54b79ac220
On Tx, lastseg->next is not being reset to null for multi segmented
packet and same mbuf can be used on Rx which has a stale mbuf entry into
mbuf->next.
On Rx, application receives mbuf with mbuf->next uninitialized though
mbuf->nb_segs is correct. Application iterates over all segments using
mbuf->next ignoring mbuf->nb_segs which leads to undefined behavior.
So earlier assumption of just having right value in mbuf->nb_segs is
enough, is incorrect. Mbuf must contain valid and synced value in
nb_segs and next pointer.
Fixes: 364eb0e466
("net/octeontx2: avoid per packet barrier with multi segment")
Cc: stable@dpdk.org
Signed-off-by: Sunil Kumar Kori <skori@marvell.com>
Acked-by: Nithin Dabilpuram <ndabilpuram@marvell.com>
431 lines
14 KiB
C
431 lines
14 KiB
C
/* SPDX-License-Identifier: BSD-3-Clause
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* Copyright(C) 2019 Marvell International Ltd.
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*/
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#include <rte_vect.h>
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#include "otx2_ethdev.h"
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#include "otx2_rx.h"
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#define NIX_DESCS_PER_LOOP 4
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#define CQE_CAST(x) ((struct nix_cqe_hdr_s *)(x))
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#define CQE_SZ(x) ((x) * NIX_CQ_ENTRY_SZ)
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static inline uint16_t
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nix_rx_nb_pkts(struct otx2_eth_rxq *rxq, const uint64_t wdata,
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const uint16_t pkts, const uint32_t qmask)
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{
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uint32_t available = rxq->available;
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/* Update the available count if cached value is not enough */
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if (unlikely(available < pkts)) {
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uint64_t reg, head, tail;
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/* Use LDADDA version to avoid reorder */
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reg = otx2_atomic64_add_sync(wdata, rxq->cq_status);
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/* CQ_OP_STATUS operation error */
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if (reg & BIT_ULL(CQ_OP_STAT_OP_ERR) ||
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reg & BIT_ULL(CQ_OP_STAT_CQ_ERR))
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return 0;
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tail = reg & 0xFFFFF;
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head = (reg >> 20) & 0xFFFFF;
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if (tail < head)
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available = tail - head + qmask + 1;
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else
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available = tail - head;
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rxq->available = available;
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}
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return RTE_MIN(pkts, available);
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}
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static __rte_always_inline uint16_t
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nix_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts,
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uint16_t pkts, const uint16_t flags)
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{
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struct otx2_eth_rxq *rxq = rx_queue;
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const uint64_t mbuf_init = rxq->mbuf_initializer;
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const void *lookup_mem = rxq->lookup_mem;
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const uint64_t data_off = rxq->data_off;
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const uintptr_t desc = rxq->desc;
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const uint64_t wdata = rxq->wdata;
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const uint32_t qmask = rxq->qmask;
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uint16_t packets = 0, nb_pkts;
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uint32_t head = rxq->head;
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struct nix_cqe_hdr_s *cq;
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struct rte_mbuf *mbuf;
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nb_pkts = nix_rx_nb_pkts(rxq, wdata, pkts, qmask);
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while (packets < nb_pkts) {
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/* Prefetch N desc ahead */
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rte_prefetch_non_temporal((void *)(desc +
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(CQE_SZ((head + 2) & qmask))));
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cq = (struct nix_cqe_hdr_s *)(desc + CQE_SZ(head));
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mbuf = nix_get_mbuf_from_cqe(cq, data_off);
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otx2_nix_cqe_to_mbuf(cq, cq->tag, mbuf, lookup_mem, mbuf_init,
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flags);
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otx2_nix_mbuf_to_tstamp(mbuf, rxq->tstamp, flags,
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(uint64_t *)((uint8_t *)mbuf + data_off));
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rx_pkts[packets++] = mbuf;
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otx2_prefetch_store_keep(mbuf);
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head++;
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head &= qmask;
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}
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rxq->head = head;
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rxq->available -= nb_pkts;
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/* Free all the CQs that we've processed */
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otx2_write64((wdata | nb_pkts), rxq->cq_door);
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return nb_pkts;
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}
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#if defined(RTE_ARCH_ARM64)
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static __rte_always_inline uint64_t
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nix_vlan_update(const uint64_t w2, uint64_t ol_flags, uint8x16_t *f)
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{
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if (w2 & BIT_ULL(21) /* vtag0_gone */) {
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ol_flags |= PKT_RX_VLAN | PKT_RX_VLAN_STRIPPED;
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*f = vsetq_lane_u16((uint16_t)(w2 >> 32), *f, 5);
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}
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return ol_flags;
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}
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static __rte_always_inline uint64_t
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nix_qinq_update(const uint64_t w2, uint64_t ol_flags, struct rte_mbuf *mbuf)
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{
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if (w2 & BIT_ULL(23) /* vtag1_gone */) {
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ol_flags |= PKT_RX_QINQ | PKT_RX_QINQ_STRIPPED;
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mbuf->vlan_tci_outer = (uint16_t)(w2 >> 48);
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}
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return ol_flags;
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}
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static __rte_always_inline uint16_t
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nix_recv_pkts_vector(void *rx_queue, struct rte_mbuf **rx_pkts,
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uint16_t pkts, const uint16_t flags)
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{
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struct otx2_eth_rxq *rxq = rx_queue; uint16_t packets = 0;
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uint64x2_t cq0_w8, cq1_w8, cq2_w8, cq3_w8, mbuf01, mbuf23;
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const uint64_t mbuf_initializer = rxq->mbuf_initializer;
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const uint64x2_t data_off = vdupq_n_u64(rxq->data_off);
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uint64_t ol_flags0, ol_flags1, ol_flags2, ol_flags3;
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uint64x2_t rearm0 = vdupq_n_u64(mbuf_initializer);
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uint64x2_t rearm1 = vdupq_n_u64(mbuf_initializer);
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uint64x2_t rearm2 = vdupq_n_u64(mbuf_initializer);
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uint64x2_t rearm3 = vdupq_n_u64(mbuf_initializer);
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struct rte_mbuf *mbuf0, *mbuf1, *mbuf2, *mbuf3;
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const uint16_t *lookup_mem = rxq->lookup_mem;
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const uint32_t qmask = rxq->qmask;
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const uint64_t wdata = rxq->wdata;
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const uintptr_t desc = rxq->desc;
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uint8x16_t f0, f1, f2, f3;
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uint32_t head = rxq->head;
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uint16_t pkts_left;
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pkts = nix_rx_nb_pkts(rxq, wdata, pkts, qmask);
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pkts_left = pkts & (NIX_DESCS_PER_LOOP - 1);
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/* Packets has to be floor-aligned to NIX_DESCS_PER_LOOP */
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pkts = RTE_ALIGN_FLOOR(pkts, NIX_DESCS_PER_LOOP);
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while (packets < pkts) {
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/* Exit loop if head is about to wrap and become unaligned */
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if (((head + NIX_DESCS_PER_LOOP - 1) & qmask) <
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NIX_DESCS_PER_LOOP) {
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pkts_left += (pkts - packets);
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break;
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}
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const uintptr_t cq0 = desc + CQE_SZ(head);
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/* Prefetch N desc ahead */
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rte_prefetch_non_temporal((void *)(cq0 + CQE_SZ(8)));
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rte_prefetch_non_temporal((void *)(cq0 + CQE_SZ(9)));
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rte_prefetch_non_temporal((void *)(cq0 + CQE_SZ(10)));
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rte_prefetch_non_temporal((void *)(cq0 + CQE_SZ(11)));
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/* Get NIX_RX_SG_S for size and buffer pointer */
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cq0_w8 = vld1q_u64((uint64_t *)(cq0 + CQE_SZ(0) + 64));
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cq1_w8 = vld1q_u64((uint64_t *)(cq0 + CQE_SZ(1) + 64));
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cq2_w8 = vld1q_u64((uint64_t *)(cq0 + CQE_SZ(2) + 64));
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cq3_w8 = vld1q_u64((uint64_t *)(cq0 + CQE_SZ(3) + 64));
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/* Extract mbuf from NIX_RX_SG_S */
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mbuf01 = vzip2q_u64(cq0_w8, cq1_w8);
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mbuf23 = vzip2q_u64(cq2_w8, cq3_w8);
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mbuf01 = vqsubq_u64(mbuf01, data_off);
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mbuf23 = vqsubq_u64(mbuf23, data_off);
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/* Move mbufs to scalar registers for future use */
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mbuf0 = (struct rte_mbuf *)vgetq_lane_u64(mbuf01, 0);
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mbuf1 = (struct rte_mbuf *)vgetq_lane_u64(mbuf01, 1);
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mbuf2 = (struct rte_mbuf *)vgetq_lane_u64(mbuf23, 0);
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mbuf3 = (struct rte_mbuf *)vgetq_lane_u64(mbuf23, 1);
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/* Mask to get packet len from NIX_RX_SG_S */
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const uint8x16_t shuf_msk = {
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0xFF, 0xFF, /* pkt_type set as unknown */
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0xFF, 0xFF, /* pkt_type set as unknown */
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0, 1, /* octet 1~0, low 16 bits pkt_len */
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0xFF, 0xFF, /* skip high 16 bits pkt_len, zero out */
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0, 1, /* octet 1~0, 16 bits data_len */
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0xFF, 0xFF,
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0xFF, 0xFF, 0xFF, 0xFF
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};
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/* Form the rx_descriptor_fields1 with pkt_len and data_len */
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f0 = vqtbl1q_u8(cq0_w8, shuf_msk);
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f1 = vqtbl1q_u8(cq1_w8, shuf_msk);
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f2 = vqtbl1q_u8(cq2_w8, shuf_msk);
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f3 = vqtbl1q_u8(cq3_w8, shuf_msk);
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/* Load CQE word0 and word 1 */
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uint64_t cq0_w0 = ((uint64_t *)(cq0 + CQE_SZ(0)))[0];
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uint64_t cq0_w1 = ((uint64_t *)(cq0 + CQE_SZ(0)))[1];
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uint64_t cq1_w0 = ((uint64_t *)(cq0 + CQE_SZ(1)))[0];
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uint64_t cq1_w1 = ((uint64_t *)(cq0 + CQE_SZ(1)))[1];
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uint64_t cq2_w0 = ((uint64_t *)(cq0 + CQE_SZ(2)))[0];
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uint64_t cq2_w1 = ((uint64_t *)(cq0 + CQE_SZ(2)))[1];
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uint64_t cq3_w0 = ((uint64_t *)(cq0 + CQE_SZ(3)))[0];
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uint64_t cq3_w1 = ((uint64_t *)(cq0 + CQE_SZ(3)))[1];
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if (flags & NIX_RX_OFFLOAD_RSS_F) {
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/* Fill rss in the rx_descriptor_fields1 */
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f0 = vsetq_lane_u32(cq0_w0, f0, 3);
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f1 = vsetq_lane_u32(cq1_w0, f1, 3);
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f2 = vsetq_lane_u32(cq2_w0, f2, 3);
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f3 = vsetq_lane_u32(cq3_w0, f3, 3);
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ol_flags0 = PKT_RX_RSS_HASH;
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ol_flags1 = PKT_RX_RSS_HASH;
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ol_flags2 = PKT_RX_RSS_HASH;
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ol_flags3 = PKT_RX_RSS_HASH;
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} else {
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ol_flags0 = 0; ol_flags1 = 0;
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ol_flags2 = 0; ol_flags3 = 0;
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}
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if (flags & NIX_RX_OFFLOAD_PTYPE_F) {
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/* Fill packet_type in the rx_descriptor_fields1 */
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f0 = vsetq_lane_u32(nix_ptype_get(lookup_mem, cq0_w1),
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f0, 0);
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f1 = vsetq_lane_u32(nix_ptype_get(lookup_mem, cq1_w1),
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f1, 0);
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f2 = vsetq_lane_u32(nix_ptype_get(lookup_mem, cq2_w1),
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f2, 0);
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f3 = vsetq_lane_u32(nix_ptype_get(lookup_mem, cq3_w1),
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f3, 0);
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}
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if (flags & NIX_RX_OFFLOAD_CHECKSUM_F) {
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ol_flags0 |= nix_rx_olflags_get(lookup_mem, cq0_w1);
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ol_flags1 |= nix_rx_olflags_get(lookup_mem, cq1_w1);
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ol_flags2 |= nix_rx_olflags_get(lookup_mem, cq2_w1);
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ol_flags3 |= nix_rx_olflags_get(lookup_mem, cq3_w1);
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}
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if (flags & NIX_RX_OFFLOAD_VLAN_STRIP_F) {
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uint64_t cq0_w2 = *(uint64_t *)(cq0 + CQE_SZ(0) + 16);
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uint64_t cq1_w2 = *(uint64_t *)(cq0 + CQE_SZ(1) + 16);
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uint64_t cq2_w2 = *(uint64_t *)(cq0 + CQE_SZ(2) + 16);
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uint64_t cq3_w2 = *(uint64_t *)(cq0 + CQE_SZ(3) + 16);
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ol_flags0 = nix_vlan_update(cq0_w2, ol_flags0, &f0);
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ol_flags1 = nix_vlan_update(cq1_w2, ol_flags1, &f1);
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ol_flags2 = nix_vlan_update(cq2_w2, ol_flags2, &f2);
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ol_flags3 = nix_vlan_update(cq3_w2, ol_flags3, &f3);
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ol_flags0 = nix_qinq_update(cq0_w2, ol_flags0, mbuf0);
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ol_flags1 = nix_qinq_update(cq1_w2, ol_flags1, mbuf1);
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ol_flags2 = nix_qinq_update(cq2_w2, ol_flags2, mbuf2);
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ol_flags3 = nix_qinq_update(cq3_w2, ol_flags3, mbuf3);
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}
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if (flags & NIX_RX_OFFLOAD_MARK_UPDATE_F) {
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ol_flags0 = nix_update_match_id(*(uint16_t *)
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(cq0 + CQE_SZ(0) + 38), ol_flags0, mbuf0);
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ol_flags1 = nix_update_match_id(*(uint16_t *)
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(cq0 + CQE_SZ(1) + 38), ol_flags1, mbuf1);
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ol_flags2 = nix_update_match_id(*(uint16_t *)
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(cq0 + CQE_SZ(2) + 38), ol_flags2, mbuf2);
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ol_flags3 = nix_update_match_id(*(uint16_t *)
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(cq0 + CQE_SZ(3) + 38), ol_flags3, mbuf3);
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}
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/* Form rearm_data with ol_flags */
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rearm0 = vsetq_lane_u64(ol_flags0, rearm0, 1);
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rearm1 = vsetq_lane_u64(ol_flags1, rearm1, 1);
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rearm2 = vsetq_lane_u64(ol_flags2, rearm2, 1);
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rearm3 = vsetq_lane_u64(ol_flags3, rearm3, 1);
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/* Update rx_descriptor_fields1 */
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vst1q_u64((uint64_t *)mbuf0->rx_descriptor_fields1, f0);
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vst1q_u64((uint64_t *)mbuf1->rx_descriptor_fields1, f1);
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vst1q_u64((uint64_t *)mbuf2->rx_descriptor_fields1, f2);
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vst1q_u64((uint64_t *)mbuf3->rx_descriptor_fields1, f3);
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/* Update rearm_data */
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vst1q_u64((uint64_t *)mbuf0->rearm_data, rearm0);
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vst1q_u64((uint64_t *)mbuf1->rearm_data, rearm1);
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vst1q_u64((uint64_t *)mbuf2->rearm_data, rearm2);
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vst1q_u64((uint64_t *)mbuf3->rearm_data, rearm3);
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/* Update that no more segments */
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mbuf0->next = NULL;
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mbuf1->next = NULL;
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mbuf2->next = NULL;
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mbuf3->next = NULL;
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/* Store the mbufs to rx_pkts */
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vst1q_u64((uint64_t *)&rx_pkts[packets], mbuf01);
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vst1q_u64((uint64_t *)&rx_pkts[packets + 2], mbuf23);
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/* Prefetch mbufs */
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otx2_prefetch_store_keep(mbuf0);
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otx2_prefetch_store_keep(mbuf1);
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otx2_prefetch_store_keep(mbuf2);
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otx2_prefetch_store_keep(mbuf3);
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/* Mark mempool obj as "get" as it is alloc'ed by NIX */
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__mempool_check_cookies(mbuf0->pool, (void **)&mbuf0, 1, 1);
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__mempool_check_cookies(mbuf1->pool, (void **)&mbuf1, 1, 1);
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__mempool_check_cookies(mbuf2->pool, (void **)&mbuf2, 1, 1);
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__mempool_check_cookies(mbuf3->pool, (void **)&mbuf3, 1, 1);
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/* Advance head pointer and packets */
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head += NIX_DESCS_PER_LOOP; head &= qmask;
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packets += NIX_DESCS_PER_LOOP;
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}
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rxq->head = head;
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rxq->available -= packets;
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rte_io_wmb();
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/* Free all the CQs that we've processed */
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otx2_write64((rxq->wdata | packets), rxq->cq_door);
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if (unlikely(pkts_left))
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packets += nix_recv_pkts(rx_queue, &rx_pkts[packets],
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pkts_left, flags);
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return packets;
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}
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#else
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static inline uint16_t
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nix_recv_pkts_vector(void *rx_queue, struct rte_mbuf **rx_pkts,
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uint16_t pkts, const uint16_t flags)
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{
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RTE_SET_USED(rx_queue);
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RTE_SET_USED(rx_pkts);
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RTE_SET_USED(pkts);
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RTE_SET_USED(flags);
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return 0;
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}
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#endif
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#define R(name, f6, f5, f4, f3, f2, f1, f0, flags) \
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static uint16_t __rte_noinline __rte_hot \
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otx2_nix_recv_pkts_ ## name(void *rx_queue, \
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struct rte_mbuf **rx_pkts, uint16_t pkts) \
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{ \
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return nix_recv_pkts(rx_queue, rx_pkts, pkts, (flags)); \
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} \
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\
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static uint16_t __rte_noinline __rte_hot \
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otx2_nix_recv_pkts_mseg_ ## name(void *rx_queue, \
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struct rte_mbuf **rx_pkts, uint16_t pkts) \
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{ \
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return nix_recv_pkts(rx_queue, rx_pkts, pkts, \
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(flags) | NIX_RX_MULTI_SEG_F); \
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} \
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\
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static uint16_t __rte_noinline __rte_hot \
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otx2_nix_recv_pkts_vec_ ## name(void *rx_queue, \
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struct rte_mbuf **rx_pkts, uint16_t pkts) \
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{ \
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/* TSTMP is not supported by vector */ \
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if ((flags) & NIX_RX_OFFLOAD_TSTAMP_F) \
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return 0; \
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return nix_recv_pkts_vector(rx_queue, rx_pkts, pkts, (flags)); \
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} \
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NIX_RX_FASTPATH_MODES
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#undef R
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static inline void
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pick_rx_func(struct rte_eth_dev *eth_dev,
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const eth_rx_burst_t rx_burst[2][2][2][2][2][2][2])
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{
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struct otx2_eth_dev *dev = otx2_eth_pmd_priv(eth_dev);
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/* [SEC] [TSTMP] [MARK] [VLAN] [CKSUM] [PTYPE] [RSS] */
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eth_dev->rx_pkt_burst = rx_burst
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[!!(dev->rx_offload_flags & NIX_RX_OFFLOAD_SECURITY_F)]
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[!!(dev->rx_offload_flags & NIX_RX_OFFLOAD_TSTAMP_F)]
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[!!(dev->rx_offload_flags & NIX_RX_OFFLOAD_MARK_UPDATE_F)]
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[!!(dev->rx_offload_flags & NIX_RX_OFFLOAD_VLAN_STRIP_F)]
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[!!(dev->rx_offload_flags & NIX_RX_OFFLOAD_CHECKSUM_F)]
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[!!(dev->rx_offload_flags & NIX_RX_OFFLOAD_PTYPE_F)]
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[!!(dev->rx_offload_flags & NIX_RX_OFFLOAD_RSS_F)];
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}
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void
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otx2_eth_set_rx_function(struct rte_eth_dev *eth_dev)
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{
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struct otx2_eth_dev *dev = otx2_eth_pmd_priv(eth_dev);
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const eth_rx_burst_t nix_eth_rx_burst[2][2][2][2][2][2][2] = {
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#define R(name, f6, f5, f4, f3, f2, f1, f0, flags) \
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[f6][f5][f4][f3][f2][f1][f0] = otx2_nix_recv_pkts_ ## name,
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NIX_RX_FASTPATH_MODES
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#undef R
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};
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const eth_rx_burst_t nix_eth_rx_burst_mseg[2][2][2][2][2][2][2] = {
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#define R(name, f6, f5, f4, f3, f2, f1, f0, flags) \
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[f6][f5][f4][f3][f2][f1][f0] = otx2_nix_recv_pkts_mseg_ ## name,
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NIX_RX_FASTPATH_MODES
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#undef R
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};
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const eth_rx_burst_t nix_eth_rx_vec_burst[2][2][2][2][2][2][2] = {
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#define R(name, f6, f5, f4, f3, f2, f1, f0, flags) \
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[f6][f5][f4][f3][f2][f1][f0] = otx2_nix_recv_pkts_vec_ ## name,
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NIX_RX_FASTPATH_MODES
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#undef R
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};
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/* For PTP enabled, scalar rx function should be chosen as most of the
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* PTP apps are implemented to rx burst 1 pkt.
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*/
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if (dev->scalar_ena || dev->rx_offloads & DEV_RX_OFFLOAD_TIMESTAMP)
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pick_rx_func(eth_dev, nix_eth_rx_burst);
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else
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pick_rx_func(eth_dev, nix_eth_rx_vec_burst);
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if (dev->rx_offloads & DEV_RX_OFFLOAD_SCATTER)
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pick_rx_func(eth_dev, nix_eth_rx_burst_mseg);
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/* Copy multi seg version with no offload for tear down sequence */
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if (rte_eal_process_type() == RTE_PROC_PRIMARY)
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dev->rx_pkt_burst_no_offload =
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nix_eth_rx_burst_mseg[0][0][0][0][0][0][0];
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rte_mb();
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}
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