From: Parav Pandit <parav@nvidia.com>

Date: Tue, 10 Aug 2021 16:24:17 +0300

Subject: devlink: Add new "enable_vnet" generic device param

Patch-mainline: v5.15-rc1

Git-commit: 076b2a9dbb28e8b3d9a264a8bca664794255d448

References: jsc#SLE-19253

Add new device generic parameter to enable/disable creation of

VDPA net 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_vnet value false cmode driverinit

$ devlink dev reload pci/0000:06:00.0

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

VDPA net functionality.

Signed-off-by: Parav Pandit <parav@nvidia.com>

Reviewed-by: Jiri Pirko <jiri@nvidia.com>

Reviewed-by: Leon Romanovsky <leonro@nvidia.com>

Signed-off-by: David S. Miller <davem@davemloft.net>

Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>

---

 Documentation/networking/devlink/devlink-params.rst |    4 ++++

 include/net/devlink.h                               |    4 ++++

 net/core/devlink.c                                  |    5 +++++

 3 files changed, 13 insertions(+)

--- a/Documentation/networking/devlink/devlink-params.rst

+++ b/Documentation/networking/devlink/devlink-params.rst

@@ -105,6 +105,10 @@ own name.

      - Boolean

      - When enabled, the device driver will instantiate RDMA specific

        auxiliary device of the devlink device.

+   * - ``enable_vnet``

+     - Boolean

+     - When enabled, the device driver will instantiate VDPA networking

+       specific auxiliary device of the devlink device.

    * - ``internal_err_reset``

      - Boolean

      - When enabled, the device driver will reset the device on internal

--- a/include/net/devlink.h

+++ b/include/net/devlink.h

@@ -523,6 +523,7 @@ enum devlink_param_generic_id {

 	DEVLINK_PARAM_GENERIC_ID_ENABLE_REMOTE_DEV_RESET,

 	DEVLINK_PARAM_GENERIC_ID_ENABLE_ETH,

 	DEVLINK_PARAM_GENERIC_ID_ENABLE_RDMA,

+	DEVLINK_PARAM_GENERIC_ID_ENABLE_VNET,

 	/* add new param generic ids above here*/

 	__DEVLINK_PARAM_GENERIC_ID_MAX,

@@ -569,6 +570,9 @@ enum devlink_param_generic_id {

 #define DEVLINK_PARAM_GENERIC_ENABLE_RDMA_NAME "enable_rdma"

 #define DEVLINK_PARAM_GENERIC_ENABLE_RDMA_TYPE DEVLINK_PARAM_TYPE_BOOL

+#define DEVLINK_PARAM_GENERIC_ENABLE_VNET_NAME "enable_vnet"

+#define DEVLINK_PARAM_GENERIC_ENABLE_VNET_TYPE DEVLINK_PARAM_TYPE_BOOL

+

 #define DEVLINK_PARAM_GENERIC(_id, _cmodes, _get, _set, _validate)	\

 {									\

 	.id = DEVLINK_PARAM_GENERIC_ID_##_id,				\

--- a/net/core/devlink.c

+++ b/net/core/devlink.c

@@ -4300,6 +4300,11 @@ static const struct devlink_param devlin

 		.name = DEVLINK_PARAM_GENERIC_ENABLE_RDMA_NAME,

 		.type = DEVLINK_PARAM_GENERIC_ENABLE_RDMA_TYPE,

 	},

+	{

+		.id = DEVLINK_PARAM_GENERIC_ID_ENABLE_VNET,

+		.name = DEVLINK_PARAM_GENERIC_ENABLE_VNET_NAME,

+		.type = DEVLINK_PARAM_GENERIC_ENABLE_VNET_TYPE,

+	},

 };

 static int devlink_param_generic_verify(const struct devlink_param *param)