Date: Mon, 20 Mar 2006 22:17:21 +0100 From: Joerg Wunsch <j@uriah.heep.sax.de> To: freebsd-sparc64@freebsd.org Subject: hme(4) broken on non-sparc64 systems in -current Message-ID: <20060320211720.GB31216@uriah.heep.sax.de>
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Even though this problem is not related to sparc64 system (I hope, the
least), I think all those who know about hme(4) are listening here.
I used to run a PCI QFE card in my (i386) scratch machine at home, for
various experiments. After upgrading the machine from a 6-stable of
about a year ago to -current, the QFE ceased to work. The symptoms
were that I could still ping anyone (even with large packets), but all
TCP and UDP traffic seemingly didn't ``arrive'' at the IP stack, even
though the packets made it into the NIC at the lowest level (so
tcpdump could still display them).
This made me suspect the TCP/UDP checksum offloading, and indeed,
after uncommenting the checksum capability:
Index: if_hme.c
===================================================================
RCS file: /home/ncvs/src/sys/dev/hme/if_hme.c,v
retrieving revision 1.46
diff -u -r1.46 if_hme.c
--- if_hme.c 17 Jan 2006 06:02:22 -0000 1.46
+++ if_hme.c 20 Mar 2006 20:56:54 -0000
@@ -340,9 +340,9 @@
* Tell the upper layer(s) we support long frames/checksum offloads.
*/
ifp->if_data.ifi_hdrlen = sizeof(struct ether_vlan_header);
- ifp->if_capabilities |= IFCAP_VLAN_MTU | IFCAP_HWCSUM;
+ ifp->if_capabilities |= IFCAP_VLAN_MTU /* | IFCAP_HWCSUM */;
ifp->if_hwassist |= sc->sc_csum_features;
- ifp->if_capenable |= IFCAP_VLAN_MTU | IFCAP_HWCSUM;
+ ifp->if_capenable |= IFCAP_VLAN_MTU /* | IFCAP_HWCSUM */;
return (0);
fail_txdesc:
everything works again. If anyone has any further ideas what might
have broken this, I'm all ears, otherwise I might start digging down
into the code myself.
(I don't have a FreeBSD-sparc64 machine running -current around, so I
cannot test right now whether it would work there.)
--
cheers, J"org .-.-. --... ...-- -.. . DL8DTL
http://www.sax.de/~joerg/ NIC: JW11-RIPE
Never trust an operating system you don't have sources for. ;-)
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