Re: Compiling testpmd with DPDK netvsc PMD

[David Marchand <david.marchand@redhat.com>]

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.


-- 
David Marchand