recipes-wifi/linux-mt76/files/patches/1024-wifi-mt76-mt7915-add-bf-backoff-limit-table-support.patch

From 9f9789d20b4956a7987409eeeb260c8977ddc0ff Mon Sep 17 00:00:00 2001
From: Shayne Chen <shayne.chen@mediatek.com>
Date: Mon, 5 Dec 2022 18:21:51 +0800
Subject: [PATCH 1024/1031] wifi: mt76: mt7915: add bf backoff limit table
 support

Signed-off-by: Shayne Chen <shayne.chen@mediatek.com>
---
 eeprom.c         |  36 +++++++++++--
 mt76.h           |   8 +++
 mt7915/debugfs.c |  73 ++++++++++++++++++++++++--
 mt7915/main.c    |   1 +
 mt7915/mcu.c     | 132 ++++++++++++++++++++++++++++++++++++-----------
 mt7915/mcu.h     |   6 +++
 mt7915/mt7915.h  |   4 +-
 7 files changed, 221 insertions(+), 39 deletions(-)

diff --git a/eeprom.c b/eeprom.c
index 412740f..0e0c960 100644
--- a/eeprom.c
+++ b/eeprom.c
@@ -311,13 +311,17 @@ s8 mt76_get_rate_power_limits(struct mt76_phy *phy,
 	u32 ru_rates = ARRAY_SIZE(dest->ru[0]);
 	char band;
 	size_t len;
-	s8 max_power = 0;
+	s8 max_power = -127;
+	s8 max_power_backoff = -127;
 	s8 txs_delta;
+	int n_chains = hweight8(phy->antenna_mask);
+	s8 target_power_combine = target_power + mt76_tx_power_nss_delta(n_chains);
 
 	if (!mcs_rates)
 		mcs_rates = 10;
 
-	memset(dest, target_power, sizeof(*dest));
+	memset(dest, target_power, sizeof(*dest) - sizeof(dest->path));
+	memset(&dest->path, 0, sizeof(dest->path));
 
 	if (!IS_ENABLED(CONFIG_OF))
 		return target_power;
@@ -370,7 +374,33 @@ s8 mt76_get_rate_power_limits(struct mt76_phy *phy,
 				     ARRAY_SIZE(dest->ru), val, len,
 				     target_power, txs_delta, &max_power);
 
-	return max_power;
+	max_power_backoff = max_power;
+	val = mt76_get_of_array(np, "paths-cck", &len, ARRAY_SIZE(dest->path.cck));
+	mt76_apply_array_limit(dest->path.cck, ARRAY_SIZE(dest->path.cck), val,
+			       target_power_combine, txs_delta, &max_power_backoff);
+
+	val = mt76_get_of_array(np, "paths-ofdm", &len, ARRAY_SIZE(dest->path.ofdm));
+	mt76_apply_array_limit(dest->path.ofdm, ARRAY_SIZE(dest->path.ofdm), val,
+			       target_power_combine, txs_delta, &max_power_backoff);
+
+	val = mt76_get_of_array(np, "paths-ofdm-bf", &len, ARRAY_SIZE(dest->path.ofdm_bf));
+	mt76_apply_array_limit(dest->path.ofdm_bf, ARRAY_SIZE(dest->path.ofdm_bf), val,
+			       target_power_combine, txs_delta, &max_power_backoff);
+
+	val = mt76_get_of_array(np, "paths-ru", &len, ARRAY_SIZE(dest->path.ru[0]) + 1);
+	mt76_apply_multi_array_limit(dest->path.ru[0], ARRAY_SIZE(dest->path.ru[0]),
+				     ARRAY_SIZE(dest->path.ru), val, len,
+				     target_power_combine, txs_delta, &max_power_backoff);
+
+	val = mt76_get_of_array(np, "paths-ru-bf", &len, ARRAY_SIZE(dest->path.ru_bf[0]) + 1);
+	mt76_apply_multi_array_limit(dest->path.ru_bf[0], ARRAY_SIZE(dest->path.ru_bf[0]),
+				     ARRAY_SIZE(dest->path.ru_bf), val, len,
+				     target_power_combine, txs_delta, &max_power_backoff);
+
+	if (max_power_backoff == target_power_combine)
+		return max_power;
+
+	return max_power_backoff;
 }
 EXPORT_SYMBOL_GPL(mt76_get_rate_power_limits);
 
diff --git a/mt76.h b/mt76.h
index b4e3429..2f801de 100644
--- a/mt76.h
+++ b/mt76.h
@@ -1030,6 +1030,14 @@ struct mt76_power_limits {
 	s8 ofdm[8];
 	s8 mcs[4][10];
 	s8 ru[7][12];
+
+	struct {
+		s8 cck[4];
+		s8 ofdm[4];
+		s8 ofdm_bf[4];
+		s8 ru[7][10];
+		s8 ru_bf[7][10];
+	} path;
 };
 
 struct mt76_ethtool_worker_info {
diff --git a/mt7915/debugfs.c b/mt7915/debugfs.c
index d66d104..2b63e56 100644
--- a/mt7915/debugfs.c
+++ b/mt7915/debugfs.c
@@ -1019,7 +1019,7 @@ mt7915_rate_txpower_get(struct file *file, char __user *user_buf,
 	if (!buf)
 		return -ENOMEM;
 
-	ret = mt7915_mcu_get_txpower_sku(phy, txpwr, sizeof(txpwr));
+	ret = mt7915_mcu_get_txpower_sku(phy, txpwr, sizeof(txpwr), TX_POWER_INFO_RATE);
 	if (ret)
 		goto out;
 
@@ -1129,7 +1129,7 @@ mt7915_rate_txpower_set(struct file *file, const char __user *user_buf,
 
 	mutex_lock(&dev->mt76.mutex);
 	ret = mt7915_mcu_get_txpower_sku(phy, req.txpower_sku,
-					 sizeof(req.txpower_sku));
+					 sizeof(req.txpower_sku), TX_POWER_INFO_RATE);
 	if (ret)
 		goto out;
 
@@ -1171,7 +1171,7 @@ out:
 	return ret ? ret : count;
 }
 
-static const struct file_operations mt7915_rate_txpower_fops = {
+static const struct file_operations mt7915_txpower_fops = {
 	.write = mt7915_rate_txpower_set,
 	.read = mt7915_rate_txpower_get,
 	.open = simple_open,
@@ -1179,6 +1179,69 @@ static const struct file_operations mt7915_rate_txpower_fops = {
 	.llseek = default_llseek,
 };
 
+static int
+mt7915_path_txpower_show(struct seq_file *file)
+{
+	struct mt7915_phy *phy = file->private;
+	s8 txpower[MT7915_SKU_PATH_NUM], *buf = txpower;
+	int ret;
+
+#define PATH_POWER_SHOW(_name, _len, _skip) do {				\
+		if (_skip) {						\
+			buf -= 1;					\
+			*buf = 0;					\
+		}							\
+		mt76_seq_puts_array(file, _name, buf, _len);		\
+		buf += _len;						\
+	} while(0)
+
+	seq_printf(file, "\n%*c", 11, ' ');
+	seq_printf(file, "1T1S/2T1S/3T1S/4T1S/2T2S/3T2S/4T2S/3T3S/4T3S/4T4S\n");
+	ret = mt7915_mcu_get_txpower_sku(phy, txpower, sizeof(txpower),
+					 TX_POWER_INFO_PATH);
+	if (ret)
+		return ret;
+
+	PATH_POWER_SHOW("CCK", 4, 0);
+	PATH_POWER_SHOW("OFDM", 4, 0);
+	PATH_POWER_SHOW("BF-OFDM", 4, 1);
+
+	PATH_POWER_SHOW("HT20", 10, 0);
+	PATH_POWER_SHOW("BF-HT20", 10, 1);
+	PATH_POWER_SHOW("HT40", 10, 0);
+	PATH_POWER_SHOW("BF-HT40", 10, 1);
+
+	PATH_POWER_SHOW("RU242", 10, 0);
+	PATH_POWER_SHOW("BF-RU242", 10, 1);
+	PATH_POWER_SHOW("RU484", 10, 0);
+	PATH_POWER_SHOW("BF-RU484", 10, 1);
+	PATH_POWER_SHOW("RU996", 10, 0);
+	PATH_POWER_SHOW("BF-RU996", 10, 1);
+	PATH_POWER_SHOW("RU2x996", 10, 0);
+	PATH_POWER_SHOW("BF-RU2x996", 10, 1);
+	PATH_POWER_SHOW("RU26", 10, 0);
+	PATH_POWER_SHOW("BF-RU26", 10, 0);
+	PATH_POWER_SHOW("RU52", 10, 0);
+	PATH_POWER_SHOW("BF-RU52", 10, 0);
+	PATH_POWER_SHOW("RU106", 10, 0);
+	PATH_POWER_SHOW("BF-RU106", 10, 0);
+#undef PATH_POWER_SHOW
+
+	return 0;
+}
+
+static int
+mt7915_txpower_path_show(struct seq_file *file, void *data)
+{
+	struct mt7915_phy *phy = file->private;
+
+	seq_printf(file, "\nBand %d\n", phy != &phy->dev->phy);
+
+	return mt7915_path_txpower_show(file);
+}
+
+DEFINE_SHOW_ATTRIBUTE(mt7915_txpower_path);
+
 static int
 mt7915_twt_stats(struct seq_file *s, void *data)
 {
@@ -1265,7 +1328,9 @@ int mt7915_init_debugfs(struct mt7915_phy *phy)
 	debugfs_create_file("implicit_txbf", 0600, dir, dev,
 			    &fops_implicit_txbf);
 	debugfs_create_file("txpower_sku", 0400, dir, phy,
-			    &mt7915_rate_txpower_fops);
+			    &mt7915_txpower_fops);
+	debugfs_create_file("txpower_path", 0400, dir, phy,
+			    &mt7915_txpower_path_fops);
 	debugfs_create_devm_seqfile(dev->mt76.dev, "twt_stats", dir,
 				    mt7915_twt_stats);
 	debugfs_create_file("rf_regval", 0600, dir, dev, &fops_rf_regval);
diff --git a/mt7915/main.c b/mt7915/main.c
index fcd69ea..155197b 100644
--- a/mt7915/main.c
+++ b/mt7915/main.c
@@ -1097,6 +1097,7 @@ mt7915_set_antenna(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant)
 	mt76_set_stream_caps(phy->mt76, true);
 	mt7915_set_stream_vht_txbf_caps(phy);
 	mt7915_set_stream_he_caps(phy);
+	mt7915_mcu_set_txpower_sku(phy);
 
 	mutex_unlock(&dev->mt76.mutex);
 
diff --git a/mt7915/mcu.c b/mt7915/mcu.c
index 07c7323..d87eb5c 100644
--- a/mt7915/mcu.c
+++ b/mt7915/mcu.c
@@ -3303,7 +3303,8 @@ int mt7915_mcu_set_txpower_frame(struct mt7915_phy *phy,
 	int ret;
 	s8 txpower_sku[MT7915_SKU_RATE_NUM];
 
-	ret = mt7915_mcu_get_txpower_sku(phy, txpower_sku, sizeof(txpower_sku));
+	ret = mt7915_mcu_get_txpower_sku(phy, txpower_sku, sizeof(txpower_sku),
+					 TX_POWER_INFO_RATE);
 	if (ret)
 		return ret;
 
@@ -3345,51 +3346,106 @@ int mt7915_mcu_set_txpower_frame(struct mt7915_phy *phy,
 
 int mt7915_mcu_set_txpower_sku(struct mt7915_phy *phy)
 {
+#define TX_POWER_LIMIT_TABLE_RATE	0
+#define TX_POWER_LIMIT_TABLE_PATH	1
 	struct mt7915_dev *dev = phy->dev;
 	struct mt76_phy *mphy = phy->mt76;
 	struct ieee80211_hw *hw = mphy->hw;
-	struct mt7915_mcu_txpower_sku req = {
+	struct mt7915_sku_val {
+		u8 format_id;
+		u8 limit_type;
+		u8 band_idx;
+	} __packed hdr = {
 		.format_id = TX_POWER_LIMIT_TABLE,
+		.limit_type = TX_POWER_LIMIT_TABLE_RATE,
 		.band_idx = phy->mt76->band_idx,
 	};
-	struct mt76_power_limits limits_array;
-	s8 *la = (s8 *)&limits_array;
-	int i, idx;
-	int tx_power;
+	int i, ret, tx_power;
+	const u8 *len = mt7915_sku_group_len;
+	struct mt76_power_limits la = {};
+	struct sk_buff *skb;
 
 	tx_power = mt7915_get_power_bound(phy, hw->conf.power_level);
 	tx_power = mt76_get_rate_power_limits(mphy, mphy->chandef.chan,
-					      &limits_array, tx_power);
+					      &la, tx_power);
 	mphy->txpower_cur = tx_power;
 
-	for (i = 0, idx = 0; i < ARRAY_SIZE(mt7915_sku_group_len); i++) {
-		u8 mcs_num, len = mt7915_sku_group_len[i];
-		int j;
+	skb = mt76_mcu_msg_alloc(&dev->mt76, NULL,
+				 sizeof(hdr) + MT7915_SKU_RATE_NUM);
+	if (!skb)
+		return -ENOMEM;
 
-		if (i >= SKU_HT_BW20 && i <= SKU_VHT_BW160) {
-			mcs_num = 10;
+	skb_put_data(skb, &hdr, sizeof(hdr));
+	skb_put_data(skb, &la.cck, len[SKU_CCK] + len[SKU_OFDM]);
+	skb_put_data(skb, &la.mcs[0], len[SKU_HT_BW20]);
+	skb_put_data(skb, &la.mcs[1], len[SKU_HT_BW40]);
 
-			if (i == SKU_HT_BW20 || i == SKU_VHT_BW20)
-				la = (s8 *)&limits_array + 12;
-		} else {
-			mcs_num = len;
-		}
+	/* vht */
+	for (i = 0; i < 4; i++) {
+		skb_put_data(skb, &la.mcs[i], sizeof(la.mcs[i]));
+		skb_put_zero(skb, 2);  /* padding */
+	}
+
+	/* he */
+	skb_put_data(skb, &la.ru[0], sizeof(la.ru));
 
-		for (j = 0; j < min_t(u8, mcs_num, len); j++)
-			req.txpower_sku[idx + j] = la[j];
+	ret = mt76_mcu_skb_send_msg(&dev->mt76, skb,
+				    MCU_EXT_CMD(TX_POWER_FEATURE_CTRL), true);
+	if (ret)
+		return ret;
+
+	/* only set per-path power table when it's configured */
+	if (!la.path.ofdm[0])
+		return 0;
 
-		la += mcs_num;
-		idx += len;
+	skb = mt76_mcu_msg_alloc(&dev->mt76, NULL,
+				 sizeof(hdr) + MT7915_SKU_PATH_NUM);
+	if (!skb)
+		return -ENOMEM;
+
+	hdr.limit_type = TX_POWER_LIMIT_TABLE_PATH;
+	skb_put_data(skb, &hdr, sizeof(hdr));
+	skb_put_data(skb, &la.path.cck, sizeof(la.path.cck));
+	skb_put_data(skb, &la.path.ofdm, sizeof(la.path.ofdm));
+	skb_put_data(skb, &la.path.ofdm_bf[1], sizeof(la.path.ofdm_bf) - 1);
+
+	/* HT20 and HT40 */
+	skb_put_data(skb, &la.path.ru[3], sizeof(la.path.ru[3]));
+	skb_put_data(skb, &la.path.ru_bf[3][1], sizeof(la.path.ru_bf[3]) - 1);
+	skb_put_data(skb, &la.path.ru[4], sizeof(la.path.ru[4]));
+	skb_put_data(skb, &la.path.ru_bf[4][1], sizeof(la.path.ru_bf[4]) - 1);
+
+	/* start from non-bf and bf fields of
+	 * BW20/RU242, BW40/RU484, BW80/RU996, BW160/RU2x996,
+	 * RU26, RU52, and RU106
+	 */
+
+	for (i = 0; i < 8; i++) {
+		bool bf = i % 2;
+		u8 idx = (i + 6) / 2;
+		s8 *buf = bf ? la.path.ru_bf[idx] : la.path.ru[idx];
+		/* The non-bf fields of RU26 to RU106 are special cases */
+		if (bf)
+			skb_put_data(skb, buf + 1, 9);
+		else
+			skb_put_data(skb, buf, 10);
 	}
 
-	return mt76_mcu_send_msg(&dev->mt76,
-				 MCU_EXT_CMD(TX_POWER_FEATURE_CTRL), &req,
-				 sizeof(req), true);
+	for (i = 0; i < 6; i++) {
+		bool bf = i % 2;
+		u8 idx = i / 2;
+		s8 *buf = bf ? la.path.ru_bf[idx] : la.path.ru[idx];
+
+		skb_put_data(skb, buf, 10);
+	}
+
+	return mt76_mcu_skb_send_msg(&dev->mt76, skb,
+				     MCU_EXT_CMD(TX_POWER_FEATURE_CTRL), true);
 }
 
-int mt7915_mcu_get_txpower_sku(struct mt7915_phy *phy, s8 *txpower, int len)
+int mt7915_mcu_get_txpower_sku(struct mt7915_phy *phy, s8 *txpower, int len,
+			       u8 category)
 {
-#define RATE_POWER_INFO	2
 	struct mt7915_dev *dev = phy->dev;
 	struct {
 		u8 format_id;
@@ -3398,10 +3454,9 @@ int mt7915_mcu_get_txpower_sku(struct mt7915_phy *phy, s8 *txpower, int len)
 		u8 _rsv;
 	} __packed req = {
 		.format_id = TX_POWER_LIMIT_INFO,
-		.category = RATE_POWER_INFO,
+		.category = category,
 		.band_idx = phy->mt76->band_idx,
 	};
-	s8 txpower_sku[MT7915_SKU_RATE_NUM][2];
 	struct sk_buff *skb;
 	int ret, i;
 
@@ -3411,9 +3466,15 @@ int mt7915_mcu_get_txpower_sku(struct mt7915_phy *phy, s8 *txpower, int len)
 	if (ret)
 		return ret;
 
-	memcpy(txpower_sku, skb->data + 4, sizeof(txpower_sku));
-	for (i = 0; i < len; i++)
-		txpower[i] = txpower_sku[i][req.band_idx];
+	if (category == TX_POWER_INFO_RATE) {
+		s8 res[MT7915_SKU_RATE_NUM][2];
+
+		memcpy(res, skb->data + 4, sizeof(res));
+		for (i = 0; i < len; i++)
+			txpower[i] = res[i][req.band_idx];
+	} else if (category == TX_POWER_INFO_PATH) {
+		memcpy(txpower, skb->data + 4, len);
+	}
 
 	dev_kfree_skb(skb);
 
@@ -3455,9 +3516,18 @@ int mt7915_mcu_set_sku_en(struct mt7915_phy *phy, bool enable)
 		.band_idx = phy->mt76->band_idx,
 		.sku_enable = enable,
 	};
+	int ret;
+
+	ret = mt76_mcu_send_msg(&dev->mt76,
+				MCU_EXT_CMD(TX_POWER_FEATURE_CTRL), &req,
+				sizeof(req), true);
+	if (ret)
+		return ret;
 
 	pr_info("%s: enable = %d\n", __func__, enable);
 
+	req.format_id = TX_POWER_LIMIT_PATH_ENABLE;
+
 	return mt76_mcu_send_msg(&dev->mt76,
 				 MCU_EXT_CMD(TX_POWER_FEATURE_CTRL), &req,
 				 sizeof(req), true);
diff --git a/mt7915/mcu.h b/mt7915/mcu.h
index 3da650c..240a315 100644
--- a/mt7915/mcu.h
+++ b/mt7915/mcu.h
@@ -502,12 +502,18 @@ enum {
 
 enum {
 	TX_POWER_LIMIT_ENABLE,
+	TX_POWER_LIMIT_PATH_ENABLE = 0x3,
 	TX_POWER_LIMIT_TABLE = 0x4,
 	TX_POWER_LIMIT_INFO = 0x7,
 	TX_POWER_LIMIT_FRAME = 0x11,
 	TX_POWER_LIMIT_FRAME_MIN = 0x12,
 };
 
+enum {
+	TX_POWER_INFO_PATH = 1,
+	TX_POWER_INFO_RATE,
+};
+
 enum {
 	SPR_ENABLE = 0x1,
 	SPR_ENABLE_SD = 0x3,
diff --git a/mt7915/mt7915.h b/mt7915/mt7915.h
index bbcdd93..b80c607 100644
--- a/mt7915/mt7915.h
+++ b/mt7915/mt7915.h
@@ -72,6 +72,7 @@
 #define MT7915_CDEV_THROTTLE_MAX	99
 
 #define MT7915_SKU_RATE_NUM		161
+#define MT7915_SKU_PATH_NUM		185
 
 #define MT7915_MAX_TWT_AGRT		16
 #define MT7915_MAX_STA_TWT_AGRT		8
@@ -570,7 +571,8 @@ int mt7915_mcu_set_test_param(struct mt7915_dev *dev, u8 param, bool test_mode,
 int mt7915_mcu_set_ser(struct mt7915_dev *dev, u8 action, u8 set, u8 band);
 int mt7915_mcu_set_sku_en(struct mt7915_phy *phy, bool enable);
 int mt7915_mcu_set_txpower_sku(struct mt7915_phy *phy);
-int mt7915_mcu_get_txpower_sku(struct mt7915_phy *phy, s8 *txpower, int len);
+int mt7915_mcu_get_txpower_sku(struct mt7915_phy *phy, s8 *txpower, int len,
+			       u8 category);
 int mt7915_mcu_set_txpower_frame_min(struct mt7915_phy *phy, s8 txpower);
 int mt7915_mcu_set_txpower_frame(struct mt7915_phy *phy,
 				 struct ieee80211_vif *vif,
-- 
2.18.0