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306 lines
8.8 KiB
C++
306 lines
8.8 KiB
C++
/**
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*
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* \section COPYRIGHT
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*
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* Copyright 2013-2015 Software Radio Systems Limited
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*
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* \section LICENSE
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*
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* This file is part of the srsUE library.
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*
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* srsUE 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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* srsUE 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 PARTICRXAR 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 "srslte/upper/rlc.h"
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#include "srslte/upper/rlc_tm.h"
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#include "srslte/upper/rlc_um.h"
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#include "srslte/upper/rlc_am.h"
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namespace srslte {
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rlc::rlc()
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{
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pool = byte_buffer_pool::get_instance();
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rlc_log = NULL;
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pdcp = NULL;
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rrc = NULL;
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mac_timers = NULL;
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ue = NULL;
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default_lcid = 0;
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bzero(metrics_time, sizeof(metrics_time));
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bzero(ul_tput_bytes, sizeof(ul_tput_bytes));
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bzero(dl_tput_bytes, sizeof(dl_tput_bytes));
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}
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void rlc::init(srsue::pdcp_interface_rlc *pdcp_,
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srsue::rrc_interface_rlc *rrc_,
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srsue::ue_interface *ue_,
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log *rlc_log_,
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mac_interface_timers *mac_timers_,
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uint32_t lcid_)
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{
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pdcp = pdcp_;
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rrc = rrc_;
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ue = ue_;
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rlc_log = rlc_log_;
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mac_timers = mac_timers_;
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default_lcid = lcid_;
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gettimeofday(&metrics_time[1], NULL);
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reset_metrics();
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rlc_array[0].init(RLC_MODE_TM, rlc_log, default_lcid, pdcp, rrc, mac_timers); // SRB0
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}
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void rlc::reset_metrics()
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{
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bzero(dl_tput_bytes, sizeof(long)*SRSLTE_N_RADIO_BEARERS);
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bzero(ul_tput_bytes, sizeof(long)*SRSLTE_N_RADIO_BEARERS);
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}
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void rlc::stop()
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{
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for(uint32_t i=0; i<SRSLTE_N_RADIO_BEARERS; i++) {
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if(rlc_array[i].active())
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rlc_array[i].stop();
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}
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}
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void rlc::get_metrics(rlc_metrics_t &m)
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{
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gettimeofday(&metrics_time[2], NULL);
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get_time_interval(metrics_time);
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double secs = (double)metrics_time[0].tv_sec + metrics_time[0].tv_usec*1e-6;
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m.dl_tput_mbps = 0;
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m.ul_tput_mbps = 0;
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for (int i=0;i<SRSLTE_N_RADIO_BEARERS;i++) {
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m.dl_tput_mbps += (dl_tput_bytes[i]*8/(double)1e6)/secs;
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m.ul_tput_mbps += (ul_tput_bytes[i]*8/(double)1e6)/secs;
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if(rlc_array[i].active()) {
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rlc_log->info("LCID=%d, RX throughput: %4.6f Mbps. TX throughput: %4.6f Mbps.\n",
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i,
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(dl_tput_bytes[i]*8/(double)1e6)/secs,
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(ul_tput_bytes[i]*8/(double)1e6)/secs);
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}
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}
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memcpy(&metrics_time[1], &metrics_time[2], sizeof(struct timeval));
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reset_metrics();
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}
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void rlc::reestablish() {
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for(uint32_t i=0; i<SRSLTE_N_RADIO_BEARERS; i++) {
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if(rlc_array[i].active()) {
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rlc_array[i].reestablish();
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}
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}
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}
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void rlc::reset()
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{
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for(uint32_t i=0; i<SRSLTE_N_RADIO_BEARERS; i++) {
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if(rlc_array[i].active())
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rlc_array[i].reset();
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}
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rlc_array[0].init(RLC_MODE_TM, rlc_log, default_lcid, pdcp, rrc, mac_timers); // SRB0
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}
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void rlc::empty_queue()
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{
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for(uint32_t i=0; i<SRSLTE_N_RADIO_BEARERS; i++) {
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if(rlc_array[i].active())
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rlc_array[i].empty_queue();
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}
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}
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/*******************************************************************************
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PDCP interface
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*******************************************************************************/
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void rlc::write_sdu(uint32_t lcid, byte_buffer_t *sdu)
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{
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if(valid_lcid(lcid)) {
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rlc_array[lcid].write_sdu(sdu);
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}
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}
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bool rlc::rb_is_um(uint32_t lcid) {
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return rlc_array[lcid].get_mode()==RLC_MODE_UM;
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}
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/*******************************************************************************
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MAC interface
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*******************************************************************************/
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uint32_t rlc::get_buffer_state(uint32_t lcid)
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{
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if(valid_lcid(lcid)) {
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return rlc_array[lcid].get_buffer_state();
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} else {
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return 0;
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}
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}
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uint32_t rlc::get_total_buffer_state(uint32_t lcid)
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{
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if(valid_lcid(lcid)) {
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return rlc_array[lcid].get_total_buffer_state();
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} else {
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return 0;
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}
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}
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int rlc::read_pdu(uint32_t lcid, uint8_t *payload, uint32_t nof_bytes)
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{
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if(valid_lcid(lcid)) {
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ul_tput_bytes[lcid] += nof_bytes;
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return rlc_array[lcid].read_pdu(payload, nof_bytes);
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}
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return 0;
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}
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void rlc::write_pdu(uint32_t lcid, uint8_t *payload, uint32_t nof_bytes)
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{
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if(valid_lcid(lcid)) {
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dl_tput_bytes[lcid] += nof_bytes;
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rlc_array[lcid].write_pdu(payload, nof_bytes);
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}
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}
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void rlc::write_pdu_bcch_bch(uint8_t *payload, uint32_t nof_bytes)
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{
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rlc_log->info_hex(payload, nof_bytes, "BCCH BCH message received.");
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dl_tput_bytes[0] += nof_bytes;
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byte_buffer_t *buf = pool_allocate;
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if (buf) {
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memcpy(buf->msg, payload, nof_bytes);
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buf->N_bytes = nof_bytes;
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buf->set_timestamp();
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pdcp->write_pdu_bcch_bch(buf);
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} else {
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rlc_log->error("Fatal error: Out of buffers from the pool in write_pdu_bcch_bch()\n");
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}
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}
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void rlc::write_pdu_bcch_dlsch(uint8_t *payload, uint32_t nof_bytes)
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{
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rlc_log->info_hex(payload, nof_bytes, "BCCH TXSCH message received.");
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dl_tput_bytes[0] += nof_bytes;
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byte_buffer_t *buf = pool_allocate;
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if (buf) {
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memcpy(buf->msg, payload, nof_bytes);
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buf->N_bytes = nof_bytes;
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buf->set_timestamp();
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pdcp->write_pdu_bcch_dlsch(buf);
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} else {
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rlc_log->error("Fatal error: Out of buffers from the pool in write_pdu_bcch_dlsch()\n");
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}
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}
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void rlc::write_pdu_pcch(uint8_t *payload, uint32_t nof_bytes)
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{
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rlc_log->info_hex(payload, nof_bytes, "PCCH message received.");
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dl_tput_bytes[0] += nof_bytes;
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byte_buffer_t *buf = pool_allocate;
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if (buf) {
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memcpy(buf->msg, payload, nof_bytes);
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buf->N_bytes = nof_bytes;
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buf->set_timestamp();
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pdcp->write_pdu_pcch(buf);
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} else {
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rlc_log->error("Fatal error: Out of buffers from the pool in write_pdu_pcch()\n");
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}
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}
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/*******************************************************************************
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RRC interface
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*******************************************************************************/
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void rlc::add_bearer(uint32_t lcid)
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{
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// No config provided - use defaults for SRB1 and SRB2
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if(lcid < 3) {
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if (!rlc_array[lcid].active()) {
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LIBLTE_RRC_RLC_CONFIG_STRUCT cnfg;
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cnfg.rlc_mode = LIBLTE_RRC_RLC_MODE_AM;
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cnfg.ul_am_rlc.t_poll_retx = LIBLTE_RRC_T_POLL_RETRANSMIT_MS45;
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cnfg.ul_am_rlc.poll_pdu = LIBLTE_RRC_POLL_PDU_INFINITY;
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cnfg.ul_am_rlc.poll_byte = LIBLTE_RRC_POLL_BYTE_INFINITY;
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cnfg.ul_am_rlc.max_retx_thresh = LIBLTE_RRC_MAX_RETX_THRESHOLD_T4;
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cnfg.dl_am_rlc.t_reordering = LIBLTE_RRC_T_REORDERING_MS35;
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cnfg.dl_am_rlc.t_status_prohibit = LIBLTE_RRC_T_STATUS_PROHIBIT_MS0;
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add_bearer(lcid, srslte_rlc_config_t(&cnfg));
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} else {
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rlc_log->warning("Bearer %s already configured. Reconfiguration not supported\n", rrc->get_rb_name(lcid).c_str());
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}
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}else{
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rlc_log->error("Radio bearer %s does not support default RLC configuration.\n", rrc->get_rb_name(lcid).c_str());
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}
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}
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void rlc::add_bearer(uint32_t lcid, srslte_rlc_config_t cnfg)
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{
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if(lcid >= SRSLTE_N_RADIO_BEARERS) {
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rlc_log->error("Radio bearer id must be in [0:%d] - %d\n", SRSLTE_N_RADIO_BEARERS, lcid);
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return;
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}
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if (!rlc_array[lcid].active()) {
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rlc_log->warning("Adding radio bearer %s with mode %s\n",
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rrc->get_rb_name(lcid).c_str(), liblte_rrc_rlc_mode_text[cnfg.rlc_mode]);
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switch(cnfg.rlc_mode)
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{
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case LIBLTE_RRC_RLC_MODE_AM:
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rlc_array[lcid].init(RLC_MODE_AM, rlc_log, lcid, pdcp, rrc, mac_timers);
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break;
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case LIBLTE_RRC_RLC_MODE_UM_BI:
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rlc_array[lcid].init(RLC_MODE_UM, rlc_log, lcid, pdcp, rrc, mac_timers);
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break;
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case LIBLTE_RRC_RLC_MODE_UM_UNI_DL:
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rlc_array[lcid].init(RLC_MODE_UM, rlc_log, lcid, pdcp, rrc, mac_timers);
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break;
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case LIBLTE_RRC_RLC_MODE_UM_UNI_UL:
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rlc_array[lcid].init(RLC_MODE_UM, rlc_log, lcid, pdcp, rrc, mac_timers);
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break;
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default:
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rlc_log->error("Cannot add RLC entity - invalid mode\n");
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return;
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}
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} else {
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rlc_log->warning("Bearer %s already created.\n", rrc->get_rb_name(lcid).c_str());
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}
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rlc_array[lcid].configure(cnfg);
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}
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/*******************************************************************************
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Helpers
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*******************************************************************************/
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bool rlc::valid_lcid(uint32_t lcid)
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{
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if(lcid >= SRSLTE_N_RADIO_BEARERS) {
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rlc_log->warning("Invalid LCID=%d\n", lcid);
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return false;
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} else if(!rlc_array[lcid].active()) {
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return false;
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}
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return true;
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}
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} // namespace srsue
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