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ath9k: Cleanup beacon logic 

* The beaconing status routine is not required, since in
  multi-VIF cases the HW beacon parameters should not be
  re-configured.

* Remove SC_OP_TSF_RESET - when a beaconing interface comes
  up the first time, the TSF has to be reset.

* Simplify ath9k_allow_beacon_config().

* Handle setting/clearing the SWBA interrupt properly.

* Remove the TSF mangling in IBSS mode, it is not required.

* General code cleanup.

Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Sujith Manoharan 2012-07-17 17:15:56 +05:30 committed by John W. Linville
parent 6c43c090a9
commit ef4ad63368
4 changed files with 99 additions and 163 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/net/wireless/ath/ath9k/ath9k.h
View File

@ -389,6 +389,7 @@ struct ath_beacon_config {
u16 dtim_period;
u16 bmiss_timeout;
u8 dtim_count;
bool enable_beacon;
};
struct ath_beacon {
@ -415,11 +416,13 @@ struct ath_beacon {
};
void ath_beacon_tasklet(unsigned long data);
void ath_beacon_config(struct ath_softc *sc, struct ieee80211_vif *vif);
bool ath9k_allow_beacon_config(struct ath_softc *sc, struct ieee80211_vif *vif);
void ath9k_beacon_config(struct ath_softc *sc, struct ieee80211_vif *vif,
u32 changed);
void ath9k_beacon_assign_slot(struct ath_softc *sc, struct ieee80211_vif *vif);
void ath9k_beacon_remove_slot(struct ath_softc *sc, struct ieee80211_vif *vif);
int ath_beaconq_config(struct ath_softc *sc);
void ath_set_beacon(struct ath_softc *sc);
void ath9k_set_beacon(struct ath_softc *sc);
void ath9k_set_beaconing_status(struct ath_softc *sc, bool status);
/*******************/
@ -622,7 +625,6 @@ enum sc_op_flags {
SC_OP_INVALID,
SC_OP_BEACONS,
SC_OP_RXFLUSH,
SC_OP_TSF_RESET,
SC_OP_ANI_RUN,
SC_OP_PRIM_STA_VIF,
SC_OP_HW_RESET,

206
drivers/net/wireless/ath/ath9k/beacon.c
View File

@ -315,7 +315,6 @@ void ath_beacon_tasklet(unsigned long data)
} else if (sc->beacon.bmisscnt >= BSTUCK_THRESH) {
ath_dbg(common, BSTUCK, "beacon is officially stuck\n");
sc->beacon.bmisscnt = 0;
set_bit(SC_OP_TSF_RESET, &sc->sc_flags);
ieee80211_queue_work(sc->hw, &sc->hw_reset_work);
}
@ -401,21 +400,16 @@ void ath_beacon_tasklet(unsigned long data)
}
}
static void ath9k_beacon_init(struct ath_softc *sc,
u32 next_beacon,
u32 beacon_period)
static void ath9k_beacon_init(struct ath_softc *sc, u32 nexttbtt, u32 intval)
{
if (test_bit(SC_OP_TSF_RESET, &sc->sc_flags)) {
ath9k_ps_wakeup(sc);
ath9k_hw_reset_tsf(sc->sc_ah);
}
struct ath_hw *ah = sc->sc_ah;
ath9k_hw_beaconinit(sc->sc_ah, next_beacon, beacon_period);
if (test_bit(SC_OP_TSF_RESET, &sc->sc_flags)) {
ath9k_ps_restore(sc);
clear_bit(SC_OP_TSF_RESET, &sc->sc_flags);
}
ath9k_hw_disable_interrupts(ah);
ath9k_hw_reset_tsf(ah);
ath9k_hw_beaconinit(ah, nexttbtt, intval);
sc->beacon.bmisscnt = 0;
ath9k_hw_set_interrupts(ah);
ath9k_hw_enable_interrupts(ah);
}
/*
@ -423,32 +417,28 @@ static void ath9k_beacon_init(struct ath_softc *sc,
* burst together. For the former arrange for the SWBA to be delivered for each
* slot. Slots that are not occupied will generate nothing.
*/
static void ath_beacon_config_ap(struct ath_softc *sc,
static void ath9k_beacon_config_ap(struct ath_softc *sc,
struct ath_beacon_config *conf)
{
struct ath_hw *ah = sc->sc_ah;
struct ath_common *common = ath9k_hw_common(ah);
u32 nexttbtt, intval;
/* NB: the beacon interval is kept internally in TU's */
intval = TU_TO_USEC(conf->beacon_interval);
intval /= ATH_BCBUF; /* for staggered beacons */
intval /= ATH_BCBUF;
nexttbtt = intval;
/*
* In AP mode we enable the beacon timers and SWBA interrupts to
* prepare beacon frames.
*/
if (conf->enable_beacon)
ah->imask |= ATH9K_INT_SWBA;
else
ah->imask &= ~ATH9K_INT_SWBA;
ath_dbg(common, BEACON, "AP nexttbtt: %u intval: %u conf_intval: %u\n",
nexttbtt, intval, conf->beacon_interval);
ath_beaconq_config(sc);
/* Set the computed AP beacon timers */
ath9k_hw_disable_interrupts(ah);
set_bit(SC_OP_TSF_RESET, &sc->sc_flags);
ath9k_beacon_init(sc, nexttbtt, intval);
sc->beacon.bmisscnt = 0;
ath9k_hw_set_interrupts(ah);
ath9k_hw_enable_interrupts(ah);
}
/*
@ -459,7 +449,7 @@ static void ath_beacon_config_ap(struct ath_softc *sc,
* we'll receive a BMISS interrupt when we stop seeing beacons from the AP
* we've associated with.
*/
static void ath_beacon_config_sta(struct ath_softc *sc,
static void ath9k_beacon_config_sta(struct ath_softc *sc,
struct ath_beacon_config *conf)
{
struct ath_hw *ah = sc->sc_ah;
@ -579,97 +569,66 @@ static void ath_beacon_config_sta(struct ath_softc *sc,
ath9k_hw_enable_interrupts(ah);
}
static void ath_beacon_config_adhoc(struct ath_softc *sc,
static void ath9k_beacon_config_adhoc(struct ath_softc *sc,
struct ath_beacon_config *conf)
{
struct ath_hw *ah = sc->sc_ah;
struct ath_common *common = ath9k_hw_common(ah);
u32 tsf, intval, nexttbtt;
u32 intval, nexttbtt;
ath9k_reset_beacon_status(sc);
if (!test_bit(SC_OP_BEACONS, &sc->sc_flags))
ath9k_hw_settsf64(ah, sc->beacon.bc_tstamp);
intval = TU_TO_USEC(conf->beacon_interval);
tsf = roundup(ath9k_hw_gettsf32(ah) + TU_TO_USEC(FUDGE), intval);
nexttbtt = tsf + intval;
nexttbtt = intval;
ath_dbg(common, BEACON, "IBSS nexttbtt %u intval %u (%u)\n",
if (conf->enable_beacon)
ah->imask |= ATH9K_INT_SWBA;
else
ah->imask &= ~ATH9K_INT_SWBA;
ath_dbg(common, BEACON, "IBSS nexttbtt: %u intval: %u conf_intval: %u\n",
nexttbtt, intval, conf->beacon_interval);
/*
* In IBSS mode enable the beacon timers but only enable SWBA interrupts
* if we need to manually prepare beacon frames. Otherwise we use a
* self-linked tx descriptor and let the hardware deal with things.
*/
ah->imask |= ATH9K_INT_SWBA;
ath_beaconq_config(sc);
/* Set the computed ADHOC beacon timers */
ath9k_hw_disable_interrupts(ah);
ath9k_beacon_init(sc, nexttbtt, intval);
sc->beacon.bmisscnt = 0;
ath9k_hw_set_interrupts(ah);
ath9k_hw_enable_interrupts(ah);
}
static bool ath9k_allow_beacon_config(struct ath_softc *sc,
struct ieee80211_vif *vif)
bool ath9k_allow_beacon_config(struct ath_softc *sc, struct ieee80211_vif *vif)
{
struct ath_beacon_config *cur_conf = &sc->cur_beacon_conf;
struct ath_common *common = ath9k_hw_common(sc->sc_ah);
struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
struct ath_vif *avp = (void *)vif->drv_priv;
/*
* Can not have different beacon interval on multiple
* AP interface case
*/
if ((sc->sc_ah->opmode == NL80211_IFTYPE_AP) &&
(sc->nbcnvifs > 1) &&
(vif->type == NL80211_IFTYPE_AP) &&
(cur_conf->beacon_interval != bss_conf->beacon_int)) {
if (sc->sc_ah->opmode == NL80211_IFTYPE_AP) {
if ((vif->type != NL80211_IFTYPE_AP) ||
(sc->nbcnvifs > 1)) {
ath_dbg(common, CONFIG,
"Changing beacon interval of multiple AP interfaces !\n");
"An AP interface is already present !\n");
return false;
}
/*
* Can not configure station vif's beacon config
* while on AP opmode
*/
if ((sc->sc_ah->opmode == NL80211_IFTYPE_AP) &&
(vif->type != NL80211_IFTYPE_AP)) {
ath_dbg(common, CONFIG,
"STA vif's beacon not allowed on AP mode\n");
return false;
}
/*
* Do not allow beacon config if HW was already configured
* with another STA vif
*/
if ((sc->sc_ah->opmode == NL80211_IFTYPE_STATION) &&
(vif->type == NL80211_IFTYPE_STATION) &&
if (sc->sc_ah->opmode == NL80211_IFTYPE_STATION) {
if ((vif->type == NL80211_IFTYPE_STATION) &&
test_bit(SC_OP_BEACONS, &sc->sc_flags) &&
!avp->primary_sta_vif) {
ath_dbg(common, CONFIG,
"Beacon already configured for a station interface\n");
return false;
}
}
return true;
}
void ath_beacon_config(struct ath_softc *sc, struct ieee80211_vif *vif)
static void ath9k_cache_beacon_config(struct ath_softc *sc,
struct ieee80211_bss_conf *bss_conf)
{
struct ath_common *common = ath9k_hw_common(sc->sc_ah);
struct ath_beacon_config *cur_conf = &sc->cur_beacon_conf;
struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
if (!ath9k_allow_beacon_config(sc, vif))
return;
ath_dbg(common, BEACON,
"Caching beacon data for BSS: %pM\n", bss_conf->bssid);
/* Setup the beacon configuration parameters */
cur_conf->beacon_interval = bss_conf->beacon_int;
cur_conf->dtim_period = bss_conf->dtim_period;
cur_conf->listen_interval = 1;
@ -694,73 +653,62 @@ void ath_beacon_config(struct ath_softc *sc, struct ieee80211_vif *vif)
if (cur_conf->dtim_period == 0)
cur_conf->dtim_period = 1;
ath_set_beacon(sc);
}
static bool ath_has_valid_bslot(struct ath_softc *sc)
void ath9k_beacon_config(struct ath_softc *sc, struct ieee80211_vif *vif,
u32 changed)
{
struct ath_vif *avp;
int slot;
bool found = false;
struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
struct ath_beacon_config *cur_conf = &sc->cur_beacon_conf;
for (slot = 0; slot < ATH_BCBUF; slot++) {
if (sc->beacon.bslot[slot]) {
avp = (void *)sc->beacon.bslot[slot]->drv_priv;
if (avp->is_bslot_active) {
found = true;
break;
if (sc->sc_ah->opmode == NL80211_IFTYPE_STATION) {
ath9k_cache_beacon_config(sc, bss_conf);
ath9k_set_beacon(sc);
set_bit(SC_OP_BEACONS, &sc->sc_flags);
} else {
/*
* Take care of multiple interfaces when
* enabling/disabling SWBA.
*/
if (changed & BSS_CHANGED_BEACON_ENABLED) {
if (!bss_conf->enable_beacon &&
(sc->nbcnvifs <= 1)) {
cur_conf->enable_beacon = false;
} else if (bss_conf->enable_beacon) {
cur_conf->enable_beacon = true;
ath9k_cache_beacon_config(sc, bss_conf);
}
}
}
return found;
}
if (cur_conf->beacon_interval) {
ath9k_set_beacon(sc);
void ath_set_beacon(struct ath_softc *sc)
if (cur_conf->enable_beacon)
set_bit(SC_OP_BEACONS, &sc->sc_flags);
else
clear_bit(SC_OP_BEACONS, &sc->sc_flags);
}
}
}
void ath9k_set_beacon(struct ath_softc *sc)
{
struct ath_common *common = ath9k_hw_common(sc->sc_ah);
struct ath_beacon_config *cur_conf = &sc->cur_beacon_conf;
switch (sc->sc_ah->opmode) {
case NL80211_IFTYPE_AP:
if (ath_has_valid_bslot(sc))
ath_beacon_config_ap(sc, cur_conf);
ath9k_beacon_config_ap(sc, cur_conf);
break;
case NL80211_IFTYPE_ADHOC:
case NL80211_IFTYPE_MESH_POINT:
ath_beacon_config_adhoc(sc, cur_conf);
ath9k_beacon_config_adhoc(sc, cur_conf);
break;
case NL80211_IFTYPE_STATION:
ath_beacon_config_sta(sc, cur_conf);
ath9k_beacon_config_sta(sc, cur_conf);
break;
default:
ath_dbg(common, CONFIG, "Unsupported beaconing mode\n");
return;
}
set_bit(SC_OP_BEACONS, &sc->sc_flags);
}
void ath9k_set_beaconing_status(struct ath_softc *sc, bool status)
{
struct ath_hw *ah = sc->sc_ah;
if (!ath_has_valid_bslot(sc)) {
clear_bit(SC_OP_BEACONS, &sc->sc_flags);
return;
}
ath9k_ps_wakeup(sc);
if (status) {
/* Re-enable beaconing */
ah->imask |= ATH9K_INT_SWBA;
ath9k_hw_set_interrupts(ah);
} else {
/* Disable SWBA interrupt */
ah->imask &= ~ATH9K_INT_SWBA;
ath9k_hw_set_interrupts(ah);
tasklet_kill(&sc->bcon_tasklet);
ath9k_hw_stop_dma_queue(ah, sc->beacon.beaconq);
}
ath9k_ps_restore(sc);
}

24
drivers/net/wireless/ath/ath9k/main.c
View File

@ -236,7 +236,7 @@ static bool ath_complete_reset(struct ath_softc *sc, bool start)
if (!test_bit(SC_OP_BEACONS, &sc->sc_flags))
goto work;
ath_set_beacon(sc);
ath9k_set_beacon(sc);
if (ah->opmode == NL80211_IFTYPE_STATION &&
test_bit(SC_OP_PRIM_STA_VIF, &sc->sc_flags)) {
@ -1533,24 +1533,10 @@ static void ath9k_bss_info_changed(struct ieee80211_hw *hw,
}
}
/*
* In case of AP mode, the HW TSF has to be reset
* when the beacon interval changes.
*/
if ((changed & BSS_CHANGED_BEACON_INT) &&
(vif->type == NL80211_IFTYPE_AP))
set_bit(SC_OP_TSF_RESET, &sc->sc_flags);
/* Configure beaconing (AP, IBSS, MESH) */
if (ath9k_uses_beacons(vif->type) &&
((changed & BSS_CHANGED_BEACON) ||
(changed & BSS_CHANGED_BEACON_ENABLED) ||
(changed & BSS_CHANGED_BEACON_INT))) {
ath9k_set_beaconing_status(sc, false);
if (!bss_conf->enable_beacon)
avp->is_bslot_active = false;
ath_beacon_config(sc, vif);
ath9k_set_beaconing_status(sc, true);
if ((changed & BSS_CHANGED_BEACON_ENABLED) ||
(changed & BSS_CHANGED_BEACON_INT)) {
if (ath9k_allow_beacon_config(sc, vif))
ath9k_beacon_config(sc, vif, changed);
}
if (changed & BSS_CHANGED_ERP_SLOT) {

2
drivers/net/wireless/ath/ath9k/recv.c
View File

@ -553,7 +553,7 @@ static void ath_rx_ps_beacon(struct ath_softc *sc, struct sk_buff *skb)
sc->ps_flags &= ~PS_BEACON_SYNC;
ath_dbg(common, PS,
"Reconfigure Beacon timers based on timestamp from the AP\n");
ath_set_beacon(sc);
ath9k_set_beacon(sc);
}
if (ath_beacon_dtim_pending_cab(skb)) {