How to build linux pcie device driver?

Technical Support
1

Linux verdin-imx8mp-15404404 5.4.193-5.7.2+git.b60d3160fd04

I’d like to install PCIe device on my i.MX8MP board.

First of all, I installed Torizon os with container.
And I can connect the device with ssh client.

But there is no kernel headerfile to build linux pcie device driver.
/lib/modules/5.4.193-5.7.2+git.b60d3160fd04/build/include/generated/autoconf.h,
/lib/modules/5.4.193-5.7.2+git.b60d3160fd04/build/include/config/auto.conf

How can I build pcie device driver for this linux environment.

2

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To build a PCIe device driver for your Verdin iMX8M Plus board running TorizonCore, you need to follow these steps:

Prerequisites

  1. TorizonCore Builder Tool: Ensure you have the TorizonCore Builder tool installed. This tool simplifies the process of adding kernel modules to TorizonCore images.

Steps to Build and Install the PCIe Device Driver

1. Install TorizonCore Builder

If you haven’t already installed TorizonCore Builder, follow the installation instructions provided in the TorizonCore Builder documentation.

2. Prepare Your Kernel Module Source Code

Organize your PCIe device driver source code into a directory. For example, let’s call this directory pcie-driver.

3. Create a Makefile

Ensure your pcie-driver directory contains a Makefile. The Makefile should include the environment variable $(KERNEL_SRC) or $(KDIR). Here is an example Makefile:

obj-m := pcie_driver.o

KERNEL_SRC ?= /lib/modules/$(shell uname -r)/build

all:
    $(MAKE) -C $(KERNEL_SRC) M=$(PWD) modules

clean:
    $(MAKE) -C $(KERNEL_SRC) M=$(PWD) clean

4. Build the Kernel Module

Use the TorizonCore Builder tool to build the kernel module. Run the following command in the directory containing your pcie-driver source code:

torizoncore-builder kernel build_module --source-dir pcie-driver

5. Create a Custom TorizonCore Image

You can create a custom TorizonCore image with your built kernel module. There are two approaches: using a configuration YAML file or standalone commands.

Approach 1: Using a Configuration YAML File

Create a tcbuild.yaml file with the following content:

input:
  easy-installer:
    local: torizon-core-docker-verdin-imx8mp-Tezi_5.4.193-5.7.2+build.7.tar

customization:
  kernel:
    modules:
      - source-dir: pcie-driver
        autoload: yes

Then, run the build command:

torizoncore-builder build
Approach 2: Using Standalone Commands

Please, also check if these links can help you solve your problem:

Verdin iMX8MP Gstreamer issue with encoder and decoder.