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1 | /*- |
2 | * BSD LICENSE | |
3 | * | |
4 | * Copyright(c) 2016 Intel Corporation. All rights reserved. | |
5 | * Copyright(c) 2016 6WIND S.A. | |
6 | * All rights reserved. | |
7 | * | |
8 | * Redistribution and use in source and binary forms, with or without | |
9 | * modification, are permitted provided that the following conditions | |
10 | * are met: | |
11 | * | |
12 | * * Redistributions of source code must retain the above copyright | |
13 | * notice, this list of conditions and the following disclaimer. | |
14 | * * Redistributions in binary form must reproduce the above copyright | |
15 | * notice, this list of conditions and the following disclaimer in | |
16 | * the documentation and/or other materials provided with the | |
17 | * distribution. | |
18 | * * Neither the name of Intel Corporation nor the names of its | |
19 | * contributors may be used to endorse or promote products derived | |
20 | * from this software without specific prior written permission. | |
21 | * | |
22 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
23 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
24 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
25 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
26 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
27 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
28 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
29 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
30 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
31 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
32 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
33 | */ | |
34 | ||
35 | #include <stdio.h> | |
36 | #include <string.h> | |
37 | ||
38 | #include <rte_mempool.h> | |
39 | #include <rte_errno.h> | |
40 | ||
41 | /* indirect jump table to support external memory pools. */ | |
42 | struct rte_mempool_ops_table rte_mempool_ops_table = { | |
43 | .sl = RTE_SPINLOCK_INITIALIZER, | |
44 | .num_ops = 0 | |
45 | }; | |
46 | ||
47 | /* add a new ops struct in rte_mempool_ops_table, return its index. */ | |
48 | int | |
49 | rte_mempool_register_ops(const struct rte_mempool_ops *h) | |
50 | { | |
51 | struct rte_mempool_ops *ops; | |
52 | int16_t ops_index; | |
53 | ||
54 | rte_spinlock_lock(&rte_mempool_ops_table.sl); | |
55 | ||
56 | if (rte_mempool_ops_table.num_ops >= | |
57 | RTE_MEMPOOL_MAX_OPS_IDX) { | |
58 | rte_spinlock_unlock(&rte_mempool_ops_table.sl); | |
59 | RTE_LOG(ERR, MEMPOOL, | |
60 | "Maximum number of mempool ops structs exceeded\n"); | |
61 | return -ENOSPC; | |
62 | } | |
63 | ||
64 | if (h->alloc == NULL || h->enqueue == NULL || | |
65 | h->dequeue == NULL || h->get_count == NULL) { | |
66 | rte_spinlock_unlock(&rte_mempool_ops_table.sl); | |
67 | RTE_LOG(ERR, MEMPOOL, | |
68 | "Missing callback while registering mempool ops\n"); | |
69 | return -EINVAL; | |
70 | } | |
71 | ||
72 | if (strlen(h->name) >= sizeof(ops->name) - 1) { | |
73 | rte_spinlock_unlock(&rte_mempool_ops_table.sl); | |
74 | RTE_LOG(DEBUG, EAL, "%s(): mempool_ops <%s>: name too long\n", | |
75 | __func__, h->name); | |
76 | rte_errno = EEXIST; | |
77 | return -EEXIST; | |
78 | } | |
79 | ||
80 | ops_index = rte_mempool_ops_table.num_ops++; | |
81 | ops = &rte_mempool_ops_table.ops[ops_index]; | |
82 | snprintf(ops->name, sizeof(ops->name), "%s", h->name); | |
83 | ops->alloc = h->alloc; | |
84 | ops->free = h->free; | |
85 | ops->enqueue = h->enqueue; | |
86 | ops->dequeue = h->dequeue; | |
87 | ops->get_count = h->get_count; | |
88 | ||
89 | rte_spinlock_unlock(&rte_mempool_ops_table.sl); | |
90 | ||
91 | return ops_index; | |
92 | } | |
93 | ||
94 | /* wrapper to allocate an external mempool's private (pool) data. */ | |
95 | int | |
96 | rte_mempool_ops_alloc(struct rte_mempool *mp) | |
97 | { | |
98 | struct rte_mempool_ops *ops; | |
99 | ||
100 | ops = rte_mempool_get_ops(mp->ops_index); | |
101 | return ops->alloc(mp); | |
102 | } | |
103 | ||
104 | /* wrapper to free an external pool ops. */ | |
105 | void | |
106 | rte_mempool_ops_free(struct rte_mempool *mp) | |
107 | { | |
108 | struct rte_mempool_ops *ops; | |
109 | ||
110 | ops = rte_mempool_get_ops(mp->ops_index); | |
111 | if (ops->free == NULL) | |
112 | return; | |
113 | ops->free(mp); | |
114 | } | |
115 | ||
116 | /* wrapper to get available objects in an external mempool. */ | |
117 | unsigned int | |
118 | rte_mempool_ops_get_count(const struct rte_mempool *mp) | |
119 | { | |
120 | struct rte_mempool_ops *ops; | |
121 | ||
122 | ops = rte_mempool_get_ops(mp->ops_index); | |
123 | return ops->get_count(mp); | |
124 | } | |
125 | ||
126 | /* sets mempool ops previously registered by rte_mempool_register_ops. */ | |
127 | int | |
128 | rte_mempool_set_ops_byname(struct rte_mempool *mp, const char *name, | |
129 | void *pool_config) | |
130 | { | |
131 | struct rte_mempool_ops *ops = NULL; | |
132 | unsigned i; | |
133 | ||
134 | /* too late, the mempool is already populated. */ | |
135 | if (mp->flags & MEMPOOL_F_POOL_CREATED) | |
136 | return -EEXIST; | |
137 | ||
138 | for (i = 0; i < rte_mempool_ops_table.num_ops; i++) { | |
139 | if (!strcmp(name, | |
140 | rte_mempool_ops_table.ops[i].name)) { | |
141 | ops = &rte_mempool_ops_table.ops[i]; | |
142 | break; | |
143 | } | |
144 | } | |
145 | ||
146 | if (ops == NULL) | |
147 | return -EINVAL; | |
148 | ||
149 | mp->ops_index = i; | |
150 | mp->pool_config = pool_config; | |
151 | return 0; | |
152 | } |