numam-dpdk/drivers/net/ixgbe/ixgbe_rxtx_vec_neon.c

/* SPDX-License-Identifier: BSD-3-Clause
 * Copyright(c) 2010-2015 Intel Corporation
 */

#include <stdint.h>
#include <ethdev_driver.h>
#include <rte_malloc.h>
#include <rte_vect.h>

#include "ixgbe_ethdev.h"
#include "ixgbe_rxtx.h"
#include "ixgbe_rxtx_vec_common.h"

#pragma GCC diagnostic ignored "-Wcast-qual"

static inline void
ixgbe_rxq_rearm(struct ixgbe_rx_queue *rxq)
{
	int i;
	uint16_t rx_id;
	volatile union ixgbe_adv_rx_desc *rxdp;
	struct ixgbe_rx_entry *rxep = &rxq->sw_ring[rxq->rxrearm_start];
	struct rte_mbuf *mb0, *mb1;
	uint64x2_t dma_addr0, dma_addr1;
	uint64x2_t zero = vdupq_n_u64(0);
	uint64_t paddr;
	uint8x8_t p;

	rxdp = rxq->rx_ring + rxq->rxrearm_start;

	/* Pull 'n' more MBUFs into the software ring */
	if (unlikely(rte_mempool_get_bulk(rxq->mb_pool,
					  (void *)rxep,
					  RTE_IXGBE_RXQ_REARM_THRESH) < 0)) {
		if (rxq->rxrearm_nb + RTE_IXGBE_RXQ_REARM_THRESH >=
		    rxq->nb_rx_desc) {
			for (i = 0; i < RTE_IXGBE_DESCS_PER_LOOP; i++) {
				rxep[i].mbuf = &rxq->fake_mbuf;
				vst1q_u64((uint64_t *)&rxdp[i].read,
					  zero);
			}
		}
		rte_eth_devices[rxq->port_id].data->rx_mbuf_alloc_failed +=
			RTE_IXGBE_RXQ_REARM_THRESH;
		return;
	}

	p = vld1_u8((uint8_t *)&rxq->mbuf_initializer);

	/* Initialize the mbufs in vector, process 2 mbufs in one loop */
	for (i = 0; i < RTE_IXGBE_RXQ_REARM_THRESH; i += 2, rxep += 2) {
		mb0 = rxep[0].mbuf;
		mb1 = rxep[1].mbuf;

		/*
		 * Flush mbuf with pkt template.
		 * Data to be rearmed is 6 bytes long.
		 */
		vst1_u8((uint8_t *)&mb0->rearm_data, p);
		paddr = mb0->buf_iova + RTE_PKTMBUF_HEADROOM;
		dma_addr0 = vsetq_lane_u64(paddr, zero, 0);
		/* flush desc with pa dma_addr */
		vst1q_u64((uint64_t *)&rxdp++->read, dma_addr0);

		vst1_u8((uint8_t *)&mb1->rearm_data, p);
		paddr = mb1->buf_iova + RTE_PKTMBUF_HEADROOM;
		dma_addr1 = vsetq_lane_u64(paddr, zero, 0);
		vst1q_u64((uint64_t *)&rxdp++->read, dma_addr1);
	}

	rxq->rxrearm_start += RTE_IXGBE_RXQ_REARM_THRESH;
	if (rxq->rxrearm_start >= rxq->nb_rx_desc)
		rxq->rxrearm_start = 0;

	rxq->rxrearm_nb -= RTE_IXGBE_RXQ_REARM_THRESH;

	rx_id = (uint16_t)((rxq->rxrearm_start == 0) ?
			     (rxq->nb_rx_desc - 1) : (rxq->rxrearm_start - 1));

	/* Update the tail pointer on the NIC */
	IXGBE_PCI_REG_WRITE(rxq->rdt_reg_addr, rx_id);
}

static inline void
desc_to_olflags_v(uint8x16x2_t sterr_tmp1, uint8x16x2_t sterr_tmp2,
		  uint8x16_t staterr, uint8_t vlan_flags, uint16_t udp_p_flag,
		  struct rte_mbuf **rx_pkts)
{
	uint16_t udp_p_flag_hi;
	uint8x16_t ptype, udp_csum_skip;
	uint32x4_t temp_udp_csum_skip = {0, 0, 0, 0};
	uint8x16_t vtag_lo, vtag_hi, vtag;
	uint8x16_t temp_csum;
	uint32x4_t csum = {0, 0, 0, 0};

	union {
		uint16_t e[4];
		uint64_t word;
	} vol;

	const uint8x16_t rsstype_msk = {
			0x0F, 0x0F, 0x0F, 0x0F,
			0x00, 0x00, 0x00, 0x00,
			0x00, 0x00, 0x00, 0x00,
			0x00, 0x00, 0x00, 0x00};

	const uint8x16_t rss_flags = {
			0, PKT_RX_RSS_HASH, PKT_RX_RSS_HASH, PKT_RX_RSS_HASH,
			0, PKT_RX_RSS_HASH, 0, PKT_RX_RSS_HASH,
			PKT_RX_RSS_HASH, 0, 0, 0,
			0, 0, 0, PKT_RX_FDIR};

	/* mask everything except vlan present and l4/ip csum error */
	const uint8x16_t vlan_csum_msk = {
			IXGBE_RXD_STAT_VP, IXGBE_RXD_STAT_VP,
			IXGBE_RXD_STAT_VP, IXGBE_RXD_STAT_VP,
			0, 0, 0, 0,
			0, 0, 0, 0,
			(IXGBE_RXDADV_ERR_TCPE | IXGBE_RXDADV_ERR_IPE) >> 24,
			(IXGBE_RXDADV_ERR_TCPE | IXGBE_RXDADV_ERR_IPE) >> 24,
			(IXGBE_RXDADV_ERR_TCPE | IXGBE_RXDADV_ERR_IPE) >> 24,
			(IXGBE_RXDADV_ERR_TCPE | IXGBE_RXDADV_ERR_IPE) >> 24};

	/* map vlan present (0x8), IPE (0x2), L4E (0x1) to ol_flags */
	const uint8x16_t vlan_csum_map_lo = {
			PKT_RX_IP_CKSUM_GOOD,
			PKT_RX_IP_CKSUM_GOOD | PKT_RX_L4_CKSUM_BAD,
			PKT_RX_IP_CKSUM_BAD,
			PKT_RX_IP_CKSUM_BAD | PKT_RX_L4_CKSUM_BAD,
			0, 0, 0, 0,
			vlan_flags | PKT_RX_IP_CKSUM_GOOD,
			vlan_flags | PKT_RX_IP_CKSUM_GOOD | PKT_RX_L4_CKSUM_BAD,
			vlan_flags | PKT_RX_IP_CKSUM_BAD,
			vlan_flags | PKT_RX_IP_CKSUM_BAD | PKT_RX_L4_CKSUM_BAD,
			0, 0, 0, 0};

	const uint8x16_t vlan_csum_map_hi = {
			PKT_RX_L4_CKSUM_GOOD >> sizeof(uint8_t), 0,
			PKT_RX_L4_CKSUM_GOOD >> sizeof(uint8_t), 0,
			0, 0, 0, 0,
			PKT_RX_L4_CKSUM_GOOD >> sizeof(uint8_t), 0,
			PKT_RX_L4_CKSUM_GOOD >> sizeof(uint8_t), 0,
			0, 0, 0, 0};

	/* change mask from 0x200(IXGBE_RXDADV_PKTTYPE_UDP) to 0x2 */
	udp_p_flag_hi = udp_p_flag >> 8;

	/* mask everything except UDP header present if specified */
	const uint8x16_t udp_hdr_p_msk = {
			0, 0, 0, 0,
			udp_p_flag_hi, udp_p_flag_hi, udp_p_flag_hi, udp_p_flag_hi,
			0, 0, 0, 0,
			0, 0, 0, 0};

	const uint8x16_t udp_csum_bad_shuf = {
			0xFF, ~(uint8_t)PKT_RX_L4_CKSUM_BAD, 0, 0,
			0, 0, 0, 0,
			0, 0, 0, 0,
			0, 0, 0, 0};

	ptype = vzipq_u8(sterr_tmp1.val[0], sterr_tmp2.val[0]).val[0];

	/* save the UDP header present information */
	udp_csum_skip = vandq_u8(ptype, udp_hdr_p_msk);

	/* move UDP header present information to low 32bits */
	temp_udp_csum_skip = vcopyq_laneq_u32(temp_udp_csum_skip, 0,
				vreinterpretq_u32_u8(udp_csum_skip), 1);

	ptype = vandq_u8(ptype, rsstype_msk);
	ptype = vqtbl1q_u8(rss_flags, ptype);

	/* extract vlan_flags and csum_error from staterr */
	vtag = vandq_u8(staterr, vlan_csum_msk);

	/* csum bits are in the most significant, to use shuffle we need to
	 * shift them. Change mask from 0xc0 to 0x03.
	 */
	temp_csum = vshrq_n_u8(vtag, 6);

	/* 'OR' the most significant 32 bits containing the checksum
	 * flags with the vlan present flags
	 * Then bits layout of each lane(8bits) will be 'xxxx,VP,x,IPE,L4E'
	 */
	csum = vsetq_lane_u32(vgetq_lane_u32(vreinterpretq_u32_u8(temp_csum), 3), csum, 0);
	vtag = vorrq_u8(vreinterpretq_u8_u32(csum), vtag);

	/* convert L4 checksum correct type to vtag_hi */
	vtag_hi = vqtbl1q_u8(vlan_csum_map_hi, vtag);
	vtag_hi = vshrq_n_u8(vtag_hi, 7);

	/* convert VP, IPE, L4E to vtag_lo */
	vtag_lo = vqtbl1q_u8(vlan_csum_map_lo, vtag);
	vtag_lo = vorrq_u8(ptype, vtag_lo);

	/* convert the UDP header present 0x2 to 0x1 for aligning with each
	 * PKT_RX_L4_CKSUM_BAD value in low byte of 8 bits word ol_flag in
	 * vtag_lo (4x8). Then mask out the bad checksum value by shuffle and
	 * bit-mask.
	 */
	udp_csum_skip = vshrq_n_u8(vreinterpretq_u8_u32(temp_udp_csum_skip), 1);
	udp_csum_skip = vqtbl1q_u8(udp_csum_bad_shuf, udp_csum_skip);
	vtag_lo = vandq_u8(vtag_lo, udp_csum_skip);

	vtag = vzipq_u8(vtag_lo, vtag_hi).val[0];
	vol.word = vgetq_lane_u64(vreinterpretq_u64_u8(vtag), 0);

	rx_pkts[0]->ol_flags = vol.e[0];
	rx_pkts[1]->ol_flags = vol.e[1];
	rx_pkts[2]->ol_flags = vol.e[2];
	rx_pkts[3]->ol_flags = vol.e[3];
}

#define IXGBE_VPMD_DESC_EOP_MASK	0x02020202
#define IXGBE_UINT8_BIT			(CHAR_BIT * sizeof(uint8_t))

static inline uint32_t
get_packet_type(uint32_t pkt_info,
		uint32_t etqf_check,
		uint32_t tunnel_check)
{
	if (etqf_check)
		return RTE_PTYPE_UNKNOWN;

	if (tunnel_check) {
		pkt_info &= IXGBE_PACKET_TYPE_MASK_TUNNEL;
		return ptype_table_tn[pkt_info];
	}

	pkt_info &= IXGBE_PACKET_TYPE_MASK_82599;
	return ptype_table[pkt_info];
}

static inline void
desc_to_ptype_v(uint64x2_t descs[4], uint16_t pkt_type_mask,
		struct rte_mbuf **rx_pkts)
{
	uint32x4_t etqf_check, tunnel_check;
	uint32x4_t etqf_mask = vdupq_n_u32(0x8000);
	uint32x4_t tunnel_mask = vdupq_n_u32(0x10000);
	uint32x4_t ptype_mask = vdupq_n_u32((uint32_t)pkt_type_mask);
	uint32x4_t ptype0 = vzipq_u32(vreinterpretq_u32_u64(descs[0]),
				vreinterpretq_u32_u64(descs[2])).val[0];
	uint32x4_t ptype1 = vzipq_u32(vreinterpretq_u32_u64(descs[1]),
				vreinterpretq_u32_u64(descs[3])).val[0];

	/* interleave low 32 bits,
	 * now we have 4 ptypes in a NEON register
	 */
	ptype0 = vzipq_u32(ptype0, ptype1).val[0];

	/* mask etqf bits */
	etqf_check = vandq_u32(ptype0, etqf_mask);
	/* mask tunnel bits */
	tunnel_check = vandq_u32(ptype0, tunnel_mask);

	/* shift right by IXGBE_PACKET_TYPE_SHIFT, and apply ptype mask */
	ptype0 = vandq_u32(vshrq_n_u32(ptype0, IXGBE_PACKET_TYPE_SHIFT),
			ptype_mask);

	rx_pkts[0]->packet_type =
		get_packet_type(vgetq_lane_u32(ptype0, 0),
				vgetq_lane_u32(etqf_check, 0),
				vgetq_lane_u32(tunnel_check, 0));
	rx_pkts[1]->packet_type =
		get_packet_type(vgetq_lane_u32(ptype0, 1),
				vgetq_lane_u32(etqf_check, 1),
				vgetq_lane_u32(tunnel_check, 1));
	rx_pkts[2]->packet_type =
		get_packet_type(vgetq_lane_u32(ptype0, 2),
				vgetq_lane_u32(etqf_check, 2),
				vgetq_lane_u32(tunnel_check, 2));
	rx_pkts[3]->packet_type =
		get_packet_type(vgetq_lane_u32(ptype0, 3),
				vgetq_lane_u32(etqf_check, 3),
				vgetq_lane_u32(tunnel_check, 3));
}

/**
 * vPMD raw receive routine, only accept(nb_pkts >= RTE_IXGBE_DESCS_PER_LOOP)
 *
 * Notice:
 * - nb_pkts < RTE_IXGBE_DESCS_PER_LOOP, just return no packet
 * - floor align nb_pkts to a RTE_IXGBE_DESC_PER_LOOP power-of-two
 */
static inline uint16_t
_recv_raw_pkts_vec(struct ixgbe_rx_queue *rxq, struct rte_mbuf **rx_pkts,
		   uint16_t nb_pkts, uint8_t *split_packet)
{
	volatile union ixgbe_adv_rx_desc *rxdp;
	struct ixgbe_rx_entry *sw_ring;
	uint16_t nb_pkts_recd;
	int pos;
	uint8x16_t shuf_msk = {
		0xFF, 0xFF,
		0xFF, 0xFF,  /* skip 32 bits pkt_type */
		12, 13,      /* octet 12~13, low 16 bits pkt_len */
		0xFF, 0xFF,  /* skip high 16 bits pkt_len, zero out */
		12, 13,      /* octet 12~13, 16 bits data_len */
		14, 15,      /* octet 14~15, low 16 bits vlan_macip */
		4, 5, 6, 7  /* octet 4~7, 32bits rss */
		};
	uint16x8_t crc_adjust = {0, 0, rxq->crc_len, 0,
				 rxq->crc_len, 0, 0, 0};
	uint8_t vlan_flags;
	uint16_t udp_p_flag = 0; /* Rx Descriptor UDP header present */

	/* nb_pkts has to be floor-aligned to RTE_IXGBE_DESCS_PER_LOOP */
	nb_pkts = RTE_ALIGN_FLOOR(nb_pkts, RTE_IXGBE_DESCS_PER_LOOP);

	/* Just the act of getting into the function from the application is
	 * going to cost about 7 cycles
	 */
	rxdp = rxq->rx_ring + rxq->rx_tail;

	rte_prefetch_non_temporal(rxdp);

	/* See if we need to rearm the RX queue - gives the prefetch a bit
	 * of time to act
	 */
	if (rxq->rxrearm_nb > RTE_IXGBE_RXQ_REARM_THRESH)
		ixgbe_rxq_rearm(rxq);

	/* Before we start moving massive data around, check to see if
	 * there is actually a packet available
	 */
	if (!(rxdp->wb.upper.status_error &
				rte_cpu_to_le_32(IXGBE_RXDADV_STAT_DD)))
		return 0;

	if (rxq->rx_udp_csum_zero_err)
		udp_p_flag = IXGBE_RXDADV_PKTTYPE_UDP;

	/* Cache is empty -> need to scan the buffer rings, but first move
	 * the next 'n' mbufs into the cache
	 */
	sw_ring = &rxq->sw_ring[rxq->rx_tail];

	/* ensure these 2 flags are in the lower 8 bits */
	RTE_BUILD_BUG_ON((PKT_RX_VLAN | PKT_RX_VLAN_STRIPPED) > UINT8_MAX);
	vlan_flags = rxq->vlan_flags & UINT8_MAX;

	/* A. load 4 packet in one loop
	 * B. copy 4 mbuf point from swring to rx_pkts
	 * C. calc the number of DD bits among the 4 packets
	 * [C*. extract the end-of-packet bit, if requested]
	 * D. fill info. from desc to mbuf
	 */
	for (pos = 0, nb_pkts_recd = 0; pos < nb_pkts;
			pos += RTE_IXGBE_DESCS_PER_LOOP,
			rxdp += RTE_IXGBE_DESCS_PER_LOOP) {
		uint64x2_t descs[RTE_IXGBE_DESCS_PER_LOOP];
		uint8x16_t pkt_mb1, pkt_mb2, pkt_mb3, pkt_mb4;
		uint8x16x2_t sterr_tmp1, sterr_tmp2;
		uint64x2_t mbp1, mbp2;
		uint8x16_t staterr;
		uint16x8_t tmp;
		uint32_t stat;

		/* B.1 load 2 mbuf point */
		mbp1 = vld1q_u64((uint64_t *)&sw_ring[pos]);

		/* B.2 copy 2 mbuf point into rx_pkts  */
		vst1q_u64((uint64_t *)&rx_pkts[pos], mbp1);

		/* B.1 load 2 mbuf point */
		mbp2 = vld1q_u64((uint64_t *)&sw_ring[pos + 2]);

		/* A. load 4 pkts descs */
		descs[0] =  vld1q_u64((uint64_t *)(rxdp));
		descs[1] =  vld1q_u64((uint64_t *)(rxdp + 1));
		descs[2] =  vld1q_u64((uint64_t *)(rxdp + 2));
		descs[3] =  vld1q_u64((uint64_t *)(rxdp + 3));

		/* B.2 copy 2 mbuf point into rx_pkts  */
		vst1q_u64((uint64_t *)&rx_pkts[pos + 2], mbp2);

		if (split_packet) {
			rte_mbuf_prefetch_part2(rx_pkts[pos]);
			rte_mbuf_prefetch_part2(rx_pkts[pos + 1]);
			rte_mbuf_prefetch_part2(rx_pkts[pos + 2]);
			rte_mbuf_prefetch_part2(rx_pkts[pos + 3]);
		}

		/* D.1 pkt 3,4 convert format from desc to pktmbuf */
		pkt_mb4 = vqtbl1q_u8(vreinterpretq_u8_u64(descs[3]), shuf_msk);
		pkt_mb3 = vqtbl1q_u8(vreinterpretq_u8_u64(descs[2]), shuf_msk);

		/* D.1 pkt 1,2 convert format from desc to pktmbuf */
		pkt_mb2 = vqtbl1q_u8(vreinterpretq_u8_u64(descs[1]), shuf_msk);
		pkt_mb1 = vqtbl1q_u8(vreinterpretq_u8_u64(descs[0]), shuf_msk);

		/* C.1 4=>2 filter staterr info only */
		sterr_tmp2 = vzipq_u8(vreinterpretq_u8_u64(descs[1]),
				      vreinterpretq_u8_u64(descs[3]));
		/* C.1 4=>2 filter staterr info only */
		sterr_tmp1 = vzipq_u8(vreinterpretq_u8_u64(descs[0]),
				      vreinterpretq_u8_u64(descs[2]));

		/* C.2 get 4 pkts staterr value  */
		staterr = vzipq_u8(sterr_tmp1.val[1], sterr_tmp2.val[1]).val[0];

		/* set ol_flags with vlan packet type */
		desc_to_olflags_v(sterr_tmp1, sterr_tmp2, staterr, vlan_flags,
				  udp_p_flag, &rx_pkts[pos]);

		/* D.2 pkt 3,4 set in_port/nb_seg and remove crc */
		tmp = vsubq_u16(vreinterpretq_u16_u8(pkt_mb4), crc_adjust);
		pkt_mb4 = vreinterpretq_u8_u16(tmp);
		tmp = vsubq_u16(vreinterpretq_u16_u8(pkt_mb3), crc_adjust);
		pkt_mb3 = vreinterpretq_u8_u16(tmp);

		/* D.3 copy final 3,4 data to rx_pkts */
		vst1q_u8((void *)&rx_pkts[pos + 3]->rx_descriptor_fields1,
			 pkt_mb4);
		vst1q_u8((void *)&rx_pkts[pos + 2]->rx_descriptor_fields1,
			 pkt_mb3);

		/* D.2 pkt 1,2 set in_port/nb_seg and remove crc */
		tmp = vsubq_u16(vreinterpretq_u16_u8(pkt_mb2), crc_adjust);
		pkt_mb2 = vreinterpretq_u8_u16(tmp);
		tmp = vsubq_u16(vreinterpretq_u16_u8(pkt_mb1), crc_adjust);
		pkt_mb1 = vreinterpretq_u8_u16(tmp);

		/* C* extract and record EOP bit */
		if (split_packet) {
			stat = vgetq_lane_u32(vreinterpretq_u32_u8(staterr), 0);
			/* and with mask to extract bits, flipping 1-0 */
			*(int *)split_packet = ~stat & IXGBE_VPMD_DESC_EOP_MASK;

			split_packet += RTE_IXGBE_DESCS_PER_LOOP;
		}

		/* C.4 expand DD bit to saturate UINT8 */
		staterr = vshlq_n_u8(staterr, IXGBE_UINT8_BIT - 1);
		staterr = vreinterpretq_u8_s8
				(vshrq_n_s8(vreinterpretq_s8_u8(staterr),
					IXGBE_UINT8_BIT - 1));
		stat = ~vgetq_lane_u32(vreinterpretq_u32_u8(staterr), 0);

		rte_prefetch_non_temporal(rxdp + RTE_IXGBE_DESCS_PER_LOOP);

		/* D.3 copy final 1,2 data to rx_pkts */
		vst1q_u8((uint8_t *)&rx_pkts[pos + 1]->rx_descriptor_fields1,
			 pkt_mb2);
		vst1q_u8((uint8_t *)&rx_pkts[pos]->rx_descriptor_fields1,
			 pkt_mb1);

		desc_to_ptype_v(descs, rxq->pkt_type_mask, &rx_pkts[pos]);

		/* C.5 calc available number of desc */
		if (unlikely(stat == 0)) {
			nb_pkts_recd += RTE_IXGBE_DESCS_PER_LOOP;
		} else {
			nb_pkts_recd += __builtin_ctz(stat) / IXGBE_UINT8_BIT;
			break;
		}
	}

	/* Update our internal tail pointer */
	rxq->rx_tail = (uint16_t)(rxq->rx_tail + nb_pkts_recd);
	rxq->rx_tail = (uint16_t)(rxq->rx_tail & (rxq->nb_rx_desc - 1));
	rxq->rxrearm_nb = (uint16_t)(rxq->rxrearm_nb + nb_pkts_recd);

	return nb_pkts_recd;
}

/**
 * vPMD receive routine, only accept(nb_pkts >= RTE_IXGBE_DESCS_PER_LOOP)
 *
 * Notice:
 * - nb_pkts < RTE_IXGBE_DESCS_PER_LOOP, just return no packet
 * - floor align nb_pkts to a RTE_IXGBE_DESC_PER_LOOP power-of-two
 */
uint16_t
ixgbe_recv_pkts_vec(void *rx_queue, struct rte_mbuf **rx_pkts,
		uint16_t nb_pkts)
{
	return _recv_raw_pkts_vec(rx_queue, rx_pkts, nb_pkts, NULL);
}

/**
 * vPMD receive routine that reassembles scattered packets
 *
 * Notice:
 * - nb_pkts < RTE_IXGBE_DESCS_PER_LOOP, just return no packet
 * - floor align nb_pkts to a RTE_IXGBE_DESC_PER_LOOP power-of-two
 */
static uint16_t
ixgbe_recv_scattered_burst_vec(void *rx_queue, struct rte_mbuf **rx_pkts,
			       uint16_t nb_pkts)
{
	struct ixgbe_rx_queue *rxq = rx_queue;
	uint8_t split_flags[RTE_IXGBE_MAX_RX_BURST] = {0};

	/* get some new buffers */
	uint16_t nb_bufs = _recv_raw_pkts_vec(rxq, rx_pkts, nb_pkts,
			split_flags);
	if (nb_bufs == 0)
		return 0;

	/* happy day case, full burst + no packets to be joined */
	const uint64_t *split_fl64 = (uint64_t *)split_flags;
	if (rxq->pkt_first_seg == NULL &&
			split_fl64[0] == 0 && split_fl64[1] == 0 &&
			split_fl64[2] == 0 && split_fl64[3] == 0)
		return nb_bufs;

	/* reassemble any packets that need reassembly*/
	unsigned int i = 0;
	if (rxq->pkt_first_seg == NULL) {
		/* find the first split flag, and only reassemble then*/
		while (i < nb_bufs && !split_flags[i])
			i++;
		if (i == nb_bufs)
			return nb_bufs;
		rxq->pkt_first_seg = rx_pkts[i];
	}
	return i + reassemble_packets(rxq, &rx_pkts[i], nb_bufs - i,
		&split_flags[i]);
}

/**
 * vPMD receive routine that reassembles scattered packets.
 */
uint16_t
ixgbe_recv_scattered_pkts_vec(void *rx_queue, struct rte_mbuf **rx_pkts,
			      uint16_t nb_pkts)
{
	uint16_t retval = 0;

	while (nb_pkts > RTE_IXGBE_MAX_RX_BURST) {
		uint16_t burst;

		burst = ixgbe_recv_scattered_burst_vec(rx_queue,
						       rx_pkts + retval,
						       RTE_IXGBE_MAX_RX_BURST);
		retval += burst;
		nb_pkts -= burst;
		if (burst < RTE_IXGBE_MAX_RX_BURST)
			return retval;
	}

	return retval + ixgbe_recv_scattered_burst_vec(rx_queue,
						       rx_pkts + retval,
						       nb_pkts);
}

static inline void
vtx1(volatile union ixgbe_adv_tx_desc *txdp,
		struct rte_mbuf *pkt, uint64_t flags)
{
	uint64x2_t descriptor = {
			pkt->buf_iova + pkt->data_off,
			(uint64_t)pkt->pkt_len << 46 | flags | pkt->data_len};

	vst1q_u64((uint64_t *)&txdp->read, descriptor);
}

static inline void
vtx(volatile union ixgbe_adv_tx_desc *txdp,
		struct rte_mbuf **pkt, uint16_t nb_pkts,  uint64_t flags)
{
	int i;

	for (i = 0; i < nb_pkts; ++i, ++txdp, ++pkt)
		vtx1(txdp, *pkt, flags);
}

uint16_t
ixgbe_xmit_fixed_burst_vec(void *tx_queue, struct rte_mbuf **tx_pkts,
			   uint16_t nb_pkts)
{
	struct ixgbe_tx_queue *txq = (struct ixgbe_tx_queue *)tx_queue;
	volatile union ixgbe_adv_tx_desc *txdp;
	struct ixgbe_tx_entry_v *txep;
	uint16_t n, nb_commit, tx_id;
	uint64_t flags = DCMD_DTYP_FLAGS;
	uint64_t rs = IXGBE_ADVTXD_DCMD_RS | DCMD_DTYP_FLAGS;
	int i;

	/* cross rx_thresh boundary is not allowed */
	nb_pkts = RTE_MIN(nb_pkts, txq->tx_rs_thresh);

	if (txq->nb_tx_free < txq->tx_free_thresh)
		ixgbe_tx_free_bufs(txq);

	nb_commit = nb_pkts = (uint16_t)RTE_MIN(txq->nb_tx_free, nb_pkts);
	if (unlikely(nb_pkts == 0))
		return 0;

	tx_id = txq->tx_tail;
	txdp = &txq->tx_ring[tx_id];
	txep = &txq->sw_ring_v[tx_id];

	txq->nb_tx_free = (uint16_t)(txq->nb_tx_free - nb_pkts);

	n = (uint16_t)(txq->nb_tx_desc - tx_id);
	if (nb_commit >= n) {
		tx_backlog_entry(txep, tx_pkts, n);

		for (i = 0; i < n - 1; ++i, ++tx_pkts, ++txdp)
			vtx1(txdp, *tx_pkts, flags);

		vtx1(txdp, *tx_pkts++, rs);

		nb_commit = (uint16_t)(nb_commit - n);

		tx_id = 0;
		txq->tx_next_rs = (uint16_t)(txq->tx_rs_thresh - 1);

		/* avoid reach the end of ring */
		txdp = &txq->tx_ring[tx_id];
		txep = &txq->sw_ring_v[tx_id];
	}

	tx_backlog_entry(txep, tx_pkts, nb_commit);

	vtx(txdp, tx_pkts, nb_commit, flags);

	tx_id = (uint16_t)(tx_id + nb_commit);
	if (tx_id > txq->tx_next_rs) {
		txq->tx_ring[txq->tx_next_rs].read.cmd_type_len |=
			rte_cpu_to_le_32(IXGBE_ADVTXD_DCMD_RS);
		txq->tx_next_rs = (uint16_t)(txq->tx_next_rs +
			txq->tx_rs_thresh);
	}

	txq->tx_tail = tx_id;

	IXGBE_PCI_REG_WRITE(txq->tdt_reg_addr, txq->tx_tail);

	return nb_pkts;
}

static void __rte_cold
ixgbe_tx_queue_release_mbufs_vec(struct ixgbe_tx_queue *txq)
{
	_ixgbe_tx_queue_release_mbufs_vec(txq);
}

void __rte_cold
ixgbe_rx_queue_release_mbufs_vec(struct ixgbe_rx_queue *rxq)
{
	_ixgbe_rx_queue_release_mbufs_vec(rxq);
}

static void __rte_cold
ixgbe_tx_free_swring(struct ixgbe_tx_queue *txq)
{
	_ixgbe_tx_free_swring_vec(txq);
}

static void __rte_cold
ixgbe_reset_tx_queue(struct ixgbe_tx_queue *txq)
{
	_ixgbe_reset_tx_queue_vec(txq);
}

static const struct ixgbe_txq_ops vec_txq_ops = {
	.release_mbufs = ixgbe_tx_queue_release_mbufs_vec,
	.free_swring = ixgbe_tx_free_swring,
	.reset = ixgbe_reset_tx_queue,
};

int __rte_cold
ixgbe_rxq_vec_setup(struct ixgbe_rx_queue *rxq)
{
	return ixgbe_rxq_vec_setup_default(rxq);
}

int __rte_cold
ixgbe_txq_vec_setup(struct ixgbe_tx_queue *txq)
{
	return ixgbe_txq_vec_setup_default(txq, &vec_txq_ops);
}

int __rte_cold
ixgbe_rx_vec_dev_conf_condition_check(struct rte_eth_dev *dev)
{
	return ixgbe_rx_vec_dev_conf_condition_check_default(dev);
}