drivers/net/i40e/i40e_rxtx_vec_common.h

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2010-2015 Intel Corporation
   3  */
   4
   5 #ifndef _I40E_RXTX_VEC_COMMON_H_
   6 #define _I40E_RXTX_VEC_COMMON_H_
   7 #include <stdint.h>
   8 #include <ethdev_driver.h>
   9 #include <rte_malloc.h>
  10
  11 #include "i40e_ethdev.h"
  12 #include "i40e_rxtx.h"
  13
  14 #ifndef __INTEL_COMPILER
  15 #pragma GCC diagnostic ignored "-Wcast-qual"
  16 #endif
  17
  18 static inline uint16_t
  19 reassemble_packets(struct i40e_rx_queue *rxq, struct rte_mbuf **rx_bufs,
  20                    uint16_t nb_bufs, uint8_t *split_flags)
  21 {
  22         struct rte_mbuf *pkts[RTE_I40E_VPMD_RX_BURST]; /*finished pkts*/
  23         struct rte_mbuf *start = rxq->pkt_first_seg;
  24         struct rte_mbuf *end =  rxq->pkt_last_seg;
  25         unsigned pkt_idx, buf_idx;
  26
  27         for (buf_idx = 0, pkt_idx = 0; buf_idx < nb_bufs; buf_idx++) {
  28                 if (end != NULL) {
  29                         /* processing a split packet */
  30                         end->next = rx_bufs[buf_idx];
  31                         rx_bufs[buf_idx]->data_len += rxq->crc_len;
  32
  33                         start->nb_segs++;
  34                         start->pkt_len += rx_bufs[buf_idx]->data_len;
  35                         end = end->next;
  36
  37                         if (!split_flags[buf_idx]) {
  38                                 /* it's the last packet of the set */
  39                                 start->hash = end->hash;
  40                                 start->vlan_tci = end->vlan_tci;
  41                                 start->ol_flags = end->ol_flags;
  42                                 /* we need to strip crc for the whole packet */
  43                                 start->pkt_len -= rxq->crc_len;
  44                                 if (end->data_len > rxq->crc_len)
  45                                         end->data_len -= rxq->crc_len;
  46                                 else {
  47                                         /* free up last mbuf */
  48                                         struct rte_mbuf *secondlast = start;
  49
  50                                         start->nb_segs--;
  51                                         while (secondlast->next != end)
  52                                                 secondlast = secondlast->next;
  53                                         secondlast->data_len -= (rxq->crc_len -
  54                                                         end->data_len);
  55                                         secondlast->next = NULL;
  56                                         rte_pktmbuf_free_seg(end);
  57                                 }
  58                                 pkts[pkt_idx++] = start;
  59                                 start = end = NULL;
  60                         }
  61                 } else {
  62                         /* not processing a split packet */
  63                         if (!split_flags[buf_idx]) {
  64                                 /* not a split packet, save and skip */
  65                                 pkts[pkt_idx++] = rx_bufs[buf_idx];
  66                                 continue;
  67                         }
  68                         end = start = rx_bufs[buf_idx];
  69                         rx_bufs[buf_idx]->data_len += rxq->crc_len;
  70                         rx_bufs[buf_idx]->pkt_len += rxq->crc_len;
  71                 }
  72         }
  73
  74         /* save the partial packet for next time */
  75         rxq->pkt_first_seg = start;
  76         rxq->pkt_last_seg = end;
  77         memcpy(rx_bufs, pkts, pkt_idx * (sizeof(*pkts)));
  78         return pkt_idx;
  79 }
  80
  81 static __rte_always_inline int
  82 i40e_tx_free_bufs(struct i40e_tx_queue *txq)
  83 {
  84         struct i40e_tx_entry *txep;
  85         uint32_t n;
  86         uint32_t i;
  87         int nb_free = 0;
  88         struct rte_mbuf *m, *free[RTE_I40E_TX_MAX_FREE_BUF_SZ];
  89
  90         /* check DD bits on threshold descriptor */
  91         if ((txq->tx_ring[txq->tx_next_dd].cmd_type_offset_bsz &
  92                         rte_cpu_to_le_64(I40E_TXD_QW1_DTYPE_MASK)) !=
  93                         rte_cpu_to_le_64(I40E_TX_DESC_DTYPE_DESC_DONE))
  94                 return 0;
  95
  96         n = txq->tx_rs_thresh;
  97
  98          /* first buffer to free from S/W ring is at index
  99           * tx_next_dd - (tx_rs_thresh-1)
 100           */
 101         txep = &txq->sw_ring[txq->tx_next_dd - (n - 1)];
 102         m = rte_pktmbuf_prefree_seg(txep[0].mbuf);
 103         if (likely(m != NULL)) {
 104                 free[0] = m;
 105                 nb_free = 1;
 106                 for (i = 1; i < n; i++) {
 107                         m = rte_pktmbuf_prefree_seg(txep[i].mbuf);
 108                         if (likely(m != NULL)) {
 109                                 if (likely(m->pool == free[0]->pool)) {
 110                                         free[nb_free++] = m;
 111                                 } else {
 112                                         rte_mempool_put_bulk(free[0]->pool,
 113                                                              (void *)free,
 114                                                              nb_free);
 115                                         free[0] = m;
 116                                         nb_free = 1;
 117                                 }
 118                         }
 119                 }
 120                 rte_mempool_put_bulk(free[0]->pool, (void **)free, nb_free);
 121         } else {
 122                 for (i = 1; i < n; i++) {
 123                         m = rte_pktmbuf_prefree_seg(txep[i].mbuf);
 124                         if (m != NULL)
 125                                 rte_mempool_put(m->pool, m);
 126                 }
 127         }
 128
 129         /* buffers were freed, update counters */
 130         txq->nb_tx_free = (uint16_t)(txq->nb_tx_free + txq->tx_rs_thresh);
 131         txq->tx_next_dd = (uint16_t)(txq->tx_next_dd + txq->tx_rs_thresh);
 132         if (txq->tx_next_dd >= txq->nb_tx_desc)
 133                 txq->tx_next_dd = (uint16_t)(txq->tx_rs_thresh - 1);
 134
 135         return txq->tx_rs_thresh;
 136 }
 137
 138 static __rte_always_inline void
 139 tx_backlog_entry(struct i40e_tx_entry *txep,
 140                  struct rte_mbuf **tx_pkts, uint16_t nb_pkts)
 141 {
 142         int i;
 143
 144         for (i = 0; i < (int)nb_pkts; ++i)
 145                 txep[i].mbuf = tx_pkts[i];
 146 }
 147
 148 static inline void
 149 _i40e_rx_queue_release_mbufs_vec(struct i40e_rx_queue *rxq)
 150 {
 151         const unsigned mask = rxq->nb_rx_desc - 1;
 152         unsigned i;
 153
 154         if (rxq->sw_ring == NULL || rxq->rxrearm_nb >= rxq->nb_rx_desc)
 155                 return;
 156
 157         /* free all mbufs that are valid in the ring */
 158         if (rxq->rxrearm_nb == 0) {
 159                 for (i = 0; i < rxq->nb_rx_desc; i++) {
 160                         if (rxq->sw_ring[i].mbuf != NULL)
 161                                 rte_pktmbuf_free_seg(rxq->sw_ring[i].mbuf);
 162                 }
 163         } else {
 164                 for (i = rxq->rx_tail;
 165                      i != rxq->rxrearm_start;
 166                      i = (i + 1) & mask) {
 167                         if (rxq->sw_ring[i].mbuf != NULL)
 168                                 rte_pktmbuf_free_seg(rxq->sw_ring[i].mbuf);
 169                 }
 170         }
 171
 172         rxq->rxrearm_nb = rxq->nb_rx_desc;
 173
 174         /* set all entries to NULL */
 175         memset(rxq->sw_ring, 0, sizeof(rxq->sw_ring[0]) * rxq->nb_rx_desc);
 176 }
 177
 178 static inline int
 179 i40e_rxq_vec_setup_default(struct i40e_rx_queue *rxq)
 180 {
 181         uintptr_t p;
 182         struct rte_mbuf mb_def = { .buf_addr = 0 }; /* zeroed mbuf */
 183
 184         mb_def.nb_segs = 1;
 185         mb_def.data_off = RTE_PKTMBUF_HEADROOM;
 186         mb_def.port = rxq->port_id;
 187         rte_mbuf_refcnt_set(&mb_def, 1);
 188
 189         /* prevent compiler reordering: rearm_data covers previous fields */
 190         rte_compiler_barrier();
 191         p = (uintptr_t)&mb_def.rearm_data;
 192         rxq->mbuf_initializer = *(uint64_t *)p;
 193         return 0;
 194 }
 195
 196 static inline int
 197 i40e_rx_vec_dev_conf_condition_check_default(struct rte_eth_dev *dev)
 198 {
 199 #ifndef RTE_LIBRTE_IEEE1588
 200         struct i40e_adapter *ad =
 201                 I40E_DEV_PRIVATE_TO_ADAPTER(dev->data->dev_private);
 202         struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
 203         struct rte_fdir_conf *fconf = &dev->data->dev_conf.fdir_conf;
 204         struct i40e_rx_queue *rxq;
 205         uint16_t desc, i;
 206         bool first_queue;
 207
 208         /* no fdir support */
 209         if (fconf->mode != RTE_FDIR_MODE_NONE)
 210                 return -1;
 211
 212          /* no header split support */
 213         if (rxmode->offloads & DEV_RX_OFFLOAD_HEADER_SPLIT)
 214                 return -1;
 215
 216         /* no QinQ support */
 217         if (rxmode->offloads & DEV_RX_OFFLOAD_VLAN_EXTEND)
 218                 return -1;
 219
 220         /**
 221          * Vector mode is allowed only when number of Rx queue
 222          * descriptor is power of 2.
 223          */
 224         if (!dev->data->dev_started) {
 225                 first_queue = true;
 226                 for (i = 0; i < dev->data->nb_rx_queues; i++) {
 227                         rxq = dev->data->rx_queues[i];
 228                         if (!rxq)
 229                                 continue;
 230                         desc = rxq->nb_rx_desc;
 231                         if (first_queue)
 232                                 ad->rx_vec_allowed =
 233                                         rte_is_power_of_2(desc);
 234                         else
 235                                 ad->rx_vec_allowed =
 236                                         ad->rx_vec_allowed ?
 237                                         rte_is_power_of_2(desc) :
 238                                         ad->rx_vec_allowed;
 239                         first_queue = false;
 240                 }
 241         } else {
 242                 /* Only check the first queue's descriptor number */
 243                 for (i = 0; i < dev->data->nb_rx_queues; i++) {
 244                         rxq = dev->data->rx_queues[i];
 245                         if (!rxq)
 246                                 continue;
 247                         desc = rxq->nb_rx_desc;
 248                         ad->rx_vec_allowed = rte_is_power_of_2(desc);
 249                         break;
 250                 }
 251         }
 252
 253         return 0;
 254 #else
 255         RTE_SET_USED(dev);
 256         return -1;
 257 #endif
 258 }
 259
 260 #ifdef CC_AVX2_SUPPORT
 261 static __rte_always_inline void
 262 i40e_rxq_rearm_common(struct i40e_rx_queue *rxq, __rte_unused bool avx512)
 263 {
 264         int i;
 265         uint16_t rx_id;
 266         volatile union i40e_rx_desc *rxdp;
 267         struct i40e_rx_entry *rxep = &rxq->sw_ring[rxq->rxrearm_start];
 268
 269         rxdp = rxq->rx_ring + rxq->rxrearm_start;
 270
 271         /* Pull 'n' more MBUFs into the software ring */
 272         if (rte_mempool_get_bulk(rxq->mp,
 273                                  (void *)rxep,
 274                                  RTE_I40E_RXQ_REARM_THRESH) < 0) {
 275                 if (rxq->rxrearm_nb + RTE_I40E_RXQ_REARM_THRESH >=
 276                     rxq->nb_rx_desc) {
 277                         __m128i dma_addr0;
 278                         dma_addr0 = _mm_setzero_si128();
 279                         for (i = 0; i < RTE_I40E_DESCS_PER_LOOP; i++) {
 280                                 rxep[i].mbuf = &rxq->fake_mbuf;
 281                                 _mm_store_si128((__m128i *)&rxdp[i].read,
 282                                                 dma_addr0);
 283                         }
 284                 }
 285                 rte_eth_devices[rxq->port_id].data->rx_mbuf_alloc_failed +=
 286                         RTE_I40E_RXQ_REARM_THRESH;
 287                 return;
 288         }
 289
 290 #ifndef RTE_LIBRTE_I40E_16BYTE_RX_DESC
 291         struct rte_mbuf *mb0, *mb1;
 292         __m128i dma_addr0, dma_addr1;
 293         __m128i hdr_room = _mm_set_epi64x(RTE_PKTMBUF_HEADROOM,
 294                         RTE_PKTMBUF_HEADROOM);
 295         /* Initialize the mbufs in vector, process 2 mbufs in one loop */
 296         for (i = 0; i < RTE_I40E_RXQ_REARM_THRESH; i += 2, rxep += 2) {
 297                 __m128i vaddr0, vaddr1;
 298
 299                 mb0 = rxep[0].mbuf;
 300                 mb1 = rxep[1].mbuf;
 301
 302                 /* load buf_addr(lo 64bit) and buf_iova(hi 64bit) */
 303                 RTE_BUILD_BUG_ON(offsetof(struct rte_mbuf, buf_iova) !=
 304                                 offsetof(struct rte_mbuf, buf_addr) + 8);
 305                 vaddr0 = _mm_loadu_si128((__m128i *)&mb0->buf_addr);
 306                 vaddr1 = _mm_loadu_si128((__m128i *)&mb1->buf_addr);
 307
 308                 /* convert pa to dma_addr hdr/data */
 309                 dma_addr0 = _mm_unpackhi_epi64(vaddr0, vaddr0);
 310                 dma_addr1 = _mm_unpackhi_epi64(vaddr1, vaddr1);
 311
 312                 /* add headroom to pa values */
 313                 dma_addr0 = _mm_add_epi64(dma_addr0, hdr_room);
 314                 dma_addr1 = _mm_add_epi64(dma_addr1, hdr_room);
 315
 316                 /* flush desc with pa dma_addr */
 317                 _mm_store_si128((__m128i *)&rxdp++->read, dma_addr0);
 318                 _mm_store_si128((__m128i *)&rxdp++->read, dma_addr1);
 319         }
 320 #else
 321 #ifdef CC_AVX512_SUPPORT
 322         if (avx512) {
 323                 struct rte_mbuf *mb0, *mb1, *mb2, *mb3;
 324                 struct rte_mbuf *mb4, *mb5, *mb6, *mb7;
 325                 __m512i dma_addr0_3, dma_addr4_7;
 326                 __m512i hdr_room = _mm512_set1_epi64(RTE_PKTMBUF_HEADROOM);
 327                 /* Initialize the mbufs in vector, process 8 mbufs in one loop */
 328                 for (i = 0; i < RTE_I40E_RXQ_REARM_THRESH;
 329                                 i += 8, rxep += 8, rxdp += 8) {
 330                         __m128i vaddr0, vaddr1, vaddr2, vaddr3;
 331                         __m128i vaddr4, vaddr5, vaddr6, vaddr7;
 332                         __m256i vaddr0_1, vaddr2_3;
 333                         __m256i vaddr4_5, vaddr6_7;
 334                         __m512i vaddr0_3, vaddr4_7;
 335
 336                         mb0 = rxep[0].mbuf;
 337                         mb1 = rxep[1].mbuf;
 338                         mb2 = rxep[2].mbuf;
 339                         mb3 = rxep[3].mbuf;
 340                         mb4 = rxep[4].mbuf;
 341                         mb5 = rxep[5].mbuf;
 342                         mb6 = rxep[6].mbuf;
 343                         mb7 = rxep[7].mbuf;
 344
 345                         /* load buf_addr(lo 64bit) and buf_iova(hi 64bit) */
 346                         RTE_BUILD_BUG_ON(offsetof(struct rte_mbuf, buf_iova) !=
 347                                         offsetof(struct rte_mbuf, buf_addr) + 8);
 348                         vaddr0 = _mm_loadu_si128((__m128i *)&mb0->buf_addr);
 349                         vaddr1 = _mm_loadu_si128((__m128i *)&mb1->buf_addr);
 350                         vaddr2 = _mm_loadu_si128((__m128i *)&mb2->buf_addr);
 351                         vaddr3 = _mm_loadu_si128((__m128i *)&mb3->buf_addr);
 352                         vaddr4 = _mm_loadu_si128((__m128i *)&mb4->buf_addr);
 353                         vaddr5 = _mm_loadu_si128((__m128i *)&mb5->buf_addr);
 354                         vaddr6 = _mm_loadu_si128((__m128i *)&mb6->buf_addr);
 355                         vaddr7 = _mm_loadu_si128((__m128i *)&mb7->buf_addr);
 356
 357                         /**
 358                          * merge 0 & 1, by casting 0 to 256-bit and inserting 1
 359                          * into the high lanes. Similarly for 2 & 3, and so on.
 360                          */
 361                         vaddr0_1 =
 362                                 _mm256_inserti128_si256(_mm256_castsi128_si256(vaddr0),
 363                                                         vaddr1, 1);
 364                         vaddr2_3 =
 365                                 _mm256_inserti128_si256(_mm256_castsi128_si256(vaddr2),
 366                                                         vaddr3, 1);
 367                         vaddr4_5 =
 368                                 _mm256_inserti128_si256(_mm256_castsi128_si256(vaddr4),
 369                                                         vaddr5, 1);
 370                         vaddr6_7 =
 371                                 _mm256_inserti128_si256(_mm256_castsi128_si256(vaddr6),
 372                                                         vaddr7, 1);
 373                         vaddr0_3 =
 374                                 _mm512_inserti64x4(_mm512_castsi256_si512(vaddr0_1),
 375                                                         vaddr2_3, 1);
 376                         vaddr4_7 =
 377                                 _mm512_inserti64x4(_mm512_castsi256_si512(vaddr4_5),
 378                                                         vaddr6_7, 1);
 379
 380                         /* convert pa to dma_addr hdr/data */
 381                         dma_addr0_3 = _mm512_unpackhi_epi64(vaddr0_3, vaddr0_3);
 382                         dma_addr4_7 = _mm512_unpackhi_epi64(vaddr4_7, vaddr4_7);
 383
 384                         /* add headroom to pa values */
 385                         dma_addr0_3 = _mm512_add_epi64(dma_addr0_3, hdr_room);
 386                         dma_addr4_7 = _mm512_add_epi64(dma_addr4_7, hdr_room);
 387
 388                         /* flush desc with pa dma_addr */
 389                         _mm512_store_si512((__m512i *)&rxdp->read, dma_addr0_3);
 390                         _mm512_store_si512((__m512i *)&(rxdp + 4)->read, dma_addr4_7);
 391                 }
 392         } else
 393 #endif
 394         {
 395                 struct rte_mbuf *mb0, *mb1, *mb2, *mb3;
 396                 __m256i dma_addr0_1, dma_addr2_3;
 397                 __m256i hdr_room = _mm256_set1_epi64x(RTE_PKTMBUF_HEADROOM);
 398                 /* Initialize the mbufs in vector, process 4 mbufs in one loop */
 399                 for (i = 0; i < RTE_I40E_RXQ_REARM_THRESH;
 400                                 i += 4, rxep += 4, rxdp += 4) {
 401                         __m128i vaddr0, vaddr1, vaddr2, vaddr3;
 402                         __m256i vaddr0_1, vaddr2_3;
 403
 404                         mb0 = rxep[0].mbuf;
 405                         mb1 = rxep[1].mbuf;
 406                         mb2 = rxep[2].mbuf;
 407                         mb3 = rxep[3].mbuf;
 408
 409                         /* load buf_addr(lo 64bit) and buf_iova(hi 64bit) */
 410                         RTE_BUILD_BUG_ON(offsetof(struct rte_mbuf, buf_iova) !=
 411                                         offsetof(struct rte_mbuf, buf_addr) + 8);
 412                         vaddr0 = _mm_loadu_si128((__m128i *)&mb0->buf_addr);
 413                         vaddr1 = _mm_loadu_si128((__m128i *)&mb1->buf_addr);
 414                         vaddr2 = _mm_loadu_si128((__m128i *)&mb2->buf_addr);
 415                         vaddr3 = _mm_loadu_si128((__m128i *)&mb3->buf_addr);
 416
 417                         /*
 418                          * merge 0 & 1, by casting 0 to 256-bit and inserting 1
 419                          * into the high lanes. Similarly for 2 & 3
 420                          */
 421                         vaddr0_1 = _mm256_inserti128_si256(
 422                                         _mm256_castsi128_si256(vaddr0), vaddr1, 1);
 423                         vaddr2_3 = _mm256_inserti128_si256(
 424                                         _mm256_castsi128_si256(vaddr2), vaddr3, 1);
 425
 426                         /* convert pa to dma_addr hdr/data */
 427                         dma_addr0_1 = _mm256_unpackhi_epi64(vaddr0_1, vaddr0_1);
 428                         dma_addr2_3 = _mm256_unpackhi_epi64(vaddr2_3, vaddr2_3);
 429
 430                         /* add headroom to pa values */
 431                         dma_addr0_1 = _mm256_add_epi64(dma_addr0_1, hdr_room);
 432                         dma_addr2_3 = _mm256_add_epi64(dma_addr2_3, hdr_room);
 433
 434                         /* flush desc with pa dma_addr */
 435                         _mm256_store_si256((__m256i *)&rxdp->read, dma_addr0_1);
 436                         _mm256_store_si256((__m256i *)&(rxdp + 2)->read, dma_addr2_3);
 437                 }
 438         }
 439
 440 #endif
 441
 442         rxq->rxrearm_start += RTE_I40E_RXQ_REARM_THRESH;
 443         if (rxq->rxrearm_start >= rxq->nb_rx_desc)
 444                 rxq->rxrearm_start = 0;
 445
 446         rxq->rxrearm_nb -= RTE_I40E_RXQ_REARM_THRESH;
 447
 448         rx_id = (uint16_t)((rxq->rxrearm_start == 0) ?
 449                              (rxq->nb_rx_desc - 1) : (rxq->rxrearm_start - 1));
 450
 451         /* Update the tail pointer on the NIC */
 452         I40E_PCI_REG_WC_WRITE(rxq->qrx_tail, rx_id);
 453 }
 454 #endif
 455
 456 #endif