drivers/net/fm10k/fm10k_rxtx_vec.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2013-2015 Intel Corporation
   3  */
   4
   5 #include <inttypes.h>
   6
   7 #include <ethdev_driver.h>
   8 #include <rte_common.h>
   9 #include "fm10k.h"
  10 #include "base/fm10k_type.h"
  11
  12 #include <tmmintrin.h>
  13
  14 #ifndef __INTEL_COMPILER
  15 #pragma GCC diagnostic ignored "-Wcast-qual"
  16 #endif
  17
  18 static void
  19 fm10k_reset_tx_queue(struct fm10k_tx_queue *txq);
  20
  21 /* Handling the offload flags (olflags) field takes computation
  22  * time when receiving packets. Therefore we provide a flag to disable
  23  * the processing of the olflags field when they are not needed. This
  24  * gives improved performance, at the cost of losing the offload info
  25  * in the received packet
  26  */
  27 #ifdef RTE_LIBRTE_FM10K_RX_OLFLAGS_ENABLE
  28
  29 /* Vlan present flag shift */
  30 #define VP_SHIFT     (2)
  31 /* L3 type shift */
  32 #define L3TYPE_SHIFT     (4)
  33 /* L4 type shift */
  34 #define L4TYPE_SHIFT     (7)
  35 /* HBO flag shift */
  36 #define HBOFLAG_SHIFT     (10)
  37 /* RXE flag shift */
  38 #define RXEFLAG_SHIFT     (13)
  39 /* IPE/L4E flag shift */
  40 #define L3L4EFLAG_SHIFT     (14)
  41 /* shift PKT_RX_L4_CKSUM_GOOD into one byte by 1 bit */
  42 #define CKSUM_SHIFT     (1)
  43
  44 static inline void
  45 fm10k_desc_to_olflags_v(__m128i descs[4], struct rte_mbuf **rx_pkts)
  46 {
  47         __m128i ptype0, ptype1, vtag0, vtag1, eflag0, eflag1, cksumflag;
  48         union {
  49                 uint16_t e[4];
  50                 uint64_t dword;
  51         } vol;
  52
  53         const __m128i pkttype_msk = _mm_set_epi16(
  54                         0x0000, 0x0000, 0x0000, 0x0000,
  55                         PKT_RX_VLAN | PKT_RX_VLAN_STRIPPED,
  56                         PKT_RX_VLAN | PKT_RX_VLAN_STRIPPED,
  57                         PKT_RX_VLAN | PKT_RX_VLAN_STRIPPED,
  58                         PKT_RX_VLAN | PKT_RX_VLAN_STRIPPED);
  59
  60         /* mask everything except rss type */
  61         const __m128i rsstype_msk = _mm_set_epi16(
  62                         0x0000, 0x0000, 0x0000, 0x0000,
  63                         0x000F, 0x000F, 0x000F, 0x000F);
  64
  65         /* mask for HBO and RXE flag flags */
  66         const __m128i rxe_msk = _mm_set_epi16(
  67                         0x0000, 0x0000, 0x0000, 0x0000,
  68                         0x0001, 0x0001, 0x0001, 0x0001);
  69
  70         /* mask the lower byte of ol_flags */
  71         const __m128i ol_flags_msk = _mm_set_epi16(
  72                         0x0000, 0x0000, 0x0000, 0x0000,
  73                         0x00FF, 0x00FF, 0x00FF, 0x00FF);
  74
  75         const __m128i l3l4cksum_flag = _mm_set_epi8(0, 0, 0, 0,
  76                         0, 0, 0, 0,
  77                         0, 0, 0, 0,
  78                         (PKT_RX_IP_CKSUM_BAD | PKT_RX_L4_CKSUM_BAD) >> CKSUM_SHIFT,
  79                         (PKT_RX_IP_CKSUM_BAD | PKT_RX_L4_CKSUM_GOOD) >> CKSUM_SHIFT,
  80                         (PKT_RX_IP_CKSUM_GOOD | PKT_RX_L4_CKSUM_BAD) >> CKSUM_SHIFT,
  81                         (PKT_RX_IP_CKSUM_GOOD | PKT_RX_L4_CKSUM_GOOD) >> CKSUM_SHIFT);
  82
  83         const __m128i rxe_flag = _mm_set_epi8(0, 0, 0, 0,
  84                         0, 0, 0, 0,
  85                         0, 0, 0, 0,
  86                         0, 0, 0, 0);
  87
  88         /* map rss type to rss hash flag */
  89         const __m128i rss_flags = _mm_set_epi8(0, 0, 0, 0,
  90                         0, 0, 0, PKT_RX_RSS_HASH,
  91                         PKT_RX_RSS_HASH, 0, PKT_RX_RSS_HASH, 0,
  92                         PKT_RX_RSS_HASH, PKT_RX_RSS_HASH, PKT_RX_RSS_HASH, 0);
  93
  94         /* Calculate RSS_hash and Vlan fields */
  95         ptype0 = _mm_unpacklo_epi16(descs[0], descs[1]);
  96         ptype1 = _mm_unpacklo_epi16(descs[2], descs[3]);
  97         vtag0 = _mm_unpackhi_epi16(descs[0], descs[1]);
  98         vtag1 = _mm_unpackhi_epi16(descs[2], descs[3]);
  99
 100         ptype0 = _mm_unpacklo_epi32(ptype0, ptype1);
 101         ptype0 = _mm_and_si128(ptype0, rsstype_msk);
 102         ptype0 = _mm_shuffle_epi8(rss_flags, ptype0);
 103
 104         vtag1 = _mm_unpacklo_epi32(vtag0, vtag1);
 105         eflag0 = vtag1;
 106         cksumflag = vtag1;
 107         vtag1 = _mm_srli_epi16(vtag1, VP_SHIFT);
 108         vtag1 = _mm_and_si128(vtag1, pkttype_msk);
 109
 110         vtag1 = _mm_or_si128(ptype0, vtag1);
 111
 112         /* Process err flags, simply set RECIP_ERR bit if HBO/IXE is set */
 113         eflag1 = _mm_srli_epi16(eflag0, RXEFLAG_SHIFT);
 114         eflag0 = _mm_srli_epi16(eflag0, HBOFLAG_SHIFT);
 115         eflag0 = _mm_or_si128(eflag0, eflag1);
 116         eflag0 = _mm_and_si128(eflag0, rxe_msk);
 117         eflag0 = _mm_shuffle_epi8(rxe_flag, eflag0);
 118
 119         vtag1 = _mm_or_si128(eflag0, vtag1);
 120
 121         /* Process L4/L3 checksum error flags */
 122         cksumflag = _mm_srli_epi16(cksumflag, L3L4EFLAG_SHIFT);
 123         cksumflag = _mm_shuffle_epi8(l3l4cksum_flag, cksumflag);
 124
 125         /* clean the higher byte and shift back the flag bits */
 126         cksumflag = _mm_and_si128(cksumflag, ol_flags_msk);
 127         cksumflag = _mm_slli_epi16(cksumflag, CKSUM_SHIFT);
 128         vtag1 = _mm_or_si128(cksumflag, vtag1);
 129
 130         vol.dword = _mm_cvtsi128_si64(vtag1);
 131
 132         rx_pkts[0]->ol_flags = vol.e[0];
 133         rx_pkts[1]->ol_flags = vol.e[1];
 134         rx_pkts[2]->ol_flags = vol.e[2];
 135         rx_pkts[3]->ol_flags = vol.e[3];
 136 }
 137
 138 /* @note: When this function is changed, make corresponding change to
 139  * fm10k_dev_supported_ptypes_get().
 140  */
 141 static inline void
 142 fm10k_desc_to_pktype_v(__m128i descs[4], struct rte_mbuf **rx_pkts)
 143 {
 144         __m128i l3l4type0, l3l4type1, l3type, l4type;
 145         union {
 146                 uint16_t e[4];
 147                 uint64_t dword;
 148         } vol;
 149
 150         /* L3 pkt type mask  Bit4 to Bit6 */
 151         const __m128i l3type_msk = _mm_set_epi16(
 152                         0x0000, 0x0000, 0x0000, 0x0000,
 153                         0x0070, 0x0070, 0x0070, 0x0070);
 154
 155         /* L4 pkt type mask  Bit7 to Bit9 */
 156         const __m128i l4type_msk = _mm_set_epi16(
 157                         0x0000, 0x0000, 0x0000, 0x0000,
 158                         0x0380, 0x0380, 0x0380, 0x0380);
 159
 160         /* convert RRC l3 type to mbuf format */
 161         const __m128i l3type_flags = _mm_set_epi8(0, 0, 0, 0, 0, 0, 0, 0,
 162                         0, 0, 0, RTE_PTYPE_L3_IPV6_EXT,
 163                         RTE_PTYPE_L3_IPV6, RTE_PTYPE_L3_IPV4_EXT,
 164                         RTE_PTYPE_L3_IPV4, 0);
 165
 166         /* Convert RRC l4 type to mbuf format l4type_flags shift-left 8 bits
 167          * to fill into8 bits length.
 168          */
 169         const __m128i l4type_flags = _mm_set_epi8(0, 0, 0, 0, 0, 0, 0, 0, 0,
 170                         RTE_PTYPE_TUNNEL_GENEVE >> 8,
 171                         RTE_PTYPE_TUNNEL_NVGRE >> 8,
 172                         RTE_PTYPE_TUNNEL_VXLAN >> 8,
 173                         RTE_PTYPE_TUNNEL_GRE >> 8,
 174                         RTE_PTYPE_L4_UDP >> 8,
 175                         RTE_PTYPE_L4_TCP >> 8,
 176                         0);
 177
 178         l3l4type0 = _mm_unpacklo_epi16(descs[0], descs[1]);
 179         l3l4type1 = _mm_unpacklo_epi16(descs[2], descs[3]);
 180         l3l4type0 = _mm_unpacklo_epi32(l3l4type0, l3l4type1);
 181
 182         l3type = _mm_and_si128(l3l4type0, l3type_msk);
 183         l4type = _mm_and_si128(l3l4type0, l4type_msk);
 184
 185         l3type = _mm_srli_epi16(l3type, L3TYPE_SHIFT);
 186         l4type = _mm_srli_epi16(l4type, L4TYPE_SHIFT);
 187
 188         l3type = _mm_shuffle_epi8(l3type_flags, l3type);
 189         /* l4type_flags shift-left for 8 bits, need shift-right back */
 190         l4type = _mm_shuffle_epi8(l4type_flags, l4type);
 191
 192         l4type = _mm_slli_epi16(l4type, 8);
 193         l3l4type0 = _mm_or_si128(l3type, l4type);
 194         vol.dword = _mm_cvtsi128_si64(l3l4type0);
 195
 196         rx_pkts[0]->packet_type = vol.e[0];
 197         rx_pkts[1]->packet_type = vol.e[1];
 198         rx_pkts[2]->packet_type = vol.e[2];
 199         rx_pkts[3]->packet_type = vol.e[3];
 200 }
 201 #else
 202 #define fm10k_desc_to_olflags_v(desc, rx_pkts) do {} while (0)
 203 #define fm10k_desc_to_pktype_v(desc, rx_pkts) do {} while (0)
 204 #endif
 205
 206 int __rte_cold
 207 fm10k_rx_vec_condition_check(struct rte_eth_dev *dev)
 208 {
 209 #ifndef RTE_LIBRTE_IEEE1588
 210         struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
 211         struct rte_fdir_conf *fconf = &dev->data->dev_conf.fdir_conf;
 212
 213 #ifndef RTE_FM10K_RX_OLFLAGS_ENABLE
 214         /* whithout rx ol_flags, no VP flag report */
 215         if (rxmode->offloads & DEV_RX_OFFLOAD_VLAN_EXTEND)
 216                 return -1;
 217 #endif
 218
 219         /* no fdir support */
 220         if (fconf->mode != RTE_FDIR_MODE_NONE)
 221                 return -1;
 222
 223         /* no header split support */
 224         if (rxmode->offloads & DEV_RX_OFFLOAD_HEADER_SPLIT)
 225                 return -1;
 226
 227         return 0;
 228 #else
 229         RTE_SET_USED(dev);
 230         return -1;
 231 #endif
 232 }
 233
 234 int __rte_cold
 235 fm10k_rxq_vec_setup(struct fm10k_rx_queue *rxq)
 236 {
 237         uintptr_t p;
 238         struct rte_mbuf mb_def = { .buf_addr = 0 }; /* zeroed mbuf */
 239
 240         mb_def.nb_segs = 1;
 241         /* data_off will be ajusted after new mbuf allocated for 512-byte
 242          * alignment.
 243          */
 244         mb_def.data_off = RTE_PKTMBUF_HEADROOM;
 245         mb_def.port = rxq->port_id;
 246         rte_mbuf_refcnt_set(&mb_def, 1);
 247
 248         /* prevent compiler reordering: rearm_data covers previous fields */
 249         rte_compiler_barrier();
 250         p = (uintptr_t)&mb_def.rearm_data;
 251         rxq->mbuf_initializer = *(uint64_t *)p;
 252         return 0;
 253 }
 254
 255 static inline void
 256 fm10k_rxq_rearm(struct fm10k_rx_queue *rxq)
 257 {
 258         int i;
 259         uint16_t rx_id;
 260         volatile union fm10k_rx_desc *rxdp;
 261         struct rte_mbuf **mb_alloc = &rxq->sw_ring[rxq->rxrearm_start];
 262         struct rte_mbuf *mb0, *mb1;
 263         __m128i head_off = _mm_set_epi64x(
 264                         RTE_PKTMBUF_HEADROOM + FM10K_RX_DATABUF_ALIGN - 1,
 265                         RTE_PKTMBUF_HEADROOM + FM10K_RX_DATABUF_ALIGN - 1);
 266         __m128i dma_addr0, dma_addr1;
 267         /* Rx buffer need to be aligned with 512 byte */
 268         const __m128i hba_msk = _mm_set_epi64x(0,
 269                                 UINT64_MAX - FM10K_RX_DATABUF_ALIGN + 1);
 270
 271         rxdp = rxq->hw_ring + rxq->rxrearm_start;
 272
 273         /* Pull 'n' more MBUFs into the software ring */
 274         if (rte_mempool_get_bulk(rxq->mp,
 275                                  (void *)mb_alloc,
 276                                  RTE_FM10K_RXQ_REARM_THRESH) < 0) {
 277                 dma_addr0 = _mm_setzero_si128();
 278                 /* Clean up all the HW/SW ring content */
 279                 for (i = 0; i < RTE_FM10K_RXQ_REARM_THRESH; i++) {
 280                         mb_alloc[i] = &rxq->fake_mbuf;
 281                         _mm_store_si128((__m128i *)&rxdp[i].q,
 282                                                 dma_addr0);
 283                 }
 284
 285                 rte_eth_devices[rxq->port_id].data->rx_mbuf_alloc_failed +=
 286                         RTE_FM10K_RXQ_REARM_THRESH;
 287                 return;
 288         }
 289
 290         /* Initialize the mbufs in vector, process 2 mbufs in one loop */
 291         for (i = 0; i < RTE_FM10K_RXQ_REARM_THRESH; i += 2, mb_alloc += 2) {
 292                 __m128i vaddr0, vaddr1;
 293                 uintptr_t p0, p1;
 294
 295                 mb0 = mb_alloc[0];
 296                 mb1 = mb_alloc[1];
 297
 298                 /* Flush mbuf with pkt template.
 299                  * Data to be rearmed is 6 bytes long.
 300                  */
 301                 p0 = (uintptr_t)&mb0->rearm_data;
 302                 *(uint64_t *)p0 = rxq->mbuf_initializer;
 303                 p1 = (uintptr_t)&mb1->rearm_data;
 304                 *(uint64_t *)p1 = rxq->mbuf_initializer;
 305
 306                 /* load buf_addr(lo 64bit) and buf_iova(hi 64bit) */
 307                 RTE_BUILD_BUG_ON(offsetof(struct rte_mbuf, buf_iova) !=
 308                                 offsetof(struct rte_mbuf, buf_addr) + 8);
 309                 vaddr0 = _mm_loadu_si128((__m128i *)&mb0->buf_addr);
 310                 vaddr1 = _mm_loadu_si128((__m128i *)&mb1->buf_addr);
 311
 312                 /* convert pa to dma_addr hdr/data */
 313                 dma_addr0 = _mm_unpackhi_epi64(vaddr0, vaddr0);
 314                 dma_addr1 = _mm_unpackhi_epi64(vaddr1, vaddr1);
 315
 316                 /* add headroom to pa values */
 317                 dma_addr0 = _mm_add_epi64(dma_addr0, head_off);
 318                 dma_addr1 = _mm_add_epi64(dma_addr1, head_off);
 319
 320                 /* Do 512 byte alignment to satisfy HW requirement, in the
 321                  * meanwhile, set Header Buffer Address to zero.
 322                  */
 323                 dma_addr0 = _mm_and_si128(dma_addr0, hba_msk);
 324                 dma_addr1 = _mm_and_si128(dma_addr1, hba_msk);
 325
 326                 /* flush desc with pa dma_addr */
 327                 _mm_store_si128((__m128i *)&rxdp++->q, dma_addr0);
 328                 _mm_store_si128((__m128i *)&rxdp++->q, dma_addr1);
 329
 330                 /* enforce 512B alignment on default Rx virtual addresses */
 331                 mb0->data_off = (uint16_t)(RTE_PTR_ALIGN((char *)mb0->buf_addr
 332                                 + RTE_PKTMBUF_HEADROOM, FM10K_RX_DATABUF_ALIGN)
 333                                 - (char *)mb0->buf_addr);
 334                 mb1->data_off = (uint16_t)(RTE_PTR_ALIGN((char *)mb1->buf_addr
 335                                 + RTE_PKTMBUF_HEADROOM, FM10K_RX_DATABUF_ALIGN)
 336                                 - (char *)mb1->buf_addr);
 337         }
 338
 339         rxq->rxrearm_start += RTE_FM10K_RXQ_REARM_THRESH;
 340         if (rxq->rxrearm_start >= rxq->nb_desc)
 341                 rxq->rxrearm_start = 0;
 342
 343         rxq->rxrearm_nb -= RTE_FM10K_RXQ_REARM_THRESH;
 344
 345         rx_id = (uint16_t)((rxq->rxrearm_start == 0) ?
 346                         (rxq->nb_desc - 1) : (rxq->rxrearm_start - 1));
 347
 348         /* Update the tail pointer on the NIC */
 349         FM10K_PCI_REG_WRITE(rxq->tail_ptr, rx_id);
 350 }
 351
 352 void __rte_cold
 353 fm10k_rx_queue_release_mbufs_vec(struct fm10k_rx_queue *rxq)
 354 {
 355         const unsigned mask = rxq->nb_desc - 1;
 356         unsigned i;
 357
 358         if (rxq->sw_ring == NULL || rxq->rxrearm_nb >= rxq->nb_desc)
 359                 return;
 360
 361         /* free all mbufs that are valid in the ring */
 362         if (rxq->rxrearm_nb == 0) {
 363                 for (i = 0; i < rxq->nb_desc; i++)
 364                         if (rxq->sw_ring[i] != NULL)
 365                                 rte_pktmbuf_free_seg(rxq->sw_ring[i]);
 366         } else {
 367                 for (i = rxq->next_dd; i != rxq->rxrearm_start;
 368                                 i = (i + 1) & mask)
 369                         rte_pktmbuf_free_seg(rxq->sw_ring[i]);
 370         }
 371         rxq->rxrearm_nb = rxq->nb_desc;
 372
 373         /* set all entries to NULL */
 374         memset(rxq->sw_ring, 0, sizeof(rxq->sw_ring[0]) * rxq->nb_desc);
 375 }
 376
 377 static inline uint16_t
 378 fm10k_recv_raw_pkts_vec(void *rx_queue, struct rte_mbuf **rx_pkts,
 379                 uint16_t nb_pkts, uint8_t *split_packet)
 380 {
 381         volatile union fm10k_rx_desc *rxdp;
 382         struct rte_mbuf **mbufp;
 383         uint16_t nb_pkts_recd;
 384         int pos;
 385         struct fm10k_rx_queue *rxq = rx_queue;
 386         uint64_t var;
 387         __m128i shuf_msk;
 388         __m128i dd_check, eop_check;
 389         uint16_t next_dd;
 390
 391         next_dd = rxq->next_dd;
 392
 393         /* Just the act of getting into the function from the application is
 394          * going to cost about 7 cycles
 395          */
 396         rxdp = rxq->hw_ring + next_dd;
 397
 398         rte_prefetch0(rxdp);
 399
 400         /* See if we need to rearm the RX queue - gives the prefetch a bit
 401          * of time to act
 402          */
 403         if (rxq->rxrearm_nb > RTE_FM10K_RXQ_REARM_THRESH)
 404                 fm10k_rxq_rearm(rxq);
 405
 406         /* Before we start moving massive data around, check to see if
 407          * there is actually a packet available
 408          */
 409         if (!(rxdp->d.staterr & FM10K_RXD_STATUS_DD))
 410                 return 0;
 411
 412         /* Vecotr RX will process 4 packets at a time, strip the unaligned
 413          * tails in case it's not multiple of 4.
 414          */
 415         nb_pkts = RTE_ALIGN_FLOOR(nb_pkts, RTE_FM10K_DESCS_PER_LOOP);
 416
 417         /* 4 packets DD mask */
 418         dd_check = _mm_set_epi64x(0x0000000100000001LL, 0x0000000100000001LL);
 419
 420         /* 4 packets EOP mask */
 421         eop_check = _mm_set_epi64x(0x0000000200000002LL, 0x0000000200000002LL);
 422
 423         /* mask to shuffle from desc. to mbuf */
 424         shuf_msk = _mm_set_epi8(
 425                 7, 6, 5, 4,  /* octet 4~7, 32bits rss */
 426                 15, 14,      /* octet 14~15, low 16 bits vlan_macip */
 427                 13, 12,      /* octet 12~13, 16 bits data_len */
 428                 0xFF, 0xFF,  /* skip high 16 bits pkt_len, zero out */
 429                 13, 12,      /* octet 12~13, low 16 bits pkt_len */
 430                 0xFF, 0xFF,  /* skip high 16 bits pkt_type */
 431                 0xFF, 0xFF   /* Skip pkt_type field in shuffle operation */
 432                 );
 433         /*
 434          * Compile-time verify the shuffle mask
 435          * NOTE: some field positions already verified above, but duplicated
 436          * here for completeness in case of future modifications.
 437          */
 438         RTE_BUILD_BUG_ON(offsetof(struct rte_mbuf, pkt_len) !=
 439                         offsetof(struct rte_mbuf, rx_descriptor_fields1) + 4);
 440         RTE_BUILD_BUG_ON(offsetof(struct rte_mbuf, data_len) !=
 441                         offsetof(struct rte_mbuf, rx_descriptor_fields1) + 8);
 442         RTE_BUILD_BUG_ON(offsetof(struct rte_mbuf, vlan_tci) !=
 443                         offsetof(struct rte_mbuf, rx_descriptor_fields1) + 10);
 444         RTE_BUILD_BUG_ON(offsetof(struct rte_mbuf, hash) !=
 445                         offsetof(struct rte_mbuf, rx_descriptor_fields1) + 12);
 446
 447         /* Cache is empty -> need to scan the buffer rings, but first move
 448          * the next 'n' mbufs into the cache
 449          */
 450         mbufp = &rxq->sw_ring[next_dd];
 451
 452         /* A. load 4 packet in one loop
 453          * [A*. mask out 4 unused dirty field in desc]
 454          * B. copy 4 mbuf point from swring to rx_pkts
 455          * C. calc the number of DD bits among the 4 packets
 456          * [C*. extract the end-of-packet bit, if requested]
 457          * D. fill info. from desc to mbuf
 458          */
 459         for (pos = 0, nb_pkts_recd = 0; pos < nb_pkts;
 460                         pos += RTE_FM10K_DESCS_PER_LOOP,
 461                         rxdp += RTE_FM10K_DESCS_PER_LOOP) {
 462                 __m128i descs0[RTE_FM10K_DESCS_PER_LOOP];
 463                 __m128i pkt_mb1, pkt_mb2, pkt_mb3, pkt_mb4;
 464                 __m128i zero, staterr, sterr_tmp1, sterr_tmp2;
 465                 __m128i mbp1;
 466                 /* 2 64 bit or 4 32 bit mbuf pointers in one XMM reg. */
 467 #if defined(RTE_ARCH_X86_64)
 468                 __m128i mbp2;
 469 #endif
 470
 471                 /* B.1 load 2 (64 bit) or 4 (32 bit) mbuf points */
 472                 mbp1 = _mm_loadu_si128((__m128i *)&mbufp[pos]);
 473
 474                 /* Read desc statuses backwards to avoid race condition */
 475                 /* A.1 load desc[3] */
 476                 descs0[3] = _mm_loadu_si128((__m128i *)(rxdp + 3));
 477                 rte_compiler_barrier();
 478
 479                 /* B.2 copy 2 64 bit or 4 32 bit mbuf point into rx_pkts */
 480                 _mm_storeu_si128((__m128i *)&rx_pkts[pos], mbp1);
 481
 482 #if defined(RTE_ARCH_X86_64)
 483                 /* B.1 load 2 64 bit mbuf poitns */
 484                 mbp2 = _mm_loadu_si128((__m128i *)&mbufp[pos+2]);
 485 #endif
 486
 487                 /* A.1 load desc[2-0] */
 488                 descs0[2] = _mm_loadu_si128((__m128i *)(rxdp + 2));
 489                 rte_compiler_barrier();
 490                 descs0[1] = _mm_loadu_si128((__m128i *)(rxdp + 1));
 491                 rte_compiler_barrier();
 492                 descs0[0] = _mm_loadu_si128((__m128i *)(rxdp));
 493
 494 #if defined(RTE_ARCH_X86_64)
 495                 /* B.2 copy 2 mbuf point into rx_pkts  */
 496                 _mm_storeu_si128((__m128i *)&rx_pkts[pos+2], mbp2);
 497 #endif
 498
 499                 /* avoid compiler reorder optimization */
 500                 rte_compiler_barrier();
 501
 502                 if (split_packet) {
 503                         rte_mbuf_prefetch_part2(rx_pkts[pos]);
 504                         rte_mbuf_prefetch_part2(rx_pkts[pos + 1]);
 505                         rte_mbuf_prefetch_part2(rx_pkts[pos + 2]);
 506                         rte_mbuf_prefetch_part2(rx_pkts[pos + 3]);
 507                 }
 508
 509                 /* D.1 pkt 3,4 convert format from desc to pktmbuf */
 510                 pkt_mb4 = _mm_shuffle_epi8(descs0[3], shuf_msk);
 511                 pkt_mb3 = _mm_shuffle_epi8(descs0[2], shuf_msk);
 512
 513                 /* C.1 4=>2 filter staterr info only */
 514                 sterr_tmp2 = _mm_unpackhi_epi32(descs0[3], descs0[2]);
 515                 /* C.1 4=>2 filter staterr info only */
 516                 sterr_tmp1 = _mm_unpackhi_epi32(descs0[1], descs0[0]);
 517
 518                 /* set ol_flags with vlan packet type */
 519                 fm10k_desc_to_olflags_v(descs0, &rx_pkts[pos]);
 520
 521                 /* D.1 pkt 1,2 convert format from desc to pktmbuf */
 522                 pkt_mb2 = _mm_shuffle_epi8(descs0[1], shuf_msk);
 523                 pkt_mb1 = _mm_shuffle_epi8(descs0[0], shuf_msk);
 524
 525                 /* C.2 get 4 pkts staterr value  */
 526                 zero = _mm_xor_si128(dd_check, dd_check);
 527                 staterr = _mm_unpacklo_epi32(sterr_tmp1, sterr_tmp2);
 528
 529                 /* D.3 copy final 3,4 data to rx_pkts */
 530                 _mm_storeu_si128((void *)&rx_pkts[pos+3]->rx_descriptor_fields1,
 531                                 pkt_mb4);
 532                 _mm_storeu_si128((void *)&rx_pkts[pos+2]->rx_descriptor_fields1,
 533                                 pkt_mb3);
 534
 535                 /* C* extract and record EOP bit */
 536                 if (split_packet) {
 537                         __m128i eop_shuf_mask = _mm_set_epi8(
 538                                         0xFF, 0xFF, 0xFF, 0xFF,
 539                                         0xFF, 0xFF, 0xFF, 0xFF,
 540                                         0xFF, 0xFF, 0xFF, 0xFF,
 541                                         0x04, 0x0C, 0x00, 0x08
 542                                         );
 543
 544                         /* and with mask to extract bits, flipping 1-0 */
 545                         __m128i eop_bits = _mm_andnot_si128(staterr, eop_check);
 546                         /* the staterr values are not in order, as the count
 547                          * of dd bits doesn't care. However, for end of
 548                          * packet tracking, we do care, so shuffle. This also
 549                          * compresses the 32-bit values to 8-bit
 550                          */
 551                         eop_bits = _mm_shuffle_epi8(eop_bits, eop_shuf_mask);
 552                         /* store the resulting 32-bit value */
 553                         *(int *)split_packet = _mm_cvtsi128_si32(eop_bits);
 554                         split_packet += RTE_FM10K_DESCS_PER_LOOP;
 555
 556                         /* zero-out next pointers */
 557                         rx_pkts[pos]->next = NULL;
 558                         rx_pkts[pos + 1]->next = NULL;
 559                         rx_pkts[pos + 2]->next = NULL;
 560                         rx_pkts[pos + 3]->next = NULL;
 561                 }
 562
 563                 /* C.3 calc available number of desc */
 564                 staterr = _mm_and_si128(staterr, dd_check);
 565                 staterr = _mm_packs_epi32(staterr, zero);
 566
 567                 /* D.3 copy final 1,2 data to rx_pkts */
 568                 _mm_storeu_si128((void *)&rx_pkts[pos+1]->rx_descriptor_fields1,
 569                                 pkt_mb2);
 570                 _mm_storeu_si128((void *)&rx_pkts[pos]->rx_descriptor_fields1,
 571                                 pkt_mb1);
 572
 573                 fm10k_desc_to_pktype_v(descs0, &rx_pkts[pos]);
 574
 575                 /* C.4 calc avaialbe number of desc */
 576                 var = __builtin_popcountll(_mm_cvtsi128_si64(staterr));
 577                 nb_pkts_recd += var;
 578                 if (likely(var != RTE_FM10K_DESCS_PER_LOOP))
 579                         break;
 580         }
 581
 582         /* Update our internal tail pointer */
 583         rxq->next_dd = (uint16_t)(rxq->next_dd + nb_pkts_recd);
 584         rxq->next_dd = (uint16_t)(rxq->next_dd & (rxq->nb_desc - 1));
 585         rxq->rxrearm_nb = (uint16_t)(rxq->rxrearm_nb + nb_pkts_recd);
 586
 587         return nb_pkts_recd;
 588 }
 589
 590 /* vPMD receive routine
 591  *
 592  * Notice:
 593  * - don't support ol_flags for rss and csum err
 594  */
 595 uint16_t
 596 fm10k_recv_pkts_vec(void *rx_queue, struct rte_mbuf **rx_pkts,
 597                 uint16_t nb_pkts)
 598 {
 599         return fm10k_recv_raw_pkts_vec(rx_queue, rx_pkts, nb_pkts, NULL);
 600 }
 601
 602 static inline uint16_t
 603 fm10k_reassemble_packets(struct fm10k_rx_queue *rxq,
 604                 struct rte_mbuf **rx_bufs,
 605                 uint16_t nb_bufs, uint8_t *split_flags)
 606 {
 607         struct rte_mbuf *pkts[RTE_FM10K_MAX_RX_BURST]; /*finished pkts*/
 608         struct rte_mbuf *start = rxq->pkt_first_seg;
 609         struct rte_mbuf *end =  rxq->pkt_last_seg;
 610         unsigned pkt_idx, buf_idx;
 611
 612         for (buf_idx = 0, pkt_idx = 0; buf_idx < nb_bufs; buf_idx++) {
 613                 if (end != NULL) {
 614                         /* processing a split packet */
 615                         end->next = rx_bufs[buf_idx];
 616                         start->nb_segs++;
 617                         start->pkt_len += rx_bufs[buf_idx]->data_len;
 618                         end = end->next;
 619
 620                         if (!split_flags[buf_idx]) {
 621                                 /* it's the last packet of the set */
 622 #ifdef RTE_LIBRTE_FM10K_RX_OLFLAGS_ENABLE
 623                                 start->hash = end->hash;
 624                                 start->ol_flags = end->ol_flags;
 625                                 start->packet_type = end->packet_type;
 626 #endif
 627                                 pkts[pkt_idx++] = start;
 628                                 start = end = NULL;
 629                         }
 630                 } else {
 631                         /* not processing a split packet */
 632                         if (!split_flags[buf_idx]) {
 633                                 /* not a split packet, save and skip */
 634                                 pkts[pkt_idx++] = rx_bufs[buf_idx];
 635                                 continue;
 636                         }
 637                         end = start = rx_bufs[buf_idx];
 638                 }
 639         }
 640
 641         /* save the partial packet for next time */
 642         rxq->pkt_first_seg = start;
 643         rxq->pkt_last_seg = end;
 644         memcpy(rx_bufs, pkts, pkt_idx * (sizeof(*pkts)));
 645         return pkt_idx;
 646 }
 647
 648 /**
 649  * vPMD receive routine that reassembles single burst of 32 scattered packets
 650  *
 651  * Notice:
 652  * - don't support ol_flags for rss and csum err
 653  */
 654 static uint16_t
 655 fm10k_recv_scattered_burst_vec(void *rx_queue, struct rte_mbuf **rx_pkts,
 656                                uint16_t nb_pkts)
 657 {
 658         struct fm10k_rx_queue *rxq = rx_queue;
 659         uint8_t split_flags[RTE_FM10K_MAX_RX_BURST] = {0};
 660         unsigned i = 0;
 661
 662         /* Split_flags only can support max of RTE_FM10K_MAX_RX_BURST */
 663         nb_pkts = RTE_MIN(nb_pkts, RTE_FM10K_MAX_RX_BURST);
 664         /* get some new buffers */
 665         uint16_t nb_bufs = fm10k_recv_raw_pkts_vec(rxq, rx_pkts, nb_pkts,
 666                         split_flags);
 667         if (nb_bufs == 0)
 668                 return 0;
 669
 670         /* happy day case, full burst + no packets to be joined */
 671         const uint64_t *split_fl64 = (uint64_t *)split_flags;
 672
 673         if (rxq->pkt_first_seg == NULL &&
 674                         split_fl64[0] == 0 && split_fl64[1] == 0 &&
 675                         split_fl64[2] == 0 && split_fl64[3] == 0)
 676                 return nb_bufs;
 677
 678         /* reassemble any packets that need reassembly*/
 679         if (rxq->pkt_first_seg == NULL) {
 680                 /* find the first split flag, and only reassemble then*/
 681                 while (i < nb_bufs && !split_flags[i])
 682                         i++;
 683                 if (i == nb_bufs)
 684                         return nb_bufs;
 685                 rxq->pkt_first_seg = rx_pkts[i];
 686         }
 687         return i + fm10k_reassemble_packets(rxq, &rx_pkts[i], nb_bufs - i,
 688                 &split_flags[i]);
 689 }
 690
 691 /**
 692  * vPMD receive routine that reassembles scattered packets.
 693  */
 694 uint16_t
 695 fm10k_recv_scattered_pkts_vec(void *rx_queue, struct rte_mbuf **rx_pkts,
 696                               uint16_t nb_pkts)
 697 {
 698         uint16_t retval = 0;
 699
 700         while (nb_pkts > RTE_FM10K_MAX_RX_BURST) {
 701                 uint16_t burst;
 702
 703                 burst = fm10k_recv_scattered_burst_vec(rx_queue,
 704                                                        rx_pkts + retval,
 705                                                        RTE_FM10K_MAX_RX_BURST);
 706                 retval += burst;
 707                 nb_pkts -= burst;
 708                 if (burst < RTE_FM10K_MAX_RX_BURST)
 709                         return retval;
 710         }
 711
 712         return retval + fm10k_recv_scattered_burst_vec(rx_queue,
 713                                                        rx_pkts + retval,
 714                                                        nb_pkts);
 715 }
 716
 717 static const struct fm10k_txq_ops vec_txq_ops = {
 718         .reset = fm10k_reset_tx_queue,
 719 };
 720
 721 void __rte_cold
 722 fm10k_txq_vec_setup(struct fm10k_tx_queue *txq)
 723 {
 724         txq->ops = &vec_txq_ops;
 725 }
 726
 727 int __rte_cold
 728 fm10k_tx_vec_condition_check(struct fm10k_tx_queue *txq)
 729 {
 730         /* Vector TX can't offload any features yet */
 731         if (txq->offloads != 0)
 732                 return -1;
 733
 734         if (txq->tx_ftag_en)
 735                 return -1;
 736
 737         return 0;
 738 }
 739
 740 static inline void
 741 vtx1(volatile struct fm10k_tx_desc *txdp,
 742                 struct rte_mbuf *pkt, uint64_t flags)
 743 {
 744         __m128i descriptor = _mm_set_epi64x(flags << 56 |
 745                         (uint64_t)pkt->vlan_tci << 16 | (uint64_t)pkt->data_len,
 746                         MBUF_DMA_ADDR(pkt));
 747         _mm_store_si128((__m128i *)txdp, descriptor);
 748 }
 749
 750 static inline void
 751 vtx(volatile struct fm10k_tx_desc *txdp,
 752                 struct rte_mbuf **pkt, uint16_t nb_pkts,  uint64_t flags)
 753 {
 754         int i;
 755
 756         for (i = 0; i < nb_pkts; ++i, ++txdp, ++pkt)
 757                 vtx1(txdp, *pkt, flags);
 758 }
 759
 760 static __rte_always_inline int
 761 fm10k_tx_free_bufs(struct fm10k_tx_queue *txq)
 762 {
 763         struct rte_mbuf **txep;
 764         uint8_t flags;
 765         uint32_t n;
 766         uint32_t i;
 767         int nb_free = 0;
 768         struct rte_mbuf *m, *free[RTE_FM10K_TX_MAX_FREE_BUF_SZ];
 769
 770         /* check DD bit on threshold descriptor */
 771         flags = txq->hw_ring[txq->next_dd].flags;
 772         if (!(flags & FM10K_TXD_FLAG_DONE))
 773                 return 0;
 774
 775         n = txq->rs_thresh;
 776
 777         /* First buffer to free from S/W ring is at index
 778          * next_dd - (rs_thresh-1)
 779          */
 780         txep = &txq->sw_ring[txq->next_dd - (n - 1)];
 781         m = rte_pktmbuf_prefree_seg(txep[0]);
 782         if (likely(m != NULL)) {
 783                 free[0] = m;
 784                 nb_free = 1;
 785                 for (i = 1; i < n; i++) {
 786                         m = rte_pktmbuf_prefree_seg(txep[i]);
 787                         if (likely(m != NULL)) {
 788                                 if (likely(m->pool == free[0]->pool))
 789                                         free[nb_free++] = m;
 790                                 else {
 791                                         rte_mempool_put_bulk(free[0]->pool,
 792                                                         (void *)free, nb_free);
 793                                         free[0] = m;
 794                                         nb_free = 1;
 795                                 }
 796                         }
 797                 }
 798                 rte_mempool_put_bulk(free[0]->pool, (void **)free, nb_free);
 799         } else {
 800                 for (i = 1; i < n; i++) {
 801                         m = rte_pktmbuf_prefree_seg(txep[i]);
 802                         if (m != NULL)
 803                                 rte_mempool_put(m->pool, m);
 804                 }
 805         }
 806
 807         /* buffers were freed, update counters */
 808         txq->nb_free = (uint16_t)(txq->nb_free + txq->rs_thresh);
 809         txq->next_dd = (uint16_t)(txq->next_dd + txq->rs_thresh);
 810         if (txq->next_dd >= txq->nb_desc)
 811                 txq->next_dd = (uint16_t)(txq->rs_thresh - 1);
 812
 813         return txq->rs_thresh;
 814 }
 815
 816 static __rte_always_inline void
 817 tx_backlog_entry(struct rte_mbuf **txep,
 818                  struct rte_mbuf **tx_pkts, uint16_t nb_pkts)
 819 {
 820         int i;
 821
 822         for (i = 0; i < (int)nb_pkts; ++i)
 823                 txep[i] = tx_pkts[i];
 824 }
 825
 826 uint16_t
 827 fm10k_xmit_fixed_burst_vec(void *tx_queue, struct rte_mbuf **tx_pkts,
 828                            uint16_t nb_pkts)
 829 {
 830         struct fm10k_tx_queue *txq = (struct fm10k_tx_queue *)tx_queue;
 831         volatile struct fm10k_tx_desc *txdp;
 832         struct rte_mbuf **txep;
 833         uint16_t n, nb_commit, tx_id;
 834         uint64_t flags = FM10K_TXD_FLAG_LAST;
 835         uint64_t rs = FM10K_TXD_FLAG_RS | FM10K_TXD_FLAG_LAST;
 836         int i;
 837
 838         /* cross rx_thresh boundary is not allowed */
 839         nb_pkts = RTE_MIN(nb_pkts, txq->rs_thresh);
 840
 841         if (txq->nb_free < txq->free_thresh)
 842                 fm10k_tx_free_bufs(txq);
 843
 844         nb_commit = nb_pkts = (uint16_t)RTE_MIN(txq->nb_free, nb_pkts);
 845         if (unlikely(nb_pkts == 0))
 846                 return 0;
 847
 848         tx_id = txq->next_free;
 849         txdp = &txq->hw_ring[tx_id];
 850         txep = &txq->sw_ring[tx_id];
 851
 852         txq->nb_free = (uint16_t)(txq->nb_free - nb_pkts);
 853
 854         n = (uint16_t)(txq->nb_desc - tx_id);
 855         if (nb_commit >= n) {
 856                 tx_backlog_entry(txep, tx_pkts, n);
 857
 858                 for (i = 0; i < n - 1; ++i, ++tx_pkts, ++txdp)
 859                         vtx1(txdp, *tx_pkts, flags);
 860
 861                 vtx1(txdp, *tx_pkts++, rs);
 862
 863                 nb_commit = (uint16_t)(nb_commit - n);
 864
 865                 tx_id = 0;
 866                 txq->next_rs = (uint16_t)(txq->rs_thresh - 1);
 867
 868                 /* avoid reach the end of ring */
 869                 txdp = &(txq->hw_ring[tx_id]);
 870                 txep = &txq->sw_ring[tx_id];
 871         }
 872
 873         tx_backlog_entry(txep, tx_pkts, nb_commit);
 874
 875         vtx(txdp, tx_pkts, nb_commit, flags);
 876
 877         tx_id = (uint16_t)(tx_id + nb_commit);
 878         if (tx_id > txq->next_rs) {
 879                 txq->hw_ring[txq->next_rs].flags |= FM10K_TXD_FLAG_RS;
 880                 txq->next_rs = (uint16_t)(txq->next_rs + txq->rs_thresh);
 881         }
 882
 883         txq->next_free = tx_id;
 884
 885         FM10K_PCI_REG_WRITE(txq->tail_ptr, txq->next_free);
 886
 887         return nb_pkts;
 888 }
 889
 890 static void __rte_cold
 891 fm10k_reset_tx_queue(struct fm10k_tx_queue *txq)
 892 {
 893         static const struct fm10k_tx_desc zeroed_desc = {0};
 894         struct rte_mbuf **txe = txq->sw_ring;
 895         uint16_t i;
 896
 897         /* Zero out HW ring memory */
 898         for (i = 0; i < txq->nb_desc; i++)
 899                 txq->hw_ring[i] = zeroed_desc;
 900
 901         /* Initialize SW ring entries */
 902         for (i = 0; i < txq->nb_desc; i++)
 903                 txe[i] = NULL;
 904
 905         txq->next_dd = (uint16_t)(txq->rs_thresh - 1);
 906         txq->next_rs = (uint16_t)(txq->rs_thresh - 1);
 907
 908         txq->next_free = 0;
 909         txq->nb_used = 0;
 910         /* Always allow 1 descriptor to be un-allocated to avoid
 911          * a H/W race condition
 912          */
 913         txq->nb_free = (uint16_t)(txq->nb_desc - 1);
 914         FM10K_PCI_REG_WRITE(txq->tail_ptr, 0);
 915 }