Experimental Physics and
Industrial Control System

HI Alexis,

You have to allow all other cards to be booted after your cpu is ready
to communicate with each other through MCH pcie. The order is

1 MCH / 2 CPU / 3 Others

You can contact ESS to ask about their configuration for MTCA or
please check https://github.com/icshwi/mch_config

HTH,
Han

On Tue, Mar 23, 2021 at 8:34 AM GAGET Alexis via Tech-talk
<tech-talk at aps.anl.gov> wrote:
>
> Dear All,
>
> Here at saclay we are using MRF timing system with MTCA.4 in R2 NAT crate.
>
> I’m using the COMex-E3 and a MCH-PHYS80. The IOC using the mrfioc2 driver is running on the Comex and the mrf kernel module is loaded on it. I have forked from ESS version of mrfioc2, and the kernel module I built seems the same.
>
> My kernel version is : 3.10.0-1160.15.2.el7.x86_64 on a CenTOS Linux 7.9.2009
>
> It works globally very well, but I have a reproducible issue:
>
> When I reboot the whole R2 crate and when I load the MRF kernel module I have the following message :
>
>  [  347.344081] mrf: module verification failed: signature and/or required key missing - tainting kernel
> [  347.345504] mrf-pci 0000:04:00.0: Attaching MRF device w/o PLX bridge (00007011)
> [  347.345581] mrf-pci 0000:04:00.0: can't ioremap BAR 0: [??? 0x00000000 flags 0x0]
> [  347.345646] mrf-pci 0000:04:00.0: Failed to map BARS! 0 0
> [  347.345918] mrf-pci 0000:06:00.0: Attaching MRF device w/o PLX bridge (00007011)
> [  347.345989] mrf-pci 0000:06:00.0: can't ioremap BAR 0: [??? 0x00000000 flags 0x0]
> [  347.346053] mrf-pci 0000:06:00.0: Failed to map BARS! 0 0
>
> Consequence, my Comex can’t find some of my EVR or EVM (some are found..).
>
> To make it work I just have to reboot the Comex and after that it’s working. Meaning after a shutdown I have to reboot it twice…
>
> Does anyone have this kind of trouble ? Knows how to solve it ? or even understand this message ?
>
> Thanks for your consideration
>
> Alexis GAGET
>
> CEA Saclay - DRF/Irfu/DIS/LDISC
>
> Bâtiment 472 – pièce 105
>
> alexis.gaget at cea.fr
>
> 01 69 08 95 17
>
>