Hi all, Currently we have no generic/standard mechanisms for describing the relationship between PCI root complexes and other components which may be required to make them usable, specifically IOMMUs and MSI controllers.
There is an existing binding for IOMMUs, and there is a de-facto standard for referring to MSI controllers, but the generic portion of these can only describe a relationship with a root complex as opposed to a device under a root complex. This falls apart where IOMMUs and MSI controllers may distinguish individual devices based on non-probeable information. This series adds a generic "glue" bindings for describing the relationship between root complexes, IOMMUs, and MSI controllers. The existing de-facto binding for MSI controllers is formalised, along with a (backwards compatible) extension necessary for describing contemporary MSI controllers which make use of (non-probeable) sideband data. Thanks, Mark. Mark Rutland (3): Docs: dt: add generic MSI bindings Docs: dt: Add PCI MSI map bindings Docs: dt: add PCI IOMMU map bindings .../bindings/interrupt-controller/msi.txt | 135 +++++++++++++ .../devicetree/bindings/pci/pci-iommu.txt | 171 ++++++++++++++++ Documentation/devicetree/bindings/pci/pci-msi.txt | 220 +++++++++++++++++++++ 3 files changed, 526 insertions(+) create mode 100644 Documentation/devicetree/bindings/interrupt-controller/msi.txt create mode 100644 Documentation/devicetree/bindings/pci/pci-iommu.txt create mode 100644 Documentation/devicetree/bindings/pci/pci-msi.txt -- 1.9.1 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu
