[dpdk-dev] [PATCH] net/mlx5: fix mark id retrieval

[Nelio Laranjeiro]

Mark ID in the completion queue entry is 24 bits, the remaining 8 bits are
reserved and may be nonzero. Do not take them into account when looking for
marked packets.

CC: stable at dpdk.org
Fixes: ea3bc3b1df94 ("net/mlx5: support mark flow action")
Signed-off-by: Nelio Laranjeiro <nelio.laranjeiro at 6wind.com>
Acked-by: Adrien Mazarguil <adrien.mazarguil at 6wind.com>
---
 drivers/net/mlx5/mlx5_prm.h  | 7 +++++++
 drivers/net/mlx5/mlx5_rxtx.c | 4 ++--
 2 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/drivers/net/mlx5/mlx5_prm.h b/drivers/net/mlx5/mlx5_prm.h
index 155bdba..608072f 100644
--- a/drivers/net/mlx5/mlx5_prm.h
+++ b/drivers/net/mlx5/mlx5_prm.h
@@ -138,6 +138,13 @@
 /* Inner L4 checksum offload (Tunneled packets only). */
 #define MLX5_ETH_WQE_L4_INNER_CSUM (1u << 5)
 
+/* Is flow mark valid. */
+#if RTE_BYTE_ORDER == RTE_LITTLE_ENDIAN
+#define MLX5_FLOW_MARK_IS_VALID(val) ((val) & 0xffffff00)
+#else
+#define MLX5_FLOW_MARK_IS_VALID(val) ((val) & 0xffffff)
+#endif
+
 /* INVALID is used by packets matching no flow rules. */
 #define MLX5_FLOW_MARK_INVALID 0
 
diff --git a/drivers/net/mlx5/mlx5_rxtx.c b/drivers/net/mlx5/mlx5_rxtx.c
index a1dd84a..1c5311c 100644
--- a/drivers/net/mlx5/mlx5_rxtx.c
+++ b/drivers/net/mlx5/mlx5_rxtx.c
@@ -1953,8 +1953,8 @@ mlx5_rx_burst(void *dpdk_rxq, struct rte_mbuf **pkts, uint16_t pkts_n)
 				pkt->hash.rss = rss_hash_res;
 				pkt->ol_flags = PKT_RX_RSS_HASH;
 			}
-			if (rxq->mark && (cqe->sop_drop_qpn !=
-					  htonl(MLX5_FLOW_MARK_INVALID))) {
+			if (rxq->mark &&
+			    MLX5_FLOW_MARK_IS_VALID(cqe->sop_drop_qpn)) {
 				pkt->ol_flags |= PKT_RX_FDIR;
 				if (cqe->sop_drop_qpn !=
 				    htonl(MLX5_FLOW_MARK_DEFAULT)) {
-- 
2.1.4