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37 #include <rte_common.h>
39 #include <rte_memory.h>
40 #include <rte_malloc.h>
41 #include <rte_byteorder.h>
45 #include "rte_table_lpm.h"
47 #ifndef RTE_TABLE_LPM_MAX_NEXT_HOPS
48 #define RTE_TABLE_LPM_MAX_NEXT_HOPS 65536
51 #ifdef RTE_TABLE_STATS_COLLECT
53 #define RTE_TABLE_LPM_STATS_PKTS_IN_ADD(table, val) \
54 table->stats.n_pkts_in += val
55 #define RTE_TABLE_LPM_STATS_PKTS_LOOKUP_MISS(table, val) \
56 table->stats.n_pkts_lookup_miss += val
60 #define RTE_TABLE_LPM_STATS_PKTS_IN_ADD(table, val)
61 #define RTE_TABLE_LPM_STATS_PKTS_LOOKUP_MISS(table, val)
65 struct rte_table_lpm {
66 struct rte_table_stats stats;
68 /* Input parameters */
70 uint32_t entry_unique_size;
74 /* Handle to low-level LPM table */
77 /* Next Hop Table (NHT) */
78 uint32_t nht_users[RTE_TABLE_LPM_MAX_NEXT_HOPS];
79 uint8_t nht[0] __rte_cache_aligned;
83 rte_table_lpm_create(void *params, int socket_id, uint32_t entry_size)
85 struct rte_table_lpm_params *p = (struct rte_table_lpm_params *) params;
86 struct rte_table_lpm *lpm;
87 struct rte_lpm_config lpm_config;
89 uint32_t total_size, nht_size;
91 /* Check input parameters */
93 RTE_LOG(ERR, TABLE, "%s: NULL input parameters\n", __func__);
96 if (p->n_rules == 0) {
97 RTE_LOG(ERR, TABLE, "%s: Invalid n_rules\n", __func__);
100 if (p->number_tbl8s == 0) {
101 RTE_LOG(ERR, TABLE, "%s: Invalid number_tbl8s\n", __func__);
104 if (p->entry_unique_size == 0) {
105 RTE_LOG(ERR, TABLE, "%s: Invalid entry_unique_size\n",
109 if (p->entry_unique_size > entry_size) {
110 RTE_LOG(ERR, TABLE, "%s: Invalid entry_unique_size\n",
114 if (p->name == NULL) {
115 RTE_LOG(ERR, TABLE, "%s: Table name is NULL\n",
119 entry_size = RTE_ALIGN(entry_size, sizeof(uint64_t));
121 /* Memory allocation */
122 nht_size = RTE_TABLE_LPM_MAX_NEXT_HOPS * entry_size;
123 total_size = sizeof(struct rte_table_lpm) + nht_size;
124 lpm = rte_zmalloc_socket("TABLE", total_size, RTE_CACHE_LINE_SIZE,
128 "%s: Cannot allocate %u bytes for LPM table\n",
129 __func__, total_size);
133 /* LPM low-level table creation */
134 lpm_config.max_rules = p->n_rules;
135 lpm_config.number_tbl8s = p->number_tbl8s;
136 lpm_config.flags = p->flags;
137 lpm->lpm = rte_lpm_create(p->name, socket_id, &lpm_config);
139 if (lpm->lpm == NULL) {
141 RTE_LOG(ERR, TABLE, "Unable to create low-level LPM table\n");
145 /* Memory initialization */
146 lpm->entry_size = entry_size;
147 lpm->entry_unique_size = p->entry_unique_size;
148 lpm->n_rules = p->n_rules;
149 lpm->offset = p->offset;
155 rte_table_lpm_free(void *table)
157 struct rte_table_lpm *lpm = (struct rte_table_lpm *) table;
159 /* Check input parameters */
161 RTE_LOG(ERR, TABLE, "%s: table parameter is NULL\n", __func__);
165 /* Free previously allocated resources */
166 rte_lpm_free(lpm->lpm);
173 nht_find_free(struct rte_table_lpm *lpm, uint32_t *pos)
177 for (i = 0; i < RTE_TABLE_LPM_MAX_NEXT_HOPS; i++) {
178 if (lpm->nht_users[i] == 0) {
188 nht_find_existing(struct rte_table_lpm *lpm, void *entry, uint32_t *pos)
192 for (i = 0; i < RTE_TABLE_LPM_MAX_NEXT_HOPS; i++) {
193 uint8_t *nht_entry = &lpm->nht[i * lpm->entry_size];
195 if ((lpm->nht_users[i] > 0) && (memcmp(nht_entry, entry,
196 lpm->entry_unique_size) == 0)) {
206 rte_table_lpm_entry_add(
213 struct rte_table_lpm *lpm = (struct rte_table_lpm *) table;
214 struct rte_table_lpm_key *ip_prefix = (struct rte_table_lpm_key *) key;
215 uint32_t nht_pos, nht_pos0_valid;
217 uint32_t nht_pos0 = 0;
219 /* Check input parameters */
221 RTE_LOG(ERR, TABLE, "%s: table parameter is NULL\n", __func__);
224 if (ip_prefix == NULL) {
225 RTE_LOG(ERR, TABLE, "%s: ip_prefix parameter is NULL\n",
230 RTE_LOG(ERR, TABLE, "%s: entry parameter is NULL\n", __func__);
234 if ((ip_prefix->depth == 0) || (ip_prefix->depth > 32)) {
235 RTE_LOG(ERR, TABLE, "%s: invalid depth (%d)\n",
236 __func__, ip_prefix->depth);
240 /* Check if rule is already present in the table */
241 status = rte_lpm_is_rule_present(lpm->lpm, ip_prefix->ip,
242 ip_prefix->depth, &nht_pos0);
243 nht_pos0_valid = status > 0;
245 /* Find existing or free NHT entry */
246 if (nht_find_existing(lpm, entry, &nht_pos) == 0) {
249 if (nht_find_free(lpm, &nht_pos) == 0) {
250 RTE_LOG(ERR, TABLE, "%s: NHT full\n", __func__);
254 nht_entry = &lpm->nht[nht_pos * lpm->entry_size];
255 memcpy(nht_entry, entry, lpm->entry_size);
258 /* Add rule to low level LPM table */
259 if (rte_lpm_add(lpm->lpm, ip_prefix->ip, ip_prefix->depth, nht_pos) < 0) {
260 RTE_LOG(ERR, TABLE, "%s: LPM rule add failed\n", __func__);
264 /* Commit NHT changes */
265 lpm->nht_users[nht_pos]++;
266 lpm->nht_users[nht_pos0] -= nht_pos0_valid;
268 *key_found = nht_pos0_valid;
269 *entry_ptr = (void *) &lpm->nht[nht_pos * lpm->entry_size];
274 rte_table_lpm_entry_delete(
280 struct rte_table_lpm *lpm = (struct rte_table_lpm *) table;
281 struct rte_table_lpm_key *ip_prefix = (struct rte_table_lpm_key *) key;
285 /* Check input parameters */
287 RTE_LOG(ERR, TABLE, "%s: table parameter is NULL\n", __func__);
290 if (ip_prefix == NULL) {
291 RTE_LOG(ERR, TABLE, "%s: ip_prefix parameter is NULL\n",
295 if ((ip_prefix->depth == 0) || (ip_prefix->depth > 32)) {
296 RTE_LOG(ERR, TABLE, "%s: invalid depth (%d)\n", __func__,
301 /* Return if rule is not present in the table */
302 status = rte_lpm_is_rule_present(lpm->lpm, ip_prefix->ip,
303 ip_prefix->depth, &nht_pos);
305 RTE_LOG(ERR, TABLE, "%s: LPM algorithmic error\n", __func__);
313 /* Delete rule from the low-level LPM table */
314 status = rte_lpm_delete(lpm->lpm, ip_prefix->ip, ip_prefix->depth);
316 RTE_LOG(ERR, TABLE, "%s: LPM rule delete failed\n", __func__);
320 /* Commit NHT changes */
321 lpm->nht_users[nht_pos]--;
325 memcpy(entry, &lpm->nht[nht_pos * lpm->entry_size],
332 rte_table_lpm_lookup(
334 struct rte_mbuf **pkts,
336 uint64_t *lookup_hit_mask,
339 struct rte_table_lpm *lpm = (struct rte_table_lpm *) table;
340 uint64_t pkts_out_mask = 0;
343 __rte_unused uint32_t n_pkts_in = __builtin_popcountll(pkts_mask);
344 RTE_TABLE_LPM_STATS_PKTS_IN_ADD(lpm, n_pkts_in);
347 for (i = 0; i < (uint32_t)(RTE_PORT_IN_BURST_SIZE_MAX -
348 __builtin_clzll(pkts_mask)); i++) {
349 uint64_t pkt_mask = 1LLU << i;
351 if (pkt_mask & pkts_mask) {
352 struct rte_mbuf *pkt = pkts[i];
353 uint32_t ip = rte_bswap32(
354 RTE_MBUF_METADATA_UINT32(pkt, lpm->offset));
358 status = rte_lpm_lookup(lpm->lpm, ip, &nht_pos);
360 pkts_out_mask |= pkt_mask;
361 entries[i] = (void *) &lpm->nht[nht_pos *
367 *lookup_hit_mask = pkts_out_mask;
368 RTE_TABLE_LPM_STATS_PKTS_LOOKUP_MISS(lpm, n_pkts_in - __builtin_popcountll(pkts_out_mask));
373 rte_table_lpm_stats_read(void *table, struct rte_table_stats *stats, int clear)
375 struct rte_table_lpm *t = (struct rte_table_lpm *) table;
378 memcpy(stats, &t->stats, sizeof(t->stats));
381 memset(&t->stats, 0, sizeof(t->stats));
386 struct rte_table_ops rte_table_lpm_ops = {
387 .f_create = rte_table_lpm_create,
388 .f_free = rte_table_lpm_free,
389 .f_add = rte_table_lpm_entry_add,
390 .f_delete = rte_table_lpm_entry_delete,
392 .f_delete_bulk = NULL,
393 .f_lookup = rte_table_lpm_lookup,
394 .f_stats = rte_table_lpm_stats_read,