From: Sonic Zhang sonic.zhang@analog.com

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 sonic.zhang@analog.com ---

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 9ded895..51eff85 100644 --- a/drivers/net/designware.c +++ b/drivers/net/designware.c @@ -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", diff --git a/drivers/net/designware.h b/drivers/net/designware.h index ce51102..49d900c 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 */