From 1d304174106c93ce05f6088813ad7203b3eb381a Mon Sep 17 00:00:00 2001 From: Lorenzo Bianconi Date: Sat, 12 Oct 2024 11:01:11 +0200 Subject: [PATCH] net: airoha: Implement BQL support Introduce BQL support in the airoha_eth driver reporting to the kernel info about tx hw DMA queues in order to avoid bufferbloat and keep the latency small. Signed-off-by: Lorenzo Bianconi Link: https://patch.msgid.link/20241012-en7581-bql-v2-1-4deb4efdb60b@kernel.org Signed-off-by: Jakub Kicinski --- drivers/net/ethernet/mediatek/airoha_eth.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) --- a/drivers/net/ethernet/mediatek/airoha_eth.c +++ b/drivers/net/ethernet/mediatek/airoha_eth.c @@ -1710,9 +1710,11 @@ static int airoha_qdma_tx_napi_poll(stru WRITE_ONCE(desc->msg1, 0); if (skb) { + u16 queue = skb_get_queue_mapping(skb); struct netdev_queue *txq; - txq = netdev_get_tx_queue(skb->dev, qid); + txq = netdev_get_tx_queue(skb->dev, queue); + netdev_tx_completed_queue(txq, 1, skb->len); if (netif_tx_queue_stopped(txq) && q->ndesc - q->queued >= q->free_thr) netif_tx_wake_queue(txq); @@ -2488,7 +2490,9 @@ static netdev_tx_t airoha_dev_xmit(struc q->queued += i; skb_tx_timestamp(skb); - if (!netdev_xmit_more()) + netdev_tx_sent_queue(txq, skb->len); + + if (netif_xmit_stopped(txq) || !netdev_xmit_more()) airoha_qdma_rmw(qdma, REG_TX_CPU_IDX(qid), TX_RING_CPU_IDX_MASK, FIELD_PREP(TX_RING_CPU_IDX_MASK, q->head));