From mboxrd@z Thu Jan 1 00:00:00 1970 From: Rob Herring Subject: [PATCH v3 1/6] net: calxedaxgmac: enable operate on 2nd frame mode Date: Mon, 5 Nov 2012 10:22:19 -0600 Message-ID: <1352132544-15809-2-git-send-email-robherring2@gmail.com> References: <1352132544-15809-1-git-send-email-robherring2@gmail.com> Cc: eric.dumazet@gmail.com, Rob Herring To: netdev@vger.kernel.org, davem@davemloft.net Return-path: Received: from mail-oa0-f46.google.com ([209.85.219.46]:49379 "EHLO mail-oa0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752592Ab2KEQWk (ORCPT ); Mon, 5 Nov 2012 11:22:40 -0500 Received: by mail-oa0-f46.google.com with SMTP id h16so5924901oag.19 for ; Mon, 05 Nov 2012 08:22:39 -0800 (PST) In-Reply-To: <1352132544-15809-1-git-send-email-robherring2@gmail.com> Sender: netdev-owner@vger.kernel.org List-ID: From: Rob Herring Enable the tx dma to start reading the next frame while sending the current frame. Signed-off-by: Rob Herring --- drivers/net/ethernet/calxeda/xgmac.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/net/ethernet/calxeda/xgmac.c b/drivers/net/ethernet/calxeda/xgmac.c index 16814b3..7f5fd17 100644 --- a/drivers/net/ethernet/calxeda/xgmac.c +++ b/drivers/net/ethernet/calxeda/xgmac.c @@ -191,6 +191,7 @@ #define DMA_CONTROL_ST 0x00002000 /* Start/Stop Transmission */ #define DMA_CONTROL_SR 0x00000002 /* Start/Stop Receive */ #define DMA_CONTROL_DFF 0x01000000 /* Disable flush of rx frames */ +#define DMA_CONTROL_OSF 0x00000004 /* Operate on 2nd tx frame */ /* DMA Normal interrupt */ #define DMA_INTR_ENA_NIE 0x00010000 /* Normal Summary */ @@ -965,8 +966,7 @@ static int xgmac_hw_init(struct net_device *dev) ctrl |= XGMAC_CONTROL_IPC; writel(ctrl, ioaddr + XGMAC_CONTROL); - value = DMA_CONTROL_DFF; - writel(value, ioaddr + XGMAC_DMA_CONTROL); + writel(DMA_CONTROL_DFF | DMA_CONTROL_OSF, ioaddr + XGMAC_DMA_CONTROL); /* Set the HW DMA mode and the COE */ writel(XGMAC_OMR_TSF | XGMAC_OMR_RFD | XGMAC_OMR_RFA | -- 1.7.10.4