• Johannes Berg's avatar
    mac80211: let drivers inform it about per TID buffered frames · 042ec453
    Johannes Berg authored
    For uAPSD implementation, it is necessary to know on
    which ACs frames are buffered. mac80211 obviously
    knows about the frames it has buffered itself, but
    with aggregation many drivers buffer frames. Thus,
    mac80211 needs to be informed about this.
    
    For now, since we don't have APSD in any form, this
    will unconditionally set the TIM bit for the station
    but later with uAPSD only some ACs might cause the
    TIM bit to be set.
    
    ath9k is the only driver using this API and I only
    modify it in the most basic way, it won't be able
    to implement uAPSD with this yet. But it can't do
    that anyway since there's no way to selectively
    release frames to the peer yet.
    
    Since drivers will buffer frames per TID, let them
    inform mac80211 on a per TID basis, mac80211 will
    then sort out the AC mapping itself.
    Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
    Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
    042ec453
mac80211.h 132 KB