/** * * \section COPYRIGHT * * Copyright 2013-2021 Software Radio Systems Limited * * By using this file, you agree to the terms and conditions set * forth in the LICENSE file which can be found at the top level of * the distribution. * */ #ifndef SRSRAN_GNB_INTERFACES_H #define SRSRAN_GNB_INTERFACES_H #include "srsran/srsran.h" #include "srsran/common/interfaces_common.h" #include "srsran/common/security.h" #include "srsran/interfaces/pdcp_interface_types.h" #include "srsran/interfaces/rlc_interface_types.h" #include "srsran/interfaces/rrc_interface_types.h" #include "srsran/interfaces/sched_interface.h" namespace srsenb { /***************************** * MAC INTERFACES ****************************/ class mac_interface_rrc_nr { public: // Provides cell configuration including SIB periodicity, etc. virtual int cell_cfg(srsenb::sched_interface::cell_cfg_t* cell_cfg) = 0; }; class mac_interface_rlc_nr { public: virtual int rlc_buffer_state(uint16_t rnti, uint32_t lc_id, uint32_t tx_queue, uint32_t retx_queue) = 0; }; /***************************** * RLC INTERFACES ****************************/ class rlc_interface_mac_nr { public: /* MAC calls RLC to get RLC segment of nof_bytes length. * Segmentation happens in this function. RLC PDU is stored in payload. */ virtual int read_pdu(uint16_t rnti, uint32_t lcid, uint8_t* payload, uint32_t nof_bytes) = 0; virtual void read_pdu_pcch(uint8_t* payload, uint32_t buffer_size) = 0; /* MAC calls RLC to push an RLC PDU. This function is called from an independent MAC thread. * PDU gets placed into the buffer and higher layer thread gets notified. */ virtual void write_pdu(uint16_t rnti, uint32_t lcid, uint8_t* payload, uint32_t nof_bytes) = 0; }; class rlc_interface_pdcp_nr { public: /* PDCP calls RLC to push an RLC SDU. SDU gets placed into the RLC buffer and MAC pulls * RLC PDUs according to TB size. */ virtual void write_sdu(uint16_t rnti, uint32_t lcid, srsran::unique_byte_buffer_t sdu) = 0; virtual bool rb_is_um(uint16_t rnti, uint32_t lcid) = 0; virtual bool sdu_queue_is_full(uint16_t rnti, uint32_t lcid) = 0; }; class rlc_interface_rrc_nr { public: virtual void clear_buffer(uint16_t rnti) = 0; virtual void add_user(uint16_t rnti) = 0; virtual void rem_user(uint16_t rnti) = 0; virtual void add_bearer(uint16_t rnti, uint32_t lcid, srsran::rlc_config_t cnfg) = 0; virtual void add_bearer_mrb(uint16_t rnti, uint32_t lcid) = 0; virtual void write_sdu(uint16_t rnti, uint32_t lcid, srsran::unique_byte_buffer_t sdu) = 0; }; /***************************** * PDCP INTERFACES ****************************/ class pdcp_interface_rlc_nr { public: /* RLC calls PDCP to push a PDCP PDU. */ virtual void write_pdu(uint16_t rnti, uint32_t lcid, srsran::unique_byte_buffer_t sdu) = 0; virtual void notify_delivery(uint16_t rnti, uint32_t lcid, const srsran::pdcp_sn_vector_t& pdcp_sns) = 0; virtual void notify_failure(uint16_t rnti, uint32_t lcid, const srsran::pdcp_sn_vector_t& pdcp_sns) = 0; }; class pdcp_interface_rrc_nr { public: virtual void reset(uint16_t rnti) = 0; virtual void add_user(uint16_t rnti) = 0; virtual void rem_user(uint16_t rnti) = 0; virtual void write_sdu(uint16_t rnti, uint32_t lcid, srsran::unique_byte_buffer_t sdu) = 0; virtual void add_bearer(uint16_t rnti, uint32_t lcid, srsran::pdcp_config_t cnfg) = 0; virtual void config_security(uint16_t rnti, uint32_t lcid, srsran::as_security_config_t sec_cfg) = 0; virtual void enable_integrity(uint16_t rnti, uint32_t lcid) = 0; virtual void enable_encryption(uint16_t rnti, uint32_t lcid) = 0; }; class pdcp_interface_sdap_nr { public: virtual void write_sdu(uint16_t rnti, uint32_t lcid, srsran::unique_byte_buffer_t pdu) = 0; }; /***************************** * SDAP INTERFACES ****************************/ class sdap_interface_pdcp_nr { public: virtual void write_pdu(uint16_t rnti, uint32_t lcid, srsran::unique_byte_buffer_t pdu) = 0; }; class sdap_interface_gtpu_nr { public: virtual void write_sdu(uint16_t rnti, uint32_t lcid, srsran::unique_byte_buffer_t pdu) = 0; }; /***************************** * GTPU INTERFACES ****************************/ class gtpu_interface_rrc_nr { public: }; class gtpu_interface_sdap_nr { public: virtual void write_pdu(uint16_t rnti, uint32_t lcid, srsran::unique_byte_buffer_t pdu) = 0; }; /***************************** * RRC INTERFACES ****************************/ class rrc_interface_phy_nr {}; class rrc_interface_mac_nr { public: // Provides MIB packed message virtual int read_pdu_bcch_bch(const uint32_t tti, srsran::unique_byte_buffer_t& buffer) = 0; virtual int read_pdu_bcch_dlsch(uint32_t sib_index, srsran::unique_byte_buffer_t& buffer) = 0; }; class rrc_interface_rlc_nr { public: virtual void read_pdu_pcch(uint8_t* payload, uint32_t payload_size) = 0; virtual void max_retx_attempted(uint16_t rnti) = 0; virtual void protocol_failure(uint16_t rnti) = 0; virtual void write_pdu(uint16_t rnti, uint32_t lcid, srsran::unique_byte_buffer_t sdu) = 0; virtual const char* get_rb_name(uint32_t lcid) = 0; }; class rrc_interface_pdcp_nr { public: virtual void write_pdu(uint16_t rnti, uint32_t lcid, srsran::unique_byte_buffer_t pdu) = 0; virtual void notify_pdcp_integrity_error(uint16_t rnti, uint32_t lcid) = 0; }; class phy_interface_stack_nr { public: const static int MAX_DL_GRANTS = 4; typedef struct { // TODO: include NR related fields } dl_sched_grant_t; typedef struct { bool mib_present; } bch_sched_t; typedef struct { uint32_t tti; uint32_t nof_grants; dl_sched_grant_t pdsch[MAX_DL_GRANTS]; int beam_id; } dl_config_request_t; typedef struct { bch_sched_t pbch; uint16_t length; uint16_t index; // index indicated in dl_config uint8_t* data[SRSRAN_MAX_TB]; // always a pointer in our case } tx_request_pdu_t; typedef struct { uint32_t tti; uint32_t tb_len; uint32_t nof_pdus; tx_request_pdu_t pdus[MAX_DL_GRANTS]; } tx_request_t; virtual int dl_config_request(const dl_config_request_t& request) = 0; virtual int tx_request(const tx_request_t& request) = 0; }; class stack_interface_mac { public: ///< MAC calls stack to inform about new PDUs having arrived to be further processes in stack thread virtual void process_pdus() = 0; }; class mac_interface_phy_nr { public: const static int MAX_SSB = 4; const static int MAX_GRANTS = 64; const static int MAX_NZP_CSI_RS = 4; struct pdcch_dl_t { srsran_dci_cfg_nr_t dci_cfg = {}; srsran_dci_dl_nr_t dci = {}; }; struct pdcch_ul_t { srsran_dci_cfg_nr_t dci_cfg = {}; srsran_dci_ul_nr_t dci = {}; }; struct pdsch_t { srsran_sch_cfg_nr_t sch = {}; ///< PDSCH configuration std::array data = {}; ///< Data pointer }; struct ssb_t { srsran_pbch_msg_nr_t pbch_msg = {}; }; struct dl_sched_t { srsran::bounded_vector ssb; srsran::bounded_vector pdcch_dl; srsran::bounded_vector pdcch_ul; srsran::bounded_vector pdsch; srsran::bounded_vector nzp_csi_rs; }; struct pusch_t { srsran_sch_cfg_nr_t sch = {}; ///< PUSCH configuration std::array data = {}; ///< Data pointer std::array softbuffer_tx = {}; ///< Tx Softbuffer }; struct pucch_t { srsran_uci_cfg_nr_t uci_cfg; srsran_pucch_nr_resource_t resource; }; struct ul_sched_t { srsran::bounded_vector pusch; srsran::bounded_vector pucch; }; virtual int slot_indication(const srsran_slot_cfg_t& slot_cfg) = 0; virtual int get_dl_sched(const srsran_slot_cfg_t& slot_cfg, dl_sched_t& dl_sched) = 0; virtual int get_ul_sched(const srsran_slot_cfg_t& slot_cfg, ul_sched_t& ul_sched) = 0; }; class stack_interface_phy_nr : public mac_interface_phy_nr, public srsran::stack_interface_phy_nr { public: struct rx_data_ind_t { uint32_t tti; uint16_t rnti; srsran::unique_byte_buffer_t tb; }; virtual int rx_data_indication(rx_data_ind_t& grant) = 0; }; } // namespace srsenb #endif // SRSRAN_GNB_INTERFACES_H