2 *------------------------------------------------------------------
3 * Copyright (c) 2017 Cisco and/or its affiliates.
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:
8 * http://www.apache.org/licenses/LICENSE-2.0
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 *------------------------------------------------------------------
21 #ifndef MEMIF_CACHELINE_SIZE
22 #define MEMIF_CACHELINE_SIZE 64
29 typedef enum memif_msg_type
31 MEMIF_MSG_TYPE_NONE = 0,
32 MEMIF_MSG_TYPE_ACK = 1,
33 MEMIF_MSG_TYPE_HELLO = 2,
34 MEMIF_MSG_TYPE_INIT = 3,
35 MEMIF_MSG_TYPE_ADD_REGION = 4,
36 MEMIF_MSG_TYPE_ADD_RING = 5,
37 MEMIF_MSG_TYPE_CONNECT = 6,
38 MEMIF_MSG_TYPE_CONNECTED = 7,
39 MEMIF_MSG_TYPE_DISCONNECT = 8,
50 MEMIF_INTERFACE_MODE_ETHERNET = 0,
51 MEMIF_INTERFACE_MODE_IP = 1,
52 MEMIF_INTERFACE_MODE_PUNT_INJECT = 2,
53 } memif_interface_mode_t;
55 typedef uint16_t memif_region_index_t;
56 typedef uint16_t memif_ring_index_t;
57 typedef uint32_t memif_interface_id_t;
58 typedef uint16_t memif_version_t;
64 typedef struct __attribute__ ((packed))
67 memif_version_t min_version;
68 memif_version_t max_version;
69 memif_region_index_t max_region;
70 memif_ring_index_t max_m2s_ring;
71 memif_ring_index_t max_s2m_ring;
72 uint8_t max_log2_ring_size;
75 typedef struct __attribute__ ((packed))
77 memif_version_t version;
78 memif_interface_id_t id;
79 memif_interface_mode_t mode:8;
84 typedef struct __attribute__ ((packed))
86 memif_region_index_t index;
88 } memif_msg_add_region_t;
90 typedef struct __attribute__ ((packed))
93 #define MEMIF_MSG_ADD_RING_FLAG_S2M (1 << 0)
94 memif_ring_index_t index;
95 memif_region_index_t region;
97 uint8_t log2_ring_size;
98 } memif_msg_add_ring_t;
100 typedef struct __attribute__ ((packed))
103 } memif_msg_connect_t;
105 typedef struct __attribute__ ((packed))
108 } memif_msg_connected_t;
110 typedef struct __attribute__ ((packed))
114 } memif_msg_disconnect_t;
116 typedef struct __attribute__ ((packed, aligned (128)))
118 memif_msg_type_t type:16;
121 memif_msg_hello_t hello;
122 memif_msg_init_t init;
123 memif_msg_add_region_t add_region;
124 memif_msg_add_ring_t add_ring;
125 memif_msg_connect_t connect;
126 memif_msg_connected_t connected;
127 memif_msg_disconnect_t disconnect;
131 _Static_assert (sizeof (memif_msg_t) == 128,
132 "Size of memif_msg_t must be 128");
135 * Ring and Descriptor Layout
138 typedef struct __attribute__ ((packed))
141 #define MEMIF_DESC_FLAG_NEXT (1 << 0)
142 memif_region_index_t region;
143 uint32_t buffer_length;
150 _Static_assert (sizeof (memif_desc_t) == 32,
151 "Size of memif_dsct_t must be 32");
153 #define MEMIF_CACHELINE_ALIGN_MARK(mark) \
154 uint8_t mark[0] __attribute__((aligned(MEMIF_CACHELINE_SIZE)))
158 MEMIF_CACHELINE_ALIGN_MARK (cacheline0);
161 #define MEMIF_RING_FLAG_MASK_INT 1
162 volatile uint16_t head;
163 MEMIF_CACHELINE_ALIGN_MARK (cacheline1);
164 volatile uint16_t tail;
165 MEMIF_CACHELINE_ALIGN_MARK (cacheline2);
166 memif_desc_t desc[0];
169 #endif /* _MEMIF_H_ */
172 * fd.io coding-style-patch-verification: ON
175 * eval: (c-set-style "gnu")