ath9k: Ensure a fair beacon distribution in IBSS mode.
Update the beacon queue parameters with best effort queue parameters for
IBSS mode. This reduces the number of beacons generated by ath9k and
ensures a fair beacon distribution when there are multiple IBSS stations.
Also CWmin is quadrupled to achieve the expected percentage of
distribution.
Signed-off-by: Vivek Natarajan <vnatarajan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath/ath9k/ath9k.h b/drivers/net/wireless/ath/ath9k/ath9k.h
index 3eb9677..42f79ca 100644
--- a/drivers/net/wireless/ath/ath9k/ath9k.h
+++ b/drivers/net/wireless/ath/ath9k/ath9k.h
@@ -329,6 +329,7 @@
void ath_beacon_config(struct ath_softc *sc, struct ieee80211_vif *vif);
int ath_beacon_alloc(struct ath_wiphy *aphy, struct ieee80211_vif *vif);
void ath_beacon_return(struct ath_softc *sc, struct ath_vif *avp);
+int ath_beaconq_config(struct ath_softc *sc);
/*******/
/* ANI */
diff --git a/drivers/net/wireless/ath/ath9k/beacon.c b/drivers/net/wireless/ath/ath9k/beacon.c
index cb774cc..1660ef1 100644
--- a/drivers/net/wireless/ath/ath9k/beacon.c
+++ b/drivers/net/wireless/ath/ath9k/beacon.c
@@ -23,11 +23,12 @@
* the operating mode of the station (AP or AdHoc). Parameters are AIFS
* settings and channel width min/max
*/
-static int ath_beaconq_config(struct ath_softc *sc)
+int ath_beaconq_config(struct ath_softc *sc)
{
struct ath_hw *ah = sc->sc_ah;
struct ath_common *common = ath9k_hw_common(ah);
- struct ath9k_tx_queue_info qi;
+ struct ath9k_tx_queue_info qi, qi_be;
+ int qnum;
ath9k_hw_get_txq_props(ah, sc->beacon.beaconq, &qi);
if (sc->sc_ah->opmode == NL80211_IFTYPE_AP) {
@@ -37,9 +38,12 @@
qi.tqi_cwmax = 0;
} else {
/* Adhoc mode; important thing is to use 2x cwmin. */
- qi.tqi_aifs = sc->beacon.beacon_qi.tqi_aifs;
- qi.tqi_cwmin = 2*sc->beacon.beacon_qi.tqi_cwmin;
- qi.tqi_cwmax = sc->beacon.beacon_qi.tqi_cwmax;
+ qnum = ath_tx_get_qnum(sc, ATH9K_TX_QUEUE_DATA,
+ ATH9K_WME_AC_BE);
+ ath9k_hw_get_txq_props(ah, qnum, &qi_be);
+ qi.tqi_aifs = qi_be.tqi_aifs;
+ qi.tqi_cwmin = 4*qi_be.tqi_cwmin;
+ qi.tqi_cwmax = qi_be.tqi_cwmax;
}
if (!ath9k_hw_set_txq_props(ah, sc->beacon.beaconq, &qi)) {
diff --git a/drivers/net/wireless/ath/ath9k/main.c b/drivers/net/wireless/ath/ath9k/main.c
index cfe710b..b959814 100644
--- a/drivers/net/wireless/ath/ath9k/main.c
+++ b/drivers/net/wireless/ath/ath9k/main.c
@@ -2882,6 +2882,10 @@
if (ret)
ath_print(common, ATH_DBG_FATAL, "TXQ Update failed\n");
+ if (sc->sc_ah->opmode == NL80211_IFTYPE_ADHOC)
+ if ((qnum == sc->tx.hwq_map[ATH9K_WME_AC_BE]) && !ret)
+ ath_beaconq_config(sc);
+
mutex_unlock(&sc->mutex);
return ret;