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/*-
* 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->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;
}
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