NVMe and SR-IOV, how to use together?

[Gruher, Joseph R]

It would be interesting to confirm the device really supports SR-IOV. At launch the device claimed it on paper but we were told firmware support had not been implemented. Do you have any support from the manufacturer to confirm the device HW/FW really supports SR-IOV today?


> On Sep 19, 2017, at 1:31 PM, Bogdan Rudas <brudas at exadel.com> wrote:
> 
> Hi!
> 
> I've checked the device on 4.14.0 rc1 kernel. And see no SR-IOV files
> for SSD PCI device in /sys/devices/..../sriov_*, SR-IOV works for
> Intel I350 LOM at the same host.
> However manufactures brochure claims the SR-IOV support for this
> series. Should I report this as a bug in Linux nvme driver? Is so,
> what the information should I gather?
> 
> Here is a brochure with SR-IOV mention:
> http://www.samsung.com/semiconductor/global/file/insight/2016/08/Samsung_PM1725a-1.pdf
> 
> Here is SSD information:
> root at ubuntu-test:~# nvme list
> Node             SN                   Model
>        Namespace Usage                      Format           FW Rev
> ---------------- --------------------
> ---------------------------------------- ---------
> -------------------------- ---------------- --------
> /dev/nvme0n1     S3HBNA0J600073       SAMSUNG MZPLL1T6HEHP-00003
>        1           1.60  TB /   1.60  TB    512   B +  0 B   GPNA4B3Q
> 
>> On Mon, Sep 18, 2017 at 9:41 PM, Keith Busch <keith.busch at intel.com> wrote:
>>> On Mon, Sep 18, 2017 at 09:20:16PM +0300, Bogdan Rudas wrote:
>>> I run kernel 4.4.27 which don't have a support for SR-IOV in NVMe
>>> driver, that's why I do not see a VFs in lspci output.
>> 
>> The driver has nothing to do with what lspci will output. If you don't
>> see the SR-IOV capability structure there, that means your drive doesn't
>> support it.
> 
> 
> 
> -- 
> Bogdan Rudas
> Director of IT Europe
> Exadel Inc.
> http://www.exadel.com/
> E-mail: brudas at exadel.com
> Skype ID: bogdan.rudas
> 
> -- 
> 
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