huge madwifi update - use a madwifi-ng-refcount snapshot as base, includes lots of bugfixes and performance enhancements

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@7211 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 196 insertions, 0 deletions

diff --git a/package/madwifi/patches/116-adhoc_beacon_PR_1033.patch b/package/madwifi/patches/116-adhoc_beacon_PR_1033.patch
new file mode 100644
index 0000000000..92a147c1b3
--- /dev/null
+++ b/package/madwifi/patches/116-adhoc_beacon_PR_1033.patch
@@ -0,0 +1,196 @@
+diff -urN madwifi-ng-refcount-r2313-20070505.old/ath/if_ath.c madwifi-ng-refcount-r2313-20070505.dev/ath/if_ath.c
+--- madwifi-ng-refcount-r2313-20070505.old/ath/if_ath.c	2007-05-13 18:17:55.862076712 +0200
++++ madwifi-ng-refcount-r2313-20070505.dev/ath/if_ath.c	2007-05-13 18:17:56.119037648 +0200
+@@ -4411,16 +4411,31 @@
+ 	struct ieee80211com *ic = &sc->sc_ic;
+ 	struct ath_hal *ah = sc->sc_ah;
+ 	struct ieee80211_node *ni;
+-	u_int32_t nexttbtt, intval;
++	u_int32_t nexttbtt = 0;
++	u_int32_t intval;
++	u_int64_t tsf, hw_tsf;
++	u_int32_t tsftu, hw_tsftu;
++	int should_reset_tsf = 0;
+ 
+ 	if (vap == NULL)
+ 		vap = TAILQ_FIRST(&ic->ic_vaps);   /* XXX */
+ 
+ 	ni = vap->iv_bss;
+ 
+-	/* extract tstamp from last beacon and convert to TU */
+-	nexttbtt = TSF_TO_TU(LE_READ_4(ni->ni_tstamp.data + 4),
+-			     LE_READ_4(ni->ni_tstamp.data));
++	hw_tsf = ath_hal_gettsf64(ah);
++	tsf = le64_to_cpu(ni->ni_tstamp.tsf);
++	hw_tsftu = hw_tsf >> 10;
++	tsftu = tsf >> 10;
++
++	/* we should reset hw TSF only once, so we increment
++	   ni_tstamp.tsf to avoid resetting the hw TSF multiple
++	   times */
++
++	if (tsf == 0) {
++		should_reset_tsf = 1;
++		ni->ni_tstamp.tsf = cpu_to_le64(1);
++	}
++
+ 	/* XXX conditionalize multi-bss support? */
+ 	if (ic->ic_opmode == IEEE80211_M_HOSTAP) {
+ 		/*
+@@ -4434,20 +4449,61 @@
+ 		if (sc->sc_stagbeacons)
+ 			intval /= ATH_BCBUF;	/* for staggered beacons */
+ 		if ((sc->sc_nostabeacons) &&
+-		    (vap->iv_opmode == IEEE80211_M_HOSTAP))
+-			nexttbtt = 0;
++			(vap->iv_opmode == IEEE80211_M_HOSTAP))
++			should_reset_tsf = 1;
+ 	} else
+ 		intval = ni->ni_intval & HAL_BEACON_PERIOD;
+-	if (nexttbtt == 0)		/* e.g. for ap mode */
++
++#define	FUDGE	2
++	sc->sc_syncbeacon = 0;
++	if (should_reset_tsf) {
++
++		/* We just created the interface and TSF will be reset to
++		   zero, so next beacon will be sent at the next intval
++		   time */
++
+ 		nexttbtt = intval;
+-	else if (intval)		/* NB: can be 0 for monitor mode */
+-		nexttbtt = roundup(nexttbtt, intval);
+-	DPRINTF(sc, ATH_DEBUG_BEACON, "%s: nexttbtt %u intval %u (%u)\n",
+-		__func__, nexttbtt, intval, ni->ni_intval);
++	} else if (intval) {	/* NB: can be 0 for monitor mode */
++		if (tsf == 1) {
++ 	
++			/* We do not receive any beacons or probe response. Since
++			   a beacon should be sent every 'intval' ms, we compute
++			   the next beacon timestamp using the hardware TSF. We
++			   ensure that it is at least FUDGE ms ahead of the
++			   current TSF. Otherwise, we use the next beacon
++			   timestamp again */
++
++			nexttbtt = roundup(hw_tsftu +1, intval);
++			while (nexttbtt <= hw_tsftu + FUDGE) {
++				nexttbtt += intval;
++			}
++		} else {
++			if (tsf > hw_tsf) {
++
++			/* We do receive a beacon from someone else in the past,
++			   but the hw TSF has not been updated (otherwise we
++			   would have tsf >= hw_tsf). Since we cannot use the
++			   hardware TSF, we will do nothing and wait for the
++			   next beacon. In order to do so, we set sc->syncbeacon
++			   again */
++
++				sc->sc_syncbeacon = 1;
++				goto ath_beacon_config_debug;
++			} else {
++				/* We do receive a beacon in the past, normal case. We
++				   make sure that the timestamp is at least FUDGE ms
++				   ahead of the hardware TSF */
++
++				nexttbtt = tsftu + intval;
++				while (nexttbtt <= hw_tsftu + FUDGE) {
++					nexttbtt += intval;
++				}
++			}
++		}
++	}
++
+ 	if (ic->ic_opmode == IEEE80211_M_STA &&	!(sc->sc_nostabeacons)) {
+ 		HAL_BEACON_STATE bs;
+-		u_int64_t tsf;
+-		u_int32_t tsftu;
+ 		int dtimperiod, dtimcount;
+ 		int cfpperiod, cfpcount;
+ 
+@@ -4463,13 +4519,13 @@
+ 			dtimcount = 0;		/* XXX? */
+ 		cfpperiod = 1;			/* NB: no PCF support yet */
+ 		cfpcount = 0;
+-#define	FUDGE	2
+ 		/*
+ 		 * Pull nexttbtt forward to reflect the current
+ 		 * TSF and calculate dtim+cfp state for the result.
+ 		 */
+-		tsf = ath_hal_gettsf64(ah);
+-		tsftu = TSF_TO_TU(tsf>>32, tsf) + FUDGE;
++		nexttbtt = tsftu;
++		if (nexttbtt == 0)		/* e.g. for ap mode */
++			nexttbtt = intval;
+ 		do {
+ 			nexttbtt += intval;
+ 			if (--dtimcount < 0) {
+@@ -4477,7 +4533,7 @@
+ 				if (--cfpcount < 0)
+ 					cfpcount = cfpperiod - 1;
+ 			}
+-		} while (nexttbtt < tsftu);
++		} while (nexttbtt < hw_tsftu + FUDGE);
+ #undef FUDGE
+ 		memset(&bs, 0, sizeof(bs));
+ 		bs.bs_intval = intval;
+@@ -4529,7 +4585,7 @@
+ 		DPRINTF(sc, ATH_DEBUG_BEACON, 
+ 			"%s: tsf %llu tsf:tu %u intval %u nexttbtt %u dtim %u nextdtim %u bmiss %u sleep %u cfp:period %u maxdur %u next %u timoffset %u\n",
+ 			__func__,
+-			(long long) tsf, tsftu,
++			(long long) hw_tsf, hw_tsftu,
+ 			bs.bs_intval,
+ 			bs.bs_nexttbtt,
+ 			bs.bs_dtimperiod,
+@@ -4548,7 +4604,7 @@
+ 		ath_hal_intrset(ah, sc->sc_imask);
+ 	} else {
+ 		ath_hal_intrset(ah, 0);
+-		if (nexttbtt == intval)
++		if (should_reset_tsf)
+ 			intval |= HAL_BEACON_RESET_TSF;
+ 		if (ic->ic_opmode == IEEE80211_M_IBSS) {
+ 			/*
+@@ -4585,8 +4641,40 @@
+ 		if (ic->ic_opmode == IEEE80211_M_IBSS && sc->sc_hasveol)
+ 			ath_beacon_start_adhoc(sc, vap);
+ 	}
+-	sc->sc_syncbeacon = 0;
+ #undef TSF_TO_TU
++
++	ath_beacon_config_debug:
++
++	/* we print all debug messages here, in order to preserve the
++	   time critical aspect of this function */
++
++	DPRINTF(sc, ATH_DEBUG_BEACON,
++		"%s: ni=%p tsf=%llu hw_tsf=%llu tsftu=%u hw_tsftu=%u\n",
++		__func__, ni, tsf, hw_tsf, tsftu, hw_tsftu);
++
++	if (should_reset_tsf) {
++		/* we just created the interface */
++		DPRINTF(sc, ATH_DEBUG_BEACON, "%s: first beacon\n",__func__);
++	} else {
++		if (tsf == 1) {
++			/* we do not receive any beacons or probe response */
++			DPRINTF(sc, ATH_DEBUG_BEACON,
++				"%s: no beacon received...\n",__func__);
++		} else {
++			if (tsf > hw_tsf) {
++				/* we do receive a beacon and the hw TSF has not been updated */
++				DPRINTF(sc, ATH_DEBUG_BEACON,
++					"%s: beacon received, but TSF is incorrect\n",__func__);
++			} else {
++				/* we do receive a beacon in the past, normal case */
++				DPRINTF(sc, ATH_DEBUG_BEACON,
++					"%s: beacon received, TSF is correct\n",__func__);
++			}
++		}
++	}
++
++	DPRINTF(sc, ATH_DEBUG_BEACON, "%s: nexttbtt=%u intval=%u\n",
++		__func__,nexttbtt, intval & HAL_BEACON_PERIOD);
+ }
+ 
+ static int