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Vector Packet Processing
memif.h
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1 /*
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:
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 
18 #ifndef _MEMIF_H_
19 #define _MEMIF_H_
20 
21 #include <stdint.h>
22 
23 #ifndef MEMIF_CACHELINE_SIZE
24 #define MEMIF_CACHELINE_SIZE 64
25 #endif
26 
27 #define MEMIF_COOKIE 0x3E31F20
28 #define MEMIF_VERSION_MAJOR 2
29 #define MEMIF_VERSION_MINOR 0
30 #define MEMIF_VERSION ((MEMIF_VERSION_MAJOR << 8) | MEMIF_VERSION_MINOR)
31 
32 /*
33  * Type definitions
34  */
35 
36 typedef enum memif_msg_type
37 {
48 
49 typedef enum
50 {
54 
55 typedef enum
56 {
61 
62 typedef uint16_t memif_region_index_t;
63 typedef uint32_t memif_region_offset_t;
64 typedef uint64_t memif_region_size_t;
65 typedef uint16_t memif_ring_index_t;
66 typedef uint32_t memif_interface_id_t;
67 typedef uint16_t memif_version_t;
68 typedef uint8_t memif_log2_ring_size_t;
69 
70 /*
71  * Socket messages
72  */
73 
74 typedef struct __attribute__ ((packed))
75 {
76  uint8_t name[32];
77  memif_version_t min_version;
78  memif_version_t max_version;
79  memif_region_index_t max_region;
80  memif_ring_index_t max_m2s_ring;
81  memif_ring_index_t max_s2m_ring;
82  memif_log2_ring_size_t max_log2_ring_size;
84 
85 typedef struct __attribute__ ((packed))
86 {
87  memif_version_t version;
88  memif_interface_id_t id;
90  uint8_t secret[24];
91  uint8_t name[32];
93 
94 typedef struct __attribute__ ((packed))
95 {
96  memif_region_index_t index;
97  memif_region_size_t size;
99 
100 typedef struct __attribute__ ((packed))
101 {
102  uint16_t flags;
103 #define MEMIF_MSG_ADD_RING_FLAG_S2M (1 << 0)
104  memif_ring_index_t index;
105  memif_region_index_t region;
106  memif_region_offset_t offset;
107  memif_log2_ring_size_t log2_ring_size;
108  uint16_t private_hdr_size; /* used for private metadata */
110 
111 typedef struct __attribute__ ((packed))
112 {
113  uint8_t if_name[32];
115 
116 typedef struct __attribute__ ((packed))
117 {
118  uint8_t if_name[32];
120 
121 typedef struct __attribute__ ((packed))
122 {
123  uint32_t code;
124  uint8_t string[96];
126 
127 typedef struct __attribute__ ((packed, aligned (128)))
128 {
129  memif_msg_type_t type:16;
130  union
131  {
132  memif_msg_hello_t hello;
134  memif_msg_add_region_t add_region;
135  memif_msg_add_ring_t add_ring;
136  memif_msg_connect_t connect;
137  memif_msg_connected_t connected;
138  memif_msg_disconnect_t disconnect;
139  };
140 } memif_msg_t;
141 
142 _Static_assert (sizeof (memif_msg_t) == 128,
143  "Size of memif_msg_t must be 128");
144 
145 /*
146  * Ring and Descriptor Layout
147  */
148 
149 typedef struct __attribute__ ((packed))
150 {
151  uint16_t flags;
152 #define MEMIF_DESC_FLAG_NEXT (1 << 0)
153  memif_region_index_t region;
154  uint32_t length;
155  memif_region_offset_t offset;
156  uint32_t metadata;
157 } memif_desc_t;
158 
159 _Static_assert (sizeof (memif_desc_t) == 16,
160  "Size of memif_dsct_t must be 16 bytes");
161 
162 #define MEMIF_CACHELINE_ALIGN_MARK(mark) \
163  uint8_t mark[0] __attribute__((aligned(MEMIF_CACHELINE_SIZE)))
164 
165 typedef struct
166 {
167  MEMIF_CACHELINE_ALIGN_MARK (cacheline0);
168  uint32_t cookie;
169  uint16_t flags;
170 #define MEMIF_RING_FLAG_MASK_INT 1
171  volatile uint16_t head;
172  MEMIF_CACHELINE_ALIGN_MARK (cacheline1);
173  volatile uint16_t tail;
174  MEMIF_CACHELINE_ALIGN_MARK (cacheline2);
175  memif_desc_t desc[0];
176 } memif_ring_t;
177 
178 #endif /* _MEMIF_H_ */
179 
180 /*
181  * fd.io coding-style-patch-verification: ON
182  *
183  * Local Variables:
184  * eval: (c-set-style "gnu")
185  * End:
186  */
memif_msg_type
Definition: memif.h:34
#define MEMIF_CACHELINE_ALIGN_MARK(mark)
Definition: memif.h:162
uint16_t memif_ring_index_t
Definition: memif.h:63
u32 flags
Definition: vhost_user.h:115
memif_interface_mode_t
Definition: memif.h:53
uint16_t memif_region_index_t
Definition: memif.h:60
enum memif_msg_type memif_msg_type_t
uint16_t memif_version_t
Definition: memif.h:65
uword size
uint32_t memif_region_offset_t
Definition: memif.h:61
uint8_t memif_log2_ring_size_t
Definition: memif.h:66
u8 name[64]
Definition: memclnt.api:152
uint32_t memif_interface_id_t
Definition: memif.h:64
option version
Definition: memclnt.api:17
static void init(void)
Definition: client.c:115
uint64_t memif_region_size_t
Definition: memif.h:62
struct clib_bihash_value offset
template key/value backing page structure
vl_api_gbp_vxlan_tunnel_mode_t mode
Definition: gbp.api:349
memif_ring_type_t
Definition: memif.h:47
u32 id
Definition: udp.api:45