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- disable ipv4 checksum offloading as it seems to have a problem.

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- add comments to describe it.
This commit is contained in:
yamt 2003-12-06 11:27:28 +00:00
parent d9c37aa325
commit 3b65e1745b
1 changed files with 13 additions and 7 deletions
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20
sys/dev/ic/i82557.c
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@ -1,4 +1,4 @@
/* $NetBSD: i82557.c,v 1.77 2003/11/02 11:07:45 wiz Exp $ */
/* $NetBSD: i82557.c,v 1.78 2003/12/06 11:27:28 yamt Exp $ */
/*-
* Copyright (c) 1997, 1998, 1999, 2001, 2002 The NetBSD Foundation, Inc.
@ -73,7 +73,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: i82557.c,v 1.77 2003/11/02 11:07:45 wiz Exp $");
__KERNEL_RCSID(0, "$NetBSD: i82557.c,v 1.78 2003/12/06 11:27:28 yamt Exp $");
#include "bpfilter.h"
#include "rnd.h"
@ -390,14 +390,20 @@ fxp_attach(struct fxp_softc *sc)
ifp->if_stop = fxp_stop;
IFQ_SET_READY(&ifp->if_snd);
/*
* XXX we should have separate IFCAP flags for transmit and receive.
* XXX it isn't problem for this paticular driver, though.
*/
if (sc->sc_flags & FXPF_IPCB) {
KASSERT(sc->sc_flags & FXPF_EXT_RFA); /* we have both or none */
/*
* IFCAP_CSUM_IPv4 seems to have a problem,
* at least, on i82550 rev.12.
* specifically, it doesn't calculate ipv4 checksum correctly
* when sending 20 byte ipv4 header + 1 or 2 byte data.
* FreeBSD driver has related comments.
*
* XXX we should have separate IFCAP flags
* for transmit and receive.
*/
ifp->if_capabilities =
IFCAP_CSUM_IPv4 | IFCAP_CSUM_TCPv4 | IFCAP_CSUM_UDPv4;
/*IFCAP_CSUM_IPv4 |*/ IFCAP_CSUM_TCPv4 | IFCAP_CSUM_UDPv4;
}
/*