[dpdk-dev] i40e_aq_get_phy_capabilities() fails when using SFP+ with no link

[Christos Ricudis]

Hi, 

> On 12 Jan 2017, at 21:55, Olivier MATZ <olivier.matz at 6wind.com> wrote:
> 
> Hi,
> 
> On Wed, 11 Jan 2017 20:51:58 +0000, "Rowden, Aaron F"
> <aaron.f.rowden at intel.com> wrote:
>> Hi Helin,
>> 
>> I'm checking on this to see why it could be failing but I don’t think
>> this is one part of formal validation. Intel modules are always what
>> is recommended.
>> 
>> Aaron
>> 
>>> Hi Helin, 
>>> 
>>>> On 11 Jan 2017, at 09:08, Zhang, Helin <helin.zhang at intel.com>
>>>> wrote:
>>>> 
>>>> Hi Aaron
>>>> 
>>>> Is the SFP+ (Finisar FTLX8571D3BCL) supported and validated by
>>>> Intel? It seems there is some PHY issue in this case.  
>>> 
>>> As the original reporter of this issue, I will test with validated
>>> SFP+s and will report on my testing. 
>>> 
>>> Shouldn’t unsupported SFP+s be blacklisted in the I40E driver? 
>>> 
> 
> Just to let you know that in my case the SFP are Intel ones.
> Maybe it's a different issue.
> 
> I see there are some i40e fixes in the net-next repo, I'll give a try
> with this version.
> 
> Regards,
> Olivier

After further testing, I can confirm that this issue persists with supported Intel SFPs (Intel FTLX8571D3BCV-IT). 

As for the changeset introducing this issue - we had failure reports with previous DPDK versions, probably related to LSE handling, but these weren’t properly investigated. The change in 16.11 which calls get_phy_capability too early in initialization stage might have alleviated the issue making it easier for us to detect and confirm. 

Best regards, 
Christos Ricudis.