250 lines
6.5 KiB
Diff
250 lines
6.5 KiB
Diff
From 6744d0a7ea037c7d65e13ca906da93009b241d00 Mon Sep 17 00:00:00 2001
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From: Felix Fietkau <nbd@openwrt.org>
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Date: Tue, 11 Feb 2014 11:16:24 +0100
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Subject: [PATCH] ath9k: implement p2p client powersave support
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Use generic TSF timers to trigger powersave state changes based
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information from the P2P NoA attribute.
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Opportunistic Powersave is not handled, because the driver does not
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support powersave at the moment.
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Signed-off-by: Felix Fietkau <nbd@openwrt.org>
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---
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drivers/net/wireless/ath/ath9k/ath9k.h | 12 ++++
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drivers/net/wireless/ath/ath9k/init.c | 6 ++
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drivers/net/wireless/ath/ath9k/main.c | 104 +++++++++++++++++++++++++++++++++
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drivers/net/wireless/ath/ath9k/recv.c | 3 +
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4 files changed, 125 insertions(+)
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--- a/drivers/net/wireless/ath/ath9k/main.c
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+++ b/drivers/net/wireless/ath/ath9k/main.c
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@@ -261,6 +261,8 @@ static bool ath_complete_reset(struct at
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sc->gtt_cnt = 0;
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ieee80211_wake_queues(sc->hw);
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+ ath9k_p2p_ps_timer(sc);
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+
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return true;
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}
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@@ -1128,6 +1130,8 @@ static int ath9k_add_interface(struct ie
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if (ath9k_uses_beacons(vif->type))
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ath9k_beacon_assign_slot(sc, vif);
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+ avp->vif = vif;
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+
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an->sc = sc;
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an->sta = NULL;
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an->vif = vif;
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@@ -1172,6 +1176,29 @@ static int ath9k_change_interface(struct
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return 0;
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}
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+static void
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+ath9k_update_p2p_ps_timer(struct ath_softc *sc, struct ath_vif *avp)
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+{
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+ struct ath_hw *ah = sc->sc_ah;
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+ s32 tsf, target_tsf;
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+
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+ if (!avp || !avp->noa.has_next_tsf)
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+ return;
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+
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+ ath9k_hw_gen_timer_stop(ah, sc->p2p_ps_timer);
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+
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+ tsf = ath9k_hw_gettsf32(sc->sc_ah);
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+
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+ target_tsf = avp->noa.next_tsf;
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+ if (!avp->noa.absent)
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+ target_tsf -= ATH_P2P_PS_STOP_TIME;
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+
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+ if (target_tsf - tsf < ATH_P2P_PS_STOP_TIME)
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+ target_tsf = tsf + ATH_P2P_PS_STOP_TIME;
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+
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+ ath9k_hw_gen_timer_start(ah, sc->p2p_ps_timer, (u32) target_tsf, 1000000);
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+}
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+
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static void ath9k_remove_interface(struct ieee80211_hw *hw,
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struct ieee80211_vif *vif)
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{
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@@ -1183,6 +1210,13 @@ static void ath9k_remove_interface(struc
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mutex_lock(&sc->mutex);
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+ spin_lock_bh(&sc->sc_pcu_lock);
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+ if (avp == sc->p2p_ps_vif) {
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+ sc->p2p_ps_vif = NULL;
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+ ath9k_update_p2p_ps_timer(sc, NULL);
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+ }
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+ spin_unlock_bh(&sc->sc_pcu_lock);
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+
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sc->nvifs--;
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sc->tx99_vif = NULL;
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@@ -1649,6 +1683,72 @@ static void ath9k_bss_assoc_iter(void *d
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ath9k_set_assoc_state(sc, vif);
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}
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+void ath9k_p2p_ps_timer(void *priv)
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+{
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+ struct ath_softc *sc = priv;
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+ struct ath_vif *avp = sc->p2p_ps_vif;
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+ struct ieee80211_vif *vif;
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+ struct ieee80211_sta *sta;
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+ struct ath_node *an;
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+ u32 tsf;
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+
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+ if (!avp)
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+ return;
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+
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+ tsf = ath9k_hw_gettsf32(sc->sc_ah);
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+ if (!avp->noa.absent)
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+ tsf += ATH_P2P_PS_STOP_TIME;
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+
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+ if (!avp->noa.has_next_tsf ||
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+ avp->noa.next_tsf - tsf > BIT(31))
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+ ieee80211_update_p2p_noa(&avp->noa, tsf);
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+
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+ ath9k_update_p2p_ps_timer(sc, avp);
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+
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+ rcu_read_lock();
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+
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+ vif = avp->vif;
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+ sta = ieee80211_find_sta(vif, vif->bss_conf.bssid);
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+ if (!sta)
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+ goto out;
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+
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+ an = (void *) sta->drv_priv;
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+ if (an->sleeping == !!avp->noa.absent)
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+ goto out;
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+
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+ an->sleeping = avp->noa.absent;
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+ if (an->sleeping)
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+ ath_tx_aggr_sleep(sta, sc, an);
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+ else
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+ ath_tx_aggr_wakeup(sc, an);
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+
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+out:
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+ rcu_read_unlock();
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+}
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+
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+void ath9k_update_p2p_ps(struct ath_softc *sc, struct ieee80211_vif *vif)
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+{
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+ struct ath_vif *avp = (void *)vif->drv_priv;
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+ unsigned long flags;
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+ u32 tsf;
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+
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+ if (!sc->p2p_ps_timer)
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+ return;
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+
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+ if (vif->type != NL80211_IFTYPE_STATION || !vif->p2p)
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+ return;
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+
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+ sc->p2p_ps_vif = avp;
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+
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+ spin_lock_irqsave(&sc->sc_pm_lock, flags);
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+ if (!(sc->ps_flags & PS_BEACON_SYNC)) {
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+ tsf = ath9k_hw_gettsf32(sc->sc_ah);
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+ ieee80211_parse_p2p_noa(&vif->bss_conf.p2p_noa_attr, &avp->noa, tsf);
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+ ath9k_update_p2p_ps_timer(sc, avp);
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+ }
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+ spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
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+}
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+
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static void ath9k_bss_info_changed(struct ieee80211_hw *hw,
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struct ieee80211_vif *vif,
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struct ieee80211_bss_conf *bss_conf,
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@@ -1723,6 +1823,12 @@ static void ath9k_bss_info_changed(struc
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}
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}
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+ if (changed & BSS_CHANGED_P2P_PS) {
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+ spin_lock_bh(&sc->sc_pcu_lock);
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+ ath9k_update_p2p_ps(sc, vif);
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+ spin_unlock_bh(&sc->sc_pcu_lock);
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+ }
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+
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if (changed & CHECK_ANI)
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ath_check_ani(sc);
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--- a/drivers/net/wireless/ath/ath9k/ath9k.h
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+++ b/drivers/net/wireless/ath/ath9k/ath9k.h
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@@ -114,6 +114,9 @@ int ath_descdma_setup(struct ath_softc *
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#define ATH_TXFIFO_DEPTH 8
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#define ATH_TX_ERROR 0x01
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+/* Stop tx traffic 1ms before the GO goes away */
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+#define ATH_P2P_PS_STOP_TIME 1000
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+
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#define IEEE80211_SEQ_SEQ_SHIFT 4
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#define IEEE80211_SEQ_MAX 4096
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#define IEEE80211_WEP_IVLEN 3
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@@ -366,11 +369,15 @@ void ath9k_release_buffered_frames(struc
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/********/
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struct ath_vif {
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+ struct ieee80211_vif *vif;
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struct ath_node mcast_node;
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int av_bslot;
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bool primary_sta_vif;
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__le64 tsf_adjust; /* TSF adjustment for staggered beacons */
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struct ath_buf *av_bcbuf;
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+
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+ /* P2P Client */
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+ struct ieee80211_noa_data noa;
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};
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struct ath9k_vif_iter_data {
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@@ -463,6 +470,8 @@ int ath_update_survey_stats(struct ath_s
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void ath_update_survey_nf(struct ath_softc *sc, int channel);
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void ath9k_queue_reset(struct ath_softc *sc, enum ath_reset_type type);
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void ath_ps_full_sleep(unsigned long data);
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+void ath9k_p2p_ps_timer(void *priv);
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+void ath9k_update_p2p_ps(struct ath_softc *sc, struct ieee80211_vif *vif);
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/**********/
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/* BTCOEX */
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@@ -723,6 +732,9 @@ struct ath_softc {
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struct completion paprd_complete;
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wait_queue_head_t tx_wait;
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+ struct ath_gen_timer *p2p_ps_timer;
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+ struct ath_vif *p2p_ps_vif;
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+
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unsigned long driver_data;
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u8 gtt_cnt;
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--- a/drivers/net/wireless/ath/ath9k/init.c
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+++ b/drivers/net/wireless/ath/ath9k/init.c
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@@ -593,6 +593,9 @@ static int ath9k_init_softc(u16 devid, s
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if (ret)
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goto err_btcoex;
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+ sc->p2p_ps_timer = ath_gen_timer_alloc(sc->sc_ah, ath9k_p2p_ps_timer,
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+ NULL, sc, AR_FIRST_NDP_TIMER);
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+
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ath9k_cmn_init_crypto(sc->sc_ah);
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ath9k_init_misc(sc);
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ath_fill_led_pin(sc);
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@@ -875,6 +878,9 @@ static void ath9k_deinit_softc(struct at
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{
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int i = 0;
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+ if (sc->p2p_ps_timer)
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+ ath_gen_timer_free(sc->sc_ah, sc->p2p_ps_timer);
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+
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ath9k_deinit_btcoex(sc);
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for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++)
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--- a/drivers/net/wireless/ath/ath9k/recv.c
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+++ b/drivers/net/wireless/ath/ath9k/recv.c
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@@ -539,6 +539,9 @@ static void ath_rx_ps_beacon(struct ath_
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ath_dbg(common, PS,
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"Reconfigure beacon timers based on synchronized timestamp\n");
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ath9k_set_beacon(sc);
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+
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+ if (sc->p2p_ps_vif)
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+ ath9k_update_p2p_ps(sc, sc->p2p_ps_vif->vif);
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}
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if (ath_beacon_dtim_pending_cab(skb)) {
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