• Emmanuel Grumbach's avatar
    mac80211: implement SMPS for AP · 687da132
    Emmanuel Grumbach authored
    When the driver requests to move to STATIC or DYNAMIC SMPS,
    we send an action frame to each associated station and
    reconfigure the channel context / driver.
    Of course, non-MIMO stations are ignored.
    The beacon isn't updated. The association response will
    include the original capabilities. Stations that associate
    while in non-OFF SMPS mode will get an action frame right
    after association to inform them about our current state.
    Note that we wait until the end of the EAPOL. Sending an
    action frame before the EAPOL is finished can be an issue
    for a few clients. Clients aren't likely to send EAPOL
    frames in MIMO anyway.
    When the SMPS configuration gets more permissive (e.g.
    STATIC -> OFF), we don't wake up stations that are asleep
    We remember that they don't know about the change and send
    the action frame when they wake up.
    When the SMPS configuration gets more restrictive (e.g.
    OFF -> STATIC), we set the TIM bit for every sleeping STA.
    uAPSD stations might send MIMO until they poll the action
    frame, but this is for a short period of time.
    Signed-off-by: default avatarEmmanuel Grumbach <emmanuel.grumbach@intel.com>
    [fix vht streams loop, initialisation]
    Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
cfg.c 102 KB