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enable Rx checkum offload (i.e. skip) for xen netback; it works well

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as long as netfront in DomU is configured to fill the checksum

documentation will be updated to recommend how the flags should be setup
on each side of the xennet(4)/xvif(4) pair
This commit is contained in:
jdolecek 2020-04-04 14:45:37 +00:00
parent 06d11bb0d0
commit 3c3cd44a0c
1 changed files with 7 additions and 7 deletions
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14
sys/arch/xen/xen/xennetback_xenbus.c
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@ -1,4 +1,4 @@
/* $NetBSD: xennetback_xenbus.c,v 1.90 2020/03/30 19:07:32 jdolecek Exp $ */
/* $NetBSD: xennetback_xenbus.c,v 1.91 2020/04/04 14:45:37 jdolecek Exp $ */
/*
* Copyright (c) 2006 Manuel Bouyer.
@ -25,7 +25,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: xennetback_xenbus.c,v 1.90 2020/03/30 19:07:32 jdolecek Exp $");
__KERNEL_RCSID(0, "$NetBSD: xennetback_xenbus.c,v 1.91 2020/04/04 14:45:37 jdolecek Exp $");
#include "opt_xen.h"
@ -287,11 +287,11 @@ xennetback_xenbus_create(struct xenbus_device *xbusd)
ifp->if_snd.ifq_maxlen =
uimax(ifqmaxlen, NET_TX_RING_SIZE * 2);
ifp->if_capabilities =
IFCAP_CSUM_IPv4_Tx
| IFCAP_CSUM_UDPv4_Tx
| IFCAP_CSUM_TCPv4_Tx
| IFCAP_CSUM_UDPv6_Tx
| IFCAP_CSUM_TCPv6_Tx;
IFCAP_CSUM_IPv4_Rx | IFCAP_CSUM_IPv4_Tx
| IFCAP_CSUM_UDPv4_Rx | IFCAP_CSUM_UDPv4_Tx
| IFCAP_CSUM_TCPv4_Rx | IFCAP_CSUM_TCPv4_Tx
| IFCAP_CSUM_UDPv6_Rx | IFCAP_CSUM_UDPv6_Tx
| IFCAP_CSUM_TCPv6_Rx | IFCAP_CSUM_TCPv6_Tx;
#define XN_M_CSUM_SUPPORTED ( \
M_CSUM_TCPv4 | M_CSUM_UDPv4 | M_CSUM_IPv4 \
| M_CSUM_TCPv6 | M_CSUM_UDPv6 \