diff --git a/drivers/net/mlx5/mlx5.c b/drivers/net/mlx5/mlx5.c
index 0548d17ad..a5eb3fdc5 100644
--- a/drivers/net/mlx5/mlx5.c
+++ b/drivers/net/mlx5/mlx5.c
@@ -802,7 +802,7 @@ mlx5_pci_probe(struct rte_pci_driver *pci_drv, struct rte_pci_device *pci_dev)
 		priv->hw_csum_l2tun = !!(exp_device_attr.exp_device_cap_flags &
 					 IBV_DEVICE_VXLAN_SUPPORT);
 #endif
-		DEBUG("L2 tunnel checksum offloads are %ssupported",
+		DEBUG("Rx L2 tunnel checksum offloads are %ssupported",
 		      (priv->hw_csum_l2tun ? "" : "not "));
 
 #ifdef HAVE_IBV_DEVICE_COUNTERS_SET_SUPPORT
diff --git a/drivers/net/mlx5/mlx5_rxtx.c b/drivers/net/mlx5/mlx5_rxtx.c
index 2d30c507f..32bfa307c 100644
--- a/drivers/net/mlx5/mlx5_rxtx.c
+++ b/drivers/net/mlx5/mlx5_rxtx.c
@@ -374,7 +374,7 @@ mlx5_tx_burst(void *dpdk_txq, struct rte_mbuf **pkts, uint16_t pkts_n)
 		uint16_t pkt_inline_sz = MLX5_WQE_DWORD_SIZE + 2;
 		uint16_t tso_header_sz = 0;
 		uint16_t ehdr;
-		uint8_t cs_flags = 0;
+		uint8_t cs_flags;
 		uint64_t tso = 0;
 		uint16_t tso_segsz = 0;
 #ifdef MLX5_PMD_SOFT_COUNTERS
@@ -417,23 +417,7 @@ mlx5_tx_burst(void *dpdk_txq, struct rte_mbuf **pkts, uint16_t pkts_n)
 		if (pkts_n - i > 1)
 			rte_prefetch0(
 			    rte_pktmbuf_mtod(*(pkts + 1), volatile void *));
-		/* Should we enable HW CKSUM offload */
-		if (buf->ol_flags &
-		    (PKT_TX_IP_CKSUM | PKT_TX_TCP_CKSUM | PKT_TX_UDP_CKSUM)) {
-			const uint64_t is_tunneled = buf->ol_flags &
-						     (PKT_TX_TUNNEL_GRE |
-						      PKT_TX_TUNNEL_VXLAN);
-
-			if (is_tunneled && txq->tunnel_en) {
-				cs_flags = MLX5_ETH_WQE_L3_INNER_CSUM |
-					   MLX5_ETH_WQE_L4_INNER_CSUM;
-				if (buf->ol_flags & PKT_TX_OUTER_IP_CKSUM)
-					cs_flags |= MLX5_ETH_WQE_L3_CSUM;
-			} else {
-				cs_flags = MLX5_ETH_WQE_L3_CSUM |
-					   MLX5_ETH_WQE_L4_CSUM;
-			}
-		}
+		cs_flags = txq_ol_cksum_to_cs(txq, buf);
 		raw = ((uint8_t *)(uintptr_t)wqe) + 2 * MLX5_WQE_DWORD_SIZE;
 		/* Replace the Ethernet type by the VLAN if necessary. */
 		if (buf->ol_flags & PKT_TX_VLAN_PKT) {
@@ -847,7 +831,7 @@ mlx5_tx_burst_mpw(void *dpdk_txq, struct rte_mbuf **pkts, uint16_t pkts_n)
 		struct rte_mbuf *buf = *(pkts++);
 		uint32_t length;
 		unsigned int segs_n = buf->nb_segs;
-		uint32_t cs_flags = 0;
+		uint32_t cs_flags;
 
 		/*
 		 * Make sure there is enough room to store this packet and
@@ -863,10 +847,7 @@ mlx5_tx_burst_mpw(void *dpdk_txq, struct rte_mbuf **pkts, uint16_t pkts_n)
 		}
 		max_elts -= segs_n;
 		--pkts_n;
-		/* Should we enable HW CKSUM offload */
-		if (buf->ol_flags &
-		    (PKT_TX_IP_CKSUM | PKT_TX_TCP_CKSUM | PKT_TX_UDP_CKSUM))
-			cs_flags = MLX5_ETH_WQE_L3_CSUM | MLX5_ETH_WQE_L4_CSUM;
+		cs_flags = txq_ol_cksum_to_cs(txq, buf);
 		/* Retrieve packet information. */
 		length = PKT_LEN(buf);
 		assert(length);
@@ -1072,7 +1053,7 @@ mlx5_tx_burst_mpw_inline(void *dpdk_txq, struct rte_mbuf **pkts,
 		uintptr_t addr;
 		uint32_t length;
 		unsigned int segs_n = buf->nb_segs;
-		uint32_t cs_flags = 0;
+		uint8_t cs_flags;
 
 		/*
 		 * Make sure there is enough room to store this packet and
@@ -1093,10 +1074,7 @@ mlx5_tx_burst_mpw_inline(void *dpdk_txq, struct rte_mbuf **pkts,
 		 * iteration.
 		 */
 		max_wqe = (1u << txq->wqe_n) - (txq->wqe_ci - txq->wqe_pi);
-		/* Should we enable HW CKSUM offload */
-		if (buf->ol_flags &
-		    (PKT_TX_IP_CKSUM | PKT_TX_TCP_CKSUM | PKT_TX_UDP_CKSUM))
-			cs_flags = MLX5_ETH_WQE_L3_CSUM | MLX5_ETH_WQE_L4_CSUM;
+		cs_flags = txq_ol_cksum_to_cs(txq, buf);
 		/* Retrieve packet information. */
 		length = PKT_LEN(buf);
 		/* Start new session if packet differs. */
@@ -1366,7 +1344,7 @@ mlx5_tx_burst_empw(void *dpdk_txq, struct rte_mbuf **pkts, uint16_t pkts_n)
 		unsigned int do_inline = 0; /* Whether inline is possible. */
 		uint32_t length;
 		unsigned int segs_n = buf->nb_segs;
-		uint32_t cs_flags = 0;
+		uint8_t cs_flags;
 
 		/*
 		 * Make sure there is enough room to store this packet and
@@ -1380,10 +1358,7 @@ mlx5_tx_burst_empw(void *dpdk_txq, struct rte_mbuf **pkts, uint16_t pkts_n)
 			txq->stats.oerrors++;
 			break;
 		}
-		/* Should we enable HW CKSUM offload. */
-		if (buf->ol_flags &
-		    (PKT_TX_IP_CKSUM | PKT_TX_TCP_CKSUM | PKT_TX_UDP_CKSUM))
-			cs_flags = MLX5_ETH_WQE_L3_CSUM | MLX5_ETH_WQE_L4_CSUM;
+		cs_flags = txq_ol_cksum_to_cs(txq, buf);
 		/* Retrieve packet information. */
 		length = PKT_LEN(buf);
 		/* Start new session if:
diff --git a/drivers/net/mlx5/mlx5_rxtx.h b/drivers/net/mlx5/mlx5_rxtx.h
index d34f3cc04..63eb12c66 100644
--- a/drivers/net/mlx5/mlx5_rxtx.h
+++ b/drivers/net/mlx5/mlx5_rxtx.h
@@ -617,4 +617,38 @@ mlx5_tx_dbrec(struct mlx5_txq_data *txq, volatile struct mlx5_wqe *wqe)
 	mlx5_tx_dbrec_cond_wmb(txq, wqe, 1);
 }
 
+/**
+ * Convert the Checksum offloads to Verbs.
+ *
+ * @param txq_data
+ *   Pointer to the Tx queue.
+ * @param buf
+ *   Pointer to the mbuf.
+ *
+ * @return
+ *   the converted cs_flags.
+ */
+static __rte_always_inline uint8_t
+txq_ol_cksum_to_cs(struct mlx5_txq_data *txq_data, struct rte_mbuf *buf)
+{
+	uint8_t cs_flags = 0;
+
+	/* Should we enable HW CKSUM offload */
+	if (buf->ol_flags &
+	    (PKT_TX_IP_CKSUM | PKT_TX_TCP_CKSUM | PKT_TX_UDP_CKSUM)) {
+		if (txq_data->tunnel_en &&
+		    (buf->ol_flags &
+		     (PKT_TX_TUNNEL_GRE | PKT_TX_TUNNEL_VXLAN))) {
+			cs_flags = MLX5_ETH_WQE_L3_INNER_CSUM |
+				   MLX5_ETH_WQE_L4_INNER_CSUM;
+			if (buf->ol_flags & PKT_TX_OUTER_IP_CKSUM)
+				cs_flags |= MLX5_ETH_WQE_L3_CSUM;
+		} else {
+			cs_flags = MLX5_ETH_WQE_L3_CSUM |
+				   MLX5_ETH_WQE_L4_CSUM;
+		}
+	}
+	return cs_flags;
+}
+
 #endif /* RTE_PMD_MLX5_RXTX_H_ */
diff --git a/drivers/net/mlx5/mlx5_rxtx_vec.c b/drivers/net/mlx5/mlx5_rxtx_vec.c
index ba6c8cefd..3aca17cb4 100644
--- a/drivers/net/mlx5/mlx5_rxtx_vec.c
+++ b/drivers/net/mlx5/mlx5_rxtx_vec.c
@@ -123,24 +123,7 @@ txq_calc_offload(struct mlx5_txq_data *txq, struct rte_mbuf **pkts,
 	for (pos = 1; pos < pkts_n; ++pos)
 		if ((pkts[pos]->ol_flags ^ pkts[0]->ol_flags) & ol_mask)
 			break;
-	/* Should open another MPW session for the rest. */
-	if (pkts[0]->ol_flags &
-	    (PKT_TX_IP_CKSUM | PKT_TX_TCP_CKSUM | PKT_TX_UDP_CKSUM)) {
-		const uint64_t is_tunneled =
-			pkts[0]->ol_flags &
-			(PKT_TX_TUNNEL_GRE |
-			 PKT_TX_TUNNEL_VXLAN);
-
-		if (is_tunneled && txq->tunnel_en) {
-			*cs_flags = MLX5_ETH_WQE_L3_INNER_CSUM |
-				    MLX5_ETH_WQE_L4_INNER_CSUM;
-			if (pkts[0]->ol_flags & PKT_TX_OUTER_IP_CKSUM)
-				*cs_flags |= MLX5_ETH_WQE_L3_CSUM;
-		} else {
-			*cs_flags = MLX5_ETH_WQE_L3_CSUM |
-				    MLX5_ETH_WQE_L4_CSUM;
-		}
-	}
+	*cs_flags = txq_ol_cksum_to_cs(txq, pkts[0]);
 	return pos;
 }
 
diff --git a/drivers/net/mlx5/mlx5_rxtx_vec_neon.h b/drivers/net/mlx5/mlx5_rxtx_vec_neon.h
index c721d80eb..77ce0c3e0 100644
--- a/drivers/net/mlx5/mlx5_rxtx_vec_neon.h
+++ b/drivers/net/mlx5/mlx5_rxtx_vec_neon.h
@@ -149,7 +149,7 @@ txq_scatter_v(struct mlx5_txq_data *txq, struct rte_mbuf **pkts,
 			11, 10,  9,  8, /* bswap32 */
 			12, 13, 14, 15
 		};
-		uint8_t cs_flags = 0;
+		uint8_t cs_flags;
 		uint16_t max_elts;
 		uint16_t max_wqe;
 		uint8x16_t *t_wqe;
@@ -168,22 +168,7 @@ txq_scatter_v(struct mlx5_txq_data *txq, struct rte_mbuf **pkts,
 			break;
 		wqe = &((volatile struct mlx5_wqe64 *)
 			 txq->wqes)[wqe_ci & wq_mask].hdr;
-		if (buf->ol_flags &
-		     (PKT_TX_IP_CKSUM | PKT_TX_TCP_CKSUM | PKT_TX_UDP_CKSUM)) {
-			const uint64_t is_tunneled =
-				buf->ol_flags & (PKT_TX_TUNNEL_GRE |
-						 PKT_TX_TUNNEL_VXLAN);
-
-			if (is_tunneled && txq->tunnel_en) {
-				cs_flags = MLX5_ETH_WQE_L3_INNER_CSUM |
-					   MLX5_ETH_WQE_L4_INNER_CSUM;
-				if (buf->ol_flags & PKT_TX_OUTER_IP_CKSUM)
-					cs_flags |= MLX5_ETH_WQE_L3_CSUM;
-			} else {
-				cs_flags = MLX5_ETH_WQE_L3_CSUM |
-					   MLX5_ETH_WQE_L4_CSUM;
-			}
-		}
+		cs_flags = txq_ol_cksum_to_cs(txq, buf);
 		/* Title WQEBB pointer. */
 		t_wqe = (uint8x16_t *)wqe;
 		dseg = (uint8_t *)(wqe + 1);
diff --git a/drivers/net/mlx5/mlx5_rxtx_vec_sse.h b/drivers/net/mlx5/mlx5_rxtx_vec_sse.h
index 2b9f16010..f25681184 100644
--- a/drivers/net/mlx5/mlx5_rxtx_vec_sse.h
+++ b/drivers/net/mlx5/mlx5_rxtx_vec_sse.h
@@ -148,7 +148,7 @@ txq_scatter_v(struct mlx5_txq_data *txq, struct rte_mbuf **pkts,
 				      8,  9, 10, 11, /* bswap32 */
 				      4,  5,  6,  7, /* bswap32 */
 				      0,  1,  2,  3  /* bswap32 */);
-		uint8_t cs_flags = 0;
+		uint8_t cs_flags;
 		uint16_t max_elts;
 		uint16_t max_wqe;
 		__m128i *t_wqe, *dseg;
@@ -170,22 +170,7 @@ txq_scatter_v(struct mlx5_txq_data *txq, struct rte_mbuf **pkts,
 		}
 		wqe = &((volatile struct mlx5_wqe64 *)
 			 txq->wqes)[wqe_ci & wq_mask].hdr;
-		if (buf->ol_flags &
-		     (PKT_TX_IP_CKSUM | PKT_TX_TCP_CKSUM | PKT_TX_UDP_CKSUM)) {
-			const uint64_t is_tunneled =
-				buf->ol_flags & (PKT_TX_TUNNEL_GRE |
-						 PKT_TX_TUNNEL_VXLAN);
-
-			if (is_tunneled && txq->tunnel_en) {
-				cs_flags = MLX5_ETH_WQE_L3_INNER_CSUM |
-					   MLX5_ETH_WQE_L4_INNER_CSUM;
-				if (buf->ol_flags & PKT_TX_OUTER_IP_CKSUM)
-					cs_flags |= MLX5_ETH_WQE_L3_CSUM;
-			} else {
-				cs_flags = MLX5_ETH_WQE_L3_CSUM |
-					   MLX5_ETH_WQE_L4_CSUM;
-			}
-		}
+		cs_flags = txq_ol_cksum_to_cs(txq, buf);
 		/* Title WQEBB pointer. */
 		t_wqe = (__m128i *)wqe;
 		dseg = (__m128i *)(wqe + 1);
