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