ceph/src/seastar/dpdk/drivers/net/i40e/i40e_rxtx_vec_common.h

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  *   Copyright(c) 2010-2015 Intel Corporation. All rights reserved.
   5  *   All rights reserved.
   6  *
   7  *   Redistribution and use in source and binary forms, with or without
   8  *   modification, are permitted provided that the following conditions
   9  *   are met:
  10  *
  11  *     * Redistributions of source code must retain the above copyright
  12  *       notice, this list of conditions and the following disclaimer.
  13  *     * Redistributions in binary form must reproduce the above copyright
  14  *       notice, this list of conditions and the following disclaimer in
  15  *       the documentation and/or other materials provided with the
  16  *       distribution.
  17  *     * Neither the name of Intel Corporation nor the names of its
  18  *       contributors may be used to endorse or promote products derived
  19  *       from this software without specific prior written permission.
  20  *
  21  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  24  *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  25  *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  26  *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  27  *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  28  *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  29  *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  30  *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  31  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  */
  33
  34 #ifndef _I40E_RXTX_VEC_COMMON_H_
  35 #define _I40E_RXTX_VEC_COMMON_H_
  36 #include <stdint.h>
  37 #include <rte_ethdev.h>
  38 #include <rte_malloc.h>
  39
  40 #include "i40e_ethdev.h"
  41 #include "i40e_rxtx.h"
  42
  43 static inline uint16_t
  44 reassemble_packets(struct i40e_rx_queue *rxq, struct rte_mbuf **rx_bufs,
  45                    uint16_t nb_bufs, uint8_t *split_flags)
  46 {
  47         struct rte_mbuf *pkts[RTE_I40E_VPMD_RX_BURST]; /*finished pkts*/
  48         struct rte_mbuf *start = rxq->pkt_first_seg;
  49         struct rte_mbuf *end =  rxq->pkt_last_seg;
  50         unsigned pkt_idx, buf_idx;
  51
  52         for (buf_idx = 0, pkt_idx = 0; buf_idx < nb_bufs; buf_idx++) {
  53                 if (end != NULL) {
  54                         /* processing a split packet */
  55                         end->next = rx_bufs[buf_idx];
  56                         rx_bufs[buf_idx]->data_len += rxq->crc_len;
  57
  58                         start->nb_segs++;
  59                         start->pkt_len += rx_bufs[buf_idx]->data_len;
  60                         end = end->next;
  61
  62                         if (!split_flags[buf_idx]) {
  63                                 /* it's the last packet of the set */
  64                                 start->hash = end->hash;
  65                                 start->ol_flags = end->ol_flags;
  66                                 /* we need to strip crc for the whole packet */
  67                                 start->pkt_len -= rxq->crc_len;
  68                                 if (end->data_len > rxq->crc_len)
  69                                         end->data_len -= rxq->crc_len;
  70                                 else {
  71                                         /* free up last mbuf */
  72                                         struct rte_mbuf *secondlast = start;
  73
  74                                         start->nb_segs--;
  75                                         while (secondlast->next != end)
  76                                                 secondlast = secondlast->next;
  77                                         secondlast->data_len -= (rxq->crc_len -
  78                                                         end->data_len);
  79                                         secondlast->next = NULL;
  80                                         rte_pktmbuf_free_seg(end);
  81                                 }
  82                                 pkts[pkt_idx++] = start;
  83                                 start = end = NULL;
  84                         }
  85                 } else {
  86                         /* not processing a split packet */
  87                         if (!split_flags[buf_idx]) {
  88                                 /* not a split packet, save and skip */
  89                                 pkts[pkt_idx++] = rx_bufs[buf_idx];
  90                                 continue;
  91                         }
  92                         end = start = rx_bufs[buf_idx];
  93                         rx_bufs[buf_idx]->data_len += rxq->crc_len;
  94                         rx_bufs[buf_idx]->pkt_len += rxq->crc_len;
  95                 }
  96         }
  97
  98         /* save the partial packet for next time */
  99         rxq->pkt_first_seg = start;
 100         rxq->pkt_last_seg = end;
 101         memcpy(rx_bufs, pkts, pkt_idx * (sizeof(*pkts)));
 102         return pkt_idx;
 103 }
 104
 105 static inline int __attribute__((always_inline))
 106 i40e_tx_free_bufs(struct i40e_tx_queue *txq)
 107 {
 108         struct i40e_tx_entry *txep;
 109         uint32_t n;
 110         uint32_t i;
 111         int nb_free = 0;
 112         struct rte_mbuf *m, *free[RTE_I40E_TX_MAX_FREE_BUF_SZ];
 113
 114         /* check DD bits on threshold descriptor */
 115         if ((txq->tx_ring[txq->tx_next_dd].cmd_type_offset_bsz &
 116                         rte_cpu_to_le_64(I40E_TXD_QW1_DTYPE_MASK)) !=
 117                         rte_cpu_to_le_64(I40E_TX_DESC_DTYPE_DESC_DONE))
 118                 return 0;
 119
 120         n = txq->tx_rs_thresh;
 121
 122          /* first buffer to free from S/W ring is at index
 123           * tx_next_dd - (tx_rs_thresh-1)
 124           */
 125         txep = &txq->sw_ring[txq->tx_next_dd - (n - 1)];
 126         m = rte_pktmbuf_prefree_seg(txep[0].mbuf);
 127         if (likely(m != NULL)) {
 128                 free[0] = m;
 129                 nb_free = 1;
 130                 for (i = 1; i < n; i++) {
 131                         m = rte_pktmbuf_prefree_seg(txep[i].mbuf);
 132                         if (likely(m != NULL)) {
 133                                 if (likely(m->pool == free[0]->pool)) {
 134                                         free[nb_free++] = m;
 135                                 } else {
 136                                         rte_mempool_put_bulk(free[0]->pool,
 137                                                              (void *)free,
 138                                                              nb_free);
 139                                         free[0] = m;
 140                                         nb_free = 1;
 141                                 }
 142                         }
 143                 }
 144                 rte_mempool_put_bulk(free[0]->pool, (void **)free, nb_free);
 145         } else {
 146                 for (i = 1; i < n; i++) {
 147                         m = rte_pktmbuf_prefree_seg(txep[i].mbuf);
 148                         if (m != NULL)
 149                                 rte_mempool_put(m->pool, m);
 150                 }
 151         }
 152
 153         /* buffers were freed, update counters */
 154         txq->nb_tx_free = (uint16_t)(txq->nb_tx_free + txq->tx_rs_thresh);
 155         txq->tx_next_dd = (uint16_t)(txq->tx_next_dd + txq->tx_rs_thresh);
 156         if (txq->tx_next_dd >= txq->nb_tx_desc)
 157                 txq->tx_next_dd = (uint16_t)(txq->tx_rs_thresh - 1);
 158
 159         return txq->tx_rs_thresh;
 160 }
 161
 162 static inline void __attribute__((always_inline))
 163 tx_backlog_entry(struct i40e_tx_entry *txep,
 164                  struct rte_mbuf **tx_pkts, uint16_t nb_pkts)
 165 {
 166         int i;
 167
 168         for (i = 0; i < (int)nb_pkts; ++i)
 169                 txep[i].mbuf = tx_pkts[i];
 170 }
 171
 172 static inline void
 173 _i40e_rx_queue_release_mbufs_vec(struct i40e_rx_queue *rxq)
 174 {
 175         const unsigned mask = rxq->nb_rx_desc - 1;
 176         unsigned i;
 177
 178         if (rxq->sw_ring == NULL || rxq->rxrearm_nb >= rxq->nb_rx_desc)
 179                 return;
 180
 181         /* free all mbufs that are valid in the ring */
 182         if (rxq->rxrearm_nb == 0) {
 183                 for (i = 0; i < rxq->nb_rx_desc; i++) {
 184                         if (rxq->sw_ring[i].mbuf != NULL)
 185                                 rte_pktmbuf_free_seg(rxq->sw_ring[i].mbuf);
 186                 }
 187         } else {
 188                 for (i = rxq->rx_tail;
 189                      i != rxq->rxrearm_start;
 190                      i = (i + 1) & mask) {
 191                         if (rxq->sw_ring[i].mbuf != NULL)
 192                                 rte_pktmbuf_free_seg(rxq->sw_ring[i].mbuf);
 193                 }
 194         }
 195
 196         rxq->rxrearm_nb = rxq->nb_rx_desc;
 197
 198         /* set all entries to NULL */
 199         memset(rxq->sw_ring, 0, sizeof(rxq->sw_ring[0]) * rxq->nb_rx_desc);
 200 }
 201
 202 static inline int
 203 i40e_rxq_vec_setup_default(struct i40e_rx_queue *rxq)
 204 {
 205         uintptr_t p;
 206         struct rte_mbuf mb_def = { .buf_addr = 0 }; /* zeroed mbuf */
 207
 208         mb_def.nb_segs = 1;
 209         mb_def.data_off = RTE_PKTMBUF_HEADROOM;
 210         mb_def.port = rxq->port_id;
 211         rte_mbuf_refcnt_set(&mb_def, 1);
 212
 213         /* prevent compiler reordering: rearm_data covers previous fields */
 214         rte_compiler_barrier();
 215         p = (uintptr_t)&mb_def.rearm_data;
 216         rxq->mbuf_initializer = *(uint64_t *)p;
 217         return 0;
 218 }
 219
 220 static inline int
 221 i40e_rx_vec_dev_conf_condition_check_default(struct rte_eth_dev *dev)
 222 {
 223 #ifndef RTE_LIBRTE_IEEE1588
 224         struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
 225         struct rte_fdir_conf *fconf = &dev->data->dev_conf.fdir_conf;
 226
 227         /* no fdir support */
 228         if (fconf->mode != RTE_FDIR_MODE_NONE)
 229                 return -1;
 230
 231          /* - no csum error report support
 232          * - no header split support
 233          */
 234         if (rxmode->header_split == 1)
 235                 return -1;
 236
 237         /* no QinQ support */
 238         if (rxmode->hw_vlan_extend == 1)
 239                 return -1;
 240
 241         return 0;
 242 #else
 243         RTE_SET_USED(dev);
 244         return -1;
 245 #endif
 246 }
 247 #endif