[patch net-next 04/10] devlink: Add relation between dpipe and resource

[Jiri Pirko <jiri@resnulli.us>]

From: Arkadi Sharshevsky <arkadis@mellanox.com>

The hardware processes which are modeled via dpipe commonly use some
internal hardware resources. Such relation can improve the understanding
of hardware limitations.

Signed-off-by: Arkadi Sharshevsky <arkadis@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
---
 include/net/devlink.h        | 13 +++++++++++++
 include/uapi/linux/devlink.h |  1 +
 net/core/devlink.c           | 31 +++++++++++++++++++++++++++++++
 3 files changed, 45 insertions(+)

diff --git a/include/net/devlink.h b/include/net/devlink.h
index 340c2fc..9217620 100644
--- a/include/net/devlink.h
+++ b/include/net/devlink.h
@@ -183,6 +183,8 @@ struct devlink_dpipe_table_ops;
  * @counters_enabled: indicates if counters are active
  * @counter_control_extern: indicates if counter control is in dpipe or
  *			    external tool
+ * @resource_valid: Indicate that the resource id is valid
+ * @resource_id: relative resource this table is related to
  * @table_ops: table operations
  * @rcu: rcu
  */
@@ -192,6 +194,8 @@ struct devlink_dpipe_table {
 	const char *name;
 	bool counters_enabled;
 	bool counter_control_extern;
+	bool resource_valid;
+	u64 resource_id;
 	struct devlink_dpipe_table_ops *table_ops;
 	struct rcu_head rcu;
 };
@@ -386,6 +390,8 @@ void devlink_resources_unregister(struct devlink *devlink,
 int devlink_resource_size_get(struct devlink *devlink,
 			      u64 resource_id,
 			      u64 *p_resource_size);
+int devlink_dpipe_table_resource_set(struct devlink *devlink,
+				     const char *table_name, u64 resource_id);
 
 #else
 
@@ -548,6 +554,13 @@ devlink_resource_size_get(struct devlink *devlink, u64 resource_id,
 	return -EOPNOTSUPP;
 }
 
+static inline int
+devlink_dpipe_table_resource_set(struct devlink *devlink,
+				 const char *table_name, u64 resource_id)
+{
+	return -EOPNOTSUPP;
+}
+
 #endif
 
 #endif /* _NET_DEVLINK_H_ */
diff --git a/include/uapi/linux/devlink.h b/include/uapi/linux/devlink.h
index bee827b..b84c6aa 100644
--- a/include/uapi/linux/devlink.h
+++ b/include/uapi/linux/devlink.h
@@ -217,6 +217,7 @@ enum devlink_attr {
 	DEVLINK_ATTR_RESOURCE_SIZE_VALID,	/* u8 */
 	DEVLINK_ATTR_RESOURCE_OCC,		/* u64 */
 	DEVLINK_ATTR_RESOURCE_ID,		/* u64 */
+	DEVLINK_ATTR_DPIPE_TABLE_RESOURCE_ID,	/* u64 */
 
 	/* add new attributes above here, update the policy in devlink.c */
 
diff --git a/net/core/devlink.c b/net/core/devlink.c
index 3dedc3f..8fbef2d 100644
--- a/net/core/devlink.c
+++ b/net/core/devlink.c
@@ -1686,6 +1686,9 @@ static int devlink_dpipe_table_put(struct sk_buff *skb,
 		       table->counters_enabled))
 		goto nla_put_failure;
 
+	if (table->resource_valid)
+		nla_put_u64_64bit(skb, DEVLINK_ATTR_DPIPE_TABLE_RESOURCE_ID,
+				  table->resource_id, DEVLINK_ATTR_PAD);
 	if (devlink_dpipe_matches_put(table, skb))
 		goto nla_put_failure;
 
@@ -3234,6 +3237,34 @@ int devlink_resource_size_get(struct devlink *devlink,
 }
 EXPORT_SYMBOL_GPL(devlink_resource_size_get);
 
+/**
+ *	devlink_dpipe_table_resource_set - set the resource id
+ *
+ *	@devlink: devlink
+ *	@table_name: table name
+ *	@resource_id: resource id
+ */
+int devlink_dpipe_table_resource_set(struct devlink *devlink,
+				     const char *table_name, u64 resource_id)
+{
+	struct devlink_dpipe_table *table;
+	int err = 0;
+
+	mutex_lock(&devlink->lock);
+	table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
+					 table_name);
+	if (!table) {
+		err = -EINVAL;
+		goto out;
+	}
+	table->resource_id = resource_id;
+	table->resource_valid = true;
+out:
+	mutex_unlock(&devlink->lock);
+	return err;
+}
+EXPORT_SYMBOL_GPL(devlink_dpipe_table_resource_set);
+
 static int __init devlink_module_init(void)
 {
 	return genl_register_family(&devlink_nl_family);
-- 
2.9.5