wifi: rtw89: add mlo_dbcc_mode for WiFi 7 chips

WiFi 7 chips can operate in various MLO applications, such as 1 link (2SS)
and 2 links (1SS + 1SS), and we should configure different PHY mode for
each of them.

For example,
 - MLO_2_PLUS_0_1RF is 1 link with 2SS rate, and enable one RF component.
 - MLO_1_PLUS_1_1RF is 2 links with 1SS rate for each, and enable one RF
   component that can support two paths.

By default, we set the mode to legacy MLO_DBCC_NOT_SUPPORT (don't support
MLO and DBCC yet), and later we will introduce logic to change the mode.
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://msgid.link/20240120003831.7014-2-pkshih@realtek.com

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

@@ -4191,6 +4191,8 @@ int rtw89_core_init(struct rtw89_dev *rtwdev)
 	rtw89_traffic_stats_init(rtwdev, &rtwdev->stats);
 
 	rtwdev->hal.rx_fltr = DEFAULT_AX_RX_FLTR;
+	rtwdev->dbcc_en = false;
+	rtwdev->mlo_dbcc_mode = MLO_DBCC_NOT_SUPPORT;
 
 	INIT_WORK(&btc->eapol_notify_work, rtw89_btc_ntfy_eapol_packet_work);
 	INIT_WORK(&btc->arp_notify_work, rtw89_btc_ntfy_arp_packet_work);

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

@@ -3243,6 +3243,20 @@ enum rtw89_dma_ch {
 	RTW89_DMA_CH_NUM = 13
 };
 
+#define MLO_MODE_FOR_BB0_BB1_RF(bb0, bb1, rf) ((rf) << 12 | (bb1) << 4 | (bb0))
+
+enum rtw89_mlo_dbcc_mode {
+	MLO_DBCC_NOT_SUPPORT = 1,
+	MLO_0_PLUS_2_1RF = MLO_MODE_FOR_BB0_BB1_RF(0, 2, 1),
+	MLO_0_PLUS_2_2RF = MLO_MODE_FOR_BB0_BB1_RF(0, 2, 2),
+	MLO_1_PLUS_1_1RF = MLO_MODE_FOR_BB0_BB1_RF(1, 1, 1),
+	MLO_1_PLUS_1_2RF = MLO_MODE_FOR_BB0_BB1_RF(1, 1, 2),
+	MLO_2_PLUS_0_1RF = MLO_MODE_FOR_BB0_BB1_RF(2, 0, 1),
+	MLO_2_PLUS_0_2RF = MLO_MODE_FOR_BB0_BB1_RF(2, 0, 2),
+	MLO_2_PLUS_2_2RF = MLO_MODE_FOR_BB0_BB1_RF(2, 2, 2),
+	DBCC_LEGACY = 0xffffffff,
+};
+
 enum rtw89_qta_mode {
 	RTW89_QTA_SCC,
 	RTW89_QTA_DLFW,
@@ -4839,6 +4853,7 @@ struct rtw89_dev {
 	const struct ieee80211_ops *ops;
 
 	bool dbcc_en;
+	enum rtw89_mlo_dbcc_mode mlo_dbcc_mode;
 	struct rtw89_hw_scan_info scan_info;
 	const struct rtw89_chip_info *chip;
 	const struct rtw89_pci_info *pci_info;
@@ -5835,6 +5850,18 @@ static inline void rtw89_core_tx_wait_complete(struct rtw89_dev *rtwdev,
 	rcu_read_unlock();
 }
 
+static inline bool rtw89_is_mlo_1_1(struct rtw89_dev *rtwdev)
+{
+	switch (rtwdev->mlo_dbcc_mode) {
+	case MLO_1_PLUS_1_1RF:
+	case MLO_1_PLUS_1_2RF:
+	case DBCC_LEGACY:
+		return true;
+	default:
+		return false;
+	}
+}
+
 int rtw89_core_tx_write(struct rtw89_dev *rtwdev, struct ieee80211_vif *vif,
 			struct ieee80211_sta *sta, struct sk_buff *skb, int *qsel);
 int rtw89_h2c_tx(struct rtw89_dev *rtwdev,