[PATCH RESEND net-next 01/10] devlink: Add new "enable_eth" generic device param

[Parav Pandit <parav@nvidia.com>]

Add new device generic parameter to enable/disable creation of
Ethernet auxiliary device and associated device functionality
in the devlink instance.

User who prefers to disable such functionality can disable it using below
example.

$ devlink dev param set pci/0000:06:00.0 \
              name enable_eth value false cmode driverinit
$ devlink dev reload pci/0000:06:00.0

At this point devlink instance do not create auxiliary device for the
Ethernet functionality.

Signed-off-by: Parav Pandit <parav@nvidia.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
---
 Documentation/networking/devlink/devlink-params.rst | 4 ++++
 include/net/devlink.h                               | 4 ++++
 net/core/devlink.c                                  | 5 +++++
 3 files changed, 13 insertions(+)

diff --git a/Documentation/networking/devlink/devlink-params.rst b/Documentation/networking/devlink/devlink-params.rst
index 54c9f107c4b0..219c1272f2d6 100644
--- a/Documentation/networking/devlink/devlink-params.rst
+++ b/Documentation/networking/devlink/devlink-params.rst
@@ -97,6 +97,10 @@ own name.
    * - ``enable_roce``
      - Boolean
      - Enable handling of RoCE traffic in the device.
+   * - ``enable_eth``
+     - Boolean
+     - When enabled, the device driver will instantiate Ethernet specific
+       auxiliary device of the devlink device.
    * - ``internal_err_reset``
      - Boolean
      - When enabled, the device driver will reset the device on internal
diff --git a/include/net/devlink.h b/include/net/devlink.h
index 0236c77f2fd0..1e3e183bb2c2 100644
--- a/include/net/devlink.h
+++ b/include/net/devlink.h
@@ -519,6 +519,7 @@ enum devlink_param_generic_id {
 	DEVLINK_PARAM_GENERIC_ID_RESET_DEV_ON_DRV_PROBE,
 	DEVLINK_PARAM_GENERIC_ID_ENABLE_ROCE,
 	DEVLINK_PARAM_GENERIC_ID_ENABLE_REMOTE_DEV_RESET,
+	DEVLINK_PARAM_GENERIC_ID_ENABLE_ETH,
 
 	/* add new param generic ids above here*/
 	__DEVLINK_PARAM_GENERIC_ID_MAX,
@@ -559,6 +560,9 @@ enum devlink_param_generic_id {
 #define DEVLINK_PARAM_GENERIC_ENABLE_REMOTE_DEV_RESET_NAME "enable_remote_dev_reset"
 #define DEVLINK_PARAM_GENERIC_ENABLE_REMOTE_DEV_RESET_TYPE DEVLINK_PARAM_TYPE_BOOL
 
+#define DEVLINK_PARAM_GENERIC_ENABLE_ETH_NAME "enable_eth"
+#define DEVLINK_PARAM_GENERIC_ENABLE_ETH_TYPE DEVLINK_PARAM_TYPE_BOOL
+
 #define DEVLINK_PARAM_GENERIC(_id, _cmodes, _get, _set, _validate)	\
 {									\
 	.id = DEVLINK_PARAM_GENERIC_ID_##_id,				\
diff --git a/net/core/devlink.c b/net/core/devlink.c
index b02d54ab59ac..9a59f45c8bf9 100644
--- a/net/core/devlink.c
+++ b/net/core/devlink.c
@@ -4277,6 +4277,11 @@ static const struct devlink_param devlink_param_generic[] = {
 		.name = DEVLINK_PARAM_GENERIC_ENABLE_REMOTE_DEV_RESET_NAME,
 		.type = DEVLINK_PARAM_GENERIC_ENABLE_REMOTE_DEV_RESET_TYPE,
 	},
+	{
+		.id = DEVLINK_PARAM_GENERIC_ID_ENABLE_ETH,
+		.name = DEVLINK_PARAM_GENERIC_ENABLE_ETH_NAME,
+		.type = DEVLINK_PARAM_GENERIC_ENABLE_ETH_TYPE,
+	},
 };
 
 static int devlink_param_generic_verify(const struct devlink_param *param)
-- 
2.26.2