I am using dpdk 22.11 on CentOS 7.X on intel machine with two MLNX cards. They are recognized by DPDK by both vfio-pci and uio-generic. I compiled it using the instructions on 2. System Requirements — Data Plane Development Kit 23.03.0-rc1 documentation (dpdk.org)
The issue is when I run testpmd, it does not return any ethernet devices. Says No Probed Ethernet devices. 

 dpdk-testpmd -l 0-3 -n 4 -a 98:00.1 -- -i --nb-cores=2EAL: Detected CPU lcores: 72EAL: Detected NUMA nodes: 2EAL: Detected static linkage of DPDKEAL: Multi-process socket /var/run/dpdk/rte/mp_socketEAL: Selected IOVA mode 'VA'EAL: VFIO support initializedEAL: DPDK is running on a NUMA system, but is compiled without NUMA support.EAL: This will have adverse consequences for performance and usability.EAL: Please use --legacy-mem option, or recompile with NUMA support.TELEMETRY: No legacy callbacks, legacy socket not createdtestpmd: No probed ethernet devicesInteractive-mode selectedtestpmd: create a new mbuf pool <mb_pool_0>: n=171456, size=2176, socket=0testpmd: preferred mempool ops selected: ring_mp_mcDonetestpmd>

% dpdk-devbind.py -s
Network devices using DPDK-compatible driver============================================0000:4b:00.1 'MT2892 Family [ConnectX-6 Dx] 101d' drv=vfio-pci unused=mlx5_core0000:98:00.1 'MT28800 Family [ConnectX-5 Ex] 1019' drv=vfio-pci unused=mlx5_core
Network devices using kernel driver===================================0000:4b:00.0 'MT2892 Family [ConnectX-6 Dx] 101d' if=ens300f0 drv=mlx5_core unused=vfio-pci *Active*0000:98:00.0 'MT28800 Family [ConnectX-5 Ex] 1019' if=ens800f0 drv=mlx5_core unused=vfio-pci
No 'Baseband' devices detected==============================
No 'Crypto' devices detected============================
Other DMA devices=================0000:00:01.0 'Device 0b00' unused=vfio-pci0000:00:01.1 'Device 0b00' unused=vfio-pci0000:00:01.2 'Device 0b00' unused=vfio-pci0000:00:01.3 'Device 0b00' unused=vfio-pci0000:00:01.4 'Device 0b00' unused=vfio-pci0000:00:01.5 'Device 0b00' unused=vfio-pci0000:00:01.6 'Device 0b00' unused=vfio-pci0000:00:01.7 'Device 0b00' unused=vfio-pci0000:80:01.0 'Device 0b00' unused=vfio-pci0000:80:01.1 'Device 0b00' unused=vfio-pci0000:80:01.2 'Device 0b00' unused=vfio-pci0000:80:01.3 'Device 0b00' unused=vfio-pci0000:80:01.4 'Device 0b00' unused=vfio-pci0000:80:01.5 'Device 0b00' unused=vfio-pci0000:80:01.6 'Device 0b00' unused=vfio-pci0000:80:01.7 'Device 0b00' unused=vfio-pci
No 'Eventdev' devices detected==============================
No 'Mempool' devices detected=============================
No 'Compress' devices detected==============================
No 'Misc (rawdev)' devices detected===================================
No 'Regex' devices detected===========================