Multi Channel DMA Intel® FPGA IP for PCI Express Design Example User Guide

ID 683517
Date 4/29/2022
Public

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3.5.2.3.2.1. Installing the Linux Kernel Driver

  1. Install the UIO driver If we are proceeding with UIO support. If we are proceeding with vfio, this step not required:

    $ modprobe uio

  2. Build the mcdma kernel driver and load:
    1. $ cd software/kernel
    2. $ make clean all -C driver/kmod/mcdma-custom-driver
    3. $ insmod driver/kmod/mcdma-custom-driver/ifc_uio.ko
  3. Verify whether driver is loaded or not:

    $ lspci -d 1172:000 -v | grep ifc_uio

    (Kernel driver in use: ifc_uio)

Currently, UIO is the default.

To use the vfio driver, modify UIO_SUPPORT in common/mk/common.mk as follows:

__cflags += -UUIO_SUPPORT

  1. Install vfio-pci module.

    $ modprobe vfio-pci

  2. Bind the device to vfio-pci
    1. If the device is bound to ifc_uio, unbind with the following command:

      $ echo "<bdf>" > /sys/bus/pci/devices/<bdf>/driver/unbind

      E.g: echo "0000:01:00.0" > /sys/bus/pci/devices/0000\:01\:00.0/driver/unbind

    2. Bind the device to vfio-pci

      $ echo <bdf> > /sys/bus/pci/drivers/vfio-pci/bind

      E.g: echo "0000:01:00.0" > /sys/bus/pci/drivers/vfio-pci/bind

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