void
ieee80211_vap_iter_beacon_miss(void *arg, wlan_if_t vap)
{
systime_t tstamp;
systime_t last_link_time;
systime_t last_traffic_time;
struct ieee80211com *ic = vap->iv_ic;
struct ieee80211_mlme_priv *mlme_priv = vap->iv_mlme_priv;
ieee80211_mlme_event event;
IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN,
"%s: %s iv_bmiss_count=%d reset=%d max=%d arg=%08p swbmiss=%d\n",
__func__,
(arg != NULL) ? "SW" : "HW",
vap->iv_bmiss_count,
vap->iv_bmiss_count_for_reset,
vap->iv_bmiss_count_max,
arg,
mlme_sta_swbmiss_active(vap));
/*
* Our handling is only meaningful for stations that are
* associated; any other conditions else will be handled
* through different means (e.g. the tx timeout on mgt frames).
*/
if ((vap->iv_opmode != IEEE80211_M_STA) ||
!ieee80211_vap_ready_is_set(vap)) {
mlme_sta_swbmiss_timer_print_status(vap); /* print the status of sw bmiss */
return;
}
/*
* ignore HW beacon miss if SW beacon miss is enabled.
* and completely rely on SW beacon miss.
*/
if ((arg == NULL) && mlme_sta_swbmiss_active(vap)) {
return;
}
/*
* WAR for excessive beacon miss problem on SoC.
* Consider a beacon miss only when we have two consecutive
* beacon misses and there are no rx activities in between.
*
* Count beacon misses only if we gave the AP a chance by sending a
* directed Probe Request.
*
* Don't do anything if we are scanning a foreign channel.
* Trying to transmit a frame (Probe Request) during a channel change
* (which includes a channel reset) can cause a NMI due to invalid HW
* addresses.
* Trying to transmit a Probe Request while in a foreign channel
* wouldn't do us any good either.
*
* Query current time only after retrieving LastLinkTime. This avoids
* possible negative values if this routine is preempted by reception of
* a beacon or directed frame which would update the fields used to
* calculate LastLinkTime.
*/
last_traffic_time = ieee80211_get_directed_frame_timestamp(vap);
last_link_time = (vap->iv_last_beacon_time > last_traffic_time) ?
vap->iv_last_beacon_time : last_traffic_time;
tstamp = OS_GET_TIMESTAMP();
{
IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN,
"%d.%03d | %s: count=%d probe=%d beacon:%lums directed:%lums data:%lums ap_frame:%lums traffic_ind:%lums\n",
((u_int32_t) CONVERT_SYSTEM_TIME_TO_MS(tstamp)) / 1000,
((u_int32_t) CONVERT_SYSTEM_TIME_TO_MS(tstamp)) % 1000,
__func__, vap->iv_bmiss_count,
ieee80211_scan_can_transmit(ic->ic_scanner),
(u_int32_t) CONVERT_SYSTEM_TIME_TO_MS(tstamp - vap->iv_last_beacon_time),
(u_int32_t) CONVERT_SYSTEM_TIME_TO_MS(tstamp - last_traffic_time),
(u_int32_t) CONVERT_SYSTEM_TIME_TO_MS(tstamp - vap->iv_lastdata),
(u_int32_t) CONVERT_SYSTEM_TIME_TO_MS(tstamp - vap->iv_last_ap_frame),
(u_int32_t) CONVERT_SYSTEM_TIME_TO_MS(tstamp - vap->iv_last_traffic_indication));
}
/*
* Do not count beacon misses received when we're off-channel, or
* within IEEE80211_MINIMUM_BMISS_TIME ms of the last valid beacon.
*/
if ((! ieee80211_scan_in_home_channel(ic->ic_scanner)) ||
(CONVERT_SYSTEM_TIME_TO_MS(tstamp - last_link_time) < IEEE80211_MINIMUM_BMISS_TIME)) {
mlme_sta_swbmiss_timer_start(vap); /* restart beacon miss timer */
return;
}
vap->iv_bmiss_count++;
event.u.event_bmiss.cur_bmiss_count = vap->iv_bmiss_count;
event.u.event_bmiss.max_bmiss_count = vap->iv_bmiss_count_for_reset;
event.type = IEEE80211_MLME_EVENT_BEACON_MISS;
ieee80211_mlme_deliver_event(mlme_priv,&event);
if (vap->iv_bmiss_count < vap->iv_bmiss_count_for_reset) {
#ifdef ATH_SWRETRY
/* Turn off the sw retry mechanism until we receive
* any data frame or probe response for the BSS we are
* associated to.
*/
ic->ic_set_swretrystate(vap->iv_bss, FALSE);
#endif
/*
* It is possible that the hardware gets into
* deaf mode. Reset the hardware to see if it can recover
* from the condition.
*/
/* indicate device error */
IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN, "%s: Beacon miss, do internal reset!!\n", __func__);
IEEE80211_DELIVER_EVENT_DEVICE_ERROR(vap);
mlme_sta_swbmiss_timer_start(vap); /* restart beacon miss timer */
return;
}
/* max bmiss count reached */
vap->iv_bmiss_count = 0; /* reset bmiss counter */
IEEE80211_DPRINTF(vap, IEEE80211_MSG_ANY, "%s: Beacon miss, will indicate to OS!!\n", __func__);
/* indicate beacon miss */
IEEE80211_DELIVER_EVENT_BEACON_MISS(vap);
}
systime_t wlan_get_directed_frame_timestamp(wlan_if_t vaphandle)
{
return ieee80211_get_directed_frame_timestamp(vaphandle);
}
