diff --git a/config/common_base b/config/common_base
index 4bff83a..d609a88 100644
--- a/config/common_base
+++ b/config/common_base
@@ -120,6 +120,7 @@ CONFIG_RTE_MAX_QUEUES_PER_PORT=1024
 CONFIG_RTE_LIBRTE_IEEE1588=n
 CONFIG_RTE_ETHDEV_QUEUE_STAT_CNTRS=16
 CONFIG_RTE_ETHDEV_RXTX_CALLBACKS=y
+CONFIG_RTE_ETHDEV_TX_PREPARE=y
 
 #
 # Support NIC bypass logic
diff --git a/lib/librte_ether/rte_ethdev.h b/lib/librte_ether/rte_ethdev.h
index 9678179..4ffc1b3 100644
--- a/lib/librte_ether/rte_ethdev.h
+++ b/lib/librte_ether/rte_ethdev.h
@@ -182,6 +182,7 @@
 #include <rte_pci.h>
 #include <rte_dev.h>
 #include <rte_devargs.h>
+#include <rte_errno.h>
 #include "rte_ether.h"
 #include "rte_eth_ctrl.h"
 #include "rte_dev_info.h"
@@ -702,6 +703,8 @@ struct rte_eth_desc_lim {
 	uint16_t nb_max;   /**< Max allowed number of descriptors. */
 	uint16_t nb_min;   /**< Min allowed number of descriptors. */
 	uint16_t nb_align; /**< Number of descriptors should be aligned to. */
+	uint16_t nb_seg_max;     /**< Max number of segments per whole packet. */
+	uint16_t nb_mtu_seg_max; /**< Max number of segments per one MTU */
 };
 
 /**
@@ -1191,6 +1194,11 @@ typedef uint16_t (*eth_tx_burst_t)(void *txq,
 				   uint16_t nb_pkts);
 /**< @internal Send output packets on a transmit queue of an Ethernet device. */
 
+typedef uint16_t (*eth_tx_prep_t)(void *txq,
+				   struct rte_mbuf **tx_pkts,
+				   uint16_t nb_pkts);
+/**< @internal Prepare output packets on a transmit queue of an Ethernet device. */
+
 typedef int (*flow_ctrl_get_t)(struct rte_eth_dev *dev,
 			       struct rte_eth_fc_conf *fc_conf);
 /**< @internal Get current flow control parameter on an Ethernet device */
@@ -1625,6 +1633,7 @@ struct rte_eth_rxtx_callback {
 struct rte_eth_dev {
 	eth_rx_burst_t rx_pkt_burst; /**< Pointer to PMD receive function. */
 	eth_tx_burst_t tx_pkt_burst; /**< Pointer to PMD transmit function. */
+	eth_tx_prep_t tx_pkt_prepare; /**< Pointer to PMD transmit prepare function. */
 	struct rte_eth_dev_data *data;  /**< Pointer to device data */
 	const struct eth_driver *driver;/**< Driver for this device */
 	const struct eth_dev_ops *dev_ops; /**< Functions exported by PMD */
@@ -2819,6 +2828,103 @@ int rte_eth_dev_set_vlan_ether_type(uint8_t port_id,
 	return (*dev->tx_pkt_burst)(dev->data->tx_queues[queue_id], tx_pkts, nb_pkts);
 }
 
+/**
+ * Process a burst of output packets on a transmit queue of an Ethernet device.
+ *
+ * The rte_eth_tx_prepare() function is invoked to prepare output packets to be
+ * transmitted on the output queue *queue_id* of the Ethernet device designated
+ * by its *port_id*.
+ * The *nb_pkts* parameter is the number of packets to be prepared which are
+ * supplied in the *tx_pkts* array of *rte_mbuf* structures, each of them
+ * allocated from a pool created with rte_pktmbuf_pool_create().
+ * For each packet to send, the rte_eth_tx_prepare() function performs
+ * the following operations:
+ *
+ * - Check if packet meets devices requirements for tx offloads.
+ *
+ * - Check limitations about number of segments.
+ *
+ * - Check additional requirements when debug is enabled.
+ *
+ * - Update and/or reset required checksums when tx offload is set for packet.
+ *
+ * Since this function can modify packet data, provided mbufs must be safely
+ * writable (e.g. modified data cannot be in shared segment).
+ *
+ * The rte_eth_tx_prepare() function returns the number of packets ready to be
+ * sent. A return value equal to *nb_pkts* means that all packets are valid and
+ * ready to be sent, otherwise stops processing on the first invalid packet and
+ * leaves the rest packets untouched.
+ *
+ * When this functionality is not implemented in the driver, all packets are
+ * are returned untouched.
+ *
+ * @param port_id
+ *   The port identifier of the Ethernet device.
+ *   The value must be a valid port id.
+ * @param queue_id
+ *   The index of the transmit queue through which output packets must be
+ *   sent.
+ *   The value must be in the range [0, nb_tx_queue - 1] previously supplied
+ *   to rte_eth_dev_configure().
+ * @param tx_pkts
+ *   The address of an array of *nb_pkts* pointers to *rte_mbuf* structures
+ *   which contain the output packets.
+ * @param nb_pkts
+ *   The maximum number of packets to process.
+ * @return
+ *   The number of packets correct and ready to be sent. The return value can be
+ *   less than the value of the *tx_pkts* parameter when some packet doesn't
+ *   meet devices requirements with rte_errno set appropriately:
+ *   - -EINVAL: offload flags are not correctly set
+ *   - -ENOTSUP: the offload feature is not supported by the hardware
+ *
+ */
+
+#ifdef RTE_ETHDEV_TX_PREPARE
+
+static inline uint16_t
+rte_eth_tx_prepare(uint8_t port_id, uint16_t queue_id,
+		struct rte_mbuf **tx_pkts, uint16_t nb_pkts)
+{
+	struct rte_eth_dev *dev;
+
+#ifdef RTE_LIBRTE_ETHDEV_DEBUG
+	if (!rte_eth_dev_is_valid_port(port_id)) {
+		RTE_PMD_DEBUG_TRACE("Invalid TX port_id=%d\n", port_id);
+		rte_errno = -EINVAL;
+		return 0;
+	}
+#endif
+
+	dev = &rte_eth_devices[port_id];
+
+#ifdef RTE_LIBRTE_ETHDEV_DEBUG
+	if (queue_id >= dev->data->nb_tx_queues) {
+		RTE_PMD_DEBUG_TRACE("Invalid TX queue_id=%d\n", queue_id);
+		rte_errno = -EINVAL;
+		return 0;
+	}
+#endif
+
+	if (!dev->tx_pkt_prepare)
+		return nb_pkts;
+
+	return (*dev->tx_pkt_prepare)(dev->data->tx_queues[queue_id],
+			tx_pkts, nb_pkts);
+}
+
+#else
+
+static inline uint16_t
+rte_eth_tx_prepare(__rte_unused uint8_t port_id, __rte_unused uint16_t queue_id,
+		__rte_unused struct rte_mbuf **tx_pkts, uint16_t nb_pkts)
+{
+	return nb_pkts;
+}
+
+#endif
+
 typedef void (*buffer_tx_error_fn)(struct rte_mbuf **unsent, uint16_t count,
 		void *userdata);
 
diff --git a/lib/librte_mbuf/rte_mbuf.h b/lib/librte_mbuf/rte_mbuf.h
index ead7c6e..39ee5ed 100644
--- a/lib/librte_mbuf/rte_mbuf.h
+++ b/lib/librte_mbuf/rte_mbuf.h
@@ -283,6 +283,19 @@
  */
 #define PKT_TX_OUTER_IPV6    (1ULL << 60)
 
+/**
+ * Bit Mask of all supported packet Tx offload features flags, which can be set
+ * for packet.
+ */
+#define PKT_TX_OFFLOAD_MASK (    \
+		PKT_TX_IP_CKSUM |        \
+		PKT_TX_L4_MASK |         \
+		PKT_TX_OUTER_IP_CKSUM |  \
+		PKT_TX_TCP_SEG |         \
+		PKT_TX_QINQ_PKT |        \
+		PKT_TX_VLAN_PKT |        \
+		PKT_TX_TUNNEL_MASK)
+
 #define __RESERVED           (1ULL << 61) /**< reserved for future mbuf use */
 
 #define IND_ATTACHED_MBUF    (1ULL << 62) /**< Indirect attached mbuf */
@@ -1647,6 +1660,57 @@ static inline int rte_pktmbuf_chain(struct rte_mbuf *head, struct rte_mbuf *tail
 }
 
 /**
+ * Validate general requirements for tx offload in mbuf.
+ *
+ * This function checks correctness and completeness of Tx offload settings.
+ *
+ * @param m
+ *   The packet mbuf to be validated.
+ * @return
+ *   0 if packet is valid
+ */
+static inline int
+rte_validate_tx_offload(const struct rte_mbuf *m)
+{
+	uint64_t ol_flags = m->ol_flags;
+	uint64_t inner_l3_offset = m->l2_len;
+
+	/* Does packet set any of available offloads? */
+	if (!(ol_flags & PKT_TX_OFFLOAD_MASK))
+		return 0;
+
+	if (ol_flags & PKT_TX_OUTER_IP_CKSUM)
+		inner_l3_offset += m->outer_l2_len + m->outer_l3_len;
+
+	/* Headers are fragmented */
+	if (rte_pktmbuf_data_len(m) < inner_l3_offset + m->l3_len + m->l4_len)
+		return -ENOTSUP;
+
+	/* IP checksum can be counted only for IPv4 packet */
+	if ((ol_flags & PKT_TX_IP_CKSUM) && (ol_flags & PKT_TX_IPV6))
+		return -EINVAL;
+
+	/* IP type not set when required */
+	if (ol_flags & (PKT_TX_L4_MASK | PKT_TX_TCP_SEG))
+		if (!(ol_flags & (PKT_TX_IPV4 | PKT_TX_IPV6)))
+			return -EINVAL;
+
+	/* Check requirements for TSO packet */
+	if (ol_flags & PKT_TX_TCP_SEG)
+		if ((m->tso_segsz == 0) ||
+				((ol_flags & PKT_TX_IPV4) &&
+				!(ol_flags & PKT_TX_IP_CKSUM)))
+			return -EINVAL;
+
+	/* PKT_TX_OUTER_IP_CKSUM set for non outer IPv4 packet. */
+	if ((ol_flags & PKT_TX_OUTER_IP_CKSUM) &&
+			!(ol_flags & PKT_TX_OUTER_IPV4))
+		return -EINVAL;
+
+	return 0;
+}
+
+/**
  * Dump an mbuf structure to a file.
  *
  * Dump all fields for the given packet mbuf and all its associated
diff --git a/lib/librte_net/rte_net.h b/lib/librte_net/rte_net.h
index d4156ae..85f356d 100644
--- a/lib/librte_net/rte_net.h
+++ b/lib/librte_net/rte_net.h
@@ -38,6 +38,11 @@
 extern "C" {
 #endif
 
+#include <rte_ip.h>
+#include <rte_udp.h>
+#include <rte_tcp.h>
+#include <rte_sctp.h>
+
 /**
  * Structure containing header lengths associated to a packet, filled
  * by rte_net_get_ptype().
@@ -86,6 +91,86 @@ struct rte_net_hdr_lens {
 uint32_t rte_net_get_ptype(const struct rte_mbuf *m,
 	struct rte_net_hdr_lens *hdr_lens, uint32_t layers);
 
+/**
+ * Prepare pseudo header checksum
+ *
+ * This function prepares pseudo header checksum for TSO and non-TSO tcp/udp in
+ * provided mbufs packet data.
+ *
+ * - for non-TSO tcp/udp packets full pseudo-header checksum is counted and set
+ *   in packet data,
+ * - for TSO the IP payload length is not included in pseudo header.
+ *
+ * This function expects that used headers are in the first data segment of
+ * mbuf, are not fragmented and can be safely modified.
+ *
+ * @param m
+ *   The packet mbuf to be fixed.
+ * @return
+ *   0 if checksum is initialized properly
+ */
+static inline int
+rte_net_intel_cksum_prepare(struct rte_mbuf *m)
+{
+	struct ipv4_hdr *ipv4_hdr;
+	struct ipv6_hdr *ipv6_hdr;
+	struct tcp_hdr *tcp_hdr;
+	struct udp_hdr *udp_hdr;
+	uint64_t ol_flags = m->ol_flags;
+	uint64_t inner_l3_offset = m->l2_len;
+
+	if (ol_flags & PKT_TX_OUTER_IP_CKSUM)
+		inner_l3_offset += m->outer_l2_len + m->outer_l3_len;
+
+	if ((ol_flags & PKT_TX_UDP_CKSUM) == PKT_TX_UDP_CKSUM) {
+		if (ol_flags & PKT_TX_IPV4) {
+			ipv4_hdr = rte_pktmbuf_mtod_offset(m, struct ipv4_hdr *,
+					inner_l3_offset);
+
+			if (ol_flags & PKT_TX_IP_CKSUM)
+				ipv4_hdr->hdr_checksum = 0;
+
+			udp_hdr = (struct udp_hdr *)((char *)ipv4_hdr +
+					m->l3_len);
+			udp_hdr->dgram_cksum = rte_ipv4_phdr_cksum(ipv4_hdr,
+					ol_flags);
+		} else {
+			ipv6_hdr = rte_pktmbuf_mtod_offset(m, struct ipv6_hdr *,
+					inner_l3_offset);
+			/* non-TSO udp */
+			udp_hdr = rte_pktmbuf_mtod_offset(m, struct udp_hdr *,
+					inner_l3_offset + m->l3_len);
+			udp_hdr->dgram_cksum = rte_ipv6_phdr_cksum(ipv6_hdr,
+					ol_flags);
+		}
+	} else if ((ol_flags & PKT_TX_TCP_CKSUM) ||
+			(ol_flags & PKT_TX_TCP_SEG)) {
+		if (ol_flags & PKT_TX_IPV4) {
+			ipv4_hdr = rte_pktmbuf_mtod_offset(m, struct ipv4_hdr *,
+					inner_l3_offset);
+
+			if (ol_flags & PKT_TX_IP_CKSUM)
+				ipv4_hdr->hdr_checksum = 0;
+
+			/* non-TSO tcp or TSO */
+			tcp_hdr = (struct tcp_hdr *)((char *)ipv4_hdr +
+					m->l3_len);
+			tcp_hdr->cksum = rte_ipv4_phdr_cksum(ipv4_hdr,
+					ol_flags);
+		} else {
+			ipv6_hdr = rte_pktmbuf_mtod_offset(m, struct ipv6_hdr *,
+					inner_l3_offset);
+			/* non-TSO tcp or TSO */
+			tcp_hdr = rte_pktmbuf_mtod_offset(m, struct tcp_hdr *,
+					inner_l3_offset + m->l3_len);
+			tcp_hdr->cksum = rte_ipv6_phdr_cksum(ipv6_hdr,
+					ol_flags);
+		}
+	}
+
+	return 0;
+}
+
 #ifdef __cplusplus
 }
 #endif
