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 IPv4 Longest Prefix Match
24 #include <rte_compat.h>
33 /** Maximum depth value possible for IPv4 FIB. */
34 #define RTE_FIB_MAXDEPTH 32
36 /** Type of FIB struct */
38 RTE_FIB_DUMMY, /**< RIB tree based FIB */
39 RTE_FIB_DIR24_8 /**< DIR24_8 based FIB */
42 /** Modify FIB function */
43 typedef int (*rte_fib_modify_fn_t)(struct rte_fib *fib, uint32_t ip,
44 uint8_t depth, uint64_t next_hop, int op);
45 /** FIB bulk lookup function */
46 typedef void (*rte_fib_lookup_fn_t)(void *fib, const uint32_t *ips,
47 uint64_t *next_hops, const unsigned int n);
54 /** Size of nexthop (1 << nh_sz) bits for DIR24_8 based FIB */
55 enum rte_fib_dir24_8_nh_sz {
62 /** Type of lookup function implementation */
63 enum rte_fib_lookup_type {
64 RTE_FIB_LOOKUP_DEFAULT,
65 /**< Selects the best implementation based on the max simd bitwidth */
66 RTE_FIB_LOOKUP_DIR24_8_SCALAR_MACRO,
67 /**< Macro based lookup function */
68 RTE_FIB_LOOKUP_DIR24_8_SCALAR_INLINE,
70 * Lookup implementation using inlined functions
71 * for different next hop sizes
73 RTE_FIB_LOOKUP_DIR24_8_SCALAR_UNI,
75 * Unified lookup function for all next hop sizes
77 RTE_FIB_LOOKUP_DIR24_8_VECTOR_AVX512
78 /**< Vector implementation using AVX512 */
81 /** FIB configuration structure */
83 enum rte_fib_type type; /**< Type of FIB struct */
84 /** Default value returned on lookup if there is no route */
89 enum rte_fib_dir24_8_nh_sz nh_sz;
101 * NUMA socket ID for FIB table memory allocation
103 * Structure containing the configuration
105 * Handle to the FIB object on success
106 * NULL otherwise with rte_errno set to an appropriate values.
110 rte_fib_create(const char *name, int socket_id, struct rte_fib_conf *conf);
113 * Find an existing FIB object and return a pointer to it.
116 * Name of the fib object as passed to rte_fib_create()
118 * Pointer to fib object or NULL if object not found with rte_errno
119 * set appropriately. Possible rte_errno values include:
120 * - ENOENT - required entry not available to return.
124 rte_fib_find_existing(const char *name);
127 * Free an FIB object.
136 rte_fib_free(struct rte_fib *fib);
139 * Add a route to the FIB.
144 * IPv4 prefix address to be added to the FIB
148 * Next hop to be added to the FIB
150 * 0 on success, negative value otherwise
154 rte_fib_add(struct rte_fib *fib, uint32_t ip, uint8_t depth, uint64_t next_hop);
157 * Delete a rule from the FIB.
162 * IPv4 prefix address to be deleted from the FIB
166 * 0 on success, negative value otherwise
170 rte_fib_delete(struct rte_fib *fib, uint32_t ip, uint8_t depth);
173 * Lookup multiple IP addresses in the FIB.
178 * Array of IPs to be looked up in the FIB
180 * Next hop of the most specific rule found for IP.
181 * This is an array of eight byte values.
182 * If the lookup for the given IP failed, then corresponding element would
183 * contain default nexthop value configured for a FIB.
185 * Number of elements in ips (and next_hops) array to lookup.
187 * -EINVAL for incorrect arguments, otherwise 0
191 rte_fib_lookup_bulk(struct rte_fib *fib, uint32_t *ips,
192 uint64_t *next_hops, int n);
194 * Get pointer to the dataplane specific struct
199 * Pointer on the dataplane struct on success
204 rte_fib_get_dp(struct rte_fib *fib);
207 * Get pointer to the RIB
212 * Pointer on the RIB on success
217 rte_fib_get_rib(struct rte_fib *fib);
220 * Set lookup function based on type
225 * type of lookup function
233 rte_fib_select_lookup(struct rte_fib *fib, enum rte_fib_lookup_type type);
239 #endif /* _RTE_FIB_H_ */