f0c243a6cb
This patch adds SVE vector instructions to optimize Tx burst process. Signed-off-by: Chengwen Feng <fengchengwen@huawei.com> Signed-off-by: Wei Hu (Xavier) <xavier.huwei@huawei.com> Signed-off-by: Huisong Li <lihuisong@huawei.com>
473 lines
15 KiB
C
473 lines
15 KiB
C
/* SPDX-License-Identifier: BSD-3-Clause
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* Copyright(c) 2020 Hisilicon Limited.
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*/
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#include <arm_sve.h>
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#include <rte_io.h>
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#include <rte_ethdev_driver.h>
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#include "hns3_ethdev.h"
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#include "hns3_rxtx.h"
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#include "hns3_rxtx_vec.h"
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#define PG16_128BIT svwhilelt_b16(0, 8)
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#define PG16_256BIT svwhilelt_b16(0, 16)
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#define PG32_256BIT svwhilelt_b32(0, 8)
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#define PG64_64BIT svwhilelt_b64(0, 1)
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#define PG64_128BIT svwhilelt_b64(0, 2)
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#define PG64_256BIT svwhilelt_b64(0, 4)
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#define PG64_ALLBIT svptrue_b64()
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#define BD_SIZE 32
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#define BD_FIELD_ADDR_OFFSET 0
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#define BD_FIELD_L234_OFFSET 8
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#define BD_FIELD_XLEN_OFFSET 12
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#define BD_FIELD_RSS_OFFSET 16
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#define BD_FIELD_OL_OFFSET 24
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#define BD_FIELD_VALID_OFFSET 28
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typedef struct {
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uint32_t l234_info[HNS3_SVE_DEFAULT_DESCS_PER_LOOP];
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uint32_t ol_info[HNS3_SVE_DEFAULT_DESCS_PER_LOOP];
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uint32_t bd_base_info[HNS3_SVE_DEFAULT_DESCS_PER_LOOP];
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} HNS3_SVE_KEY_FIELD_S;
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static inline uint32_t
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hns3_desc_parse_field_sve(struct hns3_rx_queue *rxq,
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struct rte_mbuf **rx_pkts,
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HNS3_SVE_KEY_FIELD_S *key,
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uint32_t bd_vld_num)
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{
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uint32_t retcode = 0;
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uint32_t cksum_err;
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int ret, i;
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for (i = 0; i < (int)bd_vld_num; i++) {
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/* init rte_mbuf.rearm_data last 64-bit */
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rx_pkts[i]->ol_flags = PKT_RX_RSS_HASH;
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ret = hns3_handle_bdinfo(rxq, rx_pkts[i], key->bd_base_info[i],
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key->l234_info[i], &cksum_err);
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if (unlikely(ret)) {
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retcode |= 1u << i;
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continue;
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}
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rx_pkts[i]->packet_type = hns3_rx_calc_ptype(rxq,
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key->l234_info[i], key->ol_info[i]);
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if (likely(key->bd_base_info[i] & BIT(HNS3_RXD_L3L4P_B)))
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hns3_rx_set_cksum_flag(rx_pkts[i],
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rx_pkts[i]->packet_type, cksum_err);
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}
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return retcode;
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}
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static inline void
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hns3_rx_prefetch_mbuf_sve(struct hns3_entry *sw_ring)
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{
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svuint64_t prf1st = svld1_u64(PG64_256BIT, (uint64_t *)&sw_ring[0]);
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svuint64_t prf2st = svld1_u64(PG64_256BIT, (uint64_t *)&sw_ring[4]);
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svprfd_gather_u64base(PG64_256BIT, prf1st, SV_PLDL1KEEP);
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svprfd_gather_u64base(PG64_256BIT, prf2st, SV_PLDL1KEEP);
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}
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static inline uint16_t
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hns3_recv_burst_vec_sve(struct hns3_rx_queue *__restrict rxq,
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struct rte_mbuf **__restrict rx_pkts,
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uint16_t nb_pkts,
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uint64_t *bd_err_mask)
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{
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#define XLEN_ADJUST_LEN 32
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#define RSS_ADJUST_LEN 16
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#define GEN_VLD_U8_ZIP_INDEX svindex_s8(28, -4)
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uint16_t rx_id = rxq->next_to_use;
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struct hns3_entry *sw_ring = &rxq->sw_ring[rx_id];
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struct hns3_desc *rxdp = &rxq->rx_ring[rx_id];
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struct hns3_desc *rxdp2;
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HNS3_SVE_KEY_FIELD_S key_field;
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uint64_t bd_valid_num;
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uint32_t parse_retcode;
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uint16_t nb_rx = 0;
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int pos, offset;
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uint16_t xlen_adjust[XLEN_ADJUST_LEN] = {
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0, 0xffff, 1, 0xffff, /* 1st mbuf: pkt_len and dat_len */
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2, 0xffff, 3, 0xffff, /* 2st mbuf: pkt_len and dat_len */
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4, 0xffff, 5, 0xffff, /* 3st mbuf: pkt_len and dat_len */
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6, 0xffff, 7, 0xffff, /* 4st mbuf: pkt_len and dat_len */
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8, 0xffff, 9, 0xffff, /* 5st mbuf: pkt_len and dat_len */
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10, 0xffff, 11, 0xffff, /* 6st mbuf: pkt_len and dat_len */
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12, 0xffff, 13, 0xffff, /* 7st mbuf: pkt_len and dat_len */
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14, 0xffff, 15, 0xffff, /* 8st mbuf: pkt_len and dat_len */
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};
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uint32_t rss_adjust[RSS_ADJUST_LEN] = {
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0, 0xffff, /* 1st mbuf: rss */
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1, 0xffff, /* 2st mbuf: rss */
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2, 0xffff, /* 3st mbuf: rss */
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3, 0xffff, /* 4st mbuf: rss */
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4, 0xffff, /* 5st mbuf: rss */
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5, 0xffff, /* 6st mbuf: rss */
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6, 0xffff, /* 7st mbuf: rss */
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7, 0xffff, /* 8st mbuf: rss */
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};
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svbool_t pg32 = svwhilelt_b32(0, HNS3_SVE_DEFAULT_DESCS_PER_LOOP);
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svuint16_t xlen_tbl1 = svld1_u16(PG16_256BIT, xlen_adjust);
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svuint16_t xlen_tbl2 = svld1_u16(PG16_256BIT, &xlen_adjust[16]);
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svuint32_t rss_tbl1 = svld1_u32(PG32_256BIT, rss_adjust);
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svuint32_t rss_tbl2 = svld1_u32(PG32_256BIT, &rss_adjust[8]);
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for (pos = 0; pos < nb_pkts; pos += HNS3_SVE_DEFAULT_DESCS_PER_LOOP,
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rxdp += HNS3_SVE_DEFAULT_DESCS_PER_LOOP) {
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svuint64_t vld_clz, mbp1st, mbp2st, mbuf_init;
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svuint64_t xlen1st, xlen2st, rss1st, rss2st;
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svuint32_t l234, ol, vld, vld2, xlen, rss;
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svuint8_t vld_u8;
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/* calc how many bd valid: part 1 */
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vld = svld1_gather_u32offset_u32(pg32, (uint32_t *)rxdp,
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svindex_u32(BD_FIELD_VALID_OFFSET, BD_SIZE));
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vld2 = svlsl_n_u32_z(pg32, vld,
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HNS3_UINT32_BIT - 1 - HNS3_RXD_VLD_B);
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vld2 = svreinterpret_u32_s32(svasr_n_s32_z(pg32,
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svreinterpret_s32_u32(vld2), HNS3_UINT32_BIT - 1));
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/* load 4 mbuf pointer */
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mbp1st = svld1_u64(PG64_256BIT, (uint64_t *)&sw_ring[pos]);
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/* calc how many bd valid: part 2 */
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vld_u8 = svtbl_u8(svreinterpret_u8_u32(vld2),
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svreinterpret_u8_s8(GEN_VLD_U8_ZIP_INDEX));
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vld_clz = svnot_u64_z(PG64_64BIT, svreinterpret_u64_u8(vld_u8));
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vld_clz = svclz_u64_z(PG64_64BIT, vld_clz);
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svst1_u64(PG64_64BIT, &bd_valid_num, vld_clz);
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bd_valid_num /= HNS3_UINT8_BIT;
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/* load 4 more mbuf pointer */
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mbp2st = svld1_u64(PG64_256BIT, (uint64_t *)&sw_ring[pos + 4]);
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/* use offset to control below data load oper ordering */
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offset = rxq->offset_table[bd_valid_num];
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rxdp2 = rxdp + offset;
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/* store 4 mbuf pointer into rx_pkts */
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svst1_u64(PG64_256BIT, (uint64_t *)&rx_pkts[pos], mbp1st);
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/* load key field to vector reg */
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l234 = svld1_gather_u32offset_u32(pg32, (uint32_t *)rxdp2,
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svindex_u32(BD_FIELD_L234_OFFSET, BD_SIZE));
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ol = svld1_gather_u32offset_u32(pg32, (uint32_t *)rxdp2,
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svindex_u32(BD_FIELD_OL_OFFSET, BD_SIZE));
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/* store 4 mbuf pointer into rx_pkts again */
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svst1_u64(PG64_256BIT, (uint64_t *)&rx_pkts[pos + 4], mbp2st);
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/* load datalen, pktlen and rss_hash */
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xlen = svld1_gather_u32offset_u32(pg32, (uint32_t *)rxdp2,
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svindex_u32(BD_FIELD_XLEN_OFFSET, BD_SIZE));
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rss = svld1_gather_u32offset_u32(pg32, (uint32_t *)rxdp2,
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svindex_u32(BD_FIELD_RSS_OFFSET, BD_SIZE));
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/* store key field to stash buffer */
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svst1_u32(pg32, (uint32_t *)key_field.l234_info, l234);
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svst1_u32(pg32, (uint32_t *)key_field.bd_base_info, vld);
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svst1_u32(pg32, (uint32_t *)key_field.ol_info, ol);
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/* sub crc_len for pkt_len and data_len */
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xlen = svreinterpret_u32_u16(svsub_n_u16_z(PG16_256BIT,
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svreinterpret_u16_u32(xlen), rxq->crc_len));
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/* init mbuf_initializer */
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mbuf_init = svdup_n_u64(rxq->mbuf_initializer);
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/* extract datalen, pktlen and rss from xlen and rss */
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xlen1st = svreinterpret_u64_u16(
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svtbl_u16(svreinterpret_u16_u32(xlen), xlen_tbl1));
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xlen2st = svreinterpret_u64_u16(
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svtbl_u16(svreinterpret_u16_u32(xlen), xlen_tbl2));
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rss1st = svreinterpret_u64_u32(
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svtbl_u32(svreinterpret_u32_u32(rss), rss_tbl1));
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rss2st = svreinterpret_u64_u32(
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svtbl_u32(svreinterpret_u32_u32(rss), rss_tbl2));
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/* save mbuf_initializer */
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svst1_scatter_u64base_offset_u64(PG64_256BIT, mbp1st,
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offsetof(struct rte_mbuf, rearm_data), mbuf_init);
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svst1_scatter_u64base_offset_u64(PG64_256BIT, mbp2st,
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offsetof(struct rte_mbuf, rearm_data), mbuf_init);
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/* save datalen and pktlen and rss */
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svst1_scatter_u64base_offset_u64(PG64_256BIT, mbp1st,
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offsetof(struct rte_mbuf, pkt_len), xlen1st);
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svst1_scatter_u64base_offset_u64(PG64_256BIT, mbp1st,
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offsetof(struct rte_mbuf, hash.rss), rss1st);
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svst1_scatter_u64base_offset_u64(PG64_256BIT, mbp2st,
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offsetof(struct rte_mbuf, pkt_len), xlen2st);
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svst1_scatter_u64base_offset_u64(PG64_256BIT, mbp2st,
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offsetof(struct rte_mbuf, hash.rss), rss2st);
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rte_prefetch_non_temporal(rxdp +
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HNS3_SVE_DEFAULT_DESCS_PER_LOOP);
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parse_retcode = hns3_desc_parse_field_sve(rxq, &rx_pkts[pos],
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&key_field, bd_valid_num);
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if (unlikely(parse_retcode))
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(*bd_err_mask) |= ((uint64_t)parse_retcode) << pos;
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hns3_rx_prefetch_mbuf_sve(&sw_ring[pos +
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HNS3_SVE_DEFAULT_DESCS_PER_LOOP]);
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nb_rx += bd_valid_num;
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if (unlikely(bd_valid_num < HNS3_SVE_DEFAULT_DESCS_PER_LOOP))
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break;
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}
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rxq->rx_rearm_nb += nb_rx;
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rxq->next_to_use += nb_rx;
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if (rxq->next_to_use >= rxq->nb_rx_desc)
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rxq->next_to_use = 0;
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return nb_rx;
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}
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static inline void
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hns3_rxq_rearm_mbuf_sve(struct hns3_rx_queue *rxq)
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{
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#define REARM_LOOP_STEP_NUM 4
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struct hns3_entry *rxep = &rxq->sw_ring[rxq->rx_rearm_start];
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struct hns3_desc *rxdp = rxq->rx_ring + rxq->rx_rearm_start;
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struct hns3_entry *rxep_tmp = rxep;
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int i;
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if (unlikely(rte_mempool_get_bulk(rxq->mb_pool, (void *)rxep,
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HNS3_DEFAULT_RXQ_REARM_THRESH) < 0)) {
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rte_eth_devices[rxq->port_id].data->rx_mbuf_alloc_failed++;
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return;
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}
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for (i = 0; i < HNS3_DEFAULT_RXQ_REARM_THRESH; i += REARM_LOOP_STEP_NUM,
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rxep_tmp += REARM_LOOP_STEP_NUM) {
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svuint64_t prf = svld1_u64(PG64_256BIT, (uint64_t *)rxep_tmp);
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svprfd_gather_u64base(PG64_256BIT, prf, SV_PLDL1STRM);
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}
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for (i = 0; i < HNS3_DEFAULT_RXQ_REARM_THRESH; i += REARM_LOOP_STEP_NUM,
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rxep += REARM_LOOP_STEP_NUM, rxdp += REARM_LOOP_STEP_NUM) {
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uint64_t iova[REARM_LOOP_STEP_NUM];
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iova[0] = rxep[0].mbuf->buf_iova;
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iova[1] = rxep[1].mbuf->buf_iova;
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iova[2] = rxep[2].mbuf->buf_iova;
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iova[3] = rxep[3].mbuf->buf_iova;
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svuint64_t siova = svld1_u64(PG64_256BIT, iova);
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siova = svadd_n_u64_z(PG64_256BIT, siova, RTE_PKTMBUF_HEADROOM);
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svuint64_t ol_base = svdup_n_u64(0);
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svst1_scatter_u64offset_u64(PG64_256BIT,
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(uint64_t *)&rxdp[0].addr,
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svindex_u64(BD_FIELD_ADDR_OFFSET, BD_SIZE), siova);
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svst1_scatter_u64offset_u64(PG64_256BIT,
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(uint64_t *)&rxdp[0].addr,
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svindex_u64(BD_FIELD_OL_OFFSET, BD_SIZE), ol_base);
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}
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rxq->rx_rearm_start += HNS3_DEFAULT_RXQ_REARM_THRESH;
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if (rxq->rx_rearm_start >= rxq->nb_rx_desc)
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rxq->rx_rearm_start = 0;
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rxq->rx_rearm_nb -= HNS3_DEFAULT_RXQ_REARM_THRESH;
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hns3_write_reg_opt(rxq->io_head_reg, HNS3_DEFAULT_RXQ_REARM_THRESH);
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}
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uint16_t
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hns3_recv_pkts_vec_sve(void *__restrict rx_queue,
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struct rte_mbuf **__restrict rx_pkts,
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uint16_t nb_pkts)
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{
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struct hns3_rx_queue *rxq = rx_queue;
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struct hns3_desc *rxdp = &rxq->rx_ring[rxq->next_to_use];
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uint64_t bd_err_mask; /* bit mask indicate whick pkts is error */
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uint16_t nb_rx;
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rte_prefetch_non_temporal(rxdp);
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nb_pkts = RTE_MIN(nb_pkts, HNS3_DEFAULT_RX_BURST);
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nb_pkts = RTE_ALIGN_FLOOR(nb_pkts, HNS3_SVE_DEFAULT_DESCS_PER_LOOP);
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if (rxq->rx_rearm_nb > HNS3_DEFAULT_RXQ_REARM_THRESH)
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hns3_rxq_rearm_mbuf_sve(rxq);
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if (unlikely(!(rxdp->rx.bd_base_info &
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rte_cpu_to_le_32(1u << HNS3_RXD_VLD_B))))
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return 0;
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hns3_rx_prefetch_mbuf_sve(&rxq->sw_ring[rxq->next_to_use]);
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bd_err_mask = 0;
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nb_rx = hns3_recv_burst_vec_sve(rxq, rx_pkts, nb_pkts, &bd_err_mask);
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if (unlikely(bd_err_mask))
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nb_rx = hns3_rx_reassemble_pkts(rx_pkts, nb_rx, bd_err_mask);
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return nb_rx;
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}
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static inline void
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hns3_tx_free_buffers_sve(struct hns3_tx_queue *txq)
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{
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#define HNS3_SVE_CHECK_DESCS_PER_LOOP 8
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#define TX_VLD_U8_ZIP_INDEX svindex_u8(0, 4)
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svbool_t pg32 = svwhilelt_b32(0, HNS3_SVE_CHECK_DESCS_PER_LOOP);
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svuint32_t vld, vld2;
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svuint8_t vld_u8;
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uint64_t vld_all;
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struct hns3_desc *tx_desc;
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int i;
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/*
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* All mbufs can be released only when the VLD bits of all
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* descriptors in a batch are cleared.
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*/
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/* do logical OR operation for all desc's valid field */
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vld = svdup_n_u32(0);
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tx_desc = &txq->tx_ring[txq->next_to_clean];
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for (i = 0; i < txq->tx_rs_thresh; i += HNS3_SVE_CHECK_DESCS_PER_LOOP,
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tx_desc += HNS3_SVE_CHECK_DESCS_PER_LOOP) {
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vld2 = svld1_gather_u32offset_u32(pg32, (uint32_t *)tx_desc,
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svindex_u32(BD_FIELD_VALID_OFFSET, BD_SIZE));
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vld = svorr_u32_z(pg32, vld, vld2);
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}
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/* shift left and then right to get all valid bit */
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vld = svlsl_n_u32_z(pg32, vld,
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HNS3_UINT32_BIT - 1 - HNS3_TXD_VLD_B);
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vld = svreinterpret_u32_s32(svasr_n_s32_z(pg32,
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svreinterpret_s32_u32(vld), HNS3_UINT32_BIT - 1));
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/* use tbl to compress 32bit-lane to 8bit-lane */
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vld_u8 = svtbl_u8(svreinterpret_u8_u32(vld), TX_VLD_U8_ZIP_INDEX);
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/* dump compressed 64bit to variable */
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svst1_u64(PG64_64BIT, &vld_all, svreinterpret_u64_u8(vld_u8));
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if (vld_all > 0)
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return;
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hns3_tx_bulk_free_buffers(txq);
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}
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static inline void
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hns3_tx_fill_hw_ring_sve(struct hns3_tx_queue *txq,
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struct rte_mbuf **pkts,
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uint16_t nb_pkts)
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{
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#define DATA_OFF_LEN_VAL_MASK 0xFFFF
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struct hns3_desc *txdp = &txq->tx_ring[txq->next_to_use];
|
|
struct hns3_entry *tx_entry = &txq->sw_ring[txq->next_to_use];
|
|
const uint64_t valid_bit = (BIT(HNS3_TXD_VLD_B) | BIT(HNS3_TXD_FE_B)) <<
|
|
HNS3_UINT32_BIT;
|
|
svuint64_t base_addr, buf_iova, data_off, data_len, addr;
|
|
svuint64_t offsets = svindex_u64(0, BD_SIZE);
|
|
uint32_t i = 0;
|
|
svbool_t pg = svwhilelt_b64_u32(i, nb_pkts);
|
|
|
|
do {
|
|
base_addr = svld1_u64(pg, (uint64_t *)pkts);
|
|
/* calc mbuf's field buf_iova address */
|
|
buf_iova = svadd_n_u64_z(pg, base_addr,
|
|
offsetof(struct rte_mbuf, buf_iova));
|
|
/* calc mbuf's field data_off address */
|
|
data_off = svadd_n_u64_z(pg, base_addr,
|
|
offsetof(struct rte_mbuf, data_off));
|
|
/* calc mbuf's field data_len address */
|
|
data_len = svadd_n_u64_z(pg, base_addr,
|
|
offsetof(struct rte_mbuf, data_len));
|
|
/* store mbuf to tx_entry */
|
|
svst1_u64(pg, (uint64_t *)tx_entry, base_addr);
|
|
/* read pkts->buf_iova */
|
|
buf_iova = svld1_gather_u64base_u64(pg, buf_iova);
|
|
/* read pkts->data_off's 64bit val */
|
|
data_off = svld1_gather_u64base_u64(pg, data_off);
|
|
/* read pkts->data_len's 64bit val */
|
|
data_len = svld1_gather_u64base_u64(pg, data_len);
|
|
/* zero data_off high 48bit by svand ops */
|
|
data_off = svand_n_u64_z(pg, data_off, DATA_OFF_LEN_VAL_MASK);
|
|
/* zero data_len high 48bit by svand ops */
|
|
data_len = svand_n_u64_z(pg, data_len, DATA_OFF_LEN_VAL_MASK);
|
|
/* calc mbuf data region iova addr */
|
|
addr = svadd_u64_z(pg, buf_iova, data_off);
|
|
/* shift due data_len's offset is 2byte of BD's second 8byte */
|
|
data_len = svlsl_n_u64_z(pg, data_len, HNS3_UINT16_BIT);
|
|
/* save offset 0~7byte of every BD */
|
|
svst1_scatter_u64offset_u64(pg, (uint64_t *)&txdp->addr,
|
|
offsets, addr);
|
|
/* save offset 8~15byte of every BD */
|
|
svst1_scatter_u64offset_u64(pg, (uint64_t *)&txdp->tx.vlan_tag,
|
|
offsets, data_len);
|
|
/* save offset 16~23byte of every BD */
|
|
svst1_scatter_u64offset_u64(pg,
|
|
(uint64_t *)&txdp->tx.outer_vlan_tag,
|
|
offsets, svdup_n_u64(0));
|
|
/* save offset 24~31byte of every BD */
|
|
svst1_scatter_u64offset_u64(pg, (uint64_t *)&txdp->tx.paylen,
|
|
offsets, svdup_n_u64(valid_bit));
|
|
|
|
/* update index for next loop */
|
|
i += svcntd();
|
|
pkts += svcntd();
|
|
txdp += svcntd();
|
|
tx_entry += svcntd();
|
|
pg = svwhilelt_b64_u32(i, nb_pkts);
|
|
} while (svptest_any(svptrue_b64(), pg));
|
|
}
|
|
|
|
static uint16_t
|
|
hns3_xmit_fixed_burst_vec_sve(void *__restrict tx_queue,
|
|
struct rte_mbuf **__restrict tx_pkts,
|
|
uint16_t nb_pkts)
|
|
{
|
|
struct hns3_tx_queue *txq = (struct hns3_tx_queue *)tx_queue;
|
|
uint16_t nb_tx = 0;
|
|
|
|
if (txq->tx_bd_ready < txq->tx_free_thresh)
|
|
hns3_tx_free_buffers_sve(txq);
|
|
|
|
nb_pkts = RTE_MIN(txq->tx_bd_ready, nb_pkts);
|
|
if (unlikely(nb_pkts == 0)) {
|
|
txq->queue_full_cnt++;
|
|
return 0;
|
|
}
|
|
|
|
if (txq->next_to_use + nb_pkts > txq->nb_tx_desc) {
|
|
nb_tx = txq->nb_tx_desc - txq->next_to_use;
|
|
hns3_tx_fill_hw_ring_sve(txq, tx_pkts, nb_tx);
|
|
txq->next_to_use = 0;
|
|
}
|
|
|
|
hns3_tx_fill_hw_ring_sve(txq, tx_pkts + nb_tx, nb_pkts - nb_tx);
|
|
txq->next_to_use += nb_pkts - nb_tx;
|
|
|
|
txq->tx_bd_ready -= nb_pkts;
|
|
hns3_write_reg_opt(txq->io_tail_reg, nb_pkts);
|
|
|
|
return nb_pkts;
|
|
}
|
|
|
|
uint16_t
|
|
hns3_xmit_pkts_vec_sve(void *tx_queue,
|
|
struct rte_mbuf **tx_pkts,
|
|
uint16_t nb_pkts)
|
|
{
|
|
struct hns3_tx_queue *txq = (struct hns3_tx_queue *)tx_queue;
|
|
uint16_t ret, new_burst;
|
|
uint16_t nb_tx = 0;
|
|
|
|
while (nb_pkts) {
|
|
new_burst = RTE_MIN(nb_pkts, txq->tx_rs_thresh);
|
|
ret = hns3_xmit_fixed_burst_vec_sve(tx_queue, &tx_pkts[nb_tx],
|
|
new_burst);
|
|
nb_tx += ret;
|
|
nb_pkts -= ret;
|
|
if (ret < new_burst)
|
|
break;
|
|
}
|
|
|
|
return nb_tx;
|
|
}
|