wifi: rtw89: support P2P

To support P2P in driver, we set P2P interface mode to the wiphy
allocated for 802.11 PHY and add a change interface function to
switch the interface type to P2P.
Signed-off-by: Po Hao Huang <phhuang@realtek.com>
Signed-off-by: Dian-Syuan Yang <dian_syuan0116@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20220922010435.12167-2-pkshih@realtek.com

drivers/net/wireless/realtek/rtw89/core.c

@@ -3224,7 +3224,10 @@ static int rtw89_core_register_hw(struct rtw89_dev *rtwdev)
 	ieee80211_hw_set(hw, SUPPORTS_MULTI_BSSID);
 
 	hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
-				     BIT(NL80211_IFTYPE_AP);
+				     BIT(NL80211_IFTYPE_AP) |
+				     BIT(NL80211_IFTYPE_P2P_CLIENT) |
+				     BIT(NL80211_IFTYPE_P2P_GO);
+
 	hw->wiphy->available_antennas_tx = BIT(rtwdev->chip->rf_path_num) - 1;
 	hw->wiphy->available_antennas_rx = BIT(rtwdev->chip->rf_path_num) - 1;
 

drivers/net/wireless/realtek/rtw89/debug.h

@@ -25,6 +25,7 @@ enum rtw89_debug_mask {
 	RTW89_DBG_BF = BIT(14),
 	RTW89_DBG_HW_SCAN = BIT(15),
 	RTW89_DBG_SAR = BIT(16),
+	RTW89_DBG_STATE = BIT(17),
 
 	RTW89_DBG_UNEXP = BIT(31),
 };

drivers/net/wireless/realtek/rtw89/mac80211.c

@@ -109,6 +109,9 @@ static int rtw89_ops_add_interface(struct ieee80211_hw *hw,
 	struct rtw89_vif *rtwvif = (struct rtw89_vif *)vif->drv_priv;
 	int ret = 0;
 
+	rtw89_debug(rtwdev, RTW89_DBG_STATE, "add vif %pM type %d, p2p %d\n",
+		    vif->addr, vif->type, vif->p2p);
+
 	mutex_lock(&rtwdev->mutex);
 	rtwvif->rtwdev = rtwdev;
 	list_add_tail(&rtwvif->list, &rtwdev->rtwvifs_list);
@@ -151,6 +154,9 @@ static void rtw89_ops_remove_interface(struct ieee80211_hw *hw,
 	struct rtw89_dev *rtwdev = hw->priv;
 	struct rtw89_vif *rtwvif = (struct rtw89_vif *)vif->drv_priv;
 
+	rtw89_debug(rtwdev, RTW89_DBG_STATE, "remove vif %pM type %d p2p %d\n",
+		    vif->addr, vif->type, vif->p2p);
+
 	cancel_work_sync(&rtwvif->update_beacon_work);
 
 	mutex_lock(&rtwdev->mutex);
@@ -162,6 +168,23 @@ static void rtw89_ops_remove_interface(struct ieee80211_hw *hw,
 	mutex_unlock(&rtwdev->mutex);
 }
 
+static int rtw89_ops_change_interface(struct ieee80211_hw *hw,
+				      struct ieee80211_vif *vif,
+				      enum nl80211_iftype type, bool p2p)
+{
+	struct rtw89_dev *rtwdev = hw->priv;
+
+	rtw89_debug(rtwdev, RTW89_DBG_STATE, "change vif %pM (%d)->(%d), p2p (%d)->(%d)\n",
+		    vif->addr, vif->type, type, vif->p2p, p2p);
+
+	rtw89_ops_remove_interface(hw, vif);
+
+	vif->type = type;
+	vif->p2p = p2p;
+
+	return rtw89_ops_add_interface(hw, vif);
+}
+
 static void rtw89_ops_configure_filter(struct ieee80211_hw *hw,
 				       unsigned int changed_flags,
 				       unsigned int *new_flags,
@@ -896,6 +919,7 @@ const struct ieee80211_ops rtw89_ops = {
 	.stop			= rtw89_ops_stop,
 	.config			= rtw89_ops_config,
 	.add_interface		= rtw89_ops_add_interface,
+	.change_interface       = rtw89_ops_change_interface,
 	.remove_interface	= rtw89_ops_remove_interface,
 	.configure_filter	= rtw89_ops_configure_filter,
 	.bss_info_changed	= rtw89_ops_bss_info_changed,