rtw89: coex: Add v1 Wi-Fi SCC coexistence policy

Because the later firmware had patched some new feature, it can control
the Wi-Fi/BT slots more efficiently. This patch enhance it for better
Wi-Fi SCC mode performance.
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/20220725023509.43114-9-pkshih@realtek.com

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

@@ -273,6 +273,21 @@ enum btc_cx_poicy_type {
 	/* TDMA off + Ext-Ctrl + pri: E2G-slot block all BT */
 	BTC_CXP_OFFE_DEF2 = (BTC_CXP_OFFE << 8) | 1,
 
+	/* TDMA off + Ext-Ctrl + pri: default */
+	BTC_CXP_OFFE_2GBWISOB = (BTC_CXP_OFFE << 8) | 2,
+
+	/* TDMA off + Ext-Ctrl + pri: E2G-slot block all BT */
+	BTC_CXP_OFFE_2GISOB = (BTC_CXP_OFFE << 8) | 3,
+
+	/* TDMA off + Ext-Ctrl + pri: E2G-slot WL > BT */
+	BTC_CXP_OFFE_2GBWMIXB = (BTC_CXP_OFFE << 8) | 4,
+
+	/* TDMA off + Ext-Ctrl + pri: E2G/EBT-slot WL > BT */
+	BTC_CXP_OFFE_WL = (BTC_CXP_OFFE << 8) | 5,
+
+	/* TDMA off + Ext-Ctrl + pri: default */
+	BTC_CXP_OFFE_2GBWMIXB2 = (BTC_CXP_OFFE << 8) | 6,
+
 	/* TDMA Fix slot-0: W1:B1 = 30:30 */
 	BTC_CXP_FIX_TD3030 = (BTC_CXP_FIX << 8) | 0,
 
@@ -440,6 +455,16 @@ enum btc_wl_link_mode {
 	BTC_WLINK_MAX
 };
 
+enum btc_wl_mrole_type {
+	BTC_WLMROLE_NONE = 0x0,
+	BTC_WLMROLE_STA_GC,
+	BTC_WLMROLE_STA_GC_NOA,
+	BTC_WLMROLE_STA_GO,
+	BTC_WLMROLE_STA_GO_NOA,
+	BTC_WLMROLE_STA_STA,
+	BTC_WLMROLE_MAX
+};
+
 enum btc_bt_hid_type {
 	BTC_HID_218 = BIT(0),
 	BTC_HID_418 = BIT(1),
@@ -1949,6 +1974,7 @@ static bool _check_freerun(struct rtw89_dev *rtwdev)
 }
 
 #define _tdma_set_flctrl(btc, flc) ({(btc)->dm.tdma.rxflctrl = flc; })
+#define _tdma_set_flctrl_role(btc, role) ({(btc)->dm.tdma.rxflctrl_role = role; })
 #define _tdma_set_tog(btc, wtg) ({(btc)->dm.tdma.wtgle_n = wtg; })
 #define _tdma_set_lek(btc, lek) ({(btc)->dm.tdma.leak_n = lek; })
 
@@ -2340,9 +2366,10 @@ void rtw89_btc_set_policy_v1(struct rtw89_dev *rtwdev, u16 policy_type)
 	struct rtw89_btc_dm *dm = &btc->dm;
 	struct rtw89_btc_fbtc_tdma *t = &dm->tdma;
 	struct rtw89_btc_fbtc_slot *s = dm->slot;
+	struct rtw89_btc_wl_role_info_v1 *wl_rinfo = &btc->cx.wl.role_info_v1;
 	struct rtw89_btc_bt_hid_desc *hid = &btc->cx.bt.link_info.hid_desc;
 	struct rtw89_btc_bt_hfp_desc *hfp = &btc->cx.bt.link_info.hfp_desc;
-	u8 type;
+	u8 type, null_role;
 	u32 tbl_w1, tbl_b1, tbl_b4;
 
 	type = FIELD_GET(BTC_CXP_MASK, policy_type);
@@ -2687,6 +2714,12 @@ void rtw89_btc_set_policy_v1(struct rtw89_dev *rtwdev, u16 policy_type)
 		break;
 	}
 
+	if (wl_rinfo->link_mode == BTC_WLINK_2G_SCC && dm->tdma.rxflctrl) {
+		null_role = FIELD_PREP(0x0f, dm->wl_scc.null_role1) |
+			    FIELD_PREP(0xf0, dm->wl_scc.null_role2);
+		_tdma_set_flctrl_role(btc, null_role);
+	}
+
 	/* enter leak_slot after each null-1 */
 	if (dm->leak_ap && dm->tdma.leak_n > 1)
 		_tdma_set_lek(btc, 1);
@@ -3663,6 +3696,68 @@ static void _action_wl_2g_scc(struct rtw89_dev *rtwdev)
 	}
 }
 
+static void _action_wl_2g_scc_v1(struct rtw89_dev *rtwdev)
+{
+	struct rtw89_btc *btc = &rtwdev->btc;
+	struct rtw89_btc_wl_info *wl = &btc->cx.wl;
+	struct rtw89_btc_bt_info *bt = &btc->cx.bt;
+	struct rtw89_btc_dm *dm = &btc->dm;
+	struct rtw89_btc_wl_role_info_v1 *wl_rinfo = &wl->role_info_v1;
+	u16 policy_type = BTC_CXP_OFF_BT;
+	u32 dur;
+
+	if (btc->mdinfo.ant.type == BTC_ANT_DEDICATED) {
+		policy_type = BTC_CXP_OFF_EQ0;
+	} else {
+		/* shared-antenna */
+		switch (wl_rinfo->mrole_type) {
+		case BTC_WLMROLE_STA_GC:
+			dm->wl_scc.null_role1 = RTW89_WIFI_ROLE_STATION;
+			dm->wl_scc.null_role2 = RTW89_WIFI_ROLE_P2P_CLIENT;
+			dm->wl_scc.ebt_null = 0; /* no ext-slot-control */
+			_action_by_bt(rtwdev);
+			return;
+		case BTC_WLMROLE_STA_STA:
+			dm->wl_scc.null_role1 = RTW89_WIFI_ROLE_STATION;
+			dm->wl_scc.null_role2 = RTW89_WIFI_ROLE_STATION;
+			dm->wl_scc.ebt_null = 0; /* no ext-slot-control */
+			_action_by_bt(rtwdev);
+			return;
+		case BTC_WLMROLE_STA_GC_NOA:
+		case BTC_WLMROLE_STA_GO:
+		case BTC_WLMROLE_STA_GO_NOA:
+			dm->wl_scc.null_role1 = RTW89_WIFI_ROLE_STATION;
+			dm->wl_scc.null_role2 = RTW89_WIFI_ROLE_NONE;
+			dur = wl_rinfo->mrole_noa_duration;
+
+			if (wl->status.map._4way) {
+				dm->wl_scc.ebt_null = 0;
+				policy_type = BTC_CXP_OFFE_WL;
+			} else if (bt->link_info.status.map.connect == 0) {
+				dm->wl_scc.ebt_null = 0;
+				policy_type = BTC_CXP_OFFE_2GISOB;
+			} else if (bt->link_info.a2dp_desc.exist &&
+				   dur < btc->bt_req_len) {
+				dm->wl_scc.ebt_null = 1; /* tx null at EBT */
+				policy_type = BTC_CXP_OFFE_2GBWMIXB2;
+			} else if (bt->link_info.a2dp_desc.exist ||
+				   bt->link_info.pan_desc.exist) {
+				dm->wl_scc.ebt_null = 1; /* tx null at EBT */
+				policy_type = BTC_CXP_OFFE_2GBWISOB;
+			} else {
+				dm->wl_scc.ebt_null = 0;
+				policy_type = BTC_CXP_OFFE_2GBWISOB;
+			}
+			break;
+		default:
+			break;
+		}
+	}
+
+	_set_ant(rtwdev, NM_EXEC, BTC_PHY_ALL, BTC_ANT_W2G);
+	_set_policy(rtwdev, policy_type, BTC_ACT_WL_2G_SCC);
+}
+
 static void _action_wl_2g_ap(struct rtw89_dev *rtwdev)
 {
 	struct rtw89_btc *btc = &rtwdev->btc;
@@ -4384,7 +4479,10 @@ void _run_coex(struct rtw89_dev *rtwdev, enum btc_reason_and_action reason)
 		_action_wl_2g_gc(rtwdev);
 		break;
 	case BTC_WLINK_2G_SCC:
-		_action_wl_2g_scc(rtwdev);
+		if (chip->chip_id == RTL8852A)
+			_action_wl_2g_scc(rtwdev);
+		else if (chip->chip_id == RTL8852C)
+			_action_wl_2g_scc_v1(rtwdev);
 		break;
 	case BTC_WLINK_2G_MCC:
 		_action_wl_2g_mcc(rtwdev);
@@ -5667,6 +5765,11 @@ static const char *steps_to_str(u16 step)
 	CASE_BTC_POLICY_STR(OFFB_BWB0);
 	CASE_BTC_POLICY_STR(OFFE_DEF);
 	CASE_BTC_POLICY_STR(OFFE_DEF2);
+	CASE_BTC_POLICY_STR(OFFE_2GBWISOB);
+	CASE_BTC_POLICY_STR(OFFE_2GISOB);
+	CASE_BTC_POLICY_STR(OFFE_2GBWMIXB);
+	CASE_BTC_POLICY_STR(OFFE_WL);
+	CASE_BTC_POLICY_STR(OFFE_2GBWMIXB2);
 	CASE_BTC_POLICY_STR(FIX_TD3030);
 	CASE_BTC_POLICY_STR(FIX_TD5050);
 	CASE_BTC_POLICY_STR(FIX_TD2030);

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

@@ -1159,6 +1159,12 @@ struct rtw89_btc_wl_role_info_bpos {
 	u16 nan: 1;
 };
 
+struct rtw89_btc_wl_scc_ctrl {
+	u8 null_role1;
+	u8 null_role2;
+	u8 ebt_null; /* if tx null at EBT slot */
+};
+
 union rtw89_btc_wl_role_info_map {
 	u16 val;
 	struct rtw89_btc_wl_role_info_bpos role;
@@ -1707,6 +1713,7 @@ struct rtw89_btc_dm {
 	struct rtw89_btc_rf_trx_para rf_trx_para;
 	struct rtw89_btc_wl_tx_limit_para wl_tx_limit;
 	struct rtw89_btc_dm_step dm_step;
+	struct rtw89_btc_wl_scc_ctrl wl_scc;
 	union rtw89_btc_dm_error_map error;
 	u32 cnt_dm[BTC_DCNT_NUM];
 	u32 cnt_notify[BTC_NCNT_NUM];