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
|
/*
* Copyright (c) 2021 Intel.
*
* 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 MFEX_AVX512_EXTRACT
#define MFEX_AVX512_EXTRACT 1
#include <sys/types.h>
#define MFEX_IMPL_AVX512_CHECK (__x86_64__ && HAVE_AVX512F \
&& HAVE_LD_AVX512_GOOD && HAVE_AVX512BW && __SSE4_2__)
/* Forward declarations. */
struct dp_packet;
struct miniflow;
struct dp_netdev_pmd_thread;
struct dp_packet_batch;
struct netdev_flow_key;
/* Function pointer prototype to be implemented in the optimized miniflow
* extract code.
* returns the hitmask of the processed packets on success.
* returns zero on failure.
*/
typedef uint32_t (*miniflow_extract_func)(struct dp_packet_batch *batch,
struct netdev_flow_key *keys,
uint32_t keys_size,
odp_port_t in_port,
struct dp_netdev_pmd_thread
*pmd_handle);
/* The function pointer miniflow_extract_func depends on batch size. */
BUILD_ASSERT_DECL(NETDEV_MAX_BURST == 32);
/* Assert if there is flow map units change. */
BUILD_ASSERT_DECL(FLOWMAP_UNITS == 2);
/* Probe function is used to detect if this CPU has the ISA required
* to run the optimized miniflow implementation.
* returns one on successful probe.
* returns negative errno on failure.
*/
typedef int (*miniflow_extract_probe)(void);
/* Structure representing the attributes of an optimized implementation. */
struct dpif_miniflow_extract_impl {
/* When it is true, this impl has passed the probe() checks. */
bool available;
/* Probe function is used to detect if this CPU has the ISA required
* to run the optimized miniflow implementation. It is optional and
* if it is not used, then it must be null.
*/
miniflow_extract_probe probe;
/* Optional function to call to extract miniflows for a burst of packets.
* If it is not used must be set to NULL;
*/
miniflow_extract_func extract_func;
/* Name of the optimized implementation. */
char *name;
};
/* Enum to hold implementation indexes. The list is traversed
* linearly as from the ISA perspective, the VBMI version
* should always come before the generic AVX512-F version.
*/
enum dpif_miniflow_extract_impl_idx {
MFEX_IMPL_AUTOVALIDATOR,
MFEX_IMPL_SCALAR,
MFEX_IMPL_STUDY,
#if MFEX_IMPL_AVX512_CHECK
#if HAVE_AVX512VBMI
MFEX_IMPL_VBMI_IPv4_UDP,
#endif
MFEX_IMPL_IPv4_UDP,
#if HAVE_AVX512VBMI
MFEX_IMPL_VBMI_IPv4_TCP,
#endif
MFEX_IMPL_IPv4_TCP,
#if HAVE_AVX512VBMI
MFEX_IMPL_VBMI_DOT1Q_IPv4_UDP,
#endif
MFEX_IMPL_DOT1Q_IPv4_UDP,
#if HAVE_AVX512VBMI
MFEX_IMPL_VBMI_DOT1Q_IPv4_TCP,
#endif
MFEX_IMPL_DOT1Q_IPv4_TCP,
#if HAVE_AVX512VBMI
MFEX_IMPL_VBMI_IPv6_UDP,
#endif
MFEX_IMPL_IPv6_UDP,
#if HAVE_AVX512VBMI
MFEX_IMPL_VBMI_IPv6_TCP,
#endif
MFEX_IMPL_IPv6_TCP,
#if HAVE_AVX512VBMI
MFEX_IMPL_VBMI_DOT1Q_IPv6_TCP,
#endif
MFEX_IMPL_DOT1Q_IPv6_TCP,
#if HAVE_AVX512VBMI
MFEX_IMPL_VBMI_DOT1Q_IPv6_UDP,
#endif
MFEX_IMPL_DOT1Q_IPv6_UDP,
#if HAVE_AVX512VBMI
MFEX_IMPL_VBMI_IPv4_NVGRE,
#endif
MFEX_IMPL_IPv4_NVGRE,
#endif
MFEX_IMPL_MAX
};
extern struct ovs_mutex dp_netdev_mutex;
/* Define a index which points to the first traffic optimized MFEX
* option from the enum list else holds max value.
*/
#if MFEX_IMPL_AVX512_CHECK
#if HAVE_AVX512VBMI
#define MFEX_IMPL_START_IDX MFEX_IMPL_VBMI_IPv4_UDP
#else
#define MFEX_IMPL_START_IDX MFEX_IMPL_IPv4_UDP
#endif
#else
#define MFEX_IMPL_START_IDX MFEX_IMPL_MAX
#endif
/* Max count of packets to be compared. */
#define MFEX_MAX_PKT_COUNT (128)
/* This function returns all available implementations to the caller. The
* quantity of implementations is returned by the int return value.
*/
void
dp_mfex_impl_get(struct ds *reply, struct dp_netdev_pmd_thread **pmd_list,
size_t pmd_list_size) OVS_REQUIRES(dp_netdev_mutex);
/* This function checks all available MFEX implementations, and selects the
* returns the function pointer to the one requested by "name".
*/
int
dp_mfex_impl_get_by_name(const char *name, miniflow_extract_func *out_func);
/* Returns the default MFEX which is first ./configure selected, but can be
* overridden at runtime. */
miniflow_extract_func dp_mfex_impl_get_default(void);
/* Overrides the default MFEX with the user set MFEX. */
int dp_mfex_impl_set_default_by_name(const char *name);
/* Retrieve the array of miniflow implementations for iteration. */
struct dpif_miniflow_extract_impl *
dpif_mfex_impl_info_get(void);
/* Initializes the available miniflow extract implementations by probing for
* the CPU ISA requirements. As the runtime available CPU ISA does not change
* and the required ISA of the implementation also does not change, it is safe
* to cache the probe() results, and not call probe() at runtime.
*/
void
dpif_miniflow_extract_init(void);
/* Retrieve the hitmask of the batch of pakcets which is obtained by comparing
* different miniflow implementations with linear miniflow extract.
* Key_size need to be at least the size of the batch.
* On error, returns a zero.
* On success, returns the number of packets in the batch compared.
*/
uint32_t
dpif_miniflow_extract_autovalidator(struct dp_packet_batch *batch,
struct netdev_flow_key *keys,
uint32_t keys_size, odp_port_t in_port,
struct dp_netdev_pmd_thread *pmd_handle);
/* Retrieve the number of packets by studying packets using different miniflow
* implementations to choose the best implementation using the maximum hitmask
* count.
* On error, returns a zero for no packets.
* On success, returns mask of the packets hit.
*/
uint32_t
mfex_study_traffic(struct dp_packet_batch *packets,
struct netdev_flow_key *keys,
uint32_t keys_size, odp_port_t in_port,
struct dp_netdev_pmd_thread *pmd_handle);
/* Sets the packet count from user to the stats for use in
* study function to match against the classified packets to choose
* the optimal implementation.
* On error, returns -EINVAL.
* On success, returns 0.
*/
int
mfex_set_study_pkt_cnt(uint32_t pkt_cmp_count, const char *name);
/* AVX512 MFEX Implementation functions. */
#ifdef __x86_64__
#define DECLARE_AVX512_MFEX_PROTOTYPE(name) \
uint32_t \
mfex_avx512_vbmi_##name(struct dp_packet_batch *packets, \
struct netdev_flow_key *keys, uint32_t keys_size,\
odp_port_t in_port, struct dp_netdev_pmd_thread \
*pmd_handle); \
uint32_t \
mfex_avx512_##name(struct dp_packet_batch *packets, \
struct netdev_flow_key *keys, uint32_t keys_size, \
odp_port_t in_port, struct dp_netdev_pmd_thread \
*pmd_handle); \
DECLARE_AVX512_MFEX_PROTOTYPE(ip_udp);
DECLARE_AVX512_MFEX_PROTOTYPE(ip_tcp);
DECLARE_AVX512_MFEX_PROTOTYPE(dot1q_ip_udp);
DECLARE_AVX512_MFEX_PROTOTYPE(dot1q_ip_tcp);
DECLARE_AVX512_MFEX_PROTOTYPE(ipv6_udp);
DECLARE_AVX512_MFEX_PROTOTYPE(ipv6_tcp);
DECLARE_AVX512_MFEX_PROTOTYPE(dot1q_ipv6_tcp);
DECLARE_AVX512_MFEX_PROTOTYPE(dot1q_ipv6_udp);
DECLARE_AVX512_MFEX_PROTOTYPE(ip_nvgre);
#endif /* __x86_64__ */
#endif /* MFEX_AVX512_EXTRACT */
|
