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

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Date:	Thu, 19 Mar 2015 09:15:47 +0100
From:	Stefan Assmann <sassmann@...hat.com>
To:	Shannon Nelson <shannon.nelson@...el.com>,
	jacob jacob <opstkusr@...il.com>
CC:	Bandan Das <bsd@...hat.com>,
	Alex Williamson <alex.williamson@...hat.com>,
	QEMU Developers <qemu-devel@...gnu.org>,
	kvm-devel <kvm@...r.kernel.org>, netdev@...r.kernel.org
Subject: Re: [Qemu-devel] PCI passthrough of 40G ethernet interface (Openstack/KVM)

On 18.03.2015 23:06, Shannon Nelson wrote:
> On Wed, Mar 18, 2015 at 3:01 PM, Shannon Nelson
> <shannon.nelson@...el.com> wrote:
>>
>>
>> On Wed, Mar 18, 2015 at 8:40 AM, jacob jacob <opstkusr@...il.com> wrote:
>>>
>>> On Wed, Mar 18, 2015 at 11:24 AM, Bandan Das <bsd@...hat.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
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