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