mac80211: track number of spatial streams

With VHT, a station can change the number of spatial
streams it can receive on the fly, not unlike spatial
multiplexing in HT. Prepare for that by tracking the
maximum number of spatial streams it can receive when
the connection is established.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index 1e3b4f730397..a608ab9879b4 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -1237,6 +1237,10 @@ enum ieee80211_sta_rx_bandwidth {
  *      if wme is supported.
  * @max_sp: max Service Period. Only valid if wme is supported.
  * @bandwidth: current bandwidth the station can receive with
+ * @rx_nss: in HT/VHT, the maximum number of spatial streams the
+ *      station can receive at the moment, changed by operating mode
+ *      notifications and capabilities. The value is only valid after
+ *      the station moves to associated state.
  */
 struct ieee80211_sta {
         u32 supp_rates[IEEE80211_NUM_BANDS];
@@ -1247,6 +1251,7 @@ struct ieee80211_sta {
         bool wme;
         u8 uapsd_queues;
         u8 max_sp;
+        u8 rx_nss;
         enum ieee80211_sta_rx_bandwidth bandwidth;
 
         /* must be last */