/*
 * Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The OpenAirInterface Software Alliance licenses this file to You under
 * the OAI Public License, Version 1.1  (the "License"); you may not use this file
 * except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.openairinterface.org/?page_id=698
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *-------------------------------------------------------------------------------
 * For more information about the OpenAirInterface (OAI) Software Alliance:
 *      contact@openairinterface.org
 */

/* \file proto.h
 * \brief MAC functions prototypes for gNB and UE
 * \author R. Knopp, K.H. HSU
 * \date 2018
 * \version 0.1
 * \company Eurecom / NTUST
 * \email: knopp@eurecom.fr, kai-hsiang.hsu@eurecom.fr
 * \note
 * \warning
 */

#ifndef __LAYER2_MAC_UE_PROTO_H__
#define __LAYER2_MAC_UE_PROTO_H__

#include "mac_defs.h"
#include "oai_asn1.h"
#include "RRC/NR_UE/rrc_defs.h"
#include "nfapi/open-nFAPI/nfapi/public_inc/nfapi_nr_interface.h"

#define NR_DL_MAX_DAI                            (4)                      /* TS 38.213 table 9.1.3-1 Value of counter DAI for DCI format 1_0 and 1_1 */
#define NR_DL_MAX_NB_CW                          (2)                      /* number of downlink code word */

/**\brief initialize the field in nr_mac instance
   \param mac      MAC pointer */
void nr_ue_init_mac(NR_UE_MAC_INST_t *mac);

void send_srb0_rrc(int ue_id, const uint8_t *sdu, sdu_size_t sdu_len, void *data);
void update_mac_timers(NR_UE_MAC_INST_t *mac);
NR_LC_SCHEDULING_INFO *get_scheduling_info_from_lcid(NR_UE_MAC_INST_t *mac, NR_LogicalChannelIdentity_t lcid);

/**\brief apply default configuration values in nr_mac instance
   \param mac           mac instance */
void nr_ue_mac_default_configs(NR_UE_MAC_INST_t *mac);

void nr_ue_decode_mib(NR_UE_MAC_INST_t *mac, int cc_id);

void release_common_ss_cset(NR_BWP_PDCCH_t *pdcch);

/**\brief decode SIB1 and other SIs pdus in NR_UE, from if_module dl_ind
   \param mac            pointer to MAC instance
   \param cc_id          component carrier id
   \param gNB_index      gNB index
   \param sibs_mask      sibs mask
   \param pduP           pointer to pdu
   \param pdu_length     length of pdu */
int8_t nr_ue_decode_BCCH_DL_SCH(NR_UE_MAC_INST_t *mac,
                                int cc_id,
                                unsigned int gNB_index,
                                uint8_t ack_nack,
                                uint8_t *pduP,
                                uint32_t pdu_len);

void release_dl_BWP(NR_UE_MAC_INST_t *mac, int index);
void release_ul_BWP(NR_UE_MAC_INST_t *mac, int index);
void nr_release_mac_config_logicalChannelBearer(NR_UE_MAC_INST_t *mac, long channel_identity);

void nr_rrc_mac_config_req_cg(module_id_t module_id,
                              int cc_idP,
                              NR_CellGroupConfig_t *cell_group_config,
                              NR_UE_NR_Capability_t *ue_Capability);

void nr_rrc_mac_config_req_mib(module_id_t module_id,
                               int cc_idP,
                               NR_MIB_t *mibP,
                               int sched_sib1);

void nr_rrc_mac_config_req_sib1(module_id_t module_id,
                                int cc_idP,
                                NR_SI_SchedulingInfo_t *si_SchedulingInfo,
                                NR_ServingCellConfigCommonSIB_t *scc);

void nr_rrc_mac_config_req_reset(module_id_t module_id, NR_UE_MAC_reset_cause_t cause);

/**\brief initialization NR UE MAC instance(s)*/
NR_UE_MAC_INST_t * nr_l2_init_ue(int nb_inst);

/**\brief fetch MAC instance by module_id
   \param module_id index of MAC instance(s)*/
NR_UE_MAC_INST_t *get_mac_inst(module_id_t module_id);

void reset_mac_inst(NR_UE_MAC_INST_t *nr_mac);
void reset_ra(NR_UE_MAC_INST_t *nr_mac, bool free_prach);
void release_mac_configuration(NR_UE_MAC_INST_t *mac,
                               NR_UE_MAC_reset_cause_t cause);

/**\brief called at each slot, slot length based on numerology. now use u=0, scs=15kHz, slot=1ms
          performs BSR/SR/PHR procedures, random access procedure handler and DLSCH/ULSCH procedures.
   \param dl_info     DL indication
   \param ul_info     UL indication*/
void nr_ue_ul_scheduler(NR_UE_MAC_INST_t *mac, nr_uplink_indication_t *ul_info);
void nr_ue_dl_scheduler(NR_UE_MAC_INST_t *mac, nr_downlink_indication_t *dl_info);

/*! \fn int8_t nr_ue_get_SR(NR_UE_MAC_INST_t *mac, frame_t frame, slot_t slot, NR_SchedulingRequestId_t sr_id);
   \brief This function schedules a positive or negative SR for schedulingRequestID sr_id
          depending on the presence of any active SR and the prohibit timer.
          If the max number of retransmissions is reached, it triggers a new RA  */
int8_t nr_ue_get_SR(NR_UE_MAC_INST_t *mac, frame_t frame, slot_t slot, NR_SchedulingRequestId_t sr_id);

nr_dci_format_t nr_ue_process_dci_indication_pdu(NR_UE_MAC_INST_t *mac, frame_t frame, int slot, fapi_nr_dci_indication_pdu_t *dci);

int8_t nr_ue_process_csirs_measurements(NR_UE_MAC_INST_t *mac,
                                        frame_t frame,
                                        int slot,
                                        fapi_nr_csirs_measurements_t *csirs_measurements);
void nr_ue_aperiodic_srs_scheduling(NR_UE_MAC_INST_t *mac, long resource_trigger, int frame, int slot);

bool trigger_periodic_scheduling_request(NR_UE_MAC_INST_t *mac,
                                         PUCCH_sched_t *pucch,
                                         frame_t frame,
                                         int slot);

int nr_get_csi_measurements(NR_UE_MAC_INST_t *mac, frame_t frame, int slot, PUCCH_sched_t *pucch);

uint8_t get_ssb_rsrp_payload(NR_UE_MAC_INST_t *mac,
                             PUCCH_sched_t *pucch,
                             struct NR_CSI_ReportConfig *csi_reportconfig,
                             NR_CSI_ResourceConfigId_t csi_ResourceConfigId,
                             NR_CSI_MeasConfig_t *csi_MeasConfig);

uint8_t get_csirs_RI_PMI_CQI_payload(NR_UE_MAC_INST_t *mac,
                                     PUCCH_sched_t *pucch,
                                     struct NR_CSI_ReportConfig *csi_reportconfig,
                                     NR_CSI_ResourceConfigId_t csi_ResourceConfigId,
                                     NR_CSI_MeasConfig_t *csi_MeasConfig);

uint8_t get_csirs_RSRP_payload(NR_UE_MAC_INST_t *mac,
                               PUCCH_sched_t *pucch,
                               struct NR_CSI_ReportConfig *csi_reportconfig,
                               NR_CSI_ResourceConfigId_t csi_ResourceConfigId,
                               NR_CSI_MeasConfig_t *csi_MeasConfig);

uint8_t nr_get_csi_payload(NR_UE_MAC_INST_t *mac,
                           PUCCH_sched_t *pucch,
                           int csi_report_id,
                           NR_CSI_MeasConfig_t *csi_MeasConfig);

uint8_t get_rsrp_index(int rsrp);
uint8_t get_rsrp_diff_index(int best_rsrp,int current_rsrp);

/* \brief Get payload (MAC PDU) from UE PHY
@param dl_info            pointer to dl indication
@param ul_time_alignment  pointer to timing advance parameters
@param pdu_id             index of DL PDU
@returns void
*/
void nr_ue_send_sdu(NR_UE_MAC_INST_t *mac, nr_downlink_indication_t *dl_info, int pdu_id);

void nr_ue_process_mac_pdu(NR_UE_MAC_INST_t *mac,nr_downlink_indication_t *dl_info, int pdu_id);

int nr_write_ce_ulsch_pdu(uint8_t *mac_ce,
                          NR_UE_MAC_INST_t *mac,
                          uint8_t power_headroom, // todo: NR_POWER_HEADROOM_CMD *power_headroom,
                          uint16_t *crnti,
                          NR_BSR_SHORT *truncated_bsr,
                          NR_BSR_SHORT *short_bsr,
                          NR_BSR_LONG  *long_bsr);

void config_dci_pdu(NR_UE_MAC_INST_t *mac,
                    fapi_nr_dl_config_request_t *dl_config,
                    const int rnti_type,
                    const int slot,
                    const NR_SearchSpace_t *ss);

void ue_dci_configuration(NR_UE_MAC_INST_t *mac, fapi_nr_dl_config_request_t *dl_config, const frame_t frame, const int slot);

uint8_t nr_ue_get_sdu(NR_UE_MAC_INST_t *mac,
                      int cc_id,
                      frame_t frameP,
                      sub_frame_t subframe,
                      uint8_t gNB_index,
                      uint8_t *ulsch_buffer,
                      uint16_t buflen);

void set_harq_status(NR_UE_MAC_INST_t *mac,
                     uint8_t pucch_id,
                     uint8_t harq_id,
                     int8_t delta_pucch,
                     uint8_t data_toul_fb,
                     uint8_t dai,
                     int n_CCE,
                     int N_CCE,
                     frame_t frame,
                     int slot);

bool get_downlink_ack(NR_UE_MAC_INST_t *mac, frame_t frame, int slot, PUCCH_sched_t *pucch);

void multiplex_pucch_resource(NR_UE_MAC_INST_t *mac, PUCCH_sched_t *pucch, int num_res);

int16_t get_pucch_tx_power_ue(NR_UE_MAC_INST_t *mac,
                              int scs,
                              NR_PUCCH_Config_t *pucch_Config,
                              int delta_pucch,
                              uint8_t format_type,
                              uint16_t nb_of_prbs,
                              uint8_t freq_hop_flag,
                              uint8_t add_dmrs_flag,
                              uint8_t N_symb_PUCCH,
                              int subframe_number,
                              int O_uci);

int get_deltatf(uint16_t nb_of_prbs,
                uint8_t N_symb_PUCCH,
                uint8_t freq_hop_flag,
                uint8_t add_dmrs_flag,
                int N_sc_ctrl_RB,
                int O_UCI);

int nr_ue_configure_pucch(NR_UE_MAC_INST_t *mac,
                           int slot,
                           uint16_t rnti,
                           PUCCH_sched_t *pucch,
                           fapi_nr_ul_config_pucch_pdu *pucch_pdu);

int nr_get_Pcmax(NR_UE_MAC_INST_t *mac, int Qm, bool powerBoostPi2BPSK, int scs, int N_RB_UL, bool is_transform_precoding, int n_prbs, int start_prb);

/* Random Access */

/* \brief This function schedules the PRACH according to prach_ConfigurationIndex and TS 38.211 tables 6.3.3.2.x
and fills the PRACH PDU per each FD occasion.
@param mac pointer to MAC instance
@param frameP Frame index
@param slotP Slot index
@returns void
*/
void nr_ue_pucch_scheduler(NR_UE_MAC_INST_t *mac, frame_t frameP, int slotP, void *phy_data);
void nr_schedule_csirs_reception(NR_UE_MAC_INST_t *mac, int frame, int slot);
void nr_schedule_csi_for_im(NR_UE_MAC_INST_t *mac, int frame, int slot);

/* \brief This function schedules the Msg3 transmission
@param
@param
@param
@returns void
*/
void nr_ue_msg3_scheduler(NR_UE_MAC_INST_t *mac,
                          frame_t current_frame,
                          sub_frame_t current_slot,
                          uint8_t Msg3_tda_id);

void nr_ue_contention_resolution(NR_UE_MAC_INST_t *mac, int cc_id, frame_t frame, int slot, NR_PRACH_RESOURCES_t *prach_resources);

void nr_ra_failed(NR_UE_MAC_INST_t *mac, uint8_t CC_id, NR_PRACH_RESOURCES_t *prach_resources, frame_t frame, int slot);

void nr_ra_succeeded(NR_UE_MAC_INST_t *mac, const uint8_t gNB_index, const frame_t frame, const int slot);

void nr_get_RA_window(NR_UE_MAC_INST_t *mac);

/* \brief Function called by PHY to retrieve information to be transmitted using the RA procedure.
If the UE is not in PUSCH mode for a particular eNB index, this is assumed to be an Msg3 and MAC
attempts to retrieves the CCCH message from RRC. If the UE is in PUSCH mode for a particular eNB
index and PUCCH format 0 (Scheduling Request) is not activated, the MAC may use this resource for
andom-access to transmit a BSR along with the C-RNTI control element (see 5.1.4 from 38.321)
@param mod_id Index of UE instance
@param CC_id Component Carrier Index
@param frame
@param gNB_id gNB index
@param nr_slot_tx slot for PRACH transmission
@returns indication to generate PRACH to phy */
void nr_ue_get_rach(NR_UE_MAC_INST_t *mac, int CC_id, frame_t frame, uint8_t gNB_id, int nr_slot_tx);

/* \brief Function implementing the routine for the selection of Random Access resources (5.1.2 TS 38.321).
@param mac pointer to MAC instance
@param CC_id Component Carrier Index
@param gNB_index gNB index
@param rach_ConfigDedicated
@returns void */
void nr_get_prach_resources(NR_UE_MAC_INST_t *mac,
                            int CC_id,
                            uint8_t gNB_id,
                            NR_PRACH_RESOURCES_t *prach_resources,
                            NR_RACH_ConfigDedicated_t * rach_ConfigDedicated);

void prepare_msg4_feedback(NR_UE_MAC_INST_t *mac, int pid, int ack_nack);
void configure_initial_pucch(PUCCH_sched_t *pucch, int res_ind);
void release_PUCCH_SRS(NR_UE_MAC_INST_t *mac);
void nr_ue_reset_sync_state(NR_UE_MAC_INST_t *mac);
void nr_ue_send_synch_request(NR_UE_MAC_INST_t *mac, module_id_t module_id, int cc_id, int cell_id);

/**
 * @brief   Get UE sync state
 * @param   mod_id      UE ID
 * @return      UE sync state
 */
NR_UE_L2_STATE_t nr_ue_get_sync_state(module_id_t mod_id);

void init_RA(NR_UE_MAC_INST_t *mac,
             NR_PRACH_RESOURCES_t *prach_resources,
             NR_RACH_ConfigCommon_t *nr_rach_ConfigCommon,
             NR_RACH_ConfigGeneric_t *rach_ConfigGeneric,
             NR_RACH_ConfigDedicated_t *rach_ConfigDedicated);

int16_t get_prach_tx_power(NR_UE_MAC_INST_t *mac);
void free_rach_structures(NR_UE_MAC_INST_t *nr_mac, int bwp_id);
void schedule_RA_after_SR_failure(NR_UE_MAC_INST_t *mac);
void nr_Msg1_transmitted(NR_UE_MAC_INST_t *mac);
void nr_Msg3_transmitted(NR_UE_MAC_INST_t *mac, uint8_t CC_id, frame_t frameP, slot_t slotP, uint8_t gNB_id);
void nr_get_msg3_payload(NR_UE_MAC_INST_t *mac, uint8_t *buf, int TBS_max);

int8_t nr_ue_process_dci_freq_dom_resource_assignment(nfapi_nr_ue_pusch_pdu_t *pusch_config_pdu,
                                                      fapi_nr_dl_config_dlsch_pdu_rel15_t *dlsch_config_pdu,
                                                      NR_PDSCH_Config_t *pdsch_Config,
                                                      uint16_t n_RB_ULBWP,
                                                      uint16_t n_RB_DLBWP,
                                                      int start_DLBWP,
                                                      dci_field_t frequency_domain_assignment);

void build_ssb_to_ro_map(NR_UE_MAC_INST_t *mac);

void ue_init_config_request(NR_UE_MAC_INST_t *mac, int scs);

fapi_nr_dl_config_request_t *get_dl_config_request(NR_UE_MAC_INST_t *mac, int slot);

fapi_nr_ul_config_request_pdu_t *lockGet_ul_config(NR_UE_MAC_INST_t *mac, frame_t frame_tx, int slot_tx, uint8_t pdu_type);
void remove_ul_config_last_item(fapi_nr_ul_config_request_pdu_t *pdu);
fapi_nr_ul_config_request_pdu_t *fapiLockIterator(fapi_nr_ul_config_request_t *ul_config, frame_t frame_tx, int slot_tx);

void release_ul_config(fapi_nr_ul_config_request_pdu_t *pdu, bool clearIt);
void clear_ul_config_request(NR_UE_MAC_INST_t *mac, int scs);
int16_t compute_nr_SSB_PL(NR_UE_MAC_INST_t *mac, short ssb_rsrp_dBm);

// PUSCH scheduler:
// - Calculate the slot in which ULSCH should be scheduled. This is current slot + K2,
// - where K2 is the offset between the slot in which UL DCI is received and the slot
// - in which ULSCH should be scheduled. K2 is configured in RRC configuration.  
// PUSCH Msg3 scheduler:
// - scheduled by RAR UL grant according to 8.3 of TS 38.213
int nr_ue_pusch_scheduler(const NR_UE_MAC_INST_t *mac,
                          const uint8_t is_Msg3,
                          const frame_t current_frame,
                          const int current_slot,
                          frame_t *frame_tx,
                          int *slot_tx,
                          const long k2);

int get_rnti_type(const NR_UE_MAC_INST_t *mac, const uint16_t rnti);

// Configuration of Msg3 PDU according to clauses:
// - 8.3 of 3GPP TS 38.213 version 16.3.0 Release 16
// - 6.1.2.2 of TS 38.214
// - 6.1.3 of TS 38.214
// - 6.2.2 of TS 38.214
// - 6.1.4.2 of TS 38.214
// - 6.4.1.1.1 of TS 38.211
// - 6.3.1.7 of 38.211
int nr_config_pusch_pdu(NR_UE_MAC_INST_t *mac,
                        NR_tda_info_t *tda_info,
                        nfapi_nr_ue_pusch_pdu_t *pusch_config_pdu,
                        dci_pdu_rel15_t *dci,
                        RAR_grant_t *rar_grant,
                        uint16_t rnti,
                        int ss_type,
                        const nr_dci_format_t dci_format);

int nr_rrc_mac_config_req_sl_preconfig(module_id_t module_id,
                                       NR_SL_PreconfigurationNR_r16_t *sl_preconfiguration,
                                       uint8_t sync_source);

void nr_rrc_mac_transmit_slss_req(module_id_t module_id,
                                  uint8_t *sl_mib_payload,
                                  uint16_t tx_slss_id,
                                  NR_SL_SSB_TimeAllocation_r16_t *ssb_ta);
void nr_rrc_mac_config_req_sl_mib(module_id_t module_id,
                                  NR_SL_SSB_TimeAllocation_r16_t *ssb_ta,
                                  uint16_t rx_slss_id,
                                  uint8_t *sl_mib);
void sl_prepare_psbch_payload(NR_TDD_UL_DL_ConfigCommon_t *TDD_UL_DL_Config,
                              uint8_t *bits_0_to_7, uint8_t *bits_8_to_11,
                              uint8_t mu, uint8_t L, uint8_t Y);

uint8_t sl_decode_sl_TDD_Config(NR_TDD_UL_DL_ConfigCommon_t *TDD_UL_DL_Config,
                                uint8_t bits_0_to_7, uint8_t bits_8_to_11,
                                uint8_t mu, uint8_t L, uint8_t Y);

uint8_t sl_determine_sci_1a_len(uint16_t *num_subchannels,
                                NR_SL_ResourcePool_r16_t *rpool,
                                sidelink_sci_format_1a_fields_t *sci_1a);
#endif
