drivers/net/i40e/i40e_rxtx_vec_neon.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2010-2015 Intel Corporation.
   3  * Copyright(c) 2016-2018, Linaro Limited.
   4  */
   5
   6 #include <stdint.h>
   7 #include <rte_ethdev_driver.h>
   8 #include <rte_malloc.h>
   9 #include <rte_vect.h>
  10
  11 #include "base/i40e_prototype.h"
  12 #include "base/i40e_type.h"
  13 #include "i40e_ethdev.h"
  14 #include "i40e_rxtx.h"
  15 #include "i40e_rxtx_vec_common.h"
  16
  17
  18 #pragma GCC diagnostic ignored "-Wcast-qual"
  19
  20 static inline void
  21 i40e_rxq_rearm(struct i40e_rx_queue *rxq)
  22 {
  23         int i;
  24         uint16_t rx_id;
  25         volatile union i40e_rx_desc *rxdp;
  26         struct i40e_rx_entry *rxep = &rxq->sw_ring[rxq->rxrearm_start];
  27         struct rte_mbuf *mb0, *mb1;
  28         uint64x2_t dma_addr0, dma_addr1;
  29         uint64x2_t zero = vdupq_n_u64(0);
  30         uint64_t paddr;
  31
  32         rxdp = rxq->rx_ring + rxq->rxrearm_start;
  33
  34         /* Pull 'n' more MBUFs into the software ring */
  35         if (unlikely(rte_mempool_get_bulk(rxq->mp,
  36                                           (void *)rxep,
  37                                           RTE_I40E_RXQ_REARM_THRESH) < 0)) {
  38                 if (rxq->rxrearm_nb + RTE_I40E_RXQ_REARM_THRESH >=
  39                     rxq->nb_rx_desc) {
  40                         for (i = 0; i < RTE_I40E_DESCS_PER_LOOP; i++) {
  41                                 rxep[i].mbuf = &rxq->fake_mbuf;
  42                                 vst1q_u64((uint64_t *)&rxdp[i].read, zero);
  43                         }
  44                 }
  45                 rte_eth_devices[rxq->port_id].data->rx_mbuf_alloc_failed +=
  46                         RTE_I40E_RXQ_REARM_THRESH;
  47                 return;
  48         }
  49
  50         /* Initialize the mbufs in vector, process 2 mbufs in one loop */
  51         for (i = 0; i < RTE_I40E_RXQ_REARM_THRESH; i += 2, rxep += 2) {
  52                 mb0 = rxep[0].mbuf;
  53                 mb1 = rxep[1].mbuf;
  54
  55                 paddr = mb0->buf_iova + RTE_PKTMBUF_HEADROOM;
  56                 dma_addr0 = vdupq_n_u64(paddr);
  57
  58                 /* flush desc with pa dma_addr */
  59                 vst1q_u64((uint64_t *)&rxdp++->read, dma_addr0);
  60
  61                 paddr = mb1->buf_iova + RTE_PKTMBUF_HEADROOM;
  62                 dma_addr1 = vdupq_n_u64(paddr);
  63                 vst1q_u64((uint64_t *)&rxdp++->read, dma_addr1);
  64         }
  65
  66         rxq->rxrearm_start += RTE_I40E_RXQ_REARM_THRESH;
  67         if (rxq->rxrearm_start >= rxq->nb_rx_desc)
  68                 rxq->rxrearm_start = 0;
  69
  70         rxq->rxrearm_nb -= RTE_I40E_RXQ_REARM_THRESH;
  71
  72         rx_id = (uint16_t)((rxq->rxrearm_start == 0) ?
  73                              (rxq->nb_rx_desc - 1) : (rxq->rxrearm_start - 1));
  74
  75         rte_io_wmb();
  76         /* Update the tail pointer on the NIC */
  77         I40E_PCI_REG_WRITE_RELAXED(rxq->qrx_tail, rx_id);
  78 }
  79
  80 static inline void
  81 desc_to_olflags_v(struct i40e_rx_queue *rxq, uint64x2_t descs[4],
  82                   struct rte_mbuf **rx_pkts)
  83 {
  84         uint32x4_t vlan0, vlan1, rss, l3_l4e;
  85         const uint64x2_t mbuf_init = {rxq->mbuf_initializer, 0};
  86         uint64x2_t rearm0, rearm1, rearm2, rearm3;
  87
  88         /* mask everything except RSS, flow director and VLAN flags
  89          * bit2 is for VLAN tag, bit11 for flow director indication
  90          * bit13:12 for RSS indication.
  91          */
  92         const uint32x4_t rss_vlan_msk = {
  93                         0x1c03804, 0x1c03804, 0x1c03804, 0x1c03804};
  94
  95         const uint32x4_t cksum_mask = {
  96                         PKT_RX_IP_CKSUM_GOOD | PKT_RX_IP_CKSUM_BAD |
  97                         PKT_RX_L4_CKSUM_GOOD | PKT_RX_L4_CKSUM_BAD |
  98                         PKT_RX_EIP_CKSUM_BAD,
  99                         PKT_RX_IP_CKSUM_GOOD | PKT_RX_IP_CKSUM_BAD |
 100                         PKT_RX_L4_CKSUM_GOOD | PKT_RX_L4_CKSUM_BAD |
 101                         PKT_RX_EIP_CKSUM_BAD,
 102                         PKT_RX_IP_CKSUM_GOOD | PKT_RX_IP_CKSUM_BAD |
 103                         PKT_RX_L4_CKSUM_GOOD | PKT_RX_L4_CKSUM_BAD |
 104                         PKT_RX_EIP_CKSUM_BAD,
 105                         PKT_RX_IP_CKSUM_GOOD | PKT_RX_IP_CKSUM_BAD |
 106                         PKT_RX_L4_CKSUM_GOOD | PKT_RX_L4_CKSUM_BAD |
 107                         PKT_RX_EIP_CKSUM_BAD};
 108
 109         /* map rss and vlan type to rss hash and vlan flag */
 110         const uint8x16_t vlan_flags = {
 111                         0, 0, 0, 0,
 112                         PKT_RX_VLAN | PKT_RX_VLAN_STRIPPED, 0, 0, 0,
 113                         0, 0, 0, 0,
 114                         0, 0, 0, 0};
 115
 116         const uint8x16_t rss_flags = {
 117                         0, PKT_RX_FDIR, 0, 0,
 118                         0, 0, PKT_RX_RSS_HASH, PKT_RX_RSS_HASH | PKT_RX_FDIR,
 119                         0, 0, 0, 0,
 120                         0, 0, 0, 0};
 121
 122         const uint8x16_t l3_l4e_flags = {
 123                         (PKT_RX_IP_CKSUM_GOOD | PKT_RX_L4_CKSUM_GOOD) >> 1,
 124                         PKT_RX_IP_CKSUM_BAD >> 1,
 125                         (PKT_RX_IP_CKSUM_GOOD | PKT_RX_L4_CKSUM_BAD) >> 1,
 126                         (PKT_RX_L4_CKSUM_BAD | PKT_RX_IP_CKSUM_BAD) >> 1,
 127                         (PKT_RX_IP_CKSUM_GOOD | PKT_RX_EIP_CKSUM_BAD) >> 1,
 128                         (PKT_RX_EIP_CKSUM_BAD | PKT_RX_IP_CKSUM_BAD) >> 1,
 129                         (PKT_RX_IP_CKSUM_GOOD | PKT_RX_EIP_CKSUM_BAD |
 130                          PKT_RX_L4_CKSUM_BAD) >> 1,
 131                         (PKT_RX_EIP_CKSUM_BAD | PKT_RX_L4_CKSUM_BAD |
 132                          PKT_RX_IP_CKSUM_BAD) >> 1,
 133                         0, 0, 0, 0, 0, 0, 0, 0};
 134
 135         vlan0 = vzipq_u32(vreinterpretq_u32_u64(descs[0]),
 136                           vreinterpretq_u32_u64(descs[2])).val[1];
 137         vlan1 = vzipq_u32(vreinterpretq_u32_u64(descs[1]),
 138                           vreinterpretq_u32_u64(descs[3])).val[1];
 139         vlan0 = vzipq_u32(vlan0, vlan1).val[0];
 140
 141         vlan1 = vandq_u32(vlan0, rss_vlan_msk);
 142         vlan0 = vreinterpretq_u32_u8(vqtbl1q_u8(vlan_flags,
 143                                                 vreinterpretq_u8_u32(vlan1)));
 144
 145         rss = vshrq_n_u32(vlan1, 11);
 146         rss = vreinterpretq_u32_u8(vqtbl1q_u8(rss_flags,
 147                                               vreinterpretq_u8_u32(rss)));
 148
 149         l3_l4e = vshrq_n_u32(vlan1, 22);
 150         l3_l4e = vreinterpretq_u32_u8(vqtbl1q_u8(l3_l4e_flags,
 151                                               vreinterpretq_u8_u32(l3_l4e)));
 152         /* then we shift left 1 bit */
 153         l3_l4e = vshlq_n_u32(l3_l4e, 1);
 154         /* we need to mask out the reduntant bits */
 155         l3_l4e = vandq_u32(l3_l4e, cksum_mask);
 156
 157         vlan0 = vorrq_u32(vlan0, rss);
 158         vlan0 = vorrq_u32(vlan0, l3_l4e);
 159
 160         rearm0 = vsetq_lane_u64(vgetq_lane_u32(vlan0, 0), mbuf_init, 1);
 161         rearm1 = vsetq_lane_u64(vgetq_lane_u32(vlan0, 1), mbuf_init, 1);
 162         rearm2 = vsetq_lane_u64(vgetq_lane_u32(vlan0, 2), mbuf_init, 1);
 163         rearm3 = vsetq_lane_u64(vgetq_lane_u32(vlan0, 3), mbuf_init, 1);
 164
 165         vst1q_u64((uint64_t *)&rx_pkts[0]->rearm_data, rearm0);
 166         vst1q_u64((uint64_t *)&rx_pkts[1]->rearm_data, rearm1);
 167         vst1q_u64((uint64_t *)&rx_pkts[2]->rearm_data, rearm2);
 168         vst1q_u64((uint64_t *)&rx_pkts[3]->rearm_data, rearm3);
 169 }
 170
 171 #define PKTLEN_SHIFT     10
 172 #define I40E_UINT16_BIT (CHAR_BIT * sizeof(uint16_t))
 173
 174 static inline void
 175 desc_to_ptype_v(uint64x2_t descs[4], struct rte_mbuf **__rte_restrict rx_pkts,
 176                 uint32_t *__rte_restrict ptype_tbl)
 177 {
 178         int i;
 179         uint8_t ptype;
 180         uint8x16_t tmp;
 181
 182         for (i = 0; i < 4; i++) {
 183                 tmp = vreinterpretq_u8_u64(vshrq_n_u64(descs[i], 30));
 184                 ptype = vgetq_lane_u8(tmp, 8);
 185                 rx_pkts[i]->packet_type = ptype_tbl[ptype];
 186         }
 187
 188 }
 189
 190 /**
 191  * vPMD raw receive routine, only accept(nb_pkts >= RTE_I40E_DESCS_PER_LOOP)
 192  *
 193  * Notice:
 194  * - nb_pkts < RTE_I40E_DESCS_PER_LOOP, just return no packet
 195  * - floor align nb_pkts to a RTE_I40E_DESCS_PER_LOOP power-of-two
 196  */
 197 static inline uint16_t
 198 _recv_raw_pkts_vec(struct i40e_rx_queue *__rte_restrict rxq,
 199                    struct rte_mbuf **__rte_restrict rx_pkts,
 200                    uint16_t nb_pkts, uint8_t *split_packet)
 201 {
 202         volatile union i40e_rx_desc *rxdp;
 203         struct i40e_rx_entry *sw_ring;
 204         uint16_t nb_pkts_recd;
 205         int pos;
 206         uint32_t *ptype_tbl = rxq->vsi->adapter->ptype_tbl;
 207
 208         /* mask to shuffle from desc. to mbuf */
 209         uint8x16_t shuf_msk = {
 210                 0xFF, 0xFF,   /* pkt_type set as unknown */
 211                 0xFF, 0xFF,   /* pkt_type set as unknown */
 212                 14, 15,       /* octet 15~14, low 16 bits pkt_len */
 213                 0xFF, 0xFF,   /* skip high 16 bits pkt_len, zero out */
 214                 14, 15,       /* octet 15~14, 16 bits data_len */
 215                 2, 3,         /* octet 2~3, low 16 bits vlan_macip */
 216                 4, 5, 6, 7    /* octet 4~7, 32bits rss */
 217                 };
 218
 219         uint8x16_t eop_check = {
 220                 0x02, 0x00, 0x02, 0x00,
 221                 0x02, 0x00, 0x02, 0x00,
 222                 0x00, 0x00, 0x00, 0x00,
 223                 0x00, 0x00, 0x00, 0x00
 224                 };
 225
 226         uint16x8_t crc_adjust = {
 227                 0, 0,         /* ignore pkt_type field */
 228                 rxq->crc_len, /* sub crc on pkt_len */
 229                 0,            /* ignore high-16bits of pkt_len */
 230                 rxq->crc_len, /* sub crc on data_len */
 231                 0, 0, 0       /* ignore non-length fields */
 232                 };
 233
 234         /* nb_pkts has to be floor-aligned to RTE_I40E_DESCS_PER_LOOP */
 235         nb_pkts = RTE_ALIGN_FLOOR(nb_pkts, RTE_I40E_DESCS_PER_LOOP);
 236
 237         /* Just the act of getting into the function from the application is
 238          * going to cost about 7 cycles
 239          */
 240         rxdp = rxq->rx_ring + rxq->rx_tail;
 241
 242         rte_prefetch_non_temporal(rxdp);
 243
 244         /* See if we need to rearm the RX queue - gives the prefetch a bit
 245          * of time to act
 246          */
 247         if (rxq->rxrearm_nb > RTE_I40E_RXQ_REARM_THRESH)
 248                 i40e_rxq_rearm(rxq);
 249
 250         /* Before we start moving massive data around, check to see if
 251          * there is actually a packet available
 252          */
 253         if (!(rxdp->wb.qword1.status_error_len &
 254                         rte_cpu_to_le_32(1 << I40E_RX_DESC_STATUS_DD_SHIFT)))
 255                 return 0;
 256
 257         /* Cache is empty -> need to scan the buffer rings, but first move
 258          * the next 'n' mbufs into the cache
 259          */
 260         sw_ring = &rxq->sw_ring[rxq->rx_tail];
 261
 262         /* A. load 4 packet in one loop
 263          * [A*. mask out 4 unused dirty field in desc]
 264          * B. copy 4 mbuf point from swring to rx_pkts
 265          * C. calc the number of DD bits among the 4 packets
 266          * [C*. extract the end-of-packet bit, if requested]
 267          * D. fill info. from desc to mbuf
 268          */
 269
 270         for (pos = 0, nb_pkts_recd = 0; pos < nb_pkts;
 271                         pos += RTE_I40E_DESCS_PER_LOOP,
 272                         rxdp += RTE_I40E_DESCS_PER_LOOP) {
 273                 uint64x2_t descs[RTE_I40E_DESCS_PER_LOOP];
 274                 uint8x16_t pkt_mb1, pkt_mb2, pkt_mb3, pkt_mb4;
 275                 uint16x8x2_t sterr_tmp1, sterr_tmp2;
 276                 uint64x2_t mbp1, mbp2;
 277                 uint16x8_t staterr;
 278                 uint16x8_t tmp;
 279                 uint64_t stat;
 280
 281                 int32x4_t len_shl = {0, 0, 0, PKTLEN_SHIFT};
 282
 283                 /* B.1 load 1 mbuf point */
 284                 mbp1 = vld1q_u64((uint64_t *)&sw_ring[pos]);
 285                 /* Read desc statuses backwards to avoid race condition */
 286                 /* A.1 load 4 pkts desc */
 287                 descs[3] =  vld1q_u64((uint64_t *)(rxdp + 3));
 288
 289                 /* B.2 copy 2 mbuf point into rx_pkts  */
 290                 vst1q_u64((uint64_t *)&rx_pkts[pos], mbp1);
 291
 292                 /* B.1 load 1 mbuf point */
 293                 mbp2 = vld1q_u64((uint64_t *)&sw_ring[pos + 2]);
 294
 295                 descs[2] =  vld1q_u64((uint64_t *)(rxdp + 2));
 296                 /* B.1 load 2 mbuf point */
 297                 descs[1] =  vld1q_u64((uint64_t *)(rxdp + 1));
 298                 descs[0] =  vld1q_u64((uint64_t *)(rxdp));
 299
 300                 /* B.2 copy 2 mbuf point into rx_pkts  */
 301                 vst1q_u64((uint64_t *)&rx_pkts[pos + 2], mbp2);
 302
 303                 if (split_packet) {
 304                         rte_mbuf_prefetch_part2(rx_pkts[pos]);
 305                         rte_mbuf_prefetch_part2(rx_pkts[pos + 1]);
 306                         rte_mbuf_prefetch_part2(rx_pkts[pos + 2]);
 307                         rte_mbuf_prefetch_part2(rx_pkts[pos + 3]);
 308                 }
 309
 310                 /* pkt 3,4 shift the pktlen field to be 16-bit aligned*/
 311                 uint32x4_t len3 = vshlq_u32(vreinterpretq_u32_u64(descs[3]),
 312                                             len_shl);
 313                 descs[3] = vreinterpretq_u64_u32(len3);
 314                 uint32x4_t len2 = vshlq_u32(vreinterpretq_u32_u64(descs[2]),
 315                                             len_shl);
 316                 descs[2] = vreinterpretq_u64_u32(len2);
 317
 318                 /* D.1 pkt 3,4 convert format from desc to pktmbuf */
 319                 pkt_mb4 = vqtbl1q_u8(vreinterpretq_u8_u64(descs[3]), shuf_msk);
 320                 pkt_mb3 = vqtbl1q_u8(vreinterpretq_u8_u64(descs[2]), shuf_msk);
 321
 322                 /* C.1 4=>2 filter staterr info only */
 323                 sterr_tmp2 = vzipq_u16(vreinterpretq_u16_u64(descs[1]),
 324                                        vreinterpretq_u16_u64(descs[3]));
 325                 /* C.1 4=>2 filter staterr info only */
 326                 sterr_tmp1 = vzipq_u16(vreinterpretq_u16_u64(descs[0]),
 327                                        vreinterpretq_u16_u64(descs[2]));
 328
 329                 /* C.2 get 4 pkts staterr value  */
 330                 staterr = vzipq_u16(sterr_tmp1.val[1],
 331                                     sterr_tmp2.val[1]).val[0];
 332
 333                 desc_to_olflags_v(rxq, descs, &rx_pkts[pos]);
 334
 335                 /* D.2 pkt 3,4 set in_port/nb_seg and remove crc */
 336                 tmp = vsubq_u16(vreinterpretq_u16_u8(pkt_mb4), crc_adjust);
 337                 pkt_mb4 = vreinterpretq_u8_u16(tmp);
 338                 tmp = vsubq_u16(vreinterpretq_u16_u8(pkt_mb3), crc_adjust);
 339                 pkt_mb3 = vreinterpretq_u8_u16(tmp);
 340
 341                 /* pkt 1,2 shift the pktlen field to be 16-bit aligned*/
 342                 uint32x4_t len1 = vshlq_u32(vreinterpretq_u32_u64(descs[1]),
 343                                             len_shl);
 344                 descs[1] = vreinterpretq_u64_u32(len1);
 345                 uint32x4_t len0 = vshlq_u32(vreinterpretq_u32_u64(descs[0]),
 346                                             len_shl);
 347                 descs[0] = vreinterpretq_u64_u32(len0);
 348
 349                 /* D.1 pkt 1,2 convert format from desc to pktmbuf */
 350                 pkt_mb2 = vqtbl1q_u8(vreinterpretq_u8_u64(descs[1]), shuf_msk);
 351                 pkt_mb1 = vqtbl1q_u8(vreinterpretq_u8_u64(descs[0]), shuf_msk);
 352
 353                 /* D.3 copy final 3,4 data to rx_pkts */
 354                 vst1q_u8((void *)&rx_pkts[pos + 3]->rx_descriptor_fields1,
 355                                  pkt_mb4);
 356                 vst1q_u8((void *)&rx_pkts[pos + 2]->rx_descriptor_fields1,
 357                                  pkt_mb3);
 358
 359                 /* D.2 pkt 1,2 set in_port/nb_seg and remove crc */
 360                 tmp = vsubq_u16(vreinterpretq_u16_u8(pkt_mb2), crc_adjust);
 361                 pkt_mb2 = vreinterpretq_u8_u16(tmp);
 362                 tmp = vsubq_u16(vreinterpretq_u16_u8(pkt_mb1), crc_adjust);
 363                 pkt_mb1 = vreinterpretq_u8_u16(tmp);
 364
 365                 /* C* extract and record EOP bit */
 366                 if (split_packet) {
 367                         uint8x16_t eop_shuf_mask = {
 368                                         0x00, 0x02, 0x04, 0x06,
 369                                         0xFF, 0xFF, 0xFF, 0xFF,
 370                                         0xFF, 0xFF, 0xFF, 0xFF,
 371                                         0xFF, 0xFF, 0xFF, 0xFF};
 372                         uint8x16_t eop_bits;
 373
 374                         /* and with mask to extract bits, flipping 1-0 */
 375                         eop_bits = vmvnq_u8(vreinterpretq_u8_u16(staterr));
 376                         eop_bits = vandq_u8(eop_bits, eop_check);
 377                         /* the staterr values are not in order, as the count
 378                          * count of dd bits doesn't care. However, for end of
 379                          * packet tracking, we do care, so shuffle. This also
 380                          * compresses the 32-bit values to 8-bit
 381                          */
 382                         eop_bits = vqtbl1q_u8(eop_bits, eop_shuf_mask);
 383
 384                         /* store the resulting 32-bit value */
 385                         vst1q_lane_u32((uint32_t *)split_packet,
 386                                        vreinterpretq_u32_u8(eop_bits), 0);
 387                         split_packet += RTE_I40E_DESCS_PER_LOOP;
 388
 389                         /* zero-out next pointers */
 390                         rx_pkts[pos]->next = NULL;
 391                         rx_pkts[pos + 1]->next = NULL;
 392                         rx_pkts[pos + 2]->next = NULL;
 393                         rx_pkts[pos + 3]->next = NULL;
 394                 }
 395
 396                 staterr = vshlq_n_u16(staterr, I40E_UINT16_BIT - 1);
 397                 staterr = vreinterpretq_u16_s16(
 398                                 vshrq_n_s16(vreinterpretq_s16_u16(staterr),
 399                                             I40E_UINT16_BIT - 1));
 400                 stat = ~vgetq_lane_u64(vreinterpretq_u64_u16(staterr), 0);
 401
 402                 rte_prefetch_non_temporal(rxdp + RTE_I40E_DESCS_PER_LOOP);
 403
 404                 /* D.3 copy final 1,2 data to rx_pkts */
 405                 vst1q_u8((void *)&rx_pkts[pos + 1]->rx_descriptor_fields1,
 406                          pkt_mb2);
 407                 vst1q_u8((void *)&rx_pkts[pos]->rx_descriptor_fields1,
 408                          pkt_mb1);
 409                 desc_to_ptype_v(descs, &rx_pkts[pos], ptype_tbl);
 410                 /* C.4 calc avaialbe number of desc */
 411                 if (unlikely(stat == 0)) {
 412                         nb_pkts_recd += RTE_I40E_DESCS_PER_LOOP;
 413                 } else {
 414                         nb_pkts_recd += __builtin_ctzl(stat) / I40E_UINT16_BIT;
 415                         break;
 416                 }
 417         }
 418
 419         /* Update our internal tail pointer */
 420         rxq->rx_tail = (uint16_t)(rxq->rx_tail + nb_pkts_recd);
 421         rxq->rx_tail = (uint16_t)(rxq->rx_tail & (rxq->nb_rx_desc - 1));
 422         rxq->rxrearm_nb = (uint16_t)(rxq->rxrearm_nb + nb_pkts_recd);
 423
 424         return nb_pkts_recd;
 425 }
 426
 427  /*
 428  * Notice:
 429  * - nb_pkts < RTE_I40E_DESCS_PER_LOOP, just return no packet
 430  * - nb_pkts > RTE_I40E_VPMD_RX_BURST, only scan RTE_I40E_VPMD_RX_BURST
 431  *   numbers of DD bits
 432  */
 433 uint16_t
 434 i40e_recv_pkts_vec(void *__rte_restrict rx_queue,
 435                 struct rte_mbuf **__rte_restrict rx_pkts, uint16_t nb_pkts)
 436 {
 437         return _recv_raw_pkts_vec(rx_queue, rx_pkts, nb_pkts, NULL);
 438 }
 439
 440 /**
 441  * vPMD receive routine that reassembles single burst of 32 scattered packets
 442  *
 443  * Notice:
 444  * - nb_pkts < RTE_I40E_DESCS_PER_LOOP, just return no packet
 445  */
 446 static uint16_t
 447 i40e_recv_scattered_burst_vec(void *rx_queue, struct rte_mbuf **rx_pkts,
 448                               uint16_t nb_pkts)
 449 {
 450
 451         struct i40e_rx_queue *rxq = rx_queue;
 452         uint8_t split_flags[RTE_I40E_VPMD_RX_BURST] = {0};
 453
 454         /* get some new buffers */
 455         uint16_t nb_bufs = _recv_raw_pkts_vec(rxq, rx_pkts, nb_pkts,
 456                         split_flags);
 457         if (nb_bufs == 0)
 458                 return 0;
 459
 460         /* happy day case, full burst + no packets to be joined */
 461         const uint64_t *split_fl64 = (uint64_t *)split_flags;
 462
 463         if (rxq->pkt_first_seg == NULL &&
 464                         split_fl64[0] == 0 && split_fl64[1] == 0 &&
 465                         split_fl64[2] == 0 && split_fl64[3] == 0)
 466                 return nb_bufs;
 467
 468         /* reassemble any packets that need reassembly*/
 469         unsigned i = 0;
 470
 471         if (rxq->pkt_first_seg == NULL) {
 472                 /* find the first split flag, and only reassemble then*/
 473                 while (i < nb_bufs && !split_flags[i])
 474                         i++;
 475                 if (i == nb_bufs)
 476                         return nb_bufs;
 477                 rxq->pkt_first_seg = rx_pkts[i];
 478         }
 479         return i + reassemble_packets(rxq, &rx_pkts[i], nb_bufs - i,
 480                 &split_flags[i]);
 481 }
 482
 483 /**
 484  * vPMD receive routine that reassembles scattered packets.
 485  */
 486 uint16_t
 487 i40e_recv_scattered_pkts_vec(void *rx_queue, struct rte_mbuf **rx_pkts,
 488                              uint16_t nb_pkts)
 489 {
 490         uint16_t retval = 0;
 491
 492         while (nb_pkts > RTE_I40E_VPMD_RX_BURST) {
 493                 uint16_t burst;
 494
 495                 burst = i40e_recv_scattered_burst_vec(rx_queue,
 496                                                       rx_pkts + retval,
 497                                                       RTE_I40E_VPMD_RX_BURST);
 498                 retval += burst;
 499                 nb_pkts -= burst;
 500                 if (burst < RTE_I40E_VPMD_RX_BURST)
 501                         return retval;
 502         }
 503
 504         return retval + i40e_recv_scattered_burst_vec(rx_queue,
 505                                                       rx_pkts + retval,
 506                                                       nb_pkts);
 507 }
 508
 509 static inline void
 510 vtx1(volatile struct i40e_tx_desc *txdp,
 511                 struct rte_mbuf *pkt, uint64_t flags)
 512 {
 513         uint64_t high_qw = (I40E_TX_DESC_DTYPE_DATA |
 514                         ((uint64_t)flags  << I40E_TXD_QW1_CMD_SHIFT) |
 515                         ((uint64_t)pkt->data_len << I40E_TXD_QW1_TX_BUF_SZ_SHIFT));
 516
 517         uint64x2_t descriptor = {pkt->buf_iova + pkt->data_off, high_qw};
 518         vst1q_u64((uint64_t *)txdp, descriptor);
 519 }
 520
 521 static inline void
 522 vtx(volatile struct i40e_tx_desc *txdp, struct rte_mbuf **pkt,
 523                 uint16_t nb_pkts,  uint64_t flags)
 524 {
 525         int i;
 526
 527         for (i = 0; i < nb_pkts; ++i, ++txdp, ++pkt)
 528                 vtx1(txdp, *pkt, flags);
 529 }
 530
 531 uint16_t
 532 i40e_xmit_fixed_burst_vec(void *__rte_restrict tx_queue,
 533         struct rte_mbuf **__rte_restrict tx_pkts, uint16_t nb_pkts)
 534 {
 535         struct i40e_tx_queue *txq = (struct i40e_tx_queue *)tx_queue;
 536         volatile struct i40e_tx_desc *txdp;
 537         struct i40e_tx_entry *txep;
 538         uint16_t n, nb_commit, tx_id;
 539         uint64_t flags = I40E_TD_CMD;
 540         uint64_t rs = I40E_TX_DESC_CMD_RS | I40E_TD_CMD;
 541         int i;
 542
 543         /* cross rx_thresh boundary is not allowed */
 544         nb_pkts = RTE_MIN(nb_pkts, txq->tx_rs_thresh);
 545
 546         if (txq->nb_tx_free < txq->tx_free_thresh)
 547                 i40e_tx_free_bufs(txq);
 548
 549         nb_commit = nb_pkts = (uint16_t)RTE_MIN(txq->nb_tx_free, nb_pkts);
 550         if (unlikely(nb_pkts == 0))
 551                 return 0;
 552
 553         tx_id = txq->tx_tail;
 554         txdp = &txq->tx_ring[tx_id];
 555         txep = &txq->sw_ring[tx_id];
 556
 557         txq->nb_tx_free = (uint16_t)(txq->nb_tx_free - nb_pkts);
 558
 559         n = (uint16_t)(txq->nb_tx_desc - tx_id);
 560         if (nb_commit >= n) {
 561                 tx_backlog_entry(txep, tx_pkts, n);
 562
 563                 for (i = 0; i < n - 1; ++i, ++tx_pkts, ++txdp)
 564                         vtx1(txdp, *tx_pkts, flags);
 565
 566                 vtx1(txdp, *tx_pkts++, rs);
 567
 568                 nb_commit = (uint16_t)(nb_commit - n);
 569
 570                 tx_id = 0;
 571                 txq->tx_next_rs = (uint16_t)(txq->tx_rs_thresh - 1);
 572
 573                 /* avoid reach the end of ring */
 574                 txdp = &txq->tx_ring[tx_id];
 575                 txep = &txq->sw_ring[tx_id];
 576         }
 577
 578         tx_backlog_entry(txep, tx_pkts, nb_commit);
 579
 580         vtx(txdp, tx_pkts, nb_commit, flags);
 581
 582         tx_id = (uint16_t)(tx_id + nb_commit);
 583         if (tx_id > txq->tx_next_rs) {
 584                 txq->tx_ring[txq->tx_next_rs].cmd_type_offset_bsz |=
 585                         rte_cpu_to_le_64(((uint64_t)I40E_TX_DESC_CMD_RS) <<
 586                                                 I40E_TXD_QW1_CMD_SHIFT);
 587                 txq->tx_next_rs =
 588                         (uint16_t)(txq->tx_next_rs + txq->tx_rs_thresh);
 589         }
 590
 591         txq->tx_tail = tx_id;
 592
 593         rte_io_wmb();
 594         I40E_PCI_REG_WRITE_RELAXED(txq->qtx_tail, tx_id);
 595
 596         return nb_pkts;
 597 }
 598
 599 void __rte_cold
 600 i40e_rx_queue_release_mbufs_vec(struct i40e_rx_queue *rxq)
 601 {
 602         _i40e_rx_queue_release_mbufs_vec(rxq);
 603 }
 604
 605 int __rte_cold
 606 i40e_rxq_vec_setup(struct i40e_rx_queue *rxq)
 607 {
 608         return i40e_rxq_vec_setup_default(rxq);
 609 }
 610
 611 int __rte_cold
 612 i40e_txq_vec_setup(struct i40e_tx_queue __rte_unused *txq)
 613 {
 614         return 0;
 615 }
 616
 617 int __rte_cold
 618 i40e_rx_vec_dev_conf_condition_check(struct rte_eth_dev *dev)
 619 {
 620         return i40e_rx_vec_dev_conf_condition_check_default(dev);
 621 }