From: Sonic Zhang sonic.zhang@analog.com
Board can define its own AXI burst length to improve DWMAC DMA performance.
Signed-off-by: Sonic Zhang sonic.zhang@analog.com ---
drivers/net/designware.c | 2 ++ drivers/net/designware.h | 5 +++++ 2 files changed, 7 insertions(+)
diff --git a/drivers/net/designware.c b/drivers/net/designware.c index 9ded895..d8d6792 100644 --- a/drivers/net/designware.c +++ b/drivers/net/designware.c @@ -256,6 +256,8 @@ static int dw_eth_init(struct eth_device *dev, bd_t *bis)
writel(readl(&dma_p->opmode) | RXSTART | TXSTART, &dma_p->opmode);
+ writel((CONFIG_DW_AXI_BURST_LEN & 0x1FF >> 1), &dma_p->axibus); + /* 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..d8bd84d 100644 --- a/drivers/net/designware.h +++ b/drivers/net/designware.h @@ -102,6 +102,11 @@ struct eth_dma_regs { #define TXSECONDFRAME (1 << 2) #define RXSTART (1 << 1)
+/* Default AXI BUS Burst length */ +#ifndef CONFIG_DW_AXI_BURST_LEN +#define CONFIG_DW_AXI_BURST_LEN 0 +#endif + /* Descriptior related definitions */ #define MAC_MAX_FRAME_SZ (1600)