wifi: mt76: mt792x: add struct mt792x_chanctx

We are introducing a new structure, mt792x_chanctx, to quickly identify
the linked BSS it is working on. This eliminates the need to search in
mt7921_ctx_iter() or mt7925_ctx_iter() when the channel context changes.
Co-developed-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: Deren Wu <deren.wu@mediatek.com>
Link: https://patch.msgid.link/20240613030241.5771-4-sean.wang@kernel.orgSigned-off-by: Felix Fietkau <nbd@nbd.name>

drivers/net/wireless/mediatek/mt76/mt7921/main.c

@@ -1346,32 +1346,27 @@ mt7921_remove_chanctx(struct ieee80211_hw *hw,
 {
 }
 
-static void mt7921_ctx_iter(void *priv, u8 *mac,
-			    struct ieee80211_vif *vif)
-{
-	struct mt792x_vif *mvif = (struct mt792x_vif *)vif->drv_priv;
-	struct ieee80211_chanctx_conf *ctx = priv;
-
-	if (ctx != mvif->bss_conf.mt76.ctx)
-		return;
-
-	if (vif->type == NL80211_IFTYPE_MONITOR)
-		mt7921_mcu_config_sniffer(mvif, ctx);
-	else
-		mt76_connac_mcu_uni_set_chctx(mvif->phy->mt76, &mvif->bss_conf.mt76, ctx);
-}
-
 static void
 mt7921_change_chanctx(struct ieee80211_hw *hw,
 		      struct ieee80211_chanctx_conf *ctx,
 		      u32 changed)
 {
+	struct mt792x_chanctx *mctx = (struct mt792x_chanctx *)ctx->drv_priv;
 	struct mt792x_phy *phy = mt792x_hw_phy(hw);
+	struct ieee80211_vif *vif;
+	struct mt792x_vif *mvif;
+
+	if (!mctx->bss_conf)
+		return;
+
+	mvif = container_of(mctx->bss_conf, struct mt792x_vif, bss_conf);
+	vif = container_of((void *)mvif, struct ieee80211_vif, drv_priv);
 
 	mt792x_mutex_acquire(phy->dev);
-	ieee80211_iterate_active_interfaces(phy->mt76->hw,
-					    IEEE80211_IFACE_ITER_ACTIVE,
-					    mt7921_ctx_iter, ctx);
+	if (vif->type == NL80211_IFTYPE_MONITOR)
+		mt7921_mcu_config_sniffer(mvif, ctx);
+	else
+		mt76_connac_mcu_uni_set_chctx(mvif->phy->mt76, &mvif->bss_conf.mt76, ctx);
 	mt792x_mutex_release(phy->dev);
 }
 

drivers/net/wireless/mediatek/mt76/mt7925/main.c

@@ -1354,34 +1354,29 @@ mt7925_remove_chanctx(struct ieee80211_hw *hw,
 {
 }
 
-static void mt7925_ctx_iter(void *priv, u8 *mac,
-			    struct ieee80211_vif *vif)
+static void
+mt7925_change_chanctx(struct ieee80211_hw *hw,
+		      struct ieee80211_chanctx_conf *ctx,
+		      u32 changed)
 {
-	struct mt792x_vif *mvif = (struct mt792x_vif *)vif->drv_priv;
-	struct ieee80211_chanctx_conf *ctx = priv;
+	struct mt792x_chanctx *mctx = (struct mt792x_chanctx *)ctx->drv_priv;
+	struct mt792x_phy *phy = mt792x_hw_phy(hw);
+	struct ieee80211_vif *vif;
+	struct mt792x_vif *mvif;
 
-	if (ctx != mvif->bss_conf.mt76.ctx)
+	if (!mctx->bss_conf)
 		return;
 
+	mvif = container_of(mctx->bss_conf, struct mt792x_vif, bss_conf);
+	vif = container_of((void *)mvif, struct ieee80211_vif, drv_priv);
+
+	mt792x_mutex_acquire(phy->dev);
 	if (vif->type == NL80211_IFTYPE_MONITOR) {
 		mt7925_mcu_set_sniffer(mvif->phy->dev, vif, true);
 		mt7925_mcu_config_sniffer(mvif, ctx);
 	} else {
 		mt7925_mcu_set_chctx(mvif->phy->mt76, &mvif->bss_conf.mt76, ctx);
 	}
-}
-
-static void
-mt7925_change_chanctx(struct ieee80211_hw *hw,
-		      struct ieee80211_chanctx_conf *ctx,
-		      u32 changed)
-{
-	struct mt792x_phy *phy = mt792x_hw_phy(hw);
-
-	mt792x_mutex_acquire(phy->dev);
-	ieee80211_iterate_active_interfaces(phy->mt76->hw,
-					    IEEE80211_IFACE_ITER_ACTIVE,
-					    mt7925_ctx_iter, ctx);
 	mt792x_mutex_release(phy->dev);
 }
 

drivers/net/wireless/mediatek/mt76/mt792x.h

@@ -102,6 +102,10 @@ struct mt792x_sta {
 
 DECLARE_EWMA(rssi, 10, 8);
 
+struct mt792x_chanctx {
+	struct mt792x_bss_conf *bss_conf;
+};
+
 struct mt792x_bss_conf {
 	struct mt76_vif mt76; /* must be first */
 	struct ewma_rssi rssi;

drivers/net/wireless/mediatek/mt76/mt792x_core.c

@@ -261,11 +261,13 @@ int mt792x_assign_vif_chanctx(struct ieee80211_hw *hw,
 			      struct ieee80211_bss_conf *link_conf,
 			      struct ieee80211_chanctx_conf *ctx)
 {
+	struct mt792x_chanctx *mctx = (struct mt792x_chanctx *)ctx->drv_priv;
 	struct mt792x_vif *mvif = (struct mt792x_vif *)vif->drv_priv;
 	struct mt792x_dev *dev = mt792x_hw_dev(hw);
 
 	mutex_lock(&dev->mt76.mutex);
 	mvif->bss_conf.mt76.ctx = ctx;
+	mctx->bss_conf = &mvif->bss_conf;
 	mutex_unlock(&dev->mt76.mutex);
 
 	return 0;
@@ -277,10 +279,12 @@ void mt792x_unassign_vif_chanctx(struct ieee80211_hw *hw,
 				 struct ieee80211_bss_conf *link_conf,
 				 struct ieee80211_chanctx_conf *ctx)
 {
+	struct mt792x_chanctx *mctx = (struct mt792x_chanctx *)ctx->drv_priv;
 	struct mt792x_vif *mvif = (struct mt792x_vif *)vif->drv_priv;
 	struct mt792x_dev *dev = mt792x_hw_dev(hw);
 
 	mutex_lock(&dev->mt76.mutex);
+	mctx->bss_conf = NULL;
 	mvif->bss_conf.mt76.ctx = NULL;
 	mutex_unlock(&dev->mt76.mutex);
 }
@@ -556,6 +560,7 @@ int mt792x_init_wiphy(struct ieee80211_hw *hw)
 
 	hw->sta_data_size = sizeof(struct mt792x_sta);
 	hw->vif_data_size = sizeof(struct mt792x_vif);
+	hw->chanctx_data_size = sizeof(struct mt792x_chanctx);
 
 	if (dev->fw_features & MT792x_FW_CAP_CNM) {
 		wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;