[dpdk-dev] [DPDK 18.08 v1 09/12] net/mlx5: add flow UDP item

[Nelio Laranjeiro]

Signed-off-by: Nelio Laranjeiro <nelio.laranje...@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 6f3e50452..66ebe6d36 100644
--- a/drivers/net/mlx5/mlx5_flow.c
+++ b/drivers/net/mlx5/mlx5_flow.c
@@ -654,6 +654,58 @@ mlx5_flow_item_ipv6(const struct rte_flow_item *item, 
struct rte_flow *flow,
        return 0;
 }
 
+/**
+ * Validate UDP 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_udp(const struct rte_flow_item *item, struct rte_flow *flow,
+                  struct rte_flow_error *error)
+{
+       const struct rte_flow_item_udp *spec = item->spec;
+       const struct rte_flow_item_udp *mask = item->mask;
+       unsigned int size = sizeof(struct ibv_flow_spec_tcp_udp);
+       struct ibv_flow_spec_tcp_udp udp = {
+               .type = IBV_FLOW_SPEC_UDP,
+               .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_udp_mask;
+       ret = mlx5_flow_item_validate(item, (const uint8_t *)mask,
+                                     (const uint8_t *)&rte_flow_item_udp_mask,
+                                     sizeof(struct rte_flow_item_udp), error);
+       if (ret < 0)
+               return ret;
+       if (spec) {
+               udp.val.dst_port = spec->hdr.dst_port;
+               udp.val.src_port = spec->hdr.src_port;
+               udp.mask.dst_port = mask->hdr.dst_port;
+               udp.mask.src_port = mask->hdr.src_port;
+               /* Remove unwanted bits from values. */
+               udp.val.src_port &= udp.mask.src_port;
+               udp.val.dst_port &= udp.mask.dst_port;
+       }
+       mlx5_flow_spec_verbs_add(flow, &udp, size);
+       flow->verbs.layers |= MLX5_FLOW_LAYER_L4_UDP;
+       return 0;
+}
+
 /**
  * Validate items provided by the user.
  *
@@ -690,6 +742,9 @@ mlx5_flow_items(const struct rte_flow_item items[],
                case RTE_FLOW_ITEM_TYPE_IPV6:
                        ret = mlx5_flow_item_ipv6(items, flow, error);
                        break;
+               case RTE_FLOW_ITEM_TYPE_UDP:
+                       ret = mlx5_flow_item_udp(items, flow, error);
+                       break;
                default:
                        return rte_flow_error_set(error, ENOTSUP,
                                                  RTE_FLOW_ERROR_TYPE_ITEM,
-- 
2.17.0