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To set up SR-IOV, do the following:

  1. Download mstflint

    # zypper install mstflint
  2. Check the device’s PCI

    lspci | grep Mellanox

    Example:

    24:00.0 Ethernet controller: Mellanox Technologies MT28800 Family [ConnectX-5 Ex]
  3. Check if SR-IOV is enabled in the in the firmware.

    mstconfig -d <device pci> q

    Example:

    # mstconfig -d 00:06.0 q
    Device #1:
    
    Device type:      ConnectX3Pro     
    PCI device:       00:06.0    
    
    Configurations:            Current
    SRIOV_EN                   True(1)
    NUM_OF_VFS                 8
    LINK_TYPE_P1               ETH(2)
    LINK_TYPE_P2               IB(1)
    LOG_BAR_SIZE               3
    BOOT_PKEY_P1               0
    BOOT_PKEY_P2               0
    BOOT_OPTION_ROM_EN_P1      True(1)
    BOOT_VLAN_EN_P1            False(0)
    BOOT_RETRY_CNT_P1          0
    LEGACY_BOOT_PROTOCOL_P1    PXE(1)
    BOOT_VLAN_P1               1
    BOOT_OPTION_ROM_EN_P2      True(1)
    BOOT_VLAN_EN_P2            False(0)
    BOOT_RETRY_CNT_P2          0
    LEGACY_BOOT_PROTOCOL_P2    PXE(1)
    BOOT_VLAN_P2               1
    IP_VER_P1                  IPv4(0)
    IP_VER_P2                  IPv4(0)           
  4. Enable SR-IOV:

    mstconfig –d <device pci> s SRIOV_EN=<False|True>
  5. Configure the needed number of VFs.

    mstconfig –d <device pci> s NUM_OF_VFS=<NUM>

    This file will be generated only if IOMMU is set in grub configuration. (by adding “intel_iommu=on” to  /etc/default/grub).

  6. [mlx4 devices only] Edit the file /etc/modprobe.d/mlx4.conf:

    options mlx4_core num_vfs=[needed num of VFs] port_type_array=[1/2

    Example:

    options mlx4_core num_vfs=8 port_type_array=1,1
  7. [mlx5 devices only] Write to the sysfs file the number of needed

    echo [num_vfs] > /sys/class/infiniband/mlx5_0/device/sriov_numvfs 
  8. Reboot the
  9. Load the driver and verify that the VFs were

    lspci | grep mellanox  

    Example:

    24:00.0 Ethernet controller: Mellanox Technologies MT28800 Family
    [ConnectX-5 Ex]
    24:00.1 Infiniband controller: Mellanox Technologies MT28800 Family [ConnectX-5 Ex]
    24:00.2 Ethernet controller: Mellanox Technologies MT28800 Family [ConnectX-5 Ex Virtual Function]
    24:00.3 Ethernet controller: Mellanox Technologies MT28800 Family [ConnectX-5 Ex Virtual Function]
    24:00.4 Ethernet controller: Mellanox Technologies MT28800 Family [ConnectX-5 Ex Virtual Function]
    24:00.5 Ethernet controller: Mellanox Technologies MT28800 Family [ConnectX-5 Ex Virtual Function]

For further information, refer to section "Setting Up SR-IOV" in the MLNX_OFED User Manual.