Hi,
I have a CameraLink capture card of which I do not have Linux drivers. I wanted to used it in Windows 11 under KVM.
I have managed to have the card recognized in the OS, installed drivers and the system does see the clock and data valid; great! But this doesn’t happen without hickups; KVM has to be started twice. The first time KVM starts, the driver tells me that there is not enough ressources for the API.
Even though the card seems to be working well, I cannot capture anything. The software is not able to fully use the card.
The system is:
AMD Ryzen 7950x3d
ASROCK Steel Legend x670e
Teledyne XTIUM-CL MX4 (capture card)
Archlinux system (Linux omega 6.4.6-artix1-1 #1 SMP PREEMPT_DYNAMIC Wed, 26 Jul 2023 13:47:50 +0000 x86_64 GNU/Linux)
lspci after boot for the card:
01:00.0 Memory controller [0580]: Coreco Inc Device [11ec:f81b]
Flags: fast devsel, IRQ 255, IOMMU group 12
Memory at fb000000 (32-bit, non-prefetchable) [disabled] [size=16M]
Capabilities: [80] Power Management version 3
Capabilities: [90] MSI: Enable- Count=1/1 Maskable- 64bit+
Capabilities: [c0] Express Endpoint, MSI 00
Capabilities: [100] Advanced Error Reporting
Capabilities: [150] Device Serial Number 00-00-00-00-00-00-00-00
Capabilities: [300] Secondary PCI Express
After vfio driver assignment:
01:00.0 Memory controller [0580]: Coreco Inc Device [11ec:f81b]
Flags: fast devsel, IRQ 255, IOMMU group 12
Memory at fb000000 (32-bit, non-prefetchable) [disabled] [size=16M]
Capabilities: [80] Power Management version 3
Capabilities: [90] MSI: Enable- Count=1/1 Maskable- 64bit+
Capabilities: [c0] Express Endpoint, MSI 00
Capabilities: [100] Advanced Error Reporting
Capabilities: [150] Device Serial Number 00-00-00-00-00-00-00-00
Capabilities: [300] Secondary PCI Express
Kernel driver in use: vfio-pci
Starting KVM first time (second time is the same):
01:00.0 Memory controller [0580]: Coreco Inc Device [11ec:f81b]
Flags: fast devsel, IRQ 135, IOMMU group 12
Memory at fb000000 (32-bit, non-prefetchable) [disabled] [size=16M]
Capabilities: [80] Power Management version 3
Capabilities: [90] MSI: Enable- Count=1/1 Maskable- 64bit+
Capabilities: [c0] Express Endpoint, MSI 00
Capabilities: [100] Advanced Error Reporting
Capabilities: [150] Device Serial Number 00-00-00-00-00-00-00-00
Capabilities: [300] Secondary PCI Express
Kernel driver in use: vfio-pci
First time KVM starts, lsirq does not show IRQ 135; second time, it does.
If kernel has not been started with irqpoll, I get the infamous “nobody cared” message and irq135 gets disabled. Running kernel with irqpoll, lsirq shows a whole bunch on interrupts (probably at each frame the grabber sees).
It is as if the interrupt assigned to the card is not what KVM is using to pass down to the guest Windows machine. The interrupt does not get to the capture card’s software and it fails.
I seek help to resolve this issue.
Best,
Norm
Sent from my ENIAC
