From 2ddaf13bd28d9d9450831e84e30d617d2f49f1bd Mon Sep 17 00:00:00 2001 From: Sonic Zhang Date: Thu, 29 Jan 2015 13:37:31 +0800 Subject: [PATCH] net: configure DWMAC DMA by default AXI burst length 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. v3-changes: - Add axi_bus register member to struct eth_dma_regs. Signed-off-by: Sonic Zhang Acked-by: Joe Hershberger --- drivers/net/designware.c | 4 ++++ drivers/net/designware.h | 4 +++- 2 files changed, 7 insertions(+), 1 deletion(-) diff --git a/drivers/net/designware.c b/drivers/net/designware.c index c03e935e2f..7469e59d49 100644 --- a/drivers/net/designware.c +++ b/drivers/net/designware.c @@ -258,6 +258,10 @@ 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", diff --git a/drivers/net/designware.h b/drivers/net/designware.h index ce51102052..49d900cb3f 100644 --- a/drivers/net/designware.h +++ b/drivers/net/designware.h @@ -68,7 +68,9 @@ struct eth_dma_regs { u32 status; /* 0x14 */ u32 opmode; /* 0x18 */ u32 intenable; /* 0x1c */ - u8 reserved[40]; + u32 reserved1[2]; + u32 axibus; /* 0x28 */ + u32 reserved2[7]; u32 currhosttxdesc; /* 0x48 */ u32 currhostrxdesc; /* 0x4c */ u32 currhosttxbuffaddr; /* 0x50 */ -- 2.39.5