[PATCH net-next V5 00/12] devlink: add per-port resource support

Tariq Toukan
2026-04-07T19:42:07Z

Hi,

This series by Or 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 refactors resource functions to be generic
Patch #2 adds port-level resource registration infrastructure
Patch #3 registers SF resource on PF port representor in mlx5
Patch #4 adds devlink port resource registration to netdevsim for testing
Patch #5 adds dump support for device-level resources
Patch #6 includes port resources in the resource dump dumpit path
Patch #7 adds port-specific option to resource dump doit path
Patch #8 adds selftest for devlink port resource doit
Patch #9 documents port-level resources and full dump
Patch #10 adds resource scope filtering to resource dump
Patch #11 adds selftest for resource dump and scope filter
Patch #12 documents resource scope filtering

Userspace patches for iproute2:
https://github.com/ohartoov/iproute2/tree/port_resources

V5:
- Link to V4:
https://lore.kernel.org/all/20260401184947.135205-1-tariqt@nvidia.com/
- Change resource scope attribute from bitmask to u32
- Remove max value and valid mask define for scope attribute
- Handle the case where a device is unregistered or a port is removed
in the middle of a multi-callback dump (Sashiko's comment)
- Replace port_number with port_index and add an index_valid bool to
the dump state to track the port resources phase of the dump
(Sashiko's comment)

Or Har-Toov (12):
devlink: Refactor resource functions to be generic
devlink: Add port-level resource registration infrastructure
net/mlx5: Register SF resource on PF port representor
netdevsim: Add devlink port resource registration
devlink: Add dump support for device-level resources
devlink: Include port resources in resource dump dumpit
devlink: Add port-specific option to resource dump doit
selftest: netdevsim: Add devlink port resource doit test
devlink: Document port-level resources and full dump
devlink: Add resource scope filtering to resource dump
selftest: netdevsim: Add resource dump and scope filter test
devlink: Document resource scope filtering

Documentation/netlink/specs/devlink.yaml | 32 +-
.../networking/devlink/devlink-resource.rst | 70 ++++
.../net/ethernet/mellanox/mlx5/core/devlink.h | 4 +
.../mellanox/mlx5/core/esw/devlink_port.c | 37 +++
drivers/net/netdevsim/dev.c | 23 +-
drivers/net/netdevsim/netdevsim.h | 4 +
include/net/devlink.h | 10 +-
include/uapi/linux/devlink.h | 11 +
net/devlink/devl_internal.h | 5 +
net/devlink/netlink.c | 2 +
net/devlink/netlink_gen.c | 24 +-
net/devlink/netlink_gen.h | 8 +-
net/devlink/port.c | 2 +
net/devlink/resource.c | 314 +++++++++++++++---
.../drivers/net/netdevsim/devlink.sh | 79 ++++-
15 files changed, 568 insertions(+), 57 deletions(-)

base-commit: c149d90e260ca1b6b9175468955a15c4d95a9f3b
--
2.44.0