Coral TPU PCI Passthrough

redakula

Thanks
Let me know and i will be happy to continue testing

Niall Con

This post is deleted!

Niall Con

Hi.
I'm just wondering if anyone ever got this to work? It's been a long time since I trialled xcp-ng. I really wanted to use it use the coral pci tpu for a Frigate NVR solution.
The coral.ai website only provides driver installation instructions for debian based systems.

I purchased a dual edge M.2 version and put it in the M.2 that was being used by the Wifi card (which I don't need.
This went into a mini pc running a Ryzen 5800u.

When I lspci -nn | grep 089a looking to see if the host machine recognises it. I get the following:

03:00.0 Non-VGA unclassified device [0000]: Global Unichip Corp. Coral Edge TPU [1ac1:089a]

So it does see it. But when I look in Xen Orchestra, there's no sign.

Was anyone successful in getting this to work?

Thank you.

redakula

@Niall-Con

Nope - i tested recently with the latest updates and the vm still crashes...

There were some patches for Xen and i tested the one @andSmv posted without any change.
There looked to be quite a few patches around similar issues on upstream Xen but i have no idea if any of them were relevant.

Maybe we will see improvement once Xcp-ng 9 comes about with a more recent version?

olivierlambert

Ping @andSmv I don't remember the status of this

Niall Con

@redakula Thanks for letting me know.
I guess I'll just have to go with a dedicated low power stand alone device for Frigate and keep an eye out in the future to see if it makes it's way into Xcp-ng 9.

andSmv

I don't aware if there's something new from Marek who initially worked on these patches. I think at the time he addressed not this particular hardware but rather the global issue, and this patch wasn't tested with Coral HW, so most probably that's why it doesn't work (may be more issues...)

I will ping Marek on XEN Community Matrix channel to know if there's something new at that level and will keep you posted.

milch

@andSmv Did you ever hear back by any chance?

andSmv

Just got the answer from Marek on that. The patches he made was tested with Intel Wifi cards and was targeting the similar issue (MSI-x table) but not the same as Coral TPU (PBA). It should be not very very difficult to extend his patches to the PBA, but unfortunately neither him (neither us) don't have this specific hardware.

The patches he made are actually upstream b2cd07a0447bfa25e96ae13e190225b61a3670cb so you can take a look at it if you want.

I will try to see if we have an easy possibility to get this HW

olivierlambert

The other way is to build a version that "should work" and make it test by the community

andSmv

@milch I will take a look this week and try to figure out if we can make progress on that, so you could have something to test.

Niall Con

@andSmv @olivierlambert
Hi Guys,
I'm happy to help. I wouldn't say I'm overly technical but not a noob either.
I have a clean install with the hardware. I can arrange a remote connection to the machine if that makes it easier.

Let me know and I'll do my best to assist.

andSmv

@Niall-Con Thank you! I'll take a look to that and will ping you to test on real hardware. Just need to find time (in the middle of storm right now), so it'll take one or two weeks most probably.