From 3ae07d39ea81440768427e7786c5422f3af38a94 Mon Sep 17 00:00:00 2001 From: Felix Fietkau Date: Wed, 11 Jun 2014 16:18:06 +0530 Subject: [PATCH] ath9k: Add p2p go NoA attribute Signed-off-by: Felix Fietkau Signed-off-by: Rajkumar Manoharan Signed-off-by: John W. Linville --- drivers/net/wireless/ath/ath9k/ath9k.h | 7 +++++ drivers/net/wireless/ath/ath9k/beacon.c | 37 ++++++++++++++++++++++ drivers/net/wireless/ath/ath9k/channel.c | 39 +++++++++++++++++++++--- drivers/net/wireless/ath/ath9k/init.c | 2 ++ 4 files changed, 80 insertions(+), 5 deletions(-) diff --git a/drivers/net/wireless/ath/ath9k/ath9k.h b/drivers/net/wireless/ath/ath9k/ath9k.h index 6487c4769af4..02f30980c31a 100644 --- a/drivers/net/wireless/ath/ath9k/ath9k.h +++ b/drivers/net/wireless/ath/ath9k/ath9k.h @@ -362,6 +362,8 @@ struct ath_chanctx_sched { enum ath_chanctx_state state; u32 next_tbtt; + u32 switch_start_time; + unsigned int offchannel_duration; unsigned int channel_switch_time; }; @@ -472,6 +474,11 @@ struct ath_vif { /* P2P Client */ struct ieee80211_noa_data noa; + + /* P2P GO */ + u8 noa_index; + u32 offchannel_start; + u32 offchannel_duration; }; struct ath9k_vif_iter_data { diff --git a/drivers/net/wireless/ath/ath9k/beacon.c b/drivers/net/wireless/ath/ath9k/beacon.c index 5b1689cf029a..85a40d749e20 100644 --- a/drivers/net/wireless/ath/ath9k/beacon.c +++ b/drivers/net/wireless/ath/ath9k/beacon.c @@ -108,6 +108,40 @@ static void ath9k_beacon_setup(struct ath_softc *sc, struct ieee80211_vif *vif, ath9k_hw_set_txdesc(ah, bf->bf_desc, &info); } +static void ath9k_beacon_add_noa(struct ath_softc *sc, struct ath_vif *avp, + struct sk_buff *skb) +{ + static const u8 noa_ie_hdr[] = { + WLAN_EID_VENDOR_SPECIFIC, /* type */ + 0, /* length */ + 0x50, 0x6f, 0x9a, /* WFA OUI */ + 0x09, /* P2P subtype */ + 0x0c, /* Notice of Absence */ + 0x00, /* LSB of little-endian len */ + 0x00, /* MSB of little-endian len */ + }; + + struct ieee80211_p2p_noa_attr *noa; + int noa_len = 2 + sizeof(struct ieee80211_p2p_noa_desc); + u8 *hdr; + + if (!avp->offchannel_duration) + return; + + hdr = skb_put(skb, sizeof(noa_ie_hdr)); + memcpy(hdr, noa_ie_hdr, sizeof(noa_ie_hdr)); + hdr[1] = sizeof(noa_ie_hdr) + noa_len - 2; + hdr[7] = noa_len; + + noa = (void *) skb_put(skb, noa_len); + memset(noa, 0, noa_len); + + noa->index = avp->noa_index; + noa->desc[0].count = 1; + noa->desc[0].duration = cpu_to_le32(avp->offchannel_duration); + noa->desc[0].start_time = cpu_to_le32(avp->offchannel_start); +} + static struct ath_buf *ath9k_beacon_generate(struct ieee80211_hw *hw, struct ieee80211_vif *vif) { @@ -155,6 +189,9 @@ static struct ath_buf *ath9k_beacon_generate(struct ieee80211_hw *hw, hdr->seq_ctrl |= cpu_to_le16(sc->tx.seq_no); } + if (vif->p2p) + ath9k_beacon_add_noa(sc, avp, skb); + bf->bf_buf_addr = dma_map_single(sc->dev, skb->data, skb->len, DMA_TO_DEVICE); if (unlikely(dma_mapping_error(sc->dev, bf->bf_buf_addr))) { diff --git a/drivers/net/wireless/ath/ath9k/channel.c b/drivers/net/wireless/ath/ath9k/channel.c index 503b7766e12e..364a55502b7d 100644 --- a/drivers/net/wireless/ath/ath9k/channel.c +++ b/drivers/net/wireless/ath/ath9k/channel.c @@ -270,6 +270,8 @@ void ath_chanctx_work(struct work_struct *work) sc->cur_chan->stopped = false; sc->next_chan = NULL; sc->sched.state = ATH_CHANCTX_STATE_IDLE; + sc->sched.offchannel_duration = 0; + spin_unlock_bh(&sc->chan_lock); if (sc->sc_ah->chip_fullsleep || @@ -326,6 +328,12 @@ void ath_chanctx_switch(struct ath_softc *sc, struct ath_chanctx *ctx, sc->next_chan = ctx; if (chandef) ctx->chandef = *chandef; + + if (sc->next_chan == &sc->offchannel.chan) { + sc->sched.offchannel_duration = + TU_TO_USEC(sc->offchannel.duration) + + sc->sched.channel_switch_time; + } spin_unlock_bh(&sc->chan_lock); ieee80211_queue_work(sc->hw, &sc->chanctx_work); } @@ -377,17 +385,40 @@ void ath_chanctx_event(struct ath_softc *sc, struct ieee80211_vif *vif, enum ath_chanctx_event ev) { struct ath_hw *ah = sc->sc_ah; + struct ath_vif *avp = NULL; u32 tsf_time; + bool noa_changed = false; + + if (vif) + avp = (struct ath_vif *) vif->drv_priv; spin_lock_bh(&sc->chan_lock); switch (ev) { case ATH_CHANCTX_EVENT_BEACON_PREPARE: + if (avp->offchannel_duration) + avp->offchannel_duration = 0; + if (sc->sched.state != ATH_CHANCTX_STATE_WAIT_FOR_BEACON) break; sc->sched.beacon_pending = true; sc->sched.next_tbtt = REG_READ(ah, AR_NEXT_TBTT_TIMER); + + /* defer channel switch by a quarter beacon interval */ + tsf_time = TU_TO_USEC(sc->cur_chan->beacon.beacon_interval); + tsf_time = sc->sched.next_tbtt + tsf_time / 4; + sc->sched.switch_start_time = tsf_time; + + if (sc->sched.offchannel_duration) { + noa_changed = true; + avp->offchannel_start = tsf_time; + avp->offchannel_duration = + sc->sched.offchannel_duration; + } + + if (noa_changed) + avp->noa_index++; break; case ATH_CHANCTX_EVENT_BEACON_SENT: if (!sc->sched.beacon_pending) @@ -397,12 +428,10 @@ void ath_chanctx_event(struct ath_softc *sc, struct ieee80211_vif *vif, if (sc->sched.state != ATH_CHANCTX_STATE_WAIT_FOR_BEACON) break; - /* defer channel switch by a quarter beacon interval */ - tsf_time = TU_TO_USEC(sc->cur_chan->beacon.beacon_interval); - tsf_time = sc->sched.next_tbtt + tsf_time / 4; sc->sched.state = ATH_CHANCTX_STATE_WAIT_FOR_TIMER; - ath9k_hw_gen_timer_start(ah, sc->p2p_ps_timer, tsf_time, - 1000000); + ath9k_hw_gen_timer_start(ah, sc->p2p_ps_timer, + sc->sched.switch_start_time, + 1000000); break; case ATH_CHANCTX_EVENT_TSF_TIMER: if (sc->sched.state != ATH_CHANCTX_STATE_WAIT_FOR_TIMER) diff --git a/drivers/net/wireless/ath/ath9k/init.c b/drivers/net/wireless/ath/ath9k/init.c index 1ff1a75f4fed..66a9dc3a5369 100644 --- a/drivers/net/wireless/ath/ath9k/init.c +++ b/drivers/net/wireless/ath/ath9k/init.c @@ -754,6 +754,8 @@ static void ath9k_set_hw_capab(struct ath_softc *sc, struct ieee80211_hw *hw) hw->wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN; hw->wiphy->max_remain_on_channel_duration = 10000; hw->chanctx_data_size = sizeof(void *); + hw->extra_beacon_tailroom = + sizeof(struct ieee80211_p2p_noa_attr) + 9; } } -- 2.20.1