summaryrefslogtreecommitdiffstats
path: root/lib/librte_port/rte_port.h
blob: c3c534879a4a1f79352c3f79bd2788c2ded3ed35 (plain)
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
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
/*-
 *   BSD LICENSE
 *
 *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
 *   All rights reserved.
 *
 *   Redistribution and use in source and binary forms, with or without
 *   modification, are permitted provided that the following conditions
 *   are met:
 *
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * 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.
 *     * Neither the name of Intel Corporation nor the names of its
 *       contributors may be used to endorse or promote products derived
 *       from this software without specific prior written permission.
 *
 *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT
 *   OWNER 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.
 */

#ifndef __INCLUDE_RTE_PORT_H__
#define __INCLUDE_RTE_PORT_H__

#ifdef __cplusplus
extern "C" {
#endif

/**
 * @file
 * RTE Port
 *
 * This tool is part of the DPDK Packet Framework tool suite and provides
 * a standard interface to implement different types of packet ports.
 *
 ***/

#include <stdint.h>
#include <rte_mbuf.h>

/**@{
 * Macros to allow accessing metadata stored in the mbuf headroom
 * just beyond the end of the mbuf data structure returned by a port
 */
#define RTE_MBUF_METADATA_UINT8_PTR(mbuf, offset)          \
	(&((uint8_t *)(mbuf))[offset])
#define RTE_MBUF_METADATA_UINT16_PTR(mbuf, offset)         \
	((uint16_t *) RTE_MBUF_METADATA_UINT8_PTR(mbuf, offset))
#define RTE_MBUF_METADATA_UINT32_PTR(mbuf, offset)         \
	((uint32_t *) RTE_MBUF_METADATA_UINT8_PTR(mbuf, offset))
#define RTE_MBUF_METADATA_UINT64_PTR(mbuf, offset)         \
	((uint64_t *) RTE_MBUF_METADATA_UINT8_PTR(mbuf, offset))

#define RTE_MBUF_METADATA_UINT8(mbuf, offset)              \
	(*RTE_MBUF_METADATA_UINT8_PTR(mbuf, offset))
#define RTE_MBUF_METADATA_UINT16(mbuf, offset)             \
	(*RTE_MBUF_METADATA_UINT16_PTR(mbuf, offset))
#define RTE_MBUF_METADATA_UINT32(mbuf, offset)             \
	(*RTE_MBUF_METADATA_UINT32_PTR(mbuf, offset))
#define RTE_MBUF_METADATA_UINT64(mbuf, offset)             \
	(*RTE_MBUF_METADATA_UINT64_PTR(mbuf, offset))
/**@}*/

/*
 * Port IN
 *
 */
/** Maximum number of packets read from any input port in a single burst.
Cannot be changed. */
#define RTE_PORT_IN_BURST_SIZE_MAX                         64

/** Input port statistics */
struct rte_port_in_stats {
	uint64_t n_pkts_in;
	uint64_t n_pkts_drop;
};

/**
 * Input port create
 *
 * @param params
 *   Parameters for input port creation
 * @param socket_id
 *   CPU socket ID (e.g. for memory allocation purpose)
 * @return
 *   Handle to input port instance
 */
typedef void* (*rte_port_in_op_create)(void *params, int socket_id);

/**
 * Input port free
 *
 * @param port
 *   Handle to input port instance
 * @return
 *   0 on success, error code otherwise
 */
typedef int (*rte_port_in_op_free)(void *port);

/**
 * Input port packet burst RX
 *
 * @param port
 *   Handle to input port instance
 * @param pkts
 *   Burst of input packets
 * @param n_pkts
 *   Number of packets in the input burst
 * @return
 *   0 on success, error code otherwise
 */
typedef int (*rte_port_in_op_rx)(
	void *port,
	struct rte_mbuf **pkts,
	uint32_t n_pkts);

/**
 * Input port stats get
 *
 * @param port
 *   Handle to output port instance
 * @param stats
 *   Handle to port_in stats struct to copy data
 * @param clear
 *   Flag indicating that stats should be cleared after read
 *
 * @return
 *   Error code or 0 on success.
 */
typedef int (*rte_port_in_op_stats_read)(
		void *port,
		struct rte_port_in_stats *stats,
		int clear);

/** Input port interface defining the input port operation */
struct rte_port_in_ops {
	rte_port_in_op_create f_create;      /**< Create */
	rte_port_in_op_free f_free;          /**< Free */
	rte_port_in_op_rx f_rx;              /**< Packet RX (packet burst) */
	rte_port_in_op_stats_read f_stats;   /**< Stats */
};

/*
 * Port OUT
 *
 */
/** Output port statistics */
struct rte_port_out_stats {
	uint64_t n_pkts_in;
	uint64_t n_pkts_drop;
};

/**
 * Output port create
 *
 * @param params
 *   Parameters for output port creation
 * @param socket_id
 *   CPU socket ID (e.g. for memory allocation purpose)
 * @return
 *   Handle to output port instance
 */
typedef void* (*rte_port_out_op_create)(void *params, int socket_id);

/**
 * Output port free
 *
 * @param port
 *   Handle to output port instance
 * @return
 *   0 on success, error code otherwise
 */
typedef int (*rte_port_out_op_free)(void *port);

/**
 * Output port single packet TX
 *
 * @param port
 *   Handle to output port instance
 * @param pkt
 *   Input packet
 * @return
 *   0 on success, error code otherwise
 */
typedef int (*rte_port_out_op_tx)(
	void *port,
	struct rte_mbuf *pkt);

/**
 * Output port packet burst TX
 *
 * @param port
 *   Handle to output port instance
 * @param pkts
 *   Burst of input packets specified as array of up to 64 pointers to struct
 *   rte_mbuf
 * @param pkts_mask
 *   64-bit bitmask specifying which packets in the input burst are valid. When
 *   pkts_mask bit n is set, then element n of pkts array is pointing to a
 *   valid packet. Otherwise, element n of pkts array will not be accessed.
 * @return
 *   0 on success, error code otherwise
 */
typedef int (*rte_port_out_op_tx_bulk)(
	void *port,
	struct rte_mbuf **pkt,
	uint64_t pkts_mask);

/**
 * Output port flush
 *
 * @param port
 *   Handle to output port instance
 * @return
 *   0 on success, error code otherwise
 */
typedef int (*rte_port_out_op_flush)(void *port);

/**
 * Output port stats read
 *
 * @param port
 *   Handle to output port instance
 * @param stats
 *   Handle to port_out stats struct to copy data
 * @param clear
 *   Flag indicating that stats should be cleared after read
 *
 * @return
 *   Error code or 0 on success.
 */
typedef int (*rte_port_out_op_stats_read)(
		void *port,
		struct rte_port_out_stats *stats,
		int clear);

/** Output port interface defining the output port operation */
struct rte_port_out_ops {
	rte_port_out_op_create f_create;      /**< Create */
	rte_port_out_op_free f_free;          /**< Free */
	rte_port_out_op_tx f_tx;              /**< Packet TX (single packet) */
	rte_port_out_op_tx_bulk f_tx_bulk;    /**< Packet TX (packet burst) */
	rte_port_out_op_flush f_flush;        /**< Flush */
	rte_port_out_op_stats_read f_stats;   /**< Stats */
};

#ifdef __cplusplus
}
#endif

#endif