Re: mrfioc2 Linux driver

[Michael Davidsaver <mdavidsaver@gmail.com>]

> mrfioc2 3-0-0

The latest version of the mrfioc2 modules is 2.2.0 released in October 2017.  Are you my chance using the PSI forked version?

http://epics.sourceforge.net/mrfioc2/

Please note the Supported Hardware section.  This includes the PCIe-EVR-300dc

Section 4 of my manual covers the setup you're trying to do.

http://epics.sourceforge.net/mrfioc2/evr-usage.pdf

There is also a example UDEV rule in mrmShared/linux/README

If you're able to try 2.2.0, and still have difficulty getting the kernel module loaded,
please reply with the output of:

> lsmod |grep mrf

> dmesg|grep mrf


On 08/07/2018 08:40 AM, Steve Kinder - UKRI STFC wrote:
> Hello all
> 
> 
> I am trying to get an MRF PCIe-EVR-300DC configured and working on Linux using mrfioc2. I think I have an IOC built. I think I have some understanding of the parameters to mrmEvrSetupPCI(EVR-01, 1, 0, 0, 0). I could well be wrong on those but that isn't the source of my immediate problem. Executing the previous call gives:
> 
> 
> Can't open /sys/module/mrf/parameters/interfaceversion in order to read kernel module interface version. Is kernel module loaded?
> 
> 
> I found some documentation that indicates an MRF kernel driver is also required:
> 
> 
> $ make -C /location/of/mrmShared/linux \
> 
> KERNELDIR=/lib/modules/`uname -r`/build modules_install
> 
> $ sudo depmod -a
> 
> $ sudo modprobe mrf
> 
> 
> I seem to need to execute the first line as root or I get permissions problems. However then I get:
> 
> 
> # make -C /home/controls/work/R3.14.12.5/support/mrfioc2/3-0-0/mrmShared/linux KERNELDIR=/lib/modules/`uname -r`/build modules_install
> make: Entering directory `/home/controls/work/R3.14.12.5/support/mrfioc2/3-0-0/mrmShared/linux'
> make -C /lib/modules/3.10.0-514.6.1.el7.x86_64/build M=/home/controls/work/R3.14.12.5/support/mrfioc2/3-0-0/mrmShared/linux modules_install
> make[1]: Entering directory `/usr/src/kernels/3.10.0-514.6.1.el7.x86_64'
> Makefile:641: Cannot use CONFIG_CC_STACKPROTECTOR_STRONG: -fstack-protector-strong not supported by compiler
>   DEPMOD  3.10.0-514.6.1.el7.x86_64
> make[1]: Leaving directory `/usr/src/kernels/3.10.0-514.6.1.el7.x86_64'
> make: Leaving directory `/home/controls/work/R3.14.12.5/support/mrfioc2/3-0-0/mrmShared/linux'
> 
> 
> The documentation dates back to 2015, Rev 7, so may be out of date?
> 
> 
> Any advice/help would be much appreciated. Further documentation?
> 
> 
> My kernel is 3.10.0-514.6.1.el7.x86_64, mrfioc2 3-0-0
> 
> 
> Thanks
> 
> 
> Steve
> 
> 
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