1 files changed, 25 insertions, 0 deletions

diff --git a/include/linux/nl80211.h b/include/linux/nl80211.h
index fb877b5621b7..17c5c8849250 100644
--- a/include/linux/nl80211.h
+++ b/include/linux/nl80211.h
@@ -804,6 +804,28 @@ enum nl80211_commands {
  * @NL80211_ATTR_SUPPORT_IBSS_RSN: The device supports IBSS RSN, which mostly
  *      means support for per-station GTKs.
  *
+ * @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.
+ *
  * @NL80211_ATTR_MAX: highest attribute number currently defined
  * @__NL80211_ATTR_AFTER_LAST: internal use
  */
@@ -973,6 +995,9 @@ enum nl80211_attrs {
 
         NL80211_ATTR_SUPPORT_IBSS_RSN,
 
+        NL80211_ATTR_WIPHY_ANTENNA_TX,
+        NL80211_ATTR_WIPHY_ANTENNA_RX,
+
         /* add attributes here, update the policy in nl80211.c */
 
         __NL80211_ATTR_AFTER_LAST,