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

[fwefew 4t4tg]

Mr. Ferber, much appreciated. I knew this metal box came to me with two
mellanox NICs bonded. I used their util to unbond it, but alas it did not
do it all the way. The /etc/network/interfaces was bad. I fixed the config
and rebooted.

Voila. Success. ibv_devinfo now shows two devices. And the DPDK app runs.

Your point about bonding nudged me to double check.

*Now, on a second machine where I believe I have done everything I did on
the first machine*, running the DPDK application continues to look for the
wrong driver:

EAL: Detected CPU lcores: 16
EAL: Detected NUMA nodes: 1
EAL: Detected shared linkage of DPDK
EAL: libmlx4.so.1: cannot open shared object file: No such file or directory
EAL: FATAL: Cannot init plugins
EAL: Cannot init plugins

Somehow I fixed this on the first machine, but I cannot duplicate success
on the second machine.

Both machines report two devices; both machines show similar ifconifgs

    device             node GUID

    ------          ----------------

    mlx5_0          0c42a103007ea9b8

    mlx5_1          0c42a103007ea9b9


    device             node GUID

    ------          ----------------

    mlx5_0          0c42a103007ea3ec

    mlx5_1          0c42a103007ea3ed


root at server:~/Dev/reinvent/scripts# ibv_devinfo

hca_id: mlx5_0

transport: InfiniBand (0)

fw_ver: 14.32.1010

node_guid: 0c42:a103:007e:a3ec

sys_image_guid: 0c42:a103:007e:a3ec

vendor_id: 0x02c9

vendor_part_id: 4117

hw_ver: 0x0

board_id: MT_2420110034

phys_port_cnt: 1

port: 1

state: PORT_ACTIVE (4)

max_mtu: 4096 (5)

active_mtu: 1024 (3)

sm_lid: 0

port_lid: 0

port_lmc: 0x00

link_layer: Ethernet


hca_id: mlx5_1

transport: InfiniBand (0)

fw_ver: 14.32.1010

node_guid: 0c42:a103:007e:a3ed

sys_image_guid: 0c42:a103:007e:a3ec

vendor_id: 0x02c9

vendor_part_id: 4117

hw_ver: 0x0

board_id: MT_2420110034

phys_port_cnt: 1

port: 1

state: PORT_ACTIVE (4)

max_mtu: 4096 (5)

active_mtu: 1024 (3)

sm_lid: 0

port_lid: 0

port_lmc: 0x00

link_layer: Ethernet





ibv_devinfo

hca_id: mlx5_0

transport: InfiniBand (0)

fw_ver: 14.32.1010

node_guid: 0c42:a103:007e:a9b8

sys_image_guid: 0c42:a103:007e:a9b8

vendor_id: 0x02c9

vendor_part_id: 4117

hw_ver: 0x0

board_id: MT_2420110034

phys_port_cnt: 1

port: 1

state: PORT_ACTIVE (4)

max_mtu: 4096 (5)

active_mtu: 1024 (3)

sm_lid: 0

port_lid: 0

port_lmc: 0x00

link_layer: Ethernet


hca_id: mlx5_1

transport: InfiniBand (0)

fw_ver: 14.32.1010

node_guid: 0c42:a103:007e:a9b9

sys_image_guid: 0c42:a103:007e:a9b8

vendor_id: 0x02c9

vendor_part_id: 4117

hw_ver: 0x0

board_id: MT_2420110034

phys_port_cnt: 1

port: 1

state: PORT_ACTIVE (4)

max_mtu: 4096 (5)

active_mtu: 1024 (3)

sm_lid: 0

port_lid: 0

port_lmc: 0x00

link_layer: Ethernet

On Tue, Apr 5, 2022 at 1:00 PM Erez Ferber <erezferber at gmail.com> wrote:

> 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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