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SubjectQuestions about IOMMU & PCIe switch
Hello.

We have two kinds of PCIe cards:
A1 - based on chip B
A2 - based on same chip B but behind PCIe switch

Card A1 work flawlessly in any configuration,
but card A2 work flawlessly only if system
lack IOMMU or have disabled IOMMU

Questions:
Do we have to treat card with PCIe switch in special way?
How?
Where (PCI bridge driver? card's driver?)?
Any examples in kernel?

Thank you.

Raimonds Cicans


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