drivers/net/mlx5/mlx5_rxtx_vec_sse.h

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright 2017 6WIND S.A.
   3  * Copyright 2017 Mellanox Technologies, Ltd
   4  */
   5
   6 #ifndef RTE_PMD_MLX5_RXTX_VEC_SSE_H_
   7 #define RTE_PMD_MLX5_RXTX_VEC_SSE_H_
   8
   9 #include <stdint.h>
  10 #include <string.h>
  11 #include <stdlib.h>
  12 #include <smmintrin.h>
  13
  14 #include <rte_mbuf.h>
  15 #include <rte_mempool.h>
  16 #include <rte_prefetch.h>
  17
  18 #include <mlx5_prm.h>
  19
  20 #include "mlx5_defs.h"
  21 #include "mlx5.h"
  22 #include "mlx5_utils.h"
  23 #include "mlx5_rxtx.h"
  24 #include "mlx5_rxtx_vec.h"
  25 #include "mlx5_autoconf.h"
  26
  27 #ifndef __INTEL_COMPILER
  28 #pragma GCC diagnostic ignored "-Wcast-qual"
  29 #endif
  30
  31 /**
  32  * Store free buffers to RX SW ring.
  33  *
  34  * @param rxq
  35  *   Pointer to RX queue structure.
  36  * @param pkts
  37  *   Pointer to array of packets to be stored.
  38  * @param pkts_n
  39  *   Number of packets to be stored.
  40  */
  41 static inline void
  42 rxq_copy_mbuf_v(struct mlx5_rxq_data *rxq, struct rte_mbuf **pkts, uint16_t n)
  43 {
  44         const uint16_t q_mask = (1 << rxq->elts_n) - 1;
  45         struct rte_mbuf **elts = &(*rxq->elts)[rxq->rq_pi & q_mask];
  46         unsigned int pos;
  47         uint16_t p = n & -2;
  48
  49         for (pos = 0; pos < p; pos += 2) {
  50                 __m128i mbp;
  51
  52                 mbp = _mm_loadu_si128((__m128i *)&elts[pos]);
  53                 _mm_storeu_si128((__m128i *)&pkts[pos], mbp);
  54         }
  55         if (n & 1)
  56                 pkts[pos] = elts[pos];
  57 }
  58
  59 /**
  60  * Decompress a compressed completion and fill in mbufs in RX SW ring with data
  61  * extracted from the title completion descriptor.
  62  *
  63  * @param rxq
  64  *   Pointer to RX queue structure.
  65  * @param cq
  66  *   Pointer to completion array having a compressed completion at first.
  67  * @param elts
  68  *   Pointer to SW ring to be filled. The first mbuf has to be pre-built from
  69  *   the title completion descriptor to be copied to the rest of mbufs.
  70  *
  71  * @return
  72  *   Number of mini-CQEs successfully decompressed.
  73  */
  74 static inline uint16_t
  75 rxq_cq_decompress_v(struct mlx5_rxq_data *rxq, volatile struct mlx5_cqe *cq,
  76                     struct rte_mbuf **elts)
  77 {
  78         volatile struct mlx5_mini_cqe8 *mcq = (void *)(cq + 1);
  79         struct rte_mbuf *t_pkt = elts[0]; /* Title packet is pre-built. */
  80         unsigned int pos;
  81         unsigned int i;
  82         unsigned int inv = 0;
  83         /* Mask to shuffle from extracted mini CQE to mbuf. */
  84         const __m128i shuf_mask1 =
  85                 _mm_set_epi8(0,  1,  2,  3, /* rss, bswap32 */
  86                             -1, -1,         /* skip vlan_tci */
  87                              6,  7,         /* data_len, bswap16 */
  88                             -1, -1,  6,  7, /* pkt_len, bswap16 */
  89                             -1, -1, -1, -1  /* skip packet_type */);
  90         const __m128i shuf_mask2 =
  91                 _mm_set_epi8(8,  9, 10, 11, /* rss, bswap32 */
  92                             -1, -1,         /* skip vlan_tci */
  93                             14, 15,         /* data_len, bswap16 */
  94                             -1, -1, 14, 15, /* pkt_len, bswap16 */
  95                             -1, -1, -1, -1  /* skip packet_type */);
  96         /* Restore the compressed count. Must be 16 bits. */
  97         const uint16_t mcqe_n = t_pkt->data_len +
  98                                 (rxq->crc_present * RTE_ETHER_CRC_LEN);
  99         const __m128i rearm =
 100                 _mm_loadu_si128((__m128i *)&t_pkt->rearm_data);
 101         const __m128i rxdf =
 102                 _mm_loadu_si128((__m128i *)&t_pkt->rx_descriptor_fields1);
 103         const __m128i crc_adj =
 104                 _mm_set_epi16(0, 0, 0,
 105                               rxq->crc_present * RTE_ETHER_CRC_LEN,
 106                               0,
 107                               rxq->crc_present * RTE_ETHER_CRC_LEN,
 108                               0, 0);
 109         const uint32_t flow_tag = t_pkt->hash.fdir.hi;
 110 #ifdef MLX5_PMD_SOFT_COUNTERS
 111         const __m128i zero = _mm_setzero_si128();
 112         const __m128i ones = _mm_cmpeq_epi32(zero, zero);
 113         uint32_t rcvd_byte = 0;
 114         /* Mask to shuffle byte_cnt to add up stats. Do bswap16 for all. */
 115         const __m128i len_shuf_mask =
 116                 _mm_set_epi8(-1, -1, -1, -1,
 117                              -1, -1, -1, -1,
 118                              14, 15,  6,  7,
 119                              10, 11,  2,  3);
 120 #endif
 121         /*
 122          * A. load mCQEs into a 128bit register.
 123          * B. store rearm data to mbuf.
 124          * C. combine data from mCQEs with rx_descriptor_fields1.
 125          * D. store rx_descriptor_fields1.
 126          * E. store flow tag (rte_flow mark).
 127          */
 128         for (pos = 0; pos < mcqe_n; ) {
 129                 __m128i mcqe1, mcqe2;
 130                 __m128i rxdf1, rxdf2;
 131 #ifdef MLX5_PMD_SOFT_COUNTERS
 132                 __m128i byte_cnt, invalid_mask;
 133 #endif
 134
 135                 for (i = 0; i < MLX5_VPMD_DESCS_PER_LOOP; ++i)
 136                         if (likely(pos + i < mcqe_n))
 137                                 rte_prefetch0((void *)(cq + pos + i));
 138                 /* A.1 load mCQEs into a 128bit register. */
 139                 mcqe1 = _mm_loadu_si128((__m128i *)&mcq[pos % 8]);
 140                 mcqe2 = _mm_loadu_si128((__m128i *)&mcq[pos % 8 + 2]);
 141                 /* B.1 store rearm data to mbuf. */
 142                 _mm_storeu_si128((__m128i *)&elts[pos]->rearm_data, rearm);
 143                 _mm_storeu_si128((__m128i *)&elts[pos + 1]->rearm_data, rearm);
 144                 /* C.1 combine data from mCQEs with rx_descriptor_fields1. */
 145                 rxdf1 = _mm_shuffle_epi8(mcqe1, shuf_mask1);
 146                 rxdf2 = _mm_shuffle_epi8(mcqe1, shuf_mask2);
 147                 rxdf1 = _mm_sub_epi16(rxdf1, crc_adj);
 148                 rxdf2 = _mm_sub_epi16(rxdf2, crc_adj);
 149                 rxdf1 = _mm_blend_epi16(rxdf1, rxdf, 0x23);
 150                 rxdf2 = _mm_blend_epi16(rxdf2, rxdf, 0x23);
 151                 /* D.1 store rx_descriptor_fields1. */
 152                 _mm_storeu_si128((__m128i *)
 153                                   &elts[pos]->rx_descriptor_fields1,
 154                                  rxdf1);
 155                 _mm_storeu_si128((__m128i *)
 156                                   &elts[pos + 1]->rx_descriptor_fields1,
 157                                  rxdf2);
 158                 /* B.1 store rearm data to mbuf. */
 159                 _mm_storeu_si128((__m128i *)&elts[pos + 2]->rearm_data, rearm);
 160                 _mm_storeu_si128((__m128i *)&elts[pos + 3]->rearm_data, rearm);
 161                 /* C.1 combine data from mCQEs with rx_descriptor_fields1. */
 162                 rxdf1 = _mm_shuffle_epi8(mcqe2, shuf_mask1);
 163                 rxdf2 = _mm_shuffle_epi8(mcqe2, shuf_mask2);
 164                 rxdf1 = _mm_sub_epi16(rxdf1, crc_adj);
 165                 rxdf2 = _mm_sub_epi16(rxdf2, crc_adj);
 166                 rxdf1 = _mm_blend_epi16(rxdf1, rxdf, 0x23);
 167                 rxdf2 = _mm_blend_epi16(rxdf2, rxdf, 0x23);
 168                 /* D.1 store rx_descriptor_fields1. */
 169                 _mm_storeu_si128((__m128i *)
 170                                   &elts[pos + 2]->rx_descriptor_fields1,
 171                                  rxdf1);
 172                 _mm_storeu_si128((__m128i *)
 173                                   &elts[pos + 3]->rx_descriptor_fields1,
 174                                  rxdf2);
 175 #ifdef MLX5_PMD_SOFT_COUNTERS
 176                 invalid_mask = _mm_set_epi64x(0,
 177                                               (mcqe_n - pos) *
 178                                               sizeof(uint16_t) * 8);
 179                 invalid_mask = _mm_sll_epi64(ones, invalid_mask);
 180                 mcqe1 = _mm_srli_si128(mcqe1, 4);
 181                 byte_cnt = _mm_blend_epi16(mcqe1, mcqe2, 0xcc);
 182                 byte_cnt = _mm_shuffle_epi8(byte_cnt, len_shuf_mask);
 183                 byte_cnt = _mm_andnot_si128(invalid_mask, byte_cnt);
 184                 byte_cnt = _mm_hadd_epi16(byte_cnt, zero);
 185                 rcvd_byte += _mm_cvtsi128_si64(_mm_hadd_epi16(byte_cnt, zero));
 186 #endif
 187                 if (rxq->mark) {
 188                         /* E.1 store flow tag (rte_flow mark). */
 189                         elts[pos]->hash.fdir.hi = flow_tag;
 190                         elts[pos + 1]->hash.fdir.hi = flow_tag;
 191                         elts[pos + 2]->hash.fdir.hi = flow_tag;
 192                         elts[pos + 3]->hash.fdir.hi = flow_tag;
 193                 }
 194                 if (rxq->dynf_meta) {
 195                         int32_t offs = rxq->flow_meta_offset;
 196                         const uint32_t meta =
 197                                 *RTE_MBUF_DYNFIELD(t_pkt, offs, uint32_t *);
 198
 199                         /* Check if title packet has valid metadata. */
 200                         if (meta) {
 201                                 MLX5_ASSERT(t_pkt->ol_flags &
 202                                             rxq->flow_meta_mask);
 203                                 *RTE_MBUF_DYNFIELD(elts[pos], offs,
 204                                                         uint32_t *) = meta;
 205                                 *RTE_MBUF_DYNFIELD(elts[pos + 1], offs,
 206                                                         uint32_t *) = meta;
 207                                 *RTE_MBUF_DYNFIELD(elts[pos + 2], offs,
 208                                                         uint32_t *) = meta;
 209                                 *RTE_MBUF_DYNFIELD(elts[pos + 3], offs,
 210                                                         uint32_t *) = meta;
 211                         }
 212                 }
 213                 pos += MLX5_VPMD_DESCS_PER_LOOP;
 214                 /* Move to next CQE and invalidate consumed CQEs. */
 215                 if (!(pos & 0x7) && pos < mcqe_n) {
 216                         if (pos + 8 < mcqe_n)
 217                                 rte_prefetch0((void *)(cq + pos + 8));
 218                         mcq = (void *)(cq + pos);
 219                         for (i = 0; i < 8; ++i)
 220                                 cq[inv++].op_own = MLX5_CQE_INVALIDATE;
 221                 }
 222         }
 223         /* Invalidate the rest of CQEs. */
 224         for (; inv < mcqe_n; ++inv)
 225                 cq[inv].op_own = MLX5_CQE_INVALIDATE;
 226 #ifdef MLX5_PMD_SOFT_COUNTERS
 227         rxq->stats.ipackets += mcqe_n;
 228         rxq->stats.ibytes += rcvd_byte;
 229 #endif
 230         rxq->cq_ci += mcqe_n;
 231         return mcqe_n;
 232 }
 233
 234 /**
 235  * Calculate packet type and offload flag for mbuf and store it.
 236  *
 237  * @param rxq
 238  *   Pointer to RX queue structure.
 239  * @param cqes[4]
 240  *   Array of four 16bytes completions extracted from the original completion
 241  *   descriptor.
 242  * @param op_err
 243  *   Opcode vector having responder error status. Each field is 4B.
 244  * @param pkts
 245  *   Pointer to array of packets to be filled.
 246  */
 247 static inline void
 248 rxq_cq_to_ptype_oflags_v(struct mlx5_rxq_data *rxq, __m128i cqes[4],
 249                          __m128i op_err, struct rte_mbuf **pkts)
 250 {
 251         __m128i pinfo0, pinfo1;
 252         __m128i pinfo, ptype;
 253         __m128i ol_flags = _mm_set1_epi32(rxq->rss_hash * PKT_RX_RSS_HASH |
 254                                           rxq->hw_timestamp * PKT_RX_TIMESTAMP);
 255         __m128i cv_flags;
 256         const __m128i zero = _mm_setzero_si128();
 257         const __m128i ptype_mask =
 258                 _mm_set_epi32(0xfd06, 0xfd06, 0xfd06, 0xfd06);
 259         const __m128i ptype_ol_mask =
 260                 _mm_set_epi32(0x106, 0x106, 0x106, 0x106);
 261         const __m128i pinfo_mask =
 262                 _mm_set_epi32(0x3, 0x3, 0x3, 0x3);
 263         const __m128i cv_flag_sel =
 264                 _mm_set_epi8(0, 0, 0, 0, 0, 0, 0, 0, 0,
 265                              (uint8_t)((PKT_RX_IP_CKSUM_GOOD |
 266                                         PKT_RX_L4_CKSUM_GOOD) >> 1),
 267                              0,
 268                              (uint8_t)(PKT_RX_L4_CKSUM_GOOD >> 1),
 269                              0,
 270                              (uint8_t)(PKT_RX_IP_CKSUM_GOOD >> 1),
 271                              (uint8_t)(PKT_RX_VLAN | PKT_RX_VLAN_STRIPPED),
 272                              0);
 273         const __m128i cv_mask =
 274                 _mm_set_epi32(PKT_RX_IP_CKSUM_GOOD | PKT_RX_L4_CKSUM_GOOD |
 275                               PKT_RX_VLAN | PKT_RX_VLAN_STRIPPED,
 276                               PKT_RX_IP_CKSUM_GOOD | PKT_RX_L4_CKSUM_GOOD |
 277                               PKT_RX_VLAN | PKT_RX_VLAN_STRIPPED,
 278                               PKT_RX_IP_CKSUM_GOOD | PKT_RX_L4_CKSUM_GOOD |
 279                               PKT_RX_VLAN | PKT_RX_VLAN_STRIPPED,
 280                               PKT_RX_IP_CKSUM_GOOD | PKT_RX_L4_CKSUM_GOOD |
 281                               PKT_RX_VLAN | PKT_RX_VLAN_STRIPPED);
 282         const __m128i mbuf_init =
 283                 _mm_load_si128((__m128i *)&rxq->mbuf_initializer);
 284         __m128i rearm0, rearm1, rearm2, rearm3;
 285         uint8_t pt_idx0, pt_idx1, pt_idx2, pt_idx3;
 286
 287         /* Extract pkt_info field. */
 288         pinfo0 = _mm_unpacklo_epi32(cqes[0], cqes[1]);
 289         pinfo1 = _mm_unpacklo_epi32(cqes[2], cqes[3]);
 290         pinfo = _mm_unpacklo_epi64(pinfo0, pinfo1);
 291         /* Extract hdr_type_etc field. */
 292         pinfo0 = _mm_unpackhi_epi32(cqes[0], cqes[1]);
 293         pinfo1 = _mm_unpackhi_epi32(cqes[2], cqes[3]);
 294         ptype = _mm_unpacklo_epi64(pinfo0, pinfo1);
 295         if (rxq->mark) {
 296                 const __m128i pinfo_ft_mask =
 297                         _mm_set_epi32(0xffffff00, 0xffffff00,
 298                                       0xffffff00, 0xffffff00);
 299                 const __m128i fdir_flags = _mm_set1_epi32(PKT_RX_FDIR);
 300                 __m128i fdir_id_flags = _mm_set1_epi32(PKT_RX_FDIR_ID);
 301                 __m128i flow_tag, invalid_mask;
 302
 303                 flow_tag = _mm_and_si128(pinfo, pinfo_ft_mask);
 304                 /* Check if flow tag is non-zero then set PKT_RX_FDIR. */
 305                 invalid_mask = _mm_cmpeq_epi32(flow_tag, zero);
 306                 ol_flags = _mm_or_si128(ol_flags,
 307                                         _mm_andnot_si128(invalid_mask,
 308                                                          fdir_flags));
 309                 /* Mask out invalid entries. */
 310                 fdir_id_flags = _mm_andnot_si128(invalid_mask, fdir_id_flags);
 311                 /* Check if flow tag MLX5_FLOW_MARK_DEFAULT. */
 312                 ol_flags = _mm_or_si128(ol_flags,
 313                                         _mm_andnot_si128(
 314                                                 _mm_cmpeq_epi32(flow_tag,
 315                                                                 pinfo_ft_mask),
 316                                                 fdir_id_flags));
 317         }
 318         /*
 319          * Merge the two fields to generate the following:
 320          * bit[1]     = l3_ok
 321          * bit[2]     = l4_ok
 322          * bit[8]     = cv
 323          * bit[11:10] = l3_hdr_type
 324          * bit[14:12] = l4_hdr_type
 325          * bit[15]    = ip_frag
 326          * bit[16]    = tunneled
 327          * bit[17]    = outer_l3_type
 328          */
 329         ptype = _mm_and_si128(ptype, ptype_mask);
 330         pinfo = _mm_and_si128(pinfo, pinfo_mask);
 331         pinfo = _mm_slli_epi32(pinfo, 16);
 332         /* Make pinfo has merged fields for ol_flags calculation. */
 333         pinfo = _mm_or_si128(ptype, pinfo);
 334         ptype = _mm_srli_epi32(pinfo, 10);
 335         ptype = _mm_packs_epi32(ptype, zero);
 336         /* Errored packets will have RTE_PTYPE_ALL_MASK. */
 337         op_err = _mm_srli_epi16(op_err, 8);
 338         ptype = _mm_or_si128(ptype, op_err);
 339         pt_idx0 = _mm_extract_epi8(ptype, 0);
 340         pt_idx1 = _mm_extract_epi8(ptype, 2);
 341         pt_idx2 = _mm_extract_epi8(ptype, 4);
 342         pt_idx3 = _mm_extract_epi8(ptype, 6);
 343         pkts[0]->packet_type = mlx5_ptype_table[pt_idx0] |
 344                                !!(pt_idx0 & (1 << 6)) * rxq->tunnel;
 345         pkts[1]->packet_type = mlx5_ptype_table[pt_idx1] |
 346                                !!(pt_idx1 & (1 << 6)) * rxq->tunnel;
 347         pkts[2]->packet_type = mlx5_ptype_table[pt_idx2] |
 348                                !!(pt_idx2 & (1 << 6)) * rxq->tunnel;
 349         pkts[3]->packet_type = mlx5_ptype_table[pt_idx3] |
 350                                !!(pt_idx3 & (1 << 6)) * rxq->tunnel;
 351         /* Fill flags for checksum and VLAN. */
 352         pinfo = _mm_and_si128(pinfo, ptype_ol_mask);
 353         pinfo = _mm_shuffle_epi8(cv_flag_sel, pinfo);
 354         /* Locate checksum flags at byte[2:1] and merge with VLAN flags. */
 355         cv_flags = _mm_slli_epi32(pinfo, 9);
 356         cv_flags = _mm_or_si128(pinfo, cv_flags);
 357         /* Move back flags to start from byte[0]. */
 358         cv_flags = _mm_srli_epi32(cv_flags, 8);
 359         /* Mask out garbage bits. */
 360         cv_flags = _mm_and_si128(cv_flags, cv_mask);
 361         /* Merge to ol_flags. */
 362         ol_flags = _mm_or_si128(ol_flags, cv_flags);
 363         /* Merge mbuf_init and ol_flags. */
 364         rearm0 = _mm_blend_epi16(mbuf_init, _mm_slli_si128(ol_flags, 8), 0x30);
 365         rearm1 = _mm_blend_epi16(mbuf_init, _mm_slli_si128(ol_flags, 4), 0x30);
 366         rearm2 = _mm_blend_epi16(mbuf_init, ol_flags, 0x30);
 367         rearm3 = _mm_blend_epi16(mbuf_init, _mm_srli_si128(ol_flags, 4), 0x30);
 368         /* Write 8B rearm_data and 8B ol_flags. */
 369         _mm_store_si128((__m128i *)&pkts[0]->rearm_data, rearm0);
 370         _mm_store_si128((__m128i *)&pkts[1]->rearm_data, rearm1);
 371         _mm_store_si128((__m128i *)&pkts[2]->rearm_data, rearm2);
 372         _mm_store_si128((__m128i *)&pkts[3]->rearm_data, rearm3);
 373 }
 374
 375 /**
 376  * Receive burst of packets. An errored completion also consumes a mbuf, but the
 377  * packet_type is set to be RTE_PTYPE_ALL_MASK. Marked mbufs should be freed
 378  * before returning to application.
 379  *
 380  * @param rxq
 381  *   Pointer to RX queue structure.
 382  * @param[out] pkts
 383  *   Array to store received packets.
 384  * @param pkts_n
 385  *   Maximum number of packets in array.
 386  * @param[out] err
 387  *   Pointer to a flag. Set non-zero value if pkts array has at least one error
 388  *   packet to handle.
 389  * @param[out] no_cq
 390  *   Pointer to a boolean. Set true if no new CQE seen.
 391  *
 392  * @return
 393  *   Number of packets received including errors (<= pkts_n).
 394  */
 395 static inline uint16_t
 396 rxq_burst_v(struct mlx5_rxq_data *rxq, struct rte_mbuf **pkts, uint16_t pkts_n,
 397             uint64_t *err, bool *no_cq)
 398 {
 399         const uint16_t q_n = 1 << rxq->cqe_n;
 400         const uint16_t q_mask = q_n - 1;
 401         volatile struct mlx5_cqe *cq;
 402         struct rte_mbuf **elts;
 403         unsigned int pos;
 404         uint64_t n;
 405         uint16_t repl_n;
 406         uint64_t comp_idx = MLX5_VPMD_DESCS_PER_LOOP;
 407         uint16_t nocmp_n = 0;
 408         uint16_t rcvd_pkt = 0;
 409         unsigned int cq_idx = rxq->cq_ci & q_mask;
 410         unsigned int elts_idx;
 411         unsigned int ownership = !!(rxq->cq_ci & (q_mask + 1));
 412         const __m128i owner_check =
 413                 _mm_set_epi64x(0x0100000001000000LL, 0x0100000001000000LL);
 414         const __m128i opcode_check =
 415                 _mm_set_epi64x(0xf0000000f0000000LL, 0xf0000000f0000000LL);
 416         const __m128i format_check =
 417                 _mm_set_epi64x(0x0c0000000c000000LL, 0x0c0000000c000000LL);
 418         const __m128i resp_err_check =
 419                 _mm_set_epi64x(0xe0000000e0000000LL, 0xe0000000e0000000LL);
 420 #ifdef MLX5_PMD_SOFT_COUNTERS
 421         uint32_t rcvd_byte = 0;
 422         /* Mask to shuffle byte_cnt to add up stats. Do bswap16 for all. */
 423         const __m128i len_shuf_mask =
 424                 _mm_set_epi8(-1, -1, -1, -1,
 425                              -1, -1, -1, -1,
 426                              12, 13,  8,  9,
 427                               4,  5,  0,  1);
 428 #endif
 429         /* Mask to shuffle from extracted CQE to mbuf. */
 430         const __m128i shuf_mask =
 431                 _mm_set_epi8(-1,  3,  2,  1, /* fdir.hi */
 432                              12, 13, 14, 15, /* rss, bswap32 */
 433                              10, 11,         /* vlan_tci, bswap16 */
 434                               4,  5,         /* data_len, bswap16 */
 435                              -1, -1,         /* zero out 2nd half of pkt_len */
 436                               4,  5          /* pkt_len, bswap16 */);
 437         /* Mask to blend from the last Qword to the first DQword. */
 438         const __m128i blend_mask =
 439                 _mm_set_epi8(-1, -1, -1, -1,
 440                              -1, -1, -1, -1,
 441                               0,  0,  0,  0,
 442                               0,  0,  0, -1);
 443         const __m128i zero = _mm_setzero_si128();
 444         const __m128i ones = _mm_cmpeq_epi32(zero, zero);
 445         const __m128i crc_adj =
 446                 _mm_set_epi16(0, 0, 0, 0, 0,
 447                               rxq->crc_present * RTE_ETHER_CRC_LEN,
 448                               0,
 449                               rxq->crc_present * RTE_ETHER_CRC_LEN);
 450         const __m128i flow_mark_adj = _mm_set_epi32(rxq->mark * (-1), 0, 0, 0);
 451
 452         MLX5_ASSERT(rxq->sges_n == 0);
 453         MLX5_ASSERT(rxq->cqe_n == rxq->elts_n);
 454         cq = &(*rxq->cqes)[cq_idx];
 455         rte_prefetch0(cq);
 456         rte_prefetch0(cq + 1);
 457         rte_prefetch0(cq + 2);
 458         rte_prefetch0(cq + 3);
 459         pkts_n = RTE_MIN(pkts_n, MLX5_VPMD_RX_MAX_BURST);
 460         repl_n = q_n - (rxq->rq_ci - rxq->rq_pi);
 461         if (repl_n >= rxq->rq_repl_thresh)
 462                 mlx5_rx_replenish_bulk_mbuf(rxq, repl_n);
 463         /* See if there're unreturned mbufs from compressed CQE. */
 464         rcvd_pkt = rxq->decompressed;
 465         if (rcvd_pkt > 0) {
 466                 rcvd_pkt = RTE_MIN(rcvd_pkt, pkts_n);
 467                 rxq_copy_mbuf_v(rxq, pkts, rcvd_pkt);
 468                 rxq->rq_pi += rcvd_pkt;
 469                 rxq->decompressed -= rcvd_pkt;
 470                 pkts += rcvd_pkt;
 471         }
 472         elts_idx = rxq->rq_pi & q_mask;
 473         elts = &(*rxq->elts)[elts_idx];
 474         /* Not to overflow pkts array. */
 475         pkts_n = RTE_ALIGN_FLOOR(pkts_n - rcvd_pkt, MLX5_VPMD_DESCS_PER_LOOP);
 476         /* Not to cross queue end. */
 477         pkts_n = RTE_MIN(pkts_n, q_n - elts_idx);
 478         pkts_n = RTE_MIN(pkts_n, q_n - cq_idx);
 479         if (!pkts_n) {
 480                 *no_cq = !rcvd_pkt;
 481                 return rcvd_pkt;
 482         }
 483         /* At this point, there shouldn't be any remained packets. */
 484         MLX5_ASSERT(rxq->decompressed == 0);
 485         /*
 486          * A. load first Qword (8bytes) in one loop.
 487          * B. copy 4 mbuf pointers from elts ring to returing pkts.
 488          * C. load remained CQE data and extract necessary fields.
 489          *    Final 16bytes cqes[] extracted from original 64bytes CQE has the
 490          *    following structure:
 491          *        struct {
 492          *          uint8_t  pkt_info;
 493          *          uint8_t  flow_tag[3];
 494          *          uint16_t byte_cnt;
 495          *          uint8_t  rsvd4;
 496          *          uint8_t  op_own;
 497          *          uint16_t hdr_type_etc;
 498          *          uint16_t vlan_info;
 499          *          uint32_t rx_has_res;
 500          *        } c;
 501          * D. fill in mbuf.
 502          * E. get valid CQEs.
 503          * F. find compressed CQE.
 504          */
 505         for (pos = 0;
 506              pos < pkts_n;
 507              pos += MLX5_VPMD_DESCS_PER_LOOP) {
 508                 __m128i cqes[MLX5_VPMD_DESCS_PER_LOOP];
 509                 __m128i cqe_tmp1, cqe_tmp2;
 510                 __m128i pkt_mb0, pkt_mb1, pkt_mb2, pkt_mb3;
 511                 __m128i op_own, op_own_tmp1, op_own_tmp2;
 512                 __m128i opcode, owner_mask, invalid_mask;
 513                 __m128i comp_mask;
 514                 __m128i mask;
 515 #ifdef MLX5_PMD_SOFT_COUNTERS
 516                 __m128i byte_cnt;
 517 #endif
 518                 __m128i mbp1, mbp2;
 519                 __m128i p = _mm_set_epi16(0, 0, 0, 0, 3, 2, 1, 0);
 520                 unsigned int p1, p2, p3;
 521
 522                 /* Prefetch next 4 CQEs. */
 523                 if (pkts_n - pos >= 2 * MLX5_VPMD_DESCS_PER_LOOP) {
 524                         rte_prefetch0(&cq[pos + MLX5_VPMD_DESCS_PER_LOOP]);
 525                         rte_prefetch0(&cq[pos + MLX5_VPMD_DESCS_PER_LOOP + 1]);
 526                         rte_prefetch0(&cq[pos + MLX5_VPMD_DESCS_PER_LOOP + 2]);
 527                         rte_prefetch0(&cq[pos + MLX5_VPMD_DESCS_PER_LOOP + 3]);
 528                 }
 529                 /* A.0 do not cross the end of CQ. */
 530                 mask = _mm_set_epi64x(0, (pkts_n - pos) * sizeof(uint16_t) * 8);
 531                 mask = _mm_sll_epi64(ones, mask);
 532                 p = _mm_andnot_si128(mask, p);
 533                 /* A.1 load cqes. */
 534                 p3 = _mm_extract_epi16(p, 3);
 535                 cqes[3] = _mm_loadl_epi64((__m128i *)
 536                                            &cq[pos + p3].sop_drop_qpn);
 537                 rte_compiler_barrier();
 538                 p2 = _mm_extract_epi16(p, 2);
 539                 cqes[2] = _mm_loadl_epi64((__m128i *)
 540                                            &cq[pos + p2].sop_drop_qpn);
 541                 rte_compiler_barrier();
 542                 /* B.1 load mbuf pointers. */
 543                 mbp1 = _mm_loadu_si128((__m128i *)&elts[pos]);
 544                 mbp2 = _mm_loadu_si128((__m128i *)&elts[pos + 2]);
 545                 /* A.1 load a block having op_own. */
 546                 p1 = _mm_extract_epi16(p, 1);
 547                 cqes[1] = _mm_loadl_epi64((__m128i *)
 548                                            &cq[pos + p1].sop_drop_qpn);
 549                 rte_compiler_barrier();
 550                 cqes[0] = _mm_loadl_epi64((__m128i *)
 551                                            &cq[pos].sop_drop_qpn);
 552                 /* B.2 copy mbuf pointers. */
 553                 _mm_storeu_si128((__m128i *)&pkts[pos], mbp1);
 554                 _mm_storeu_si128((__m128i *)&pkts[pos + 2], mbp2);
 555                 rte_cio_rmb();
 556                 /* C.1 load remained CQE data and extract necessary fields. */
 557                 cqe_tmp2 = _mm_load_si128((__m128i *)&cq[pos + p3]);
 558                 cqe_tmp1 = _mm_load_si128((__m128i *)&cq[pos + p2]);
 559                 cqes[3] = _mm_blendv_epi8(cqes[3], cqe_tmp2, blend_mask);
 560                 cqes[2] = _mm_blendv_epi8(cqes[2], cqe_tmp1, blend_mask);
 561                 cqe_tmp2 = _mm_loadu_si128((__m128i *)&cq[pos + p3].csum);
 562                 cqe_tmp1 = _mm_loadu_si128((__m128i *)&cq[pos + p2].csum);
 563                 cqes[3] = _mm_blend_epi16(cqes[3], cqe_tmp2, 0x30);
 564                 cqes[2] = _mm_blend_epi16(cqes[2], cqe_tmp1, 0x30);
 565                 cqe_tmp2 = _mm_loadl_epi64((__m128i *)&cq[pos + p3].rsvd4[2]);
 566                 cqe_tmp1 = _mm_loadl_epi64((__m128i *)&cq[pos + p2].rsvd4[2]);
 567                 cqes[3] = _mm_blend_epi16(cqes[3], cqe_tmp2, 0x04);
 568                 cqes[2] = _mm_blend_epi16(cqes[2], cqe_tmp1, 0x04);
 569                 /* C.2 generate final structure for mbuf with swapping bytes. */
 570                 pkt_mb3 = _mm_shuffle_epi8(cqes[3], shuf_mask);
 571                 pkt_mb2 = _mm_shuffle_epi8(cqes[2], shuf_mask);
 572                 /* C.3 adjust CRC length. */
 573                 pkt_mb3 = _mm_sub_epi16(pkt_mb3, crc_adj);
 574                 pkt_mb2 = _mm_sub_epi16(pkt_mb2, crc_adj);
 575                 /* C.4 adjust flow mark. */
 576                 pkt_mb3 = _mm_add_epi32(pkt_mb3, flow_mark_adj);
 577                 pkt_mb2 = _mm_add_epi32(pkt_mb2, flow_mark_adj);
 578                 /* D.1 fill in mbuf - rx_descriptor_fields1. */
 579                 _mm_storeu_si128((void *)&pkts[pos + 3]->pkt_len, pkt_mb3);
 580                 _mm_storeu_si128((void *)&pkts[pos + 2]->pkt_len, pkt_mb2);
 581                 /* E.1 extract op_own field. */
 582                 op_own_tmp2 = _mm_unpacklo_epi32(cqes[2], cqes[3]);
 583                 /* C.1 load remained CQE data and extract necessary fields. */
 584                 cqe_tmp2 = _mm_load_si128((__m128i *)&cq[pos + p1]);
 585                 cqe_tmp1 = _mm_load_si128((__m128i *)&cq[pos]);
 586                 cqes[1] = _mm_blendv_epi8(cqes[1], cqe_tmp2, blend_mask);
 587                 cqes[0] = _mm_blendv_epi8(cqes[0], cqe_tmp1, blend_mask);
 588                 cqe_tmp2 = _mm_loadu_si128((__m128i *)&cq[pos + p1].csum);
 589                 cqe_tmp1 = _mm_loadu_si128((__m128i *)&cq[pos].csum);
 590                 cqes[1] = _mm_blend_epi16(cqes[1], cqe_tmp2, 0x30);
 591                 cqes[0] = _mm_blend_epi16(cqes[0], cqe_tmp1, 0x30);
 592                 cqe_tmp2 = _mm_loadl_epi64((__m128i *)&cq[pos + p1].rsvd4[2]);
 593                 cqe_tmp1 = _mm_loadl_epi64((__m128i *)&cq[pos].rsvd4[2]);
 594                 cqes[1] = _mm_blend_epi16(cqes[1], cqe_tmp2, 0x04);
 595                 cqes[0] = _mm_blend_epi16(cqes[0], cqe_tmp1, 0x04);
 596                 /* C.2 generate final structure for mbuf with swapping bytes. */
 597                 pkt_mb1 = _mm_shuffle_epi8(cqes[1], shuf_mask);
 598                 pkt_mb0 = _mm_shuffle_epi8(cqes[0], shuf_mask);
 599                 /* C.3 adjust CRC length. */
 600                 pkt_mb1 = _mm_sub_epi16(pkt_mb1, crc_adj);
 601                 pkt_mb0 = _mm_sub_epi16(pkt_mb0, crc_adj);
 602                 /* C.4 adjust flow mark. */
 603                 pkt_mb1 = _mm_add_epi32(pkt_mb1, flow_mark_adj);
 604                 pkt_mb0 = _mm_add_epi32(pkt_mb0, flow_mark_adj);
 605                 /* E.1 extract op_own byte. */
 606                 op_own_tmp1 = _mm_unpacklo_epi32(cqes[0], cqes[1]);
 607                 op_own = _mm_unpackhi_epi64(op_own_tmp1, op_own_tmp2);
 608                 /* D.1 fill in mbuf - rx_descriptor_fields1. */
 609                 _mm_storeu_si128((void *)&pkts[pos + 1]->pkt_len, pkt_mb1);
 610                 _mm_storeu_si128((void *)&pkts[pos]->pkt_len, pkt_mb0);
 611                 /* E.2 flip owner bit to mark CQEs from last round. */
 612                 owner_mask = _mm_and_si128(op_own, owner_check);
 613                 if (ownership)
 614                         owner_mask = _mm_xor_si128(owner_mask, owner_check);
 615                 owner_mask = _mm_cmpeq_epi32(owner_mask, owner_check);
 616                 owner_mask = _mm_packs_epi32(owner_mask, zero);
 617                 /* E.3 get mask for invalidated CQEs. */
 618                 opcode = _mm_and_si128(op_own, opcode_check);
 619                 invalid_mask = _mm_cmpeq_epi32(opcode_check, opcode);
 620                 invalid_mask = _mm_packs_epi32(invalid_mask, zero);
 621                 /* E.4 mask out beyond boundary. */
 622                 invalid_mask = _mm_or_si128(invalid_mask, mask);
 623                 /* E.5 merge invalid_mask with invalid owner. */
 624                 invalid_mask = _mm_or_si128(invalid_mask, owner_mask);
 625                 /* F.1 find compressed CQE format. */
 626                 comp_mask = _mm_and_si128(op_own, format_check);
 627                 comp_mask = _mm_cmpeq_epi32(comp_mask, format_check);
 628                 comp_mask = _mm_packs_epi32(comp_mask, zero);
 629                 /* F.2 mask out invalid entries. */
 630                 comp_mask = _mm_andnot_si128(invalid_mask, comp_mask);
 631                 comp_idx = _mm_cvtsi128_si64(comp_mask);
 632                 /* F.3 get the first compressed CQE. */
 633                 comp_idx = comp_idx ?
 634                                 __builtin_ctzll(comp_idx) /
 635                                         (sizeof(uint16_t) * 8) :
 636                                 MLX5_VPMD_DESCS_PER_LOOP;
 637                 /* E.6 mask out entries after the compressed CQE. */
 638                 mask = _mm_set_epi64x(0, comp_idx * sizeof(uint16_t) * 8);
 639                 mask = _mm_sll_epi64(ones, mask);
 640                 invalid_mask = _mm_or_si128(invalid_mask, mask);
 641                 /* E.7 count non-compressed valid CQEs. */
 642                 n = _mm_cvtsi128_si64(invalid_mask);
 643                 n = n ? __builtin_ctzll(n) / (sizeof(uint16_t) * 8) :
 644                         MLX5_VPMD_DESCS_PER_LOOP;
 645                 nocmp_n += n;
 646                 /* D.2 get the final invalid mask. */
 647                 mask = _mm_set_epi64x(0, n * sizeof(uint16_t) * 8);
 648                 mask = _mm_sll_epi64(ones, mask);
 649                 invalid_mask = _mm_or_si128(invalid_mask, mask);
 650                 /* D.3 check error in opcode. */
 651                 opcode = _mm_cmpeq_epi32(resp_err_check, opcode);
 652                 opcode = _mm_packs_epi32(opcode, zero);
 653                 opcode = _mm_andnot_si128(invalid_mask, opcode);
 654                 /* D.4 mark if any error is set */
 655                 *err |= _mm_cvtsi128_si64(opcode);
 656                 /* D.5 fill in mbuf - rearm_data and packet_type. */
 657                 rxq_cq_to_ptype_oflags_v(rxq, cqes, opcode, &pkts[pos]);
 658                 if (rxq->hw_timestamp) {
 659                         if (rxq->rt_timestamp) {
 660                                 struct mlx5_dev_ctx_shared *sh = rxq->sh;
 661                                 uint64_t ts;
 662
 663                                 ts = rte_be_to_cpu_64(cq[pos].timestamp);
 664                                 pkts[pos]->timestamp =
 665                                         mlx5_txpp_convert_rx_ts(sh, ts);
 666                                 ts = rte_be_to_cpu_64(cq[pos + p1].timestamp);
 667                                 pkts[pos + 1]->timestamp =
 668                                         mlx5_txpp_convert_rx_ts(sh, ts);
 669                                 ts = rte_be_to_cpu_64(cq[pos + p2].timestamp);
 670                                 pkts[pos + 2]->timestamp =
 671                                         mlx5_txpp_convert_rx_ts(sh, ts);
 672                                 ts = rte_be_to_cpu_64(cq[pos + p3].timestamp);
 673                                 pkts[pos + 3]->timestamp =
 674                                         mlx5_txpp_convert_rx_ts(sh, ts);
 675                         } else {
 676                                 pkts[pos]->timestamp = rte_be_to_cpu_64
 677                                                 (cq[pos].timestamp);
 678                                 pkts[pos + 1]->timestamp = rte_be_to_cpu_64
 679                                                 (cq[pos + p1].timestamp);
 680                                 pkts[pos + 2]->timestamp = rte_be_to_cpu_64
 681                                                 (cq[pos + p2].timestamp);
 682                                 pkts[pos + 3]->timestamp = rte_be_to_cpu_64
 683                                                 (cq[pos + p3].timestamp);
 684                         }
 685                 }
 686                 if (rxq->dynf_meta) {
 687                         /* This code is subject for futher optimization. */
 688                         int32_t offs = rxq->flow_meta_offset;
 689
 690                         *RTE_MBUF_DYNFIELD(pkts[pos], offs, uint32_t *) =
 691                                 cq[pos].flow_table_metadata;
 692                         *RTE_MBUF_DYNFIELD(pkts[pos + 1], offs, uint32_t *) =
 693                                 cq[pos + p1].flow_table_metadata;
 694                         *RTE_MBUF_DYNFIELD(pkts[pos + 2], offs, uint32_t *) =
 695                                 cq[pos + p2].flow_table_metadata;
 696                         *RTE_MBUF_DYNFIELD(pkts[pos + 3], offs, uint32_t *) =
 697                                 cq[pos + p3].flow_table_metadata;
 698                         if (*RTE_MBUF_DYNFIELD(pkts[pos], offs, uint32_t *))
 699                                 pkts[pos]->ol_flags |= rxq->flow_meta_mask;
 700                         if (*RTE_MBUF_DYNFIELD(pkts[pos + 1], offs, uint32_t *))
 701                                 pkts[pos + 1]->ol_flags |= rxq->flow_meta_mask;
 702                         if (*RTE_MBUF_DYNFIELD(pkts[pos + 2], offs, uint32_t *))
 703                                 pkts[pos + 2]->ol_flags |= rxq->flow_meta_mask;
 704                         if (*RTE_MBUF_DYNFIELD(pkts[pos + 3], offs, uint32_t *))
 705                                 pkts[pos + 3]->ol_flags |= rxq->flow_meta_mask;
 706                 }
 707 #ifdef MLX5_PMD_SOFT_COUNTERS
 708                 /* Add up received bytes count. */
 709                 byte_cnt = _mm_shuffle_epi8(op_own, len_shuf_mask);
 710                 byte_cnt = _mm_andnot_si128(invalid_mask, byte_cnt);
 711                 byte_cnt = _mm_hadd_epi16(byte_cnt, zero);
 712                 rcvd_byte += _mm_cvtsi128_si64(_mm_hadd_epi16(byte_cnt, zero));
 713 #endif
 714                 /*
 715                  * Break the loop unless more valid CQE is expected, or if
 716                  * there's a compressed CQE.
 717                  */
 718                 if (n != MLX5_VPMD_DESCS_PER_LOOP)
 719                         break;
 720         }
 721         /* If no new CQE seen, return without updating cq_db. */
 722         if (unlikely(!nocmp_n && comp_idx == MLX5_VPMD_DESCS_PER_LOOP)) {
 723                 *no_cq = true;
 724                 return rcvd_pkt;
 725         }
 726         /* Update the consumer indexes for non-compressed CQEs. */
 727         MLX5_ASSERT(nocmp_n <= pkts_n);
 728         rxq->cq_ci += nocmp_n;
 729         rxq->rq_pi += nocmp_n;
 730         rcvd_pkt += nocmp_n;
 731 #ifdef MLX5_PMD_SOFT_COUNTERS
 732         rxq->stats.ipackets += nocmp_n;
 733         rxq->stats.ibytes += rcvd_byte;
 734 #endif
 735         /* Decompress the last CQE if compressed. */
 736         if (comp_idx < MLX5_VPMD_DESCS_PER_LOOP && comp_idx == n) {
 737                 MLX5_ASSERT(comp_idx == (nocmp_n % MLX5_VPMD_DESCS_PER_LOOP));
 738                 rxq->decompressed = rxq_cq_decompress_v(rxq, &cq[nocmp_n],
 739                                                         &elts[nocmp_n]);
 740                 /* Return more packets if needed. */
 741                 if (nocmp_n < pkts_n) {
 742                         uint16_t n = rxq->decompressed;
 743
 744                         n = RTE_MIN(n, pkts_n - nocmp_n);
 745                         rxq_copy_mbuf_v(rxq, &pkts[nocmp_n], n);
 746                         rxq->rq_pi += n;
 747                         rcvd_pkt += n;
 748                         rxq->decompressed -= n;
 749                 }
 750         }
 751         rte_compiler_barrier();
 752         *rxq->cq_db = rte_cpu_to_be_32(rxq->cq_ci);
 753         *no_cq = !rcvd_pkt;
 754         return rcvd_pkt;
 755 }
 756
 757 #endif /* RTE_PMD_MLX5_RXTX_VEC_SSE_H_ */