drivers/net/i40e/i40e_rxtx_vec_common.h

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2010-2015 Intel Corporation
   3  */
   4
   5 #ifndef _I40E_RXTX_VEC_COMMON_H_
   6 #define _I40E_RXTX_VEC_COMMON_H_
   7 #include <stdint.h>
   8 #include <ethdev_driver.h>
   9 #include <rte_malloc.h>
  10
  11 #include "i40e_ethdev.h"
  12 #include "i40e_rxtx.h"
  13
  14 #ifndef __INTEL_COMPILER
  15 #pragma GCC diagnostic ignored "-Wcast-qual"
  16 #endif
  17
  18 static inline uint16_t
  19 reassemble_packets(struct i40e_rx_queue *rxq, struct rte_mbuf **rx_bufs,
  20                    uint16_t nb_bufs, uint8_t *split_flags)
  21 {
  22         struct rte_mbuf *pkts[RTE_I40E_VPMD_RX_BURST]; /*finished pkts*/
  23         struct rte_mbuf *start = rxq->pkt_first_seg;
  24         struct rte_mbuf *end =  rxq->pkt_last_seg;
  25         unsigned pkt_idx, buf_idx;
  26
  27         for (buf_idx = 0, pkt_idx = 0; buf_idx < nb_bufs; buf_idx++) {
  28                 if (end != NULL) {
  29                         /* processing a split packet */
  30                         end->next = rx_bufs[buf_idx];
  31                         rx_bufs[buf_idx]->data_len += rxq->crc_len;
  32
  33                         start->nb_segs++;
  34                         start->pkt_len += rx_bufs[buf_idx]->data_len;
  35                         end = end->next;
  36
  37                         if (!split_flags[buf_idx]) {
  38                                 /* it's the last packet of the set */
  39                                 start->hash = end->hash;
  40                                 start->vlan_tci = end->vlan_tci;
  41                                 start->ol_flags = end->ol_flags;
  42                                 /* we need to strip crc for the whole packet */
  43                                 start->pkt_len -= rxq->crc_len;
  44                                 if (end->data_len > rxq->crc_len)
  45                                         end->data_len -= rxq->crc_len;
  46                                 else {
  47                                         /* free up last mbuf */
  48                                         struct rte_mbuf *secondlast = start;
  49
  50                                         start->nb_segs--;
  51                                         while (secondlast->next != end)
  52                                                 secondlast = secondlast->next;
  53                                         secondlast->data_len -= (rxq->crc_len -
  54                                                         end->data_len);
  55                                         secondlast->next = NULL;
  56                                         rte_pktmbuf_free_seg(end);
  57                                 }
  58                                 pkts[pkt_idx++] = start;
  59                                 start = end = NULL;
  60                         }
  61                 } else {
  62                         /* not processing a split packet */
  63                         if (!split_flags[buf_idx]) {
  64                                 /* not a split packet, save and skip */
  65                                 pkts[pkt_idx++] = rx_bufs[buf_idx];
  66                                 continue;
  67                         }
  68                         end = start = rx_bufs[buf_idx];
  69                         rx_bufs[buf_idx]->data_len += rxq->crc_len;
  70                         rx_bufs[buf_idx]->pkt_len += rxq->crc_len;
  71                 }
  72         }
  73
  74         /* save the partial packet for next time */
  75         rxq->pkt_first_seg = start;
  76         rxq->pkt_last_seg = end;
  77         memcpy(rx_bufs, pkts, pkt_idx * (sizeof(*pkts)));
  78         return pkt_idx;
  79 }
  80
  81 static __rte_always_inline int
  82 i40e_tx_free_bufs(struct i40e_tx_queue *txq)
  83 {
  84         struct i40e_tx_entry *txep;
  85         uint32_t n;
  86         uint32_t i;
  87         int nb_free = 0;
  88         struct rte_mbuf *m, *free[RTE_I40E_TX_MAX_FREE_BUF_SZ];
  89
  90         /* check DD bits on threshold descriptor */
  91         if ((txq->tx_ring[txq->tx_next_dd].cmd_type_offset_bsz &
  92                         rte_cpu_to_le_64(I40E_TXD_QW1_DTYPE_MASK)) !=
  93                         rte_cpu_to_le_64(I40E_TX_DESC_DTYPE_DESC_DONE))
  94                 return 0;
  95
  96         n = txq->tx_rs_thresh;
  97
  98          /* first buffer to free from S/W ring is at index
  99           * tx_next_dd - (tx_rs_thresh-1)
 100           */
 101         txep = &txq->sw_ring[txq->tx_next_dd - (n - 1)];
 102
 103         if (txq->offloads & RTE_ETH_TX_OFFLOAD_MBUF_FAST_FREE) {
 104                 for (i = 0; i < n; i++) {
 105                         free[i] = txep[i].mbuf;
 106                         /* no need to reset txep[i].mbuf in vector path */
 107                 }
 108                 rte_mempool_put_bulk(free[0]->pool, (void **)free, n);
 109                 goto done;
 110         }
 111
 112         m = rte_pktmbuf_prefree_seg(txep[0].mbuf);
 113         if (likely(m != NULL)) {
 114                 free[0] = m;
 115                 nb_free = 1;
 116                 for (i = 1; i < n; i++) {
 117                         m = rte_pktmbuf_prefree_seg(txep[i].mbuf);
 118                         if (likely(m != NULL)) {
 119                                 if (likely(m->pool == free[0]->pool)) {
 120                                         free[nb_free++] = m;
 121                                 } else {
 122                                         rte_mempool_put_bulk(free[0]->pool,
 123                                                              (void *)free,
 124                                                              nb_free);
 125                                         free[0] = m;
 126                                         nb_free = 1;
 127                                 }
 128                         }
 129                 }
 130                 rte_mempool_put_bulk(free[0]->pool, (void **)free, nb_free);
 131         } else {
 132                 for (i = 1; i < n; i++) {
 133                         m = rte_pktmbuf_prefree_seg(txep[i].mbuf);
 134                         if (m != NULL)
 135                                 rte_mempool_put(m->pool, m);
 136                 }
 137         }
 138
 139 done:
 140         /* buffers were freed, update counters */
 141         txq->nb_tx_free = (uint16_t)(txq->nb_tx_free + txq->tx_rs_thresh);
 142         txq->tx_next_dd = (uint16_t)(txq->tx_next_dd + txq->tx_rs_thresh);
 143         if (txq->tx_next_dd >= txq->nb_tx_desc)
 144                 txq->tx_next_dd = (uint16_t)(txq->tx_rs_thresh - 1);
 145
 146         return txq->tx_rs_thresh;
 147 }
 148
 149 static __rte_always_inline void
 150 tx_backlog_entry(struct i40e_tx_entry *txep,
 151                  struct rte_mbuf **tx_pkts, uint16_t nb_pkts)
 152 {
 153         int i;
 154
 155         for (i = 0; i < (int)nb_pkts; ++i)
 156                 txep[i].mbuf = tx_pkts[i];
 157 }
 158
 159 static inline void
 160 _i40e_rx_queue_release_mbufs_vec(struct i40e_rx_queue *rxq)
 161 {
 162         const unsigned mask = rxq->nb_rx_desc - 1;
 163         unsigned i;
 164
 165         if (rxq->sw_ring == NULL || rxq->rxrearm_nb >= rxq->nb_rx_desc)
 166                 return;
 167
 168         /* free all mbufs that are valid in the ring */
 169         if (rxq->rxrearm_nb == 0) {
 170                 for (i = 0; i < rxq->nb_rx_desc; i++) {
 171                         if (rxq->sw_ring[i].mbuf != NULL)
 172                                 rte_pktmbuf_free_seg(rxq->sw_ring[i].mbuf);
 173                 }
 174         } else {
 175                 for (i = rxq->rx_tail;
 176                      i != rxq->rxrearm_start;
 177                      i = (i + 1) & mask) {
 178                         if (rxq->sw_ring[i].mbuf != NULL)
 179                                 rte_pktmbuf_free_seg(rxq->sw_ring[i].mbuf);
 180                 }
 181         }
 182
 183         rxq->rxrearm_nb = rxq->nb_rx_desc;
 184
 185         /* set all entries to NULL */
 186         memset(rxq->sw_ring, 0, sizeof(rxq->sw_ring[0]) * rxq->nb_rx_desc);
 187 }
 188
 189 static inline int
 190 i40e_rxq_vec_setup_default(struct i40e_rx_queue *rxq)
 191 {
 192         uintptr_t p;
 193         struct rte_mbuf mb_def = { .buf_addr = 0 }; /* zeroed mbuf */
 194
 195         mb_def.nb_segs = 1;
 196         mb_def.data_off = RTE_PKTMBUF_HEADROOM;
 197         mb_def.port = rxq->port_id;
 198         rte_mbuf_refcnt_set(&mb_def, 1);
 199
 200         /* prevent compiler reordering: rearm_data covers previous fields */
 201         rte_compiler_barrier();
 202         p = (uintptr_t)&mb_def.rearm_data;
 203         rxq->mbuf_initializer = *(uint64_t *)p;
 204         return 0;
 205 }
 206
 207 static inline int
 208 i40e_rx_vec_dev_conf_condition_check_default(struct rte_eth_dev *dev)
 209 {
 210 #ifndef RTE_LIBRTE_IEEE1588
 211         struct i40e_adapter *ad =
 212                 I40E_DEV_PRIVATE_TO_ADAPTER(dev->data->dev_private);
 213         struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
 214         struct rte_eth_fdir_conf *fconf = &dev->data->dev_conf.fdir_conf;
 215         struct i40e_rx_queue *rxq;
 216         uint16_t desc, i;
 217         bool first_queue;
 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 & RTE_ETH_RX_OFFLOAD_HEADER_SPLIT)
 225                 return -1;
 226
 227         /* no QinQ support */
 228         if (rxmode->offloads & RTE_ETH_RX_OFFLOAD_VLAN_EXTEND)
 229                 return -1;
 230
 231         /**
 232          * Vector mode is allowed only when number of Rx queue
 233          * descriptor is power of 2.
 234          */
 235         if (!dev->data->dev_started) {
 236                 first_queue = true;
 237                 for (i = 0; i < dev->data->nb_rx_queues; i++) {
 238                         rxq = dev->data->rx_queues[i];
 239                         if (!rxq)
 240                                 continue;
 241                         desc = rxq->nb_rx_desc;
 242                         if (first_queue)
 243                                 ad->rx_vec_allowed =
 244                                         rte_is_power_of_2(desc);
 245                         else
 246                                 ad->rx_vec_allowed =
 247                                         ad->rx_vec_allowed ?
 248                                         rte_is_power_of_2(desc) :
 249                                         ad->rx_vec_allowed;
 250                         first_queue = false;
 251                 }
 252         } else {
 253                 /* Only check the first queue's descriptor number */
 254                 for (i = 0; i < dev->data->nb_rx_queues; i++) {
 255                         rxq = dev->data->rx_queues[i];
 256                         if (!rxq)
 257                                 continue;
 258                         desc = rxq->nb_rx_desc;
 259                         ad->rx_vec_allowed = rte_is_power_of_2(desc);
 260                         break;
 261                 }
 262         }
 263
 264         return 0;
 265 #else
 266         RTE_SET_USED(dev);
 267         return -1;
 268 #endif
 269 }
 270
 271 #endif