mac80211: introduce new ieee80211_ops

Introduce channel context driver methods. The channel
on a context channel is immutable, but the channel type
and other properties can change.

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index ab1b5ba..d9d2119 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -2353,6 +2353,16 @@
  *	The callback will be called before each transmission and upon return
  *	mac80211 will transmit the frame right away.
  *	The callback is optional and can (should!) sleep.
+ *
+ * @add_chanctx: Notifies device driver about new channel context creation.
+ * @remove_chanctx: Notifies device driver about channel context destruction.
+ * @change_chanctx: Notifies device driver about channel context changes that
+ *	may happen when combining different virtual interfaces on the same
+ *	channel context with different settings
+ * @assign_vif_chanctx: Notifies device driver about channel context being bound
+ *	to vif. Possible use is for hw queue remapping.
+ * @unassign_vif_chanctx: Notifies device driver about channel context being
+ *	unbound from vif.
  */
 struct ieee80211_ops {
 	void (*tx)(struct ieee80211_hw *hw,
@@ -2497,6 +2507,20 @@
 
 	void	(*mgd_prepare_tx)(struct ieee80211_hw *hw,
 				  struct ieee80211_vif *vif);
+
+	int (*add_chanctx)(struct ieee80211_hw *hw,
+			   struct ieee80211_chanctx_conf *ctx);
+	void (*remove_chanctx)(struct ieee80211_hw *hw,
+			       struct ieee80211_chanctx_conf *ctx);
+	void (*change_chanctx)(struct ieee80211_hw *hw,
+			       struct ieee80211_chanctx_conf *ctx,
+			       u32 changed);
+	int (*assign_vif_chanctx)(struct ieee80211_hw *hw,
+				  struct ieee80211_vif *vif,
+				  struct ieee80211_chanctx_conf *ctx);
+	void (*unassign_vif_chanctx)(struct ieee80211_hw *hw,
+				     struct ieee80211_vif *vif,
+				     struct ieee80211_chanctx_conf *ctx);
 };
 
 /**