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[130.180.211.218]) by smtp.gmail.com with ESMTPSA id m21-20020a05600c3b1500b003a317ee3036sm293583wms.2.2022.08.09.15.04.53 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 09 Aug 2022 15:04:53 -0700 (PDT) From: Daniel Lezcano To: daniel.lezcano@linaro.org, rafael@kernel.org Cc: rui.zhang@intel.com, linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, Amit Kucheria Subject: [PATCH v2 01/26] thermal/core: encapsulate ops->get_trip_* ops into a function Date: Wed, 10 Aug 2022 00:04:11 +0200 Message-Id: <20220809220436.711020-2-daniel.lezcano@linaro.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220809220436.711020-1-daniel.lezcano@linaro.org> References: <20220809220436.711020-1-daniel.lezcano@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" The thermal_zone_device_ops structure defines a set of ops family, get_trip_temp(), get_trip_hyst(), get_trip_type(). Each of them is returning a property of a trip point. The result is the code is calling the ops everywhere to get a trip point which is supposed to be defined in the backend driver. It is a non-sense as a thermal trip can be generic and used by the backend driver to declare its trip points. Part of the thermal framework has been changed and all the OF thermal drivers are using the same definition for the trip point and use a thermal zone registration variant to pass those trip points which are part of the thermal zone device structure. Consequently, we can use a generic function to get the trip points when they are stored in the thermal zone device structure. This approach can be generalized to all the drivers and we can get rid of the ops->get_trip_*. That will result to a much more simpler code and make possible to rework how the thermal trip are handled in the thermal core framework as discussed previously. This change adds a function thermal_zone_get_trip() where we get the thermal trip point structure which contains all the properties (type, temp, hyst) instead of doing multiple calls to ops->get_trip_*. That opens the door for trip point extension with more attributes. For instance, replacing the trip points disabled bitmask with a 'disabled' field in the structure. Here we replace all the calls to ops->get_trip_* in the thermal core code with a call to the thermal_zone_get_trip() function. While at it, add the thermal_zone_get_num_trips() to encapsulate the code more and reduce the grip with the thermal framework internals. Signed-off-by: Daniel Lezcano --- drivers/thermal/thermal_core.c | 69 ++++++++++++++++++++----------- drivers/thermal/thermal_core.h | 8 ++++ drivers/thermal/thermal_helpers.c | 28 ++++++------- drivers/thermal/thermal_netlink.c | 21 ++++------ drivers/thermal/thermal_sysfs.c | 66 ++++++++++++----------------- 5 files changed, 103 insertions(+), 89 deletions(-) diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c index 10c979dce512..5891b86758c1 100644 --- a/drivers/thermal/thermal_core.c +++ b/drivers/thermal/thermal_core.c @@ -354,35 +354,31 @@ static void handle_critical_trips(struct thermal_zone= _device *tz, tz->ops->critical(tz); } =20 -static void handle_thermal_trip(struct thermal_zone_device *tz, int trip) +static void handle_thermal_trip(struct thermal_zone_device *tz, int trip_i= d) { - enum thermal_trip_type type; - int trip_temp, hyst =3D 0; + struct thermal_trip trip; =20 /* Ignore disabled trip points */ - if (test_bit(trip, &tz->trips_disabled)) + if (test_bit(trip_id, &tz->trips_disabled)) return; =20 - 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); + thermal_zone_get_trip(tz, trip_id, &trip); =20 if (tz->last_temperature !=3D THERMAL_TEMP_INVALID) { - if (tz->last_temperature < trip_temp && - tz->temperature >=3D trip_temp) - thermal_notify_tz_trip_up(tz->id, trip, + if (tz->last_temperature < trip.temperature && + tz->temperature >=3D trip.temperature) + thermal_notify_tz_trip_up(tz->id, trip_id, tz->temperature); - if (tz->last_temperature >=3D trip_temp && - tz->temperature < (trip_temp - hyst)) - thermal_notify_tz_trip_down(tz->id, trip, + if (tz->last_temperature >=3D trip.temperature && + tz->temperature < (trip.temperature - trip.hysteresis)) + thermal_notify_tz_trip_down(tz->id, trip_id, tz->temperature); } =20 - if (type =3D=3D THERMAL_TRIP_CRITICAL || type =3D=3D THERMAL_TRIP_HOT) - handle_critical_trips(tz, trip, trip_temp, type); + if (trip.type =3D=3D THERMAL_TRIP_CRITICAL || trip.type =3D=3D THERMAL_TR= IP_HOT) + handle_critical_trips(tz, trip_id, trip.temperature, trip.type); else - handle_non_critical_trips(tz, trip); + handle_non_critical_trips(tz, trip_id); /* * Alright, we handled this trip successfully. * So, start monitoring again. @@ -1162,6 +1158,34 @@ static void thermal_set_delay_jiffies(unsigned long = *delay_jiffies, int delay_ms *delay_jiffies =3D round_jiffies(*delay_jiffies); } =20 +int thermal_zone_get_trip(struct thermal_zone_device *tz, int trip_id, + struct thermal_trip *trip) +{ + int ret; + + if (!tz || trip_id < 0 || trip_id >=3D tz->num_trips || !trip) + return -EINVAL; + + if (tz->trips) { + *trip =3D tz->trips[trip_id]; + return 0; + } + + if (tz->ops->get_trip_hyst) { + ret =3D tz->ops->get_trip_hyst(tz, trip_id, &trip->hysteresis); + if (ret) + return ret; + } else trip->hysteresis =3D 0; + + ret =3D tz->ops->get_trip_temp(tz, trip_id, &trip->temperature); + if (ret) + return ret; + + return tz->ops->get_trip_type(tz, trip_id, &trip->type); +} +EXPORT_SYMBOL_GPL(thermal_zone_get_trip); + + /** * thermal_zone_device_register_with_trips() - register a new thermal zone= device * @type: the thermal zone device type @@ -1194,8 +1218,6 @@ thermal_zone_device_register_with_trips(const char *t= ype, struct thermal_trip *t int polling_delay) { struct thermal_zone_device *tz; - enum thermal_trip_type trip_type; - int trip_temp; int id; int result; int count; @@ -1222,7 +1244,7 @@ thermal_zone_device_register_with_trips(const char *t= ype, struct thermal_trip *t return ERR_PTR(-EINVAL); } =20 - if (num_trips > 0 && (!ops->get_trip_type || !ops->get_trip_temp)) + if (num_trips > 0 && (!ops->get_trip_type || !ops->get_trip_temp) && !tri= ps) return ERR_PTR(-EINVAL); =20 tz =3D kzalloc(sizeof(*tz), GFP_KERNEL); @@ -1272,9 +1294,10 @@ thermal_zone_device_register_with_trips(const char *= type, struct thermal_trip *t goto release_device; =20 for (count =3D 0; count < num_trips; count++) { - if (tz->ops->get_trip_type(tz, count, &trip_type) || - tz->ops->get_trip_temp(tz, count, &trip_temp) || - !trip_temp) + struct thermal_trip trip; + + result =3D thermal_zone_get_trip(tz, count, &trip); + if (result) set_bit(count, &tz->trips_disabled); } =20 diff --git a/drivers/thermal/thermal_core.h b/drivers/thermal/thermal_core.h index 2241d2dce017..194e98a5b102 100644 --- a/drivers/thermal/thermal_core.h +++ b/drivers/thermal/thermal_core.h @@ -110,6 +110,14 @@ void thermal_unregister_governor(struct thermal_govern= or *); int thermal_zone_device_set_policy(struct thermal_zone_device *, char *); int thermal_build_list_of_policies(char *buf); =20 +int thermal_zone_get_trip(struct thermal_zone_device *tz, int trip_id, + struct thermal_trip *trip); + +static inline int thermal_zone_get_num_trips(struct thermal_zone_device *t= z) +{ + return tz->num_trips; +} + /* Helpers */ void thermal_zone_set_trips(struct thermal_zone_device *tz); =20 diff --git a/drivers/thermal/thermal_helpers.c b/drivers/thermal/thermal_he= lpers.c index 690890f054a3..626a70d70567 100644 --- a/drivers/thermal/thermal_helpers.c +++ b/drivers/thermal/thermal_helpers.c @@ -79,7 +79,7 @@ int thermal_zone_get_temp(struct thermal_zone_device *tz,= int *temp) int ret =3D -EINVAL; int count; int crit_temp =3D INT_MAX; - enum thermal_trip_type type; + struct thermal_trip trip; =20 if (!tz || IS_ERR(tz) || !tz->ops->get_temp) goto exit; @@ -90,10 +90,9 @@ int thermal_zone_get_temp(struct thermal_zone_device *tz= , int *temp) =20 if (IS_ENABLED(CONFIG_THERMAL_EMULATION) && tz->emul_temperature) { for (count =3D 0; count < tz->num_trips; count++) { - ret =3D tz->ops->get_trip_type(tz, count, &type); - if (!ret && type =3D=3D THERMAL_TRIP_CRITICAL) { - ret =3D tz->ops->get_trip_temp(tz, count, - &crit_temp); + ret =3D thermal_zone_get_trip(tz, count, &trip); + if (!ret && trip.type =3D=3D THERMAL_TRIP_CRITICAL) { + crit_temp =3D trip.temperature; break; } } @@ -127,29 +126,30 @@ EXPORT_SYMBOL_GPL(thermal_zone_get_temp); */ void thermal_zone_set_trips(struct thermal_zone_device *tz) { - int low =3D -INT_MAX; - int high =3D INT_MAX; - int trip_temp, hysteresis; + struct thermal_trip trip; + int low =3D -INT_MAX, high =3D INT_MAX; int i, ret; =20 mutex_lock(&tz->lock); =20 - if (!tz->ops->set_trips || !tz->ops->get_trip_hyst) + if (!tz->ops->set_trips) goto exit; =20 for (i =3D 0; i < tz->num_trips; i++) { int trip_low; =20 - tz->ops->get_trip_temp(tz, i, &trip_temp); - tz->ops->get_trip_hyst(tz, i, &hysteresis); + ret =3D thermal_zone_get_trip(tz, i , &trip); + if (ret) + goto exit; =20 - trip_low =3D trip_temp - hysteresis; + trip_low =3D trip.temperature - trip.hysteresis; =20 if (trip_low < tz->temperature && trip_low > low) low =3D trip_low; =20 - if (trip_temp > tz->temperature && trip_temp < high) - high =3D trip_temp; + if (trip.temperature > tz->temperature && + trip.temperature < high) + high =3D trip.temperature; } =20 /* No need to change trip points */ diff --git a/drivers/thermal/thermal_netlink.c b/drivers/thermal/thermal_ne= tlink.c index 050d243a5fa1..ce56d441c88c 100644 --- a/drivers/thermal/thermal_netlink.c +++ b/drivers/thermal/thermal_netlink.c @@ -452,7 +452,8 @@ static int thermal_genl_cmd_tz_get_trip(struct param *p) struct sk_buff *msg =3D p->msg; struct thermal_zone_device *tz; struct nlattr *start_trip; - int i, id; + struct thermal_trip trip; + int ret, i, id; =20 if (!p->attrs[THERMAL_GENL_ATTR_TZ_ID]) return -EINVAL; @@ -471,18 +472,14 @@ static int thermal_genl_cmd_tz_get_trip(struct param = *p) =20 for (i =3D 0; i < tz->num_trips; i++) { =20 - enum thermal_trip_type type; - int temp, hyst =3D 0; - - tz->ops->get_trip_type(tz, i, &type); - tz->ops->get_trip_temp(tz, i, &temp); - if (tz->ops->get_trip_hyst) - tz->ops->get_trip_hyst(tz, i, &hyst); - + ret =3D thermal_zone_get_trip(tz, i, &trip); + if (ret) + goto out_cancel_nest; + =09 if (nla_put_u32(msg, THERMAL_GENL_ATTR_TZ_TRIP_ID, i) || - nla_put_u32(msg, THERMAL_GENL_ATTR_TZ_TRIP_TYPE, type) || - nla_put_u32(msg, THERMAL_GENL_ATTR_TZ_TRIP_TEMP, temp) || - nla_put_u32(msg, THERMAL_GENL_ATTR_TZ_TRIP_HYST, hyst)) + nla_put_u32(msg, THERMAL_GENL_ATTR_TZ_TRIP_TYPE, trip.type) || + nla_put_u32(msg, THERMAL_GENL_ATTR_TZ_TRIP_TEMP, trip.temperature) || + nla_put_u32(msg, THERMAL_GENL_ATTR_TZ_TRIP_HYST, trip.hysteresis)) goto out_cancel_nest; } =20 diff --git a/drivers/thermal/thermal_sysfs.c b/drivers/thermal/thermal_sysf= s.c index 3c513561d346..2b53927f3263 100644 --- a/drivers/thermal/thermal_sysfs.c +++ b/drivers/thermal/thermal_sysfs.c @@ -79,20 +79,17 @@ trip_point_type_show(struct device *dev, struct device_= attribute *attr, char *buf) { struct thermal_zone_device *tz =3D to_thermal_zone(dev); - enum thermal_trip_type type; - int trip, result; + struct thermal_trip trip; + int trip_id, result; =20 - if (!tz->ops->get_trip_type) - return -EPERM; - - if (sscanf(attr->attr.name, "trip_point_%d_type", &trip) !=3D 1) + if (sscanf(attr->attr.name, "trip_point_%d_type", &trip_id) !=3D 1) return -EINVAL; =20 - result =3D tz->ops->get_trip_type(tz, trip, &type); + result =3D thermal_zone_get_trip(tz, trip_id, &trip); if (result) return result; =20 - switch (type) { + switch (trip.type) { case THERMAL_TRIP_CRITICAL: return sprintf(buf, "critical\n"); case THERMAL_TRIP_HOT: @@ -111,37 +108,31 @@ trip_point_temp_store(struct device *dev, struct devi= ce_attribute *attr, const char *buf, size_t count) { struct thermal_zone_device *tz =3D to_thermal_zone(dev); - int trip, ret; - int temperature, hyst =3D 0; - enum thermal_trip_type type; + struct thermal_trip trip; + int trip_id, ret; =20 if (!tz->ops->set_trip_temp && !tz->trips) return -EPERM; =20 - if (sscanf(attr->attr.name, "trip_point_%d_temp", &trip) !=3D 1) + if (sscanf(attr->attr.name, "trip_point_%d_temp", &trip_id) !=3D 1) return -EINVAL; =20 - if (kstrtoint(buf, 10, &temperature)) + if (kstrtoint(buf, 10, &trip.temperature)) return -EINVAL; =20 - ret =3D tz->ops->set_trip_temp(tz, trip, temperature); + ret =3D tz->ops->set_trip_temp(tz, trip_id, trip.temperature); if (ret) return ret; =20 if (tz->trips) - tz->trips[trip].temperature =3D temperature; - - if (tz->ops->get_trip_hyst) { - ret =3D tz->ops->get_trip_hyst(tz, trip, &hyst); - if (ret) - return ret; - } + tz->trips[trip_id].temperature =3D trip.temperature; =20 - ret =3D tz->ops->get_trip_type(tz, trip, &type); + ret =3D thermal_zone_get_trip(tz, trip_id, &trip); if (ret) return ret; =20 - thermal_notify_tz_trip_change(tz->id, trip, type, temperature, hyst); + thermal_notify_tz_trip_change(tz->id, trip_id, trip.type, + trip.temperature, trip.hysteresis); =20 thermal_zone_device_update(tz, THERMAL_EVENT_UNSPECIFIED); =20 @@ -153,21 +144,17 @@ trip_point_temp_show(struct device *dev, struct devic= e_attribute *attr, char *buf) { struct thermal_zone_device *tz =3D to_thermal_zone(dev); - int trip, ret; - int temperature; - - if (!tz->ops->get_trip_temp) - return -EPERM; + struct thermal_trip trip; + int trip_id, ret; =20 - if (sscanf(attr->attr.name, "trip_point_%d_temp", &trip) !=3D 1) + if (sscanf(attr->attr.name, "trip_point_%d_temp", &trip_id) !=3D 1) return -EINVAL; =20 - ret =3D tz->ops->get_trip_temp(tz, trip, &temperature); - + ret =3D thermal_zone_get_trip(tz, trip_id, &trip); if (ret) return ret; =20 - return sprintf(buf, "%d\n", temperature); + return sprintf(buf, "%d\n", trip.temperature); } =20 static ssize_t @@ -205,18 +192,17 @@ trip_point_hyst_show(struct device *dev, struct devic= e_attribute *attr, char *buf) { struct thermal_zone_device *tz =3D to_thermal_zone(dev); - int trip, ret; - int temperature; + struct thermal_trip trip; + int trip_id, ret; =20 - if (!tz->ops->get_trip_hyst) - return -EPERM; - - if (sscanf(attr->attr.name, "trip_point_%d_hyst", &trip) !=3D 1) + if (sscanf(attr->attr.name, "trip_point_%d_hyst", &trip_id) !=3D 1) return -EINVAL; =20 - ret =3D tz->ops->get_trip_hyst(tz, trip, &temperature); + ret =3D thermal_zone_get_trip(tz, trip_id, &trip); + if (ret) + return ret; =20 - return ret ? ret : sprintf(buf, "%d\n", temperature); + return ret ? ret : sprintf(buf, "%d\n", trip.hysteresis); } =20 static ssize_t --=20 2.34.1