mac80211: export the expected throughput

Add get_expected_throughput() API to mac80211 so that each
driver can implement its own version based on the RC
algorithm they are using (might be using an HW RC algo).
The API returns a value expressed in Kbps.

Also, add the new get_expected_throughput() member
to the rate_control_ops structure in order to be
able to query the RC algorithm (this patch provides an
implementation of this API for both minstrel and
minstrel_ht).

The related member in the station_info object is now
filled accordingly when dumping a station.

Cc: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: Antonio Quartulli <antonio@open-mesh.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index a34f26a4ed18..2c78997bc48d 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -2769,6 +2769,10 @@ enum ieee80211_roc_type {
  *      information in bss_conf is set up and the beacon can be retrieved. A
  *      channel context is bound before this is called.
  * @leave_ibss: Leave the IBSS again.
+ *
+ * @get_expected_throughput: extract the expected throughput towards the
+ *      specified station. The returned value is expressed in Kbps. It returns 0
+ *      if the RC algorithm does not have proper data to provide.
  */
 struct ieee80211_ops {
         void (*tx)(struct ieee80211_hw *hw,
@@ -2962,6 +2966,7 @@ struct ieee80211_ops {
 
         int (*join_ibss)(struct ieee80211_hw *hw, struct ieee80211_vif *vif);
         void (*leave_ibss)(struct ieee80211_hw *hw, struct ieee80211_vif *vif);
+        u32 (*get_expected_throughput)(struct ieee80211_sta *sta);
 };
 
 /**
@@ -4535,6 +4540,8 @@ struct rate_control_ops {
         void (*add_sta_debugfs)(void *priv, void *priv_sta,
                                 struct dentry *dir);
         void (*remove_sta_debugfs)(void *priv, void *priv_sta);
+
+        u32 (*get_expected_throughput)(void *priv_sta);
 };
 
 static inline int rate_supported(struct ieee80211_sta *sta,