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/*
* Copyright (c) 2016 Intel Corporation.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <rte_errno.h>
#include <rte_malloc.h>
#include <rte_log.h>
#include "buf_cage.h"
#include "osdep.h"
struct bcg_store *
bcg_create(const struct bcg_store_prm *prm)
{
struct buf_cage *bc;
struct bcg_store *st;
uintptr_t end, p;
size_t sz, tsz;
uint32_t n;
if (prm == NULL || (prm->cage_align != 0 &&
rte_is_power_of_2(prm->cage_align) == 0)) {
rte_errno = EINVAL;
return NULL;
}
/* number of cages required. */
n = (prm->max_bufs + prm->cage_bufs - 1) / prm->cage_bufs;
n = RTE_MAX(n, prm->min_cages);
/* size of each cage. */
sz = prm->cage_bufs * sizeof(bc->bufs[0]) + sizeof(*bc);
sz = RTE_ALIGN_CEIL(sz, prm->cage_align);
/* total number of bytes required. */
tsz = n * sz + RTE_ALIGN_CEIL(sizeof(*st), prm->cage_align);
st = rte_zmalloc_socket(NULL, tsz, RTE_CACHE_LINE_SIZE, prm->socket_id);
if (st == NULL) {
UDP_LOG(ERR, "%s: allocation of %zu bytes on "
"socket %d failed\n",
__func__, tsz, prm->socket_id);
return NULL;
}
st->prm = prm[0];
bcg_queue_reset(&st->free);
p = (uintptr_t)RTE_PTR_ALIGN_CEIL((st + 1), prm->cage_align);
end = p + n * sz;
for (; p != end; p += sz) {
bc = (struct buf_cage *)p;
bc->st = st;
bc->num = prm->cage_bufs;
STAILQ_INSERT_TAIL(&st->free.queue, bc, ql);
}
st->free.num = n;
st->nb_cages = n;
st->cage_sz = sz;
st->total_sz = tsz;
return st;
}
void
bcg_destroy(struct bcg_store *st)
{
rte_free(st);
}
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