mirror of https://github.com/hak5/openwrt.git
madwifi: remove stuck beacon workaround (does not work properly). add a workaround for MIB interrupt flooding
SVN-Revision: 8310lede-17.01
Felix Fietkau
parent
c2ed86a859
commit
81bea3c501
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@ -1,102 +0,0 @@
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Index: madwifi-ng-r2568-20070710/ath/if_ath.c
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===================================================================
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--- madwifi-ng-r2568-20070710.orig/ath/if_ath.c 2007-07-23 01:48:45.690583928 +0200
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+++ madwifi-ng-r2568-20070710/ath/if_ath.c 2007-07-23 01:48:46.026603077 +0200
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@@ -153,6 +153,7 @@
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static void ath_turbo_switch_mode(unsigned long);
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static int ath_check_beacon_done(struct ath_softc *);
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#endif
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+static void ath_do_calibrate(struct net_device *);
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static void ath_beacon_send(struct ath_softc *, int *);
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static void ath_beacon_start_adhoc(struct ath_softc *, struct ieee80211vap *);
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static void ath_beacon_return(struct ath_softc *, struct ath_buf *);
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@@ -4175,7 +4176,7 @@
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DPRINTF(sc, ATH_DEBUG_BEACON_PROC,
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"%s: missed %u consecutive beacons\n",
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__func__, sc->sc_bmisscount);
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- if (sc->sc_bmisscount > BSTUCK_THRESH)
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+ if (sc->sc_bmisscount > BSTUCK_CALIBR_THR)
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ATH_SCHEDULE_TQUEUE(&sc->sc_bstucktq, needmark);
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return;
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}
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@@ -4314,8 +4315,17 @@
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* check will be true, in which case return
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* without resetting the driver.
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*/
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- if (sc->sc_bmisscount <= BSTUCK_THRESH)
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+ if (sc->sc_bmisscount <= BSTUCK_CALIBR_THR)
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return;
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+
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+ if (sc->sc_bmisscount <= BSTUCK_RESET_THR) {
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+ ATH_LOCK(sc);
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+ ath_do_calibrate(dev);
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+ mod_timer(&sc->sc_cal_ch, jiffies + (ath_calinterval * HZ));
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+ ATH_UNLOCK(sc);
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+ return;
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+ }
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+
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printk("%s: stuck beacon; resetting (bmiss count %u)\n",
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DEV_NAME(dev), sc->sc_bmisscount);
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ath_reset(dev);
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@@ -8029,17 +8039,13 @@
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* Periodically recalibrate the PHY to account
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* for temperature/environment changes.
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*/
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-static void
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-ath_calibrate(unsigned long arg)
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+static void ath_do_calibrate(struct net_device *dev)
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{
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- struct net_device *dev = (struct net_device *) arg;
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struct ath_softc *sc = dev->priv;
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struct ath_hal *ah = sc->sc_ah;
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- /* u_int32_t nchans; */
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HAL_BOOL isIQdone = AH_FALSE;
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sc->sc_stats.ast_per_cal++;
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-
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DPRINTF(sc, ATH_DEBUG_CALIBRATE, "%s: channel %u/%x\n",
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__func__, sc->sc_curchan.channel, sc->sc_curchan.channelFlags);
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@@ -8057,15 +8063,26 @@
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__func__, sc->sc_curchan.channel);
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sc->sc_stats.ast_per_calfail++;
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}
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-
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- ath_hal_process_noisefloor(ah);
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if (isIQdone == AH_TRUE)
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ath_calinterval = ATH_LONG_CALINTERVAL;
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else
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ath_calinterval = ATH_SHORT_CALINTERVAL;
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+}
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+
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+static void
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+ath_calibrate(unsigned long arg)
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+{
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+ struct net_device *dev = (struct net_device *) arg;
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+ struct ath_softc *sc = dev->priv;
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+ struct ath_hal *ah = sc->sc_ah;
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+
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+ ATH_LOCK(sc);
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+ ath_do_calibrate(dev);
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+ ath_hal_process_noisefloor(ah);
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sc->sc_cal_ch.expires = jiffies + (ath_calinterval * HZ);
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add_timer(&sc->sc_cal_ch);
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+ ATH_UNLOCK(sc);
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}
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static void
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Index: madwifi-ng-r2568-20070710/ath/if_athvar.h
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===================================================================
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--- madwifi-ng-r2568-20070710.orig/ath/if_athvar.h 2007-07-23 01:48:45.406567742 +0200
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+++ madwifi-ng-r2568-20070710/ath/if_athvar.h 2007-07-23 01:48:46.026603077 +0200
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@@ -538,7 +538,8 @@
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*/
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#define ATH_TXQ_MOVE_Q(_tqs,_tqd) ATH_TXQ_MOVE_MCASTQ(_tqs,_tqd)
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-#define BSTUCK_THRESH 10 /* # of stuck beacons before resetting NB: this is a guess*/
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+#define BSTUCK_CALIBR_THR 3 /* # of stuck beacons before restarting calibration */
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+#define BSTUCK_RESET_THR 10 /* # of stuck beacons before resetting NB: this is a guess*/
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struct ath_softc {
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struct ieee80211com sc_ic; /* NB: must be first */
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@ -0,0 +1,83 @@
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Index: madwifi-ng-r2568-20070710/ath/if_ath.c
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===================================================================
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--- madwifi-ng-r2568-20070710.orig/ath/if_ath.c 2007-08-01 11:07:47.882943145 +0200
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+++ madwifi-ng-r2568-20070710/ath/if_ath.c 2007-08-01 11:41:11.781138794 +0200
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@@ -203,6 +203,7 @@
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static void ath_flushrecv(struct ath_softc *);
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static void ath_chan_change(struct ath_softc *, struct ieee80211_channel *);
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static void ath_calibrate(unsigned long);
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+static void ath_mib_enable(unsigned long);
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static int ath_newstate(struct ieee80211vap *, enum ieee80211_state, int);
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static void ath_scan_start(struct ieee80211com *);
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@@ -660,6 +661,10 @@
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sc->sc_cal_ch.function = ath_calibrate;
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sc->sc_cal_ch.data = (unsigned long) dev;
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+ init_timer(&sc->sc_mib_enable);
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+ sc->sc_mib_enable.function = ath_mib_enable;
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+ sc->sc_mib_enable.data = (unsigned long) sc;
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+
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#ifdef ATH_SUPERG_DYNTURBO
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init_timer(&sc->sc_dturbo_switch_mode);
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sc->sc_dturbo_switch_mode.function = ath_turbo_switch_mode;
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@@ -1751,16 +1756,19 @@
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if (status & HAL_INT_MIB) {
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sc->sc_stats.ast_mib++;
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/*
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- * Disable interrupts until we service the MIB
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- * interrupt; otherwise it will continue to fire.
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- */
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- ath_hal_intrset(ah, 0);
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- /*
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- * Let the HAL handle the event. We assume it will
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- * clear whatever condition caused the interrupt.
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+ * When the card receives lots of PHY errors, the MIB
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+ * interrupt will fire at a very rapid rate. We will use
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+ * a timer to enforce at least 1 jiffy delay between
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+ * MIB interrupts. This should be unproblematic, since
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+ * the hardware will continue to update the counters in the
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+ * mean time.
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*/
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- ath_hal_mibevent(ah, &sc->sc_halstats);
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+ sc->sc_imask &= ~HAL_INT_MIB;
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ath_hal_intrset(ah, sc->sc_imask);
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+ mod_timer(&sc->sc_mib_enable, jiffies + 1);
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+
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+ /* Let the HAL handle the event. */
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+ ath_hal_mibevent(ah, &sc->sc_halstats);
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}
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}
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if (needmark)
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@@ -8029,6 +8037,19 @@
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}
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/*
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+ * Enable MIB interrupts again, after the ISR disabled them
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+ * to slow down the rate of PHY error reporting.
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+ */
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+static void
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+ath_mib_enable(unsigned long arg)
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+{
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+ struct ath_softc *sc = (struct ath_softc *) arg;
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+
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+ sc->sc_imask |= HAL_INT_MIB;
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+ ath_hal_intrset(sc->sc_ah, sc->sc_imask);
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+}
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+
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+/*
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* Periodically recalibrate the PHY to account
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* for temperature/environment changes.
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*/
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Index: madwifi-ng-r2568-20070710/ath/if_athvar.h
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===================================================================
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--- madwifi-ng-r2568-20070710.orig/ath/if_athvar.h 2007-08-01 11:33:50.800008711 +0200
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+++ madwifi-ng-r2568-20070710/ath/if_athvar.h 2007-08-01 11:34:33.202425088 +0200
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@@ -687,6 +687,7 @@
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struct ctl_table *sc_sysctls;
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u_int16_t sc_reapcount; /* # of tx buffers reaped after net dev stopped */
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+ struct timer_list sc_mib_enable;
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#ifdef ATH_REVERSE_ENGINEERING
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u_int8_t register_snapshot[MAX_REGISTER_ADDRESS];
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