From: Lorenzo Bianconi Date: Sat, 12 Oct 2024 09:01:11 +0000 (+0200) Subject: net: airoha: Implement BQL support X-Git-Tag: v6.13-rc1~135^2~314 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=1d304174106c93ce05f6088813ad7203b3eb381a;p=thirdparty%2Fkernel%2Flinux.git 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 --- diff --git a/drivers/net/ethernet/mediatek/airoha_eth.c b/drivers/net/ethernet/mediatek/airoha_eth.c index e037f725f6d35..836a957aad77b 100644 --- a/drivers/net/ethernet/mediatek/airoha_eth.c +++ b/drivers/net/ethernet/mediatek/airoha_eth.c @@ -1709,9 +1709,11 @@ static int airoha_qdma_tx_napi_poll(struct napi_struct *napi, int budget) 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); @@ -2487,7 +2489,9 @@ static netdev_tx_t airoha_dev_xmit(struct sk_buff *skb, 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));