netdev - Re: [Intel-wired-lan] SRIOV on Intel x710 fail to get attached both at VM creation time and VM runtime

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Message-ID: <20180302072123.t5afapjnrnzppmen@w541.fritz.box>
Date:   Fri, 2 Mar 2018 08:21:23 +0100
From:   Stefan Assmann <sassmann@...hat.com>
To:     Alexander Duyck <alexander.duyck@...il.com>
Cc:     poza@...eaurora.org, Sinan Kaya <okaya@...eaurora.org>,
        Netdev <netdev@...r.kernel.org>,
        intel-wired-lan <intel-wired-lan@...ts.osuosl.org>
Subject: Re: [Intel-wired-lan] SRIOV on Intel x710 fail to get attached both
 at VM creation time and VM runtime

On 2018-03-01 19:40, Alexander Duyck wrote:
> On Thu, Mar 1, 2018 at 8:12 AM,  <poza@...eaurora.org> wrote:
> > + intel-wired-lan@...ts.osuosl.org
> >
> >
> > On 2018-03-01 21:41, poza@...eaurora.org wrote:
> >>
> >> Hi All,
> >>
> >> I am facing the following issue on kernel 4.14.14.
> >>
> >> Enable SRIOV on Intel x710 card.
> >> echo 32 > /sys/class/net/eth1/device/sriov_numvfs
> >> start net_pool
> >> virsh net-start intel_pool
> >>
> >> case 1)
> >> attach the VF while creatig VM:
> >> virt-install --accelerate --import --disk /home/disk.img --network
> >> network=intel_pool  --boot uefi --name poza-guest --os-type linux
> >> --os-variant rhel7 --ram 8000 --vcpus 4
> >>
> >> case 2)
> >> create VM:
> >> virt-install --accelerate --import --disk /home/disk.img --boot uefi
> >> --name poza-guest --os-type linux --os-variant rhel7 --ram 8000
> >> --vcpus 4
> >> attach it:
> >> virsh attach-interface --domain oza-guest --type network --source
> >> intel_pool --target eth1
> >>
> >> kernel logs:
> >> [44287.825287] i40evf 0000:01:02.0: Unable to send opcode 2 to PF, err
> >> I40E_ERR_QUEUE_EMPTY, aq_err OK
> >> [44287.962640] i40e 0000:01:00.0: VF 0 still in reset. Try again.
> >> error: Failed to attach interface
> >> error: Cannot set interface MAC/vlanid to 52:54:00:e9:f1:b5/0 for
> >> ifname eth1 vf 0: Resource temporarily unavailable
> >>
> >>
> >> The same use case works with following card with the same kernel
> >> version and rootfs.
> >> Ethernet controller: Mellanox Technologies MT27710 Family [ConnectX-4 Lx]
> >>
> >> for details logs please have a look at
> >> https://bugzilla.kernel.org/show_bug.cgi?id=198959
> >>
> >> Regards,
> >> Oza.
> 
> So the first question that jumps to mind is what is the firmware
> version on the PF, ethtool -i should tell you. Are there any issues
> bringing up the PF and getting it to pass traffic?

There's a patch on Intel-wired-lan titled "i40e: Fix attach VF to VM
issue" which should fix the problem. It's not upstream yet.

As a workaround you could unload/blacklist the i40evf driver in the
host.

  Stefan