enum ieee80211_tx_queue — transmit queue number
enum ieee80211_tx_queue {
IEEE80211_TX_QUEUE_DATA0,
IEEE80211_TX_QUEUE_DATA1,
IEEE80211_TX_QUEUE_DATA2,
IEEE80211_TX_QUEUE_DATA3,
IEEE80211_TX_QUEUE_DATA4,
IEEE80211_TX_QUEUE_SVP,
NUM_TX_DATA_QUEUES,
IEEE80211_TX_QUEUE_AFTER_BEACON,
IEEE80211_TX_QUEUE_BEACON,
NUM_TX_DATA_QUEUES_AMPDU
}; data queue 0
data queue 1
data queue 2
data queue 3
data queue 4
??
number of data queues
transmit queue for frames to be sent after a beacon
transmit queue for beacon frames
adding more queues for A-MPDU