drivers/net/iavf/iavf_rxtx_vec_avx2.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2019 Intel Corporation
   3  */
   4
   5 #include "iavf_rxtx_vec_common.h"
   6
   7 #include <x86intrin.h>
   8
   9 #ifndef __INTEL_COMPILER
  10 #pragma GCC diagnostic ignored "-Wcast-qual"
  11 #endif
  12
  13 static inline void
  14 iavf_rxq_rearm(struct iavf_rx_queue *rxq)
  15 {
  16         int i;
  17         uint16_t rx_id;
  18         volatile union iavf_rx_desc *rxdp;
  19         struct rte_mbuf **rxp = &rxq->sw_ring[rxq->rxrearm_start];
  20
  21         rxdp = rxq->rx_ring + rxq->rxrearm_start;
  22
  23         /* Pull 'n' more MBUFs into the software ring */
  24         if (rte_mempool_get_bulk(rxq->mp,
  25                                  (void *)rxp,
  26                                  IAVF_RXQ_REARM_THRESH) < 0) {
  27                 if (rxq->rxrearm_nb + IAVF_RXQ_REARM_THRESH >=
  28                     rxq->nb_rx_desc) {
  29                         __m128i dma_addr0;
  30
  31                         dma_addr0 = _mm_setzero_si128();
  32                         for (i = 0; i < IAVF_VPMD_DESCS_PER_LOOP; i++) {
  33                                 rxp[i] = &rxq->fake_mbuf;
  34                                 _mm_store_si128((__m128i *)&rxdp[i].read,
  35                                                 dma_addr0);
  36                         }
  37                 }
  38                 rte_eth_devices[rxq->port_id].data->rx_mbuf_alloc_failed +=
  39                         IAVF_RXQ_REARM_THRESH;
  40                 return;
  41         }
  42
  43 #ifndef RTE_LIBRTE_IAVF_16BYTE_RX_DESC
  44         struct rte_mbuf *mb0, *mb1;
  45         __m128i dma_addr0, dma_addr1;
  46         __m128i hdr_room = _mm_set_epi64x(RTE_PKTMBUF_HEADROOM,
  47                         RTE_PKTMBUF_HEADROOM);
  48         /* Initialize the mbufs in vector, process 2 mbufs in one loop */
  49         for (i = 0; i < IAVF_RXQ_REARM_THRESH; i += 2, rxp += 2) {
  50                 __m128i vaddr0, vaddr1;
  51
  52                 mb0 = rxp[0];
  53                 mb1 = rxp[1];
  54
  55                 /* load buf_addr(lo 64bit) and buf_physaddr(hi 64bit) */
  56                 RTE_BUILD_BUG_ON(offsetof(struct rte_mbuf, buf_physaddr) !=
  57                                 offsetof(struct rte_mbuf, buf_addr) + 8);
  58                 vaddr0 = _mm_loadu_si128((__m128i *)&mb0->buf_addr);
  59                 vaddr1 = _mm_loadu_si128((__m128i *)&mb1->buf_addr);
  60
  61                 /* convert pa to dma_addr hdr/data */
  62                 dma_addr0 = _mm_unpackhi_epi64(vaddr0, vaddr0);
  63                 dma_addr1 = _mm_unpackhi_epi64(vaddr1, vaddr1);
  64
  65                 /* add headroom to pa values */
  66                 dma_addr0 = _mm_add_epi64(dma_addr0, hdr_room);
  67                 dma_addr1 = _mm_add_epi64(dma_addr1, hdr_room);
  68
  69                 /* flush desc with pa dma_addr */
  70                 _mm_store_si128((__m128i *)&rxdp++->read, dma_addr0);
  71                 _mm_store_si128((__m128i *)&rxdp++->read, dma_addr1);
  72         }
  73 #else
  74         struct rte_mbuf *mb0, *mb1, *mb2, *mb3;
  75         __m256i dma_addr0_1, dma_addr2_3;
  76         __m256i hdr_room = _mm256_set1_epi64x(RTE_PKTMBUF_HEADROOM);
  77         /* Initialize the mbufs in vector, process 4 mbufs in one loop */
  78         for (i = 0; i < IAVF_RXQ_REARM_THRESH;
  79                         i += 4, rxp += 4, rxdp += 4) {
  80                 __m128i vaddr0, vaddr1, vaddr2, vaddr3;
  81                 __m256i vaddr0_1, vaddr2_3;
  82
  83                 mb0 = rxp[0];
  84                 mb1 = rxp[1];
  85                 mb2 = rxp[2];
  86                 mb3 = rxp[3];
  87
  88                 /* load buf_addr(lo 64bit) and buf_physaddr(hi 64bit) */
  89                 RTE_BUILD_BUG_ON(offsetof(struct rte_mbuf, buf_physaddr) !=
  90                                 offsetof(struct rte_mbuf, buf_addr) + 8);
  91                 vaddr0 = _mm_loadu_si128((__m128i *)&mb0->buf_addr);
  92                 vaddr1 = _mm_loadu_si128((__m128i *)&mb1->buf_addr);
  93                 vaddr2 = _mm_loadu_si128((__m128i *)&mb2->buf_addr);
  94                 vaddr3 = _mm_loadu_si128((__m128i *)&mb3->buf_addr);
  95
  96                 /**
  97                  * merge 0 & 1, by casting 0 to 256-bit and inserting 1
  98                  * into the high lanes. Similarly for 2 & 3
  99                  */
 100                 vaddr0_1 =
 101                         _mm256_inserti128_si256(_mm256_castsi128_si256(vaddr0),
 102                                                 vaddr1, 1);
 103                 vaddr2_3 =
 104                         _mm256_inserti128_si256(_mm256_castsi128_si256(vaddr2),
 105                                                 vaddr3, 1);
 106
 107                 /* convert pa to dma_addr hdr/data */
 108                 dma_addr0_1 = _mm256_unpackhi_epi64(vaddr0_1, vaddr0_1);
 109                 dma_addr2_3 = _mm256_unpackhi_epi64(vaddr2_3, vaddr2_3);
 110
 111                 /* add headroom to pa values */
 112                 dma_addr0_1 = _mm256_add_epi64(dma_addr0_1, hdr_room);
 113                 dma_addr2_3 = _mm256_add_epi64(dma_addr2_3, hdr_room);
 114
 115                 /* flush desc with pa dma_addr */
 116                 _mm256_store_si256((__m256i *)&rxdp->read, dma_addr0_1);
 117                 _mm256_store_si256((__m256i *)&(rxdp + 2)->read, dma_addr2_3);
 118         }
 119
 120 #endif
 121
 122         rxq->rxrearm_start += IAVF_RXQ_REARM_THRESH;
 123         if (rxq->rxrearm_start >= rxq->nb_rx_desc)
 124                 rxq->rxrearm_start = 0;
 125
 126         rxq->rxrearm_nb -= IAVF_RXQ_REARM_THRESH;
 127
 128         rx_id = (uint16_t)((rxq->rxrearm_start == 0) ?
 129                              (rxq->nb_rx_desc - 1) : (rxq->rxrearm_start - 1));
 130
 131         /* Update the tail pointer on the NIC */
 132         IAVF_PCI_REG_WRITE(rxq->qrx_tail, rx_id);
 133 }
 134
 135 #define PKTLEN_SHIFT     10
 136
 137 static inline uint16_t
 138 _iavf_recv_raw_pkts_vec_avx2(struct iavf_rx_queue *rxq,
 139                              struct rte_mbuf **rx_pkts,
 140                              uint16_t nb_pkts, uint8_t *split_packet)
 141 {
 142 #define IAVF_DESCS_PER_LOOP_AVX 8
 143
 144         /* const uint32_t *ptype_tbl = rxq->vsi->adapter->ptype_tbl; */
 145         const uint32_t *type_table = rxq->vsi->adapter->ptype_tbl;
 146
 147         const __m256i mbuf_init = _mm256_set_epi64x(0, 0,
 148                         0, rxq->mbuf_initializer);
 149         /* struct iavf_rx_entry *sw_ring = &rxq->sw_ring[rxq->rx_tail]; */
 150         struct rte_mbuf **sw_ring = &rxq->sw_ring[rxq->rx_tail];
 151         volatile union iavf_rx_desc *rxdp = rxq->rx_ring + rxq->rx_tail;
 152         const int avx_aligned = ((rxq->rx_tail & 1) == 0);
 153
 154         rte_prefetch0(rxdp);
 155
 156         /* nb_pkts has to be floor-aligned to IAVF_DESCS_PER_LOOP_AVX */
 157         nb_pkts = RTE_ALIGN_FLOOR(nb_pkts, IAVF_DESCS_PER_LOOP_AVX);
 158
 159         /* See if we need to rearm the RX queue - gives the prefetch a bit
 160          * of time to act
 161          */
 162         if (rxq->rxrearm_nb > IAVF_RXQ_REARM_THRESH)
 163                 iavf_rxq_rearm(rxq);
 164
 165         /* Before we start moving massive data around, check to see if
 166          * there is actually a packet available
 167          */
 168         if (!(rxdp->wb.qword1.status_error_len &
 169                         rte_cpu_to_le_32(1 << IAVF_RX_DESC_STATUS_DD_SHIFT)))
 170                 return 0;
 171
 172         /* constants used in processing loop */
 173         const __m256i crc_adjust =
 174                 _mm256_set_epi16
 175                         (/* first descriptor */
 176                          0, 0, 0,       /* ignore non-length fields */
 177                          -rxq->crc_len, /* sub crc on data_len */
 178                          0,             /* ignore high-16bits of pkt_len */
 179                          -rxq->crc_len, /* sub crc on pkt_len */
 180                          0, 0,          /* ignore pkt_type field */
 181                          /* second descriptor */
 182                          0, 0, 0,       /* ignore non-length fields */
 183                          -rxq->crc_len, /* sub crc on data_len */
 184                          0,             /* ignore high-16bits of pkt_len */
 185                          -rxq->crc_len, /* sub crc on pkt_len */
 186                          0, 0           /* ignore pkt_type field */
 187                         );
 188
 189         /* 8 packets DD mask, LSB in each 32-bit value */
 190         const __m256i dd_check = _mm256_set1_epi32(1);
 191
 192         /* 8 packets EOP mask, second-LSB in each 32-bit value */
 193         const __m256i eop_check = _mm256_slli_epi32(dd_check,
 194                         IAVF_RX_DESC_STATUS_EOF_SHIFT);
 195
 196         /* mask to shuffle from desc. to mbuf (2 descriptors)*/
 197         const __m256i shuf_msk =
 198                 _mm256_set_epi8
 199                         (/* first descriptor */
 200                          7, 6, 5, 4,  /* octet 4~7, 32bits rss */
 201                          3, 2,        /* octet 2~3, low 16 bits vlan_macip */
 202                          15, 14,      /* octet 15~14, 16 bits data_len */
 203                          0xFF, 0xFF,  /* skip high 16 bits pkt_len, zero out */
 204                          15, 14,      /* octet 15~14, low 16 bits pkt_len */
 205                          0xFF, 0xFF,  /* pkt_type set as unknown */
 206                          0xFF, 0xFF,  /*pkt_type set as unknown */
 207                          /* second descriptor */
 208                          7, 6, 5, 4,  /* octet 4~7, 32bits rss */
 209                          3, 2,        /* octet 2~3, low 16 bits vlan_macip */
 210                          15, 14,      /* octet 15~14, 16 bits data_len */
 211                          0xFF, 0xFF,  /* skip high 16 bits pkt_len, zero out */
 212                          15, 14,      /* octet 15~14, low 16 bits pkt_len */
 213                          0xFF, 0xFF,  /* pkt_type set as unknown */
 214                          0xFF, 0xFF   /*pkt_type set as unknown */
 215                         );
 216         /**
 217          * compile-time check the above crc and shuffle layout is correct.
 218          * NOTE: the first field (lowest address) is given last in set_epi
 219          * calls above.
 220          */
 221         RTE_BUILD_BUG_ON(offsetof(struct rte_mbuf, pkt_len) !=
 222                         offsetof(struct rte_mbuf, rx_descriptor_fields1) + 4);
 223         RTE_BUILD_BUG_ON(offsetof(struct rte_mbuf, data_len) !=
 224                         offsetof(struct rte_mbuf, rx_descriptor_fields1) + 8);
 225         RTE_BUILD_BUG_ON(offsetof(struct rte_mbuf, vlan_tci) !=
 226                         offsetof(struct rte_mbuf, rx_descriptor_fields1) + 10);
 227         RTE_BUILD_BUG_ON(offsetof(struct rte_mbuf, hash) !=
 228                         offsetof(struct rte_mbuf, rx_descriptor_fields1) + 12);
 229
 230         /* Status/Error flag masks */
 231         /**
 232          * mask everything except RSS, flow director and VLAN flags
 233          * bit2 is for VLAN tag, bit11 for flow director indication
 234          * bit13:12 for RSS indication. Bits 3-5 of error
 235          * field (bits 22-24) are for IP/L4 checksum errors
 236          */
 237         const __m256i flags_mask =
 238                  _mm256_set1_epi32((1 << 2) | (1 << 11) |
 239                                    (3 << 12) | (7 << 22));
 240         /**
 241          * data to be shuffled by result of flag mask. If VLAN bit is set,
 242          * (bit 2), then position 4 in this array will be used in the
 243          * destination
 244          */
 245         const __m256i vlan_flags_shuf =
 246                 _mm256_set_epi32(0, 0, PKT_RX_VLAN | PKT_RX_VLAN_STRIPPED, 0,
 247                                  0, 0, PKT_RX_VLAN | PKT_RX_VLAN_STRIPPED, 0);
 248         /**
 249          * data to be shuffled by result of flag mask, shifted down 11.
 250          * If RSS/FDIR bits are set, shuffle moves appropriate flags in
 251          * place.
 252          */
 253         const __m256i rss_flags_shuf =
 254                 _mm256_set_epi8(0, 0, 0, 0, 0, 0, 0, 0,
 255                                 PKT_RX_RSS_HASH | PKT_RX_FDIR, PKT_RX_RSS_HASH,
 256                                 0, 0, 0, 0, PKT_RX_FDIR, 0,/* end up 128-bits */
 257                                 0, 0, 0, 0, 0, 0, 0, 0,
 258                                 PKT_RX_RSS_HASH | PKT_RX_FDIR, PKT_RX_RSS_HASH,
 259                                 0, 0, 0, 0, PKT_RX_FDIR, 0);
 260
 261         /**
 262          * data to be shuffled by the result of the flags mask shifted by 22
 263          * bits.  This gives use the l3_l4 flags.
 264          */
 265         const __m256i l3_l4_flags_shuf = _mm256_set_epi8(0, 0, 0, 0, 0, 0, 0, 0,
 266                         /* shift right 1 bit to make sure it not exceed 255 */
 267                         (PKT_RX_EIP_CKSUM_BAD | PKT_RX_L4_CKSUM_BAD |
 268                          PKT_RX_IP_CKSUM_BAD) >> 1,
 269                         (PKT_RX_IP_CKSUM_GOOD | PKT_RX_EIP_CKSUM_BAD |
 270                          PKT_RX_L4_CKSUM_BAD) >> 1,
 271                         (PKT_RX_EIP_CKSUM_BAD | PKT_RX_IP_CKSUM_BAD) >> 1,
 272                         (PKT_RX_IP_CKSUM_GOOD | PKT_RX_EIP_CKSUM_BAD) >> 1,
 273                         (PKT_RX_L4_CKSUM_BAD | PKT_RX_IP_CKSUM_BAD) >> 1,
 274                         (PKT_RX_IP_CKSUM_GOOD | PKT_RX_L4_CKSUM_BAD) >> 1,
 275                         PKT_RX_IP_CKSUM_BAD >> 1,
 276                         (PKT_RX_IP_CKSUM_GOOD | PKT_RX_L4_CKSUM_GOOD) >> 1,
 277                         /* second 128-bits */
 278                         0, 0, 0, 0, 0, 0, 0, 0,
 279                         (PKT_RX_EIP_CKSUM_BAD | PKT_RX_L4_CKSUM_BAD |
 280                          PKT_RX_IP_CKSUM_BAD) >> 1,
 281                         (PKT_RX_IP_CKSUM_GOOD | PKT_RX_EIP_CKSUM_BAD |
 282                          PKT_RX_L4_CKSUM_BAD) >> 1,
 283                         (PKT_RX_EIP_CKSUM_BAD | PKT_RX_IP_CKSUM_BAD) >> 1,
 284                         (PKT_RX_IP_CKSUM_GOOD | PKT_RX_EIP_CKSUM_BAD) >> 1,
 285                         (PKT_RX_L4_CKSUM_BAD | PKT_RX_IP_CKSUM_BAD) >> 1,
 286                         (PKT_RX_IP_CKSUM_GOOD | PKT_RX_L4_CKSUM_BAD) >> 1,
 287                         PKT_RX_IP_CKSUM_BAD >> 1,
 288                         (PKT_RX_IP_CKSUM_GOOD | PKT_RX_L4_CKSUM_GOOD) >> 1);
 289
 290         const __m256i cksum_mask =
 291                  _mm256_set1_epi32(PKT_RX_IP_CKSUM_GOOD | PKT_RX_IP_CKSUM_BAD |
 292                                    PKT_RX_L4_CKSUM_GOOD | PKT_RX_L4_CKSUM_BAD |
 293                                    PKT_RX_EIP_CKSUM_BAD);
 294
 295         RTE_SET_USED(avx_aligned); /* for 32B descriptors we don't use this */
 296
 297         uint16_t i, received;
 298
 299         for (i = 0, received = 0; i < nb_pkts;
 300              i += IAVF_DESCS_PER_LOOP_AVX,
 301              rxdp += IAVF_DESCS_PER_LOOP_AVX) {
 302                 /* step 1, copy over 8 mbuf pointers to rx_pkts array */
 303                 _mm256_storeu_si256((void *)&rx_pkts[i],
 304                                     _mm256_loadu_si256((void *)&sw_ring[i]));
 305 #ifdef RTE_ARCH_X86_64
 306                 _mm256_storeu_si256
 307                         ((void *)&rx_pkts[i + 4],
 308                          _mm256_loadu_si256((void *)&sw_ring[i + 4]));
 309 #endif
 310
 311                 __m256i raw_desc0_1, raw_desc2_3, raw_desc4_5, raw_desc6_7;
 312 #ifdef RTE_LIBRTE_IAVF_16BYTE_RX_DESC
 313                 /* for AVX we need alignment otherwise loads are not atomic */
 314                 if (avx_aligned) {
 315                         /* load in descriptors, 2 at a time, in reverse order */
 316                         raw_desc6_7 = _mm256_load_si256((void *)(rxdp + 6));
 317                         rte_compiler_barrier();
 318                         raw_desc4_5 = _mm256_load_si256((void *)(rxdp + 4));
 319                         rte_compiler_barrier();
 320                         raw_desc2_3 = _mm256_load_si256((void *)(rxdp + 2));
 321                         rte_compiler_barrier();
 322                         raw_desc0_1 = _mm256_load_si256((void *)(rxdp + 0));
 323                 } else
 324 #endif
 325                 {
 326                         const __m128i raw_desc7 =
 327                                 _mm_load_si128((void *)(rxdp + 7));
 328                         rte_compiler_barrier();
 329                         const __m128i raw_desc6 =
 330                                 _mm_load_si128((void *)(rxdp + 6));
 331                         rte_compiler_barrier();
 332                         const __m128i raw_desc5 =
 333                                 _mm_load_si128((void *)(rxdp + 5));
 334                         rte_compiler_barrier();
 335                         const __m128i raw_desc4 =
 336                                 _mm_load_si128((void *)(rxdp + 4));
 337                         rte_compiler_barrier();
 338                         const __m128i raw_desc3 =
 339                                 _mm_load_si128((void *)(rxdp + 3));
 340                         rte_compiler_barrier();
 341                         const __m128i raw_desc2 =
 342                                 _mm_load_si128((void *)(rxdp + 2));
 343                         rte_compiler_barrier();
 344                         const __m128i raw_desc1 =
 345                                 _mm_load_si128((void *)(rxdp + 1));
 346                         rte_compiler_barrier();
 347                         const __m128i raw_desc0 =
 348                                 _mm_load_si128((void *)(rxdp + 0));
 349
 350                         raw_desc6_7 =
 351                                 _mm256_inserti128_si256
 352                                         (_mm256_castsi128_si256(raw_desc6),
 353                                          raw_desc7, 1);
 354                         raw_desc4_5 =
 355                                 _mm256_inserti128_si256
 356                                         (_mm256_castsi128_si256(raw_desc4),
 357                                          raw_desc5, 1);
 358                         raw_desc2_3 =
 359                                 _mm256_inserti128_si256
 360                                         (_mm256_castsi128_si256(raw_desc2),
 361                                          raw_desc3, 1);
 362                         raw_desc0_1 =
 363                                 _mm256_inserti128_si256
 364                                         (_mm256_castsi128_si256(raw_desc0),
 365                                          raw_desc1, 1);
 366                 }
 367
 368                 if (split_packet) {
 369                         int j;
 370
 371                         for (j = 0; j < IAVF_DESCS_PER_LOOP_AVX; j++)
 372                                 rte_mbuf_prefetch_part2(rx_pkts[i + j]);
 373                 }
 374
 375                 /**
 376                  * convert descriptors 4-7 into mbufs, adjusting length and
 377                  * re-arranging fields. Then write into the mbuf
 378                  */
 379                 const __m256i len6_7 = _mm256_slli_epi32(raw_desc6_7,
 380                                                          PKTLEN_SHIFT);
 381                 const __m256i len4_5 = _mm256_slli_epi32(raw_desc4_5,
 382                                                          PKTLEN_SHIFT);
 383                 const __m256i desc6_7 = _mm256_blend_epi16(raw_desc6_7,
 384                                                            len6_7, 0x80);
 385                 const __m256i desc4_5 = _mm256_blend_epi16(raw_desc4_5,
 386                                                            len4_5, 0x80);
 387                 __m256i mb6_7 = _mm256_shuffle_epi8(desc6_7, shuf_msk);
 388                 __m256i mb4_5 = _mm256_shuffle_epi8(desc4_5, shuf_msk);
 389
 390                 mb6_7 = _mm256_add_epi16(mb6_7, crc_adjust);
 391                 mb4_5 = _mm256_add_epi16(mb4_5, crc_adjust);
 392                 /**
 393                  * to get packet types, shift 64-bit values down 30 bits
 394                  * and so ptype is in lower 8-bits in each
 395                  */
 396                 const __m256i ptypes6_7 = _mm256_srli_epi64(desc6_7, 30);
 397                 const __m256i ptypes4_5 = _mm256_srli_epi64(desc4_5, 30);
 398                 const uint8_t ptype7 = _mm256_extract_epi8(ptypes6_7, 24);
 399                 const uint8_t ptype6 = _mm256_extract_epi8(ptypes6_7, 8);
 400                 const uint8_t ptype5 = _mm256_extract_epi8(ptypes4_5, 24);
 401                 const uint8_t ptype4 = _mm256_extract_epi8(ptypes4_5, 8);
 402
 403                 mb6_7 = _mm256_insert_epi32(mb6_7, type_table[ptype7], 4);
 404                 mb6_7 = _mm256_insert_epi32(mb6_7, type_table[ptype6], 0);
 405                 mb4_5 = _mm256_insert_epi32(mb4_5, type_table[ptype5], 4);
 406                 mb4_5 = _mm256_insert_epi32(mb4_5, type_table[ptype4], 0);
 407                 /* merge the status bits into one register */
 408                 const __m256i status4_7 = _mm256_unpackhi_epi32(desc6_7,
 409                                 desc4_5);
 410
 411                 /**
 412                  * convert descriptors 0-3 into mbufs, adjusting length and
 413                  * re-arranging fields. Then write into the mbuf
 414                  */
 415                 const __m256i len2_3 = _mm256_slli_epi32(raw_desc2_3,
 416                                                          PKTLEN_SHIFT);
 417                 const __m256i len0_1 = _mm256_slli_epi32(raw_desc0_1,
 418                                                          PKTLEN_SHIFT);
 419                 const __m256i desc2_3 = _mm256_blend_epi16(raw_desc2_3,
 420                                                            len2_3, 0x80);
 421                 const __m256i desc0_1 = _mm256_blend_epi16(raw_desc0_1,
 422                                                            len0_1, 0x80);
 423                 __m256i mb2_3 = _mm256_shuffle_epi8(desc2_3, shuf_msk);
 424                 __m256i mb0_1 = _mm256_shuffle_epi8(desc0_1, shuf_msk);
 425
 426                 mb2_3 = _mm256_add_epi16(mb2_3, crc_adjust);
 427                 mb0_1 = _mm256_add_epi16(mb0_1, crc_adjust);
 428                 /* get the packet types */
 429                 const __m256i ptypes2_3 = _mm256_srli_epi64(desc2_3, 30);
 430                 const __m256i ptypes0_1 = _mm256_srli_epi64(desc0_1, 30);
 431                 const uint8_t ptype3 = _mm256_extract_epi8(ptypes2_3, 24);
 432                 const uint8_t ptype2 = _mm256_extract_epi8(ptypes2_3, 8);
 433                 const uint8_t ptype1 = _mm256_extract_epi8(ptypes0_1, 24);
 434                 const uint8_t ptype0 = _mm256_extract_epi8(ptypes0_1, 8);
 435
 436                 mb2_3 = _mm256_insert_epi32(mb2_3, type_table[ptype3], 4);
 437                 mb2_3 = _mm256_insert_epi32(mb2_3, type_table[ptype2], 0);
 438                 mb0_1 = _mm256_insert_epi32(mb0_1, type_table[ptype1], 4);
 439                 mb0_1 = _mm256_insert_epi32(mb0_1, type_table[ptype0], 0);
 440                 /* merge the status bits into one register */
 441                 const __m256i status0_3 = _mm256_unpackhi_epi32(desc2_3,
 442                                                                 desc0_1);
 443
 444                 /**
 445                  * take the two sets of status bits and merge to one
 446                  * After merge, the packets status flags are in the
 447                  * order (hi->lo): [1, 3, 5, 7, 0, 2, 4, 6]
 448                  */
 449                 __m256i status0_7 = _mm256_unpacklo_epi64(status4_7,
 450                                                           status0_3);
 451
 452                 /* now do flag manipulation */
 453
 454                 /* get only flag/error bits we want */
 455                 const __m256i flag_bits =
 456                         _mm256_and_si256(status0_7, flags_mask);
 457                 /* set vlan and rss flags */
 458                 const __m256i vlan_flags =
 459                         _mm256_shuffle_epi8(vlan_flags_shuf, flag_bits);
 460                 const __m256i rss_flags =
 461                         _mm256_shuffle_epi8(rss_flags_shuf,
 462                                             _mm256_srli_epi32(flag_bits, 11));
 463                 /**
 464                  * l3_l4_error flags, shuffle, then shift to correct adjustment
 465                  * of flags in flags_shuf, and finally mask out extra bits
 466                  */
 467                 __m256i l3_l4_flags = _mm256_shuffle_epi8(l3_l4_flags_shuf,
 468                                 _mm256_srli_epi32(flag_bits, 22));
 469                 l3_l4_flags = _mm256_slli_epi32(l3_l4_flags, 1);
 470                 l3_l4_flags = _mm256_and_si256(l3_l4_flags, cksum_mask);
 471
 472                 /* merge flags */
 473                 const __m256i mbuf_flags = _mm256_or_si256(l3_l4_flags,
 474                                 _mm256_or_si256(rss_flags, vlan_flags));
 475                 /**
 476                  * At this point, we have the 8 sets of flags in the low 16-bits
 477                  * of each 32-bit value in vlan0.
 478                  * We want to extract these, and merge them with the mbuf init
 479                  * data so we can do a single write to the mbuf to set the flags
 480                  * and all the other initialization fields. Extracting the
 481                  * appropriate flags means that we have to do a shift and blend
 482                  * for each mbuf before we do the write. However, we can also
 483                  * add in the previously computed rx_descriptor fields to
 484                  * make a single 256-bit write per mbuf
 485                  */
 486                 /* check the structure matches expectations */
 487                 RTE_BUILD_BUG_ON(offsetof(struct rte_mbuf, ol_flags) !=
 488                                  offsetof(struct rte_mbuf, rearm_data) + 8);
 489                 RTE_BUILD_BUG_ON(offsetof(struct rte_mbuf, rearm_data) !=
 490                                  RTE_ALIGN(offsetof(struct rte_mbuf,
 491                                                     rearm_data),
 492                                            16));
 493                 /* build up data and do writes */
 494                 __m256i rearm0, rearm1, rearm2, rearm3, rearm4, rearm5,
 495                         rearm6, rearm7;
 496                 rearm6 = _mm256_blend_epi32(mbuf_init,
 497                                             _mm256_slli_si256(mbuf_flags, 8),
 498                                             0x04);
 499                 rearm4 = _mm256_blend_epi32(mbuf_init,
 500                                             _mm256_slli_si256(mbuf_flags, 4),
 501                                             0x04);
 502                 rearm2 = _mm256_blend_epi32(mbuf_init, mbuf_flags, 0x04);
 503                 rearm0 = _mm256_blend_epi32(mbuf_init,
 504                                             _mm256_srli_si256(mbuf_flags, 4),
 505                                             0x04);
 506                 /* permute to add in the rx_descriptor e.g. rss fields */
 507                 rearm6 = _mm256_permute2f128_si256(rearm6, mb6_7, 0x20);
 508                 rearm4 = _mm256_permute2f128_si256(rearm4, mb4_5, 0x20);
 509                 rearm2 = _mm256_permute2f128_si256(rearm2, mb2_3, 0x20);
 510                 rearm0 = _mm256_permute2f128_si256(rearm0, mb0_1, 0x20);
 511                 /* write to mbuf */
 512                 _mm256_storeu_si256((__m256i *)&rx_pkts[i + 6]->rearm_data,
 513                                     rearm6);
 514                 _mm256_storeu_si256((__m256i *)&rx_pkts[i + 4]->rearm_data,
 515                                     rearm4);
 516                 _mm256_storeu_si256((__m256i *)&rx_pkts[i + 2]->rearm_data,
 517                                     rearm2);
 518                 _mm256_storeu_si256((__m256i *)&rx_pkts[i + 0]->rearm_data,
 519                                     rearm0);
 520
 521                 /* repeat for the odd mbufs */
 522                 const __m256i odd_flags =
 523                         _mm256_castsi128_si256
 524                                 (_mm256_extracti128_si256(mbuf_flags, 1));
 525                 rearm7 = _mm256_blend_epi32(mbuf_init,
 526                                             _mm256_slli_si256(odd_flags, 8),
 527                                             0x04);
 528                 rearm5 = _mm256_blend_epi32(mbuf_init,
 529                                             _mm256_slli_si256(odd_flags, 4),
 530                                             0x04);
 531                 rearm3 = _mm256_blend_epi32(mbuf_init, odd_flags, 0x04);
 532                 rearm1 = _mm256_blend_epi32(mbuf_init,
 533                                             _mm256_srli_si256(odd_flags, 4),
 534                                             0x04);
 535                 /* since odd mbufs are already in hi 128-bits use blend */
 536                 rearm7 = _mm256_blend_epi32(rearm7, mb6_7, 0xF0);
 537                 rearm5 = _mm256_blend_epi32(rearm5, mb4_5, 0xF0);
 538                 rearm3 = _mm256_blend_epi32(rearm3, mb2_3, 0xF0);
 539                 rearm1 = _mm256_blend_epi32(rearm1, mb0_1, 0xF0);
 540                 /* again write to mbufs */
 541                 _mm256_storeu_si256((__m256i *)&rx_pkts[i + 7]->rearm_data,
 542                                     rearm7);
 543                 _mm256_storeu_si256((__m256i *)&rx_pkts[i + 5]->rearm_data,
 544                                     rearm5);
 545                 _mm256_storeu_si256((__m256i *)&rx_pkts[i + 3]->rearm_data,
 546                                     rearm3);
 547                 _mm256_storeu_si256((__m256i *)&rx_pkts[i + 1]->rearm_data,
 548                                     rearm1);
 549
 550                 /* extract and record EOP bit */
 551                 if (split_packet) {
 552                         const __m128i eop_mask =
 553                                 _mm_set1_epi16(1 << IAVF_RX_DESC_STATUS_EOF_SHIFT);
 554                         const __m256i eop_bits256 = _mm256_and_si256(status0_7,
 555                                                                      eop_check);
 556                         /* pack status bits into a single 128-bit register */
 557                         const __m128i eop_bits =
 558                                 _mm_packus_epi32
 559                                         (_mm256_castsi256_si128(eop_bits256),
 560                                          _mm256_extractf128_si256(eop_bits256,
 561                                                                   1));
 562                         /**
 563                          * flip bits, and mask out the EOP bit, which is now
 564                          * a split-packet bit i.e. !EOP, rather than EOP one.
 565                          */
 566                         __m128i split_bits = _mm_andnot_si128(eop_bits,
 567                                         eop_mask);
 568                         /**
 569                          * eop bits are out of order, so we need to shuffle them
 570                          * back into order again. In doing so, only use low 8
 571                          * bits, which acts like another pack instruction
 572                          * The original order is (hi->lo): 1,3,5,7,0,2,4,6
 573                          * [Since we use epi8, the 16-bit positions are
 574                          * multiplied by 2 in the eop_shuffle value.]
 575                          */
 576                         __m128i eop_shuffle =
 577                                 _mm_set_epi8(/* zero hi 64b */
 578                                              0xFF, 0xFF, 0xFF, 0xFF,
 579                                              0xFF, 0xFF, 0xFF, 0xFF,
 580                                              /* move values to lo 64b */
 581                                              8, 0, 10, 2,
 582                                              12, 4, 14, 6);
 583                         split_bits = _mm_shuffle_epi8(split_bits, eop_shuffle);
 584                         *(uint64_t *)split_packet =
 585                                 _mm_cvtsi128_si64(split_bits);
 586                         split_packet += IAVF_DESCS_PER_LOOP_AVX;
 587                 }
 588
 589                 /* perform dd_check */
 590                 status0_7 = _mm256_and_si256(status0_7, dd_check);
 591                 status0_7 = _mm256_packs_epi32(status0_7,
 592                                                _mm256_setzero_si256());
 593
 594                 uint64_t burst = __builtin_popcountll
 595                                         (_mm_cvtsi128_si64
 596                                                 (_mm256_extracti128_si256
 597                                                         (status0_7, 1)));
 598                 burst += __builtin_popcountll
 599                                 (_mm_cvtsi128_si64
 600                                         (_mm256_castsi256_si128(status0_7)));
 601                 received += burst;
 602                 if (burst != IAVF_DESCS_PER_LOOP_AVX)
 603                         break;
 604         }
 605
 606         /* update tail pointers */
 607         rxq->rx_tail += received;
 608         rxq->rx_tail &= (rxq->nb_rx_desc - 1);
 609         if ((rxq->rx_tail & 1) == 1 && received > 1) { /* keep avx2 aligned */
 610                 rxq->rx_tail--;
 611                 received--;
 612         }
 613         rxq->rxrearm_nb += received;
 614         return received;
 615 }
 616
 617 /**
 618  * Notice:
 619  * - nb_pkts < IAVF_DESCS_PER_LOOP, just return no packet
 620  */
 621 uint16_t
 622 iavf_recv_pkts_vec_avx2(void *rx_queue, struct rte_mbuf **rx_pkts,
 623                         uint16_t nb_pkts)
 624 {
 625         return _iavf_recv_raw_pkts_vec_avx2(rx_queue, rx_pkts, nb_pkts, NULL);
 626 }
 627
 628 /**
 629  * vPMD receive routine that reassembles single burst of 32 scattered packets
 630  * Notice:
 631  * - nb_pkts < IAVF_DESCS_PER_LOOP, just return no packet
 632  */
 633 static uint16_t
 634 iavf_recv_scattered_burst_vec_avx2(void *rx_queue, struct rte_mbuf **rx_pkts,
 635                                    uint16_t nb_pkts)
 636 {
 637         struct iavf_rx_queue *rxq = rx_queue;
 638         uint8_t split_flags[IAVF_VPMD_RX_MAX_BURST] = {0};
 639
 640         /* get some new buffers */
 641         uint16_t nb_bufs = _iavf_recv_raw_pkts_vec_avx2(rxq, rx_pkts, nb_pkts,
 642                                                        split_flags);
 643         if (nb_bufs == 0)
 644                 return 0;
 645
 646         /* happy day case, full burst + no packets to be joined */
 647         const uint64_t *split_fl64 = (uint64_t *)split_flags;
 648
 649         if (!rxq->pkt_first_seg &&
 650             split_fl64[0] == 0 && split_fl64[1] == 0 &&
 651             split_fl64[2] == 0 && split_fl64[3] == 0)
 652                 return nb_bufs;
 653
 654         /* reassemble any packets that need reassembly*/
 655         unsigned int i = 0;
 656
 657         if (!rxq->pkt_first_seg) {
 658                 /* find the first split flag, and only reassemble then*/
 659                 while (i < nb_bufs && !split_flags[i])
 660                         i++;
 661                 if (i == nb_bufs)
 662                         return nb_bufs;
 663                 rxq->pkt_first_seg = rx_pkts[i];
 664         }
 665         return i + reassemble_packets(rxq, &rx_pkts[i], nb_bufs - i,
 666                                              &split_flags[i]);
 667 }
 668
 669 /**
 670  * vPMD receive routine that reassembles scattered packets.
 671  * Main receive routine that can handle arbitrary burst sizes
 672  * Notice:
 673  * - nb_pkts < IAVF_DESCS_PER_LOOP, just return no packet
 674  */
 675 uint16_t
 676 iavf_recv_scattered_pkts_vec_avx2(void *rx_queue, struct rte_mbuf **rx_pkts,
 677                                   uint16_t nb_pkts)
 678 {
 679         uint16_t retval = 0;
 680
 681         while (nb_pkts > IAVF_VPMD_RX_MAX_BURST) {
 682                 uint16_t burst = iavf_recv_scattered_burst_vec_avx2(rx_queue,
 683                                 rx_pkts + retval, IAVF_VPMD_RX_MAX_BURST);
 684                 retval += burst;
 685                 nb_pkts -= burst;
 686                 if (burst < IAVF_VPMD_RX_MAX_BURST)
 687                         return retval;
 688         }
 689         return retval + iavf_recv_scattered_burst_vec_avx2(rx_queue,
 690                                 rx_pkts + retval, nb_pkts);
 691 }
 692
 693 static inline void
 694 iavf_vtx1(volatile struct iavf_tx_desc *txdp,
 695           struct rte_mbuf *pkt, uint64_t flags)
 696 {
 697         uint64_t high_qw =
 698                 (IAVF_TX_DESC_DTYPE_DATA |
 699                  ((uint64_t)flags  << IAVF_TXD_QW1_CMD_SHIFT) |
 700                  ((uint64_t)pkt->data_len << IAVF_TXD_QW1_TX_BUF_SZ_SHIFT));
 701
 702         __m128i descriptor = _mm_set_epi64x(high_qw,
 703                                 pkt->buf_physaddr + pkt->data_off);
 704         _mm_store_si128((__m128i *)txdp, descriptor);
 705 }
 706
 707 static inline void
 708 iavf_vtx(volatile struct iavf_tx_desc *txdp,
 709          struct rte_mbuf **pkt, uint16_t nb_pkts,  uint64_t flags)
 710 {
 711         const uint64_t hi_qw_tmpl = (IAVF_TX_DESC_DTYPE_DATA |
 712                         ((uint64_t)flags  << IAVF_TXD_QW1_CMD_SHIFT));
 713
 714         /* if unaligned on 32-bit boundary, do one to align */
 715         if (((uintptr_t)txdp & 0x1F) != 0 && nb_pkts != 0) {
 716                 iavf_vtx1(txdp, *pkt, flags);
 717                 nb_pkts--, txdp++, pkt++;
 718         }
 719
 720         /* do two at a time while possible, in bursts */
 721         for (; nb_pkts > 3; txdp += 4, pkt += 4, nb_pkts -= 4) {
 722                 uint64_t hi_qw3 =
 723                         hi_qw_tmpl |
 724                         ((uint64_t)pkt[3]->data_len <<
 725                          IAVF_TXD_QW1_TX_BUF_SZ_SHIFT);
 726                 uint64_t hi_qw2 =
 727                         hi_qw_tmpl |
 728                         ((uint64_t)pkt[2]->data_len <<
 729                          IAVF_TXD_QW1_TX_BUF_SZ_SHIFT);
 730                 uint64_t hi_qw1 =
 731                         hi_qw_tmpl |
 732                         ((uint64_t)pkt[1]->data_len <<
 733                          IAVF_TXD_QW1_TX_BUF_SZ_SHIFT);
 734                 uint64_t hi_qw0 =
 735                         hi_qw_tmpl |
 736                         ((uint64_t)pkt[0]->data_len <<
 737                          IAVF_TXD_QW1_TX_BUF_SZ_SHIFT);
 738
 739                 __m256i desc2_3 =
 740                         _mm256_set_epi64x
 741                                 (hi_qw3,
 742                                  pkt[3]->buf_physaddr + pkt[3]->data_off,
 743                                  hi_qw2,
 744                                  pkt[2]->buf_physaddr + pkt[2]->data_off);
 745                 __m256i desc0_1 =
 746                         _mm256_set_epi64x
 747                                 (hi_qw1,
 748                                  pkt[1]->buf_physaddr + pkt[1]->data_off,
 749                                  hi_qw0,
 750                                  pkt[0]->buf_physaddr + pkt[0]->data_off);
 751                 _mm256_store_si256((void *)(txdp + 2), desc2_3);
 752                 _mm256_store_si256((void *)txdp, desc0_1);
 753         }
 754
 755         /* do any last ones */
 756         while (nb_pkts) {
 757                 iavf_vtx1(txdp, *pkt, flags);
 758                 txdp++, pkt++, nb_pkts--;
 759         }
 760 }
 761
 762 static inline uint16_t
 763 iavf_xmit_fixed_burst_vec_avx2(void *tx_queue, struct rte_mbuf **tx_pkts,
 764                                uint16_t nb_pkts)
 765 {
 766         struct iavf_tx_queue *txq = (struct iavf_tx_queue *)tx_queue;
 767         volatile struct iavf_tx_desc *txdp;
 768         struct iavf_tx_entry *txep;
 769         uint16_t n, nb_commit, tx_id;
 770         /* bit2 is reserved and must be set to 1 according to Spec */
 771         uint64_t flags = IAVF_TX_DESC_CMD_EOP | IAVF_TX_DESC_CMD_ICRC;
 772         uint64_t rs = IAVF_TX_DESC_CMD_RS | flags;
 773
 774         /* cross rx_thresh boundary is not allowed */
 775         nb_pkts = RTE_MIN(nb_pkts, txq->rs_thresh);
 776
 777         if (txq->nb_free < txq->free_thresh)
 778                 iavf_tx_free_bufs(txq);
 779
 780         nb_commit = nb_pkts = (uint16_t)RTE_MIN(txq->nb_free, nb_pkts);
 781         if (unlikely(nb_pkts == 0))
 782                 return 0;
 783
 784         tx_id = txq->tx_tail;
 785         txdp = &txq->tx_ring[tx_id];
 786         txep = &txq->sw_ring[tx_id];
 787
 788         txq->nb_free = (uint16_t)(txq->nb_free - nb_pkts);
 789
 790         n = (uint16_t)(txq->nb_tx_desc - tx_id);
 791         if (nb_commit >= n) {
 792                 tx_backlog_entry(txep, tx_pkts, n);
 793
 794                 iavf_vtx(txdp, tx_pkts, n - 1, flags);
 795                 tx_pkts += (n - 1);
 796                 txdp += (n - 1);
 797
 798                 iavf_vtx1(txdp, *tx_pkts++, rs);
 799
 800                 nb_commit = (uint16_t)(nb_commit - n);
 801
 802                 tx_id = 0;
 803                 txq->next_rs = (uint16_t)(txq->rs_thresh - 1);
 804
 805                 /* avoid reach the end of ring */
 806                 txdp = &txq->tx_ring[tx_id];
 807                 txep = &txq->sw_ring[tx_id];
 808         }
 809
 810         tx_backlog_entry(txep, tx_pkts, nb_commit);
 811
 812         iavf_vtx(txdp, tx_pkts, nb_commit, flags);
 813
 814         tx_id = (uint16_t)(tx_id + nb_commit);
 815         if (tx_id > txq->next_rs) {
 816                 txq->tx_ring[txq->next_rs].cmd_type_offset_bsz |=
 817                         rte_cpu_to_le_64(((uint64_t)IAVF_TX_DESC_CMD_RS) <<
 818                                          IAVF_TXD_QW1_CMD_SHIFT);
 819                 txq->next_rs =
 820                         (uint16_t)(txq->next_rs + txq->rs_thresh);
 821         }
 822
 823         txq->tx_tail = tx_id;
 824
 825         IAVF_PCI_REG_WRITE(txq->qtx_tail, txq->tx_tail);
 826
 827         return nb_pkts;
 828 }
 829
 830 uint16_t
 831 iavf_xmit_pkts_vec_avx2(void *tx_queue, struct rte_mbuf **tx_pkts,
 832                         uint16_t nb_pkts)
 833 {
 834         uint16_t nb_tx = 0;
 835         struct iavf_tx_queue *txq = (struct iavf_tx_queue *)tx_queue;
 836
 837         while (nb_pkts) {
 838                 uint16_t ret, num;
 839
 840                 num = (uint16_t)RTE_MIN(nb_pkts, txq->rs_thresh);
 841                 ret = iavf_xmit_fixed_burst_vec_avx2(tx_queue, &tx_pkts[nb_tx],
 842                                                      num);
 843                 nb_tx += ret;
 844                 nb_pkts -= ret;
 845                 if (ret < num)
 846                         break;
 847         }
 848
 849         return nb_tx;
 850 }