netdev - [PATCH net-next 0/5] devlink: add per-port resource support

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Message-ID: <20260203071033.1709445-1-tariqt@nvidia.com>
Date: Tue, 3 Feb 2026 09:10:28 +0200
From: Tariq Toukan <tariqt@...dia.com>
To: Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>, Andrew Lunn <andrew+netdev@...n.ch>, "David
 S. Miller" <davem@...emloft.net>
CC: Donald Hunter <donald.hunter@...il.com>, Jiri Pirko <jiri@...nulli.us>,
	Jonathan Corbet <corbet@....net>, Saeed Mahameed <saeedm@...dia.com>, "Leon
 Romanovsky" <leon@...nel.org>, Tariq Toukan <tariqt@...dia.com>, Mark Bloch
	<mbloch@...dia.com>, Shuah Khan <shuah@...nel.org>, <netdev@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, <linux-doc@...r.kernel.org>,
	<linux-rdma@...r.kernel.org>, <linux-kselftest@...r.kernel.org>, Gal Pressman
	<gal@...dia.com>, Moshe Shemesh <moshe@...dia.com>, Shay Drori
	<shayd@...dia.com>, Jiri Pirko <jiri@...dia.com>
Subject: [PATCH net-next 0/5] devlink: add per-port resource support

Hi,

This series adds devlink per-port resource support.
See detailed description by Or below [1].

Regards,
Tariq

[1]
Currently, devlink resources are only available at the device level.
However, some resources are inherently per-port, such as the maximum
number of subfunctions (SFs) that can be created on a specific PF port.
This limitation prevents user space from obtaining accurate per-port
capacity information.
This series adds infrastructure for per-port resources in devlink core
and implements it in the mlx5 driver to expose the max_SFs resource
on PF devlink ports.

Patch #1 adds devlink core infrastructure for per-port resources
Patch #2 registers SF resource on PF port representor in mlx5
         support dump
Patch #3 adds port resource registration to netdevsim for testing
Patch #4 adds selftest for devlink port resources
Patch #5 adds documentation for port-level resources

With this series (and upcoming userspace patches), users can query
per-port resources:

$ devlink port resource show pci/0000:03:00.0/196608
pci/0000:03:00.0/196608:
  name max_SFs size 20 unit entry

$ devlink port resource show
pci/0000:03:00.0/196608:
  name max_SFs size 20 unit entry
pci/0000:03:00.1/262144:
  name max_SFs size 20 unit entry

Or Har-Toov (5):
  devlink: Add port-level resource infrastructure
  net/mlx5: Register SF resource on PF port representor
  netdevsim: Add devlink port resource registration
  selftest: netdevsim: Add devlink port resource test
  devlink: Document port-level resources

 Documentation/netlink/specs/devlink.yaml      |  23 ++
 .../networking/devlink/devlink-resource.rst   |  36 +++
 .../net/ethernet/mellanox/mlx5/core/devlink.h |   4 +
 .../mellanox/mlx5/core/esw/devlink_port.c     |  37 +++
 drivers/net/netdevsim/dev.c                   |  22 +-
 drivers/net/netdevsim/netdevsim.h             |   4 +
 include/net/devlink.h                         |   8 +
 include/uapi/linux/devlink.h                  |   2 +
 net/devlink/netlink.c                         |   2 +-
 net/devlink/netlink_gen.c                     |  32 +-
 net/devlink/netlink_gen.h                     |   6 +-
 net/devlink/port.c                            |   3 +
 net/devlink/resource.c                        | 282 ++++++++++++++----
 .../drivers/net/netdevsim/devlink.sh          |  32 +-
 14 files changed, 434 insertions(+), 59 deletions(-)


base-commit: a22f57757f7e88c890499265c383ecb32900b645
-- 
2.40.1