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43 #include <rte_acl_osdep.h>
49 #define RTE_ACL_MAX_CATEGORIES 16
51 #define RTE_ACL_RESULTS_MULTIPLIER (XMM_SIZE / sizeof(uint32_t))
53 #define RTE_ACL_MAX_LEVELS 64
54 #define RTE_ACL_MAX_FIELDS 64
56 union rte_acl_field_types {
64 RTE_ACL_FIELD_TYPE_MASK = 0,
65 RTE_ACL_FIELD_TYPE_RANGE,
66 RTE_ACL_FIELD_TYPE_BITMASK
70 * ACL Field definition.
71 * Each field in the ACL rule has an associate definition.
72 * It defines the type of field, its size, its offset in the input buffer,
73 * the field index, and the input index.
74 * For performance reasons, the inner loop of the search function is unrolled
75 * to process four input bytes at a time. This requires the input to be grouped
76 * into sets of 4 consecutive bytes. The loop processes the first input byte as
77 * part of the setup and then subsequent bytes must be in groups of 4
80 struct rte_acl_field_def {
81 uint8_t type; /**< type - RTE_ACL_FIELD_TYPE_*. */
82 uint8_t size; /**< size of field 1,2,4, or 8. */
83 uint8_t field_index; /**< index of field inside the rule. */
84 uint8_t input_index; /**< 0-N input index. */
85 uint32_t offset; /**< offset to start of field. */
89 * ACL build configuration.
90 * Defines the fields of an ACL trie and number of categories to build with.
92 struct rte_acl_config {
93 uint32_t num_categories; /**< Number of categories to build with. */
94 uint32_t num_fields; /**< Number of field definitions. */
95 struct rte_acl_field_def defs[RTE_ACL_MAX_FIELDS];
96 /**< array of field definitions. */
98 /**< max memory limit for internal run-time structures. */
102 * Defines the value of a field for a rule.
104 struct rte_acl_field {
105 union rte_acl_field_types value;
106 /**< a 1,2,4, or 8 byte value of the field. */
107 union rte_acl_field_types mask_range;
109 * depending on field type:
110 * mask -> 1.2.3.4/32 value=0x1020304, mask_range=32,
111 * range -> 0 : 65535 value=0, mask_range=65535,
112 * bitmask -> 0x06/0xff value=6, mask_range=0xff.
117 RTE_ACL_TYPE_SHIFT = 29,
118 RTE_ACL_MAX_INDEX = RTE_LEN2MASK(RTE_ACL_TYPE_SHIFT, uint32_t),
119 RTE_ACL_MAX_PRIORITY = RTE_ACL_MAX_INDEX,
120 RTE_ACL_MIN_PRIORITY = 0,
123 #define RTE_ACL_MASKLEN_TO_BITMASK(v, s) \
124 ((v) == 0 ? (v) : (typeof(v))((uint64_t)-1 << ((s) * CHAR_BIT - (v))))
127 * Miscellaneous data for ACL rule.
129 struct rte_acl_rule_data {
130 uint32_t category_mask; /**< Mask of categories for that rule. */
131 int32_t priority; /**< Priority for that rule. */
132 uint32_t userdata; /**< Associated with the rule user data. */
136 * Defines single ACL rule.
137 * data - miscellaneous data for the rule.
138 * field[] - value and mask or range for each field.
140 #define RTE_ACL_RULE_DEF(name, fld_num) struct name {\
141 struct rte_acl_rule_data data; \
142 struct rte_acl_field field[fld_num]; \
145 RTE_ACL_RULE_DEF(rte_acl_rule,);
147 #define RTE_ACL_RULE_SZ(fld_num) \
148 (sizeof(struct rte_acl_rule) + sizeof(struct rte_acl_field) * (fld_num))
151 /** Max number of characters in name.*/
152 #define RTE_ACL_NAMESIZE 32
155 * Parameters used when creating the ACL context.
157 struct rte_acl_param {
158 const char *name; /**< Name of the ACL context. */
159 int socket_id; /**< Socket ID to allocate memory for. */
160 uint32_t rule_size; /**< Size of each rule. */
161 uint32_t max_rule_num; /**< Maximum number of rules. */
166 * Create a new ACL context.
169 * Parameters used to create and initialise the ACL context.
171 * Pointer to ACL context structure that is used in future ACL
172 * operations, or NULL on error, with error code set in rte_errno.
173 * Possible rte_errno errors include:
174 * - EINVAL - invalid parameter passed to function
177 rte_acl_create(const struct rte_acl_param *param);
180 * Find an existing ACL context object and return a pointer to it.
183 * Name of the ACL context as passed to rte_acl_create()
185 * Pointer to ACL context or NULL if object not found
186 * with rte_errno set appropriately. Possible rte_errno values include:
187 * - ENOENT - value not available for return
190 rte_acl_find_existing(const char *name);
193 * De-allocate all memory used by ACL context.
196 * ACL context to free
199 rte_acl_free(struct rte_acl_ctx *ctx);
202 * Add rules to an existing ACL context.
203 * This function is not multi-thread safe.
206 * ACL context to add patterns to.
208 * Array of rules to add to the ACL context.
209 * Note that all fields in rte_acl_rule structures are expected
210 * to be in host byte order.
211 * Each rule expected to be in the same format and not exceed size
212 * specified at ACL context creation time.
214 * Number of elements in the input array of rules.
216 * - -ENOMEM if there is no space in the ACL context for these rules.
217 * - -EINVAL if the parameters are invalid.
218 * - Zero if operation completed successfully.
221 rte_acl_add_rules(struct rte_acl_ctx *ctx, const struct rte_acl_rule *rules,
225 * Delete all rules from the ACL context.
226 * This function is not multi-thread safe.
227 * Note that internal run-time structures are not affected.
230 * ACL context to delete rules from.
233 rte_acl_reset_rules(struct rte_acl_ctx *ctx);
236 * Analyze set of rules and build required internal run-time structures.
237 * This function is not multi-thread safe.
240 * ACL context to build.
242 * Pointer to struct rte_acl_config - defines build parameters.
244 * - -ENOMEM if couldn't allocate enough memory.
245 * - -EINVAL if the parameters are invalid.
246 * - Negative error code if operation failed.
247 * - Zero if operation completed successfully.
250 rte_acl_build(struct rte_acl_ctx *ctx, const struct rte_acl_config *cfg);
253 * Delete all rules from the ACL context and
254 * destroy all internal run-time structures.
255 * This function is not multi-thread safe.
258 * ACL context to reset.
261 rte_acl_reset(struct rte_acl_ctx *ctx);
264 * Available implementations of ACL classify.
266 enum rte_acl_classify_alg {
267 RTE_ACL_CLASSIFY_DEFAULT = 0,
268 RTE_ACL_CLASSIFY_SCALAR = 1, /**< generic implementation. */
269 RTE_ACL_CLASSIFY_SSE = 2, /**< requires SSE4.1 support. */
270 RTE_ACL_CLASSIFY_AVX2 = 3, /**< requires AVX2 support. */
271 RTE_ACL_CLASSIFY_NEON = 4, /**< requires NEON support. */
272 RTE_ACL_CLASSIFY_ALTIVEC = 5, /**< requires ALTIVEC support. */
273 RTE_ACL_CLASSIFY_NUM /* should always be the last one. */
277 * Perform search for a matching ACL rule for each input data buffer.
278 * Each input data buffer can have up to *categories* matches.
279 * That implies that results array should be big enough to hold
280 * (categories * num) elements.
281 * Also categories parameter should be either one or multiple of
282 * RTE_ACL_RESULTS_MULTIPLIER and can't be bigger than RTE_ACL_MAX_CATEGORIES.
283 * If more than one rule is applicable for given input buffer and
284 * given category, then rule with highest priority will be returned as a match.
285 * Note, that it is a caller's responsibility to ensure that input parameters
286 * are valid and point to correct memory locations.
289 * ACL context to search with.
291 * Array of pointers to input data buffers to perform search.
292 * Note that all fields in input data buffers supposed to be in network
295 * Array of search results, *categories* results per each input data buffer.
297 * Number of elements in the input data buffers array.
299 * Number of maximum possible matches for each input buffer, one possible
300 * match per category.
302 * zero on successful completion.
303 * -EINVAL for incorrect arguments.
306 rte_acl_classify(const struct rte_acl_ctx *ctx,
307 const uint8_t **data,
308 uint32_t *results, uint32_t num,
309 uint32_t categories);
312 * Perform search using specified algorithm for a matching ACL rule for
313 * each input data buffer.
314 * Each input data buffer can have up to *categories* matches.
315 * That implies that results array should be big enough to hold
316 * (categories * num) elements.
317 * Also categories parameter should be either one or multiple of
318 * RTE_ACL_RESULTS_MULTIPLIER and can't be bigger than RTE_ACL_MAX_CATEGORIES.
319 * If more than one rule is applicable for given input buffer and
320 * given category, then rule with highest priority will be returned as a match.
321 * Note, that it is a caller's responsibility to ensure that input parameters
322 * are valid and point to correct memory locations.
325 * ACL context to search with.
327 * Array of pointers to input data buffers to perform search.
328 * Note that all fields in input data buffers supposed to be in network
331 * Array of search results, *categories* results per each input data buffer.
333 * Number of elements in the input data buffers array.
335 * Number of maximum possible matches for each input buffer, one possible
336 * match per category.
338 * Algorithm to be used for the search.
339 * It is the caller responsibility to ensure that the value refers to the
340 * existing algorithm, and that it could be run on the given CPU.
342 * zero on successful completion.
343 * -EINVAL for incorrect arguments.
346 rte_acl_classify_alg(const struct rte_acl_ctx *ctx,
347 const uint8_t **data,
348 uint32_t *results, uint32_t num,
350 enum rte_acl_classify_alg alg);
353 * Override the default classifier function for a given ACL context.
355 * ACL context to change classify function for.
357 * New default classify algorithm for given ACL context.
358 * It is the caller responsibility to ensure that the value refers to the
359 * existing algorithm, and that it could be run on the given CPU.
361 * - -EINVAL if the parameters are invalid.
362 * - Zero if operation completed successfully.
365 rte_acl_set_ctx_classify(struct rte_acl_ctx *ctx,
366 enum rte_acl_classify_alg alg);
369 * Dump an ACL context structure to the console.
372 * ACL context to dump.
375 rte_acl_dump(const struct rte_acl_ctx *ctx);
378 * Dump all ACL context structures to the console.
381 rte_acl_list_dump(void);
387 #endif /* _RTE_ACL_H_ */