From a6ff3c0021468721b96e84892a8cae24bde8d65f Mon Sep 17 00:00:00 2001 From: Daniel Lezcano Date: Wed, 1 Mar 2023 21:14:29 +0100 Subject: thermal/core: Add a thermal zone 'devdata' accessor The thermal zone device structure is exposed to the different drivers and obviously they access the internals while that should be restricted to the core thermal code. In order to self-encapsulate the thermal core code, we need to prevent the drivers accessing directly the thermal zone structure and provide accessor functions to deal with. Provide an accessor to the 'devdata' structure and make use of it in the different drivers. No functional changes intended. Signed-off-by: Daniel Lezcano Acked-by: Rafael J. Wysocki Acked-by: Mark Brown Signed-off-by: Rafael J. Wysocki --- include/linux/thermal.h | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'include/linux/thermal.h') diff --git a/include/linux/thermal.h b/include/linux/thermal.h index 2bb4bf33f4f3..7dbb5712434c 100644 --- a/include/linux/thermal.h +++ b/include/linux/thermal.h @@ -365,6 +365,8 @@ thermal_zone_device_register_with_trips(const char *, struct thermal_trip *, int void *, struct thermal_zone_device_ops *, struct thermal_zone_params *, int, int); +void *thermal_zone_device_priv(struct thermal_zone_device *tzd); + int thermal_zone_bind_cooling_device(struct thermal_zone_device *, int, struct thermal_cooling_device *, unsigned long, unsigned long, @@ -436,6 +438,11 @@ static inline int thermal_zone_get_offset( struct thermal_zone_device *tz) { return -ENODEV; } +static inline void *thermal_zone_device_priv(struct thermal_zone_device *tz) +{ + return NULL; +} + static inline int thermal_zone_device_enable(struct thermal_zone_device *tz) { return -ENODEV; } -- cgit v1.2.3-70-g09d2 From 072e35c98806100182c0a7263cf4cba09ce43463 Mon Sep 17 00:00:00 2001 From: Daniel Lezcano Date: Wed, 1 Mar 2023 21:14:38 +0100 Subject: thermal/core: Add thermal_zone_device structure 'type' accessor The thermal zone device structure is exposed via the exported thermal.h header. This structure should stay private the thermal core code. In order to encapsulate the structure, let's add an accessor to get the 'type' of the thermal zone. Signed-off-by: Daniel Lezcano Signed-off-by: Rafael J. Wysocki --- drivers/thermal/thermal_core.c | 6 ++++++ include/linux/thermal.h | 6 ++++++ 2 files changed, 12 insertions(+) (limited to 'include/linux/thermal.h') diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c index 8a0cdabccc7d..fa1c17529018 100644 --- a/drivers/thermal/thermal_core.c +++ b/drivers/thermal/thermal_core.c @@ -1383,6 +1383,12 @@ void *thermal_zone_device_priv(struct thermal_zone_device *tzd) } EXPORT_SYMBOL_GPL(thermal_zone_device_priv); +const char *thermal_zone_device_type(struct thermal_zone_device *tzd) +{ + return tzd->type; +} +EXPORT_SYMBOL_GPL(thermal_zone_device_type); + /** * thermal_zone_device_unregister - removes the registered thermal zone device * @tz: the thermal zone device to remove diff --git a/include/linux/thermal.h b/include/linux/thermal.h index 7dbb5712434c..21686e676b3d 100644 --- a/include/linux/thermal.h +++ b/include/linux/thermal.h @@ -366,6 +366,7 @@ thermal_zone_device_register_with_trips(const char *, struct thermal_trip *, int struct thermal_zone_params *, int, int); void *thermal_zone_device_priv(struct thermal_zone_device *tzd); +const char *thermal_zone_device_type(struct thermal_zone_device *tzd); int thermal_zone_bind_cooling_device(struct thermal_zone_device *, int, struct thermal_cooling_device *, @@ -443,6 +444,11 @@ static inline void *thermal_zone_device_priv(struct thermal_zone_device *tz) return NULL; } +static inline const char *thermal_zone_device_type(struct thermal_zone_device *tzd) +{ + return NULL; +} + static inline int thermal_zone_device_enable(struct thermal_zone_device *tz) { return -ENODEV; } -- cgit v1.2.3-70-g09d2 From 3034f859b90d49ee661fad4d23593589d0d37779 Mon Sep 17 00:00:00 2001 From: Daniel Lezcano Date: Wed, 1 Mar 2023 21:14:40 +0100 Subject: thermal: Add a thermal zone id accessor In order to get the thermal zone id but without directly accessing the thermal zone device structure, add an accessor. Use the accessor in the hwmon_scmi and acpi_thermal. No functional change intented. Signed-off-by: Daniel Lezcano Acked-by: Guenter Roeck Acked-by: Rafael J. Wysocki Signed-off-by: Rafael J. Wysocki --- drivers/acpi/thermal.c | 2 +- drivers/hwmon/scmi-hwmon.c | 2 +- drivers/thermal/thermal_core.c | 6 ++++++ include/linux/thermal.h | 6 ++++++ 4 files changed, 14 insertions(+), 2 deletions(-) (limited to 'include/linux/thermal.h') diff --git a/drivers/acpi/thermal.c b/drivers/acpi/thermal.c index 392b73b3e269..255efa73ed70 100644 --- a/drivers/acpi/thermal.c +++ b/drivers/acpi/thermal.c @@ -842,7 +842,7 @@ static int acpi_thermal_register_thermal_zone(struct acpi_thermal *tz) goto acpi_bus_detach; dev_info(&tz->device->dev, "registered as thermal_zone%d\n", - tz->thermal_zone->id); + thermal_zone_device_id(tz->thermal_zone)); return 0; diff --git a/drivers/hwmon/scmi-hwmon.c b/drivers/hwmon/scmi-hwmon.c index 046ac157749d..364199b332c0 100644 --- a/drivers/hwmon/scmi-hwmon.c +++ b/drivers/hwmon/scmi-hwmon.c @@ -220,7 +220,7 @@ static int scmi_thermal_sensor_register(struct device *dev, sensor->name); } else { dev_dbg(dev, "Sensor '%s' attached to thermal zone ID:%d\n", - sensor->name, tzd->id); + sensor->name, thermal_zone_device_id(tzd)); } return 0; diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c index fa1c17529018..5ae72f314683 100644 --- a/drivers/thermal/thermal_core.c +++ b/drivers/thermal/thermal_core.c @@ -1389,6 +1389,12 @@ const char *thermal_zone_device_type(struct thermal_zone_device *tzd) } EXPORT_SYMBOL_GPL(thermal_zone_device_type); +int thermal_zone_device_id(struct thermal_zone_device *tzd) +{ + return tzd->id; +} +EXPORT_SYMBOL_GPL(thermal_zone_device_id); + /** * thermal_zone_device_unregister - removes the registered thermal zone device * @tz: the thermal zone device to remove diff --git a/include/linux/thermal.h b/include/linux/thermal.h index 21686e676b3d..eb80cee4f64f 100644 --- a/include/linux/thermal.h +++ b/include/linux/thermal.h @@ -367,6 +367,7 @@ thermal_zone_device_register_with_trips(const char *, struct thermal_trip *, int void *thermal_zone_device_priv(struct thermal_zone_device *tzd); const char *thermal_zone_device_type(struct thermal_zone_device *tzd); +int thermal_zone_device_id(struct thermal_zone_device *tzd); int thermal_zone_bind_cooling_device(struct thermal_zone_device *, int, struct thermal_cooling_device *, @@ -449,6 +450,11 @@ static inline const char *thermal_zone_device_type(struct thermal_zone_device *t return NULL; } +static inline int thermal_zone_device_id(struct thermal_zone_device *tzd) +{ + return -ENODEV; +} + static inline int thermal_zone_device_enable(struct thermal_zone_device *tz) { return -ENODEV; } -- cgit v1.2.3-70-g09d2 From 790930f44289c8209c57461b2db499fcc702e0b3 Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Fri, 17 Mar 2023 18:01:26 +0100 Subject: thermal: core: Introduce thermal_cooling_device_update() Introduce a core thermal API function, thermal_cooling_device_update(), for updating the max_state value for a cooling device and rearranging its statistics in sysfs after a possible change of its ->get_max_state() callback return value. That callback is now invoked only once, during cooling device registration, to populate the max_state field in the cooling device object, so if its return value changes, it needs to be invoked again and the new return value needs to be stored as max_state. Moreover, the statistics presented in sysfs need to be rearranged in general, because there may not be enough room in them to store data for all of the possible states (in the case when max_state grows). The new function takes care of that (and some other minor things related to it), but some extra locking and lockdep annotations are added in several places too to protect against crashes in the cases when the statistics are not present or when a stale max_state value might be used by sysfs attributes. Note that the actual user of the new function will be added separately. Link: https://lore.kernel.org/linux-pm/53ec1f06f61c984100868926f282647e57ecfb2d.camel@intel.com/ Signed-off-by: Rafael J. Wysocki Tested-by: Zhang Rui Reviewed-by: Zhang Rui --- drivers/thermal/thermal_core.c | 83 ++++++++++++++++++++++++++++++++++++++++- drivers/thermal/thermal_core.h | 2 + drivers/thermal/thermal_sysfs.c | 74 +++++++++++++++++++++++++++++++----- include/linux/thermal.h | 1 + 4 files changed, 150 insertions(+), 10 deletions(-) (limited to 'include/linux/thermal.h') diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c index 8894342540f1..cfd4c1afeae7 100644 --- a/drivers/thermal/thermal_core.c +++ b/drivers/thermal/thermal_core.c @@ -613,6 +613,7 @@ int thermal_zone_bind_cooling_device(struct thermal_zone_device *tz, struct thermal_instance *pos; struct thermal_zone_device *pos1; struct thermal_cooling_device *pos2; + bool upper_no_limit; int result; if (trip >= tz->num_trips || trip < 0) @@ -632,7 +633,13 @@ int thermal_zone_bind_cooling_device(struct thermal_zone_device *tz, /* lower default 0, upper default max_state */ lower = lower == THERMAL_NO_LIMIT ? 0 : lower; - upper = upper == THERMAL_NO_LIMIT ? cdev->max_state : upper; + + if (upper == THERMAL_NO_LIMIT) { + upper = cdev->max_state; + upper_no_limit = true; + } else { + upper_no_limit = false; + } if (lower > upper || upper > cdev->max_state) return -EINVAL; @@ -644,6 +651,7 @@ int thermal_zone_bind_cooling_device(struct thermal_zone_device *tz, dev->cdev = cdev; dev->trip = trip; dev->upper = upper; + dev->upper_no_limit = upper_no_limit; dev->lower = lower; dev->target = THERMAL_NO_TARGET; dev->weight = weight; @@ -1057,6 +1065,79 @@ static bool thermal_cooling_device_present(struct thermal_cooling_device *cdev) return false; } +/** + * thermal_cooling_device_update - Update a cooling device object + * @cdev: Target cooling device. + * + * Update @cdev to reflect a change of the underlying hardware or platform. + * + * Must be called when the maximum cooling state of @cdev becomes invalid and so + * its .get_max_state() callback needs to be run to produce the new maximum + * cooling state value. + */ +void thermal_cooling_device_update(struct thermal_cooling_device *cdev) +{ + struct thermal_instance *ti; + unsigned long state; + + if (IS_ERR_OR_NULL(cdev)) + return; + + /* + * Hold thermal_list_lock throughout the update to prevent the device + * from going away while being updated. + */ + mutex_lock(&thermal_list_lock); + + if (!thermal_cooling_device_present(cdev)) + goto unlock_list; + + /* + * Update under the cdev lock to prevent the state from being set beyond + * the new limit concurrently. + */ + mutex_lock(&cdev->lock); + + if (cdev->ops->get_max_state(cdev, &cdev->max_state)) + goto unlock; + + thermal_cooling_device_stats_reinit(cdev); + + list_for_each_entry(ti, &cdev->thermal_instances, cdev_node) { + if (ti->upper == cdev->max_state) + continue; + + if (ti->upper < cdev->max_state) { + if (ti->upper_no_limit) + ti->upper = cdev->max_state; + + continue; + } + + ti->upper = cdev->max_state; + if (ti->lower > ti->upper) + ti->lower = ti->upper; + + if (ti->target == THERMAL_NO_TARGET) + continue; + + if (ti->target > ti->upper) + ti->target = ti->upper; + } + + if (cdev->ops->get_cur_state(cdev, &state) || state > cdev->max_state) + goto unlock; + + thermal_cooling_device_stats_update(cdev, state); + +unlock: + mutex_unlock(&cdev->lock); + +unlock_list: + mutex_unlock(&thermal_list_lock); +} +EXPORT_SYMBOL_GPL(thermal_cooling_device_update); + static void __unbind(struct thermal_zone_device *tz, int mask, struct thermal_cooling_device *cdev) { diff --git a/drivers/thermal/thermal_core.h b/drivers/thermal/thermal_core.h index 7af54382e915..3d4a787c6b28 100644 --- a/drivers/thermal/thermal_core.h +++ b/drivers/thermal/thermal_core.h @@ -101,6 +101,7 @@ struct thermal_instance { struct list_head tz_node; /* node in tz->thermal_instances */ struct list_head cdev_node; /* node in cdev->thermal_instances */ unsigned int weight; /* The weight of the cooling device */ + bool upper_no_limit; }; #define to_thermal_zone(_dev) \ @@ -127,6 +128,7 @@ int thermal_zone_create_device_groups(struct thermal_zone_device *, int); void thermal_zone_destroy_device_groups(struct thermal_zone_device *); void thermal_cooling_device_setup_sysfs(struct thermal_cooling_device *); void thermal_cooling_device_destroy_sysfs(struct thermal_cooling_device *cdev); +void thermal_cooling_device_stats_reinit(struct thermal_cooling_device *cdev); /* used only at binding time */ ssize_t trip_point_show(struct device *, struct device_attribute *, char *); ssize_t weight_show(struct device *, struct device_attribute *, char *); diff --git a/drivers/thermal/thermal_sysfs.c b/drivers/thermal/thermal_sysfs.c index cef860deaf91..a4aba7b8bb8b 100644 --- a/drivers/thermal/thermal_sysfs.c +++ b/drivers/thermal/thermal_sysfs.c @@ -685,6 +685,8 @@ void thermal_cooling_device_stats_update(struct thermal_cooling_device *cdev, { struct cooling_dev_stats *stats = cdev->stats; + lockdep_assert_held(&cdev->lock); + if (!stats) return; @@ -706,13 +708,22 @@ static ssize_t total_trans_show(struct device *dev, struct device_attribute *attr, char *buf) { struct thermal_cooling_device *cdev = to_cooling_device(dev); - struct cooling_dev_stats *stats = cdev->stats; - int ret; + struct cooling_dev_stats *stats; + int ret = 0; + + mutex_lock(&cdev->lock); + + stats = cdev->stats; + if (!stats) + goto unlock; spin_lock(&stats->lock); ret = sprintf(buf, "%u\n", stats->total_trans); spin_unlock(&stats->lock); +unlock: + mutex_unlock(&cdev->lock); + return ret; } @@ -721,11 +732,18 @@ time_in_state_ms_show(struct device *dev, struct device_attribute *attr, char *buf) { struct thermal_cooling_device *cdev = to_cooling_device(dev); - struct cooling_dev_stats *stats = cdev->stats; + struct cooling_dev_stats *stats; ssize_t len = 0; int i; + mutex_lock(&cdev->lock); + + stats = cdev->stats; + if (!stats) + goto unlock; + spin_lock(&stats->lock); + update_time_in_state(stats); for (i = 0; i <= cdev->max_state; i++) { @@ -734,6 +752,9 @@ time_in_state_ms_show(struct device *dev, struct device_attribute *attr, } spin_unlock(&stats->lock); +unlock: + mutex_unlock(&cdev->lock); + return len; } @@ -742,8 +763,16 @@ reset_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct thermal_cooling_device *cdev = to_cooling_device(dev); - struct cooling_dev_stats *stats = cdev->stats; - int i, states = cdev->max_state + 1; + struct cooling_dev_stats *stats; + int i, states; + + mutex_lock(&cdev->lock); + + stats = cdev->stats; + if (!stats) + goto unlock; + + states = cdev->max_state + 1; spin_lock(&stats->lock); @@ -757,6 +786,9 @@ reset_store(struct device *dev, struct device_attribute *attr, const char *buf, spin_unlock(&stats->lock); +unlock: + mutex_unlock(&cdev->lock); + return count; } @@ -764,10 +796,18 @@ static ssize_t trans_table_show(struct device *dev, struct device_attribute *attr, char *buf) { struct thermal_cooling_device *cdev = to_cooling_device(dev); - struct cooling_dev_stats *stats = cdev->stats; + struct cooling_dev_stats *stats; ssize_t len = 0; int i, j; + mutex_lock(&cdev->lock); + + stats = cdev->stats; + if (!stats) { + len = -ENODATA; + goto unlock; + } + len += snprintf(buf + len, PAGE_SIZE - len, " From : To\n"); len += snprintf(buf + len, PAGE_SIZE - len, " : "); for (i = 0; i <= cdev->max_state; i++) { @@ -775,8 +815,10 @@ static ssize_t trans_table_show(struct device *dev, break; len += snprintf(buf + len, PAGE_SIZE - len, "state%2u ", i); } - if (len >= PAGE_SIZE) - return PAGE_SIZE; + if (len >= PAGE_SIZE) { + len = PAGE_SIZE; + goto unlock; + } len += snprintf(buf + len, PAGE_SIZE - len, "\n"); @@ -799,8 +841,12 @@ static ssize_t trans_table_show(struct device *dev, if (len >= PAGE_SIZE) { pr_warn_once("Thermal transition table exceeds PAGE_SIZE. Disabling\n"); - return -EFBIG; + len = -EFBIG; } + +unlock: + mutex_unlock(&cdev->lock); + return len; } @@ -830,6 +876,8 @@ static void cooling_device_stats_setup(struct thermal_cooling_device *cdev) unsigned long states = cdev->max_state + 1; int var; + lockdep_assert_held(&cdev->lock); + var = sizeof(*stats); var += sizeof(*stats->time_in_state) * states; var += sizeof(*stats->trans_table) * states * states; @@ -855,6 +903,8 @@ out: static void cooling_device_stats_destroy(struct thermal_cooling_device *cdev) { + lockdep_assert_held(&cdev->lock); + kfree(cdev->stats); cdev->stats = NULL; } @@ -879,6 +929,12 @@ void thermal_cooling_device_destroy_sysfs(struct thermal_cooling_device *cdev) cooling_device_stats_destroy(cdev); } +void thermal_cooling_device_stats_reinit(struct thermal_cooling_device *cdev) +{ + cooling_device_stats_destroy(cdev); + cooling_device_stats_setup(cdev); +} + /* these helper will be used only at the time of bindig */ ssize_t trip_point_show(struct device *dev, struct device_attribute *attr, char *buf) diff --git a/include/linux/thermal.h b/include/linux/thermal.h index 2bb4bf33f4f3..13c6aaed18df 100644 --- a/include/linux/thermal.h +++ b/include/linux/thermal.h @@ -384,6 +384,7 @@ devm_thermal_of_cooling_device_register(struct device *dev, struct device_node *np, char *type, void *devdata, const struct thermal_cooling_device_ops *ops); +void thermal_cooling_device_update(struct thermal_cooling_device *); void thermal_cooling_device_unregister(struct thermal_cooling_device *); struct thermal_zone_device *thermal_zone_get_zone_by_name(const char *name); int thermal_zone_get_temp(struct thermal_zone_device *tz, int *temp); -- cgit v1.2.3-70-g09d2 From ded2d383b1b441f380552897791ffb85a1377f08 Mon Sep 17 00:00:00 2001 From: Zhang Rui Date: Thu, 30 Mar 2023 18:45:26 +0800 Subject: thermal/core: Remove thermal_bind_params structure Remove struct thermal_bind_params because no one is using it for thermal binding now. Signed-off-by: Zhang Rui Signed-off-by: Daniel Lezcano Link: https://lore.kernel.org/r/20230330104526.3196-1-rui.zhang@intel.com --- Documentation/driver-api/thermal/sysfs-api.rst | 40 -------- drivers/thermal/thermal_core.c | 129 +++---------------------- include/linux/thermal.h | 38 -------- 3 files changed, 11 insertions(+), 196 deletions(-) (limited to 'include/linux/thermal.h') diff --git a/Documentation/driver-api/thermal/sysfs-api.rst b/Documentation/driver-api/thermal/sysfs-api.rst index 2e0f79a9e2ee..6c1175c6afba 100644 --- a/Documentation/driver-api/thermal/sysfs-api.rst +++ b/Documentation/driver-api/thermal/sysfs-api.rst @@ -304,42 +304,6 @@ temperature) and throttle appropriate devices. 1.4 Thermal Zone Parameters --------------------------- - :: - - struct thermal_bind_params - - This structure defines the following parameters that are used to bind - a zone with a cooling device for a particular trip point. - - .cdev: - The cooling device pointer - .weight: - The 'influence' of a particular cooling device on this - zone. This is relative to the rest of the cooling - devices. For example, if all cooling devices have a - weight of 1, then they all contribute the same. You can - use percentages if you want, but it's not mandatory. A - weight of 0 means that this cooling device doesn't - contribute to the cooling of this zone unless all cooling - devices have a weight of 0. If all weights are 0, then - they all contribute the same. - .trip_mask: - This is a bit mask that gives the binding relation between - this thermal zone and cdev, for a particular trip point. - If nth bit is set, then the cdev and thermal zone are bound - for trip point n. - .binding_limits: - This is an array of cooling state limits. Must have - exactly 2 * thermal_zone.number_of_trip_points. It is an - array consisting of tuples of - state limits. Each trip will be associated with one state - limit tuple when binding. A NULL pointer means - on all trips. - These limits are used when binding a cdev to a trip point. - .match: - This call back returns success(0) if the 'tz and cdev' need to - be bound, as per platform data. - :: struct thermal_zone_params @@ -357,10 +321,6 @@ temperature) and throttle appropriate devices. will be created. when no_hwmon == true, nothing will be done. In case the thermal_zone_params is NULL, the hwmon interface will be created (for backward compatibility). - .num_tbps: - Number of thermal_bind_params entries for this zone - .tbp: - thermal_bind_params entries 2. sysfs attributes structure ============================= diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c index d02470a4bdb1..237430f1b565 100644 --- a/drivers/thermal/thermal_core.c +++ b/drivers/thermal/thermal_core.c @@ -794,62 +794,16 @@ void print_bind_err_msg(struct thermal_zone_device *tz, tz->type, cdev->type, ret); } -static void __bind(struct thermal_zone_device *tz, int mask, - struct thermal_cooling_device *cdev, - unsigned long *limits, - unsigned int weight) -{ - int i, ret; - - for (i = 0; i < tz->num_trips; i++) { - if (mask & (1 << i)) { - unsigned long upper, lower; - - upper = THERMAL_NO_LIMIT; - lower = THERMAL_NO_LIMIT; - if (limits) { - lower = limits[i * 2]; - upper = limits[i * 2 + 1]; - } - ret = thermal_zone_bind_cooling_device(tz, i, cdev, - upper, lower, - weight); - if (ret) - print_bind_err_msg(tz, cdev, ret); - } - } -} - static void bind_cdev(struct thermal_cooling_device *cdev) { - int i, ret; - const struct thermal_zone_params *tzp; + int ret; struct thermal_zone_device *pos = NULL; list_for_each_entry(pos, &thermal_tz_list, node) { - if (!pos->tzp && !pos->ops->bind) - continue; - if (pos->ops->bind) { ret = pos->ops->bind(pos, cdev); if (ret) print_bind_err_msg(pos, cdev, ret); - continue; - } - - tzp = pos->tzp; - if (!tzp || !tzp->tbp) - continue; - - for (i = 0; i < tzp->num_tbps; i++) { - if (tzp->tbp[i].cdev || !tzp->tbp[i].match) - continue; - if (tzp->tbp[i].match(pos, cdev)) - continue; - tzp->tbp[i].cdev = cdev; - __bind(pos, tzp->tbp[i].trip_mask, cdev, - tzp->tbp[i].binding_limits, - tzp->tbp[i].weight); } } } @@ -1134,16 +1088,6 @@ unlock_list: } EXPORT_SYMBOL_GPL(thermal_cooling_device_update); -static void __unbind(struct thermal_zone_device *tz, int mask, - struct thermal_cooling_device *cdev) -{ - int i; - - for (i = 0; i < tz->num_trips; i++) - if (mask & (1 << i)) - thermal_zone_unbind_cooling_device(tz, i, cdev); -} - /** * thermal_cooling_device_unregister - removes a thermal cooling device * @cdev: the thermal cooling device to remove. @@ -1153,8 +1097,6 @@ static void __unbind(struct thermal_zone_device *tz, int mask, */ void thermal_cooling_device_unregister(struct thermal_cooling_device *cdev) { - int i; - const struct thermal_zone_params *tzp; struct thermal_zone_device *tz; if (!cdev) @@ -1171,21 +1113,8 @@ void thermal_cooling_device_unregister(struct thermal_cooling_device *cdev) /* Unbind all thermal zones associated with 'this' cdev */ list_for_each_entry(tz, &thermal_tz_list, node) { - if (tz->ops->unbind) { + if (tz->ops->unbind) tz->ops->unbind(tz, cdev); - continue; - } - - if (!tz->tzp || !tz->tzp->tbp) - continue; - - tzp = tz->tzp; - for (i = 0; i < tzp->num_tbps; i++) { - if (tzp->tbp[i].cdev == cdev) { - __unbind(tz, tzp->tbp[i].trip_mask, cdev); - tzp->tbp[i].cdev = NULL; - } - } } mutex_unlock(&thermal_list_lock); @@ -1196,41 +1125,20 @@ EXPORT_SYMBOL_GPL(thermal_cooling_device_unregister); static void bind_tz(struct thermal_zone_device *tz) { - int i, ret; + int ret; struct thermal_cooling_device *pos = NULL; - const struct thermal_zone_params *tzp = tz->tzp; - if (!tzp && !tz->ops->bind) + if (!tz->ops->bind) return; mutex_lock(&thermal_list_lock); - /* If there is ops->bind, try to use ops->bind */ - if (tz->ops->bind) { - list_for_each_entry(pos, &thermal_cdev_list, node) { - ret = tz->ops->bind(tz, pos); - if (ret) - print_bind_err_msg(tz, pos, ret); - } - goto exit; - } - - if (!tzp || !tzp->tbp) - goto exit; - list_for_each_entry(pos, &thermal_cdev_list, node) { - for (i = 0; i < tzp->num_tbps; i++) { - if (tzp->tbp[i].cdev || !tzp->tbp[i].match) - continue; - if (tzp->tbp[i].match(tz, pos)) - continue; - tzp->tbp[i].cdev = pos; - __bind(tz, tzp->tbp[i].trip_mask, pos, - tzp->tbp[i].binding_limits, - tzp->tbp[i].weight); - } + ret = tz->ops->bind(tz, pos); + if (ret) + print_bind_err_msg(tz, pos, ret); } -exit: + mutex_unlock(&thermal_list_lock); } @@ -1487,15 +1395,13 @@ EXPORT_SYMBOL_GPL(thermal_zone_device_id); */ void thermal_zone_device_unregister(struct thermal_zone_device *tz) { - int i, tz_id; - const struct thermal_zone_params *tzp; + int tz_id; struct thermal_cooling_device *cdev; struct thermal_zone_device *pos = NULL; if (!tz) return; - tzp = tz->tzp; tz_id = tz->id; mutex_lock(&thermal_list_lock); @@ -1510,22 +1416,9 @@ void thermal_zone_device_unregister(struct thermal_zone_device *tz) list_del(&tz->node); /* Unbind all cdevs associated with 'this' thermal zone */ - list_for_each_entry(cdev, &thermal_cdev_list, node) { - if (tz->ops->unbind) { + list_for_each_entry(cdev, &thermal_cdev_list, node) + if (tz->ops->unbind) tz->ops->unbind(tz, cdev); - continue; - } - - if (!tzp || !tzp->tbp) - break; - - for (i = 0; i < tzp->num_tbps; i++) { - if (tzp->tbp[i].cdev == cdev) { - __unbind(tz, tzp->tbp[i].trip_mask, cdev); - tzp->tbp[i].cdev = NULL; - } - } - } mutex_unlock(&thermal_list_lock); diff --git a/include/linux/thermal.h b/include/linux/thermal.h index fef625f799ae..ab7460bfdcf6 100644 --- a/include/linux/thermal.h +++ b/include/linux/thermal.h @@ -207,41 +207,6 @@ struct thermal_governor { struct list_head governor_list; }; -/* Structure that holds binding parameters for a zone */ -struct thermal_bind_params { - struct thermal_cooling_device *cdev; - - /* - * This is a measure of 'how effectively these devices can - * cool 'this' thermal zone. It shall be determined by - * platform characterization. This value is relative to the - * rest of the weights so a cooling device whose weight is - * double that of another cooling device is twice as - * effective. See Documentation/driver-api/thermal/sysfs-api.rst for more - * information. - */ - int weight; - - /* - * This is a bit mask that gives the binding relation between this - * thermal zone and cdev, for a particular trip point. - * See Documentation/driver-api/thermal/sysfs-api.rst for more information. - */ - int trip_mask; - - /* - * This is an array of cooling state limits. Must have exactly - * 2 * thermal_zone.number_of_trip_points. It is an array consisting - * of tuples of state limits. Each trip - * will be associated with one state limit tuple when binding. - * A NULL pointer means - * on all trips. - */ - unsigned long *binding_limits; - int (*match) (struct thermal_zone_device *tz, - struct thermal_cooling_device *cdev); -}; - /* Structure to define Thermal Zone parameters */ struct thermal_zone_params { char governor_name[THERMAL_NAME_LENGTH]; @@ -253,9 +218,6 @@ struct thermal_zone_params { */ bool no_hwmon; - int num_tbps; /* Number of tbp entries */ - struct thermal_bind_params *tbp; - /* * Sustainable power (heat) that this thermal zone can dissipate in * mW -- cgit v1.2.3-70-g09d2 From ac614a9b4c35bf766dec40d73cbbc7f37c1734f7 Mon Sep 17 00:00:00 2001 From: Daniel Lezcano Date: Tue, 4 Apr 2023 09:51:36 +0200 Subject: thermal/of: Unexport unused OF functions The functions thermal_of_zone_register() and thermal_of_zone_unregister() are no longer needed from the drivers as the devm_ variant is always used. Make them static in the C file and remove their declaration from thermal.h Signed-off-by: Daniel Lezcano Link: https://lore.kernel.org/r/20230404075138.2914680-2-daniel.lezcano@linaro.org --- drivers/thermal/thermal_of.c | 8 +++----- include/linux/thermal.h | 17 ----------------- 2 files changed, 3 insertions(+), 22 deletions(-) (limited to 'include/linux/thermal.h') diff --git a/drivers/thermal/thermal_of.c b/drivers/thermal/thermal_of.c index ff4d12ef51bc..6fb14e521197 100644 --- a/drivers/thermal/thermal_of.c +++ b/drivers/thermal/thermal_of.c @@ -439,7 +439,7 @@ static int thermal_of_unbind(struct thermal_zone_device *tz, * * @tz: a pointer to the thermal zone structure */ -void thermal_of_zone_unregister(struct thermal_zone_device *tz) +static void thermal_of_zone_unregister(struct thermal_zone_device *tz) { struct thermal_trip *trips = tz->trips; struct thermal_zone_params *tzp = tz->tzp; @@ -451,7 +451,6 @@ void thermal_of_zone_unregister(struct thermal_zone_device *tz) kfree(tzp); kfree(ops); } -EXPORT_SYMBOL_GPL(thermal_of_zone_unregister); /** * thermal_of_zone_register - Register a thermal zone with device node @@ -473,8 +472,8 @@ EXPORT_SYMBOL_GPL(thermal_of_zone_unregister); * - ENOMEM: if one structure can not be allocated * - Other negative errors are returned by the underlying called functions */ -struct thermal_zone_device *thermal_of_zone_register(struct device_node *sensor, int id, void *data, - const struct thermal_zone_device_ops *ops) +static struct thermal_zone_device *thermal_of_zone_register(struct device_node *sensor, int id, void *data, + const struct thermal_zone_device_ops *ops) { struct thermal_zone_device *tz; struct thermal_trip *trips; @@ -550,7 +549,6 @@ out_kfree_of_ops: return ERR_PTR(ret); } -EXPORT_SYMBOL_GPL(thermal_of_zone_register); static void devm_thermal_of_zone_release(struct device *dev, void *res) { diff --git a/include/linux/thermal.h b/include/linux/thermal.h index ab7460bfdcf6..82ddb32f9876 100644 --- a/include/linux/thermal.h +++ b/include/linux/thermal.h @@ -259,25 +259,12 @@ struct thermal_zone_params { /* Function declarations */ #ifdef CONFIG_THERMAL_OF -struct thermal_zone_device *thermal_of_zone_register(struct device_node *sensor, int id, void *data, - const struct thermal_zone_device_ops *ops); - struct thermal_zone_device *devm_thermal_of_zone_register(struct device *dev, int id, void *data, const struct thermal_zone_device_ops *ops); -void thermal_of_zone_unregister(struct thermal_zone_device *tz); - void devm_thermal_of_zone_unregister(struct device *dev, struct thermal_zone_device *tz); -void thermal_of_zone_unregister(struct thermal_zone_device *tz); - #else -static inline -struct thermal_zone_device *thermal_of_zone_register(struct device_node *sensor, int id, void *data, - const struct thermal_zone_device_ops *ops) -{ - return ERR_PTR(-ENOTSUPP); -} static inline struct thermal_zone_device *devm_thermal_of_zone_register(struct device *dev, int id, void *data, @@ -286,10 +273,6 @@ struct thermal_zone_device *devm_thermal_of_zone_register(struct device *dev, in return ERR_PTR(-ENOTSUPP); } -static inline void thermal_of_zone_unregister(struct thermal_zone_device *tz) -{ -} - static inline void devm_thermal_of_zone_unregister(struct device *dev, struct thermal_zone_device *tz) { -- cgit v1.2.3-70-g09d2 From 7cefbaf081eb7c114299f7478ed4fa0d90ec90bb Mon Sep 17 00:00:00 2001 From: Daniel Lezcano Date: Wed, 19 Apr 2023 10:33:38 +0200 Subject: thermal: core: Encapsulate tz->device field There are still some drivers needing to play with the thermal zone device internals. That is not the best but until we can figure out if the information is really needed, let's encapsulate the field used in the thermal zone device structure, so we can move forward relocating the thermal zone device structure definition in the thermal framework private headers. Some drivers are accessing tz->device, that implies they need to have the knowledge of the thermal_zone_device structure but we want to self-encapsulate this structure and reduce the scope of the structure to the thermal core only. By adding this wrapper, these drivers won't need the thermal zone device structure definition and are no longer an obstacle to its relocation to the private thermal core headers. Signed-off-by: Daniel Lezcano Signed-off-by: Rafael J. Wysocki --- drivers/thermal/thermal_core.c | 6 ++++++ include/linux/thermal.h | 1 + 2 files changed, 7 insertions(+) (limited to 'include/linux/thermal.h') diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c index c5025aca22ee..842f678c1c3e 100644 --- a/drivers/thermal/thermal_core.c +++ b/drivers/thermal/thermal_core.c @@ -1398,6 +1398,12 @@ int thermal_zone_device_id(struct thermal_zone_device *tzd) } EXPORT_SYMBOL_GPL(thermal_zone_device_id); +struct device *thermal_zone_device(struct thermal_zone_device *tzd) +{ + return &tzd->device; +} +EXPORT_SYMBOL_GPL(thermal_zone_device); + /** * thermal_zone_device_unregister - removes the registered thermal zone device * @tz: the thermal zone device to remove diff --git a/include/linux/thermal.h b/include/linux/thermal.h index 82ddb32f9876..87837094d549 100644 --- a/include/linux/thermal.h +++ b/include/linux/thermal.h @@ -313,6 +313,7 @@ thermal_zone_device_register_with_trips(const char *, struct thermal_trip *, int void *thermal_zone_device_priv(struct thermal_zone_device *tzd); const char *thermal_zone_device_type(struct thermal_zone_device *tzd); int thermal_zone_device_id(struct thermal_zone_device *tzd); +struct device *thermal_zone_device(struct thermal_zone_device *tzd); int thermal_zone_bind_cooling_device(struct thermal_zone_device *, int, struct thermal_cooling_device *, -- cgit v1.2.3-70-g09d2