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/* 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;
}
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