configuration.p4

/*
  Copyright 2021 Intel-KAUST-Microsoft

  Licensed under the Apache License, Version 2.0 (the "License");
  you may not use this file except in compliance with the License.
  You may obtain a copy of the License at

     http://www.apache.org/licenses/LICENSE-2.0

  Unless required by applicable law or agreed to in writing, software
  distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  See the License for the specific language governing permissions and
  limitations under the License.
*/

#ifndef _CONFIGURATION_
#define _CONFIGURATION_

// Register size
// 16384 is the largest power-of-two stateful 64b register size per stage in Tofino 1
// This is enough for a single 2MB message in flight when using 2 slots
const int register_size = 16384;

// Each slot has two registers because of the shadow copy
const int num_slots = register_size / 2;

// Max number of SwitchML workers we support
const int max_num_workers = 32;
const int max_num_workers_log2 = 5; // log base 2 of max_num_workers

// Size of the forwarding table
const int forwarding_table_size = 1024;

// Number of destination queue pairs per-worker
const int max_num_queue_pairs_per_worker = 512;
const int max_num_queue_pairs_per_worker_log2 = 9;

// Total number of destination queue pairs
const int max_num_queue_pairs = max_num_queue_pairs_per_worker * max_num_workers;
const int max_num_queue_pairs_log2 = max_num_queue_pairs_per_worker_log2 + max_num_workers_log2;

// Exclusion ID value to use when we don't want to exclude any nodes
// during multicast
const bit<16> null_level1_exclusion_id = 0xffff;

#endif /* _CONFIGURATION_ */