wifi: mt76: mt7925: enabling MLO when the firmware supports it

Register MLD capability for the firmware supporting MLO.
Co-developed-by: Ming Yen Hsieh <mingyen.hsieh@mediatek.com>
Signed-off-by: Ming Yen Hsieh <mingyen.hsieh@mediatek.com>
Co-developed-by: Deren Wu <deren.wu@mediatek.com>
Signed-off-by: Deren Wu <deren.wu@mediatek.com>
Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Link: https://patch.msgid.link/49c796b101e792c84bc2c0d74753022b75fd3355.1720248331.git.sean.wang@kernel.orgSigned-off-by: Felix Fietkau <nbd@nbd.name>

drivers/net/wireless/mediatek/mt76/mt76_connac_mcu.h

@@ -1402,6 +1402,7 @@ enum {
 	MT_NIC_CAP_WFDMA_REALLOC,
 	MT_NIC_CAP_6G,
 	MT_NIC_CAP_CHIP_CAP = 0x20,
+	MT_NIC_CAP_EML_CAP = 0x22,
 };
 
 #define UNI_WOW_DETECT_TYPE_MAGIC		BIT(0)

drivers/net/wireless/mediatek/mt76/mt7925/init.c

@@ -179,6 +179,12 @@ static void mt7925_init_work(struct work_struct *work)
 	mt76_set_stream_caps(&dev->mphy, true);
 	mt7925_set_stream_he_eht_caps(&dev->phy);
 
+	ret = mt7925_init_mlo_caps(&dev->phy);
+	if (ret) {
+		dev_err(dev->mt76.dev, "MLO init failed\n");
+		return;
+	}
+
 	ret = mt76_register_device(&dev->mt76, true, mt76_rates,
 				   ARRAY_SIZE(mt76_rates));
 	if (ret) {

drivers/net/wireless/mediatek/mt76/mt7925/main.c

@@ -236,6 +236,35 @@ mt7925_init_eht_caps(struct mt792x_phy *phy, enum nl80211_band band,
 	eht_nss->bw._160.rx_tx_mcs13_max_nss = val;
 }
 
+int mt7925_init_mlo_caps(struct mt792x_phy *phy)
+{
+	struct wiphy *wiphy = phy->mt76->hw->wiphy;
+	static const u8 ext_capa_sta[] = {
+		[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF,
+	};
+	static struct wiphy_iftype_ext_capab ext_capab[] = {
+		{
+			.iftype = NL80211_IFTYPE_STATION,
+			.extended_capabilities = ext_capa_sta,
+			.extended_capabilities_mask = ext_capa_sta,
+			.extended_capabilities_len = sizeof(ext_capa_sta),
+		},
+	};
+
+	if (!(phy->chip_cap & MT792x_CHIP_CAP_MLO_EVT_EN))
+		return 0;
+
+	ext_capab[0].eml_capabilities = phy->eml_cap;
+	ext_capab[0].mld_capa_and_ops =
+		u16_encode_bits(1, IEEE80211_MLD_CAP_OP_MAX_SIMUL_LINKS);
+
+	wiphy->flags |= WIPHY_FLAG_SUPPORTS_MLO;
+	wiphy->iftype_ext_capab = ext_capab;
+	wiphy->num_iftype_ext_capab = ARRAY_SIZE(ext_capab);
+
+	return 0;
+}
+
 static void
 __mt7925_set_stream_he_eht_caps(struct mt792x_phy *phy,
 				struct ieee80211_supported_band *sband,

drivers/net/wireless/mediatek/mt76/mt7925/mcu.c

@@ -751,6 +751,20 @@ mt7925_mcu_parse_phy_cap(struct mt792x_dev *dev, char *data)
 	dev->has_eht = cap->eht;
 }
 
+static void
+mt7925_mcu_parse_eml_cap(struct mt792x_dev *dev, char *data)
+{
+	struct mt7925_mcu_eml_cap {
+		u8 rsv[4];
+		__le16 eml_cap;
+		u8 rsv2[6];
+	} __packed * cap;
+
+	cap = (struct mt7925_mcu_eml_cap *)data;
+
+	dev->phy.eml_cap = le16_to_cpu(cap->eml_cap);
+}
+
 static int
 mt7925_mcu_get_nic_capability(struct mt792x_dev *dev)
 {
@@ -805,6 +819,12 @@ mt7925_mcu_get_nic_capability(struct mt792x_dev *dev)
 		case MT_NIC_CAP_PHY:
 			mt7925_mcu_parse_phy_cap(dev, tlv->data);
 			break;
+		case MT_NIC_CAP_CHIP_CAP:
+			memcpy(&dev->phy.chip_cap, (void *)skb->data, sizeof(u64));
+			break;
+		case MT_NIC_CAP_EML_CAP:
+			mt7925_mcu_parse_eml_cap(dev, tlv->data);
+			break;
 		default:
 			break;
 		}

drivers/net/wireless/mediatek/mt76/mt7925/mt7925.h

@@ -235,6 +235,7 @@ void mt7925_queue_rx_skb(struct mt76_dev *mdev, enum mt76_rxq_id q,
 			 struct sk_buff *skb, u32 *info);
 void mt7925_stats_work(struct work_struct *work);
 void mt7925_set_stream_he_eht_caps(struct mt792x_phy *phy);
+int mt7925_init_mlo_caps(struct mt792x_phy *phy);
 int mt7925_init_debugfs(struct mt792x_dev *dev);
 
 int mt7925_mcu_set_beacon_filter(struct mt792x_dev *dev,

drivers/net/wireless/mediatek/mt76/mt792x.h

@@ -27,6 +27,7 @@
 
 #define MT792x_CHIP_CAP_CLC_EVT_EN BIT(0)
 #define MT792x_CHIP_CAP_RSSI_NOTIFY_EVT_EN BIT(1)
+#define MT792x_CHIP_CAP_MLO_EVT_EN BIT(2)
 
 /* NOTE: used to map mt76_rates. idx may change if firmware expands table */
 #define MT792x_BASIC_RATES_TBL	11
@@ -163,6 +164,7 @@ struct mt792x_phy {
 #endif
 	void *clc[MT792x_CLC_MAX_NUM];
 	u64 chip_cap;
+	u16 eml_cap;
 
 	struct work_struct roc_work;
 	struct timer_list roc_timer;