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 * Each ACL RT contains an idle nomatch node:
81 * a SINGLE node at predefined position (RTE_ACL_DFA_SIZE)
82 * that points to itself.
84 #define RTE_ACL_IDLE_NODE (RTE_ACL_DFA_SIZE | RTE_ACL_NODE_SINGLE)
87 * Structure of a node is a set of ptrs and each ptr has a bit map
88 * of values associated with this transition.
90 struct rte_acl_ptr_set {
91 struct rte_acl_bitset values; /* input values associated with ptr */
92 struct rte_acl_node *ptr; /* transition to next node */
95 struct rte_acl_classifier_results {
96 int results[RTE_ACL_MAX_CATEGORIES];
99 struct rte_acl_match_results {
100 uint32_t results[RTE_ACL_MAX_CATEGORIES];
101 int32_t priority[RTE_ACL_MAX_CATEGORIES];
104 struct rte_acl_node {
105 uint64_t node_index; /* index for this node */
106 uint32_t level; /* level 0-n in the trie */
107 uint32_t ref_count; /* ref count for this node */
108 struct rte_acl_bitset values;
109 /* set of all values that map to another node
110 * (union of bits in each transition.
112 uint32_t num_ptrs; /* number of ptr_set in use */
113 uint32_t max_ptrs; /* number of allocated ptr_set */
114 uint32_t min_add; /* number of ptr_set per allocation */
115 struct rte_acl_ptr_set *ptrs; /* transitions array for this node */
117 int32_t match_index; /* index to match data */
120 /* number of ranges (transitions w/ consecutive bits) */
122 struct rte_acl_match_results *mrt; /* only valid when match_flag != 0 */
124 char transitions[RTE_ACL_QUAD_SIZE];
125 /* boundaries for ranged node */
126 uint8_t dfa_gr64[RTE_ACL_DFA_GR64_NUM];
128 struct rte_acl_node *next;
129 /* free list link or pointer to duplicate node during merge */
130 struct rte_acl_node *prev;
131 /* points to node from which this node was duplicated */
135 * Types of tries used to generate runtime structure(s)
138 RTE_ACL_FULL_TRIE = 0,
139 RTE_ACL_NOSRC_TRIE = 1,
140 RTE_ACL_NODST_TRIE = 2,
141 RTE_ACL_NOPORTS_TRIE = 4,
142 RTE_ACL_NOVLAN_TRIE = 8,
143 RTE_ACL_UNUSED_TRIE = 0x80000000
147 /** MAX number of tries per one ACL context.*/
148 #define RTE_ACL_MAX_TRIES 8
150 /** Max number of characters in PM name.*/
151 #define RTE_ACL_NAMESIZE 32
154 struct rte_acl_trie {
158 const uint32_t *data_index;
159 uint32_t num_data_indexes;
162 struct rte_acl_bld_trie {
163 struct rte_acl_node *trie;
167 char name[RTE_ACL_NAMESIZE];
168 /** Name of the ACL context. */
170 /** Socket ID to allocate memory from. */
171 enum rte_acl_classify_alg alg;
172 uint32_t first_load_sz;
177 uint32_t num_categories;
179 uint32_t match_index;
182 uint64_t *trans_table;
183 uint32_t *data_indexes;
184 struct rte_acl_trie trie[RTE_ACL_MAX_TRIES];
187 struct rte_acl_config config; /* copy of build config. */
190 int rte_acl_gen(struct rte_acl_ctx *ctx, struct rte_acl_trie *trie,
191 struct rte_acl_bld_trie *node_bld_trie, uint32_t num_tries,
192 uint32_t num_categories, uint32_t data_index_sz, size_t max_size);
194 typedef int (*rte_acl_classify_t)
195 (const struct rte_acl_ctx *, const uint8_t **, uint32_t *, uint32_t, uint32_t);
198 * Different implementations of ACL classify.
201 rte_acl_classify_scalar(const struct rte_acl_ctx *ctx, const uint8_t **data,
202 uint32_t *results, uint32_t num, uint32_t categories);
205 rte_acl_classify_sse(const struct rte_acl_ctx *ctx, const uint8_t **data,
206 uint32_t *results, uint32_t num, uint32_t categories);
209 rte_acl_classify_avx2(const struct rte_acl_ctx *ctx, const uint8_t **data,
210 uint32_t *results, uint32_t num, uint32_t categories);
213 rte_acl_classify_avx512x16(const struct rte_acl_ctx *ctx, const uint8_t **data,
214 uint32_t *results, uint32_t num, uint32_t categories);
217 rte_acl_classify_avx512x32(const struct rte_acl_ctx *ctx, const uint8_t **data,
218 uint32_t *results, uint32_t num, uint32_t categories);
221 rte_acl_classify_neon(const struct rte_acl_ctx *ctx, const uint8_t **data,
222 uint32_t *results, uint32_t num, uint32_t categories);
225 rte_acl_classify_altivec(const struct rte_acl_ctx *ctx, const uint8_t **data,
226 uint32_t *results, uint32_t num, uint32_t categories);
230 #endif /* __cplusplus */