devlink: Add relation between dpipe and resource

The hardware processes which are modeled via dpipe commonly use some
internal hardware resources. Such relation can improve the understanding
of hardware limitations. The number of resource's unit consumed per
table's entry are also provided for each table.

Signed-off-by: Arkadi Sharshevsky <arkadis@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 37 insertions, 0 deletions

diff --git a/net/core/devlink.c b/net/core/devlink.c
index 4c3d85560436..dd7d6dd07bfb 100644
--- a/net/core/devlink.c
+++ b/net/core/devlink.c
@@ -1694,6 +1694,12 @@ 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);
+                nla_put_u64_64bit(skb, DEVLINK_ATTR_DPIPE_TABLE_RESOURCE_UNITS,
+                                  table->resource_units, DEVLINK_ATTR_PAD);
+        }
         if (devlink_dpipe_matches_put(table, skb))
                 goto nla_put_failure;
 
@@ -3254,6 +3260,37 @@ out:
 }
 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
+ *      @resource_units: number of resource's units consumed per table's entry
+ */
+int devlink_dpipe_table_resource_set(struct devlink *devlink,
+                                     const char *table_name, u64 resource_id,
+                                     u64 resource_units)
+{
+        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_units = resource_units;
+        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);