/* SPDX-License-Identifier: BSD-3-Clause
 * Copyright(c) 2020 Intel Corporation
 */

#include "iavf_rxtx_vec_common.h"

#include <x86intrin.h>

#ifndef __INTEL_COMPILER
#pragma GCC diagnostic ignored "-Wcast-qual"
#endif

#define IAVF_DESCS_PER_LOOP_AVX 8
#define PKTLEN_SHIFT 10

static inline void
iavf_rxq_rearm(struct iavf_rx_queue *rxq)
{
	int i;
	uint16_t rx_id;
	volatile union iavf_rx_desc *rxdp;
	struct rte_mempool_cache *cache =
		rte_mempool_default_cache(rxq->mp, rte_lcore_id());
	struct rte_mbuf **rxp = &rxq->sw_ring[rxq->rxrearm_start];

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

	/* We need to pull 'n' more MBUFs into the software ring from mempool
	 * We inline the mempool function here, so we can vectorize the copy
	 * from the cache into the shadow ring.
	 */

	/* Can this be satisfied from the cache? */
	if (cache->len < IAVF_RXQ_REARM_THRESH) {
		/* No. Backfill the cache first, and then fill from it */
		uint32_t req = IAVF_RXQ_REARM_THRESH + (cache->size -
							cache->len);

		/* How many do we require i.e. number to fill the cache + the request */
		int ret = rte_mempool_ops_dequeue_bulk
				(rxq->mp, &cache->objs[cache->len], req);
		if (ret == 0) {
			cache->len += req;
		} else {
			if (rxq->rxrearm_nb + IAVF_RXQ_REARM_THRESH >=
			    rxq->nb_rx_desc) {
				__m128i dma_addr0;

				dma_addr0 = _mm_setzero_si128();
				for (i = 0; i < IAVF_VPMD_DESCS_PER_LOOP; i++) {
					rxp[i] = &rxq->fake_mbuf;
					_mm_storeu_si128((__m128i *)&rxdp[i].read,
							 dma_addr0);
				}
			}
			rte_eth_devices[rxq->port_id].data->rx_mbuf_alloc_failed +=
					IAVF_RXQ_REARM_THRESH;
			return;
		}
	}

	const __m512i iova_offsets =  _mm512_set1_epi64(offsetof
							(struct rte_mbuf, buf_iova));
	const __m512i headroom = _mm512_set1_epi64(RTE_PKTMBUF_HEADROOM);

#ifndef RTE_LIBRTE_IAVF_16BYTE_RX_DESC
	/* to shuffle the addresses to correct slots. Values 4-7 will contain
	 * zeros, so use 7 for a zero-value.
	 */
	const __m512i permute_idx = _mm512_set_epi64(7, 7, 3, 1, 7, 7, 2, 0);
#else
	const __m512i permute_idx = _mm512_set_epi64(7, 3, 6, 2, 5, 1, 4, 0);
#endif

	/* Initialize the mbufs in vector, process 8 mbufs in one loop, taking
	 * from mempool cache and populating both shadow and HW rings
	 */
	for (i = 0; i < IAVF_RXQ_REARM_THRESH / IAVF_DESCS_PER_LOOP_AVX; i++) {
		const __m512i mbuf_ptrs = _mm512_loadu_si512
			(&cache->objs[cache->len - IAVF_DESCS_PER_LOOP_AVX]);
		_mm512_storeu_si512(rxp, mbuf_ptrs);

		const __m512i iova_base_addrs = _mm512_i64gather_epi64
				(_mm512_add_epi64(mbuf_ptrs, iova_offsets),
				 0, /* base */
				 1  /* scale */);
		const __m512i iova_addrs = _mm512_add_epi64(iova_base_addrs,
				headroom);
#ifndef RTE_LIBRTE_IAVF_16BYTE_RX_DESC
		const __m512i iovas0 = _mm512_castsi256_si512
				(_mm512_extracti64x4_epi64(iova_addrs, 0));
		const __m512i iovas1 = _mm512_castsi256_si512
				(_mm512_extracti64x4_epi64(iova_addrs, 1));

		/* permute leaves desc 2-3 addresses in header address slots 0-1
		 * but these are ignored by driver since header split not
		 * enabled. Similarly for desc 6 & 7.
		 */
		const __m512i desc0_1 = _mm512_permutexvar_epi64
				(permute_idx,
				 iovas0);
		const __m512i desc2_3 = _mm512_bsrli_epi128(desc0_1, 8);

		const __m512i desc4_5 = _mm512_permutexvar_epi64
				(permute_idx,
				 iovas1);
		const __m512i desc6_7 = _mm512_bsrli_epi128(desc4_5, 8);

		_mm512_storeu_si512((void *)rxdp, desc0_1);
		_mm512_storeu_si512((void *)(rxdp + 2), desc2_3);
		_mm512_storeu_si512((void *)(rxdp + 4), desc4_5);
		_mm512_storeu_si512((void *)(rxdp + 6), desc6_7);
#else
		/* permute leaves desc 4-7 addresses in header address slots 0-3
		 * but these are ignored by driver since header split not
		 * enabled.
		 */
		const __m512i desc0_3 = _mm512_permutexvar_epi64(permute_idx,
								 iova_addrs);
		const __m512i desc4_7 = _mm512_bsrli_epi128(desc0_3, 8);

		_mm512_storeu_si512((void *)rxdp, desc0_3);
		_mm512_storeu_si512((void *)(rxdp + 4), desc4_7);
#endif
		rxp += IAVF_DESCS_PER_LOOP_AVX;
		rxdp += IAVF_DESCS_PER_LOOP_AVX;
		cache->len -= IAVF_DESCS_PER_LOOP_AVX;
	}

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

	rxq->rxrearm_nb -= IAVF_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 */
	IAVF_PCI_REG_WRITE(rxq->qrx_tail, rx_id);
}

#define IAVF_RX_LEN_MASK 0x80808080
static inline uint16_t
_iavf_recv_raw_pkts_vec_avx512(struct iavf_rx_queue *rxq,
			       struct rte_mbuf **rx_pkts,
			       uint16_t nb_pkts, uint8_t *split_packet)
{
	const uint32_t *type_table = rxq->vsi->adapter->ptype_tbl;

	const __m256i mbuf_init = _mm256_set_epi64x(0, 0, 0,
						    rxq->mbuf_initializer);
	struct rte_mbuf **sw_ring = &rxq->sw_ring[rxq->rx_tail];
	volatile union iavf_rx_desc *rxdp = rxq->rx_ring + rxq->rx_tail;

	rte_prefetch0(rxdp);

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

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

	/* Before we start moving massive data around, check to see if
	 * there is actually a packet available
	 */
	if (!(rxdp->wb.qword1.status_error_len &
	      rte_cpu_to_le_32(1 << IAVF_RX_DESC_STATUS_DD_SHIFT)))
		return 0;

	/* constants used in processing loop */
	const __m512i crc_adjust =
		_mm512_set_epi32
			(/* 1st descriptor */
			 0,             /* ignore non-length fields */
			 -rxq->crc_len, /* sub crc on data_len */
			 -rxq->crc_len, /* sub crc on pkt_len */
			 0,             /* ignore pkt_type field */
			 /* 2nd descriptor */
			 0,             /* ignore non-length fields */
			 -rxq->crc_len, /* sub crc on data_len */
			 -rxq->crc_len, /* sub crc on pkt_len */
			 0,             /* ignore pkt_type field */
			 /* 3rd descriptor */
			 0,             /* ignore non-length fields */
			 -rxq->crc_len, /* sub crc on data_len */
			 -rxq->crc_len, /* sub crc on pkt_len */
			 0,             /* ignore pkt_type field */
			 /* 4th descriptor */
			 0,             /* ignore non-length fields */
			 -rxq->crc_len, /* sub crc on data_len */
			 -rxq->crc_len, /* sub crc on pkt_len */
			 0              /* ignore pkt_type field */
			);

	/* 8 packets DD mask, LSB in each 32-bit value */
	const __m256i dd_check = _mm256_set1_epi32(1);

	/* 8 packets EOP mask, second-LSB in each 32-bit value */
	const __m256i eop_check = _mm256_slli_epi32(dd_check,
			IAVF_RX_DESC_STATUS_EOF_SHIFT);

	/* mask to shuffle from desc. to mbuf (4 descriptors)*/
	const __m512i shuf_msk =
		_mm512_set_epi32
			(/* 1st descriptor */
			 0x07060504,    /* octet 4~7, 32bits rss */
			 0x03020F0E,    /* octet 2~3, low 16 bits vlan_macip */
					/* octet 15~14, 16 bits data_len */
			 0xFFFF0F0E,    /* skip high 16 bits pkt_len, zero out */
					/* octet 15~14, low 16 bits pkt_len */
			 0xFFFFFFFF,    /* pkt_type set as unknown */
			 /* 2nd descriptor */
			 0x07060504,    /* octet 4~7, 32bits rss */
			 0x03020F0E,    /* octet 2~3, low 16 bits vlan_macip */
					/* octet 15~14, 16 bits data_len */
			 0xFFFF0F0E,    /* skip high 16 bits pkt_len, zero out */
					/* octet 15~14, low 16 bits pkt_len */
			 0xFFFFFFFF,    /* pkt_type set as unknown */
			 /* 3rd descriptor */
			 0x07060504,    /* octet 4~7, 32bits rss */
			 0x03020F0E,    /* octet 2~3, low 16 bits vlan_macip */
					/* octet 15~14, 16 bits data_len */
			 0xFFFF0F0E,    /* skip high 16 bits pkt_len, zero out */
					/* octet 15~14, low 16 bits pkt_len */
			 0xFFFFFFFF,    /* pkt_type set as unknown */
			 /* 4th descriptor */
			 0x07060504,    /* octet 4~7, 32bits rss */
			 0x03020F0E,    /* octet 2~3, low 16 bits vlan_macip */
					/* octet 15~14, 16 bits data_len */
			 0xFFFF0F0E,    /* skip high 16 bits pkt_len, zero out */
					/* octet 15~14, low 16 bits pkt_len */
			 0xFFFFFFFF     /* pkt_type set as unknown */
			);
	/**
	 * compile-time check the above crc and shuffle layout is correct.
	 * NOTE: the first field (lowest address) is given last in set_epi
	 * calls above.
	 */
	RTE_BUILD_BUG_ON(offsetof(struct rte_mbuf, pkt_len) !=
			 offsetof(struct rte_mbuf, rx_descriptor_fields1) + 4);
	RTE_BUILD_BUG_ON(offsetof(struct rte_mbuf, data_len) !=
			 offsetof(struct rte_mbuf, rx_descriptor_fields1) + 8);
	RTE_BUILD_BUG_ON(offsetof(struct rte_mbuf, vlan_tci) !=
			 offsetof(struct rte_mbuf, rx_descriptor_fields1) + 10);
	RTE_BUILD_BUG_ON(offsetof(struct rte_mbuf, hash) !=
			 offsetof(struct rte_mbuf, rx_descriptor_fields1) + 12);

	/* Status/Error flag masks */
	/**
	 * mask everything except RSS, flow director and VLAN flags
	 * bit2 is for VLAN tag, bit11 for flow director indication
	 * bit13:12 for RSS indication. Bits 3-5 of error
	 * field (bits 22-24) are for IP/L4 checksum errors
	 */
	const __m256i flags_mask =
		_mm256_set1_epi32((1 << 2) | (1 << 11) |
				  (3 << 12) | (7 << 22));
	/**
	 * data to be shuffled by result of flag mask. If VLAN bit is set,
	 * (bit 2), then position 4 in this array will be used in the
	 * destination
	 */
	const __m256i vlan_flags_shuf =
		_mm256_set_epi32(0, 0, PKT_RX_VLAN | PKT_RX_VLAN_STRIPPED, 0,
				 0, 0, PKT_RX_VLAN | PKT_RX_VLAN_STRIPPED, 0);
	/**
	 * data to be shuffled by result of flag mask, shifted down 11.
	 * If RSS/FDIR bits are set, shuffle moves appropriate flags in
	 * place.
	 */
	const __m256i rss_flags_shuf =
		_mm256_set_epi8(0, 0, 0, 0, 0, 0, 0, 0,
				PKT_RX_RSS_HASH | PKT_RX_FDIR, PKT_RX_RSS_HASH,
				0, 0, 0, 0, PKT_RX_FDIR, 0,/* end up 128-bits */
				0, 0, 0, 0, 0, 0, 0, 0,
				PKT_RX_RSS_HASH | PKT_RX_FDIR, PKT_RX_RSS_HASH,
				0, 0, 0, 0, PKT_RX_FDIR, 0);

	/**
	 * data to be shuffled by the result of the flags mask shifted by 22
	 * bits.  This gives use the l3_l4 flags.
	 */
	const __m256i l3_l4_flags_shuf = _mm256_set_epi8(0, 0, 0, 0, 0, 0, 0, 0,
			/* shift right 1 bit to make sure it not exceed 255 */
			(PKT_RX_EIP_CKSUM_BAD | PKT_RX_L4_CKSUM_BAD |
			 PKT_RX_IP_CKSUM_BAD) >> 1,
			(PKT_RX_IP_CKSUM_GOOD | PKT_RX_EIP_CKSUM_BAD |
			 PKT_RX_L4_CKSUM_BAD) >> 1,
			(PKT_RX_EIP_CKSUM_BAD | PKT_RX_IP_CKSUM_BAD) >> 1,
			(PKT_RX_IP_CKSUM_GOOD | PKT_RX_EIP_CKSUM_BAD) >> 1,
			(PKT_RX_L4_CKSUM_BAD | PKT_RX_IP_CKSUM_BAD) >> 1,
			(PKT_RX_IP_CKSUM_GOOD | PKT_RX_L4_CKSUM_BAD) >> 1,
			PKT_RX_IP_CKSUM_BAD >> 1,
			(PKT_RX_IP_CKSUM_GOOD | PKT_RX_L4_CKSUM_GOOD) >> 1,
			/* second 128-bits */
			0, 0, 0, 0, 0, 0, 0, 0,
			(PKT_RX_EIP_CKSUM_BAD | PKT_RX_L4_CKSUM_BAD |
			 PKT_RX_IP_CKSUM_BAD) >> 1,
			(PKT_RX_IP_CKSUM_GOOD | PKT_RX_EIP_CKSUM_BAD |
			 PKT_RX_L4_CKSUM_BAD) >> 1,
			(PKT_RX_EIP_CKSUM_BAD | PKT_RX_IP_CKSUM_BAD) >> 1,
			(PKT_RX_IP_CKSUM_GOOD | PKT_RX_EIP_CKSUM_BAD) >> 1,
			(PKT_RX_L4_CKSUM_BAD | PKT_RX_IP_CKSUM_BAD) >> 1,
			(PKT_RX_IP_CKSUM_GOOD | PKT_RX_L4_CKSUM_BAD) >> 1,
			PKT_RX_IP_CKSUM_BAD >> 1,
			(PKT_RX_IP_CKSUM_GOOD | PKT_RX_L4_CKSUM_GOOD) >> 1);

	const __m256i cksum_mask =
		_mm256_set1_epi32(PKT_RX_IP_CKSUM_GOOD | PKT_RX_IP_CKSUM_BAD |
				  PKT_RX_L4_CKSUM_GOOD | PKT_RX_L4_CKSUM_BAD |
				  PKT_RX_EIP_CKSUM_BAD);

	uint16_t i, received;

	for (i = 0, received = 0; i < nb_pkts;
	     i += IAVF_DESCS_PER_LOOP_AVX,
	     rxdp += IAVF_DESCS_PER_LOOP_AVX) {
		/* step 1, copy over 8 mbuf pointers to rx_pkts array */
		_mm256_storeu_si256((void *)&rx_pkts[i],
				    _mm256_loadu_si256((void *)&sw_ring[i]));
#ifdef RTE_ARCH_X86_64
		_mm256_storeu_si256
			((void *)&rx_pkts[i + 4],
			 _mm256_loadu_si256((void *)&sw_ring[i + 4]));
#endif

		__m512i raw_desc0_3, raw_desc4_7;
		const __m128i raw_desc7 =
			_mm_load_si128((void *)(rxdp + 7));
		rte_compiler_barrier();
		const __m128i raw_desc6 =
			_mm_load_si128((void *)(rxdp + 6));
		rte_compiler_barrier();
		const __m128i raw_desc5 =
			_mm_load_si128((void *)(rxdp + 5));
		rte_compiler_barrier();
		const __m128i raw_desc4 =
			_mm_load_si128((void *)(rxdp + 4));
		rte_compiler_barrier();
		const __m128i raw_desc3 =
			_mm_load_si128((void *)(rxdp + 3));
		rte_compiler_barrier();
		const __m128i raw_desc2 =
			_mm_load_si128((void *)(rxdp + 2));
		rte_compiler_barrier();
		const __m128i raw_desc1 =
			_mm_load_si128((void *)(rxdp + 1));
		rte_compiler_barrier();
		const __m128i raw_desc0 =
			_mm_load_si128((void *)(rxdp + 0));

		raw_desc4_7 = _mm512_broadcast_i32x4(raw_desc4);
		raw_desc4_7 = _mm512_inserti32x4(raw_desc4_7, raw_desc5, 1);
		raw_desc4_7 = _mm512_inserti32x4(raw_desc4_7, raw_desc6, 2);
		raw_desc4_7 = _mm512_inserti32x4(raw_desc4_7, raw_desc7, 3);
		raw_desc0_3 = _mm512_broadcast_i32x4(raw_desc0);
		raw_desc0_3 = _mm512_inserti32x4(raw_desc0_3, raw_desc1, 1);
		raw_desc0_3 = _mm512_inserti32x4(raw_desc0_3, raw_desc2, 2);
		raw_desc0_3 = _mm512_inserti32x4(raw_desc0_3, raw_desc3, 3);

		if (split_packet) {
			int j;

			for (j = 0; j < IAVF_DESCS_PER_LOOP_AVX; j++)
				rte_mbuf_prefetch_part2(rx_pkts[i + j]);
		}

		/**
		 * convert descriptors 4-7 into mbufs, adjusting length and
		 * re-arranging fields. Then write into the mbuf
		 */
		const __m512i len4_7 = _mm512_slli_epi32(raw_desc4_7,
							 PKTLEN_SHIFT);
		const __m512i desc4_7 = _mm512_mask_blend_epi16(IAVF_RX_LEN_MASK,
								raw_desc4_7,
								len4_7);
		__m512i mb4_7 = _mm512_shuffle_epi8(desc4_7, shuf_msk);

		mb4_7 = _mm512_add_epi16(mb4_7, crc_adjust);
		/**
		 * to get packet types, shift 64-bit values down 30 bits
		 * and so ptype is in lower 8-bits in each
		 */
		const __m512i ptypes4_7 = _mm512_srli_epi64(desc4_7, 30);
		const __m256i ptypes6_7 = _mm512_extracti64x4_epi64(ptypes4_7, 1);
		const __m256i ptypes4_5 = _mm512_extracti64x4_epi64(ptypes4_7, 0);
		const uint8_t ptype7 = _mm256_extract_epi8(ptypes6_7, 24);
		const uint8_t ptype6 = _mm256_extract_epi8(ptypes6_7, 8);
		const uint8_t ptype5 = _mm256_extract_epi8(ptypes4_5, 24);
		const uint8_t ptype4 = _mm256_extract_epi8(ptypes4_5, 8);

		const __m512i ptype4_7 = _mm512_set_epi32
			(0, 0, 0, type_table[ptype7],
			 0, 0, 0, type_table[ptype6],
			 0, 0, 0, type_table[ptype5],
			 0, 0, 0, type_table[ptype4]);
		mb4_7 = _mm512_mask_blend_epi32(0x1111, mb4_7, ptype4_7);

		/**
		 * convert descriptors 0-3 into mbufs, adjusting length and
		 * re-arranging fields. Then write into the mbuf
		 */
		const __m512i len0_3 = _mm512_slli_epi32(raw_desc0_3,
							 PKTLEN_SHIFT);
		const __m512i desc0_3 = _mm512_mask_blend_epi16(IAVF_RX_LEN_MASK,
								raw_desc0_3,
								len0_3);
		__m512i mb0_3 = _mm512_shuffle_epi8(desc0_3, shuf_msk);

		mb0_3 = _mm512_add_epi16(mb0_3, crc_adjust);
		/* get the packet types */
		const __m512i ptypes0_3 = _mm512_srli_epi64(desc0_3, 30);
		const __m256i ptypes2_3 = _mm512_extracti64x4_epi64(ptypes0_3, 1);
		const __m256i ptypes0_1 = _mm512_extracti64x4_epi64(ptypes0_3, 0);
		const uint8_t ptype3 = _mm256_extract_epi8(ptypes2_3, 24);
		const uint8_t ptype2 = _mm256_extract_epi8(ptypes2_3, 8);
		const uint8_t ptype1 = _mm256_extract_epi8(ptypes0_1, 24);
		const uint8_t ptype0 = _mm256_extract_epi8(ptypes0_1, 8);

		const __m512i ptype0_3 = _mm512_set_epi32
			(0, 0, 0, type_table[ptype3],
			 0, 0, 0, type_table[ptype2],
			 0, 0, 0, type_table[ptype1],
			 0, 0, 0, type_table[ptype0]);
		mb0_3 = _mm512_mask_blend_epi32(0x1111, mb0_3, ptype0_3);

		/**
		 * use permute/extract to get status content
		 * After the operations, the packets status flags are in the
		 * order (hi->lo): [1, 3, 5, 7, 0, 2, 4, 6]
		 */
		/* merge the status bits into one register */
		const __m512i status_permute_msk = _mm512_set_epi32
			(0, 0, 0, 0,
			 0, 0, 0, 0,
			 22, 30, 6, 14,
			 18, 26, 2, 10);
		const __m512i raw_status0_7 = _mm512_permutex2var_epi32
			(raw_desc4_7, status_permute_msk, raw_desc0_3);
		__m256i status0_7 = _mm512_extracti64x4_epi64
			(raw_status0_7, 0);

		/* now do flag manipulation */

		/* get only flag/error bits we want */
		const __m256i flag_bits =
			_mm256_and_si256(status0_7, flags_mask);
		/* set vlan and rss flags */
		const __m256i vlan_flags =
			_mm256_shuffle_epi8(vlan_flags_shuf, flag_bits);
		const __m256i rss_flags =
			_mm256_shuffle_epi8(rss_flags_shuf,
					    _mm256_srli_epi32(flag_bits, 11));
		/**
		 * l3_l4_error flags, shuffle, then shift to correct adjustment
		 * of flags in flags_shuf, and finally mask out extra bits
		 */
		__m256i l3_l4_flags = _mm256_shuffle_epi8(l3_l4_flags_shuf,
						_mm256_srli_epi32(flag_bits, 22));
		l3_l4_flags = _mm256_slli_epi32(l3_l4_flags, 1);
		l3_l4_flags = _mm256_and_si256(l3_l4_flags, cksum_mask);

		/* merge flags */
		const __m256i mbuf_flags = _mm256_or_si256(l3_l4_flags,
				_mm256_or_si256(rss_flags, vlan_flags));
		/**
		 * At this point, we have the 8 sets of flags in the low 16-bits
		 * of each 32-bit value in vlan0.
		 * We want to extract these, and merge them with the mbuf init
		 * data so we can do a single write to the mbuf to set the flags
		 * and all the other initialization fields. Extracting the
		 * appropriate flags means that we have to do a shift and blend
		 * for each mbuf before we do the write. However, we can also
		 * add in the previously computed rx_descriptor fields to
		 * make a single 256-bit write per mbuf
		 */
		/* check the structure matches expectations */
		RTE_BUILD_BUG_ON(offsetof(struct rte_mbuf, ol_flags) !=
				 offsetof(struct rte_mbuf, rearm_data) + 8);
		RTE_BUILD_BUG_ON(offsetof(struct rte_mbuf, rearm_data) !=
				 RTE_ALIGN(offsetof(struct rte_mbuf,
						    rearm_data),
					   16));
		/* build up data and do writes */
		__m256i rearm0, rearm1, rearm2, rearm3, rearm4, rearm5,
			rearm6, rearm7;
		const __m256i mb4_5 = _mm512_extracti64x4_epi64(mb4_7, 0);
		const __m256i mb6_7 = _mm512_extracti64x4_epi64(mb4_7, 1);
		const __m256i mb0_1 = _mm512_extracti64x4_epi64(mb0_3, 0);
		const __m256i mb2_3 = _mm512_extracti64x4_epi64(mb0_3, 1);

		rearm6 = _mm256_blend_epi32(mbuf_init,
					    _mm256_slli_si256(mbuf_flags, 8),
					    0x04);
		rearm4 = _mm256_blend_epi32(mbuf_init,
					    _mm256_slli_si256(mbuf_flags, 4),
					    0x04);
		rearm2 = _mm256_blend_epi32(mbuf_init, mbuf_flags, 0x04);
		rearm0 = _mm256_blend_epi32(mbuf_init,
					    _mm256_srli_si256(mbuf_flags, 4),
					    0x04);
		/* permute to add in the rx_descriptor e.g. rss fields */
		rearm6 = _mm256_permute2f128_si256(rearm6, mb6_7, 0x20);
		rearm4 = _mm256_permute2f128_si256(rearm4, mb4_5, 0x20);
		rearm2 = _mm256_permute2f128_si256(rearm2, mb2_3, 0x20);
		rearm0 = _mm256_permute2f128_si256(rearm0, mb0_1, 0x20);
		/* write to mbuf */
		_mm256_storeu_si256((__m256i *)&rx_pkts[i + 6]->rearm_data,
				    rearm6);
		_mm256_storeu_si256((__m256i *)&rx_pkts[i + 4]->rearm_data,
				    rearm4);
		_mm256_storeu_si256((__m256i *)&rx_pkts[i + 2]->rearm_data,
				    rearm2);
		_mm256_storeu_si256((__m256i *)&rx_pkts[i + 0]->rearm_data,
				    rearm0);

		/* repeat for the odd mbufs */
		const __m256i odd_flags =
			_mm256_castsi128_si256
				(_mm256_extracti128_si256(mbuf_flags, 1));
		rearm7 = _mm256_blend_epi32(mbuf_init,
					    _mm256_slli_si256(odd_flags, 8),
					    0x04);
		rearm5 = _mm256_blend_epi32(mbuf_init,
					    _mm256_slli_si256(odd_flags, 4),
					    0x04);
		rearm3 = _mm256_blend_epi32(mbuf_init, odd_flags, 0x04);
		rearm1 = _mm256_blend_epi32(mbuf_init,
					    _mm256_srli_si256(odd_flags, 4),
					    0x04);
		/* since odd mbufs are already in hi 128-bits use blend */
		rearm7 = _mm256_blend_epi32(rearm7, mb6_7, 0xF0);
		rearm5 = _mm256_blend_epi32(rearm5, mb4_5, 0xF0);
		rearm3 = _mm256_blend_epi32(rearm3, mb2_3, 0xF0);
		rearm1 = _mm256_blend_epi32(rearm1, mb0_1, 0xF0);
		/* again write to mbufs */
		_mm256_storeu_si256((__m256i *)&rx_pkts[i + 7]->rearm_data,
				    rearm7);
		_mm256_storeu_si256((__m256i *)&rx_pkts[i + 5]->rearm_data,
				    rearm5);
		_mm256_storeu_si256((__m256i *)&rx_pkts[i + 3]->rearm_data,
				    rearm3);
		_mm256_storeu_si256((__m256i *)&rx_pkts[i + 1]->rearm_data,
				    rearm1);

		/* extract and record EOP bit */
		if (split_packet) {
			const __m128i eop_mask =
				_mm_set1_epi16(1 << IAVF_RX_DESC_STATUS_EOF_SHIFT);
			const __m256i eop_bits256 = _mm256_and_si256(status0_7,
								     eop_check);
			/* pack status bits into a single 128-bit register */
			const __m128i eop_bits =
				_mm_packus_epi32
					(_mm256_castsi256_si128(eop_bits256),
					 _mm256_extractf128_si256(eop_bits256,
								  1));
			/**
			 * flip bits, and mask out the EOP bit, which is now
			 * a split-packet bit i.e. !EOP, rather than EOP one.
			 */
			__m128i split_bits = _mm_andnot_si128(eop_bits,
							      eop_mask);
			/**
			 * eop bits are out of order, so we need to shuffle them
			 * back into order again. In doing so, only use low 8
			 * bits, which acts like another pack instruction
			 * The original order is (hi->lo): 1,3,5,7,0,2,4,6
			 * [Since we use epi8, the 16-bit positions are
			 * multiplied by 2 in the eop_shuffle value.]
			 */
			__m128i eop_shuffle =
				_mm_set_epi8(/* zero hi 64b */
					     0xFF, 0xFF, 0xFF, 0xFF,
					     0xFF, 0xFF, 0xFF, 0xFF,
					     /* move values to lo 64b */
					     8, 0, 10, 2,
					     12, 4, 14, 6);
			split_bits = _mm_shuffle_epi8(split_bits, eop_shuffle);
			*(uint64_t *)split_packet =
				_mm_cvtsi128_si64(split_bits);
			split_packet += IAVF_DESCS_PER_LOOP_AVX;
		}

		/* perform dd_check */
		status0_7 = _mm256_and_si256(status0_7, dd_check);
		status0_7 = _mm256_packs_epi32(status0_7,
					       _mm256_setzero_si256());

		uint64_t burst = __builtin_popcountll
					(_mm_cvtsi128_si64
						(_mm256_extracti128_si256
							(status0_7, 1)));
		burst += __builtin_popcountll
				(_mm_cvtsi128_si64
					(_mm256_castsi256_si128(status0_7)));
		received += burst;
		if (burst != IAVF_DESCS_PER_LOOP_AVX)
			break;
	}

	/* update tail pointers */
	rxq->rx_tail += received;
	rxq->rx_tail &= (rxq->nb_rx_desc - 1);
	if ((rxq->rx_tail & 1) == 1 && received > 1) { /* keep aligned */
		rxq->rx_tail--;
		received--;
	}
	rxq->rxrearm_nb += received;
	return received;
}

static inline __m256i
flex_rxd_to_fdir_flags_vec_avx512(const __m256i fdir_id0_7)
{
#define FDID_MIS_MAGIC 0xFFFFFFFF
	RTE_BUILD_BUG_ON(PKT_RX_FDIR != (1 << 2));
	RTE_BUILD_BUG_ON(PKT_RX_FDIR_ID != (1 << 13));
	const __m256i pkt_fdir_bit = _mm256_set1_epi32(PKT_RX_FDIR |
						       PKT_RX_FDIR_ID);
	/* desc->flow_id field == 0xFFFFFFFF means fdir mismatch */
	const __m256i fdir_mis_mask = _mm256_set1_epi32(FDID_MIS_MAGIC);
	__m256i fdir_mask = _mm256_cmpeq_epi32(fdir_id0_7,
					       fdir_mis_mask);
	/* this XOR op results to bit-reverse the fdir_mask */
	fdir_mask = _mm256_xor_si256(fdir_mask, fdir_mis_mask);
	const __m256i fdir_flags = _mm256_and_si256(fdir_mask, pkt_fdir_bit);

	return fdir_flags;
}

static inline uint16_t
_iavf_recv_raw_pkts_vec_avx512_flex_rxd(struct iavf_rx_queue *rxq,
					struct rte_mbuf **rx_pkts,
					uint16_t nb_pkts, uint8_t *split_packet)
{
	const uint32_t *type_table = rxq->vsi->adapter->ptype_tbl;

	const __m256i mbuf_init = _mm256_set_epi64x(0, 0, 0,
						    rxq->mbuf_initializer);
	struct rte_mbuf **sw_ring = &rxq->sw_ring[rxq->rx_tail];
	volatile union iavf_rx_flex_desc *rxdp =
		(union iavf_rx_flex_desc *)rxq->rx_ring + rxq->rx_tail;

	rte_prefetch0(rxdp);

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

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

	/* Before we start moving massive data around, check to see if
	 * there is actually a packet available
	 */
	if (!(rxdp->wb.status_error0 &
	      rte_cpu_to_le_32(1 << IAVF_RX_FLEX_DESC_STATUS0_DD_S)))
		return 0;

	/* constants used in processing loop */
	const __m512i crc_adjust =
		_mm512_set_epi32
			(/* 1st descriptor */
			 0,             /* ignore non-length fields */
			 -rxq->crc_len, /* sub crc on data_len */
			 -rxq->crc_len, /* sub crc on pkt_len */
			 0,             /* ignore pkt_type field */
			 /* 2nd descriptor */
			 0,             /* ignore non-length fields */
			 -rxq->crc_len, /* sub crc on data_len */
			 -rxq->crc_len, /* sub crc on pkt_len */
			 0,             /* ignore pkt_type field */
			 /* 3rd descriptor */
			 0,             /* ignore non-length fields */
			 -rxq->crc_len, /* sub crc on data_len */
			 -rxq->crc_len, /* sub crc on pkt_len */
			 0,             /* ignore pkt_type field */
			 /* 4th descriptor */
			 0,             /* ignore non-length fields */
			 -rxq->crc_len, /* sub crc on data_len */
			 -rxq->crc_len, /* sub crc on pkt_len */
			 0              /* ignore pkt_type field */
			);

	/* 8 packets DD mask, LSB in each 32-bit value */
	const __m256i dd_check = _mm256_set1_epi32(1);

	/* 8 packets EOP mask, second-LSB in each 32-bit value */
	const __m256i eop_check = _mm256_slli_epi32(dd_check,
			IAVF_RX_FLEX_DESC_STATUS0_EOF_S);

	/* mask to shuffle from desc. to mbuf (4 descriptors)*/
	const __m512i shuf_msk =
		_mm512_set_epi32
			(/* 1st descriptor */
			 0xFFFFFFFF,    /* rss hash parsed separately */
			 0x0B0A0504,    /* octet 10~11, 16 bits vlan_macip */
					/* octet 4~5, 16 bits data_len */
			 0xFFFF0504,    /* skip hi 16 bits pkt_len, zero out */
					/* octet 4~5, 16 bits pkt_len */
			 0xFFFFFFFF,    /* pkt_type set as unknown */
			 /* 2nd descriptor */
			 0xFFFFFFFF,    /* rss hash parsed separately */
			 0x0B0A0504,    /* octet 10~11, 16 bits vlan_macip */
					/* octet 4~5, 16 bits data_len */
			 0xFFFF0504,    /* skip hi 16 bits pkt_len, zero out */
					/* octet 4~5, 16 bits pkt_len */
			 0xFFFFFFFF,    /* pkt_type set as unknown */
			 /* 3rd descriptor */
			 0xFFFFFFFF,    /* rss hash parsed separately */
			 0x0B0A0504,    /* octet 10~11, 16 bits vlan_macip */
					/* octet 4~5, 16 bits data_len */
			 0xFFFF0504,    /* skip hi 16 bits pkt_len, zero out */
					/* octet 4~5, 16 bits pkt_len */
			 0xFFFFFFFF,    /* pkt_type set as unknown */
			 /* 4th descriptor */
			 0xFFFFFFFF,    /* rss hash parsed separately */
			 0x0B0A0504,    /* octet 10~11, 16 bits vlan_macip */
					/* octet 4~5, 16 bits data_len */
			 0xFFFF0504,    /* skip hi 16 bits pkt_len, zero out */
					/* octet 4~5, 16 bits pkt_len */
			 0xFFFFFFFF     /* pkt_type set as unknown */
			);
	/**
	 * compile-time check the above crc and shuffle layout is correct.
	 * NOTE: the first field (lowest address) is given last in set_epi
	 * calls above.
	 */
	RTE_BUILD_BUG_ON(offsetof(struct rte_mbuf, pkt_len) !=
			 offsetof(struct rte_mbuf, rx_descriptor_fields1) + 4);
	RTE_BUILD_BUG_ON(offsetof(struct rte_mbuf, data_len) !=
			 offsetof(struct rte_mbuf, rx_descriptor_fields1) + 8);
	RTE_BUILD_BUG_ON(offsetof(struct rte_mbuf, vlan_tci) !=
			 offsetof(struct rte_mbuf, rx_descriptor_fields1) + 10);
	RTE_BUILD_BUG_ON(offsetof(struct rte_mbuf, hash) !=
			 offsetof(struct rte_mbuf, rx_descriptor_fields1) + 12);

	/* Status/Error flag masks */
	/**
	 * mask everything except Checksum Reports, RSS indication
	 * and VLAN indication.
	 * bit6:4 for IP/L4 checksum errors.
	 * bit12 is for RSS indication.
	 * bit13 is for VLAN indication.
	 */
	const __m256i flags_mask =
		_mm256_set1_epi32((7 << 4) | (1 << 12) | (1 << 13));
	/**
	 * data to be shuffled by the result of the flags mask shifted by 4
	 * bits.  This gives use the l3_l4 flags.
	 */
	const __m256i l3_l4_flags_shuf = _mm256_set_epi8(0, 0, 0, 0, 0, 0, 0, 0,
			/* shift right 1 bit to make sure it not exceed 255 */
			(PKT_RX_EIP_CKSUM_BAD | PKT_RX_L4_CKSUM_BAD |
			 PKT_RX_IP_CKSUM_BAD) >> 1,
			(PKT_RX_EIP_CKSUM_BAD | PKT_RX_L4_CKSUM_BAD |
			 PKT_RX_IP_CKSUM_GOOD) >> 1,
			(PKT_RX_EIP_CKSUM_BAD | PKT_RX_L4_CKSUM_GOOD |
			 PKT_RX_IP_CKSUM_BAD) >> 1,
			(PKT_RX_EIP_CKSUM_BAD | PKT_RX_L4_CKSUM_GOOD |
			 PKT_RX_IP_CKSUM_GOOD) >> 1,
			(PKT_RX_L4_CKSUM_BAD | PKT_RX_IP_CKSUM_BAD) >> 1,
			(PKT_RX_L4_CKSUM_BAD | PKT_RX_IP_CKSUM_GOOD) >> 1,
			(PKT_RX_L4_CKSUM_GOOD | PKT_RX_IP_CKSUM_BAD) >> 1,
			(PKT_RX_L4_CKSUM_GOOD | PKT_RX_IP_CKSUM_GOOD) >> 1,
			/* second 128-bits */
			0, 0, 0, 0, 0, 0, 0, 0,
			(PKT_RX_EIP_CKSUM_BAD | PKT_RX_L4_CKSUM_BAD |
			 PKT_RX_IP_CKSUM_BAD) >> 1,
			(PKT_RX_EIP_CKSUM_BAD | PKT_RX_L4_CKSUM_BAD |
			 PKT_RX_IP_CKSUM_GOOD) >> 1,
			(PKT_RX_EIP_CKSUM_BAD | PKT_RX_L4_CKSUM_GOOD |
			 PKT_RX_IP_CKSUM_BAD) >> 1,
			(PKT_RX_EIP_CKSUM_BAD | PKT_RX_L4_CKSUM_GOOD |
			 PKT_RX_IP_CKSUM_GOOD) >> 1,
			(PKT_RX_L4_CKSUM_BAD | PKT_RX_IP_CKSUM_BAD) >> 1,
			(PKT_RX_L4_CKSUM_BAD | PKT_RX_IP_CKSUM_GOOD) >> 1,
			(PKT_RX_L4_CKSUM_GOOD | PKT_RX_IP_CKSUM_BAD) >> 1,
			(PKT_RX_L4_CKSUM_GOOD | PKT_RX_IP_CKSUM_GOOD) >> 1);
	const __m256i cksum_mask =
		_mm256_set1_epi32(PKT_RX_IP_CKSUM_GOOD | PKT_RX_IP_CKSUM_BAD |
				  PKT_RX_L4_CKSUM_GOOD | PKT_RX_L4_CKSUM_BAD |
				  PKT_RX_EIP_CKSUM_BAD);
	/**
	 * data to be shuffled by result of flag mask, shifted down 12.
	 * If RSS(bit12)/VLAN(bit13) are set,
	 * shuffle moves appropriate flags in place.
	 */
	const __m256i rss_vlan_flags_shuf = _mm256_set_epi8(0, 0, 0, 0,
			0, 0, 0, 0,
			0, 0, 0, 0,
			PKT_RX_RSS_HASH | PKT_RX_VLAN | PKT_RX_VLAN_STRIPPED,
			PKT_RX_VLAN | PKT_RX_VLAN_STRIPPED,
			PKT_RX_RSS_HASH, 0,
			/* end up 128-bits */
			0, 0, 0, 0,
			0, 0, 0, 0,
			0, 0, 0, 0,
			PKT_RX_RSS_HASH | PKT_RX_VLAN | PKT_RX_VLAN_STRIPPED,
			PKT_RX_VLAN | PKT_RX_VLAN_STRIPPED,
			PKT_RX_RSS_HASH, 0);

	uint16_t i, received;

	for (i = 0, received = 0; i < nb_pkts;
	     i += IAVF_DESCS_PER_LOOP_AVX,
	     rxdp += IAVF_DESCS_PER_LOOP_AVX) {
		/* step 1, copy over 8 mbuf pointers to rx_pkts array */
		_mm256_storeu_si256((void *)&rx_pkts[i],
				    _mm256_loadu_si256((void *)&sw_ring[i]));
#ifdef RTE_ARCH_X86_64
		_mm256_storeu_si256
			((void *)&rx_pkts[i + 4],
			 _mm256_loadu_si256((void *)&sw_ring[i + 4]));
#endif

		__m512i raw_desc0_3, raw_desc4_7;

		const __m128i raw_desc7 =
			_mm_load_si128((void *)(rxdp + 7));
		rte_compiler_barrier();
		const __m128i raw_desc6 =
			_mm_load_si128((void *)(rxdp + 6));
		rte_compiler_barrier();
		const __m128i raw_desc5 =
			_mm_load_si128((void *)(rxdp + 5));
		rte_compiler_barrier();
		const __m128i raw_desc4 =
			_mm_load_si128((void *)(rxdp + 4));
		rte_compiler_barrier();
		const __m128i raw_desc3 =
			_mm_load_si128((void *)(rxdp + 3));
		rte_compiler_barrier();
		const __m128i raw_desc2 =
			_mm_load_si128((void *)(rxdp + 2));
		rte_compiler_barrier();
		const __m128i raw_desc1 =
			_mm_load_si128((void *)(rxdp + 1));
		rte_compiler_barrier();
		const __m128i raw_desc0 =
			_mm_load_si128((void *)(rxdp + 0));

		raw_desc4_7 = _mm512_broadcast_i32x4(raw_desc4);
		raw_desc4_7 = _mm512_inserti32x4(raw_desc4_7, raw_desc5, 1);
		raw_desc4_7 = _mm512_inserti32x4(raw_desc4_7, raw_desc6, 2);
		raw_desc4_7 = _mm512_inserti32x4(raw_desc4_7, raw_desc7, 3);
		raw_desc0_3 = _mm512_broadcast_i32x4(raw_desc0);
		raw_desc0_3 = _mm512_inserti32x4(raw_desc0_3, raw_desc1, 1);
		raw_desc0_3 = _mm512_inserti32x4(raw_desc0_3, raw_desc2, 2);
		raw_desc0_3 = _mm512_inserti32x4(raw_desc0_3, raw_desc3, 3);

		if (split_packet) {
			int j;

			for (j = 0; j < IAVF_DESCS_PER_LOOP_AVX; j++)
				rte_mbuf_prefetch_part2(rx_pkts[i + j]);
		}

		/**
		 * convert descriptors 4-7 into mbufs, re-arrange fields.
		 * Then write into the mbuf.
		 */
		__m512i mb4_7 = _mm512_shuffle_epi8(raw_desc4_7, shuf_msk);

		mb4_7 = _mm512_add_epi16(mb4_7, crc_adjust);
		/**
		 * to get packet types, ptype is located in bit16-25
		 * of each 128bits
		 */
		const __m512i ptype_mask =
			_mm512_set1_epi16(IAVF_RX_FLEX_DESC_PTYPE_M);
		const __m512i ptypes4_7 =
			_mm512_and_si512(raw_desc4_7, ptype_mask);
		const __m256i ptypes6_7 = _mm512_extracti64x4_epi64(ptypes4_7, 1);
		const __m256i ptypes4_5 = _mm512_extracti64x4_epi64(ptypes4_7, 0);
		const uint16_t ptype7 = _mm256_extract_epi16(ptypes6_7, 9);
		const uint16_t ptype6 = _mm256_extract_epi16(ptypes6_7, 1);
		const uint16_t ptype5 = _mm256_extract_epi16(ptypes4_5, 9);
		const uint16_t ptype4 = _mm256_extract_epi16(ptypes4_5, 1);

		const __m512i ptype4_7 = _mm512_set_epi32
			(0, 0, 0, type_table[ptype7],
			 0, 0, 0, type_table[ptype6],
			 0, 0, 0, type_table[ptype5],
			 0, 0, 0, type_table[ptype4]);
		mb4_7 = _mm512_mask_blend_epi32(0x1111, mb4_7, ptype4_7);

		/**
		 * convert descriptors 0-3 into mbufs, re-arrange fields.
		 * Then write into the mbuf.
		 */
		__m512i mb0_3 = _mm512_shuffle_epi8(raw_desc0_3, shuf_msk);

		mb0_3 = _mm512_add_epi16(mb0_3, crc_adjust);
		/**
		 * to get packet types, ptype is located in bit16-25
		 * of each 128bits
		 */
		const __m512i ptypes0_3 =
			_mm512_and_si512(raw_desc0_3, ptype_mask);
		const __m256i ptypes2_3 = _mm512_extracti64x4_epi64(ptypes0_3, 1);
		const __m256i ptypes0_1 = _mm512_extracti64x4_epi64(ptypes0_3, 0);
		const uint16_t ptype3 = _mm256_extract_epi16(ptypes2_3, 9);
		const uint16_t ptype2 = _mm256_extract_epi16(ptypes2_3, 1);
		const uint16_t ptype1 = _mm256_extract_epi16(ptypes0_1, 9);
		const uint16_t ptype0 = _mm256_extract_epi16(ptypes0_1, 1);

		const __m512i ptype0_3 = _mm512_set_epi32
			(0, 0, 0, type_table[ptype3],
			 0, 0, 0, type_table[ptype2],
			 0, 0, 0, type_table[ptype1],
			 0, 0, 0, type_table[ptype0]);
		mb0_3 = _mm512_mask_blend_epi32(0x1111, mb0_3, ptype0_3);

		/**
		 * use permute/extract to get status content
		 * After the operations, the packets status flags are in the
		 * order (hi->lo): [1, 3, 5, 7, 0, 2, 4, 6]
		 */
		/* merge the status bits into one register */
		const __m512i status_permute_msk = _mm512_set_epi32
			(0, 0, 0, 0,
			 0, 0, 0, 0,
			 22, 30, 6, 14,
			 18, 26, 2, 10);
		const __m512i raw_status0_7 = _mm512_permutex2var_epi32
			(raw_desc4_7, status_permute_msk, raw_desc0_3);
		__m256i status0_7 = _mm512_extracti64x4_epi64
			(raw_status0_7, 0);

		/* now do flag manipulation */

		/* get only flag/error bits we want */
		const __m256i flag_bits =
			_mm256_and_si256(status0_7, flags_mask);
		/**
		 * l3_l4_error flags, shuffle, then shift to correct adjustment
		 * of flags in flags_shuf, and finally mask out extra bits
		 */
		__m256i l3_l4_flags = _mm256_shuffle_epi8(l3_l4_flags_shuf,
				_mm256_srli_epi32(flag_bits, 4));
		l3_l4_flags = _mm256_slli_epi32(l3_l4_flags, 1);
		l3_l4_flags = _mm256_and_si256(l3_l4_flags, cksum_mask);
		/* set rss and vlan flags */
		const __m256i rss_vlan_flag_bits =
			_mm256_srli_epi32(flag_bits, 12);
		const __m256i rss_vlan_flags =
			_mm256_shuffle_epi8(rss_vlan_flags_shuf,
					    rss_vlan_flag_bits);

		/* merge flags */
		__m256i mbuf_flags = _mm256_or_si256(l3_l4_flags,
						     rss_vlan_flags);

		if (rxq->fdir_enabled) {
			const __m512i fdir_permute_mask = _mm512_set_epi32
				(0, 0, 0, 0,
				 0, 0, 0, 0,
				 7, 15, 23, 31,
				 3, 11, 19, 27);
			__m512i fdir_tmp = _mm512_permutex2var_epi32
				(raw_desc0_3, fdir_permute_mask, raw_desc4_7);
			const __m256i fdir_id0_7 = _mm512_extracti64x4_epi64
				(fdir_tmp, 0);
			const __m256i fdir_flags =
				flex_rxd_to_fdir_flags_vec_avx512(fdir_id0_7);

			/* merge with fdir_flags */
			mbuf_flags = _mm256_or_si256(mbuf_flags, fdir_flags);

			/* write to mbuf: have to use scalar store here */
			rx_pkts[i + 0]->hash.fdir.hi =
				_mm256_extract_epi32(fdir_id0_7, 3);

			rx_pkts[i + 1]->hash.fdir.hi =
				_mm256_extract_epi32(fdir_id0_7, 7);

			rx_pkts[i + 2]->hash.fdir.hi =
				_mm256_extract_epi32(fdir_id0_7, 2);

			rx_pkts[i + 3]->hash.fdir.hi =
				_mm256_extract_epi32(fdir_id0_7, 6);

			rx_pkts[i + 4]->hash.fdir.hi =
				_mm256_extract_epi32(fdir_id0_7, 1);

			rx_pkts[i + 5]->hash.fdir.hi =
				_mm256_extract_epi32(fdir_id0_7, 5);

			rx_pkts[i + 6]->hash.fdir.hi =
				_mm256_extract_epi32(fdir_id0_7, 0);

			rx_pkts[i + 7]->hash.fdir.hi =
				_mm256_extract_epi32(fdir_id0_7, 4);
		} /* if() on fdir_enabled */

		__m256i mb4_5 = _mm512_extracti64x4_epi64(mb4_7, 0);
		__m256i mb6_7 = _mm512_extracti64x4_epi64(mb4_7, 1);
		__m256i mb0_1 = _mm512_extracti64x4_epi64(mb0_3, 0);
		__m256i mb2_3 = _mm512_extracti64x4_epi64(mb0_3, 1);

#ifndef RTE_LIBRTE_IAVF_16BYTE_RX_DESC
		/**
		 * needs to load 2nd 16B of each desc for RSS hash parsing,
		 * will cause performance drop to get into this context.
		 */
		if (rxq->vsi->adapter->eth_dev->data->dev_conf.rxmode.offloads &
		    DEV_RX_OFFLOAD_RSS_HASH) {
			/* load bottom half of every 32B desc */
			const __m128i raw_desc_bh7 =
				_mm_load_si128
					((void *)(&rxdp[7].wb.status_error1));
			rte_compiler_barrier();
			const __m128i raw_desc_bh6 =
				_mm_load_si128
					((void *)(&rxdp[6].wb.status_error1));
			rte_compiler_barrier();
			const __m128i raw_desc_bh5 =
				_mm_load_si128
					((void *)(&rxdp[5].wb.status_error1));
			rte_compiler_barrier();
			const __m128i raw_desc_bh4 =
				_mm_load_si128
					((void *)(&rxdp[4].wb.status_error1));
			rte_compiler_barrier();
			const __m128i raw_desc_bh3 =
				_mm_load_si128
					((void *)(&rxdp[3].wb.status_error1));
			rte_compiler_barrier();
			const __m128i raw_desc_bh2 =
				_mm_load_si128
					((void *)(&rxdp[2].wb.status_error1));
			rte_compiler_barrier();
			const __m128i raw_desc_bh1 =
				_mm_load_si128
					((void *)(&rxdp[1].wb.status_error1));
			rte_compiler_barrier();
			const __m128i raw_desc_bh0 =
				_mm_load_si128
					((void *)(&rxdp[0].wb.status_error1));

			__m256i raw_desc_bh6_7 =
				_mm256_inserti128_si256
					(_mm256_castsi128_si256(raw_desc_bh6),
					 raw_desc_bh7, 1);
			__m256i raw_desc_bh4_5 =
				_mm256_inserti128_si256
					(_mm256_castsi128_si256(raw_desc_bh4),
					 raw_desc_bh5, 1);
			__m256i raw_desc_bh2_3 =
				_mm256_inserti128_si256
					(_mm256_castsi128_si256(raw_desc_bh2),
					 raw_desc_bh3, 1);
			__m256i raw_desc_bh0_1 =
				_mm256_inserti128_si256
					(_mm256_castsi128_si256(raw_desc_bh0),
					 raw_desc_bh1, 1);

			/**
			 * to shift the 32b RSS hash value to the
			 * highest 32b of each 128b before mask
			 */
			__m256i rss_hash6_7 =
				_mm256_slli_epi64(raw_desc_bh6_7, 32);
			__m256i rss_hash4_5 =
				_mm256_slli_epi64(raw_desc_bh4_5, 32);
			__m256i rss_hash2_3 =
				_mm256_slli_epi64(raw_desc_bh2_3, 32);
			__m256i rss_hash0_1 =
				_mm256_slli_epi64(raw_desc_bh0_1, 32);

			__m256i rss_hash_msk =
				_mm256_set_epi32(0xFFFFFFFF, 0, 0, 0,
						 0xFFFFFFFF, 0, 0, 0);

			rss_hash6_7 = _mm256_and_si256
					(rss_hash6_7, rss_hash_msk);
			rss_hash4_5 = _mm256_and_si256
					(rss_hash4_5, rss_hash_msk);
			rss_hash2_3 = _mm256_and_si256
					(rss_hash2_3, rss_hash_msk);
			rss_hash0_1 = _mm256_and_si256
					(rss_hash0_1, rss_hash_msk);

			mb6_7 = _mm256_or_si256(mb6_7, rss_hash6_7);
			mb4_5 = _mm256_or_si256(mb4_5, rss_hash4_5);
			mb2_3 = _mm256_or_si256(mb2_3, rss_hash2_3);
			mb0_1 = _mm256_or_si256(mb0_1, rss_hash0_1);
		} /* if() on RSS hash parsing */
#endif

		/**
		 * At this point, we have the 8 sets of flags in the low 16-bits
		 * of each 32-bit value in vlan0.
		 * We want to extract these, and merge them with the mbuf init
		 * data so we can do a single write to the mbuf to set the flags
		 * and all the other initialization fields. Extracting the
		 * appropriate flags means that we have to do a shift and blend
		 * for each mbuf before we do the write. However, we can also
		 * add in the previously computed rx_descriptor fields to
		 * make a single 256-bit write per mbuf
		 */
		/* check the structure matches expectations */
		RTE_BUILD_BUG_ON(offsetof(struct rte_mbuf, ol_flags) !=
				 offsetof(struct rte_mbuf, rearm_data) + 8);
		RTE_BUILD_BUG_ON(offsetof(struct rte_mbuf, rearm_data) !=
				 RTE_ALIGN(offsetof(struct rte_mbuf,
						    rearm_data),
						    16));
		/* build up data and do writes */
		__m256i rearm0, rearm1, rearm2, rearm3, rearm4, rearm5,
			rearm6, rearm7;
		rearm6 = _mm256_blend_epi32(mbuf_init,
					    _mm256_slli_si256(mbuf_flags, 8),
					    0x04);
		rearm4 = _mm256_blend_epi32(mbuf_init,
					    _mm256_slli_si256(mbuf_flags, 4),
					    0x04);
		rearm2 = _mm256_blend_epi32(mbuf_init, mbuf_flags, 0x04);
		rearm0 = _mm256_blend_epi32(mbuf_init,
					    _mm256_srli_si256(mbuf_flags, 4),
					    0x04);
		/* permute to add in the rx_descriptor e.g. rss fields */
		rearm6 = _mm256_permute2f128_si256(rearm6, mb6_7, 0x20);
		rearm4 = _mm256_permute2f128_si256(rearm4, mb4_5, 0x20);
		rearm2 = _mm256_permute2f128_si256(rearm2, mb2_3, 0x20);
		rearm0 = _mm256_permute2f128_si256(rearm0, mb0_1, 0x20);
		/* write to mbuf */
		_mm256_storeu_si256((__m256i *)&rx_pkts[i + 6]->rearm_data,
				    rearm6);
		_mm256_storeu_si256((__m256i *)&rx_pkts[i + 4]->rearm_data,
				    rearm4);
		_mm256_storeu_si256((__m256i *)&rx_pkts[i + 2]->rearm_data,
				    rearm2);
		_mm256_storeu_si256((__m256i *)&rx_pkts[i + 0]->rearm_data,
				    rearm0);

		/* repeat for the odd mbufs */
		const __m256i odd_flags =
			_mm256_castsi128_si256
				(_mm256_extracti128_si256(mbuf_flags, 1));
		rearm7 = _mm256_blend_epi32(mbuf_init,
					    _mm256_slli_si256(odd_flags, 8),
					    0x04);
		rearm5 = _mm256_blend_epi32(mbuf_init,
					    _mm256_slli_si256(odd_flags, 4),
					    0x04);
		rearm3 = _mm256_blend_epi32(mbuf_init, odd_flags, 0x04);
		rearm1 = _mm256_blend_epi32(mbuf_init,
					    _mm256_srli_si256(odd_flags, 4),
					    0x04);
		/* since odd mbufs are already in hi 128-bits use blend */
		rearm7 = _mm256_blend_epi32(rearm7, mb6_7, 0xF0);
		rearm5 = _mm256_blend_epi32(rearm5, mb4_5, 0xF0);
		rearm3 = _mm256_blend_epi32(rearm3, mb2_3, 0xF0);
		rearm1 = _mm256_blend_epi32(rearm1, mb0_1, 0xF0);
		/* again write to mbufs */
		_mm256_storeu_si256((__m256i *)&rx_pkts[i + 7]->rearm_data,
				    rearm7);
		_mm256_storeu_si256((__m256i *)&rx_pkts[i + 5]->rearm_data,
				    rearm5);
		_mm256_storeu_si256((__m256i *)&rx_pkts[i + 3]->rearm_data,
				    rearm3);
		_mm256_storeu_si256((__m256i *)&rx_pkts[i + 1]->rearm_data,
				    rearm1);

		/* extract and record EOP bit */
		if (split_packet) {
			const __m128i eop_mask =
				_mm_set1_epi16(1 <<
					       IAVF_RX_FLEX_DESC_STATUS0_EOF_S);
			const __m256i eop_bits256 = _mm256_and_si256(status0_7,
								     eop_check);
			/* pack status bits into a single 128-bit register */
			const __m128i eop_bits =
				_mm_packus_epi32
					(_mm256_castsi256_si128(eop_bits256),
					 _mm256_extractf128_si256(eop_bits256,
								  1));
			/**
			 * flip bits, and mask out the EOP bit, which is now
			 * a split-packet bit i.e. !EOP, rather than EOP one.
			 */
			__m128i split_bits = _mm_andnot_si128(eop_bits,
							      eop_mask);
			/**
			 * eop bits are out of order, so we need to shuffle them
			 * back into order again. In doing so, only use low 8
			 * bits, which acts like another pack instruction
			 * The original order is (hi->lo): 1,3,5,7,0,2,4,6
			 * [Since we use epi8, the 16-bit positions are
			 * multiplied by 2 in the eop_shuffle value.]
			 */
			__m128i eop_shuffle =
				_mm_set_epi8(/* zero hi 64b */
					     0xFF, 0xFF, 0xFF, 0xFF,
					     0xFF, 0xFF, 0xFF, 0xFF,
					     /* move values to lo 64b */
					     8, 0, 10, 2,
					     12, 4, 14, 6);
			split_bits = _mm_shuffle_epi8(split_bits, eop_shuffle);
			*(uint64_t *)split_packet =
				_mm_cvtsi128_si64(split_bits);
			split_packet += IAVF_DESCS_PER_LOOP_AVX;
		}

		/* perform dd_check */
		status0_7 = _mm256_and_si256(status0_7, dd_check);
		status0_7 = _mm256_packs_epi32(status0_7,
					       _mm256_setzero_si256());

		uint64_t burst = __builtin_popcountll
					(_mm_cvtsi128_si64
						(_mm256_extracti128_si256
							(status0_7, 1)));
		burst += __builtin_popcountll
				(_mm_cvtsi128_si64
					(_mm256_castsi256_si128(status0_7)));
		received += burst;
		if (burst != IAVF_DESCS_PER_LOOP_AVX)
			break;
	}

	/* update tail pointers */
	rxq->rx_tail += received;
	rxq->rx_tail &= (rxq->nb_rx_desc - 1);
	if ((rxq->rx_tail & 1) == 1 && received > 1) { /* keep aligned */
		rxq->rx_tail--;
		received--;
	}
	rxq->rxrearm_nb += received;
	return received;
}

/**
 * Notice:
 * - nb_pkts < IAVF_DESCS_PER_LOOP, just return no packet
 */
uint16_t
iavf_recv_pkts_vec_avx512(void *rx_queue, struct rte_mbuf **rx_pkts,
			  uint16_t nb_pkts)
{
	return _iavf_recv_raw_pkts_vec_avx512(rx_queue, rx_pkts, nb_pkts, NULL);
}

/**
 * Notice:
 * - nb_pkts < IAVF_DESCS_PER_LOOP, just return no packet
 */
uint16_t
iavf_recv_pkts_vec_avx512_flex_rxd(void *rx_queue, struct rte_mbuf **rx_pkts,
				   uint16_t nb_pkts)
{
	return _iavf_recv_raw_pkts_vec_avx512_flex_rxd(rx_queue, rx_pkts,
						       nb_pkts, NULL);
}

/**
 * vPMD receive routine that reassembles single burst of 32 scattered packets
 * Notice:
 * - nb_pkts < IAVF_DESCS_PER_LOOP, just return no packet
 */
static uint16_t
iavf_recv_scattered_burst_vec_avx512(void *rx_queue, struct rte_mbuf **rx_pkts,
				     uint16_t nb_pkts)
{
	struct iavf_rx_queue *rxq = rx_queue;
	uint8_t split_flags[IAVF_VPMD_RX_MAX_BURST] = {0};

	/* get some new buffers */
	uint16_t nb_bufs = _iavf_recv_raw_pkts_vec_avx512(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 &&
	    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) {
		/* 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.
 * Main receive routine that can handle arbitrary burst sizes
 * Notice:
 * - nb_pkts < IAVF_DESCS_PER_LOOP, just return no packet
 */
uint16_t
iavf_recv_scattered_pkts_vec_avx512(void *rx_queue, struct rte_mbuf **rx_pkts,
				    uint16_t nb_pkts)
{
	uint16_t retval = 0;

	while (nb_pkts > IAVF_VPMD_RX_MAX_BURST) {
		uint16_t burst = iavf_recv_scattered_burst_vec_avx512(rx_queue,
				rx_pkts + retval, IAVF_VPMD_RX_MAX_BURST);
		retval += burst;
		nb_pkts -= burst;
		if (burst < IAVF_VPMD_RX_MAX_BURST)
			return retval;
	}
	return retval + iavf_recv_scattered_burst_vec_avx512(rx_queue,
				rx_pkts + retval, nb_pkts);
}

/**
 * vPMD receive routine that reassembles single burst of
 * 32 scattered packets for flex RxD
 * Notice:
 * - nb_pkts < IAVF_DESCS_PER_LOOP, just return no packet
 */
static uint16_t
iavf_recv_scattered_burst_vec_avx512_flex_rxd(void *rx_queue,
					      struct rte_mbuf **rx_pkts,
					      uint16_t nb_pkts)
{
	struct iavf_rx_queue *rxq = rx_queue;
	uint8_t split_flags[IAVF_VPMD_RX_MAX_BURST] = {0};

	/* get some new buffers */
	uint16_t nb_bufs = _iavf_recv_raw_pkts_vec_avx512_flex_rxd(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 &&
	    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) {
		/* 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 for flex RxD.
 * Main receive routine that can handle arbitrary burst sizes
 * Notice:
 * - nb_pkts < IAVF_DESCS_PER_LOOP, just return no packet
 */
uint16_t
iavf_recv_scattered_pkts_vec_avx512_flex_rxd(void *rx_queue,
					     struct rte_mbuf **rx_pkts,
					     uint16_t nb_pkts)
{
	uint16_t retval = 0;

	while (nb_pkts > IAVF_VPMD_RX_MAX_BURST) {
		uint16_t burst =
			iavf_recv_scattered_burst_vec_avx512_flex_rxd
				(rx_queue, rx_pkts + retval,
				 IAVF_VPMD_RX_MAX_BURST);
		retval += burst;
		nb_pkts -= burst;
		if (burst < IAVF_VPMD_RX_MAX_BURST)
			return retval;
	}
	return retval + iavf_recv_scattered_burst_vec_avx512_flex_rxd(rx_queue,
				rx_pkts + retval, nb_pkts);
}

static __rte_always_inline int
iavf_tx_free_bufs_avx512(struct iavf_tx_queue *txq)
{
	struct iavf_tx_vec_entry *txep;
	uint32_t n;
	uint32_t i;
	int nb_free = 0;
	struct rte_mbuf *m, *free[IAVF_VPMD_TX_MAX_FREE_BUF];

	/* check DD bits on threshold descriptor */
	if ((txq->tx_ring[txq->next_dd].cmd_type_offset_bsz &
	     rte_cpu_to_le_64(IAVF_TXD_QW1_DTYPE_MASK)) !=
	    rte_cpu_to_le_64(IAVF_TX_DESC_DTYPE_DESC_DONE))
		return 0;

	n = txq->rs_thresh;

	 /* first buffer to free from S/W ring is at index
	  * tx_next_dd - (tx_rs_thresh-1)
	  */
	txep = (void *)txq->sw_ring;
	txep += txq->next_dd - (n - 1);

	if (txq->offloads & DEV_TX_OFFLOAD_MBUF_FAST_FREE && (n & 31) == 0) {
		struct rte_mempool *mp = txep[0].mbuf->pool;
		struct rte_mempool_cache *cache = rte_mempool_default_cache(mp,
								rte_lcore_id());
		void **cache_objs;

		if (!cache || cache->len == 0)
			goto normal;

		cache_objs = &cache->objs[cache->len];

		if (n > RTE_MEMPOOL_CACHE_MAX_SIZE) {
			rte_mempool_ops_enqueue_bulk(mp, (void *)txep, n);
			goto done;
		}

		/* The cache follows the following algorithm
		 *   1. Add the objects to the cache
		 *   2. Anything greater than the cache min value (if it crosses the
		 *   cache flush threshold) is flushed to the ring.
		 */
		/* Add elements back into the cache */
		uint32_t copied = 0;
		/* n is multiple of 32 */
		while (copied < n) {
			const __m512i a = _mm512_loadu_si512(&txep[copied]);
			const __m512i b = _mm512_loadu_si512(&txep[copied + 8]);
			const __m512i c = _mm512_loadu_si512(&txep[copied + 16]);
			const __m512i d = _mm512_loadu_si512(&txep[copied + 24]);

			_mm512_storeu_si512(&cache_objs[copied], a);
			_mm512_storeu_si512(&cache_objs[copied + 8], b);
			_mm512_storeu_si512(&cache_objs[copied + 16], c);
			_mm512_storeu_si512(&cache_objs[copied + 24], d);
			copied += 32;
		}
		cache->len += n;

		if (cache->len >= cache->flushthresh) {
			rte_mempool_ops_enqueue_bulk(mp,
						     &cache->objs[cache->size],
						     cache->len - cache->size);
			cache->len = cache->size;
		}
		goto done;
	}

normal:
	m = rte_pktmbuf_prefree_seg(txep[0].mbuf);
	if (likely(m)) {
		free[0] = m;
		nb_free = 1;
		for (i = 1; i < n; i++) {
			m = rte_pktmbuf_prefree_seg(txep[i].mbuf);
			if (likely(m)) {
				if (likely(m->pool == free[0]->pool)) {
					free[nb_free++] = m;
				} else {
					rte_mempool_put_bulk(free[0]->pool,
							     (void *)free,
							     nb_free);
					free[0] = m;
					nb_free = 1;
				}
			}
		}
		rte_mempool_put_bulk(free[0]->pool, (void **)free, nb_free);
	} else {
		for (i = 1; i < n; i++) {
			m = rte_pktmbuf_prefree_seg(txep[i].mbuf);
			if (m)
				rte_mempool_put(m->pool, m);
		}
	}

done:
	/* buffers were freed, update counters */
	txq->nb_free = (uint16_t)(txq->nb_free + txq->rs_thresh);
	txq->next_dd = (uint16_t)(txq->next_dd + txq->rs_thresh);
	if (txq->next_dd >= txq->nb_tx_desc)
		txq->next_dd = (uint16_t)(txq->rs_thresh - 1);

	return txq->rs_thresh;
}

static __rte_always_inline void
tx_backlog_entry_avx512(struct iavf_tx_vec_entry *txep,
			struct rte_mbuf **tx_pkts, uint16_t nb_pkts)
{
	int i;

	for (i = 0; i < (int)nb_pkts; ++i)
		txep[i].mbuf = tx_pkts[i];
}

static inline void
iavf_vtx1(volatile struct iavf_tx_desc *txdp,
	  struct rte_mbuf *pkt, uint64_t flags)
{
	uint64_t high_qw =
		(IAVF_TX_DESC_DTYPE_DATA |
		 ((uint64_t)flags  << IAVF_TXD_QW1_CMD_SHIFT) |
		 ((uint64_t)pkt->data_len << IAVF_TXD_QW1_TX_BUF_SZ_SHIFT));

	__m128i descriptor = _mm_set_epi64x(high_qw,
					    pkt->buf_iova + pkt->data_off);
	_mm_storeu_si128((__m128i *)txdp, descriptor);
}

#define IAVF_TX_LEN_MASK 0xAA
#define IAVF_TX_OFF_MASK 0x55
static inline void
iavf_vtx(volatile struct iavf_tx_desc *txdp,
	 struct rte_mbuf **pkt, uint16_t nb_pkts,  uint64_t flags)
{
	const uint64_t hi_qw_tmpl = (IAVF_TX_DESC_DTYPE_DATA |
			((uint64_t)flags  << IAVF_TXD_QW1_CMD_SHIFT));

	/* if unaligned on 32-bit boundary, do one to align */
	if (((uintptr_t)txdp & 0x1F) != 0 && nb_pkts != 0) {
		iavf_vtx1(txdp, *pkt, flags);
		nb_pkts--, txdp++, pkt++;
	}

	/* do 4 at a time while possible, in bursts */
	for (; nb_pkts > 3; txdp += 4, pkt += 4, nb_pkts -= 4) {
		__m512i desc4 =
			_mm512_set_epi64
				((uint64_t)pkt[3]->data_len,
				 pkt[3]->buf_iova,
				 (uint64_t)pkt[2]->data_len,
				 pkt[2]->buf_iova,
				 (uint64_t)pkt[1]->data_len,
				 pkt[1]->buf_iova,
				 (uint64_t)pkt[0]->data_len,
				 pkt[0]->buf_iova);
		__m512i hi_qw_tmpl_4 = _mm512_set1_epi64(hi_qw_tmpl);
		__m512i data_off_4 =
			_mm512_set_epi64
				(0,
				 pkt[3]->data_off,
				 0,
				 pkt[2]->data_off,
				 0,
				 pkt[1]->data_off,
				 0,
				 pkt[0]->data_off);

		desc4 = _mm512_mask_slli_epi64(desc4, IAVF_TX_LEN_MASK, desc4,
					       IAVF_TXD_QW1_TX_BUF_SZ_SHIFT);
		desc4 = _mm512_mask_or_epi64(desc4, IAVF_TX_LEN_MASK, desc4,
					     hi_qw_tmpl_4);
		desc4 = _mm512_mask_add_epi64(desc4, IAVF_TX_OFF_MASK, desc4,
					      data_off_4);
		_mm512_storeu_si512((void *)txdp, desc4);
	}

	/* do any last ones */
	while (nb_pkts) {
		iavf_vtx1(txdp, *pkt, flags);
		txdp++, pkt++, nb_pkts--;
	}
}

static inline uint16_t
iavf_xmit_fixed_burst_vec_avx512(void *tx_queue, struct rte_mbuf **tx_pkts,
				 uint16_t nb_pkts)
{
	struct iavf_tx_queue *txq = (struct iavf_tx_queue *)tx_queue;
	volatile struct iavf_tx_desc *txdp;
	struct iavf_tx_vec_entry *txep;
	uint16_t n, nb_commit, tx_id;
	/* bit2 is reserved and must be set to 1 according to Spec */
	uint64_t flags = IAVF_TX_DESC_CMD_EOP | IAVF_TX_DESC_CMD_ICRC;
	uint64_t rs = IAVF_TX_DESC_CMD_RS | flags;

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

	if (txq->nb_free < txq->free_thresh)
		iavf_tx_free_bufs_avx512(txq);

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

	tx_id = txq->tx_tail;
	txdp = &txq->tx_ring[tx_id];
	txep = (void *)txq->sw_ring;
	txep += tx_id;

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

	n = (uint16_t)(txq->nb_tx_desc - tx_id);
	if (nb_commit >= n) {
		tx_backlog_entry_avx512(txep, tx_pkts, n);

		iavf_vtx(txdp, tx_pkts, n - 1, flags);
		tx_pkts += (n - 1);
		txdp += (n - 1);

		iavf_vtx1(txdp, *tx_pkts++, rs);

		nb_commit = (uint16_t)(nb_commit - n);

		tx_id = 0;
		txq->next_rs = (uint16_t)(txq->rs_thresh - 1);

		/* avoid reach the end of ring */
		txdp = &txq->tx_ring[tx_id];
		txep = (void *)txq->sw_ring;
		txep += tx_id;
	}

	tx_backlog_entry_avx512(txep, tx_pkts, nb_commit);

	iavf_vtx(txdp, tx_pkts, nb_commit, flags);

	tx_id = (uint16_t)(tx_id + nb_commit);
	if (tx_id > txq->next_rs) {
		txq->tx_ring[txq->next_rs].cmd_type_offset_bsz |=
			rte_cpu_to_le_64(((uint64_t)IAVF_TX_DESC_CMD_RS) <<
					 IAVF_TXD_QW1_CMD_SHIFT);
		txq->next_rs =
			(uint16_t)(txq->next_rs + txq->rs_thresh);
	}

	txq->tx_tail = tx_id;

	IAVF_PCI_REG_WRITE(txq->qtx_tail, txq->tx_tail);

	return nb_pkts;
}

uint16_t
iavf_xmit_pkts_vec_avx512(void *tx_queue, struct rte_mbuf **tx_pkts,
			  uint16_t nb_pkts)
{
	uint16_t nb_tx = 0;
	struct iavf_tx_queue *txq = (struct iavf_tx_queue *)tx_queue;

	while (nb_pkts) {
		uint16_t ret, num;

		num = (uint16_t)RTE_MIN(nb_pkts, txq->rs_thresh);
		ret = iavf_xmit_fixed_burst_vec_avx512(tx_queue, &tx_pkts[nb_tx],
						       num);
		nb_tx += ret;
		nb_pkts -= ret;
		if (ret < num)
			break;
	}

	return nb_tx;
}

static inline void
iavf_tx_queue_release_mbufs_avx512(struct iavf_tx_queue *txq)
{
	unsigned int i;
	const uint16_t max_desc = (uint16_t)(txq->nb_tx_desc - 1);
	struct iavf_tx_vec_entry *swr = (void *)txq->sw_ring;

	if (!txq->sw_ring || txq->nb_free == max_desc)
		return;

	i = txq->next_dd - txq->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;
	}
}

static const struct iavf_txq_ops avx512_vec_txq_ops = {
	.release_mbufs = iavf_tx_queue_release_mbufs_avx512,
};

int __rte_cold
iavf_txq_vec_setup_avx512(struct iavf_tx_queue *txq)
{
	txq->ops = &avx512_vec_txq_ops;
	return 0;
}
