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From: Sujith Manoharan <c_manoha@qca.qualcomm.com>
Date: Fri, 17 Oct 2014 07:40:27 +0530
Subject: [PATCH] ath9k: Send oneshot NoA
This patch makes sure that a GO interface
sends out a new NoA schedule with 200ms duration
when mgd_prepare_tx() is called.
Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>
---
--- a/drivers/net/wireless/ath/ath9k/ath9k.h
+++ b/drivers/net/wireless/ath/ath9k/ath9k.h
@@ -620,6 +620,7 @@ struct ath_vif {
u32 noa_start;
u32 noa_duration;
bool periodic_noa;
+ bool oneshot_noa;
};
struct ath9k_vif_iter_data {
--- a/drivers/net/wireless/ath/ath9k/channel.c
+++ b/drivers/net/wireless/ath/ath9k/channel.c
@@ -450,6 +450,27 @@ static void ath_chanctx_set_periodic_noa
avp->periodic_noa);
}
+static void ath_chanctx_set_oneshot_noa(struct ath_softc *sc,
+ struct ath_vif *avp,
+ u32 tsf_time,
+ u32 duration)
+{
+ struct ath_common *common = ath9k_hw_common(sc->sc_ah);
+
+ avp->noa_index++;
+ avp->noa_start = tsf_time;
+ avp->periodic_noa = false;
+ avp->oneshot_noa = true;
+ avp->noa_duration = duration + sc->sched.channel_switch_time;
+
+ ath_dbg(common, CHAN_CTX,
+ "oneshot noa_duration: %d, noa_start: %d, noa_index: %d, periodic: %d\n",
+ avp->noa_duration,
+ avp->noa_start,
+ avp->noa_index,
+ avp->periodic_noa);
+}
+
void ath_chanctx_event(struct ath_softc *sc, struct ieee80211_vif *vif,
enum ath_chanctx_event ev)
{
@@ -476,6 +497,14 @@ void ath_chanctx_event(struct ath_softc
if (avp->offchannel_duration)
avp->offchannel_duration = 0;
+ if (avp->oneshot_noa) {
+ avp->noa_duration = 0;
+ avp->oneshot_noa = false;
+
+ ath_dbg(common, CHAN_CTX,
+ "Clearing oneshot NoA\n");
+ }
+
if (avp->chanctx != sc->cur_chan) {
ath_dbg(common, CHAN_CTX,
"Contexts differ, not preparing beacon\n");
@@ -551,6 +580,18 @@ void ath_chanctx_event(struct ath_softc
ath_chanctx_handle_bmiss(sc, ctx, avp);
+ /*
+ * If a mgd_prepare_tx() has been called by mac80211,
+ * a one-shot NoA needs to be sent. This can happen
+ * with one or more active channel contexts - in both
+ * cases, a new NoA schedule has to be advertised.
+ */
+ if (sc->sched.mgd_prepare_tx) {
+ ath_chanctx_set_oneshot_noa(sc, avp, tsf_time,
+ jiffies_to_usecs(HZ / 5));
+ break;
+ }
+
/* Prevent wrap-around issues */
if (avp->noa_duration && tsf_time - avp->noa_start > BIT(30))
avp->noa_duration = 0;
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