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/**
* Copyright 2013-2022 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_NR_H
#define SRSENB_MAC_NR_H
#include "srsran/common/block_queue.h"
#include "srsran/common/mac_pcap.h"
#include "srsenb/hdr/common/rnti_pool.h"
#include "srsenb/hdr/stack/enb_stack_base.h"
#include "srsgnb/hdr/stack/mac/ue_nr.h"
#include "srsran/common/task_scheduler.h"
#include "srsran/interfaces/enb_metrics_interface.h"
#include "srsran/interfaces/enb_rlc_interfaces.h"
#include "srsran/interfaces/gnb_mac_interfaces.h"
namespace srsenb {
struct mac_nr_args_t {
srsran::phy_cfg_nr_t phy_base_cfg = {};
int fixed_dl_mcs = -1;
int fixed_ul_mcs = -1;
sched_nr_interface::sched_args_t sched_cfg = {};
srsenb::pcap_args_t pcap;
};
class sched_nr;
class mac_nr_rx;
class mac_nr final : public mac_interface_phy_nr,
public mac_interface_rrc_nr,
public mac_interface_rlc_nr,
public mac_interface_pdu_demux_nr
{
public:
explicit mac_nr(srsran::task_sched_handle task_sched_);
~mac_nr();
int init(const mac_nr_args_t& args_,
phy_interface_stack_nr* phy,
stack_interface_mac* stack_,
rlc_interface_mac* rlc_,
rrc_interface_mac_nr* rrc_);
void stop();
/// Called from metrics thread.
void get_metrics(srsenb::mac_metrics_t& metrics);
// MAC interface for RRC
int cell_cfg(const std::vector<srsenb::sched_nr_cell_cfg_t>& nr_cells) override;
uint16_t reserve_rnti(uint32_t enb_cc_idx, const sched_nr_interface::ue_cfg_t& uecfg) override;
int read_pdu_bcch_bch(uint8_t* payload);
int ue_cfg(uint16_t rnti, const sched_nr_interface::ue_cfg_t& ue_cfg) override;
int remove_ue(uint16_t rnti) override;
// MAC interface for RLC
int rlc_buffer_state(uint16_t rnti, uint32_t lcid, uint32_t tx_queue, uint32_t retx_queue) override;
// Interface for PHY
int slot_indication(const srsran_slot_cfg_t& slot_cfg) override;
dl_sched_t* get_dl_sched(const srsran_slot_cfg_t& slot_cfg) override;
ul_sched_t* get_ul_sched(const srsran_slot_cfg_t& slot_cfg) override;
int pucch_info(const srsran_slot_cfg_t& slot_cfg, const pucch_info_t& pucch_info) override;
int pusch_info(const srsran_slot_cfg_t& slot_cfg, pusch_info_t& pusch_info) override;
void rach_detected(const rach_info_t& rach_info) override;
// MAC-internal interface
void store_msg3(uint16_t rnti, srsran::unique_byte_buffer_t pdu) override;
// Test interface
void ul_bsr(uint16_t rnti, uint32_t lcid, uint32_t bsr);
private:
uint16_t add_ue_(uint32_t enb_cc_idx);
uint16_t alloc_ue(uint32_t enb_cc_idx);
// internal misc helpers
bool is_rnti_valid_nolock(uint16_t rnti);
bool is_rnti_active_nolock(uint16_t rnti);
// handle UCI data from either PUCCH or PUSCH
bool handle_uci_data(uint16_t rnti, const srsran_uci_cfg_nr_t& cfg, const srsran_uci_value_nr_t& value);
// Metrics processing
void get_metrics_nolock(srsenb::mac_metrics_t& metrics);
// Encoding
srsran::byte_buffer_t* assemble_rar(srsran::const_span<sched_nr_interface::msg3_grant_t> grants);
srsran::unique_byte_buffer_t rar_pdu_buffer;
// Interaction with other components
phy_interface_stack_nr* phy = nullptr;
stack_interface_mac* stack = nullptr;
rlc_interface_mac* rlc = nullptr;
rrc_interface_mac_nr* rrc = nullptr;
// args
srsran::task_sched_handle task_sched;
srsran::task_queue_handle stack_task_queue;
mac_nr_args_t args = {};
srslog::basic_logger& logger;
// initial UE config, before RRC setup (without UE-dedicated)
srsran::phy_cfg_nr_t default_ue_phy_cfg;
std::unique_ptr<srsran::mac_pcap> pcap = nullptr;
std::atomic<bool> started = {false};
const static uint32_t NUMEROLOGY_IDX = 0; /// only 15kHz supported at this stage
std::unique_ptr<srsenb::sched_nr> sched;
std::vector<sched_nr_cell_cfg_t> cell_config;
// Map of active UEs
pthread_rwlock_t rwmutex = {};
static const uint16_t FIRST_RNTI = 0x4601;
srsran::static_circular_map<uint16_t, std::unique_ptr<ue_nr>, SRSENB_MAX_UES> ue_db;
std::atomic<uint16_t> ue_counter{0};
// BCH buffers
struct sib_info_t {
uint32_t index;
uint32_t periodicity;
srsran::unique_byte_buffer_t payload;
};
std::vector<sib_info_t> bcch_dlsch_payload;
srsran::unique_byte_buffer_t bcch_bch_payload = nullptr;
// Number of rach preambles detected for a CC
std::vector<uint32_t> detected_rachs;
// Decoding of UL PDUs
std::unique_ptr<mac_nr_rx> rx;
};
} // namespace srsenb
#endif // SRSENB_MAC_NR_H