summaryrefslogtreecommitdiffstats
path: root/lib/librte_table/rte_table_array.c
blob: 3bb68d112da571df3cc09173391bedc660ff2804 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
/*-
 *   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 <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 =
		(struct rte_table_array_params *) 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 = (struct rte_table_array *) 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 = (struct rte_table_array *) table;
	struct rte_table_array_key *k = (struct rte_table_array_key *) 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 = (struct rte_table_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,
};