244 lines
6.8 KiB
C++
244 lines
6.8 KiB
C++
/*
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* Copyright 2013-2019 Software Radio Systems Limited
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*
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* This file is part of srsLTE.
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*
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* srsLTE is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as
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* published by the Free Software Foundation, either version 3 of
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* the License, or (at your option) any later version.
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*
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* srsLTE is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* A copy of the GNU Affero General Public License can be found in
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* the LICENSE file in the top-level directory of this distribution
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* and at http://www.gnu.org/licenses/.
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*
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*/
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#include "srsenb/hdr/upper/rlc.h"
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#include "srsenb/hdr/upper/common_enb.h"
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namespace srsenb {
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void rlc::init(pdcp_interface_rlc* pdcp_, rrc_interface_rlc* rrc_, mac_interface_rlc *mac_,
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srslte::mac_interface_timers *mac_timers_, srslte::log* log_h_)
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{
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pdcp = pdcp_;
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rrc = rrc_,
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log_h = log_h_;
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mac = mac_;
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mac_timers = mac_timers_;
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pool = srslte::byte_buffer_pool::get_instance();
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pthread_rwlock_init(&rwlock, NULL);
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}
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void rlc::stop()
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{
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pthread_rwlock_wrlock(&rwlock);
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for(std::map<uint32_t, user_interface>::iterator iter=users.begin(); iter!=users.end(); ++iter) {
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clear_user(&iter->second);
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}
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users.clear();
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pthread_rwlock_unlock(&rwlock);
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pthread_rwlock_destroy(&rwlock);
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}
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void rlc::add_user(uint16_t rnti)
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{
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pthread_rwlock_rdlock(&rwlock);
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if (users.count(rnti) == 0) {
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srslte::rlc *obj = new srslte::rlc;
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obj->init(&users[rnti], &users[rnti], &users[rnti], log_h, mac_timers, RB_ID_SRB0);
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users[rnti].rnti = rnti;
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users[rnti].pdcp = pdcp;
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users[rnti].rrc = rrc;
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users[rnti].rlc = obj;
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users[rnti].parent = this;
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}
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pthread_rwlock_unlock(&rwlock);
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}
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// Private unlocked deallocation of user
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void rlc::clear_user(user_interface *ue)
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{
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ue->rlc->stop();
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delete ue->rlc;
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ue->rlc = NULL;
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}
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void rlc::rem_user(uint16_t rnti)
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{
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pthread_rwlock_wrlock(&rwlock);
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if (users.count(rnti)) {
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clear_user(&users[rnti]);
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users.erase(rnti);
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} else {
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log_h->error("Removing rnti=0x%x. Already removed\n", rnti);
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}
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pthread_rwlock_unlock(&rwlock);
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}
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void rlc::clear_buffer(uint16_t rnti)
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{
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pthread_rwlock_rdlock(&rwlock);
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if (users.count(rnti)) {
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users[rnti].rlc->empty_queue();
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for (int i=0;i<SRSLTE_N_RADIO_BEARERS;i++) {
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mac->rlc_buffer_state(rnti, i, 0, 0);
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}
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log_h->info("Cleared buffer rnti=0x%x\n", rnti);
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}
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pthread_rwlock_unlock(&rwlock);
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}
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void rlc::add_bearer(uint16_t rnti, uint32_t lcid)
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{
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pthread_rwlock_rdlock(&rwlock);
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if (users.count(rnti)) {
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users[rnti].rlc->add_bearer(lcid);
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}
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pthread_rwlock_unlock(&rwlock);
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}
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void rlc::add_bearer(uint16_t rnti, uint32_t lcid, srslte::srslte_rlc_config_t cnfg)
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{
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pthread_rwlock_rdlock(&rwlock);
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if (users.count(rnti)) {
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users[rnti].rlc->add_bearer(lcid, cnfg);
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}
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pthread_rwlock_unlock(&rwlock);
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}
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void rlc::add_bearer_mrb(uint16_t rnti, uint32_t lcid)
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{
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pthread_rwlock_rdlock(&rwlock);
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if (users.count(rnti)) {
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users[rnti].rlc->add_bearer_mrb(lcid);
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}
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pthread_rwlock_unlock(&rwlock);
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}
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void rlc::read_pdu_pcch(uint8_t* payload, uint32_t buffer_size)
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{
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rrc->read_pdu_pcch(payload, buffer_size);
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}
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int rlc::read_pdu(uint16_t rnti, uint32_t lcid, uint8_t* payload, uint32_t nof_bytes)
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{
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int ret;
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uint32_t tx_queue;
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pthread_rwlock_rdlock(&rwlock);
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if(users.count(rnti)) {
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if(rnti != SRSLTE_MRNTI) {
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ret = users[rnti].rlc->read_pdu(lcid, payload, nof_bytes);
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tx_queue = users[rnti].rlc->get_buffer_state(lcid);
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} else {
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ret = users[rnti].rlc->read_pdu_mch(lcid, payload, nof_bytes);
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tx_queue = users[rnti].rlc->get_total_mch_buffer_state(lcid);
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}
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// In the eNodeB, there is no polling for buffer state from the scheduler, thus
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// communicate buffer state every time a PDU is read
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uint32_t retx_queue = 0;
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log_h->debug("Buffer state PDCP: rnti=0x%x, lcid=%d, tx_queue=%d\n", rnti, lcid, tx_queue);
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mac->rlc_buffer_state(rnti, lcid, tx_queue, retx_queue);
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}else{
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ret = SRSLTE_ERROR;
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}
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pthread_rwlock_unlock(&rwlock);
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return ret;
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}
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void rlc::write_pdu(uint16_t rnti, uint32_t lcid, uint8_t* payload, uint32_t nof_bytes)
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{
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pthread_rwlock_rdlock(&rwlock);
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if (users.count(rnti)) {
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users[rnti].rlc->write_pdu(lcid, payload, nof_bytes);
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// In the eNodeB, there is no polling for buffer state from the scheduler, thus
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// communicate buffer state every time a new PDU is written
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uint32_t tx_queue = users[rnti].rlc->get_buffer_state(lcid);
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uint32_t retx_queue = 0;
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log_h->debug("Buffer state PDCP: rnti=0x%x, lcid=%d, tx_queue=%d\n", rnti, lcid, tx_queue);
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mac->rlc_buffer_state(rnti, lcid, tx_queue, retx_queue);
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}
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pthread_rwlock_unlock(&rwlock);
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}
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void rlc::read_pdu_bcch_dlsch(uint32_t sib_index, uint8_t *payload)
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{
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// RLC is transparent for BCCH
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rrc->read_pdu_bcch_dlsch(sib_index, payload);
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}
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void rlc::write_sdu(uint16_t rnti, uint32_t lcid, srslte::unique_byte_buffer sdu)
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{
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uint32_t tx_queue;
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pthread_rwlock_rdlock(&rwlock);
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if (users.count(rnti)) {
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if(rnti != SRSLTE_MRNTI){
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users[rnti].rlc->write_sdu(lcid, std::move(sdu), false);
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tx_queue = users[rnti].rlc->get_buffer_state(lcid);
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}else {
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users[rnti].rlc->write_sdu_mch(lcid, std::move(sdu));
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tx_queue = users[rnti].rlc->get_total_mch_buffer_state(lcid);
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}
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// In the eNodeB, there is no polling for buffer state from the scheduler, thus
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// communicate buffer state every time a new SDU is written
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uint32_t retx_queue = 0;
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mac->rlc_buffer_state(rnti, lcid, tx_queue, retx_queue);
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log_h->info("Buffer state: rnti=0x%x, lcid=%d, tx_queue=%d\n", rnti, lcid, tx_queue);
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}
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pthread_rwlock_unlock(&rwlock);
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}
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bool rlc::rb_is_um(uint16_t rnti, uint32_t lcid) {
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bool ret = false;
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pthread_rwlock_rdlock(&rwlock);
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if (users.count(rnti)) {
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ret = users[rnti].rlc->rb_is_um(lcid);
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}
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pthread_rwlock_unlock(&rwlock);
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return ret;
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}
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void rlc::user_interface::max_retx_attempted()
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{
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rrc->max_retx_attempted(rnti);
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}
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void rlc::user_interface::write_pdu(uint32_t lcid, srslte::unique_byte_buffer sdu)
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{
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pdcp->write_pdu(rnti, lcid, std::move(sdu));
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}
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void rlc::user_interface::write_pdu_bcch_bch(srslte::unique_byte_buffer sdu)
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{
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ERROR("Error: Received BCCH from ue=%d\n", rnti);
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}
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void rlc::user_interface::write_pdu_bcch_dlsch(srslte::unique_byte_buffer sdu)
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{
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ERROR("Error: Received BCCH from ue=%d\n", rnti);
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}
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void rlc::user_interface::write_pdu_pcch(srslte::unique_byte_buffer sdu)
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{
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ERROR("Error: Received PCCH from ue=%d\n", rnti);
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}
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std::string rlc::user_interface::get_rb_name(uint32_t lcid)
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{
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return std::string(rb_id_text[lcid]);
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}
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}
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