mt76: only schedule txqs from the tx tasklet

Reduces lock contention from the tx path and improves performance

Signed-off-by: Felix Fietkau <nbd@nbd.name>

drivers/net/wireless/mediatek/mt76/dma.c

@@ -205,8 +205,6 @@ mt76_dma_tx_cleanup(struct mt76_dev *dev, enum mt76_txq_id qid, bool flush)
 
 	spin_unlock_bh(&q->lock);
 
-	if (!flush)
-		mt76_txq_schedule(dev, qid);
 	if (wake)
 		ieee80211_wake_queue(dev->hw, qid);
 }

drivers/net/wireless/mediatek/mt76/mt7603/dma.c

@@ -145,6 +145,8 @@ mt7603_tx_tasklet(unsigned long data)
 	for (i = MT_TXQ_MCU; i >= 0; i--)
 		mt76_queue_tx_cleanup(dev, i, false);
 
+	mt76_txq_schedule_all(&dev->mt76);
+
 	mt7603_irq_enable(dev, MT_INT_TX_DONE_ALL);
 }
 

drivers/net/wireless/mediatek/mt76/mt76x02_mmio.c

@@ -162,6 +162,9 @@ static void mt76x02_tx_tasklet(unsigned long data)
 		mt76_queue_tx_cleanup(dev, i, false);
 
 	mt76x02_mac_poll_tx_status(dev, false);
+
+	mt76_txq_schedule_all(&dev->mt76);
+
 	mt76x02_irq_enable(dev, MT_INT_TX_DONE_ALL);
 }
 

drivers/net/wireless/mediatek/mt76/tx.c

@@ -595,7 +595,7 @@ void mt76_wake_tx_queue(struct ieee80211_hw *hw, struct ieee80211_txq *txq)
 	if (!test_bit(MT76_STATE_RUNNING, &dev->state))
 		return;
 
-	mt76_txq_schedule(dev, txq->ac);
+	tasklet_schedule(&dev->tx_tasklet);
 }
 EXPORT_SYMBOL_GPL(mt76_wake_tx_queue);