Date: Sun, 01 Dec 2013 20:10:15 -0800 From: Colin Percival <cperciva@freebsd.org> To: "freebsd-xen@freebsd.org" <freebsd-xen@FreeBSD.org>, jfv@freebsd.org Subject: Is ixgbe usable with SR-IOV? Message-ID: <529C0827.4020003@freebsd.org>
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Hi Xen people & jfv, Amazon's new "C3" instance type has support for SR-IOV using ixgbe hardware; our driver looks like it should support this, but when I turn it on it doesn't seem to work. Boot dmesg: http://pastebin.com/1Kkpfzbi The virtual hardware is recognized: > ix0: <Intel(R) PRO/10GbE Virtual Function Network Driver, Version - 1.1.4> mem 0xf3000000-0xf3003fff,0xf3004000-0xf3007fff at device 3.0 on pci0 > ix0: Using MSIX interrupts with 2 vectors > ix0: Ethernet address: 02:91:23:76:38:77 And we seem to be able to send packets, but never see any responses: > ix0: link state changed to UP > Starting Network: lo0 ix0. > lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> metric 0 mtu 16384 > options=600003<RXCSUM,TXCSUM,RXCSUM_IPV6,TXCSUM_IPV6> > inet6 ::1 prefixlen 128 > inet6 fe80::1%lo0 prefixlen 64 scopeid 0x2 > inet 127.0.0.1 netmask 0xff000000 > nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL> > ix0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500 > options=401bb<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSUM,TSO4,VLAN_HWTSO> > ether 02:91:23:76:38:77 > nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL> > media: Ethernet autoselect > status: active > Starting devd. > Starting dhclient. > DHCPDISCOVER on ix0 to 255.255.255.255 port 67 interval 8 > DHCPDISCOVER on ix0 to 255.255.255.255 port 67 interval 12 > DHCPDISCOVER on ix0 to 255.255.255.255 port 67 interval 12 > DHCPDISCOVER on ix0 to 255.255.255.255 port 67 interval 9 > DHCPDISCOVER on ix0 to 255.255.255.255 port 67 interval 10 > DHCPDISCOVER on ix0 to 255.255.255.255 port 67 interval 10 > No DHCPOFFERS received. Under exactly the same Xen configuration except with SR-IOV turned off and EC2 presenting a Xen netback to us instead, the DHCP works just fine. Has anyone managed to use {FreeBSD, SR-IOV, ixgbe, Xen}? Was any magic necessary in order to make it work? -- Colin Percival Security Officer Emeritus, FreeBSD | The power to serve Founder, Tarsnap | www.tarsnap.com | Online backups for the truly paranoid
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