From 8a932d446bb0da8b7aa4cc7ea8ed541e002cf015 Mon Sep 17 00:00:00 2001
From: Peter Chiu <chui-hao.chiu@mediatek.com>
Date: Fri, 2 Sep 2022 14:40:40 +0800
Subject: [PATCH] mt76: mt7915: enable red per-band token drop for HW Path

Limit the number of token used by each band. If a band uses too many token,
it may hurt the throughput of the other band. The SW path can solve this
problem by AQL.

Signed-off-by: Peter Chiu <chui-hao.chiu@mediatek.com>
---
 mt7915/mcu.c    | 53 +++++++++++++++++++++++++++++++++++++++----------
 mt7915/mcu.h    |  1 +
 mt7915/mt7915.h |  3 ++-
 3 files changed, 46 insertions(+), 11 deletions(-)

diff --git a/mt7915/mcu.c b/mt7915/mcu.c
index 16349c58..2ef353b2 100644
--- a/mt7915/mcu.c
+++ b/mt7915/mcu.c
@@ -2320,8 +2320,13 @@ int mt7915_mcu_init_firmware(struct mt7915_dev *dev)
 			mt7915_mcu_wa_cmd(dev, MCU_WA_PARAM_CMD(SET),
 					  MCU_WA_PARAM_WED_VERSION,
 					  wed->rev_id, 0);
+
+		mt7915_mcu_set_red(dev, true);
+	} else {
+		mt7915_mcu_set_red(dev, false);
 	}
 
+
 	ret = mt7915_mcu_set_mwds(dev, 1);
 	if (ret)
 		return ret;
@@ -2331,12 +2336,7 @@ int mt7915_mcu_init_firmware(struct mt7915_dev *dev)
 	if (ret)
 		return ret;
 
-	ret = mt7915_mcu_init_rx_airtime(dev);
-	if (ret)
-		return ret;
-
-	return mt7915_mcu_wa_cmd(dev, MCU_WA_PARAM_CMD(SET),
-				 MCU_WA_PARAM_RED, 0, 0);
+	return mt7915_mcu_init_rx_airtime(dev);
 }
 
 int mt7915_mcu_init(struct mt7915_dev *dev)
@@ -4162,6 +4162,35 @@ int mt7915_dbg_mcu_wa_cmd(struct mt7915_dev *dev, int cmd, u32 a1, u32 a2, u32 a
 
 	return mt76_mcu_send_msg(&dev->mt76, cmd, &req, sizeof(req), wait_resp);
 }
+#endif
+
+static int mt7915_red_set_watermark(struct mt7915_dev *dev)
+{
+#define RED_GLOBAL_TOKEN_WATERMARK 2
+#define TOTAL_HW_TOKEN_SIZE 8192
+	struct {
+		__le32 args[3];
+
+		u8 cmd;
+		u8 version;
+		u8 __rsv1[4];
+		u16 len;
+
+		__le16 high_mark;
+		__le16 low_mark;
+		u8 __rsv2[12];
+	} req = {
+		.args[0] = cpu_to_le32(MCU_WA_PARAM_RED_SETTING),
+		.cmd = RED_GLOBAL_TOKEN_WATERMARK,
+		.len = cpu_to_le16(sizeof(req) - 12),
+
+		.high_mark = cpu_to_le16(TOTAL_HW_TOKEN_SIZE - 256),
+		.low_mark = cpu_to_le16(TOTAL_HW_TOKEN_SIZE - 256 - 1536),
+	};
+
+	return mt76_mcu_send_msg(&dev->mt76, MCU_WA_PARAM_CMD(SET), &req,
+				 sizeof(req), false);
+}
 
 int mt7915_mcu_set_red(struct mt7915_dev *dev, bool enabled)
 {
@@ -4172,17 +4201,21 @@ int mt7915_mcu_set_red(struct mt7915_dev *dev, bool enabled)
 	u32 red_type = enabled > 0 ? RED_BY_WA_ENABLE : RED_DISABLE;
 	__le32 req = cpu_to_le32(red_type);
 
+	if (enabled) {
+		ret = mt7915_red_set_watermark(dev);
+		if (ret < 0)
+			return ret;
+	}
+
 	ret = mt76_mcu_send_msg(&dev->mt76, MCU_EXT_CMD(RED_ENABLE), &req,
 				 sizeof(req), false);
 	if (ret < 0)
 		return ret;
 
-	mt7915_dbg_mcu_wa_cmd(dev, MCU_WA_PARAM_CMD(SET),
-			  MCU_WA_PARAM_RED, enabled, 0, true);
+	return mt7915_mcu_wa_cmd(dev, MCU_WA_PARAM_CMD(SET),
+				 MCU_WA_PARAM_RED, enabled, 0);
 
-	return 0;
 }
-#endif
 
 int mt7915_mcu_rf_regval(struct mt7915_dev *dev, u32 regidx, u32 *val, bool set)
 {
diff --git a/mt7915/mcu.h b/mt7915/mcu.h
index 4ae8d532..14a0972b 100644
--- a/mt7915/mcu.h
+++ b/mt7915/mcu.h
@@ -271,6 +271,7 @@ enum {
 	MCU_WA_PARAM_RED_TARGET_DELAY = 0x10,
 #endif
 	MCU_WA_PARAM_WED_VERSION = 0x32,
+	MCU_WA_PARAM_RED_SETTING = 0x40,
 };
 
 enum mcu_mmps_mode {
diff --git a/mt7915/mt7915.h b/mt7915/mt7915.h
index 46670de4..d8765041 100644
--- a/mt7915/mt7915.h
+++ b/mt7915/mt7915.h
@@ -773,13 +773,14 @@ int mt7915_vendor_amnt_sta_remove(struct mt7915_phy *phy,
 #endif
 int mt7915_mcu_set_edcca(struct mt7915_phy *phy, int mode, u8 *value, s8 compensation);
 int mt7915_mcu_get_edcca(struct mt7915_phy *phy, u8 mode, s8 *value);
+int mt7915_mcu_set_red(struct mt7915_dev *dev, bool enabled);
+
 int mt7915_mcu_ipi_hist_ctrl(struct mt7915_phy *phy, void *data, u8 cmd, bool wait_resp);
 int mt7915_mcu_ipi_hist_scan(struct mt7915_phy *phy, void *data, u8 mode, bool wait_resp);
 
 #ifdef MTK_DEBUG
 int mt7915_mtk_init_debugfs(struct mt7915_phy *phy, struct dentry *dir);
 int mt7915_dbg_mcu_wa_cmd(struct mt7915_dev *dev, int cmd, u32 a1, u32 a2, u32 a3, bool wait_resp);
-int mt7915_mcu_set_red(struct mt7915_dev *dev, bool enabled);
 void mt7915_dump_tmac_info(u8 *tmac_info);
 int mt7915_mcu_set_txpower_level(struct mt7915_phy *phy, u8 drop_level);
 void mt7915_packet_log_to_host(struct mt7915_dev *dev, const void *data, int len, int type, int des_len);
-- 
2.18.0