Date: Wed, 23 Oct 2024 07:20:49 +0100 From: Lexi Winter <lexi@le-fay.org> To: freebsd-net@freebsd.org Subject: Chelsio / cxlv(4): strange messages, SR-IOV interface does not work Message-ID: <f2972877-4ec5-49f5-a335-99c28aab58a8@le-fay.org>
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hello,
i'm trying to configure a cxlv(4) device, which is a VF of a Chelsio
T540-CR on a host running bhyve.
host: FreeBSD 15.0-CURRENT #3 lf/main-n269068-2cff93ced1d: Wed Oct 23
02:48:20 BST 2024
guest: FreeBSD 15.0-CURRENT #2 lf/main-n269067-56dd459904b: Sat Oct 19
18:36:40 BST 2024
the VF appears correctly in the VM:
root@lily:~ # kldload if_cxlv
t5vf0: <Chelsio T540-CR VF> mem
0xc000e000-0xc000efff,0xc0000000-0xc0007fff,0xc0008000-0xc0009fff at
device 6.0 on pci0
t5vf0: 1 ports, 2 MSI-X interrupts, 4 eq, 2 iq
cxlv0: <port 0> on t5vf0
cxlv0: 2 txq, 1 rxq (NIC)
and after bringing the interface 'up' everything seems fine:
root@lily:~ # ifconfig cxlv0
cxlv0: flags=1008843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST,LOWER_UP>
metric 0 mtu 1500
options=6ec07bb<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSUM,TSO4,TSO6,LRO,VLAN_HWTSO,LINKSTATE,RXCSUM_IPV6,TXCSUM_IPV6,HWSTATS,HWRXTSTMP,MEXTPG>
ether 06:44:3f:e7:60:30
media: Ethernet 10Gbase-Twinax <full-duplex> (10Gbase-Twinax
<full-duplex,rxpause,txpause>)
status: active
nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
however, trying to assign an IP address causes immediate problems:
root@lily:~ # ifconfig cxlv0 inet6 2001:8b0:aab5:7::10/64
root@lily:~ # Oct 23 06:16:07 lily kernel: cxlv0: a looped back NS
message is detected during DAD for fe80:3::444:3fff:fee7:6030. Another
DAD probes are being sent.
root@lily:~ # dmesg|grep loop
cxlv0: a looped back NS message is detected during DAD for
fe80:3::444:3fff:fee7:6030. Another DAD probes are being sent.
cxlv0: a looped back NS message is detected during DAD for
fe80:3::444:3fff:fee7:6030. Another DAD probes are being sent.
cxlv0: a looped back NS message is detected during DAD for
fe80:3::444:3fff:fee7:6030. Another DAD probes are being sent.
cxlv0: a looped back NS message is detected during DAD for
fe80:3::444:3fff:fee7:6030. Another DAD probes are being sent.
cxlv0: a looped back NS message is detected during DAD for
fe80:3::444:3fff:fee7:6030. Another DAD probes are being sent.
cxlv0: a looped back NS message is detected during DAD for
fe80:3::444:3fff:fee7:6030. Another DAD probes are being sent.
cxlv0: a looped back NS message is detected during DAD for
fe80:3::444:3fff:fee7:6030. Another DAD probes are being sent.
i find this strange because the link local IP address in the kernel
error is not even configured on the interface:
root@lily:~ # ifconfig cxlv0
cxlv0: flags=1008843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST,LOWER_UP>
metric 0 mtu 1500
options=6ec07bb<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSUM,TSO4,TSO6,LRO,VLAN_HWTSO,LINKSTATE,RXCSUM_IPV6,TXCSUM_IPV6,HWSTATS,HWRXTSTMP,MEXTPG>
ether 06:44:3f:e7:60:30
inet6 2001:8b0:aab5:7::10/64
inet6 fe80::444:3fff:fee7:6030%cxlv0/64 tentative scopeid 0x3
media: Ethernet 10Gbase-Twinax <full-duplex> (10Gbase-Twinax
<full-duplex,rxpause,txpause>)
status: active
nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
am i doing something wrong here?
thanks, lexi.
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