rtw88: coex: add feature to enhance HID coexistence performance

Add toggle table related function to enhance WL throughput when WL coexist
with 4/18 HID.
The toggle table feature will toggle WL/BT priority table during WL slot,
it can decrease the impact from HID's frequently packets and prevent HID
lag.
Signed-off-by: Ching-Te Ku <ku920601@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20201126021059.11981-11-pkshih@realtek.com

drivers/net/wireless/realtek/rtw88/coex.c

@@ -937,6 +937,69 @@ static void rtw_coex_set_gnt_wl(struct rtw_dev *rtwdev, u8 state)
 	rtw_coex_write_indirect_reg(rtwdev, LTE_COEX_CTRL, 0x0300, state);
 }
 
+static void rtw_btc_wltoggle_table_a(struct rtw_dev *rtwdev, bool force,
+				     u8 table_case)
+{
+	struct rtw_chip_info *chip = rtwdev->chip;
+	struct rtw_efuse *efuse = &rtwdev->efuse;
+	u8 h2c_para[6] = {0};
+	u32 table_wl = 0x5a5a5a5a;
+
+	h2c_para[0] = COEX_H2C69_TOGGLE_TABLE_A;
+	/* no definition */
+	h2c_para[1] = 0x1;
+
+	if (efuse->share_ant) {
+		if (table_case < chip->table_sant_num)
+			table_wl = chip->table_sant[table_case].wl;
+	} else {
+		if (table_case < chip->table_nsant_num)
+			table_wl = chip->table_nsant[table_case].wl;
+	}
+
+	/* tell WL FW WL slot toggle table-A*/
+	h2c_para[2] = (u8)u32_get_bits(table_wl, GENMASK(7, 0));
+	h2c_para[3] = (u8)u32_get_bits(table_wl, GENMASK(15, 8));
+	h2c_para[4] = (u8)u32_get_bits(table_wl, GENMASK(23, 16));
+	h2c_para[5] = (u8)u32_get_bits(table_wl, GENMASK(31, 24));
+
+	rtw_fw_bt_wifi_control(rtwdev, h2c_para[0], &h2c_para[1]);
+
+	rtw_dbg(rtwdev, RTW_DBG_COEX,
+		"[BTCoex], %s(): H2C = [%02x %02x %02x %02x %02x %02x]\n",
+		__func__, h2c_para[0], h2c_para[1], h2c_para[2],
+		h2c_para[3], h2c_para[4], h2c_para[5]);
+}
+
+#define COEX_WL_SLOT_TOGLLE 0x5a5a5aaa
+static void rtw_btc_wltoggle_table_b(struct rtw_dev *rtwdev, bool force,
+				     u8 interval, u32 table)
+{
+	struct rtw_coex *coex = &rtwdev->coex;
+	struct rtw_coex_stat *coex_stat = &coex->stat;
+	u8 cur_h2c_para[6] = {0};
+	u8 i;
+
+	cur_h2c_para[0] = COEX_H2C69_TOGGLE_TABLE_B;
+	cur_h2c_para[1] = interval;
+	cur_h2c_para[2] = (u8)u32_get_bits(table, GENMASK(7, 0));
+	cur_h2c_para[3] = (u8)u32_get_bits(table, GENMASK(15, 8));
+	cur_h2c_para[4] = (u8)u32_get_bits(table, GENMASK(23, 16));
+	cur_h2c_para[5] = (u8)u32_get_bits(table, GENMASK(31, 24));
+
+	coex_stat->wl_toggle_interval = interval;
+
+	for (i = 0; i <= 5; i++)
+		coex_stat->wl_toggle_para[i] = cur_h2c_para[i];
+
+	rtw_fw_bt_wifi_control(rtwdev, cur_h2c_para[0], &cur_h2c_para[1]);
+
+	rtw_dbg(rtwdev, RTW_DBG_COEX,
+		"[BTCoex], %s(): H2C = [%02x %02x %02x %02x %02x %02x]\n",
+		__func__, cur_h2c_para[0], cur_h2c_para[1], cur_h2c_para[2],
+		cur_h2c_para[3], cur_h2c_para[4], cur_h2c_para[5]);
+}
+
 static void rtw_coex_set_table(struct rtw_dev *rtwdev, bool force, u32 table0,
 			       u32 table1)
 {
@@ -965,6 +1028,7 @@ static void rtw_coex_table(struct rtw_dev *rtwdev, bool force, u8 type)
 	struct rtw_coex_dm *coex_dm = &coex->dm;
 	struct rtw_chip_info *chip = rtwdev->chip;
 	struct rtw_efuse *efuse = &rtwdev->efuse;
+	struct rtw_coex_stat *coex_stat = &coex->stat;
 
 	coex_dm->cur_table = type;
 
@@ -982,6 +1046,8 @@ static void rtw_coex_table(struct rtw_dev *rtwdev, bool force, u8 type)
 					   chip->table_nsant[type].bt,
 					   chip->table_nsant[type].wl);
 	}
+	if (coex_stat->wl_slot_toggle_change)
+		rtw_btc_wltoggle_table_a(rtwdev, true, type);
 }
 
 static void rtw_coex_ignore_wlan_act(struct rtw_dev *rtwdev, bool enable)
@@ -1031,6 +1097,7 @@ static void rtw_coex_set_tdma(struct rtw_dev *rtwdev, u8 byte1, u8 byte2,
 	struct rtw_coex *coex = &rtwdev->coex;
 	struct rtw_coex_dm *coex_dm = &coex->dm;
 	struct rtw_chip_info *chip = rtwdev->chip;
+	struct rtw_coex_stat *coex_stat = &coex->stat;
 	u8 ps_type = COEX_PS_WIFI_NATIVE;
 	bool ap_enable = false;
 
@@ -1072,6 +1139,14 @@ static void rtw_coex_set_tdma(struct rtw_dev *rtwdev, u8 byte1, u8 byte2,
 	coex_dm->ps_tdma_para[4] = byte5;
 
 	rtw_fw_coex_tdma_type(rtwdev, byte1, byte2, byte3, byte4, byte5);
+
+	if (byte1 & BIT(2)) {
+		coex_stat->wl_slot_toggle = true;
+		coex_stat->wl_slot_toggle_change = false;
+	} else {
+		coex_stat->wl_slot_toggle_change = coex_stat->wl_slot_toggle;
+		coex_stat->wl_slot_toggle = false;
+	}
 }
 
 static void rtw_coex_tdma(struct rtw_dev *rtwdev, bool force, u32 tcase)
@@ -1776,7 +1851,7 @@ static void rtw_coex_action_bt_hid(struct rtw_dev *rtwdev)
 	struct rtw_chip_info *chip = rtwdev->chip;
 	u8 table_case, tdma_case;
 	u32 slot_type = 0;
-	bool bt_multi_link_remain = false;
+	bool bt_multi_link_remain = false, is_toggle_table = false;
 
 	rtw_dbg(rtwdev, RTW_DBG_COEX, "[BTCoex], %s()\n", __func__);
 	rtw_coex_set_ant_path(rtwdev, false, COEX_SET_ANT_2G);
@@ -1809,6 +1884,7 @@ static void rtw_coex_action_bt_hid(struct rtw_dev *rtwdev)
 				tdma_case = 18;
 			} else if (coex_stat->bt_418_hid_exist &&
 				   coex_stat->wl_gl_busy) {
+				is_toggle_table = true;
 				slot_type = TDMA_4SLOT;
 				table_case = 9;
 				tdma_case = 24;
@@ -1842,6 +1918,11 @@ static void rtw_coex_action_bt_hid(struct rtw_dev *rtwdev)
 	}
 
 	rtw_coex_table(rtwdev, false, table_case);
+	if (is_toggle_table) {
+		rtw_btc_wltoggle_table_a(rtwdev, true, table_case);
+		rtw_btc_wltoggle_table_b(rtwdev, false, 1, COEX_WL_SLOT_TOGLLE);
+	}
+
 	rtw_coex_tdma(rtwdev, false, tdma_case | slot_type);
 }
 
@@ -1970,8 +2051,9 @@ static void rtw_coex_action_bt_a2dp_hid(struct rtw_dev *rtwdev)
 	struct rtw_coex_dm *coex_dm = &coex->dm;
 	struct rtw_efuse *efuse = &rtwdev->efuse;
 	struct rtw_chip_info *chip = rtwdev->chip;
-	u8 table_case, tdma_case;
+	u8 table_case, tdma_case, interval;
 	u32 slot_type = 0;
+	bool is_toggle_table = false;
 
 	slot_type = TDMA_4SLOT;
 
@@ -1981,15 +2063,19 @@ static void rtw_coex_action_bt_a2dp_hid(struct rtw_dev *rtwdev)
 
 	if (efuse->share_ant) {
 		/* Shared-Ant */
-		if (coex_stat->bt_ble_exist)
+		if (coex_stat->bt_ble_exist) {
 			table_case = 26; /* for RCU */
-		else
+		} else if (coex_stat->bt_418_hid_exist) {
+			table_case = 9;
+			interval = 1;
+		} else {
 			table_case = 9;
+		}
 
 		if (coex_stat->wl_connecting || !coex_stat->wl_gl_busy) {
 			tdma_case = 14;
-		} else if (coex_stat->bt_418_hid_exist ||
-			   coex_stat->bt_ble_hid_exist) {
+		} else if (coex_stat->bt_418_hid_exist) {
+			is_toggle_table = true;
 			tdma_case = 23;
 		} else {
 			tdma_case = 13;
@@ -2008,6 +2094,10 @@ static void rtw_coex_action_bt_a2dp_hid(struct rtw_dev *rtwdev)
 	}
 
 	rtw_coex_table(rtwdev, false, table_case);
+	if (is_toggle_table) {
+		rtw_btc_wltoggle_table_a(rtwdev, true, table_case);
+		rtw_btc_wltoggle_table_b(rtwdev, false, interval, COEX_WL_SLOT_TOGLLE);
+	}
 	rtw_coex_tdma(rtwdev, false, tdma_case | slot_type);
 }
 

drivers/net/wireless/realtek/rtw88/coex.h

@@ -25,6 +25,9 @@
 #define PARA1_H2C69_TBTT_TIMES	GENMASK(5, 0)
 #define PARA1_H2C69_TBTT_DIV100	BIT(7)
 
+#define COEX_H2C69_TOGGLE_TABLE_A 0xd
+#define COEX_H2C69_TOGGLE_TABLE_B 0x7
+
 #define TDMA_4SLOT	BIT(8)
 
 #define TDMA_TIMER_TYPE_2SLOT 0

drivers/net/wireless/realtek/rtw88/main.h

@@ -1335,6 +1335,8 @@ struct rtw_coex_stat {
 	bool wl_cck_lock_pre;
 	bool wl_cck_lock_ever;
 	bool wl_connecting;
+	bool wl_slot_toggle;
+	bool wl_slot_toggle_change; /* if toggle to no-toggle */
 
 	u32 bt_supported_version;
 	u32 bt_supported_feature;
@@ -1375,6 +1377,9 @@ struct rtw_coex_stat {
 	u8 ampdu_max_time;
 	u8 wl_tput_dir;
 
+	u8 wl_toggle_para[6];
+	u8 wl_toggle_interval;
+
 	u16 score_board;
 	u16 retry_limit;