wifi: mt76: mt7915: rework tx packets counting when WED is active

PPDU TxS can only report MPDU count whereas mac80211 requires MSDU scale
(NL80211_STA_INFO_TX_PACKETS), so switch to get MSDU counts from WA
statistic.

Note that mt7915 WA firmware only counts tx_packet for WED path, so driver
needs to take care of host path additionally.

Fixes: 43eaa3689507 ("wifi: mt76: add PPDU based TxS support for WED device")
Co-developed-by: Ryder Lee <ryder.lee@mediatek.com>
Signed-off-by: Ryder Lee <ryder.lee@mediatek.com>
Signed-off-by: Peter Chiu <chui-hao.chiu@mediatek.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>

1 files changed, 67 insertions, 7 deletions

diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c b/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c
index 088a065e37d5..8da9c87e9804 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c
@@ -164,7 +164,9 @@ mt7915_mcu_parse_response(struct mt76_dev *mdev, int cmd,
 	}
 
 	rxd = (struct mt76_connac2_mcu_rxd *)skb->data;
-	if (seq != rxd->seq)
+	if (seq != rxd->seq &&
+	    !(rxd->eid == MCU_CMD_EXT_CID &&
+	      rxd->ext_eid == MCU_EXT_EVENT_WA_TX_STAT))
 		return -EAGAIN;
 
 	if (cmd == MCU_CMD(PATCH_SEM_CONTROL)) {
@@ -395,12 +397,14 @@ void mt7915_mcu_rx_event(struct mt7915_dev *dev, struct sk_buff *skb)
 	struct mt76_connac2_mcu_rxd *rxd;
 
 	rxd = (struct mt76_connac2_mcu_rxd *)skb->data;
-	if (rxd->ext_eid == MCU_EXT_EVENT_THERMAL_PROTECT ||
-	    rxd->ext_eid == MCU_EXT_EVENT_FW_LOG_2_HOST ||
-	    rxd->ext_eid == MCU_EXT_EVENT_ASSERT_DUMP ||
-	    rxd->ext_eid == MCU_EXT_EVENT_PS_SYNC ||
-	    rxd->ext_eid == MCU_EXT_EVENT_BCC_NOTIFY ||
-	    !rxd->seq)
+	if ((rxd->ext_eid == MCU_EXT_EVENT_THERMAL_PROTECT ||
+	     rxd->ext_eid == MCU_EXT_EVENT_FW_LOG_2_HOST ||
+	     rxd->ext_eid == MCU_EXT_EVENT_ASSERT_DUMP ||
+	     rxd->ext_eid == MCU_EXT_EVENT_PS_SYNC ||
+	     rxd->ext_eid == MCU_EXT_EVENT_BCC_NOTIFY ||
+	     !rxd->seq) &&
+	     !(rxd->eid == MCU_CMD_EXT_CID &&
+	       rxd->ext_eid == MCU_EXT_EVENT_WA_TX_STAT))
 		mt7915_mcu_rx_unsolicited_event(dev, skb);
 	else
 		mt76_mcu_rx_event(&dev->mt76, skb);
@@ -3733,6 +3737,62 @@ int mt7915_mcu_twt_agrt_update(struct mt7915_dev *dev,
 				 &req, sizeof(req), true);
 }
 
+int mt7915_mcu_wed_wa_tx_stats(struct mt7915_dev *dev, u16 wlan_idx)
+{
+	struct {
+		__le32 cmd;
+		__le32 num;
+		__le32 __rsv;
+		__le16 wlan_idx;
+	} req = {
+		.cmd = cpu_to_le32(0x15),
+		.num = cpu_to_le32(1),
+		.wlan_idx = cpu_to_le16(wlan_idx),
+	};
+	struct mt7915_mcu_wa_tx_stat {
+		__le16 wlan_idx;
+		u8 __rsv[2];
+
+		/* tx_bytes is deprecated since WA byte counter uses u32,
+		 * which easily leads to overflow.
+		 */
+		__le32 tx_bytes;
+		__le32 tx_packets;
+	} *res;
+	struct mt76_wcid *wcid;
+	struct sk_buff *skb;
+	int ret;
+
+	ret = mt76_mcu_send_and_get_msg(&dev->mt76, MCU_WA_PARAM_CMD(QUERY),
+					&req, sizeof(req), true, &skb);
+	if (ret)
+		return ret;
+
+	if (!is_mt7915(&dev->mt76))
+		skb_pull(skb, 4);
+
+	res = (struct mt7915_mcu_wa_tx_stat *)skb->data;
+
+	if (le16_to_cpu(res->wlan_idx) != wlan_idx) {
+		ret = -EINVAL;
+		goto out;
+	}
+
+	rcu_read_lock();
+
+	wcid = rcu_dereference(dev->mt76.wcid[wlan_idx]);
+	if (wcid)
+		wcid->stats.tx_packets += le32_to_cpu(res->tx_packets);
+	else
+		ret = -EINVAL;
+
+	rcu_read_unlock();
+out:
+	dev_kfree_skb(skb);
+
+	return ret;
+}
+
 int mt7915_mcu_rf_regval(struct mt7915_dev *dev, u32 regidx, u32 *val, bool set)
 {
 	struct {