PCI Express (abbreviated as PCIe) is the newest bus standard designed to replace the old PCI/PCI-X and AGP standards. PCIe is used in servers, consumer, and industrial applications either as a motherboard-level interconnection to link peripherals or as an expansion card interface for add on boards. The Zynq® UltraScale+™ MPSoC provides a controller for the integrated block for PCI Express® v2.1 compliant, AXI-PCIe bridge, and DMA modules. The AXI-PCIe bridge provides high-performance bridging between PCIe and AXI.
Hardware Setup
Root Port Driver Configuration
Message Signaled Interrupts (MSI
https://github.com/Xilinx/linux-xlnx/blob/master/drivers/pci/controller/pcie-xilinx-nwl.c