how to bind VF interface into dpdk

[David Marchand]

On Wed, Sep 14, 2022 at 2:30 PM Balakrishnan K
<Balakrishnan.K1 at tatacommunications.com> wrote:
>
>     I am trying to bind VF interface to dpdk using dpdk-devbind.py.
>
> Unable to bind getting error “cannot bind to driver uio_pci_generic”.
>
> Steps followed:
>
> 1.modprobe uio_pci_generic
>
> 2. dpdk-devbind.py -b uio_pci_generic 0000:05:00.0

In general, you should use vfio-pci.

Now, for your particular case, ixgbe VF devices (10ed) won't work with
uio_pci_generic, and it is reported in the driver info.

$ ./usertools/dpdk-pmdinfo.py build-gcc/drivers/librte_net_ixgbe.so | less
PMD NAME: net_ixgbe_vf
PMD PARAMETERS: pflink_fullchk=<0|1>
PMD KMOD DEPENDENCIES: * igb_uio | vfio-pci
PMD HW SUPPORT:
 Intel Corporation (8086) : 82599 Ethernet Controller Virtual Function
(10ed) (All Subdevices)
 Intel Corporation (8086) : 82599 Virtual Function (152e) (All Subdevices)
 Intel Corporation (8086) : X540 Ethernet Controller Virtual Function
(1515) (All Subdevices)
 Intel Corporation (8086) : X540 Virtual Function (1530) (All Subdevices)
 Intel Corporation (8086) : X550 Virtual Function (1564) (All Subdevices)
 Intel Corporation (8086) : X550 Virtual Function (1565) (All Subdevices)
 Intel Corporation (8086) : X553 Virtual Function (15c5) (All Subdevices)
 Intel Corporation (8086) : X553 Virtual Function (15b4) (All Subdevices)
 Intel Corporation (8086) : Ethernet Connection X552 Virtual Function
(15a8) (All Subdevices)
 Intel Corporation (8086) : X552 Virtual Function (15a9) (All Subdevices)

...


>
> Also tried with vfio-pci driver not succeeded.

We need dmesg output in this case, to be sure.

In general, it means that either your system has no iommu (there is a
special *unsafe* mode, for handling this case), or the iommu is not
configured.
Please see https://doc.dpdk.org/guides/linux_gsg/linux_drivers.html#vfio


-- 
David Marchand