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/*-
* BSD LICENSE
*
* Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
* 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 <stddef.h>
#include <stdio.h>
#include <rte_memory.h>
#include <rte_log.h>
#include "ip_frag_common.h"
#define IP_FRAG_HASH_FNUM 2
/* free mbufs from death row */
void
rte_ip_frag_free_death_row(struct rte_ip_frag_death_row *dr,
uint32_t prefetch)
{
uint32_t i, k, n;
k = RTE_MIN(prefetch, dr->cnt);
n = dr->cnt;
for (i = 0; i != k; i++)
rte_prefetch0(dr->row[i]);
for (i = 0; i != n - k; i++) {
rte_prefetch0(dr->row[i + k]);
rte_pktmbuf_free(dr->row[i]);
}
for (; i != n; i++)
rte_pktmbuf_free(dr->row[i]);
dr->cnt = 0;
}
/* create fragmentation table */
struct rte_ip_frag_tbl *
rte_ip_frag_table_create(uint32_t bucket_num, uint32_t bucket_entries,
uint32_t max_entries, uint64_t max_cycles, int socket_id)
{
struct rte_ip_frag_tbl *tbl;
size_t sz;
uint64_t nb_entries;
nb_entries = rte_align32pow2(bucket_num);
nb_entries *= bucket_entries;
nb_entries *= IP_FRAG_HASH_FNUM;
/* check input parameters. */
if (rte_is_power_of_2(bucket_entries) == 0 ||
nb_entries > UINT32_MAX || nb_entries == 0 ||
nb_entries < max_entries) {
RTE_LOG(ERR, USER1, "%s: invalid input parameter\n", __func__);
return NULL;
}
sz = sizeof (*tbl) + nb_entries * sizeof (tbl->pkt[0]);
if ((tbl = rte_zmalloc_socket(__func__, sz, RTE_CACHE_LINE_SIZE,
socket_id)) == NULL) {
RTE_LOG(ERR, USER1,
"%s: allocation of %zu bytes at socket %d failed do\n",
__func__, sz, socket_id);
return NULL;
}
RTE_LOG(INFO, USER1, "%s: allocated of %zu bytes at socket %d\n",
__func__, sz, socket_id);
tbl->max_cycles = max_cycles;
tbl->max_entries = max_entries;
tbl->nb_entries = (uint32_t)nb_entries;
tbl->nb_buckets = bucket_num;
tbl->bucket_entries = bucket_entries;
tbl->entry_mask = (tbl->nb_entries - 1) & ~(tbl->bucket_entries - 1);
TAILQ_INIT(&(tbl->lru));
return tbl;
}
/* delete fragmentation table */
void
rte_ip_frag_table_destroy(struct rte_ip_frag_tbl *tbl)
{
struct ip_frag_pkt *fp;
TAILQ_FOREACH(fp, &tbl->lru, lru) {
ip_frag_free_immediate(fp);
}
rte_free(tbl);
}
/* dump frag table statistics to file */
void
rte_ip_frag_table_statistics_dump(FILE *f, const struct rte_ip_frag_tbl *tbl)
{
uint64_t fail_total, fail_nospace;
fail_total = tbl->stat.fail_total;
fail_nospace = tbl->stat.fail_nospace;
fprintf(f, "max entries:\t%u;\n"
"entries in use:\t%u;\n"
"finds/inserts:\t%" PRIu64 ";\n"
"entries added:\t%" PRIu64 ";\n"
"entries deleted by timeout:\t%" PRIu64 ";\n"
"entries reused by timeout:\t%" PRIu64 ";\n"
"total add failures:\t%" PRIu64 ";\n"
"add no-space failures:\t%" PRIu64 ";\n"
"add hash-collisions failures:\t%" PRIu64 ";\n",
tbl->max_entries,
tbl->use_entries,
tbl->stat.find_num,
tbl->stat.add_num,
tbl->stat.del_num,
tbl->stat.reuse_num,
fail_total,
fail_nospace,
fail_total - fail_nospace);
}
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