/* SPDX-License-Identifier: BSD-3-Clause
 * Copyright(c) 2010-2016 Intel Corporation
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <stdint.h>
#include <stdarg.h>
#include <unistd.h>
#include <inttypes.h>
#include <sys/queue.h>

#include <rte_string_fns.h>
#include <rte_memzone.h>
#include <rte_mbuf.h>
#include <rte_malloc.h>
#include <rte_ether.h>
#include <ethdev_driver.h>
#include <rte_tcp.h>
#include <rte_sctp.h>
#include <rte_udp.h>
#include <rte_ip.h>
#include <rte_net.h>
#include <rte_vect.h>

#include "i40e_logs.h"
#include "base/i40e_prototype.h"
#include "base/i40e_type.h"
#include "i40e_ethdev.h"
#include "i40e_rxtx.h"

#define DEFAULT_TX_RS_THRESH   32
#define DEFAULT_TX_FREE_THRESH 32

#define I40E_TX_MAX_BURST  32

#define I40E_DMA_MEM_ALIGN 4096

/* Base address of the HW descriptor ring should be 128B aligned. */
#define I40E_RING_BASE_ALIGN    128

#define I40E_TXD_CMD (I40E_TX_DESC_CMD_EOP | I40E_TX_DESC_CMD_RS)

#ifdef RTE_LIBRTE_IEEE1588
#define I40E_TX_IEEE1588_TMST PKT_TX_IEEE1588_TMST
#else
#define I40E_TX_IEEE1588_TMST 0
#endif

#define I40E_TX_CKSUM_OFFLOAD_MASK (             \
                PKT_TX_IP_CKSUM |                \
                PKT_TX_L4_MASK |                 \
                PKT_TX_TCP_SEG |                 \
                PKT_TX_OUTER_IP_CKSUM)

#define I40E_TX_OFFLOAD_MASK (  \
                PKT_TX_OUTER_IPV4 |     \
                PKT_TX_OUTER_IPV6 |     \
                PKT_TX_IPV4 |           \
                PKT_TX_IPV6 |           \
                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 |    \
                I40E_TX_IEEE1588_TMST)

#define I40E_TX_OFFLOAD_NOTSUP_MASK \
                (PKT_TX_OFFLOAD_MASK ^ I40E_TX_OFFLOAD_MASK)

#define I40E_TX_OFFLOAD_SIMPLE_SUP_MASK ( \
                PKT_TX_IPV4 | \
                PKT_TX_IPV6 | \
                PKT_TX_OUTER_IPV4 | \
                PKT_TX_OUTER_IPV6)

#define I40E_TX_OFFLOAD_SIMPLE_NOTSUP_MASK \
                (PKT_TX_OFFLOAD_MASK ^ I40E_TX_OFFLOAD_SIMPLE_SUP_MASK)

static int
i40e_monitor_callback(const uint64_t value,
                const uint64_t arg[RTE_POWER_MONITOR_OPAQUE_SZ] __rte_unused)
{
        const uint64_t m = rte_cpu_to_le_64(1 << I40E_RX_DESC_STATUS_DD_SHIFT);
        /*
         * we expect the DD bit to be set to 1 if this descriptor was already
         * written to.
         */
        return (value & m) == m ? -1 : 0;
}

int
i40e_get_monitor_addr(void *rx_queue, struct rte_power_monitor_cond *pmc)
{
        struct i40e_rx_queue *rxq = rx_queue;
        volatile union i40e_rx_desc *rxdp;
        uint16_t desc;

        desc = rxq->rx_tail;
        rxdp = &rxq->rx_ring[desc];
        /* watch for changes in status bit */
        pmc->addr = &rxdp->wb.qword1.status_error_len;

        /* comparison callback */
        pmc->fn = i40e_monitor_callback;

        /* registers are 64-bit */
        pmc->size = sizeof(uint64_t);

        return 0;
}

static inline void
i40e_rxd_to_vlan_tci(struct rte_mbuf *mb, volatile union i40e_rx_desc *rxdp)
{
        if (rte_le_to_cpu_64(rxdp->wb.qword1.status_error_len) &
                (1 << I40E_RX_DESC_STATUS_L2TAG1P_SHIFT)) {
                mb->ol_flags |= PKT_RX_VLAN | PKT_RX_VLAN_STRIPPED;
                mb->vlan_tci =
                        rte_le_to_cpu_16(rxdp->wb.qword0.lo_dword.l2tag1);
                PMD_RX_LOG(DEBUG, "Descriptor l2tag1: %u",
                           rte_le_to_cpu_16(rxdp->wb.qword0.lo_dword.l2tag1));
        } else {
                mb->vlan_tci = 0;
        }
#ifndef RTE_LIBRTE_I40E_16BYTE_RX_DESC
        if (rte_le_to_cpu_16(rxdp->wb.qword2.ext_status) &
                (1 << I40E_RX_DESC_EXT_STATUS_L2TAG2P_SHIFT)) {
                mb->ol_flags |= PKT_RX_QINQ_STRIPPED | PKT_RX_QINQ |
                        PKT_RX_VLAN_STRIPPED | PKT_RX_VLAN;
                mb->vlan_tci_outer = mb->vlan_tci;
                mb->vlan_tci = rte_le_to_cpu_16(rxdp->wb.qword2.l2tag2_2);
                PMD_RX_LOG(DEBUG, "Descriptor l2tag2_1: %u, l2tag2_2: %u",
                           rte_le_to_cpu_16(rxdp->wb.qword2.l2tag2_1),
                           rte_le_to_cpu_16(rxdp->wb.qword2.l2tag2_2));
        } else {
                mb->vlan_tci_outer = 0;
        }
#endif
        PMD_RX_LOG(DEBUG, "Mbuf vlan_tci: %u, vlan_tci_outer: %u",
                   mb->vlan_tci, mb->vlan_tci_outer);
}

/* Translate the rx descriptor status to pkt flags */
static inline uint64_t
i40e_rxd_status_to_pkt_flags(uint64_t qword)
{
        uint64_t flags;

        /* Check if RSS_HASH */
        flags = (((qword >> I40E_RX_DESC_STATUS_FLTSTAT_SHIFT) &
                                        I40E_RX_DESC_FLTSTAT_RSS_HASH) ==
                        I40E_RX_DESC_FLTSTAT_RSS_HASH) ? PKT_RX_RSS_HASH : 0;

        /* Check if FDIR Match */
        flags |= (qword & (1 << I40E_RX_DESC_STATUS_FLM_SHIFT) ?
                                                        PKT_RX_FDIR : 0);

        return flags;
}

static inline uint64_t
i40e_rxd_error_to_pkt_flags(uint64_t qword)
{
        uint64_t flags = 0;
        uint64_t error_bits = (qword >> I40E_RXD_QW1_ERROR_SHIFT);

#define I40E_RX_ERR_BITS 0x3f
        if (likely((error_bits & I40E_RX_ERR_BITS) == 0)) {
                flags |= (PKT_RX_IP_CKSUM_GOOD | PKT_RX_L4_CKSUM_GOOD);
                return flags;
        }

        if (unlikely(error_bits & (1 << I40E_RX_DESC_ERROR_IPE_SHIFT)))
                flags |= PKT_RX_IP_CKSUM_BAD;
        else
                flags |= PKT_RX_IP_CKSUM_GOOD;

        if (unlikely(error_bits & (1 << I40E_RX_DESC_ERROR_L4E_SHIFT)))
                flags |= PKT_RX_L4_CKSUM_BAD;
        else
                flags |= PKT_RX_L4_CKSUM_GOOD;

        if (unlikely(error_bits & (1 << I40E_RX_DESC_ERROR_EIPE_SHIFT)))
                flags |= PKT_RX_OUTER_IP_CKSUM_BAD;

        return flags;
}

/* Function to check and set the ieee1588 timesync index and get the
 * appropriate flags.
 */
#ifdef RTE_LIBRTE_IEEE1588
static inline uint64_t
i40e_get_iee15888_flags(struct rte_mbuf *mb, uint64_t qword)
{
        uint64_t pkt_flags = 0;
        uint16_t tsyn = (qword & (I40E_RXD_QW1_STATUS_TSYNVALID_MASK
                                  | I40E_RXD_QW1_STATUS_TSYNINDX_MASK))
                                    >> I40E_RX_DESC_STATUS_TSYNINDX_SHIFT;

        if ((mb->packet_type & RTE_PTYPE_L2_MASK)
                        == RTE_PTYPE_L2_ETHER_TIMESYNC)
                pkt_flags = PKT_RX_IEEE1588_PTP;
        if (tsyn & 0x04) {
                pkt_flags |= PKT_RX_IEEE1588_TMST;
                mb->timesync = tsyn & 0x03;
        }

        return pkt_flags;
}
#endif

static inline uint64_t
i40e_rxd_build_fdir(volatile union i40e_rx_desc *rxdp, struct rte_mbuf *mb)
{
        uint64_t flags = 0;
#ifndef RTE_LIBRTE_I40E_16BYTE_RX_DESC
        uint16_t flexbh, flexbl;

        flexbh = (rte_le_to_cpu_32(rxdp->wb.qword2.ext_status) >>
                I40E_RX_DESC_EXT_STATUS_FLEXBH_SHIFT) &
                I40E_RX_DESC_EXT_STATUS_FLEXBH_MASK;
        flexbl = (rte_le_to_cpu_32(rxdp->wb.qword2.ext_status) >>
                I40E_RX_DESC_EXT_STATUS_FLEXBL_SHIFT) &
                I40E_RX_DESC_EXT_STATUS_FLEXBL_MASK;


        if (flexbh == I40E_RX_DESC_EXT_STATUS_FLEXBH_FD_ID) {
                mb->hash.fdir.hi =
                        rte_le_to_cpu_32(rxdp->wb.qword3.hi_dword.fd_id);
                flags |= PKT_RX_FDIR_ID;
        } else if (flexbh == I40E_RX_DESC_EXT_STATUS_FLEXBH_FLEX) {
                mb->hash.fdir.hi =
                        rte_le_to_cpu_32(rxdp->wb.qword3.hi_dword.flex_bytes_hi);
                flags |= PKT_RX_FDIR_FLX;
        }
        if (flexbl == I40E_RX_DESC_EXT_STATUS_FLEXBL_FLEX) {
                mb->hash.fdir.lo =
                        rte_le_to_cpu_32(rxdp->wb.qword3.lo_dword.flex_bytes_lo);
                flags |= PKT_RX_FDIR_FLX;
        }
#else
        mb->hash.fdir.hi =
                rte_le_to_cpu_32(rxdp->wb.qword0.hi_dword.fd_id);
        flags |= PKT_RX_FDIR_ID;
#endif
        return flags;
}

static inline void
i40e_parse_tunneling_params(uint64_t ol_flags,
                            union i40e_tx_offload tx_offload,
                            uint32_t *cd_tunneling)
{
        /* EIPT: External (outer) IP header type */
        if (ol_flags & PKT_TX_OUTER_IP_CKSUM)
                *cd_tunneling |= I40E_TX_CTX_EXT_IP_IPV4;
        else if (ol_flags & PKT_TX_OUTER_IPV4)
                *cd_tunneling |= I40E_TX_CTX_EXT_IP_IPV4_NO_CSUM;
        else if (ol_flags & PKT_TX_OUTER_IPV6)
                *cd_tunneling |= I40E_TX_CTX_EXT_IP_IPV6;

        /* EIPLEN: External (outer) IP header length, in DWords */
        *cd_tunneling |= (tx_offload.outer_l3_len >> 2) <<
                I40E_TXD_CTX_QW0_EXT_IPLEN_SHIFT;

        /* L4TUNT: L4 Tunneling Type */
        switch (ol_flags & PKT_TX_TUNNEL_MASK) {
        case PKT_TX_TUNNEL_IPIP:
                /* for non UDP / GRE tunneling, set to 00b */
                break;
        case PKT_TX_TUNNEL_VXLAN:
        case PKT_TX_TUNNEL_GENEVE:
                *cd_tunneling |= I40E_TXD_CTX_UDP_TUNNELING;
                break;
        case PKT_TX_TUNNEL_GRE:
                *cd_tunneling |= I40E_TXD_CTX_GRE_TUNNELING;
                break;
        default:
                PMD_TX_LOG(ERR, "Tunnel type not supported");
                return;
        }

        /* L4TUNLEN: L4 Tunneling Length, in Words
         *
         * We depend on app to set rte_mbuf.l2_len correctly.
         * For IP in GRE it should be set to the length of the GRE
         * header;
         * for MAC in GRE or MAC in UDP it should be set to the length
         * of the GRE or UDP headers plus the inner MAC up to including
         * its last Ethertype.
         */
        *cd_tunneling |= (tx_offload.l2_len >> 1) <<
                I40E_TXD_CTX_QW0_NATLEN_SHIFT;
}

static inline void
i40e_txd_enable_checksum(uint64_t ol_flags,
                        uint32_t *td_cmd,
                        uint32_t *td_offset,
                        union i40e_tx_offload tx_offload)
{
        /* Set MACLEN */
        if (ol_flags & PKT_TX_TUNNEL_MASK)
                *td_offset |= (tx_offload.outer_l2_len >> 1)
                                << I40E_TX_DESC_LENGTH_MACLEN_SHIFT;
        else
                *td_offset |= (tx_offload.l2_len >> 1)
                        << I40E_TX_DESC_LENGTH_MACLEN_SHIFT;

        /* Enable L3 checksum offloads */
        if (ol_flags & PKT_TX_IP_CKSUM) {
                *td_cmd |= I40E_TX_DESC_CMD_IIPT_IPV4_CSUM;
                *td_offset |= (tx_offload.l3_len >> 2)
                                << I40E_TX_DESC_LENGTH_IPLEN_SHIFT;
        } else if (ol_flags & PKT_TX_IPV4) {
                *td_cmd |= I40E_TX_DESC_CMD_IIPT_IPV4;
                *td_offset |= (tx_offload.l3_len >> 2)
                                << I40E_TX_DESC_LENGTH_IPLEN_SHIFT;
        } else if (ol_flags & PKT_TX_IPV6) {
                *td_cmd |= I40E_TX_DESC_CMD_IIPT_IPV6;
                *td_offset |= (tx_offload.l3_len >> 2)
                                << I40E_TX_DESC_LENGTH_IPLEN_SHIFT;
        }

        if (ol_flags & PKT_TX_TCP_SEG) {
                *td_cmd |= I40E_TX_DESC_CMD_L4T_EOFT_TCP;
                *td_offset |= (tx_offload.l4_len >> 2)
                        << I40E_TX_DESC_LENGTH_L4_FC_LEN_SHIFT;
                return;
        }

        /* Enable L4 checksum offloads */
        switch (ol_flags & PKT_TX_L4_MASK) {
        case PKT_TX_TCP_CKSUM:
                *td_cmd |= I40E_TX_DESC_CMD_L4T_EOFT_TCP;
                *td_offset |= (sizeof(struct rte_tcp_hdr) >> 2) <<
                                I40E_TX_DESC_LENGTH_L4_FC_LEN_SHIFT;
                break;
        case PKT_TX_SCTP_CKSUM:
                *td_cmd |= I40E_TX_DESC_CMD_L4T_EOFT_SCTP;
                *td_offset |= (sizeof(struct rte_sctp_hdr) >> 2) <<
                                I40E_TX_DESC_LENGTH_L4_FC_LEN_SHIFT;
                break;
        case PKT_TX_UDP_CKSUM:
                *td_cmd |= I40E_TX_DESC_CMD_L4T_EOFT_UDP;
                *td_offset |= (sizeof(struct rte_udp_hdr) >> 2) <<
                                I40E_TX_DESC_LENGTH_L4_FC_LEN_SHIFT;
                break;
        default:
                break;
        }
}

/* Construct the tx flags */
static inline uint64_t
i40e_build_ctob(uint32_t td_cmd,
                uint32_t td_offset,
                unsigned int size,
                uint32_t td_tag)
{
        return rte_cpu_to_le_64(I40E_TX_DESC_DTYPE_DATA |
                        ((uint64_t)td_cmd  << I40E_TXD_QW1_CMD_SHIFT) |
                        ((uint64_t)td_offset << I40E_TXD_QW1_OFFSET_SHIFT) |
                        ((uint64_t)size  << I40E_TXD_QW1_TX_BUF_SZ_SHIFT) |
                        ((uint64_t)td_tag  << I40E_TXD_QW1_L2TAG1_SHIFT));
}

static inline int
i40e_xmit_cleanup(struct i40e_tx_queue *txq)
{
        struct i40e_tx_entry *sw_ring = txq->sw_ring;
        volatile struct i40e_tx_desc *txd = txq->tx_ring;
        uint16_t last_desc_cleaned = txq->last_desc_cleaned;
        uint16_t nb_tx_desc = txq->nb_tx_desc;
        uint16_t desc_to_clean_to;
        uint16_t nb_tx_to_clean;

        desc_to_clean_to = (uint16_t)(last_desc_cleaned + txq->tx_rs_thresh);
        if (desc_to_clean_to >= nb_tx_desc)
                desc_to_clean_to = (uint16_t)(desc_to_clean_to - nb_tx_desc);

        desc_to_clean_to = sw_ring[desc_to_clean_to].last_id;
        if ((txd[desc_to_clean_to].cmd_type_offset_bsz &
                        rte_cpu_to_le_64(I40E_TXD_QW1_DTYPE_MASK)) !=
                        rte_cpu_to_le_64(I40E_TX_DESC_DTYPE_DESC_DONE)) {
                PMD_TX_LOG(DEBUG, "TX descriptor %4u is not done "
                           "(port=%d queue=%d)", desc_to_clean_to,
                           txq->port_id, txq->queue_id);
                return -1;
        }

        if (last_desc_cleaned > desc_to_clean_to)
                nb_tx_to_clean = (uint16_t)((nb_tx_desc - last_desc_cleaned) +
                                                        desc_to_clean_to);
        else
                nb_tx_to_clean = (uint16_t)(desc_to_clean_to -
                                        last_desc_cleaned);

        txd[desc_to_clean_to].cmd_type_offset_bsz = 0;

        txq->last_desc_cleaned = desc_to_clean_to;
        txq->nb_tx_free = (uint16_t)(txq->nb_tx_free + nb_tx_to_clean);

        return 0;
}

static inline int
#ifdef RTE_LIBRTE_I40E_RX_ALLOW_BULK_ALLOC
check_rx_burst_bulk_alloc_preconditions(struct i40e_rx_queue *rxq)
#else
check_rx_burst_bulk_alloc_preconditions(__rte_unused struct i40e_rx_queue *rxq)
#endif
{
        int ret = 0;

#ifdef RTE_LIBRTE_I40E_RX_ALLOW_BULK_ALLOC
        if (!(rxq->rx_free_thresh >= RTE_PMD_I40E_RX_MAX_BURST)) {
                PMD_INIT_LOG(DEBUG, "Rx Burst Bulk Alloc Preconditions: "
                             "rxq->rx_free_thresh=%d, "
                             "RTE_PMD_I40E_RX_MAX_BURST=%d",
                             rxq->rx_free_thresh, RTE_PMD_I40E_RX_MAX_BURST);
                ret = -EINVAL;
        } else if (!(rxq->rx_free_thresh < rxq->nb_rx_desc)) {
                PMD_INIT_LOG(DEBUG, "Rx Burst Bulk Alloc Preconditions: "
                             "rxq->rx_free_thresh=%d, "
                             "rxq->nb_rx_desc=%d",
                             rxq->rx_free_thresh, rxq->nb_rx_desc);
                ret = -EINVAL;
        } else if (rxq->nb_rx_desc % rxq->rx_free_thresh != 0) {
                PMD_INIT_LOG(DEBUG, "Rx Burst Bulk Alloc Preconditions: "
                             "rxq->nb_rx_desc=%d, "
                             "rxq->rx_free_thresh=%d",
                             rxq->nb_rx_desc, rxq->rx_free_thresh);
                ret = -EINVAL;
        }
#else
        ret = -EINVAL;
#endif

        return ret;
}

#ifdef RTE_LIBRTE_I40E_RX_ALLOW_BULK_ALLOC
#define I40E_LOOK_AHEAD 8
#if (I40E_LOOK_AHEAD != 8)
#error "PMD I40E: I40E_LOOK_AHEAD must be 8\n"
#endif
static inline int
i40e_rx_scan_hw_ring(struct i40e_rx_queue *rxq)
{
        volatile union i40e_rx_desc *rxdp;
        struct i40e_rx_entry *rxep;
        struct rte_mbuf *mb;
        uint16_t pkt_len;
        uint64_t qword1;
        uint32_t rx_status;
        int32_t s[I40E_LOOK_AHEAD], var, nb_dd;
        int32_t i, j, nb_rx = 0;
        uint64_t pkt_flags;
        uint32_t *ptype_tbl = rxq->vsi->adapter->ptype_tbl;

        rxdp = &rxq->rx_ring[rxq->rx_tail];
        rxep = &rxq->sw_ring[rxq->rx_tail];

        qword1 = rte_le_to_cpu_64(rxdp->wb.qword1.status_error_len);
        rx_status = (qword1 & I40E_RXD_QW1_STATUS_MASK) >>
                                I40E_RXD_QW1_STATUS_SHIFT;

        /* Make sure there is at least 1 packet to receive */
        if (!(rx_status & (1 << I40E_RX_DESC_STATUS_DD_SHIFT)))
                return 0;

        /**
         * Scan LOOK_AHEAD descriptors at a time to determine which
         * descriptors reference packets that are ready to be received.
         */
        for (i = 0; i < RTE_PMD_I40E_RX_MAX_BURST; i+=I40E_LOOK_AHEAD,
                        rxdp += I40E_LOOK_AHEAD, rxep += I40E_LOOK_AHEAD) {
                /* Read desc statuses backwards to avoid race condition */
                for (j = I40E_LOOK_AHEAD - 1; j >= 0; j--) {
                        qword1 = rte_le_to_cpu_64(\
                                rxdp[j].wb.qword1.status_error_len);
                        s[j] = (qword1 & I40E_RXD_QW1_STATUS_MASK) >>
                                        I40E_RXD_QW1_STATUS_SHIFT;
                }

                /* This barrier is to order loads of different words in the descriptor */
                rte_atomic_thread_fence(__ATOMIC_ACQUIRE);

                /* Compute how many status bits were set */
                for (j = 0, nb_dd = 0; j < I40E_LOOK_AHEAD; j++) {
                        var = s[j] & (1 << I40E_RX_DESC_STATUS_DD_SHIFT);
#ifdef RTE_ARCH_ARM
                        /* For Arm platforms, only compute continuous status bits */
                        if (var)
                                nb_dd += 1;
                        else
                                break;
#else
                        nb_dd += var;
#endif
                }

                nb_rx += nb_dd;

                /* Translate descriptor info to mbuf parameters */
                for (j = 0; j < nb_dd; j++) {
                        mb = rxep[j].mbuf;
                        qword1 = rte_le_to_cpu_64(\
                                rxdp[j].wb.qword1.status_error_len);
                        pkt_len = ((qword1 & I40E_RXD_QW1_LENGTH_PBUF_MASK) >>
                                I40E_RXD_QW1_LENGTH_PBUF_SHIFT) - rxq->crc_len;
                        mb->data_len = pkt_len;
                        mb->pkt_len = pkt_len;
                        mb->ol_flags = 0;
                        i40e_rxd_to_vlan_tci(mb, &rxdp[j]);
                        pkt_flags = i40e_rxd_status_to_pkt_flags(qword1);
                        pkt_flags |= i40e_rxd_error_to_pkt_flags(qword1);
                        mb->packet_type =
                                ptype_tbl[(uint8_t)((qword1 &
                                I40E_RXD_QW1_PTYPE_MASK) >>
                                I40E_RXD_QW1_PTYPE_SHIFT)];
                        if (pkt_flags & PKT_RX_RSS_HASH)
                                mb->hash.rss = rte_le_to_cpu_32(\
                                        rxdp[j].wb.qword0.hi_dword.rss);
                        if (pkt_flags & PKT_RX_FDIR)
                                pkt_flags |= i40e_rxd_build_fdir(&rxdp[j], mb);

#ifdef RTE_LIBRTE_IEEE1588
                        pkt_flags |= i40e_get_iee15888_flags(mb, qword1);
#endif
                        mb->ol_flags |= pkt_flags;

                }

                for (j = 0; j < I40E_LOOK_AHEAD; j++)
                        rxq->rx_stage[i + j] = rxep[j].mbuf;

                if (nb_dd != I40E_LOOK_AHEAD)
                        break;
        }

        /* Clear software ring entries */
        for (i = 0; i < nb_rx; i++)
                rxq->sw_ring[rxq->rx_tail + i].mbuf = NULL;

        return nb_rx;
}

static inline uint16_t
i40e_rx_fill_from_stage(struct i40e_rx_queue *rxq,
                        struct rte_mbuf **rx_pkts,
                        uint16_t nb_pkts)
{
        uint16_t i;
        struct rte_mbuf **stage = &rxq->rx_stage[rxq->rx_next_avail];

        nb_pkts = (uint16_t)RTE_MIN(nb_pkts, rxq->rx_nb_avail);

        for (i = 0; i < nb_pkts; i++)
                rx_pkts[i] = stage[i];

        rxq->rx_nb_avail = (uint16_t)(rxq->rx_nb_avail - nb_pkts);
        rxq->rx_next_avail = (uint16_t)(rxq->rx_next_avail + nb_pkts);

        return nb_pkts;
}

static inline int
i40e_rx_alloc_bufs(struct i40e_rx_queue *rxq)
{
        volatile union i40e_rx_desc *rxdp;
        struct i40e_rx_entry *rxep;
        struct rte_mbuf *mb;
        uint16_t alloc_idx, i;
        uint64_t dma_addr;
        int diag;

        /* Allocate buffers in bulk */
        alloc_idx = (uint16_t)(rxq->rx_free_trigger -
                                (rxq->rx_free_thresh - 1));
        rxep = &(rxq->sw_ring[alloc_idx]);
        diag = rte_mempool_get_bulk(rxq->mp, (void *)rxep,
                                        rxq->rx_free_thresh);
        if (unlikely(diag != 0)) {
                PMD_DRV_LOG(ERR, "Failed to get mbufs in bulk");
                return -ENOMEM;
        }

        rxdp = &rxq->rx_ring[alloc_idx];
        for (i = 0; i < rxq->rx_free_thresh; i++) {
                if (likely(i < (rxq->rx_free_thresh - 1)))
                        /* Prefetch next mbuf */
                        rte_prefetch0(rxep[i + 1].mbuf);

                mb = rxep[i].mbuf;
                rte_mbuf_refcnt_set(mb, 1);
                mb->next = NULL;
                mb->data_off = RTE_PKTMBUF_HEADROOM;
                mb->nb_segs = 1;
                mb->port = rxq->port_id;
                dma_addr = rte_cpu_to_le_64(\
                        rte_mbuf_data_iova_default(mb));
                rxdp[i].read.hdr_addr = 0;
                rxdp[i].read.pkt_addr = dma_addr;
        }

        /* Update rx tail regsiter */
        I40E_PCI_REG_WRITE(rxq->qrx_tail, rxq->rx_free_trigger);

        rxq->rx_free_trigger =
                (uint16_t)(rxq->rx_free_trigger + rxq->rx_free_thresh);
        if (rxq->rx_free_trigger >= rxq->nb_rx_desc)
                rxq->rx_free_trigger = (uint16_t)(rxq->rx_free_thresh - 1);

        return 0;
}

static inline uint16_t
rx_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t nb_pkts)
{
        struct i40e_rx_queue *rxq = (struct i40e_rx_queue *)rx_queue;
        struct rte_eth_dev *dev;
        uint16_t nb_rx = 0;

        if (!nb_pkts)
                return 0;

        if (rxq->rx_nb_avail)
                return i40e_rx_fill_from_stage(rxq, rx_pkts, nb_pkts);

        nb_rx = (uint16_t)i40e_rx_scan_hw_ring(rxq);
        rxq->rx_next_avail = 0;
        rxq->rx_nb_avail = nb_rx;
        rxq->rx_tail = (uint16_t)(rxq->rx_tail + nb_rx);

        if (rxq->rx_tail > rxq->rx_free_trigger) {
                if (i40e_rx_alloc_bufs(rxq) != 0) {
                        uint16_t i, j;

                        dev = I40E_VSI_TO_ETH_DEV(rxq->vsi);
                        dev->data->rx_mbuf_alloc_failed +=
                                rxq->rx_free_thresh;

                        rxq->rx_nb_avail = 0;
                        rxq->rx_tail = (uint16_t)(rxq->rx_tail - nb_rx);
                        for (i = 0, j = rxq->rx_tail; i < nb_rx; i++, j++)
                                rxq->sw_ring[j].mbuf = rxq->rx_stage[i];

                        return 0;
                }
        }

        if (rxq->rx_tail >= rxq->nb_rx_desc)
                rxq->rx_tail = 0;

        if (rxq->rx_nb_avail)
                return i40e_rx_fill_from_stage(rxq, rx_pkts, nb_pkts);

        return 0;
}

static uint16_t
i40e_recv_pkts_bulk_alloc(void *rx_queue,
                          struct rte_mbuf **rx_pkts,
                          uint16_t nb_pkts)
{
        uint16_t nb_rx = 0, n, count;

        if (unlikely(nb_pkts == 0))
                return 0;

        if (likely(nb_pkts <= RTE_PMD_I40E_RX_MAX_BURST))
                return rx_recv_pkts(rx_queue, rx_pkts, nb_pkts);

        while (nb_pkts) {
                n = RTE_MIN(nb_pkts, RTE_PMD_I40E_RX_MAX_BURST);
                count = rx_recv_pkts(rx_queue, &rx_pkts[nb_rx], n);
                nb_rx = (uint16_t)(nb_rx + count);
                nb_pkts = (uint16_t)(nb_pkts - count);
                if (count < n)
                        break;
        }

        return nb_rx;
}
#else
static uint16_t
i40e_recv_pkts_bulk_alloc(void __rte_unused *rx_queue,
                          struct rte_mbuf __rte_unused **rx_pkts,
                          uint16_t __rte_unused nb_pkts)
{
        return 0;
}
#endif /* RTE_LIBRTE_I40E_RX_ALLOW_BULK_ALLOC */

uint16_t
i40e_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t nb_pkts)
{
        struct i40e_rx_queue *rxq;
        volatile union i40e_rx_desc *rx_ring;
        volatile union i40e_rx_desc *rxdp;
        union i40e_rx_desc rxd;
        struct i40e_rx_entry *sw_ring;
        struct i40e_rx_entry *rxe;
        struct rte_eth_dev *dev;
        struct rte_mbuf *rxm;
        struct rte_mbuf *nmb;
        uint16_t nb_rx;
        uint32_t rx_status;
        uint64_t qword1;
        uint16_t rx_packet_len;
        uint16_t rx_id, nb_hold;
        uint64_t dma_addr;
        uint64_t pkt_flags;
        uint32_t *ptype_tbl;

        nb_rx = 0;
        nb_hold = 0;
        rxq = rx_queue;
        rx_id = rxq->rx_tail;
        rx_ring = rxq->rx_ring;
        sw_ring = rxq->sw_ring;
        ptype_tbl = rxq->vsi->adapter->ptype_tbl;

        while (nb_rx < nb_pkts) {
                rxdp = &rx_ring[rx_id];
                qword1 = rte_le_to_cpu_64(rxdp->wb.qword1.status_error_len);
                rx_status = (qword1 & I40E_RXD_QW1_STATUS_MASK)
                                >> I40E_RXD_QW1_STATUS_SHIFT;

                /* Check the DD bit first */
                if (!(rx_status & (1 << I40E_RX_DESC_STATUS_DD_SHIFT)))
                        break;

                nmb = rte_mbuf_raw_alloc(rxq->mp);
                if (unlikely(!nmb)) {
                        dev = I40E_VSI_TO_ETH_DEV(rxq->vsi);
                        dev->data->rx_mbuf_alloc_failed++;
                        break;
                }

                rxd = *rxdp;
                nb_hold++;
                rxe = &sw_ring[rx_id];
                rx_id++;
                if (unlikely(rx_id == rxq->nb_rx_desc))
                        rx_id = 0;

                /* Prefetch next mbuf */
                rte_prefetch0(sw_ring[rx_id].mbuf);

                /**
                 * When next RX descriptor is on a cache line boundary,
                 * prefetch the next 4 RX descriptors and next 8 pointers
                 * to mbufs.
                 */
                if ((rx_id & 0x3) == 0) {
                        rte_prefetch0(&rx_ring[rx_id]);
                        rte_prefetch0(&sw_ring[rx_id]);
                }
                rxm = rxe->mbuf;
                rxe->mbuf = nmb;
                dma_addr =
                        rte_cpu_to_le_64(rte_mbuf_data_iova_default(nmb));
                rxdp->read.hdr_addr = 0;
                rxdp->read.pkt_addr = dma_addr;

                rx_packet_len = ((qword1 & I40E_RXD_QW1_LENGTH_PBUF_MASK) >>
                                I40E_RXD_QW1_LENGTH_PBUF_SHIFT) - rxq->crc_len;

                rxm->data_off = RTE_PKTMBUF_HEADROOM;
                rte_prefetch0(RTE_PTR_ADD(rxm->buf_addr, RTE_PKTMBUF_HEADROOM));
                rxm->nb_segs = 1;
                rxm->next = NULL;
                rxm->pkt_len = rx_packet_len;
                rxm->data_len = rx_packet_len;
                rxm->port = rxq->port_id;
                rxm->ol_flags = 0;
                i40e_rxd_to_vlan_tci(rxm, &rxd);
                pkt_flags = i40e_rxd_status_to_pkt_flags(qword1);
                pkt_flags |= i40e_rxd_error_to_pkt_flags(qword1);
                rxm->packet_type =
                        ptype_tbl[(uint8_t)((qword1 &
                        I40E_RXD_QW1_PTYPE_MASK) >> I40E_RXD_QW1_PTYPE_SHIFT)];
                if (pkt_flags & PKT_RX_RSS_HASH)
                        rxm->hash.rss =
                                rte_le_to_cpu_32(rxd.wb.qword0.hi_dword.rss);
                if (pkt_flags & PKT_RX_FDIR)
                        pkt_flags |= i40e_rxd_build_fdir(&rxd, rxm);

#ifdef RTE_LIBRTE_IEEE1588
                pkt_flags |= i40e_get_iee15888_flags(rxm, qword1);
#endif
                rxm->ol_flags |= pkt_flags;

                rx_pkts[nb_rx++] = rxm;
        }
        rxq->rx_tail = rx_id;

        /**
         * If the number of free RX descriptors is greater than the RX free
         * threshold of the queue, advance the receive tail register of queue.
         * Update that register with the value of the last processed RX
         * descriptor minus 1.
         */
        nb_hold = (uint16_t)(nb_hold + rxq->nb_rx_hold);
        if (nb_hold > rxq->rx_free_thresh) {
                rx_id = (uint16_t) ((rx_id == 0) ?
                        (rxq->nb_rx_desc - 1) : (rx_id - 1));
                I40E_PCI_REG_WC_WRITE(rxq->qrx_tail, rx_id);
                nb_hold = 0;
        }
        rxq->nb_rx_hold = nb_hold;

        return nb_rx;
}

uint16_t
i40e_recv_scattered_pkts(void *rx_queue,
                         struct rte_mbuf **rx_pkts,
                         uint16_t nb_pkts)
{
        struct i40e_rx_queue *rxq = rx_queue;
        volatile union i40e_rx_desc *rx_ring = rxq->rx_ring;
        volatile union i40e_rx_desc *rxdp;
        union i40e_rx_desc rxd;
        struct i40e_rx_entry *sw_ring = rxq->sw_ring;
        struct i40e_rx_entry *rxe;
        struct rte_mbuf *first_seg = rxq->pkt_first_seg;
        struct rte_mbuf *last_seg = rxq->pkt_last_seg;
        struct rte_mbuf *nmb, *rxm;
        uint16_t rx_id = rxq->rx_tail;
        uint16_t nb_rx = 0, nb_hold = 0, rx_packet_len;
        struct rte_eth_dev *dev;
        uint32_t rx_status;
        uint64_t qword1;
        uint64_t dma_addr;
        uint64_t pkt_flags;
        uint32_t *ptype_tbl = rxq->vsi->adapter->ptype_tbl;

        while (nb_rx < nb_pkts) {
                rxdp = &rx_ring[rx_id];
                qword1 = rte_le_to_cpu_64(rxdp->wb.qword1.status_error_len);
                rx_status = (qword1 & I40E_RXD_QW1_STATUS_MASK) >>
                                        I40E_RXD_QW1_STATUS_SHIFT;

                /* Check the DD bit */
                if (!(rx_status & (1 << I40E_RX_DESC_STATUS_DD_SHIFT)))
                        break;

                nmb = rte_mbuf_raw_alloc(rxq->mp);
                if (unlikely(!nmb)) {
                        dev = I40E_VSI_TO_ETH_DEV(rxq->vsi);
                        dev->data->rx_mbuf_alloc_failed++;
                        break;
                }

                rxd = *rxdp;
                nb_hold++;
                rxe = &sw_ring[rx_id];
                rx_id++;
                if (rx_id == rxq->nb_rx_desc)
                        rx_id = 0;

                /* Prefetch next mbuf */
                rte_prefetch0(sw_ring[rx_id].mbuf);

                /**
                 * When next RX descriptor is on a cache line boundary,
                 * prefetch the next 4 RX descriptors and next 8 pointers
                 * to mbufs.
                 */
                if ((rx_id & 0x3) == 0) {
                        rte_prefetch0(&rx_ring[rx_id]);
                        rte_prefetch0(&sw_ring[rx_id]);
                }

                rxm = rxe->mbuf;
                rxe->mbuf = nmb;
                dma_addr =
                        rte_cpu_to_le_64(rte_mbuf_data_iova_default(nmb));

                /* Set data buffer address and data length of the mbuf */
                rxdp->read.hdr_addr = 0;
                rxdp->read.pkt_addr = dma_addr;
                rx_packet_len = (qword1 & I40E_RXD_QW1_LENGTH_PBUF_MASK) >>
                                        I40E_RXD_QW1_LENGTH_PBUF_SHIFT;
                rxm->data_len = rx_packet_len;
                rxm->data_off = RTE_PKTMBUF_HEADROOM;

                /**
                 * If this is the first buffer of the received packet, set the
                 * pointer to the first mbuf of the packet and initialize its
                 * context. Otherwise, update the total length and the number
                 * of segments of the current scattered packet, and update the
                 * pointer to the last mbuf of the current packet.
                 */
                if (!first_seg) {
                        first_seg = rxm;
                        first_seg->nb_segs = 1;
                        first_seg->pkt_len = rx_packet_len;
                } else {
                        first_seg->pkt_len =
                                (uint16_t)(first_seg->pkt_len +
                                                rx_packet_len);
                        first_seg->nb_segs++;
                        last_seg->next = rxm;
                }

                /**
                 * If this is not the last buffer of the received packet,
                 * update the pointer to the last mbuf of the current scattered
                 * packet and continue to parse the RX ring.
                 */
                if (!(rx_status & (1 << I40E_RX_DESC_STATUS_EOF_SHIFT))) {
                        last_seg = rxm;
                        continue;
                }

                /**
                 * This is the last buffer of the received packet. If the CRC
                 * is not stripped by the hardware:
                 *  - Subtract the CRC length from the total packet length.
                 *  - If the last buffer only contains the whole CRC or a part
                 *  of it, free the mbuf associated to the last buffer. If part
                 *  of the CRC is also contained in the previous mbuf, subtract
                 *  the length of that CRC part from the data length of the
                 *  previous mbuf.
                 */
                rxm->next = NULL;
                if (unlikely(rxq->crc_len > 0)) {
                        first_seg->pkt_len -= RTE_ETHER_CRC_LEN;
                        if (rx_packet_len <= RTE_ETHER_CRC_LEN) {
                                rte_pktmbuf_free_seg(rxm);
                                first_seg->nb_segs--;
                                last_seg->data_len =
                                        (uint16_t)(last_seg->data_len -
                                        (RTE_ETHER_CRC_LEN - rx_packet_len));
                                last_seg->next = NULL;
                        } else
                                rxm->data_len = (uint16_t)(rx_packet_len -
                                                        RTE_ETHER_CRC_LEN);
                }

                first_seg->port = rxq->port_id;
                first_seg->ol_flags = 0;
                i40e_rxd_to_vlan_tci(first_seg, &rxd);
                pkt_flags = i40e_rxd_status_to_pkt_flags(qword1);
                pkt_flags |= i40e_rxd_error_to_pkt_flags(qword1);
                first_seg->packet_type =
                        ptype_tbl[(uint8_t)((qword1 &
                        I40E_RXD_QW1_PTYPE_MASK) >> I40E_RXD_QW1_PTYPE_SHIFT)];
                if (pkt_flags & PKT_RX_RSS_HASH)
                        first_seg->hash.rss =
                                rte_le_to_cpu_32(rxd.wb.qword0.hi_dword.rss);
                if (pkt_flags & PKT_RX_FDIR)
                        pkt_flags |= i40e_rxd_build_fdir(&rxd, first_seg);

#ifdef RTE_LIBRTE_IEEE1588
                pkt_flags |= i40e_get_iee15888_flags(first_seg, qword1);
#endif
                first_seg->ol_flags |= pkt_flags;

                /* Prefetch data of first segment, if configured to do so. */
                rte_prefetch0(RTE_PTR_ADD(first_seg->buf_addr,
                        first_seg->data_off));
                rx_pkts[nb_rx++] = first_seg;
                first_seg = NULL;
        }

        /* Record index of the next RX descriptor to probe. */
        rxq->rx_tail = rx_id;
        rxq->pkt_first_seg = first_seg;
        rxq->pkt_last_seg = last_seg;

        /**
         * If the number of free RX descriptors is greater than the RX free
         * threshold of the queue, advance the Receive Descriptor Tail (RDT)
         * register. Update the RDT with the value of the last processed RX
         * descriptor minus 1, to guarantee that the RDT register is never
         * equal to the RDH register, which creates a "full" ring situtation
         * from the hardware point of view.
         */
        nb_hold = (uint16_t)(nb_hold + rxq->nb_rx_hold);
        if (nb_hold > rxq->rx_free_thresh) {
                rx_id = (uint16_t)(rx_id == 0 ?
                        (rxq->nb_rx_desc - 1) : (rx_id - 1));
                I40E_PCI_REG_WC_WRITE(rxq->qrx_tail, rx_id);
                nb_hold = 0;
        }
        rxq->nb_rx_hold = nb_hold;

        return nb_rx;

}

/* Check if the context descriptor is needed for TX offloading */
static inline uint16_t
i40e_calc_context_desc(uint64_t flags)
{
        static uint64_t mask = PKT_TX_OUTER_IP_CKSUM |
                PKT_TX_TCP_SEG |
                PKT_TX_QINQ_PKT |
                PKT_TX_TUNNEL_MASK;

#ifdef RTE_LIBRTE_IEEE1588
        mask |= PKT_TX_IEEE1588_TMST;
#endif

        return (flags & mask) ? 1 : 0;
}

/* set i40e TSO context descriptor */
static inline uint64_t
i40e_set_tso_ctx(struct rte_mbuf *mbuf, union i40e_tx_offload tx_offload)
{
        uint64_t ctx_desc = 0;
        uint32_t cd_cmd, hdr_len, cd_tso_len;

        if (!tx_offload.l4_len) {
                PMD_DRV_LOG(DEBUG, "L4 length set to 0");
                return ctx_desc;
        }

        hdr_len = tx_offload.l2_len + tx_offload.l3_len + tx_offload.l4_len;
        hdr_len += (mbuf->ol_flags & PKT_TX_TUNNEL_MASK) ?
                   tx_offload.outer_l2_len + tx_offload.outer_l3_len : 0;

        cd_cmd = I40E_TX_CTX_DESC_TSO;
        cd_tso_len = mbuf->pkt_len - hdr_len;
        ctx_desc |= ((uint64_t)cd_cmd << I40E_TXD_CTX_QW1_CMD_SHIFT) |
                ((uint64_t)cd_tso_len <<
                 I40E_TXD_CTX_QW1_TSO_LEN_SHIFT) |
                ((uint64_t)mbuf->tso_segsz <<
                 I40E_TXD_CTX_QW1_MSS_SHIFT);

        return ctx_desc;
}

/* HW requires that Tx buffer size ranges from 1B up to (16K-1)B. */
#define I40E_MAX_DATA_PER_TXD \
        (I40E_TXD_QW1_TX_BUF_SZ_MASK >> I40E_TXD_QW1_TX_BUF_SZ_SHIFT)
/* Calculate the number of TX descriptors needed for each pkt */
static inline uint16_t
i40e_calc_pkt_desc(struct rte_mbuf *tx_pkt)
{
        struct rte_mbuf *txd = tx_pkt;
        uint16_t count = 0;

        while (txd != NULL) {
                count += DIV_ROUND_UP(txd->data_len, I40E_MAX_DATA_PER_TXD);
                txd = txd->next;
        }

        return count;
}

uint16_t
i40e_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts, uint16_t nb_pkts)
{
        struct i40e_tx_queue *txq;
        struct i40e_tx_entry *sw_ring;
        struct i40e_tx_entry *txe, *txn;
        volatile struct i40e_tx_desc *txd;
        volatile struct i40e_tx_desc *txr;
        struct rte_mbuf *tx_pkt;
        struct rte_mbuf *m_seg;
        uint32_t cd_tunneling_params;
        uint16_t tx_id;
        uint16_t nb_tx;
        uint32_t td_cmd;
        uint32_t td_offset;
        uint32_t td_tag;
        uint64_t ol_flags;
        uint16_t nb_used;
        uint16_t nb_ctx;
        uint16_t tx_last;
        uint16_t slen;
        uint64_t buf_dma_addr;
        union i40e_tx_offload tx_offload = {0};

        txq = tx_queue;
        sw_ring = txq->sw_ring;
        txr = txq->tx_ring;
        tx_id = txq->tx_tail;
        txe = &sw_ring[tx_id];

        /* Check if the descriptor ring needs to be cleaned. */
        if (txq->nb_tx_free < txq->tx_free_thresh)
                (void)i40e_xmit_cleanup(txq);

        for (nb_tx = 0; nb_tx < nb_pkts; nb_tx++) {
                td_cmd = 0;
                td_tag = 0;
                td_offset = 0;

                tx_pkt = *tx_pkts++;
                RTE_MBUF_PREFETCH_TO_FREE(txe->mbuf);

                ol_flags = tx_pkt->ol_flags;
                tx_offload.l2_len = tx_pkt->l2_len;
                tx_offload.l3_len = tx_pkt->l3_len;
                tx_offload.outer_l2_len = tx_pkt->outer_l2_len;
                tx_offload.outer_l3_len = tx_pkt->outer_l3_len;
                tx_offload.l4_len = tx_pkt->l4_len;
                tx_offload.tso_segsz = tx_pkt->tso_segsz;

                /* Calculate the number of context descriptors needed. */
                nb_ctx = i40e_calc_context_desc(ol_flags);

                /**
                 * The number of descriptors that must be allocated for
                 * a packet equals to the number of the segments of that
                 * packet plus 1 context descriptor if needed.
                 * Recalculate the needed tx descs when TSO enabled in case
                 * the mbuf data size exceeds max data size that hw allows
                 * per tx desc.
                 */
                if (ol_flags & PKT_TX_TCP_SEG)
                        nb_used = (uint16_t)(i40e_calc_pkt_desc(tx_pkt) +
                                             nb_ctx);
                else
                        nb_used = (uint16_t)(tx_pkt->nb_segs + nb_ctx);
                tx_last = (uint16_t)(tx_id + nb_used - 1);

                /* Circular ring */
                if (tx_last >= txq->nb_tx_desc)
                        tx_last = (uint16_t)(tx_last - txq->nb_tx_desc);

                if (nb_used > txq->nb_tx_free) {
                        if (i40e_xmit_cleanup(txq) != 0) {
                                if (nb_tx == 0)
                                        return 0;
                                goto end_of_tx;
                        }
                        if (unlikely(nb_used > txq->tx_rs_thresh)) {
                                while (nb_used > txq->nb_tx_free) {
                                        if (i40e_xmit_cleanup(txq) != 0) {
                                                if (nb_tx == 0)
                                                        return 0;
                                                goto end_of_tx;
                                        }
                                }
                        }
                }

                /* Descriptor based VLAN insertion */
                if (ol_flags & (PKT_TX_VLAN_PKT | PKT_TX_QINQ_PKT)) {
                        td_cmd |= I40E_TX_DESC_CMD_IL2TAG1;
                        td_tag = tx_pkt->vlan_tci;
                }

                /* Always enable CRC offload insertion */
                td_cmd |= I40E_TX_DESC_CMD_ICRC;

                /* Fill in tunneling parameters if necessary */
                cd_tunneling_params = 0;
                if (ol_flags & PKT_TX_TUNNEL_MASK)
                        i40e_parse_tunneling_params(ol_flags, tx_offload,
                                                    &cd_tunneling_params);
                /* Enable checksum offloading */
                if (ol_flags & I40E_TX_CKSUM_OFFLOAD_MASK)
                        i40e_txd_enable_checksum(ol_flags, &td_cmd,
                                                 &td_offset, tx_offload);

                if (nb_ctx) {
                        /* Setup TX context descriptor if required */
                        volatile struct i40e_tx_context_desc *ctx_txd =
                                (volatile struct i40e_tx_context_desc *)\
                                                        &txr[tx_id];
                        uint16_t cd_l2tag2 = 0;
                        uint64_t cd_type_cmd_tso_mss =
                                I40E_TX_DESC_DTYPE_CONTEXT;

                        txn = &sw_ring[txe->next_id];
                        RTE_MBUF_PREFETCH_TO_FREE(txn->mbuf);
                        if (txe->mbuf != NULL) {
                                rte_pktmbuf_free_seg(txe->mbuf);
                                txe->mbuf = NULL;
                        }

                        /* TSO enabled means no timestamp */
                        if (ol_flags & PKT_TX_TCP_SEG)
                                cd_type_cmd_tso_mss |=
                                        i40e_set_tso_ctx(tx_pkt, tx_offload);
                        else {
#ifdef RTE_LIBRTE_IEEE1588
                                if (ol_flags & PKT_TX_IEEE1588_TMST)
                                        cd_type_cmd_tso_mss |=
                                                ((uint64_t)I40E_TX_CTX_DESC_TSYN <<
                                                 I40E_TXD_CTX_QW1_CMD_SHIFT);
#endif
                        }

                        ctx_txd->tunneling_params =
                                rte_cpu_to_le_32(cd_tunneling_params);
                        if (ol_flags & PKT_TX_QINQ_PKT) {
                                cd_l2tag2 = tx_pkt->vlan_tci_outer;
                                cd_type_cmd_tso_mss |=
                                        ((uint64_t)I40E_TX_CTX_DESC_IL2TAG2 <<
                                                I40E_TXD_CTX_QW1_CMD_SHIFT);
                        }
                        ctx_txd->l2tag2 = rte_cpu_to_le_16(cd_l2tag2);
                        ctx_txd->type_cmd_tso_mss =
                                rte_cpu_to_le_64(cd_type_cmd_tso_mss);

                        PMD_TX_LOG(DEBUG, "mbuf: %p, TCD[%u]:\n"
                                "tunneling_params: %#x;\n"
                                "l2tag2: %#hx;\n"
                                "rsvd: %#hx;\n"
                                "type_cmd_tso_mss: %#"PRIx64";\n",
                                tx_pkt, tx_id,
                                ctx_txd->tunneling_params,
                                ctx_txd->l2tag2,
                                ctx_txd->rsvd,
                                ctx_txd->type_cmd_tso_mss);

                        txe->last_id = tx_last;
                        tx_id = txe->next_id;
                        txe = txn;
                }

                m_seg = tx_pkt;
                do {
                        txd = &txr[tx_id];
                        txn = &sw_ring[txe->next_id];

                        if (txe->mbuf)
                                rte_pktmbuf_free_seg(txe->mbuf);
                        txe->mbuf = m_seg;

                        /* Setup TX Descriptor */
                        slen = m_seg->data_len;
                        buf_dma_addr = rte_mbuf_data_iova(m_seg);

                        while ((ol_flags & PKT_TX_TCP_SEG) &&
                                unlikely(slen > I40E_MAX_DATA_PER_TXD)) {
                                txd->buffer_addr =
                                        rte_cpu_to_le_64(buf_dma_addr);
                                txd->cmd_type_offset_bsz =
                                        i40e_build_ctob(td_cmd,
                                        td_offset, I40E_MAX_DATA_PER_TXD,
                                        td_tag);

                                buf_dma_addr += I40E_MAX_DATA_PER_TXD;
                                slen -= I40E_MAX_DATA_PER_TXD;

                                txe->last_id = tx_last;
                                tx_id = txe->next_id;
                                txe = txn;
                                txd = &txr[tx_id];
                                txn = &sw_ring[txe->next_id];
                        }
                        PMD_TX_LOG(DEBUG, "mbuf: %p, TDD[%u]:\n"
                                "buf_dma_addr: %#"PRIx64";\n"
                                "td_cmd: %#x;\n"
                                "td_offset: %#x;\n"
                                "td_len: %u;\n"
                                "td_tag: %#x;\n",
                                tx_pkt, tx_id, buf_dma_addr,
                                td_cmd, td_offset, slen, td_tag);

                        txd->buffer_addr = rte_cpu_to_le_64(buf_dma_addr);
                        txd->cmd_type_offset_bsz = i40e_build_ctob(td_cmd,
                                                td_offset, slen, td_tag);
                        txe->last_id = tx_last;
                        tx_id = txe->next_id;
                        txe = txn;
                        m_seg = m_seg->next;
                } while (m_seg != NULL);

                /* The last packet data descriptor needs End Of Packet (EOP) */
                td_cmd |= I40E_TX_DESC_CMD_EOP;
                txq->nb_tx_used = (uint16_t)(txq->nb_tx_used + nb_used);
                txq->nb_tx_free = (uint16_t)(txq->nb_tx_free - nb_used);

                if (txq->nb_tx_used >= txq->tx_rs_thresh) {
                        PMD_TX_LOG(DEBUG,
                                   "Setting RS bit on TXD id="
                                   "%4u (port=%d queue=%d)",
                                   tx_last, txq->port_id, txq->queue_id);

                        td_cmd |= I40E_TX_DESC_CMD_RS;

                        /* Update txq RS bit counters */
                        txq->nb_tx_used = 0;
                }

                txd->cmd_type_offset_bsz |=
                        rte_cpu_to_le_64(((uint64_t)td_cmd) <<
                                        I40E_TXD_QW1_CMD_SHIFT);
        }

end_of_tx:
        PMD_TX_LOG(DEBUG, "port_id=%u queue_id=%u tx_tail=%u nb_tx=%u",
                   (unsigned) txq->port_id, (unsigned) txq->queue_id,
                   (unsigned) tx_id, (unsigned) nb_tx);

        rte_io_wmb();
        I40E_PCI_REG_WC_WRITE_RELAXED(txq->qtx_tail, tx_id);
        txq->tx_tail = tx_id;

        return nb_tx;
}

static __rte_always_inline int
i40e_tx_free_bufs(struct i40e_tx_queue *txq)
{
        struct i40e_tx_entry *txep;
        uint16_t tx_rs_thresh = txq->tx_rs_thresh;
        uint16_t i = 0, j = 0;
        struct rte_mbuf *free[RTE_I40E_TX_MAX_FREE_BUF_SZ];
        const uint16_t k = RTE_ALIGN_FLOOR(tx_rs_thresh, RTE_I40E_TX_MAX_FREE_BUF_SZ);
        const uint16_t m = tx_rs_thresh % RTE_I40E_TX_MAX_FREE_BUF_SZ;

        if ((txq->tx_ring[txq->tx_next_dd].cmd_type_offset_bsz &
                        rte_cpu_to_le_64(I40E_TXD_QW1_DTYPE_MASK)) !=
                        rte_cpu_to_le_64(I40E_TX_DESC_DTYPE_DESC_DONE))
                return 0;

        txep = &txq->sw_ring[txq->tx_next_dd - (tx_rs_thresh - 1)];

        for (i = 0; i < tx_rs_thresh; i++)
                rte_prefetch0((txep + i)->mbuf);

        if (txq->offloads & DEV_TX_OFFLOAD_MBUF_FAST_FREE) {
                if (k) {
                        for (j = 0; j != k; j += RTE_I40E_TX_MAX_FREE_BUF_SZ) {
                                for (i = 0; i < RTE_I40E_TX_MAX_FREE_BUF_SZ; ++i, ++txep) {
                                        free[i] = txep->mbuf;
                                        txep->mbuf = NULL;
                                }
                                rte_mempool_put_bulk(free[0]->pool, (void **)free,
                                                RTE_I40E_TX_MAX_FREE_BUF_SZ);
                        }
                }

                if (m) {
                        for (i = 0; i < m; ++i, ++txep) {
                                free[i] = txep->mbuf;
                                txep->mbuf = NULL;
                        }
                        rte_mempool_put_bulk(free[0]->pool, (void **)free, m);
                }
        } else {
                for (i = 0; i < txq->tx_rs_thresh; ++i, ++txep) {
                        rte_pktmbuf_free_seg(txep->mbuf);
                        txep->mbuf = NULL;
                }
        }

        txq->nb_tx_free = (uint16_t)(txq->nb_tx_free + txq->tx_rs_thresh);
        txq->tx_next_dd = (uint16_t)(txq->tx_next_dd + txq->tx_rs_thresh);
        if (txq->tx_next_dd >= txq->nb_tx_desc)
                txq->tx_next_dd = (uint16_t)(txq->tx_rs_thresh - 1);

        return txq->tx_rs_thresh;
}

/* Populate 4 descriptors with data from 4 mbufs */
static inline void
tx4(volatile struct i40e_tx_desc *txdp, struct rte_mbuf **pkts)
{
        uint64_t dma_addr;
        uint32_t i;

        for (i = 0; i < 4; i++, txdp++, pkts++) {
                dma_addr = rte_mbuf_data_iova(*pkts);
                txdp->buffer_addr = rte_cpu_to_le_64(dma_addr);
                txdp->cmd_type_offset_bsz =
                        i40e_build_ctob((uint32_t)I40E_TD_CMD, 0,
                                        (*pkts)->data_len, 0);
        }
}

/* Populate 1 descriptor with data from 1 mbuf */
static inline void
tx1(volatile struct i40e_tx_desc *txdp, struct rte_mbuf **pkts)
{
        uint64_t dma_addr;

        dma_addr = rte_mbuf_data_iova(*pkts);
        txdp->buffer_addr = rte_cpu_to_le_64(dma_addr);
        txdp->cmd_type_offset_bsz =
                i40e_build_ctob((uint32_t)I40E_TD_CMD, 0,
                                (*pkts)->data_len, 0);
}

/* Fill hardware descriptor ring with mbuf data */
static inline void
i40e_tx_fill_hw_ring(struct i40e_tx_queue *txq,
                     struct rte_mbuf **pkts,
                     uint16_t nb_pkts)
{
        volatile struct i40e_tx_desc *txdp = &(txq->tx_ring[txq->tx_tail]);
        struct i40e_tx_entry *txep = &(txq->sw_ring[txq->tx_tail]);
        const int N_PER_LOOP = 4;
        const int N_PER_LOOP_MASK = N_PER_LOOP - 1;
        int mainpart, leftover;
        int i, j;

        mainpart = (nb_pkts & ((uint32_t) ~N_PER_LOOP_MASK));
        leftover = (nb_pkts & ((uint32_t)  N_PER_LOOP_MASK));
        for (i = 0; i < mainpart; i += N_PER_LOOP) {
                for (j = 0; j < N_PER_LOOP; ++j) {
                        (txep + i + j)->mbuf = *(pkts + i + j);
                }
                tx4(txdp + i, pkts + i);
        }
        if (unlikely(leftover > 0)) {
                for (i = 0; i < leftover; ++i) {
                        (txep + mainpart + i)->mbuf = *(pkts + mainpart + i);
                        tx1(txdp + mainpart + i, pkts + mainpart + i);
                }
        }
}

static inline uint16_t
tx_xmit_pkts(struct i40e_tx_queue *txq,
             struct rte_mbuf **tx_pkts,
             uint16_t nb_pkts)
{
        volatile struct i40e_tx_desc *txr = txq->tx_ring;
        uint16_t n = 0;

        /**
         * Begin scanning the H/W ring for done descriptors when the number
         * of available descriptors drops below tx_free_thresh. For each done
         * descriptor, free the associated buffer.
         */
        if (txq->nb_tx_free < txq->tx_free_thresh)
                i40e_tx_free_bufs(txq);

        /* Use available descriptor only */
        nb_pkts = (uint16_t)RTE_MIN(txq->nb_tx_free, nb_pkts);
        if (unlikely(!nb_pkts))
                return 0;

        txq->nb_tx_free = (uint16_t)(txq->nb_tx_free - nb_pkts);
        if ((txq->tx_tail + nb_pkts) > txq->nb_tx_desc) {
                n = (uint16_t)(txq->nb_tx_desc - txq->tx_tail);
                i40e_tx_fill_hw_ring(txq, tx_pkts, n);
                txr[txq->tx_next_rs].cmd_type_offset_bsz |=
                        rte_cpu_to_le_64(((uint64_t)I40E_TX_DESC_CMD_RS) <<
                                                I40E_TXD_QW1_CMD_SHIFT);
                txq->tx_next_rs = (uint16_t)(txq->tx_rs_thresh - 1);
                txq->tx_tail = 0;
        }

        /* Fill hardware descriptor ring with mbuf data */
        i40e_tx_fill_hw_ring(txq, tx_pkts + n, (uint16_t)(nb_pkts - n));
        txq->tx_tail = (uint16_t)(txq->tx_tail + (nb_pkts - n));

        /* Determin if RS bit needs to be set */
        if (txq->tx_tail > txq->tx_next_rs) {
                txr[txq->tx_next_rs].cmd_type_offset_bsz |=
                        rte_cpu_to_le_64(((uint64_t)I40E_TX_DESC_CMD_RS) <<
                                                I40E_TXD_QW1_CMD_SHIFT);
                txq->tx_next_rs =
                        (uint16_t)(txq->tx_next_rs + txq->tx_rs_thresh);
                if (txq->tx_next_rs >= txq->nb_tx_desc)
                        txq->tx_next_rs = (uint16_t)(txq->tx_rs_thresh - 1);
        }

        if (txq->tx_tail >= txq->nb_tx_desc)
                txq->tx_tail = 0;

        /* Update the tx tail register */
        I40E_PCI_REG_WC_WRITE(txq->qtx_tail, txq->tx_tail);

        return nb_pkts;
}

static uint16_t
i40e_xmit_pkts_simple(void *tx_queue,
                      struct rte_mbuf **tx_pkts,
                      uint16_t nb_pkts)
{
        uint16_t nb_tx = 0;

        if (likely(nb_pkts <= I40E_TX_MAX_BURST))
                return tx_xmit_pkts((struct i40e_tx_queue *)tx_queue,
                                                tx_pkts, nb_pkts);

        while (nb_pkts) {
                uint16_t ret, num = (uint16_t)RTE_MIN(nb_pkts,
                                                I40E_TX_MAX_BURST);

                ret = tx_xmit_pkts((struct i40e_tx_queue *)tx_queue,
                                                &tx_pkts[nb_tx], num);
                nb_tx = (uint16_t)(nb_tx + ret);
                nb_pkts = (uint16_t)(nb_pkts - ret);
                if (ret < num)
                        break;
        }

        return nb_tx;
}

static uint16_t
i40e_xmit_pkts_vec(void *tx_queue, struct rte_mbuf **tx_pkts,
                   uint16_t nb_pkts)
{
        uint16_t nb_tx = 0;
        struct i40e_tx_queue *txq = (struct i40e_tx_queue *)tx_queue;

        while (nb_pkts) {
                uint16_t ret, num;

                num = (uint16_t)RTE_MIN(nb_pkts, txq->tx_rs_thresh);
                ret = i40e_xmit_fixed_burst_vec(tx_queue, &tx_pkts[nb_tx],
                                                num);
                nb_tx += ret;
                nb_pkts -= ret;
                if (ret < num)
                        break;
        }

        return nb_tx;
}

/*********************************************************************
 *
 *  TX simple prep functions
 *
 **********************************************************************/
uint16_t
i40e_simple_prep_pkts(__rte_unused void *tx_queue, struct rte_mbuf **tx_pkts,
                      uint16_t nb_pkts)
{
        int i;
        uint64_t ol_flags;
        struct rte_mbuf *m;

        for (i = 0; i < nb_pkts; i++) {
                m = tx_pkts[i];
                ol_flags = m->ol_flags;

                if (m->nb_segs != 1) {
                        rte_errno = EINVAL;
                        return i;
                }

                if (ol_flags & I40E_TX_OFFLOAD_SIMPLE_NOTSUP_MASK) {
                        rte_errno = ENOTSUP;
                        return i;
                }

                /* check the size of packet */
                if (m->pkt_len < I40E_TX_MIN_PKT_LEN ||
                    m->pkt_len > I40E_FRAME_SIZE_MAX) {
                        rte_errno = EINVAL;
                        return i;
                }
        }
        return i;
}

/*********************************************************************
 *
 *  TX prep functions
 *
 **********************************************************************/
uint16_t
i40e_prep_pkts(__rte_unused void *tx_queue, struct rte_mbuf **tx_pkts,
                uint16_t nb_pkts)
{
        int i, ret;
        uint64_t ol_flags;
        struct rte_mbuf *m;

        for (i = 0; i < nb_pkts; i++) {
                m = tx_pkts[i];
                ol_flags = m->ol_flags;

                /* Check for m->nb_segs to not exceed the limits. */
                if (!(ol_flags & PKT_TX_TCP_SEG)) {
                        if (m->nb_segs > I40E_TX_MAX_MTU_SEG ||
                            m->pkt_len > I40E_FRAME_SIZE_MAX) {
                                rte_errno = EINVAL;
                                return i;
                        }
                } else if (m->nb_segs > I40E_TX_MAX_SEG ||
                           m->tso_segsz < I40E_MIN_TSO_MSS ||
                           m->tso_segsz > I40E_MAX_TSO_MSS ||
                           m->pkt_len > I40E_TSO_FRAME_SIZE_MAX) {
                        /* MSS outside the range (256B - 9674B) are considered
                         * malicious
                         */
                        rte_errno = EINVAL;
                        return i;
                }

                if (ol_flags & I40E_TX_OFFLOAD_NOTSUP_MASK) {
                        rte_errno = ENOTSUP;
                        return i;
                }

                /* check the size of packet */
                if (m->pkt_len < I40E_TX_MIN_PKT_LEN) {
                        rte_errno = EINVAL;
                        return i;
                }

#ifdef RTE_ETHDEV_DEBUG_TX
                ret = rte_validate_tx_offload(m);
                if (ret != 0) {
                        rte_errno = -ret;
                        return i;
                }
#endif
                ret = rte_net_intel_cksum_prepare(m);
                if (ret != 0) {
                        rte_errno = -ret;
                        return i;
                }
        }
        return i;
}

/*
 * Find the VSI the queue belongs to. 'queue_idx' is the queue index
 * application used, which assume having sequential ones. But from driver's
 * perspective, it's different. For example, q0 belongs to FDIR VSI, q1-q64
 * to MAIN VSI, , q65-96 to SRIOV VSIs, q97-128 to VMDQ VSIs. For application
 * running on host, q1-64 and q97-128 can be used, total 96 queues. They can
 * use queue_idx from 0 to 95 to access queues, while real queue would be
 * different. This function will do a queue mapping to find VSI the queue
 * belongs to.
 */
static struct i40e_vsi*
i40e_pf_get_vsi_by_qindex(struct i40e_pf *pf, uint16_t queue_idx)
{
        /* the queue in MAIN VSI range */
        if (queue_idx < pf->main_vsi->nb_qps)
                return pf->main_vsi;

        queue_idx -= pf->main_vsi->nb_qps;

        /* queue_idx is greater than VMDQ VSIs range */
        if (queue_idx > pf->nb_cfg_vmdq_vsi * pf->vmdq_nb_qps - 1) {
                PMD_INIT_LOG(ERR, "queue_idx out of range. VMDQ configured?");
                return NULL;
        }

        return pf->vmdq[queue_idx / pf->vmdq_nb_qps].vsi;
}

static uint16_t
i40e_get_queue_offset_by_qindex(struct i40e_pf *pf, uint16_t queue_idx)
{
        /* the queue in MAIN VSI range */
        if (queue_idx < pf->main_vsi->nb_qps)
                return queue_idx;

        /* It's VMDQ queues */
        queue_idx -= pf->main_vsi->nb_qps;

        if (pf->nb_cfg_vmdq_vsi)
                return queue_idx % pf->vmdq_nb_qps;
        else {
                PMD_INIT_LOG(ERR, "Fail to get queue offset");
                return (uint16_t)(-1);
        }
}

int
i40e_dev_rx_queue_start(struct rte_eth_dev *dev, uint16_t rx_queue_id)
{
        struct i40e_rx_queue *rxq;
        int err;
        struct i40e_hw *hw = I40E_DEV_PRIVATE_TO_HW(dev->data->dev_private);

        PMD_INIT_FUNC_TRACE();

        rxq = dev->data->rx_queues[rx_queue_id];
        if (!rxq || !rxq->q_set) {
                PMD_DRV_LOG(ERR, "RX queue %u not available or setup",
                            rx_queue_id);
                return -EINVAL;
        }

        if (rxq->rx_deferred_start)
                PMD_DRV_LOG(WARNING, "RX queue %u is deferrd start",
                            rx_queue_id);

        err = i40e_alloc_rx_queue_mbufs(rxq);
        if (err) {
                PMD_DRV_LOG(ERR, "Failed to allocate RX queue mbuf");
                return err;
        }

        /* Init the RX tail regieter. */
        I40E_PCI_REG_WRITE(rxq->qrx_tail, rxq->nb_rx_desc - 1);

        err = i40e_switch_rx_queue(hw, rxq->reg_idx, TRUE);
        if (err) {
                PMD_DRV_LOG(ERR, "Failed to switch RX queue %u on",
                            rx_queue_id);

                i40e_rx_queue_release_mbufs(rxq);
                i40e_reset_rx_queue(rxq);
                return err;
        }
        dev->data->rx_queue_state[rx_queue_id] = RTE_ETH_QUEUE_STATE_STARTED;

        return 0;
}

int
i40e_dev_rx_queue_stop(struct rte_eth_dev *dev, uint16_t rx_queue_id)
{
        struct i40e_rx_queue *rxq;
        int err;
        struct i40e_hw *hw = I40E_DEV_PRIVATE_TO_HW(dev->data->dev_private);

        rxq = dev->data->rx_queues[rx_queue_id];
        if (!rxq || !rxq->q_set) {
                PMD_DRV_LOG(ERR, "RX queue %u not available or setup",
                                rx_queue_id);
                return -EINVAL;
        }

        /*
         * rx_queue_id is queue id application refers to, while
         * rxq->reg_idx is the real queue index.
         */
        err = i40e_switch_rx_queue(hw, rxq->reg_idx, FALSE);
        if (err) {
                PMD_DRV_LOG(ERR, "Failed to switch RX queue %u off",
                            rx_queue_id);
                return err;
        }
        i40e_rx_queue_release_mbufs(rxq);
        i40e_reset_rx_queue(rxq);
        dev->data->rx_queue_state[rx_queue_id] = RTE_ETH_QUEUE_STATE_STOPPED;

        return 0;
}

int
i40e_dev_tx_queue_start(struct rte_eth_dev *dev, uint16_t tx_queue_id)
{
        int err;
        struct i40e_tx_queue *txq;
        struct i40e_hw *hw = I40E_DEV_PRIVATE_TO_HW(dev->data->dev_private);

        PMD_INIT_FUNC_TRACE();

        txq = dev->data->tx_queues[tx_queue_id];
        if (!txq || !txq->q_set) {
                PMD_DRV_LOG(ERR, "TX queue %u is not available or setup",
                            tx_queue_id);
                return -EINVAL;
        }

        if (txq->tx_deferred_start)
                PMD_DRV_LOG(WARNING, "TX queue %u is deferrd start",
                            tx_queue_id);

        /*
         * tx_queue_id is queue id application refers to, while
         * rxq->reg_idx is the real queue index.
         */
        err = i40e_switch_tx_queue(hw, txq->reg_idx, TRUE);
        if (err) {
                PMD_DRV_LOG(ERR, "Failed to switch TX queue %u on",
                            tx_queue_id);
                return err;
        }
        dev->data->tx_queue_state[tx_queue_id] = RTE_ETH_QUEUE_STATE_STARTED;

        return 0;
}

int
i40e_dev_tx_queue_stop(struct rte_eth_dev *dev, uint16_t tx_queue_id)
{
        struct i40e_tx_queue *txq;
        int err;
        struct i40e_hw *hw = I40E_DEV_PRIVATE_TO_HW(dev->data->dev_private);

        txq = dev->data->tx_queues[tx_queue_id];
        if (!txq || !txq->q_set) {
                PMD_DRV_LOG(ERR, "TX queue %u is not available or setup",
                        tx_queue_id);
                return -EINVAL;
        }

        /*
         * tx_queue_id is queue id application refers to, while
         * txq->reg_idx is the real queue index.
         */
        err = i40e_switch_tx_queue(hw, txq->reg_idx, FALSE);
        if (err) {
                PMD_DRV_LOG(ERR, "Failed to switch TX queue %u of",
                            tx_queue_id);
                return err;
        }

        i40e_tx_queue_release_mbufs(txq);
        i40e_reset_tx_queue(txq);
        dev->data->tx_queue_state[tx_queue_id] = RTE_ETH_QUEUE_STATE_STOPPED;

        return 0;
}

const uint32_t *
i40e_dev_supported_ptypes_get(struct rte_eth_dev *dev)
{
        static const uint32_t ptypes[] = {
                /* refers to i40e_rxd_pkt_type_mapping() */
                RTE_PTYPE_L2_ETHER,
                RTE_PTYPE_L2_ETHER_TIMESYNC,
                RTE_PTYPE_L2_ETHER_LLDP,
                RTE_PTYPE_L2_ETHER_ARP,
                RTE_PTYPE_L3_IPV4_EXT_UNKNOWN,
                RTE_PTYPE_L3_IPV6_EXT_UNKNOWN,
                RTE_PTYPE_L4_FRAG,
                RTE_PTYPE_L4_ICMP,
                RTE_PTYPE_L4_NONFRAG,
                RTE_PTYPE_L4_SCTP,
                RTE_PTYPE_L4_TCP,
                RTE_PTYPE_L4_UDP,
                RTE_PTYPE_TUNNEL_GRENAT,
                RTE_PTYPE_TUNNEL_IP,
                RTE_PTYPE_INNER_L2_ETHER,
                RTE_PTYPE_INNER_L2_ETHER_VLAN,
                RTE_PTYPE_INNER_L3_IPV4_EXT_UNKNOWN,
                RTE_PTYPE_INNER_L3_IPV6_EXT_UNKNOWN,
                RTE_PTYPE_INNER_L4_FRAG,
                RTE_PTYPE_INNER_L4_ICMP,
                RTE_PTYPE_INNER_L4_NONFRAG,
                RTE_PTYPE_INNER_L4_SCTP,
                RTE_PTYPE_INNER_L4_TCP,
                RTE_PTYPE_INNER_L4_UDP,
                RTE_PTYPE_UNKNOWN
        };

        if (dev->rx_pkt_burst == i40e_recv_pkts ||
#ifdef RTE_LIBRTE_I40E_RX_ALLOW_BULK_ALLOC
            dev->rx_pkt_burst == i40e_recv_pkts_bulk_alloc ||
#endif
            dev->rx_pkt_burst == i40e_recv_scattered_pkts ||
            dev->rx_pkt_burst == i40e_recv_scattered_pkts_vec ||
            dev->rx_pkt_burst == i40e_recv_pkts_vec ||
#ifdef CC_AVX512_SUPPORT
            dev->rx_pkt_burst == i40e_recv_scattered_pkts_vec_avx512 ||
            dev->rx_pkt_burst == i40e_recv_pkts_vec_avx512 ||
#endif
            dev->rx_pkt_burst == i40e_recv_scattered_pkts_vec_avx2 ||
            dev->rx_pkt_burst == i40e_recv_pkts_vec_avx2)
                return ptypes;
        return NULL;
}

static int
i40e_dev_first_queue(uint16_t idx, void **queues, int num)
{
        uint16_t i;

        for (i = 0; i < num; i++) {
                if (i != idx && queues[i])
                        return 0;
        }

        return 1;
}

static int
i40e_dev_rx_queue_setup_runtime(struct rte_eth_dev *dev,
                                struct i40e_rx_queue *rxq)
{
        struct i40e_adapter *ad =
                I40E_DEV_PRIVATE_TO_ADAPTER(dev->data->dev_private);
        int use_def_burst_func =
                check_rx_burst_bulk_alloc_preconditions(rxq);
        uint16_t buf_size =
                (uint16_t)(rte_pktmbuf_data_room_size(rxq->mp) -
                           RTE_PKTMBUF_HEADROOM);
        int use_scattered_rx =
                (rxq->max_pkt_len > buf_size);

        if (i40e_rx_queue_init(rxq) != I40E_SUCCESS) {
                PMD_DRV_LOG(ERR,
                            "Failed to do RX queue initialization");
                return -EINVAL;
        }

        if (i40e_dev_first_queue(rxq->queue_id,
                                 dev->data->rx_queues,
                                 dev->data->nb_rx_queues)) {
                /**
                 * If it is the first queue to setup,
                 * set all flags to default and call
                 * i40e_set_rx_function.
                 */
                ad->rx_bulk_alloc_allowed = true;
                ad->rx_vec_allowed = true;
                dev->data->scattered_rx = use_scattered_rx;
                if (use_def_burst_func)
                        ad->rx_bulk_alloc_allowed = false;
                i40e_set_rx_function(dev);
                return 0;
        } else if (ad->rx_vec_allowed && !rte_is_power_of_2(rxq->nb_rx_desc)) {
                PMD_DRV_LOG(ERR, "Vector mode is allowed, but descriptor"
                            " number %d of queue %d isn't power of 2",
                            rxq->nb_rx_desc, rxq->queue_id);
                return -EINVAL;
        }

        /* check bulk alloc conflict */
        if (ad->rx_bulk_alloc_allowed && use_def_burst_func) {
                PMD_DRV_LOG(ERR, "Can't use default burst.");
                return -EINVAL;
        }
        /* check scatterred conflict */
        if (!dev->data->scattered_rx && use_scattered_rx) {
                PMD_DRV_LOG(ERR, "Scattered rx is required.");
                return -EINVAL;
        }
        /* check vector conflict */
        if (ad->rx_vec_allowed && i40e_rxq_vec_setup(rxq)) {
                PMD_DRV_LOG(ERR, "Failed vector rx setup.");
                return -EINVAL;
        }

        return 0;
}

int
i40e_dev_rx_queue_setup(struct rte_eth_dev *dev,
                        uint16_t queue_idx,
                        uint16_t nb_desc,
                        unsigned int socket_id,
                        const struct rte_eth_rxconf *rx_conf,
                        struct rte_mempool *mp)
{
        struct i40e_hw *hw = I40E_DEV_PRIVATE_TO_HW(dev->data->dev_private);
        struct i40e_adapter *ad =
                I40E_DEV_PRIVATE_TO_ADAPTER(dev->data->dev_private);
        struct i40e_vsi *vsi;
        struct i40e_pf *pf = NULL;
        struct i40e_vf *vf = NULL;
        struct i40e_rx_queue *rxq;
        const struct rte_memzone *rz;
        uint32_t ring_size;
        uint16_t len, i;
        uint16_t reg_idx, base, bsf, tc_mapping;
        int q_offset, use_def_burst_func = 1;
        uint64_t offloads;

        offloads = rx_conf->offloads | dev->data->dev_conf.rxmode.offloads;

        if (hw->mac.type == I40E_MAC_VF || hw->mac.type == I40E_MAC_X722_VF) {
                vf = I40EVF_DEV_PRIVATE_TO_VF(dev->data->dev_private);
                vsi = &vf->vsi;
                if (!vsi)
                        return -EINVAL;
                reg_idx = queue_idx;
        } else {
                pf = I40E_DEV_PRIVATE_TO_PF(dev->data->dev_private);
                vsi = i40e_pf_get_vsi_by_qindex(pf, queue_idx);
                if (!vsi)
                        return -EINVAL;
                q_offset = i40e_get_queue_offset_by_qindex(pf, queue_idx);
                if (q_offset < 0)
                        return -EINVAL;
                reg_idx = vsi->base_queue + q_offset;
        }

        if (nb_desc % I40E_ALIGN_RING_DESC != 0 ||
            (nb_desc > I40E_MAX_RING_DESC) ||
            (nb_desc < I40E_MIN_RING_DESC)) {
                PMD_DRV_LOG(ERR, "Number (%u) of receive descriptors is "
                            "invalid", nb_desc);
                return -EINVAL;
        }

        /* Free memory if needed */
        if (dev->data->rx_queues[queue_idx]) {
                i40e_dev_rx_queue_release(dev->data->rx_queues[queue_idx]);
                dev->data->rx_queues[queue_idx] = NULL;
        }

        /* Allocate the rx queue data structure */
        rxq = rte_zmalloc_socket("i40e rx queue",
                                 sizeof(struct i40e_rx_queue),
                                 RTE_CACHE_LINE_SIZE,
                                 socket_id);
        if (!rxq) {
                PMD_DRV_LOG(ERR, "Failed to allocate memory for "
                            "rx queue data structure");
                return -ENOMEM;

        }
        rxq->mp = mp;
        rxq->nb_rx_desc = nb_desc;
        rxq->rx_free_thresh = rx_conf->rx_free_thresh;
        rxq->queue_id = queue_idx;
        rxq->reg_idx = reg_idx;
        rxq->port_id = dev->data->port_id;
        if (dev->data->dev_conf.rxmode.offloads & DEV_RX_OFFLOAD_KEEP_CRC)
                rxq->crc_len = RTE_ETHER_CRC_LEN;
        else
                rxq->crc_len = 0;
        rxq->drop_en = rx_conf->rx_drop_en;
        rxq->vsi = vsi;
        rxq->rx_deferred_start = rx_conf->rx_deferred_start;
        rxq->offloads = offloads;

        /* Allocate the maximun number of RX ring hardware descriptor. */
        len = I40E_MAX_RING_DESC;

        /**
         * Allocating a little more memory because vectorized/bulk_alloc Rx
         * functions doesn't check boundaries each time.
         */
        len += RTE_PMD_I40E_RX_MAX_BURST;

        ring_size = RTE_ALIGN(len * sizeof(union i40e_rx_desc),
                              I40E_DMA_MEM_ALIGN);

        rz = rte_eth_dma_zone_reserve(dev, "rx_ring", queue_idx,
                              ring_size, I40E_RING_BASE_ALIGN, socket_id);
        if (!rz) {
                i40e_dev_rx_queue_release(rxq);
                PMD_DRV_LOG(ERR, "Failed to reserve DMA memory for RX");
                return -ENOMEM;
        }

        /* Zero all the descriptors in the ring. */
        memset(rz->addr, 0, ring_size);

        rxq->rx_ring_phys_addr = rz->iova;
        rxq->rx_ring = (union i40e_rx_desc *)rz->addr;

        len = (uint16_t)(nb_desc + RTE_PMD_I40E_RX_MAX_BURST);

        /* Allocate the software ring. */
        rxq->sw_ring =
                rte_zmalloc_socket("i40e rx sw ring",
                                   sizeof(struct i40e_rx_entry) * len,
                                   RTE_CACHE_LINE_SIZE,
                                   socket_id);
        if (!rxq->sw_ring) {
                i40e_dev_rx_queue_release(rxq);
                PMD_DRV_LOG(ERR, "Failed to allocate memory for SW ring");
                return -ENOMEM;
        }

        i40e_reset_rx_queue(rxq);
        rxq->q_set = TRUE;

        for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
                if (!(vsi->enabled_tc & (1 << i)))
                        continue;
                tc_mapping = rte_le_to_cpu_16(vsi->info.tc_mapping[i]);
                base = (tc_mapping & I40E_AQ_VSI_TC_QUE_OFFSET_MASK) >>
                        I40E_AQ_VSI_TC_QUE_OFFSET_SHIFT;
                bsf = (tc_mapping & I40E_AQ_VSI_TC_QUE_NUMBER_MASK) >>
                        I40E_AQ_VSI_TC_QUE_NUMBER_SHIFT;

                if (queue_idx >= base && queue_idx < (base + BIT(bsf)))
                        rxq->dcb_tc = i;
        }

        if (dev->data->dev_started) {
                if (i40e_dev_rx_queue_setup_runtime(dev, rxq)) {
                        i40e_dev_rx_queue_release(rxq);
                        return -EINVAL;
                }
        } else {
                use_def_burst_func =
                        check_rx_burst_bulk_alloc_preconditions(rxq);
                if (!use_def_burst_func) {
#ifdef RTE_LIBRTE_I40E_RX_ALLOW_BULK_ALLOC
                        PMD_INIT_LOG(DEBUG,
                          "Rx Burst Bulk Alloc Preconditions are "
                          "satisfied. Rx Burst Bulk Alloc function will be "
                          "used on port=%d, queue=%d.",
                          rxq->port_id, rxq->queue_id);
#endif /* RTE_LIBRTE_I40E_RX_ALLOW_BULK_ALLOC */
                } else {
                        PMD_INIT_LOG(DEBUG,
                          "Rx Burst Bulk Alloc Preconditions are "
                          "not satisfied, Scattered Rx is requested, "
                          "or RTE_LIBRTE_I40E_RX_ALLOW_BULK_ALLOC is "
                          "not enabled on port=%d, queue=%d.",
                          rxq->port_id, rxq->queue_id);
                        ad->rx_bulk_alloc_allowed = false;
                }
        }

        dev->data->rx_queues[queue_idx] = rxq;
        return 0;
}

void
i40e_dev_rx_queue_release(void *rxq)
{
        struct i40e_rx_queue *q = (struct i40e_rx_queue *)rxq;

        if (!q) {
                PMD_DRV_LOG(DEBUG, "Pointer to rxq is NULL");
                return;
        }

        i40e_rx_queue_release_mbufs(q);
        rte_free(q->sw_ring);
        rte_free(q);
}

uint32_t
i40e_dev_rx_queue_count(struct rte_eth_dev *dev, uint16_t rx_queue_id)
{
#define I40E_RXQ_SCAN_INTERVAL 4
        volatile union i40e_rx_desc *rxdp;
        struct i40e_rx_queue *rxq;
        uint16_t desc = 0;

        rxq = dev->data->rx_queues[rx_queue_id];
        rxdp = &(rxq->rx_ring[rxq->rx_tail]);
        while ((desc < rxq->nb_rx_desc) &&
                ((rte_le_to_cpu_64(rxdp->wb.qword1.status_error_len) &
                I40E_RXD_QW1_STATUS_MASK) >> I40E_RXD_QW1_STATUS_SHIFT) &
                                (1 << I40E_RX_DESC_STATUS_DD_SHIFT)) {
                /**
                 * Check the DD bit of a rx descriptor of each 4 in a group,
                 * to avoid checking too frequently and downgrading performance
                 * too much.
                 */
                desc += I40E_RXQ_SCAN_INTERVAL;
                rxdp += I40E_RXQ_SCAN_INTERVAL;
                if (rxq->rx_tail + desc >= rxq->nb_rx_desc)
                        rxdp = &(rxq->rx_ring[rxq->rx_tail +
                                        desc - rxq->nb_rx_desc]);
        }

        return desc;
}

int
i40e_dev_rx_descriptor_done(void *rx_queue, uint16_t offset)
{
        volatile union i40e_rx_desc *rxdp;
        struct i40e_rx_queue *rxq = rx_queue;
        uint16_t desc;
        int ret;

        if (unlikely(offset >= rxq->nb_rx_desc)) {
                PMD_DRV_LOG(ERR, "Invalid RX descriptor id %u", offset);
                return 0;
        }

        desc = rxq->rx_tail + offset;
        if (desc >= rxq->nb_rx_desc)
                desc -= rxq->nb_rx_desc;

        rxdp = &(rxq->rx_ring[desc]);

        ret = !!(((rte_le_to_cpu_64(rxdp->wb.qword1.status_error_len) &
                I40E_RXD_QW1_STATUS_MASK) >> I40E_RXD_QW1_STATUS_SHIFT) &
                                (1 << I40E_RX_DESC_STATUS_DD_SHIFT));

        return ret;
}

int
i40e_dev_rx_descriptor_status(void *rx_queue, uint16_t offset)
{
        struct i40e_rx_queue *rxq = rx_queue;
        volatile uint64_t *status;
        uint64_t mask;
        uint32_t desc;

        if (unlikely(offset >= rxq->nb_rx_desc))
                return -EINVAL;

        if (offset >= rxq->nb_rx_desc - rxq->nb_rx_hold)
                return RTE_ETH_RX_DESC_UNAVAIL;

        desc = rxq->rx_tail + offset;
        if (desc >= rxq->nb_rx_desc)
                desc -= rxq->nb_rx_desc;

        status = &rxq->rx_ring[desc].wb.qword1.status_error_len;
        mask = rte_le_to_cpu_64((1ULL << I40E_RX_DESC_STATUS_DD_SHIFT)
                << I40E_RXD_QW1_STATUS_SHIFT);
        if (*status & mask)
                return RTE_ETH_RX_DESC_DONE;

        return RTE_ETH_RX_DESC_AVAIL;
}

int
i40e_dev_tx_descriptor_status(void *tx_queue, uint16_t offset)
{
        struct i40e_tx_queue *txq = tx_queue;
        volatile uint64_t *status;
        uint64_t mask, expect;
        uint32_t desc;

        if (unlikely(offset >= txq->nb_tx_desc))
                return -EINVAL;

        desc = txq->tx_tail + offset;
        /* go to next desc that has the RS bit */
        desc = ((desc + txq->tx_rs_thresh - 1) / txq->tx_rs_thresh) *
                txq->tx_rs_thresh;
        if (desc >= txq->nb_tx_desc) {
                desc -= txq->nb_tx_desc;
                if (desc >= txq->nb_tx_desc)
                        desc -= txq->nb_tx_desc;
        }

        status = &txq->tx_ring[desc].cmd_type_offset_bsz;
        mask = rte_le_to_cpu_64(I40E_TXD_QW1_DTYPE_MASK);
        expect = rte_cpu_to_le_64(
                I40E_TX_DESC_DTYPE_DESC_DONE << I40E_TXD_QW1_DTYPE_SHIFT);
        if ((*status & mask) == expect)
                return RTE_ETH_TX_DESC_DONE;

        return RTE_ETH_TX_DESC_FULL;
}

static int
i40e_dev_tx_queue_setup_runtime(struct rte_eth_dev *dev,
                                struct i40e_tx_queue *txq)
{
        struct i40e_adapter *ad =
                I40E_DEV_PRIVATE_TO_ADAPTER(dev->data->dev_private);

        if (i40e_tx_queue_init(txq) != I40E_SUCCESS) {
                PMD_DRV_LOG(ERR,
                            "Failed to do TX queue initialization");
                return -EINVAL;
        }

        if (i40e_dev_first_queue(txq->queue_id,
                                 dev->data->tx_queues,
                                 dev->data->nb_tx_queues)) {
                /**
                 * If it is the first queue to setup,
                 * set all flags and call
                 * i40e_set_tx_function.
                 */
                i40e_set_tx_function_flag(dev, txq);
                i40e_set_tx_function(dev);
                return 0;
        }

        /* check vector conflict */
        if (ad->tx_vec_allowed) {
                if (txq->tx_rs_thresh > RTE_I40E_TX_MAX_FREE_BUF_SZ ||
                    i40e_txq_vec_setup(txq)) {
                        PMD_DRV_LOG(ERR, "Failed vector tx setup.");
                        return -EINVAL;
                }
        }
        /* check simple tx conflict */
        if (ad->tx_simple_allowed) {
                if ((txq->offloads & ~DEV_TX_OFFLOAD_MBUF_FAST_FREE) != 0 ||
                                txq->tx_rs_thresh < RTE_PMD_I40E_TX_MAX_BURST) {
                        PMD_DRV_LOG(ERR, "No-simple tx is required.");
                        return -EINVAL;
                }
        }

        return 0;
}

int
i40e_dev_tx_queue_setup(struct rte_eth_dev *dev,
                        uint16_t queue_idx,
                        uint16_t nb_desc,
                        unsigned int socket_id,
                        const struct rte_eth_txconf *tx_conf)
{
        struct i40e_hw *hw = I40E_DEV_PRIVATE_TO_HW(dev->data->dev_private);
        struct i40e_vsi *vsi;
        struct i40e_pf *pf = NULL;
        struct i40e_vf *vf = NULL;
        struct i40e_tx_queue *txq;
        const struct rte_memzone *tz;
        uint32_t ring_size;
        uint16_t tx_rs_thresh, tx_free_thresh;
        uint16_t reg_idx, i, base, bsf, tc_mapping;
        int q_offset;
        uint64_t offloads;

        offloads = tx_conf->offloads | dev->data->dev_conf.txmode.offloads;

        if (hw->mac.type == I40E_MAC_VF || hw->mac.type == I40E_MAC_X722_VF) {
                vf = I40EVF_DEV_PRIVATE_TO_VF(dev->data->dev_private);
                vsi = &vf->vsi;
                reg_idx = queue_idx;
        } else {
                pf = I40E_DEV_PRIVATE_TO_PF(dev->data->dev_private);
                vsi = i40e_pf_get_vsi_by_qindex(pf, queue_idx);
                if (!vsi)
                        return -EINVAL;
                q_offset = i40e_get_queue_offset_by_qindex(pf, queue_idx);
                if (q_offset < 0)
                        return -EINVAL;
                reg_idx = vsi->base_queue + q_offset;
        }

        if (nb_desc % I40E_ALIGN_RING_DESC != 0 ||
            (nb_desc > I40E_MAX_RING_DESC) ||
            (nb_desc < I40E_MIN_RING_DESC)) {
                PMD_DRV_LOG(ERR, "Number (%u) of transmit descriptors is "
                            "invalid", nb_desc);
                return -EINVAL;
        }

        /**
         * The following two parameters control the setting of the RS bit on
         * transmit descriptors. TX descriptors will have their RS bit set
         * after txq->tx_rs_thresh descriptors have been used. The TX
         * descriptor ring will be cleaned after txq->tx_free_thresh
         * descriptors are used or if the number of descriptors required to
         * transmit a packet is greater than the number of free TX descriptors.
         *
         * The following constraints must be satisfied:
         *  - tx_rs_thresh must be greater than 0.
         *  - tx_rs_thresh must be less than the size of the ring minus 2.
         *  - tx_rs_thresh must be less than or equal to tx_free_thresh.
         *  - tx_rs_thresh must be a divisor of the ring size.
         *  - tx_free_thresh must be greater than 0.
         *  - tx_free_thresh must be less than the size of the ring minus 3.
         *  - tx_free_thresh + tx_rs_thresh must not exceed nb_desc.
         *
         * One descriptor in the TX ring is used as a sentinel to avoid a H/W
         * race condition, hence the maximum threshold constraints. When set
         * to zero use default values.
         */
        tx_free_thresh = (uint16_t)((tx_conf->tx_free_thresh) ?
                tx_conf->tx_free_thresh : DEFAULT_TX_FREE_THRESH);
        /* force tx_rs_thresh to adapt an aggresive tx_free_thresh */
        tx_rs_thresh = (DEFAULT_TX_RS_THRESH + tx_free_thresh > nb_desc) ?
                nb_desc - tx_free_thresh : DEFAULT_TX_RS_THRESH;
        if (tx_conf->tx_rs_thresh > 0)
                tx_rs_thresh = tx_conf->tx_rs_thresh;
        if (tx_rs_thresh + tx_free_thresh > nb_desc) {
                PMD_INIT_LOG(ERR, "tx_rs_thresh + tx_free_thresh must not "
                                "exceed nb_desc. (tx_rs_thresh=%u "
                                "tx_free_thresh=%u nb_desc=%u port=%d queue=%d)",
                                (unsigned int)tx_rs_thresh,
                                (unsigned int)tx_free_thresh,
                                (unsigned int)nb_desc,
                                (int)dev->data->port_id,
                                (int)queue_idx);
                return I40E_ERR_PARAM;
        }
        if (tx_rs_thresh >= (nb_desc - 2)) {
                PMD_INIT_LOG(ERR, "tx_rs_thresh must be less than the "
                             "number of TX descriptors minus 2. "
                             "(tx_rs_thresh=%u port=%d queue=%d)",
                             (unsigned int)tx_rs_thresh,
                             (int)dev->data->port_id,
                             (int)queue_idx);
                return I40E_ERR_PARAM;
        }
        if (tx_free_thresh >= (nb_desc - 3)) {
                PMD_INIT_LOG(ERR, "tx_free_thresh must be less than the "
                             "number of TX descriptors minus 3. "
                             "(tx_free_thresh=%u port=%d queue=%d)",
                             (unsigned int)tx_free_thresh,
                             (int)dev->data->port_id,
                             (int)queue_idx);
                return I40E_ERR_PARAM;
        }
        if (tx_rs_thresh > tx_free_thresh) {
                PMD_INIT_LOG(ERR, "tx_rs_thresh must be less than or "
                             "equal to tx_free_thresh. (tx_free_thresh=%u"
                             " tx_rs_thresh=%u port=%d queue=%d)",
                             (unsigned int)tx_free_thresh,
                             (unsigned int)tx_rs_thresh,
                             (int)dev->data->port_id,
                             (int)queue_idx);
                return I40E_ERR_PARAM;
        }
        if ((nb_desc % tx_rs_thresh) != 0) {
                PMD_INIT_LOG(ERR, "tx_rs_thresh must be a divisor of the "
                             "number of TX descriptors. (tx_rs_thresh=%u"
                             " port=%d queue=%d)",
                             (unsigned int)tx_rs_thresh,
                             (int)dev->data->port_id,
                             (int)queue_idx);
                return I40E_ERR_PARAM;
        }
        if ((tx_rs_thresh > 1) && (tx_conf->tx_thresh.wthresh != 0)) {
                PMD_INIT_LOG(ERR, "TX WTHRESH must be set to 0 if "
                             "tx_rs_thresh is greater than 1. "
                             "(tx_rs_thresh=%u port=%d queue=%d)",
                             (unsigned int)tx_rs_thresh,
                             (int)dev->data->port_id,
                             (int)queue_idx);
                return I40E_ERR_PARAM;
        }

        /* Free memory if needed. */
        if (dev->data->tx_queues[queue_idx]) {
                i40e_dev_tx_queue_release(dev->data->tx_queues[queue_idx]);
                dev->data->tx_queues[queue_idx] = NULL;
        }

        /* Allocate the TX queue data structure. */
        txq = rte_zmalloc_socket("i40e tx queue",
                                  sizeof(struct i40e_tx_queue),
                                  RTE_CACHE_LINE_SIZE,
                                  socket_id);
        if (!txq) {
                PMD_DRV_LOG(ERR, "Failed to allocate memory for "
                            "tx queue structure");
                return -ENOMEM;
        }

        /* Allocate TX hardware ring descriptors. */
        ring_size = sizeof(struct i40e_tx_desc) * I40E_MAX_RING_DESC;
        ring_size = RTE_ALIGN(ring_size, I40E_DMA_MEM_ALIGN);
        tz = rte_eth_dma_zone_reserve(dev, "tx_ring", queue_idx,
                              ring_size, I40E_RING_BASE_ALIGN, socket_id);
        if (!tz) {
                i40e_dev_tx_queue_release(txq);
                PMD_DRV_LOG(ERR, "Failed to reserve DMA memory for TX");
                return -ENOMEM;
        }

        txq->nb_tx_desc = nb_desc;
        txq->tx_rs_thresh = tx_rs_thresh;
        txq->tx_free_thresh = tx_free_thresh;
        txq->pthresh = tx_conf->tx_thresh.pthresh;
        txq->hthresh = tx_conf->tx_thresh.hthresh;
        txq->wthresh = tx_conf->tx_thresh.wthresh;
        txq->queue_id = queue_idx;
        txq->reg_idx = reg_idx;
        txq->port_id = dev->data->port_id;
        txq->offloads = offloads;
        txq->vsi = vsi;
        txq->tx_deferred_start = tx_conf->tx_deferred_start;

        txq->tx_ring_phys_addr = tz->iova;
        txq->tx_ring = (struct i40e_tx_desc *)tz->addr;

        /* Allocate software ring */
        txq->sw_ring =
                rte_zmalloc_socket("i40e tx sw ring",
                                   sizeof(struct i40e_tx_entry) * nb_desc,
                                   RTE_CACHE_LINE_SIZE,
                                   socket_id);
        if (!txq->sw_ring) {
                i40e_dev_tx_queue_release(txq);
                PMD_DRV_LOG(ERR, "Failed to allocate memory for SW TX ring");
                return -ENOMEM;
        }

        i40e_reset_tx_queue(txq);
        txq->q_set = TRUE;

        for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
                if (!(vsi->enabled_tc & (1 << i)))
                        continue;
                tc_mapping = rte_le_to_cpu_16(vsi->info.tc_mapping[i]);
                base = (tc_mapping & I40E_AQ_VSI_TC_QUE_OFFSET_MASK) >>
                        I40E_AQ_VSI_TC_QUE_OFFSET_SHIFT;
                bsf = (tc_mapping & I40E_AQ_VSI_TC_QUE_NUMBER_MASK) >>
                        I40E_AQ_VSI_TC_QUE_NUMBER_SHIFT;

                if (queue_idx >= base && queue_idx < (base + BIT(bsf)))
                        txq->dcb_tc = i;
        }

        if (dev->data->dev_started) {
                if (i40e_dev_tx_queue_setup_runtime(dev, txq)) {
                        i40e_dev_tx_queue_release(txq);
                        return -EINVAL;
                }
        } else {
                /**
                 * Use a simple TX queue without offloads or
                 * multi segs if possible
                 */
                i40e_set_tx_function_flag(dev, txq);
        }
        dev->data->tx_queues[queue_idx] = txq;

        return 0;
}

void
i40e_dev_tx_queue_release(void *txq)
{
        struct i40e_tx_queue *q = (struct i40e_tx_queue *)txq;

        if (!q) {
                PMD_DRV_LOG(DEBUG, "Pointer to TX queue is NULL");
                return;
        }

        i40e_tx_queue_release_mbufs(q);
        rte_free(q->sw_ring);
        rte_free(q);
}

const struct rte_memzone *
i40e_memzone_reserve(const char *name, uint32_t len, int socket_id)
{
        const struct rte_memzone *mz;

        mz = rte_memzone_lookup(name);
        if (mz)
                return mz;

        mz = rte_memzone_reserve_aligned(name, len, socket_id,
                        RTE_MEMZONE_IOVA_CONTIG, I40E_RING_BASE_ALIGN);
        return mz;
}

void
i40e_rx_queue_release_mbufs(struct i40e_rx_queue *rxq)
{
        uint16_t i;

        /* SSE Vector driver has a different way of releasing mbufs. */
        if (rxq->rx_using_sse) {
                i40e_rx_queue_release_mbufs_vec(rxq);
                return;
        }

        if (!rxq->sw_ring) {
                PMD_DRV_LOG(DEBUG, "Pointer to sw_ring is NULL");
                return;
        }

        for (i = 0; i < rxq->nb_rx_desc; i++) {
                if (rxq->sw_ring[i].mbuf) {
                        rte_pktmbuf_free_seg(rxq->sw_ring[i].mbuf);
                        rxq->sw_ring[i].mbuf = NULL;
                }
        }
#ifdef RTE_LIBRTE_I40E_RX_ALLOW_BULK_ALLOC
        if (rxq->rx_nb_avail == 0)
                return;
        for (i = 0; i < rxq->rx_nb_avail; i++) {
                struct rte_mbuf *mbuf;

                mbuf = rxq->rx_stage[rxq->rx_next_avail + i];
                rte_pktmbuf_free_seg(mbuf);
        }
        rxq->rx_nb_avail = 0;
#endif /* RTE_LIBRTE_I40E_RX_ALLOW_BULK_ALLOC */
}

void
i40e_reset_rx_queue(struct i40e_rx_queue *rxq)
{
        unsigned i;
        uint16_t len;

        if (!rxq) {
                PMD_DRV_LOG(DEBUG, "Pointer to rxq is NULL");
                return;
        }

#ifdef RTE_LIBRTE_I40E_RX_ALLOW_BULK_ALLOC
        if (check_rx_burst_bulk_alloc_preconditions(rxq) == 0)
                len = (uint16_t)(rxq->nb_rx_desc + RTE_PMD_I40E_RX_MAX_BURST);
        else
#endif /* RTE_LIBRTE_I40E_RX_ALLOW_BULK_ALLOC */
                len = rxq->nb_rx_desc;

        for (i = 0; i < len * sizeof(union i40e_rx_desc); i++)
                ((volatile char *)rxq->rx_ring)[i] = 0;

        memset(&rxq->fake_mbuf, 0x0, sizeof(rxq->fake_mbuf));
        for (i = 0; i < RTE_PMD_I40E_RX_MAX_BURST; ++i)
                rxq->sw_ring[rxq->nb_rx_desc + i].mbuf = &rxq->fake_mbuf;

#ifdef RTE_LIBRTE_I40E_RX_ALLOW_BULK_ALLOC
        rxq->rx_nb_avail = 0;
        rxq->rx_next_avail = 0;
        rxq->rx_free_trigger = (uint16_t)(rxq->rx_free_thresh - 1);
#endif /* RTE_LIBRTE_I40E_RX_ALLOW_BULK_ALLOC */
        rxq->rx_tail = 0;
        rxq->nb_rx_hold = 0;
        rxq->pkt_first_seg = NULL;
        rxq->pkt_last_seg = NULL;

        rxq->rxrearm_start = 0;
        rxq->rxrearm_nb = 0;
}

void
i40e_tx_queue_release_mbufs(struct i40e_tx_queue *txq)
{
        struct rte_eth_dev *dev;
        uint16_t i;

        if (!txq || !txq->sw_ring) {
                PMD_DRV_LOG(DEBUG, "Pointer to txq or sw_ring is NULL");
                return;
        }

        dev = &rte_eth_devices[txq->port_id];

        /**
         *  vPMD tx will not set sw_ring's mbuf to NULL after free,
         *  so need to free remains more carefully.
         */
#ifdef CC_AVX512_SUPPORT
        if (dev->tx_pkt_burst == i40e_xmit_pkts_vec_avx512) {
                struct i40e_vec_tx_entry *swr = (void *)txq->sw_ring;

                i = txq->tx_next_dd - txq->tx_rs_thresh + 1;
                if (txq->tx_tail < i) {
                        for (; i < txq->nb_tx_desc; i++) {
                                rte_pktmbuf_free_seg(swr[i].mbuf);
                                swr[i].mbuf = NULL;
                        }
                        i = 0;
                }
                for (; i < txq->tx_tail; i++) {
                        rte_pktmbuf_free_seg(swr[i].mbuf);
                        swr[i].mbuf = NULL;
                }
                return;
        }
#endif
        if (dev->tx_pkt_burst == i40e_xmit_pkts_vec_avx2 ||
                        dev->tx_pkt_burst == i40e_xmit_pkts_vec) {
                i = txq->tx_next_dd - txq->tx_rs_thresh + 1;
                if (txq->tx_tail < i) {
                        for (; i < txq->nb_tx_desc; i++) {
                                rte_pktmbuf_free_seg(txq->sw_ring[i].mbuf);
                                txq->sw_ring[i].mbuf = NULL;
                        }
                        i = 0;
                }
                for (; i < txq->tx_tail; i++) {
                        rte_pktmbuf_free_seg(txq->sw_ring[i].mbuf);
                        txq->sw_ring[i].mbuf = NULL;
                }
        } else {
                for (i = 0; i < txq->nb_tx_desc; i++) {
                        if (txq->sw_ring[i].mbuf) {
                                rte_pktmbuf_free_seg(txq->sw_ring[i].mbuf);
                                txq->sw_ring[i].mbuf = NULL;
                        }
                }
        }
}

static int
i40e_tx_done_cleanup_full(struct i40e_tx_queue *txq,
                        uint32_t free_cnt)
{
        struct i40e_tx_entry *swr_ring = txq->sw_ring;
        uint16_t i, tx_last, tx_id;
        uint16_t nb_tx_free_last;
        uint16_t nb_tx_to_clean;
        uint32_t pkt_cnt;

        /* Start free mbuf from the next of tx_tail */
        tx_last = txq->tx_tail;
        tx_id  = swr_ring[tx_last].next_id;

        if (txq->nb_tx_free == 0 && i40e_xmit_cleanup(txq))
                return 0;

        nb_tx_to_clean = txq->nb_tx_free;
        nb_tx_free_last = txq->nb_tx_free;
        if (!free_cnt)
                free_cnt = txq->nb_tx_desc;

        /* Loop through swr_ring to count the amount of
         * freeable mubfs and packets.
         */
        for (pkt_cnt = 0; pkt_cnt < free_cnt; ) {
                for (i = 0; i < nb_tx_to_clean &&
                        pkt_cnt < free_cnt &&
                        tx_id != tx_last; i++) {
                        if (swr_ring[tx_id].mbuf != NULL) {
                                rte_pktmbuf_free_seg(swr_ring[tx_id].mbuf);
                                swr_ring[tx_id].mbuf = NULL;

                                /*
                                 * last segment in the packet,
                                 * increment packet count
                                 */
                                pkt_cnt += (swr_ring[tx_id].last_id == tx_id);
                        }

                        tx_id = swr_ring[tx_id].next_id;
                }

                if (txq->tx_rs_thresh > txq->nb_tx_desc -
                        txq->nb_tx_free || tx_id == tx_last)
                        break;

                if (pkt_cnt < free_cnt) {
                        if (i40e_xmit_cleanup(txq))
                                break;

                        nb_tx_to_clean = txq->nb_tx_free - nb_tx_free_last;
                        nb_tx_free_last = txq->nb_tx_free;
                }
        }

        return (int)pkt_cnt;
}

static int
i40e_tx_done_cleanup_simple(struct i40e_tx_queue *txq,
                        uint32_t free_cnt)
{
        int i, n, cnt;

        if (free_cnt == 0 || free_cnt > txq->nb_tx_desc)
                free_cnt = txq->nb_tx_desc;

        cnt = free_cnt - free_cnt % txq->tx_rs_thresh;

        for (i = 0; i < cnt; i += n) {
                if (txq->nb_tx_desc - txq->nb_tx_free < txq->tx_rs_thresh)
                        break;

                n = i40e_tx_free_bufs(txq);

                if (n == 0)
                        break;
        }

        return i;
}

static int
i40e_tx_done_cleanup_vec(struct i40e_tx_queue *txq __rte_unused,
                        uint32_t free_cnt __rte_unused)
{
        return -ENOTSUP;
}
int
i40e_tx_done_cleanup(void *txq, uint32_t free_cnt)
{
        struct i40e_tx_queue *q = (struct i40e_tx_queue *)txq;
        struct rte_eth_dev *dev = &rte_eth_devices[q->port_id];
        struct i40e_adapter *ad =
                I40E_DEV_PRIVATE_TO_ADAPTER(dev->data->dev_private);

        if (ad->tx_simple_allowed) {
                if (ad->tx_vec_allowed)
                        return i40e_tx_done_cleanup_vec(q, free_cnt);
                else
                        return i40e_tx_done_cleanup_simple(q, free_cnt);
        } else {
                return i40e_tx_done_cleanup_full(q, free_cnt);
        }
}

void
i40e_reset_tx_queue(struct i40e_tx_queue *txq)
{
        struct i40e_tx_entry *txe;
        uint16_t i, prev, size;

        if (!txq) {
                PMD_DRV_LOG(DEBUG, "Pointer to txq is NULL");
                return;
        }

        txe = txq->sw_ring;
        size = sizeof(struct i40e_tx_desc) * txq->nb_tx_desc;
        for (i = 0; i < size; i++)
                ((volatile char *)txq->tx_ring)[i] = 0;

        prev = (uint16_t)(txq->nb_tx_desc - 1);
        for (i = 0; i < txq->nb_tx_desc; i++) {
                volatile struct i40e_tx_desc *txd = &txq->tx_ring[i];

                txd->cmd_type_offset_bsz =
                        rte_cpu_to_le_64(I40E_TX_DESC_DTYPE_DESC_DONE);
                txe[i].mbuf =  NULL;
                txe[i].last_id = i;
                txe[prev].next_id = i;
                prev = i;
        }

        txq->tx_next_dd = (uint16_t)(txq->tx_rs_thresh - 1);
        txq->tx_next_rs = (uint16_t)(txq->tx_rs_thresh - 1);

        txq->tx_tail = 0;
        txq->nb_tx_used = 0;

        txq->last_desc_cleaned = (uint16_t)(txq->nb_tx_desc - 1);
        txq->nb_tx_free = (uint16_t)(txq->nb_tx_desc - 1);
}

/* Init the TX queue in hardware */
int
i40e_tx_queue_init(struct i40e_tx_queue *txq)
{
        enum i40e_status_code err = I40E_SUCCESS;
        struct i40e_vsi *vsi = txq->vsi;
        struct i40e_hw *hw = I40E_VSI_TO_HW(vsi);
        uint16_t pf_q = txq->reg_idx;
        struct i40e_hmc_obj_txq tx_ctx;
        uint32_t qtx_ctl;

        /* clear the context structure first */
        memset(&tx_ctx, 0, sizeof(tx_ctx));
        tx_ctx.new_context = 1;
        tx_ctx.base = txq->tx_ring_phys_addr / I40E_QUEUE_BASE_ADDR_UNIT;
        tx_ctx.qlen = txq->nb_tx_desc;

#ifdef RTE_LIBRTE_IEEE1588
        tx_ctx.timesync_ena = 1;
#endif
        tx_ctx.rdylist = rte_le_to_cpu_16(vsi->info.qs_handle[txq->dcb_tc]);
        if (vsi->type == I40E_VSI_FDIR)
                tx_ctx.fd_ena = TRUE;

        err = i40e_clear_lan_tx_queue_context(hw, pf_q);
        if (err != I40E_SUCCESS) {
                PMD_DRV_LOG(ERR, "Failure of clean lan tx queue context");
                return err;
        }

        err = i40e_set_lan_tx_queue_context(hw, pf_q, &tx_ctx);
        if (err != I40E_SUCCESS) {
                PMD_DRV_LOG(ERR, "Failure of set lan tx queue context");
                return err;
        }

        /* Now associate this queue with this PCI function */
        qtx_ctl = I40E_QTX_CTL_PF_QUEUE;
        qtx_ctl |= ((hw->pf_id << I40E_QTX_CTL_PF_INDX_SHIFT) &
                                        I40E_QTX_CTL_PF_INDX_MASK);
        I40E_WRITE_REG(hw, I40E_QTX_CTL(pf_q), qtx_ctl);
        I40E_WRITE_FLUSH(hw);

        txq->qtx_tail = hw->hw_addr + I40E_QTX_TAIL(pf_q);

        return err;
}

int
i40e_alloc_rx_queue_mbufs(struct i40e_rx_queue *rxq)
{
        struct i40e_rx_entry *rxe = rxq->sw_ring;
        uint64_t dma_addr;
        uint16_t i;

        for (i = 0; i < rxq->nb_rx_desc; i++) {
                volatile union i40e_rx_desc *rxd;
                struct rte_mbuf *mbuf = rte_mbuf_raw_alloc(rxq->mp);

                if (unlikely(!mbuf)) {
                        PMD_DRV_LOG(ERR, "Failed to allocate mbuf for RX");
                        return -ENOMEM;
                }

                rte_mbuf_refcnt_set(mbuf, 1);
                mbuf->next = NULL;
                mbuf->data_off = RTE_PKTMBUF_HEADROOM;
                mbuf->nb_segs = 1;
                mbuf->port = rxq->port_id;

                dma_addr =
                        rte_cpu_to_le_64(rte_mbuf_data_iova_default(mbuf));

                rxd = &rxq->rx_ring[i];
                rxd->read.pkt_addr = dma_addr;
                rxd->read.hdr_addr = 0;
#ifndef RTE_LIBRTE_I40E_16BYTE_RX_DESC
                rxd->read.rsvd1 = 0;
                rxd->read.rsvd2 = 0;
#endif /* RTE_LIBRTE_I40E_16BYTE_RX_DESC */

                rxe[i].mbuf = mbuf;
        }

        return 0;
}

/*
 * Calculate the buffer length, and check the jumbo frame
 * and maximum packet length.
 */
static int
i40e_rx_queue_config(struct i40e_rx_queue *rxq)
{
        struct i40e_pf *pf = I40E_VSI_TO_PF(rxq->vsi);
        struct i40e_hw *hw = I40E_VSI_TO_HW(rxq->vsi);
        struct rte_eth_dev_data *data = pf->dev_data;
        uint16_t buf_size;

        buf_size = (uint16_t)(rte_pktmbuf_data_room_size(rxq->mp) -
                RTE_PKTMBUF_HEADROOM);

        switch (pf->flags & (I40E_FLAG_HEADER_SPLIT_DISABLED |
                        I40E_FLAG_HEADER_SPLIT_ENABLED)) {
        case I40E_FLAG_HEADER_SPLIT_ENABLED: /* Not supported */
                rxq->rx_hdr_len = RTE_ALIGN(I40E_RXBUF_SZ_1024,
                                (1 << I40E_RXQ_CTX_HBUFF_SHIFT));
                rxq->rx_buf_len = RTE_ALIGN(I40E_RXBUF_SZ_2048,
                                (1 << I40E_RXQ_CTX_DBUFF_SHIFT));
                rxq->hs_mode = i40e_header_split_enabled;
                break;
        case I40E_FLAG_HEADER_SPLIT_DISABLED:
        default:
                rxq->rx_hdr_len = 0;
                rxq->rx_buf_len = RTE_ALIGN_FLOOR(buf_size,
                        (1 << I40E_RXQ_CTX_DBUFF_SHIFT));
                rxq->hs_mode = i40e_header_split_none;
                break;
        }

        rxq->max_pkt_len =
                RTE_MIN((uint32_t)(hw->func_caps.rx_buf_chain_len *
                        rxq->rx_buf_len), data->dev_conf.rxmode.max_rx_pkt_len);
        if (data->dev_conf.rxmode.offloads & DEV_RX_OFFLOAD_JUMBO_FRAME) {
                if (rxq->max_pkt_len <= I40E_ETH_MAX_LEN ||
                        rxq->max_pkt_len > I40E_FRAME_SIZE_MAX) {
                        PMD_DRV_LOG(ERR, "maximum packet length must "
                                    "be larger than %u and smaller than %u,"
                                    "as jumbo frame is enabled",
                                    (uint32_t)I40E_ETH_MAX_LEN,
                                    (uint32_t)I40E_FRAME_SIZE_MAX);
                        return I40E_ERR_CONFIG;
                }
        } else {
                if (rxq->max_pkt_len < RTE_ETHER_MIN_LEN ||
                        rxq->max_pkt_len > I40E_ETH_MAX_LEN) {
                        PMD_DRV_LOG(ERR, "maximum packet length must be "
                                    "larger than %u and smaller than %u, "
                                    "as jumbo frame is disabled",
                                    (uint32_t)RTE_ETHER_MIN_LEN,
                                    (uint32_t)I40E_ETH_MAX_LEN);
                        return I40E_ERR_CONFIG;
                }
        }

        return 0;
}

/* Init the RX queue in hardware */
int
i40e_rx_queue_init(struct i40e_rx_queue *rxq)
{
        int err = I40E_SUCCESS;
        struct i40e_hw *hw = I40E_VSI_TO_HW(rxq->vsi);
        struct rte_eth_dev_data *dev_data = I40E_VSI_TO_DEV_DATA(rxq->vsi);
        uint16_t pf_q = rxq->reg_idx;
        uint16_t buf_size;
        struct i40e_hmc_obj_rxq rx_ctx;

        err = i40e_rx_queue_config(rxq);
        if (err < 0) {
                PMD_DRV_LOG(ERR, "Failed to config RX queue");
                return err;
        }

        /* Clear the context structure first */
        memset(&rx_ctx, 0, sizeof(struct i40e_hmc_obj_rxq));
        rx_ctx.dbuff = rxq->rx_buf_len >> I40E_RXQ_CTX_DBUFF_SHIFT;
        rx_ctx.hbuff = rxq->rx_hdr_len >> I40E_RXQ_CTX_HBUFF_SHIFT;

        rx_ctx.base = rxq->rx_ring_phys_addr / I40E_QUEUE_BASE_ADDR_UNIT;
        rx_ctx.qlen = rxq->nb_rx_desc;
#ifndef RTE_LIBRTE_I40E_16BYTE_RX_DESC
        rx_ctx.dsize = 1;
#endif
        rx_ctx.dtype = rxq->hs_mode;
        if (rxq->hs_mode)
                rx_ctx.hsplit_0 = I40E_HEADER_SPLIT_ALL;
        else
                rx_ctx.hsplit_0 = I40E_HEADER_SPLIT_NONE;
        rx_ctx.rxmax = rxq->max_pkt_len;
        rx_ctx.tphrdesc_ena = 1;
        rx_ctx.tphwdesc_ena = 1;
        rx_ctx.tphdata_ena = 1;
        rx_ctx.tphhead_ena = 1;
        rx_ctx.lrxqthresh = 2;
        rx_ctx.crcstrip = (rxq->crc_len == 0) ? 1 : 0;
        rx_ctx.l2tsel = 1;
        /* showiv indicates if inner VLAN is stripped inside of tunnel
         * packet. When set it to 1, vlan information is stripped from
         * the inner header, but the hardware does not put it in the
         * descriptor. So set it zero by default.
         */
        rx_ctx.showiv = 0;
        rx_ctx.prefena = 1;