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1// SPDX-License-Identifier: LGPL-2.1+2// Copyright (C) 2022, Linaro Ltd - Daniel Lezcano <daniel.lezcano@linaro.org>3#include <linux/netlink.h>4#include <stdio.h>5#include <stdlib.h>6#include <unistd.h>7 8 9#include <thermal.h>10#include "thermal_nl.h"11 12/*13 * Optimization: fill this array to tell which event we do want to pay14 * attention to. That happens at init time with the ops15 * structure. Each ops will enable the event and the general handler16 * will be able to discard the event if there is not ops associated17 * with it.18 */19static int enabled_ops[__THERMAL_GENL_EVENT_MAX];20 21static int handle_thermal_event(struct nl_msg *n, void *arg)22{23 struct nlmsghdr *nlh = nlmsg_hdr(n);24 struct genlmsghdr *genlhdr = genlmsg_hdr(nlh);25 struct nlattr *attrs[THERMAL_GENL_ATTR_MAX + 1];26 struct thermal_handler_param *thp = arg;27 struct thermal_events_ops *ops = &thp->th->ops->events;28 29 genlmsg_parse(nlh, 0, attrs, THERMAL_GENL_ATTR_MAX, NULL);30 31 arg = thp->arg;32 33 /*34 * This is an event we don't care of, bail out.35 */36 if (!enabled_ops[genlhdr->cmd])37 return THERMAL_SUCCESS;38 39 switch (genlhdr->cmd) {40 41 case THERMAL_GENL_EVENT_TZ_CREATE:42 return ops->tz_create(nla_get_string(attrs[THERMAL_GENL_ATTR_TZ_NAME]),43 nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_ID]), arg);44 45 case THERMAL_GENL_EVENT_TZ_DELETE:46 return ops->tz_delete(nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_ID]), arg);47 48 case THERMAL_GENL_EVENT_TZ_ENABLE:49 return ops->tz_enable(nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_ID]), arg);50 51 case THERMAL_GENL_EVENT_TZ_DISABLE:52 return ops->tz_disable(nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_ID]), arg);53 54 case THERMAL_GENL_EVENT_TZ_TRIP_CHANGE:55 return ops->trip_change(nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_ID]),56 nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_TRIP_ID]),57 nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_TRIP_TYPE]),58 nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_TRIP_TEMP]),59 nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_TRIP_HYST]), arg);60 61 case THERMAL_GENL_EVENT_TZ_TRIP_ADD:62 return ops->trip_add(nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_ID]),63 nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_TRIP_ID]),64 nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_TRIP_TYPE]),65 nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_TRIP_TEMP]),66 nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_TRIP_HYST]), arg);67 68 case THERMAL_GENL_EVENT_TZ_TRIP_DELETE:69 return ops->trip_delete(nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_ID]),70 nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_TRIP_ID]), arg);71 72 case THERMAL_GENL_EVENT_TZ_TRIP_UP:73 return ops->trip_high(nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_ID]),74 nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_TRIP_ID]),75 nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_TEMP]), arg);76 77 case THERMAL_GENL_EVENT_TZ_TRIP_DOWN:78 return ops->trip_low(nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_ID]),79 nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_TRIP_ID]),80 nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_TEMP]), arg);81 82 case THERMAL_GENL_EVENT_CDEV_ADD:83 return ops->cdev_add(nla_get_string(attrs[THERMAL_GENL_ATTR_CDEV_NAME]),84 nla_get_u32(attrs[THERMAL_GENL_ATTR_CDEV_ID]),85 nla_get_u32(attrs[THERMAL_GENL_ATTR_CDEV_MAX_STATE]), arg);86 87 case THERMAL_GENL_EVENT_CDEV_DELETE:88 return ops->cdev_delete(nla_get_u32(attrs[THERMAL_GENL_ATTR_CDEV_ID]), arg);89 90 case THERMAL_GENL_EVENT_CDEV_STATE_UPDATE:91 return ops->cdev_update(nla_get_u32(attrs[THERMAL_GENL_ATTR_CDEV_ID]),92 nla_get_u32(attrs[THERMAL_GENL_ATTR_CDEV_CUR_STATE]), arg);93 94 case THERMAL_GENL_EVENT_TZ_GOV_CHANGE:95 return ops->gov_change(nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_ID]),96 nla_get_string(attrs[THERMAL_GENL_ATTR_GOV_NAME]), arg);97 default:98 return -1;99 }100}101 102static void thermal_events_ops_init(struct thermal_events_ops *ops)103{104 enabled_ops[THERMAL_GENL_EVENT_TZ_CREATE] = !!ops->tz_create;105 enabled_ops[THERMAL_GENL_EVENT_TZ_DELETE] = !!ops->tz_delete;106 enabled_ops[THERMAL_GENL_EVENT_TZ_DISABLE] = !!ops->tz_disable;107 enabled_ops[THERMAL_GENL_EVENT_TZ_ENABLE] = !!ops->tz_enable;108 enabled_ops[THERMAL_GENL_EVENT_TZ_TRIP_UP] = !!ops->trip_high;109 enabled_ops[THERMAL_GENL_EVENT_TZ_TRIP_DOWN] = !!ops->trip_low;110 enabled_ops[THERMAL_GENL_EVENT_TZ_TRIP_CHANGE] = !!ops->trip_change;111 enabled_ops[THERMAL_GENL_EVENT_TZ_TRIP_ADD] = !!ops->trip_add;112 enabled_ops[THERMAL_GENL_EVENT_TZ_TRIP_DELETE] = !!ops->trip_delete;113 enabled_ops[THERMAL_GENL_EVENT_CDEV_ADD] = !!ops->cdev_add;114 enabled_ops[THERMAL_GENL_EVENT_CDEV_DELETE] = !!ops->cdev_delete;115 enabled_ops[THERMAL_GENL_EVENT_CDEV_STATE_UPDATE] = !!ops->cdev_update;116 enabled_ops[THERMAL_GENL_EVENT_TZ_GOV_CHANGE] = !!ops->gov_change;117}118 119thermal_error_t thermal_events_handle(struct thermal_handler *th, void *arg)120{121 struct thermal_handler_param thp = { .th = th, .arg = arg };122 123 if (!th)124 return THERMAL_ERROR;125 126 if (nl_cb_set(th->cb_event, NL_CB_VALID, NL_CB_CUSTOM,127 handle_thermal_event, &thp))128 return THERMAL_ERROR;129 130 return nl_recvmsgs(th->sk_event, th->cb_event);131}132 133int thermal_events_fd(struct thermal_handler *th)134{135 if (!th)136 return -1;137 138 return nl_socket_get_fd(th->sk_event);139}140 141thermal_error_t thermal_events_exit(struct thermal_handler *th)142{143 if (nl_unsubscribe_thermal(th->sk_event, th->cb_event,144 THERMAL_GENL_EVENT_GROUP_NAME))145 return THERMAL_ERROR;146 147 nl_thermal_disconnect(th->sk_event, th->cb_event);148 149 return THERMAL_SUCCESS;150}151 152thermal_error_t thermal_events_init(struct thermal_handler *th)153{154 thermal_events_ops_init(&th->ops->events);155 156 if (nl_thermal_connect(&th->sk_event, &th->cb_event))157 return THERMAL_ERROR;158 159 if (nl_subscribe_thermal(th->sk_event, th->cb_event,160 THERMAL_GENL_EVENT_GROUP_NAME))161 return THERMAL_ERROR;162 163 return THERMAL_SUCCESS;164}165