4b15247150
It was requested by Intel, more than one year ago, to replace the name
"Intel DPDK" by "DPDK".
Some references to the old name were still in some docs and code comments,
leading to confusion.
Fixes: ac8ada004c ("doc: remove Intel references from release notes")
Signed-off-by: Thomas Monjalon <thomas.monjalon@6wind.com>
Acked-by: Bruce Richardson <bruce.richardson@intel.com>
302 lines
11 KiB
C
302 lines
11 KiB
C
/*-
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* BSD LICENSE
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*
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* Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef __INCLUDE_RTE_TABLE_H__
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#define __INCLUDE_RTE_TABLE_H__
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* @file
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* RTE Table
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*
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* This tool is part of the DPDK Packet Framework tool suite and provides
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* a standard interface to implement different types of lookup tables for data
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* plane processing.
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*
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* Virtually any search algorithm that can uniquely associate data to a lookup
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* key can be fitted under this lookup table abstraction. For the flow table
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* use-case, the lookup key is an n-tuple of packet fields that uniquely
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* identifies a traffic flow, while data represents actions and action
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* meta-data associated with the same traffic flow.
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*
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***/
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#include <stdint.h>
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#include <rte_port.h>
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struct rte_mbuf;
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/** Lookup table statistics */
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struct rte_table_stats {
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uint64_t n_pkts_in;
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uint64_t n_pkts_lookup_miss;
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};
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/**
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* Lookup table create
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*
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* @param params
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* Parameters for lookup table creation. The underlying data structure is
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* different for each lookup table type.
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* @param socket_id
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* CPU socket ID (e.g. for memory allocation purpose)
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* @param entry_size
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* Data size of each lookup table entry (measured in bytes)
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* @return
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* Handle to lookup table instance
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*/
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typedef void* (*rte_table_op_create)(void *params, int socket_id,
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uint32_t entry_size);
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/**
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* Lookup table free
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*
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* @param table
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* Handle to lookup table instance
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* @return
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* 0 on success, error code otherwise
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*/
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typedef int (*rte_table_op_free)(void *table);
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/**
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* Lookup table entry add
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*
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* @param table
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* Handle to lookup table instance
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* @param key
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* Lookup key
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* @param entry
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* Data to be associated with the current key. This parameter has to point to
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* a valid memory buffer where the first entry_size bytes (table create
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* parameter) are populated with the data.
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* @param key_found
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* After successful invocation, *key_found is set to a value different than 0
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* if the current key is already present in the table and to 0 if not. This
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* pointer has to be set to a valid memory location before the table entry add
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* function is called.
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* @param entry_ptr
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* After successful invocation, *entry_ptr stores the handle to the table
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* entry containing the data associated with the current key. This handle can
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* be used to perform further read-write accesses to this entry. This handle
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* is valid until the key is deleted from the table or the same key is
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* re-added to the table, typically to associate it with different data. This
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* pointer has to be set to a valid memory location before the function is
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* called.
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* @return
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* 0 on success, error code otherwise
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*/
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typedef int (*rte_table_op_entry_add)(
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void *table,
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void *key,
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void *entry,
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int *key_found,
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void **entry_ptr);
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/**
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* Lookup table entry delete
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*
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* @param table
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* Handle to lookup table instance
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* @param key
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* Lookup key
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* @param key_found
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* After successful invocation, *key_found is set to a value different than 0
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* if the current key was present in the table before the delete operation
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* was performed and to 0 if not. This pointer has to be set to a valid
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* memory location before the table entry delete function is called.
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* @param entry
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* After successful invocation, if the key is found in the table (*key found
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* is different than 0 after function call is completed) and entry points to
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* a valid buffer (entry is set to a value different than NULL before the
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* function is called), then the first entry_size bytes (table create
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* parameter) in *entry store a copy of table entry that contained the data
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* associated with the current key before the key was deleted.
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* @return
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* 0 on success, error code otherwise
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*/
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typedef int (*rte_table_op_entry_delete)(
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void *table,
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void *key,
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int *key_found,
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void *entry);
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/**
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* Lookup table entry add bulk
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*
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* @param table
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* Handle to lookup table instance
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* @param key
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* Array containing lookup keys
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* @param entries
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* Array containing data to be associated with each key. Every item in the
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* array has to point to a valid memory buffer where the first entry_size
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* bytes (table create parameter) are populated with the data.
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* @param n_keys
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* Number of keys to add
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* @param key_found
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* After successful invocation, key_found for every item in the array is set
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* to a value different than 0 if the current key is already present in the
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* table and to 0 if not. This pointer has to be set to a valid memory
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* location before the table entry add function is called.
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* @param entries_ptr
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* After successful invocation, array *entries_ptr stores the handle to the
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* table entry containing the data associated with every key. This handle can
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* be used to perform further read-write accesses to this entry. This handle
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* is valid until the key is deleted from the table or the same key is
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* re-added to the table, typically to associate it with different data. This
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* pointer has to be set to a valid memory location before the function is
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* called.
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* @return
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* 0 on success, error code otherwise
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*/
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typedef int (*rte_table_op_entry_add_bulk)(
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void *table,
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void **keys,
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void **entries,
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uint32_t n_keys,
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int *key_found,
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void **entries_ptr);
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/**
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* Lookup table entry delete bulk
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*
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* @param table
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* Handle to lookup table instance
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* @param key
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* Array containing lookup keys
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* @param n_keys
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* Number of keys to delete
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* @param key_found
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* After successful invocation, key_found for every item in the array is set
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* to a value different than 0if the current key was present in the table
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* before the delete operation was performed and to 0 if not. This pointer
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* has to be set to a valid memory location before the table entry delete
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* function is called.
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* @param entries
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* If entries pointer is NULL, this pointer is ignored for every entry found.
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* Else, after successful invocation, if specific key is found in the table
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* (key_found is different than 0 for this item after function call is
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* completed) and item of entry array points to a valid buffer (entry is set
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* to a value different than NULL before the function is called), then the
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* first entry_size bytes (table create parameter) in *entry store a copy of
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* table entry that contained the data associated with the current key before
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* the key was deleted.
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* @return
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* 0 on success, error code otherwise
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*/
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typedef int (*rte_table_op_entry_delete_bulk)(
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void *table,
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void **keys,
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uint32_t n_keys,
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int *key_found,
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void **entries);
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/**
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* Lookup table lookup
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*
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* @param table
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* Handle to lookup table instance
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* @param pkts
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* Burst of input packets specified as array of up to 64 pointers to struct
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* rte_mbuf
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* @param pkts_mask
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* 64-bit bitmask specifying which packets in the input burst are valid. When
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* pkts_mask bit n is set, then element n of pkts array is pointing to a
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* valid packet. Otherwise, element n of pkts array does not point to a valid
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* packet, therefore it will not be accessed.
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* @param lookup_hit_mask
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* Once the table lookup operation is completed, this 64-bit bitmask
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* specifies which of the valid packets in the input burst resulted in lookup
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* hit. For each valid input packet (pkts_mask bit n is set), the following
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* are true on lookup hit: lookup_hit_mask bit n is set, element n of entries
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* array is valid and it points to the lookup table entry that was hit. For
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* each valid input packet (pkts_mask bit n is set), the following are true
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* on lookup miss: lookup_hit_mask bit n is not set and element n of entries
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* array is not valid.
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* @param entries
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* Once the table lookup operation is completed, this array provides the
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* lookup table entries that were hit, as described above. It is required
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* that this array is always pre-allocated by the caller of this function
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* with exactly 64 elements. The implementation is allowed to speculatively
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* modify the elements of this array, so elements marked as invalid in
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* lookup_hit_mask once the table lookup operation is completed might have
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* been modified by this function.
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* @return
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* 0 on success, error code otherwise
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*/
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typedef int (*rte_table_op_lookup)(
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void *table,
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struct rte_mbuf **pkts,
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uint64_t pkts_mask,
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uint64_t *lookup_hit_mask,
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void **entries);
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/**
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* Lookup table stats read
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*
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* @param table
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* Handle to lookup table instance
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* @param stats
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* Handle to table stats struct to copy data
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* @param clear
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* Flag indicating that stats should be cleared after read
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*
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* @return
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* Error code or 0 on success.
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*/
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typedef int (*rte_table_op_stats_read)(
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void *table,
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struct rte_table_stats *stats,
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int clear);
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/** Lookup table interface defining the lookup table operation */
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struct rte_table_ops {
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rte_table_op_create f_create; /**< Create */
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rte_table_op_free f_free; /**< Free */
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rte_table_op_entry_add f_add; /**< Entry add */
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rte_table_op_entry_delete f_delete; /**< Entry delete */
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rte_table_op_entry_add_bulk f_add_bulk; /**< Add entry bulk */
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rte_table_op_entry_delete_bulk f_delete_bulk; /**< Delete entry bulk */
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rte_table_op_lookup f_lookup; /**< Lookup */
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rte_table_op_stats_read f_stats; /**< Stats */
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};
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#ifdef __cplusplus
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}
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#endif
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#endif
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