From: Parav Pandit <parav@nvidia.com>
Date: Tue, 10 Aug 2021 16:24:20 +0300
Subject: devlink: Add APIs to publish, unpublish individual parameter
Patch-mainline: v5.15-rc1
Git-commit: 9c4a7665b4237621879caf115a78f69bad67b9c7
References: jsc#SLE-19253

Enable drivers to publish/unpublish individual parameter.

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>
---
 include/net/devlink.h |    4 ++++
 net/core/devlink.c    |   48 ++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 52 insertions(+)

--- a/include/net/devlink.h
+++ b/include/net/devlink.h
@@ -1633,6 +1633,10 @@ void devlink_param_unregister(struct dev
 			      const struct devlink_param *param);
 void devlink_params_publish(struct devlink *devlink);
 void devlink_params_unpublish(struct devlink *devlink);
+void devlink_param_publish(struct devlink *devlink,
+			   const struct devlink_param *param);
+void devlink_param_unpublish(struct devlink *devlink,
+			     const struct devlink_param *param);
 int devlink_port_params_register(struct devlink_port *devlink_port,
 				 const struct devlink_param *params,
 				 size_t params_count);
--- a/net/core/devlink.c
+++ b/net/core/devlink.c
@@ -9983,6 +9983,54 @@ void devlink_params_unpublish(struct dev
 EXPORT_SYMBOL_GPL(devlink_params_unpublish);
 
 /**
+ * devlink_param_publish - publish one configuration parameter
+ *
+ * @devlink: devlink
+ * @param: one configuration parameter
+ *
+ * Publish previously registered configuration parameter.
+ */
+void devlink_param_publish(struct devlink *devlink,
+			   const struct devlink_param *param)
+{
+	struct devlink_param_item *param_item;
+
+	list_for_each_entry(param_item, &devlink->param_list, list) {
+		if (param_item->param != param || param_item->published)
+			continue;
+		param_item->published = true;
+		devlink_param_notify(devlink, 0, param_item,
+				     DEVLINK_CMD_PARAM_NEW);
+		break;
+	}
+}
+EXPORT_SYMBOL_GPL(devlink_param_publish);
+
+/**
+ * devlink_param_unpublish - unpublish one configuration parameter
+ *
+ * @devlink: devlink
+ * @param: one configuration parameter
+ *
+ * Unpublish previously registered configuration parameter.
+ */
+void devlink_param_unpublish(struct devlink *devlink,
+			     const struct devlink_param *param)
+{
+	struct devlink_param_item *param_item;
+
+	list_for_each_entry(param_item, &devlink->param_list, list) {
+		if (param_item->param != param || !param_item->published)
+			continue;
+		param_item->published = false;
+		devlink_param_notify(devlink, 0, param_item,
+				     DEVLINK_CMD_PARAM_DEL);
+		break;
+	}
+}
+EXPORT_SYMBOL_GPL(devlink_param_unpublish);
+
+/**
  *	devlink_port_params_register - register port configuration parameters
  *
  *	@devlink_port: devlink port