5a80bf0ae6
This patch provides table apis for dosig version of cuckoo hash via rte_table_hash_cuckoo_dosig_ops The following apis are implemented for cuckoo hash rte_table_hash_cuckoo_create rte_table_hash_cuckoo_free rte_table_hash_cuckoo_entry_add rte_table_hash_cuckoo_entry_delete rte_table_hash_cuckoo_lookup_dosig rte_table_hash_cuckoo_stats_read Signed-off-by: Sankar Chokkalingam <sankarx.chokkalingam@intel.com> Signed-off-by: Guruprasad Rao <guruprasadx.rao@intel.com> Acked-by: Cristian Dumitrescu <cristian.dumitrescu@intel.com>
400 lines
13 KiB
C
400 lines
13 KiB
C
/*-
|
|
* BSD LICENSE
|
|
*
|
|
* Copyright(c) 2010-2016 Intel Corporation. All rights reserved.
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
*
|
|
* * Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* * Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in
|
|
* the documentation and/or other materials provided with the
|
|
* distribution.
|
|
* * Neither the name of Intel Corporation nor the names of its
|
|
* contributors may be used to endorse or promote products derived
|
|
* from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
|
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
|
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
|
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#ifndef __INCLUDE_RTE_TABLE_HASH_H__
|
|
#define __INCLUDE_RTE_TABLE_HASH_H__
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
/**
|
|
* @file
|
|
* RTE Table Hash
|
|
*
|
|
* These tables use the exact match criterion to uniquely associate data to
|
|
* lookup keys.
|
|
*
|
|
* Use-cases: Flow classification table, Address Resolution Protocol (ARP) table
|
|
*
|
|
* Hash table types:
|
|
* 1. Entry add strategy on bucket full:
|
|
* a. Least Recently Used (LRU): One of the existing keys in the bucket is
|
|
* deleted and the new key is added in its place. The number of keys in
|
|
* each bucket never grows bigger than 4. The logic to pick the key to
|
|
* be dropped from the bucket is LRU. The hash table lookup operation
|
|
* maintains the order in which the keys in the same bucket are hit, so
|
|
* every time a key is hit, it becomes the new Most Recently Used (MRU)
|
|
* key, i.e. the most unlikely candidate for drop. When a key is added
|
|
* to the bucket, it also becomes the new MRU key. When a key needs to
|
|
* be picked and dropped, the most likely candidate for drop, i.e. the
|
|
* current LRU key, is always picked. The LRU logic requires maintaining
|
|
* specific data structures per each bucket.
|
|
* b. Extendible bucket (ext): The bucket is extended with space for 4 more
|
|
* keys. This is done by allocating additional memory at table init time,
|
|
* which is used to create a pool of free keys (the size of this pool is
|
|
* configurable and always a multiple of 4). On key add operation, the
|
|
* allocation of a group of 4 keys only happens successfully within the
|
|
* limit of free keys, otherwise the key add operation fails. On key
|
|
* delete operation, a group of 4 keys is freed back to the pool of free
|
|
* keys when the key to be deleted is the only key that was used within
|
|
* its group of 4 keys at that time. On key lookup operation, if the
|
|
* current bucket is in extended state and a match is not found in the
|
|
* first group of 4 keys, the search continues beyond the first group of
|
|
* 4 keys, potentially until all keys in this bucket are examined. The
|
|
* extendible bucket logic requires maintaining specific data structures
|
|
* per table and per each bucket.
|
|
* 2. Key signature computation:
|
|
* a. Pre-computed key signature: The key lookup operation is split between
|
|
* two CPU cores. The first CPU core (typically the CPU core performing
|
|
* packet RX) extracts the key from the input packet, computes the key
|
|
* signature and saves both the key and the key signature in the packet
|
|
* buffer as packet meta-data. The second CPU core reads both the key and
|
|
* the key signature from the packet meta-data and performs the bucket
|
|
* search step of the key lookup operation.
|
|
* b. Key signature computed on lookup (do-sig): The same CPU core reads
|
|
* the key from the packet meta-data, uses it to compute the key
|
|
* signature and also performs the bucket search step of the key lookup
|
|
* operation.
|
|
* 3. Key size:
|
|
* a. Configurable key size
|
|
* b. Single key size (8-byte, 16-byte or 32-byte key size)
|
|
*
|
|
***/
|
|
#include <stdint.h>
|
|
|
|
#include "rte_table.h"
|
|
|
|
/** Hash function */
|
|
typedef uint64_t (*rte_table_hash_op_hash)(
|
|
void *key,
|
|
uint32_t key_size,
|
|
uint64_t seed);
|
|
|
|
/**
|
|
* Hash tables with configurable key size
|
|
*
|
|
*/
|
|
/** Extendible bucket hash table parameters */
|
|
struct rte_table_hash_ext_params {
|
|
/** Key size (number of bytes) */
|
|
uint32_t key_size;
|
|
|
|
/** Maximum number of keys */
|
|
uint32_t n_keys;
|
|
|
|
/** Number of hash table buckets. Each bucket stores up to 4 keys. */
|
|
uint32_t n_buckets;
|
|
|
|
/** Number of hash table bucket extensions. Each bucket extension has
|
|
space for 4 keys and each bucket can have 0, 1 or more extensions. */
|
|
uint32_t n_buckets_ext;
|
|
|
|
/** Hash function */
|
|
rte_table_hash_op_hash f_hash;
|
|
|
|
/** Seed value for the hash function */
|
|
uint64_t seed;
|
|
|
|
/** Byte offset within packet meta-data where the 4-byte key signature
|
|
is located. Valid for pre-computed key signature tables, ignored for
|
|
do-sig tables. */
|
|
uint32_t signature_offset;
|
|
|
|
/** Byte offset within packet meta-data where the key is located */
|
|
uint32_t key_offset;
|
|
};
|
|
|
|
/** Extendible bucket hash table operations for pre-computed key signature */
|
|
extern struct rte_table_ops rte_table_hash_ext_ops;
|
|
|
|
/** Extendible bucket hash table operations for key signature computed on
|
|
lookup ("do-sig") */
|
|
extern struct rte_table_ops rte_table_hash_ext_dosig_ops;
|
|
|
|
/** LRU hash table parameters */
|
|
struct rte_table_hash_lru_params {
|
|
/** Key size (number of bytes) */
|
|
uint32_t key_size;
|
|
|
|
/** Maximum number of keys */
|
|
uint32_t n_keys;
|
|
|
|
/** Number of hash table buckets. Each bucket stores up to 4 keys. */
|
|
uint32_t n_buckets;
|
|
|
|
/** Hash function */
|
|
rte_table_hash_op_hash f_hash;
|
|
|
|
/** Seed value for the hash function */
|
|
uint64_t seed;
|
|
|
|
/** Byte offset within packet meta-data where the 4-byte key signature
|
|
is located. Valid for pre-computed key signature tables, ignored for
|
|
do-sig tables. */
|
|
uint32_t signature_offset;
|
|
|
|
/** Byte offset within packet meta-data where the key is located */
|
|
uint32_t key_offset;
|
|
};
|
|
|
|
/** LRU hash table operations for pre-computed key signature */
|
|
extern struct rte_table_ops rte_table_hash_lru_ops;
|
|
|
|
/** LRU hash table operations for key signature computed on lookup ("do-sig") */
|
|
extern struct rte_table_ops rte_table_hash_lru_dosig_ops;
|
|
|
|
/**
|
|
* 8-byte key hash tables
|
|
*
|
|
*/
|
|
/** LRU hash table parameters */
|
|
struct rte_table_hash_key8_lru_params {
|
|
/** Maximum number of entries (and keys) in the table */
|
|
uint32_t n_entries;
|
|
|
|
/** Hash function */
|
|
rte_table_hash_op_hash f_hash;
|
|
|
|
/** Seed for the hash function */
|
|
uint64_t seed;
|
|
|
|
/** Byte offset within packet meta-data where the 4-byte key signature
|
|
is located. Valid for pre-computed key signature tables, ignored for
|
|
do-sig tables. */
|
|
uint32_t signature_offset;
|
|
|
|
/** Byte offset within packet meta-data where the key is located */
|
|
uint32_t key_offset;
|
|
|
|
/** Bit-mask to be AND-ed to the key on lookup */
|
|
uint8_t *key_mask;
|
|
};
|
|
|
|
/** LRU hash table operations for pre-computed key signature */
|
|
extern struct rte_table_ops rte_table_hash_key8_lru_ops;
|
|
|
|
/** LRU hash table operations for key signature computed on lookup ("do-sig") */
|
|
extern struct rte_table_ops rte_table_hash_key8_lru_dosig_ops;
|
|
|
|
/** Extendible bucket hash table parameters */
|
|
struct rte_table_hash_key8_ext_params {
|
|
/** Maximum number of entries (and keys) in the table */
|
|
uint32_t n_entries;
|
|
|
|
/** Number of entries (and keys) for hash table bucket extensions. Each
|
|
bucket is extended in increments of 4 keys. */
|
|
uint32_t n_entries_ext;
|
|
|
|
/** Hash function */
|
|
rte_table_hash_op_hash f_hash;
|
|
|
|
/** Seed for the hash function */
|
|
uint64_t seed;
|
|
|
|
/** Byte offset within packet meta-data where the 4-byte key signature
|
|
is located. Valid for pre-computed key signature tables, ignored for
|
|
do-sig tables. */
|
|
uint32_t signature_offset;
|
|
|
|
/** Byte offset within packet meta-data where the key is located */
|
|
uint32_t key_offset;
|
|
|
|
/** Bit-mask to be AND-ed to the key on lookup */
|
|
uint8_t *key_mask;
|
|
};
|
|
|
|
/** Extendible bucket hash table operations for pre-computed key signature */
|
|
extern struct rte_table_ops rte_table_hash_key8_ext_ops;
|
|
|
|
/** Extendible bucket hash table operations for key signature computed on
|
|
lookup ("do-sig") */
|
|
extern struct rte_table_ops rte_table_hash_key8_ext_dosig_ops;
|
|
|
|
/**
|
|
* 16-byte key hash tables
|
|
*
|
|
*/
|
|
/** LRU hash table parameters */
|
|
struct rte_table_hash_key16_lru_params {
|
|
/** Maximum number of entries (and keys) in the table */
|
|
uint32_t n_entries;
|
|
|
|
/** Hash function */
|
|
rte_table_hash_op_hash f_hash;
|
|
|
|
/** Seed for the hash function */
|
|
uint64_t seed;
|
|
|
|
/** Byte offset within packet meta-data where the 4-byte key signature
|
|
is located. Valid for pre-computed key signature tables, ignored for
|
|
do-sig tables. */
|
|
uint32_t signature_offset;
|
|
|
|
/** Byte offset within packet meta-data where the key is located */
|
|
uint32_t key_offset;
|
|
|
|
/** Bit-mask to be AND-ed to the key on lookup */
|
|
uint8_t *key_mask;
|
|
};
|
|
|
|
/** LRU hash table operations for pre-computed key signature */
|
|
extern struct rte_table_ops rte_table_hash_key16_lru_ops;
|
|
|
|
/** LRU hash table operations for key signature computed on lookup
|
|
("do-sig") */
|
|
extern struct rte_table_ops rte_table_hash_key16_lru_dosig_ops;
|
|
|
|
/** Extendible bucket hash table parameters */
|
|
struct rte_table_hash_key16_ext_params {
|
|
/** Maximum number of entries (and keys) in the table */
|
|
uint32_t n_entries;
|
|
|
|
/** Number of entries (and keys) for hash table bucket extensions. Each
|
|
bucket is extended in increments of 4 keys. */
|
|
uint32_t n_entries_ext;
|
|
|
|
/** Hash function */
|
|
rte_table_hash_op_hash f_hash;
|
|
|
|
/** Seed for the hash function */
|
|
uint64_t seed;
|
|
|
|
/** Byte offset within packet meta-data where the 4-byte key signature
|
|
is located. Valid for pre-computed key signature tables, ignored for
|
|
do-sig tables. */
|
|
uint32_t signature_offset;
|
|
|
|
/** Byte offset within packet meta-data where the key is located */
|
|
uint32_t key_offset;
|
|
|
|
/** Bit-mask to be AND-ed to the key on lookup */
|
|
uint8_t *key_mask;
|
|
};
|
|
|
|
/** Extendible bucket operations for pre-computed key signature */
|
|
extern struct rte_table_ops rte_table_hash_key16_ext_ops;
|
|
|
|
/** Extendible bucket hash table operations for key signature computed on
|
|
lookup ("do-sig") */
|
|
extern struct rte_table_ops rte_table_hash_key16_ext_dosig_ops;
|
|
|
|
/**
|
|
* 32-byte key hash tables
|
|
*
|
|
*/
|
|
/** LRU hash table parameters */
|
|
struct rte_table_hash_key32_lru_params {
|
|
/** Maximum number of entries (and keys) in the table */
|
|
uint32_t n_entries;
|
|
|
|
/** Hash function */
|
|
rte_table_hash_op_hash f_hash;
|
|
|
|
/** Seed for the hash function */
|
|
uint64_t seed;
|
|
|
|
/** Byte offset within packet meta-data where the 4-byte key signature
|
|
is located. Valid for pre-computed key signature tables, ignored for
|
|
do-sig tables. */
|
|
uint32_t signature_offset;
|
|
|
|
/** Byte offset within packet meta-data where the key is located */
|
|
uint32_t key_offset;
|
|
};
|
|
|
|
/** LRU hash table operations for pre-computed key signature */
|
|
extern struct rte_table_ops rte_table_hash_key32_lru_ops;
|
|
|
|
/** Extendible bucket hash table parameters */
|
|
struct rte_table_hash_key32_ext_params {
|
|
/** Maximum number of entries (and keys) in the table */
|
|
uint32_t n_entries;
|
|
|
|
/** Number of entries (and keys) for hash table bucket extensions. Each
|
|
bucket is extended in increments of 4 keys. */
|
|
uint32_t n_entries_ext;
|
|
|
|
/** Hash function */
|
|
rte_table_hash_op_hash f_hash;
|
|
|
|
/** Seed for the hash function */
|
|
uint64_t seed;
|
|
|
|
/** Byte offset within packet meta-data where the 4-byte key signature
|
|
is located. Valid for pre-computed key signature tables, ignored for
|
|
do-sig tables. */
|
|
uint32_t signature_offset;
|
|
|
|
/** Byte offset within packet meta-data where the key is located */
|
|
uint32_t key_offset;
|
|
};
|
|
|
|
/** Extendible bucket hash table operations */
|
|
extern struct rte_table_ops rte_table_hash_key32_ext_ops;
|
|
|
|
/** Cuckoo hash table parameters */
|
|
struct rte_table_hash_cuckoo_params {
|
|
/** Key size (number of bytes */
|
|
uint32_t key_size;
|
|
|
|
/** Maximum number of hash table entries */
|
|
uint32_t n_keys;
|
|
|
|
/** Hash function used to calculate hash */
|
|
rte_table_hash_op_hash f_hash;
|
|
|
|
/** Seed value or Init value used by f_hash */
|
|
uint32_t seed;
|
|
|
|
/** Byte offset within packet meta-data where the 4-byte key signature
|
|
is located. Valid for pre-computed key signature tables, ignored for
|
|
do-sig tables. */
|
|
uint32_t signature_offset;
|
|
|
|
/** Byte offset within packet meta-data where the key is located */
|
|
uint32_t key_offset;
|
|
|
|
/** Hash table name */
|
|
const char *name;
|
|
};
|
|
|
|
/** Cuckoo hash table operations */
|
|
extern struct rte_table_ops rte_table_hash_cuckoo_dosig_ops;
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif
|