[dpdk-dev] [PATCH] net/mlx5: match on TCP flags via DV/DR engine

[Jack Min]

Add support to match all TCP control bits (flags)
except "NS (ECN-nonce)" via Direct Verbs (DV) or Direct Rule (DR)
engine.

Signed-off-by: Xiaoyu Min <jack...@mellanox.com>
---
 drivers/net/mlx5/mlx5_flow_dv.c | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/drivers/net/mlx5/mlx5_flow_dv.c b/drivers/net/mlx5/mlx5_flow_dv.c
index cf255ca95c..44b4f40404 100644
--- a/drivers/net/mlx5/mlx5_flow_dv.c
+++ b/drivers/net/mlx5/mlx5_flow_dv.c
@@ -2066,6 +2066,12 @@ flow_dv_validate(struct rte_eth_dev *dev, const struct 
rte_flow_attr *attr,
        uint64_t last_item = 0;
        uint8_t next_protocol = 0xff;
        int actions_n = 0;
+       struct rte_flow_item_tcp nic_tcp_mask = {
+               .hdr = { .tcp_flags = 0xFF,
+                        .src_port = RTE_BE16(UINT16_MAX),
+                        .dst_port = RTE_BE16(UINT16_MAX),
+               }
+       };
 
        if (items == NULL)
                return -1;
@@ -2146,7 +2152,7 @@ flow_dv_validate(struct rte_eth_dev *dev, const struct 
rte_flow_attr *attr,
                        ret = mlx5_flow_validate_item_tcp
                                                (items, item_flags,
                                                 next_protocol,
-                                                &rte_flow_item_tcp_mask,
+                                                &nic_tcp_mask,
                                                 error);
                        if (ret < 0)
                                return ret;
@@ -2862,6 +2868,10 @@ flow_dv_translate_item_tcp(void *matcher, void *key,
                 rte_be_to_cpu_16(tcp_m->hdr.dst_port));
        MLX5_SET(fte_match_set_lyr_2_4, headers_v, tcp_dport,
                 rte_be_to_cpu_16(tcp_v->hdr.dst_port & tcp_m->hdr.dst_port));
+       MLX5_SET(fte_match_set_lyr_2_4, headers_m, tcp_flags,
+                tcp_m->hdr.tcp_flags);
+       MLX5_SET(fte_match_set_lyr_2_4, headers_v, tcp_flags,
+                (tcp_v->hdr.tcp_flags & tcp_m->hdr.tcp_flags));
 }
 
 /**
-- 
2.20.1