linux-kernel - [PATCH net-next v2 3/6] bcm63xx_enet: add xmit

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Message-Id: <20201224142421.32350-4-liew.s.piaw@gmail.com>
Date:   Thu, 24 Dec 2020 22:24:18 +0800
From:   Sieng Piaw Liew <liew.s.piaw@...il.com>
To:     Florian Fainelli <f.fainelli@...il.com>
Cc:     bcm-kernel-feedback-list@...adcom.com,
        Sieng Piaw Liew <liew.s.piaw@...il.com>,
        netdev@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH net-next v2 3/6] bcm63xx_enet: add xmit_more support

Support bulking hardware TX queue by using netdev_xmit_more().

Signed-off-by: Sieng Piaw Liew <liew.s.piaw@...il.com>
---
 drivers/net/ethernet/broadcom/bcm63xx_enet.c | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/broadcom/bcm63xx_enet.c b/drivers/net/ethernet/broadcom/bcm63xx_enet.c
index 90f8214b4d22..452968f168ed 100644
--- a/drivers/net/ethernet/broadcom/bcm63xx_enet.c
+++ b/drivers/net/ethernet/broadcom/bcm63xx_enet.c
@@ -633,14 +633,17 @@ bcm_enet_start_xmit(struct sk_buff *skb, struct net_device *dev)
 
 	netdev_sent_queue(dev, skb->len);
 
-	/* kick tx dma */
-	enet_dmac_writel(priv, priv->dma_chan_en_mask,
-				 ENETDMAC_CHANCFG, priv->tx_chan);
-
 	/* stop queue if no more desc available */
 	if (!priv->tx_desc_count)
 		netif_stop_queue(dev);
 
+	/* kick tx dma */
+        if (!netdev_xmit_more() || !priv->tx_desc_count)
+                enet_dmac_writel(priv, priv->dma_chan_en_mask,
+                                 ENETDMAC_CHANCFG, priv->tx_chan);
+
+
+
 	dev->stats.tx_bytes += skb->len;
 	dev->stats.tx_packets++;
 	ret = NETDEV_TX_OK;
-- 
2.17.1