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I am trying to find out if there is an easy way to obtain a secondary PCI bus number of a PCIe-to-PCI bridge... I have Windows 10 installed on a PXIe chassis, which has a PCIe-to-PCI bridge connected to one of the root ports. My goal is to develop a DLL (as required by the spec) that returns the PCI bus number downstream of this bridge. The device ID of the bridge is known, and I can enumerate it using setupapi. Note that all the PCI slots are empty, so there is nothing connected to the downstream bus. I can get the primary bus number of the bridge device (using SPDRP_BUSNUMBER), but I cannot figure out a way to get the secondary bus number... is this even possible? Any pointers would be greatly appreciated!
Thanks in advance!
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