/* * Copyright 2013-2020 Software Radio Systems Limited * * This file is part of srsLTE. * * srsLTE 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. * * srsLTE 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/. * */ #include "srslte/srslte.h" #include "srslte/asn1/rrc_asn1.h" #include "srslte/asn1/s1ap_asn1.h" #include "srslte/common/common.h" #include "srslte/common/interfaces_common.h" #include "srslte/common/multiqueue.h" #include "srslte/common/security.h" #include "srslte/interfaces/rrc_interface_types.h" #include "srslte/interfaces/sched_interface.h" #include "srslte/upper/pdcp_config.h" #include #ifndef SRSLTE_ENB_INTERFACES_H #define SRSLTE_ENB_INTERFACES_H namespace srsenb { /* Interface PHY -> MAC */ class mac_interface_phy_lte { public: const static int MAX_GRANTS = 64; /** * DL grant structure per UE */ typedef struct { srslte_dci_dl_t dci; srslte_dci_cfg_t dci_cfg; uint8_t* data[SRSLTE_MAX_TB]; srslte_softbuffer_tx_t* softbuffer_tx[SRSLTE_MAX_TB]; } dl_sched_grant_t; /** * DL Scheduling result per cell/carrier */ typedef struct { dl_sched_grant_t pdsch[MAX_GRANTS]; //< DL Grants uint32_t nof_grants; //< Number of DL grants uint32_t cfi; //< Current CFI of the cell, it can vary across cells } dl_sched_t; /** * List of DL scheduling results, one entry per cell/carrier */ typedef std::vector dl_sched_list_t; typedef struct { uint16_t rnti; bool ack; } ul_sched_ack_t; /** * UL grant information per UE */ typedef struct { srslte_dci_ul_t dci; srslte_dci_cfg_t dci_cfg; uint32_t current_tx_nb; uint8_t* data; bool needs_pdcch; srslte_softbuffer_rx_t* softbuffer_rx; } ul_sched_grant_t; /** * UL Scheduling result per cell/carrier */ typedef struct { ul_sched_grant_t pusch[MAX_GRANTS]; ul_sched_ack_t phich[MAX_GRANTS]; uint32_t nof_grants; uint32_t nof_phich; } ul_sched_t; /** * List of UL scheduling results, one entry per cell/carrier */ typedef std::vector ul_sched_list_t; virtual int sr_detected(uint32_t tti, uint16_t rnti) = 0; virtual void rach_detected(uint32_t tti, uint32_t primary_cc_idx, uint32_t preamble_idx, uint32_t time_adv) = 0; /** * PHY callback for giving MAC the Rank Indicator information of a given RNTI for an eNb cell/carrier. * * @param tti the given TTI * @param rnti the UE identifier in the eNb * @param cc_idx The eNb Cell/Carrier where the measurement corresponds * @param ri_value the actual Rank Indicator value, 0 for 1 layer, 1 for two layers and so on. * @return SRSLTE_SUCCESS if no error occurs, SRSLTE_ERROR* if an error occurs */ virtual int ri_info(uint32_t tti, uint16_t rnti, uint32_t cc_idx, uint32_t ri_value) = 0; /** * PHY callback for giving MAC the Pre-coding Matrix Indicator information of a given RNTI for an eNb cell/carrier. * * @param tti the given TTI * @param rnti the UE identifier in the eNb * @param cc_idx The eNb Cell/Carrier where the measurement corresponds * @param pmi_value the actual PMI value * @return SRSLTE_SUCCESS if no error occurs, SRSLTE_ERROR* if an error occurs */ virtual int pmi_info(uint32_t tti, uint16_t rnti, uint32_t cc_idx, uint32_t pmi_value) = 0; /** * PHY callback for for giving MAC the Channel Quality information of a given RNTI, TTI and eNb cell/carrier * @param tti the given TTI * @param rnti the UE identifier in the eNb * @param cc_idx The eNb Cell/Carrier where the measurement corresponds * @param cqi_value the corresponding Channel Quality Information * @return SRSLTE_SUCCESS if no error occurs, SRSLTE_ERROR* if an error occurs */ virtual int cqi_info(uint32_t tti, uint16_t rnti, uint32_t cc_idx, uint32_t cqi_value) = 0; /** * PHY callback for giving MAC the SNR in dB of an UL transmission for a given RNTI at a given carrier * * @param tti The measurement was made * @param rnti The UE identifier in the eNb * @param cc_idx The eNb Cell/Carrier where the UL transmission was received * @param snr_db The actual SNR of the received signal * @return SRSLTE_SUCCESS if no error occurs, SRSLTE_ERROR* if an error occurs */ virtual int snr_info(uint32_t tti, uint16_t rnti, uint32_t cc_idx, float snr_db) = 0; /** * PHY callback for giving MAC the Time Aligment information in microseconds of a given RNTI during a TTI processing * * @param tti The measurement was made * @param rnti The UE identifier in the eNb * @param ta_us The actual time alignment in microseconds * @return SRSLTE_SUCCESS if no error occurs, SRSLTE_ERROR* if an error occurs */ virtual int ta_info(uint32_t tti, uint16_t rnti, float ta_us) = 0; /** * PHY callback for giving MAC the HARQ DL ACK/NACK feedback information for a given RNTI, TTI, eNb cell/carrier and * Transport block. * * @param tti the given TTI * @param rnti the UE identifier in the eNb * @param cc_idx the eNb Cell/Carrier identifier * @param tb_idx the transport block index * @param ack true for ACK, false for NACK, do not call for DTX * @return SRSLTE_SUCCESS if no error occurs, SRSLTE_ERROR* if an error occurs */ virtual int ack_info(uint32_t tti, uint16_t rnti, uint32_t cc_idx, uint32_t tb_idx, bool ack) = 0; /** * Informs MAC about a received PUSCH transmission for given RNTI, TTI and eNb Cell/carrier. * * @param tti the given TTI * @param rnti the UE identifier in the eNb * @param cc_idx the eNb Cell/Carrier identifier * @param nof_bytes the number of grants carrierd by the PUSCH message * @param crc_res the CRC check, set to true if the message was decoded succesfully * @return SRSLTE_SUCCESS if no error occurs, SRSLTE_ERROR* if an error occurs */ virtual int crc_info(uint32_t tti, uint16_t rnti, uint32_t cc_idx, uint32_t nof_bytes, bool crc_res) = 0; virtual int get_dl_sched(uint32_t tti, dl_sched_list_t& dl_sched_res) = 0; virtual int get_mch_sched(uint32_t tti, bool is_mcch, dl_sched_list_t& dl_sched_res) = 0; virtual int get_ul_sched(uint32_t tti, ul_sched_list_t& ul_sched_res) = 0; virtual void set_sched_dl_tti_mask(uint8_t* tti_mask, uint32_t nof_sfs) = 0; // Radio-Link status virtual void rl_failure(uint16_t rnti) = 0; virtual void rl_ok(uint16_t rnti) = 0; }; /* Interface MAC -> PHY */ class phy_interface_mac_lte { public: /** * Interface for MAC to add or modify user in the active UE database setting. This function requires a primary cell * (PCell) index and a list of secondary cells (SCell) for the UE. The elements in the list SCell list must follow the * UE's SCell indexes order. * * @param rnti identifier of the user * @param pcell_index Primary cell (PCell) index * @param is_temporal Indicates whether the UE is temporal */ virtual int add_rnti(uint16_t rnti, uint32_t pcell_index, bool is_temporal) = 0; /** * Removes an RNTI context from all the physical layer components, including secondary cells * @param rnti identifier of the user */ virtual void rem_rnti(uint16_t rnti) = 0; /** * * @param stop */ virtual void set_mch_period_stop(uint32_t stop) = 0; /** * Activates and/or deactivates Secondary Cells in the PHY for a given RNTI. Requires the RNTI of the given UE and a * vector with the activation/deactivation values. Use true for activation and false for deactivation. The index 0 is * reserved for PCell and will not be used. * * @param rnti identifier of the user * @param activation vector with the activate/deactivate. */ virtual void set_activation_deactivation_scell(uint16_t rnti, const std::array& activation) = 0; }; /* Interface RRC -> PHY */ class phy_interface_rrc_lte { public: struct phy_cfg_mbsfn_t { asn1::rrc::mbsfn_sf_cfg_s mbsfn_subfr_cnfg; asn1::rrc::mbms_notif_cfg_r9_s mbsfn_notification_cnfg; asn1::rrc::mbsfn_area_info_r9_s mbsfn_area_info; asn1::rrc::mcch_msg_s mcch; }; typedef struct { phy_cfg_mbsfn_t mbsfn; } phy_rrc_cfg_t; virtual void configure_mbsfn(asn1::rrc::sib_type2_s* sib2, asn1::rrc::sib_type13_r9_s* sib13, asn1::rrc::mcch_msg_s mcch) = 0; typedef struct { bool configured = false; ///< Indicates whether PHY shall consider configuring this cell/carrier uint32_t enb_cc_idx = 0; ///< eNb Cell index srslte::phy_cfg_t phy_cfg = {}; ///< Dedicated physical layer configuration } phy_rrc_dedicated_t; typedef std::vector phy_rrc_dedicated_list_t; /** * Sets the physical layer dedicated configuration for a given RNTI, a cell index and a secondary cell index. * The cc_idx indicates the eNb cell to configure and the scell_idx is the UE's cell index * * @param rnti the given RNTI * @param dedicated_list Physical layer configuration for the indicated eNb cell */ virtual void set_config_dedicated(uint16_t rnti, const phy_rrc_dedicated_list_t& dedicated_list) = 0; }; class mac_interface_rrc { public: /* Provides cell configuration including SIB periodicity, etc. */ virtual int cell_cfg(const std::vector& cell_cfg) = 0; virtual void reset() = 0; /* Manages UE configuration context */ virtual int ue_cfg(uint16_t rnti, sched_interface::ue_cfg_t* cfg) = 0; virtual int ue_rem(uint16_t rnti) = 0; /* Manages UE bearers and associated configuration */ virtual int bearer_ue_cfg(uint16_t rnti, uint32_t lc_id, sched_interface::ue_bearer_cfg_t* cfg) = 0; virtual int bearer_ue_rem(uint16_t rnti, uint32_t lc_id) = 0; virtual void phy_config_enabled(uint16_t rnti, bool enabled) = 0; virtual void write_mcch(asn1::rrc::sib_type2_s* sib2, asn1::rrc::sib_type13_r9_s* sib13, asn1::rrc::mcch_msg_s* mcch) = 0; }; class mac_interface_rlc { public: virtual int rlc_buffer_state(uint16_t rnti, uint32_t lc_id, uint32_t tx_queue, uint32_t retx_queue) = 0; }; // RLC interface for MAC class rlc_interface_mac { 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; }; // RLC interface for PDCP class rlc_interface_pdcp { 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, srslte::unique_byte_buffer_t sdu) = 0; virtual void discard_sdu(uint16_t rnti, uint32_t lcid, uint32_t sn) = 0; virtual bool rb_is_um(uint16_t rnti, uint32_t lcid) = 0; }; // RLC interface for RRC class rlc_interface_rrc { 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, srslte::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, srslte::unique_byte_buffer_t sdu) = 0; virtual bool has_bearer(uint16_t rnti, uint32_t lcid) = 0; virtual bool suspend_bearer(uint16_t rnti, uint32_t lcid) = 0; virtual bool resume_bearer(uint16_t rnti, uint32_t lcid) = 0; }; // PDCP interface for GTPU class pdcp_interface_gtpu { public: virtual void write_sdu(uint16_t rnti, uint32_t lcid, srslte::unique_byte_buffer_t sdu) = 0; }; // PDCP interface for RRC class pdcp_interface_rrc { 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, srslte::unique_byte_buffer_t sdu) = 0; virtual void add_bearer(uint16_t rnti, uint32_t lcid, srslte::pdcp_config_t cnfg) = 0; virtual void config_security(uint16_t rnti, uint32_t lcid, srslte::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; virtual bool get_bearer_status(uint16_t rnti, uint32_t lcid, uint16_t* dlsn, uint16_t* dlhfn, uint16_t* ulsn, uint16_t* ulhfn) = 0; }; // PDCP interface for RLC class pdcp_interface_rlc { public: /* RLC calls PDCP to push a PDCP PDU. */ virtual void write_pdu(uint16_t rnti, uint32_t lcid, srslte::unique_byte_buffer_t sdu) = 0; }; // RRC interface for RLC class rrc_interface_rlc { 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 write_pdu(uint16_t rnti, uint32_t lcid, srslte::unique_byte_buffer_t sdu) = 0; }; // RRC interface for MAC class rrc_interface_mac { public: /* Radio Link failure */ virtual void rl_failure(uint16_t rnti) = 0; virtual void add_user(uint16_t rnti, const sched_interface::ue_cfg_t& init_ue_cfg) = 0; virtual void upd_user(uint16_t new_rnti, uint16_t old_rnti) = 0; virtual void set_activity_user(uint16_t rnti) = 0; virtual bool is_paging_opportunity(uint32_t tti, uint32_t* payload_len) = 0; ///< Provide packed SIB to MAC (buffer is managed by RRC) virtual uint8_t* read_pdu_bcch_dlsch(const uint8_t enb_cc_idx, const uint32_t sib_index) = 0; }; // SCell configuration struct scell_cfg_t { uint32_t cell_id; bool cross_carrier_sched = false; uint32_t sched_cell_id; bool ul_allowed; }; // Cell/Sector configuration struct cell_cfg_t { uint32_t rf_port; uint32_t cell_id; uint16_t tac; uint32_t pci; uint16_t root_seq_idx; uint32_t dl_earfcn; double dl_freq_hz; uint32_t ul_earfcn; double ul_freq_hz; uint32_t initial_dl_cqi; std::vector scell_list; }; typedef std::vector cell_list_t; // RRC interface for PDCP class rrc_interface_pdcp { public: virtual void write_pdu(uint16_t rnti, uint32_t lcid, srslte::unique_byte_buffer_t pdu) = 0; }; // RRC interface for S1AP class rrc_interface_s1ap { public: virtual void write_dl_info(uint16_t rnti, srslte::unique_byte_buffer_t sdu) = 0; virtual void release_complete(uint16_t rnti) = 0; virtual bool setup_ue_ctxt(uint16_t rnti, const asn1::s1ap::init_context_setup_request_s& msg) = 0; virtual bool modify_ue_ctxt(uint16_t rnti, const asn1::s1ap::ue_context_mod_request_s& msg) = 0; virtual bool setup_ue_erabs(uint16_t rnti, const asn1::s1ap::erab_setup_request_s& msg) = 0; virtual bool release_erabs(uint32_t rnti) = 0; virtual void add_paging_id(uint32_t ueid, const asn1::s1ap::ue_paging_id_c& ue_paging_id) = 0; virtual void ho_preparation_complete(uint16_t rnti, bool is_success, srslte::unique_byte_buffer_t container) = 0; }; // GTPU interface for PDCP class gtpu_interface_pdcp { public: virtual void write_pdu(uint16_t rnti, uint32_t lcid, srslte::unique_byte_buffer_t pdu) = 0; }; // GTPU interface for RRC class gtpu_interface_rrc { public: virtual void add_bearer(uint16_t rnti, uint32_t lcid, uint32_t addr, uint32_t teid_out, uint32_t* teid_in) = 0; virtual void rem_bearer(uint16_t rnti, uint32_t lcid) = 0; virtual void rem_user(uint16_t rnti) = 0; }; // S1AP interface for RRC class s1ap_interface_rrc { public: struct bearer_status_info { uint8_t erab_id; uint16_t pdcp_dl_sn, pdcp_ul_sn; uint16_t dl_hfn, ul_hfn; }; virtual void initial_ue(uint16_t rnti, asn1::s1ap::rrc_establishment_cause_e cause, srslte::unique_byte_buffer_t pdu) = 0; virtual void initial_ue(uint16_t rnti, asn1::s1ap::rrc_establishment_cause_e cause, srslte::unique_byte_buffer_t pdu, uint32_t m_tmsi, uint8_t mmec) = 0; virtual void write_pdu(uint16_t rnti, srslte::unique_byte_buffer_t pdu) = 0; virtual bool user_exists(uint16_t rnti) = 0; virtual bool user_release(uint16_t rnti, asn1::s1ap::cause_radio_network_e cause_radio) = 0; virtual void ue_ctxt_setup_complete(uint16_t rnti, const asn1::s1ap::init_context_setup_resp_s& res) = 0; virtual void ue_erab_setup_complete(uint16_t rnti, const asn1::s1ap::erab_setup_resp_s& res) = 0; virtual bool is_mme_connected() = 0; virtual bool send_ho_required(uint16_t rnti, uint32_t target_eci, srslte::plmn_id_t target_plmn, srslte::unique_byte_buffer_t rrc_container) = 0; virtual bool send_enb_status_transfer_proc(uint16_t rnti, std::vector& bearer_status_list) = 0; }; // Combined interface for PHY to access stack (MAC and RRC) class stack_interface_phy_lte : public mac_interface_phy_lte { public: virtual void tti_clock() = 0; }; // Combined interface for stack (MAC and RRC) to access PHY class phy_interface_stack_lte : public phy_interface_mac_lte, public phy_interface_rrc_lte { }; typedef struct { uint32_t enb_id; // 20-bit id (lsb bits) uint8_t cell_id; // 8-bit cell id uint16_t tac; // 16-bit tac uint16_t mcc; // BCD-coded with 0xF filler uint16_t mnc; // BCD-coded with 0xF filler std::string mme_addr; std::string gtp_bind_addr; std::string s1c_bind_addr; std::string enb_name; } s1ap_args_t; typedef struct { uint32_t nof_prb; ///< Needed to dimension MAC softbuffers for all cells sched_interface::sched_args_t sched; int link_failure_nof_err; } mac_args_t; class stack_interface_s1ap_lte { public: virtual void add_mme_socket(int fd) = 0; virtual void remove_mme_socket(int fd) = 0; }; class stack_interface_gtpu_lte { public: virtual void add_gtpu_s1u_socket_handler(int fd) = 0; virtual void add_gtpu_m1u_socket_handler(int fd) = 0; }; // STACK interface for MAC class stack_interface_mac_lte : public srslte::task_handler_interface { }; } // namespace srsenb #endif // SRSLTE_ENB_INTERFACES_H