A Multifunction Device Within a Root Complex or a Switch
A Multifunction Device Within a Root Complex
Refer to Figure 21-9 on page 759.
Figure 21-9. Multifunction Bridges in Root Complex
The spec is unclear on whether or not a P2P on the root bus within a Root Complex can be a multifunction device. It states that the rules regarding the implementation of the Header Register (see Figure 21-7 on page 752) in a PCI-to-PCI bridge within a Root Complex or a Switch are defined by the PCI 2.3 spec rather than the PCI Express spec. This being the case, it would be legal for function 0 in a bridge that resides on the internal bus of a Root Complex to have ...
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