[PATCH 2/4] net/ice: add vector tunnel context encoding

[Anurag Mandal]

Added helpers to encode tunnel context descriptors,
and checksum offsets.

Signed-off-by: Anurag Mandal <anurag.mandal at intel.com>
---
 drivers/net/intel/ice/ice_rxtx_vec_common.h | 53 ++++++++++++++++++++-
 1 file changed, 51 insertions(+), 2 deletions(-)

diff --git a/drivers/net/intel/ice/ice_rxtx_vec_common.h b/drivers/net/intel/ice/ice_rxtx_vec_common.h
index 1d83a087cc..b84456357f 100644
--- a/drivers/net/intel/ice/ice_rxtx_vec_common.h
+++ b/drivers/net/intel/ice/ice_rxtx_vec_common.h
@@ -123,8 +123,12 @@ ice_txd_enable_offload(struct rte_mbuf *tx_pkt,
 
 	/* Tx Checksum Offload */
 	/* SET MACLEN */
-	td_offset |= (tx_pkt->l2_len >> 1) <<
-		CI_TX_DESC_LEN_MACLEN_S;
+	if (ol_flags & RTE_MBUF_F_TX_TUNNEL_MASK)
+		td_offset |= (tx_pkt->outer_l2_len >> 1) <<
+			CI_TX_DESC_LEN_MACLEN_S;
+	else
+		td_offset |= (tx_pkt->l2_len >> 1) <<
+			CI_TX_DESC_LEN_MACLEN_S;
 
 	/* Enable L3 checksum offload */
 	if (ol_flags & RTE_MBUF_F_TX_IP_CKSUM) {
@@ -172,4 +176,49 @@ ice_txd_enable_offload(struct rte_mbuf *tx_pkt,
 
 	*txd_hi |= ((uint64_t)td_cmd) << CI_TXD_QW1_CMD_S;
 }
+
+static inline uint64_t
+ice_txd_tunneling_ctx(const struct rte_mbuf *tx_pkt)
+{
+	const uint64_t ol_flags = tx_pkt->ol_flags;
+	uint64_t ctx = 0;
+
+	if (!(ol_flags & RTE_MBUF_F_TX_TUNNEL_MASK))
+		return 0;
+
+	if (ol_flags & RTE_MBUF_F_TX_OUTER_IP_CKSUM)
+		ctx |= ICE_TX_CTX_EIPT_IPV4;
+	else if (ol_flags & RTE_MBUF_F_TX_OUTER_IPV4)
+		ctx |= ICE_TX_CTX_EIPT_IPV4_NO_CSUM;
+	else if (ol_flags & RTE_MBUF_F_TX_OUTER_IPV6)
+		ctx |= ICE_TX_CTX_EIPT_IPV6;
+
+	ctx |= (uint64_t)(tx_pkt->outer_l3_len >> 2) << ICE_TXD_CTX_QW0_EIPLEN_S;
+
+	switch (ol_flags & RTE_MBUF_F_TX_TUNNEL_MASK) {
+	case RTE_MBUF_F_TX_TUNNEL_IPIP:
+		break;
+	case RTE_MBUF_F_TX_TUNNEL_VXLAN:
+	case RTE_MBUF_F_TX_TUNNEL_VXLAN_GPE:
+	case RTE_MBUF_F_TX_TUNNEL_GTP:
+	case RTE_MBUF_F_TX_TUNNEL_GENEVE:
+		ctx |= ICE_TXD_CTX_UDP_TUNNELING;
+		break;
+	case RTE_MBUF_F_TX_TUNNEL_GRE:
+		ctx |= ICE_TXD_CTX_GRE_TUNNELING;
+		break;
+	default:
+		PMD_TX_LOG(ERR, "Tunnel type not supported");
+		return ctx;
+	}
+
+	ctx |= (uint64_t)(tx_pkt->l2_len >> 1) << ICE_TXD_CTX_QW0_NATLEN_S;
+
+	if ((ctx & ICE_TXD_CTX_QW0_EIPT_M) &&
+			(ctx & ICE_TXD_CTX_UDP_TUNNELING) &&
+			(ol_flags & RTE_MBUF_F_TX_OUTER_UDP_CKSUM))
+		ctx |= ICE_TXD_CTX_QW0_L4T_CS_M;
+
+	return ctx;
+}
 #endif
-- 
2.34.1