Build and Load the Driver

This guide covers building the datadev kernel module for your running kernel, loading it with insmod, and configuring automatic loading on boot.

Note

This guide applies to the data_dev (PCIe/x86) driver. For RCE/ARM cross-compilation, see Cross-Compile for RCE (ARM/Zynq).

Prerequisites

sudo apt install linux-headers-$(uname -r) build-essential git

git clone https://github.com/slaclab/aes-stream-drivers.git
cd aes-stream-drivers
make driver
make app

Output: install/$(uname -r)/datadev.ko and userspace tools under install/bin/.

sudo insmod install/$(uname -r)/datadev.ko \
  cfgTxCount=1024 \
  cfgRxCount=1024 \
  cfgSize=131072 \
  cfgMode=1 \
  cfgCont=1

Verify the driver loaded successfully:

lsmod | grep datadev
ls /dev/datadev_*
cat /proc/datadev_0

To load the driver automatically at boot with the same parameters, copy the provided configuration file:

sudo cp data_dev/driver/datadev.conf /etc/modprobe.d/datadev.conf

The file sets the following options (edit to match your hardware):

options datadev cfgTxCount=1024 cfgRxCount=1024 cfgSize=131072 cfgMode=1 cfgCont=1

Then load the driver via modprobe:

sudo modprobe datadev

sudo rmmod datadev

For all available module parameters with defaults and valid ranges, see Module Parameters — datadev.