package/madwifi/patches/383-ibss_hostap.patch

   1 --- a/ath/if_ath.c
   2 +++ b/ath/if_ath.c
   3 @@ -1452,6 +1452,23 @@ ath_vap_create(struct ieee80211com *ic,
   4                 sc->sc_nstavaps++;
   5         else if (opmode == IEEE80211_M_MONITOR)
   6                 sc->sc_nmonvaps++;
   7 +
   8 +
   9 +       /* Driving the HAL in IBSS sometimes adapts the TSF and other timing registers
  10 +        * from received beacons/probes. If that happens, expected TX interrupts may
  11 +        * not occur until next reset. Which triggers the "lost beacon" tasklet.
  12 +        * Resulting effectively in not sending packets for minutes. Because that only
  13 +        * happens in large mesh networks, this mode needs to be activated by a kernel
  14 +        * module parameter: hostap_for_ibss=1. Note that using this mode has side
  15 +        * effects. Such as not supressing beacons/probe answers randomly when
  16 +        * receiving other node beacons. It's recommended to lower the beacon interval
  17 +        * then. When using an IBSS-VAP together with an HOSTAP-VAP, you may also need
  18 +        * to re-trigger IBSS beacon generation after creating the HOSTAP-VAP by
  19 +        * issueing "iwpriv athX bintval 1000".
  20 +        */
  21 +       if ((flags & IEEE80211_NO_STABEACONS) && (ic->ic_opmode == IEEE80211_M_IBSS))
  22 +               sc->sc_opmode = HAL_M_HOSTAP;
  23 +       else
  24         /*
  25          * Adhoc demo mode is a pseudo mode; to the HAL it's
  26          * just IBSS mode and the driver doesn't use management
  27 @@ -4279,7 +4296,8 @@ ath_calcrxfilter(struct ath_softc *sc)
  28         if (ic->ic_opmode != IEEE80211_M_HOSTAP && (dev->flags & IFF_PROMISC))
  29                 rfilt |= HAL_RX_FILTER_PROM;
  30         if (ic->ic_opmode == IEEE80211_M_STA ||
  31 -           sc->sc_opmode == HAL_M_IBSS ||      /* NB: AHDEMO too */
  32 +           ic->ic_opmode == IEEE80211_M_IBSS ||
  33 +           ic->ic_opmode == IEEE80211_M_AHDEMO ||
  34             (sc->sc_nostabeacons) || sc->sc_scanning ||
  35                 (ic->ic_opmode == IEEE80211_M_HOSTAP))
  36                 rfilt |= HAL_RX_FILTER_BEACON;
  37 @@ -6435,6 +6453,33 @@ ath_capture(struct net_device *dev, cons
  38  }
  39
  40  /*
  41 + * Advances (forwards/adds) a microsecond value to current chip's TSF registers
  42 + */
  43 +
  44 +/* from ath_info.c */
  45 +#define AR5K_TSF_L32_5210              0x806c  /* TSF (lower 32 bits) */
  46 +#define AR5K_TSF_L32_5211              0x804c
  47 +#define AR5K_TSF_L32                   (ar_device(ah->ah_sc->devid) == 5210 ? \
  48 +                                       AR5K_TSF_L32_5210 : AR5K_TSF_L32_5211)
  49 +
  50 +#define AR5K_TSF_U32_5210              0x8070
  51 +#define AR5K_TSF_U32_5211              0x8050
  52 +#define AR5K_TSF_U32                   (ar_device(ah->ah_sc->devid) == 5210 ? \
  53 +                                       AR5K_TSF_U32_5210 : AR5K_TSF_U32_5211)
  54 +
  55 +static inline void ath_hal_settsf64(struct ath_hal *ah, u_int64_t tsf_adv)
  56 +{
  57 +       ATH_HAL_LOCK_IRQ(ah->ah_sc);
  58 +       ath_hal_set_function(__func__);
  59 +       tsf_adv += ah->ah_getTsf64(ah);
  60 +       OS_REG_WRITE(ah, AR5K_TSF_L32, 0ll);
  61 +       OS_REG_WRITE(ah, AR5K_TSF_U32, (tsf_adv >> 32) & 0xffffffffll);
  62 +       OS_REG_WRITE(ah, AR5K_TSF_L32, (tsf_adv >> 00) & 0xffffffffll);
  63 +       ath_hal_set_function(NULL);
  64 +       ATH_HAL_UNLOCK_IRQ(ah->ah_sc);
  65 +}
  66 +
  67 +/*
  68   * Intercept management frames to collect beacon RSSI data and to do
  69   * ibss merges. This function is called for all management frames,
  70   * including those belonging to other BSS.
  71 @@ -6487,10 +6532,19 @@ ath_recv_mgmt(struct ieee80211vap * vap,
  72                         DPRINTF(sc, ATH_DEBUG_BEACON,
  73                                 "Updated beacon timers\n");
  74                 }
  75 -               if ((sc->sc_opmode == HAL_M_IBSS) &&
  76 -                               IEEE80211_ADDR_EQ(ni->ni_bssid, vap->iv_bss->ni_bssid) &&
  77 -                               ath_hw_check_atim(sc, 1, vap->iv_bss->ni_intval)) {
  78 -                       DPRINTF(sc, ATH_DEBUG_ANY, "Fixed ATIM window after beacon recv\n");
  79 +               if ((vap->iv_opmode == IEEE80211_M_IBSS) &&
  80 +                               (sc->sc_opmode == HAL_M_HOSTAP) &&
  81 +                               IEEE80211_ADDR_EQ(ni->ni_bssid, vap->iv_bss->ni_bssid)) {
  82 +                       /* In this mode, we drive the HAL in HOSTAP mode. Hence
  83 +                        * we do the IBSS merging in software. Also do not merge
  84 +                        * if the difference it too small. Otherwise we are playing
  85 +                        * tsf-pingpong with other vendors drivers */
  86 +                       beacon_tsf = le64_to_cpu(ni->ni_tstamp.tsf);
  87 +                       if (beacon_tsf > rtsf + 0xffff) {
  88 +                               ath_hal_settsf64(sc->sc_ah, beacon_tsf - rtsf);
  89 +                               ieee80211_ibss_merge(ni);
  90 +                       }
  91 +                       break;
  92                 }
  93                 /* NB: Fall Through */
  94         case IEEE80211_FC0_SUBTYPE_PROBE_RESP:
  95 @@ -6563,6 +6617,10 @@ ath_recv_mgmt(struct ieee80211vap * vap,
  96  #endif
  97                         if (do_merge)
  98                                 ieee80211_ibss_merge(ni);
  99 +
 100 +                       if ((sc->sc_opmode == HAL_M_IBSS) &&
 101 +                                       ath_hw_check_atim(sc, 1, vap->iv_bss->ni_intval))
 102 +                               DPRINTF(sc, ATH_DEBUG_ANY, "Fixed ATIM window after beacon recv\n");
 103                 }
 104                 break;
 105         }