mac80211: add driver RSSI threshold events
mac80211 maintains a running average of the RSSI when a STA
is associated to an AP. Report threshold events to any driver
that has registered callbacks for getting RSSI measurements.
Implement callbacks in mac80211 so that driver can set thresholds.
Add callbacks in mac80211 which is invoked when an RSSI threshold
event occurs.
mac80211: add tracing to rssi_reports api and remove extraneous fn argument
mac80211: scale up rssi thresholds from driver by 16 before storing
Signed-off-by: Meenakshi Venkataraman <meenakshi.venkataraman@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index b6d9bd5..4b0460a 100644
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -1763,6 +1763,7 @@
ifmgd->ave_beacon_signal = rx_status->signal * 16;
ifmgd->last_cqm_event_signal = 0;
ifmgd->count_beacon_signal = 1;
+ ifmgd->last_ave_beacon_signal = 0;
} else {
ifmgd->ave_beacon_signal =
(IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
@@ -1770,6 +1771,28 @@
ifmgd->ave_beacon_signal) / 16;
ifmgd->count_beacon_signal++;
}
+
+ if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
+ ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
+ int sig = ifmgd->ave_beacon_signal;
+ int last_sig = ifmgd->last_ave_beacon_signal;
+
+ /*
+ * if signal crosses either of the boundaries, invoke callback
+ * with appropriate parameters
+ */
+ if (sig > ifmgd->rssi_max_thold &&
+ (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
+ ifmgd->last_ave_beacon_signal = sig;
+ drv_rssi_callback(local, RSSI_EVENT_HIGH);
+ } else if (sig < ifmgd->rssi_min_thold &&
+ (last_sig >= ifmgd->rssi_max_thold ||
+ last_sig == 0)) {
+ ifmgd->last_ave_beacon_signal = sig;
+ drv_rssi_callback(local, RSSI_EVENT_LOW);
+ }
+ }
+
if (bss_conf->cqm_rssi_thold &&
ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
!(local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI)) {