| Message ID | 1344516365-7230-11-git-send-email-durgadoss.r@intel.com (mailing list archive) |
|---|---|
| State | Not Applicable, archived |
| Headers | show |
On ?, 2012-08-09 at 18:16 +0530, Durgadoss R wrote: > This patch removes the throttling logic out of > thermal_sys.c; also refactors the code into smaller > functions so that are easy to read/maintain. > * Seperates the handling of critical and non-critical trips > * Re-arranges the set_polling and device_check methods, so > that all related functions are arranged in one place. > * Removes the 'do_update' and 'trip_update' method, as part > of moving the throttling logic out of thermal_sys.c > > Signed-off-by: Durgadoss R <durgadoss.r@intel.com> > --- > drivers/thermal/thermal_sys.c | 359 ++++++++++++++++------------------------- > include/linux/thermal.h | 2 +- > 2 files changed, 137 insertions(+), 224 deletions(-) > > diff --git a/drivers/thermal/thermal_sys.c b/drivers/thermal/thermal_sys.c > index 748b12f..193d071 100644 > --- a/drivers/thermal/thermal_sys.c > +++ b/drivers/thermal/thermal_sys.c > @@ -259,6 +259,142 @@ static void do_binding(struct thermal_zone_device *tz) > } > } > > +static void thermal_zone_device_set_polling(struct thermal_zone_device *tz, > + int delay) > +{ > + cancel_delayed_work(&(tz->poll_queue)); > + > + if (!delay) > + return; > + > + if (delay > 1000) > + queue_delayed_work(system_freezable_wq, &(tz->poll_queue), > + round_jiffies(msecs_to_jiffies(delay))); > + else > + queue_delayed_work(system_freezable_wq, &(tz->poll_queue), > + msecs_to_jiffies(delay)); > +} > + > +static void monitor_thermal_zone(struct thermal_zone_device *tz) > +{ > + mutex_lock(&tz->lock); > + > + if (tz->passive) > + thermal_zone_device_set_polling(tz, tz->passive_delay); > + else if (tz->polling_delay) > + thermal_zone_device_set_polling(tz, tz->polling_delay); > + else > + thermal_zone_device_set_polling(tz, 0); > + > + mutex_unlock(&tz->lock); > +} > + > +static void notify_user_space(struct thermal_zone_device *tz, int trip) > +{ > + mutex_lock(&tz->lock); > + > + kobject_uevent(&tz->device.kobj, KOBJ_CHANGE); > + > + mutex_unlock(&tz->lock); > +} > + > +static void handle_non_critical_trips(struct thermal_zone_device *tz, > + int trip, enum thermal_trip_type trip_type) > +{ > + int throttle_policy = THERMAL_STEP_WISE; > + > + if (tz->tzp) > + throttle_policy = tz->tzp->throttle_policy; > + > + switch (throttle_policy) { > + case THERMAL_FAIR_SHARE: > + fair_share_throttle(tz, trip); > + break; > + case THERMAL_STEP_WISE: > + step_wise_throttle(tz, trip); > + break; > + case THERMAL_USER_SPACE: > + notify_user_space(tz, trip); > + break; > + } this is a little different from what I thought. IMO, each policy should register its pointer to the thermal framework. and tz->tzp points to the pointer of the policy using. and then, in handle_non_critical_trips(), the code would be like this: if(tz->tzp) tz->tzp->throttle(tz, trip); But this is also okay for now, because we have only one callback for each policy. > +} > + > +static void handle_critical_trips(struct thermal_zone_device *tz, > + int trip, enum thermal_trip_type trip_type) > +{ > + long trip_temp; > + > + tz->ops->get_trip_temp(tz, trip, &trip_temp); > + > + /* If we have not crossed the trip_temp, we do not care. */ > + if (tz->temperature < trip_temp) > + return; > + > + if (tz->ops->notify) > + tz->ops->notify(tz, trip, trip_type); > + > + if (trip_type == THERMAL_TRIP_CRITICAL) { > + pr_emerg("Critical temperature reached(%d C),shutting down\n", > + tz->temperature / 1000); > + orderly_poweroff(true); > + } > +} > + > +static void handle_thermal_trip(struct thermal_zone_device *tz, int trip) > +{ > + enum thermal_trip_type type; > + > + tz->ops->get_trip_type(tz, trip, &type); > + > + if (type == THERMAL_TRIP_CRITICAL || type == THERMAL_TRIP_HOT) > + handle_critical_trips(tz, trip, type); > + else > + handle_non_critical_trips(tz, trip, type); > + /* > + * Alright, we handled this trip successfully. > + * So, start monitoring again. > + */ > + monitor_thermal_zone(tz); > +} > + > +static void update_temperature(struct thermal_zone_device *tz) > +{ > + long temp; > + int ret; > + > + mutex_lock(&tz->lock); > + > + ret = tz->ops->get_temp(tz, &temp); > + if (ret) { > + pr_warn("failed to read out thermal zone %d\n", tz->id); > + return; > + } > + > + tz->last_temperature = tz->temperature; > + tz->temperature = temp; > + > + mutex_unlock(&tz->lock); > +} > + > +void thermal_zone_device_update(struct thermal_zone_device *tz) > +{ > + int count; > + > + update_temperature(tz); > + > + for (count = 0; count < tz->trips; count++) > + handle_thermal_trip(tz, count); > +} > +EXPORT_SYMBOL(thermal_zone_device_update); > + > +static void thermal_zone_device_check(struct work_struct *work) > +{ > + struct thermal_zone_device *tz = container_of(work, struct > + thermal_zone_device, > + poll_queue.work); > + thermal_zone_device_update(tz); > +} > + > /* sys I/F for thermal zone */ > > #define to_thermal_zone(_dev) \ > @@ -878,30 +1014,6 @@ thermal_remove_hwmon_sysfs(struct thermal_zone_device *tz) > } > #endif > > -static void thermal_zone_device_set_polling(struct thermal_zone_device *tz, > - int delay) > -{ > - cancel_delayed_work(&(tz->poll_queue)); > - > - if (!delay) > - return; > - > - if (delay > 1000) > - queue_delayed_work(system_freezable_wq, &(tz->poll_queue), > - round_jiffies(msecs_to_jiffies(delay))); > - else > - queue_delayed_work(system_freezable_wq, &(tz->poll_queue), > - msecs_to_jiffies(delay)); > -} > - > -static void thermal_zone_device_check(struct work_struct *work) > -{ > - struct thermal_zone_device *tz = container_of(work, struct > - thermal_zone_device, > - poll_queue.work); > - thermal_zone_device_update(tz); > -} > - > /** > * thermal_zone_bind_cooling_device - bind a cooling device to a thermal zone > * @tz: thermal zone device > @@ -1197,205 +1309,6 @@ void thermal_cooling_device_unregister(struct thermal_cooling_device *cdev) > } > EXPORT_SYMBOL(thermal_cooling_device_unregister); > > -static void thermal_cdev_do_update(struct thermal_cooling_device *cdev) > -{ > - struct thermal_instance *instance; > - unsigned long target = 0; > - > - /* cooling device is updated*/ > - if (cdev->updated) > - return; > - > - mutex_lock(&cdev->lock); > - /* Make sure cdev enters the deepest cooling state */ > - list_for_each_entry(instance, &cdev->thermal_instances, cdev_node) { > - if (instance->target == THERMAL_NO_TARGET) > - continue; > - if (instance->target > target) > - target = instance->target; > - } > - mutex_unlock(&cdev->lock); > - cdev->ops->set_cur_state(cdev, target); > - cdev->updated = true; > -} > - > -static void thermal_zone_do_update(struct thermal_zone_device *tz) > -{ > - struct thermal_instance *instance; > - > - list_for_each_entry(instance, &tz->thermal_instances, tz_node) > - thermal_cdev_do_update(instance->cdev); > -} > - > -/* > - * Cooling algorithm for both active and passive cooling > - * > - * 1. if the temperature is higher than a trip point, > - * a. if the trend is THERMAL_TREND_RAISING, use higher cooling > - * state for this trip point > - * b. if the trend is THERMAL_TREND_DROPPING, use lower cooling > - * state for this trip point > - * > - * 2. if the temperature is lower than a trip point, use lower > - * cooling state for this trip point > - * > - * Note that this behaves the same as the previous passive cooling > - * algorithm. > - */ > - > -static void thermal_zone_trip_update(struct thermal_zone_device *tz, > - int trip, long temp) > -{ > - struct thermal_instance *instance; > - struct thermal_cooling_device *cdev = NULL; > - unsigned long cur_state, max_state; > - long trip_temp; > - enum thermal_trip_type trip_type; > - enum thermal_trend trend; > - > - if (trip == THERMAL_TRIPS_NONE) { > - trip_temp = tz->forced_passive; > - trip_type = THERMAL_TRIPS_NONE; > - } else { > - tz->ops->get_trip_temp(tz, trip, &trip_temp); > - tz->ops->get_trip_type(tz, trip, &trip_type); > - } > - > - if (!tz->ops->get_trend || tz->ops->get_trend(tz, trip, &trend)) { > - /* > - * compare the current temperature and previous temperature > - * to get the thermal trend, if no special requirement > - */ > - if (tz->temperature > tz->last_temperature) > - trend = THERMAL_TREND_RAISING; > - else if (tz->temperature < tz->last_temperature) > - trend = THERMAL_TREND_DROPPING; > - else > - trend = THERMAL_TREND_STABLE; > - } > - > - if (temp >= trip_temp) { > - list_for_each_entry(instance, &tz->thermal_instances, tz_node) { > - if (instance->trip != trip) > - continue; > - > - cdev = instance->cdev; > - > - cdev->ops->get_cur_state(cdev, &cur_state); > - cdev->ops->get_max_state(cdev, &max_state); > - > - if (trend == THERMAL_TREND_RAISING) { > - cur_state = cur_state < instance->upper ? > - (cur_state + 1) : instance->upper; > - } else if (trend == THERMAL_TREND_DROPPING) { > - cur_state = cur_state > instance->lower ? > - (cur_state - 1) : instance->lower; > - } > - > - /* activate a passive thermal instance */ > - if ((trip_type == THERMAL_TRIP_PASSIVE || > - trip_type == THERMAL_TRIPS_NONE) && > - instance->target == THERMAL_NO_TARGET) > - tz->passive++; > - > - instance->target = cur_state; > - cdev->updated = false; /* cooling device needs update */ > - } > - } else { /* below trip */ > - list_for_each_entry(instance, &tz->thermal_instances, tz_node) { > - if (instance->trip != trip) > - continue; > - > - /* Do not use the inactive thermal instance */ > - if (instance->target == THERMAL_NO_TARGET) > - continue; > - cdev = instance->cdev; > - cdev->ops->get_cur_state(cdev, &cur_state); > - > - cur_state = cur_state > instance->lower ? > - (cur_state - 1) : THERMAL_NO_TARGET; > - > - /* deactivate a passive thermal instance */ > - if ((trip_type == THERMAL_TRIP_PASSIVE || > - trip_type == THERMAL_TRIPS_NONE) && > - cur_state == THERMAL_NO_TARGET) > - tz->passive--; > - instance->target = cur_state; > - cdev->updated = false; /* cooling device needs update */ > - } > - } > - > - return; > -} > -/** > - * thermal_zone_device_update - force an update of a thermal zone's state > - * @ttz: the thermal zone to update > - */ > - > -void thermal_zone_device_update(struct thermal_zone_device *tz) > -{ > - int count, ret = 0; > - long temp, trip_temp; > - enum thermal_trip_type trip_type; > - > - mutex_lock(&tz->lock); > - > - if (tz->ops->get_temp(tz, &temp)) { > - /* get_temp failed - retry it later */ > - pr_warn("failed to read out thermal zone %d\n", tz->id); > - goto leave; > - } > - > - tz->last_temperature = tz->temperature; > - tz->temperature = temp; > - > - for (count = 0; count < tz->trips; count++) { > - tz->ops->get_trip_type(tz, count, &trip_type); > - tz->ops->get_trip_temp(tz, count, &trip_temp); > - > - switch (trip_type) { > - case THERMAL_TRIP_CRITICAL: > - if (temp >= trip_temp) { > - if (tz->ops->notify) > - ret = tz->ops->notify(tz, count, > - trip_type); > - if (!ret) { > - pr_emerg("Critical temperature reached (%ld C), shutting down\n", > - temp/1000); > - orderly_poweroff(true); > - } > - } > - break; > - case THERMAL_TRIP_HOT: > - if (temp >= trip_temp) > - if (tz->ops->notify) > - tz->ops->notify(tz, count, trip_type); > - break; > - case THERMAL_TRIP_ACTIVE: > - thermal_zone_trip_update(tz, count, temp); > - break; > - case THERMAL_TRIP_PASSIVE: > - if (temp >= trip_temp || tz->passive) > - thermal_zone_trip_update(tz, count, temp); > - break; > - } > - } > - > - if (tz->forced_passive) > - thermal_zone_trip_update(tz, THERMAL_TRIPS_NONE, temp); > - thermal_zone_do_update(tz); > - > -leave: > - if (tz->passive) > - thermal_zone_device_set_polling(tz, tz->passive_delay); > - else if (tz->polling_delay) > - thermal_zone_device_set_polling(tz, tz->polling_delay); > - else > - thermal_zone_device_set_polling(tz, 0); > - mutex_unlock(&tz->lock); > -} > -EXPORT_SYMBOL(thermal_zone_device_update); > - > static int create_policy_attr(struct thermal_zone_device *tz) > { > sysfs_attr_init(&tz->policy_attr.attr); > diff --git a/include/linux/thermal.h b/include/linux/thermal.h > index 60d2743..3bdf5f2 100644 > --- a/include/linux/thermal.h > +++ b/include/linux/thermal.h > @@ -236,12 +236,12 @@ int thermal_zone_bind_cooling_device(struct thermal_zone_device *, int, > unsigned long, unsigned long); > int thermal_zone_unbind_cooling_device(struct thermal_zone_device *, int, > struct thermal_cooling_device *); > -void thermal_zone_device_update(struct thermal_zone_device *); > > struct thermal_cooling_device *thermal_cooling_device_register(char *, void *, > const struct thermal_cooling_device_ops *); > void thermal_cooling_device_unregister(struct thermal_cooling_device *); > > +void thermal_zone_device_update(struct thermal_zone_device *); > int get_tz_trend(struct thermal_zone_device *, int); > struct thermal_cooling_device *get_cdev_by_name(const char *); > struct thermal_instance *get_thermal_instance(struct thermal_zone_device *, -- To unsubscribe from this list: send the line "unsubscribe linux-pm" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Hi Rui, [cut.] > > +static void notify_user_space(struct thermal_zone_device *tz, int trip) > > +{ > > + mutex_lock(&tz->lock); > > + > > + kobject_uevent(&tz->device.kobj, KOBJ_CHANGE); > > + > > + mutex_unlock(&tz->lock); > > +} > > + > > +static void handle_non_critical_trips(struct thermal_zone_device *tz, > > + int trip, enum thermal_trip_type trip_type) > > +{ > > + int throttle_policy = THERMAL_STEP_WISE; > > + > > + if (tz->tzp) > > + throttle_policy = tz->tzp->throttle_policy; > > + > > + switch (throttle_policy) { > > + case THERMAL_FAIR_SHARE: > > + fair_share_throttle(tz, trip); > > + break; > > + case THERMAL_STEP_WISE: > > + step_wise_throttle(tz, trip); > > + break; > > + case THERMAL_USER_SPACE: > > + notify_user_space(tz, trip); > > + break; > > + } > > this is a little different from what I thought. > IMO, each policy should register its pointer to the thermal framework. > and tz->tzp points to the pointer of the policy using. > and then, in handle_non_critical_trips(), the code would be like this: > if(tz->tzp) > tz->tzp->throttle(tz, trip); > > But this is also okay for now, because we have only one callback for > each policy. I completely agree with you here. When I was doing my initial development, I found that some policies need two arguments/ some need three etc.. That’s why could not do a function pointer implementation. Will try to fix it up in the next version of the patches. Thank you, Durga
Hello, On Mon, Aug 13, 2012 at 08:04:03AM +0000, R, Durgadoss wrote: > Hi Rui, > > [cut.] > > > +static void notify_user_space(struct thermal_zone_device *tz, int trip) > > > +{ > > > + mutex_lock(&tz->lock); > > > + > > > + kobject_uevent(&tz->device.kobj, KOBJ_CHANGE); > > > + > > > + mutex_unlock(&tz->lock); > > > +} > > > + > > > +static void handle_non_critical_trips(struct thermal_zone_device *tz, > > > + int trip, enum thermal_trip_type trip_type) > > > +{ > > > + int throttle_policy = THERMAL_STEP_WISE; > > > + > > > + if (tz->tzp) > > > + throttle_policy = tz->tzp->throttle_policy; > > > + > > > + switch (throttle_policy) { > > > + case THERMAL_FAIR_SHARE: > > > + fair_share_throttle(tz, trip); > > > + break; > > > + case THERMAL_STEP_WISE: > > > + step_wise_throttle(tz, trip); > > > + break; > > > + case THERMAL_USER_SPACE: > > > + notify_user_space(tz, trip); > > > + break; > > > + } > > > > this is a little different from what I thought. > > IMO, each policy should register its pointer to the thermal framework. > > and tz->tzp points to the pointer of the policy using. > > and then, in handle_non_critical_trips(), the code would be like this: > > if(tz->tzp) > > tz->tzp->throttle(tz, trip); > > > > But this is also okay for now, because we have only one callback for > > each policy. > > I completely agree with you here. When I was doing my initial development, > I found that some policies need two arguments/ some need three etc.. > That’s why could not do a function pointer implementation. > > Will try to fix it up in the next version of the patches. Cool! I'd also prefer to use the ->ops type of design, if possible. > > Thank you, > Durga -- To unsubscribe from this list: send the line "unsubscribe linux-pm" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/thermal/thermal_sys.c b/drivers/thermal/thermal_sys.c index 748b12f..193d071 100644 --- a/drivers/thermal/thermal_sys.c +++ b/drivers/thermal/thermal_sys.c @@ -259,6 +259,142 @@ static void do_binding(struct thermal_zone_device *tz) } } +static void thermal_zone_device_set_polling(struct thermal_zone_device *tz, + int delay) +{ + cancel_delayed_work(&(tz->poll_queue)); + + if (!delay) + return; + + if (delay > 1000) + queue_delayed_work(system_freezable_wq, &(tz->poll_queue), + round_jiffies(msecs_to_jiffies(delay))); + else + queue_delayed_work(system_freezable_wq, &(tz->poll_queue), + msecs_to_jiffies(delay)); +} + +static void monitor_thermal_zone(struct thermal_zone_device *tz) +{ + mutex_lock(&tz->lock); + + if (tz->passive) + thermal_zone_device_set_polling(tz, tz->passive_delay); + else if (tz->polling_delay) + thermal_zone_device_set_polling(tz, tz->polling_delay); + else + thermal_zone_device_set_polling(tz, 0); + + mutex_unlock(&tz->lock); +} + +static void notify_user_space(struct thermal_zone_device *tz, int trip) +{ + mutex_lock(&tz->lock); + + kobject_uevent(&tz->device.kobj, KOBJ_CHANGE); + + mutex_unlock(&tz->lock); +} + +static void handle_non_critical_trips(struct thermal_zone_device *tz, + int trip, enum thermal_trip_type trip_type) +{ + int throttle_policy = THERMAL_STEP_WISE; + + if (tz->tzp) + throttle_policy = tz->tzp->throttle_policy; + + switch (throttle_policy) { + case THERMAL_FAIR_SHARE: + fair_share_throttle(tz, trip); + break; + case THERMAL_STEP_WISE: + step_wise_throttle(tz, trip); + break; + case THERMAL_USER_SPACE: + notify_user_space(tz, trip); + break; + } +} + +static void handle_critical_trips(struct thermal_zone_device *tz, + int trip, enum thermal_trip_type trip_type) +{ + long trip_temp; + + tz->ops->get_trip_temp(tz, trip, &trip_temp); + + /* If we have not crossed the trip_temp, we do not care. */ + if (tz->temperature < trip_temp) + return; + + if (tz->ops->notify) + tz->ops->notify(tz, trip, trip_type); + + if (trip_type == THERMAL_TRIP_CRITICAL) { + pr_emerg("Critical temperature reached(%d C),shutting down\n", + tz->temperature / 1000); + orderly_poweroff(true); + } +} + +static void handle_thermal_trip(struct thermal_zone_device *tz, int trip) +{ + enum thermal_trip_type type; + + tz->ops->get_trip_type(tz, trip, &type); + + if (type == THERMAL_TRIP_CRITICAL || type == THERMAL_TRIP_HOT) + handle_critical_trips(tz, trip, type); + else + handle_non_critical_trips(tz, trip, type); + /* + * Alright, we handled this trip successfully. + * So, start monitoring again. + */ + monitor_thermal_zone(tz); +} + +static void update_temperature(struct thermal_zone_device *tz) +{ + long temp; + int ret; + + mutex_lock(&tz->lock); + + ret = tz->ops->get_temp(tz, &temp); + if (ret) { + pr_warn("failed to read out thermal zone %d\n", tz->id); + return; + } + + tz->last_temperature = tz->temperature; + tz->temperature = temp; + + mutex_unlock(&tz->lock); +} + +void thermal_zone_device_update(struct thermal_zone_device *tz) +{ + int count; + + update_temperature(tz); + + for (count = 0; count < tz->trips; count++) + handle_thermal_trip(tz, count); +} +EXPORT_SYMBOL(thermal_zone_device_update); + +static void thermal_zone_device_check(struct work_struct *work) +{ + struct thermal_zone_device *tz = container_of(work, struct + thermal_zone_device, + poll_queue.work); + thermal_zone_device_update(tz); +} + /* sys I/F for thermal zone */ #define to_thermal_zone(_dev) \ @@ -878,30 +1014,6 @@ thermal_remove_hwmon_sysfs(struct thermal_zone_device *tz) } #endif -static void thermal_zone_device_set_polling(struct thermal_zone_device *tz, - int delay) -{ - cancel_delayed_work(&(tz->poll_queue)); - - if (!delay) - return; - - if (delay > 1000) - queue_delayed_work(system_freezable_wq, &(tz->poll_queue), - round_jiffies(msecs_to_jiffies(delay))); - else - queue_delayed_work(system_freezable_wq, &(tz->poll_queue), - msecs_to_jiffies(delay)); -} - -static void thermal_zone_device_check(struct work_struct *work) -{ - struct thermal_zone_device *tz = container_of(work, struct - thermal_zone_device, - poll_queue.work); - thermal_zone_device_update(tz); -} - /** * thermal_zone_bind_cooling_device - bind a cooling device to a thermal zone * @tz: thermal zone device @@ -1197,205 +1309,6 @@ void thermal_cooling_device_unregister(struct thermal_cooling_device *cdev) } EXPORT_SYMBOL(thermal_cooling_device_unregister); -static void thermal_cdev_do_update(struct thermal_cooling_device *cdev) -{ - struct thermal_instance *instance; - unsigned long target = 0; - - /* cooling device is updated*/ - if (cdev->updated) - return; - - mutex_lock(&cdev->lock); - /* Make sure cdev enters the deepest cooling state */ - list_for_each_entry(instance, &cdev->thermal_instances, cdev_node) { - if (instance->target == THERMAL_NO_TARGET) - continue; - if (instance->target > target) - target = instance->target; - } - mutex_unlock(&cdev->lock); - cdev->ops->set_cur_state(cdev, target); - cdev->updated = true; -} - -static void thermal_zone_do_update(struct thermal_zone_device *tz) -{ - struct thermal_instance *instance; - - list_for_each_entry(instance, &tz->thermal_instances, tz_node) - thermal_cdev_do_update(instance->cdev); -} - -/* - * Cooling algorithm for both active and passive cooling - * - * 1. if the temperature is higher than a trip point, - * a. if the trend is THERMAL_TREND_RAISING, use higher cooling - * state for this trip point - * b. if the trend is THERMAL_TREND_DROPPING, use lower cooling - * state for this trip point - * - * 2. if the temperature is lower than a trip point, use lower - * cooling state for this trip point - * - * Note that this behaves the same as the previous passive cooling - * algorithm. - */ - -static void thermal_zone_trip_update(struct thermal_zone_device *tz, - int trip, long temp) -{ - struct thermal_instance *instance; - struct thermal_cooling_device *cdev = NULL; - unsigned long cur_state, max_state; - long trip_temp; - enum thermal_trip_type trip_type; - enum thermal_trend trend; - - if (trip == THERMAL_TRIPS_NONE) { - trip_temp = tz->forced_passive; - trip_type = THERMAL_TRIPS_NONE; - } else { - tz->ops->get_trip_temp(tz, trip, &trip_temp); - tz->ops->get_trip_type(tz, trip, &trip_type); - } - - if (!tz->ops->get_trend || tz->ops->get_trend(tz, trip, &trend)) { - /* - * compare the current temperature and previous temperature - * to get the thermal trend, if no special requirement - */ - if (tz->temperature > tz->last_temperature) - trend = THERMAL_TREND_RAISING; - else if (tz->temperature < tz->last_temperature) - trend = THERMAL_TREND_DROPPING; - else - trend = THERMAL_TREND_STABLE; - } - - if (temp >= trip_temp) { - list_for_each_entry(instance, &tz->thermal_instances, tz_node) { - if (instance->trip != trip) - continue; - - cdev = instance->cdev; - - cdev->ops->get_cur_state(cdev, &cur_state); - cdev->ops->get_max_state(cdev, &max_state); - - if (trend == THERMAL_TREND_RAISING) { - cur_state = cur_state < instance->upper ? - (cur_state + 1) : instance->upper; - } else if (trend == THERMAL_TREND_DROPPING) { - cur_state = cur_state > instance->lower ? - (cur_state - 1) : instance->lower; - } - - /* activate a passive thermal instance */ - if ((trip_type == THERMAL_TRIP_PASSIVE || - trip_type == THERMAL_TRIPS_NONE) && - instance->target == THERMAL_NO_TARGET) - tz->passive++; - - instance->target = cur_state; - cdev->updated = false; /* cooling device needs update */ - } - } else { /* below trip */ - list_for_each_entry(instance, &tz->thermal_instances, tz_node) { - if (instance->trip != trip) - continue; - - /* Do not use the inactive thermal instance */ - if (instance->target == THERMAL_NO_TARGET) - continue; - cdev = instance->cdev; - cdev->ops->get_cur_state(cdev, &cur_state); - - cur_state = cur_state > instance->lower ? - (cur_state - 1) : THERMAL_NO_TARGET; - - /* deactivate a passive thermal instance */ - if ((trip_type == THERMAL_TRIP_PASSIVE || - trip_type == THERMAL_TRIPS_NONE) && - cur_state == THERMAL_NO_TARGET) - tz->passive--; - instance->target = cur_state; - cdev->updated = false; /* cooling device needs update */ - } - } - - return; -} -/** - * thermal_zone_device_update - force an update of a thermal zone's state - * @ttz: the thermal zone to update - */ - -void thermal_zone_device_update(struct thermal_zone_device *tz) -{ - int count, ret = 0; - long temp, trip_temp; - enum thermal_trip_type trip_type; - - mutex_lock(&tz->lock); - - if (tz->ops->get_temp(tz, &temp)) { - /* get_temp failed - retry it later */ - pr_warn("failed to read out thermal zone %d\n", tz->id); - goto leave; - } - - tz->last_temperature = tz->temperature; - tz->temperature = temp; - - for (count = 0; count < tz->trips; count++) { - tz->ops->get_trip_type(tz, count, &trip_type); - tz->ops->get_trip_temp(tz, count, &trip_temp); - - switch (trip_type) { - case THERMAL_TRIP_CRITICAL: - if (temp >= trip_temp) { - if (tz->ops->notify) - ret = tz->ops->notify(tz, count, - trip_type); - if (!ret) { - pr_emerg("Critical temperature reached (%ld C), shutting down\n", - temp/1000); - orderly_poweroff(true); - } - } - break; - case THERMAL_TRIP_HOT: - if (temp >= trip_temp) - if (tz->ops->notify) - tz->ops->notify(tz, count, trip_type); - break; - case THERMAL_TRIP_ACTIVE: - thermal_zone_trip_update(tz, count, temp); - break; - case THERMAL_TRIP_PASSIVE: - if (temp >= trip_temp || tz->passive) - thermal_zone_trip_update(tz, count, temp); - break; - } - } - - if (tz->forced_passive) - thermal_zone_trip_update(tz, THERMAL_TRIPS_NONE, temp); - thermal_zone_do_update(tz); - -leave: - if (tz->passive) - thermal_zone_device_set_polling(tz, tz->passive_delay); - else if (tz->polling_delay) - thermal_zone_device_set_polling(tz, tz->polling_delay); - else - thermal_zone_device_set_polling(tz, 0); - mutex_unlock(&tz->lock); -} -EXPORT_SYMBOL(thermal_zone_device_update); - static int create_policy_attr(struct thermal_zone_device *tz) { sysfs_attr_init(&tz->policy_attr.attr); diff --git a/include/linux/thermal.h b/include/linux/thermal.h index 60d2743..3bdf5f2 100644 --- a/include/linux/thermal.h +++ b/include/linux/thermal.h @@ -236,12 +236,12 @@ int thermal_zone_bind_cooling_device(struct thermal_zone_device *, int, unsigned long, unsigned long); int thermal_zone_unbind_cooling_device(struct thermal_zone_device *, int, struct thermal_cooling_device *); -void thermal_zone_device_update(struct thermal_zone_device *); struct thermal_cooling_device *thermal_cooling_device_register(char *, void *, const struct thermal_cooling_device_ops *); void thermal_cooling_device_unregister(struct thermal_cooling_device *); +void thermal_zone_device_update(struct thermal_zone_device *); int get_tz_trend(struct thermal_zone_device *, int); struct thermal_cooling_device *get_cdev_by_name(const char *); struct thermal_instance *get_thermal_instance(struct thermal_zone_device *,
This patch removes the throttling logic out of thermal_sys.c; also refactors the code into smaller functions so that are easy to read/maintain. * Seperates the handling of critical and non-critical trips * Re-arranges the set_polling and device_check methods, so that all related functions are arranged in one place. * Removes the 'do_update' and 'trip_update' method, as part of moving the throttling logic out of thermal_sys.c Signed-off-by: Durgadoss R <durgadoss.r@intel.com> --- drivers/thermal/thermal_sys.c | 359 ++++++++++++++++------------------------- include/linux/thermal.h | 2 +- 2 files changed, 137 insertions(+), 224 deletions(-)