1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
|
/*
*------------------------------------------------------------------
* Copyright (c) 2018 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.
*------------------------------------------------------------------
*/
#ifndef _AF_XDP_H_
#define _AF_XDP_H_
#include <vlib/log.h>
#include <vnet/interface.h>
#include <xdp/xsk.h>
#define AF_XDP_NUM_RX_QUEUES_ALL ((u16)-1)
#define af_xdp_log(lvl, dev, f, ...) \
vlib_log(lvl, af_xdp_main.log_class, "%v: " f, (dev)->name, ##__VA_ARGS__)
#define foreach_af_xdp_device_flags \
_ (0, INITIALIZED, "initialized") \
_ (1, ERROR, "error") \
_ (2, ADMIN_UP, "admin-up") \
_ (3, LINK_UP, "link-up") \
_ (4, ZEROCOPY, "zero-copy") \
_ (5, SYSCALL_LOCK, "syscall-lock")
enum
{
#define _(a, b, c) AF_XDP_DEVICE_F_##b = (1 << a),
foreach_af_xdp_device_flags
#undef _
};
#define af_xdp_device_error(dev, fmt, ...) \
if (!(dev)->error) \
{ \
clib_error_t *err_ = clib_error_return_unix (0, fmt, ## __VA_ARGS__); \
if (!clib_atomic_bool_cmp_and_swap (&(dev)->error, 0, err_)) \
clib_error_free(err_); \
}
typedef enum
{
AF_XDP_RXQ_MODE_UNKNOWN,
AF_XDP_RXQ_MODE_POLLING,
AF_XDP_RXQ_MODE_INTERRUPT,
} __clib_packed af_xdp_rxq_mode_t;
typedef struct
{
CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
/* fields below are accessed in data-plane (hot) */
clib_spinlock_t syscall_lock;
struct xsk_ring_cons rx;
struct xsk_ring_prod fq;
int xsk_fd;
/* fields below are accessed in control-plane only (cold) */
uword file_index;
u32 queue_index;
af_xdp_rxq_mode_t mode;
} af_xdp_rxq_t;
typedef struct
{
CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
/* fields below are accessed in data-plane (hot) */
clib_spinlock_t lock;
clib_spinlock_t syscall_lock;
struct xsk_ring_prod tx;
struct xsk_ring_cons cq;
int xsk_fd;
/* fields below are accessed in control-plane only (cold) */
u32 queue_index;
} af_xdp_txq_t;
typedef struct
{
CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
/* fields below are accessed in data-plane (hot) */
af_xdp_rxq_t *rxqs;
af_xdp_txq_t *txqs;
vlib_buffer_t *buffer_template;
u32 per_interface_next_index;
u32 sw_if_index;
u32 hw_if_index;
u32 flags;
u8 pool; /* buffer pool index */
u8 txq_num;
/* fields below are accessed in control-plane only (cold) */
char *name;
char *linux_ifname;
u32 dev_instance;
u8 hwaddr[6];
u8 rxq_num;
char *netns;
struct xsk_umem **umem;
struct xsk_socket **xsk;
struct bpf_object *bpf_obj;
unsigned linux_ifindex;
/* error */
clib_error_t *error;
} af_xdp_device_t;
typedef struct
{
af_xdp_device_t *devices;
vlib_log_class_t log_class;
u16 msg_id_base;
} af_xdp_main_t;
extern af_xdp_main_t af_xdp_main;
typedef enum
{
AF_XDP_MODE_AUTO = 0,
AF_XDP_MODE_COPY = 1,
AF_XDP_MODE_ZERO_COPY = 2,
} af_xdp_mode_t;
typedef enum
{
AF_XDP_CREATE_FLAGS_NO_SYSCALL_LOCK = 1,
} af_xdp_create_flag_t;
typedef struct
{
char *linux_ifname;
char *name;
char *prog;
char *netns;
af_xdp_mode_t mode;
af_xdp_create_flag_t flags;
u32 rxq_size;
u32 txq_size;
u32 rxq_num;
/* return */
int rv;
u32 sw_if_index;
clib_error_t *error;
} af_xdp_create_if_args_t;
void af_xdp_create_if (vlib_main_t * vm, af_xdp_create_if_args_t * args);
void af_xdp_delete_if (vlib_main_t * vm, af_xdp_device_t * ad);
void af_xdp_device_input_refill (af_xdp_device_t *ad);
extern vlib_node_registration_t af_xdp_input_node;
extern vnet_device_class_t af_xdp_device_class;
/* format.c */
format_function_t format_af_xdp_device;
format_function_t format_af_xdp_device_name;
format_function_t format_af_xdp_input_trace;
/* unformat.c */
unformat_function_t unformat_af_xdp_create_if_args;
typedef struct
{
u32 next_index;
u32 hw_if_index;
} af_xdp_input_trace_t;
#define foreach_af_xdp_tx_func_error \
_ (NO_FREE_SLOTS, "no free tx slots") \
_ (SYSCALL_REQUIRED, "syscall required") \
_ (SYSCALL_FAILURES, "syscall failures")
typedef enum
{
#define _(f,s) AF_XDP_TX_ERROR_##f,
foreach_af_xdp_tx_func_error
#undef _
AF_XDP_TX_N_ERROR,
} af_xdp_tx_func_error_t;
#endif /* _AF_XDP_H_ */
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
|
