[528] | 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 | * Copyright (c) Telecom ParisTech |
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| 24 | * Alexandre Becoulet <alexandre.becoulet@enst.fr>, 2012 |
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| 25 | * |
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| 26 | * Maintainers: becoulet |
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| 27 | * |
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| 28 | * Maintainers: nipo |
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| 29 | */ |
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| 30 | |
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| 31 | #ifndef SOCLIB_VCI_ETHERNET_H |
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| 32 | #define SOCLIB_VCI_ETHERNET_H |
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| 33 | |
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| 34 | #include <stdint.h> |
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| 35 | #include <systemc> |
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| 36 | |
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| 37 | #include <linux/if_tun.h> |
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| 38 | #include <sys/ioctl.h> |
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| 39 | #include <sys/socket.h> |
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| 40 | #include <net/if.h> |
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| 41 | #include <netinet/in.h> |
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| 42 | |
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| 43 | #include "vci_target_fsm.h" |
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| 44 | #include "vci_initiator_fsm.h" |
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| 45 | #include "caba_base_module.h" |
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| 46 | #include "mapping_table.h" |
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| 47 | |
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| 48 | #define VCI_ETHERNET_FIFO_SIZE 8 |
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| 49 | #define VCI_ETHERNET_MAX_PKT_SIZE 1500 |
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| 50 | |
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| 51 | namespace soclib { |
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| 52 | namespace caba { |
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| 53 | |
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| 54 | using namespace sc_core; |
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| 55 | |
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| 56 | template<typename vci_param> |
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| 57 | class VciEthernet |
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| 58 | : public caba::BaseModule |
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| 59 | { |
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| 60 | private: |
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| 61 | soclib::caba::VciTargetFsm<vci_param, true> m_vci_target_fsm; |
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| 62 | soclib::caba::VciInitiatorFsm<vci_param> m_vci_init_fsm; |
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| 63 | typedef typename soclib::caba::VciInitiatorReq<vci_param> req_t; |
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| 64 | |
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| 65 | bool on_write(int seg, typename vci_param::addr_t addr, typename vci_param::data_t data, int be); |
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| 66 | bool on_read(int seg, typename vci_param::addr_t addr, typename vci_param::data_t &data); |
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| 67 | void read_finish( req_t *req ); |
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| 68 | void write_finish( req_t *req ); |
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| 69 | void transition(); |
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| 70 | void genMoore(); |
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| 71 | void cleanup_fifos(); |
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| 72 | |
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| 73 | struct fifo_entry_t |
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| 74 | { |
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| 75 | uint32_t addr; |
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| 76 | uint32_t size; |
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| 77 | uint32_t status; |
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| 78 | uint8_t *data; |
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| 79 | int dma_offset; |
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| 80 | union { |
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| 81 | VciInitSimpleReadReq<vci_param> *rd_req; |
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| 82 | VciInitSimpleWriteReq<vci_param> *wr_req; |
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| 83 | }; |
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| 84 | }; |
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| 85 | |
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| 86 | int _rx_start; //< index of first available rx buffer |
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| 87 | int _rx_free; //< number of yet unused rx buffers |
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| 88 | int _rx_done; //< number of rx buffers ready to pop |
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| 89 | int _rx_count; //< total number of rx buffers |
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| 90 | |
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| 91 | int _tx_start; //< index of first tx buffer |
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| 92 | int _tx_waiting; //< number of yet unprocessed tx buffers |
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| 93 | int _tx_done; //< number of tx buffers ready to pop |
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| 94 | int _tx_count; //< total number of tx buffers |
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| 95 | |
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| 96 | int _link_check_counter; |
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| 97 | |
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| 98 | bool _dma_busy; |
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| 99 | bool _link_up; |
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| 100 | bool _link_changed; |
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| 101 | |
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| 102 | fifo_entry_t _tx_fifo[VCI_ETHERNET_FIFO_SIZE]; |
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| 103 | fifo_entry_t _rx_fifo[VCI_ETHERNET_FIFO_SIZE]; |
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| 104 | |
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| 105 | uint32_t _tx_size; //< next tx buffer size |
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| 106 | uint32_t _rx_size; //< next rx buffer size |
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| 107 | |
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| 108 | bool _rx_irq_en; |
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| 109 | bool _tx_irq_en; |
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| 110 | bool _link_irq_en; |
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| 111 | bool _soft_reset; |
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| 112 | |
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| 113 | int _fd; |
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| 114 | uint8_t _mac[6]; |
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| 115 | |
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| 116 | struct ifreq _tap_ifr; |
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| 117 | |
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| 118 | inline void ended(int status); |
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| 119 | |
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| 120 | protected: |
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| 121 | SC_HAS_PROCESS(VciEthernet); |
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| 122 | |
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| 123 | public: |
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| 124 | sc_in<bool> p_clk; |
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| 125 | sc_in<bool> p_resetn; |
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| 126 | soclib::caba::VciTarget<vci_param> p_vci_target; |
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| 127 | soclib::caba::VciInitiator<vci_param> p_vci_initiator; |
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| 128 | sc_out<bool> p_irq; |
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| 129 | |
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| 130 | VciEthernet(sc_module_name name, const soclib::common::MappingTable &mt, |
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| 131 | const soclib::common::IntTab &srcid, const soclib::common::IntTab &tgtid, |
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| 132 | const std::string &if_name = "soclib0"); |
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| 133 | |
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| 134 | ~VciEthernet(); |
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| 135 | }; |
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| 136 | |
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| 137 | }} |
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| 138 | |
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| 139 | #endif /* SOCLIB_VCI_ETHERNET_H */ |
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| 140 | |
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| 141 | // Local Variables: |
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| 142 | // tab-width: 4 |
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| 143 | // c-basic-offset: 4 |
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| 144 | // c-file-offsets:((innamespace . 0)(inline-open . 0)) |
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| 145 | // indent-tabs-mode: nil |
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| 146 | // End: |
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| 147 | |
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| 148 | // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=4:softtabstop=4 |
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| 149 | |
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