linux-kernel - [PATCH v4 4/4] thermal: core: Add notifications call in the framework

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Mon,  6 Jul 2020 12:55:38 +0200
From:   Daniel Lezcano <daniel.lezcano@...aro.org>
To:     daniel.lezcano@...aro.org, rui.zhang@...el.com
Cc:     srinivas.pandruvada@...ux.intel.com, rkumbako@...eaurora.org,
        amit.kucheria@...aro.org, linux-kernel@...r.kernel.org,
        linux-pm@...r.kernel.org
Subject: [PATCH v4 4/4] thermal: core: Add notifications call in the framework

The generic netlink protocol is implemented but the different
notification functions are not yet connected to the core code.

These changes add the notification calls in the different
corresponding places.

Reviewed-by: Amit Kucheria <amit.kucheria@...aro.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@...aro.org>
---
  v4:
     - Fixed missing static declaration, reported by kbuild-bot
     - Removed max state notification
---
 drivers/thermal/thermal_core.c    | 21 +++++++++++++++++++++
 drivers/thermal/thermal_helpers.c | 13 +++++++++++--
 drivers/thermal/thermal_sysfs.c   | 15 ++++++++++++++-
 3 files changed, 46 insertions(+), 3 deletions(-)

diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c
index 5fae1621fb01..25ef29123f72 100644
--- a/drivers/thermal/thermal_core.c
+++ b/drivers/thermal/thermal_core.c
@@ -215,6 +215,8 @@ int thermal_zone_device_set_policy(struct thermal_zone_device *tz,
 	mutex_unlock(&tz->lock);
 	mutex_unlock(&thermal_governor_lock);
 
+	thermal_notify_tz_gov_change(tz->id, policy);
+
 	return ret;
 }
 
@@ -406,12 +408,25 @@ static void handle_critical_trips(struct thermal_zone_device *tz,
 static void handle_thermal_trip(struct thermal_zone_device *tz, int trip)
 {
 	enum thermal_trip_type type;
+	int trip_temp, hyst = 0;
 
 	/* Ignore disabled trip points */
 	if (test_bit(trip, &tz->trips_disabled))
 		return;
 
+	tz->ops->get_trip_temp(tz, trip, &trip_temp);
 	tz->ops->get_trip_type(tz, trip, &type);
+	if (tz->ops->get_trip_hyst)
+		tz->ops->get_trip_hyst(tz, trip, &hyst);
+
+	if (tz->last_temperature != THERMAL_TEMP_INVALID) {
+		if (tz->last_temperature < trip_temp &&
+		    tz->temperature >= trip_temp)
+			thermal_notify_tz_trip_up(tz->id, trip);
+		if (tz->last_temperature >= trip_temp &&
+		    tz->temperature < (trip_temp - hyst))
+			thermal_notify_tz_trip_down(tz->id, trip);
+	}
 
 	if (type == THERMAL_TRIP_CRITICAL || type == THERMAL_TRIP_HOT)
 		handle_critical_trips(tz, trip, type);
@@ -443,6 +458,8 @@ static void update_temperature(struct thermal_zone_device *tz)
 	mutex_unlock(&tz->lock);
 
 	trace_thermal_temperature(tz);
+
+	thermal_genl_sampling_temp(tz->id, temp);
 }
 
 static void thermal_zone_device_init(struct thermal_zone_device *tz)
@@ -1405,6 +1422,8 @@ thermal_zone_device_register(const char *type, int trips, int mask,
 	if (atomic_cmpxchg(&tz->need_update, 1, 0))
 		thermal_zone_device_update(tz, THERMAL_EVENT_UNSPECIFIED);
 
+	thermal_notify_tz_create(tz->id, tz->type);
+
 	return tz;
 
 unregister:
@@ -1476,6 +1495,8 @@ void thermal_zone_device_unregister(struct thermal_zone_device *tz)
 	ida_destroy(&tz->ida);
 	mutex_destroy(&tz->lock);
 	device_unregister(&tz->device);
+
+	thermal_notify_tz_delete(tz->id);
 }
 EXPORT_SYMBOL_GPL(thermal_zone_device_unregister);
 
diff --git a/drivers/thermal/thermal_helpers.c b/drivers/thermal/thermal_helpers.c
index 87b1256fa2f2..c94bc824e5d3 100644
--- a/drivers/thermal/thermal_helpers.c
+++ b/drivers/thermal/thermal_helpers.c
@@ -175,6 +175,16 @@ void thermal_zone_set_trips(struct thermal_zone_device *tz)
 	mutex_unlock(&tz->lock);
 }
 
+static void thermal_cdev_set_cur_state(struct thermal_cooling_device *cdev,
+				       int target)
+{
+	if (cdev->ops->set_cur_state(cdev, target))
+		return;
+
+	thermal_notify_cdev_state_update(cdev->id, target);
+	thermal_cooling_device_stats_update(cdev, target);
+}
+
 void thermal_cdev_update(struct thermal_cooling_device *cdev)
 {
 	struct thermal_instance *instance;
@@ -197,8 +207,7 @@ void thermal_cdev_update(struct thermal_cooling_device *cdev)
 			target = instance->target;
 	}
 
-	if (!cdev->ops->set_cur_state(cdev, target))
-		thermal_cooling_device_stats_update(cdev, target);
+	thermal_cdev_set_cur_state(cdev, target);
 
 	cdev->updated = true;
 	mutex_unlock(&cdev->lock);
diff --git a/drivers/thermal/thermal_sysfs.c b/drivers/thermal/thermal_sysfs.c
index aa99edb4dff7..ff449943f757 100644
--- a/drivers/thermal/thermal_sysfs.c
+++ b/drivers/thermal/thermal_sysfs.c
@@ -124,7 +124,8 @@ trip_point_temp_store(struct device *dev, struct device_attribute *attr,
 {
 	struct thermal_zone_device *tz = to_thermal_zone(dev);
 	int trip, ret;
-	int temperature;
+	int temperature, hyst = 0;
+	enum thermal_trip_type type;
 
 	if (!tz->ops->set_trip_temp)
 		return -EPERM;
@@ -139,6 +140,18 @@ trip_point_temp_store(struct device *dev, struct device_attribute *attr,
 	if (ret)
 		return ret;
 
+	if (tz->ops->get_trip_hyst) {
+		ret = tz->ops->get_trip_hyst(tz, trip, &hyst);
+		if (ret)
+			return ret;
+	}
+
+	ret = tz->ops->get_trip_type(tz, trip, &type);
+	if (ret)
+		return ret;
+
+	thermal_notify_tz_trip_change(tz->id, trip, type, temperature, hyst);
+
 	thermal_zone_device_update(tz, THERMAL_EVENT_UNSPECIFIED);
 
 	return count;
-- 
2.17.1