wifi: mac80211: convert A-MPDU work to wiphy work

Convert the A-MPDU work to wiphy work so it holds the
wiphy mutex and we can later guarantee that to drivers.
It might seem that we could run these concurrently for
different stations, but they're all on the ordered
mac80211 workqueue, so this shouldn't matter for that.
Reviewed-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

net/mac80211/agg-rx.c

@@ -9,7 +9,7 @@
  * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
  * Copyright 2007-2010, Intel Corporation
  * Copyright(c) 2015-2017 Intel Deutschland GmbH
- * Copyright (C) 2018-2022 Intel Corporation
+ * Copyright (C) 2018-2023 Intel Corporation
  */
 
 /**
@@ -140,7 +140,7 @@ void ieee80211_stop_rx_ba_session(struct ieee80211_vif *vif, u16 ba_rx_bitmap,
 		if (ba_rx_bitmap & BIT(i))
 			set_bit(i, sta->ampdu_mlme.tid_rx_stop_requested);
 
-	ieee80211_queue_work(&sta->local->hw, &sta->ampdu_mlme.work);
+	wiphy_work_queue(sta->local->hw.wiphy, &sta->ampdu_mlme.work);
 	rcu_read_unlock();
 }
 EXPORT_SYMBOL(ieee80211_stop_rx_ba_session);
@@ -166,7 +166,7 @@ static void sta_rx_agg_session_timer_expired(struct timer_list *t)
 	       sta->sta.addr, tid);
 
 	set_bit(tid, sta->ampdu_mlme.tid_rx_timer_expired);
-	ieee80211_queue_work(&sta->local->hw, &sta->ampdu_mlme.work);
+	wiphy_work_queue(sta->local->hw.wiphy, &sta->ampdu_mlme.work);
 }
 
 static void sta_rx_agg_reorder_timer_expired(struct timer_list *t)
@@ -507,7 +507,6 @@ void ieee80211_manage_rx_ba_offl(struct ieee80211_vif *vif,
 				 const u8 *addr, unsigned int tid)
 {
 	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
-	struct ieee80211_local *local = sdata->local;
 	struct sta_info *sta;
 
 	rcu_read_lock();
@@ -516,7 +515,7 @@ void ieee80211_manage_rx_ba_offl(struct ieee80211_vif *vif,
 		goto unlock;
 
 	set_bit(tid, sta->ampdu_mlme.tid_rx_manage_offl);
-	ieee80211_queue_work(&local->hw, &sta->ampdu_mlme.work);
+	wiphy_work_queue(sta->local->hw.wiphy, &sta->ampdu_mlme.work);
  unlock:
 	rcu_read_unlock();
 }
@@ -526,7 +525,6 @@ void ieee80211_rx_ba_timer_expired(struct ieee80211_vif *vif,
 				   const u8 *addr, unsigned int tid)
 {
 	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
-	struct ieee80211_local *local = sdata->local;
 	struct sta_info *sta;
 
 	rcu_read_lock();
@@ -535,7 +533,7 @@ void ieee80211_rx_ba_timer_expired(struct ieee80211_vif *vif,
 		goto unlock;
 
 	set_bit(tid, sta->ampdu_mlme.tid_rx_timer_expired);
-	ieee80211_queue_work(&local->hw, &sta->ampdu_mlme.work);
+	wiphy_work_queue(sta->local->hw.wiphy, &sta->ampdu_mlme.work);
 
  unlock:
 	rcu_read_unlock();

net/mac80211/agg-tx.c

@@ -743,7 +743,7 @@ int ieee80211_start_tx_ba_session(struct ieee80211_sta *pubsta, u16 tid,
 	 */
 	sta->ampdu_mlme.tid_start_tx[tid] = tid_tx;
 
-	ieee80211_queue_work(&local->hw, &sta->ampdu_mlme.work);
+	wiphy_work_queue(local->hw.wiphy, &sta->ampdu_mlme.work);
 
 	/* this flow continues off the work */
  err_unlock_sta:
@@ -862,7 +862,7 @@ void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_vif *vif,
 		goto out;
 
 	set_bit(HT_AGG_STATE_START_CB, &tid_tx->state);
-	ieee80211_queue_work(&local->hw, &sta->ampdu_mlme.work);
+	wiphy_work_queue(local->hw.wiphy, &sta->ampdu_mlme.work);
  out:
 	rcu_read_unlock();
 }
@@ -916,7 +916,7 @@ int ieee80211_stop_tx_ba_session(struct ieee80211_sta *pubsta, u16 tid)
 	}
 
 	set_bit(HT_AGG_STATE_WANT_STOP, &tid_tx->state);
-	ieee80211_queue_work(&local->hw, &sta->ampdu_mlme.work);
+	wiphy_work_queue(local->hw.wiphy, &sta->ampdu_mlme.work);
 
  unlock:
 	spin_unlock_bh(&sta->lock);
@@ -976,7 +976,7 @@ void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_vif *vif,
 		goto out;
 
 	set_bit(HT_AGG_STATE_STOP_CB, &tid_tx->state);
-	ieee80211_queue_work(&local->hw, &sta->ampdu_mlme.work);
+	wiphy_work_queue(local->hw.wiphy, &sta->ampdu_mlme.work);
  out:
 	rcu_read_unlock();
 }

net/mac80211/ht.c

@@ -333,7 +333,7 @@ void ieee80211_sta_tear_down_BA_sessions(struct sta_info *sta,
 	 * the BA session, so handle it to properly clean tid_tx data.
 	 */
 	if(reason == AGG_STOP_DESTROY_STA) {
-		cancel_work_sync(&sta->ampdu_mlme.work);
+		wiphy_work_cancel(sta->local->hw.wiphy, &sta->ampdu_mlme.work);
 
 		mutex_lock(&sta->ampdu_mlme.mtx);
 		for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
@@ -350,7 +350,7 @@ void ieee80211_sta_tear_down_BA_sessions(struct sta_info *sta,
 	}
 }
 
-void ieee80211_ba_session_work(struct work_struct *work)
+void ieee80211_ba_session_work(struct wiphy *wiphy, struct wiphy_work *work)
 {
 	struct sta_info *sta =
 		container_of(work, struct sta_info, ampdu_mlme.work);
@@ -416,7 +416,7 @@ void ieee80211_ba_session_work(struct work_struct *work)
 
 				mutex_unlock(&sta->ampdu_mlme.mtx);
 
-				ieee80211_queue_work(&sdata->local->hw, work);
+				wiphy_work_queue(sdata->local->hw.wiphy, work);
 				return;
 			}
 

net/mac80211/ieee80211_i.h

@@ -2134,7 +2134,7 @@ void ieee80211_start_tx_ba_cb(struct sta_info *sta, int tid,
 			      struct tid_ampdu_tx *tid_tx);
 void ieee80211_stop_tx_ba_cb(struct sta_info *sta, int tid,
 			     struct tid_ampdu_tx *tid_tx);
-void ieee80211_ba_session_work(struct work_struct *work);
+void ieee80211_ba_session_work(struct wiphy *wiphy, struct wiphy_work *work);
 void ieee80211_tx_ba_session_handle_start(struct sta_info *sta, int tid);
 void ieee80211_release_reorder_timeout(struct sta_info *sta, int tid);
 

net/mac80211/sta_info.c

@@ -556,7 +556,7 @@ __sta_info_alloc(struct ieee80211_sub_if_data *sdata,
 	spin_lock_init(&sta->lock);
 	spin_lock_init(&sta->ps_lock);
 	INIT_WORK(&sta->drv_deliver_wk, sta_deliver_ps_frames);
-	INIT_WORK(&sta->ampdu_mlme.work, ieee80211_ba_session_work);
+	wiphy_work_init(&sta->ampdu_mlme.work, ieee80211_ba_session_work);
 	mutex_init(&sta->ampdu_mlme.mtx);
 #ifdef CONFIG_MAC80211_MESH
 	if (ieee80211_vif_is_mesh(&sdata->vif)) {

net/mac80211/sta_info.h

@@ -291,7 +291,7 @@ struct sta_ampdu_mlme {
 	unsigned long agg_session_valid[BITS_TO_LONGS(IEEE80211_NUM_TIDS)];
 	unsigned long unexpected_agg[BITS_TO_LONGS(IEEE80211_NUM_TIDS)];
 	/* tx */
-	struct work_struct work;
+	struct wiphy_work work;
 	struct tid_ampdu_tx __rcu *tid_tx[IEEE80211_NUM_TIDS];
 	struct tid_ampdu_tx *tid_start_tx[IEEE80211_NUM_TIDS];
 	unsigned long last_addba_req_time[IEEE80211_NUM_TIDS];