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
|
/*-
* BSD LICENSE
*
* Copyright(c) 2016 Intel Corporation. All rights reserved.
* Copyright(c) 2016 6WIND S.A.
* 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.
*/
#include <stdio.h>
#include <string.h>
#include <rte_mempool.h>
#include <rte_errno.h>
/* indirect jump table to support external memory pools. */
struct rte_mempool_ops_table rte_mempool_ops_table = {
.sl = RTE_SPINLOCK_INITIALIZER,
.num_ops = 0
};
/* add a new ops struct in rte_mempool_ops_table, return its index. */
int
rte_mempool_register_ops(const struct rte_mempool_ops *h)
{
struct rte_mempool_ops *ops;
int16_t ops_index;
rte_spinlock_lock(&rte_mempool_ops_table.sl);
if (rte_mempool_ops_table.num_ops >=
RTE_MEMPOOL_MAX_OPS_IDX) {
rte_spinlock_unlock(&rte_mempool_ops_table.sl);
RTE_LOG(ERR, MEMPOOL,
"Maximum number of mempool ops structs exceeded\n");
return -ENOSPC;
}
if (h->alloc == NULL || h->enqueue == NULL ||
h->dequeue == NULL || h->get_count == NULL) {
rte_spinlock_unlock(&rte_mempool_ops_table.sl);
RTE_LOG(ERR, MEMPOOL,
"Missing callback while registering mempool ops\n");
return -EINVAL;
}
if (strlen(h->name) >= sizeof(ops->name) - 1) {
rte_spinlock_unlock(&rte_mempool_ops_table.sl);
RTE_LOG(DEBUG, EAL, "%s(): mempool_ops <%s>: name too long\n",
__func__, h->name);
rte_errno = EEXIST;
return -EEXIST;
}
ops_index = rte_mempool_ops_table.num_ops++;
ops = &rte_mempool_ops_table.ops[ops_index];
snprintf(ops->name, sizeof(ops->name), "%s", h->name);
ops->alloc = h->alloc;
ops->free = h->free;
ops->enqueue = h->enqueue;
ops->dequeue = h->dequeue;
ops->get_count = h->get_count;
rte_spinlock_unlock(&rte_mempool_ops_table.sl);
return ops_index;
}
/* wrapper to allocate an external mempool's private (pool) data. */
int
rte_mempool_ops_alloc(struct rte_mempool *mp)
{
struct rte_mempool_ops *ops;
ops = rte_mempool_get_ops(mp->ops_index);
return ops->alloc(mp);
}
/* wrapper to free an external pool ops. */
void
rte_mempool_ops_free(struct rte_mempool *mp)
{
struct rte_mempool_ops *ops;
ops = rte_mempool_get_ops(mp->ops_index);
if (ops->free == NULL)
return;
ops->free(mp);
}
/* wrapper to get available objects in an external mempool. */
unsigned int
rte_mempool_ops_get_count(const struct rte_mempool *mp)
{
struct rte_mempool_ops *ops;
ops = rte_mempool_get_ops(mp->ops_index);
return ops->get_count(mp);
}
/* sets mempool ops previously registered by rte_mempool_register_ops. */
int
rte_mempool_set_ops_byname(struct rte_mempool *mp, const char *name,
void *pool_config)
{
struct rte_mempool_ops *ops = NULL;
unsigned i;
/* too late, the mempool is already populated. */
if (mp->flags & MEMPOOL_F_POOL_CREATED)
return -EEXIST;
for (i = 0; i < rte_mempool_ops_table.num_ops; i++) {
if (!strcmp(name,
rte_mempool_ops_table.ops[i].name)) {
ops = &rte_mempool_ops_table.ops[i];
break;
}
}
if (ops == NULL)
return -EINVAL;
mp->ops_index = i;
mp->pool_config = pool_config;
return 0;
}
|
