drivers/net/mlx5/mlx5_rxtx_vec_altivec.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_ALTIVEC_H_
   7 #define RTE_PMD_MLX5_RXTX_VEC_ALTIVEC_H_
   8
   9 #include <stdint.h>
  10 #include <string.h>
  11 #include <stdlib.h>
  12
  13 #include <altivec.h>
  14
  15 #include <rte_mbuf.h>
  16 #include <rte_mempool.h>
  17 #include <rte_prefetch.h>
  18
  19 #include <mlx5_prm.h>
  20
  21 #include "mlx5_defs.h"
  22 #include "mlx5.h"
  23 #include "mlx5_utils.h"
  24 #include "mlx5_rxtx.h"
  25 #include "mlx5_rxtx_vec.h"
  26 #include "mlx5_autoconf.h"
  27
  28 #ifndef __INTEL_COMPILER
  29 #pragma GCC diagnostic ignored "-Wcast-qual"
  30 #pragma GCC diagnostic ignored "-Wstrict-aliasing"
  31 #endif
  32
  33 /**
  34  * Store free buffers to RX SW ring.
  35  *
  36  * @param rxq
  37  *   Pointer to RX queue structure.
  38  * @param pkts
  39  *   Pointer to array of packets to be stored.
  40  * @param pkts_n
  41  *   Number of packets to be stored.
  42  */
  43 static inline void
  44 rxq_copy_mbuf_v(struct mlx5_rxq_data *rxq, struct rte_mbuf **pkts, uint16_t n)
  45 {
  46         const uint16_t q_mask = (1 << rxq->elts_n) - 1;
  47         struct rte_mbuf **elts = &(*rxq->elts)[rxq->rq_pi & q_mask];
  48         unsigned int pos;
  49         uint16_t p = n & -2;
  50
  51         for (pos = 0; pos < p; pos += 2) {
  52                 vector unsigned char mbp;
  53
  54                 mbp = (vector unsigned char)vec_vsx_ld(0,
  55                                 (signed int const *)&elts[pos]);
  56                 *(vector unsigned char *)&pkts[pos] = mbp;
  57         }
  58         if (n & 1)
  59                 pkts[pos] = elts[pos];
  60 }
  61
  62 /**
  63  * Decompress a compressed completion and fill in mbufs in RX SW ring with data
  64  * extracted from the title completion descriptor.
  65  *
  66  * @param rxq
  67  *   Pointer to RX queue structure.
  68  * @param cq
  69  *   Pointer to completion array having a compressed completion at first.
  70  * @param elts
  71  *   Pointer to SW ring to be filled. The first mbuf has to be pre-built from
  72  *   the title completion descriptor to be copied to the rest of mbufs.
  73  *
  74  * @return
  75  *   Number of mini-CQEs successfully decompressed.
  76  */
  77 static inline uint16_t
  78 rxq_cq_decompress_v(struct mlx5_rxq_data *rxq, volatile struct mlx5_cqe *cq,
  79                     struct rte_mbuf **elts)
  80 {
  81         volatile struct mlx5_mini_cqe8 *mcq = (void *)&(cq + 1)->pkt_info;
  82         struct rte_mbuf *t_pkt = elts[0]; /* Title packet is pre-built. */
  83         const vector unsigned char zero = (vector unsigned char){0};
  84         /* Mask to shuffle from extracted mini CQE to mbuf. */
  85         const vector unsigned char shuf_mask1 = (vector unsigned char){
  86                         -1, -1, -1, -1,   /* skip packet_type */
  87                          7,  6, -1, -1,   /* bswap16, pkt_len */
  88                          7,  6,           /* bswap16, data_len */
  89                         -1, -1,           /* skip vlan_tci */
  90                          3,  2,  1,  0};  /* bswap32, rss */
  91         const vector unsigned char shuf_mask2 = (vector unsigned char){
  92                         -1, -1, -1, -1,   /* skip packet_type */
  93                         15, 14, -1, -1,   /* bswap16, pkt_len */
  94                         15, 14,           /* data_len, bswap16 */
  95                         -1, -1,           /* skip vlan_tci */
  96                         11, 10,  9,  8};  /* bswap32, rss */
  97         /* Restore the compressed count. Must be 16 bits. */
  98         const uint16_t mcqe_n = t_pkt->data_len +
  99                 (rxq->crc_present * RTE_ETHER_CRC_LEN);
 100         const vector unsigned char rearm =
 101                 (vector unsigned char)vec_vsx_ld(0,
 102                 (signed int const *)&t_pkt->rearm_data);
 103         const vector unsigned char rxdf =
 104                 (vector unsigned char)vec_vsx_ld(0,
 105                 (signed int const *)&t_pkt->rx_descriptor_fields1);
 106         const vector unsigned char crc_adj =
 107                 (vector unsigned char)(vector unsigned short){
 108                         0, 0, rxq->crc_present * RTE_ETHER_CRC_LEN, 0,
 109                         rxq->crc_present * RTE_ETHER_CRC_LEN, 0, 0, 0};
 110         const vector unsigned short rxdf_sel_mask =
 111                 (vector unsigned short){
 112                         0xffff, 0xffff, 0, 0, 0, 0xffff, 0, 0};
 113         const uint32_t flow_tag = t_pkt->hash.fdir.hi;
 114         unsigned int pos;
 115         unsigned int i;
 116         unsigned int inv = 0;
 117
 118 #ifdef MLX5_PMD_SOFT_COUNTERS
 119         const vector unsigned char ones = vec_splat_u8(-1);
 120         uint32_t rcvd_byte = 0;
 121         /* Mask to shuffle byte_cnt to add up stats. Do bswap16 for all. */
 122         const vector unsigned char len_shuf_mask = (vector unsigned char){
 123                  3,  2, 11, 10,
 124                  7,  6, 15, 14,
 125                 -1, -1, -1, -1,
 126                 -1, -1, -1, -1};
 127 #endif
 128
 129         /*
 130          * A. load mCQEs into a 128bit register.
 131          * B. store rearm data to mbuf.
 132          * C. combine data from mCQEs with rx_descriptor_fields1.
 133          * D. store rx_descriptor_fields1.
 134          * E. store flow tag (rte_flow mark).
 135          */
 136         for (pos = 0; pos < mcqe_n; ) {
 137                 vector unsigned char mcqe1, mcqe2;
 138                 vector unsigned char rxdf1, rxdf2;
 139 #ifdef MLX5_PMD_SOFT_COUNTERS
 140                 const vector unsigned short mcqe_sel_mask =
 141                         (vector unsigned short){0, 0, 0xffff, 0xffff,
 142                         0, 0, 0xfff, 0xffff};
 143                 const vector unsigned char lower_half = {
 144                         0, 1, 4, 5, 8, 9, 12, 13, 16,
 145                         17, 20, 21, 24, 25, 28, 29};
 146                 const vector unsigned char upper_half = {
 147                         2, 3, 6, 7, 10, 11, 14, 15,
 148                         18, 19, 22, 23, 26, 27, 30, 31};
 149                 vector unsigned short left, right;
 150                 vector unsigned char byte_cnt, invalid_mask;
 151                 vector unsigned long lshift;
 152                 __attribute__((altivec(vector__)))
 153                         __attribute__((altivec(bool__)))
 154                         unsigned long long shmask;
 155                 const vector unsigned long shmax = {64, 64};
 156 #endif
 157
 158                 for (i = 0; i < MLX5_VPMD_DESCS_PER_LOOP; ++i)
 159                         if (likely(pos + i < mcqe_n))
 160                                 rte_prefetch0((void *)(cq + pos + i));
 161
 162                 /* A.1 load mCQEs into a 128bit register. */
 163                 mcqe1 = (vector unsigned char)vec_vsx_ld(0,
 164                         (signed int const *)&mcq[pos % 8]);
 165                 mcqe2 = (vector unsigned char)vec_vsx_ld(0,
 166                         (signed int const *)&mcq[pos % 8 + 2]);
 167
 168                 /* B.1 store rearm data to mbuf. */
 169                 *(vector unsigned char *)
 170                         &elts[pos]->rearm_data = rearm;
 171                 *(vector unsigned char *)
 172                         &elts[pos + 1]->rearm_data = rearm;
 173
 174                 /* C.1 combine data from mCQEs with rx_descriptor_fields1. */
 175                 rxdf1 = vec_perm(mcqe1, zero, shuf_mask1);
 176                 rxdf2 = vec_perm(mcqe1, zero, shuf_mask2);
 177                 rxdf1 = (vector unsigned char)
 178                         ((vector unsigned short)rxdf1 -
 179                         (vector unsigned short)crc_adj);
 180                 rxdf2 = (vector unsigned char)
 181                         ((vector unsigned short)rxdf2 -
 182                         (vector unsigned short)crc_adj);
 183                 rxdf1 = (vector unsigned char)
 184                         vec_sel((vector unsigned short)rxdf1,
 185                         (vector unsigned short)rxdf, rxdf_sel_mask);
 186                 rxdf2 = (vector unsigned char)
 187                         vec_sel((vector unsigned short)rxdf2,
 188                         (vector unsigned short)rxdf, rxdf_sel_mask);
 189
 190                 /* D.1 store rx_descriptor_fields1. */
 191                 *(vector unsigned char *)
 192                         &elts[pos]->rx_descriptor_fields1 = rxdf1;
 193                 *(vector unsigned char *)
 194                         &elts[pos + 1]->rx_descriptor_fields1 = rxdf2;
 195
 196                 /* B.1 store rearm data to mbuf. */
 197                 *(vector unsigned char *)
 198                         &elts[pos + 2]->rearm_data = rearm;
 199                 *(vector unsigned char *)
 200                         &elts[pos + 3]->rearm_data = rearm;
 201
 202                 /* C.1 combine data from mCQEs with rx_descriptor_fields1. */
 203                 rxdf1 = vec_perm(mcqe2, zero, shuf_mask1);
 204                 rxdf2 = vec_perm(mcqe2, zero, shuf_mask2);
 205                 rxdf1 = (vector unsigned char)
 206                         ((vector unsigned short)rxdf1 -
 207                         (vector unsigned short)crc_adj);
 208                 rxdf2 = (vector unsigned char)
 209                         ((vector unsigned short)rxdf2 -
 210                         (vector unsigned short)crc_adj);
 211                 rxdf1 = (vector unsigned char)
 212                         vec_sel((vector unsigned short)rxdf1,
 213                         (vector unsigned short)rxdf, rxdf_sel_mask);
 214                 rxdf2 = (vector unsigned char)
 215                         vec_sel((vector unsigned short)rxdf2,
 216                         (vector unsigned short)rxdf, rxdf_sel_mask);
 217
 218                 /* D.1 store rx_descriptor_fields1. */
 219                 *(vector unsigned char *)
 220                         &elts[pos + 2]->rx_descriptor_fields1 = rxdf1;
 221                 *(vector unsigned char *)
 222                         &elts[pos + 3]->rx_descriptor_fields1 = rxdf2;
 223
 224 #ifdef MLX5_PMD_SOFT_COUNTERS
 225                 invalid_mask = (vector unsigned char)(vector unsigned long){
 226                         (mcqe_n - pos) * sizeof(uint16_t) * 8, 0};
 227
 228                 lshift =
 229                         vec_splat((vector unsigned long)invalid_mask, 0);
 230                 shmask = vec_cmpgt(shmax, lshift);
 231                 invalid_mask = (vector unsigned char)
 232                         vec_sl((vector unsigned long)ones, lshift);
 233                 invalid_mask = (vector unsigned char)
 234                         vec_sel((vector unsigned long)shmask,
 235                         (vector unsigned long)invalid_mask, shmask);
 236
 237                 mcqe1 = (vector unsigned char)
 238                         vec_sro((vector unsigned short)mcqe1,
 239                         (vector unsigned char){32}),
 240                 byte_cnt = (vector unsigned char)
 241                         vec_sel((vector unsigned short)mcqe1,
 242                         (vector unsigned short)mcqe2, mcqe_sel_mask);
 243                 byte_cnt = vec_perm(byte_cnt, zero, len_shuf_mask);
 244                 byte_cnt = (vector unsigned char)
 245                         vec_andc((vector unsigned long)byte_cnt,
 246                         (vector unsigned long)invalid_mask);
 247                 left = vec_perm((vector unsigned short)byte_cnt,
 248                         (vector unsigned short)zero, lower_half);
 249                 right = vec_perm((vector unsigned short)byte_cnt,
 250                         (vector unsigned short)zero, upper_half);
 251                 byte_cnt = (vector unsigned char)vec_add(left, right);
 252                 left = vec_perm((vector unsigned short)byte_cnt,
 253                         (vector unsigned short)zero, lower_half);
 254                 right = vec_perm((vector unsigned short)byte_cnt,
 255                         (vector unsigned short)zero, upper_half);
 256                 byte_cnt = (vector unsigned char)vec_add(left, right);
 257                 rcvd_byte += ((vector unsigned long)byte_cnt)[0];
 258 #endif
 259
 260                 if (rxq->mark) {
 261                         /* E.1 store flow tag (rte_flow mark). */
 262                         elts[pos]->hash.fdir.hi = flow_tag;
 263                         elts[pos + 1]->hash.fdir.hi = flow_tag;
 264                         elts[pos + 2]->hash.fdir.hi = flow_tag;
 265                         elts[pos + 3]->hash.fdir.hi = flow_tag;
 266                 }
 267                 if (rte_flow_dynf_metadata_avail()) {
 268                         const uint32_t meta = *RTE_FLOW_DYNF_METADATA(t_pkt);
 269
 270                         /* Check if title packet has valid metadata. */
 271                         if (meta) {
 272                                 MLX5_ASSERT(t_pkt->ol_flags &
 273                                             PKT_RX_DYNF_METADATA);
 274                                 *RTE_FLOW_DYNF_METADATA(elts[pos]) = meta;
 275                                 *RTE_FLOW_DYNF_METADATA(elts[pos + 1]) = meta;
 276                                 *RTE_FLOW_DYNF_METADATA(elts[pos + 2]) = meta;
 277                                 *RTE_FLOW_DYNF_METADATA(elts[pos + 3]) = meta;
 278                         }
 279                 }
 280
 281                 pos += MLX5_VPMD_DESCS_PER_LOOP;
 282                 /* Move to next CQE and invalidate consumed CQEs. */
 283                 if (!(pos & 0x7) && pos < mcqe_n) {
 284                         mcq = (void *)&(cq + pos)->pkt_info;
 285                         for (i = 0; i < 8; ++i)
 286                                 cq[inv++].op_own = MLX5_CQE_INVALIDATE;
 287                 }
 288         }
 289
 290         /* Invalidate the rest of CQEs. */
 291         for (; inv < mcqe_n; ++inv)
 292                 cq[inv].op_own = MLX5_CQE_INVALIDATE;
 293
 294 #ifdef MLX5_PMD_SOFT_COUNTERS
 295         rxq->stats.ipackets += mcqe_n;
 296         rxq->stats.ibytes += rcvd_byte;
 297 #endif
 298
 299         rxq->cq_ci += mcqe_n;
 300         return mcqe_n;
 301 }
 302
 303 /**
 304  * Calculate packet type and offload flag for mbuf and store it.
 305  *
 306  * @param rxq
 307  *   Pointer to RX queue structure.
 308  * @param cqes[4]
 309  *   Array of four 16bytes completions extracted from the original completion
 310  *   descriptor.
 311  * @param op_err
 312  *   Opcode vector having responder error status. Each field is 4B.
 313  * @param pkts
 314  *   Pointer to array of packets to be filled.
 315  */
 316 static inline void
 317 rxq_cq_to_ptype_oflags_v(struct mlx5_rxq_data *rxq,
 318                 vector unsigned char cqes[4], vector unsigned char op_err,
 319                 struct rte_mbuf **pkts)
 320 {
 321         vector unsigned char pinfo0, pinfo1;
 322         vector unsigned char pinfo, ptype;
 323         vector unsigned char ol_flags = (vector unsigned char)
 324                 (vector unsigned int){
 325                         rxq->rss_hash * PKT_RX_RSS_HASH |
 326                                 rxq->hw_timestamp * PKT_RX_TIMESTAMP,
 327                         rxq->rss_hash * PKT_RX_RSS_HASH |
 328                                 rxq->hw_timestamp * PKT_RX_TIMESTAMP,
 329                         rxq->rss_hash * PKT_RX_RSS_HASH |
 330                                 rxq->hw_timestamp * PKT_RX_TIMESTAMP,
 331                         rxq->rss_hash * PKT_RX_RSS_HASH |
 332                                 rxq->hw_timestamp * PKT_RX_TIMESTAMP};
 333         vector unsigned char cv_flags;
 334         const vector unsigned char zero = (vector unsigned char){0};
 335         const vector unsigned char ptype_mask =
 336                 (vector unsigned char)(vector unsigned int){
 337                 0x0000fd06, 0x0000fd06, 0x0000fd06, 0x0000fd06};
 338         const vector unsigned char ptype_ol_mask =
 339                 (vector unsigned char)(vector unsigned int){
 340                 0x00000106, 0x00000106, 0x00000106, 0x00000106};
 341         const vector unsigned char pinfo_mask =
 342                 (vector unsigned char)(vector unsigned int){
 343                 0x00000003, 0x00000003, 0x00000003, 0x00000003};
 344         const vector unsigned char cv_flag_sel = (vector unsigned char){
 345                 0, (uint8_t)(PKT_RX_VLAN | PKT_RX_VLAN_STRIPPED),
 346                 (uint8_t)(PKT_RX_IP_CKSUM_GOOD >> 1), 0,
 347                 (uint8_t)(PKT_RX_L4_CKSUM_GOOD >> 1), 0,
 348                 (uint8_t)((PKT_RX_IP_CKSUM_GOOD | PKT_RX_L4_CKSUM_GOOD) >> 1),
 349                 0, 0, 0, 0, 0, 0, 0, 0, 0};
 350         const vector unsigned char cv_mask =
 351                 (vector unsigned char)(vector unsigned int){
 352                 PKT_RX_IP_CKSUM_GOOD | PKT_RX_L4_CKSUM_GOOD |
 353                 PKT_RX_VLAN | PKT_RX_VLAN_STRIPPED,
 354                 PKT_RX_IP_CKSUM_GOOD | PKT_RX_L4_CKSUM_GOOD |
 355                 PKT_RX_VLAN | PKT_RX_VLAN_STRIPPED,
 356                 PKT_RX_IP_CKSUM_GOOD | PKT_RX_L4_CKSUM_GOOD |
 357                 PKT_RX_VLAN | PKT_RX_VLAN_STRIPPED,
 358                 PKT_RX_IP_CKSUM_GOOD | PKT_RX_L4_CKSUM_GOOD |
 359                 PKT_RX_VLAN | PKT_RX_VLAN_STRIPPED};
 360         const vector unsigned char mbuf_init =
 361                 (vector unsigned char)vec_vsx_ld
 362                         (0, (vector unsigned char *)&rxq->mbuf_initializer);
 363         const vector unsigned short rearm_sel_mask =
 364                 (vector unsigned short){0, 0, 0, 0, 0xffff, 0xffff, 0, 0};
 365         vector unsigned char rearm0, rearm1, rearm2, rearm3;
 366         uint8_t pt_idx0, pt_idx1, pt_idx2, pt_idx3;
 367
 368         /* Extract pkt_info field. */
 369         pinfo0 = (vector unsigned char)
 370                 vec_mergeh((vector unsigned int)cqes[0],
 371                 (vector unsigned int)cqes[1]);
 372         pinfo1 = (vector unsigned char)
 373                 vec_mergeh((vector unsigned int)cqes[2],
 374                 (vector unsigned int)cqes[3]);
 375         pinfo = (vector unsigned char)
 376                 vec_mergeh((vector unsigned long)pinfo0,
 377                 (vector unsigned long)pinfo1);
 378
 379         /* Extract hdr_type_etc field. */
 380         pinfo0 = (vector unsigned char)
 381                 vec_mergel((vector unsigned int)cqes[0],
 382                 (vector unsigned int)cqes[1]);
 383         pinfo1 = (vector unsigned char)
 384                 vec_mergel((vector unsigned int)cqes[2],
 385                 (vector unsigned int)cqes[3]);
 386         ptype = (vector unsigned char)
 387                 vec_mergeh((vector unsigned long)pinfo0,
 388                 (vector unsigned long)pinfo1);
 389
 390         if (rxq->mark) {
 391                 const vector unsigned char pinfo_ft_mask =
 392                         (vector unsigned char)(vector unsigned int){
 393                         0xffffff00, 0xffffff00, 0xffffff00, 0xffffff00};
 394                 const vector unsigned char fdir_flags =
 395                         (vector unsigned char)(vector unsigned int){
 396                         PKT_RX_FDIR, PKT_RX_FDIR,
 397                         PKT_RX_FDIR, PKT_RX_FDIR};
 398                 vector unsigned char fdir_id_flags =
 399                         (vector unsigned char)(vector unsigned int){
 400                         PKT_RX_FDIR_ID, PKT_RX_FDIR_ID,
 401                         PKT_RX_FDIR_ID, PKT_RX_FDIR_ID};
 402                 vector unsigned char flow_tag, invalid_mask;
 403
 404                 flow_tag = (vector unsigned char)
 405                         vec_and((vector unsigned long)pinfo,
 406                         (vector unsigned long)pinfo_ft_mask);
 407
 408                 /* Check if flow tag is non-zero then set PKT_RX_FDIR. */
 409                 invalid_mask = (vector unsigned char)
 410                         vec_cmpeq((vector unsigned int)flow_tag,
 411                         (vector unsigned int)zero);
 412                 ol_flags = (vector unsigned char)
 413                         vec_or((vector unsigned long)ol_flags,
 414                         (vector unsigned long)
 415                         vec_andc((vector unsigned long)fdir_flags,
 416                         (vector unsigned long)invalid_mask));
 417
 418                 /* Mask out invalid entries. */
 419                 fdir_id_flags = (vector unsigned char)
 420                         vec_andc((vector unsigned long)fdir_id_flags,
 421                         (vector unsigned long)invalid_mask);
 422
 423                 /* Check if flow tag MLX5_FLOW_MARK_DEFAULT. */
 424                 ol_flags = (vector unsigned char)
 425                         vec_or((vector unsigned long)ol_flags,
 426                         (vector unsigned long)
 427                         vec_andc((vector unsigned long)fdir_id_flags,
 428                         (vector unsigned long)
 429                         vec_cmpeq((vector unsigned int)flow_tag,
 430                         (vector unsigned int)pinfo_ft_mask)));
 431         }
 432         /*
 433          * Merge the two fields to generate the following:
 434          * bit[1]     = l3_ok
 435          * bit[2]     = l4_ok
 436          * bit[8]     = cv
 437          * bit[11:10] = l3_hdr_type
 438          * bit[14:12] = l4_hdr_type
 439          * bit[15]    = ip_frag
 440          * bit[16]    = tunneled
 441          * bit[17]    = outer_l3_type
 442          */
 443         ptype = (vector unsigned char)
 444                 vec_and((vector unsigned long)ptype,
 445                 (vector unsigned long)ptype_mask);
 446         pinfo = (vector unsigned char)
 447                 vec_and((vector unsigned long)pinfo,
 448                 (vector unsigned long)pinfo_mask);
 449         pinfo = (vector unsigned char)
 450                 vec_sl((vector unsigned int)pinfo,
 451                 (vector unsigned int){16, 16, 16, 16});
 452
 453         /* Make pinfo has merged fields for ol_flags calculation. */
 454         pinfo = (vector unsigned char)
 455                 vec_or((vector unsigned long)ptype,
 456                 (vector unsigned long)pinfo);
 457         ptype = (vector unsigned char)
 458                 vec_sr((vector unsigned int)pinfo,
 459                 (vector unsigned int){10, 10, 10, 10});
 460         ptype = (vector unsigned char)
 461                 vec_packs((vector unsigned int)ptype,
 462                 (vector unsigned int)zero);
 463
 464         /* Errored packets will have RTE_PTYPE_ALL_MASK. */
 465         op_err = (vector unsigned char)
 466                 vec_sr((vector unsigned short)op_err,
 467                 (vector unsigned short){8, 8, 8, 8, 8, 8, 8, 8});
 468         ptype = (vector unsigned char)
 469                 vec_or((vector unsigned long)ptype,
 470                 (vector unsigned long)op_err);
 471
 472         pt_idx0 = (uint8_t)((vector unsigned char)ptype)[0];
 473         pt_idx1 = (uint8_t)((vector unsigned char)ptype)[2];
 474         pt_idx2 = (uint8_t)((vector unsigned char)ptype)[4];
 475         pt_idx3 = (uint8_t)((vector unsigned char)ptype)[6];
 476
 477         pkts[0]->packet_type = mlx5_ptype_table[pt_idx0] |
 478                 !!(pt_idx0 & (1 << 6)) * rxq->tunnel;
 479         pkts[1]->packet_type = mlx5_ptype_table[pt_idx1] |
 480                 !!(pt_idx1 & (1 << 6)) * rxq->tunnel;
 481         pkts[2]->packet_type = mlx5_ptype_table[pt_idx2] |
 482                 !!(pt_idx2 & (1 << 6)) * rxq->tunnel;
 483         pkts[3]->packet_type = mlx5_ptype_table[pt_idx3] |
 484                 !!(pt_idx3 & (1 << 6)) * rxq->tunnel;
 485
 486         /* Fill flags for checksum and VLAN. */
 487         pinfo = (vector unsigned char)
 488                 vec_and((vector unsigned long)pinfo,
 489                 (vector unsigned long)ptype_ol_mask);
 490         pinfo = vec_perm(cv_flag_sel, zero, pinfo);
 491
 492         /* Locate checksum flags at byte[2:1] and merge with VLAN flags. */
 493         cv_flags = (vector unsigned char)
 494                 vec_sl((vector unsigned int)pinfo,
 495                 (vector unsigned int){9, 9, 9, 9});
 496         cv_flags = (vector unsigned char)
 497                 vec_or((vector unsigned long)pinfo,
 498                 (vector unsigned long)cv_flags);
 499
 500         /* Move back flags to start from byte[0]. */
 501         cv_flags = (vector unsigned char)
 502                 vec_sr((vector unsigned int)cv_flags,
 503                 (vector unsigned int){8, 8, 8, 8});
 504
 505         /* Mask out garbage bits. */
 506         cv_flags = (vector unsigned char)
 507                 vec_and((vector unsigned long)cv_flags,
 508                 (vector unsigned long)cv_mask);
 509
 510         /* Merge to ol_flags. */
 511         ol_flags = (vector unsigned char)
 512                 vec_or((vector unsigned long)ol_flags,
 513                 (vector unsigned long)cv_flags);
 514
 515         /* Merge mbuf_init and ol_flags. */
 516         rearm0 = (vector unsigned char)
 517                 vec_sel((vector unsigned short)mbuf_init,
 518                 (vector unsigned short)
 519                 vec_slo((vector unsigned short)ol_flags,
 520                 (vector unsigned char){64}), rearm_sel_mask);
 521         rearm1 = (vector unsigned char)
 522                 vec_sel((vector unsigned short)mbuf_init,
 523                 (vector unsigned short)
 524                 vec_slo((vector unsigned short)ol_flags,
 525                 (vector unsigned char){32}), rearm_sel_mask);
 526         rearm2 = (vector unsigned char)
 527                 vec_sel((vector unsigned short)mbuf_init,
 528                 (vector unsigned short)ol_flags, rearm_sel_mask);
 529         rearm3 = (vector unsigned char)
 530                 vec_sel((vector unsigned short)mbuf_init,
 531                 (vector unsigned short)
 532                 vec_sro((vector unsigned short)ol_flags,
 533                 (vector unsigned char){32}), rearm_sel_mask);
 534
 535         /* Write 8B rearm_data and 8B ol_flags. */
 536         vec_vsx_st(rearm0, 0,
 537                 (vector unsigned char *)&pkts[0]->rearm_data);
 538         vec_vsx_st(rearm1, 0,
 539                 (vector unsigned char *)&pkts[1]->rearm_data);
 540         vec_vsx_st(rearm2, 0,
 541                 (vector unsigned char *)&pkts[2]->rearm_data);
 542         vec_vsx_st(rearm3, 0,
 543                 (vector unsigned char *)&pkts[3]->rearm_data);
 544 }
 545
 546
 547 /**
 548  * Receive burst of packets. An errored completion also consumes a mbuf, but the
 549  * packet_type is set to be RTE_PTYPE_ALL_MASK. Marked mbufs should be freed
 550  * before returning to application.
 551  *
 552  * @param rxq
 553  *   Pointer to RX queue structure.
 554  * @param[out] pkts
 555  *   Array to store received packets.
 556  * @param pkts_n
 557  *   Maximum number of packets in array.
 558  * @param[out] err
 559  *   Pointer to a flag. Set non-zero value if pkts array has at least one error
 560  *   packet to handle.
 561  *
 562  * @return
 563  *   Number of packets received including errors (<= pkts_n).
 564  */
 565 static inline uint16_t
 566 rxq_burst_v(struct mlx5_rxq_data *rxq, struct rte_mbuf **pkts, uint16_t pkts_n,
 567             uint64_t *err)
 568 {
 569         const uint16_t q_n = 1 << rxq->cqe_n;
 570         const uint16_t q_mask = q_n - 1;
 571         volatile struct mlx5_cqe *cq;
 572         struct rte_mbuf **elts;
 573         unsigned int pos;
 574         uint64_t n;
 575         uint16_t repl_n;
 576         uint64_t comp_idx = MLX5_VPMD_DESCS_PER_LOOP;
 577         uint16_t nocmp_n = 0;
 578         uint16_t rcvd_pkt = 0;
 579         unsigned int cq_idx = rxq->cq_ci & q_mask;
 580         unsigned int elts_idx;
 581         unsigned int ownership = !!(rxq->cq_ci & (q_mask + 1));
 582         const vector unsigned char zero = (vector unsigned char){0};
 583         const vector unsigned char ones = vec_splat_u8(-1);
 584         const vector unsigned char owner_check =
 585                 (vector unsigned char)(vector unsigned long){
 586                 0x0100000001000000LL, 0x0100000001000000LL};
 587         const vector unsigned char opcode_check =
 588                 (vector unsigned char)(vector unsigned long){
 589                 0xf0000000f0000000LL, 0xf0000000f0000000LL};
 590         const vector unsigned char format_check =
 591                 (vector unsigned char)(vector unsigned long){
 592                 0x0c0000000c000000LL, 0x0c0000000c000000LL};
 593         const vector unsigned char resp_err_check =
 594                 (vector unsigned char)(vector unsigned long){
 595                 0xe0000000e0000000LL, 0xe0000000e0000000LL};
 596 #ifdef MLX5_PMD_SOFT_COUNTERS
 597         uint32_t rcvd_byte = 0;
 598         /* Mask to shuffle byte_cnt to add up stats. Do bswap16 for all. */
 599         const vector unsigned char len_shuf_mask = (vector unsigned char){
 600                  1,  0,  5,  4,
 601                  9,  8, 13, 12,
 602                 -1, -1, -1, -1,
 603                 -1, -1, -1, -1};
 604 #endif
 605         /* Mask to shuffle from extracted CQE to mbuf. */
 606         const vector unsigned char shuf_mask = (vector unsigned char){
 607                  5,  4,           /* bswap16, pkt_len */
 608                 -1, -1,           /* zero out 2nd half of pkt_len */
 609                  5,  4,           /* bswap16, data_len */
 610                 11, 10,           /* bswap16, vlan+tci */
 611                 15, 14, 13, 12,   /* bswap32, rss */
 612                  1,  2,  3, -1};  /* fdir.hi */
 613         /* Mask to blend from the last Qword to the first DQword. */
 614         /* Mask to blend from the last Qword to the first DQword. */
 615         const vector unsigned char blend_mask = (vector unsigned char){
 616                 -1,  0,  0,  0,
 617                  0,  0,  0,  0,
 618                 -1, -1, -1, -1,
 619                 -1, -1, -1, -1};
 620         const vector unsigned char crc_adj =
 621                 (vector unsigned char)(vector unsigned short){
 622                 rxq->crc_present * RTE_ETHER_CRC_LEN, 0,
 623                 rxq->crc_present * RTE_ETHER_CRC_LEN, 0, 0, 0, 0, 0};
 624         const vector unsigned char flow_mark_adj =
 625                 (vector unsigned char)(vector unsigned int){
 626                 0, 0, 0, rxq->mark * (-1)};
 627         const vector unsigned short cqe_sel_mask1 =
 628                 (vector unsigned short){0, 0, 0, 0, 0xffff, 0xffff, 0, 0};
 629         const vector unsigned short cqe_sel_mask2 =
 630                 (vector unsigned short){0, 0, 0xffff, 0, 0, 0, 0, 0};
 631
 632         MLX5_ASSERT(rxq->sges_n == 0);
 633         MLX5_ASSERT(rxq->cqe_n == rxq->elts_n);
 634         cq = &(*rxq->cqes)[cq_idx];
 635         rte_prefetch0(cq);
 636         rte_prefetch0(cq + 1);
 637         rte_prefetch0(cq + 2);
 638         rte_prefetch0(cq + 3);
 639         pkts_n = RTE_MIN(pkts_n, MLX5_VPMD_RX_MAX_BURST);
 640
 641         repl_n = q_n - (rxq->rq_ci - rxq->rq_pi);
 642         if (repl_n >= rxq->rq_repl_thresh)
 643                 mlx5_rx_replenish_bulk_mbuf(rxq, repl_n);
 644         /* See if there're unreturned mbufs from compressed CQE. */
 645         rcvd_pkt = rxq->decompressed;
 646         if (rcvd_pkt > 0) {
 647                 rcvd_pkt = RTE_MIN(rcvd_pkt, pkts_n);
 648                 rxq_copy_mbuf_v(rxq, pkts, rcvd_pkt);
 649                 rxq->rq_pi += rcvd_pkt;
 650                 rxq->decompressed -= rcvd_pkt;
 651                 pkts += rcvd_pkt;
 652         }
 653         elts_idx = rxq->rq_pi & q_mask;
 654         elts = &(*rxq->elts)[elts_idx];
 655         /* Not to overflow pkts array. */
 656         pkts_n = RTE_ALIGN_FLOOR(pkts_n - rcvd_pkt, MLX5_VPMD_DESCS_PER_LOOP);
 657         /* Not to cross queue end. */
 658         pkts_n = RTE_MIN(pkts_n, q_n - elts_idx);
 659         pkts_n = RTE_MIN(pkts_n, q_n - cq_idx);
 660         if (!pkts_n)
 661                 return rcvd_pkt;
 662         /* At this point, there shouldn't be any remaining packets. */
 663         MLX5_ASSERT(rxq->decompressed == 0);
 664
 665         /*
 666          * A. load first Qword (8bytes) in one loop.
 667          * B. copy 4 mbuf pointers from elts ring to returing pkts.
 668          * C. load remaining CQE data and extract necessary fields.
 669          *    Final 16bytes cqes[] extracted from original 64bytes CQE has the
 670          *    following structure:
 671          *        struct {
 672          *          uint8_t  pkt_info;
 673          *          uint8_t  flow_tag[3];
 674          *          uint16_t byte_cnt;
 675          *          uint8_t  rsvd4;
 676          *          uint8_t  op_own;
 677          *          uint16_t hdr_type_etc;
 678          *          uint16_t vlan_info;
 679          *          uint32_t rx_has_res;
 680          *        } c;
 681          * D. fill in mbuf.
 682          * E. get valid CQEs.
 683          * F. find compressed CQE.
 684          */
 685         for (pos = 0;
 686              pos < pkts_n;
 687              pos += MLX5_VPMD_DESCS_PER_LOOP) {
 688                 vector unsigned char cqes[MLX5_VPMD_DESCS_PER_LOOP];
 689                 vector unsigned char cqe_tmp1, cqe_tmp2;
 690                 vector unsigned char pkt_mb0, pkt_mb1, pkt_mb2, pkt_mb3;
 691                 vector unsigned char op_own, op_own_tmp1, op_own_tmp2;
 692                 vector unsigned char opcode, owner_mask, invalid_mask;
 693                 vector unsigned char comp_mask;
 694                 vector unsigned char mask;
 695 #ifdef MLX5_PMD_SOFT_COUNTERS
 696                 const vector unsigned char lower_half = {
 697                         0, 1, 4, 5, 8, 9, 12, 13,
 698                         16, 17, 20, 21, 24, 25, 28, 29};
 699                 const vector unsigned char upper_half = {
 700                         2, 3, 6, 7, 10, 11, 14, 15,
 701                         18, 19, 22, 23, 26, 27, 30, 31};
 702                 const vector unsigned long shmax = {64, 64};
 703                 vector unsigned char byte_cnt;
 704                 vector unsigned short left, right;
 705                 vector unsigned long lshift;
 706                 vector __attribute__((altivec(bool__)))
 707                         unsigned long shmask;
 708 #endif
 709                 vector unsigned char mbp1, mbp2;
 710                 vector unsigned char p =
 711                         (vector unsigned char)(vector unsigned short){
 712                                 0, 1, 2, 3, 0, 0, 0, 0};
 713                 unsigned int p1, p2, p3;
 714
 715                 /* Prefetch next 4 CQEs. */
 716                 if (pkts_n - pos >= 2 * MLX5_VPMD_DESCS_PER_LOOP) {
 717                         rte_prefetch0(&cq[pos + MLX5_VPMD_DESCS_PER_LOOP]);
 718                         rte_prefetch0(&cq[pos + MLX5_VPMD_DESCS_PER_LOOP + 1]);
 719                         rte_prefetch0(&cq[pos + MLX5_VPMD_DESCS_PER_LOOP + 2]);
 720                         rte_prefetch0(&cq[pos + MLX5_VPMD_DESCS_PER_LOOP + 3]);
 721                 }
 722
 723                 /* A.0 do not cross the end of CQ. */
 724                 mask = (vector unsigned char)(vector unsigned long){
 725                         (pkts_n - pos) * sizeof(uint16_t) * 8, 0};
 726
 727                 {
 728                         vector unsigned long lshift;
 729                         vector __attribute__((altivec(bool__)))
 730                                 unsigned long shmask;
 731                         const vector unsigned long shmax = {64, 64};
 732
 733                         lshift = vec_splat((vector unsigned long)mask, 0);
 734                         shmask = vec_cmpgt(shmax, lshift);
 735                         mask = (vector unsigned char)
 736                                 vec_sl((vector unsigned long)ones, lshift);
 737                         mask = (vector unsigned char)
 738                                 vec_sel((vector unsigned long)shmask,
 739                                 (vector unsigned long)mask, shmask);
 740                 }
 741
 742                 p = (vector unsigned char)
 743                         vec_andc((vector unsigned long)p,
 744                         (vector unsigned long)mask);
 745
 746                 /* A.1 load cqes. */
 747                 p3 = (unsigned int)((vector unsigned short)p)[3];
 748                 cqes[3] = (vector unsigned char)(vector unsigned long){
 749                         *(__rte_aligned(8) unsigned long *)
 750                         &cq[pos + p3].sop_drop_qpn, 0LL};
 751                 rte_compiler_barrier();
 752
 753                 p2 = (unsigned int)((vector unsigned short)p)[2];
 754                 cqes[2] = (vector unsigned char)(vector unsigned long){
 755                         *(__rte_aligned(8) unsigned long *)
 756                         &cq[pos + p2].sop_drop_qpn, 0LL};
 757                 rte_compiler_barrier();
 758
 759                 /* B.1 load mbuf pointers. */
 760                 mbp1 = (vector unsigned char)vec_vsx_ld(0,
 761                         (signed int const *)&elts[pos]);
 762                 mbp2 = (vector unsigned char)vec_vsx_ld(0,
 763                         (signed int const *)&elts[pos + 2]);
 764
 765                 /* A.1 load a block having op_own. */
 766                 p1 = (unsigned int)((vector unsigned short)p)[1];
 767                 cqes[1] = (vector unsigned char)(vector unsigned long){
 768                         *(__rte_aligned(8) unsigned long *)
 769                         &cq[pos + p1].sop_drop_qpn, 0LL};
 770                 rte_compiler_barrier();
 771
 772                 cqes[0] = (vector unsigned char)(vector unsigned long){
 773                         *(__rte_aligned(8) unsigned long *)
 774                         &cq[pos].sop_drop_qpn, 0LL};
 775                 rte_compiler_barrier();
 776
 777                 /* B.2 copy mbuf pointers. */
 778                 *(vector unsigned char *)&pkts[pos] = mbp1;
 779                 *(vector unsigned char *)&pkts[pos + 2] = mbp2;
 780                 rte_cio_rmb();
 781
 782                 /* C.1 load remaining CQE data and extract necessary fields. */
 783                 cqe_tmp2 = *(vector unsigned char *)
 784                         &cq[pos + p3].pkt_info;
 785                 cqe_tmp1 = *(vector unsigned char *)
 786                         &cq[pos + p2].pkt_info;
 787                 cqes[3] = vec_sel(cqes[3], cqe_tmp2, blend_mask);
 788                 cqes[2] = vec_sel(cqes[2], cqe_tmp1, blend_mask);
 789                 cqe_tmp2 = (vector unsigned char)vec_vsx_ld(0,
 790                         (signed int const *)&cq[pos + p3].csum);
 791                 cqe_tmp1 = (vector unsigned char)vec_vsx_ld(0,
 792                         (signed int const *)&cq[pos + p2].csum);
 793                 cqes[3] = (vector unsigned char)
 794                         vec_sel((vector unsigned short)cqes[3],
 795                         (vector unsigned short)cqe_tmp2, cqe_sel_mask1);
 796                 cqes[2] = (vector unsigned char)
 797                         vec_sel((vector unsigned short)cqes[2],
 798                         (vector unsigned short)cqe_tmp1, cqe_sel_mask1);
 799                 cqe_tmp2 = (vector unsigned char)(vector unsigned long){
 800                         *(__rte_aligned(8) unsigned long *)
 801                         &cq[pos + p3].rsvd3[9], 0LL};
 802                 cqe_tmp1 = (vector unsigned char)(vector unsigned long){
 803                         *(__rte_aligned(8) unsigned long *)
 804                         &cq[pos + p2].rsvd3[9], 0LL};
 805                 cqes[3] = (vector unsigned char)
 806                         vec_sel((vector unsigned short)cqes[3],
 807                         (vector unsigned short)cqe_tmp2,
 808                         (vector unsigned short)cqe_sel_mask2);
 809                 cqes[2] = (vector unsigned char)
 810                         vec_sel((vector unsigned short)cqes[2],
 811                         (vector unsigned short)cqe_tmp1,
 812                         (vector unsigned short)cqe_sel_mask2);
 813
 814                 /* C.2 generate final structure for mbuf with swapping bytes. */
 815                 pkt_mb3 = vec_perm(cqes[3], zero, shuf_mask);
 816                 pkt_mb2 = vec_perm(cqes[2], zero, shuf_mask);
 817
 818                 /* C.3 adjust CRC length. */
 819                 pkt_mb3 = (vector unsigned char)
 820                         ((vector unsigned short)pkt_mb3 -
 821                         (vector unsigned short)crc_adj);
 822                 pkt_mb2 = (vector unsigned char)
 823                         ((vector unsigned short)pkt_mb2 -
 824                         (vector unsigned short)crc_adj);
 825
 826                 /* C.4 adjust flow mark. */
 827                 pkt_mb3 = (vector unsigned char)
 828                         ((vector unsigned int)pkt_mb3 +
 829                         (vector unsigned int)flow_mark_adj);
 830                 pkt_mb2 = (vector unsigned char)
 831                         ((vector unsigned int)pkt_mb2 +
 832                         (vector unsigned int)flow_mark_adj);
 833
 834                 /* D.1 fill in mbuf - rx_descriptor_fields1. */
 835                 *(vector unsigned char *)
 836                         &pkts[pos + 3]->pkt_len = pkt_mb3;
 837                 *(vector unsigned char *)
 838                         &pkts[pos + 2]->pkt_len = pkt_mb2;
 839
 840                 /* E.1 extract op_own field. */
 841                 op_own_tmp2 = (vector unsigned char)
 842                         vec_mergeh((vector unsigned int)cqes[2],
 843                         (vector unsigned int)cqes[3]);
 844
 845                 /* C.1 load remaining CQE data and extract necessary fields. */
 846                 cqe_tmp2 = *(vector unsigned char *)
 847                         &cq[pos + p1].pkt_info;
 848                 cqe_tmp1 = *(vector unsigned char *)
 849                         &cq[pos].pkt_info;
 850                 cqes[1] = vec_sel(cqes[1], cqe_tmp2, blend_mask);
 851                 cqes[0] = vec_sel(cqes[0], cqe_tmp2, blend_mask);
 852                 cqe_tmp2 = (vector unsigned char)vec_vsx_ld(0,
 853                         (signed int const *)&cq[pos + p1].csum);
 854                 cqe_tmp1 = (vector unsigned char)vec_vsx_ld(0,
 855                         (signed int const *)&cq[pos].csum);
 856                 cqes[1] = (vector unsigned char)
 857                         vec_sel((vector unsigned short)cqes[1],
 858                         (vector unsigned short)cqe_tmp2, cqe_sel_mask1);
 859                 cqes[0] = (vector unsigned char)
 860                         vec_sel((vector unsigned short)cqes[0],
 861                         (vector unsigned short)cqe_tmp1, cqe_sel_mask1);
 862                 cqe_tmp2 = (vector unsigned char)(vector unsigned long){
 863                         *(__rte_aligned(8) unsigned long *)
 864                         &cq[pos + p1].rsvd3[9], 0LL};
 865                 cqe_tmp1 = (vector unsigned char)(vector unsigned long){
 866                         *(__rte_aligned(8) unsigned long *)
 867                         &cq[pos].rsvd3[9], 0LL};
 868                 cqes[1] = (vector unsigned char)
 869                         vec_sel((vector unsigned short)cqes[1],
 870                         (vector unsigned short)cqe_tmp2, cqe_sel_mask2);
 871                 cqes[0] = (vector unsigned char)
 872                         vec_sel((vector unsigned short)cqes[0],
 873                         (vector unsigned short)cqe_tmp1, cqe_sel_mask2);
 874
 875                 /* C.2 generate final structure for mbuf with swapping bytes. */
 876                 pkt_mb1 = vec_perm(cqes[1], zero, shuf_mask);
 877                 pkt_mb0 = vec_perm(cqes[0], zero, shuf_mask);
 878
 879                 /* C.3 adjust CRC length. */
 880                 pkt_mb1 = (vector unsigned char)
 881                         ((vector unsigned short)pkt_mb1 -
 882                         (vector unsigned short)crc_adj);
 883                 pkt_mb0 = (vector unsigned char)
 884                         ((vector unsigned short)pkt_mb0 -
 885                         (vector unsigned short)crc_adj);
 886
 887                 /* C.4 adjust flow mark. */
 888                 pkt_mb1 = (vector unsigned char)
 889                         ((vector unsigned int)pkt_mb1 +
 890                         (vector unsigned int)flow_mark_adj);
 891                 pkt_mb0 = (vector unsigned char)
 892                         ((vector unsigned int)pkt_mb0 +
 893                         (vector unsigned int)flow_mark_adj);
 894
 895                 /* E.1 extract op_own byte. */
 896                 op_own_tmp1 = (vector unsigned char)
 897                         vec_mergeh((vector unsigned int)cqes[0],
 898                         (vector unsigned int)cqes[1]);
 899                 op_own = (vector unsigned char)
 900                         vec_mergel((vector unsigned long)op_own_tmp1,
 901                         (vector unsigned long)op_own_tmp2);
 902
 903                 /* D.1 fill in mbuf - rx_descriptor_fields1. */
 904                 *(vector unsigned char *)
 905                         &pkts[pos + 1]->pkt_len = pkt_mb1;
 906                 *(vector unsigned char *)
 907                         &pkts[pos]->pkt_len = pkt_mb0;
 908
 909                 /* E.2 flip owner bit to mark CQEs from last round. */
 910                 owner_mask = (vector unsigned char)
 911                         vec_and((vector unsigned long)op_own,
 912                         (vector unsigned long)owner_check);
 913                 if (ownership)
 914                         owner_mask = (vector unsigned char)
 915                                 vec_xor((vector unsigned long)owner_mask,
 916                                 (vector unsigned long)owner_check);
 917                 owner_mask = (vector unsigned char)
 918                         vec_cmpeq((vector unsigned int)owner_mask,
 919                         (vector unsigned int)owner_check);
 920                 owner_mask = (vector unsigned char)
 921                         vec_packs((vector unsigned int)owner_mask,
 922                         (vector unsigned int)zero);
 923
 924                 /* E.3 get mask for invalidated CQEs. */
 925                 opcode = (vector unsigned char)
 926                         vec_and((vector unsigned long)op_own,
 927                         (vector unsigned long)opcode_check);
 928                 invalid_mask = (vector unsigned char)
 929                         vec_cmpeq((vector unsigned int)opcode_check,
 930                         (vector unsigned int)opcode);
 931                 invalid_mask = (vector unsigned char)
 932                         vec_packs((vector unsigned int)invalid_mask,
 933                         (vector unsigned int)zero);
 934
 935                 /* E.4 mask out beyond boundary. */
 936                 invalid_mask = (vector unsigned char)
 937                         vec_or((vector unsigned long)invalid_mask,
 938                         (vector unsigned long)mask);
 939
 940                 /* E.5 merge invalid_mask with invalid owner. */
 941                 invalid_mask = (vector unsigned char)
 942                         vec_or((vector unsigned long)invalid_mask,
 943                         (vector unsigned long)owner_mask);
 944
 945                 /* F.1 find compressed CQE format. */
 946                 comp_mask = (vector unsigned char)
 947                         vec_and((vector unsigned long)op_own,
 948                         (vector unsigned long)format_check);
 949                 comp_mask = (vector unsigned char)
 950                         vec_cmpeq((vector unsigned int)comp_mask,
 951                         (vector unsigned int)format_check);
 952                 comp_mask = (vector unsigned char)
 953                         vec_packs((vector unsigned int)comp_mask,
 954                         (vector unsigned int)zero);
 955
 956                 /* F.2 mask out invalid entries. */
 957                 comp_mask = (vector unsigned char)
 958                         vec_andc((vector unsigned long)comp_mask,
 959                         (vector unsigned long)invalid_mask);
 960                 comp_idx = ((vector unsigned long)comp_mask)[0];
 961
 962                 /* F.3 get the first compressed CQE. */
 963                 comp_idx = comp_idx ? __builtin_ctzll(comp_idx) /
 964                         (sizeof(uint16_t) * 8) : MLX5_VPMD_DESCS_PER_LOOP;
 965
 966                 /* E.6 mask out entries after the compressed CQE. */
 967                 mask = (vector unsigned char)(vector unsigned long){
 968                         (comp_idx * sizeof(uint16_t) * 8), 0};
 969                 lshift = vec_splat((vector unsigned long)mask, 0);
 970                 shmask = vec_cmpgt(shmax, lshift);
 971                 mask = (vector unsigned char)
 972                         vec_sl((vector unsigned long)ones, lshift);
 973                 mask = (vector unsigned char)
 974                         vec_sel((vector unsigned long)shmask,
 975                         (vector unsigned long)mask, shmask);
 976                 invalid_mask = (vector unsigned char)
 977                         vec_or((vector unsigned long)invalid_mask,
 978                         (vector unsigned long)mask);
 979
 980                 /* E.7 count non-compressed valid CQEs. */
 981                 n = ((vector unsigned long)invalid_mask)[0];
 982                 n = n ? __builtin_ctzll(n) / (sizeof(uint16_t) * 8) :
 983                         MLX5_VPMD_DESCS_PER_LOOP;
 984                 nocmp_n += n;
 985
 986                 /* D.2 get the final invalid mask. */
 987                 mask = (vector unsigned char)(vector unsigned long){
 988                         (n * sizeof(uint16_t) * 8), 0};
 989                 lshift = vec_splat((vector unsigned long)mask, 0);
 990                 shmask = vec_cmpgt(shmax, lshift);
 991                 mask = (vector unsigned char)
 992                         vec_sl((vector unsigned long)ones, lshift);
 993                 mask = (vector unsigned char)
 994                         vec_sel((vector unsigned long)shmask,
 995                         (vector unsigned long)mask, shmask);
 996                 invalid_mask = (vector unsigned char)
 997                         vec_or((vector unsigned long)invalid_mask,
 998                         (vector unsigned long)mask);
 999
1000                 /* D.3 check error in opcode. */
1001                 opcode = (vector unsigned char)
1002                         vec_cmpeq((vector unsigned int)resp_err_check,
1003                         (vector unsigned int)opcode);
1004                 opcode = (vector unsigned char)
1005                         vec_packs((vector unsigned int)opcode,
1006                         (vector unsigned int)zero);
1007                 opcode = (vector unsigned char)
1008                         vec_andc((vector unsigned long)opcode,
1009                         (vector unsigned long)invalid_mask);
1010
1011                 /* D.4 mark if any error is set */
1012                 *err |= ((vector unsigned long)opcode)[0];
1013
1014                 /* D.5 fill in mbuf - rearm_data and packet_type. */
1015                 rxq_cq_to_ptype_oflags_v(rxq, cqes, opcode, &pkts[pos]);
1016                 if (rxq->hw_timestamp) {
1017                         pkts[pos]->timestamp =
1018                                 rte_be_to_cpu_64(cq[pos].timestamp);
1019                         pkts[pos + 1]->timestamp =
1020                                 rte_be_to_cpu_64(cq[pos + p1].timestamp);
1021                         pkts[pos + 2]->timestamp =
1022                                 rte_be_to_cpu_64(cq[pos + p2].timestamp);
1023                         pkts[pos + 3]->timestamp =
1024                                 rte_be_to_cpu_64(cq[pos + p3].timestamp);
1025                 }
1026                 if (rte_flow_dynf_metadata_avail()) {
1027                         uint64_t flag = rte_flow_dynf_metadata_mask;
1028                         int offs = rte_flow_dynf_metadata_offs;
1029                         uint32_t metadata;
1030
1031                         /* This code is subject for futher optimization. */
1032                         metadata = cq[pos].flow_table_metadata;
1033                         *RTE_MBUF_DYNFIELD(pkts[pos], offs, uint32_t *) =
1034                                                                 metadata;
1035                         pkts[pos]->ol_flags |= metadata ? flag : 0ULL;
1036                         metadata = cq[pos + 1].flow_table_metadata;
1037                         *RTE_MBUF_DYNFIELD(pkts[pos + 1], offs, uint32_t *) =
1038                                                                 metadata;
1039                         pkts[pos + 1]->ol_flags |= metadata ? flag : 0ULL;
1040                         metadata = cq[pos + 2].flow_table_metadata;
1041                         *RTE_MBUF_DYNFIELD(pkts[pos + 2], offs, uint32_t *) =
1042                                                                 metadata;
1043                         pkts[pos + 2]->ol_flags |= metadata ? flag : 0ULL;
1044                         metadata = cq[pos + 3].flow_table_metadata;
1045                         *RTE_MBUF_DYNFIELD(pkts[pos + 3], offs, uint32_t *) =
1046                                                                 metadata;
1047                         pkts[pos + 3]->ol_flags |= metadata ? flag : 0ULL;
1048                 }
1049 #ifdef MLX5_PMD_SOFT_COUNTERS
1050                 /* Add up received bytes count. */
1051                 byte_cnt = vec_perm(op_own, zero, len_shuf_mask);
1052                 byte_cnt = (vector unsigned char)
1053                         vec_andc((vector unsigned long)byte_cnt,
1054                         (vector unsigned long)invalid_mask);
1055                 left = vec_perm((vector unsigned short)byte_cnt,
1056                         (vector unsigned short)zero, lower_half);
1057                 right = vec_perm((vector unsigned short)byte_cnt,
1058                         (vector unsigned short)zero, upper_half);
1059                 byte_cnt = (vector unsigned char)vec_add(left, right);
1060                 left = vec_perm((vector unsigned short)byte_cnt,
1061                         (vector unsigned short)zero, lower_half);
1062                 right = vec_perm((vector unsigned short)byte_cnt,
1063                         (vector unsigned short)zero, upper_half);
1064                 byte_cnt = (vector unsigned char)vec_add(left, right);
1065                 rcvd_byte += ((vector unsigned long)byte_cnt)[0];
1066 #endif
1067
1068                 /*
1069                  * Break the loop unless more valid CQE is expected, or if
1070                  * there's a compressed CQE.
1071                  */
1072                 if (n != MLX5_VPMD_DESCS_PER_LOOP)
1073                         break;
1074         }
1075         /* If no new CQE seen, return without updating cq_db. */
1076         if (unlikely(!nocmp_n && comp_idx == MLX5_VPMD_DESCS_PER_LOOP))
1077                 return rcvd_pkt;
1078         /* Update the consumer indexes for non-compressed CQEs. */
1079         MLX5_ASSERT(nocmp_n <= pkts_n);
1080         rxq->cq_ci += nocmp_n;
1081         rxq->rq_pi += nocmp_n;
1082         rcvd_pkt += nocmp_n;
1083 #ifdef MLX5_PMD_SOFT_COUNTERS
1084         rxq->stats.ipackets += nocmp_n;
1085         rxq->stats.ibytes += rcvd_byte;
1086 #endif
1087         /* Decompress the last CQE if compressed. */
1088         if (comp_idx < MLX5_VPMD_DESCS_PER_LOOP && comp_idx == n) {
1089                 MLX5_ASSERT(comp_idx == (nocmp_n % MLX5_VPMD_DESCS_PER_LOOP));
1090                 rxq->decompressed =
1091                         rxq_cq_decompress_v(rxq, &cq[nocmp_n], &elts[nocmp_n]);
1092                 /* Return more packets if needed. */
1093                 if (nocmp_n < pkts_n) {
1094                         uint16_t n = rxq->decompressed;
1095
1096                         n = RTE_MIN(n, pkts_n - nocmp_n);
1097                         rxq_copy_mbuf_v(rxq, &pkts[nocmp_n], n);
1098                         rxq->rq_pi += n;
1099                         rcvd_pkt += n;
1100                         rxq->decompressed -= n;
1101                 }
1102         }
1103         rte_compiler_barrier();
1104         *rxq->cq_db = rte_cpu_to_be_32(rxq->cq_ci);
1105         return rcvd_pkt;
1106 }
1107
1108 #endif /* RTE_PMD_MLX5_RXTX_VEC_ALTIVEC_H_ */