Experimental Physics and
Industrial Control System

Michael Davidsaver via Tech-talk <tech-talk at aps.anl.gov> · Thu, 20 Jan 2022 12:26:28 -0800

On 1/20/22 7:31 AM, GAGET Alexis via Tech-talk wrote:
> Hi,
> 
> I got this error a lot.
> 
> Many points :
> 
> - is the kernel module well loaded ? lsmod | grep mrf

If the kernel module is being loaded, but the /dev/uio* devices
are not being created, check the kernel log ("dmesg") for lines
including "uio_mrf" and/or the specific PCI B:D.F.

> - 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

fyi. I keep a collection of lspci output from cards I've encountered.
These were captured when correctly configured and running.  Maybe
helpful as a point of comparison.

https://github.com/epics-modules/mrfioc2/tree/master/documentation/lspci

> 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.
> 

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System