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docs: fix info about representor identification

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Update the "How are representors identified?" documentation
subchapter. For newer kernels driver should use
SET_NETDEV_DEVLINK_PORT instead of ndo_get_devlink_port()
callback.

Fixes: 7712b3e966 ("Merge branch 'net-fix-netdev-to-devlink_port-linkage-and-expose-to-user'")
Signed-off-by: Mateusz Polchlopek <mateusz.polchlopek@intel.com>
Reviewed-by: Wojciech Drewek <wojciech.drewek@intel.com>
Reviewed-by: Przemek Kitszel <przemyslaw.kitszel@intel.com>
Reviewed-by: Edward Cree <ecree.xilinx@gmail.com>
Link: https://lore.kernel.org/r/20231012123144.15768-1-mateusz.polchlopek@intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Mateusz Polchlopek 2023-10-12 08:31:44 -04:00 committed by Jakub Kicinski
parent 0f4d44f6ee
commit a258c804aa
1 changed files with 5 additions and 3 deletions
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8
Documentation/networking/representors.rst
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@ -162,9 +162,11 @@ How are representors identified?
The representor netdevice should *not* directly refer to a PCIe device (e.g.
through ``net_dev->dev.parent`` / ``SET_NETDEV_DEV()``), either of the
representee or of the switchdev function.
Instead, it should implement the ``ndo_get_devlink_port()`` netdevice op, which
the kernel uses to provide the ``phys_switch_id`` and ``phys_port_name`` sysfs
nodes. (Some legacy drivers implement ``ndo_get_port_parent_id()`` and
Instead, the driver should use the ``SET_NETDEV_DEVLINK_PORT`` macro to
assign a devlink port instance to the netdevice before registering the
netdevice; the kernel uses the devlink port to provide the ``phys_switch_id``
and ``phys_port_name`` sysfs nodes.
(Some legacy drivers implement ``ndo_get_port_parent_id()`` and
``ndo_get_phys_port_name()`` directly, but this is deprecated.) See
:ref:`Documentation/networking/devlink/devlink-port.rst <devlink_port>` for the
details of this API.