Hi,

I am using DPDK successfully with an Intel x710 10G Controller, however I
am getting the error shown below when trying to use the older Intel x550T
controller in a similar manner.

I was able to find the following "workaround", however I'm not quite sure
how to apply this in practice in a standard ubuntu 22.04 LTS environment,
or if this is in fact the core issue.

30.4.5.3. Workaround
Do not bind the uio_pci_generic module in X550 NICs. Do not bind igb_uio
with legacy mode in X550 NICs. Before binding vfio with legacy mode in X550
NICs, use modprobe vfio `` ``nointxmask=1 to load vfio module if the intx
is not shared with other devices.

dpdk-devbind.py --unbind 0000:08:00.0
dpdk-devbind.py --bind=vfio-pci 0000:08:00.0
dpdk-devbind.py --status

0000:08:00.0 'Ethernet Controller 10G X550T 15d1' drv=vfio-pci unused=ixgbe


dpdk-testpmd

EAL: Detected 4 lcore(s)
EAL: Detected 1 NUMA nodes
EAL: Multi-process socket /var/run/dpdk/rte/mp_socket
EAL: Selcted IOVA mode 'PA'
EAL: No available hugepages reported in hugepages-1048576kB
EAL: Probing VIFO support…
EAL: VFIO support initialized
EAL: Failed to open group 0
EAL:  0000:08:00.0 not managed by VFIO driver, skipping
EAL: No legacy callbacks, legacy socket not created
testpmd: No probed ethernet devices
testpmd: create a new mbuf pool <mb_pool_0>: n=171756, size=2176, socket=0
testpmd: preferred mempool ops selected: ring_mp_mc
Done
No commandline core given, start packet forwarding
io packet forwarding - ports=0 - cores=0 - streams=0 - NUMA support
enabled, MP allocation mode: native

io packet forwarding packets/burst=32
Nb forwarding cores=1 - nb forwarding ports=0

Press enter to exit


Thank you in advance for your help!

Cheers,

Robert