diff options
| author | Jiri Pirko <jiri@nvidia.com> | 2026-03-12 13:04:05 +0300 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2026-03-14 23:08:50 +0300 |
| commit | 1850e76b38049548ecb03c62bb10d40b94eecaac (patch) | |
| tree | 8080ffaf22c436b6e34c3c063fd8a10f70cda793 /include/net | |
| parent | a4c6d53e5fd61829f707b7a723dd2937ed67c803 (diff) | |
| download | linux-1850e76b38049548ecb03c62bb10d40b94eecaac.tar.xz | |
devlink: introduce shared devlink instance for PFs on same chip
Multiple PFs may reside on the same physical chip, running a single
firmware. Some of the resources and configurations may be shared among
these PFs. Currently, there is no good object to pin the configuration
knobs on.
Introduce a shared devlink instance, instantiated upon probe of
the first PF and removed during remove of the last PF. The shared
devlink instance is not backed by any device device, as there is
no PCI device related to it.
The implementation uses reference counting to manage the lifecycle:
each PF that probes calls devlink_shd_get() to get or create
the shared instance, and calls devlink_shd_put() when it removes.
The shared instance is automatically destroyed when the last PF removes.
Example:
pci/0000:08:00.0: index 0
nested_devlink:
auxiliary/mlx5_core.eth.0
devlink_index/1: index 1
nested_devlink:
pci/0000:08:00.0
pci/0000:08:00.1
auxiliary/mlx5_core.eth.0: index 2
pci/0000:08:00.1: index 3
nested_devlink:
auxiliary/mlx5_core.eth.1
auxiliary/mlx5_core.eth.1: index 4
Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Link: https://patch.msgid.link/20260312100407.551173-12-jiri@resnulli.us
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'include/net')
| -rw-r--r-- | include/net/devlink.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/include/net/devlink.h b/include/net/devlink.h index 45dec7067a8e..3038af6ec017 100644 --- a/include/net/devlink.h +++ b/include/net/devlink.h @@ -1647,6 +1647,13 @@ void devlink_register(struct devlink *devlink); void devlink_unregister(struct devlink *devlink); void devlink_free(struct devlink *devlink); +struct devlink *devlink_shd_get(const char *id, + const struct devlink_ops *ops, + size_t priv_size, + const struct device_driver *driver); +void devlink_shd_put(struct devlink *devlink); +void *devlink_shd_get_priv(struct devlink *devlink); + /** * struct devlink_port_ops - Port operations * @port_split: Callback used to split the port into multiple ones. |