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 <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 #ifndef RTE_LIBRTE_I40E_16BYTE_RX_DESC
  81 /* NEON version of FDIR mark extraction for 4 32B descriptors at a time */
  82 static inline uint32x4_t
  83 descs_to_fdir_32b(volatile union i40e_rx_desc *rxdp, struct rte_mbuf **rx_pkt)
  84 {
  85         /* 32B descriptors: Load 2nd half of descriptors for FDIR ID data */
  86         uint64x2_t desc0_qw23, desc1_qw23, desc2_qw23, desc3_qw23;
  87         desc0_qw23 = vld1q_u64((uint64_t *)&(rxdp + 0)->wb.qword2);
  88         desc1_qw23 = vld1q_u64((uint64_t *)&(rxdp + 1)->wb.qword2);
  89         desc2_qw23 = vld1q_u64((uint64_t *)&(rxdp + 2)->wb.qword2);
  90         desc3_qw23 = vld1q_u64((uint64_t *)&(rxdp + 3)->wb.qword2);
  91
  92         /* FDIR ID data: move last u32 of each desc to 4 u32 lanes */
  93         uint32x4_t v_unpack_02, v_unpack_13;
  94         v_unpack_02 = vzipq_u32(vreinterpretq_u32_u64(desc0_qw23),
  95                                 vreinterpretq_u32_u64(desc2_qw23)).val[1];
  96         v_unpack_13 = vzipq_u32(vreinterpretq_u32_u64(desc1_qw23),
  97                                 vreinterpretq_u32_u64(desc3_qw23)).val[1];
  98         uint32x4_t v_fdir_ids = vzipq_u32(v_unpack_02, v_unpack_13).val[1];
  99
 100         /* Extended Status: extract from each lower 32 bits, to u32 lanes */
 101         v_unpack_02 = vzipq_u32(vreinterpretq_u32_u64(desc0_qw23),
 102                                 vreinterpretq_u32_u64(desc2_qw23)).val[0];
 103         v_unpack_13 = vzipq_u32(vreinterpretq_u32_u64(desc1_qw23),
 104                                 vreinterpretq_u32_u64(desc3_qw23)).val[0];
 105         uint32x4_t v_flt_status = vzipq_u32(v_unpack_02, v_unpack_13).val[0];
 106
 107         /* Shift u32 left and right to "mask away" bits not required.
 108          * Data required is 4:5 (zero based), so left shift by 26 (32-6)
 109          * and then right shift by 30 (32 - 2 bits required).
 110          */
 111         v_flt_status = vshlq_n_u32(v_flt_status, 26);
 112         v_flt_status = vshrq_n_u32(v_flt_status, 30);
 113
 114         /* Generate constant 1 in all u32 lanes */
 115         RTE_BUILD_BUG_ON(I40E_RX_DESC_EXT_STATUS_FLEXBH_FD_ID != 1);
 116         uint32x4_t v_u32_one = vdupq_n_u32(1);
 117
 118         /* Per desc mask, bits set if FDIR ID is valid */
 119         uint32x4_t v_fd_id_mask = vceqq_u32(v_flt_status, v_u32_one);
 120
 121         /* Mask ID data to zero if the FD_ID bit not set in desc */
 122         v_fdir_ids = vandq_u32(v_fdir_ids, v_fd_id_mask);
 123
 124         /* Store data to fdir.hi in mbuf */
 125         rx_pkt[0]->hash.fdir.hi = vgetq_lane_u32(v_fdir_ids, 0);
 126         rx_pkt[1]->hash.fdir.hi = vgetq_lane_u32(v_fdir_ids, 1);
 127         rx_pkt[2]->hash.fdir.hi = vgetq_lane_u32(v_fdir_ids, 2);
 128         rx_pkt[3]->hash.fdir.hi = vgetq_lane_u32(v_fdir_ids, 3);
 129
 130         /* Convert fdir_id_mask into a single bit, then shift as required for
 131          * correct location in the mbuf->olflags
 132          */
 133         RTE_BUILD_BUG_ON(RTE_MBUF_F_RX_FDIR_ID != (1 << 13));
 134         v_fd_id_mask = vshrq_n_u32(v_fd_id_mask, 31);
 135         v_fd_id_mask = vshlq_n_u32(v_fd_id_mask, 13);
 136
 137         /* The returned value must be combined into each mbuf. This is already
 138          * being done for RSS and VLAN mbuf olflags, so return bits to OR in.
 139          */
 140         return v_fd_id_mask;
 141 }
 142
 143 #else /* 32 or 16B FDIR ID handling */
 144
 145 /* Handle 16B descriptor FDIR ID flag setting based on FLM(bit11). See scalar driver
 146  * for scalar implementation of the same functionality.
 147  */
 148 static inline uint32x4_t
 149 descs_to_fdir_16b(uint32x4_t fltstat, uint64x2_t descs[4], struct rte_mbuf **rx_pkt)
 150 {
 151         /* Unpack filter-status data from descriptors */
 152         uint32x4_t v_tmp_02 = vzipq_u32(vreinterpretq_u32_u64(descs[0]),
 153                                         vreinterpretq_u32_u64(descs[2])).val[0];
 154         uint32x4_t v_tmp_13 = vzipq_u32(vreinterpretq_u32_u64(descs[1]),
 155                                         vreinterpretq_u32_u64(descs[3])).val[0];
 156         uint32x4_t v_fdir_ids = vzipq_u32(v_tmp_02, v_tmp_13).val[1];
 157
 158         /* Generate 111 and 11 in each u32 lane */
 159         uint32x4_t v_111_mask = vdupq_n_u32(7);
 160         uint32x4_t v_11_mask = vdupq_n_u32(3);
 161
 162         /* Compare and mask away FDIR ID data if bit not set */
 163         uint32x4_t v_u32_bits = vandq_u32(v_111_mask, fltstat);
 164         uint32x4_t v_fdir_id_mask = vceqq_u32(v_u32_bits, v_11_mask);
 165         v_fdir_ids = vandq_u32(v_fdir_id_mask, v_fdir_ids);
 166
 167         /* Store data to fdir.hi in mbuf */
 168         rx_pkt[0]->hash.fdir.hi = vgetq_lane_u32(v_fdir_ids, 0);
 169         rx_pkt[1]->hash.fdir.hi = vgetq_lane_u32(v_fdir_ids, 1);
 170         rx_pkt[2]->hash.fdir.hi = vgetq_lane_u32(v_fdir_ids, 2);
 171         rx_pkt[3]->hash.fdir.hi = vgetq_lane_u32(v_fdir_ids, 3);
 172
 173         /* Top lane ones mask for FDIR isolation */
 174         uint32x4_t v_desc_fdir_mask = {0, UINT32_MAX, 0, 0};
 175
 176         /* Move fdir_id_mask to correct lane, zero RSS in mbuf if fdir hits */
 177         uint32x4_t v_zeros = {0, 0, 0, 0};
 178         uint32x4_t v_desc3_shift = vextq_u32(v_fdir_id_mask, v_zeros, 2);
 179         uint32x4_t v_desc3_mask = vandq_u32(v_desc_fdir_mask, v_desc3_shift);
 180         descs[3] = vbslq_u32(v_desc3_mask, v_zeros, vreinterpretq_u32_u64(descs[3]));
 181
 182         uint32x4_t v_desc2_shift = vextq_u32(v_fdir_id_mask, v_zeros, 1);
 183         uint32x4_t v_desc2_mask = vandq_u32(v_desc_fdir_mask, v_desc2_shift);
 184         descs[2] = vbslq_u32(v_desc2_mask, v_zeros, vreinterpretq_u32_u64(descs[2]));
 185
 186         uint32x4_t v_desc1_shift = v_fdir_id_mask;
 187         uint32x4_t v_desc1_mask = vandq_u32(v_desc_fdir_mask, v_desc1_shift);
 188         descs[1] = vbslq_u32(v_desc1_mask, v_zeros, vreinterpretq_u32_u64(descs[1]));
 189
 190         uint32x4_t v_desc0_shift = vextq_u32(v_zeros, v_fdir_id_mask, 3);
 191         uint32x4_t v_desc0_mask = vandq_u32(v_desc_fdir_mask, v_desc0_shift);
 192         descs[0] = vbslq_u32(v_desc0_mask, v_zeros, vreinterpretq_u32_u64(descs[0]));
 193
 194         /* Shift to 1 or 0 bit per u32 lane, then to RTE_MBUF_F_RX_FDIR_ID offset */
 195         RTE_BUILD_BUG_ON(RTE_MBUF_F_RX_FDIR_ID != (1 << 13));
 196         uint32x4_t v_mask_one_bit = vshrq_n_u32(v_fdir_id_mask, 31);
 197         return vshlq_n_u32(v_mask_one_bit, 13);
 198 }
 199 #endif
 200
 201 static inline void
 202 desc_to_olflags_v(struct i40e_rx_queue *rxq, volatile union i40e_rx_desc *rxdp,
 203                   uint64x2_t descs[4], struct rte_mbuf **rx_pkts)
 204 {
 205         uint32x4_t vlan0, vlan1, rss, l3_l4e;
 206         const uint64x2_t mbuf_init = {rxq->mbuf_initializer, 0};
 207         uint64x2_t rearm0, rearm1, rearm2, rearm3;
 208
 209         /* mask everything except RSS, flow director and VLAN flags
 210          * bit2 is for VLAN tag, bit11 for flow director indication
 211          * bit13:12 for RSS indication.
 212          */
 213         const uint32x4_t rss_vlan_msk = {
 214                         0x1c03804, 0x1c03804, 0x1c03804, 0x1c03804};
 215
 216         const uint32x4_t cksum_mask = {
 217                         RTE_MBUF_F_RX_IP_CKSUM_GOOD | RTE_MBUF_F_RX_IP_CKSUM_BAD |
 218                         RTE_MBUF_F_RX_L4_CKSUM_GOOD | RTE_MBUF_F_RX_L4_CKSUM_BAD |
 219                         RTE_MBUF_F_RX_OUTER_IP_CKSUM_BAD,
 220                         RTE_MBUF_F_RX_IP_CKSUM_GOOD | RTE_MBUF_F_RX_IP_CKSUM_BAD |
 221                         RTE_MBUF_F_RX_L4_CKSUM_GOOD | RTE_MBUF_F_RX_L4_CKSUM_BAD |
 222                         RTE_MBUF_F_RX_OUTER_IP_CKSUM_BAD,
 223                         RTE_MBUF_F_RX_IP_CKSUM_GOOD | RTE_MBUF_F_RX_IP_CKSUM_BAD |
 224                         RTE_MBUF_F_RX_L4_CKSUM_GOOD | RTE_MBUF_F_RX_L4_CKSUM_BAD |
 225                         RTE_MBUF_F_RX_OUTER_IP_CKSUM_BAD,
 226                         RTE_MBUF_F_RX_IP_CKSUM_GOOD | RTE_MBUF_F_RX_IP_CKSUM_BAD |
 227                         RTE_MBUF_F_RX_L4_CKSUM_GOOD | RTE_MBUF_F_RX_L4_CKSUM_BAD |
 228                         RTE_MBUF_F_RX_OUTER_IP_CKSUM_BAD};
 229
 230         /* map rss and vlan type to rss hash and vlan flag */
 231         const uint8x16_t vlan_flags = {
 232                         0, 0, 0, 0,
 233                         RTE_MBUF_F_RX_VLAN | RTE_MBUF_F_RX_VLAN_STRIPPED, 0, 0, 0,
 234                         0, 0, 0, 0,
 235                         0, 0, 0, 0};
 236
 237         const uint8x16_t rss_flags = {
 238                         0, RTE_MBUF_F_RX_FDIR, 0, 0,
 239                         0, 0, RTE_MBUF_F_RX_RSS_HASH, RTE_MBUF_F_RX_RSS_HASH | RTE_MBUF_F_RX_FDIR,
 240                         0, 0, 0, 0,
 241                         0, 0, 0, 0};
 242
 243         const uint8x16_t l3_l4e_flags = {
 244                         (RTE_MBUF_F_RX_IP_CKSUM_GOOD | RTE_MBUF_F_RX_L4_CKSUM_GOOD) >> 1,
 245                         RTE_MBUF_F_RX_IP_CKSUM_BAD >> 1,
 246                         (RTE_MBUF_F_RX_IP_CKSUM_GOOD | RTE_MBUF_F_RX_L4_CKSUM_BAD) >> 1,
 247                         (RTE_MBUF_F_RX_L4_CKSUM_BAD | RTE_MBUF_F_RX_IP_CKSUM_BAD) >> 1,
 248                         (RTE_MBUF_F_RX_IP_CKSUM_GOOD | RTE_MBUF_F_RX_OUTER_IP_CKSUM_BAD) >> 1,
 249                         (RTE_MBUF_F_RX_OUTER_IP_CKSUM_BAD | RTE_MBUF_F_RX_IP_CKSUM_BAD) >> 1,
 250                         (RTE_MBUF_F_RX_IP_CKSUM_GOOD | RTE_MBUF_F_RX_OUTER_IP_CKSUM_BAD |
 251                          RTE_MBUF_F_RX_L4_CKSUM_BAD) >> 1,
 252                         (RTE_MBUF_F_RX_OUTER_IP_CKSUM_BAD | RTE_MBUF_F_RX_L4_CKSUM_BAD |
 253                          RTE_MBUF_F_RX_IP_CKSUM_BAD) >> 1,
 254                         0, 0, 0, 0, 0, 0, 0, 0};
 255
 256         vlan0 = vzipq_u32(vreinterpretq_u32_u64(descs[0]),
 257                           vreinterpretq_u32_u64(descs[2])).val[1];
 258         vlan1 = vzipq_u32(vreinterpretq_u32_u64(descs[1]),
 259                           vreinterpretq_u32_u64(descs[3])).val[1];
 260         vlan0 = vzipq_u32(vlan0, vlan1).val[0];
 261
 262         vlan1 = vandq_u32(vlan0, rss_vlan_msk);
 263         vlan0 = vreinterpretq_u32_u8(vqtbl1q_u8(vlan_flags,
 264                                                 vreinterpretq_u8_u32(vlan1)));
 265
 266         const uint32x4_t desc_fltstat = vshrq_n_u32(vlan1, 11);
 267         rss = vreinterpretq_u32_u8(vqtbl1q_u8(rss_flags,
 268                                               vreinterpretq_u8_u32(desc_fltstat)));
 269
 270         l3_l4e = vshrq_n_u32(vlan1, 22);
 271         l3_l4e = vreinterpretq_u32_u8(vqtbl1q_u8(l3_l4e_flags,
 272                                               vreinterpretq_u8_u32(l3_l4e)));
 273         /* then we shift left 1 bit */
 274         l3_l4e = vshlq_n_u32(l3_l4e, 1);
 275         /* we need to mask out the redundant bits */
 276         l3_l4e = vandq_u32(l3_l4e, cksum_mask);
 277
 278         vlan0 = vorrq_u32(vlan0, rss);
 279         vlan0 = vorrq_u32(vlan0, l3_l4e);
 280
 281         /* Extract FDIR ID only if FDIR is enabled to avoid useless work */
 282         if (rxq->fdir_enabled) {
 283 #ifndef RTE_LIBRTE_I40E_16BYTE_RX_DESC
 284                 uint32x4_t v_fdir_ol_flags = descs_to_fdir_32b(rxdp, rx_pkts);
 285 #else
 286                 (void)rxdp; /* rxdp not required for 16B desc mode */
 287                 uint32x4_t v_fdir_ol_flags = descs_to_fdir_16b(desc_fltstat, descs, rx_pkts);
 288 #endif
 289                 /* OR in ol_flag bits after descriptor specific extraction */
 290                 vlan0 = vorrq_u32(vlan0, v_fdir_ol_flags);
 291         }
 292
 293         rearm0 = vsetq_lane_u64(vgetq_lane_u32(vlan0, 0), mbuf_init, 1);
 294         rearm1 = vsetq_lane_u64(vgetq_lane_u32(vlan0, 1), mbuf_init, 1);
 295         rearm2 = vsetq_lane_u64(vgetq_lane_u32(vlan0, 2), mbuf_init, 1);
 296         rearm3 = vsetq_lane_u64(vgetq_lane_u32(vlan0, 3), mbuf_init, 1);
 297
 298         vst1q_u64((uint64_t *)&rx_pkts[0]->rearm_data, rearm0);
 299         vst1q_u64((uint64_t *)&rx_pkts[1]->rearm_data, rearm1);
 300         vst1q_u64((uint64_t *)&rx_pkts[2]->rearm_data, rearm2);
 301         vst1q_u64((uint64_t *)&rx_pkts[3]->rearm_data, rearm3);
 302 }
 303
 304 #define PKTLEN_SHIFT     10
 305 #define I40E_UINT16_BIT (CHAR_BIT * sizeof(uint16_t))
 306
 307 static inline void
 308 desc_to_ptype_v(uint64x2_t descs[4], struct rte_mbuf **__rte_restrict rx_pkts,
 309                 uint32_t *__rte_restrict ptype_tbl)
 310 {
 311         int i;
 312         uint8_t ptype;
 313         uint8x16_t tmp;
 314
 315         for (i = 0; i < 4; i++) {
 316                 tmp = vreinterpretq_u8_u64(vshrq_n_u64(descs[i], 30));
 317                 ptype = vgetq_lane_u8(tmp, 8);
 318                 rx_pkts[i]->packet_type = ptype_tbl[ptype];
 319         }
 320
 321 }
 322
 323 /**
 324  * vPMD raw receive routine, only accept(nb_pkts >= RTE_I40E_DESCS_PER_LOOP)
 325  *
 326  * Notice:
 327  * - nb_pkts < RTE_I40E_DESCS_PER_LOOP, just return no packet
 328  * - floor align nb_pkts to a RTE_I40E_DESCS_PER_LOOP power-of-two
 329  */
 330 static inline uint16_t
 331 _recv_raw_pkts_vec(struct i40e_rx_queue *__rte_restrict rxq,
 332                    struct rte_mbuf **__rte_restrict rx_pkts,
 333                    uint16_t nb_pkts, uint8_t *split_packet)
 334 {
 335         volatile union i40e_rx_desc *rxdp;
 336         struct i40e_rx_entry *sw_ring;
 337         uint16_t nb_pkts_recd;
 338         int pos;
 339         uint32_t *ptype_tbl = rxq->vsi->adapter->ptype_tbl;
 340
 341         /* mask to shuffle from desc. to mbuf */
 342         uint8x16_t shuf_msk = {
 343                 0xFF, 0xFF,   /* pkt_type set as unknown */
 344                 0xFF, 0xFF,   /* pkt_type set as unknown */
 345                 14, 15,       /* octet 15~14, low 16 bits pkt_len */
 346                 0xFF, 0xFF,   /* skip high 16 bits pkt_len, zero out */
 347                 14, 15,       /* octet 15~14, 16 bits data_len */
 348                 2, 3,         /* octet 2~3, low 16 bits vlan_macip */
 349                 4, 5, 6, 7    /* octet 4~7, 32bits rss */
 350                 };
 351
 352         uint8x16_t eop_check = {
 353                 0x02, 0x00, 0x02, 0x00,
 354                 0x02, 0x00, 0x02, 0x00,
 355                 0x00, 0x00, 0x00, 0x00,
 356                 0x00, 0x00, 0x00, 0x00
 357                 };
 358
 359         uint16x8_t crc_adjust = {
 360                 0, 0,         /* ignore pkt_type field */
 361                 rxq->crc_len, /* sub crc on pkt_len */
 362                 0,            /* ignore high-16bits of pkt_len */
 363                 rxq->crc_len, /* sub crc on data_len */
 364                 0, 0, 0       /* ignore non-length fields */
 365                 };
 366
 367         /* nb_pkts has to be floor-aligned to RTE_I40E_DESCS_PER_LOOP */
 368         nb_pkts = RTE_ALIGN_FLOOR(nb_pkts, RTE_I40E_DESCS_PER_LOOP);
 369
 370         /* Just the act of getting into the function from the application is
 371          * going to cost about 7 cycles
 372          */
 373         rxdp = rxq->rx_ring + rxq->rx_tail;
 374
 375         rte_prefetch_non_temporal(rxdp);
 376
 377         /* See if we need to rearm the RX queue - gives the prefetch a bit
 378          * of time to act
 379          */
 380         if (rxq->rxrearm_nb > RTE_I40E_RXQ_REARM_THRESH)
 381                 i40e_rxq_rearm(rxq);
 382
 383         /* Before we start moving massive data around, check to see if
 384          * there is actually a packet available
 385          */
 386         if (!(rxdp->wb.qword1.status_error_len &
 387                         rte_cpu_to_le_32(1 << I40E_RX_DESC_STATUS_DD_SHIFT)))
 388                 return 0;
 389
 390         /* Cache is empty -> need to scan the buffer rings, but first move
 391          * the next 'n' mbufs into the cache
 392          */
 393         sw_ring = &rxq->sw_ring[rxq->rx_tail];
 394
 395         /* A. load 4 packet in one loop
 396          * [A*. mask out 4 unused dirty field in desc]
 397          * B. copy 4 mbuf point from swring to rx_pkts
 398          * C. calc the number of DD bits among the 4 packets
 399          * [C*. extract the end-of-packet bit, if requested]
 400          * D. fill info. from desc to mbuf
 401          */
 402
 403         for (pos = 0, nb_pkts_recd = 0; pos < nb_pkts;
 404                         pos += RTE_I40E_DESCS_PER_LOOP,
 405                         rxdp += RTE_I40E_DESCS_PER_LOOP) {
 406                 uint64x2_t descs[RTE_I40E_DESCS_PER_LOOP];
 407                 uint8x16_t pkt_mb1, pkt_mb2, pkt_mb3, pkt_mb4;
 408                 uint16x8x2_t sterr_tmp1, sterr_tmp2;
 409                 uint64x2_t mbp1, mbp2;
 410                 uint16x8_t staterr;
 411                 uint16x8_t tmp;
 412                 uint64_t stat;
 413
 414                 int32x4_t len_shl = {0, 0, 0, PKTLEN_SHIFT};
 415
 416                 /* A.1 load desc[3-0] */
 417                 descs[3] =  vld1q_u64((uint64_t *)(rxdp + 3));
 418                 descs[2] =  vld1q_u64((uint64_t *)(rxdp + 2));
 419                 descs[1] =  vld1q_u64((uint64_t *)(rxdp + 1));
 420                 descs[0] =  vld1q_u64((uint64_t *)(rxdp));
 421
 422                 /* Use acquire fence to order loads of descriptor qwords */
 423                 rte_atomic_thread_fence(__ATOMIC_ACQUIRE);
 424                 /* A.2 reload qword0 to make it ordered after qword1 load */
 425                 descs[3] = vld1q_lane_u64((uint64_t *)(rxdp + 3), descs[3], 0);
 426                 descs[2] = vld1q_lane_u64((uint64_t *)(rxdp + 2), descs[2], 0);
 427                 descs[1] = vld1q_lane_u64((uint64_t *)(rxdp + 1), descs[1], 0);
 428                 descs[0] = vld1q_lane_u64((uint64_t *)(rxdp), descs[0], 0);
 429
 430                 /* B.1 load 4 mbuf point */
 431                 mbp1 = vld1q_u64((uint64_t *)&sw_ring[pos]);
 432                 mbp2 = vld1q_u64((uint64_t *)&sw_ring[pos + 2]);
 433
 434                 /* B.2 copy 4 mbuf point into rx_pkts  */
 435                 vst1q_u64((uint64_t *)&rx_pkts[pos], mbp1);
 436                 vst1q_u64((uint64_t *)&rx_pkts[pos + 2], mbp2);
 437
 438                 if (split_packet) {
 439                         rte_mbuf_prefetch_part2(rx_pkts[pos]);
 440                         rte_mbuf_prefetch_part2(rx_pkts[pos + 1]);
 441                         rte_mbuf_prefetch_part2(rx_pkts[pos + 2]);
 442                         rte_mbuf_prefetch_part2(rx_pkts[pos + 3]);
 443                 }
 444
 445                 /* pkts shift the pktlen field to be 16-bit aligned*/
 446                 uint32x4_t len3 = vshlq_u32(vreinterpretq_u32_u64(descs[3]),
 447                                             len_shl);
 448                 descs[3] = vreinterpretq_u64_u16(vsetq_lane_u16
 449                                 (vgetq_lane_u16(vreinterpretq_u16_u32(len3), 7),
 450                                  vreinterpretq_u16_u64(descs[3]),
 451                                  7));
 452                 uint32x4_t len2 = vshlq_u32(vreinterpretq_u32_u64(descs[2]),
 453                                             len_shl);
 454                 descs[2] = vreinterpretq_u64_u16(vsetq_lane_u16
 455                                 (vgetq_lane_u16(vreinterpretq_u16_u32(len2), 7),
 456                                  vreinterpretq_u16_u64(descs[2]),
 457                                  7));
 458                 uint32x4_t len1 = vshlq_u32(vreinterpretq_u32_u64(descs[1]),
 459                                             len_shl);
 460                 descs[1] = vreinterpretq_u64_u16(vsetq_lane_u16
 461                                 (vgetq_lane_u16(vreinterpretq_u16_u32(len1), 7),
 462                                  vreinterpretq_u16_u64(descs[1]),
 463                                  7));
 464                 uint32x4_t len0 = vshlq_u32(vreinterpretq_u32_u64(descs[0]),
 465                                             len_shl);
 466                 descs[0] = vreinterpretq_u64_u16(vsetq_lane_u16
 467                                 (vgetq_lane_u16(vreinterpretq_u16_u32(len0), 7),
 468                                  vreinterpretq_u16_u64(descs[0]),
 469                                  7));
 470
 471                 desc_to_olflags_v(rxq, rxdp, descs, &rx_pkts[pos]);
 472
 473                 /* D.1 pkts convert format from desc to pktmbuf */
 474                 pkt_mb4 = vqtbl1q_u8(vreinterpretq_u8_u64(descs[3]), shuf_msk);
 475                 pkt_mb3 = vqtbl1q_u8(vreinterpretq_u8_u64(descs[2]), shuf_msk);
 476                 pkt_mb2 = vqtbl1q_u8(vreinterpretq_u8_u64(descs[1]), shuf_msk);
 477                 pkt_mb1 = vqtbl1q_u8(vreinterpretq_u8_u64(descs[0]), shuf_msk);
 478
 479                 /* D.2 pkts set in_port/nb_seg and remove crc */
 480                 tmp = vsubq_u16(vreinterpretq_u16_u8(pkt_mb4), crc_adjust);
 481                 pkt_mb4 = vreinterpretq_u8_u16(tmp);
 482                 tmp = vsubq_u16(vreinterpretq_u16_u8(pkt_mb3), crc_adjust);
 483                 pkt_mb3 = vreinterpretq_u8_u16(tmp);
 484                 tmp = vsubq_u16(vreinterpretq_u16_u8(pkt_mb2), crc_adjust);
 485                 pkt_mb2 = vreinterpretq_u8_u16(tmp);
 486                 tmp = vsubq_u16(vreinterpretq_u16_u8(pkt_mb1), crc_adjust);
 487                 pkt_mb1 = vreinterpretq_u8_u16(tmp);
 488
 489                 /* D.3 copy final data to rx_pkts */
 490                 vst1q_u8((void *)&rx_pkts[pos + 3]->rx_descriptor_fields1,
 491                                 pkt_mb4);
 492                 vst1q_u8((void *)&rx_pkts[pos + 2]->rx_descriptor_fields1,
 493                                 pkt_mb3);
 494                 vst1q_u8((void *)&rx_pkts[pos + 1]->rx_descriptor_fields1,
 495                                 pkt_mb2);
 496                 vst1q_u8((void *)&rx_pkts[pos]->rx_descriptor_fields1,
 497                                 pkt_mb1);
 498
 499                 desc_to_ptype_v(descs, &rx_pkts[pos], ptype_tbl);
 500
 501                 if (likely(pos + RTE_I40E_DESCS_PER_LOOP < nb_pkts)) {
 502                         rte_prefetch_non_temporal(rxdp + RTE_I40E_DESCS_PER_LOOP);
 503                 }
 504
 505                 /* C.1 4=>2 filter staterr info only */
 506                 sterr_tmp2 = vzipq_u16(vreinterpretq_u16_u64(descs[1]),
 507                                        vreinterpretq_u16_u64(descs[3]));
 508                 sterr_tmp1 = vzipq_u16(vreinterpretq_u16_u64(descs[0]),
 509                                        vreinterpretq_u16_u64(descs[2]));
 510
 511                 /* C.2 get 4 pkts staterr value  */
 512                 staterr = vzipq_u16(sterr_tmp1.val[1],
 513                                     sterr_tmp2.val[1]).val[0];
 514
 515                 /* C* extract and record EOP bit */
 516                 if (split_packet) {
 517                         uint8x16_t eop_shuf_mask = {
 518                                         0x00, 0x02, 0x04, 0x06,
 519                                         0xFF, 0xFF, 0xFF, 0xFF,
 520                                         0xFF, 0xFF, 0xFF, 0xFF,
 521                                         0xFF, 0xFF, 0xFF, 0xFF};
 522                         uint8x16_t eop_bits;
 523
 524                         /* and with mask to extract bits, flipping 1-0 */
 525                         eop_bits = vmvnq_u8(vreinterpretq_u8_u16(staterr));
 526                         eop_bits = vandq_u8(eop_bits, eop_check);
 527                         /* the staterr values are not in order, as the count
 528                          * of dd bits doesn't care. However, for end of
 529                          * packet tracking, we do care, so shuffle. This also
 530                          * compresses the 32-bit values to 8-bit
 531                          */
 532                         eop_bits = vqtbl1q_u8(eop_bits, eop_shuf_mask);
 533
 534                         /* store the resulting 32-bit value */
 535                         vst1q_lane_u32((uint32_t *)split_packet,
 536                                        vreinterpretq_u32_u8(eop_bits), 0);
 537                         split_packet += RTE_I40E_DESCS_PER_LOOP;
 538
 539                         /* zero-out next pointers */
 540                         rx_pkts[pos]->next = NULL;
 541                         rx_pkts[pos + 1]->next = NULL;
 542                         rx_pkts[pos + 2]->next = NULL;
 543                         rx_pkts[pos + 3]->next = NULL;
 544                 }
 545
 546                 staterr = vshlq_n_u16(staterr, I40E_UINT16_BIT - 1);
 547                 staterr = vreinterpretq_u16_s16(
 548                                 vshrq_n_s16(vreinterpretq_s16_u16(staterr),
 549                                             I40E_UINT16_BIT - 1));
 550                 stat = ~vgetq_lane_u64(vreinterpretq_u64_u16(staterr), 0);
 551
 552                 /* C.4 calc available number of desc */
 553                 if (unlikely(stat == 0)) {
 554                         nb_pkts_recd += RTE_I40E_DESCS_PER_LOOP;
 555                 } else {
 556                         nb_pkts_recd += __builtin_ctzl(stat) / I40E_UINT16_BIT;
 557                         break;
 558                 }
 559         }
 560
 561         /* Update our internal tail pointer */
 562         rxq->rx_tail = (uint16_t)(rxq->rx_tail + nb_pkts_recd);
 563         rxq->rx_tail = (uint16_t)(rxq->rx_tail & (rxq->nb_rx_desc - 1));
 564         rxq->rxrearm_nb = (uint16_t)(rxq->rxrearm_nb + nb_pkts_recd);
 565
 566         return nb_pkts_recd;
 567 }
 568
 569  /*
 570  * Notice:
 571  * - nb_pkts < RTE_I40E_DESCS_PER_LOOP, just return no packet
 572  * - nb_pkts > RTE_I40E_VPMD_RX_BURST, only scan RTE_I40E_VPMD_RX_BURST
 573  *   numbers of DD bits
 574  */
 575 uint16_t
 576 i40e_recv_pkts_vec(void *__rte_restrict rx_queue,
 577                 struct rte_mbuf **__rte_restrict rx_pkts, uint16_t nb_pkts)
 578 {
 579         return _recv_raw_pkts_vec(rx_queue, rx_pkts, nb_pkts, NULL);
 580 }
 581
 582 /**
 583  * vPMD receive routine that reassembles single burst of 32 scattered packets
 584  *
 585  * Notice:
 586  * - nb_pkts < RTE_I40E_DESCS_PER_LOOP, just return no packet
 587  */
 588 static uint16_t
 589 i40e_recv_scattered_burst_vec(void *rx_queue, struct rte_mbuf **rx_pkts,
 590                               uint16_t nb_pkts)
 591 {
 592
 593         struct i40e_rx_queue *rxq = rx_queue;
 594         uint8_t split_flags[RTE_I40E_VPMD_RX_BURST] = {0};
 595
 596         /* get some new buffers */
 597         uint16_t nb_bufs = _recv_raw_pkts_vec(rxq, rx_pkts, nb_pkts,
 598                         split_flags);
 599         if (nb_bufs == 0)
 600                 return 0;
 601
 602         /* happy day case, full burst + no packets to be joined */
 603         const uint64_t *split_fl64 = (uint64_t *)split_flags;
 604
 605         if (rxq->pkt_first_seg == NULL &&
 606                         split_fl64[0] == 0 && split_fl64[1] == 0 &&
 607                         split_fl64[2] == 0 && split_fl64[3] == 0)
 608                 return nb_bufs;
 609
 610         /* reassemble any packets that need reassembly*/
 611         unsigned i = 0;
 612
 613         if (rxq->pkt_first_seg == NULL) {
 614                 /* find the first split flag, and only reassemble then*/
 615                 while (i < nb_bufs && !split_flags[i])
 616                         i++;
 617                 if (i == nb_bufs)
 618                         return nb_bufs;
 619                 rxq->pkt_first_seg = rx_pkts[i];
 620         }
 621         return i + reassemble_packets(rxq, &rx_pkts[i], nb_bufs - i,
 622                 &split_flags[i]);
 623 }
 624
 625 /**
 626  * vPMD receive routine that reassembles scattered packets.
 627  */
 628 uint16_t
 629 i40e_recv_scattered_pkts_vec(void *rx_queue, struct rte_mbuf **rx_pkts,
 630                              uint16_t nb_pkts)
 631 {
 632         uint16_t retval = 0;
 633
 634         while (nb_pkts > RTE_I40E_VPMD_RX_BURST) {
 635                 uint16_t burst;
 636
 637                 burst = i40e_recv_scattered_burst_vec(rx_queue,
 638                                                       rx_pkts + retval,
 639                                                       RTE_I40E_VPMD_RX_BURST);
 640                 retval += burst;
 641                 nb_pkts -= burst;
 642                 if (burst < RTE_I40E_VPMD_RX_BURST)
 643                         return retval;
 644         }
 645
 646         return retval + i40e_recv_scattered_burst_vec(rx_queue,
 647                                                       rx_pkts + retval,
 648                                                       nb_pkts);
 649 }
 650
 651 static inline void
 652 vtx1(volatile struct i40e_tx_desc *txdp,
 653                 struct rte_mbuf *pkt, uint64_t flags)
 654 {
 655         uint64_t high_qw = (I40E_TX_DESC_DTYPE_DATA |
 656                         ((uint64_t)flags  << I40E_TXD_QW1_CMD_SHIFT) |
 657                         ((uint64_t)pkt->data_len << I40E_TXD_QW1_TX_BUF_SZ_SHIFT));
 658
 659         uint64x2_t descriptor = {pkt->buf_iova + pkt->data_off, high_qw};
 660         vst1q_u64((uint64_t *)txdp, descriptor);
 661 }
 662
 663 static inline void
 664 vtx(volatile struct i40e_tx_desc *txdp, struct rte_mbuf **pkt,
 665                 uint16_t nb_pkts,  uint64_t flags)
 666 {
 667         int i;
 668
 669         for (i = 0; i < nb_pkts; ++i, ++txdp, ++pkt)
 670                 vtx1(txdp, *pkt, flags);
 671 }
 672
 673 uint16_t
 674 i40e_xmit_fixed_burst_vec(void *__rte_restrict tx_queue,
 675         struct rte_mbuf **__rte_restrict tx_pkts, uint16_t nb_pkts)
 676 {
 677         struct i40e_tx_queue *txq = (struct i40e_tx_queue *)tx_queue;
 678         volatile struct i40e_tx_desc *txdp;
 679         struct i40e_tx_entry *txep;
 680         uint16_t n, nb_commit, tx_id;
 681         uint64_t flags = I40E_TD_CMD;
 682         uint64_t rs = I40E_TX_DESC_CMD_RS | I40E_TD_CMD;
 683         int i;
 684
 685         /* cross rx_thresh boundary is not allowed */
 686         nb_pkts = RTE_MIN(nb_pkts, txq->tx_rs_thresh);
 687
 688         if (txq->nb_tx_free < txq->tx_free_thresh)
 689                 i40e_tx_free_bufs(txq);
 690
 691         nb_commit = nb_pkts = (uint16_t)RTE_MIN(txq->nb_tx_free, nb_pkts);
 692         if (unlikely(nb_pkts == 0))
 693                 return 0;
 694
 695         tx_id = txq->tx_tail;
 696         txdp = &txq->tx_ring[tx_id];
 697         txep = &txq->sw_ring[tx_id];
 698
 699         txq->nb_tx_free = (uint16_t)(txq->nb_tx_free - nb_pkts);
 700
 701         n = (uint16_t)(txq->nb_tx_desc - tx_id);
 702         if (nb_commit >= n) {
 703                 tx_backlog_entry(txep, tx_pkts, n);
 704
 705                 for (i = 0; i < n - 1; ++i, ++tx_pkts, ++txdp)
 706                         vtx1(txdp, *tx_pkts, flags);
 707
 708                 vtx1(txdp, *tx_pkts++, rs);
 709
 710                 nb_commit = (uint16_t)(nb_commit - n);
 711
 712                 tx_id = 0;
 713                 txq->tx_next_rs = (uint16_t)(txq->tx_rs_thresh - 1);
 714
 715                 /* avoid reach the end of ring */
 716                 txdp = &txq->tx_ring[tx_id];
 717                 txep = &txq->sw_ring[tx_id];
 718         }
 719
 720         tx_backlog_entry(txep, tx_pkts, nb_commit);
 721
 722         vtx(txdp, tx_pkts, nb_commit, flags);
 723
 724         tx_id = (uint16_t)(tx_id + nb_commit);
 725         if (tx_id > txq->tx_next_rs) {
 726                 txq->tx_ring[txq->tx_next_rs].cmd_type_offset_bsz |=
 727                         rte_cpu_to_le_64(((uint64_t)I40E_TX_DESC_CMD_RS) <<
 728                                                 I40E_TXD_QW1_CMD_SHIFT);
 729                 txq->tx_next_rs =
 730                         (uint16_t)(txq->tx_next_rs + txq->tx_rs_thresh);
 731         }
 732
 733         txq->tx_tail = tx_id;
 734
 735         rte_io_wmb();
 736         I40E_PCI_REG_WRITE_RELAXED(txq->qtx_tail, tx_id);
 737
 738         return nb_pkts;
 739 }
 740
 741 void __rte_cold
 742 i40e_rx_queue_release_mbufs_vec(struct i40e_rx_queue *rxq)
 743 {
 744         _i40e_rx_queue_release_mbufs_vec(rxq);
 745 }
 746
 747 int __rte_cold
 748 i40e_rxq_vec_setup(struct i40e_rx_queue *rxq)
 749 {
 750         return i40e_rxq_vec_setup_default(rxq);
 751 }
 752
 753 int __rte_cold
 754 i40e_txq_vec_setup(struct i40e_tx_queue __rte_unused *txq)
 755 {
 756         return 0;
 757 }
 758
 759 int __rte_cold
 760 i40e_rx_vec_dev_conf_condition_check(struct rte_eth_dev *dev)
 761 {
 762         return i40e_rx_vec_dev_conf_condition_check_default(dev);
 763 }