linux-kernel - [PATCH net-next v3 3/7] bcm63xx_enet: add xmit

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Date:   Wed,  6 Jan 2021 22:42:04 +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 v3 3/7] 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 | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/broadcom/bcm63xx_enet.c b/drivers/net/ethernet/broadcom/bcm63xx_enet.c
index 90f8214b4d22..21744dae30ce 100644
--- a/drivers/net/ethernet/broadcom/bcm63xx_enet.c
+++ b/drivers/net/ethernet/broadcom/bcm63xx_enet.c
@@ -634,7 +634,8 @@ 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,
+	if (!netdev_xmit_more() || !priv->tx_desc_count)
+		enet_dmac_writel(priv, priv->dma_chan_en_mask,
 				 ENETDMAC_CHANCFG, priv->tx_chan);
 
 	/* stop queue if no more desc available */
-- 
2.17.1