Goal
Here you will find the original code from Dmitry Denisenko which is used in many Altera OpenCL PCIe accelerators, like the Terasic DE5Net that I'm currently using.
The original code supports [conservative] systems based on Centos6/7 OS with "old" kernels like 3.8.
I try to adapt it to my system which is currently using Ubuntu 17.10 with kernel 4.13
This needs some tricky minor changes.
I use conditional compilation to make it kernel version independent.
Altera OpenCL PCI Express Driver for Linux
This directory contains full source code for the Altera OpenCL PCIE Express Driver for Linux [1][2].
The driver achieves approximately 3100 MB/sec on gen2 x 8 PCIe core with SG DMA on Stratix IV GX FPGA (77.5% efficiency).
LIMITATIONS
Only one single-threaded user process should be accessing the driver at a time.
DMA controller supports operations on 32-byte aligned data (both source and destination must be aligned). Furthermore, the size of the data must also be 32-byte aligned. If any of these alignments are not met, very slow non- DMA transfer will be used.
PREREQUISITES
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GCC version in /usr/bin (the same version of gcc that was used to compile the kernel).
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Kernel include files, or the complete source. The make script (make_all.sh) assumes that the source is installed in /usr/src/kernels/. If the /usr/src/kernels/ is missing or does not contain Makefile, install kernel-devel package by running (as root) "yum install kernel-devel".
COMPIILE and INSTALL
To compile and install the driver, run as root: aocl install (The installation loads the driver, and sets up the necessary files to allow automatic load of driver upon reboot)
To manually load/unload the driver: sudo /sbin/modprobe aclpci_drv (load) sudo /sbin/modprobe -r aclpci_drv (unload)
TESTING
The driver was developed and tested on CentOS 5.6, 64-bit with 2.6.18-238.el5 kernel compiled for x86_64 architecture.
Also tested on CentOS 6.4, 64-bit with 2.6.32-358.el6.x86_64 kernel.
FEEDBACK
Issues, comments, enhancements? Contect Dmitry Denisenko at ddenisen (at) altera.com.
[1] Altera, Quartus, and Stratix are tradermarks of Altera Corporation. [2] OpenCL and the OpenCL logo are trademarks of Apple Inc.