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The LS1028A SoC features a PCI Integrated Endpoint Root Complex (IERC) defining several integrated PCI devices, including the ENETC ethernet controller integrated endpoints (IEPs). The IERC implements ECAM (Enhanced Configuration Access Mechanism) to provide access to the PCIe config space of the IEPs. This means the the IEPs (including ENETC) do not support the standard PCIe BARs, instead the Enhanced Allocation (EA) capability structures in the ECAM space are used to fix the base addresses in the system, and the PCI subsystem uses these structures for device enumeration and discovery. The "ranges" entries contain basic information from these EA capabily structures required by the kernel for device enumeration. The current patch also enables the first 2 ENETC PFs (Physiscal Functions) and the associated VFs (Virtual Functions), 2 VFs for each PF. Each of these ENETC PFs has an external ethernet port on the LS1028A SoC. Signed-off-by: Alex Marginean <alexandru.marginean@nxp.com> Signed-off-by: Claudiu Manoil <claudiu.manoil@nxp.com> Signed-off-by: David S. Miller <davem@davemloft.net> |
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