thermal/events.c

   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 pay
  14  * attention to. That happens at init time with the ops
  15  * structure. Each ops will enable the event and the general handler
  16  * will be able to discard the event if there is not ops associated
  17  * with it.
  18  */
  19 static int enabled_ops[__THERMAL_GENL_EVENT_MAX];
  20
  21 static 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
 102 static 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
 119 thermal_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
 133 int 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
 141 thermal_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
 152 thermal_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 }