Re: Compiling testpmd with DPDK netvsc PMD

[Stephen Hemminger <stephen@networkplumber.org>]

On Mon, 10 Jun 2024 09:50:42 +0200
David Marchand <david.marchand@redhat.com> wrote:

> Hello,
> 
> On Sat, Jun 8, 2024 at 1:32 AM Nandini Rangaswamy
> <nandini.rangaswamy@broadcom.com> wrote:
> > Thanks for your email. I inspected meson build output and do see that netvsc is in the list of enabled drivers.
> > ===============
> > Drivers Enabled
> > ===============
> >
> > common:
> >         iavf, mlx5, qat,
> > bus:
> >         auxiliary, pci, vdev, vmbus,
> > mempool:
> >         bucket, ring, stack,
> > dma:
> >
> > net:
> >         af_packet, bond, e1000, ena, failsafe, gve, i40e, iavf,
> >         ice, igc, ixgbe, kni, mlx5, netvsc, ring, tap,
> >         vdev_netvsc, vhost, virtio, vmxnet3,  
> 
> Ok, so the driver seems indeed part of this build, yet it was not
> functional at runtime?
> Could you confirm this driver was indeed embeeded in (*statically*
> linked) testpmd?
> $ ./usertools/dpdk-pmdinfo.py build/app/dpdk-testpmd | grep -i vsc
>     "name": "net_netvsc",
>     "name": "net_vdev_netvsc",
> 
> 
> >
> > Also, i changed the meson.build default_library=shared from static and it worked.  
> 
> Mm, the fact that changing link mode fixes the issue points at a link issue.
> 
> There is a bug with old pkg-config tool (<= 0.27 iirc) that does not
> process correctly dpdk .pc (for static link).
> It is worth checking which version of pkgconf is used in openwrt.
> 
> 

Does the openwrt kernel include the uio_hv_generic driver?
Did you bind the network device to uio_hv_generic as described in the
documentation: https://doc.dpdk.org/guides/nics/netvsc.html