Re: [Qemu-devel] PCI passthrough of 40G ethernet interface (Openstack/KVM)

[Stefan Assmann <sassmann@redhat.com>]

On 19.03.2015 15:04, jacob jacob wrote:
> Hi Stefan,
> have you been able to get PCI passthrough working without any issues
> after the upgrade?

My XL710 fails to transfer regular TCP traffic (netperf). If that works
for you then you're already one step ahead of me. Afraid I can't help
you there.

  Stefan

> Thanks
> Jacob
> 
> On Thu, Mar 19, 2015 at 4:15 AM, Stefan Assmann <sassmann@redhat.com> wrote:
>> On 18.03.2015 23:06, Shannon Nelson wrote:
>>> On Wed, Mar 18, 2015 at 3:01 PM, Shannon Nelson
>>> <shannon.nelson@intel.com> wrote:
>>>>
>>>>
>>>> On Wed, Mar 18, 2015 at 8:40 AM, jacob jacob <opstkusr@gmail.com> wrote:
>>>>>
>>>>> On Wed, Mar 18, 2015 at 11:24 AM, Bandan Das <bsd@redhat.com> wrote:
>>>>>>
>>>>>> Actually, Stefan suggests that support for this card is still sketchy
>>>>>> and your best bet is to try out net-next
>>>>>> http://git.kernel.org/cgit/linux/kernel/git/davem/net-next.git
>>>>>>
>>>>>> Also, could you please post more information about your hardware setup
>>>>>> (chipset/processor/firmware version on the card etc) ?
>>>>>
>>>>> Host CPU : Model name:            Intel(R) Xeon(R) CPU E5-2630 v2 @ 2.60GHz
>>>>>
>>>>> Manufacturer Part Number:  XL710QDA1BLK
>>>>> Ethernet controller: Intel Corporation Ethernet Controller XL710 for
>>>>> 40GbE QSFP+ (rev 01)
>>>>>  #ethtool -i enp9s0
>>>>> driver: i40e
>>>>> version: 1.2.6-k
>>>>> firmware-version: f4.22 a1.1 n04.24 e800013fd
>>>>> bus-info: 0000:09:00.0
>>>>> supports-statistics: yes
>>>>> supports-test: yes
>>>>> supports-eeprom-access: yes
>>>>> supports-register-dump: yes
>>>>> supports-priv-flags: no
>>>>>
>>>
>>> Jacob,
>>>
>>> It looks like you're using a NIC with the e800013fd firmware from last
>>> summer, and from a separate message that you saw these issues with
>>> both the 1.2.2-k and the 1.2.37 version drivers.  I suggest the next
>>> step would be to update the NIC firmware as there are some performance
>>> and stability updates available that deal with similar issues.  Please
>>> see the Intel Networking support webpage at
>>> https://downloadcenter.intel.com/download/24769 and look for the
>>> NVMUpdatePackage.zip.  This should take care of several of the things
>>> Stefan might describe as "sketchy" :-).
>>
>> Interesting, the following might explain why my XL710 feels a bit
>> sketchy then. ;-)
>> # ethtool -i p4p1
>> driver: i40e
>> version: 1.2.37-k
>> firmware-version: f4.22.26225 a1.1 n4.24 e12ef
>> Looks like the firmware on this NIC is even older.
>>
>> I tried to update the firmware with nvmupdate64e and the first thing I
>> noticed is that you cannot update the firmware even with todays linux
>> git. The tool errors out because it cannot access the NVM. Only with a
>> recent net-next kernel I was able to update the firmware.
>> ethtool -i p4p1
>> driver: i40e
>> version: 1.2.37-k
>> firmware-version: f4.33.31377 a1.2 n4.42 e1932
>>
>> However during the update I got a lot of errors in dmesg.
>> [  301.796664] i40e 0000:82:00.0: ARQ Error: Unknown event 0x0702 received
>> [  301.893933] i40e 0000:82:00.0: ARQ Error: Unknown event 0x0703 received
>> [  302.005223] i40e 0000:82:00.0: ARQ Error: Unknown event 0x0703 received
>> [...]
>> [  387.884635] i40e 0000:82:00.0: ARQ Error: Unknown event 0x0703 received
>> [  387.896862] i40e 0000:82:00.0: ARQ Overflow Error detected
>> [  387.902995] i40e 0000:82:00.0: ARQ Error: Unknown event 0x0703 received
>> [...]
>> [  391.583799] i40e 0000:82:00.0: NVMUpdate write failed err=-53 status=0x0 errno=-16 module=70 offset=0x0 size=2
>> [  391.714217] i40e 0000:82:00.0: NVMUpdate write failed err=-53 status=0x0 errno=-16 module=70 offset=0x0 size=2
>> [  391.842656] i40e 0000:82:00.0: NVMUpdate write failed err=-53 status=0x0 errno=-16 module=70 offset=0x0 size=2
>> [  391.973080] i40e 0000:82:00.0: NVMUpdate write failed err=-53 status=0x0 errno=-16 module=70 offset=0x0 size=2
>> [  392.107586] i40e 0000:82:00.0: NVMUpdate write failed err=-53 status=0x0 errno=-16 module=70 offset=0x0 size=2
>> [  392.244140] i40e 0000:82:00.0: NVMUpdate write failed err=-53 status=0x0 errno=-16 module=70 offset=0x0 size=2
>> [  392.373966] i40e 0000:82:00.0: ARQ Error: Unknown event 0x0703 received
>>
>> Not sure if that flash was actually successful or not.
>>
>>   Stefan