diff options
Diffstat (limited to 'vpp/vnet/vnet/devices/netmap/netmap.h')
| -rw-r--r-- | vpp/vnet/vnet/devices/netmap/netmap.h | 164 |
1 files changed, 164 insertions, 0 deletions
diff --git a/vpp/vnet/vnet/devices/netmap/netmap.h b/vpp/vnet/vnet/devices/netmap/netmap.h new file mode 100644 index 00000000..39a94043 --- /dev/null +++ b/vpp/vnet/vnet/devices/netmap/netmap.h @@ -0,0 +1,164 @@ +/* + *------------------------------------------------------------------ + * Copyright (c) 2016 Cisco and/or its affiliates. + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at: + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + *------------------------------------------------------------------ + */ +/* + * Copyright (C) 2011-2014 Universita` di Pisa. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +typedef struct +{ + CLIB_CACHE_LINE_ALIGN_MARK (cacheline0); + volatile u32 *lockp; + u8 *host_if_name; + uword if_index; + u32 hw_if_index; + u32 sw_if_index; + u32 unix_file_index; + + u32 per_interface_next_index; + u8 is_admin_up; + + /* netmap */ + struct nmreq *req; + u16 mem_region; + int fd; + struct netmap_if *nifp; + u16 first_tx_ring; + u16 last_tx_ring; + u16 first_rx_ring; + u16 last_rx_ring; + +} netmap_if_t; + +typedef struct +{ + char *mem; + u32 region_size; + int refcnt; +} netmap_mem_region_t; + +typedef struct +{ + CLIB_CACHE_LINE_ALIGN_MARK (cacheline0); + netmap_if_t *interfaces; + + /* bitmap of pending rx interfaces */ + uword *pending_input_bitmap; + + /* rx buffer cache */ + u32 **rx_buffers; + + /* hash of host interface names */ + mhash_t if_index_by_host_if_name; + + /* vector of memory regions */ + netmap_mem_region_t *mem_regions; + + /* first cpu index */ + u32 input_cpu_first_index; + + /* total cpu count */ + u32 input_cpu_count; +} netmap_main_t; + +netmap_main_t netmap_main; +extern vnet_device_class_t netmap_device_class; +extern vlib_node_registration_t netmap_input_node; + +int netmap_create_if (vlib_main_t * vm, u8 * host_if_name, u8 * hw_addr_set, + u8 is_pipe, u8 is_master, u32 * sw_if_index); +int netmap_delete_if (vlib_main_t * vm, u8 * host_if_name); + + +/* Macros and helper functions from sys/net/netmap_user.h */ + +#ifdef _NET_NETMAP_H_ + +#define _NETMAP_OFFSET(type, ptr, offset) \ + ((type)(void *)((char *)(ptr) + (offset))) + +#define NETMAP_IF(_base, _ofs) _NETMAP_OFFSET(struct netmap_if *, _base, _ofs) + +#define NETMAP_TXRING(nifp, index) _NETMAP_OFFSET(struct netmap_ring *, \ + nifp, (nifp)->ring_ofs[index] ) + +#define NETMAP_RXRING(nifp, index) _NETMAP_OFFSET(struct netmap_ring *, \ + nifp, (nifp)->ring_ofs[index + (nifp)->ni_tx_rings + 1] ) + +#define NETMAP_BUF(ring, index) \ + ((char *)(ring) + (ring)->buf_ofs + ((index)*(ring)->nr_buf_size)) + +#define NETMAP_BUF_IDX(ring, buf) \ + ( ((char *)(buf) - ((char *)(ring) + (ring)->buf_ofs) ) / \ + (ring)->nr_buf_size ) + +static inline uint32_t +nm_ring_next (struct netmap_ring *ring, uint32_t i) +{ + return (PREDICT_FALSE (i + 1 == ring->num_slots) ? 0 : i + 1); +} + + +/* + * Return 1 if we have pending transmissions in the tx ring. + * When everything is complete ring->head = ring->tail + 1 (modulo ring size) + */ +static inline int +nm_tx_pending (struct netmap_ring *ring) +{ + return nm_ring_next (ring, ring->tail) != ring->head; +} + +static inline uint32_t +nm_ring_space (struct netmap_ring *ring) +{ + int ret = ring->tail - ring->cur; + if (ret < 0) + ret += ring->num_slots; + return ret; +} +#endif + + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ |