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