From 79bfb73319098bc4cb701139a6677dcdec99182f Mon Sep 17 00:00:00 2001
From: Sieng Piaw Liew <liew.s.piaw@gmail.com>
Date: Tue, 3 Nov 2020 08:14:35 +0800
Subject: [PATCH 2/2] bcm63xx: support xmit_more in BQL

Support bulking hardware TX queue by using xmit_more.

Signed-off-by: Sieng Piaw Liew <liew.s.piaw@gmail.com>
---
 bcm63xx_enet.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

--- a/drivers/net/ethernet/broadcom/bcm63xx_enet.c
+++ b/drivers/net/ethernet/broadcom/bcm63xx_enet.c
@@ -638,14 +638,16 @@ bcm_enet_start_xmit(struct sk_buff *skb,
 
 	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;
@@ -2713,7 +2715,7 @@ static int bcm_enetsw_probe(struct platf
 	priv->irq_rx = irq_rx;
 	priv->irq_tx = irq_tx;
 	priv->rx_ring_size = BCMENET_DEF_RX_DESC;
-	priv->tx_ring_size = BCMENET_DEF_TX_DESC;
+	priv->tx_ring_size = BCMENETSW_DEF_TX_DESC;
 	priv->dma_maxburst = BCMENETSW_DMA_MAXBURST;
 
 	pd = dev_get_platdata(&pdev->dev);
--- a/drivers/net/ethernet/broadcom/bcm63xx_enet.h
+++ b/drivers/net/ethernet/broadcom/bcm63xx_enet.h
@@ -15,6 +15,7 @@
 /* default number of descriptor */
 #define BCMENET_DEF_RX_DESC	64
 #define BCMENET_DEF_TX_DESC	32
+#define BCMENETSW_DEF_TX_DESC	48
 
 /* maximum burst len for dma (4 bytes unit) */
 #define BCMENET_DMA_MAXBURST	16
