13/11/2024 21:10, CJ Sculti:
> I've been running my application for years on igb_uio with Intel NICs. I
> recently replaced them with a Mellanox ConnectX-5 2x 40gbps NIC, updated
> the DPDK version my application uses, and compiled with support for mlx5
> PMDs. Both 40Gbps ports are up with link, and both are in Ethernet mode,
> not Infiniband mode. However, I'm getting complaints when I start my
> application about trying to load 'mlx5_eth'? Both are bound to mlx5_core
> driver at the moment. When I bind them to vfio-pci, or uio_pci_generic, my
> application fails to recognize them at all as valid DPDK devices. Anyone
> have any ideas? Also, strange that it only complains about one? I have them
> configured in a bond on the kernel, as my application requires that.

You must not bind mlx5 devices with VFIO.
I recommend reading documentation.
You can start here:
https://doc.dpdk.org/guides/linux_gsg/linux_drivers.html#bifurcated-driver
then
https://doc.dpdk.org/guides/platform/mlx5.html#design