[PATCH net-next 04/14] net: ethernet: mtk_eth_soc: use napi_consume_skb

From: Ilya Lipnitskiy
Date: Thu Apr 22 2021 - 00:10:26 EST


From: Felix Fietkau <nbd@xxxxxxxx>

Should improve performance, since it can use bulk free

Signed-off-by: Felix Fietkau <nbd@xxxxxxxx>
Signed-off-by: Ilya Lipnitskiy <ilya.lipnitskiy@xxxxxxxxx>
---
drivers/net/ethernet/mediatek/mtk_eth_soc.c | 19 ++++++++++++-------
1 file changed, 12 insertions(+), 7 deletions(-)

diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.c b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
index 07daa5de8bec..5cf64de3ddf8 100644
--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
@@ -858,7 +858,8 @@ static int txd_to_idx(struct mtk_tx_ring *ring, struct mtk_tx_dma *dma)
return ((void *)dma - (void *)ring->dma) / sizeof(*dma);
}

-static void mtk_tx_unmap(struct mtk_eth *eth, struct mtk_tx_buf *tx_buf)
+static void mtk_tx_unmap(struct mtk_eth *eth, struct mtk_tx_buf *tx_buf,
+ bool napi)
{
if (MTK_HAS_CAPS(eth->soc->caps, MTK_QDMA)) {
if (tx_buf->flags & MTK_TX_FLAGS_SINGLE0) {
@@ -890,8 +891,12 @@ static void mtk_tx_unmap(struct mtk_eth *eth, struct mtk_tx_buf *tx_buf)

tx_buf->flags = 0;
if (tx_buf->skb &&
- (tx_buf->skb != (struct sk_buff *)MTK_DMA_DUMMY_DESC))
- dev_kfree_skb_any(tx_buf->skb);
+ (tx_buf->skb != (struct sk_buff *)MTK_DMA_DUMMY_DESC)) {
+ if (napi)
+ napi_consume_skb(tx_buf->skb, napi);
+ else
+ dev_kfree_skb_any(tx_buf->skb);
+ }
tx_buf->skb = NULL;
}

@@ -1069,7 +1074,7 @@ static int mtk_tx_map(struct sk_buff *skb, struct net_device *dev,
tx_buf = mtk_desc_to_tx_buf(ring, itxd);

/* unmap dma */
- mtk_tx_unmap(eth, tx_buf);
+ mtk_tx_unmap(eth, tx_buf, false);

itxd->txd3 = TX_DMA_LS0 | TX_DMA_OWNER_CPU;
if (!MTK_HAS_CAPS(eth->soc->caps, MTK_QDMA))
@@ -1388,7 +1393,7 @@ static int mtk_poll_tx_qdma(struct mtk_eth *eth, int budget,
done[mac]++;
budget--;
}
- mtk_tx_unmap(eth, tx_buf);
+ mtk_tx_unmap(eth, tx_buf, true);

ring->last_free = desc;
atomic_inc(&ring->free_count);
@@ -1425,7 +1430,7 @@ static int mtk_poll_tx_pdma(struct mtk_eth *eth, int budget,
budget--;
}

- mtk_tx_unmap(eth, tx_buf);
+ mtk_tx_unmap(eth, tx_buf, true);

desc = &ring->dma[cpu];
ring->last_free = desc;
@@ -1627,7 +1632,7 @@ static void mtk_tx_clean(struct mtk_eth *eth)

if (ring->buf) {
for (i = 0; i < MTK_DMA_SIZE; i++)
- mtk_tx_unmap(eth, &ring->buf[i]);
+ mtk_tx_unmap(eth, &ring->buf[i], false);
kfree(ring->buf);
ring->buf = NULL;
}
--
2.31.1