iommu/of: Handle PCI aliases properly
When a PCI device has DMA quirks, we need to ensure that an upstream IOMMU knows about all possible aliases, since the presence of a DMA quirk does not preclude the device still also emitting transactions (e.g. MSIs) on its 'real' RID. Similarly, the rules for bridge aliasing are relatively complex, and some bridges may only take ownership of transactions under particular transient circumstances, leading again to multiple RIDs potentially being seen at the IOMMU for the given device. Take all this into account in the OF code by translating every RID produced by the alias walk, not just whichever one comes out last. Happily, this also makes things tidy enough that we can reduce the number of both total lines of code, and confusing levels of indirection, by pulling the "iommus"/"iommu-map" parsing helpers back in-line again. Signed-off-by:Robin Murphy <robin.murphy@arm.com> Signed-off-by:
Joerg Roedel <jroedel@suse.de>
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