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- .. SPDX-License-Identifier: GPL-2.0
- ==========================
- Devlink E-Switch Attribute
- ==========================
- Devlink E-Switch supports two modes of operation: legacy and switchdev.
- Legacy mode operates based on traditional MAC/VLAN steering rules. Switching
- decisions are made based on MAC addresses, VLANs, etc. There is limited ability
- to offload switching rules to hardware.
- On the other hand, switchdev mode allows for more advanced offloading
- capabilities of the E-Switch to hardware. In switchdev mode, more switching
- rules and logic can be offloaded to the hardware switch ASIC. It enables
- representor netdevices that represent the slow path of virtual functions (VFs)
- or scalable-functions (SFs) of the device. See more information about
- :ref:`Documentation/networking/switchdev.rst <switchdev>` and
- :ref:`Documentation/networking/representors.rst <representors>`.
- In addition, the devlink E-Switch also comes with other attributes listed
- in the following section.
- Attributes Description
- ======================
- The following is a list of E-Switch attributes.
- .. list-table:: E-Switch attributes
- :widths: 8 5 45
- * - Name
- - Type
- - Description
- * - ``mode``
- - enum
- - The mode of the device. The mode can be one of the following:
- * ``legacy`` operates based on traditional MAC/VLAN steering
- rules.
- * ``switchdev`` allows for more advanced offloading capabilities of
- the E-Switch to hardware.
- * - ``inline-mode``
- - enum
- - Some HWs need the VF driver to put part of the packet
- headers on the TX descriptor so the e-switch can do proper
- matching and steering. Support for both switchdev mode and legacy mode.
- * ``none`` none.
- * ``link`` L2 mode.
- * ``network`` L3 mode.
- * ``transport`` L4 mode.
- * - ``encap-mode``
- - enum
- - The encapsulation mode of the device. Support for both switchdev mode
- and legacy mode. The mode can be one of the following:
- * ``none`` Disable encapsulation support.
- * ``basic`` Enable encapsulation support.
- Example Usage
- =============
- .. code:: shell
- # enable switchdev mode
- $ devlink dev eswitch set pci/0000:08:00.0 mode switchdev
- # set inline-mode and encap-mode
- $ devlink dev eswitch set pci/0000:08:00.0 inline-mode none encap-mode basic
- # display devlink device eswitch attributes
- $ devlink dev eswitch show pci/0000:08:00.0
- pci/0000:08:00.0: mode switchdev inline-mode none encap-mode basic
- # enable encap-mode with legacy mode
- $ devlink dev eswitch set pci/0000:08:00.0 mode legacy inline-mode none encap-mode basic
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