mac80211: notify driver on airtime weight changes

Add a new sta_set_airtime_weight driver op so drivers can program the
airtime fairness weight into hardware.

Signed-off-by: Felix Fietkau <nbd@nbd.name>

diff --git a/package/kernel/mac80211/patches/subsys/390-wifi-mac80211-notify-driver-on-airtime-weight-change.patch b/package/kernel/mac80211/patches/subsys/390-wifi-mac80211-notify-driver-on-airtime-weight-change.patch
new file mode 100644 (file)
index 0000000..0de78a4
--- /dev/null
+++ b/package/kernel/mac80211/patches/subsys/390-wifi-mac80211-notify-driver-on-airtime-weight-change.patch
@@ -0,0 +1,143 @@
+From: Felix Fietkau <nbd@nbd.name>
+Date: Wed, 10 Jun 2026 11:22:25 +0000
+Subject: [PATCH] wifi: mac80211: notify driver on airtime weight changes
+
+Add a new sta_set_airtime_weight driver op so drivers can program the
+airtime fairness weight into hardware. The op is called when the weight
+is updated via sta_apply_parameters, and on station upload if a
+non-default weight is already set.
+
+Signed-off-by: Felix Fietkau <nbd@nbd.name>
+---
+
+--- a/include/net/mac80211.h
++++ b/include/net/mac80211.h
+@@ -4484,6 +4484,8 @@ struct ieee80211_prep_tx_info {
+  * @set_sar_specs: Update the SAR (TX power) settings.
+  * @sta_set_decap_offload: Called to notify the driver when a station is allowed
+  *    to use rx decapsulation offload
++ * @sta_set_airtime_weight: Called to notify the driver of a change to a
++ *    station's airtime fairness weight, so it can be programmed in hardware.
+  * @add_twt_setup: Update hw with TWT agreement parameters received from the peer.
+  *    This callback allows the hw to check if requested parameters
+  *    are supported and if there is enough room for a new agreement.
+@@ -4896,6 +4898,9 @@ struct ieee80211_ops {
+       void (*sta_set_decap_offload)(struct ieee80211_hw *hw,
+                                     struct ieee80211_vif *vif,
+                                     struct ieee80211_sta *sta, bool enabled);
++      void (*sta_set_airtime_weight)(struct ieee80211_hw *hw,
++                                     struct ieee80211_vif *vif,
++                                     struct ieee80211_sta *sta, u16 weight);
+       void (*add_twt_setup)(struct ieee80211_hw *hw,
+                             struct ieee80211_sta *sta,
+                             struct ieee80211_twt_setup *twt);
+--- a/net/mac80211/cfg.c
++++ b/net/mac80211/cfg.c
+@@ -2298,8 +2298,12 @@ static int sta_apply_parameters(struct i
+       if (ieee80211_vif_is_mesh(&sdata->vif))
+               sta_apply_mesh_params(local, sta, params);
+ 
+-      if (params->airtime_weight)
++      if (params->airtime_weight) {
+               sta->airtime_weight = params->airtime_weight;
++              if (sta->uploaded)
++                      drv_sta_set_airtime_weight(local, sdata, &sta->sta,
++                                                 sta->airtime_weight);
++      }
+ 
+       /* set the STA state after all sta info from usermode has been set */
+       if (test_sta_flag(sta, WLAN_STA_TDLS_PEER) ||
+--- a/net/mac80211/driver-ops.c
++++ b/net/mac80211/driver-ops.c
+@@ -157,6 +157,10 @@ int drv_sta_state(struct ieee80211_local
+                       sta->uploaded = true;
+                       if (rcu_access_pointer(sta->sta.rates))
+                               drv_sta_rate_tbl_update(local, sdata, &sta->sta);
++                      if (sta->airtime_weight != IEEE80211_DEFAULT_AIRTIME_WEIGHT)
++                              drv_sta_set_airtime_weight(local, sdata,
++                                                         &sta->sta,
++                                                         sta->airtime_weight);
+               }
+       } else if (old_state == IEEE80211_STA_ASSOC &&
+                  new_state == IEEE80211_STA_AUTH) {
+--- a/net/mac80211/driver-ops.h
++++ b/net/mac80211/driver-ops.h
+@@ -1633,6 +1633,25 @@ static inline void drv_sta_set_decap_off
+       trace_drv_return_void(local);
+ }
+ 
++static inline void drv_sta_set_airtime_weight(struct ieee80211_local *local,
++                                            struct ieee80211_sub_if_data *sdata,
++                                            struct ieee80211_sta *sta,
++                                            u16 weight)
++{
++      sdata = get_bss_sdata(sdata);
++
++      might_sleep();
++      lockdep_assert_wiphy(local->hw.wiphy);
++      if (!check_sdata_in_driver(sdata))
++              return;
++
++      trace_drv_sta_set_airtime_weight(local, sdata, sta, weight);
++      if (local->ops->sta_set_airtime_weight)
++              local->ops->sta_set_airtime_weight(&local->hw, &sdata->vif, sta,
++                                                 weight);
++      trace_drv_return_void(local);
++}
++
+ static inline void drv_add_twt_setup(struct ieee80211_local *local,
+                                    struct ieee80211_sub_if_data *sdata,
+                                    struct ieee80211_sta *sta,
+--- a/net/mac80211/sta_info.c
++++ b/net/mac80211/sta_info.c
+@@ -832,8 +832,13 @@ static int sta_info_insert_drv_state(str
+                * Drivers using legacy sta_add/sta_remove callbacks only
+                * get uploaded set to true after sta_add is called.
+                */
+-              if (!local->ops->sta_add)
++              if (!local->ops->sta_add) {
+                       sta->uploaded = true;
++                      if (sta->airtime_weight != IEEE80211_DEFAULT_AIRTIME_WEIGHT)
++                              drv_sta_set_airtime_weight(local, sdata,
++                                                         &sta->sta,
++                                                         sta->airtime_weight);
++              }
+               return 0;
+       }
+ 
+--- a/net/mac80211/trace.h
++++ b/net/mac80211/trace.h
+@@ -2481,6 +2481,33 @@ DEFINE_EVENT(sta_flag_evt, drv_sta_set_d
+       TP_ARGS(local, sdata, sta, enabled)
+ );
+ 
++TRACE_EVENT(drv_sta_set_airtime_weight,
++      TP_PROTO(struct ieee80211_local *local,
++               struct ieee80211_sub_if_data *sdata,
++               struct ieee80211_sta *sta, u16 weight),
++
++      TP_ARGS(local, sdata, sta, weight),
++
++      TP_STRUCT__entry(
++              LOCAL_ENTRY
++              VIF_ENTRY
++              STA_ENTRY
++              __field(u16, weight)
++      ),
++
++      TP_fast_assign(
++              LOCAL_ASSIGN;
++              VIF_ASSIGN;
++              STA_ASSIGN;
++              __entry->weight = weight;
++      ),
++
++      TP_printk(
++              LOCAL_PR_FMT  VIF_PR_FMT  STA_PR_FMT " weight:%u",
++              LOCAL_PR_ARG, VIF_PR_ARG, STA_PR_ARG, __entry->weight
++      )
++);
++
+ TRACE_EVENT(drv_add_twt_setup,
+       TP_PROTO(struct ieee80211_local *local,
+                struct ieee80211_sta *sta,