NetworkInterface.hh revision 11762:29d401db3746 
1/*
2 * Copyright (c) 2008 Princeton University
3 * Copyright (c) 2016 Georgia Institute of Technology
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are
8 * met: redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer;
10 * redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution;
13 * neither the name of the copyright holders nor the names of its
14 * contributors may be used to endorse or promote products derived from
15 * this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
20 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
21 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
23 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 *
29 * Authors: Niket Agarwal
30 *          Tushar Krishna
31 */
32
33
34#ifndef __MEM_RUBY_NETWORK_GARNET_NETWORK_INTERFACE_HH__
35#define __MEM_RUBY_NETWORK_GARNET_NETWORK_INTERFACE_HH__
36
37#include <iostream>
38#include <vector>
39
40#include "mem/ruby/common/Consumer.hh"
41#include "mem/ruby/network/garnet2.0/CommonTypes.hh"
42#include "mem/ruby/network/garnet2.0/CreditLink.hh"
43#include "mem/ruby/network/garnet2.0/GarnetNetwork.hh"
44#include "mem/ruby/network/garnet2.0/NetworkLink.hh"
45#include "mem/ruby/network/garnet2.0/OutVcState.hh"
46#include "mem/ruby/slicc_interface/Message.hh"
47#include "params/GarnetNetworkInterface.hh"
48
49class MessageBuffer;
50class flitBuffer;
51
52class NetworkInterface : public ClockedObject, public Consumer
53{
54  public:
55    typedef GarnetNetworkInterfaceParams Params;
56    NetworkInterface(const Params *p);
57    ~NetworkInterface();
58
59    void init();
60
61    void addInPort(NetworkLink *in_link, CreditLink *credit_link);
62    void addOutPort(NetworkLink *out_link, CreditLink *credit_link,
63        SwitchID router_id);
64
65    void wakeup();
66    void addNode(std::vector<MessageBuffer *> &inNode,
67                 std::vector<MessageBuffer *> &outNode);
68
69    void print(std::ostream& out) const;
70    int get_vnet(int vc);
71    int get_router_id() { return m_router_id; }
72    void init_net_ptr(GarnetNetwork *net_ptr) { m_net_ptr = net_ptr; }
73
74    uint32_t functionalWrite(Packet *);
75
76  private:
77    GarnetNetwork *m_net_ptr;
78    const NodeID m_id;
79    const int m_virtual_networks, m_vc_per_vnet, m_num_vcs;
80    int m_router_id; // id of my router
81    std::vector<OutVcState *> m_out_vc_state;
82    std::vector<int> m_vc_allocator;
83    int m_vc_round_robin; // For round robin scheduling
84    flitBuffer *outFlitQueue; // For modeling link contention
85    flitBuffer *outCreditQueue;
86    int m_deadlock_threshold;
87
88    NetworkLink *inNetLink;
89    NetworkLink *outNetLink;
90    CreditLink *inCreditLink;
91    CreditLink *outCreditLink;
92
93    // Input Flit Buffers
94    // The flit buffers which will serve the Consumer
95    std::vector<flitBuffer *>  m_ni_out_vcs;
96    std::vector<Cycles> m_ni_out_vcs_enqueue_time;
97
98    // The Message buffers that takes messages from the protocol
99    std::vector<MessageBuffer *> inNode_ptr;
100    // The Message buffers that provides messages to the protocol
101    std::vector<MessageBuffer *> outNode_ptr;
102    // When a vc stays busy for a long time, it indicates a deadlock
103    std::vector<int> vc_busy_counter;
104
105    bool flitisizeMessage(MsgPtr msg_ptr, int vnet);
106    int calculateVC(int vnet);
107    void scheduleOutputLink();
108    void checkReschedule();
109};
110
111#endif // __MEM_RUBY_NETWORK_GARNET_NETWORK_INTERFACE_HH__
112