mlx5_common: No Verbs device matches PCI device 0000:01:00.1

[Erez Ferber]

Hi,

Based on your output, the ConnectX-4LX device is configured in LAG mode
managed via the kernel bonding scripts. In this mode, both physical
functions share a single port (mlx5_bond_0). You should only probe the
first PCI BDF - 01:00.0, not the 2nd one.

By the way, the --dpdk installation flag should not be necessary, it is an
old flag keps for Mellanox OFED builds lower than 5.x.

Regards,
Erez

On Tue, 5 Apr 2022 at 19:17, fwefew 4t4tg <7532yahoo at gmail.com> wrote:

> I built the current version of DPDK directly from dpdk.org after I
> installed the current OFED Mellanox driver set:
>
> * MLNX_OFED_LINUX-5.5-1.0.3.2-ubuntu20.04-x86_64.iso
>
> with ./install --dpdk
>
> I am using a Mellanox Technologies MT27710 Family [ConnectX-4 Lx] which is
> Ethernet only; there is no IB mode for this NIC. This is a MT_2420110034
> board. However, when I run dpdk-testpmd I see "No Verbs device matches PCI
> device 0000:01:00.1, are kernel drivers loaded?"
>
> EAL: Detected CPU lcores: 16
> EAL: Detected NUMA nodes: 1
> EAL: Detected static linkage of DPDK
> EAL: Selected IOVA mode 'PA'
> EAL: No free 2048 kB hugepages reported on node 0
> EAL: VFIO support initialized
> EAL: Probe PCI driver: mlx5_pci (15b3:1015) device: 0000:01:00.1 (socket 0)
> mlx5_common: No Verbs device matches PCI device 0000:01:00.1, are kernel
> drivers loaded?
> mlx5_common: Verbs device not found: 01:00.1
> mlx5_common: Failed to initialize device context.
> EAL: Requested device 0000:01:00.1 cannot be used
> EAL: Bus (pci) probe failed.
>
> As far as I can see all the kernel modules are loaded:
>
> lsmod | egrep "(ib|mlx)" | sort
> ib_cm                  53248  2 rdma_cm,ib_ipoib
> ib_core               368640  8
> rdma_cm,ib_ipoib,iw_cm,ib_umad,rdma_ucm,ib_uverbs,mlx5_ib,ib_cm
> ib_ipoib              135168  0
> ib_umad                24576  0
> ib_uverbs             139264  2 rdma_ucm,mlx5_ib
> libahci                36864  1 ahci
> libcrc32c              16384  2 btrfs,raid456
> mlx5_core            1634304  1 mlx5_ib
> mlx5_ib               397312  0
> mlx_compat             69632  11
> rdma_cm,ib_ipoib,mlxdevm,iw_cm,ib_umad,ib_core,rdma_ucm,ib_uverbs,mlx5_ib,ib_cm,mlx5_core
> mlxdevm               172032  1 mlx5_core
> mlxfw                  32768  1 mlx5_core
> pci_hyperv_intf        16384  1 mlx5_core
> psample                20480  1 mlx5_core
> tls                    94208  2 bonding,mlx5_core
>
> root at dc-c3-small-x86-01:~/Dev/reinvent/scripts# mst status -v
> MST modules:
> ------------
>     MST PCI module is not loaded
>     MST PCI configuration module loaded
> PCI devices:
> ------------
> DEVICE_TYPE             MST                           PCI       RDMA
>      NET                       NUMA
> ConnectX4LX(rev:0)      /dev/mst/mt4117_pciconf0.1    01:00.1
> mlx5_bond_0     net-bond0                 -1
>
> ConnectX4LX(rev:0)      /dev/mst/mt4117_pciconf0      01:00.0
> mlx5_bond_0     net-bond0                 -1
>
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