mac80211: notify driver of rate control updates

Devices that have internal rate control need to be
notified when the bandwidth or SMPS state changes
just like external rate control algorithms get a
notification now.

Add this notification and clarify the change bits
while at it, the HT_CHANGED bit really meant only
bandwidth changed.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 24 insertions, 13 deletions

diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index 21c653415d84..dc0d3e715759 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -1780,6 +1780,18 @@ enum ieee80211_frame_release_type {
 };
 
 /**
+ * enum ieee80211_rate_control_changed - flags to indicate what changed
+ *
+ * @IEEE80211_RC_BW_CHANGED: The bandwidth that can be used to transmit
+ *      to this station changed.
+ * @IEEE80211_RC_SMPS_CHANGED: The SMPS state of the station changed.
+ */
+enum ieee80211_rate_control_changed {
+        IEEE80211_RC_BW_CHANGED         = BIT(0),
+        IEEE80211_RC_SMPS_CHANGED       = BIT(1),
+};
+
+/**
  * struct ieee80211_ops - callbacks from mac80211 to the driver
  *
  * This structure contains various callbacks that the driver may
@@ -1980,6 +1992,14 @@ enum ieee80211_frame_release_type {
  *      up the list of states.
  *      The callback can sleep.
  *
+ * @sta_rc_update: Notifies the driver of changes to the bitrates that can be
+ *      used to transmit to the station. The changes are advertised with bits
+ *      from &enum ieee80211_rate_control_changed and the values are reflected
+ *      in the station data. This callback should only be used when the driver
+ *      uses hardware rate control (%IEEE80211_HW_HAS_RATE_CONTROL) since
+ *      otherwise the rate control algorithm is notified directly.
+ *      Must be atomic.
+ *
  * @conf_tx: Configure TX queue parameters (EDCF (aifs, cw_min, cw_max),
  *      bursting) for a hardware TX queue.
  *      Returns a negative error code on failure.
@@ -2196,6 +2216,10 @@ struct ieee80211_ops {
                          struct ieee80211_sta *sta,
                          enum ieee80211_sta_state old_state,
                          enum ieee80211_sta_state new_state);
+        void (*sta_rc_update)(struct ieee80211_hw *hw,
+                              struct ieee80211_vif *vif,
+                              struct ieee80211_sta *sta,
+                              u32 changed);
         int (*conf_tx)(struct ieee80211_hw *hw,
                        struct ieee80211_vif *vif, u16 queue,
                        const struct ieee80211_tx_queue_params *params);
@@ -3512,19 +3536,6 @@ void ieee80211_send_bar(struct ieee80211_vif *vif, u8 *ra, u16 tid, u16 ssn);
 /* Rate control API */
 
 /**
- * enum rate_control_changed - flags to indicate which parameter changed
- *
- * @IEEE80211_RC_HT_CHANGED: The HT parameters of the operating channel have
- *      changed, rate control algorithm can update its internal state if needed.
- * @IEEE80211_RC_SMPS_CHANGED: The SMPS state of the station changed, the rate
- *      control algorithm needs to adjust accordingly.
- */
-enum rate_control_changed {
-        IEEE80211_RC_HT_CHANGED         = BIT(0),
-        IEEE80211_RC_SMPS_CHANGED       = BIT(1),
-};
-
-/**
  * struct ieee80211_tx_rate_control - rate control information for/from RC algo
  *
  * @hw: The hardware the algorithm is invoked for.