L- and H-tile Avalon® Streaming and Single Root I/O Virtualization (SR-IOV) Intel® FPGA IP for PCI Express* User Guide

ID 683111
Date 3/07/2022
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6.3. Power Management

The Intel L-/H-Tile Avalon-ST for PCI Express IP core supports the required PCI D0 and D3 Power Management states. It does not support the optional D1 and D2 Power Management states.

Software programs the Device into a D-state by writing to the Power Management Control and Status register in the PCI Power Management Capability Structure. The pm_* interface transmits the D-state to the Application Layer.

The Intel L-/H-Tile Avalon-ST for PCI Express IP and the Intel L-/H-Tile Avalon-MM for PCI Express IP do not support the L1 or L2 low power states. If the link ever gets into these states, performing a reset (by asserting pin_perst, for example) will allow the IP core to exit the low power state and the system to recover.

These IP cores also do not support the in-band beacon or sideband WAKE# signal, which are mechanisms to signal a wake-up event to the upstream device.