615067c163
This change allows configuring each router with a certain number of VCs for each VNET. This is beneficial when dealing with heterogenous link widths in a system. Configuring VCs for each router allows one to ensure equal throughput within the network while avoiding head-of-line blocking. Changing a router's VCs number can be done in topology files using the vcs_per_vnet value argument of router. Change-Id: Icf4f510248128429a1a11f19f9802ee96f340611 Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/32599 Reviewed-by: Jason Lowe-Power <power.jg@gmail.com> Maintainer: Jason Lowe-Power <power.jg@gmail.com> Tested-by: kokoro <noreply+kokoro@google.com>
101 lines
3.3 KiB
C++
101 lines
3.3 KiB
C++
/*
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* Copyright (c) 2020 Advanced Micro Devices, Inc.
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* All rights reserved.
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*
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* For use for simulation and test purposes only
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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 are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the copyright holder nor the names of its
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* contributors may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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* Authors: Srikant Bharadwaj
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*/
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#ifndef __MEM_RUBY_NETWORK_GARNET2_0_NETWORK_BRIDGE_HH__
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#define __MEM_RUBY_NETWORK_GARNET2_0_NETWORK_BRIDGE_HH__
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#include <iostream>
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#include <queue>
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#include <vector>
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#include "mem/ruby/common/Consumer.hh"
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#include "mem/ruby/network/garnet2.0/CommonTypes.hh"
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#include "mem/ruby/network/garnet2.0/CreditLink.hh"
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#include "mem/ruby/network/garnet2.0/GarnetLink.hh"
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#include "mem/ruby/network/garnet2.0/NetworkLink.hh"
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#include "mem/ruby/network/garnet2.0/flitBuffer.hh"
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#include "params/NetworkBridge.hh"
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class GarnetNetwork;
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class NetworkBridge: public CreditLink
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{
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public:
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typedef NetworkBridgeParams Params;
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NetworkBridge(const Params *p);
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~NetworkBridge();
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void initBridge(NetworkBridge *coBrid, bool cdc_en, bool serdes_en);
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void wakeup();
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void neutralize(int vc, int eCredit);
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void scheduleFlit(flit *t_flit, Cycles latency);
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void flitisizeAndSend(flit *t_flit);
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void setVcsPerVnet(uint32_t consumerVcs);
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protected:
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// Pointer to co-existing bridge
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// CreditBridge for Network Bridge and vice versa
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NetworkBridge *coBridge;
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// Link connected toBridge
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// could be a source or destination
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// depending on mType
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NetworkLink *nLink;
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// CDC enable/disable
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bool enCdc;
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// SerDes enable/disable
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bool enSerDes;
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// Type of Bridge
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int mType;
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Cycles cdcLatency;
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Cycles serDesLatency;
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Tick lastScheduledAt;
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// Used by Credit Deserializer
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std::vector<int> lenBuffer;
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std::vector<int> sizeSent;
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std::vector<int> flitsSent;
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std::vector<std::queue<int>> extraCredit;
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};
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#endif // __MEM_RUBY_NETWORK_GARNET2_0_NETWORK_BRIDGE_HH__
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