svn commit: r235666 - stable/8/sys/dev/ixgbe
Bjoern A. Zeeb
bz at FreeBSD.org
Sat May 19 22:16:12 UTC 2012
Author: bz
Date: Sat May 19 22:16:12 2012
New Revision: 235666
URL: http://svn.freebsd.org/changeset/base/235666
Log:
MFC r234620:
If we pass down 64k - L2 hdr size + 1 to 64K L3+ data adding an ether
header will make the data go over the 64k limits announced to busdma as
maxsize and the transaction will fail.
With TSO this can result in a TCP regression due to the lost packet.
According to the data sheets ixgbe(4) 82598 and 82599 can handle up to
256k so increase the maximum.
Reported by: Jon Kåre Hellan, UNINETT (jon.kare.hellan uninett.no)
Tested by: Jon Kåre Hellan, UNINETT (jon.kare.hellan uninett.no)
Modified:
stable/8/sys/dev/ixgbe/ixgbe.h
Directory Properties:
stable/8/sys/ (props changed)
Modified: stable/8/sys/dev/ixgbe/ixgbe.h
==============================================================================
--- stable/8/sys/dev/ixgbe/ixgbe.h Sat May 19 21:56:26 2012 (r235665)
+++ stable/8/sys/dev/ixgbe/ixgbe.h Sat May 19 22:16:12 2012 (r235666)
@@ -179,7 +179,7 @@
#define IXGBE_82599_SCATTER 32
#define MSIX_82598_BAR 3
#define MSIX_82599_BAR 4
-#define IXGBE_TSO_SIZE 65535
+#define IXGBE_TSO_SIZE 262140
#define IXGBE_TX_BUFFER_SIZE ((u32) 1514)
#define IXGBE_RX_HDR 128
#define IXGBE_VFTA_SIZE 128
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