madwifi: remove stuck beacon workaround (does not work properly). add a workaround for MIB interrupt flooding

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@8310 3c298f89-4303-0410-b956-a3cf2f4a3e73

2 files changed, 83 insertions, 102 deletions

diff --git a/package/madwifi/patches/306-bstuck_calibrate.patch b/package/madwifi/patches/306-bstuck_calibrate.patch
deleted file mode 100644
index 1729132f87..0000000000
--- a/package/madwifi/patches/306-bstuck_calibrate.patch
+++ /dev/null
@@ -1,102 +0,0 @@
-Index: madwifi-ng-r2568-20070710/ath/if_ath.c
-===================================================================
---- madwifi-ng-r2568-20070710.orig/ath/if_ath.c	2007-07-23 01:48:45.690583928 +0200
-+++ madwifi-ng-r2568-20070710/ath/if_ath.c	2007-07-23 01:48:46.026603077 +0200
-@@ -153,6 +153,7 @@
- static void ath_turbo_switch_mode(unsigned long);
- static int ath_check_beacon_done(struct ath_softc *);
- #endif
-+static void ath_do_calibrate(struct net_device *);
- static void ath_beacon_send(struct ath_softc *, int *);
- static void ath_beacon_start_adhoc(struct ath_softc *, struct ieee80211vap *);
- static void ath_beacon_return(struct ath_softc *, struct ath_buf *);
-@@ -4175,7 +4176,7 @@
- 		DPRINTF(sc, ATH_DEBUG_BEACON_PROC,
- 			"%s: missed %u consecutive beacons\n",
- 			__func__, sc->sc_bmisscount);
--		if (sc->sc_bmisscount > BSTUCK_THRESH)
-+		if (sc->sc_bmisscount > BSTUCK_CALIBR_THR)
- 			ATH_SCHEDULE_TQUEUE(&sc->sc_bstucktq, needmark);
- 		return;
- 	}
-@@ -4314,8 +4315,17 @@
- 	 *     check will be true, in which case return 
- 	 *     without resetting the driver.
- 	 */
--	if (sc->sc_bmisscount <= BSTUCK_THRESH)
-+	if (sc->sc_bmisscount <= BSTUCK_CALIBR_THR)
- 		return;
-+
-+	if (sc->sc_bmisscount <= BSTUCK_RESET_THR) {
-+		ATH_LOCK(sc);
-+		ath_do_calibrate(dev);
-+		mod_timer(&sc->sc_cal_ch, jiffies + (ath_calinterval * HZ));
-+		ATH_UNLOCK(sc);
-+		return;
-+	}
-+
- 	printk("%s: stuck beacon; resetting (bmiss count %u)\n",
- 		DEV_NAME(dev), sc->sc_bmisscount);
- 	ath_reset(dev);
-@@ -8029,17 +8039,13 @@
-  * Periodically recalibrate the PHY to account
-  * for temperature/environment changes.
-  */
--static void
--ath_calibrate(unsigned long arg)
-+static void ath_do_calibrate(struct net_device *dev)
- {
--	struct net_device *dev = (struct net_device *) arg;
- 	struct ath_softc *sc = dev->priv;
- 	struct ath_hal *ah = sc->sc_ah;
--	/* u_int32_t nchans; */
- 	HAL_BOOL isIQdone = AH_FALSE;
- 
- 	sc->sc_stats.ast_per_cal++;
--
- 	DPRINTF(sc, ATH_DEBUG_CALIBRATE, "%s: channel %u/%x\n",
- 		__func__, sc->sc_curchan.channel, sc->sc_curchan.channelFlags);
- 
-@@ -8057,15 +8063,26 @@
- 			__func__, sc->sc_curchan.channel);
- 		sc->sc_stats.ast_per_calfail++;
- 	}
--
--	ath_hal_process_noisefloor(ah);
- 	if (isIQdone == AH_TRUE)
- 		ath_calinterval = ATH_LONG_CALINTERVAL;
- 	else
- 		ath_calinterval = ATH_SHORT_CALINTERVAL;
-+}
-+
-+static void
-+ath_calibrate(unsigned long arg)
-+{
-+	struct net_device *dev = (struct net_device *) arg;
-+	struct ath_softc *sc = dev->priv;
-+	struct ath_hal *ah = sc->sc_ah;
-+
-+	ATH_LOCK(sc);
-+	ath_do_calibrate(dev);
-+	ath_hal_process_noisefloor(ah);
- 
- 	sc->sc_cal_ch.expires = jiffies + (ath_calinterval * HZ);
- 	add_timer(&sc->sc_cal_ch);
-+	ATH_UNLOCK(sc);
- }
- 
- static void
-Index: madwifi-ng-r2568-20070710/ath/if_athvar.h
-===================================================================
---- madwifi-ng-r2568-20070710.orig/ath/if_athvar.h	2007-07-23 01:48:45.406567742 +0200
-+++ madwifi-ng-r2568-20070710/ath/if_athvar.h	2007-07-23 01:48:46.026603077 +0200
-@@ -538,7 +538,8 @@
-  */
- #define ATH_TXQ_MOVE_Q(_tqs,_tqd)  ATH_TXQ_MOVE_MCASTQ(_tqs,_tqd)
- 
--#define	BSTUCK_THRESH	10	/* # of stuck beacons before resetting NB: this is a guess*/
-+#define	BSTUCK_CALIBR_THR	3	/* # of stuck beacons before restarting calibration */
-+#define	BSTUCK_RESET_THR	10	/* # of stuck beacons before resetting NB: this is a guess*/
- 
- struct ath_softc {
- 	struct ieee80211com sc_ic;		/* NB: must be first */
diff --git a/package/madwifi/patches/306-mib_intr_workaround.patch b/package/madwifi/patches/306-mib_intr_workaround.patch
new file mode 100644
index 0000000000..c00c73a78b
--- /dev/null
+++ b/package/madwifi/patches/306-mib_intr_workaround.patch
@@ -0,0 +1,83 @@
+Index: madwifi-ng-r2568-20070710/ath/if_ath.c
+===================================================================
+--- madwifi-ng-r2568-20070710.orig/ath/if_ath.c	2007-08-01 11:07:47.882943145 +0200
++++ madwifi-ng-r2568-20070710/ath/if_ath.c	2007-08-01 11:41:11.781138794 +0200
+@@ -203,6 +203,7 @@
+ static void ath_flushrecv(struct ath_softc *);
+ static void ath_chan_change(struct ath_softc *, struct ieee80211_channel *);
+ static void ath_calibrate(unsigned long);
++static void ath_mib_enable(unsigned long);
+ static int ath_newstate(struct ieee80211vap *, enum ieee80211_state, int);
+ 
+ static void ath_scan_start(struct ieee80211com *);
+@@ -660,6 +661,10 @@
+ 	sc->sc_cal_ch.function = ath_calibrate;
+ 	sc->sc_cal_ch.data = (unsigned long) dev;
+ 
++	init_timer(&sc->sc_mib_enable);
++	sc->sc_mib_enable.function = ath_mib_enable;
++	sc->sc_mib_enable.data = (unsigned long) sc;
++
+ #ifdef ATH_SUPERG_DYNTURBO
+ 	init_timer(&sc->sc_dturbo_switch_mode);
+ 	sc->sc_dturbo_switch_mode.function = ath_turbo_switch_mode;
+@@ -1751,16 +1756,19 @@
+ 		if (status & HAL_INT_MIB) {
+ 			sc->sc_stats.ast_mib++;
+ 			/*
+-			 * Disable interrupts until we service the MIB
+-			 * interrupt; otherwise it will continue to fire.
+-			 */
+-			ath_hal_intrset(ah, 0);
+-			/*
+-			 * Let the HAL handle the event.  We assume it will
+-			 * clear whatever condition caused the interrupt.
++			 * When the card receives lots of PHY errors, the MIB
++			 * interrupt will fire at a very rapid rate. We will use
++			 * a timer to enforce at least 1 jiffy delay between
++			 * MIB interrupts. This should be unproblematic, since
++			 * the hardware will continue to update the counters in the
++			 * mean time.
+ 			 */
+-			ath_hal_mibevent(ah, &sc->sc_halstats);
++			sc->sc_imask &= ~HAL_INT_MIB;
+ 			ath_hal_intrset(ah, sc->sc_imask);
++			mod_timer(&sc->sc_mib_enable, jiffies + 1);
++
++			/* Let the HAL handle the event. */
++			ath_hal_mibevent(ah, &sc->sc_halstats);
+ 		}
+ 	}
+ 	if (needmark)
+@@ -8029,6 +8037,19 @@
+ }
+ 
+ /*
++ * Enable MIB interrupts again, after the ISR disabled them
++ * to slow down the rate of PHY error reporting.
++ */
++static void
++ath_mib_enable(unsigned long arg)
++{
++	struct ath_softc *sc = (struct ath_softc *) arg;
++
++	sc->sc_imask |= HAL_INT_MIB;
++	ath_hal_intrset(sc->sc_ah, sc->sc_imask);
++}
++
++/*
+  * Periodically recalibrate the PHY to account
+  * for temperature/environment changes.
+  */
+Index: madwifi-ng-r2568-20070710/ath/if_athvar.h
+===================================================================
+--- madwifi-ng-r2568-20070710.orig/ath/if_athvar.h	2007-08-01 11:33:50.800008711 +0200
++++ madwifi-ng-r2568-20070710/ath/if_athvar.h	2007-08-01 11:34:33.202425088 +0200
+@@ -687,6 +687,7 @@
+ 	struct ctl_table *sc_sysctls;
+ 
+ 	u_int16_t sc_reapcount;  		/* # of tx buffers reaped after net dev stopped */
++	struct timer_list sc_mib_enable;
+ 
+ #ifdef ATH_REVERSE_ENGINEERING
+ 	u_int8_t register_snapshot[MAX_REGISTER_ADDRESS];