• Toke Høiland-Jørgensen's avatar
    mac80211: Add TXQ scheduling API · 18667600
    Toke Høiland-Jørgensen authored
    This adds an API to mac80211 to handle scheduling of TXQs. The interface
    between driver and mac80211 for TXQ handling is changed by adding two new
    functions: ieee80211_next_txq(), which will return the next TXQ to schedule
    in the current round-robin rotation, and ieee80211_return_txq(), which the
    driver uses to indicate that it has finished scheduling a TXQ (which will
    then be put back in the scheduling rotation if it isn't empty).
    
    The driver must call ieee80211_txq_schedule_start() at the start of each
    scheduling session, and ieee80211_txq_schedule_end() at the end. The API
    then guarantees that the same TXQ is not returned twice in the same
    session (so a driver can loop on ieee80211_next_txq() without worrying
    about breaking the loop.
    
    Usage of the new API is optional, so drivers can be ported one at a time.
    In this patch, the actual scheduling performed by mac80211 is simple
    round-robin, but a subsequent commit adds airtime fairness awareness to the
    scheduler.
    Signed-off-by: default avatarToke Høiland-Jørgensen <toke@toke.dk>
    [minor kernel-doc fix, propagate sparse locking checks out]
    Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
    18667600
driver-ops.h 33.3 KB