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agula's avatar
agula
Icon for Occasional Contributor rankOccasional Contributor
5 years ago

PCIe SRIOV VF capabilities

Hi, When using virtual functions on the Arria 10 device , I notice that the virtual functions do not have the same maximum read size and maximum payload size as the physical function. Is there a wa...
Deshi_Intel's avatar
Deshi_Intel
Icon for Regular Contributor rankRegular Contributor
5 years ago

HI,


I don't have any other suggestion for you except following.


I forgot to ask you whether you changed the value in address 0x078 of PF or VF.

  • I assume is VF ?


Device control register should be RW register and not RO register. Only device capability register is RO.

  • Unless the VF register value is carry forward from PF and can't be edited directly
  • Can you try to change the PF 0x078 to see if it bring any changes to VF ?
  • If it still doesn't work then likely this is capability limit of VF


Regards,

dlim




  • Deshi_Intel's avatar
    Deshi_Intel
    Icon for Regular Contributor rankRegular Contributor
    5 years ago

    HI,

    After some digging, I managed to find out about PCIe SRIOV spec as per attached pic