Re: mrfioc2 Linux driver

[Jeong Han Lee <citadel.lee@gmail.com>]

Hi,

  There are are two versions of mrfioc2, one is 
http://epics.sourceforge.net/mrfioc2/ and the other is the PSI one. At 
the some level, Michael merged from PSI changes into the community 
master branch.
  Last year, ESS supported Michael in order to integrate all MTCA EVR 
300 and PCIe EVR 300DC, because MTCA EVR 300 and PCIe EVR 300DC are the 
main EVRs which are used at ESS.
  The recent version of mrfioc2 is 2.2.0, and based on that version, 
ESS has the local customized one in github [1]. The most files which 
we've changed are DB and template files, and few configuration related 
files.
  The kernel driver and other configuration files can be done manually 
according to Michael's explanation. In addition, you might get the 
glimpse how ESS does in README [2]. Note that one shouldn't delete the 
cloned repository after the installation, because it uses the symbolic 
link instead of a hard copied path.
  In addition, two directories (template, cmds) in e3-mrfioc have 
useful information about hardware orientated substitution files and ESS 
EPICS startup scripts, which one can ignore the beginning few lines 
started with "require".  In the template directory, you can find the ESS 
PCIe-EVR-300DC substitutions file. We are planing to merge our changes 
to the main community one after this summer before next year.

  HTH,
  Han


[1] https://github.com/javicereijo/mrfioc2
[2] https://github.com/icshwi/e3-mrfioc2
[3] 
https://raw.githubusercontent.com/icshwi/e3-mrfioc2/master/template/evr-pcie-300dc-ess.substitutions
On 08/07/2018 06:15 PM, Michael Davidsaver wrote:
> > 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
> >
> >
> > d
> > o
> > m
> > o
> > d
> > p
> > r
> > o
> > b
> > e
> > m
> > r
> > f