[998] | 1 | /* -*- c++ -*- |
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| 2 | * |
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| 3 | * SOCLIB_LGPL_HEADER_BEGIN |
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| 4 | * |
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| 5 | * This file is part of SoCLib, GNU LGPLv2.1. |
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| 6 | * |
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| 7 | * SoCLib is free software; you can redistribute it and/or modify it |
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| 8 | * under the terms of the GNU Lesser General Public License as published |
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| 9 | * by the Free Software Foundation; version 2.1 of the License. |
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| 10 | * |
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| 11 | * SoCLib is distributed in the hope that it will be useful, but |
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| 12 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 14 | * Lesser General Public License for more details. |
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| 15 | * |
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| 16 | * You should have received a copy of the GNU Lesser General Public |
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| 17 | * License along with SoCLib; if not, write to the Free Software |
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| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
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| 19 | * 02110-1301 USA |
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| 20 | * |
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| 21 | * SOCLIB_LGPL_HEADER_END |
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| 22 | * |
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| 23 | * Authors : alain.greiner@lip6.fr |
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| 24 | * Date : august 2013 |
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| 25 | * Copyright: UPMC - LIP6 |
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| 26 | * |
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| 27 | * Modified by: Cesar Fuguet Tortolero |
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| 28 | */ |
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| 29 | |
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| 30 | #ifndef DSPIN_PACKET_GENERATOR_H |
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| 31 | #define DSPIN_PACKET_GENERATOR_H |
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| 32 | |
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| 33 | #include <systemc> |
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| 34 | #include "caba_base_module.h" |
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| 35 | #include "dspin_interface.h" |
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| 36 | #include "generic_fifo.h" |
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| 37 | #include "alloc_elems.h" |
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| 38 | |
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| 39 | //////////////////////////////////////////////////////////////////////////// |
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| 40 | // This component is a synthetic sender/receiver of DSPIN paquets. |
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| 41 | // It has two DSPIN ports, and behaves as both a packet generator |
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| 42 | // (controled by the SEND_FSM), and a packet analyser (controled by |
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| 43 | // the RECEIVE_FSM). The flit width can be different for send packets |
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| 44 | // and received packets. These flit widths are template parameters. |
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| 45 | // - As a packet generator, it cand send unicast or broadcast packets. |
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| 46 | // A first GENERATOR FSM post dated requests in a FIFO. The CMD FSM |
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| 47 | // consume these dated requests as soon as the FIFO is not empty, |
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| 48 | // and try to send unicast or broadcast DSPIN packets. |
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| 49 | // For an unicast packet, the number of flits is fixed and defined |
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| 50 | // as a constructor parameter (plen), It cannot be less than 2 flits. |
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| 51 | // The number of flits is exactly two flits for a broadcast packet. |
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| 52 | // The flit width cannot be less than 33 bits (including EOP). |
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| 53 | // For both packet types, the first flit is the header, and the second |
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| 54 | // flit contains the sender absolute date. |
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| 55 | // The constructor parameter (load) define the requested (offered) load. |
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| 56 | // The accepted load is computed as : (NB_PACKETS * LENGTH / NB_CYCLES). |
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| 57 | // - As a packet analyser, it computes the total number of received packets |
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| 58 | // (for each type of packet), and the total cumulated latency. |
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| 59 | //////////////////////////////////////////////////////////////////////////// |
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| 60 | // - first flit format in case of a unicast packet : |
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| 61 | // |EOP| X | Y |---------------------------------------|BC | |
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| 62 | // | 0 | x_width | y_width | flit_width - (x_width + y_width + 2) | 1 | |
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| 63 | // |
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| 64 | // - first flit format in case of a broadcast packet : |
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| 65 | // |EOP| XMIN | XMAX | YMIN | YMAX |-------------------|BC | |
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| 66 | // | 0 | 5 | 5 | 5 | 5 | flit_width - 22 | 1 | |
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| 67 | // |
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| 68 | // - second flit format : |
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| 69 | // |EOP|-----------------| date | |
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| 70 | // | * | flit_width - 33 | 32 | |
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| 71 | //////////////////////////////////////////////////////////////////////////// |
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| 72 | // It has three constructors parameters : |
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| 73 | // - size_t length == number of flits |
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| 74 | // - size_t load == LOAD*1000 |
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| 75 | // - size_t bcp == NB_PACKETS / NB_BROACAST (optionnal) |
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| 76 | //////////////////////////////////////////////////////////////////////////// |
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| 77 | |
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| 78 | namespace soclib { namespace caba { |
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| 79 | |
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| 80 | // FSM states |
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| 81 | enum |
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| 82 | { |
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| 83 | SEND_IDLE, |
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| 84 | SEND_UNICAST, |
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| 85 | SEND_BROADCAST, |
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| 86 | }; |
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| 87 | |
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| 88 | enum |
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| 89 | { |
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| 90 | RECEIVE_IDLE, |
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| 91 | RECEIVE_UNICAST, |
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| 92 | RECEIVE_BROADCAST, |
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| 93 | RECEIVE_WAIT_EOP, |
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| 94 | }; |
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| 95 | |
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| 96 | template<int cmd_width, int rsp_width> |
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| 97 | class DspinPacketGenerator |
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| 98 | : public soclib::caba::BaseModule |
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| 99 | { |
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| 100 | |
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| 101 | protected: |
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| 102 | |
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| 103 | SC_HAS_PROCESS(DspinPacketGenerator); |
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| 104 | |
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| 105 | public: |
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| 106 | |
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| 107 | // ports |
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| 108 | sc_core::sc_in<bool> p_clk; |
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| 109 | sc_core::sc_in<bool> p_resetn; |
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| 110 | soclib::caba::DspinInput<rsp_width> p_in; |
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| 111 | soclib::caba::DspinOutput<cmd_width> p_out; |
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| 112 | |
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| 113 | // constructor |
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| 114 | DspinPacketGenerator( sc_module_name name, |
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| 115 | const size_t srcid, // source identifier |
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| 116 | const size_t length, // unicast packet length |
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| 117 | const size_t load, // requested load * 1000 |
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| 118 | const size_t fifo_depth, // fifo depth |
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| 119 | const size_t bcp, // broadcast period |
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| 120 | const size_t x_width, |
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| 121 | const size_t y_width, |
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| 122 | const size_t x_size, |
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| 123 | const size_t y_size, |
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| 124 | const size_t max_packets = 0); |
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| 125 | private: |
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| 126 | |
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| 127 | // registers |
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| 128 | sc_core::sc_signal<uint32_t> r_cycles; // cycles counter (date) |
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| 129 | |
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| 130 | sc_core::sc_signal<uint32_t> r_posted_date; // packet posted date |
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| 131 | sc_core::sc_signal<uint32_t> r_posted_bc_packets; // # of posted broadcasts |
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| 132 | sc_core::sc_signal<uint32_t> r_posted_packets; // # of posted unicasts |
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| 133 | |
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| 134 | sc_core::sc_signal<int> r_send_fsm; // SEND state |
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| 135 | sc_core::sc_signal<size_t> r_send_length; // flit counter |
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| 136 | sc_core::sc_signal<size_t> r_send_dest; // packet destination (x,y) |
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| 137 | sc_core::sc_signal<uint32_t> r_send_packets; // number of unicast packets |
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| 138 | sc_core::sc_signal<uint32_t> r_send_bc_packets; // number of broadcast packets |
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| 139 | |
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| 140 | sc_core::sc_signal<int> r_receive_fsm; // RECEIVE FSM state |
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| 141 | sc_core::sc_signal<size_t> r_receive_packets; // number of unicast packets |
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| 142 | sc_core::sc_signal<size_t> r_receive_latency; // cululated unicast latency |
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| 143 | sc_core::sc_signal<size_t> r_receive_bc_packets; // number of broadcast packets |
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| 144 | sc_core::sc_signal<size_t> r_receive_bc_latency; // cumulated broadcast latency |
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| 145 | |
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| 146 | // Fifo from GENERATOR FSM to SEND FSM |
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| 147 | GenericFifo<uint32_t> r_transaction_fifo; |
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| 148 | |
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| 149 | // structural variables |
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| 150 | const size_t m_length; // unicast packet length |
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| 151 | const size_t m_load; // requested load |
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| 152 | const size_t m_bcp; // broadcast period |
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| 153 | const size_t m_srcid; // seed for random |
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| 154 | const size_t m_x_width; // X coordinate width |
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| 155 | const size_t m_y_width; // Y coordinate width |
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| 156 | const size_t m_x_size; // X coordinate max |
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| 157 | const size_t m_y_size; // Y coordinate max |
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| 158 | const size_t m_max_packets; // max number of sent packets |
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| 159 | |
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| 160 | // methods |
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| 161 | void transition(); |
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| 162 | void genMoore(); |
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| 163 | |
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| 164 | public: |
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| 165 | |
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| 166 | inline uint32_t get_sent_packets() |
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| 167 | { |
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| 168 | return r_send_packets.read() + r_send_bc_packets.read(); |
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| 169 | } |
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| 170 | |
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| 171 | void print_trace(); |
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| 172 | void print_stats(); |
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| 173 | |
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| 174 | }; // end class DspinPacketGenerator |
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| 175 | |
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| 176 | }} // end namespace |
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| 177 | |
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| 178 | #endif // end DSPIN_PACKET_GENERATOR_H |
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