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/* SPDX-License-Identifier: BSD-3-Clause
* Copyright(c) 2010-2014 Intel Corporation
*/
#include <string.h>
#include <stdio.h>
#include <rte_common.h>
#include <rte_mbuf.h>
#include <rte_memory.h>
#include <rte_malloc.h>
#include <rte_log.h>
#include "rte_table_array.h"
#ifdef RTE_TABLE_STATS_COLLECT
#define RTE_TABLE_ARRAY_STATS_PKTS_IN_ADD(table, val) \
table->stats.n_pkts_in += val
#define RTE_TABLE_ARRAY_STATS_PKTS_LOOKUP_MISS(table, val) \
table->stats.n_pkts_lookup_miss += val
#else
#define RTE_TABLE_ARRAY_STATS_PKTS_IN_ADD(table, val)
#define RTE_TABLE_ARRAY_STATS_PKTS_LOOKUP_MISS(table, val)
#endif
struct rte_table_array {
struct rte_table_stats stats;
/* Input parameters */
uint32_t entry_size;
uint32_t n_entries;
uint32_t offset;
/* Internal fields */
uint32_t entry_pos_mask;
/* Internal table */
uint8_t array[0] __rte_cache_aligned;
} __rte_cache_aligned;
static void *
rte_table_array_create(void *params, int socket_id, uint32_t entry_size)
{
struct rte_table_array_params *p = params;
struct rte_table_array *t;
uint32_t total_cl_size, total_size;
/* Check input parameters */
if ((p == NULL) ||
(p->n_entries == 0) ||
(!rte_is_power_of_2(p->n_entries)))
return NULL;
/* Memory allocation */
total_cl_size = (sizeof(struct rte_table_array) +
RTE_CACHE_LINE_SIZE) / RTE_CACHE_LINE_SIZE;
total_cl_size += (p->n_entries * entry_size +
RTE_CACHE_LINE_SIZE) / RTE_CACHE_LINE_SIZE;
total_size = total_cl_size * RTE_CACHE_LINE_SIZE;
t = rte_zmalloc_socket("TABLE", total_size, RTE_CACHE_LINE_SIZE, socket_id);
if (t == NULL) {
RTE_LOG(ERR, TABLE,
"%s: Cannot allocate %u bytes for array table\n",
__func__, total_size);
return NULL;
}
/* Memory initialization */
t->entry_size = entry_size;
t->n_entries = p->n_entries;
t->offset = p->offset;
t->entry_pos_mask = t->n_entries - 1;
return t;
}
static int
rte_table_array_free(void *table)
{
struct rte_table_array *t = table;
/* Check input parameters */
if (t == NULL) {
RTE_LOG(ERR, TABLE, "%s: table parameter is NULL\n", __func__);
return -EINVAL;
}
/* Free previously allocated resources */
rte_free(t);
return 0;
}
static int
rte_table_array_entry_add(
void *table,
void *key,
void *entry,
int *key_found,
void **entry_ptr)
{
struct rte_table_array *t = table;
struct rte_table_array_key *k = key;
uint8_t *table_entry;
/* Check input parameters */
if (table == NULL) {
RTE_LOG(ERR, TABLE, "%s: table parameter is NULL\n", __func__);
return -EINVAL;
}
if (key == NULL) {
RTE_LOG(ERR, TABLE, "%s: key parameter is NULL\n", __func__);
return -EINVAL;
}
if (entry == NULL) {
RTE_LOG(ERR, TABLE, "%s: entry parameter is NULL\n", __func__);
return -EINVAL;
}
if (key_found == NULL) {
RTE_LOG(ERR, TABLE, "%s: key_found parameter is NULL\n",
__func__);
return -EINVAL;
}
if (entry_ptr == NULL) {
RTE_LOG(ERR, TABLE, "%s: entry_ptr parameter is NULL\n",
__func__);
return -EINVAL;
}
table_entry = &t->array[k->pos * t->entry_size];
memcpy(table_entry, entry, t->entry_size);
*key_found = 1;
*entry_ptr = (void *) table_entry;
return 0;
}
static int
rte_table_array_lookup(
void *table,
struct rte_mbuf **pkts,
uint64_t pkts_mask,
uint64_t *lookup_hit_mask,
void **entries)
{
struct rte_table_array *t = (struct rte_table_array *) table;
__rte_unused uint32_t n_pkts_in = __builtin_popcountll(pkts_mask);
RTE_TABLE_ARRAY_STATS_PKTS_IN_ADD(t, n_pkts_in);
*lookup_hit_mask = pkts_mask;
if ((pkts_mask & (pkts_mask + 1)) == 0) {
uint64_t n_pkts = __builtin_popcountll(pkts_mask);
uint32_t i;
for (i = 0; i < n_pkts; i++) {
struct rte_mbuf *pkt = pkts[i];
uint32_t entry_pos = RTE_MBUF_METADATA_UINT32(pkt,
t->offset) & t->entry_pos_mask;
entries[i] = (void *) &t->array[entry_pos *
t->entry_size];
}
} else {
for ( ; pkts_mask; ) {
uint32_t pkt_index = __builtin_ctzll(pkts_mask);
uint64_t pkt_mask = 1LLU << pkt_index;
struct rte_mbuf *pkt = pkts[pkt_index];
uint32_t entry_pos = RTE_MBUF_METADATA_UINT32(pkt,
t->offset) & t->entry_pos_mask;
entries[pkt_index] = (void *) &t->array[entry_pos *
t->entry_size];
pkts_mask &= ~pkt_mask;
}
}
return 0;
}
static int
rte_table_array_stats_read(void *table, struct rte_table_stats *stats, int clear)
{
struct rte_table_array *array = table;
if (stats != NULL)
memcpy(stats, &array->stats, sizeof(array->stats));
if (clear)
memset(&array->stats, 0, sizeof(array->stats));
return 0;
}
struct rte_table_ops rte_table_array_ops = {
.f_create = rte_table_array_create,
.f_free = rte_table_array_free,
.f_add = rte_table_array_entry_add,
.f_delete = NULL,
.f_add_bulk = NULL,
.f_delete_bulk = NULL,
.f_lookup = rte_table_array_lookup,
.f_stats = rte_table_array_stats_read,
};
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