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- // SPDX-License-Identifier: LGPL-2.1+
- // Copyright (C) 2022, Linaro Ltd - Daniel Lezcano <[email protected]>
- #include <linux/netlink.h>
- #include <stdio.h>
- #include <stdlib.h>
- #include <unistd.h>
- #include <thermal.h>
- #include "thermal_nl.h"
- /*
- * Optimization: fill this array to tell which event we do want to pay
- * attention to. That happens at init time with the ops
- * structure. Each ops will enable the event and the general handler
- * will be able to discard the event if there is not ops associated
- * with it.
- */
- static int enabled_ops[__THERMAL_GENL_EVENT_MAX];
- static int handle_thermal_event(struct nl_msg *n, void *arg)
- {
- struct nlmsghdr *nlh = nlmsg_hdr(n);
- struct genlmsghdr *genlhdr = genlmsg_hdr(nlh);
- struct nlattr *attrs[THERMAL_GENL_ATTR_MAX + 1];
- struct thermal_handler_param *thp = arg;
- struct thermal_events_ops *ops = &thp->th->ops->events;
- genlmsg_parse(nlh, 0, attrs, THERMAL_GENL_ATTR_MAX, NULL);
- arg = thp->arg;
- /*
- * This is an event we don't care of, bail out.
- */
- if (!enabled_ops[genlhdr->cmd])
- return THERMAL_SUCCESS;
- switch (genlhdr->cmd) {
- case THERMAL_GENL_EVENT_TZ_CREATE:
- return ops->tz_create(nla_get_string(attrs[THERMAL_GENL_ATTR_TZ_NAME]),
- nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_ID]), arg);
- case THERMAL_GENL_EVENT_TZ_DELETE:
- return ops->tz_delete(nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_ID]), arg);
- case THERMAL_GENL_EVENT_TZ_ENABLE:
- return ops->tz_enable(nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_ID]), arg);
- case THERMAL_GENL_EVENT_TZ_DISABLE:
- return ops->tz_disable(nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_ID]), arg);
- case THERMAL_GENL_EVENT_TZ_TRIP_CHANGE:
- return ops->trip_change(nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_ID]),
- nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_TRIP_ID]),
- nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_TRIP_TYPE]),
- nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_TRIP_TEMP]),
- nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_TRIP_HYST]), arg);
- case THERMAL_GENL_EVENT_TZ_TRIP_ADD:
- return ops->trip_add(nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_ID]),
- nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_TRIP_ID]),
- nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_TRIP_TYPE]),
- nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_TRIP_TEMP]),
- nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_TRIP_HYST]), arg);
- case THERMAL_GENL_EVENT_TZ_TRIP_DELETE:
- return ops->trip_delete(nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_ID]),
- nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_TRIP_ID]), arg);
- case THERMAL_GENL_EVENT_TZ_TRIP_UP:
- return ops->trip_high(nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_ID]),
- nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_TRIP_ID]),
- nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_TEMP]), arg);
- case THERMAL_GENL_EVENT_TZ_TRIP_DOWN:
- return ops->trip_low(nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_ID]),
- nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_TRIP_ID]),
- nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_TEMP]), arg);
- case THERMAL_GENL_EVENT_CDEV_ADD:
- return ops->cdev_add(nla_get_string(attrs[THERMAL_GENL_ATTR_CDEV_NAME]),
- nla_get_u32(attrs[THERMAL_GENL_ATTR_CDEV_ID]),
- nla_get_u32(attrs[THERMAL_GENL_ATTR_CDEV_MAX_STATE]), arg);
- case THERMAL_GENL_EVENT_CDEV_DELETE:
- return ops->cdev_delete(nla_get_u32(attrs[THERMAL_GENL_ATTR_CDEV_ID]), arg);
- case THERMAL_GENL_EVENT_CDEV_STATE_UPDATE:
- return ops->cdev_update(nla_get_u32(attrs[THERMAL_GENL_ATTR_CDEV_ID]),
- nla_get_u32(attrs[THERMAL_GENL_ATTR_CDEV_CUR_STATE]), arg);
- case THERMAL_GENL_EVENT_TZ_GOV_CHANGE:
- return ops->gov_change(nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_ID]),
- nla_get_string(attrs[THERMAL_GENL_ATTR_GOV_NAME]), arg);
- default:
- return -1;
- }
- }
- static void thermal_events_ops_init(struct thermal_events_ops *ops)
- {
- enabled_ops[THERMAL_GENL_EVENT_TZ_CREATE] = !!ops->tz_create;
- enabled_ops[THERMAL_GENL_EVENT_TZ_DELETE] = !!ops->tz_delete;
- enabled_ops[THERMAL_GENL_EVENT_TZ_DISABLE] = !!ops->tz_disable;
- enabled_ops[THERMAL_GENL_EVENT_TZ_ENABLE] = !!ops->tz_enable;
- enabled_ops[THERMAL_GENL_EVENT_TZ_TRIP_UP] = !!ops->trip_high;
- enabled_ops[THERMAL_GENL_EVENT_TZ_TRIP_DOWN] = !!ops->trip_low;
- enabled_ops[THERMAL_GENL_EVENT_TZ_TRIP_CHANGE] = !!ops->trip_change;
- enabled_ops[THERMAL_GENL_EVENT_TZ_TRIP_ADD] = !!ops->trip_add;
- enabled_ops[THERMAL_GENL_EVENT_TZ_TRIP_DELETE] = !!ops->trip_delete;
- enabled_ops[THERMAL_GENL_EVENT_CDEV_ADD] = !!ops->cdev_add;
- enabled_ops[THERMAL_GENL_EVENT_CDEV_DELETE] = !!ops->cdev_delete;
- enabled_ops[THERMAL_GENL_EVENT_CDEV_STATE_UPDATE] = !!ops->cdev_update;
- enabled_ops[THERMAL_GENL_EVENT_TZ_GOV_CHANGE] = !!ops->gov_change;
- }
- thermal_error_t thermal_events_handle(struct thermal_handler *th, void *arg)
- {
- struct thermal_handler_param thp = { .th = th, .arg = arg };
- if (!th)
- return THERMAL_ERROR;
- if (nl_cb_set(th->cb_event, NL_CB_VALID, NL_CB_CUSTOM,
- handle_thermal_event, &thp))
- return THERMAL_ERROR;
- return nl_recvmsgs(th->sk_event, th->cb_event);
- }
- int thermal_events_fd(struct thermal_handler *th)
- {
- if (!th)
- return -1;
- return nl_socket_get_fd(th->sk_event);
- }
- thermal_error_t thermal_events_exit(struct thermal_handler *th)
- {
- if (nl_unsubscribe_thermal(th->sk_event, th->cb_event,
- THERMAL_GENL_EVENT_GROUP_NAME))
- return THERMAL_ERROR;
- nl_thermal_disconnect(th->sk_event, th->cb_event);
- return THERMAL_SUCCESS;
- }
- thermal_error_t thermal_events_init(struct thermal_handler *th)
- {
- thermal_events_ops_init(&th->ops->events);
- if (nl_thermal_connect(&th->sk_event, &th->cb_event))
- return THERMAL_ERROR;
- if (nl_subscribe_thermal(th->sk_event, th->cb_event,
- THERMAL_GENL_EVENT_GROUP_NAME))
- return THERMAL_ERROR;
- return THERMAL_SUCCESS;
- }
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