++ * @NL80211_ATTR_WIPHY_ANTENNA_TX: Bitmap of allowed antennas for transmitting.
++ * This can be used to mask out antennas which are not attached or should
++ * not be used for transmitting. If an antenna is not selected in this
++ * bitmap the hardware is not allowed to transmit on this antenna.
++ *
++ * Each bit represents one antenna, starting with antenna 1 at the first
++ * bit. Depending on which antennas are selected in the bitmap, 802.11n
++ * drivers can derive which chainmasks to use (if all antennas belonging to
++ * a particular chain are disabled this chain should be disabled) and if
++ * a chain has diversity antennas wether diversity should be used or not.
++ * HT capabilities (STBC, TX Beamforming, Antenna selection) can be
++ * derived from the available chains after applying the antenna mask.
++ * Non-802.11n drivers can derive wether to use diversity or not.
++ * Drivers may reject configurations or RX/TX mask combinations they cannot
++ * support by returning -EINVAL.
++ *
++ * @NL80211_ATTR_WIPHY_ANTENNA_RX: Bitmap of allowed antennas for receiving.
++ * This can be used to mask out antennas which are not attached or should
++ * not be used for receiving. If an antenna is not selected in this bitmap
++ * the hardware should not be configured to receive on this antenna.
++ * For a more detailed descripton see @NL80211_ATTR_WIPHY_ANTENNA_TX.
++ *