net: configure DWMAC DMA by default AXI burst length

PATCH Superseded Sonic Zhang 1 participant 1 message Jan 29, 2015 Network drivers

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Sonic Zhang

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2015-01-29 05:20 UTC #0 lore raw

PATCH v2 1/1 net: configure DWMAC DMA by default AXI burst length

From: Sonic Zhang <[email protected]>

Board can define its own AXI burst length to improve DWMAC DMA performance.

v2-changes:
- Avoid write burst len register when the Macro is not defined.

Signed-off-by Sonic Zhang <[email protected]>

---
 drivers/net/designware.c |    4 ++++
 1 file changed, 4 insertions(+)

drivers/net/designware.c +4 -0

index 9ded895..51eff85 100644
@@ -256,6 +256,10 @@ static int dw_eth_init(struct eth_device *dev, bd_t *bis)
 
 	writel(readl(&dma_p->opmode) | RXSTART | TXSTART, &dma_p->opmode);
 
+#ifdef CONFIG_DW_AXI_BURST_LEN
+	writel((CONFIG_DW_AXI_BURST_LEN & 0x1FF >> 1), &dma_p->axibus);
+#endif
+
 	/* Start up the PHY */
 	if (phy_startup(priv->phydev)) {
 		printf("Could not initialize PHY %s\n",

Signature · 1 line

1.7.9.5