net/mlx4: add flow support for multicast traffic

[dpdk.git] / drivers / net / mlx4 / mlx4_flow.c

diff --git a/drivers/net/mlx4/mlx4_flow.c b/drivers/net/mlx4/mlx4_flow.c
index 377b48b..15526af 100644 (file)
--- a/drivers/net/mlx4/mlx4_flow.c
+++ b/drivers/net/mlx4/mlx4_flow.c
@@ -107,7 +107,9 @@ struct mlx4_drop {
  *
  * Additional mlx4-specific constraints on supported fields:
  *
- * - No support for partial masks.
+ * - No support for partial masks, except in the specific case of matching
+ *   all multicast traffic (@p spec->dst and @p mask->dst equal to
+ *   01:00:00:00:00:00).
  * - Not providing @p item->spec or providing an empty @p mask->dst is
  *   *only* supported if the rule doesn't specify additional matching
  *   criteria (i.e. rule is promiscuous-like).
@@ -152,6 +154,13 @@ mlx4_flow_merge_eth(struct rte_flow *flow,
                        goto error;
                } else if (!sum_dst) {
                        flow->promisc = 1;
+               } else if (sum_dst == 1 && mask->dst.addr_bytes[0] == 1) {
+                       if (!(spec->dst.addr_bytes[0] & 1)) {
+                               msg = "mlx4 does not support the explicit"
+                                       " exclusion of all multicast traffic";
+                               goto error;
+                       }
+                       flow->allmulti = 1;
                } else if (sum_dst != (UINT8_C(0xff) * ETHER_ADDR_LEN)) {
                        msg = "mlx4 does not support matching partial"
                                " Ethernet fields";
@@ -164,6 +173,10 @@ mlx4_flow_merge_eth(struct rte_flow *flow,
                flow->ibv_attr->type = IBV_FLOW_ATTR_ALL_DEFAULT;
                return 0;
        }
+       if (flow->allmulti) {
+               flow->ibv_attr->type = IBV_FLOW_ATTR_MC_DEFAULT;
+               return 0;
+       }
        ++flow->ibv_attr->num_of_specs;
        eth = (void *)((uintptr_t)flow->ibv_attr + flow->ibv_attr_size);
        *eth = (struct ibv_flow_spec_eth) {
@@ -615,7 +628,7 @@ fill:
                        flow->internal = 1;
                        continue;
                }
-               if (flow->promisc) {
+               if (flow->promisc || flow->allmulti) {
                        msg = "mlx4 does not support additional matching"
                                " criteria combined with indiscriminate"
                                " matching on Ethernet headers";