aes-stream-drivers

DOE Code

Common repository for streaming kernel drivers (datadev, gpuDirect, Yocto, etc)

common/

Contains shared kernel and application libraries

data_dev/

Contains driver and application code for TID-AIR generic DAQ PCIe cards, optionally with GPUDirect RDMA support (for use with NVIDIA GPUs)

/etc/modprobe.d/datadev.conf

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

include/

Contains top level application include files for all drivers

rce_hp_buffers/

Contains driver that allocates memory blocks for use in a pure firmware dma engine

rce_stream/

Contains driver and application code for the RCE AXI stream DMA

Yocto/

Contains BitBake recipes for the aximemorymap and axistreamdma drivers.

How to build the data_dev driver

# Go to the base directory
$ cd aes-stream-drivers

# Build the drivers
$ make driver

# Build the applications
$ make app

How to load the data_dev driver

# Go to the base directory
$ cd aes-stream-drivers

# Load the driver for the current kernel
$ sudo insmod install/$(uname -r)/datadev.ko

How to use the Yocto recipes

The Yocto recipes can be trivially included in your Yocto project via symlink.

$ ln -s $aes_stream_drivers/Yocto/recipes-kernel $myproject/sources/meta-user/recipes-kernel

Make sure to set the following variables in your local.conf:

# Substitute these values with your own desired settings
DMA_TX_BUFF_COUNT = 128
DMA_RX_BUFF_COUNT = 128
DMA_BUFF_SIZE     = 131072

For a practical example of how to integrate these recipes into a Yocto project, see axi-soc-ultra-plus-core.

How to build the RCE drivers

# Go to the base directory
$ cd aes-stream-drivers

# Source the setup script (required for cross-compiling)
$ source /sdf/group/faders/tools/xilinx/2016.4/Vivado/2016.4/settings64.sh

# Build the drivers
$ make rce