/** * Copyright 2013-2021 Software Radio Systems Limited * * This file is part of srsRAN. * * srsRAN is free software: you can redistribute it and/or modify * it under the terms of the GNU Affero General Public License as * published by the Free Software Foundation, either version 3 of * the License, or (at your option) any later version. * * srsRAN is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU Affero General Public License for more details. * * A copy of the GNU Affero General Public License can be found in * the LICENSE file in the top-level directory of this distribution * and at http://www.gnu.org/licenses/. * */ #ifndef SRSENB_MAC_H #define SRSENB_MAC_H #include "sched.h" #include "srsenb/hdr/common/rnti_pool.h" #include "srsenb/hdr/stack/mac/schedulers/sched_time_rr.h" #include "srsran/adt/circular_map.h" #include "srsran/adt/pool/batch_mem_pool.h" #include "srsran/common/mac_pcap.h" #include "srsran/common/mac_pcap_net.h" #include "srsran/common/task_scheduler.h" #include "srsran/common/threads.h" #include "srsran/common/tti_sync_cv.h" #include "srsran/interfaces/enb_mac_interfaces.h" #include "srsran/interfaces/enb_metrics_interface.h" #include "srsran/interfaces/enb_rrc_interface_types.h" #include "srsran/interfaces/sched_interface.h" #include "srsran/srslog/srslog.h" #include "ta.h" #include "ue.h" #include namespace srsenb { class mac final : public mac_interface_phy_lte, public mac_interface_rlc, public mac_interface_rrc { public: mac(srsran::ext_task_sched_handle task_sched_, srslog::basic_logger& logger); ~mac(); bool init(const mac_args_t& args_, const cell_list_t& cells_, phy_interface_stack_lte* phy, rlc_interface_mac* rlc, rrc_interface_mac* rrc); void stop(); void start_pcap(srsran::mac_pcap* pcap_); void start_pcap_net(srsran::mac_pcap_net* pcap_net_); /******** Interface from PHY (PHY -> MAC) ****************/ int sr_detected(uint32_t tti, uint16_t rnti) final; void rach_detected(uint32_t tti, uint32_t enb_cc_idx, uint32_t preamble_idx, uint32_t time_adv) final; int ri_info(uint32_t tti, uint16_t rnti, uint32_t enb_cc_idx, uint32_t ri_value) override; int pmi_info(uint32_t tti, uint16_t rnti, uint32_t enb_cc_idx, uint32_t pmi_value) override; int cqi_info(uint32_t tti, uint16_t rnti, uint32_t enb_cc_idx, uint32_t cqi_value) override; int snr_info(uint32_t tti, uint16_t rnti, uint32_t enb_cc_idx, float snr, ul_channel_t ch) override; int ta_info(uint32_t tti, uint16_t rnti, float ta_us) override; int ack_info(uint32_t tti, uint16_t rnti, uint32_t enb_cc_idx, uint32_t tb_idx, bool ack) override; int crc_info(uint32_t tti, uint16_t rnti, uint32_t enb_cc_idx, uint32_t nof_bytes, bool crc_res) override; int push_pdu(uint32_t tti, uint16_t rnti, uint32_t enb_cc_idx, uint32_t nof_bytes, bool crc_res, uint32_t ul_nof_prbs) override; int get_dl_sched(uint32_t tti_tx_dl, dl_sched_list_t& dl_sched_res) override; int get_ul_sched(uint32_t tti_tx_ul, ul_sched_list_t& ul_sched_res) override; int get_mch_sched(uint32_t tti, bool is_mcch, dl_sched_list_t& dl_sched_res) override; void set_sched_dl_tti_mask(uint8_t* tti_mask, uint32_t nof_sfs) override { scheduler.set_dl_tti_mask(tti_mask, nof_sfs); } void build_mch_sched(uint32_t tbs); /******** Interface from RRC (RRC -> MAC) ****************/ /* Provides cell configuration including SIB periodicity, etc. */ int cell_cfg(const std::vector& cell_cfg) override; /* Manages UE scheduling context */ int ue_cfg(uint16_t rnti, const sched_interface::ue_cfg_t* cfg) override; int ue_rem(uint16_t rnti) override; int ue_set_crnti(uint16_t temp_crnti, uint16_t crnti, const sched_interface::ue_cfg_t& cfg) override; // Indicates that the PHY config dedicated has been enabled or not void phy_config_enabled(uint16_t rnti, bool enabled) override; /* Manages UE bearers and associated configuration */ int bearer_ue_cfg(uint16_t rnti, uint32_t lc_id, sched_interface::ue_bearer_cfg_t* cfg) override; int bearer_ue_rem(uint16_t rnti, uint32_t lc_id) override; int rlc_buffer_state(uint16_t rnti, uint32_t lc_id, uint32_t tx_queue, uint32_t retx_queue) override; /* Handover-related */ uint16_t reserve_new_crnti(const sched_interface::ue_cfg_t& ue_cfg) override; void get_metrics(mac_metrics_t& metrics); void toggle_padding(); void add_padding(); void write_mcch(const srsran::sib2_mbms_t* sib2_, const srsran::sib13_t* sib13_, const srsran::mcch_msg_t* mcch_, const uint8_t* mcch_payload, const uint8_t mcch_payload_length) override; private: bool check_ue_active(uint16_t rnti); uint16_t allocate_ue(uint32_t enb_cc_idx); bool is_valid_rnti_unprotected(uint16_t rnti); srslog::basic_logger& logger; // We use a rwlock in MAC to allow multiple workers to access MAC simultaneously. No conflicts will happen since // access for different TTIs pthread_rwlock_t rwlock = {}; // Interaction with PHY phy_interface_stack_lte* phy_h = nullptr; rlc_interface_mac* rlc_h = nullptr; rrc_interface_mac* rrc_h = nullptr; srsran::ext_task_sched_handle task_sched; cell_list_t cells = {}; mac_args_t args = {}; // derived from args srsran::task_multiqueue::queue_handle stack_task_queue; bool started = false; /* Scheduler unit */ sched scheduler; std::vector cell_config; sched_interface::dl_pdu_mch_t mch = {}; /* Map of active UEs */ static const uint16_t FIRST_RNTI = 0x46; rnti_map_t > ue_db; std::atomic ue_counter; uint8_t* assemble_rar(sched_interface::dl_sched_rar_grant_t* grants, uint32_t enb_cc_idx, uint32_t nof_grants, uint32_t rar_idx, uint32_t pdu_len, uint32_t tti); const static int rar_payload_len = 128; std::array rar_pdu_msg; srsran::byte_buffer_t rar_payload[SRSRAN_MAX_CARRIERS][sched_interface::MAX_RAR_LIST]; const static int NOF_BCCH_DLSCH_MSG = sched_interface::MAX_SIBS; const static int pcch_payload_buffer_len = 1024; typedef struct { uint8_t pcch_payload_buffer[pcch_payload_buffer_len] = {}; srsran_softbuffer_tx_t bcch_softbuffer_tx[NOF_BCCH_DLSCH_MSG] = {}; srsran_softbuffer_tx_t pcch_softbuffer_tx = {}; srsran_softbuffer_tx_t rar_softbuffer_tx = {}; } common_buffers_t; std::vector common_buffers; const static int mcch_payload_len = 3000; // TODO FIND OUT MAX LENGTH int current_mcch_length = 0; uint8_t mcch_payload_buffer[mcch_payload_len] = {}; srsran::mcch_msg_t mcch; srsran::sib2_mbms_t sib2; srsran::sib13_t sib13; const static int mtch_payload_len = 10000; uint8_t mtch_payload_buffer[mtch_payload_len] = {}; // pointer to MAC PCAP object srsran::mac_pcap* pcap = nullptr; srsran::mac_pcap_net* pcap_net = nullptr; bool do_padding = false; // Number of rach preambles detected for a cc. std::vector detected_rachs; // Softbuffer pool std::unique_ptr > softbuffer_pool; }; } // namespace srsenb #endif // SRSENB_MAC_H