82 lines
2.6 KiB
ReStructuredText
82 lines
2.6 KiB
ReStructuredText
.. SPDX-License-Identifier: GPL-2.0
|
|
|
|
==============
|
|
Devlink Reload
|
|
==============
|
|
|
|
``devlink-reload`` provides mechanism to reinit driver entities, applying
|
|
``devlink-params`` and ``devlink-resources`` new values. It also provides
|
|
mechanism to activate firmware.
|
|
|
|
Reload Actions
|
|
==============
|
|
|
|
User may select a reload action.
|
|
By default ``driver_reinit`` action is selected.
|
|
|
|
.. list-table:: Possible reload actions
|
|
:widths: 5 90
|
|
|
|
* - Name
|
|
- Description
|
|
* - ``driver-reinit``
|
|
- Devlink driver entities re-initialization, including applying
|
|
new values to devlink entities which are used during driver
|
|
load such as ``devlink-params`` in configuration mode
|
|
``driverinit`` or ``devlink-resources``
|
|
* - ``fw_activate``
|
|
- Firmware activate. Activates new firmware if such image is stored and
|
|
pending activation. If no limitation specified this action may involve
|
|
firmware reset. If no new image pending this action will reload current
|
|
firmware image.
|
|
|
|
Note that even though user asks for a specific action, the driver
|
|
implementation might require to perform another action alongside with
|
|
it. For example, some driver do not support driver reinitialization
|
|
being performed without fw activation. Therefore, the devlink reload
|
|
command returns the list of actions which were actrually performed.
|
|
|
|
Reload Limits
|
|
=============
|
|
|
|
By default reload actions are not limited and driver implementation may
|
|
include reset or downtime as needed to perform the actions.
|
|
|
|
However, some drivers support action limits, which limit the action
|
|
implementation to specific constraints.
|
|
|
|
.. list-table:: Possible reload limits
|
|
:widths: 5 90
|
|
|
|
* - Name
|
|
- Description
|
|
* - ``no_reset``
|
|
- No reset allowed, no down time allowed, no link flap and no
|
|
configuration is lost.
|
|
|
|
Change Namespace
|
|
================
|
|
|
|
The netns option allows user to be able to move devlink instances into
|
|
namespaces during devlink reload operation.
|
|
By default all devlink instances are created in init_net and stay there.
|
|
|
|
example usage
|
|
-------------
|
|
|
|
.. code:: shell
|
|
|
|
$ devlink dev reload help
|
|
$ devlink dev reload DEV [ netns { PID | NAME | ID } ] [ action { driver_reinit | fw_activate } ] [ limit no_reset ]
|
|
|
|
# Run reload command for devlink driver entities re-initialization:
|
|
$ devlink dev reload pci/0000:82:00.0 action driver_reinit
|
|
reload_actions_performed:
|
|
driver_reinit
|
|
|
|
# Run reload command to activate firmware:
|
|
# Note that mlx5 driver reloads the driver while activating firmware
|
|
$ devlink dev reload pci/0000:82:00.0 action fw_activate
|
|
reload_actions_performed:
|
|
driver_reinit fw_activate
|