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authorMeenakshi Venkataraman <meenakshi.venkataraman@intel.com>2011-07-08 08:46:22 -0700
committerJohn W. Linville <linville@tuxdriver.com>2011-07-11 15:02:06 -0400
commit615f7b9bb1f8e0e3188470245cec44f175189084 (patch)
tree4c0803460f682c34b11929a1fe22e150839efedb /net/mac80211/mlme.c
parent0a49b2c2a6bf2f774675e472afe68951900596fb (diff)
downloadlwn-615f7b9bb1f8e0e3188470245cec44f175189084.tar.gz
lwn-615f7b9bb1f8e0e3188470245cec44f175189084.zip
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>
Diffstat (limited to 'net/mac80211/mlme.c')
-rw-r--r--net/mac80211/mlme.c23
1 files changed, 23 insertions, 0 deletions
diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index b6d9bd5f4d3c..4b0460ad8c8f 100644
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -1763,6 +1763,7 @@ static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
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 @@ static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
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)) {