From: Rob Herring <robherring2@gmail.com>
To: linux-kernel@vger.kernel.org, netdev@vger.kernel.org
Cc: jonathan@jonmasters.org, eric.dumazet@gmail.com,
Mark Langsdorf <mark.langsdorf@calxeda.com>,
Rob Herring <rob.herring@calxeda.com>
Subject: [PATCH 1/6] net: calxedaxgmac: enable operate on 2nd frame mode
Date: Fri, 12 Oct 2012 10:15:03 -0500 [thread overview]
Message-ID: <1350054908-30646-2-git-send-email-robherring2@gmail.com> (raw)
In-Reply-To: <1350054908-30646-1-git-send-email-robherring2@gmail.com>
From: Rob Herring <rob.herring@calxeda.com>
Enable the tx dma to start reading the next frame while sending the current
frame.
Signed-off-by: Rob Herring <rob.herring@calxeda.com>
---
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 |
--
1.7.9.5
next prev parent reply other threads:[~2012-10-12 15:15 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-12 15:15 [PATCH 0/6] Calxeda xgmac performance fixes Rob Herring
2012-10-12 15:15 ` Rob Herring [this message]
2012-10-12 15:15 ` [PATCH 2/6] net: calxedaxgmac: remove explicit rx dma buffer polling Rob Herring
2012-10-12 15:15 ` [PATCH 3/6] net: calxedaxgmac: use relaxed i/o accessors in rx and tx paths Rob Herring
2012-10-12 15:15 ` [PATCH 4/6] net: calxedaxgmac: drop some unnecessary register writes Rob Herring
2012-10-12 15:15 ` [PATCH 5/6] net: calxedaxgmac: rework transmit ring handling Rob Herring
2012-10-12 16:28 ` Ben Hutchings
2012-10-12 17:01 ` Rob Herring
2012-10-12 18:04 ` [PATCH v2] " Rob Herring
2012-10-12 18:30 ` Eric Dumazet
2012-10-12 20:21 ` Rob Herring
2012-10-12 15:15 ` [PATCH 6/6] net: calxedaxgmac: ip align receive buffers Rob Herring
2012-10-29 17:52 ` [PATCH 0/6] Calxeda xgmac performance fixes Rob Herring
2012-10-29 18:06 ` David Miller
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