package/mac80211/patches/560-ath9k_optimize_beacon_tx.patch

   1 --- a/drivers/net/wireless/ath/ath9k/beacon.c
   2 +++ b/drivers/net/wireless/ath/ath9k/beacon.c
   3 @@ -357,41 +357,12 @@ void ath_beacon_tasklet(unsigned long da
   4         struct ieee80211_vif *vif;
   5         bool edma = !!(ah->caps.hw_caps & ATH9K_HW_CAP_EDMA);
   6         int slot;
   7 -       u32 bfaddr, bc = 0;
   8 -
   9 -       /*
  10 -        * Check if the previous beacon has gone out.  If
  11 -        * not don't try to post another, skip this period
  12 -        * and wait for the next.  Missed beacons indicate
  13 -        * a problem and should not occur.  If we miss too
  14 -        * many consecutive beacons reset the device.
  15 -        */
  16 -       if (ath9k_hw_numtxpending(ah, sc->beacon.beaconq) != 0) {
  17 -               sc->beacon.bmisscnt++;
  18 -
  19 -               if (sc->beacon.bmisscnt < BSTUCK_THRESH * sc->nbcnvifs) {
  20 -                       ath_dbg(common, BSTUCK,
  21 -                               "missed %u consecutive beacons\n",
  22 -                               sc->beacon.bmisscnt);
  23 -                       ath9k_hw_stop_dma_queue(ah, sc->beacon.beaconq);
  24 -                       if (sc->beacon.bmisscnt > 3)
  25 -                               ath9k_hw_bstuck_nfcal(ah);
  26 -               } else if (sc->beacon.bmisscnt >= BSTUCK_THRESH) {
  27 -                       ath_dbg(common, BSTUCK, "beacon is officially stuck\n");
  28 -                       sc->sc_flags |= SC_OP_TSF_RESET;
  29 -                       ieee80211_queue_work(sc->hw, &sc->hw_reset_work);
  30 -               }
  31 -
  32 -               return;
  33 -       }
  34
  35         /*
  36          * Generate beacon frames. we are sending frames
  37          * staggered so calculate the slot for this frame based
  38          * on the tsf to safeguard against missing an swba.
  39          */
  40 -
  41 -
  42         if (ah->opmode == NL80211_IFTYPE_AP) {
  43                 u16 intval;
  44                 u32 tsftu;
  45 @@ -412,23 +383,6 @@ void ath_beacon_tasklet(unsigned long da
  46                 vif = sc->beacon.bslot[slot];
  47         }
  48
  49 -
  50 -       bfaddr = 0;
  51 -       if (vif) {
  52 -               bf = ath_beacon_generate(sc->hw, vif);
  53 -               if (bf != NULL) {
  54 -                       bfaddr = bf->bf_daddr;
  55 -                       bc = 1;
  56 -               }
  57 -
  58 -               if (sc->beacon.bmisscnt != 0) {
  59 -                       ath_dbg(common, BSTUCK,
  60 -                               "resume beacon xmit after %u misses\n",
  61 -                               sc->beacon.bmisscnt);
  62 -                       sc->beacon.bmisscnt = 0;
  63 -               }
  64 -       }
  65 -
  66         /*
  67          * Handle slot time change when a non-ERP station joins/leaves
  68          * an 11g network.  The 802.11 layer notifies us via callback,
  69 @@ -453,15 +407,54 @@ void ath_beacon_tasklet(unsigned long da
  70                 ath9k_hw_init_global_settings(ah);
  71                 sc->beacon.updateslot = OK;
  72         }
  73 -       if (bfaddr != 0) {
  74 -               /* NB: cabq traffic should already be queued and primed */
  75 -               ath9k_hw_puttxbuf(ah, sc->beacon.beaconq, bfaddr);
  76
  77 -               if (!edma)
  78 -                       ath9k_hw_txstart(ah, sc->beacon.beaconq);
  79 +       if (!vif)
  80 +               return;
  81 +
  82 +       /*
  83 +        * Check if the previous beacon has gone out.  If
  84 +        * not don't try to post another, skip this period
  85 +        * and wait for the next.  Missed beacons indicate
  86 +        * a problem and should not occur.  If we miss too
  87 +        * many consecutive beacons reset the device.
  88 +        */
  89 +       if (ath9k_hw_numtxpending(ah, sc->beacon.beaconq) != 0) {
  90 +               sc->beacon.bmisscnt++;
  91 +
  92 +               if (sc->beacon.bmisscnt < BSTUCK_THRESH * sc->nbcnvifs) {
  93 +                       ath_dbg(common, BSTUCK,
  94 +                               "missed %u consecutive beacons\n",
  95 +                               sc->beacon.bmisscnt);
  96 +                       ath9k_hw_stop_dma_queue(ah, sc->beacon.beaconq);
  97 +                       if (sc->beacon.bmisscnt > 3)
  98 +                               ath9k_hw_bstuck_nfcal(ah);
  99 +               } else if (sc->beacon.bmisscnt >= BSTUCK_THRESH) {
 100 +                       ath_dbg(common, BSTUCK, "beacon is officially stuck\n");
 101 +                       sc->sc_flags |= SC_OP_TSF_RESET;
 102 +                       ieee80211_queue_work(sc->hw, &sc->hw_reset_work);
 103 +               }
 104 +
 105 +               return;
 106 +       }
 107 +
 108 +       bf = ath_beacon_generate(sc->hw, vif);
 109 +       if (!bf)
 110 +               return;
 111
 112 -               sc->beacon.ast_be_xmit += bc;     /* XXX per-vif? */
 113 +       if (sc->beacon.bmisscnt != 0) {
 114 +               ath_dbg(common, BSTUCK,
 115 +                       "resume beacon xmit after %u misses\n",
 116 +                       sc->beacon.bmisscnt);
 117 +               sc->beacon.bmisscnt = 0;
 118         }
 119 +
 120 +       /* NB: cabq traffic should already be queued and primed */
 121 +       ath9k_hw_puttxbuf(ah, sc->beacon.beaconq, bf->bf_daddr);
 122 +
 123 +       if (!edma)
 124 +               ath9k_hw_txstart(ah, sc->beacon.beaconq);
 125 +
 126 +       sc->beacon.ast_be_xmit++;
 127  }
 128
 129  static void ath9k_beacon_init(struct ath_softc *sc,