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