From: Sujith Manoharan <c_manoha@xxxxxxxxxxxxxxxx>
Since CTWindow can be used for improving discoverability,
fill this field in the NoA Attribute properly.
Signed-off-by: Sujith Manoharan <c_manoha@xxxxxxxxxxxxxxxx>
---
drivers/net/wireless/ath/ath9k/ath9k.h | 2 ++
drivers/net/wireless/ath/ath9k/channel.c | 26 ++++++++++++++++++++++++++
drivers/net/wireless/ath/ath9k/init.c | 5 +++--
3 files changed, 31 insertions(+), 2 deletions(-)
diff --git a/drivers/net/wireless/ath/ath9k/ath9k.h b/drivers/net/wireless/ath/ath9k/ath9k.h
index c690601..b4ac51e 100644
--- a/drivers/net/wireless/ath/ath9k/ath9k.h
+++ b/drivers/net/wireless/ath/ath9k/ath9k.h
@@ -572,6 +572,8 @@ void ath9k_release_buffered_frames(struct ieee80211_hw *hw,
/* VIFs */
/********/
+#define P2P_DEFAULT_CTWIN 10
+
struct ath_vif {
struct list_head list;
diff --git a/drivers/net/wireless/ath/ath9k/channel.c b/drivers/net/wireless/ath/ath9k/channel.c
index 7a6ca44..e73d305 100644
--- a/drivers/net/wireless/ath/ath9k/channel.c
+++ b/drivers/net/wireless/ath/ath9k/channel.c
@@ -1166,6 +1166,30 @@ static void ath9k_update_p2p_ps(struct ath_softc *sc, struct ieee80211_vif *vif)
ath9k_update_p2p_ps_timer(sc, avp);
}
+static u8 ath9k_get_ctwin(struct ath_softc *sc, struct ath_vif *avp)
+{
+ struct ath_beacon_config *cur_conf = &sc->cur_chan->beacon;
+ u8 switch_time, ctwin;
+
+ /*
+ * Channel switch in multi-channel mode is deferred
+ * by a quarter beacon interval when handling
+ * ATH_CHANCTX_EVENT_BEACON_PREPARE, so the P2P-GO
+ * interface is guaranteed to be discoverable
+ * for that duration after a TBTT.
+ */
+ switch_time = cur_conf->beacon_interval / 4;
+
+ ctwin = avp->vif->bss_conf.p2p_noa_attr.oppps_ctwindow;
+ if (ctwin && (ctwin < switch_time))
+ return ctwin;
+
+ if (switch_time < P2P_DEFAULT_CTWIN)
+ return 0;
+
+ return P2P_DEFAULT_CTWIN;
+}
+
void ath9k_beacon_add_noa(struct ath_softc *sc, struct ath_vif *avp,
struct sk_buff *skb)
{
@@ -1198,6 +1222,8 @@ void ath9k_beacon_add_noa(struct ath_softc *sc, struct ath_vif *avp,
memset(noa, 0, noa_len);
noa->index = avp->noa_index;
+ noa->oppps_ctwindow = ath9k_get_ctwin(sc, avp);
+
if (avp->periodic_noa_duration) {
u32 interval = TU_TO_USEC(sc->cur_chan->beacon.beacon_interval);
diff --git a/drivers/net/wireless/ath/ath9k/init.c b/drivers/net/wireless/ath/ath9k/init.c
index ca10a8b..1950c04 100644
--- a/drivers/net/wireless/ath/ath9k/init.c
+++ b/drivers/net/wireless/ath/ath9k/init.c
@@ -763,8 +763,9 @@ static void ath9k_set_hw_capab(struct ath_softc *sc, struct ieee80211_hw *hw)
if (AR_SREV_9160_10_OR_LATER(sc->sc_ah) || ath9k_modparam_nohwcrypt)
hw->flags |= IEEE80211_HW_MFP_CAPABLE;
- hw->wiphy->features |= (NL80211_FEATURE_ACTIVE_MONITOR |
- NL80211_FEATURE_AP_MODE_CHAN_WIDTH_CHANGE);
+ hw->wiphy->features |= NL80211_FEATURE_ACTIVE_MONITOR |
+ NL80211_FEATURE_AP_MODE_CHAN_WIDTH_CHANGE |
+ NL80211_FEATURE_P2P_GO_CTWIN;
if (!config_enabled(CONFIG_ATH9K_TX99)) {
hw->wiphy->interface_modes =
--
2.1.0
--
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