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+.. SPDX-License-Identifier: GPL-2.0
+
+====================
+i40e devlink support
+====================
+
+This document describes the devlink features implemented by the ``i40e``
+device driver.
+
+Parameters
+==========
+
+.. list-table:: Generic parameters implemented
+    :widths: 5 5 90
+
+    * - Name
+      - Mode
+      - Notes
+    * - ``max_mac_per_vf``
+      - runtime
+      - Controls the maximum number of MAC addresses a VF can use
+        on i40e devices.
+
+        By default (``0``), the driver enforces its internally calculated per-VF
+        MAC filter limit, which is based on the number of allocated VFS.
+
+        If set to a non-zero value, this parameter acts as a strict cap:
+        the driver will use the user-provided value instead of its internal
+        calculation.
+
+        **Important notes:**
+
+        - This value **must be set before enabling SR-IOV**.
+          Attempting to change it while SR-IOV is enabled will return an error.
+        - MAC filters are a **shared hardware resource** across all VFs.
+          Setting a high value may cause other VFs to be starved of filters.
+        - This value is a **Administrative policy**. The hardware may return
+          errors when its absolute limit is reached, regardless of the value
+          set here.
+
+        The default value is ``0`` (internal calculation is used).
+
+
+Info versions
+=============
+
+The ``i40e`` driver reports the following versions
+
+.. list-table:: devlink info versions implemented
+    :widths: 5 5 5 90
+
+    * - Name
+      - Type
+      - Example
+      - Description
+    * - ``board.id``
+      - fixed
+      - K15190-000
+      - The Product Board Assembly (PBA) identifier of the board.
+    * - ``fw.mgmt``
+      - running
+      - 9.130
+      - 2-digit version number of the management firmware that controls the
+        PHY, link, etc.
+    * - ``fw.mgmt.api``
+      - running
+      - 1.15
+      - 2-digit version number of the API exported over the AdminQ by the
+        management firmware. Used by the driver to identify what commands
+        are supported.
+    * - ``fw.mgmt.build``
+      - running
+      - 73618
+      - Build number of the source for the management firmware.
+    * - ``fw.undi``
+      - running
+      - 1.3429.0
+      - Version of the Option ROM containing the UEFI driver. The version is
+        reported in ``major.minor.patch`` format. The major version is
+        incremented whenever a major breaking change occurs, or when the
+        minor version would overflow. The minor version is incremented for
+        non-breaking changes and reset to 1 when the major version is
+        incremented. The patch version is normally 0 but is incremented when
+        a fix is delivered as a patch against an older base Option ROM.
+    * - ``fw.psid.api``
+      - running
+      - 9.30
+      - Version defining the format of the flash contents.
+    * - ``fw.bundle_id``
+      - running
+      - 0x8000e5f3
+      - Unique identifier of the firmware image file that was loaded onto
+        the device. Also referred to as the EETRACK identifier of the NVM.