATTR(max_freq, S_IRUGO | S_IWUSR, show_max_freq, store_max_freq), { }, }; @@ -555,14 +643,30 @@ module_exit(devfreq_exit); * freq value given to target callback. * @dev The devfreq user device. (parent of devfreq) * @freq The frequency given to target function + * @flags Flags handed from devfreq framework. * */ -struct opp *devfreq_recommended_opp(struct device *dev, unsigned long *freq) +struct opp *devfreq_recommended_opp(struct device *dev, unsigned long *freq, + u32 flags) { - struct opp *opp = opp_find_freq_ceil(dev, freq); + struct opp *opp; - if (opp == ERR_PTR(-ENODEV)) + if (flags & DEVFREQ_FLAG_LEAST_UPPER_BOUND) { + /* The freq is an upper bound. opp should be lower */ opp = opp_find_freq_floor(dev, freq); + + /* If not available, use the closest opp */ + if (opp == ERR_PTR(-ENODEV)) + opp = opp_find_freq_ceil(dev, freq); + } else { + /* The freq is an lower bound. opp should be higher */ + opp = opp_find_freq_ceil(dev, freq); + + /* If not available, use the closest opp */ + if (opp == ERR_PTR(-ENODEV)) + opp = opp_find_freq_floor(dev, freq); + } + return opp; } diff --git a/drivers/devfreq/exynos4_bus.c b/drivers/devfreq/exynos4_bus.c index 6460577d6701..1a361e99965a 100644 --- a/drivers/devfreq/exynos4_bus.c +++ b/drivers/devfreq/exynos4_bus.c @@ -619,15 +619,19 @@ static int exynos4_bus_setvolt(struct busfreq_data *data, struct opp *opp, return err; } -static int exynos4_bus_target(struct device *dev, unsigned long *_freq) +static int exynos4_bus_target(struct device *dev, unsigned long *_freq, + u32 flags) { int err = 0; struct platform_device *pdev = container_of(dev, struct platform_device, dev); struct busfreq_data *data = platform_get_drvdata(pdev); - struct opp *opp = devfreq_recommended_opp(dev, _freq); - unsigned long old_freq = opp_get_freq(data->curr_opp); + struct opp *opp = devfreq_recommended_opp(dev, _freq, flags); unsigned long freq = opp_get_freq(opp); + unsigned long old_freq = opp_get_freq(data->curr_opp); + + if (IS_ERR(opp)) + return PTR_ERR(opp); if (old_freq == freq) return 0; @@ -689,9 +693,7 @@ static int exynos4_get_busier_dmc(struct busfreq_data *data) static int exynos4_bus_get_dev_status(struct device *dev, struct devfreq_dev_status *stat) { - struct platform_device *pdev = container_of(dev, struct platform_device, - dev); - struct busfreq_data *data = platform_get_drvdata(pdev); + struct busfreq_data *data = dev_get_drvdata(dev); int busier_dmc; int cycles_x2 = 2; /* 2 x cycles */ void __iomem *addr; @@ -739,9 +741,7 @@ static int exynos4_bus_get_dev_status(struct device *dev, static void exynos4_bus_exit(struct device *dev) { - struct platform_device *pdev = container_of(dev, struct platform_device, - dev); - struct busfreq_data *data = platform_get_drvdata(pdev); + struct busfreq_data *data = dev_get_drvdata(dev); devfreq_unregister_opp_notifier(dev, data->devfreq); } @@ -1087,9 +1087,7 @@ static __devexit int exynos4_busfreq_remove(struct platform_device *pdev) static int exynos4_busfreq_resume(struct device *dev) { - struct platform_device *pdev = container_of(dev, struct platform_device, - dev); - struct busfreq_data *data = platform_get_drvdata(pdev); + struct busfreq_data *data = dev_get_drvdata(dev); busfreq_mon_reset(data); return 0; @@ -1132,4 +1130,3 @@ module_exit(exynos4_busfreq_exit); MODULE_LICENSE("GPL"); MODULE_DESCRIPTION("EXYNOS4 busfreq driver with devfreq framework"); MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>"); -MODULE_ALIAS("exynos4-busfreq"); diff --git a/drivers/devfreq/governor_performance.c b/drivers/devfreq/governor_performance.c index c0596b291761..574a06b1b1de 100644 --- a/drivers/devfreq/governor_performance.c +++ b/drivers/devfreq/governor_performance.c @@ -18,7 +18,10 @@ static int devfreq_performance_func(struct devfreq *df, * target callback should be able to get floor value as * said in devfreq.h */ - *freq = UINT_MAX; + if (!df->max_freq) + *freq = UINT_MAX; + else + *freq = df->max_freq; return 0; } diff --git a/drivers/devfreq/governor_powersave.c b/drivers/devfreq/governor_powersave.c index 2483a85a266f..d742d4a82d6a 100644 --- a/drivers/devfreq/governor_powersave.c +++ b/drivers/devfreq/governor_powersave.c @@ -18,7 +18,7 @@ static int devfreq_powersave_func(struct devfreq *df, * target callback should be able to get ceiling value as * said in devfreq.h */ - *freq = 0; + *freq = df->min_freq; return 0; } diff --git a/drivers/devfreq/governor_simpleondemand.c b/drivers/devfreq/governor_simpleondemand.c index efad8dcf9028..a2e3eae79011 100644 --- a/drivers/devfreq/governor_simpleondemand.c +++ b/drivers/devfreq/governor_simpleondemand.c @@ -25,6 +25,7 @@ static int devfreq_simple_ondemand_func(struct devfreq *df, unsigned int dfso_upthreshold = DFSO_UPTHRESHOLD; unsigned int dfso_downdifferential = DFSO_DOWNDIFFERENCTIAL; struct devfreq_simple_ondemand_data *data = df->data; + unsigned long max = (df->max_freq) ? df->max_freq : UINT_MAX; if (err) return err; @@ -41,7 +42,7 @@ static int devfreq_simple_ondemand_func(struct devfreq *df, /* Assume MAX if it is going to be divided by zero */ if (stat.total_time == 0) { - *freq = UINT_MAX; + *freq = max; return 0; } @@ -54,13 +55,13 @@ static int devfreq_simple_ondemand_func(struct devfreq *df, /* Set MAX if it's busy enough */ if (stat.busy_time * 100 > stat.total_time * dfso_upthreshold) { - *freq = UINT_MAX; + *freq = max; return 0; } /* Set MAX if we do not know the initial frequency */ if (stat.current_frequency == 0) { - *freq = UINT_MAX; + *freq = max; return 0; } @@ -79,6 +80,11 @@ static int devfreq_simple_ondemand_func(struct devfreq *df, b = div_u64(b, (dfso_upthreshold - dfso_downdifferential / 2)); *freq = (unsigned long) b; + if (df->min_freq && *freq < df->min_freq) + *freq = df->min_freq; + if (df->max_freq && *freq > df->max_freq) + *freq = df->max_freq; + return 0; } diff --git a/drivers/devfreq/governor_userspace.c b/drivers/devfreq/governor_userspace.c index 4f8b563da782..0681246fc89d 100644 --- a/drivers/devfreq/governor_userspace.c +++ b/drivers/devfreq/governor_userspace.c @@ -25,10 +25,19 @@ static int devfreq_userspace_func(struct devfreq *df, unsigned long *freq) { struct userspace_data *data = df->data; - if (!data->valid) + if (data->valid) { + unsigned long adjusted_freq = data->user_frequency; + + if (df->max_freq && adjusted_freq > df->max_freq) + adjusted_freq = df->max_freq; + + if (df->min_freq && adjusted_freq < df->min_freq) + adjusted_freq = df->min_freq; + + *freq = adjusted_freq; + } else { *freq = df->previous_freq; /* No user freq specified yet */ - else - *freq = data->user_frequency; + } return 0; } diff --git a/drivers/mmc/host/sh_mmcif.c b/drivers/mmc/host/sh_mmcif.c index 352d4797865b..75a485448796 100644 --- a/drivers/mmc/host/sh_mmcif.c +++ b/drivers/mmc/host/sh_mmcif.c @@ -56,6 +56,7 @@ #include <linux/mmc/sh_mmcif.h> #include <linux/pagemap.h> #include <linux/platform_device.h> +#include <linux/pm_qos.h> #include <linux/pm_runtime.h> #include <linux/spinlock.h> #include <linux/module.h> @@ -1346,6 +1347,8 @@ static int __devinit sh_mmcif_probe(struct platform_device *pdev) if (ret < 0) goto clean_up5; + dev_pm_qos_expose_latency_limit(&pdev->dev, 100); + dev_info(&pdev->dev, "driver version %s\n", DRIVER_VERSION); dev_dbg(&pdev->dev, "chip ver H'%04x\n", sh_mmcif_readl(host->addr, MMCIF_CE_VERSION) & 0x0000ffff); @@ -1376,6 +1379,8 @@ static int __devexit sh_mmcif_remove(struct platform_device *pdev) host->dying = true; pm_runtime_get_sync(&pdev->dev); + dev_pm_qos_hide_latency_limit(&pdev->dev); + mmc_remove_host(host->mmc); sh_mmcif_writel(host->addr, MMCIF_CE_INT_MASK, MASK_ALL); diff --git a/drivers/mmc/host/tmio_mmc_pio.c b/drivers/mmc/host/tmio_mmc_pio.c index 5f9ad74fbf80..e21988901c36 100644 --- a/drivers/mmc/host/tmio_mmc_pio.c +++ b/drivers/mmc/host/tmio_mmc_pio.c @@ -39,6 +39,7 @@ #include <linux/module.h> #include <linux/pagemap.h> #include <linux/platform_device.h> +#include <linux/pm_qos.h> #include <linux/pm_runtime.h> #include <linux/scatterlist.h> #include <linux/spinlock.h> @@ -955,6 +956,8 @@ int __devinit tmio_mmc_host_probe(struct tmio_mmc_host **host, mmc_add_host(mmc); + dev_pm_qos_expose_latency_limit(&pdev->dev, 100); + /* Unmask the IRQs we want to know about */ if (!_host->chan_rx) irq_mask |= TMIO_MASK_READOP; @@ -993,6 +996,8 @@ void tmio_mmc_host_remove(struct tmio_mmc_host *host) || host->mmc->caps & MMC_CAP_NONREMOVABLE) pm_runtime_get_sync(&pdev->dev); + dev_pm_qos_hide_latency_limit(&pdev->dev); + mmc_remove_host(host->mmc); cancel_work_sync(&host->done); cancel_delayed_work_sync(&host->delayed_reset_work); diff --git a/drivers/xen/manage.c b/drivers/xen/manage.c index ce4fa0831860..9e14ae6cd49c 100644 --- a/drivers/xen/manage.c +++ b/drivers/xen/manage.c @@ -129,9 +129,9 @@ static void do_suspend(void) printk(KERN_DEBUG "suspending xenstore...\n"); xs_suspend(); - err = dpm_suspend_noirq(PMSG_FREEZE); + err = dpm_suspend_end(PMSG_FREEZE); if (err) { - printk(KERN_ERR "dpm_suspend_noirq failed: %d\n", err); + printk(KERN_ERR "dpm_suspend_end failed: %d\n", err); goto out_resume; } @@ -149,7 +149,7 @@ static void do_suspend(void) err = stop_machine(xen_suspend, &si, cpumask_of(0)); - dpm_resume_noirq(si.cancelled ? PMSG_THAW : PMSG_RESTORE); + dpm_resume_start(si.cancelled ? PMSG_THAW : PMSG_RESTORE); if (err) { printk(KERN_ERR "failed to start xen_suspend: %d\n", err); |