[Test] Agilex 7 F-Tile PCIe mode supports

Hi,

Here's a summary of the PCIe modes and configurations supported by the Agilex 7 F-Tile:

Supported PCIe Generations

F-Tile supports configurations up to PCIe 4.0 x16, with PCIe Gen3 and Gen4 natively supported. Agilex 7 · PCIe

Supported Interface Modes

F-Tile supports Endpoint (EP), Root Port (RP), and Transaction Layer (TL) Bypass modes. Agilex 7 · PCIe

Supported Link Width Configurations

F-Tile supports up to one Gen4 x16, two Gen4 x8, or four Gen4 x4 PCIe hard IP configurations. Agilex 7 · Transceiver/PHY

More specifically, the supported configurations are:

1x PCIe x16 — Root Port or Endpoint (upstream or downstream port) PCIe® Hard IP

2x PCIe x8 — Endpoint only (various upstream/downstream port combinations) PCIe® Hard IP

1x PCIe x8 — Root Port or Endpoint PCIe® Hard IP

4x PCIe x4 — Root Port only (upstream or downstream port) PCIe® Hard IP

2x PCIe x4 — Root Port or Endpoint PCIe® Hard IP

1x PCIe x4 — Root Port or Endpoint PCIe® Hard IP

Port Bifurcation

The PHY channel assignments per bifurcation mode are:

1x16: lanes 0–15 on port 0

2x8: lanes 0–7 on port 0, lanes 8–15 on port 1

4x4: lanes 0–3 on port 0, lanes 4–7 on port 2, lanes 8–11 on port 1, lanes 12–15 on port 3

PMA/PCS

Additional Topology Notes (recent additions)

A PCIe 1x4 configuration (Topology R) for Root Port mode was introduced in IP v12.1.0, allowing implementation of a PCIe 1x4 Root Port while unused F-Tile FGT channels can be used for Ethernet and other protocols. Agilex 7 · PCIe

A PCIe 2x8 configuration (Topology S) for Root Port mode was introduced in IP v12.3.0. Agilex 7 · PCIe

Independent refclk support for 2x4 Hard IP mode is also available, allowing connection to two discrete x4 PCIe endpoints where an independent refclk source is required. Agilex 7 · PCIe

Hard IP Layers

Two hard IP modes are supported: Full Hard IP (Transaction Layer, Data Link Layer, and PHY Layer all hardened) and TLP Bypass mode (Transaction Layer Lite + Data Link Layer + PHY Layer). PCIe® Hard IP