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From: Jiri Pirko <jiri@resnulli.us>
To: Moshe Shemesh <moshe@nvidia.com>
Cc: Moshe Shemesh <moshe@mellanox.com>,
	"David S. Miller" <davem@davemloft.net>,
	Jakub Kicinski <kuba@kernel.org>, Jiri Pirko <jiri@mellanox.com>,
	netdev@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH net-next RFC v2 13/13] devlink: Add Documentation/networking/devlink/devlink-reload.rst
Date: Tue, 18 Aug 2020 13:07:40 +0200	[thread overview]
Message-ID: <20200818110740.GC2627@nanopsycho> (raw)
In-Reply-To: <a786a68d-df60-cae3-5fb1-3648ca1c69d8@nvidia.com>

Tue, Aug 18, 2020 at 11:14:16AM CEST, moshe@nvidia.com wrote:
>
>On 8/17/2020 7:39 PM, Jiri Pirko wrote:
>> Mon, Aug 17, 2020 at 11:37:52AM CEST, moshe@mellanox.com wrote:
>> > Add devlink reload rst documentation file.
>> > Update index file to include it.
>> > 
>> > Signed-off-by: Moshe Shemesh <moshe@mellanox.com>
>> > ---
>> > - Instead of reload levels driver,fw_reset,fw_live_patch have reload
>> >   actions driver_reinit,fw_activate,fw_live_patch
>> > ---
>> > .../networking/devlink/devlink-reload.rst     | 54 +++++++++++++++++++
>> > Documentation/networking/devlink/index.rst    |  1 +
>> > 2 files changed, 55 insertions(+)
>> > create mode 100644 Documentation/networking/devlink/devlink-reload.rst
>> > 
>> > diff --git a/Documentation/networking/devlink/devlink-reload.rst b/Documentation/networking/devlink/devlink-reload.rst
>> > new file mode 100644
>> > index 000000000000..9846ea727f3b
>> > --- /dev/null
>> > +++ b/Documentation/networking/devlink/devlink-reload.rst
>> > @@ -0,0 +1,54 @@
>> > +.. SPDX-License-Identifier: GPL-2.0
>> > +
>> > +==============
>> > +Devlink Reload
>> > +==============
>> > +
>> > +``devlink-reload`` provides mechanism to either reload driver entities,
>> > +applying ``devlink-params`` and ``devlink-resources`` new values or firmware
>> > +activation depends on reload action selected.
>> > +
>> > +Reload actions
>> > +=============
>> > +
>> > +User may select a reload action.
>> > +By default ``driver_reinit`` action is done.
>> > +
>> > +.. list-table:: Possible reload actions
>> > +   :widths: 5 90
>> > +
>> > +   * - Name
>> > +     - Description
>> > +   * - ``driver-reinit``
>> > +     - 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. Can be used for firmware reload or firmware
>> > +       upgrade if new firmware is stored and driver supports such
>> > +       firmware upgrade.
>> Does this do the same as "driver-reinit" + fw activation? If yes, it
>> should be written here. If no, it should be written here as well.
>> 
>
>No, The only thing required here is the action of firmware activation. If a
>driver needs to do reload to make that happen and do reinit that's ok, but
>not required.

What does the "FW activation" mean? I believe that this needs explicit
documentation here.


>
>> > +   * - ``fw_live_patch``
>> > +     - Firmware live patch, applies firmware changes without reset.
>> > +
>> > +Change namespace
>> > +================
>> > +
>> > +All devlink instances are created in init_net and stay there for a
>> > +lifetime. Allow user to be able to move devlink instances into
>> > +namespaces during devlink reload operation. That ensures proper
>> > +re-instantiation of driver objects, including netdevices.
>> > +
>> > +example usage
>> > +-------------
>> > +
>> > +.. code:: shell
>> > +
>> > +    $ devlink dev reload help
>> > +    $ devlink dev reload DEV [ netns { PID | NAME | ID } ] [ action { fw_live_patch | driver_reinit | fw_activate } ]
>> > +
>> > +    # Run reload command for devlink driver entities re-initialization:
>> > +    $ devlink dev reload pci/0000:82:00.0 action driver_reinit
>> > +
>> > +    # Run reload command to activate firmware:
>> > +    $ devlink dev reload pci/0000:82:00.0 action fw_activate
>> > diff --git a/Documentation/networking/devlink/index.rst b/Documentation/networking/devlink/index.rst
>> > index 7684ae5c4a4a..d82874760ae2 100644
>> > --- a/Documentation/networking/devlink/index.rst
>> > +++ b/Documentation/networking/devlink/index.rst
>> > @@ -20,6 +20,7 @@ general.
>> >     devlink-params
>> >     devlink-region
>> >     devlink-resource
>> > +   devlink-reload
>> >     devlink-trap
>> > 
>> > Driver-specific documentation
>> > -- 
>> > 2.17.1
>> > 

  reply	other threads:[~2020-08-18 11:07 UTC|newest]

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-08-17  9:37 [PATCH net-next RFC v2 00/13] Add devlink reload action option Moshe Shemesh
2020-08-17  9:37 ` [PATCH net-next RFC v2 01/13] devlink: Add reload action option to devlink reload command Moshe Shemesh
2020-08-17 16:16   ` Jakub Kicinski
2020-08-18  9:06     ` Moshe Shemesh
2020-08-18 15:37       ` Jakub Kicinski
2020-08-17 16:36   ` Jiri Pirko
2020-08-18  9:10     ` Moshe Shemesh
2020-08-19  0:10       ` Jakub Kicinski
2020-08-19 12:18         ` Moshe Shemesh
2020-08-19 12:46           ` Jiri Pirko
2020-08-19 14:23             ` Moshe Shemesh
2020-08-19 15:18               ` Jiri Pirko
2020-08-19 16:25                 ` Jakub Kicinski
2020-08-19 18:55                   ` Jiri Pirko
2020-08-17  9:37 ` [PATCH net-next RFC v2 02/13] devlink: Add supported reload actions to dev get Moshe Shemesh
2020-08-17  9:37 ` [PATCH net-next RFC v2 03/13] net/mlx5: Add functions to set/query MFRL register Moshe Shemesh
2020-08-17  9:37 ` [PATCH net-next RFC v2 04/13] net/mlx5: Set cap for pci sync for fw update event Moshe Shemesh
2020-08-17  9:37 ` [PATCH net-next RFC v2 05/13] net/mlx5: Handle sync reset request event Moshe Shemesh
2020-08-17  9:37 ` [PATCH net-next RFC v2 06/13] net/mlx5: Handle sync reset now event Moshe Shemesh
2020-08-17  9:37 ` [PATCH net-next RFC v2 07/13] net/mlx5: Handle sync reset abort event Moshe Shemesh
2020-08-17  9:37 ` [PATCH net-next RFC v2 08/13] net/mlx5: Add support for devlink reload action fw activate Moshe Shemesh
2020-08-17  9:37 ` [PATCH net-next RFC v2 09/13] devlink: Add enable_remote_dev_reset generic parameter Moshe Shemesh
2020-08-17  9:37 ` [PATCH net-next RFC v2 10/13] net/mlx5: Add devlink param enable_remote_dev_reset support Moshe Shemesh
2020-08-17  9:37 ` [PATCH net-next RFC v2 11/13] net/mlx5: Add support for fw live patch event Moshe Shemesh
2020-08-17  9:37 ` [PATCH net-next RFC v2 12/13] net/mlx5: Add support for devlink reload action live patch Moshe Shemesh
2020-08-17  9:37 ` [PATCH net-next RFC v2 13/13] devlink: Add Documentation/networking/devlink/devlink-reload.rst Moshe Shemesh
2020-08-17 16:39   ` Jiri Pirko
2020-08-18  9:14     ` Moshe Shemesh
2020-08-18 11:07       ` Jiri Pirko [this message]
2020-08-18 20:04         ` Moshe Shemesh

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