net/softnic: support flow validate

Start adding flow api operations.

Started with flow validate api support by adding
below basic infrastructure.

flow_pipeline_table_get()
pmd_flow_validate()

Additional flow validate changes will be
added in next patches.

Signed-off-by: Cristian Dumitrescu <cristian.dumitrescu@intel.com>
Signed-off-by: Reshma Pattan <reshma.pattan@intel.com>

drivers/net/softnic/rte_eth_softnic.c

@@ -204,6 +204,21 @@ pmd_link_update(struct rte_eth_dev *dev __rte_unused,
 	return 0;
 }
 
+static int
+pmd_filter_ctrl(struct rte_eth_dev *dev __rte_unused,
+		enum rte_filter_type filter_type,
+		enum rte_filter_op filter_op,
+		void *arg)
+{
+	if (filter_type == RTE_ETH_FILTER_GENERIC &&
+			filter_op == RTE_ETH_FILTER_GET) {
+		*(const void **)arg = &pmd_flow_ops;
+		return 0;
+	}
+
+	return -ENOTSUP;
+}
+
 static int
 pmd_tm_ops_get(struct rte_eth_dev *dev __rte_unused, void *arg)
 {
@@ -221,6 +236,7 @@ static const struct eth_dev_ops pmd_ops = {
 	.dev_infos_get = pmd_dev_infos_get,
 	.rx_queue_setup = pmd_rx_queue_setup,
 	.tx_queue_setup = pmd_tx_queue_setup,
+	.filter_ctrl = pmd_filter_ctrl,
 	.tm_ops_get = pmd_tm_ops_get,
 };
 

drivers/net/softnic/rte_eth_softnic_flow.c

@@ -44,3 +44,115 @@ flow_attr_map_get(struct pmd_internals *softnic,
 	return (ingress) ? &softnic->flow.ingress_map[group_id] :
 		&softnic->flow.egress_map[group_id];
 }
+
+static int
+flow_pipeline_table_get(struct pmd_internals *softnic,
+		const struct rte_flow_attr *attr,
+		const char **pipeline_name,
+		uint32_t *table_id,
+		struct rte_flow_error *error)
+{
+	struct flow_attr_map *map;
+
+	if (attr == NULL)
+		return rte_flow_error_set(error,
+				EINVAL,
+				RTE_FLOW_ERROR_TYPE_ATTR,
+				NULL,
+				"Null attr");
+
+	if (!attr->ingress && !attr->egress)
+		return rte_flow_error_set(error,
+				EINVAL,
+				RTE_FLOW_ERROR_TYPE_ATTR_INGRESS,
+				attr,
+				"Ingress/egress not specified");
+
+	if (attr->ingress && attr->egress)
+		return rte_flow_error_set(error,
+				EINVAL,
+				RTE_FLOW_ERROR_TYPE_ATTR_INGRESS,
+				attr,
+				"Setting both ingress and egress is not allowed");
+
+	map = flow_attr_map_get(softnic,
+			attr->group,
+			attr->ingress);
+	if (map == NULL ||
+			map->valid == 0)
+		return rte_flow_error_set(error,
+				EINVAL,
+				RTE_FLOW_ERROR_TYPE_ATTR_GROUP,
+				attr,
+				"Invalid group ID");
+
+	if (pipeline_name)
+		*pipeline_name = map->pipeline_name;
+
+	if (table_id)
+		*table_id = map->table_id;
+
+	return 0;
+}
+
+static int
+pmd_flow_validate(struct rte_eth_dev *dev,
+		const struct rte_flow_attr *attr,
+		const struct rte_flow_item item[],
+		const struct rte_flow_action action[],
+		struct rte_flow_error *error)
+{
+	struct pmd_internals *softnic = dev->data->dev_private;
+	struct pipeline *pipeline;
+	const char *pipeline_name = NULL;
+	uint32_t table_id = 0;
+	int status;
+
+	/* Check input parameters. */
+	if (attr == NULL)
+		return rte_flow_error_set(error,
+				EINVAL,
+				RTE_FLOW_ERROR_TYPE_ATTR,
+				NULL, "Null attr");
+
+	if (item == NULL)
+		return rte_flow_error_set(error,
+				EINVAL,
+				RTE_FLOW_ERROR_TYPE_ITEM,
+				NULL,
+				"Null item");
+
+	if (action == NULL)
+		return rte_flow_error_set(error,
+				EINVAL,
+				RTE_FLOW_ERROR_TYPE_ACTION,
+				NULL,
+				"Null action");
+
+	/* Identify the pipeline table to add this flow to. */
+	status = flow_pipeline_table_get(softnic, attr, &pipeline_name,
+					&table_id, error);
+	if (status)
+		return status;
+
+	pipeline = softnic_pipeline_find(softnic, pipeline_name);
+	if (pipeline == NULL)
+		return rte_flow_error_set(error,
+				EINVAL,
+				RTE_FLOW_ERROR_TYPE_UNSPECIFIED,
+				NULL,
+				"Invalid pipeline name");
+
+	if (table_id >= pipeline->n_tables)
+		return rte_flow_error_set(error,
+				EINVAL,
+				RTE_FLOW_ERROR_TYPE_UNSPECIFIED,
+				NULL,
+				"Invalid pipeline table ID");
+
+	return 0;
+}
+
+const struct rte_flow_ops pmd_flow_ops = {
+	.validate = pmd_flow_validate,
+};

drivers/net/softnic/rte_eth_softnic_internals.h

@@ -569,6 +569,8 @@ flow_attr_map_get(struct pmd_internals *softnic,
 		uint32_t group_id,
 		int ingress);
 
+extern const struct rte_flow_ops pmd_flow_ops;
+
 /**
  * MEMPOOL
  */