summaryrefslogtreecommitdiffstats
path: root/lib/librte_mempool/rte_mempool_ops.c
blob: 0732255c020419d9d3731e69540f442f6cbe626a (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
/* SPDX-License-Identifier: BSD-3-Clause
 * Copyright(c) 2016 Intel Corporation.
 * Copyright(c) 2016 6WIND S.A.
 */

#include <stdio.h>
#include <string.h>

#include <rte_mempool.h>
#include <rte_errno.h>
#include <rte_dev.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;
	ops->get_capabilities = h->get_capabilities;
	ops->register_memory_area = h->register_memory_area;

	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);
}

/* wrapper to get external mempool capabilities. */
int
rte_mempool_ops_get_capabilities(const struct rte_mempool *mp,
					unsigned int *flags)
{
	struct rte_mempool_ops *ops;

	ops = rte_mempool_get_ops(mp->ops_index);

	RTE_FUNC_PTR_OR_ERR_RET(ops->get_capabilities, -ENOTSUP);
	return ops->get_capabilities(mp, flags);
}

/* wrapper to notify new memory area to external mempool */
int
rte_mempool_ops_register_memory_area(const struct rte_mempool *mp, char *vaddr,
					rte_iova_t iova, size_t len)
{
	struct rte_mempool_ops *ops;

	ops = rte_mempool_get_ops(mp->ops_index);

	RTE_FUNC_PTR_OR_ERR_RET(ops->register_memory_area, -ENOTSUP);
	return ops->register_memory_area(mp, vaddr, iova, len);
}

/* 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;
}