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bcm63xx: add BQL support

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Add Byte Queue Limits support to reduce/remove bufferbloat in bcm63xx target.

Signed-off-by: Sieng Piaw Liew <liew.s.piaw@gmail.com>
[Amend commit description]
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
This commit is contained in:
Sieng Piaw Liew 2020-11-13 02:20:30 +08:00 committed by Álvaro Fernández Rojas
parent 33c27ccf4a
commit 342524895c
1 changed files with 67 additions and 0 deletions
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67
target/linux/bcm63xx/patches-5.4/442-bcm63xx_enet-add_bql_support.patch Normal file
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@ -0,0 +1,67 @@
From 3c0e8e1259d223a1493c47f7e277d05b93909b6b Mon Sep 17 00:00:00 2001
From: Sieng Piaw Liew <liew.s.piaw@gmail.com>
Date: Mon, 2 Nov 2020 11:34:06 +0800
Subject: [PATCH 1/2] bcm63xx: add BQL support
Add Byte Queue Limits support to reduce/remove bufferbloat in bcm63xx target.
Signed-off-by: Sieng Piaw Liew <liew.s.piaw@gmail.com>
---
bcm63xx_enet.c | 11 +++++++++++
1 file changed, 11 insertions(+)
--- a/drivers/net/ethernet/broadcom/bcm63xx_enet.c
+++ b/drivers/net/ethernet/broadcom/bcm63xx_enet.c
@@ -423,9 +423,11 @@ static int bcm_enet_tx_reclaim(struct ne
{
struct bcm_enet_priv *priv;
int released;
+ unsigned int bytes;
priv = netdev_priv(dev);
released = 0;
+ bytes = 0;
while (priv->tx_desc_count < priv->tx_ring_size) {
struct bcm_enet_desc *desc;
@@ -461,10 +463,13 @@ static int bcm_enet_tx_reclaim(struct ne
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);
@@ -631,6 +636,8 @@ bcm_enet_start_xmit(struct sk_buff *skb,
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);
@@ -1051,6 +1058,8 @@ static int bcm_enet_open(struct net_devi
else
bcm_enet_adjust_link(dev);
+ netdev_reset_queue(dev);
+
netif_start_queue(dev);
return 0;
@@ -2281,6 +2290,8 @@ static int bcm_enetsw_open(struct net_de
enet_dmac_writel(priv, ENETDMAC_IR_PKTDONE_MASK,
ENETDMAC_IRMASK, priv->tx_chan);
+ netdev_reset_queue(dev);
+
netif_carrier_on(dev);
netif_start_queue(dev);