drivers/net/ice/ice_rxtx_vec_common.h

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2019 Intel Corporation
   3  */
   4
   5 #ifndef _ICE_RXTX_VEC_COMMON_H_
   6 #define _ICE_RXTX_VEC_COMMON_H_
   7
   8 #include "ice_rxtx.h"
   9
  10 static inline uint16_t
  11 ice_rx_reassemble_packets(struct ice_rx_queue *rxq, struct rte_mbuf **rx_bufs,
  12                           uint16_t nb_bufs, uint8_t *split_flags)
  13 {
  14         struct rte_mbuf *pkts[ICE_VPMD_RX_BURST] = {0}; /*finished pkts*/
  15         struct rte_mbuf *start = rxq->pkt_first_seg;
  16         struct rte_mbuf *end =  rxq->pkt_last_seg;
  17         unsigned int pkt_idx, buf_idx;
  18
  19         for (buf_idx = 0, pkt_idx = 0; buf_idx < nb_bufs; buf_idx++) {
  20                 if (end) {
  21                         /* processing a split packet */
  22                         end->next = rx_bufs[buf_idx];
  23                         rx_bufs[buf_idx]->data_len += rxq->crc_len;
  24
  25                         start->nb_segs++;
  26                         start->pkt_len += rx_bufs[buf_idx]->data_len;
  27                         end = end->next;
  28
  29                         if (!split_flags[buf_idx]) {
  30                                 /* it's the last packet of the set */
  31                                 start->hash = end->hash;
  32                                 start->ol_flags = end->ol_flags;
  33                                 /* we need to strip crc for the whole packet */
  34                                 start->pkt_len -= rxq->crc_len;
  35                                 if (end->data_len > rxq->crc_len) {
  36                                         end->data_len -= rxq->crc_len;
  37                                 } else {
  38                                         /* free up last mbuf */
  39                                         struct rte_mbuf *secondlast = start;
  40
  41                                         start->nb_segs--;
  42                                         while (secondlast->next != end)
  43                                                 secondlast = secondlast->next;
  44                                         secondlast->data_len -= (rxq->crc_len -
  45                                                         end->data_len);
  46                                         secondlast->next = NULL;
  47                                         rte_pktmbuf_free_seg(end);
  48                                 }
  49                                 pkts[pkt_idx++] = start;
  50                                 start = NULL;
  51                                 end = NULL;
  52                         }
  53                 } else {
  54                         /* not processing a split packet */
  55                         if (!split_flags[buf_idx]) {
  56                                 /* not a split packet, save and skip */
  57                                 pkts[pkt_idx++] = rx_bufs[buf_idx];
  58                                 continue;
  59                         }
  60                         start = rx_bufs[buf_idx];
  61                         end = start;
  62                         rx_bufs[buf_idx]->data_len += rxq->crc_len;
  63                         rx_bufs[buf_idx]->pkt_len += rxq->crc_len;
  64                 }
  65         }
  66
  67         /* save the partial packet for next time */
  68         rxq->pkt_first_seg = start;
  69         rxq->pkt_last_seg = end;
  70         rte_memcpy(rx_bufs, pkts, pkt_idx * (sizeof(*pkts)));
  71         return pkt_idx;
  72 }
  73
  74 static __rte_always_inline int
  75 ice_tx_free_bufs(struct ice_tx_queue *txq)
  76 {
  77         struct ice_tx_entry *txep;
  78         uint32_t n;
  79         uint32_t i;
  80         int nb_free = 0;
  81         struct rte_mbuf *m, *free[ICE_TX_MAX_FREE_BUF_SZ];
  82
  83         /* check DD bits on threshold descriptor */
  84         if ((txq->tx_ring[txq->tx_next_dd].cmd_type_offset_bsz &
  85                         rte_cpu_to_le_64(ICE_TXD_QW1_DTYPE_M)) !=
  86                         rte_cpu_to_le_64(ICE_TX_DESC_DTYPE_DESC_DONE))
  87                 return 0;
  88
  89         n = txq->tx_rs_thresh;
  90
  91          /* first buffer to free from S/W ring is at index
  92           * tx_next_dd - (tx_rs_thresh-1)
  93           */
  94         txep = &txq->sw_ring[txq->tx_next_dd - (n - 1)];
  95         m = rte_pktmbuf_prefree_seg(txep[0].mbuf);
  96         if (likely(m)) {
  97                 free[0] = m;
  98                 nb_free = 1;
  99                 for (i = 1; i < n; i++) {
 100                         m = rte_pktmbuf_prefree_seg(txep[i].mbuf);
 101                         if (likely(m)) {
 102                                 if (likely(m->pool == free[0]->pool)) {
 103                                         free[nb_free++] = m;
 104                                 } else {
 105                                         rte_mempool_put_bulk(free[0]->pool,
 106                                                              (void *)free,
 107                                                              nb_free);
 108                                         free[0] = m;
 109                                         nb_free = 1;
 110                                 }
 111                         }
 112                 }
 113                 rte_mempool_put_bulk(free[0]->pool, (void **)free, nb_free);
 114         } else {
 115                 for (i = 1; i < n; i++) {
 116                         m = rte_pktmbuf_prefree_seg(txep[i].mbuf);
 117                         if (m)
 118                                 rte_mempool_put(m->pool, m);
 119                 }
 120         }
 121
 122         /* buffers were freed, update counters */
 123         txq->nb_tx_free = (uint16_t)(txq->nb_tx_free + txq->tx_rs_thresh);
 124         txq->tx_next_dd = (uint16_t)(txq->tx_next_dd + txq->tx_rs_thresh);
 125         if (txq->tx_next_dd >= txq->nb_tx_desc)
 126                 txq->tx_next_dd = (uint16_t)(txq->tx_rs_thresh - 1);
 127
 128         return txq->tx_rs_thresh;
 129 }
 130
 131 static __rte_always_inline void
 132 ice_tx_backlog_entry(struct ice_tx_entry *txep,
 133                      struct rte_mbuf **tx_pkts, uint16_t nb_pkts)
 134 {
 135         int i;
 136
 137         for (i = 0; i < (int)nb_pkts; ++i)
 138                 txep[i].mbuf = tx_pkts[i];
 139 }
 140
 141 static inline void
 142 _ice_rx_queue_release_mbufs_vec(struct ice_rx_queue *rxq)
 143 {
 144         const unsigned int mask = rxq->nb_rx_desc - 1;
 145         unsigned int i;
 146
 147         if (unlikely(!rxq->sw_ring)) {
 148                 PMD_DRV_LOG(DEBUG, "sw_ring is NULL");
 149                 return;
 150         }
 151
 152         if (rxq->rxrearm_nb >= rxq->nb_rx_desc)
 153                 return;
 154
 155         /* free all mbufs that are valid in the ring */
 156         if (rxq->rxrearm_nb == 0) {
 157                 for (i = 0; i < rxq->nb_rx_desc; i++) {
 158                         if (rxq->sw_ring[i].mbuf)
 159                                 rte_pktmbuf_free_seg(rxq->sw_ring[i].mbuf);
 160                 }
 161         } else {
 162                 for (i = rxq->rx_tail;
 163                      i != rxq->rxrearm_start;
 164                      i = (i + 1) & mask) {
 165                         if (rxq->sw_ring[i].mbuf)
 166                                 rte_pktmbuf_free_seg(rxq->sw_ring[i].mbuf);
 167                 }
 168         }
 169
 170         rxq->rxrearm_nb = rxq->nb_rx_desc;
 171
 172         /* set all entries to NULL */
 173         memset(rxq->sw_ring, 0, sizeof(rxq->sw_ring[0]) * rxq->nb_rx_desc);
 174 }
 175
 176 static inline void
 177 _ice_tx_queue_release_mbufs_vec(struct ice_tx_queue *txq)
 178 {
 179         uint16_t i;
 180
 181         if (unlikely(!txq || !txq->sw_ring)) {
 182                 PMD_DRV_LOG(DEBUG, "Pointer to rxq or sw_ring is NULL");
 183                 return;
 184         }
 185
 186         /**
 187          *  vPMD tx will not set sw_ring's mbuf to NULL after free,
 188          *  so need to free remains more carefully.
 189          */
 190         i = txq->tx_next_dd - txq->tx_rs_thresh + 1;
 191         if (txq->tx_tail < i) {
 192                 for (; i < txq->nb_tx_desc; i++) {
 193                         rte_pktmbuf_free_seg(txq->sw_ring[i].mbuf);
 194                         txq->sw_ring[i].mbuf = NULL;
 195                 }
 196                 i = 0;
 197         }
 198         for (; i < txq->tx_tail; i++) {
 199                 rte_pktmbuf_free_seg(txq->sw_ring[i].mbuf);
 200                 txq->sw_ring[i].mbuf = NULL;
 201         }
 202 }
 203
 204 static inline int
 205 ice_rxq_vec_setup_default(struct ice_rx_queue *rxq)
 206 {
 207         uintptr_t p;
 208         struct rte_mbuf mb_def = { .buf_addr = 0 }; /* zeroed mbuf */
 209
 210         mb_def.nb_segs = 1;
 211         mb_def.data_off = RTE_PKTMBUF_HEADROOM;
 212         mb_def.port = rxq->port_id;
 213         rte_mbuf_refcnt_set(&mb_def, 1);
 214
 215         /* prevent compiler reordering: rearm_data covers previous fields */
 216         rte_compiler_barrier();
 217         p = (uintptr_t)&mb_def.rearm_data;
 218         rxq->mbuf_initializer = *(uint64_t *)p;
 219         return 0;
 220 }
 221
 222 static inline int
 223 ice_rx_vec_queue_default(struct ice_rx_queue *rxq)
 224 {
 225         if (!rxq)
 226                 return -1;
 227
 228         if (!rte_is_power_of_2(rxq->nb_rx_desc))
 229                 return -1;
 230
 231         if (rxq->rx_free_thresh < ICE_VPMD_RX_BURST)
 232                 return -1;
 233
 234         if (rxq->nb_rx_desc % rxq->rx_free_thresh)
 235                 return -1;
 236
 237         return 0;
 238 }
 239
 240 #define ICE_NO_VECTOR_FLAGS (                            \
 241                 DEV_TX_OFFLOAD_MULTI_SEGS |              \
 242                 DEV_TX_OFFLOAD_VLAN_INSERT |             \
 243                 DEV_TX_OFFLOAD_SCTP_CKSUM |              \
 244                 DEV_TX_OFFLOAD_UDP_CKSUM |               \
 245                 DEV_TX_OFFLOAD_TCP_CKSUM)
 246
 247 static inline int
 248 ice_tx_vec_queue_default(struct ice_tx_queue *txq)
 249 {
 250         if (!txq)
 251                 return -1;
 252
 253         if (txq->offloads & ICE_NO_VECTOR_FLAGS)
 254                 return -1;
 255
 256         if (txq->tx_rs_thresh < ICE_VPMD_TX_BURST ||
 257             txq->tx_rs_thresh > ICE_TX_MAX_FREE_BUF_SZ)
 258                 return -1;
 259
 260         return 0;
 261 }
 262
 263 static inline int
 264 ice_rx_vec_dev_check_default(struct rte_eth_dev *dev)
 265 {
 266         int i;
 267         struct ice_rx_queue *rxq;
 268
 269         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 270                 rxq = dev->data->rx_queues[i];
 271                 if (ice_rx_vec_queue_default(rxq))
 272                         return -1;
 273         }
 274
 275         return 0;
 276 }
 277
 278 static inline int
 279 ice_tx_vec_dev_check_default(struct rte_eth_dev *dev)
 280 {
 281         int i;
 282         struct ice_tx_queue *txq;
 283
 284         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 285                 txq = dev->data->tx_queues[i];
 286                 if (ice_tx_vec_queue_default(txq))
 287                         return -1;
 288         }
 289
 290         return 0;
 291 }
 292
 293 #endif