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thermal: Remove netlink support
There are no users of netlink messages for thermal inside the kernel. Remove the code and adjust the documentation. Signed-off-by: Amit Kucheria <amit.kucheria@linaro.org> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Link: https://lore.kernel.org/r/8ff02cf62186c7a54fff325fad40a2e9ca3affa6.1571656014.git.amit.kucheria@linaro.org
This commit is contained in:
Amit Kucheria
Daniel Lezcano
parent
da73f9b898
commit
f96c8e5015
3 changed files with 7 additions and 131 deletions
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@ -725,24 +725,10 @@ method, the sys I/F structure will be built like this::
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|---temp1_input: 37000
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|---temp1_crit: 100000
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4. Event Notification
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4. Export Symbol APIs
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=====================
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The framework includes a simple notification mechanism, in the form of a
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netlink event. Netlink socket initialization is done during the _init_
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of the framework. Drivers which intend to use the notification mechanism
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just need to call thermal_generate_netlink_event() with two arguments viz
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(originator, event). The originator is a pointer to struct thermal_zone_device
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from where the event has been originated. An integer which represents the
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thermal zone device will be used in the message to identify the zone. The
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event will be one of:{THERMAL_AUX0, THERMAL_AUX1, THERMAL_CRITICAL,
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THERMAL_DEV_FAULT}. Notification can be sent when the current temperature
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crosses any of the configured thresholds.
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5. Export Symbol APIs
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=====================
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5.1. get_tz_trend
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4.1. get_tz_trend
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-----------------
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This function returns the trend of a thermal zone, i.e the rate of change
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@ -751,14 +737,14 @@ are supposed to implement the callback. If they don't, the thermal
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framework calculated the trend by comparing the previous and the current
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temperature values.
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5.2. get_thermal_instance
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4.2. get_thermal_instance
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-------------------------
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This function returns the thermal_instance corresponding to a given
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{thermal_zone, cooling_device, trip_point} combination. Returns NULL
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if such an instance does not exist.
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5.3. thermal_notify_framework
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4.3. thermal_notify_framework
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-----------------------------
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This function handles the trip events from sensor drivers. It starts
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@ -768,14 +754,14 @@ and does actual throttling for other trip points i.e ACTIVE and PASSIVE.
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The throttling policy is based on the configured platform data; if no
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platform data is provided, this uses the step_wise throttling policy.
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5.4. thermal_cdev_update
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4.4. thermal_cdev_update
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------------------------
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This function serves as an arbitrator to set the state of a cooling
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device. It sets the cooling device to the deepest cooling state if
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possible.
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6. thermal_emergency_poweroff
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5. thermal_emergency_poweroff
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=============================
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On an event of critical trip temperature crossing. Thermal framework
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@ -19,8 +19,6 @@
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#include <linux/reboot.h>
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#include <linux/string.h>
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#include <linux/of.h>
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#include <net/netlink.h>
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#include <net/genetlink.h>
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#include <linux/suspend.h>
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#define CREATE_TRACE_POINTS
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@ -1464,97 +1462,6 @@ exit:
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}
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EXPORT_SYMBOL_GPL(thermal_zone_get_zone_by_name);
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#ifdef CONFIG_NET
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static const struct genl_multicast_group thermal_event_mcgrps[] = {
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{ .name = THERMAL_GENL_MCAST_GROUP_NAME, },
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};
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static struct genl_family thermal_event_genl_family __ro_after_init = {
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.module = THIS_MODULE,
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.name = THERMAL_GENL_FAMILY_NAME,
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.version = THERMAL_GENL_VERSION,
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.maxattr = THERMAL_GENL_ATTR_MAX,
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.mcgrps = thermal_event_mcgrps,
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.n_mcgrps = ARRAY_SIZE(thermal_event_mcgrps),
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};
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int thermal_generate_netlink_event(struct thermal_zone_device *tz,
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enum events event)
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{
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struct sk_buff *skb;
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struct nlattr *attr;
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struct thermal_genl_event *thermal_event;
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void *msg_header;
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int size;
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int result;
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static unsigned int thermal_event_seqnum;
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if (!tz)
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return -EINVAL;
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/* allocate memory */
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size = nla_total_size(sizeof(struct thermal_genl_event)) +
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nla_total_size(0);
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skb = genlmsg_new(size, GFP_ATOMIC);
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if (!skb)
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return -ENOMEM;
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/* add the genetlink message header */
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msg_header = genlmsg_put(skb, 0, thermal_event_seqnum++,
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&thermal_event_genl_family, 0,
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THERMAL_GENL_CMD_EVENT);
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if (!msg_header) {
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nlmsg_free(skb);
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return -ENOMEM;
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}
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/* fill the data */
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attr = nla_reserve(skb, THERMAL_GENL_ATTR_EVENT,
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sizeof(struct thermal_genl_event));
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if (!attr) {
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nlmsg_free(skb);
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return -EINVAL;
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}
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thermal_event = nla_data(attr);
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if (!thermal_event) {
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nlmsg_free(skb);
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return -EINVAL;
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}
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memset(thermal_event, 0, sizeof(struct thermal_genl_event));
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thermal_event->orig = tz->id;
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thermal_event->event = event;
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/* send multicast genetlink message */
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genlmsg_end(skb, msg_header);
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result = genlmsg_multicast(&thermal_event_genl_family, skb, 0,
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0, GFP_ATOMIC);
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if (result)
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dev_err(&tz->device, "Failed to send netlink event:%d", result);
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return result;
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}
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EXPORT_SYMBOL_GPL(thermal_generate_netlink_event);
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static int __init genetlink_init(void)
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{
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return genl_register_family(&thermal_event_genl_family);
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}
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static void genetlink_exit(void)
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{
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genl_unregister_family(&thermal_event_genl_family);
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}
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#else /* !CONFIG_NET */
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static inline int genetlink_init(void) { return 0; }
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static inline void genetlink_exit(void) {}
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#endif /* !CONFIG_NET */
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static int thermal_pm_notify(struct notifier_block *nb,
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unsigned long mode, void *_unused)
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{
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@ -1607,13 +1514,9 @@ static int __init thermal_init(void)
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if (result)
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goto unregister_governors;
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result = genetlink_init();
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if (result)
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goto unregister_class;
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result = of_parse_thermal_zones();
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if (result)
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goto exit_netlink;
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goto unregister_class;
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result = register_pm_notifier(&thermal_pm_nb);
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if (result)
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@ -1622,8 +1525,6 @@ static int __init thermal_init(void)
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return 0;
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exit_netlink:
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genetlink_exit();
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unregister_class:
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class_unregister(&thermal_class);
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unregister_governors:
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@ -544,15 +544,4 @@ static inline void thermal_notify_framework(struct thermal_zone_device *tz,
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{ }
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#endif /* CONFIG_THERMAL */
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#if defined(CONFIG_NET) && IS_ENABLED(CONFIG_THERMAL)
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extern int thermal_generate_netlink_event(struct thermal_zone_device *tz,
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enum events event);
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#else
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static inline int thermal_generate_netlink_event(struct thermal_zone_device *tz,
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enum events event)
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{
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return 0;
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}
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#endif
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#endif /* __THERMAL_H__ */
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