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mac80211: allow software PS-Poll/U-APSD with AP_LINK_PS

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When using RSS, frames might not be processed in the correct order,
and thus AP_LINK_PS must be used; most likely with firmware keeping
track of the powersave state, this is the case in iwlwifi now.

In this case, the driver can use ieee80211_sta_ps_transition() to
still have mac80211 manage powersave buffering. However, for U-APSD
and PS-Poll this isn't sufficient. If the device can't manage that
entirely on its own, mac80211's code should be used.

To allow this, export two functions: ieee80211_sta_uapsd_trigger()
and ieee80211_sta_pspoll().

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg 2016-05-03 16:58:00 +03:00
parent 53873f134d
commit 46fa38e84b
2 changed files with 71 additions and 26 deletions
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27
include/net/mac80211.h
View file

@ -3996,6 +3996,33 @@ static inline int ieee80211_sta_ps_transition_ni(struct ieee80211_sta *sta,
return ret;
}
/**
* ieee80211_sta_pspoll - PS-Poll frame received
* @sta: currently connected station
*
* When operating in AP mode with the %IEEE80211_HW_AP_LINK_PS flag set,
* use this function to inform mac80211 that a PS-Poll frame from a
* connected station was received.
* This must be used in conjunction with ieee80211_sta_ps_transition()
* and possibly ieee80211_sta_uapsd_trigger(); calls to all three must
* be serialized.
*/
void ieee80211_sta_pspoll(struct ieee80211_sta *sta);
/**
* ieee80211_sta_uapsd_trigger - (potential) U-APSD trigger frame received
* @sta: currently connected station
* @tid: TID of the received (potential) trigger frame
*
* When operating in AP mode with the %IEEE80211_HW_AP_LINK_PS flag set,
* use this function to inform mac80211 that a (potential) trigger frame
* from a connected station was received.
* This must be used in conjunction with ieee80211_sta_ps_transition()
* and possibly ieee80211_sta_pspoll(); calls to all three must be
* serialized.
*/
void ieee80211_sta_uapsd_trigger(struct ieee80211_sta *sta, u8 tid);
/*
* The TX headroom reserved by mac80211 for its own tx_status functions.
* This is enough for the radiotap header.