net: calxedaxgmac: enable rx cut-thru mode

Enabling RX cut-thru mode yields better performance as received frames
start getting written to memory before a whole frame is received.

Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/calxeda/xgmac.c b/drivers/net/ethernet/calxeda/xgmac.c
index abb8f40ec2212520e3c64e7a9c0d410ffa9225b9..2b4b4f529ab4db6627f558ff16f0059d216f7ddb 100644 (file)
--- a/drivers/net/ethernet/calxeda/xgmac.c
+++ b/drivers/net/ethernet/calxeda/xgmac.c
@@ -264,7 +264,7 @@
 #define XGMAC_OMR_FEF          0x00000080      /* Forward Error Frames */
 #define XGMAC_OMR_DT           0x00000040      /* Drop TCP/IP csum Errors */
 #define XGMAC_OMR_RSF          0x00000020      /* RX FIFO Store and Forward */
-#define XGMAC_OMR_RTC          0x00000010      /* RX Threshhold Ctrl */
+#define XGMAC_OMR_RTC_256      0x00000018      /* RX Threshhold Ctrl */
 #define XGMAC_OMR_RTC_MASK     0x00000018      /* RX Threshhold Ctrl MASK */
 
 /* XGMAC HW Features Register */
@@ -982,7 +982,8 @@ static int xgmac_hw_init(struct net_device *dev)
        writel(value, ioaddr + XGMAC_DMA_CONTROL);
 
        /* Set the HW DMA mode and the COE */
-       writel(XGMAC_OMR_TSF | XGMAC_OMR_RSF | XGMAC_OMR_RFD | XGMAC_OMR_RFA,
+       writel(XGMAC_OMR_TSF | XGMAC_OMR_RFD | XGMAC_OMR_RFA |
+               XGMAC_OMR_RTC_256,
                ioaddr + XGMAC_OMR);
 
        /* Reset the MMC counters */