lib/netdev-afxdp-pool.h

   1 /*
   2  * Copyright (c) 2018, 2019 Nicira, Inc.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at:
   7  *
   8  *     http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 #ifndef XDPSOCK_H
  18 #define XDPSOCK_H 1
  19
  20 #ifdef HAVE_AF_XDP
  21
  22 #include <bpf/xsk.h>
  23 #include <errno.h>
  24 #include <stdbool.h>
  25
  26 #include "openvswitch/thread.h"
  27 #include "ovs-atomic.h"
  28
  29 /* LIFO ptr_array. */
  30 struct umem_pool {
  31     int index;      /* Point to top. */
  32     unsigned int size;
  33     struct ovs_spin lock;
  34     void **array;   /* A pointer array pointing to umem buf. */
  35 };
  36
  37 /* Array-based dp_packet_afxdp. */
  38 struct xpacket_pool {
  39     unsigned int size;
  40     struct dp_packet_afxdp *array;
  41 };
  42
  43 void umem_elem_push(struct umem_pool *umemp, void *addr);
  44 void umem_elem_push_n(struct umem_pool *umemp, int n, void **addrs);
  45
  46 void *umem_elem_pop(struct umem_pool *umemp);
  47 int umem_elem_pop_n(struct umem_pool *umemp, int n, void **addrs);
  48
  49 int umem_pool_init(struct umem_pool *umemp, unsigned int size);
  50 void umem_pool_cleanup(struct umem_pool *umemp);
  51 unsigned int umem_pool_count(struct umem_pool *umemp);
  52 int xpacket_pool_init(struct xpacket_pool *xp, unsigned int size);
  53 void xpacket_pool_cleanup(struct xpacket_pool *xp);
  54
  55 #endif
  56 #endif