1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2010-2014 Intel Corporation
10 #endif /* __cplusplus */
12 #define RTE_ACL_QUAD_MAX 5
13 #define RTE_ACL_QUAD_SIZE 4
14 #define RTE_ACL_QUAD_SINGLE UINT64_C(0x7f7f7f7f00000000)
16 #define RTE_ACL_SINGLE_TRIE_SIZE 2000
18 #define RTE_ACL_DFA_MAX UINT8_MAX
19 #define RTE_ACL_DFA_SIZE (UINT8_MAX + 1)
21 #define RTE_ACL_DFA_GR64_SIZE 64
22 #define RTE_ACL_DFA_GR64_NUM (RTE_ACL_DFA_SIZE / RTE_ACL_DFA_GR64_SIZE)
23 #define RTE_ACL_DFA_GR64_BIT \
24 (CHAR_BIT * sizeof(uint32_t) / RTE_ACL_DFA_GR64_NUM)
28 #define RTE_ACL_BIT_SET_SIZE ((UINT8_MAX + 1) / (sizeof(bits_t) * CHAR_BIT))
30 struct rte_acl_bitset {
31 bits_t bits[RTE_ACL_BIT_SET_SIZE];
34 #define RTE_ACL_NODE_DFA (0 << RTE_ACL_TYPE_SHIFT)
35 #define RTE_ACL_NODE_SINGLE (1U << RTE_ACL_TYPE_SHIFT)
36 #define RTE_ACL_NODE_QRANGE (3U << RTE_ACL_TYPE_SHIFT)
37 #define RTE_ACL_NODE_MATCH (4U << RTE_ACL_TYPE_SHIFT)
38 #define RTE_ACL_NODE_TYPE (7U << RTE_ACL_TYPE_SHIFT)
39 #define RTE_ACL_NODE_UNDEFINED UINT32_MAX
42 * ACL RT structure is a set of multibit tries (with stride == 8)
43 * represented by an array of transitions. The next position is calculated
44 * based on the current position and the input byte.
45 * Each transition is 64 bit value with the following format:
46 * | node_type_specific : 32 | node_type : 3 | node_addr : 29 |
47 * For all node types except RTE_ACL_NODE_MATCH, node_addr is an index
48 * to the start of the node in the transtions array.
49 * Few different node types are used:
51 * node_addr value is and index into an array that contains the return value
52 * and its priority for each category.
53 * Upper 32 bits of the transition value are not used for that node type.
54 * RTE_ACL_NODE_QRANGE:
55 * that node consist of up to 5 transitions.
56 * Upper 32 bits are interpreted as 4 signed character values which
57 * are ordered from smallest(INT8_MIN) to largest (INT8_MAX).
58 * These values define 5 ranges:
59 * INT8_MIN <= range[0] <= ((int8_t *)&transition)[4]
60 * ((int8_t *)&transition)[4] < range[1] <= ((int8_t *)&transition)[5]
61 * ((int8_t *)&transition)[5] < range[2] <= ((int8_t *)&transition)[6]
62 * ((int8_t *)&transition)[6] < range[3] <= ((int8_t *)&transition)[7]
63 * ((int8_t *)&transition)[7] < range[4] <= INT8_MAX
64 * So for input byte value within range[i] i-th transition within that node
66 * RTE_ACL_NODE_SINGLE:
67 * always transitions to the same node regardless of the input value.
69 * that node consits of up to 256 transitions.
70 * In attempt to conserve space all transitions are divided into 4 consecutive
71 * groups, by 64 transitions per group:
72 * group64[i] contains transitions[i * 64, .. i * 64 + 63].
73 * Upper 32 bits are interpreted as 4 unsigned character values one per group,
74 * which contain index to the start of the given group within the node.
75 * So to calculate transition index within the node for given input byte value:
76 * input_byte - ((uint8_t *)&transition)[4 + input_byte / 64].
80 * Structure of a node is a set of ptrs and each ptr has a bit map
81 * of values associated with this transition.
83 struct rte_acl_ptr_set {
84 struct rte_acl_bitset values; /* input values associated with ptr */
85 struct rte_acl_node *ptr; /* transition to next node */
88 struct rte_acl_classifier_results {
89 int results[RTE_ACL_MAX_CATEGORIES];
92 struct rte_acl_match_results {
93 uint32_t results[RTE_ACL_MAX_CATEGORIES];
94 int32_t priority[RTE_ACL_MAX_CATEGORIES];
98 uint64_t node_index; /* index for this node */
99 uint32_t level; /* level 0-n in the trie */
100 uint32_t ref_count; /* ref count for this node */
101 struct rte_acl_bitset values;
102 /* set of all values that map to another node
103 * (union of bits in each transition.
105 uint32_t num_ptrs; /* number of ptr_set in use */
106 uint32_t max_ptrs; /* number of allocated ptr_set */
107 uint32_t min_add; /* number of ptr_set per allocation */
108 struct rte_acl_ptr_set *ptrs; /* transitions array for this node */
110 int32_t match_index; /* index to match data */
113 /* number of ranges (transitions w/ consecutive bits) */
115 struct rte_acl_match_results *mrt; /* only valid when match_flag != 0 */
117 char transitions[RTE_ACL_QUAD_SIZE];
118 /* boundaries for ranged node */
119 uint8_t dfa_gr64[RTE_ACL_DFA_GR64_NUM];
121 struct rte_acl_node *next;
122 /* free list link or pointer to duplicate node during merge */
123 struct rte_acl_node *prev;
124 /* points to node from which this node was duplicated */
128 * Types of tries used to generate runtime structure(s)
131 RTE_ACL_FULL_TRIE = 0,
132 RTE_ACL_NOSRC_TRIE = 1,
133 RTE_ACL_NODST_TRIE = 2,
134 RTE_ACL_NOPORTS_TRIE = 4,
135 RTE_ACL_NOVLAN_TRIE = 8,
136 RTE_ACL_UNUSED_TRIE = 0x80000000
140 /** MAX number of tries per one ACL context.*/
141 #define RTE_ACL_MAX_TRIES 8
143 /** Max number of characters in PM name.*/
144 #define RTE_ACL_NAMESIZE 32
147 struct rte_acl_trie {
151 const uint32_t *data_index;
152 uint32_t num_data_indexes;
155 struct rte_acl_bld_trie {
156 struct rte_acl_node *trie;
160 char name[RTE_ACL_NAMESIZE];
161 /** Name of the ACL context. */
163 /** Socket ID to allocate memory from. */
164 enum rte_acl_classify_alg alg;
169 uint32_t num_categories;
171 uint32_t match_index;
174 uint64_t *trans_table;
175 uint32_t *data_indexes;
176 struct rte_acl_trie trie[RTE_ACL_MAX_TRIES];
179 struct rte_acl_config config; /* copy of build config. */
182 int rte_acl_gen(struct rte_acl_ctx *ctx, struct rte_acl_trie *trie,
183 struct rte_acl_bld_trie *node_bld_trie, uint32_t num_tries,
184 uint32_t num_categories, uint32_t data_index_sz, size_t max_size);
186 typedef int (*rte_acl_classify_t)
187 (const struct rte_acl_ctx *, const uint8_t **, uint32_t *, uint32_t, uint32_t);
190 * Different implementations of ACL classify.
193 rte_acl_classify_scalar(const struct rte_acl_ctx *ctx, const uint8_t **data,
194 uint32_t *results, uint32_t num, uint32_t categories);
197 rte_acl_classify_sse(const struct rte_acl_ctx *ctx, const uint8_t **data,
198 uint32_t *results, uint32_t num, uint32_t categories);
201 rte_acl_classify_avx2(const struct rte_acl_ctx *ctx, const uint8_t **data,
202 uint32_t *results, uint32_t num, uint32_t categories);
205 rte_acl_classify_neon(const struct rte_acl_ctx *ctx, const uint8_t **data,
206 uint32_t *results, uint32_t num, uint32_t categories);
209 rte_acl_classify_altivec(const struct rte_acl_ctx *ctx, const uint8_t **data,
210 uint32_t *results, uint32_t num, uint32_t categories);
214 #endif /* __cplusplus */