netdev - [PATCH 1/1] myri10ge: write as 2 32-byte blocks in myri10ge_submit

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Date:	Mon, 04 Dec 2006 11:33:31 +0100
From:	Brice Goglin <brice@...i.com>
To:	Jeff Garzik <jeff@...zik.org>
CC:	netdev@...r.kernel.org
Subject: [PATCH 1/1] myri10ge: write as 2 32-byte blocks in myri10ge_submit_8rx

In the myri10ge_submit_8rx() routine, write the 64 byte request block as
2 32-byte blocks so that it is handled by the hardware pio write handler
if write-combining is enabled.

Signed-off-by: Brice Goglin <brice@...i.com>
---
 drivers/net/myri10ge/myri10ge.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

Index: linux-2.6.19/drivers/net/myri10ge/myri10ge.c
===================================================================
--- linux-2.6.19.orig/drivers/net/myri10ge/myri10ge.c	2006-11-29 22:57:37.000000000 +0100
+++ linux-2.6.19/drivers/net/myri10ge/myri10ge.c	2006-12-04 11:22:48.000000000 +0100
@@ -790,7 +790,9 @@
 
 	low = src->addr_low;
 	src->addr_low = DMA_32BIT_MASK;
-	myri10ge_pio_copy(dst, src, 8 * sizeof(*src));
+	myri10ge_pio_copy(dst, src, 4 * sizeof(*src));
+	mb();
+	myri10ge_pio_copy(dst + 4, src + 4, 4 * sizeof(*src));
 	mb();
 	src->addr_low = low;
 	__raw_writel(low, &dst->addr_low);


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