Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) .. SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3) ==============
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4) Devlink Reload
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) ==============
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) ``devlink-reload`` provides mechanism to reinit driver entities, applying
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) ``devlink-params`` and ``devlink-resources`` new values. It also provides
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) mechanism to activate firmware.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) Reload Actions
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) ==============
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) User may select a reload action.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) By default ``driver_reinit`` action is selected.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) .. list-table:: Possible reload actions
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)    :widths: 5 90
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)    * - Name
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)      - Description
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)    * - ``driver-reinit``
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23)      - Devlink driver entities re-initialization, including applying
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)        new values to devlink entities which are used during driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)        load such as ``devlink-params`` in configuration mode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)        ``driverinit`` or ``devlink-resources``
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)    * - ``fw_activate``
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28)      - Firmware activate. Activates new firmware if such image is stored and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)        pending activation. If no limitation specified this action may involve
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)        firmware reset. If no new image pending this action will reload current
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)        firmware image.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) Note that even though user asks for a specific action, the driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) implementation might require to perform another action alongside with
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) it. For example, some driver do not support driver reinitialization
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) being performed without fw activation. Therefore, the devlink reload
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) command returns the list of actions which were actrually performed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) Reload Limits
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) =============
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) By default reload actions are not limited and driver implementation may
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) include reset or downtime as needed to perform the actions.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) However, some drivers support action limits, which limit the action
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) implementation to specific constraints.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) .. list-table:: Possible reload limits
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)    :widths: 5 90
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)    * - Name
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)      - Description
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)    * - ``no_reset``
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)      - No reset allowed, no down time allowed, no link flap and no
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)        configuration is lost.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) Change Namespace
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) ================
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) The netns option allows user to be able to move devlink instances into
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) namespaces during devlink reload operation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) By default all devlink instances are created in init_net and stay there.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) example usage
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) -------------
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) .. code:: shell
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)     $ devlink dev reload help
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70)     $ devlink dev reload DEV [ netns { PID | NAME | ID } ] [ action { driver_reinit | fw_activate } ] [ limit no_reset ]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72)     # Run reload command for devlink driver entities re-initialization:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73)     $ devlink dev reload pci/0000:82:00.0 action driver_reinit
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74)     reload_actions_performed:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75)       driver_reinit
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77)     # Run reload command to activate firmware:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78)     # Note that mlx5 driver reloads the driver while activating firmware
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79)     $ devlink dev reload pci/0000:82:00.0 action fw_activate
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80)     reload_actions_performed:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)       driver_reinit fw_activate