mac80211: add driver RSSI threshold events

[deliverable/linux.git] / net / mac80211 / util.c

diff --git a/net/mac80211/util.c b/net/mac80211/util.c
index 652e5695225ab969b1941eb3743071f8303d7b61..190132063c991ab99499e769db828ecae85b2fe3 100644 (file)
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -1450,3 +1450,43 @@ size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
 
        return pos;
 }
+
+static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
+                                           int rssi_min_thold,
+                                           int rssi_max_thold)
+{
+       trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
+
+       if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
+               return;
+
+       /*
+        * Scale up threshold values before storing it, as the RSSI averaging
+        * algorithm uses a scaled up value as well. Change this scaling
+        * factor if the RSSI averaging algorithm changes.
+        */
+       sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
+       sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
+}
+
+void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
+                                   int rssi_min_thold,
+                                   int rssi_max_thold)
+{
+       struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
+
+       WARN_ON(rssi_min_thold == rssi_max_thold ||
+               rssi_min_thold > rssi_max_thold);
+
+       _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
+                                      rssi_max_thold);
+}
+EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
+
+void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
+{
+       struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
+
+       _ieee80211_enable_rssi_reports(sdata, 0, 0);
+}
+EXPORT_SYMBOL(ieee80211_disable_rssi_reports);