On 13/02/18 23:53, Rosen Penev wrote:
Based on Qualcomm driver. Improves iperf3 throughput by ~20mbps on transmit on Archer C7v4.
this is missing the description of what the patch does. John
Signed-off-by: Rosen Penev <ros...@gmail.com> --- .../drivers/net/ethernet/atheros/ag71xx/ag71xx_main.c | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-) diff --git a/target/linux/ar71xx/files/drivers/net/ethernet/atheros/ag71xx/ag71xx_main.c b/target/linux/ar71xx/files/drivers/net/ethernet/atheros/ag71xx/ag71xx_main.c index 95682b7641..d32f220178 100644 --- a/target/linux/ar71xx/files/drivers/net/ethernet/atheros/ag71xx/ag71xx_main.c +++ b/target/linux/ar71xx/files/drivers/net/ethernet/atheros/ag71xx/ag71xx_main.c @@ -797,11 +797,14 @@ static netdev_tx_t ag71xx_hard_start_xmit(struct sk_buff *skb, if (ag71xx_has_ar8216(ag)) ag71xx_add_ar8216_header(ag, skb);- if (skb->len <= 4) {+ dma_cache_sync (NULL, skb->data, skb->len, DMA_TO_DEVICE); + + if (unlikely(skb->len <= 4)) { DBG("%s: packet len is too small\n", ag->dev->name); goto err_drop; }+ netdev_sent_queue(dev, skb->len);dma_addr = dma_map_single(&dev->dev, skb->data, skb->len, DMA_TO_DEVICE);@@ -817,27 +820,24 @@ static netdev_tx_t ag71xx_hard_start_xmit(struct sk_buff *skb,ring->buf[i].len = skb->len; ring->buf[i].skb = skb;- netdev_sent_queue(dev, skb->len);- skb_tx_timestamp(skb);desc->ctrl &= ~DESC_EMPTY;ring->curr += n;- /* flush descriptor */- wmb(); - ring_min = 2; if (ring->desc_split) ring_min *= AG71XX_TX_RING_DS_PER_PKT;- if (ring->curr - ring->dirty >= ring_size - ring_min) {+ if (unlikely(ring->curr - ring->dirty >= ring_size - ring_min)) { DBG("%s: tx queue full\n", dev->name); netif_stop_queue(dev); }DBG("%s: packet injected into TX queue\n", ag->dev->name); + /* flush descriptor */+ wmb(); /* enable TX engine */ ag71xx_wr(ag, AG71XX_REG_TX_CTRL, TX_CTRL_TXE);
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