Commit 4c59b0f5 authored by Sieng Piaw Liew's avatar Sieng Piaw Liew Committed by Jakub Kicinski
Browse files

bcm63xx_enet: add BQL support 



Add Byte Queue Limits support to reduce/remove bufferbloat in
bcm63xx_enet.

Signed-off-by: default avatarSieng Piaw Liew <liew.s.piaw@gmail.com>
Acked-by: default avatarFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent 9cbfea02

drivers/net/ethernet/broadcom/bcm63xx_enet.c

+9 −0
Original line number Diff line number Diff line
@@ -417,9 +417,11 @@ static int bcm_enet_receive_queue(struct net_device *dev, int budget) 
static int bcm_enet_tx_reclaim(struct net_device *dev, int force)

{

	struct bcm_enet_priv *priv;

	unsigned int bytes;

	int released;



	priv = netdev_priv(dev);

	bytes = 0;

	released = 0;



	while (priv->tx_desc_count < priv->tx_ring_size) {
@@ -456,10 +458,13 @@ static int bcm_enet_tx_reclaim(struct net_device *dev, int force) 
		if (desc->len_stat & DMADESC_UNDER_MASK)

			dev->stats.tx_errors++;



		bytes += skb->len;

		dev_kfree_skb(skb);

		released++;

	}



	netdev_completed_queue(dev, released, bytes);



	if (netif_queue_stopped(dev) && released)

		netif_wake_queue(dev);
@@ -626,6 +631,8 @@ bcm_enet_start_xmit(struct sk_buff *skb, struct net_device *dev) 
	desc->len_stat = len_stat;

	wmb();



	netdev_sent_queue(dev, skb->len);



	/* kick tx dma */

	enet_dmac_writel(priv, priv->dma_chan_en_mask,

				 ENETDMAC_CHANCFG, priv->tx_chan);
@@ -1169,6 +1176,7 @@ static int bcm_enet_stop(struct net_device *dev) 
	kdev = &priv->pdev->dev;



	netif_stop_queue(dev);

	netdev_reset_queue(dev);

	napi_disable(&priv->napi);

	if (priv->has_phy)

		phy_stop(dev->phydev);
@@ -2338,6 +2346,7 @@ static int bcm_enetsw_stop(struct net_device *dev) 


	del_timer_sync(&priv->swphy_poll);

	netif_stop_queue(dev);

	netdev_reset_queue(dev);

	napi_disable(&priv->napi);

	del_timer_sync(&priv->rx_timeout);