META-DREAMER/Qwik-e-Classifier

Compiled OpenCL kernel driver for FPGA segfaults during `insmod aclsoc_drv.ko`

nocduro opened this issue · 4 comments

nocduro commented

Tried the intel image from that page, and it doesn't get past u-boot:

Error: ethernet@ff702000 address not set.

Trying the DE10_Nano_Xfce from terasic next

nocduro commented

When segfaulting the error showed something like address 0, which doesn't make sense for a properly compiled driver. I tried recompiling, and got some warnings that I fixed by compiling the Linux kernel to generate header files and the required module support.

In the folder with linux, run

make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- KERNEL=kernel7

I think this will run the configurator, where we need to enable support for modules:

*
* Enable loadable module support
*
Enable loadable module support (MODULES) [Y/n/?] y
  Forced module loading (MODULE_FORCE_LOAD) [N/y/?] (NEW) y
  Module unloading (MODULE_UNLOAD) [N/y/?] (NEW) y
    Forced module unloading (MODULE_FORCE_UNLOAD) [N/y/?] (NEW) y
  Module versioning support (MODVERSIONS) [N/y/?] (NEW) y
  Source checksum for all modules (MODULE_SRCVERSION_ALL) [N/y/?] (NEW)
  Module signature verification (MODULE_SIG) [N/y/?] (NEW)
  Compress modules on installation (MODULE_COMPRESS) [N/y/?] (NEW)
*

Earlier on in the first build I enabled support for Altera CPUs, and other things related to our board, but I'm not sure if they influence the driver compilation. Since we are just compiling a kernel module, we might just need the above kernel module support.

After modifying the config, and building linux, I compiled the driver and it completed without errors. Still need to test it on the DE10-nano board.

edit: modified driver available in commit 8d5df10

edit: new driver did not work, complains about vermagic error:

root@de10-nano:~/opencl# insmod aclsoc_drv.ko
[  125.640694] aclsoc_drv: version magic '4.1.33-ltsialtera-gb84195c mod_unload modversions ARMv7 thumb2 p2v8 ' should be '4.1.33-ltsi-altera SMP mod_unload ARMv7 p2v8 '
insmod: ERROR: could not insert module aclsoc_drv.ko: Invalid module format

Trying to force with modprobe aclsoc_drv --force gives:

root@de10-nano:~/opencl# modprobe --force -a aclsoc_drv
modprobe: ERROR: could not insert 'aclsoc_drv': Exec format error
root@de10-nano:~/opencl# /sbin/modinfo aclsoc_drv.ko
filename:       /home/root/opencl/aclsoc_drv.ko
description:    Driver for Intel(R) OpenCL SoC Acceleration Devices
license:        Dual BSD/GPL
author:         Dmitry Denisenko
depends:
vermagic:       4.1.33-ltsialtera-gb84195c mod_unload modversions ARMv7 thumb2 p2v8