Fwd: MRF kernel module, failed to map BARS

[Jeong Han Lee via Tech-talk <tech-talk at aps.anl.gov>]

---------- Forwarded message ---------
From: Jeong Han Lee <citadel.lee at gmail.com>
Date: Tue, Mar 23, 2021 at 10:56
Subject: Re: MRF kernel module, failed to map BARS
To: GAGET Alexis <alexis.gaget at cea.fr>

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
>
>