mt76: mt7915: add MU-MIMO support

Enable MU-MIMO DL/UL and add relative counters in debugfs.

Currently MU modules read WTBL first to notify BA changes to
other cross modules, so adjust mt7915_mcu_sta_ba() accordingly.
Tested-by: Evelyn Tsai <evelyn.tsai@mediatek.com>
Signed-off-by: Ryder Lee <ryder.lee@mediatek.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>

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

@@ -178,7 +178,14 @@ mt7915_txbf_stat_read_phy(struct mt7915_phy *phy, struct seq_file *s)
 	seq_printf(s, "Tx Beamformee feedback triggered counts: %ld\n",
 		   FIELD_GET(MT_ETBF_TX_FB_TRI, cnt));
 
-	/* Tx SU counters */
+	/* Tx SU & MU counters */
+	cnt = mt76_rr(dev, MT_MIB_SDR34(ext_phy));
+	seq_printf(s, "Tx multi-user Beamforming counts: %ld\n",
+		   FIELD_GET(MT_MIB_MU_BF_TX_CNT, cnt));
+	cnt = mt76_rr(dev, MT_MIB_DR8(ext_phy));
+	seq_printf(s, "Tx multi-user MPDU counts: %d\n", cnt);
+	cnt = mt76_rr(dev, MT_MIB_DR9(ext_phy));
+	seq_printf(s, "Tx multi-user successful MPDU counts: %d\n", cnt);
 	cnt = mt76_rr(dev, MT_MIB_DR11(ext_phy));
 	seq_printf(s, "Tx single-user successful MPDU counts: %d\n", cnt);
 

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

@@ -1166,19 +1166,31 @@ mt7915_mcu_sta_ba(struct mt7915_dev *dev,
 	struct wtbl_req_hdr *wtbl_hdr;
 	struct tlv *sta_wtbl;
 	struct sk_buff *skb;
+	int ret;
 
 	skb = mt7915_mcu_alloc_sta_req(dev, mvif, msta,
 				       MT7915_STA_UPDATE_MAX_SIZE);
 	if (IS_ERR(skb))
 		return PTR_ERR(skb);
 
-	mt7915_mcu_sta_ba_tlv(skb, params, enable, tx);
 	sta_wtbl = mt7915_mcu_add_tlv(skb, STA_REC_WTBL, sizeof(struct tlv));
 
 	wtbl_hdr = mt7915_mcu_alloc_wtbl_req(dev, msta, WTBL_SET, sta_wtbl,
 					     &skb);
 	mt7915_mcu_wtbl_ba_tlv(skb, params, enable, tx, sta_wtbl, wtbl_hdr);
 
+	ret = __mt76_mcu_skb_send_msg(&dev->mt76, skb,
+				      MCU_EXT_CMD_STA_REC_UPDATE, true);
+	if (ret)
+		return ret;
+
+	skb = mt7915_mcu_alloc_sta_req(dev, mvif, msta,
+				       MT7915_STA_UPDATE_MAX_SIZE);
+	if (IS_ERR(skb))
+		return PTR_ERR(skb);
+
+	mt7915_mcu_sta_ba_tlv(skb, params, enable, tx);
+
 	return __mt76_mcu_skb_send_msg(&dev->mt76, skb,
 				       MCU_EXT_CMD_STA_REC_UPDATE, true);
 }
@@ -1466,16 +1478,39 @@ mt7915_mcu_sta_muru_tlv(struct sk_buff *skb, struct ieee80211_sta *sta)
 		HE_PHY(CAP2_UL_MU_PARTIAL_MU_MIMO, elem->phy_cap_info[2]);
 }
 
+static int
+mt7915_mcu_add_mu(struct mt7915_dev *dev, struct ieee80211_vif *vif,
+		  struct ieee80211_sta *sta)
+{
+	struct mt7915_vif *mvif = (struct mt7915_vif *)vif->drv_priv;
+	struct mt7915_sta *msta = (struct mt7915_sta *)sta->drv_priv;
+	struct sk_buff *skb;
+	int len = sizeof(struct sta_req_hdr) + sizeof(struct sta_rec_muru);
+
+	if (!sta->vht_cap.vht_supported && !sta->he_cap.has_he)
+		return 0;
+
+	skb = mt7915_mcu_alloc_sta_req(dev, mvif, msta, len);
+	if (IS_ERR(skb))
+		return PTR_ERR(skb);
+
+	/* starec muru */
+	mt7915_mcu_sta_muru_tlv(skb, sta);
+
+	return __mt76_mcu_skb_send_msg(&dev->mt76, skb,
+				       MCU_EXT_CMD_STA_REC_UPDATE, true);
+}
+
 static void
 mt7915_mcu_sta_tlv(struct mt7915_dev *dev, struct sk_buff *skb,
 		   struct ieee80211_sta *sta)
 {
 	struct tlv *tlv;
 
+	/* starec ht */
 	if (sta->ht_cap.ht_supported) {
 		struct sta_rec_ht *ht;
 
-		/* starec ht */
 		tlv = mt7915_mcu_add_tlv(skb, STA_REC_HT, sizeof(*ht));
 		ht = (struct sta_rec_ht *)tlv;
 		ht->ht_cap = cpu_to_le16(sta->ht_cap.cap);
@@ -1495,10 +1530,6 @@ mt7915_mcu_sta_tlv(struct mt7915_dev *dev, struct sk_buff *skb,
 	/* starec he */
 	if (sta->he_cap.has_he)
 		mt7915_mcu_sta_he_tlv(skb, sta);
-
-	/* starec muru */
-	if (sta->he_cap.has_he || sta->vht_cap.vht_supported)
-		mt7915_mcu_sta_muru_tlv(skb, sta);
 }
 
 static void
@@ -2064,6 +2095,32 @@ int mt7915_mcu_add_rate_ctrl(struct mt7915_dev *dev, struct ieee80211_vif *vif,
 				       MCU_EXT_CMD_STA_REC_UPDATE, true);
 }
 
+static int
+mt7915_mcu_add_group(struct mt7915_dev *dev, struct ieee80211_vif *vif,
+		     struct ieee80211_sta *sta)
+{
+#define MT_STA_BSS_GROUP		1
+	struct mt7915_vif *mvif = (struct mt7915_vif *)vif->drv_priv;
+	struct mt7915_sta *msta = (struct mt7915_sta *)sta->drv_priv;
+	struct {
+		__le32 action;
+		u8 wlan_idx_lo;
+		u8 status;
+		u8 wlan_idx_hi;
+		u8 rsv0[5];
+		__le32 val;
+		u8 rsv1[8];
+	} __packed req = {
+		.action = cpu_to_le32(MT_STA_BSS_GROUP),
+		.wlan_idx_lo = to_wcid_lo(msta->wcid.idx),
+		.wlan_idx_hi = to_wcid_hi(msta->wcid.idx),
+		.val = cpu_to_le32(mvif->idx),
+	};
+
+	return __mt76_mcu_send_msg(&dev->mt76, MCU_EXT_CMD_SET_DRR_CTRL,
+				   &req, sizeof(req), true);
+}
+
 int mt7915_mcu_add_sta_adv(struct mt7915_dev *dev, struct ieee80211_vif *vif,
 			   struct ieee80211_sta *sta, bool enable)
 {
@@ -2073,10 +2130,18 @@ int mt7915_mcu_add_sta_adv(struct mt7915_dev *dev, struct ieee80211_vif *vif,
 		return 0;
 
 	/* must keep the order */
+	ret = mt7915_mcu_add_group(dev, vif, sta);
+	if (ret)
+		return ret;
+
 	ret = mt7915_mcu_add_txbf(dev, vif, sta, enable);
 	if (ret)
 		return ret;
 
+	ret = mt7915_mcu_add_mu(dev, vif, sta);
+	if (ret)
+		return ret;
+
 	if (enable)
 		return mt7915_mcu_add_rate_ctrl(dev, vif, sta);
 

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

@@ -201,6 +201,7 @@ enum {
 	MCU_EXT_CMD_EDCA_UPDATE = 0x27,
 	MCU_EXT_CMD_DEV_INFO_UPDATE = 0x2A,
 	MCU_EXT_CMD_THERMAL_CTRL = 0x2c,
+	MCU_EXT_CMD_SET_DRR_CTRL = 0x36,
 	MCU_EXT_CMD_SET_RDD_CTRL = 0x3a,
 	MCU_EXT_CMD_PROTECT_CTRL = 0x3e,
 	MCU_EXT_CMD_MAC_INIT_CTRL = 0x46,
@@ -653,7 +654,7 @@ struct sta_rec_muru {
 		bool ofdma_ul_en;
 		bool mimo_dl_en;
 		bool mimo_ul_en;
-		bool rsv[4];
+		u8 rsv[4];
 	} cfg;
 
 	struct {
@@ -664,7 +665,7 @@ struct sta_rec_muru {
 		bool lt16_sigb;
 		bool rx_su_comp_sigb;
 		bool rx_su_non_comp_sigb;
-		bool rsv;
+		u8 rsv;
 	} ofdma_dl;
 
 	struct {
@@ -951,7 +952,6 @@ enum {
 					 sizeof(struct sta_rec_ba) +	\
 					 sizeof(struct sta_rec_vht) +	\
 					 sizeof(struct tlv) +		\
-					 sizeof(struct sta_rec_muru) +	\
 					 MT7915_WTBL_UPDATE_MAX_SIZE)
 
 #define MT7915_WTBL_UPDATE_BA_SIZE	(sizeof(struct wtbl_req_hdr) +	\

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

@@ -117,11 +117,16 @@
 #define MT_MIB_SDR16(_band)		MT_WF_MIB(_band, 0x048)
 #define MT_MIB_SDR16_BUSY_MASK		GENMASK(23, 0)
 
+#define MT_MIB_SDR34(_band)		MT_WF_MIB(_band, 0x090)
+#define MT_MIB_MU_BF_TX_CNT		GENMASK(15, 0)
+
 #define MT_MIB_SDR36(_band)		MT_WF_MIB(_band, 0x098)
 #define MT_MIB_SDR36_TXTIME_MASK	GENMASK(23, 0)
 #define MT_MIB_SDR37(_band)		MT_WF_MIB(_band, 0x09c)
 #define MT_MIB_SDR37_RXTIME_MASK	GENMASK(23, 0)
 
+#define MT_MIB_DR8(_band)		MT_WF_MIB(_band, 0x0c0)
+#define MT_MIB_DR9(_band)		MT_WF_MIB(_band, 0x0c4)
 #define MT_MIB_DR11(_band)		MT_WF_MIB(_band, 0x0cc)
 
 #define MT_MIB_MB_SDR0(_band, n)	MT_WF_MIB(_band, 0x100 + ((n) << 4))