drivers/net/hns3/hns3_rxtx_vec.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2020-2021 HiSilicon Limited.
   3  */
   4
   5 #include <rte_io.h>
   6 #include <ethdev_driver.h>
   7
   8 #include "hns3_ethdev.h"
   9 #include "hns3_rxtx.h"
  10 #include "hns3_rxtx_vec.h"
  11
  12 #if defined RTE_ARCH_ARM64
  13 #include "hns3_rxtx_vec_neon.h"
  14 #endif
  15
  16 int
  17 hns3_tx_check_vec_support(struct rte_eth_dev *dev)
  18 {
  19         struct rte_eth_txmode *txmode = &dev->data->dev_conf.txmode;
  20
  21         struct hns3_hw *hw = HNS3_DEV_PRIVATE_TO_HW(dev->data->dev_private);
  22         if (hns3_dev_ptp_supported(hw))
  23                 return -ENOTSUP;
  24
  25         /* Only support DEV_TX_OFFLOAD_MBUF_FAST_FREE */
  26         if (txmode->offloads != DEV_TX_OFFLOAD_MBUF_FAST_FREE)
  27                 return -ENOTSUP;
  28
  29         return 0;
  30 }
  31
  32 uint16_t
  33 hns3_xmit_pkts_vec(void *tx_queue, struct rte_mbuf **tx_pkts, uint16_t nb_pkts)
  34 {
  35         struct hns3_tx_queue *txq = (struct hns3_tx_queue *)tx_queue;
  36         uint16_t nb_tx = 0;
  37
  38         while (nb_pkts) {
  39                 uint16_t ret, new_burst;
  40
  41                 new_burst = RTE_MIN(nb_pkts, txq->tx_rs_thresh);
  42                 ret = hns3_xmit_fixed_burst_vec(tx_queue, &tx_pkts[nb_tx],
  43                                                 new_burst);
  44                 nb_tx += ret;
  45                 nb_pkts -= ret;
  46                 if (ret < new_burst)
  47                         break;
  48         }
  49
  50         return nb_tx;
  51 }
  52
  53 static inline void
  54 hns3_rxq_rearm_mbuf(struct hns3_rx_queue *rxq)
  55 {
  56 #define REARM_LOOP_STEP_NUM     4
  57         struct hns3_entry *rxep = &rxq->sw_ring[rxq->rx_rearm_start];
  58         struct hns3_desc *rxdp = rxq->rx_ring + rxq->rx_rearm_start;
  59         uint64_t dma_addr;
  60         int i;
  61
  62         if (unlikely(rte_mempool_get_bulk(rxq->mb_pool, (void *)rxep,
  63                                           HNS3_DEFAULT_RXQ_REARM_THRESH) < 0)) {
  64                 rte_eth_devices[rxq->port_id].data->rx_mbuf_alloc_failed++;
  65                 return;
  66         }
  67
  68         for (i = 0; i < HNS3_DEFAULT_RXQ_REARM_THRESH; i += REARM_LOOP_STEP_NUM,
  69                 rxep += REARM_LOOP_STEP_NUM, rxdp += REARM_LOOP_STEP_NUM) {
  70                 if (likely(i <
  71                         HNS3_DEFAULT_RXQ_REARM_THRESH - REARM_LOOP_STEP_NUM)) {
  72                         rte_prefetch_non_temporal(rxep[4].mbuf);
  73                         rte_prefetch_non_temporal(rxep[5].mbuf);
  74                         rte_prefetch_non_temporal(rxep[6].mbuf);
  75                         rte_prefetch_non_temporal(rxep[7].mbuf);
  76                 }
  77
  78                 dma_addr = rte_mbuf_data_iova_default(rxep[0].mbuf);
  79                 rxdp[0].addr = rte_cpu_to_le_64(dma_addr);
  80                 rxdp[0].rx.bd_base_info = 0;
  81
  82                 dma_addr = rte_mbuf_data_iova_default(rxep[1].mbuf);
  83                 rxdp[1].addr = rte_cpu_to_le_64(dma_addr);
  84                 rxdp[1].rx.bd_base_info = 0;
  85
  86                 dma_addr = rte_mbuf_data_iova_default(rxep[2].mbuf);
  87                 rxdp[2].addr = rte_cpu_to_le_64(dma_addr);
  88                 rxdp[2].rx.bd_base_info = 0;
  89
  90                 dma_addr = rte_mbuf_data_iova_default(rxep[3].mbuf);
  91                 rxdp[3].addr = rte_cpu_to_le_64(dma_addr);
  92                 rxdp[3].rx.bd_base_info = 0;
  93         }
  94
  95         rxq->rx_rearm_start += HNS3_DEFAULT_RXQ_REARM_THRESH;
  96         if (rxq->rx_rearm_start >= rxq->nb_rx_desc)
  97                 rxq->rx_rearm_start = 0;
  98
  99         rxq->rx_rearm_nb -= HNS3_DEFAULT_RXQ_REARM_THRESH;
 100
 101         hns3_write_reg_opt(rxq->io_head_reg, HNS3_DEFAULT_RXQ_REARM_THRESH);
 102 }
 103
 104 uint16_t
 105 hns3_recv_pkts_vec(void *__restrict rx_queue,
 106                    struct rte_mbuf **__restrict rx_pkts,
 107                    uint16_t nb_pkts)
 108 {
 109         struct hns3_rx_queue *rxq = rx_queue;
 110         struct hns3_desc *rxdp = &rxq->rx_ring[rxq->next_to_use];
 111         uint64_t pkt_err_mask;  /* bit mask indicate whick pkts is error */
 112         uint16_t nb_rx;
 113
 114         rte_prefetch_non_temporal(rxdp);
 115
 116         nb_pkts = RTE_ALIGN_FLOOR(nb_pkts, HNS3_DEFAULT_DESCS_PER_LOOP);
 117
 118         if (rxq->rx_rearm_nb > HNS3_DEFAULT_RXQ_REARM_THRESH)
 119                 hns3_rxq_rearm_mbuf(rxq);
 120
 121         if (unlikely(!(rxdp->rx.bd_base_info &
 122                         rte_cpu_to_le_32(1u << HNS3_RXD_VLD_B))))
 123                 return 0;
 124
 125         rte_prefetch0(rxq->sw_ring[rxq->next_to_use + 0].mbuf);
 126         rte_prefetch0(rxq->sw_ring[rxq->next_to_use + 1].mbuf);
 127         rte_prefetch0(rxq->sw_ring[rxq->next_to_use + 2].mbuf);
 128         rte_prefetch0(rxq->sw_ring[rxq->next_to_use + 3].mbuf);
 129
 130         if (likely(nb_pkts <= HNS3_DEFAULT_RX_BURST)) {
 131                 pkt_err_mask = 0;
 132                 nb_rx = hns3_recv_burst_vec(rxq, rx_pkts, nb_pkts,
 133                                             &pkt_err_mask);
 134                 nb_rx = hns3_rx_reassemble_pkts(rx_pkts, nb_rx, pkt_err_mask);
 135                 return nb_rx;
 136         }
 137
 138         nb_rx = 0;
 139         while (nb_pkts > 0) {
 140                 uint16_t ret, n;
 141
 142                 n = RTE_MIN(nb_pkts, HNS3_DEFAULT_RX_BURST);
 143                 pkt_err_mask = 0;
 144                 ret = hns3_recv_burst_vec(rxq, &rx_pkts[nb_rx], n,
 145                                           &pkt_err_mask);
 146                 nb_pkts -= ret;
 147                 nb_rx += hns3_rx_reassemble_pkts(&rx_pkts[nb_rx], ret,
 148                                                  pkt_err_mask);
 149                 if (ret < n)
 150                         break;
 151
 152                 if (rxq->rx_rearm_nb > HNS3_DEFAULT_RXQ_REARM_THRESH)
 153                         hns3_rxq_rearm_mbuf(rxq);
 154         }
 155
 156         return nb_rx;
 157 }
 158
 159 static void
 160 hns3_rxq_vec_setup_rearm_data(struct hns3_rx_queue *rxq)
 161 {
 162         uintptr_t p;
 163         struct rte_mbuf mb_def = { .buf_addr = 0 }; /* zeroed mbuf */
 164
 165         mb_def.nb_segs = 1;
 166         mb_def.data_off = RTE_PKTMBUF_HEADROOM;
 167         mb_def.port = rxq->port_id;
 168         rte_mbuf_refcnt_set(&mb_def, 1);
 169
 170         /* compile-time verifies the rearm_data first 8bytes */
 171         RTE_BUILD_BUG_ON(offsetof(struct rte_mbuf, data_off) <
 172                          offsetof(struct rte_mbuf, rearm_data));
 173         RTE_BUILD_BUG_ON(offsetof(struct rte_mbuf, refcnt) <
 174                          offsetof(struct rte_mbuf, rearm_data));
 175         RTE_BUILD_BUG_ON(offsetof(struct rte_mbuf, nb_segs) <
 176                          offsetof(struct rte_mbuf, rearm_data));
 177         RTE_BUILD_BUG_ON(offsetof(struct rte_mbuf, port) <
 178                          offsetof(struct rte_mbuf, rearm_data));
 179         RTE_BUILD_BUG_ON(offsetof(struct rte_mbuf, data_off) -
 180                          offsetof(struct rte_mbuf, rearm_data) > 6);
 181         RTE_BUILD_BUG_ON(offsetof(struct rte_mbuf, refcnt) -
 182                          offsetof(struct rte_mbuf, rearm_data) > 6);
 183         RTE_BUILD_BUG_ON(offsetof(struct rte_mbuf, nb_segs) -
 184                          offsetof(struct rte_mbuf, rearm_data) > 6);
 185         RTE_BUILD_BUG_ON(offsetof(struct rte_mbuf, port) -
 186                          offsetof(struct rte_mbuf, rearm_data) > 6);
 187
 188         /* prevent compiler reordering: rearm_data covers previous fields */
 189         rte_compiler_barrier();
 190         p = (uintptr_t)&mb_def.rearm_data;
 191         rxq->mbuf_initializer = *(uint64_t *)p;
 192 }
 193
 194 void
 195 hns3_rxq_vec_setup(struct hns3_rx_queue *rxq)
 196 {
 197         struct hns3_entry *sw_ring = &rxq->sw_ring[rxq->nb_rx_desc];
 198         unsigned int i;
 199
 200         memset(&rxq->rx_ring[rxq->nb_rx_desc], 0,
 201                 sizeof(struct hns3_desc) * HNS3_DEFAULT_RX_BURST);
 202
 203         memset(&rxq->fake_mbuf, 0, sizeof(rxq->fake_mbuf));
 204         for (i = 0; i < HNS3_DEFAULT_RX_BURST; i++)
 205                 sw_ring[i].mbuf = &rxq->fake_mbuf;
 206
 207         hns3_rxq_vec_setup_rearm_data(rxq);
 208
 209         memset(rxq->offset_table, 0, sizeof(rxq->offset_table));
 210 }
 211
 212 static int
 213 hns3_rxq_vec_check(struct hns3_rx_queue *rxq, void *arg)
 214 {
 215         uint32_t min_vec_bds = HNS3_DEFAULT_RXQ_REARM_THRESH +
 216                                 HNS3_DEFAULT_RX_BURST;
 217
 218         if (rxq->nb_rx_desc < min_vec_bds)
 219                 return -ENOTSUP;
 220
 221         if (rxq->nb_rx_desc % HNS3_DEFAULT_RXQ_REARM_THRESH)
 222                 return -ENOTSUP;
 223
 224         RTE_SET_USED(arg);
 225         return 0;
 226 }
 227
 228 int
 229 hns3_rx_check_vec_support(struct rte_eth_dev *dev)
 230 {
 231         struct rte_fdir_conf *fconf = &dev->data->dev_conf.fdir_conf;
 232         struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
 233         uint64_t offloads_mask = DEV_RX_OFFLOAD_TCP_LRO |
 234                                  DEV_RX_OFFLOAD_VLAN;
 235
 236         struct hns3_hw *hw = HNS3_DEV_PRIVATE_TO_HW(dev->data->dev_private);
 237         if (hns3_dev_ptp_supported(hw))
 238                 return -ENOTSUP;
 239
 240         if (dev->data->scattered_rx)
 241                 return -ENOTSUP;
 242
 243         if (fconf->mode != RTE_FDIR_MODE_NONE)
 244                 return -ENOTSUP;
 245
 246         if (rxmode->offloads & offloads_mask)
 247                 return -ENOTSUP;
 248
 249         if (hns3_rxq_iterate(dev, hns3_rxq_vec_check, NULL) != 0)
 250                 return -ENOTSUP;
 251
 252         return 0;
 253 }