drivers/net/bnxt/bnxt_rxtx_vec_avx2.c

   1 /* SPDX-License-Identifier: BSD-3-Clause */
   2 /* Copyright(c) 2019-2021 Broadcom All rights reserved. */
   3
   4 #include <inttypes.h>
   5 #include <stdbool.h>
   6
   7 #include <rte_bitmap.h>
   8 #include <rte_byteorder.h>
   9 #include <rte_malloc.h>
  10 #include <rte_memory.h>
  11 #include <rte_vect.h>
  12
  13 #include "bnxt.h"
  14 #include "bnxt_cpr.h"
  15 #include "bnxt_ring.h"
  16
  17 #include "bnxt_txq.h"
  18 #include "bnxt_txr.h"
  19 #include "bnxt_rxtx_vec_common.h"
  20 #include <unistd.h>
  21
  22 static uint16_t
  23 recv_burst_vec_avx2(void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t nb_pkts)
  24 {
  25         struct bnxt_rx_queue *rxq = rx_queue;
  26         const __m256i mbuf_init =
  27                 _mm256_set_epi64x(0, 0, 0, rxq->mbuf_initializer);
  28         struct bnxt_cp_ring_info *cpr = rxq->cp_ring;
  29         struct bnxt_rx_ring_info *rxr = rxq->rx_ring;
  30         uint16_t cp_ring_size = cpr->cp_ring_struct->ring_size;
  31         uint16_t rx_ring_size = rxr->rx_ring_struct->ring_size;
  32         struct cmpl_base *cp_desc_ring = cpr->cp_desc_ring;
  33         uint64_t valid, desc_valid_mask = ~0ULL;
  34         const __m256i info3_v_mask = _mm256_set1_epi32(CMPL_BASE_V);
  35         uint32_t raw_cons = cpr->cp_raw_cons;
  36         uint32_t cons, mbcons;
  37         int nb_rx_pkts = 0;
  38         int i;
  39         const __m256i valid_target =
  40                 _mm256_set1_epi32(!!(raw_cons & cp_ring_size));
  41         const __m256i dsc_shuf_msk =
  42                 _mm256_set_epi8(0xff, 0xff, 0xff, 0xff,  /* Zeroes. */
  43                                 7, 6,                    /* metadata type */
  44                                 9, 8,                    /* flags2 low 16 */
  45                                 5, 4,                    /* vlan_tci */
  46                                 1, 0,                    /* errors_v2 */
  47                                 0xff, 0xff, 0xff, 0xff,  /* Zeroes. */
  48                                 0xff, 0xff, 0xff, 0xff,  /* Zeroes. */
  49                                 7, 6,                    /* metadata type */
  50                                 9, 8,                    /* flags2 low 16 */
  51                                 5, 4,                    /* vlan_tci */
  52                                 1, 0,                    /* errors_v2 */
  53                                 0xff, 0xff, 0xff, 0xff); /* Zeroes. */
  54         const __m256i shuf_msk =
  55                 _mm256_set_epi8(15, 14, 13, 12,          /* rss */
  56                                 7, 6,                    /* vlan_tci */
  57                                 3, 2,                    /* data_len */
  58                                 0xFF, 0xFF, 3, 2,        /* pkt_len */
  59                                 0xFF, 0xFF, 0xFF, 0xFF,  /* pkt_type (zeroes) */
  60                                 15, 14, 13, 12,          /* rss */
  61                                 7, 6,                    /* vlan_tci */
  62                                 3, 2,                    /* data_len */
  63                                 0xFF, 0xFF, 3, 2,        /* pkt_len */
  64                                 0xFF, 0xFF, 0xFF, 0xFF); /* pkt_type (zeroes) */
  65         const __m256i flags_type_mask =
  66                 _mm256_set1_epi32(RX_PKT_CMPL_FLAGS_ITYPE_MASK);
  67         const __m256i flags2_mask1 =
  68                 _mm256_set1_epi32(CMPL_FLAGS2_VLAN_TUN_MSK);
  69         const __m256i flags2_mask2 =
  70                 _mm256_set1_epi32(RX_PKT_CMPL_FLAGS2_IP_TYPE);
  71         const __m256i rss_mask =
  72                 _mm256_set1_epi32(RX_PKT_CMPL_FLAGS_RSS_VALID);
  73         __m256i t0, t1, flags_type, flags2, index, errors;
  74         __m256i ptype_idx, ptypes, is_tunnel;
  75         __m256i mbuf01, mbuf23, mbuf45, mbuf67;
  76         __m256i rearm0, rearm1, rearm2, rearm3, rearm4, rearm5, rearm6, rearm7;
  77         __m256i ol_flags, ol_flags_hi;
  78         __m256i rss_flags;
  79
  80         /* Validate ptype table indexing at build time. */
  81         bnxt_check_ptype_constants();
  82
  83         /* If Rx Q was stopped return */
  84         if (unlikely(!rxq->rx_started))
  85                 return 0;
  86
  87         if (rxq->rxrearm_nb >= rxq->rx_free_thresh)
  88                 bnxt_rxq_rearm(rxq, rxr);
  89
  90         nb_pkts = RTE_ALIGN_FLOOR(nb_pkts, BNXT_RX_DESCS_PER_LOOP_VEC256);
  91
  92         cons = raw_cons & (cp_ring_size - 1);
  93         mbcons = (raw_cons / 2) & (rx_ring_size - 1);
  94
  95         /* Return immediately if there is not at least one completed packet. */
  96         if (!bnxt_cpr_cmp_valid(&cp_desc_ring[cons], raw_cons, cp_ring_size))
  97                 return 0;
  98
  99         /* Ensure that we do not go past the ends of the rings. */
 100         nb_pkts = RTE_MIN(nb_pkts, RTE_MIN(rx_ring_size - mbcons,
 101                                            (cp_ring_size - cons) / 2));
 102         /*
 103          * If we are at the end of the ring, ensure that descriptors after the
 104          * last valid entry are not treated as valid. Otherwise, force the
 105          * maximum number of packets to receive to be a multiple of the per-
 106          * loop count.
 107          */
 108         if (nb_pkts < BNXT_RX_DESCS_PER_LOOP_VEC256) {
 109                 desc_valid_mask >>=
 110                         CHAR_BIT * (BNXT_RX_DESCS_PER_LOOP_VEC256 - nb_pkts);
 111         } else {
 112                 nb_pkts =
 113                         RTE_ALIGN_FLOOR(nb_pkts, BNXT_RX_DESCS_PER_LOOP_VEC256);
 114         }
 115
 116         /* Handle RX burst request */
 117         for (i = 0; i < nb_pkts; i += BNXT_RX_DESCS_PER_LOOP_VEC256,
 118                                   cons += BNXT_RX_DESCS_PER_LOOP_VEC256 * 2,
 119                                   mbcons += BNXT_RX_DESCS_PER_LOOP_VEC256) {
 120                 __m256i desc0, desc1, desc2, desc3, desc4, desc5, desc6, desc7;
 121                 __m256i rxcmp0_1, rxcmp2_3, rxcmp4_5, rxcmp6_7, info3_v;
 122                 __m256i errors_v2;
 123                 uint32_t num_valid;
 124
 125                 /* Copy eight mbuf pointers to output array. */
 126                 t0 = _mm256_loadu_si256((void *)&rxr->rx_buf_ring[mbcons]);
 127                 _mm256_storeu_si256((void *)&rx_pkts[i], t0);
 128 #ifdef RTE_ARCH_X86_64
 129                 t0 = _mm256_loadu_si256((void *)&rxr->rx_buf_ring[mbcons + 4]);
 130                 _mm256_storeu_si256((void *)&rx_pkts[i + 4], t0);
 131 #endif
 132
 133                 /*
 134                  * Load eight receive completion descriptors into 256-bit
 135                  * registers. Loads are issued in reverse order in order to
 136                  * ensure consistent state.
 137                  */
 138                 desc7 = _mm256_load_si256((void *)&cp_desc_ring[cons + 14]);
 139                 rte_compiler_barrier();
 140                 desc6 = _mm256_load_si256((void *)&cp_desc_ring[cons + 12]);
 141                 rte_compiler_barrier();
 142                 desc5 = _mm256_load_si256((void *)&cp_desc_ring[cons + 10]);
 143                 rte_compiler_barrier();
 144                 desc4 = _mm256_load_si256((void *)&cp_desc_ring[cons + 8]);
 145                 rte_compiler_barrier();
 146                 desc3 = _mm256_load_si256((void *)&cp_desc_ring[cons + 6]);
 147                 rte_compiler_barrier();
 148                 desc2 = _mm256_load_si256((void *)&cp_desc_ring[cons + 4]);
 149                 rte_compiler_barrier();
 150                 desc1 = _mm256_load_si256((void *)&cp_desc_ring[cons + 2]);
 151                 rte_compiler_barrier();
 152                 desc0 = _mm256_load_si256((void *)&cp_desc_ring[cons + 0]);
 153
 154                 /*
 155                  * Pack needed fields from each descriptor into a compressed
 156                  * 128-bit layout and pair two compressed descriptors into
 157                  * 256-bit registers. The 128-bit compressed layout is as
 158                  * follows:
 159                  *     Bits  0-15: flags_type field from low completion record.
 160                  *     Bits 16-31: len field  from low completion record.
 161                  *     Bits 32-47: flags2 (low 16 bits) from high completion.
 162                  *     Bits 48-79: metadata from high completion record.
 163                  *     Bits 80-95: errors_v2 from high completion record.
 164                  *     Bits 96-127: rss hash from low completion record.
 165                  */
 166                 t0 = _mm256_permute2f128_si256(desc6, desc7, 0x20);
 167                 t1 = _mm256_permute2f128_si256(desc6, desc7, 0x31);
 168                 t1 = _mm256_shuffle_epi8(t1, dsc_shuf_msk);
 169                 rxcmp6_7 = _mm256_blend_epi32(t0, t1, 0x66);
 170
 171                 t0 = _mm256_permute2f128_si256(desc4, desc5, 0x20);
 172                 t1 = _mm256_permute2f128_si256(desc4, desc5, 0x31);
 173                 t1 = _mm256_shuffle_epi8(t1, dsc_shuf_msk);
 174                 rxcmp4_5 = _mm256_blend_epi32(t0, t1, 0x66);
 175
 176                 t0 = _mm256_permute2f128_si256(desc2, desc3, 0x20);
 177                 t1 = _mm256_permute2f128_si256(desc2, desc3, 0x31);
 178                 t1 = _mm256_shuffle_epi8(t1, dsc_shuf_msk);
 179                 rxcmp2_3 = _mm256_blend_epi32(t0, t1, 0x66);
 180
 181                 t0 = _mm256_permute2f128_si256(desc0, desc1, 0x20);
 182                 t1 = _mm256_permute2f128_si256(desc0, desc1, 0x31);
 183                 t1 = _mm256_shuffle_epi8(t1, dsc_shuf_msk);
 184                 rxcmp0_1 = _mm256_blend_epi32(t0, t1, 0x66);
 185
 186                 /* Compute packet type table indices for eight packets. */
 187                 t0 = _mm256_unpacklo_epi32(rxcmp0_1, rxcmp2_3);
 188                 t1 = _mm256_unpacklo_epi32(rxcmp4_5, rxcmp6_7);
 189                 flags_type = _mm256_unpacklo_epi64(t0, t1);
 190                 ptype_idx = _mm256_and_si256(flags_type, flags_type_mask);
 191                 ptype_idx = _mm256_srli_epi32(ptype_idx,
 192                                               RX_PKT_CMPL_FLAGS_ITYPE_SFT -
 193                                               BNXT_PTYPE_TBL_TYPE_SFT);
 194
 195                 t0 = _mm256_unpacklo_epi32(rxcmp0_1, rxcmp2_3);
 196                 t1 = _mm256_unpacklo_epi32(rxcmp4_5, rxcmp6_7);
 197                 flags2 = _mm256_unpackhi_epi64(t0, t1);
 198
 199                 t0 = _mm256_srli_epi32(_mm256_and_si256(flags2, flags2_mask1),
 200                                        RX_PKT_CMPL_FLAGS2_META_FORMAT_SFT -
 201                                        BNXT_PTYPE_TBL_VLAN_SFT);
 202                 ptype_idx = _mm256_or_si256(ptype_idx, t0);
 203
 204                 t0 = _mm256_srli_epi32(_mm256_and_si256(flags2, flags2_mask2),
 205                                        RX_PKT_CMPL_FLAGS2_IP_TYPE_SFT -
 206                                        BNXT_PTYPE_TBL_IP_VER_SFT);
 207                 ptype_idx = _mm256_or_si256(ptype_idx, t0);
 208
 209                 /*
 210                  * Load ptypes for eight packets using gather. Gather operations
 211                  * have extremely high latency (~19 cycles), execution and use
 212                  * of result should be separated as much as possible.
 213                  */
 214                 ptypes = _mm256_i32gather_epi32((int *)bnxt_ptype_table,
 215                                                 ptype_idx, sizeof(uint32_t));
 216                 /*
 217                  * Compute ol_flags and checksum error table indices for eight
 218                  * packets.
 219                  */
 220                 is_tunnel = _mm256_and_si256(flags2, _mm256_set1_epi32(4));
 221                 is_tunnel = _mm256_slli_epi32(is_tunnel, 3);
 222                 flags2 = _mm256_and_si256(flags2, _mm256_set1_epi32(0x1F));
 223
 224                 /* Extract errors_v2 fields for eight packets. */
 225                 t0 = _mm256_unpackhi_epi32(rxcmp0_1, rxcmp2_3);
 226                 t1 = _mm256_unpackhi_epi32(rxcmp4_5, rxcmp6_7);
 227                 errors_v2 = _mm256_unpacklo_epi64(t0, t1);
 228
 229                 errors = _mm256_srli_epi32(errors_v2, 4);
 230                 errors = _mm256_and_si256(errors, _mm256_set1_epi32(0xF));
 231                 errors = _mm256_and_si256(errors, flags2);
 232
 233                 index = _mm256_andnot_si256(errors, flags2);
 234                 errors = _mm256_or_si256(errors,
 235                                          _mm256_srli_epi32(is_tunnel, 1));
 236                 index = _mm256_or_si256(index, is_tunnel);
 237
 238                 /*
 239                  * Load ol_flags for eight packets using gather. Gather
 240                  * operations have extremely high latency (~19 cycles),
 241                  * execution and use of result should be separated as much
 242                  * as possible.
 243                  */
 244                 ol_flags = _mm256_i32gather_epi32((int *)rxr->ol_flags_table,
 245                                                   index, sizeof(uint32_t));
 246                 errors = _mm256_i32gather_epi32((int *)rxr->ol_flags_err_table,
 247                                                 errors, sizeof(uint32_t));
 248
 249                 /*
 250                  * Pack the 128-bit array of valid descriptor flags into 64
 251                  * bits and count the number of set bits in order to determine
 252                  * the number of valid descriptors.
 253                  */
 254                 const __m256i perm_msk =
 255                                 _mm256_set_epi32(7, 3, 6, 2, 5, 1, 4, 0);
 256                 info3_v = _mm256_permutevar8x32_epi32(errors_v2, perm_msk);
 257                 info3_v = _mm256_and_si256(errors_v2, info3_v_mask);
 258                 info3_v = _mm256_xor_si256(info3_v, valid_target);
 259
 260                 info3_v = _mm256_packs_epi32(info3_v, _mm256_setzero_si256());
 261                 valid = _mm_cvtsi128_si64(_mm256_extracti128_si256(info3_v, 1));
 262                 valid = (valid << CHAR_BIT) |
 263                         _mm_cvtsi128_si64(_mm256_castsi256_si128(info3_v));
 264                 num_valid = __builtin_popcountll(valid & desc_valid_mask);
 265
 266                 if (num_valid == 0)
 267                         break;
 268
 269                 /* Update mbuf rearm_data for eight packets. */
 270                 mbuf01 = _mm256_shuffle_epi8(rxcmp0_1, shuf_msk);
 271                 mbuf23 = _mm256_shuffle_epi8(rxcmp2_3, shuf_msk);
 272                 mbuf45 = _mm256_shuffle_epi8(rxcmp4_5, shuf_msk);
 273                 mbuf67 = _mm256_shuffle_epi8(rxcmp6_7, shuf_msk);
 274
 275                 /* Blend in ptype field for two mbufs at a time. */
 276                 mbuf01 = _mm256_blend_epi32(mbuf01, ptypes, 0x11);
 277                 mbuf23 = _mm256_blend_epi32(mbuf23,
 278                                         _mm256_srli_si256(ptypes, 4), 0x11);
 279                 mbuf45 = _mm256_blend_epi32(mbuf45,
 280                                         _mm256_srli_si256(ptypes, 8), 0x11);
 281                 mbuf67 = _mm256_blend_epi32(mbuf67,
 282                                         _mm256_srli_si256(ptypes, 12), 0x11);
 283
 284                 /* Unpack rearm data, set fixed fields for first four mbufs. */
 285                 rearm0 = _mm256_permute2f128_si256(mbuf_init, mbuf01, 0x20);
 286                 rearm1 = _mm256_blend_epi32(mbuf_init, mbuf01, 0xF0);
 287                 rearm2 = _mm256_permute2f128_si256(mbuf_init, mbuf23, 0x20);
 288                 rearm3 = _mm256_blend_epi32(mbuf_init, mbuf23, 0xF0);
 289
 290                 /* Compute final ol_flags values for eight packets. */
 291                 rss_flags = _mm256_and_si256(flags_type, rss_mask);
 292                 rss_flags = _mm256_srli_epi32(rss_flags, 9);
 293                 ol_flags = _mm256_or_si256(ol_flags, errors);
 294                 ol_flags = _mm256_or_si256(ol_flags, rss_flags);
 295                 ol_flags_hi = _mm256_permute2f128_si256(ol_flags,
 296                                                         ol_flags, 0x11);
 297
 298                 /* Set ol_flags fields for first four packets. */
 299                 rearm0 = _mm256_blend_epi32(rearm0,
 300                                             _mm256_slli_si256(ol_flags, 8),
 301                                             0x04);
 302                 rearm1 = _mm256_blend_epi32(rearm1,
 303                                             _mm256_slli_si256(ol_flags_hi, 8),
 304                                             0x04);
 305                 rearm2 = _mm256_blend_epi32(rearm2,
 306                                             _mm256_slli_si256(ol_flags, 4),
 307                                             0x04);
 308                 rearm3 = _mm256_blend_epi32(rearm3,
 309                                             _mm256_slli_si256(ol_flags_hi, 4),
 310                                             0x04);
 311
 312                 /* Store all mbuf fields for first four packets. */
 313                 _mm256_storeu_si256((void *)&rx_pkts[i + 0]->rearm_data,
 314                                     rearm0);
 315                 _mm256_storeu_si256((void *)&rx_pkts[i + 1]->rearm_data,
 316                                     rearm1);
 317                 _mm256_storeu_si256((void *)&rx_pkts[i + 2]->rearm_data,
 318                                     rearm2);
 319                 _mm256_storeu_si256((void *)&rx_pkts[i + 3]->rearm_data,
 320                                     rearm3);
 321
 322                 /* Unpack rearm data, set fixed fields for final four mbufs. */
 323                 rearm4 = _mm256_permute2f128_si256(mbuf_init, mbuf45, 0x20);
 324                 rearm5 = _mm256_blend_epi32(mbuf_init, mbuf45, 0xF0);
 325                 rearm6 = _mm256_permute2f128_si256(mbuf_init, mbuf67, 0x20);
 326                 rearm7 = _mm256_blend_epi32(mbuf_init, mbuf67, 0xF0);
 327
 328                 /* Set ol_flags fields for final four packets. */
 329                 rearm4 = _mm256_blend_epi32(rearm4, ol_flags, 0x04);
 330                 rearm5 = _mm256_blend_epi32(rearm5, ol_flags_hi, 0x04);
 331                 rearm6 = _mm256_blend_epi32(rearm6,
 332                                             _mm256_srli_si256(ol_flags, 4),
 333                                             0x04);
 334                 rearm7 = _mm256_blend_epi32(rearm7,
 335                                             _mm256_srli_si256(ol_flags_hi, 4),
 336                                             0x04);
 337
 338                 /* Store all mbuf fields for final four packets. */
 339                 _mm256_storeu_si256((void *)&rx_pkts[i + 4]->rearm_data,
 340                                     rearm4);
 341                 _mm256_storeu_si256((void *)&rx_pkts[i + 5]->rearm_data,
 342                                     rearm5);
 343                 _mm256_storeu_si256((void *)&rx_pkts[i + 6]->rearm_data,
 344                                     rearm6);
 345                 _mm256_storeu_si256((void *)&rx_pkts[i + 7]->rearm_data,
 346                                     rearm7);
 347
 348                 nb_rx_pkts += num_valid;
 349                 if (num_valid < BNXT_RX_DESCS_PER_LOOP_VEC256)
 350                         break;
 351         }
 352
 353         if (nb_rx_pkts) {
 354                 rxr->rx_raw_prod = RING_ADV(rxr->rx_raw_prod, nb_rx_pkts);
 355
 356                 rxq->rxrearm_nb += nb_rx_pkts;
 357                 cpr->cp_raw_cons += 2 * nb_rx_pkts;
 358                 bnxt_db_cq(cpr);
 359         }
 360
 361         return nb_rx_pkts;
 362 }
 363
 364 uint16_t
 365 bnxt_recv_pkts_vec_avx2(void *rx_queue, struct rte_mbuf **rx_pkts,
 366                          uint16_t nb_pkts)
 367 {
 368         uint16_t cnt = 0;
 369
 370         while (nb_pkts > RTE_BNXT_MAX_RX_BURST) {
 371                 uint16_t burst;
 372
 373                 burst = recv_burst_vec_avx2(rx_queue, rx_pkts + cnt,
 374                                              RTE_BNXT_MAX_RX_BURST);
 375
 376                 cnt += burst;
 377                 nb_pkts -= burst;
 378
 379                 if (burst < RTE_BNXT_MAX_RX_BURST)
 380                         return cnt;
 381         }
 382         return cnt + recv_burst_vec_avx2(rx_queue, rx_pkts + cnt, nb_pkts);
 383 }
 384
 385 static void
 386 bnxt_handle_tx_cp_vec(struct bnxt_tx_queue *txq)
 387 {
 388         struct bnxt_cp_ring_info *cpr = txq->cp_ring;
 389         uint32_t raw_cons = cpr->cp_raw_cons;
 390         uint32_t cons;
 391         uint32_t nb_tx_pkts = 0;
 392         struct tx_cmpl *txcmp;
 393         struct cmpl_base *cp_desc_ring = cpr->cp_desc_ring;
 394         struct bnxt_ring *cp_ring_struct = cpr->cp_ring_struct;
 395         uint32_t ring_mask = cp_ring_struct->ring_mask;
 396
 397         do {
 398                 cons = RING_CMPL(ring_mask, raw_cons);
 399                 txcmp = (struct tx_cmpl *)&cp_desc_ring[cons];
 400
 401                 if (!bnxt_cpr_cmp_valid(txcmp, raw_cons, ring_mask + 1))
 402                         break;
 403
 404                 nb_tx_pkts += txcmp->opaque;
 405                 raw_cons = NEXT_RAW_CMP(raw_cons);
 406         } while (nb_tx_pkts < ring_mask);
 407
 408         if (nb_tx_pkts) {
 409                 if (txq->offloads & RTE_ETH_TX_OFFLOAD_MBUF_FAST_FREE)
 410                         bnxt_tx_cmp_vec_fast(txq, nb_tx_pkts);
 411                 else
 412                         bnxt_tx_cmp_vec(txq, nb_tx_pkts);
 413                 cpr->cp_raw_cons = raw_cons;
 414                 bnxt_db_cq(cpr);
 415         }
 416 }
 417
 418 static inline void
 419 bnxt_xmit_one(struct rte_mbuf *mbuf, struct tx_bd_long *txbd,
 420               struct rte_mbuf **tx_buf)
 421 {
 422         uint64_t dsc_hi, dsc_lo;
 423         __m128i desc;
 424
 425         *tx_buf = mbuf;
 426
 427         dsc_hi = mbuf->buf_iova + mbuf->data_off;
 428         dsc_lo = (mbuf->data_len << 16) |
 429                  bnxt_xmit_flags_len(mbuf->data_len, TX_BD_FLAGS_NOCMPL);
 430
 431         desc = _mm_set_epi64x(dsc_hi, dsc_lo);
 432         _mm_store_si128((void *)txbd, desc);
 433 }
 434
 435 static uint16_t
 436 bnxt_xmit_fixed_burst_vec(struct bnxt_tx_queue *txq, struct rte_mbuf **pkts,
 437                           uint16_t nb_pkts)
 438 {
 439         struct bnxt_tx_ring_info *txr = txq->tx_ring;
 440         uint16_t tx_prod, tx_raw_prod = txr->tx_raw_prod;
 441         struct tx_bd_long *txbd;
 442         struct rte_mbuf **tx_buf;
 443         uint16_t to_send;
 444
 445         tx_prod = RING_IDX(txr->tx_ring_struct, tx_raw_prod);
 446         txbd = &txr->tx_desc_ring[tx_prod];
 447         tx_buf = &txr->tx_buf_ring[tx_prod];
 448
 449         /* Prefetch next transmit buffer descriptors. */
 450         rte_prefetch0(txbd);
 451         rte_prefetch0(txbd + 3);
 452
 453         nb_pkts = RTE_MIN(nb_pkts, bnxt_tx_avail(txq));
 454
 455         if (unlikely(nb_pkts == 0))
 456                 return 0;
 457
 458         /* Handle TX burst request */
 459         to_send = nb_pkts;
 460
 461         /*
 462          * If current descriptor is not on a 32-byte boundary, send one packet
 463          * to align for 32-byte stores.
 464          */
 465         if (tx_prod & 1) {
 466                 bnxt_xmit_one(pkts[0], txbd++, tx_buf++);
 467                 to_send--;
 468                 pkts++;
 469         }
 470
 471         /*
 472          * Send four packets per loop, with a single store for each pair
 473          * of descriptors.
 474          */
 475         while (to_send >= BNXT_TX_DESCS_PER_LOOP) {
 476                 uint64_t dsc0_hi, dsc0_lo, dsc1_hi, dsc1_lo;
 477                 uint64_t dsc2_hi, dsc2_lo, dsc3_hi, dsc3_lo;
 478                 __m256i dsc01, dsc23;
 479
 480                 /* Prefetch next transmit buffer descriptors. */
 481                 rte_prefetch0(txbd + 4);
 482                 rte_prefetch0(txbd + 7);
 483
 484                 /* Copy four mbuf pointers to tx buf ring. */
 485 #ifdef RTE_ARCH_X86_64
 486                 __m256i tmp = _mm256_loadu_si256((void *)pkts);
 487                 _mm256_storeu_si256((void *)tx_buf, tmp);
 488 #else
 489                 __m128i tmp = _mm_loadu_si128((void *)pkts);
 490                 _mm_storeu_si128((void *)tx_buf, tmp);
 491 #endif
 492
 493                 dsc0_hi = tx_buf[0]->buf_iova + tx_buf[0]->data_off;
 494                 dsc0_lo = (tx_buf[0]->data_len << 16) |
 495                           bnxt_xmit_flags_len(tx_buf[0]->data_len,
 496                                               TX_BD_FLAGS_NOCMPL);
 497
 498                 dsc1_hi = tx_buf[1]->buf_iova + tx_buf[1]->data_off;
 499                 dsc1_lo = (tx_buf[1]->data_len << 16) |
 500                           bnxt_xmit_flags_len(tx_buf[1]->data_len,
 501                                               TX_BD_FLAGS_NOCMPL);
 502
 503                 dsc01 = _mm256_set_epi64x(dsc1_hi, dsc1_lo, dsc0_hi, dsc0_lo);
 504
 505                 dsc2_hi = tx_buf[2]->buf_iova + tx_buf[2]->data_off;
 506                 dsc2_lo = (tx_buf[2]->data_len << 16) |
 507                           bnxt_xmit_flags_len(tx_buf[2]->data_len,
 508                                               TX_BD_FLAGS_NOCMPL);
 509
 510                 dsc3_hi = tx_buf[3]->buf_iova + tx_buf[3]->data_off;
 511                 dsc3_lo = (tx_buf[3]->data_len << 16) |
 512                           bnxt_xmit_flags_len(tx_buf[3]->data_len,
 513                                               TX_BD_FLAGS_NOCMPL);
 514
 515                 dsc23 = _mm256_set_epi64x(dsc3_hi, dsc3_lo, dsc2_hi, dsc2_lo);
 516
 517                 _mm256_store_si256((void *)txbd, dsc01);
 518                 _mm256_store_si256((void *)(txbd + 2), dsc23);
 519
 520                 to_send -= BNXT_TX_DESCS_PER_LOOP;
 521                 pkts += BNXT_TX_DESCS_PER_LOOP;
 522                 txbd += BNXT_TX_DESCS_PER_LOOP;
 523                 tx_buf += BNXT_TX_DESCS_PER_LOOP;
 524         }
 525
 526         /* Send any remaining packets, writing each descriptor individually. */
 527         while (to_send) {
 528                 bnxt_xmit_one(pkts[0], txbd++, tx_buf++);
 529                 to_send--;
 530                 pkts++;
 531         }
 532
 533         /* Request a completion for the final packet of the burst. */
 534         txbd[-1].opaque = nb_pkts;
 535         txbd[-1].flags_type &= ~TX_BD_LONG_FLAGS_NO_CMPL;
 536
 537         tx_raw_prod += nb_pkts;
 538         bnxt_db_write(&txr->tx_db, tx_raw_prod);
 539
 540         txr->tx_raw_prod = tx_raw_prod;
 541
 542         return nb_pkts;
 543 }
 544
 545 uint16_t
 546 bnxt_xmit_pkts_vec_avx2(void *tx_queue, struct rte_mbuf **tx_pkts,
 547                         uint16_t nb_pkts)
 548 {
 549         int nb_sent = 0;
 550         struct bnxt_tx_queue *txq = tx_queue;
 551         struct bnxt_tx_ring_info *txr = txq->tx_ring;
 552         uint16_t ring_size = txr->tx_ring_struct->ring_size;
 553
 554         /* Tx queue was stopped; wait for it to be restarted */
 555         if (unlikely(!txq->tx_started)) {
 556                 PMD_DRV_LOG(DEBUG, "Tx q stopped;return\n");
 557                 return 0;
 558         }
 559
 560         /* Handle TX completions */
 561         if (bnxt_tx_bds_in_hw(txq) >= txq->tx_free_thresh)
 562                 bnxt_handle_tx_cp_vec(txq);
 563
 564         while (nb_pkts) {
 565                 uint16_t ret, num;
 566
 567                 /*
 568                  * Ensure that no more than RTE_BNXT_MAX_TX_BURST packets
 569                  * are transmitted before the next completion.
 570                  */
 571                 num = RTE_MIN(nb_pkts, RTE_BNXT_MAX_TX_BURST);
 572
 573                 /*
 574                  * Ensure that a ring wrap does not occur within a call to
 575                  * bnxt_xmit_fixed_burst_vec().
 576                  */
 577                 num = RTE_MIN(num, ring_size -
 578                                    (txr->tx_raw_prod & (ring_size - 1)));
 579                 ret = bnxt_xmit_fixed_burst_vec(txq, &tx_pkts[nb_sent], num);
 580                 nb_sent += ret;
 581                 nb_pkts -= ret;
 582                 if (ret < num)
 583                         break;
 584         }
 585
 586         return nb_sent;
 587 }