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path: root/drivers/net/wireless/ath/ath9k/channel.c
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Diffstat (limited to 'drivers/net/wireless/ath/ath9k/channel.c')
-rw-r--r--drivers/net/wireless/ath/ath9k/channel.c338
1 files changed, 247 insertions, 91 deletions
diff --git a/drivers/net/wireless/ath/ath9k/channel.c b/drivers/net/wireless/ath/ath9k/channel.c
index 945c898..2066650 100644
--- a/drivers/net/wireless/ath/ath9k/channel.c
+++ b/drivers/net/wireless/ath/ath9k/channel.c
@@ -66,7 +66,7 @@ static int ath_set_channel(struct ath_softc *sc)
}
hchan = &sc->sc_ah->channels[pos];
- r = ath_reset_internal(sc, hchan);
+ r = ath_reset(sc, hchan);
if (r)
return r;
@@ -92,8 +92,8 @@ static int ath_set_channel(struct ath_softc *sc)
} else {
/* perform spectral scan if requested. */
if (test_bit(ATH_OP_SCANNING, &common->op_flags) &&
- sc->spectral_mode == SPECTRAL_CHANSCAN)
- ath9k_spectral_scan_trigger(hw);
+ sc->spec_priv.spectral_mode == SPECTRAL_CHANSCAN)
+ ath9k_cmn_spectral_scan_trigger(common, &sc->spec_priv);
}
return 0;
@@ -117,6 +117,7 @@ void ath_chanctx_init(struct ath_softc *sc)
cfg80211_chandef_create(&ctx->chandef, chan, NL80211_CHAN_HT20);
INIT_LIST_HEAD(&ctx->vifs);
ctx->txpower = ATH_TXPOWER_MAX;
+ ctx->flush_timeout = HZ / 5; /* 200ms */
for (j = 0; j < ARRAY_SIZE(ctx->acq); j++)
INIT_LIST_HEAD(&ctx->acq[j]);
}
@@ -145,6 +146,36 @@ void ath_chanctx_set_channel(struct ath_softc *sc, struct ath_chanctx *ctx,
#ifdef CONFIG_ATH9K_CHANNEL_CONTEXT
+/*************/
+/* Utilities */
+/*************/
+
+struct ath_chanctx* ath_is_go_chanctx_present(struct ath_softc *sc)
+{
+ struct ath_chanctx *ctx;
+ struct ath_vif *avp;
+ struct ieee80211_vif *vif;
+
+ spin_lock_bh(&sc->chan_lock);
+
+ ath_for_each_chanctx(sc, ctx) {
+ if (!ctx->active)
+ continue;
+
+ list_for_each_entry(avp, &ctx->vifs, list) {
+ vif = avp->vif;
+
+ if (ieee80211_vif_type_p2p(vif) == NL80211_IFTYPE_P2P_GO) {
+ spin_unlock_bh(&sc->chan_lock);
+ return ctx;
+ }
+ }
+ }
+
+ spin_unlock_bh(&sc->chan_lock);
+ return NULL;
+}
+
/**********************************************************/
/* Functions to handle the channel context state machine. */
/**********************************************************/
@@ -171,7 +202,7 @@ static const char *chanctx_event_string(enum ath_chanctx_event ev)
case_rtn_string(ATH_CHANCTX_EVENT_BEACON_SENT);
case_rtn_string(ATH_CHANCTX_EVENT_TSF_TIMER);
case_rtn_string(ATH_CHANCTX_EVENT_BEACON_RECEIVED);
- case_rtn_string(ATH_CHANCTX_EVENT_ASSOC);
+ case_rtn_string(ATH_CHANCTX_EVENT_AUTHORIZED);
case_rtn_string(ATH_CHANCTX_EVENT_SWITCH);
case_rtn_string(ATH_CHANCTX_EVENT_ASSIGN);
case_rtn_string(ATH_CHANCTX_EVENT_UNASSIGN);
@@ -198,6 +229,7 @@ static const char *chanctx_state_string(enum ath_chanctx_state state)
void ath_chanctx_check_active(struct ath_softc *sc, struct ath_chanctx *ctx)
{
struct ath_common *common = ath9k_hw_common(sc->sc_ah);
+ struct ath_chanctx *ictx;
struct ath_vif *avp;
bool active = false;
u8 n_active = 0;
@@ -205,6 +237,28 @@ void ath_chanctx_check_active(struct ath_softc *sc, struct ath_chanctx *ctx)
if (!ctx)
return;
+ if (ctx == &sc->offchannel.chan) {
+ spin_lock_bh(&sc->chan_lock);
+
+ if (likely(sc->sched.channel_switch_time))
+ ctx->flush_timeout =
+ usecs_to_jiffies(sc->sched.channel_switch_time);
+ else
+ ctx->flush_timeout =
+ msecs_to_jiffies(10);
+
+ spin_unlock_bh(&sc->chan_lock);
+
+ /*
+ * There is no need to iterate over the
+ * active/assigned channel contexts if
+ * the current context is offchannel.
+ */
+ return;
+ }
+
+ ictx = ctx;
+
list_for_each_entry(avp, &ctx->vifs, list) {
struct ieee80211_vif *vif = avp->vif;
@@ -227,12 +281,23 @@ void ath_chanctx_check_active(struct ath_softc *sc, struct ath_chanctx *ctx)
n_active++;
}
+ spin_lock_bh(&sc->chan_lock);
+
if (n_active <= 1) {
+ ictx->flush_timeout = HZ / 5;
clear_bit(ATH_OP_MULTI_CHANNEL, &common->op_flags);
+ spin_unlock_bh(&sc->chan_lock);
return;
}
- if (test_and_set_bit(ATH_OP_MULTI_CHANNEL, &common->op_flags))
+
+ ictx->flush_timeout = usecs_to_jiffies(sc->sched.channel_switch_time);
+
+ if (test_and_set_bit(ATH_OP_MULTI_CHANNEL, &common->op_flags)) {
+ spin_unlock_bh(&sc->chan_lock);
return;
+ }
+
+ spin_unlock_bh(&sc->chan_lock);
if (ath9k_is_chanctx_enabled()) {
ath_chanctx_event(sc, NULL,
@@ -301,6 +366,111 @@ static void ath_chanctx_setup_timer(struct ath_softc *sc, u32 tsf_time)
"Setup chanctx timer with timeout: %d ms\n", jiffies_to_msecs(tsf_time));
}
+static void ath_chanctx_handle_bmiss(struct ath_softc *sc,
+ struct ath_chanctx *ctx,
+ struct ath_vif *avp)
+{
+ /*
+ * Clear the extend_absence flag if it had been
+ * set during the previous beacon transmission,
+ * since we need to revert to the normal NoA
+ * schedule.
+ */
+ if (ctx->active && sc->sched.extend_absence) {
+ avp->noa_duration = 0;
+ sc->sched.extend_absence = false;
+ }
+
+ /* If at least two consecutive beacons were missed on the STA
+ * chanctx, stay on the STA channel for one extra beacon period,
+ * to resync the timer properly.
+ */
+ if (ctx->active && sc->sched.beacon_miss >= 2) {
+ avp->noa_duration = 0;
+ sc->sched.extend_absence = true;
+ }
+}
+
+static void ath_chanctx_offchannel_noa(struct ath_softc *sc,
+ struct ath_chanctx *ctx,
+ struct ath_vif *avp,
+ u32 tsf_time)
+{
+ struct ath_common *common = ath9k_hw_common(sc->sc_ah);
+
+ avp->noa_index++;
+ avp->offchannel_start = tsf_time;
+ avp->offchannel_duration = sc->sched.offchannel_duration;
+
+ ath_dbg(common, CHAN_CTX,
+ "offchannel noa_duration: %d, noa_start: %d, noa_index: %d\n",
+ avp->offchannel_duration,
+ avp->offchannel_start,
+ avp->noa_index);
+
+ /*
+ * When multiple contexts are active, the NoA
+ * has to be recalculated and advertised after
+ * an offchannel operation.
+ */
+ if (ctx->active && avp->noa_duration)
+ avp->noa_duration = 0;
+}
+
+static void ath_chanctx_set_periodic_noa(struct ath_softc *sc,
+ struct ath_vif *avp,
+ struct ath_beacon_config *cur_conf,
+ u32 tsf_time,
+ u32 beacon_int)
+{
+ struct ath_common *common = ath9k_hw_common(sc->sc_ah);
+
+ avp->noa_index++;
+ avp->noa_start = tsf_time;
+
+ if (sc->sched.extend_absence)
+ avp->noa_duration = (3 * beacon_int / 2) +
+ sc->sched.channel_switch_time;
+ else
+ avp->noa_duration =
+ TU_TO_USEC(cur_conf->beacon_interval) / 2 +
+ sc->sched.channel_switch_time;
+
+ if (test_bit(ATH_OP_SCANNING, &common->op_flags) ||
+ sc->sched.extend_absence)
+ avp->periodic_noa = false;
+ else
+ avp->periodic_noa = true;
+
+ ath_dbg(common, CHAN_CTX,
+ "noa_duration: %d, noa_start: %d, noa_index: %d, periodic: %d\n",
+ avp->noa_duration,
+ avp->noa_start,
+ avp->noa_index,
+ 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)
{
@@ -327,6 +497,14 @@ void ath_chanctx_event(struct ath_softc *sc, struct ieee80211_vif *vif,
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");
@@ -356,6 +534,24 @@ void ath_chanctx_event(struct ath_softc *sc, struct ieee80211_vif *vif,
"Move chanctx state from WAIT_FOR_TIMER to WAIT_FOR_BEACON\n");
}
+ if (sc->sched.mgd_prepare_tx)
+ sc->sched.state = ATH_CHANCTX_STATE_WAIT_FOR_BEACON;
+
+ /*
+ * When a context becomes inactive, for example,
+ * disassociation of a station context, the NoA
+ * attribute needs to be removed from subsequent
+ * beacons.
+ */
+ if (!ctx->active && avp->noa_duration &&
+ sc->sched.state != ATH_CHANCTX_STATE_WAIT_FOR_BEACON) {
+ avp->noa_duration = 0;
+ avp->periodic_noa = false;
+
+ ath_dbg(common, CHAN_CTX,
+ "Clearing NoA schedule\n");
+ }
+
if (sc->sched.state != ATH_CHANCTX_STATE_WAIT_FOR_BEACON)
break;
@@ -378,45 +574,22 @@ void ath_chanctx_event(struct ath_softc *sc, struct ieee80211_vif *vif,
* values and increment the index.
*/
if (sc->next_chan == &sc->offchannel.chan) {
- avp->noa_index++;
- avp->offchannel_start = tsf_time;
- avp->offchannel_duration = sc->sched.offchannel_duration;
-
- ath_dbg(common, CHAN_CTX,
- "offchannel noa_duration: %d, noa_start: %d, noa_index: %d\n",
- avp->offchannel_duration,
- avp->offchannel_start,
- avp->noa_index);
-
- /*
- * When multiple contexts are active, the NoA
- * has to be recalculated and advertised after
- * an offchannel operation.
- */
- if (ctx->active && avp->noa_duration)
- avp->noa_duration = 0;
-
+ ath_chanctx_offchannel_noa(sc, ctx, avp, tsf_time);
break;
}
- /*
- * Clear the extend_absence flag if it had been
- * set during the previous beacon transmission,
- * since we need to revert to the normal NoA
- * schedule.
- */
- if (ctx->active && sc->sched.extend_absence) {
- avp->noa_duration = 0;
- sc->sched.extend_absence = false;
- }
+ ath_chanctx_handle_bmiss(sc, ctx, avp);
- /* If at least two consecutive beacons were missed on the STA
- * chanctx, stay on the STA channel for one extra beacon period,
- * to resync the timer properly.
+ /*
+ * 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 (ctx->active && sc->sched.beacon_miss >= 2) {
- avp->noa_duration = 0;
- sc->sched.extend_absence = true;
+ 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 */
@@ -429,31 +602,9 @@ void ath_chanctx_event(struct ath_softc *sc, struct ieee80211_vif *vif,
* announcement.
*/
if (ctx->active &&
- (!avp->noa_duration || sc->sched.force_noa_update)) {
- avp->noa_index++;
- avp->noa_start = tsf_time;
-
- if (sc->sched.extend_absence)
- avp->noa_duration = (3 * beacon_int / 2) +
- sc->sched.channel_switch_time;
- else
- avp->noa_duration =
- TU_TO_USEC(cur_conf->beacon_interval) / 2 +
- sc->sched.channel_switch_time;
-
- if (test_bit(ATH_OP_SCANNING, &common->op_flags) ||
- sc->sched.extend_absence)
- avp->periodic_noa = false;
- else
- avp->periodic_noa = true;
-
- ath_dbg(common, CHAN_CTX,
- "noa_duration: %d, noa_start: %d, noa_index: %d, periodic: %d\n",
- avp->noa_duration,
- avp->noa_start,
- avp->noa_index,
- avp->periodic_noa);
- }
+ (!avp->noa_duration || sc->sched.force_noa_update))
+ ath_chanctx_set_periodic_noa(sc, avp, cur_conf,
+ tsf_time, beacon_int);
if (ctx->active && sc->sched.force_noa_update)
sc->sched.force_noa_update = false;
@@ -467,6 +618,15 @@ void ath_chanctx_event(struct ath_softc *sc, struct ieee80211_vif *vif,
}
sc->sched.beacon_pending = false;
+
+ if (sc->sched.mgd_prepare_tx) {
+ sc->sched.mgd_prepare_tx = false;
+ complete(&sc->go_beacon);
+ ath_dbg(common, CHAN_CTX,
+ "Beacon sent, complete go_beacon\n");
+ break;
+ }
+
if (sc->sched.state != ATH_CHANCTX_STATE_WAIT_FOR_BEACON)
break;
@@ -495,10 +655,16 @@ void ath_chanctx_event(struct ath_softc *sc, struct ieee80211_vif *vif,
sc->cur_chan == &sc->offchannel.chan)
break;
- ath_chanctx_adjust_tbtt_delta(sc);
sc->sched.beacon_pending = false;
sc->sched.beacon_miss = 0;
+ if (sc->sched.state == ATH_CHANCTX_STATE_FORCE_ACTIVE ||
+ !sc->sched.beacon_adjust ||
+ !sc->cur_chan->tsf_val)
+ break;
+
+ ath_chanctx_adjust_tbtt_delta(sc);
+
/* TSF time might have been updated by the incoming beacon,
* need update the channel switch timer to reflect the change.
*/
@@ -507,10 +673,10 @@ void ath_chanctx_event(struct ath_softc *sc, struct ieee80211_vif *vif,
ath9k_hw_get_tsf_offset(&sc->cur_chan->tsf_ts, NULL);
tsf_time += ath9k_hw_gettsf32(ah);
-
+ sc->sched.beacon_adjust = false;
ath_chanctx_setup_timer(sc, tsf_time);
break;
- case ATH_CHANCTX_EVENT_ASSOC:
+ case ATH_CHANCTX_EVENT_AUTHORIZED:
if (sc->sched.state != ATH_CHANCTX_STATE_FORCE_ACTIVE ||
avp->chanctx != sc->cur_chan)
break;
@@ -552,6 +718,7 @@ void ath_chanctx_event(struct ath_softc *sc, struct ieee80211_vif *vif,
ath_chanctx_setup_timer(sc, tsf_time);
sc->sched.beacon_pending = true;
+ sc->sched.beacon_adjust = true;
break;
case ATH_CHANCTX_EVENT_ENABLE_MULTICHANNEL:
if (sc->cur_chan == &sc->offchannel.chan ||
@@ -578,22 +745,6 @@ void ath_chanctx_event(struct ath_softc *sc, struct ieee80211_vif *vif,
ieee80211_queue_work(sc->hw, &sc->chanctx_work);
break;
case ATH_CHANCTX_EVENT_ASSIGN:
- /*
- * When adding a new channel context, check if a scan
- * is in progress and abort it since the addition of
- * a new channel context is usually followed by VIF
- * assignment, in which case we have to start multi-channel
- * operation.
- */
- if (test_bit(ATH_OP_SCANNING, &common->op_flags)) {
- ath_dbg(common, CHAN_CTX,
- "Aborting HW scan to add new context\n");
-
- spin_unlock_bh(&sc->chan_lock);
- del_timer_sync(&sc->offchannel.timer);
- ath_scan_complete(sc, true);
- spin_lock_bh(&sc->chan_lock);
- }
break;
case ATH_CHANCTX_EVENT_CHANGE:
break;
@@ -751,6 +902,11 @@ void ath_offchannel_next(struct ath_softc *sc)
sc->offchannel.state = ATH_OFFCHANNEL_ROC_START;
ath_chanctx_offchan_switch(sc, sc->offchannel.roc_chan);
} else {
+ spin_lock_bh(&sc->chan_lock);
+ sc->sched.offchannel_pending = false;
+ sc->sched.wait_switch = false;
+ spin_unlock_bh(&sc->chan_lock);
+
ath_chanctx_switch(sc, ath_chanctx_get_oper_chan(sc, false),
NULL);
sc->offchannel.state = ATH_OFFCHANNEL_IDLE;
@@ -770,8 +926,7 @@ void ath_roc_complete(struct ath_softc *sc, bool abort)
sc->offchannel.roc_vif = NULL;
sc->offchannel.roc_chan = NULL;
- if (!abort)
- ieee80211_remain_on_channel_expired(sc->hw);
+ ieee80211_remain_on_channel_expired(sc->hw);
ath_offchannel_next(sc);
ath9k_ps_restore(sc);
}
@@ -808,7 +963,7 @@ static void ath_scan_send_probe(struct ath_softc *sc,
struct ieee80211_tx_info *info;
int band = sc->offchannel.chan.chandef.chan->band;
- skb = ieee80211_probereq_get(sc->hw, vif,
+ skb = ieee80211_probereq_get(sc->hw, vif->addr,
ssid->ssid, ssid->ssid_len, req->ie_len);
if (!skb)
return;
@@ -902,9 +1057,8 @@ static void ath_offchannel_timer(unsigned long data)
break;
case ATH_OFFCHANNEL_ROC_START:
case ATH_OFFCHANNEL_ROC_WAIT:
- ctx = ath_chanctx_get_oper_chan(sc, false);
sc->offchannel.state = ATH_OFFCHANNEL_ROC_DONE;
- ath_chanctx_switch(sc, ctx, NULL);
+ ath_roc_complete(sc, false);
break;
default:
break;
@@ -1034,7 +1188,6 @@ static void ath_offchannel_channel_change(struct ath_softc *sc)
ieee80211_ready_on_channel(sc->hw);
break;
case ATH_OFFCHANNEL_ROC_DONE:
- ath_roc_complete(sc, false);
break;
default:
break;
@@ -1082,10 +1235,11 @@ void ath_chanctx_set_next(struct ath_softc *sc, bool force)
ath9k_chanctx_stop_queues(sc, sc->cur_chan);
queues_stopped = true;
- __ath9k_flush(sc->hw, ~0, true);
+ __ath9k_flush(sc->hw, ~0, true, false, false);
if (ath_chanctx_send_ps_frame(sc, true))
- __ath9k_flush(sc->hw, BIT(IEEE80211_AC_VO), false);
+ __ath9k_flush(sc->hw, BIT(IEEE80211_AC_VO),
+ false, false, false);
send_ps = true;
spin_lock_bh(&sc->chan_lock);
@@ -1177,6 +1331,8 @@ void ath9k_init_channel_context(struct ath_softc *sc)
(unsigned long)sc);
setup_timer(&sc->sched.timer, ath_chanctx_timer,
(unsigned long)sc);
+
+ init_completion(&sc->go_beacon);
}
void ath9k_deinit_channel_context(struct ath_softc *sc)
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