Imported Upstream version 16.04

[deb_dpdk.git] / lib / librte_ip_frag / rte_ip_frag_common.c

diff --git a/lib/librte_ip_frag/rte_ip_frag_common.c b/lib/librte_ip_frag/rte_ip_frag_common.c
new file mode 100644 (file)
index 0000000..6176ff4
--- /dev/null
+++ b/lib/librte_ip_frag/rte_ip_frag_common.c
@@ -0,0 +1,139 @@
+/*-
+ *   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;
+}
+
+/* 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);
+}