[v10,06/16] graph: introduce graph bind unbind API

diff --git a/lib/graph/graph.c b/lib/graph/graph.c
index 5582631b53..8d5bd8b9ae 100644
--- a/lib/graph/graph.c
+++ b/lib/graph/graph.c
@@ -260,6 +260,65 @@  graph_mem_fixup_secondary(struct rte_graph *graph)
 	return graph_mem_fixup_node_ctx(graph);
 }
 
+static bool
+graph_src_node_avail(struct graph *graph)
+{
+	struct graph_node *graph_node;
+
+	STAILQ_FOREACH(graph_node, &graph->node_list, next)
+		if ((graph_node->node->flags & RTE_NODE_SOURCE_F) &&
+		    (graph_node->node->lcore_id == RTE_MAX_LCORE ||
+		     graph->lcore_id == graph_node->node->lcore_id))
+			return true;
+
+	return false;
+}
+
+int
+rte_graph_model_mcore_dispatch_core_bind(rte_graph_t id, int lcore)
+{
+	struct graph *graph;
+
+	GRAPH_ID_CHECK(id);
+	if (!rte_lcore_is_enabled(lcore))
+		SET_ERR_JMP(ENOLINK, fail, "lcore %d not enabled", lcore);
+
+	STAILQ_FOREACH(graph, &graph_list, next)
+		if (graph->id == id)
+			break;
+
+	if (graph->graph->model == RTE_GRAPH_MODEL_MCORE_DISPATCH)
+		goto fail;
+
+	graph->lcore_id = lcore;
+	graph->socket = rte_lcore_to_socket_id(lcore);
+
+	/* check the availability of source node */
+	if (!graph_src_node_avail(graph))
+		graph->graph->head = 0;
+
+	return 0;
+
+fail:
+	return -rte_errno;
+}
+
+void
+rte_graph_model_mcore_dispatch_core_unbind(rte_graph_t id)
+{
+	struct graph *graph;
+
+	GRAPH_ID_CHECK(id);
+	STAILQ_FOREACH(graph, &graph_list, next)
+		if (graph->id == id)
+			break;
+
+	graph->lcore_id = RTE_MAX_LCORE;
+
+fail:
+	return;
+}
+
 struct rte_graph *
 rte_graph_lookup(const char *name)
 {
@@ -346,6 +405,7 @@  rte_graph_create(const char *name, struct rte_graph_param *prm)
 	graph->src_node_count = src_node_count;
 	graph->node_count = graph_nodes_count(graph);
 	graph->id = graph_id;
+	graph->lcore_id = RTE_MAX_LCORE;
 	graph->num_pkt_to_capture = prm->num_pkt_to_capture;
 	if (prm->pcap_filename)
 		rte_strscpy(graph->pcap_filename, prm->pcap_filename, RTE_GRAPH_PCAP_FILE_SZ);
diff --git a/lib/graph/graph_private.h b/lib/graph/graph_private.h
index ea4409448d..6d2137c81b 100644
--- a/lib/graph/graph_private.h
+++ b/lib/graph/graph_private.h
@@ -100,6 +100,8 @@  struct graph {
 	/**< Circular buffer mask for wrap around. */
 	rte_graph_t id;
 	/**< Graph identifier. */
+	unsigned int lcore_id;
+	/**< Lcore identifier where the graph prefer to run on. Used for mcore dispatch model. */
 	size_t mem_sz;
 	/**< Memory size of the graph. */
 	int socket;
diff --git a/lib/graph/rte_graph.h b/lib/graph/rte_graph.h
index c9a77297fc..f70c694e77 100644
--- a/lib/graph/rte_graph.h
+++ b/lib/graph/rte_graph.h
@@ -285,6 +285,28 @@  char *rte_graph_id_to_name(rte_graph_t id);
 __rte_experimental
 int rte_graph_export(const char *name, FILE *f);
 
+/**
+ * Bind graph with specific lcore for mcore dispatch model.
+ *
+ * @param id
+ *   Graph id to get the pointer of graph object
+ * @param lcore
+ * The lcore where the graph will run on
+ * @return
+ *   0 on success, error otherwise.
+ */
+__rte_experimental
+int rte_graph_model_mcore_dispatch_core_bind(rte_graph_t id, int lcore);
+
+/**
+ * Unbind graph with lcore for mcore dispatch model
+ *
+ * @param id
+ * Graph id to get the pointer of graph object
+ */
+__rte_experimental
+void rte_graph_model_mcore_dispatch_core_unbind(rte_graph_t id);
+
 /**
  * Get graph object from its name.
  *
diff --git a/lib/graph/version.map b/lib/graph/version.map
index aca38b23f0..5a6e13e62b 100644
--- a/lib/graph/version.map
+++ b/lib/graph/version.map
@@ -18,6 +18,8 @@  EXPERIMENTAL {
 	rte_graph_node_get_by_name;
 	rte_graph_obj_dump;
 	rte_graph_walk;
+	rte_graph_model_mcore_dispatch_core_bind;
+	rte_graph_model_mcore_dispatch_core_unbind;
 
 	rte_graph_cluster_stats_create;
 	rte_graph_cluster_stats_destroy;