projects / mirror_ovs.git / blame
| Commit | Line | Data |
|---|---|---|
| e90e115a HH |
1 | /* |
| 2 | * Copyright (c) 2020 Intel Corporation. | |
| 3 | * | |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); | |
| 5 | * you may not use this file except in compliance with the License. | |
| 6 | * You may obtain a copy of the License at: | |
| 7 | * | |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 | |
| 9 | * | |
| 10 | * Unless required by applicable law or agreed to in writing, software | |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, | |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
| 13 | * See the License for the specific language governing permissions and | |
| 14 | * limitations under the License. | |
| 15 | */ | |
| 16 | ||
| 17 | #ifndef DPIF_NETDEV_LOOKUP_H | |
| 18 | #define DPIF_NETDEV_LOOKUP_H 1 | |
| 19 | ||
| 20 | #include <config.h> | |
| 21 | #include "dpif-netdev.h" | |
| 22 | #include "dpif-netdev-private.h" | |
| 23 | ||
| 24 | /* Function to perform a probe for the subtable bit fingerprint. | |
| 25 | * Returns NULL if not valid, or a valid function pointer to call for this | |
| 26 | * subtable on success. | |
| 27 | */ | |
| 28 | typedef | |
| 29 | dpcls_subtable_lookup_func (*dpcls_subtable_probe_func)(uint32_t u0_bit_count, | |
| 30 | uint32_t u1_bit_count); | |
| 31 | ||
| 32 | /* Prototypes for subtable implementations */ | |
| 33 | dpcls_subtable_lookup_func | |
| 34 | dpcls_subtable_autovalidator_probe(uint32_t u0_bit_count, | |
| 35 | uint32_t u1_bit_count); | |
| 36 | ||
| 37 | /* Probe function to select a specialized version of the generic lookup | |
| 38 | * implementation. This provides performance benefit due to compile-time | |
| 39 | * optimizations such as loop-unrolling. These are enabled by the compile-time | |
| 40 | * constants in the specific function implementations. | |
| 41 | */ | |
| 42 | dpcls_subtable_lookup_func | |
| 43 | dpcls_subtable_generic_probe(uint32_t u0_bit_count, uint32_t u1_bit_count); | |
| 44 | ||
| 352b6c71 HH |
45 | /* Probe function for AVX-512 gather implementation */ |
| 46 | dpcls_subtable_lookup_func | |
| 47 | dpcls_subtable_avx512_gather_probe(uint32_t u0_bit_cnt, uint32_t u1_bit_cnt); | |
| 48 | ||
| e90e115a HH |
49 | |
| 50 | /* Subtable registration and iteration helpers */ | |
| 51 | struct dpcls_subtable_lookup_info_t { | |
| 52 | /* higher priority gets used over lower values. This allows deployments | |
| 53 | * to select the best implementation for the use-case. | |
| 54 | */ | |
| 55 | uint8_t prio; | |
| 56 | ||
| 57 | /* Probe function: tests if the (u0,u1) combo is supported. If not | |
| 58 | * supported, this function returns NULL. If supported, a function pointer | |
| 59 | * is returned which when called will perform the lookup on the subtable. | |
| 60 | */ | |
| 61 | dpcls_subtable_probe_func probe; | |
| 62 | ||
| 63 | /* Human readable name, used in setting subtable priority commands */ | |
| 64 | const char *name; | |
| 65 | }; | |
| 66 | ||
| 67 | int32_t dpcls_subtable_set_prio(const char *name, uint8_t priority); | |
| 68 | ||
| 69 | dpcls_subtable_lookup_func | |
| 70 | dpcls_subtable_get_best_impl(uint32_t u0_bit_count, uint32_t u1_bit_count); | |
| 71 | ||
| 72 | /* Retrieve the array of lookup implementations for iteration. | |
| 73 | * On error, returns a negative number. | |
| 74 | * On success, returns the size of the arrays pointed to by the out parameter. | |
| 75 | */ | |
| 76 | int32_t | |
| 77 | dpcls_subtable_lookup_info_get(struct dpcls_subtable_lookup_info_t **out_ptr); | |
| 78 | ||
| 79 | #endif /* dpif-netdev-lookup.h */ |