Problem Passthrough AVM GmbH Fritz!Card PCI v2.0 ISDN with PCIe to PCI Adapter

[Karatekid]

Hi,

 

I have a AVM GmbH Fritz!Card PCI v2.0 ISDN and I want to passthrough the card to Windows but I got a error.

I googled this error but don't find a solution. Hopefully you can help me.

 

"Failed to set up TRIGGER eventfd signaling for interrupt INTX-0: VFIO_DEVICE_SET_IRQS failure: Device or resource busy"

 

 

 

I tried different PCIe ACS override settings but no change.

 

VMS Error attached.

 

 

 

 

VMS_error.txt

[Karatekid]

Nobody had an Idea?

[scorcho99]

Try installing the adapter+card in different PCI-e slots.

 

I've noticed the IRQ sharing actually comes into play with legacy PCI devices and passthrough.

 

Its also possible this device is simply not going to get along with PCI passthrough, not all of them do.

 

I think there is also an option in VM settings for "allow unsafe interrupts". I've never used it and am not sure what it does but it might be worth a shot.

[Karatekid]

Badly I only have one PCIe Slot

 

How can you see if it is a legacy PCI devices or what do you mean with that. I didn't heard something like that.

 

Testet also with the unsafe interrupts and no change at all

 

 

[scorcho99]

There's a third party (asmedia) PCIe to PCI bridge listed in your first post. So the device is actually a legacy PCI device with a converter chip basically. Not a lot of people try to run legacy PCI stuff but it does work sometimes at least.

 

Maybe try binding the device to vfio at boot if it isn't already.

[Karatekid]

Ahh understood. thank you for your explanation.

 

I added it with Bind and the VFIO Plugin and also tested the new RC Unraid version but non of them was working.

I ordered a USB ISDN "Card" hopefully this can be forwarded and is functional. Than this problem is not relevant anymore.