[DPDK 18.08 v1 10/12] net/mlx5: add flow TCP item

[Nelio Laranjeiro <nelio.laranjeiro@6wind.com>]

Signed-off-by: Nelio Laranjeiro <nelio.laranjeiro@6wind.com>
---
 drivers/net/mlx5/mlx5_flow.c | 55 ++++++++++++++++++++++++++++++++++++
 1 file changed, 55 insertions(+)

diff --git a/drivers/net/mlx5/mlx5_flow.c b/drivers/net/mlx5/mlx5_flow.c
index 66ebe6d36..ce1b4e94b 100644
--- a/drivers/net/mlx5/mlx5_flow.c
+++ b/drivers/net/mlx5/mlx5_flow.c
@@ -706,6 +706,58 @@ mlx5_flow_item_udp(const struct rte_flow_item *item, struct rte_flow *flow,
 	return 0;
 }
 
+/**
+ * Validate TCP layer and possibly create the Verbs specification.
+ *
+ * @param item[in]
+ *   Item specification.
+ * @param flow[in, out]
+ *   Pointer to flow structure.
+ * @param error
+ *   Pointer to error structure.
+ *
+ * @return
+ *   0 on success, a negative errno value otherwise and rte_errno is set.
+ */
+static int
+mlx5_flow_item_tcp(const struct rte_flow_item *item, struct rte_flow *flow,
+		   struct rte_flow_error *error)
+{
+	const struct rte_flow_item_tcp *spec = item->spec;
+	const struct rte_flow_item_tcp *mask = item->mask;
+	unsigned int size = sizeof(struct ibv_flow_spec_tcp_udp);
+	struct ibv_flow_spec_tcp_udp tcp = {
+		.type = IBV_FLOW_SPEC_TCP,
+		.size = size,
+	};
+	int ret;
+
+	if (flow->verbs.layers & MLX5_FLOW_LAYER_L4)
+		return rte_flow_error_set(error, ENOTSUP,
+					  RTE_FLOW_ERROR_TYPE_ITEM,
+					  item,
+					  "L4 layer is already present");
+	if (!mask)
+		mask = &rte_flow_item_tcp_mask;
+	ret = mlx5_flow_item_validate(item, (const uint8_t *)mask,
+				      (const uint8_t *)&rte_flow_item_tcp_mask,
+				      sizeof(struct rte_flow_item_tcp), error);
+	if (ret < 0)
+		return ret;
+	if (spec) {
+		tcp.val.dst_port = spec->hdr.dst_port;
+		tcp.val.src_port = spec->hdr.src_port;
+		tcp.mask.dst_port = mask->hdr.dst_port;
+		tcp.mask.src_port = mask->hdr.src_port;
+		/* Remove unwanted bits from values. */
+		tcp.val.src_port &= tcp.mask.src_port;
+		tcp.val.dst_port &= tcp.mask.dst_port;
+	}
+	mlx5_flow_spec_verbs_add(flow, &tcp, size);
+	flow->verbs.layers |= MLX5_FLOW_LAYER_L4_TCP;
+	return 0;
+}
+
 /**
  * Validate items provided by the user.
  *
@@ -745,6 +797,9 @@ mlx5_flow_items(const struct rte_flow_item items[],
 		case RTE_FLOW_ITEM_TYPE_UDP:
 			ret = mlx5_flow_item_udp(items, flow, error);
 			break;
+		case RTE_FLOW_ITEM_TYPE_TCP:
+			ret = mlx5_flow_item_tcp(items, flow, error);
+			break;
 		default:
 			return rte_flow_error_set(error, ENOTSUP,
 						  RTE_FLOW_ERROR_TYPE_ITEM,
-- 
2.17.0