[dpdk-dev] 82599 SR-IOV with passthrough

[jigsaw]

Hi Prashant,

I'm using CentOS 6 as both host and guest, which is managed by virsh.
A quite old kernel with latest ixgbe PF driver, plus DPDK trunk
version running in guest.

BTW, DPDK cannot take over ixgbe PF. At least not for now. For
instance the PF mailbox is not implemented in DPDK.

thx &
rgds,
-ql

On Thu, Oct 17, 2013 at 3:43 PM, jigsaw <jigsaw at gmail.com> wrote:
> Hi Prashant,
>
> I patched both Intel ixgbe PF driver and DPDK 1.5 VF driver, so that
> DPDK gets 4 queues in one VF. It works fine with all 4 Tx queues. The
> only trick is to set proper mac address for all outgoing packets,
> which must be the same mac as you set to the VF. This trick is
> described in the release note of DPDK.
>
> I wonder whether it makes sense to push this patch to DPDK. Any comments?
>
> thx &
> rgds,
> -ql
>
> On Thu, Oct 17, 2013 at 2:55 PM, Prashant Upadhyaya
> <prashant.upadhyaya at aricent.com> wrote:
>> Hi Qinglai,
>>
>> Why are you using the kernel driver at all.
>> Use the DPDK driver to control the PF on the host. The guest would communicate with the PF on host using mailbox as usual.
>> Then the changes will be limited to DPDK, isn't it ?
>>
>> Regards
>> -Prashant
>>
>> -----Original Message-----
>> From: dev [mailto:dev-bounces at dpdk.org] On Behalf Of jigsaw
>> Sent: Wednesday, October 16, 2013 6:51 PM
>> To: Thomas Monjalon
>> Cc: dev at dpdk.org
>> Subject: Re: [dpdk-dev] 82599 SR-IOV with passthrough
>>
>> Hi Thomas,
>>
>> Thanks for reply.
>>
>> The kernel has older version of PF than the one released on sf.net. So I'm checking the sf.net release.
>> If the change is limited in DPDK then it is controllable. But now it affects Intel's PF driver, I don't even know how to push the feature to Intel. The driver on sf.net is a read-only repository, isn't it? It would be painful to maintain another branch of 10G PF driver.
>> Could Intel give some advice or hints here?
>>
>> thx &
>> rgds,
>> -Qinglai
>>
>> On Wed, Oct 16, 2013 at 3:58 PM, Thomas Monjalon <thomas.monjalon at 6wind.com> wrote:
>>> 16/10/2013 14:18, jigsaw :
>>>> Therefore, to add support for multiple queues per VF, we have to at
>>>> least fix the PF driver, then add support in DPDK's VF driver.
>>>
>>> You're right, Linux PF driver have to be updated to properly manage
>>> multiple queues per VF. Then the guest can be tested with DPDK or with
>>> Linux driver (ixgbe_vf).
>>>
>>> Note that there are 2 versions of Linux driver for ixgbe: kernel.org
>>> and sourceforge.net (supporting many kernel versions).
>>>
>>> --
>>> Thomas
>>
>>
>>
>>
>> ===============================================================================
>> Please refer to http://www.aricent.com/legal/email_disclaimer.html
>> for important disclosures regarding this electronic communication.
>> ===============================================================================