mac80211: support VHT association

Determine the VHT channel from the AP's VHT operation IE
(if present) and configure the hardware to that channel
if it is supported. If channel contexts cause a channel
to not be usable, try a smaller bandwidth.

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

1 files changed, 15 insertions, 0 deletions

diff --git a/include/linux/ieee80211.h b/include/linux/ieee80211.h
index f9c5a787d350..8f690e53dd89 100644
--- a/include/linux/ieee80211.h
+++ b/include/linux/ieee80211.h
@@ -1213,6 +1213,21 @@ struct ieee80211_vht_cap {
 } __packed;
 
 /**
+ * enum ieee80211_vht_chanwidth - VHT channel width
+ * @IEEE80211_VHT_CHANWIDTH_USE_HT: use the HT operation IE to
+ *      determine the channel width (20 or 40 MHz)
+ * @IEEE80211_VHT_CHANWIDTH_80MHZ: 80 MHz bandwidth
+ * @IEEE80211_VHT_CHANWIDTH_160MHZ: 160 MHz bandwidth
+ * @IEEE80211_VHT_CHANWIDTH_80P80MHZ: 80+80 MHz bandwidth
+ */
+enum ieee80211_vht_chanwidth {
+        IEEE80211_VHT_CHANWIDTH_USE_HT          = 0,
+        IEEE80211_VHT_CHANWIDTH_80MHZ           = 1,
+        IEEE80211_VHT_CHANWIDTH_160MHZ          = 2,
+        IEEE80211_VHT_CHANWIDTH_80P80MHZ        = 3,
+};
+
+/**
  * struct ieee80211_vht_operation - VHT operation IE
  *
  * This structure is the "VHT operation element" as