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ath9k: Add periodic NoA support 

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: Rajkumar Manoharan <rmanohar@qti.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Felix Fietkau 2014-06-11 16:18:11 +05:30 committed by John W. Linville
parent 73fa2f26d3
commit 7414863ed3
3 changed files with 44 additions and 8 deletions
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3
drivers/net/wireless/ath/ath9k/ath9k.h
View File

@ -489,6 +489,9 @@ struct ath_vif {
u8 noa_index;
u32 offchannel_start;
u32 offchannel_duration;
u32 periodic_noa_start;
u32 periodic_noa_duration;
};
struct ath9k_vif_iter_data {

25
drivers/net/wireless/ath/ath9k/beacon.c
View File

@ -122,12 +122,15 @@ static void ath9k_beacon_add_noa(struct ath_softc *sc, struct ath_vif *avp,
};
struct ieee80211_p2p_noa_attr *noa;
int noa_len = 2 + sizeof(struct ieee80211_p2p_noa_desc);
int noa_len, noa_desc, i = 0;
u8 *hdr;
if (!avp->offchannel_duration)
if (!avp->offchannel_duration && !avp->periodic_noa_duration)
return;
noa_desc = !!avp->offchannel_duration + !!avp->periodic_noa_duration;
noa_len = 2 + sizeof(struct ieee80211_p2p_noa_desc) * noa_desc;
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;
@ -137,9 +140,21 @@ static void ath9k_beacon_add_noa(struct ath_softc *sc, struct ath_vif *avp,
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);
if (avp->periodic_noa_duration) {
u32 interval = TU_TO_USEC(sc->cur_chan->beacon.beacon_interval);
noa->desc[i].count = 255;
noa->desc[i].start_time = cpu_to_le32(avp->periodic_noa_start);
noa->desc[i].duration = cpu_to_le32(avp->periodic_noa_duration);
noa->desc[i].interval = cpu_to_le32(interval);
i++;
}
if (avp->offchannel_duration) {
noa->desc[i].count = 1;
noa->desc[i].start_time = cpu_to_le32(avp->offchannel_start);
noa->desc[i].duration = cpu_to_le32(avp->offchannel_duration);
}
}
static struct ath_buf *ath9k_beacon_generate(struct ieee80211_hw *hw,

24
drivers/net/wireless/ath/ath9k/channel.c
View File

@ -474,6 +474,7 @@ void ath_chanctx_event(struct ath_softc *sc, struct ieee80211_vif *vif,
{
struct ath_hw *ah = sc->sc_ah;
struct ath_common *common = ath9k_hw_common(ah);
struct ath_beacon_config *cur_conf;
struct ath_vif *avp = NULL;
struct ath_chanctx *ctx;
u32 tsf_time;
@ -514,12 +515,29 @@ void ath_chanctx_event(struct ath_softc *sc, struct ieee80211_vif *vif,
sc->sched.beacon_pending = true;
sc->sched.next_tbtt = REG_READ(ah, AR_NEXT_TBTT_TIMER);
cur_conf = &sc->cur_chan->beacon;
/* defer channel switch by a quarter beacon interval */
tsf_time = TU_TO_USEC(sc->cur_chan->beacon.beacon_interval);
tsf_time = TU_TO_USEC(cur_conf->beacon_interval);
tsf_time = sc->sched.next_tbtt + tsf_time / 4;
sc->sched.switch_start_time = tsf_time;
sc->cur_chan->last_beacon = sc->sched.next_tbtt;
/* Prevent wrap-around issues */
if (avp->periodic_noa_duration &&
tsf_time - avp->periodic_noa_start > BIT(30))
avp->periodic_noa_duration = 0;
if (ctx->active && !avp->periodic_noa_duration) {
avp->periodic_noa_start = tsf_time;
avp->periodic_noa_duration =
TU_TO_USEC(cur_conf->beacon_interval) / 2 -
sc->sched.channel_switch_time;
noa_changed = true;
} else if (!ctx->active && avp->periodic_noa_duration) {
avp->periodic_noa_duration = 0;
noa_changed = true;
}
if (sc->sched.offchannel_duration) {
noa_changed = true;
avp->offchannel_start = tsf_time;
@ -575,11 +593,11 @@ void ath_chanctx_event(struct ath_softc *sc, struct ieee80211_vif *vif,
* beacon period (minus channel switch time)
*/
sc->next_chan = ath_chanctx_get_next(sc, sc->cur_chan);
cur_conf = &sc->cur_chan->beacon;
sc->sched.state = ATH_CHANCTX_STATE_WAIT_FOR_TIMER;
tsf_time = ath9k_hw_gettsf32(sc->sc_ah);
tsf_time +=
TU_TO_USEC(sc->cur_chan->beacon.beacon_interval) / 2;
tsf_time += TU_TO_USEC(cur_conf->beacon_interval) / 2;
tsf_time -= sc->sched.channel_switch_time;
sc->sched.switch_start_time = tsf_time;