net/mlx4: disable UDP support in RSS flow rules

When part of the RSS hash calculation, UDP packets are discarded (not
received on any queue) likely due to an issue with the kernel
implementation.

Temporarily disable UDP RSS support until this issue is resolved.

Signed-off-by: Adrien Mazarguil <adrien.mazarguil@6wind.com>
Acked-by: Nelio Laranjeiro <nelio.laranjeiro@6wind.com>

diff --git a/drivers/net/mlx4/mlx4_flow.c b/drivers/net/mlx4/mlx4_flow.c
index 2b60d76..4c498f0 100644 (file)
--- a/drivers/net/mlx4/mlx4_flow.c
+++ b/drivers/net/mlx4/mlx4_flow.c
@@ -133,9 +133,11 @@ mlx4_conv_rss_hf(uint64_t rss_hf)
                [TCP] = (ETH_RSS_NONFRAG_IPV4_TCP |
                         ETH_RSS_NONFRAG_IPV6_TCP |
                         ETH_RSS_IPV6_TCP_EX),
-               [UDP] = (ETH_RSS_NONFRAG_IPV4_UDP |
-                        ETH_RSS_NONFRAG_IPV6_UDP |
-                        ETH_RSS_IPV6_UDP_EX),
+               /*
+                * UDP support is temporarily disabled due to an
+                * implementation issue in the kernel.
+                */
+               [UDP] = 0,
        };
        const uint64_t out[RTE_DIM(in)] = {
                [IPV4] = IBV_RX_HASH_SRC_IPV4 | IBV_RX_HASH_DST_IPV4,
@@ -753,10 +755,8 @@ fill:
                                        .rss_key = mlx4_rss_hash_key_default,
                                        .rss_key_len = MLX4_RSS_HASH_KEY_SIZE,
                                        .rss_hf = (ETH_RSS_IPV4 |
-                                                  ETH_RSS_NONFRAG_IPV4_UDP |
                                                   ETH_RSS_NONFRAG_IPV4_TCP |
                                                   ETH_RSS_IPV6 |
-                                                  ETH_RSS_NONFRAG_IPV6_UDP |
                                                   ETH_RSS_NONFRAG_IPV6_TCP),
                                };
                        /* Sanity checks. */