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>

4 files changed, 46 insertions, 1 deletions

diff --git a/net/mac80211/driver-ops.h b/net/mac80211/driver-ops.h
index e8dbda1b5b8a..0eb2bc003058 100644
--- a/net/mac80211/driver-ops.h
+++ b/net/mac80211/driver-ops.h
@@ -476,6 +476,21 @@ int drv_sta_state(struct ieee80211_local *local,
         return ret;
 }
 
+static inline void drv_sta_rc_update(struct ieee80211_local *local,
+                                     struct ieee80211_sub_if_data *sdata,
+                                     struct ieee80211_sta *sta, u32 changed)
+{
+        sdata = get_bss_sdata(sdata);
+        check_sdata_in_driver(sdata);
+
+        trace_drv_sta_rc_update(local, sdata, sta, changed);
+        if (local->ops->sta_rc_update)
+                local->ops->sta_rc_update(&local->hw, &sdata->vif,
+                                          sta, changed);
+
+        trace_drv_return_void(local);
+}
+
 static inline int drv_conf_tx(struct ieee80211_local *local,
                               struct ieee80211_sub_if_data *sdata, u16 queue,
                               const struct ieee80211_tx_queue_params *params)
diff --git a/net/mac80211/driver-trace.h b/net/mac80211/driver-trace.h
index 21d6f5290a1c..7ea544d86436 100644
--- a/net/mac80211/driver-trace.h
+++ b/net/mac80211/driver-trace.h
@@ -624,6 +624,34 @@ TRACE_EVENT(drv_sta_state,
         )
 );
 
+TRACE_EVENT(drv_sta_rc_update,
+        TP_PROTO(struct ieee80211_local *local,
+                 struct ieee80211_sub_if_data *sdata,
+                 struct ieee80211_sta *sta,
+                 u32 changed),
+
+        TP_ARGS(local, sdata, sta, changed),
+
+        TP_STRUCT__entry(
+                LOCAL_ENTRY
+                VIF_ENTRY
+                STA_ENTRY
+                __field(u32, changed)
+        ),
+
+        TP_fast_assign(
+                LOCAL_ASSIGN;
+                VIF_ASSIGN;
+                STA_ASSIGN;
+                __entry->changed = changed;
+        ),
+
+        TP_printk(
+                LOCAL_PR_FMT  VIF_PR_FMT  STA_PR_FMT " changed: 0x%x",
+                LOCAL_PR_ARG, VIF_PR_ARG, STA_PR_ARG, __entry->changed
+        )
+);
+
 TRACE_EVENT(drv_sta_add,
         TP_PROTO(struct ieee80211_local *local,
                  struct ieee80211_sub_if_data *sdata,
diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index 594af5f4079c..4974f998c7dd 100644
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -219,7 +219,7 @@ static u32 ieee80211_config_ht_tx(struct ieee80211_sub_if_data *sdata,
                         sta->sta.ht_cap.cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 
                 rate_control_rate_update(local, sband, sta,
-                                         IEEE80211_RC_HT_CHANGED);
+                                         IEEE80211_RC_BW_CHANGED);
         }
         mutex_unlock(&local->sta_mtx);
 
diff --git a/net/mac80211/rate.h b/net/mac80211/rate.h
index 27b66be8ac8f..6e4fd32c6617 100644
--- a/net/mac80211/rate.h
+++ b/net/mac80211/rate.h
@@ -17,6 +17,7 @@
 #include <net/mac80211.h>
 #include "ieee80211_i.h"
 #include "sta_info.h"
+#include "driver-ops.h"
 
 struct rate_control_ref {
         struct ieee80211_local *local;
@@ -72,6 +73,7 @@ static inline void rate_control_rate_update(struct ieee80211_local *local,
         if (ref && ref->ops->rate_update)
                 ref->ops->rate_update(ref->priv, sband, ista,
                                       priv_sta, changed);
+        drv_sta_rc_update(local, sta->sdata, &sta->sta, changed);
 }
 
 static inline void *rate_control_alloc_sta(struct rate_control_ref *ref,