/*
* Timer check on whether the VAP has had any transmit activity.
*
* This may schedule a transition from _RUN -> _SLEEP if it's appropriate.
*/
void
ieee80211_sta_ps_timer_check(struct ieee80211vap *vap)
{
struct ieee80211com *ic = vap->iv_ic;
/* XXX lock assert */
/* For no, only do this in STA mode */
if (! (vap->iv_caps & IEEE80211_C_SWSLEEP))
goto out;
if (vap->iv_opmode != IEEE80211_M_STA)
goto out;
/* If we're not at run state, bail */
if (vap->iv_state != IEEE80211_S_RUN)
goto out;
IEEE80211_DPRINTF(vap, IEEE80211_MSG_POWER,
"%s: lastdata=%llu, ticks=%llu\n",
__func__, (unsigned long long) ic->ic_lastdata,
(unsigned long long) ticks);
/* If powersave is disabled on the VAP, don't bother */
if (! (vap->iv_flags & IEEE80211_F_PMGTON))
goto out;
/* If we've done any data within our idle interval, bail */
/* XXX hard-coded to one second for now, ew! */
if (ieee80211_time_after(ic->ic_lastdata + 500, ticks))
goto out;
/*
* Signify we're going into power save and transition the
* node to powersave.
*/
if ((vap->iv_bss->ni_flags & IEEE80211_NODE_PWR_MGT) == 0)
vap->iv_sta_ps(vap, 1);
/*
* XXX The driver has to handle the fact that we're going
* to sleep but frames may still be transmitted;
* hopefully it and/or us will do the right thing and mark any
* transmitted frames with PWRMGT set to 1.
*/
ieee80211_new_state_locked(vap, IEEE80211_S_SLEEP, 0);
IEEE80211_DPRINTF(vap, IEEE80211_MSG_POWER,
"%s: time delta=%d msec\n", __func__,
(int) ticks_to_msecs(ticks - ic->ic_lastdata));
out:
return;
}
/*
* Handle being notified that we have data available for us in a TIM/ATIM.
*
* This may schedule a transition from _SLEEP -> _RUN if it's appropriate.
*/
void
ieee80211_sta_tim_notify(struct ieee80211vap *vap, int set)
{
/*
* Schedule the driver state change. It'll happen at some point soon.
* Since the hardware shouldn't know that we're running just yet
* (and thus tell the peer that we're awake before we actually wake
* up said hardware), we leave the actual node state transition
* up to the transition to RUN.
*
* XXX TODO: verify that the transition to RUN will wake up the
* BSS node!
*/
IEEE80211_DPRINTF(vap, IEEE80211_MSG_POWER, "%s: TIM=%d\n", __func__, set);
if (set == 1 && vap->iv_state == IEEE80211_S_SLEEP) {
ieee80211_new_state_locked(vap, IEEE80211_S_RUN, 0);
}
}
/*
* Handle being notified that we have data available for us in a TIM/ATIM.
*
* This may schedule a transition from _SLEEP -> _RUN if it's appropriate.
*
* In STA mode, we may have put to sleep during scan and need to be dragged
* back out of powersave mode.
*/
void
ieee80211_sta_tim_notify(struct ieee80211vap *vap, int set)
{
struct ieee80211com *ic = vap->iv_ic;
/*
* Schedule the driver state change. It'll happen at some point soon.
* Since the hardware shouldn't know that we're running just yet
* (and thus tell the peer that we're awake before we actually wake
* up said hardware), we leave the actual node state transition
* up to the transition to RUN.
*
* XXX TODO: verify that the transition to RUN will wake up the
* BSS node!
*/
IEEE80211_LOCK(vap->iv_ic);
if (set == 1 && vap->iv_state == IEEE80211_S_SLEEP) {
ieee80211_new_state_locked(vap, IEEE80211_S_RUN, 0);
IEEE80211_DPRINTF(vap, IEEE80211_MSG_POWER,
"%s: TIM=%d; wakeup\n", __func__, set);
} else if ((set == 1) && (ic->ic_flags_ext & IEEE80211_FEXT_BGSCAN)) {
/*
* XXX only do this if we're in RUN state?
*/
IEEE80211_DPRINTF(vap, IEEE80211_MSG_POWER,
"%s: wake up from bgscan vap sleep\n",
__func__);
/*
* We may be in BGSCAN mode - this means the VAP is is in STA
* mode powersave. If it is, we need to wake it up so we
* can process outbound traffic.
*/
vap->iv_sta_ps(vap, 0);
}
IEEE80211_UNLOCK(vap->iv_ic);
}