commit d309a46e42542223946d3a9e4e239fdc945cb53e
author Matt Carlson <mcarlson@broadcom.com> Thu Sep 30 10:34:31 2010 +0000
committer David S. Miller <davem@davemloft.net> Fri Oct 01 00:24:42 2010 -0700
tree 43fae359546e61d0bda67d903d03db11d227033c
parent 66cfd1bd05a7a1c31c9cdbb2ddf5c57d1cddc5f6

tg3: 5719: Prevent tx data corruption

This patch enables a bit that prevents read DMA overflows and adjusts
the txmbuf margin from the hardware default.  The combination of these
modifications prevents a tx data corruption issue we were seeing on the
5719.

Signed-off-by: Matt Carlson <mcarlson@broadcom.com>
Reviewed-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/tg3.h

diff --git a/drivers/net/tg3.h b/drivers/net/tg3.h
index 44733e4..ec62f05 100644
--- a/drivers/net/tg3.h
+++ b/drivers/net/tg3.h
@@ -1225,6 +1225,7 @@
 #define  BUFMGR_MODE_ATTN_ENABLE	 0x00000004
 #define  BUFMGR_MODE_BM_TEST		 0x00000008
 #define  BUFMGR_MODE_MBLOW_ATTN_ENAB	 0x00000010
+#define  BUFMGR_MODE_NO_TX_UNDERRUN	 0x80000000
 #define BUFMGR_STATUS			0x00004404
 #define  BUFMGR_STATUS_ERROR		 0x00000004
 #define  BUFMGR_STATUS_MBLOW		 0x00000010
@@ -1306,7 +1307,12 @@
 
 #define TG3_RDMA_RSRVCTRL_REG		0x00004900
 #define TG3_RDMA_RSRVCTRL_FIFO_OFLW_FIX	 0x00000004
-/* 0x4904 --> 0x4c00 unused */
+/* 0x4904 --> 0x4910 unused */
+
+#define TG3_LSO_RD_DMA_CRPTEN_CTRL	0x00004910
+#define TG3_LSO_RD_DMA_CRPTEN_CTRL_BLEN_BD_4K	 0x00030000
+#define TG3_LSO_RD_DMA_CRPTEN_CTRL_BLEN_LSO_4K	 0x000c0000
+/* 0x4914 --> 0x4c00 unused */
 
 /* Write DMA control registers */
 #define WDMAC_MODE			0x00004c00