-----Original Message-----
From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Jianbo Liu
Sent: Wednesday, August 24, 2016 5:54 PM
To: Zhang, Helin <redacted>; Wu, Jingjing
[off-list ref]; jerin.jacob@caviumnetworks.com; dev@dpdk.org
Cc: Jianbo Liu <redacted>
Subject: [dpdk-dev] [PATCH 2/5] i40e: implement vector PMD for ARM
architecture

Use ARM NEON intrinsic to implement i40e vPMD

Signed-off-by: Jianbo Liu <redacted>
---
 drivers/net/i40e/Makefile             |   4 +
 drivers/net/i40e/i40e_rxtx_vec_neon.c | 581
++++++++++++++++++++++++++++++++++
 2 files changed, 585 insertions(+)
 create mode 100644 drivers/net/i40e/i40e_rxtx_vec_neon.c

diff --git a/drivers/net/i40e/Makefile b/drivers/net/i40e/Makefile index

53fe145..9e92b38 100644

--- a/drivers/net/i40e/Makefile
+++ b/drivers/net/i40e/Makefile

@@ -97,7 +97,11 @@ SRCS-$(CONFIG_RTE_LIBRTE_I40E_PMD) += i40e_dcb.c

 SRCS-$(CONFIG_RTE_LIBRTE_I40E_PMD) += i40e_ethdev.c
 SRCS-$(CONFIG_RTE_LIBRTE_I40E_PMD) += i40e_rxtx.c
+ifeq ($(CONFIG_RTE_ARCH_ARM64),y)
+SRCS-$(CONFIG_RTE_LIBRTE_I40E_INC_VECTOR) += i40e_rxtx_vec_neon.c

else
 SRCS-$(CONFIG_RTE_LIBRTE_I40E_INC_VECTOR) += i40e_rxtx_vec.c
+endif
 SRCS-$(CONFIG_RTE_LIBRTE_I40E_PMD) += i40e_ethdev_vf.c
 SRCS-$(CONFIG_RTE_LIBRTE_I40E_PMD) += i40e_pf.c
 SRCS-$(CONFIG_RTE_LIBRTE_I40E_PMD) += i40e_fdir.c diff --git
a/drivers/net/i40e/i40e_rxtx_vec_neon.c
b/drivers/net/i40e/i40e_rxtx_vec_neon.c
new file mode 100644
index 0000000..015fa9f

--- /dev/null
+++ b/drivers/net/i40e/i40e_rxtx_vec_neon.c

@@ -0,0 +1,581 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2010-2015 Intel Corporation. All rights reserved.
+ *   Copyright(c) 2016, Linaro Limited
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND

CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT
NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
DAMAGE.
+ */
+
+#include <stdint.h>
+#include <rte_ethdev.h>
+#include <rte_malloc.h>
+
+#include "base/i40e_prototype.h"
+#include "base/i40e_type.h"
+#include "i40e_ethdev.h"
+#include "i40e_rxtx.h"
+#include "i40e_rxtx_vec_common.h"
+
+#include <arm_neon.h>
+
+#pragma GCC diagnostic ignored "-Wcast-qual"
+
+static inline void
+i40e_rxq_rearm(struct i40e_rx_queue *rxq) {
+	int i;
+	uint16_t rx_id;
+	volatile union i40e_rx_desc *rxdp;
+	struct i40e_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->mp,
+					  (void *)rxep,
+					  RTE_I40E_RXQ_REARM_THRESH) < 0)) {
+		if (rxq->rxrearm_nb + RTE_I40E_RXQ_REARM_THRESH >=
+		    rxq->nb_rx_desc) {
+			for (i = 0; i < RTE_I40E_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_I40E_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_I40E_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.
+		 * Though, RX will overwrite ol_flags that are coming next
+		 * anyway. So overwrite whole 8 bytes with one load:
+		 * 6 bytes of rearm_data plus first 2 bytes of ol_flags.
+		 */
+		vst1_u8((uint8_t *)&mb0->rearm_data, p);
+		paddr = mb0->buf_physaddr + RTE_PKTMBUF_HEADROOM;
+		dma_addr0 = vdupq_n_u64(paddr);
+
+		/* 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_physaddr + RTE_PKTMBUF_HEADROOM;
+		dma_addr1 = vdupq_n_u64(paddr);
+		vst1q_u64((uint64_t *)&rxdp++->read, dma_addr1);
+	}
+
+	rxq->rxrearm_start += RTE_I40E_RXQ_REARM_THRESH;
+	if (rxq->rxrearm_start >= rxq->nb_rx_desc)
+		rxq->rxrearm_start = 0;
+
+	rxq->rxrearm_nb -= RTE_I40E_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 */
+	I40E_PCI_REG_WRITE(rxq->qrx_tail, rx_id); }
+
+/* Handling the offload flags (olflags) field takes computation
+ * time when receiving packets. Therefore we provide a flag to disable
+ * the processing of the olflags field when they are not needed. This
+ * gives improved performance, at the cost of losing the offload info
+ * in the received packet
+ */
+#ifdef RTE_LIBRTE_I40E_RX_OLFLAGS_ENABLE
+
+static inline void
+desc_to_olflags_v(uint16x8_t staterr, struct rte_mbuf **rx_pkts) {
+	uint16x8_t vlan0, vlan1, rss;
+	union {
+		uint16_t e[4];
+		uint64_t dword;
+	} vol;
+
+	/* mask everything except RSS, flow director and VLAN flags
+	 * bit2 is for VLAN tag, bit11 for flow director indication
+	 * bit13:12 for RSS indication.
+	 */
+	const uint16x8_t rss_vlan_msk = {
+			0x3804, 0x3804, 0x3804, 0x3804,
+			0x0000, 0x0000, 0x0000, 0x0000};
+
+	/* map rss and vlan type to rss hash and vlan flag */
+	const uint8x16_t vlan_flags = {
+			0, 0, 0, 0,
+			PKT_RX_VLAN_PKT | PKT_RX_VLAN_STRIPPED, 0, 0, 0,
+			0, 0, 0, 0,
+			0, 0, 0, 0};
+
+	const uint8x16_t rss_flags = {
+			0, PKT_RX_FDIR, 0, 0,
+			0, 0, PKT_RX_RSS_HASH, PKT_RX_RSS_HASH | PKT_RX_FDIR,
+			0, 0, 0, 0,
+			0, 0, 0, 0};
+
+	vlan1 = vandq_u16(staterr, rss_vlan_msk);
+	vlan0 = vreinterpretq_u16_u8(vqtbl1q_u8(vlan_flags,
+						vreinterpretq_u8_u16(vlan1)));
+
+	rss = vshrq_n_u16(vlan1, 11);
+	rss = vreinterpretq_u16_u8(vqtbl1q_u8(rss_flags,
+					      vreinterpretq_u8_u16(rss)));
+
+	vlan0 = vorrq_u16(vlan0, rss);
+	vol.dword = vgetq_lane_u64(vreinterpretq_u64_u16(vlan0), 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];
+}
+#else
+#define desc_to_olflags_v(staterr, rx_pkts) do {} while (0) #endif
+
+#define PKTLEN_SHIFT     10
+
+#define I40E_VPMD_DESC_DD_MASK	0x0001000100010001ULL
+
+ /*
+ * Notice:
+ * - nb_pkts < RTE_I40E_DESCS_PER_LOOP, just return no packet
+ * - nb_pkts > RTE_I40E_VPMD_RX_BURST, only scan
RTE_I40E_VPMD_RX_BURST
+ *   numbers of DD bits
+ */
+static inline uint16_t
+_recv_raw_pkts_vec(struct i40e_rx_queue *rxq, struct rte_mbuf **rx_pkts,
+		   uint16_t nb_pkts, uint8_t *split_packet) {
+	volatile union i40e_rx_desc *rxdp;
+	struct i40e_rx_entry *sw_ring;
+	uint16_t nb_pkts_recd;
+	int pos;
+	uint64_t var;
+
+	/* mask to shuffle from desc. to mbuf */
+	uint8x16_t shuf_msk = {
+		0xFF, 0xFF,   /* pkt_type set as unknown */
+		0xFF, 0xFF,   /* pkt_type set as unknown */
+		14, 15,       /* octet 15~14, low 16 bits pkt_len */
+		0xFF, 0xFF,   /* skip high 16 bits pkt_len, zero out */
+		14, 15,       /* octet 15~14, 16 bits data_len */
+		2, 3,         /* octet 2~3, low 16 bits vlan_macip */
+		4, 5, 6, 7    /* octet 4~7, 32bits rss */
+		};
+
+	uint8x16_t eop_check = {
+		0x02, 0x00, 0x02, 0x00,
+		0x02, 0x00, 0x02, 0x00,
+		0x00, 0x00, 0x00, 0x00,
+		0x00, 0x00, 0x00, 0x00
+		};
+
+	uint16x8_t crc_adjust = {
+		0, 0,         /* ignore pkt_type field */
+		rxq->crc_len, /* sub crc on pkt_len */
+		0,            /* ignore high-16bits of pkt_len */
+		rxq->crc_len, /* sub crc on data_len */
+		0, 0, 0       /* ignore non-length fields */
+		};
+
+	/* nb_pkts shall be less equal than RTE_I40E_MAX_RX_BURST */
+	nb_pkts = RTE_MIN(nb_pkts, RTE_I40E_MAX_RX_BURST);
+
+	/* nb_pkts has to be floor-aligned to RTE_I40E_DESCS_PER_LOOP */
+	nb_pkts = RTE_ALIGN_FLOOR(nb_pkts, RTE_I40E_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_I40E_RXQ_REARM_THRESH)
+		i40e_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 << I40E_RX_DESC_STATUS_DD_SHIFT)))
+		return 0;
+
+	/* 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];
+
+	/* A. load 4 packet in one loop
+	 * [A*. mask out 4 unused dirty field in desc]
+	 * 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_I40E_DESCS_PER_LOOP,
+			rxdp += RTE_I40E_DESCS_PER_LOOP) {
+		uint64x2_t descs[RTE_I40E_DESCS_PER_LOOP];
+		uint8x16_t pkt_mb1, pkt_mb2, pkt_mb3, pkt_mb4;
+		uint16x8x2_t sterr_tmp1, sterr_tmp2;
+		uint64x2_t mbp1, mbp2;
+		uint16x8_t staterr;
+		uint16x8_t tmp;
+		uint64_t stat;
+
+		int32x4_t len_shl = {0, 0, 0, PKTLEN_SHIFT};
+
+		/* B.1 load 1 mbuf point */
+		mbp1 = vld1q_u64((uint64_t *)&sw_ring[pos]);
+		/* Read desc statuses backwards to avoid race condition */
+		/* A.1 load 4 pkts desc */
+		descs[3] =  vld1q_u64((uint64_t *)(rxdp + 3));
+		rte_rmb();
+
+		/* B.2 copy 2 mbuf point into rx_pkts  */
+		vst1q_u64((uint64_t *)&rx_pkts[pos], mbp1);
+
+		/* B.1 load 1 mbuf point */
+		mbp2 = vld1q_u64((uint64_t *)&sw_ring[pos + 2]);
+
+		descs[2] =  vld1q_u64((uint64_t *)(rxdp + 2));
+		/* B.1 load 2 mbuf point */
+		descs[1] =  vld1q_u64((uint64_t *)(rxdp + 1));
+		descs[0] =  vld1q_u64((uint64_t *)(rxdp));
+
+		/* 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]);
+		}
+
+		/* avoid compiler reorder optimization */
+		rte_compiler_barrier();
+
+		/* pkt 3,4 shift the pktlen field to be 16-bit aligned*/
+		uint32x4_t len3 = vshlq_u32(vreinterpretq_u32_u64(descs[3]),
+					    len_shl);
+		descs[3] = vreinterpretq_u64_u32(len3);
+		uint32x4_t len2 = vshlq_u32(vreinterpretq_u32_u64(descs[2]),
+					    len_shl);
+		descs[2] = vreinterpretq_u64_u32(len2);
+
+		/* 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);
+
+		/* C.1 4=>2 filter staterr info only */
+		sterr_tmp2 = vzipq_u16(vreinterpretq_u16_u64(descs[1]),
+				       vreinterpretq_u16_u64(descs[3]));
+		/* C.1 4=>2 filter staterr info only */
+		sterr_tmp1 = vzipq_u16(vreinterpretq_u16_u64(descs[0]),
+				       vreinterpretq_u16_u64(descs[2]));
+
+		/* C.2 get 4 pkts staterr value  */
+		staterr = vzipq_u16(sterr_tmp1.val[1],
+				    sterr_tmp2.val[1]).val[0];
+		stat = vgetq_lane_u64(vreinterpretq_u64_u16(staterr), 0);
+
+		desc_to_olflags_v(staterr, &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);
+
+		/* pkt 1,2 shift the pktlen field to be 16-bit aligned*/
+		uint32x4_t len1 = vshlq_u32(vreinterpretq_u32_u64(descs[1]),
+					    len_shl);
+		descs[1] = vreinterpretq_u64_u32(len1);
+		uint32x4_t len0 = vshlq_u32(vreinterpretq_u32_u64(descs[0]),
+					    len_shl);
+		descs[0] = vreinterpretq_u64_u32(len0);
+
+		/* 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);
+
+		/* 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) {
+			uint8x16_t eop_shuf_mask = {
+					0x00, 0x02, 0x04, 0x06,
+					0xFF, 0xFF, 0xFF, 0xFF,
+					0xFF, 0xFF, 0xFF, 0xFF,
+					0xFF, 0xFF, 0xFF, 0xFF};
+			uint8x16_t eop_bits;
+
+			/* and with mask to extract bits, flipping 1-0 */
+			eop_bits = vmvnq_u8(vreinterpretq_u8_u16(staterr));
+			eop_bits = vandq_u8(eop_bits, eop_check);
+			/* the staterr values are not in order, as the count
+			 * count of dd bits doesn't care. However, for end of
+			 * packet tracking, we do care, so shuffle. This also
+			 * compresses the 32-bit values to 8-bit
+			 */
+			eop_bits = vqtbl1q_u8(eop_bits, eop_shuf_mask);
+
+			/* store the resulting 32-bit value */
+			vst1q_lane_u32((uint32_t *)split_packet,
+				       vreinterpretq_u32_u8(eop_bits), 0);
+			split_packet += RTE_I40E_DESCS_PER_LOOP;
+
+			/* zero-out next pointers */
+			rx_pkts[pos]->next = NULL;
+			rx_pkts[pos + 1]->next = NULL;
+			rx_pkts[pos + 2]->next = NULL;
+			rx_pkts[pos + 3]->next = NULL;
+		}
+
+		rte_prefetch_non_temporal(rxdp + RTE_I40E_DESCS_PER_LOOP);
+
+		/* D.3 copy final 1,2 data to rx_pkts */
+		vst1q_u8((void *)&rx_pkts[pos + 1]->rx_descriptor_fields1,
+			 pkt_mb2);
+		vst1q_u8((void *)&rx_pkts[pos]->rx_descriptor_fields1,
+			 pkt_mb1);
+		/* C.4 calc avaialbe number of desc */
+		var = __builtin_popcountll(stat & I40E_VPMD_DESC_DD_MASK);
+		nb_pkts_recd += var;
+		if (likely(var != RTE_I40E_DESCS_PER_LOOP))
+			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;
+}
+
+ /*
+ * Notice:
+ * - nb_pkts < RTE_I40E_DESCS_PER_LOOP, just return no packet
+ * - nb_pkts > RTE_I40E_VPMD_RX_BURST, only scan
RTE_I40E_VPMD_RX_BURST
+ *   numbers of DD bits
+ */
+uint16_t
+i40e_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_I40E_DESCS_PER_LOOP, just return no packet
+ * - nb_pkts > RTE_I40E_VPMD_RX_BURST, only scan
RTE_I40E_VPMD_RX_BURST
+ *   numbers of DD bits
+ */
+uint16_t
+i40e_recv_scattered_pkts_vec(void *rx_queue, struct rte_mbuf **rx_pkts,
+			     uint16_t nb_pkts)
+{
+
+	struct i40e_rx_queue *rxq = rx_queue;
+	uint8_t split_flags[RTE_I40E_VPMD_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 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;
+	}
+	return i + reassemble_packets(rxq, &rx_pkts[i], nb_bufs - i,
+		&split_flags[i]);
+}
+
+static inline void
+vtx1(volatile struct i40e_tx_desc *txdp,
+		struct rte_mbuf *pkt, uint64_t flags) {
+	uint64_t high_qw = (I40E_TX_DESC_DTYPE_DATA |
+			((uint64_t)flags  << I40E_TXD_QW1_CMD_SHIFT) |
+			((uint64_t)pkt->data_len <<
I40E_TXD_QW1_TX_BUF_SZ_SHIFT));
+
+	uint64x2_t descriptor = {pkt->buf_physaddr + pkt->data_off, high_qw};
+	vst1q_u64((uint64_t *)txdp, descriptor); }
+
+static inline void
+vtx(volatile struct i40e_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
+i40e_xmit_pkts_vec(void *tx_queue, struct rte_mbuf **tx_pkts,
+		   uint16_t nb_pkts)
+{
+	struct i40e_tx_queue *txq = (struct i40e_tx_queue *)tx_queue;
+	volatile struct i40e_tx_desc *txdp;
+	struct i40e_tx_entry *txep;
+	uint16_t n, nb_commit, tx_id;
+	uint64_t flags = I40E_TD_CMD;
+	uint64_t rs = I40E_TX_DESC_CMD_RS | I40E_TD_CMD;
+	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)
+		i40e_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[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[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].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);
+	}
+
+	txq->tx_tail = tx_id;
+
+	I40E_PCI_REG_WRITE(txq->qtx_tail, txq->tx_tail);
+
+	return nb_pkts;
+}
+
+void __attribute__((cold))
+i40e_rx_queue_release_mbufs_vec(struct i40e_rx_queue *rxq) {
+	_i40e_rx_queue_release_mbufs_vec(rxq);
+}
+
+int __attribute__((cold))
+i40e_rxq_vec_setup(struct i40e_rx_queue *rxq) {
+	return i40e_rxq_vec_setup_default(rxq); }
+
+int __attribute__((cold))
+i40e_txq_vec_setup(struct i40e_tx_queue __rte_unused *txq) {
+	return 0;
+}
+
+int __attribute__((cold))
+i40e_rx_vec_dev_conf_condition_check(struct rte_eth_dev *dev) {
+	return i40e_rx_vec_dev_conf_condition_check_default(dev);
+}
--
2.4.11