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path: root/drivers/net/wireless/ath/ath9k/beacon.c
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Diffstat (limited to 'drivers/net/wireless/ath/ath9k/beacon.c')
-rw-r--r--drivers/net/wireless/ath/ath9k/beacon.c238
1 files changed, 143 insertions, 95 deletions
diff --git a/drivers/net/wireless/ath/ath9k/beacon.c b/drivers/net/wireless/ath/ath9k/beacon.c
index 6d2a545fc35e..637dbc5f7b67 100644
--- a/drivers/net/wireless/ath/ath9k/beacon.c
+++ b/drivers/net/wireless/ath/ath9k/beacon.c
@@ -57,8 +57,8 @@ int ath_beaconq_config(struct ath_softc *sc)
/*
* Associates the beacon frame buffer with a transmit descriptor. Will set
- * up all required antenna switch parameters, rate codes, and channel flags.
- * Beacons are always sent out at the lowest rate, and are not retried.
+ * up rate codes, and channel flags. Beacons are always sent out at the
+ * lowest rate, and are not retried.
*/
static void ath_beacon_setup(struct ath_softc *sc, struct ath_vif *avp,
struct ath_buf *bf, int rateidx)
@@ -68,7 +68,7 @@ static void ath_beacon_setup(struct ath_softc *sc, struct ath_vif *avp,
struct ath_common *common = ath9k_hw_common(ah);
struct ath_desc *ds;
struct ath9k_11n_rate_series series[4];
- int flags, antenna, ctsrate = 0, ctsduration = 0;
+ int flags, ctsrate = 0, ctsduration = 0;
struct ieee80211_supported_band *sband;
u8 rate = 0;
@@ -76,12 +76,6 @@ static void ath_beacon_setup(struct ath_softc *sc, struct ath_vif *avp,
flags = ATH9K_TXDESC_NOACK;
ds->ds_link = 0;
- /*
- * Switch antenna every beacon.
- * Should only switch every beacon period, not for every SWBA
- * XXX assumes two antennae
- */
- antenna = ((sc->beacon.ast_be_xmit / sc->nbcnvifs) & 1 ? 2 : 1);
sband = &sc->sbands[common->hw->conf.channel->band];
rate = sband->bitrates[rateidx].hw_value;
@@ -278,7 +272,7 @@ int ath_beacon_alloc(struct ath_softc *sc, struct ieee80211_vif *vif)
return -ENOMEM;
tstamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
- sc->beacon.bc_tstamp = le64_to_cpu(tstamp);
+ sc->beacon.bc_tstamp = (u32) le64_to_cpu(tstamp);
/* Calculate a TSF adjustment factor required for staggered beacons. */
if (avp->av_bslot > 0) {
u64 tsfadjust;
@@ -294,8 +288,8 @@ int ath_beacon_alloc(struct ath_softc *sc, struct ieee80211_vif *vif)
* adjustment. Other slots are adjusted to get the timestamp
* close to the TBTT for the BSS.
*/
- tsfadjust = intval * avp->av_bslot / ATH_BCBUF;
- avp->tsf_adjust = cpu_to_le64(TU_TO_USEC(tsfadjust));
+ tsfadjust = TU_TO_USEC(intval * avp->av_bslot) / ATH_BCBUF;
+ avp->tsf_adjust = cpu_to_le64(tsfadjust);
ath_dbg(common, ATH_DBG_BEACON,
"stagger beacons, bslot %d intval %u tsfadjust %llu\n",
@@ -326,9 +320,11 @@ void ath_beacon_return(struct ath_softc *sc, struct ath_vif *avp)
if (avp->av_bcbuf != NULL) {
struct ath_buf *bf;
+ avp->is_bslot_active = false;
if (avp->av_bslot != -1) {
sc->beacon.bslot[avp->av_bslot] = NULL;
sc->nbcnvifs--;
+ avp->av_bslot = -1;
}
bf = avp->av_bcbuf;
@@ -369,12 +365,13 @@ void ath_beacon_tasklet(unsigned long data)
if (ath9k_hw_numtxpending(ah, sc->beacon.beaconq) != 0) {
sc->beacon.bmisscnt++;
- if (sc->beacon.bmisscnt < BSTUCK_THRESH) {
+ if (sc->beacon.bmisscnt < BSTUCK_THRESH * sc->nbcnvifs) {
ath_dbg(common, ATH_DBG_BSTUCK,
"missed %u consecutive beacons\n",
sc->beacon.bmisscnt);
ath9k_hw_stop_dma_queue(ah, sc->beacon.beaconq);
- ath9k_hw_bstuck_nfcal(ah);
+ if (sc->beacon.bmisscnt > 3)
+ ath9k_hw_bstuck_nfcal(ah);
} else if (sc->beacon.bmisscnt >= BSTUCK_THRESH) {
ath_dbg(common, ATH_DBG_BSTUCK,
"beacon is officially stuck\n");
@@ -385,13 +382,6 @@ void ath_beacon_tasklet(unsigned long data)
return;
}
- if (sc->beacon.bmisscnt != 0) {
- ath_dbg(common, ATH_DBG_BSTUCK,
- "resume beacon xmit after %u misses\n",
- sc->beacon.bmisscnt);
- sc->beacon.bmisscnt = 0;
- }
-
/*
* Generate beacon frames. we are sending frames
* staggered so calculate the slot for this frame based
@@ -401,21 +391,14 @@ void ath_beacon_tasklet(unsigned long data)
intval = cur_conf->beacon_interval ? : ATH_DEFAULT_BINTVAL;
tsf = ath9k_hw_gettsf64(ah);
- tsftu = TSF_TO_TU(tsf>>32, tsf);
- slot = ((tsftu % intval) * ATH_BCBUF) / intval;
- /*
- * Reverse the slot order to get slot 0 on the TBTT offset that does
- * not require TSF adjustment and other slots adding
- * slot/ATH_BCBUF * beacon_int to timestamp. For example, with
- * ATH_BCBUF = 4, we process beacon slots as follows: 3 2 1 0 3 2 1 ..
- * and slot 0 is at correct offset to TBTT.
- */
- slot = ATH_BCBUF - slot - 1;
+ tsf += TU_TO_USEC(ah->config.sw_beacon_response_time);
+ tsftu = TSF_TO_TU((tsf * ATH_BCBUF) >>32, tsf * ATH_BCBUF);
+ slot = (tsftu % (intval * ATH_BCBUF)) / intval;
vif = sc->beacon.bslot[slot];
ath_dbg(common, ATH_DBG_BEACON,
"slot %d [tsf %llu tsftu %u intval %u] vif %p\n",
- slot, tsf, tsftu, intval, vif);
+ slot, tsf, tsftu / ATH_BCBUF, intval, vif);
bfaddr = 0;
if (vif) {
@@ -424,6 +407,13 @@ void ath_beacon_tasklet(unsigned long data)
bfaddr = bf->bf_daddr;
bc = 1;
}
+
+ if (sc->beacon.bmisscnt != 0) {
+ ath_dbg(common, ATH_DBG_BSTUCK,
+ "resume beacon xmit after %u misses\n",
+ sc->beacon.bmisscnt);
+ sc->beacon.bmisscnt = 0;
+ }
}
/*
@@ -463,13 +453,17 @@ static void ath9k_beacon_init(struct ath_softc *sc,
u32 next_beacon,
u32 beacon_period)
{
- if (beacon_period & ATH9K_BEACON_RESET_TSF)
+ if (sc->sc_flags & SC_OP_TSF_RESET) {
ath9k_ps_wakeup(sc);
+ ath9k_hw_reset_tsf(sc->sc_ah);
+ }
ath9k_hw_beaconinit(sc->sc_ah, next_beacon, beacon_period);
- if (beacon_period & ATH9K_BEACON_RESET_TSF)
+ if (sc->sc_flags & SC_OP_TSF_RESET) {
ath9k_ps_restore(sc);
+ sc->sc_flags &= ~SC_OP_TSF_RESET;
+ }
}
/*
@@ -484,18 +478,14 @@ static void ath_beacon_config_ap(struct ath_softc *sc,
u32 nexttbtt, intval;
/* NB: the beacon interval is kept internally in TU's */
- intval = conf->beacon_interval & ATH9K_BEACON_PERIOD;
+ intval = TU_TO_USEC(conf->beacon_interval & ATH9K_BEACON_PERIOD);
intval /= ATH_BCBUF; /* for staggered beacons */
nexttbtt = intval;
- if (sc->sc_flags & SC_OP_TSF_RESET)
- intval |= ATH9K_BEACON_RESET_TSF;
-
/*
* In AP mode we enable the beacon timers and SWBA interrupts to
* prepare beacon frames.
*/
- intval |= ATH9K_BEACON_ENA;
ah->imask |= ATH9K_INT_SWBA;
ath_beaconq_config(sc);
@@ -505,11 +495,6 @@ static void ath_beacon_config_ap(struct ath_softc *sc,
ath9k_beacon_init(sc, nexttbtt, intval);
sc->beacon.bmisscnt = 0;
ath9k_hw_set_interrupts(ah, ah->imask);
-
- /* Clear the reset TSF flag, so that subsequent beacon updation
- will not reset the HW TSF. */
-
- sc->sc_flags &= ~SC_OP_TSF_RESET;
}
/*
@@ -635,7 +620,13 @@ static void ath_beacon_config_sta(struct ath_softc *sc,
ath9k_hw_disable_interrupts(ah);
ath9k_hw_set_sta_beacon_timers(ah, &bs);
ah->imask |= ATH9K_INT_BMISS;
- ath9k_hw_set_interrupts(ah, ah->imask);
+
+ /*
+ * If the beacon config is called beacause of TSFOOR,
+ * Interrupts will be enabled back at the end of ath9k_tasklet
+ */
+ if (!(sc->ps_flags & PS_TSFOOR_SYNC))
+ ath9k_hw_set_interrupts(ah, ah->imask);
}
static void ath_beacon_config_adhoc(struct ath_softc *sc,
@@ -643,25 +634,20 @@ static void ath_beacon_config_adhoc(struct ath_softc *sc,
{
struct ath_hw *ah = sc->sc_ah;
struct ath_common *common = ath9k_hw_common(ah);
- u64 tsf;
- u32 tsftu, intval, nexttbtt;
-
- intval = conf->beacon_interval & ATH9K_BEACON_PERIOD;
-
-
- /* Pull nexttbtt forward to reflect the current TSF */
-
- nexttbtt = TSF_TO_TU(sc->beacon.bc_tstamp >> 32, sc->beacon.bc_tstamp);
- if (nexttbtt == 0)
- nexttbtt = intval;
- else if (intval)
- nexttbtt = roundup(nexttbtt, intval);
-
- tsf = ath9k_hw_gettsf64(ah);
- tsftu = TSF_TO_TU((u32)(tsf>>32), (u32)tsf) + FUDGE;
- do {
- nexttbtt += intval;
- } while (nexttbtt < tsftu);
+ u32 tsf, delta, intval, nexttbtt;
+
+ tsf = ath9k_hw_gettsf32(ah) + TU_TO_USEC(FUDGE);
+ intval = TU_TO_USEC(conf->beacon_interval & ATH9K_BEACON_PERIOD);
+
+ if (!sc->beacon.bc_tstamp)
+ nexttbtt = tsf + intval;
+ else {
+ if (tsf > sc->beacon.bc_tstamp)
+ delta = (tsf - sc->beacon.bc_tstamp);
+ else
+ delta = (tsf + 1 + (~0U - sc->beacon.bc_tstamp));
+ nexttbtt = tsf + roundup(delta, intval);
+ }
ath_dbg(common, ATH_DBG_BEACON,
"IBSS nexttbtt %u intval %u (%u)\n",
@@ -672,7 +658,6 @@ static void ath_beacon_config_adhoc(struct ath_softc *sc,
* if we need to manually prepare beacon frames. Otherwise we use a
* self-linked tx descriptor and let the hardware deal with things.
*/
- intval |= ATH9K_BEACON_ENA;
ah->imask |= ATH9K_INT_SWBA;
ath_beaconq_config(sc);
@@ -682,25 +667,71 @@ static void ath_beacon_config_adhoc(struct ath_softc *sc,
ath9k_hw_disable_interrupts(ah);
ath9k_beacon_init(sc, nexttbtt, intval);
sc->beacon.bmisscnt = 0;
- ath9k_hw_set_interrupts(ah, ah->imask);
+ /*
+ * If the beacon config is called beacause of TSFOOR,
+ * Interrupts will be enabled back at the end of ath9k_tasklet
+ */
+ if (!(sc->ps_flags & PS_TSFOOR_SYNC))
+ ath9k_hw_set_interrupts(ah, ah->imask);
}
-void ath_beacon_config(struct ath_softc *sc, struct ieee80211_vif *vif)
+static bool ath9k_allow_beacon_config(struct ath_softc *sc,
+ struct ieee80211_vif *vif)
{
struct ath_beacon_config *cur_conf = &sc->cur_beacon_conf;
struct ath_common *common = ath9k_hw_common(sc->sc_ah);
- enum nl80211_iftype iftype;
+ struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
+ struct ath_vif *avp = (void *)vif->drv_priv;
- /* Setup the beacon configuration parameters */
- if (vif) {
- struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
- iftype = vif->type;
- cur_conf->beacon_interval = bss_conf->beacon_int;
- cur_conf->dtim_period = bss_conf->dtim_period;
- } else {
- iftype = sc->sc_ah->opmode;
+ /*
+ * Can not have different beacon interval on multiple
+ * AP interface case
+ */
+ if ((sc->sc_ah->opmode == NL80211_IFTYPE_AP) &&
+ (sc->nbcnvifs > 1) &&
+ (vif->type == NL80211_IFTYPE_AP) &&
+ (cur_conf->beacon_interval != bss_conf->beacon_int)) {
+ ath_dbg(common, ATH_DBG_CONFIG,
+ "Changing beacon interval of multiple \
+ AP interfaces !\n");
+ return false;
}
+ /*
+ * Can not configure station vif's beacon config
+ * while on AP opmode
+ */
+ if ((sc->sc_ah->opmode == NL80211_IFTYPE_AP) &&
+ (vif->type != NL80211_IFTYPE_AP)) {
+ ath_dbg(common, ATH_DBG_CONFIG,
+ "STA vif's beacon not allowed on AP mode\n");
+ return false;
+ }
+ /*
+ * Do not allow beacon config if HW was already configured
+ * with another STA vif
+ */
+ if ((sc->sc_ah->opmode == NL80211_IFTYPE_STATION) &&
+ (vif->type == NL80211_IFTYPE_STATION) &&
+ (sc->sc_flags & SC_OP_BEACONS) &&
+ !avp->primary_sta_vif) {
+ ath_dbg(common, ATH_DBG_CONFIG,
+ "Beacon already configured for a station interface\n");
+ return false;
+ }
+ return true;
+}
+void ath_beacon_config(struct ath_softc *sc, struct ieee80211_vif *vif)
+{
+ struct ath_beacon_config *cur_conf = &sc->cur_beacon_conf;
+ struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
+
+ if (!ath9k_allow_beacon_config(sc, vif))
+ return;
+
+ /* Setup the beacon configuration parameters */
+ cur_conf->beacon_interval = bss_conf->beacon_int;
+ cur_conf->dtim_period = bss_conf->dtim_period;
cur_conf->listen_interval = 1;
cur_conf->dtim_count = 1;
cur_conf->bmiss_timeout =
@@ -723,9 +754,37 @@ void ath_beacon_config(struct ath_softc *sc, struct ieee80211_vif *vif)
if (cur_conf->dtim_period == 0)
cur_conf->dtim_period = 1;
- switch (iftype) {
+ ath_set_beacon(sc);
+}
+
+static bool ath_has_valid_bslot(struct ath_softc *sc)
+{
+ struct ath_vif *avp;
+ int slot;
+ bool found = false;
+
+ for (slot = 0; slot < ATH_BCBUF; slot++) {
+ if (sc->beacon.bslot[slot]) {
+ avp = (void *)sc->beacon.bslot[slot]->drv_priv;
+ if (avp->is_bslot_active) {
+ found = true;
+ break;
+ }
+ }
+ }
+ return found;
+}
+
+
+void ath_set_beacon(struct ath_softc *sc)
+{
+ struct ath_common *common = ath9k_hw_common(sc->sc_ah);
+ struct ath_beacon_config *cur_conf = &sc->cur_beacon_conf;
+
+ switch (sc->sc_ah->opmode) {
case NL80211_IFTYPE_AP:
- ath_beacon_config_ap(sc, cur_conf);
+ if (ath_has_valid_bslot(sc))
+ ath_beacon_config_ap(sc, cur_conf);
break;
case NL80211_IFTYPE_ADHOC:
case NL80211_IFTYPE_MESH_POINT:
@@ -746,26 +805,15 @@ void ath_beacon_config(struct ath_softc *sc, struct ieee80211_vif *vif)
void ath9k_set_beaconing_status(struct ath_softc *sc, bool status)
{
struct ath_hw *ah = sc->sc_ah;
- struct ath_vif *avp;
- int slot;
- bool found = false;
+
+ if (!ath_has_valid_bslot(sc))
+ return;
ath9k_ps_wakeup(sc);
if (status) {
- for (slot = 0; slot < ATH_BCBUF; slot++) {
- if (sc->beacon.bslot[slot]) {
- avp = (void *)sc->beacon.bslot[slot]->drv_priv;
- if (avp->is_bslot_active) {
- found = true;
- break;
- }
- }
- }
- if (found) {
- /* Re-enable beaconing */
- ah->imask |= ATH9K_INT_SWBA;
- ath9k_hw_set_interrupts(ah, ah->imask);
- }
+ /* Re-enable beaconing */
+ ah->imask |= ATH9K_INT_SWBA;
+ ath9k_hw_set_interrupts(ah, ah->imask);
} else {
/* Disable SWBA interrupt */
ah->imask &= ~ATH9K_INT_SWBA;