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openwrt/package/madwifi/patches/448-beacon_handling_fixes.patch
Felix Fietkau 025ac2b369 madwifi: beacon timer fixes 
SVN-Revision: 18045
2009-10-14 08:29:37 +00:00

408 lines
15 KiB
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--- a/ath/if_ath.c
+++ b/ath/if_ath.c
@@ -160,7 +160,7 @@ static int ath_check_beacon_done(struct
static void ath_beacon_send(struct ath_softc *, int *, uint64_t hw_tsf);
static void ath_beacon_return(struct ath_softc *, struct ath_buf *);
static void ath_beacon_free(struct ath_softc *);
-static void ath_beacon_config(struct ath_softc *, struct ieee80211vap *);
+static void ath_beacon_config(struct ath_softc *, struct ieee80211vap *, int);
static void ath_hw_beacon_stop(struct ath_softc *sc);
static int ath_desc_alloc(struct ath_softc *);
static void ath_desc_free(struct ath_softc *);
@@ -387,13 +387,11 @@ static void ath_set_timing(struct ath_so
/* calibrate every 30 secs in steady state but check every second at first. */
static int ath_calinterval = ATH_SHORT_CALINTERVAL;
static int ath_xchanmode = AH_TRUE; /* enable extended channels */
-static int ath_maxvaps = ATH_MAXVAPS_DEFAULT; /* set default maximum vaps */
static int bstuck_thresh = BSTUCK_THRESH; /* Stuck beacon count required for reset */
static char *autocreate = NULL;
static char *ratectl = DEF_RATE_CTL;
static int rfkill = 0;
static int tpc = 1;
-static int maxvaps = -1;
static int xchanmode = -1;
#include "ath_wprobe.c"
static int beacon_cal = 1;
@@ -432,7 +430,6 @@ static struct notifier_block ath_event_b
#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,52))
MODULE_PARM(beacon_cal, "i");
-MODULE_PARM(maxvaps, "i");
MODULE_PARM(xchanmode, "i");
MODULE_PARM(rfkill, "i");
#ifdef ATH_CAP_TPC
@@ -444,7 +441,6 @@ MODULE_PARM(ratectl, "s");
#else
#include <linux/moduleparam.h>
module_param(beacon_cal, int, 0600);
-module_param(maxvaps, int, 0600);
module_param(xchanmode, int, 0600);
module_param(rfkill, int, 0600);
#ifdef ATH_CAP_TPC
@@ -454,7 +450,6 @@ module_param(bstuck_thresh, int, 0600);
module_param(autocreate, charp, 0600);
module_param(ratectl, charp, 0600);
#endif
-MODULE_PARM_DESC(maxvaps, "Maximum VAPs");
MODULE_PARM_DESC(xchanmode, "Enable/disable extended channel mode");
MODULE_PARM_DESC(rfkill, "Enable/disable RFKILL capability");
#ifdef ATH_CAP_TPC
@@ -512,7 +507,7 @@ MODULE_PARM_DESC(ieee80211_debug, "Load-
* and use the higher bits as the index of the VAP.
*/
#define ATH_SET_VAP_BSSID_MASK(bssid_mask) \
- ((bssid_mask)[0] &= ~(((ath_maxvaps-1) << 2) | 0x02))
+ ((bssid_mask)[0] &= ~(((ATH_MAXVAPS_BCN-1) << 2) | 0x02))
#define ATH_GET_VAP_ID(bssid) ((bssid)[0] >> 2)
#define ATH_SET_VAP_BSSID(bssid, id) \
do { \
@@ -604,8 +599,8 @@ ath_attach(u_int16_t devid, struct net_d
/* Allocate space for dynamically determined maximum VAP count */
sc->sc_bslot =
- kmalloc(ath_maxvaps * sizeof(struct ieee80211vap*), GFP_KERNEL);
- memset(sc->sc_bslot, 0, ath_maxvaps * sizeof(struct ieee80211vap*));
+ kmalloc(ATH_MAXVAPS_BCN * sizeof(struct ieee80211vap*), GFP_KERNEL);
+ memset(sc->sc_bslot, 0, ATH_MAXVAPS_BCN * sizeof(struct ieee80211vap*));
/*
* Cache line size is used to size and align various
@@ -694,13 +689,6 @@ ath_attach(u_int16_t devid, struct net_d
for (i = 0; i < sc->sc_keymax; i++)
ath_hal_keyreset(ah, i);
- if (maxvaps != -1) {
- ath_maxvaps = maxvaps;
- if (ath_maxvaps < ATH_MAXVAPS_MIN)
- ath_maxvaps = ATH_MAXVAPS_MIN;
- else if (ath_maxvaps > ATH_MAXVAPS_MAX)
- ath_maxvaps = ATH_MAXVAPS_MAX;
- }
if (xchanmode != -1)
ath_xchanmode = xchanmode;
error = ath_getchannels(dev);
@@ -1349,12 +1337,6 @@ ath_vap_create(struct ieee80211com *ic,
return NULL;
}
- if (sc->sc_nvaps >= ath_maxvaps) {
- EPRINTF(sc, "Too many virtual APs (%d already exist).\n",
- sc->sc_nvaps);
- return NULL;
- }
-
dev = alloc_etherdev(sizeof(struct ath_vap) + sc->sc_rc->arc_vap_space);
if (dev == NULL) {
/* XXX msg */
@@ -1424,7 +1406,7 @@ ath_vap_create(struct ieee80211com *ic,
TAILQ_FOREACH(v, &ic->ic_vaps, iv_next)
id_mask |= (1 << ATH_GET_VAP_ID(v->iv_myaddr));
- for (id = 0; id < ath_maxvaps; id++) {
+ for (id = 0; id < ATH_MAXVAPS_BCN; id++) {
/* get the first available slot */
if ((id_mask & (1 << id)) == 0) {
ATH_SET_VAP_BSSID(vap->iv_myaddr, id);
@@ -1451,11 +1433,11 @@ ath_vap_create(struct ieee80211com *ic,
/* Assign the VAP to a beacon xmit slot. As
* above, this cannot fail to find one. */
avp->av_bslot = 0;
- for (slot = 0; slot < ath_maxvaps; slot++)
+ for (slot = 0; slot < ATH_MAXVAPS_BCN; slot++)
if (sc->sc_bslot[slot] == NULL) {
/* XXX: Hack, space out slots to better
* deal with misses. */
- if (slot + 1 < ath_maxvaps &&
+ if (slot + 1 < ATH_MAXVAPS_BCN &&
sc->sc_bslot[slot+1] == NULL) {
avp->av_bslot = slot + 1;
break;
@@ -1463,8 +1445,11 @@ ath_vap_create(struct ieee80211com *ic,
avp->av_bslot = slot;
/* NB: keep looking for a double slot */
}
- KASSERT(sc->sc_bslot[avp->av_bslot] == NULL,
- ("beacon slot %u not empty?", avp->av_bslot));
+ if (sc->sc_bslot[avp->av_bslot]) {
+ free_netdev(dev);
+ return NULL;
+ }
+
sc->sc_bslot[avp->av_bslot] = vap;
sc->sc_nbcnvaps++;
@@ -1475,15 +1460,7 @@ ath_vap_create(struct ieee80211com *ic,
* of staggered beacons.
*/
/* XXX check for beacon interval too small */
- if (ath_maxvaps > 4) {
- DPRINTF(sc, ATH_DEBUG_BEACON,
- "Staggered beacons are not "
- "possible with maxvaps set "
- "to %d.\n", ath_maxvaps);
- sc->sc_stagbeacons = 0;
- } else {
- sc->sc_stagbeacons = 1;
- }
+ sc->sc_stagbeacons = 1;
}
DPRINTF(sc, ATH_DEBUG_BEACON, "sc->sc_stagbeacons %sabled\n",
(sc->sc_stagbeacons ? "en" : "dis"));
@@ -1553,7 +1530,7 @@ ath_vap_create(struct ieee80211com *ic,
if (ath_startrecv(sc) != 0) /* restart recv */
EPRINTF(sc, "Unable to start receive logic.\n");
if (sc->sc_beacons)
- ath_beacon_config(sc, NULL); /* restart beacons */
+ ath_beacon_config(sc, NULL, 0); /* restart beacons */
ath_hal_intrset(ah, sc->sc_imask);
}
@@ -1681,7 +1658,7 @@ ath_vap_delete(struct ieee80211vap *vap)
if (ath_startrecv(sc) != 0) /* restart recv. */
EPRINTF(sc, "Unable to start receive logic.\n");
if (sc->sc_beacons)
- ath_beacon_config(sc, NULL); /* restart beacons */
+ ath_beacon_config(sc, NULL, 0); /* restart beacons */
ath_hal_intrset(ah, sc->sc_imask);
}
}
@@ -3066,7 +3043,7 @@ ath_reset(struct net_device *dev)
*/
ath_chan_change(sc, c);
if (sc->sc_beacons)
- ath_beacon_config(sc, NULL); /* restart beacons */
+ ath_beacon_config(sc, NULL, 1); /* restart beacons */
ath_hal_intrset(ah, sc->sc_imask);
ath_set_ack_bitrate(sc, sc->sc_ackrate);
netif_wake_queue(dev); /* restart xmit */
@@ -4763,7 +4740,7 @@ ath_check_beacon_done(struct ath_softc *
/*
* check if the last beacon went out with the mode change flag set.
*/
- for (slot = 0; slot < ath_maxvaps; slot++) {
+ for (slot = 0; slot < ATH_MAXVAPS_BCN; slot++) {
if (sc->sc_bslot[slot]) {
vap = sc->sc_bslot[slot];
break;
@@ -4968,7 +4945,7 @@ ath_beacon_alloc_internal(struct ath_sof
* has a timestamp in one beacon interval while the
* others get a timestamp aligned to the next interval.
*/
- tuadjust = (ni->ni_intval * (ath_maxvaps - avp->av_bslot)) / ath_maxvaps;
+ tuadjust = (ni->ni_intval * (ATH_MAXVAPS_BCN - avp->av_bslot)) / ATH_MAXVAPS_BCN;
tsfadjust = cpu_to_le64(tuadjust << 10); /* TU->TSF */
DPRINTF(sc, ATH_DEBUG_BEACON,
@@ -5361,8 +5338,8 @@ ath_beacon_send(struct ath_softc *sc, in
u_int32_t tsftu;
tsftu = hw_tsf >> 10; /* NB: 64 -> 32: See note far above. */
- slot = ((tsftu % ic->ic_lintval) * ath_maxvaps) / ic->ic_lintval;
- vap = sc->sc_bslot[(slot + 1) % ath_maxvaps];
+ slot = ((tsftu % ic->ic_lintval) * ATH_MAXVAPS_BCN) / ic->ic_lintval;
+ vap = sc->sc_bslot[(slot + 1) % ATH_MAXVAPS_BCN];
DPRINTF(sc, ATH_DEBUG_BEACON_PROC,
"Slot %d [tsf %llu tsftu %llu intval %u] vap %p\n",
slot, (unsigned long long)hw_tsf,
@@ -5377,7 +5354,7 @@ ath_beacon_send(struct ath_softc *sc, in
u_int32_t *bflink = NULL;
/* XXX: rotate/randomize order? */
- for (slot = 0; slot < ath_maxvaps; slot++) {
+ for (slot = 0; slot < ATH_MAXVAPS_BCN; slot++) {
if ((vap = sc->sc_bslot[slot]) != NULL) {
if ((bf = ath_beacon_generate(
sc, vap,
@@ -5418,7 +5395,7 @@ ath_beacon_send(struct ath_softc *sc, in
* again. If we miss a beacon for that slot then we'll be
* slow to transition but we'll be sure at least one beacon
* interval has passed. When bursting slot is always left
- * set to ath_maxvaps so this check is a no-op.
+ * set to ATH_MAXVAPS_BCN so this check is a no-op.
*/
/* XXX locking */
if (sc->sc_updateslot == UPDATE) {
@@ -5526,7 +5503,7 @@ ath_beacon_free(struct ath_softc *sc)
* (2^(32 + 10 - 1) - 1)us is a really long time.
*/
static void
-ath_beacon_config(struct ath_softc *sc, struct ieee80211vap *vap)
+ath_beacon_config(struct ath_softc *sc, struct ieee80211vap *vap, int reset)
{
struct ieee80211com *ic = &sc->sc_ic;
struct ath_hal *ah = sc->sc_ah;
@@ -5553,7 +5530,7 @@ ath_beacon_config(struct ath_softc *sc,
/* We should reset hw TSF only once, so we increment
* ni_tstamp.tsf to avoid resetting the hw TSF multiple
* times */
- if (tsf == 0) {
+ if (tsf == 0 || reset) {
reset_tsf = 1;
ni->ni_tstamp.tsf = cpu_to_le64(1);
}
@@ -5567,7 +5544,7 @@ ath_beacon_config(struct ath_softc *sc,
/* NB: the beacon interval is kept internally in TUs */
intval = ic->ic_lintval & HAL_BEACON_PERIOD;
if (sc->sc_stagbeacons)
- intval /= ath_maxvaps; /* for staggered beacons */
+ intval /= ATH_MAXVAPS_BCN; /* for staggered beacons */
if ((sc->sc_nostabeacons) &&
(vap->iv_opmode == IEEE80211_M_HOSTAP))
reset_tsf = 1;
@@ -5583,31 +5560,24 @@ ath_beacon_config(struct ath_softc *sc,
* time */
nexttbtt = intval;
} else if (intval) { /* NB: can be 0 for monitor mode */
- if (tsf == 1) {
- /* We have not received any beacons or probe
- * responses. 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 TUs ahead
- * of the current TSF. Otherwise, we use the
- * next beacon timestamp again */
- nexttbtt = roundup(hw_tsftu + FUDGE, intval);
- }
- else if (ic->ic_opmode == IEEE80211_M_IBSS) {
- if (tsf > hw_tsf) {
- /* We received a beacon, but the HW TSF has
- * not been updated (otherwise hw_tsf > tsf)
- * We cannot use the hardware TSF, so we
- * wait to synchronize beacons again. */
- sc->sc_syncbeacon = 1;
- goto ath_beacon_config_debug;
- } else {
- /* Normal case: we received a beacon to which
- * we have synchronized. Make sure that nexttbtt
- * is at least FUDGE TU ahead of hw_tsf */
- nexttbtt = tsftu + roundup(hw_tsftu + FUDGE -
- tsftu, intval);
- }
+ if ((tsf > hw_tsf) && (ic->ic_opmode == IEEE80211_M_IBSS)) {
+ /* We received a beacon, but the HW TSF has
+ * not been updated (otherwise hw_tsf > tsf)
+ * We cannot use the hardware TSF, so we
+ * wait to synchronize beacons again. */
+ sc->sc_syncbeacon = 1;
+ goto ath_beacon_config_debug;
+ } else if ((tsftu + FUDGE) > hw_tsftu) {
+ if (tsftu > hw_tsftu + 2 * intval)
+ nexttbtt = roundup(hw_tsftu + FUDGE, intval);
+ else
+ nexttbtt = tsftu;
+ } else {
+ /* Normal case: we received a beacon to which
+ * we have synchronized. Make sure that nexttbtt
+ * is at least FUDGE TU ahead of hw_tsf */
+ nexttbtt = tsftu + roundup(hw_tsftu + FUDGE -
+ tsftu, intval);
}
}
@@ -5730,9 +5700,6 @@ ath_beacon_config(struct ath_softc *sc,
ath_beacon_dturbo_config(vap, intval &
~(HAL_BEACON_RESET_TSF | HAL_BEACON_ENA));
#endif
- if ((nexttbtt & HAL_BEACON_PERIOD) - (ath_hal_gettsf32(ah) >> 10)
- <= ath_hal_sw_beacon_response_time)
- nexttbtt += intval;
sc->sc_nexttbtt = nexttbtt;
/* stop beacons before reconfiguring the timers to avoid race
@@ -5889,7 +5856,7 @@ ath_desc_alloc(struct ath_softc *sc)
/* XXX allocate beacon state together with VAP */
error = ath_descdma_setup(sc, &sc->sc_bdma, &sc->sc_bbuf,
- "beacon", ath_maxvaps, 1);
+ "beacon", ATH_MAXVAPS_BCN, 1);
if (error != 0) {
ath_descdma_cleanup(sc, &sc->sc_txdma, &sc->sc_txbuf,
BUS_DMA_TODEVICE);
@@ -6680,7 +6647,7 @@ ath_recv_mgmt(struct ieee80211vap * vap,
/* Resync beacon timers using the tsf of the
* beacon frame we just received. */
vap->iv_flags_ext &= ~IEEE80211_FEXT_APPIE_UPDATE;
- ath_beacon_config(sc, vap);
+ ath_beacon_config(sc, vap, 0);
DPRINTF(sc, ATH_DEBUG_BEACON,
"Updated beacon timers\n");
}
@@ -9359,7 +9326,7 @@ ath_chan_set(struct ath_softc *sc, struc
* HW seems to turn off beacons during turbo mode switch.
*/
if (sc->sc_beacons && !sc->sc_dfs_cac)
- ath_beacon_config(sc, NULL);
+ ath_beacon_config(sc, NULL, 0);
/*
* Re-enable interrupts.
*/
@@ -9813,7 +9780,7 @@ ath_newstate(struct ieee80211vap *vap, e
ATH_DEBUG_BEACON_PROC,
"Beacons reconfigured by %p[%s]!\n",
vap, vap->iv_nickname);
- ath_beacon_config(sc, vap);
+ ath_beacon_config(sc, vap, 1);
sc->sc_beacons = 1;
}
} else {
@@ -9948,9 +9915,6 @@ ath_dfs_cac_completed(unsigned long data
}
netif_wake_queue(dev);
ath_reset(dev);
- if (sc->sc_beacons) {
- ath_beacon_config(sc, NULL);
- }
dev->watchdog_timeo = 5 * HZ; /* restore normal timeout */
} else {
do_gettimeofday(&tv);
@@ -11473,9 +11437,6 @@ ATH_SYSCTL_DECL(ath_sysctl_halparam, ctl
case ATH_OUTDOOR:
val = ic->ic_country_outdoor;
break;
- case ATH_MAXVAPS:
- val = ath_maxvaps;
- break;
case ATH_REGDOMAIN:
ath_hal_getregdomain(ah, &val);
break;
@@ -11606,12 +11567,6 @@ static const ctl_table ath_sysctl_templa
.extra2 = (void *)ATH_OUTDOOR,
},
{ .ctl_name = CTL_AUTO,
- .procname = "maxvaps",
- .mode = 0444,
- .proc_handler = ath_sysctl_halparam,
- .extra2 = (void *)ATH_MAXVAPS,
- },
- { .ctl_name = CTL_AUTO,
.procname = "regdomain",
.mode = 0644,
.proc_handler = ath_sysctl_halparam,
@@ -11928,13 +11883,6 @@ static ctl_table ath_static_sysctls[] =
},
#endif
{ .ctl_name = CTL_AUTO,
- .procname = "maxvaps",
- .mode = 0444,
- .data = &ath_maxvaps,
- .maxlen = sizeof(ath_maxvaps),
- .proc_handler = proc_dointvec
- },
- { .ctl_name = CTL_AUTO,
.procname = "xchanmode",
.mode = 0444,
.data = &ath_xchanmode,
--- a/ath/if_athvar.h
+++ b/ath/if_athvar.h
@@ -211,9 +211,7 @@ static inline struct net_device *_alloc_
#define ATH_RXBUF 40 /* number of RX buffers */
#define ATH_TXBUF 200 /* number of TX buffers */
-#define ATH_MAXVAPS_MIN 2 /* minimum number of beacon buffers */
-#define ATH_MAXVAPS_MAX 64 /* maximum number of beacon buffers */
-#define ATH_MAXVAPS_DEFAULT 4 /* default number of beacon buffers */
+#define ATH_MAXVAPS_BCN 4 /* maximum number of beacon buffers */
/* free buffer threshold to restart net dev */
#define ATH_TXBUF_FREE_THRESHOLD (ATH_TXBUF / 20)
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