mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-25 08:21:14 +00:00
106 lines
4.1 KiB
Diff
106 lines
4.1 KiB
Diff
--- a/ath/if_ath.c
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+++ b/ath/if_ath.c
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@@ -1452,6 +1452,23 @@ ath_vap_create(struct ieee80211com *ic,
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sc->sc_nstavaps++;
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else if (opmode == IEEE80211_M_MONITOR)
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sc->sc_nmonvaps++;
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+
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+
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+ /* Driving the HAL in IBSS sometimes adapts the TSF and other timing registers
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+ * from received beacons/probes. If that happens, expected TX interrupts may
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+ * not occur until next reset. Which triggers the "lost beacon" tasklet.
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+ * Resulting effectively in not sending packets for minutes. Because that only
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+ * happens in large mesh networks, this mode needs to be activated by a kernel
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+ * module parameter: hostap_for_ibss=1. Note that using this mode has side
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+ * effects. Such as not supressing beacons/probe answers randomly when
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+ * receiving other node beacons. It's recommended to lower the beacon interval
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+ * then. When using an IBSS-VAP together with an HOSTAP-VAP, you may also need
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+ * to re-trigger IBSS beacon generation after creating the HOSTAP-VAP by
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+ * issueing "iwpriv athX bintval 1000".
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+ */
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+ if ((flags & IEEE80211_NO_STABEACONS) && (ic->ic_opmode == IEEE80211_M_IBSS))
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+ sc->sc_opmode = HAL_M_HOSTAP;
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+ else
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/*
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* Adhoc demo mode is a pseudo mode; to the HAL it's
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* just IBSS mode and the driver doesn't use management
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@@ -4279,7 +4296,8 @@ ath_calcrxfilter(struct ath_softc *sc)
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if (ic->ic_opmode != IEEE80211_M_HOSTAP && (dev->flags & IFF_PROMISC))
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rfilt |= HAL_RX_FILTER_PROM;
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if (ic->ic_opmode == IEEE80211_M_STA ||
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- sc->sc_opmode == HAL_M_IBSS || /* NB: AHDEMO too */
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+ ic->ic_opmode == IEEE80211_M_IBSS ||
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+ ic->ic_opmode == IEEE80211_M_AHDEMO ||
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(sc->sc_nostabeacons) || sc->sc_scanning ||
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(ic->ic_opmode == IEEE80211_M_HOSTAP))
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rfilt |= HAL_RX_FILTER_BEACON;
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@@ -6433,6 +6451,33 @@ ath_capture(struct net_device *dev, cons
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}
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/*
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+ * Advances (forwards/adds) a microsecond value to current chip's TSF registers
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+ */
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+
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+/* from ath_info.c */
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+#define AR5K_TSF_L32_5210 0x806c /* TSF (lower 32 bits) */
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+#define AR5K_TSF_L32_5211 0x804c
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+#define AR5K_TSF_L32 (ar_device(ah->ah_sc->devid) == 5210 ? \
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+ AR5K_TSF_L32_5210 : AR5K_TSF_L32_5211)
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+
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+#define AR5K_TSF_U32_5210 0x8070
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+#define AR5K_TSF_U32_5211 0x8050
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+#define AR5K_TSF_U32 (ar_device(ah->ah_sc->devid) == 5210 ? \
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+ AR5K_TSF_U32_5210 : AR5K_TSF_U32_5211)
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+
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+static inline void ath_hal_settsf64(struct ath_hal *ah, u_int64_t tsf_adv)
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+{
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+ ATH_HAL_LOCK_IRQ(ah->ah_sc);
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+ ath_hal_set_function(__func__);
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+ tsf_adv += ah->ah_getTsf64(ah);
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+ OS_REG_WRITE(ah, AR5K_TSF_L32, 0ll);
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+ OS_REG_WRITE(ah, AR5K_TSF_U32, (tsf_adv >> 32) & 0xffffffffll);
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+ OS_REG_WRITE(ah, AR5K_TSF_L32, (tsf_adv >> 00) & 0xffffffffll);
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+ ath_hal_set_function(NULL);
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+ ATH_HAL_UNLOCK_IRQ(ah->ah_sc);
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+}
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+
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+/*
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* Intercept management frames to collect beacon RSSI data and to do
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* ibss merges. This function is called for all management frames,
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* including those belonging to other BSS.
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@@ -6485,10 +6530,19 @@ ath_recv_mgmt(struct ieee80211vap * vap,
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DPRINTF(sc, ATH_DEBUG_BEACON,
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"Updated beacon timers\n");
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}
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- if ((sc->sc_opmode == HAL_M_IBSS) &&
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- IEEE80211_ADDR_EQ(ni->ni_bssid, vap->iv_bss->ni_bssid) &&
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- ath_hw_check_atim(sc, 1, vap->iv_bss->ni_intval)) {
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- DPRINTF(sc, ATH_DEBUG_ANY, "Fixed ATIM window after beacon recv\n");
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+ if ((vap->iv_opmode == IEEE80211_M_IBSS) &&
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+ (sc->sc_opmode == HAL_M_HOSTAP) &&
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+ IEEE80211_ADDR_EQ(ni->ni_bssid, vap->iv_bss->ni_bssid)) {
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+ /* In this mode, we drive the HAL in HOSTAP mode. Hence
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+ * we do the IBSS merging in software. Also do not merge
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+ * if the difference it too small. Otherwise we are playing
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+ * tsf-pingpong with other vendors drivers */
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+ beacon_tsf = le64_to_cpu(ni->ni_tstamp.tsf);
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+ if (beacon_tsf > rtsf + 0xffff) {
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+ ath_hal_settsf64(sc->sc_ah, beacon_tsf - rtsf);
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+ ieee80211_ibss_merge(ni);
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+ }
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+ break;
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}
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/* NB: Fall Through */
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case IEEE80211_FC0_SUBTYPE_PROBE_RESP:
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@@ -6561,6 +6615,10 @@ ath_recv_mgmt(struct ieee80211vap * vap,
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#endif
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if (do_merge)
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ieee80211_ibss_merge(ni);
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+
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+ if ((sc->sc_opmode == HAL_M_IBSS) &&
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+ ath_hw_check_atim(sc, 1, vap->iv_bss->ni_intval))
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+ DPRINTF(sc, ATH_DEBUG_ANY, "Fixed ATIM window after beacon recv\n");
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}
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break;
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}
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