mt76: mt7915: add 6 GHz support

Basic 6 GHz support is added to mt76.
Modification includes:
1. Add 6 GHz E2P definition
2. Register 6 GHz HE cap
3. Refactor existing code of adding a STA

This adds support for Wi-Fi 6E on MT7986/MT7916.
Detailed link:
https://www.mediatek.com/products/mediatek-filogic-830
Detailed link:
https://www.mediatek.com/products/products/broadband-wifi/mediatek-filogic-630Reviewed-by: Ryder Lee <ryder.lee@mediatek.com>
Signed-off-by: Shayne Chen <Shayne.Chen@mediatek.com>
Signed-off-by: Peter Chiu <Chui-Hao.Chiu@mediatek.com>
Signed-off-by: Money Wang <Money.Wang@mediatek.com>
Signed-off-by: MeiChia Chiu <MeiChia.Chiu@mediatek.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>

drivers/net/wireless/mediatek/mt76/mt7915/eeprom.c

@@ -135,9 +135,24 @@ static void mt7915_eeprom_parse_band_config(struct mt7915_phy *phy)
 
 	val = eeprom[MT_EE_WIFI_CONF + phy->band_idx];
 	val = FIELD_GET(MT_EE_WIFI_CONF0_BAND_SEL, val);
-	if (val == MT_EE_BAND_SEL_DEFAULT &&
-	    (!is_mt7915(&dev->mt76) || dev->dbdc_support))
-		val = phy->band_idx ? MT_EE_BAND_SEL_5GHZ : MT_EE_BAND_SEL_2GHZ;
+
+	if (!is_mt7915(&dev->mt76)) {
+		switch (val) {
+		case MT_EE_V2_BAND_SEL_5GHZ:
+			phy->mt76->cap.has_5ghz = true;
+			return;
+		case MT_EE_V2_BAND_SEL_6GHZ:
+			phy->mt76->cap.has_6ghz = true;
+			return;
+		case MT_EE_V2_BAND_SEL_5GHZ_6GHZ:
+			phy->mt76->cap.has_5ghz = true;
+			phy->mt76->cap.has_6ghz = true;
+			return;
+		default:
+			phy->mt76->cap.has_2ghz = true;
+			return;
+		}
+	}
 
 	switch (val) {
 	case MT_EE_BAND_SEL_5GHZ:

drivers/net/wireless/mediatek/mt76/mt7915/eeprom.h

@@ -76,6 +76,13 @@ enum mt7915_eeprom_band {
 	MT_EE_BAND_SEL_DUAL,
 };
 
+enum {
+	MT_EE_V2_BAND_SEL_2GHZ,
+	MT_EE_V2_BAND_SEL_5GHZ,
+	MT_EE_V2_BAND_SEL_6GHZ,
+	MT_EE_V2_BAND_SEL_5GHZ_6GHZ,
+};
+
 enum mt7915_sku_rate_group {
 	SKU_CCK,
 	SKU_OFDM,

drivers/net/wireless/mediatek/mt76/mt7915/init.c

@@ -872,7 +872,7 @@ mt7915_init_he_caps(struct mt7915_phy *phy, enum nl80211_band band,
 		if (band == NL80211_BAND_2GHZ)
 			he_cap_elem->phy_cap_info[0] =
 				IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G;
-		else if (band == NL80211_BAND_5GHZ)
+		else
 			he_cap_elem->phy_cap_info[0] =
 				IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G |
 				IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G |
@@ -911,7 +911,7 @@ mt7915_init_he_caps(struct mt7915_phy *phy, enum nl80211_band band,
 			if (band == NL80211_BAND_2GHZ)
 				he_cap_elem->phy_cap_info[0] |=
 					IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_RU_MAPPING_IN_2G;
-			else if (band == NL80211_BAND_5GHZ)
+			else
 				he_cap_elem->phy_cap_info[0] |=
 					IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_RU_MAPPING_IN_5G;
 
@@ -961,6 +961,21 @@ mt7915_init_he_caps(struct mt7915_phy *phy, enum nl80211_band band,
 				u8_encode_bits(IEEE80211_HE_PHY_CAP9_NOMINAL_PKT_PADDING_16US,
 					       IEEE80211_HE_PHY_CAP9_NOMINAL_PKT_PADDING_MASK);
 		}
+
+		if (band == NL80211_BAND_6GHZ) {
+			u16 cap = IEEE80211_HE_6GHZ_CAP_TX_ANTPAT_CONS |
+				  IEEE80211_HE_6GHZ_CAP_RX_ANTPAT_CONS;
+
+			cap |= u16_encode_bits(IEEE80211_HT_MPDU_DENSITY_8,
+					       IEEE80211_HE_6GHZ_CAP_MIN_MPDU_START) |
+			       u16_encode_bits(IEEE80211_VHT_MAX_AMPDU_1024K,
+					       IEEE80211_HE_6GHZ_CAP_MAX_AMPDU_LEN_EXP) |
+			       u16_encode_bits(IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_11454,
+					       IEEE80211_HE_6GHZ_CAP_MAX_MPDU_LEN);
+
+			data[idx].he_6ghz_capa.capa = cpu_to_le16(cap);
+		}
+
 		idx++;
 	}
 
@@ -990,6 +1005,15 @@ void mt7915_set_stream_he_caps(struct mt7915_phy *phy)
 		band->iftype_data = data;
 		band->n_iftype_data = n;
 	}
+
+	if (phy->mt76->cap.has_6ghz) {
+		data = phy->iftype[NL80211_BAND_6GHZ];
+		n = mt7915_init_he_caps(phy, NL80211_BAND_6GHZ, data);
+
+		band = &phy->mt76->sband_6g.sband;
+		band->iftype_data = data;
+		band->n_iftype_data = n;
+	}
 }
 
 static void mt7915_unregister_ext_phy(struct mt7915_dev *dev)

drivers/net/wireless/mediatek/mt76/mt7915/mac.c

@@ -638,6 +638,8 @@ mt7915_mac_fill_rx(struct mt7915_dev *dev, struct sk_buff *skb)
 	status->band = mphy->chandef.chan->band;
 	if (status->band == NL80211_BAND_5GHZ)
 		sband = &mphy->sband_5g.sband;
+	else if (status->band == NL80211_BAND_6GHZ)
+		sband = &mphy->sband_6g.sband;
 	else
 		sband = &mphy->sband_2g.sband;
 
@@ -1351,7 +1353,7 @@ mt7915_tx_check_aggr(struct ieee80211_sta *sta, __le32 *txwi)
 	u16 fc, tid;
 	u32 val;
 
-	if (!sta || !sta->ht_cap.ht_supported)
+	if (!sta || !(sta->ht_cap.ht_supported || sta->he_cap.has_he))
 		return;
 
 	tid = FIELD_GET(MT_TXD1_TID, le32_to_cpu(txwi[1]));
@@ -1559,6 +1561,8 @@ mt7915_mac_add_txs_skb(struct mt7915_dev *dev, struct mt76_wcid *wcid, int pid,
 
 		if (mphy->chandef.chan->band == NL80211_BAND_5GHZ)
 			sband = &mphy->sband_5g.sband;
+		else if (mphy->chandef.chan->band == NL80211_BAND_6GHZ)
+			sband = &mphy->sband_6g.sband;
 		else
 			sband = &mphy->sband_2g.sband;
 
@@ -1804,7 +1808,7 @@ void mt7915_mac_set_timing(struct mt7915_phy *phy)
 	u32 ofdm = FIELD_PREP(MT_TIMEOUT_VAL_PLCP, 60) |
 		   FIELD_PREP(MT_TIMEOUT_VAL_CCA, 28);
 	int offset;
-	bool is_5ghz = phy->mt76->chandef.chan->band == NL80211_BAND_5GHZ;
+	bool a_band = !(phy->mt76->chandef.chan->band == NL80211_BAND_2GHZ);
 
 	if (!test_bit(MT76_STATE_RUNNING, &phy->mt76->state))
 		return;
@@ -1824,7 +1828,7 @@ void mt7915_mac_set_timing(struct mt7915_phy *phy)
 	mt76_wr(dev, MT_TMAC_CDTR(phy->band_idx), cck + reg_offset);
 	mt76_wr(dev, MT_TMAC_ODTR(phy->band_idx), ofdm + reg_offset);
 	mt76_wr(dev, MT_TMAC_ICR0(phy->band_idx),
-		FIELD_PREP(MT_IFS_EIFS_OFDM, is_5ghz ? 84 : 78) |
+		FIELD_PREP(MT_IFS_EIFS_OFDM, a_band ? 84 : 78) |
 		FIELD_PREP(MT_IFS_RIFS, 2) |
 		FIELD_PREP(MT_IFS_SIFS, 10) |
 		FIELD_PREP(MT_IFS_SLOT, phy->slottime));
@@ -1832,7 +1836,7 @@ void mt7915_mac_set_timing(struct mt7915_phy *phy)
 	mt76_wr(dev, MT_TMAC_ICR1(phy->band_idx),
 		FIELD_PREP(MT_IFS_EIFS_CCK, 314));
 
-	if (phy->slottime < 20 || is_5ghz)
+	if (phy->slottime < 20 || a_band)
 		val = MT7915_CFEND_RATE_DEFAULT;
 	else
 		val = MT7915_CFEND_RATE_11B;

drivers/net/wireless/mediatek/mt76/mt7915/mcu.c

@@ -987,6 +987,9 @@ mt7915_mcu_sta_ht_tlv(struct sk_buff *skb, struct ieee80211_sta *sta)
 	struct sta_rec_ht *ht;
 	struct tlv *tlv;
 
+	if (!sta->ht_cap.ht_supported)
+		return;
+
 	tlv = mt76_connac_mcu_add_tlv(skb, STA_REC_HT, sizeof(*ht));
 
 	ht = (struct sta_rec_ht *)tlv;
@@ -1267,6 +1270,9 @@ mt7915_mcu_sta_bfer_tlv(struct mt7915_dev *dev, struct sk_buff *skb,
 	};
 	bool ebf;
 
+	if (!(sta->ht_cap.ht_supported || sta->he_cap.has_he))
+		return;
+
 	ebf = mt7915_is_ebf_supported(phy, vif, sta, false);
 	if (!ebf && !dev->ibf)
 		return;
@@ -1327,6 +1333,9 @@ mt7915_mcu_sta_bfee_tlv(struct mt7915_dev *dev, struct sk_buff *skb,
 	struct tlv *tlv;
 	u8 nrow = 0;
 
+	if (!(sta->vht_cap.vht_supported || sta->he_cap.has_he))
+		return;
+
 	if (!mt7915_is_ebf_supported(phy, vif, sta, true))
 		return;
 
@@ -1621,6 +1630,10 @@ mt7915_mcu_sta_rate_ctrl_tlv(struct sk_buff *skb, struct mt7915_dev *dev,
 	if (sta->he_cap.has_he) {
 		ra->supp_mode |= MODE_HE;
 		cap |= STA_CAP_HE;
+
+		if (sta->he_6ghz_capa.capa)
+			ra->af = le16_get_bits(sta->he_6ghz_capa.capa,
+					       IEEE80211_HE_6GHZ_CAP_MAX_AMPDU_LEN_EXP);
 	}
 
 	ra->sta_cap = cpu_to_le32(cap);
@@ -1643,7 +1656,7 @@ int mt7915_mcu_add_rate_ctrl(struct mt7915_dev *dev, struct ieee80211_vif *vif,
 	 * once dev->rc_work changes the settings driver should also
 	 * update sta_rec_he here.
 	 */
-	if (sta->he_cap.has_he && changed)
+	if (changed)
 		mt7915_mcu_sta_he_tlv(skb, sta, vif);
 
 	/* sta_rec_ra accommodates BW, NSS and only MCS range format
@@ -1712,7 +1725,7 @@ int mt7915_mcu_add_sta(struct mt7915_dev *dev, struct ieee80211_vif *vif,
 		goto out;
 
 	/* tag order is in accordance with firmware dependency. */
-	if (sta && sta->ht_cap.ht_supported) {
+	if (sta) {
 		/* starec bfer */
 		mt7915_mcu_sta_bfer_tlv(dev, skb, vif, sta);
 		/* starec ht */
@@ -1729,7 +1742,7 @@ int mt7915_mcu_add_sta(struct mt7915_dev *dev, struct ieee80211_vif *vif,
 		return ret;
 	}
 
-	if (sta && sta->ht_cap.ht_supported) {
+	if (sta) {
 		/* starec amsdu */
 		mt7915_mcu_sta_amsdu_tlv(dev, skb, vif, sta);
 		/* starec he */
@@ -2772,6 +2785,11 @@ int mt7915_mcu_rdd_background_enable(struct mt7915_phy *phy,
 
 int mt7915_mcu_set_chan_info(struct mt7915_phy *phy, int cmd)
 {
+	static const u8 ch_band[] = {
+		[NL80211_BAND_2GHZ] = 0,
+		[NL80211_BAND_5GHZ] = 1,
+		[NL80211_BAND_6GHZ] = 2,
+	};
 	struct mt7915_dev *dev = phy->dev;
 	struct cfg80211_chan_def *chandef = &phy->mt76->chandef;
 	int freq1 = chandef->center_freq1;
@@ -2799,7 +2817,7 @@ int mt7915_mcu_set_chan_info(struct mt7915_phy *phy, int cmd)
 		.tx_streams_num = hweight8(phy->mt76->antenna_mask),
 		.rx_streams = phy->mt76->antenna_mask,
 		.band_idx = phy->band_idx,
-		.channel_band = chandef->chan->band,
+		.channel_band = ch_band[chandef->chan->band],
 	};
 
 #ifdef CONFIG_NL80211_TESTMODE
@@ -3461,6 +3479,8 @@ int mt7915_mcu_get_rx_rate(struct mt7915_phy *phy, struct ieee80211_vif *vif,
 	case MT_PHY_TYPE_OFDM:
 		if (mphy->chandef.chan->band == NL80211_BAND_5GHZ)
 			sband = &mphy->sband_5g.sband;
+		else if (mphy->chandef.chan->band == NL80211_BAND_6GHZ)
+			sband = &mphy->sband_6g.sband;
 		else
 			sband = &mphy->sband_2g.sband;
 

drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h

@@ -227,7 +227,7 @@ struct mt7915_phy {
 	struct mt76_phy *mt76;
 	struct mt7915_dev *dev;
 
-	struct ieee80211_sband_iftype_data iftype[2][NUM_NL80211_IFTYPES];
+	struct ieee80211_sband_iftype_data iftype[NUM_NL80211_BANDS][NUM_NL80211_IFTYPES];
 
 	struct ieee80211_vif *monitor_vif;
 

drivers/net/wireless/mediatek/mt76/mt7915/testmode.c

@@ -271,6 +271,8 @@ mt7915_tm_set_tx_len(struct mt7915_phy *phy, u32 tx_time)
 	case MT76_TM_TX_MODE_OFDM:
 		if (mphy->chandef.chan->band == NL80211_BAND_5GHZ)
 			sband = &mphy->sband_5g.sband;
+		else if (mphy->chandef.chan->band == NL80211_BAND_6GHZ)
+			sband = &mphy->sband_6g.sband;
 		else
 			sband = &mphy->sband_2g.sband;
 
@@ -572,6 +574,8 @@ mt7915_tm_set_tx_cont(struct mt7915_phy *phy, bool en)
 
 		if (chandef->chan->band == NL80211_BAND_5GHZ)
 			sband = &phy->mt76->sband_5g.sband;
+		else if (chandef->chan->band == NL80211_BAND_6GHZ)
+			sband = &phy->mt76->sband_6g.sband;
 		else
 			sband = &phy->mt76->sband_2g.sband;