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OpenCL BSP HPS: Are updated OpenCL Drivers / libs for newer Linux kernels available ?


I am using OpenCL HPS BSP Packages with the arria10. ( Linux on HPS )

since Linux kernel upgrade the way Linux works with the FPGA changed. I fiddled around about 2 weeks now with the OpenCL Packages.


In the newer kernels ( time of writing i worked with 4.1.168 ) there is no more /sys/class/fpga-bridge it works differently.



see :


I looked into the driver structure ( aclsoc_drv ) and also in the subsequent files.


I get several kernel panics when using the existing drivers and structures i got with the BSP Packages.


In the file acl_mmd_config.c for example:



// Disable communication bridges between ARM and FPGA

void ACL_MMD_CONFIG::disable_bridges()


  system ("echo 0 > /sys/class/fpga-bridge/fpga2hps/enable");

  system ("echo 0 > /sys/class/fpga-bridge/hps2fpga/enable");

  system ("echo 0 > /sys/class/fpga-bridge/lwhps2fpga/enable");



// Enable communication bridges between ARM and FPGA

void ACL_MMD_CONFIG::enable_bridges()


  system ("echo 1 > /sys/class/fpga-bridge/fpga2hps/enable");

  system ("echo 1 > /sys/class/fpga-bridge/hps2fpga/enable");

  system ("echo 1 > /sys/class/fpga-bridge/lwhps2fpga/enable");




this doesnt work with the newer Kernels anymore because the /sys/class/fpga-bridge isnt populated anymore......




i switched the kernel back to an old one and they are populated again. ( no changes to the rbfs or dtds nothing. just swapped the kernel with identical buildconfigs.



So my question. is there a new Driver package available ?


MMD driver and the ACLSOC_drv ?









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1 Reply

Hello, TLeng2,


I'm sorry for delay for response.

Also, unfortunately, we don't evaluate newer kernel version(4.x) driver yet and please wait for the future versions.


I appreciate if you report your error log such including kernel panics.