+ * @param offsets
+ * Pointer to the SWP header offsets.
+ * @param swp_types
+ * Pointer to the SWP header types.
+ */
+static __rte_always_inline void
+txq_mbuf_to_swp(struct mlx5_txq_data *txq, struct rte_mbuf *buf,
+ uint8_t *offsets, uint8_t *swp_types)
+{
+ const uint64_t vlan = buf->ol_flags & PKT_TX_VLAN_PKT;
+ const uint64_t tunnel = buf->ol_flags & PKT_TX_TUNNEL_MASK;
+ const uint64_t tso = buf->ol_flags & PKT_TX_TCP_SEG;
+ const uint64_t csum_flags = buf->ol_flags & PKT_TX_L4_MASK;
+ const uint64_t inner_ip =
+ buf->ol_flags & (PKT_TX_IPV4 | PKT_TX_IPV6);
+ const uint64_t ol_flags_mask = PKT_TX_L4_MASK | PKT_TX_IPV6 |
+ PKT_TX_OUTER_IPV6;
+ uint16_t idx;
+ uint16_t off;
+
+ if (likely(!txq->swp_en || (tunnel != PKT_TX_TUNNEL_UDP &&
+ tunnel != PKT_TX_TUNNEL_IP)))
+ return;
+ /*
+ * The index should have:
+ * bit[0:1] = PKT_TX_L4_MASK
+ * bit[4] = PKT_TX_IPV6
+ * bit[8] = PKT_TX_OUTER_IPV6
+ * bit[9] = PKT_TX_OUTER_UDP
+ */
+ idx = (buf->ol_flags & ol_flags_mask) >> 52;
+ if (tunnel == PKT_TX_TUNNEL_UDP)
+ idx |= 1 << 9;
+ *swp_types = mlx5_swp_types_table[idx];
+ /*
+ * Set offsets for SW parser. Since ConnectX-5, SW parser just
+ * complements HW parser. SW parser starts to engage only if HW parser
+ * can't reach a header. For the older devices, HW parser will not kick
+ * in if any of SWP offsets is set. Therefore, all of the L3 offsets
+ * should be set regardless of HW offload.
+ */
+ off = buf->outer_l2_len + (vlan ? sizeof(struct rte_vlan_hdr) : 0);
+ offsets[1] = off >> 1; /* Outer L3 offset. */
+ off += buf->outer_l3_len;
+ if (tunnel == PKT_TX_TUNNEL_UDP)
+ offsets[0] = off >> 1; /* Outer L4 offset. */
+ if (inner_ip) {
+ off += buf->l2_len;
+ offsets[3] = off >> 1; /* Inner L3 offset. */
+ if (csum_flags == PKT_TX_TCP_CKSUM || tso ||
+ csum_flags == PKT_TX_UDP_CKSUM) {
+ off += buf->l3_len;
+ offsets[2] = off >> 1; /* Inner L4 offset. */
+ }
+ }
+}
+
+/**
+ * Convert the Checksum offloads to Verbs.
+ *
+ * @param buf
+ * Pointer to the mbuf.