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->vlan_tci = end->vlan_tci;
  33                                 start->ol_flags = end->ol_flags;
  34                                 /* we need to strip crc for the whole packet */
  35                                 start->pkt_len -= rxq->crc_len;
  36                                 if (end->data_len > rxq->crc_len) {
  37                                         end->data_len -= rxq->crc_len;
  38                                 } else {
  39                                         /* free up last mbuf */
  40                                         struct rte_mbuf *secondlast = start;
  41
  42                                         start->nb_segs--;
  43                                         while (secondlast->next != end)
  44                                                 secondlast = secondlast->next;
  45                                         secondlast->data_len -= (rxq->crc_len -
  46                                                         end->data_len);
  47                                         secondlast->next = NULL;
  48                                         rte_pktmbuf_free_seg(end);
  49                                 }
  50                                 pkts[pkt_idx++] = start;
  51                                 start = NULL;
  52                                 end = NULL;
  53                         }
  54                 } else {
  55                         /* not processing a split packet */
  56                         if (!split_flags[buf_idx]) {
  57                                 /* not a split packet, save and skip */
  58                                 pkts[pkt_idx++] = rx_bufs[buf_idx];
  59                                 continue;
  60                         }
  61                         start = rx_bufs[buf_idx];
  62                         end = start;
  63                         rx_bufs[buf_idx]->data_len += rxq->crc_len;
  64                         rx_bufs[buf_idx]->pkt_len += rxq->crc_len;
  65                 }
  66         }
  67
  68         /* save the partial packet for next time */
  69         rxq->pkt_first_seg = start;
  70         rxq->pkt_last_seg = end;
  71         rte_memcpy(rx_bufs, pkts, pkt_idx * (sizeof(*pkts)));
  72         return pkt_idx;
  73 }
  74
  75 static __rte_always_inline int
  76 ice_tx_free_bufs(struct ice_tx_queue *txq)
  77 {
  78         struct ice_tx_entry *txep;
  79         uint32_t n;
  80         uint32_t i;
  81         int nb_free = 0;
  82         struct rte_mbuf *m, *free[ICE_TX_MAX_FREE_BUF_SZ];
  83
  84         /* check DD bits on threshold descriptor */
  85         if ((txq->tx_ring[txq->tx_next_dd].cmd_type_offset_bsz &
  86                         rte_cpu_to_le_64(ICE_TXD_QW1_DTYPE_M)) !=
  87                         rte_cpu_to_le_64(ICE_TX_DESC_DTYPE_DESC_DONE))
  88                 return 0;
  89
  90         n = txq->tx_rs_thresh;
  91
  92          /* first buffer to free from S/W ring is at index
  93           * tx_next_dd - (tx_rs_thresh-1)
  94           */
  95         txep = &txq->sw_ring[txq->tx_next_dd - (n - 1)];
  96         m = rte_pktmbuf_prefree_seg(txep[0].mbuf);
  97         if (likely(m)) {
  98                 free[0] = m;
  99                 nb_free = 1;
 100                 for (i = 1; i < n; i++) {
 101                         m = rte_pktmbuf_prefree_seg(txep[i].mbuf);
 102                         if (likely(m)) {
 103                                 if (likely(m->pool == free[0]->pool)) {
 104                                         free[nb_free++] = m;
 105                                 } else {
 106                                         rte_mempool_put_bulk(free[0]->pool,
 107                                                              (void *)free,
 108                                                              nb_free);
 109                                         free[0] = m;
 110                                         nb_free = 1;
 111                                 }
 112                         }
 113                 }
 114                 rte_mempool_put_bulk(free[0]->pool, (void **)free, nb_free);
 115         } else {
 116                 for (i = 1; i < n; i++) {
 117                         m = rte_pktmbuf_prefree_seg(txep[i].mbuf);
 118                         if (m)
 119                                 rte_mempool_put(m->pool, m);
 120                 }
 121         }
 122
 123         /* buffers were freed, update counters */
 124         txq->nb_tx_free = (uint16_t)(txq->nb_tx_free + txq->tx_rs_thresh);
 125         txq->tx_next_dd = (uint16_t)(txq->tx_next_dd + txq->tx_rs_thresh);
 126         if (txq->tx_next_dd >= txq->nb_tx_desc)
 127                 txq->tx_next_dd = (uint16_t)(txq->tx_rs_thresh - 1);
 128
 129         return txq->tx_rs_thresh;
 130 }
 131
 132 static __rte_always_inline void
 133 ice_tx_backlog_entry(struct ice_tx_entry *txep,
 134                      struct rte_mbuf **tx_pkts, uint16_t nb_pkts)
 135 {
 136         int i;
 137
 138         for (i = 0; i < (int)nb_pkts; ++i)
 139                 txep[i].mbuf = tx_pkts[i];
 140 }
 141
 142 static inline void
 143 _ice_rx_queue_release_mbufs_vec(struct ice_rx_queue *rxq)
 144 {
 145         const unsigned int mask = rxq->nb_rx_desc - 1;
 146         unsigned int i;
 147
 148         if (unlikely(!rxq->sw_ring)) {
 149                 PMD_DRV_LOG(DEBUG, "sw_ring is NULL");
 150                 return;
 151         }
 152
 153         if (rxq->rxrearm_nb >= rxq->nb_rx_desc)
 154                 return;
 155
 156         /* free all mbufs that are valid in the ring */
 157         if (rxq->rxrearm_nb == 0) {
 158                 for (i = 0; i < rxq->nb_rx_desc; i++) {
 159                         if (rxq->sw_ring[i].mbuf)
 160                                 rte_pktmbuf_free_seg(rxq->sw_ring[i].mbuf);
 161                 }
 162         } else {
 163                 for (i = rxq->rx_tail;
 164                      i != rxq->rxrearm_start;
 165                      i = (i + 1) & mask) {
 166                         if (rxq->sw_ring[i].mbuf)
 167                                 rte_pktmbuf_free_seg(rxq->sw_ring[i].mbuf);
 168                 }
 169         }
 170
 171         rxq->rxrearm_nb = rxq->nb_rx_desc;
 172
 173         /* set all entries to NULL */
 174         memset(rxq->sw_ring, 0, sizeof(rxq->sw_ring[0]) * rxq->nb_rx_desc);
 175 }
 176
 177 static inline void
 178 _ice_tx_queue_release_mbufs_vec(struct ice_tx_queue *txq)
 179 {
 180         uint16_t i;
 181
 182         if (unlikely(!txq || !txq->sw_ring)) {
 183                 PMD_DRV_LOG(DEBUG, "Pointer to rxq or sw_ring is NULL");
 184                 return;
 185         }
 186
 187         /**
 188          *  vPMD tx will not set sw_ring's mbuf to NULL after free,
 189          *  so need to free remains more carefully.
 190          */
 191         i = txq->tx_next_dd - txq->tx_rs_thresh + 1;
 192         if (txq->tx_tail < i) {
 193                 for (; i < txq->nb_tx_desc; i++) {
 194                         rte_pktmbuf_free_seg(txq->sw_ring[i].mbuf);
 195                         txq->sw_ring[i].mbuf = NULL;
 196                 }
 197                 i = 0;
 198         }
 199         for (; i < txq->tx_tail; i++) {
 200                 rte_pktmbuf_free_seg(txq->sw_ring[i].mbuf);
 201                 txq->sw_ring[i].mbuf = NULL;
 202         }
 203 }
 204
 205 static inline int
 206 ice_rxq_vec_setup_default(struct ice_rx_queue *rxq)
 207 {
 208         uintptr_t p;
 209         struct rte_mbuf mb_def = { .buf_addr = 0 }; /* zeroed mbuf */
 210
 211         mb_def.nb_segs = 1;
 212         mb_def.data_off = RTE_PKTMBUF_HEADROOM;
 213         mb_def.port = rxq->port_id;
 214         rte_mbuf_refcnt_set(&mb_def, 1);
 215
 216         /* prevent compiler reordering: rearm_data covers previous fields */
 217         rte_compiler_barrier();
 218         p = (uintptr_t)&mb_def.rearm_data;
 219         rxq->mbuf_initializer = *(uint64_t *)p;
 220         return 0;
 221 }
 222
 223 static inline int
 224 ice_rx_vec_queue_default(struct ice_rx_queue *rxq)
 225 {
 226         if (!rxq)
 227                 return -1;
 228
 229         if (!rte_is_power_of_2(rxq->nb_rx_desc))
 230                 return -1;
 231
 232         if (rxq->rx_free_thresh < ICE_VPMD_RX_BURST)
 233                 return -1;
 234
 235         if (rxq->nb_rx_desc % rxq->rx_free_thresh)
 236                 return -1;
 237
 238         if (rxq->proto_xtr != PROTO_XTR_NONE)
 239                 return -1;
 240
 241         return 0;
 242 }
 243
 244 #define ICE_NO_VECTOR_FLAGS (                            \
 245                 DEV_TX_OFFLOAD_MULTI_SEGS |              \
 246                 DEV_TX_OFFLOAD_VLAN_INSERT |             \
 247                 DEV_TX_OFFLOAD_SCTP_CKSUM |              \
 248                 DEV_TX_OFFLOAD_UDP_CKSUM |               \
 249                 DEV_TX_OFFLOAD_TCP_TSO |                 \
 250                 DEV_TX_OFFLOAD_TCP_CKSUM)
 251
 252 static inline int
 253 ice_tx_vec_queue_default(struct ice_tx_queue *txq)
 254 {
 255         if (!txq)
 256                 return -1;
 257
 258         if (txq->offloads & ICE_NO_VECTOR_FLAGS)
 259                 return -1;
 260
 261         if (txq->tx_rs_thresh < ICE_VPMD_TX_BURST ||
 262             txq->tx_rs_thresh > ICE_TX_MAX_FREE_BUF_SZ)
 263                 return -1;
 264
 265         return 0;
 266 }
 267
 268 static inline int
 269 ice_rx_vec_dev_check_default(struct rte_eth_dev *dev)
 270 {
 271         int i;
 272         struct ice_rx_queue *rxq;
 273         struct ice_adapter *ad =
 274                 ICE_DEV_PRIVATE_TO_ADAPTER(dev->data->dev_private);
 275
 276         /* vPMD does not support flow mark. */
 277         if (ad->devargs.flow_mark_support)
 278                 return -1;
 279
 280         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 281                 rxq = dev->data->rx_queues[i];
 282                 if (ice_rx_vec_queue_default(rxq))
 283                         return -1;
 284         }
 285
 286         return 0;
 287 }
 288
 289 static inline int
 290 ice_tx_vec_dev_check_default(struct rte_eth_dev *dev)
 291 {
 292         int i;
 293         struct ice_tx_queue *txq;
 294
 295         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 296                 txq = dev->data->tx_queues[i];
 297                 if (ice_tx_vec_queue_default(txq))
 298                         return -1;
 299         }
 300
 301         return 0;
 302 }
 303
 304 #endif