| Carmelo Cascone | ca94bcf | 2017-10-27 14:16:59 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2017-present Open Networking Foundation |
| 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 | #include <core.p4> |
| 18 | #include <v1model.p4> |
| 19 | |
| 20 | #include "include/headers.p4" |
| 21 | #include "include/defines.p4" |
| 22 | #include "include/parsers.p4" |
| 23 | #include "include/actions.p4" |
| 24 | #include "include/port_counters.p4" |
| 25 | #include "include/checksums.p4" |
| 26 | #include "include/packet_io.p4" |
| 27 | #include "include/table0.p4" |
| 28 | |
| 29 | // FIXME: this program is obsolete and should be removed. |
| 30 | // The PI ECMP demo app should be refactored to use the WCMP capability of default.p4 |
| 31 | |
| 32 | // Expected number of ports of an ECMP group. |
| 33 | // This value is fixed, .i.e. we do not support ECMP over port groups of different |
| 34 | // size. Due to hardware limitations, this value must be constant and a power of 2. |
| 35 | |
| 36 | #define ECMP_GROUP_SIZE 128w2 |
| 37 | |
| 38 | //------------------------------------------------------------------------------ |
| 39 | // INGRESS PIPELINE |
| 40 | //------------------------------------------------------------------------------ |
| 41 | |
| 42 | control ingress(inout headers_t hdr, |
| 43 | inout local_metadata_t local_metadata, |
| 44 | inout standard_metadata_t standard_metadata) { |
| 45 | |
| 46 | direct_counter(CounterType.packets_and_bytes) ecmp_table_counter; |
| 47 | |
| 48 | table ecmp_table { |
| 49 | key = { |
| 50 | local_metadata.next_hop_id : exact; |
| 51 | local_metadata.selector : exact; |
| 52 | } |
| 53 | actions = { |
| 54 | set_egress_port(standard_metadata); |
| 55 | } |
| 56 | counters = ecmp_table_counter; |
| 57 | } |
| 58 | |
| 59 | action set_ecmp_selector() { |
| 60 | hash(local_metadata.selector, HashAlgorithm.crc16, (bit<64>) 0, |
| 61 | { |
| 62 | hdr.ipv4.src_addr, |
| 63 | hdr.ipv4.dst_addr, |
| 64 | hdr.ipv4.protocol, |
| 65 | local_metadata.l4_src_port, |
| 66 | local_metadata.l4_dst_port |
| 67 | }, |
| 68 | ECMP_GROUP_SIZE); |
| 69 | } |
| 70 | |
| 71 | apply { |
| 72 | port_counters_ingress.apply(hdr, standard_metadata); |
| 73 | packetio_ingress.apply(hdr, standard_metadata); |
| 74 | table0_control.apply(hdr, local_metadata, standard_metadata); |
| 75 | if (local_metadata.next_hop_id > 0) { |
| 76 | set_ecmp_selector(); |
| 77 | ecmp_table.apply(); |
| 78 | } |
| 79 | } |
| 80 | } |
| 81 | |
| 82 | //------------------------------------------------------------------------------ |
| 83 | // EGRESS PIPELINE |
| 84 | //------------------------------------------------------------------------------ |
| 85 | |
| 86 | control egress(inout headers_t hdr, |
| 87 | inout local_metadata_t local_metadata, |
| 88 | inout standard_metadata_t standard_metadata) { |
| 89 | |
| 90 | apply { |
| 91 | port_counters_egress.apply(hdr, standard_metadata); |
| 92 | packetio_egress.apply(hdr, standard_metadata); |
| 93 | } |
| 94 | } |
| 95 | |
| 96 | //------------------------------------------------------------------------------ |
| 97 | // SWITCH INSTANTIATION |
| 98 | //------------------------------------------------------------------------------ |
| 99 | |
| 100 | V1Switch(parser_impl(), |
| 101 | verify_checksum_control(), |
| 102 | ingress(), |
| 103 | egress(), |
| 104 | compute_checksum_control(), |
| 105 | deparser()) main; |