Re: [dpdk-users] Cannot attach DPDK NIC port to OVS

[Shivaram Mysore <shivaram.mysore@gmail.com>]

You should look at emails from -(Hint:  search DPDK in subject)

https://mail.openvswitch.org/pipermail/ovs-discuss/2017-March/thread.html
https://mail.openvswitch.org/pipermail/ovs-discuss/2017-April/thread.html
https://mail.openvswitch.org/pipermail/ovs-discuss/2017-April/044155.html

If possible, I would recommend using Ubuntu 17.04 with OVS 2.7 with DPDK
packages from http://packages.wand.net.nz/ which can simplify your
deployment.

/Shivaram

On Fri, Apr 14, 2017 at 4:04 AM, Vincenzo Maffione <
vincenzo.maffione@ing.unipi.it> wrote:

> Hi,
>   I would like to attach one of my ixgbe NIC ports to an OpenVSwitch
> instance, but I keep getting an unexpected error, see below.
>
> I've successfully bound both my ixgbe NIC ports to DPDK, using VFIO:
>
> # tools/dpdk-devbind.py --status
>
> Network devices using DPDK-compatible driver
> ============================================
> 0000:01:00.0 '82599ES 10-Gigabit SFI/SFP+ Network Connection' drv=vfio-pci
> unused=ixgbe
> 0000:01:00.1 '82599ES 10-Gigabit SFI/SFP+ Network Connection' drv=vfio-pci
> unused=ixgbe
>
> Network devices using kernel driver
> ===================================
> 0000:00:19.0 'Ethernet Connection (2) I218-V' if=eno1 drv=e1000e
> unused=vfio-pci
> 0000:06:00.0 'RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller'
> if=enp6s0 drv=r8169 unused=vfio-pci
> 0000:07:00.0 '82574L Gigabit Network Connection' if=enp7s0 drv=e1000e
> unused=vfio-pci
>
> Other network devices
> =====================
> <none>
>
> Crypto devices using DPDK-compatible driver
> ===========================================
> <none>
>
> Crypto devices using kernel driver
> ==================================
> <none>
>
> Other crypto devices
> ====================
> <none>
>
>
> Then I created a bridge
>
> # ovs-vsctl add-br obr1 -- set bridge obr1 datapath_type=netdev
>
> But then when trying to add the dpdk NIC:
>
> # ovs-vsctl add-port obr1 dpdk-p0 -- set Interface dpdk-p0 type=dpdk
> options:dpdk-devargs=0000:01:00.0
>
> the command fails, and I get this in the log:
>
> ovs-vswitchd[353]: 2017-04-14T10:54:06Z|00026|bridge|WARN|could not open
> network device dpdk-p0 (No such device)
> ovs-vswitchd[353]: ovs|00026|bridge|WARN|could not open network device
> dpdk-p0 (No such device)
>
> Note that I've successfully managed to setup an OVS instance with two DPDK
> vhost-user ports (each one assigned to a QEMU VM): this is why I'm
> confident my OVS is built and configured correctly to work with DPDK. Also,
> DPDK by itself is working as expected, I can use dpdk pktgen.
> Moreover, OVS log shows that DPDK is recognized
>
> [...]
> ovs|00005|dpdk|INFO|DPDK Enabled, initializing
> [...]
>
> Note that I'm carefully following the documentation here
> http://docs.openvswitch.org/en/latest/intro/install/dpdk/ and here
> http://docs.openvswitch.org/en/latest/howto/dpdk/
>
> More info:
>
> DPDK version: 16.11
> OVS version: 2.6.1, configured with --with-dpdk
> Host: Archlinux
> /proc/cmdline: BOOT_IMAGE=../vmlinuz-linux-vfio
> root=UUID=1c777330-3f00-4ab8-8d5d-d4b2b5d860b0 rw intel_iommu=on
> hugepages=2048 pci=assign-busses pcie_acs_override=downstream
> initrd=../initramfs-linux-vfio.img
>
> Can anybody help? I'm at a loss here.
>
> Thanks,
>   Vincenzo
>