/*
 * 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 rlc_am.h
* \brief This file, and only this file must be included by code that interact with RLC AM layer.
* \author GAUTHIER Lionel
* \date 2010-2011
* \version
* \note
* \bug
* \warning
*/
/** @defgroup _rlc_am_impl_ RLC AM Layer Reference Implementation
* @ingroup _rlc_impl_
* @{
*/

#    ifndef __RLC_AM_H__
#        define __RLC_AM_H__
#        include "platform_types.h"
#        include "rlc_def.h"
#        include "rlc_def_lte.h"
#        include "rlc_am_constants.h"
#        include "rlc_am_structs.h"
#        include "rlc_am_entity.h"
#        include "rlc_am_windows.h"
#        include "mem_block.h"
#        include "rlc_am_in_sdu.h"
#        include "rlc_am_segment.h"
#        include "rlc_am_segments_holes.h"
#        include "rlc_am_timer_poll_retransmit.h"
#        include "rlc_am_timer_reordering.h"
#        include "rlc_am_timer_status_prohibit.h"
#        include "rlc_am_retransmit.h"
#        include "rlc_am_receiver.h"
#        include "rlc_am_status_report.h"
#        include "rlc_am_rx_list.h"
#        include "rlc_am_reassembly.h"
#        include "rlc_am_init.h"
#        include "LTE_RLC-Config.h"
#        include "assertions.h"
//#        include "rlc_am_test.h"


#define PROTOCOL_RLC_AM_CTXT_FMT PROTOCOL_CTXT_FMT"[%s %02ld]"
#define PROTOCOL_RLC_AM_CTXT_ARGS(CTXT_Pp, rLC_Pp) PROTOCOL_CTXT_ARGS(CTXT_Pp),\
          (rLC_Pp->is_data_plane) ? "DRB AM" : "SRB AM",\
          rLC_Pp->rb_id

#define PROTOCOL_RLC_AM_MSC_FMT "[RNTI %" PRIx16 " %s %02ld]"
#define PROTOCOL_RLC_AM_MSC_ARGS(CTXT_Pp, rLC_Pp) \
        CTXT_Pp->rnti,\
          (rLC_Pp->is_data_plane) ? "DRB AM" : "SRB AM",\
          rLC_Pp->rb_id


#if defined(TRACE_RLC_MUTEX)
#define RLC_AM_MUTEX_LOCK(mUTEX, cTXT, rLC) \
	do {\
      int pmtl_rc = pthread_mutex_trylock(mUTEX);\
	  if (pmtl_rc != 0){\
        if (pmtl_rc == EBUSY) {\
          MSC_LOG_EVENT((cTXT->enb_flag == ENB_FLAG_YES) ? MSC_RLC_ENB:MSC_RLC_UE,\
                       "0 " PROTOCOL_RLC_AM_MSC_FMT " Warning try lock %s busy",\
                       PROTOCOL_RLC_AM_MSC_ARGS(cTXT,rLC),\
                       #mUTEX);\
          pthread_mutex_lock(mUTEX);\
        } else {\
            MSC_LOG_EVENT((cTXT->enb_flag == ENB_FLAG_YES) ? MSC_RLC_ENB:MSC_RLC_UE,\
                    "0 " PROTOCOL_RLC_AM_MSC_FMT " Error try lock %s %d",\
                    PROTOCOL_RLC_AM_MSC_ARGS(cTXT,rLC),\
                    #mUTEX, pmtl_rc);\
        }\
      }\
	} while (0);
#else
#define RLC_AM_MUTEX_LOCK(mUTEX, cTXT, rLC) pthread_mutex_lock(mUTEX)
#endif

#define RLC_AM_MUTEX_UNLOCK(mUTEX) pthread_mutex_unlock(mUTEX)

/*! \fn void     rlc_am_release (const protocol_ctxt_t* const ctxtP, rlc_am_entity_t * const rlc_pP)
* \brief    Empty function, TO DO.
* \param[in]  ctxt_pP          Running context.
* \param[in]  rlc_pP           RLC AM protocol instance pointer.
*/
void     rlc_am_release (
                const protocol_ctxt_t* const ctxtP,
                rlc_am_entity_t * const rlc_pP);

/** @addtogroup _rlc_am_init_impl_
* @{
*/

/*! \fn void config_req_rlc_am (const protocol_ctxt_t* const ctxtP, const srb_flag_t srb_flagP, rlc_am_info_t * config_amP, rb_id_t rb_idP, logical_chan_id_t chan_idP)
* \brief    Configure the UL and DL parameters of the RLC AM
* \param[in]  ctxt_pP                   Running context.
* \param[in]  srb_flagP                 Flag to indicate signalling radio bearer (1) or data radio bearer (0).
* \param[in]  config_amP                Configuration parameters for RLC AM instance.
* \param[in]  rb_idP                    Radio bearer identifier.
* \param[in]  chan_idP                  Transport channel identifier.
*/
void
config_req_rlc_am (
  const protocol_ctxt_t* const ctxt_pP,
  const srb_flag_t             srb_flagP,
  const rlc_am_info_t  *       config_am_pP,
  const rb_id_t                rb_idP,
  const logical_chan_id_t      chan_idP
);

/*! \fn void config_req_rlc_am_asn1 (const protocol_ctxt_t* const ctxtP, const srb_flag_t srb_flagP, struct RLC_Config__am * config_amP, rb_id_t rb_idP, logical_chan_id_t chan_idP)
* \brief    Configure the UL and DL parameters of the RLC AM with the asn1c autogenerated pameters structs
* \param[in]  ctxt_pP                   Running context.
* \param[in]  srb_flagP                 Flag to indicate signalling radio bearer (1) or data radio bearer (0).
* \param[in]  config_amP                Configuration parameters for RLC AM instance.
* \param[in]  rb_idP                    Radio bearer identifier.
* \param[in]  chan_idP                  Transport channel identifier.
*/
void config_req_rlc_am_asn1 (
                const protocol_ctxt_t* const ctxtP,
                const srb_flag_t srb_flagP,
                const struct LTE_RLC_Config__am * const config_amP,
                const rb_id_t rb_idP,
                const logical_chan_id_t chan_idP);

/** @} */

/*! \fn void     rlc_am_stat_req     (
                        const protocol_ctxt_t* const ctxtP,
                        rlc_am_entity_t * const rlc_pP,
                        unsigned int* stat_tx_pdcp_sdu,
                        unsigned int* stat_tx_pdcp_bytes,
                        unsigned int* stat_tx_pdcp_sdu_discarded,
                        unsigned int* stat_tx_pdcp_bytes_discarded,
                        unsigned int* stat_tx_data_pdu,
                        unsigned int* stat_tx_data_bytes,
                        unsigned int* stat_tx_retransmit_pdu_by_status,
                        unsigned int* stat_tx_retransmit_bytes_by_status,
                        unsigned int* stat_tx_retransmit_pdu,
                        unsigned int* stat_tx_retransmit_bytes,
                        unsigned int* stat_tx_control_pdu,
                        unsigned int* stat_tx_control_bytes,
                        unsigned int* stat_rx_pdcp_sdu,
                        unsigned int* stat_rx_pdcp_bytes,
                        unsigned int* stat_rx_data_pdus_duplicate,
                        unsigned int* stat_rx_data_bytes_duplicate,
                        unsigned int* stat_rx_data_pdu,
                        unsigned int* stat_rx_data_bytes,
                        unsigned int* stat_rx_data_pdu_dropped,
                        unsigned int* stat_rx_data_bytes_dropped,
                        unsigned int* stat_rx_data_pdu_out_of_window,
                        unsigned int* stat_rx_data_bytes_out_of_window,
                        unsigned int* stat_rx_control_pdu,
                        unsigned int* stat_rx_control_bytes,
                        unsigned int* stat_timer_reordering_timed_out,
                        unsigned int* stat_timer_poll_retransmit_timed_out,
                        unsigned int* stat_timer_status_prohibit_timed_out)
* \brief    Request TX and RX statistics of a RLC AM protocol instance.
* \param[in]  ctxt_pP          Running context.
* \param[in]  rlc_pP           RLC AM protocol instance pointer.
* \param[out] stat_tx_pdcp_sdu                     Number of SDUs coming from upper layers.
* \param[out] stat_tx_pdcp_bytes                   Number of bytes coming from upper layers.
* \param[out] stat_tx_pdcp_sdu_discarded           Number of discarded SDUs coming from upper layers.
* \param[out] stat_tx_pdcp_bytes_discarded         Number of discarded bytes coming from upper layers.
* \param[out] stat_tx_data_pdu                     Number of transmitted data PDUs to lower layers.
* \param[out] stat_tx_data_bytes                   Number of transmitted data bytes to lower layers.
* \param[out] stat_tx_retransmit_pdu_by_status     Number of re-transmitted data PDUs due to status reception.
* \param[out] stat_tx_retransmit_bytes_by_status   Number of re-transmitted data bytes due to status reception.
* \param[out] stat_tx_retransmit_pdu               Number of re-transmitted data PDUs to lower layers.
* \param[out] stat_tx_retransmit_bytes             Number of re-transmitted data bytes to lower layers.
* \param[out] stat_tx_control_pdu                  Number of transmitted control PDUs to lower layers.
* \param[out] stat_tx_control_bytes                Number of transmitted control bytes to lower layers.
* \param[out] stat_rx_pdcp_sdu                     Number of SDUs delivered to upper layers.
* \param[out] stat_rx_pdcp_bytes                   Number of bytes delivered to upper layers.
* \param[out] stat_rx_data_pdus_duplicate          Number of duplicate PDUs received.
* \param[out] stat_rx_data_bytes_duplicate         Number of duplicate bytes received.
* \param[out] stat_rx_data_pdu                     Number of received PDUs from lower layers.
* \param[out] stat_rx_data_bytes                   Number of received bytes from lower layers.
* \param[out] stat_rx_data_pdu_dropped             Number of received PDUs from lower layers, then dropped.
* \param[out] stat_rx_data_bytes_dropped           Number of received bytes from lower layers, then dropped.
* \param[out] stat_rx_data_pdu_out_of_window       Number of data PDUs received out of the receive window.
* \param[out] stat_rx_data_bytes_out_of_window     Number of data bytes received out of the receive window.
* \param[out] stat_rx_control_pdu                  Number of control PDUs received.
* \param[out] stat_rx_control_bytes                Number of control bytes received.
* \param[out] stat_timer_reordering_timed_out      Number of times the timer "reordering" has timed-out.
* \param[out] stat_timer_poll_retransmit_timed_out Number of times the timer "poll_retransmit" has timed-out.
* \param[out] stat_timer_status_prohibit_timed_out Number of times the timer "status_prohibit" has timed-out.
*/
void     rlc_am_stat_req     (
                const protocol_ctxt_t* const ctxtP,
                rlc_am_entity_t * const rlc_pP,
                unsigned int* stat_tx_pdcp_sdu,
                unsigned int* stat_tx_pdcp_bytes,
                unsigned int* stat_tx_pdcp_sdu_discarded,
                unsigned int* stat_tx_pdcp_bytes_discarded,
                unsigned int* stat_tx_data_pdu,
                unsigned int* stat_tx_data_bytes,
                unsigned int* stat_tx_retransmit_pdu_by_status,
                unsigned int* stat_tx_retransmit_bytes_by_status,
                unsigned int* stat_tx_retransmit_pdu,
                unsigned int* stat_tx_retransmit_bytes,
                unsigned int* stat_tx_control_pdu,
                unsigned int* stat_tx_control_bytes,
                unsigned int* stat_rx_pdcp_sdu,
                unsigned int* stat_rx_pdcp_bytes,
                unsigned int* stat_rx_data_pdus_duplicate,
                unsigned int* stat_rx_data_bytes_duplicate,
                unsigned int* stat_rx_data_pdu,
                unsigned int* stat_rx_data_bytes,
                unsigned int* stat_rx_data_pdu_dropped,
                unsigned int* stat_rx_data_bytes_dropped,
                unsigned int* stat_rx_data_pdu_out_of_window,
                unsigned int* stat_rx_data_bytes_out_of_window,
                unsigned int* stat_rx_control_pdu,
                unsigned int* stat_rx_control_bytes,
                unsigned int* stat_timer_reordering_timed_out,
                unsigned int* stat_timer_poll_retransmit_timed_out,
                unsigned int* stat_timer_status_prohibit_timed_out);

/*! \fn void     rlc_am_get_pdus (const protocol_ctxt_t* const ctxtP, void * const rlc_pP)
* \brief    Request the segmentation of SDUs based on status previously sent by MAC.
* \param[in]  ctxt_pP          Running context.
* \param[in]  rlc_pP           RLC AM protocol instance pointer.
*/
void
rlc_am_get_pdus (
  const protocol_ctxt_t* const ctxt_pP,
  rlc_am_entity_t * const      rlc_pP
);

/*! \fn void rlc_am_rx (const protocol_ctxt_t* const ctxtP,void * const rlc_pP, struct mac_data_ind data_indication)
* \brief    Process the received PDUs from lower layer.
* \param[in]  ctxt_pP          Running context.
* \param[in]  rlc_pP           RLC AM protocol instance pointer.
* \param[in]  data_indication           PDUs from MAC.
*/
void     rlc_am_rx (const protocol_ctxt_t* const ctxtP,void * const rlc_pP, struct mac_data_ind);

/*! \fn struct mac_status_resp rlc_am_mac_status_indication (const protocol_ctxt_t* const ctxtP,void * const rlc_pP, uint16_t tbs_sizeP, struct mac_status_ind tx_statusP,const eNB_flag_t enb_flagP)
* \brief    Request the maximum number of bytes that can be served by RLC instance to MAC and fix the amount of bytes requested by MAC for next RLC transmission.
* \param[in]  ctxt_pP          Running context.
* \param[in]  rlc_pP           RLC AM protocol instance pointer.
* \param[in]  tbs_sizeP                 Number of bytes requested by MAC for next transmission.
* \param[in]  tx_statusP                Transmission status given by MAC on previous MAC transmission of the PDU.
* \param[in]  enb_flagP        eNB or UE flag indication.
* \return     The maximum number of bytes that can be served by RLC instance to MAC.
*/
struct mac_status_resp rlc_am_mac_status_indication (const protocol_ctxt_t* const ctxtP, void * const rlc_pP, uint16_t tbs_sizeP, struct mac_status_ind tx_statusP,const eNB_flag_t enb_flagP);

/*! \fn void rlc_am_set_nb_bytes_requested_by_mac (void * const            rlc_pP,const tb_size_t         tb_sizeP)
* \brief    Set available TBS for RLC Tx just before am_mac_data_request. Used for UE only.
* \param[in]  rlc_pP           RLC AM protocol instance pointer.
* \param[in]  tb_sizeP         Available Tx Transport Block size in bytes.
*/
void rlc_am_set_nb_bytes_requested_by_mac (void * const            rlc_pP,const tb_size_t         tb_sizeP);

/*! \fn struct mac_data_req rlc_am_mac_data_request (const protocol_ctxt_t* const ctxtP,void * const rlc_pP,const eNB_flag_t   enb_flagP)
* \brief    Gives PDUs to lower layer MAC.
* \param[in]  ctxt_pP          Running context.
* \param[in]  rlc_pP           RLC AM protocol instance pointer.
* \param[in]  enb_flagP        eNB or UE flag
* \return     A PDU of the previously requested number of bytes, and the updated maximum number of bytes that can be served by RLC instance to MAC for next RLC transmission.
*/
struct mac_data_req rlc_am_mac_data_request (const protocol_ctxt_t* const ctxtP,void * const rlc_pP,const eNB_flag_t  enb_flagP);

/*! \fn void     rlc_am_mac_data_indication (const protocol_ctxt_t* const ctxtP,void * const rlc_pP, struct mac_data_ind data_indP)
* \brief    Receive PDUs from lower layer MAC.
* \param[in]  ctxt_pP          Running context.
* \param[in]  rlc_pP           RLC AM protocol instance pointer.
* \param[in]  data_indP        PDUs from MAC.
*/
void     rlc_am_mac_data_indication (const protocol_ctxt_t* const ctxtP,void * const rlc_pP, struct mac_data_ind data_indP);

/*! \fn uint32_t rlc_am_get_buffer_occupancy_in_bytes (const protocol_ctxt_t* const ctxt_pP, rlc_am_entity_t * const      rlc_pP)
* \brief   Get Tx Buffer Occupancy.
* \param[in]  ctxt_pP          Running context.
* \param[in]  rlc_pP           RLC AM protocol instance pointer.
*/
uint32_t rlc_am_get_buffer_occupancy_in_bytes (const protocol_ctxt_t* const ctxt_pP, rlc_am_entity_t * const      rlc_pP);

/*! \fn void     rlc_am_data_req (const protocol_ctxt_t* const ctxtP,void * const rlc_pP, mem_block_t *sduP)
* \brief    Interface with higher layers, buffer higher layer SDUS for transmission.
* \param[in]  ctxt_pP          Running context.
* \param[in]  rlc_pP           RLC AM protocol instance pointer.
* \param[in]  sduP             SDU. (A struct rlc_am_data_req is mapped on sduP->data.)
*/
void     rlc_am_data_req (const protocol_ctxt_t* const ctxtP,void * const rlc_pP, mem_block_t *sduP);
/** @} */
#    endif
