rtw89: coex: Add MAC API to get BT polluted counter

Add function to get and parse BT polluted counter.
When WLAN Tx was dropped by BT, the packet will be marked as BT polluted.
Signed-off-by: Ching-Te Ku <ku920601@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/20211209083229.10815-4-pkshih@realtek.com

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

@@ -1126,6 +1126,9 @@ static u32 _chk_btc_report(struct rtw89_dev *rtwdev,
 		wl->ver_info.fw_coex = prpt->wl_fw_coex_ver;
 		wl->ver_info.fw = prpt->wl_fw_ver;
 		dm->wl_fw_cx_offload = !!(prpt->wl_fw_cx_offload);
+
+		btc->cx.cnt_bt[BTC_BCNT_POLUT] =
+			rtw89_mac_get_plt_cnt(rtwdev, RTW89_MAC_0);
 	}
 
 	if (rpt_type >= BTC_RPT_TYPE_BT_VER &&
@@ -4798,7 +4801,6 @@ static void _show_bt_info(struct rtw89_dev *rtwdev, struct seq_file *m)
 	struct rtw89_btc_module *module = &btc->mdinfo;
 	struct rtw89_btc_bt_link_info *bt_linfo = &bt->link_info;
 	u8 *afh = bt_linfo->afh_map;
-	u16 polt_cnt = 0;
 
 	if (!(btc->dm.coex_info_map & BTC_COEX_INFO_BT))
 		return;
@@ -4884,7 +4886,7 @@ static void _show_bt_info(struct rtw89_dev *rtwdev, struct seq_file *m)
 		   " %-15s : Hi-rx = %d, Hi-tx = %d, Lo-rx = %d, Lo-tx = %d (bt_polut_wl_tx = %d)\n",
 		   "[trx_req_cnt]", cx->cnt_bt[BTC_BCNT_HIPRI_RX],
 		   cx->cnt_bt[BTC_BCNT_HIPRI_TX], cx->cnt_bt[BTC_BCNT_LOPRI_RX],
-		   cx->cnt_bt[BTC_BCNT_LOPRI_TX], polt_cnt);
+		   cx->cnt_bt[BTC_BCNT_LOPRI_TX], cx->cnt_bt[BTC_BCNT_POLUT]);
 }
 
 #define CASE_BTC_RSN_STR(e) case BTC_RSN_ ## e: return #e

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

@@ -805,6 +805,7 @@ enum rtw89_btc_bt_state_cnt {
 	BTC_BCNT_HIPRI_RX,
 	BTC_BCNT_LOPRI_TX,
 	BTC_BCNT_LOPRI_RX,
+	BTC_BCNT_POLUT,
 	BTC_BCNT_RATECHG,
 	BTC_BCNT_NUM
 };

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

@@ -3450,6 +3450,18 @@ bool rtw89_mac_get_ctrl_path(struct rtw89_dev *rtwdev)
 	return FIELD_GET(B_AX_LTE_MUX_CTRL_PATH >> 24, val);
 }
 
+u16 rtw89_mac_get_plt_cnt(struct rtw89_dev *rtwdev, u8 band)
+{
+	u32 reg;
+	u16 cnt;
+
+	reg = rtw89_mac_reg_by_idx(R_AX_BT_PLT, band);
+	cnt = rtw89_read32_mask(rtwdev, reg, B_AX_BT_PLT_PKT_CNT_MASK);
+	rtw89_write16_set(rtwdev, reg, B_AX_BT_PLT_RST);
+
+	return cnt;
+}
+
 static void rtw89_mac_bfee_ctrl(struct rtw89_dev *rtwdev, u8 mac_idx, bool en)
 {
 	u32 reg;

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

@@ -788,6 +788,7 @@ int rtw89_mac_coex_init(struct rtw89_dev *rtwdev, const struct rtw89_mac_ax_coex
 int rtw89_mac_cfg_gnt(struct rtw89_dev *rtwdev,
 		      const struct rtw89_mac_ax_coex_gnt *gnt_cfg);
 int rtw89_mac_cfg_plt(struct rtw89_dev *rtwdev, struct rtw89_mac_ax_plt *plt);
+u16 rtw89_mac_get_plt_cnt(struct rtw89_dev *rtwdev, u8 band);
 void rtw89_mac_cfg_sb(struct rtw89_dev *rtwdev, u32 val);
 u32 rtw89_mac_get_sb(struct rtw89_dev *rtwdev);
 bool rtw89_mac_get_ctrl_path(struct rtw89_dev *rtwdev);