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detect failures, and get different PCI IDs. For the former the interface returns an int to signal an error. The ID is returned at a uintptr_t * argument. For the latter there is a type argument that allows selecting the ID type. This only specifies a single type, however a MSI type will be added to handle the need to find the ID the hardware passes to the ARM GICv3 interrupt controller. A follow up commit will be made to remove pci_get_rid. Reviewed by: jhb, rstone Obtained from: ABT Systems Ltd Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D6239