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5340f76472
In order to allow thermal zone creators to specify the writability of trip point temperature and hysteresis on a per-trip basis, add a flags field to struct thermal_trip and define flags to represent the desired trip properties. Also make thermal_zone_device_register_with_trips() set the THERMAL_TRIP_FLAG_RW_TEMP flag for all trips covered by the writable trips mask passed to it and modify the thermal sysfs code to look at the trip flags instead of using the writable trips mask directly or checking the presence of the .set_trip_hyst() zone callback. Additionally, make trip_point_temp_store() and trip_point_hyst_store() fail with an error code if the trip passed to one of them has THERMAL_TRIP_FLAG_RW_TEMP or THERMAL_TRIP_FLAG_RW_HYST, respectively, clear in its flags. No intentional functional impact. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
158 lines
5.6 KiB
C
158 lines
5.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* thermal_core.h
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*
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* Copyright (C) 2012 Intel Corp
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* Author: Durgadoss R <durgadoss.r@intel.com>
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*/
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#ifndef __THERMAL_CORE_H__
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#define __THERMAL_CORE_H__
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#include <linux/device.h>
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#include <linux/thermal.h>
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#include "thermal_netlink.h"
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#include "thermal_debugfs.h"
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/* Default Thermal Governor */
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#if defined(CONFIG_THERMAL_DEFAULT_GOV_STEP_WISE)
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#define DEFAULT_THERMAL_GOVERNOR "step_wise"
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#elif defined(CONFIG_THERMAL_DEFAULT_GOV_FAIR_SHARE)
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#define DEFAULT_THERMAL_GOVERNOR "fair_share"
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#elif defined(CONFIG_THERMAL_DEFAULT_GOV_USER_SPACE)
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#define DEFAULT_THERMAL_GOVERNOR "user_space"
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#elif defined(CONFIG_THERMAL_DEFAULT_GOV_POWER_ALLOCATOR)
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#define DEFAULT_THERMAL_GOVERNOR "power_allocator"
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#elif defined(CONFIG_THERMAL_DEFAULT_GOV_BANG_BANG)
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#define DEFAULT_THERMAL_GOVERNOR "bang_bang"
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#endif
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/* Initial state of a cooling device during binding */
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#define THERMAL_NO_TARGET -1UL
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/* Init section thermal table */
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extern struct thermal_governor *__governor_thermal_table[];
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extern struct thermal_governor *__governor_thermal_table_end[];
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#define THERMAL_TABLE_ENTRY(table, name) \
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static typeof(name) *__thermal_table_entry_##name \
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__used __section("__" #table "_thermal_table") = &name
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#define THERMAL_GOVERNOR_DECLARE(name) THERMAL_TABLE_ENTRY(governor, name)
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#define for_each_governor_table(__governor) \
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for (__governor = __governor_thermal_table; \
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__governor < __governor_thermal_table_end; \
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__governor++)
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int for_each_thermal_zone(int (*cb)(struct thermal_zone_device *, void *),
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void *);
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int for_each_thermal_cooling_device(int (*cb)(struct thermal_cooling_device *,
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void *), void *);
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int for_each_thermal_governor(int (*cb)(struct thermal_governor *, void *),
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void *thermal_governor);
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struct thermal_zone_device *thermal_zone_get_by_id(int id);
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struct thermal_attr {
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struct device_attribute attr;
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char name[THERMAL_NAME_LENGTH];
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};
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static inline bool cdev_is_power_actor(struct thermal_cooling_device *cdev)
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{
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return cdev->ops->get_requested_power && cdev->ops->state2power &&
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cdev->ops->power2state;
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}
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void thermal_cdev_update(struct thermal_cooling_device *);
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void __thermal_cdev_update(struct thermal_cooling_device *cdev);
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int get_tz_trend(struct thermal_zone_device *tz, const struct thermal_trip *trip);
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struct thermal_instance *
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get_thermal_instance(struct thermal_zone_device *tz,
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struct thermal_cooling_device *cdev,
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int trip);
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/*
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* This structure is used to describe the behavior of
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* a certain cooling device on a certain trip point
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* in a certain thermal zone
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*/
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struct thermal_instance {
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int id;
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char name[THERMAL_NAME_LENGTH];
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struct thermal_zone_device *tz;
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struct thermal_cooling_device *cdev;
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const struct thermal_trip *trip;
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bool initialized;
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unsigned long upper; /* Highest cooling state for this trip point */
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unsigned long lower; /* Lowest cooling state for this trip point */
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unsigned long target; /* expected cooling state */
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char attr_name[THERMAL_NAME_LENGTH];
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struct device_attribute attr;
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char weight_attr_name[THERMAL_NAME_LENGTH];
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struct device_attribute weight_attr;
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struct list_head tz_node; /* node in tz->thermal_instances */
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struct list_head cdev_node; /* node in cdev->thermal_instances */
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unsigned int weight; /* The weight of the cooling device */
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bool upper_no_limit;
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};
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#define to_thermal_zone(_dev) \
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container_of(_dev, struct thermal_zone_device, device)
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#define to_cooling_device(_dev) \
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container_of(_dev, struct thermal_cooling_device, device)
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int thermal_register_governor(struct thermal_governor *);
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void thermal_unregister_governor(struct thermal_governor *);
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int thermal_zone_device_set_policy(struct thermal_zone_device *, char *);
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int thermal_build_list_of_policies(char *buf);
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void __thermal_zone_device_update(struct thermal_zone_device *tz,
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enum thermal_notify_event event);
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void thermal_zone_device_critical_reboot(struct thermal_zone_device *tz);
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void thermal_governor_update_tz(struct thermal_zone_device *tz,
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enum thermal_notify_event reason);
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/* Helpers */
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#define for_each_trip(__tz, __trip) \
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for (__trip = __tz->trips; __trip - __tz->trips < __tz->num_trips; __trip++)
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void __thermal_zone_set_trips(struct thermal_zone_device *tz);
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int thermal_zone_trip_id(const struct thermal_zone_device *tz,
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const struct thermal_trip *trip);
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void thermal_zone_trip_updated(struct thermal_zone_device *tz,
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const struct thermal_trip *trip);
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int __thermal_zone_get_temp(struct thermal_zone_device *tz, int *temp);
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/* sysfs I/F */
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int thermal_zone_create_device_groups(struct thermal_zone_device *tz);
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void thermal_zone_destroy_device_groups(struct thermal_zone_device *);
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void thermal_cooling_device_setup_sysfs(struct thermal_cooling_device *);
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void thermal_cooling_device_destroy_sysfs(struct thermal_cooling_device *cdev);
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void thermal_cooling_device_stats_reinit(struct thermal_cooling_device *cdev);
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/* used only at binding time */
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ssize_t trip_point_show(struct device *, struct device_attribute *, char *);
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ssize_t weight_show(struct device *, struct device_attribute *, char *);
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ssize_t weight_store(struct device *, struct device_attribute *, const char *,
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size_t);
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#ifdef CONFIG_THERMAL_STATISTICS
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void thermal_cooling_device_stats_update(struct thermal_cooling_device *cdev,
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unsigned long new_state);
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#else
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static inline void
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thermal_cooling_device_stats_update(struct thermal_cooling_device *cdev,
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unsigned long new_state) {}
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#endif /* CONFIG_THERMAL_STATISTICS */
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/* device tree support */
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int thermal_zone_device_is_enabled(struct thermal_zone_device *tz);
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#endif /* __THERMAL_CORE_H__ */
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