ath9k: Cleanup the beacon tasklet

Remove unused variables, use a helper function to choose
the slot and reset beaconing status at one place.

Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/drivers/net/wireless/ath/ath9k/ath9k.h b/drivers/net/wireless/ath/ath9k/ath9k.h
index 4aca1e5..41219a5 100644 (file)
--- a/drivers/net/wireless/ath/ath9k/ath9k.h
+++ b/drivers/net/wireless/ath/ath9k/ath9k.h
@@ -401,7 +401,6 @@ struct ath_beacon {
 
        u32 beaconq;
        u32 bmisscnt;
-       u32 ast_be_xmit;
        u32 bc_tstamp;
        struct ieee80211_vif *bslot[ATH_BCBUF];
        int slottime;
@@ -415,7 +414,7 @@ struct ath_beacon {
        bool tx_last;
 };
 
-void ath_beacon_tasklet(unsigned long data);
+void ath9k_beacon_tasklet(unsigned long data);
 bool ath9k_allow_beacon_config(struct ath_softc *sc, struct ieee80211_vif *vif);
 void ath9k_beacon_config(struct ath_softc *sc, struct ieee80211_vif *vif,
                         u32 changed);

diff --git a/drivers/net/wireless/ath/ath9k/beacon.c b/drivers/net/wireless/ath/ath9k/beacon.c
index f2a2131..006ae99 100644 (file)
--- a/drivers/net/wireless/ath/ath9k/beacon.c
+++ b/drivers/net/wireless/ath/ath9k/beacon.c
@@ -68,7 +68,7 @@ static void ath9k_beaconq_config(struct ath_softc *sc)
  *  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 ieee80211_vif *vif,
+static void ath9k_beacon_setup(struct ath_softc *sc, struct ieee80211_vif *vif,
                             struct ath_buf *bf, int rateidx)
 {
        struct sk_buff *skb = bf->bf_mpdu;
@@ -79,8 +79,6 @@ static void ath_beacon_setup(struct ath_softc *sc, struct ieee80211_vif *vif,
        u8 chainmask = ah->txchainmask;
        u8 rate = 0;
 
-       ath9k_reset_beacon_status(sc);
-
        sband = &sc->sbands[common->hw->conf.channel->band];
        rate = sband->bitrates[rateidx].hw_value;
        if (vif->bss_conf.use_short_preamble)
@@ -109,7 +107,7 @@ static void ath_beacon_setup(struct ath_softc *sc, struct ieee80211_vif *vif,
        ath9k_hw_set_txdesc(ah, bf->bf_desc, &info);
 }
 
-static void ath_tx_cabq(struct ieee80211_hw *hw, struct sk_buff *skb)
+static void ath9k_tx_cabq(struct ieee80211_hw *hw, struct sk_buff *skb)
 {
        struct ath_softc *sc = hw->priv;
        struct ath_common *common = ath9k_hw_common(sc->sc_ah);
@@ -126,8 +124,8 @@ static void ath_tx_cabq(struct ieee80211_hw *hw, struct sk_buff *skb)
        }
 }
 
-static struct ath_buf *ath_beacon_generate(struct ieee80211_hw *hw,
-                                          struct ieee80211_vif *vif)
+static struct ath_buf *ath9k_beacon_generate(struct ieee80211_hw *hw,
+                                            struct ieee80211_vif *vif)
 {
        struct ath_softc *sc = hw->priv;
        struct ath_common *common = ath9k_hw_common(sc->sc_ah);
@@ -136,15 +134,12 @@ static struct ath_buf *ath_beacon_generate(struct ieee80211_hw *hw,
        struct sk_buff *skb;
        struct ath_txq *cabq = sc->beacon.cabq;
        struct ieee80211_tx_info *info;
+       struct ieee80211_mgmt *mgmt_hdr;
        int cabq_depth;
 
        if (avp->av_bcbuf == NULL)
                return NULL;
 
-       ath9k_reset_beacon_status(sc);
-
-       /* Release the old beacon first */
-
        bf = avp->av_bcbuf;
        skb = bf->bf_mpdu;
        if (skb) {
@@ -154,14 +149,14 @@ static struct ath_buf *ath_beacon_generate(struct ieee80211_hw *hw,
                bf->bf_buf_addr = 0;
        }
 
-       /* Get a new beacon from mac80211 */
-
        skb = ieee80211_beacon_get(hw, vif);
-       bf->bf_mpdu = skb;
        if (skb == NULL)
                return NULL;
-       ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp =
-               avp->tsf_adjust;
+
+       bf->bf_mpdu = skb;
+
+       mgmt_hdr = (struct ieee80211_mgmt *)skb->data;
+       mgmt_hdr->u.beacon.timestamp = avp->tsf_adjust;
 
        info = IEEE80211_SKB_CB(skb);
        if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) {
@@ -207,10 +202,10 @@ static struct ath_buf *ath_beacon_generate(struct ieee80211_hw *hw,
                }
        }
 
-       ath_beacon_setup(sc, vif, bf, info->control.rates[0].idx);
+       ath9k_beacon_setup(sc, vif, bf, info->control.rates[0].idx);
 
        while (skb) {
-               ath_tx_cabq(hw, skb);
+               ath9k_tx_cabq(hw, skb);
                skb = ieee80211_get_buffered_bc(hw, vif);
        }
 
@@ -268,6 +263,33 @@ void ath9k_beacon_remove_slot(struct ath_softc *sc, struct ieee80211_vif *vif)
        tasklet_enable(&sc->bcon_tasklet);
 }
 
+static int ath9k_beacon_choose_slot(struct ath_softc *sc)
+{
+       struct ath_common *common = ath9k_hw_common(sc->sc_ah);
+       struct ath_beacon_config *cur_conf = &sc->cur_beacon_conf;
+       u16 intval;
+       u32 tsftu;
+       u64 tsf;
+       int slot;
+
+       if (sc->sc_ah->opmode != NL80211_IFTYPE_AP) {
+               ath_dbg(common, BEACON, "slot 0, tsf: %llu\n",
+                       ath9k_hw_gettsf64(sc->sc_ah));
+               return 0;
+       }
+
+       intval = cur_conf->beacon_interval ? : ATH_DEFAULT_BINTVAL;
+       tsf = ath9k_hw_gettsf64(sc->sc_ah);
+       tsf += TU_TO_USEC(sc->sc_ah->config.sw_beacon_response_time);
+       tsftu = TSF_TO_TU((tsf * ATH_BCBUF) >>32, tsf * ATH_BCBUF);
+       slot = (tsftu % (intval * ATH_BCBUF)) / intval;
+
+       ath_dbg(common, BEACON, "slot: %d tsf: %llu tsftu: %u\n",
+               slot, tsf, tsftu / ATH_BCBUF);
+
+       return slot;
+}
+
 void ath9k_set_tsfadjust(struct ath_softc *sc, struct ieee80211_vif *vif)
 {
        struct ath_common *common = ath9k_hw_common(sc->sc_ah);
@@ -285,17 +307,15 @@ void ath9k_set_tsfadjust(struct ath_softc *sc, struct ieee80211_vif *vif)
                (unsigned long long)tsfadjust, avp->av_bslot);
 }
 
-void ath_beacon_tasklet(unsigned long data)
+void ath9k_beacon_tasklet(unsigned long data)
 {
        struct ath_softc *sc = (struct ath_softc *)data;
-       struct ath_beacon_config *cur_conf = &sc->cur_beacon_conf;
        struct ath_hw *ah = sc->sc_ah;
        struct ath_common *common = ath9k_hw_common(ah);
        struct ath_buf *bf = NULL;
        struct ieee80211_vif *vif;
        bool edma = !!(ah->caps.hw_caps & ATH9K_HW_CAP_EDMA);
        int slot;
-       u32 bfaddr, bc = 0;
 
        if (work_pending(&sc->hw_reset_work)) {
                ath_dbg(common, RESET,
@@ -331,48 +351,19 @@ void ath_beacon_tasklet(unsigned long data)
                return;
        }
 
-       /*
-        * Generate beacon frames. we are sending frames
-        * staggered so calculate the slot for this frame based
-        * on the tsf to safeguard against missing an swba.
-        */
-
+       slot = ath9k_beacon_choose_slot(sc);
+       vif = sc->beacon.bslot[slot];
 
-       if (ah->opmode == NL80211_IFTYPE_AP) {
-               u16 intval;
-               u32 tsftu;
-               u64 tsf;
+       if (!vif || !vif->bss_conf.enable_beacon)
+               return;
 
-               intval = cur_conf->beacon_interval ? : ATH_DEFAULT_BINTVAL;
-               tsf = ath9k_hw_gettsf64(ah);
-               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];
+       bf = ath9k_beacon_generate(sc->hw, vif);
+       WARN_ON(!bf);
 
-               ath_dbg(common, BEACON,
-                       "slot %d [tsf %llu tsftu %u intval %u] vif %p\n",
-                       slot, tsf, tsftu / ATH_BCBUF, intval, vif);
-       } else {
-               slot = 0;
-               vif = sc->beacon.bslot[slot];
-       }
-
-
-       bfaddr = 0;
-       if (vif) {
-               bf = ath_beacon_generate(sc->hw, vif);
-               if (bf != NULL) {
-                       bfaddr = bf->bf_daddr;
-                       bc = 1;
-               }
-
-               if (sc->beacon.bmisscnt != 0) {
-                       ath_dbg(common, BSTUCK,
-                               "resume beacon xmit after %u misses\n",
-                               sc->beacon.bmisscnt);
-                       sc->beacon.bmisscnt = 0;
-               }
+       if (sc->beacon.bmisscnt != 0) {
+               ath_dbg(common, BSTUCK, "resume beacon xmit after %u misses\n",
+                       sc->beacon.bmisscnt);
+               sc->beacon.bmisscnt = 0;
        }
 
        /*
@@ -392,21 +383,26 @@ void ath_beacon_tasklet(unsigned long data)
         *     set to ATH_BCBUF so this check is a noop.
         */
        if (sc->beacon.updateslot == UPDATE) {
-               sc->beacon.updateslot = COMMIT; /* commit next beacon */
+               sc->beacon.updateslot = COMMIT;
                sc->beacon.slotupdate = slot;
-       } else if (sc->beacon.updateslot == COMMIT && sc->beacon.slotupdate == slot) {
+       } else if (sc->beacon.updateslot == COMMIT &&
+                  sc->beacon.slotupdate == slot) {
                ah->slottime = sc->beacon.slottime;
                ath9k_hw_init_global_settings(ah);
                sc->beacon.updateslot = OK;
        }
-       if (bfaddr != 0) {
+
+       if (bf) {
+               ath9k_reset_beacon_status(sc);
+
+               ath_dbg(common, BEACON,
+                       "Transmitting beacon for slot: %d\n", slot);
+
                /* NB: cabq traffic should already be queued and primed */
-               ath9k_hw_puttxbuf(ah, sc->beacon.beaconq, bfaddr);
+               ath9k_hw_puttxbuf(ah, sc->beacon.beaconq, bf->bf_daddr);
 
                if (!edma)
                        ath9k_hw_txstart(ah, sc->beacon.beaconq);
-
-               sc->beacon.ast_be_xmit += bc;     /* XXX per-vif? */
        }
 }
 

diff --git a/drivers/net/wireless/ath/ath9k/init.c b/drivers/net/wireless/ath/ath9k/init.c
index 181977a..f337121 100644 (file)
--- a/drivers/net/wireless/ath/ath9k/init.c
+++ b/drivers/net/wireless/ath/ath9k/init.c
@@ -559,7 +559,7 @@ static int ath9k_init_softc(u16 devid, struct ath_softc *sc,
        spin_lock_init(&sc->debug.samp_lock);
 #endif
        tasklet_init(&sc->intr_tq, ath9k_tasklet, (unsigned long)sc);
-       tasklet_init(&sc->bcon_tasklet, ath_beacon_tasklet,
+       tasklet_init(&sc->bcon_tasklet, ath9k_beacon_tasklet,
                     (unsigned long)sc);
 
        INIT_WORK(&sc->hw_reset_work, ath_reset_work);