mirror of
https://github.com/openvswitch/ovs
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76 lines
2.7 KiB
C
76 lines
2.7 KiB
C
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/*
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* Copyright (c) 2020 Intel Corporation.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef DPIF_NETDEV_LOOKUP_H
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#define DPIF_NETDEV_LOOKUP_H 1
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#include <config.h>
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#include "dpif-netdev.h"
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#include "dpif-netdev-private.h"
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/* Function to perform a probe for the subtable bit fingerprint.
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* Returns NULL if not valid, or a valid function pointer to call for this
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* subtable on success.
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*/
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typedef
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dpcls_subtable_lookup_func (*dpcls_subtable_probe_func)(uint32_t u0_bit_count,
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uint32_t u1_bit_count);
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/* Prototypes for subtable implementations */
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dpcls_subtable_lookup_func
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dpcls_subtable_autovalidator_probe(uint32_t u0_bit_count,
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uint32_t u1_bit_count);
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/* Probe function to select a specialized version of the generic lookup
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* implementation. This provides performance benefit due to compile-time
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* optimizations such as loop-unrolling. These are enabled by the compile-time
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* constants in the specific function implementations.
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*/
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dpcls_subtable_lookup_func
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dpcls_subtable_generic_probe(uint32_t u0_bit_count, uint32_t u1_bit_count);
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/* Subtable registration and iteration helpers */
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struct dpcls_subtable_lookup_info_t {
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/* higher priority gets used over lower values. This allows deployments
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* to select the best implementation for the use-case.
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*/
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uint8_t prio;
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/* Probe function: tests if the (u0,u1) combo is supported. If not
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* supported, this function returns NULL. If supported, a function pointer
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* is returned which when called will perform the lookup on the subtable.
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*/
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dpcls_subtable_probe_func probe;
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/* Human readable name, used in setting subtable priority commands */
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const char *name;
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};
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int32_t dpcls_subtable_set_prio(const char *name, uint8_t priority);
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dpcls_subtable_lookup_func
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dpcls_subtable_get_best_impl(uint32_t u0_bit_count, uint32_t u1_bit_count);
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/* Retrieve the array of lookup implementations for iteration.
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* On error, returns a negative number.
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* On success, returns the size of the arrays pointed to by the out parameter.
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*/
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int32_t
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dpcls_subtable_lookup_info_get(struct dpcls_subtable_lookup_info_t **out_ptr);
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#endif /* dpif-netdev-lookup.h */
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