1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2018 Vladimir Medvedkin <medvedkinv@gmail.com>
3 * Copyright(c) 2019 Intel Corporation
16 * All functions in this file may be changed or removed without prior notice.
18 * FIB (Forwarding information base) implementation
19 * for IPv6 Longest Prefix Match
24 #include <rte_compat.h>
30 #define RTE_FIB6_IPV6_ADDR_SIZE 16
31 /** Maximum depth value possible for IPv6 FIB. */
32 #define RTE_FIB6_MAXDEPTH 128
37 /** Type of FIB struct */
39 RTE_FIB6_DUMMY, /**< RIB6 tree based FIB */
40 RTE_FIB6_TRIE /**< TRIE based fib */
43 /** Modify FIB function */
44 typedef int (*rte_fib6_modify_fn_t)(struct rte_fib6 *fib,
45 const uint8_t ip[RTE_FIB6_IPV6_ADDR_SIZE], uint8_t depth,
46 uint64_t next_hop, int op);
47 /** FIB bulk lookup function */
48 typedef void (*rte_fib6_lookup_fn_t)(void *fib,
49 uint8_t ips[][RTE_FIB6_IPV6_ADDR_SIZE],
50 uint64_t *next_hops, const unsigned int n);
57 /** Size of nexthop (1 << nh_sz) bits for TRIE based FIB */
58 enum rte_fib_trie_nh_sz {
64 /** Type of lookup function implementation */
65 enum rte_fib6_lookup_type {
66 RTE_FIB6_LOOKUP_DEFAULT,
67 /**< Selects the best implementation based on the max simd bitwidth */
68 RTE_FIB6_LOOKUP_TRIE_SCALAR, /**< Scalar lookup function implementation*/
69 RTE_FIB6_LOOKUP_TRIE_VECTOR_AVX512 /**< Vector implementation using AVX512 */
72 /** FIB configuration structure */
73 struct rte_fib6_conf {
74 enum rte_fib6_type type; /**< Type of FIB struct */
75 /** Default value returned on lookup if there is no route */
80 enum rte_fib_trie_nh_sz nh_sz;
92 * NUMA socket ID for FIB table memory allocation
94 * Structure containing the configuration
96 * Handle to FIB object on success
97 * NULL otherwise with rte_errno set to an appropriate values.
101 rte_fib6_create(const char *name, int socket_id, struct rte_fib6_conf *conf);
104 * Find an existing FIB object and return a pointer to it.
107 * Name of the fib object as passed to rte_fib6_create()
109 * Pointer to fib object or NULL if object not found with rte_errno
110 * set appropriately. Possible rte_errno values include:
111 * - ENOENT - required entry not available to return.
115 rte_fib6_find_existing(const char *name);
118 * Free an FIB object.
127 rte_fib6_free(struct rte_fib6 *fib);
130 * Add a route to the FIB.
135 * IPv6 prefix address to be added to the FIB
139 * Next hop to be added to the FIB
141 * 0 on success, negative value otherwise
145 rte_fib6_add(struct rte_fib6 *fib, const uint8_t ip[RTE_FIB6_IPV6_ADDR_SIZE],
146 uint8_t depth, uint64_t next_hop);
149 * Delete a rule from the FIB.
154 * IPv6 prefix address to be deleted from the FIB
158 * 0 on success, negative value otherwise
162 rte_fib6_delete(struct rte_fib6 *fib,
163 const uint8_t ip[RTE_FIB6_IPV6_ADDR_SIZE], uint8_t depth);
166 * Lookup multiple IP addresses in the FIB.
171 * Array of IPv6s to be looked up in the FIB
173 * Next hop of the most specific rule found for IP.
174 * This is an array of eight byte values.
175 * If the lookup for the given IP failed, then corresponding element would
176 * contain default nexthop value configured for a FIB.
178 * Number of elements in ips (and next_hops) array to lookup.
180 * -EINVAL for incorrect arguments, otherwise 0
184 rte_fib6_lookup_bulk(struct rte_fib6 *fib,
185 uint8_t ips[][RTE_FIB6_IPV6_ADDR_SIZE],
186 uint64_t *next_hops, int n);
189 * Get pointer to the dataplane specific struct
194 * Pointer on the dataplane struct on success
199 rte_fib6_get_dp(struct rte_fib6 *fib);
202 * Get pointer to the RIB6
207 * Pointer on the RIB6 on success
212 rte_fib6_get_rib(struct rte_fib6 *fib);
215 * Set lookup function based on type
220 * type of lookup function
228 rte_fib6_select_lookup(struct rte_fib6 *fib, enum rte_fib6_lookup_type type);
234 #endif /* _RTE_FIB6_H_ */