Experimental Physics and
Industrial Control System

Hi,

I got this error a lot.

Many points :

- is the kernel module well loaded ? lsmod | grep mrf

- Depending on the CPU you use, you need to configure your PCIe virtual switch correctly.
 for me with NAT COMEx and NAT MCH it's like that (in the MCH webserver) :

With my configuration that is MTCA EVM300 andMTCA EVR300U I also had this problem because the CPU (NAT COMEX) hosting my EPICS IOC booted after the EVR and EVM. So the PCI configuration was not well done and produced this exact message you write below.

A manual solution is to reboot manually just your CPU to see if it's the problem. If it is, for me in the MCH (NAT MCH PHYS80) I have an argument "upstream slot power delay" that I put to 40 sec, meaning that my COMEx in RTM boot 40sec after the crate boot. (this work only with the latest version of the NAT MCH firmware)

ps : I prefer to use "lspci -nmmn" to list my PCIe device

Cheers

Alexis GAGET

CEA Saclay DRF/IRFU/DIS/LDISC

De : Tech-talk <tech-talk-bounces at aps.anl.gov> de la part de gjzhai--- via Tech-talk <tech-talk at aps.anl.gov>
Envoyé : jeudi 20 janvier 2022 14:52:33
À : tech-talk at aps.anl.gov
Objet : mrfioc2-PCI device Configuration

Hello all I am trying to get MRF MTCA-EVG-300 and MTCA-EVR-300U configured and working on Linux using mrfioc2. I found geographic address(bus:device.function) in /proc/bus/pci/devices. The information is
 as follows:

0800 10ee7011 10 df100000 0 0 0 0 0 0 80000 0 0 0 0 0 0 pci_mrfevg

0900 10ee7011 11 df000000 0 0 0 0 0 0 40000 0 0 0 0 0 0 pci_mrfevr

According to the above information, my st.cmd in the iocevrmrm folder is defined as follows:
mrmEvrSetupPCI("MTCAEVR","09:00.0")
mrmEvgSetupPCI("EVG",08,00,0)


But the following error occurs:
mrmEvrSetupPCI("MTCAEVR","09:00.0")
Notice: devPCIFindSpec() expect B:D.F in hex
Device MTCAEVR 9:0.0 slot=8
Using IRQ 17
Failed to open uio device for PCI device 0000:09:00.0: No such filleor directory
Can neither open resource file nor uio file of PCI device 0000:09:00.0 BAR 0
PCI error: Failed to map BAR 0
mrmEvgSetupPCI("EVG",08,00,0)
Error: invalid spec '08'
PCI Device not found

I use mrfioc2 2.3.0 . How deal with this problem?
Thank you for your time. I am looking forward to your reply.