/*******************************************************************************
OpenAirInterface
Copyright(c) 1999 - 2014 Eurecom
OpenAirInterface is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
OpenAirInterface 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with OpenAirInterface.The full GNU General Public License is
included in this distribution in the file called "COPYING". If not,
see <http://www.gnu.org/licenses/>.
Contact Information
OpenAirInterface Admin: openair_admin@eurecom.fr
OpenAirInterface Tech : openair_tech@eurecom.fr
OpenAirInterface Dev : openair4g-devel@lists.eurecom.fr
Address : Eurecom, Campus SophiaTech, 450 Route des Chappes, CS 50193 - 06904 Biot Sophia Antipolis cedex, FRANCE
*******************************************************************************/
/*! \file eNB_transport_IQ.c
* \brief eNB transport IQ samples
* \author Katerina Trilyraki, Navid Nikaein, Raymond Knopp
* \date 2015
* \version 0.1
* \company Eurecom
* \maintainer: navid.nikaein@eurecom.fr
* \note
* \warning very experimental
*/
#include <unistd.h>
#include <time.h>
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <signal.h>
#include "common_lib.h"
#include "PHY/defs.h"
#include "rrh_gw.h"
#include "rrh_gw_externs.h"
#include "rt_wrapper.h"
#define PRINTF_PERIOD 3750
#define HEADER_SIZE ((sizeof(int32_t) + sizeof(openair0_timestamp))>>2)
pthread_cond_t sync_eNB_cond[4];
pthread_mutex_t sync_eNB_mutex[4];
pthread_mutex_t sync_trx_mutex=PTHREAD_MUTEX_INITIALIZER;
pthread_cond_t sync_trx_cond=PTHREAD_COND_INITIALIZER;
openair0_timestamp nrt_eNB_counter[4]= {0,0,0,0};
int32_t overflow_rx_buffer_eNB[4]= {0,0,0,0};
int32_t nsamps_eNB[4]= {0,0,0,0};
int32_t eNB_tx_started=0,eNB_rx_started=0;
int32_t counter_eNB_rx[4]= {0,0,0,0};
int32_t counter_eNB_tx[4]= {0,0,0,0};
uint8_t RT_flag_eNB,NRT_flag_eNB;
void *rrh_eNB_thread_status;
int sync_eNB_rx[4]= {-1,-1,-1,-1};
unsigned int sync_trx=0;
int32_t **tx_buffer_eNB;
int32_t **rx_buffer_eNB;
void **rx_eNB; //was fixed to 2 ant
void **tx_eNB; //was fixed to 2 ant
openair0_timestamp timestamp_eNB_tx[4]= {0,0,0,0};// all antennas must have the same ts
openair0_timestamp timestamp_eNB_rx[4]= {0,0,0,0};
openair0_timestamp timestamp_rx=0,timestamp_tx=0;
unsigned int rx_pos=0, next_rx_pos=0;
unsigned int tx_pos=0, tx_pos_rf=0, prev_tx_pos=0;
unsigned int rt_period=0;
struct itimerspec timerspec;
pthread_mutex_t timer_mutex;
/*! \fn void *rrh_eNB_rx_thread(void *arg)
* \brief this function
* \param[in]
* \return none
* \note
* @ingroup _oai
*/
void *rrh_eNB_rx_thread(void *);
/*! \fn void *rrh_eNB_tx_thread(void *arg)
* \brief this function
* \param[in]
* \return none
* \note
* @ingroup _oai
*/
void *rrh_eNB_tx_thread(void *);
/*! \fn void *rrh_eNB_thread(void *arg)
* \brief this function
* \param[in]
* \return none
* \note
* @ingroup _oai
*/
void *rrh_eNB_thread(void *);
/*! \fn void check_dev_config( rrh_module_t *mod_enb)
* \brief this function
* \param[in] *mod_enb
* \return none
* \note
* @ingroup _oai
*/
static void check_dev_config( rrh_module_t *mod_enb);
/*! \fn void calc_rt_period_ns( openair0_config_t openair0_cfg)
* \brief this function
* \param[in] openair0_cfg
* \return none
* \note
* @ingroup _oai
*/
static void calc_rt_period_ns( openair0_config_t *openair0_cfg);
void config_BBU_mod( rrh_module_t *mod_enb, uint8_t RT_flag, uint8_t NRT_flag) {
int error_code_eNB;
pthread_t main_rrh_eNB_thread;
pthread_attr_t attr;
struct sched_param sched_param_rrh;
RT_flag_eNB=RT_flag;
NRT_flag_eNB=NRT_flag;
/* init socket and have handshake-like msg with client to exchange parameters */
mod_enb->eth_dev.trx_start_func(&mod_enb->eth_dev);//change port make it plus_id
mod_enb->devs->openair0_cfg = mod_enb->eth_dev.openair0_cfg;
/* check sanity of configuration parameters and print */
check_dev_config(mod_enb);
if (rf_config_file[0] == '\0')
mod_enb->devs->openair0_cfg->configFilename = NULL;
else
mod_enb->devs->openair0_cfg->configFilename = rf_config_file;
/* initialize and configure the RF device */
if (openair0_device_load(mod_enb->devs, mod_enb->devs->openair0_cfg)<0) {
LOG_E(RRH,"Exiting, cannot initialize RF device.\n");
exit(-1);
} else {
if (mod_enb->devs->type != NONE_DEV) {
/* start RF device */
if (mod_enb->devs->type == EXMIMO_DEV) {
//call start function for exmino
} else {
if (mod_enb->devs->trx_start_func(mod_enb->devs)!=0)
LOG_E(RRH,"Unable to initiate RF device.\n");
else
LOG_I(RRH,"RF device has been initiated.\n");
}
}
}
/* create main eNB module thread
main_rrh_eNB_thread allocates memory
for TX/RX buffers and creates TX/RX
threads for every eNB module */
pthread_attr_init(&attr);
sched_param_rrh.sched_priority = sched_get_priority_max(SCHED_FIFO);
pthread_attr_setschedparam(&attr,&sched_param_rrh);
pthread_attr_setschedpolicy(&attr,SCHED_FIFO);
error_code_eNB = pthread_create(&main_rrh_eNB_thread, &attr, rrh_eNB_thread, (void *)mod_enb);
if (error_code_eNB) {
LOG_E(RRH,"Error while creating eNB thread\n");
exit(-1);
}
}
void *rrh_eNB_thread(void *arg) {
rrh_module_t *dev=(rrh_module_t *)arg;
pthread_t eNB_rx_thread, eNB_tx_thread;
int error_code_eNB_rx, error_code_eNB_tx;
int32_t i,j;
void *tmp;
unsigned int samples_per_frame=0;
samples_per_frame = dev->eth_dev.openair0_cfg->samples_per_frame;
while (rrh_exit==0) {
VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME( VCD_SIGNAL_DUMPER_FUNCTIONS_eNB_TRX, 1 );
/* calculate packet period */
calc_rt_period_ns(dev->eth_dev.openair0_cfg);
/* allocate memory for TX/RX buffers
each antenna port has a TX and a RX buffer
each TX and RX buffer is of (samples_per_frame + HEADER_SIZE) samples (size of samples is 4 bytes) */
rx_buffer_eNB = (int32_t**)malloc16(dev->eth_dev.openair0_cfg->rx_num_channels*sizeof(int32_t*));
tx_buffer_eNB = (int32_t**)malloc16(dev->eth_dev.openair0_cfg->tx_num_channels*sizeof(int32_t*));
LOG_D(RRH,"rx_buffer_eNB address =%p tx_buffer_eNB address =%p \n",rx_buffer_eNB,tx_buffer_eNB);
/* rx_buffer_eNB points to the beginning of data */
for (i=0; i<dev->eth_dev.openair0_cfg->rx_num_channels; i++) {
tmp=(void *)malloc16(sizeof(int32_t)*(samples_per_frame + 32));
memset(tmp,0,sizeof(int32_t)*(samples_per_frame + 32));
rx_buffer_eNB[i]=( tmp + (32*sizeof(int32_t)) );
LOG_D(RRH,"i=%d rx_buffer_eNB[i]=%p tmp= %p\n",i,rx_buffer_eNB[i],tmp);
}
/* tx_buffer_eNB points to the beginning of data */
for (i=0; i<dev->eth_dev.openair0_cfg->tx_num_channels; i++) {
tmp=(void *)malloc16(sizeof(int32_t)*(samples_per_frame + 32));
memset(tmp,0,sizeof(int32_t)*(samples_per_frame + 32));
tx_buffer_eNB[i]=( tmp + (32*sizeof(int32_t)) );
LOG_D(RRH,"i= %d tx_buffer_eNB[i]=%p tmp= %p \n",i,tx_buffer_eNB[i],tmp);
}
/* dummy initialization for TX/RX buffers */
for (i=0; i<dev->eth_dev.openair0_cfg->rx_num_channels; i++) {
for (j=0; j<samples_per_frame; j++) {
rx_buffer_eNB[i][j]=32+i;
}
}
/* dummy initialization for TX/RX buffers */
for (i=0; i<dev->eth_dev.openair0_cfg->tx_num_channels; i++) {
for (j=0; j<samples_per_frame; j++) {
tx_buffer_eNB[i][j]=12+i;
}
}
/* allocate TX/RX buffers pointers used in write/read operations */
rx_eNB = (void**)malloc16(dev->eth_dev.openair0_cfg->rx_num_channels*sizeof(int32_t*));
tx_eNB = (void**)malloc16(dev->eth_dev.openair0_cfg->tx_num_channels*sizeof(int32_t*));
/* init mutexes */
for (i=0; i<dev->eth_dev.openair0_cfg->tx_num_channels; i++) {
pthread_mutex_init(&sync_eNB_mutex[i],NULL);
pthread_cond_init(&sync_eNB_cond[i],NULL);
}
/* init mutexes */
pthread_mutex_init(&sync_trx_mutex,NULL);
/* create eNB module's TX/RX threads */
#ifdef LOWLATENCY
error_code_eNB_rx = pthread_create(&eNB_rx_thread, NULL, rrh_eNB_rx_thread, (void *)dev);
error_code_eNB_tx = pthread_create(&eNB_tx_thread, NULL, rrh_eNB_tx_thread, (void *)dev);
LOG_I(RRH,"[eNB][SCHED] deadline scheduling applied to eNB TX/RX threads\n");
#else
pthread_attr_t attr_eNB_rx, attr_eNB_tx;
struct sched_param sched_param_eNB_rx, sched_param_eNB_tx;
pthread_attr_init(&attr_eNB_rx);
pthread_attr_init(&attr_eNB_tx);
sched_param_eNB_rx.sched_priority = sched_get_priority_max(SCHED_FIFO);
sched_param_eNB_tx.sched_priority = sched_get_priority_max(SCHED_FIFO);
pthread_attr_setschedparam(&attr_eNB_rx,&sched_param_eNB_rx);
pthread_attr_setschedparam(&attr_eNB_tx,&sched_param_eNB_tx);
pthread_attr_setschedpolicy(&attr_eNB_rx,SCHED_FIFO);
pthread_attr_setschedpolicy(&attr_eNB_tx,SCHED_FIFO);
error_code_eNB_rx = pthread_create(&eNB_rx_thread, &attr_eNB_rx, rrh_eNB_rx_thread, (void *)dev);
error_code_eNB_tx = pthread_create(&eNB_tx_thread, &attr_eNB_tx, rrh_eNB_tx_thread, (void *)dev);
LOG_I(RRH,"[eNB][SCHED] FIFO scheduling applied to eNB TX/RX threads\n");
#endif
if (error_code_eNB_rx) {
LOG_E(RRH,"[eNB] Error while creating eNB RX thread\n");
exit(-1);
}
if (error_code_eNB_tx) {
LOG_E(RRH,"[eNB] Error while creating eNB TX thread\n");
exit(-1);
}
/* create timer thread; when no RF device is present a software clock is generated */
if (dev->devs->type == NONE_DEV) {
int error_code_timer;
pthread_t main_timer_proc_thread;
LOG_I(RRH,"Creating timer thread with rt period %d ns.\n",rt_period);
/* setup the timer to generate an interrupt:
-for the first time in (sample_per_packet/sample_rate) ns
-and then every (sample_per_packet/sample_rate) ns */
timerspec.it_value.tv_sec = rt_period/1000000000;
timerspec.it_value.tv_nsec = rt_period%1000000000;
timerspec.it_interval.tv_sec = rt_period/1000000000;
timerspec.it_interval.tv_nsec = rt_period%1000000000;
#ifdef LOWLATENCY
error_code_timer = pthread_create(&main_timer_proc_thread, NULL, timer_proc, (void *)&timerspec);
LOG_I(RRH,"[eNB][SCHED] deadline scheduling applied to timer thread \n");
#else
pthread_attr_t attr_timer;
struct sched_param sched_param_timer;
pthread_attr_init(&attr_timer);
sched_param_timer.sched_priority = sched_get_priority_max(SCHED_FIFO-1);
pthread_attr_setschedparam(&attr_timer,&sched_param_timer);
pthread_attr_setschedpolicy(&attr_timer,SCHED_FIFO-1);
pthread_mutex_init(&timer_mutex,NULL);
error_code_timer = pthread_create(&main_timer_proc_thread, &attr_timer, timer_proc, (void *)&timerspec);
LOG_I(RRH,"[eNB][SCHED] FIFO scheduling applied to timer thread \n");
#endif
if (error_code_timer) {
LOG_E(RRH,"Error while creating timer proc thread\n");
exit(-1);
}
}
while (rrh_exit==0)
sleep(1);
VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME( VCD_SIGNAL_DUMPER_FUNCTIONS_eNB_TRX,0 );
}
rrh_eNB_thread_status = 0;
pthread_exit(&rrh_eNB_thread_status);
return(0);
}
/* Receive from RF and transmit to RRH */
void *rrh_eNB_rx_thread(void *arg) {
/* measurement related vars */
struct timespec time0,time1,time2;
unsigned long long max_rx_time=0, min_rx_time=rt_period, total_rx_time=0, average_rx_time=rt_period, s_period=0, trial=0;
int trace_cnt=0;
struct timespec time_req_1us, time_rem_1us;
rrh_module_t *dev = (rrh_module_t *)arg;
ssize_t bytes_sent;
int i=0 ,pck_rx=0, s_cnt=0;
openair0_timestamp last_hw_counter=0; //volatile int64_t
unsigned int samples_per_frame=0,samples_per_subframe=0, spp_rf=0, spp_eth=0;
uint8_t loopback=0,measurements=0;
unsigned int subframe=0;
unsigned int frame=0;
time_req_1us.tv_sec = 0;
time_req_1us.tv_nsec =1000; //time_req_1us.tv_nsec = (int)rt_period/2;--->granularity issue
spp_eth = dev->eth_dev.openair0_cfg->samples_per_packet;
spp_rf = dev->devs->openair0_cfg->samples_per_packet;
samples_per_frame = dev->eth_dev.openair0_cfg->samples_per_frame;
samples_per_subframe = (unsigned int)samples_per_frame/10;
loopback = dev->loopback;
measurements = dev->measurements;
next_rx_pos = spp_eth;
#ifdef LOWLATENCY
struct sched_attr attr;
unsigned int flags = 0;
attr.size = sizeof(attr);
attr.sched_flags = 0;
attr.sched_nice = 0;
attr.sched_priority = 0;
attr.sched_policy = SCHED_DEADLINE;
attr.sched_runtime = (0.8 * 100) * 10000;//4 * 10000;
attr.sched_deadline = (0.9 * 100) * 10000;//rt_period-2000;
attr.sched_period = 1 * 1000000;//rt_period;
if (sched_setattr(0, &attr, flags) < 0 ) {
perror("[SCHED] eNB RX thread: sched_setattr failed (run with sudo)\n");
exit(-1);
}
#endif
while (rrh_exit == 0) {
while (rx_pos <(1 + subframe)*samples_per_subframe) {
//LOG_D(RRH,"starting a new send:%d %d\n",sync_trx,frame);
VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME( VCD_SIGNAL_DUMPER_FUNCTIONS_eNB_RX, 1 );
VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME( VCD_SIGNAL_DUMPER_VARIABLES_HW_FRAME_RX, frame);
VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME( VCD_SIGNAL_DUMPER_VARIABLES_HW_SUBFRAME_RX, subframe );
VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME( VCD_SIGNAL_DUMPER_VARIABLES_RX_PCK, pck_rx );
LOG_D(RRH,"pack=%d rx_pos=%d subframe=%d frame=%d\n ",pck_rx, rx_pos, subframe,frame);
if (dev->devs->type == NONE_DEV) {
VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME( VCD_SIGNAL_DUMPER_VARIABLES_RX_HWCNT, hw_counter );
VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME( VCD_SIGNAL_DUMPER_VARIABLES_RX_LHWCNT, last_hw_counter );
VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME( VCD_SIGNAL_DUMPER_VARIABLES_CNT, s_cnt );
if (!eNB_rx_started) {
eNB_rx_started=1; // set this flag to 1 to indicate that eNB started
if (RT_flag_eNB==1) {
last_hw_counter=hw_counter;//get current counter
}
} else {
if (RT_flag_eNB==1) {
if (hw_counter > last_hw_counter+1) {
printf("LR");
} else {
while ((hw_counter < last_hw_counter+1)) {
VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME( VCD_SIGNAL_DUMPER_FUNCTIONS_eNB_RX_SLEEP, 1 );
nanosleep(&time_req_1us,&time_rem_1us); //rt_sleep_ns(sleep_ns);
s_cnt++;
VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME( VCD_SIGNAL_DUMPER_FUNCTIONS_eNB_RX_SLEEP, 0 );
}
}
}
}
}
if (measurements == 1 ) clock_gettime(CLOCK_MONOTONIC,&time1);
if (loopback == 1 ) {
if (sync_eNB_rx[i]==0) {
rx_eNB[i] = (void*)&tx_buffer_eNB[i][tx_pos];
LOG_I(RRH,"tx_buffer_eNB[i][tx_pos]=%d ,tx_pos=%d\n",tx_buffer_eNB[i][tx_pos],tx_pos);
} else {
rx_eNB[i] = (void*)&rx_buffer_eNB[i][rx_pos];
LOG_I(RRH,"rx_buffer_eNB[i][rx_pos]=%d ,rx_pos=%d\n",rx_buffer_eNB[i][rx_pos],rx_pos);
}
}
for (i=0; i<dev->eth_dev.openair0_cfg->rx_num_channels; i++) {
rx_eNB[i] = (void*)&rx_buffer_eNB[i][rx_pos];
LOG_D(RRH," rx_eNB[i]=%p rx_buffer_eNB[i][rx_pos]=%p ,rx_pos=%d, i=%d ts=%d\n",rx_eNB[i],&rx_buffer_eNB[i][rx_pos],rx_pos,i,timestamp_rx);
}
VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME( VCD_SIGNAL_DUMPER_VARIABLES_RXCNT, rx_pos );
if (dev->devs->type != NONE_DEV) {
VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME( VCD_SIGNAL_DUMPER_FUNCTIONS_TRX_READ_RF, 1 );
/* Read operation to RF device (RX)*/
if ( dev->devs->trx_read_func (dev->devs,
×tamp_rx,
rx_eNB,
spp_rf,
dev->devs->openair0_cfg->rx_num_channels
)<0) {
perror("RRH eNB : USRP read");
}
VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME( VCD_SIGNAL_DUMPER_FUNCTIONS_TRX_READ_RF, 0 );
}
VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME( VCD_SIGNAL_DUMPER_VARIABLES_RX_TS, timestamp_rx&0xffffffff );
VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME( VCD_SIGNAL_DUMPER_FUNCTIONS_TRX_WRITE, 1 );
if ((bytes_sent = dev->eth_dev.trx_write_func (&dev->eth_dev,
timestamp_rx,
rx_eNB,
spp_eth,
dev->eth_dev.openair0_cfg->rx_num_channels,
0))<0) {
perror("RRH eNB : ETHERNET write");
}
VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME( VCD_SIGNAL_DUMPER_FUNCTIONS_TRX_WRITE, 0 );
/* when there is no RF timestamp is updated by number of samples */
if (dev->devs->type == NONE_DEV) {
timestamp_rx+=spp_eth;
last_hw_counter=hw_counter;
}
if (measurements == 1 ) {
clock_gettime(CLOCK_MONOTONIC,&time2);
if (trace_cnt++ > 10) {
total_rx_time = (unsigned int)(time2.tv_nsec - time0.tv_nsec);
if (total_rx_time < 0)
total_rx_time=1000000000-total_rx_time;
if ((total_rx_time > 0) && (total_rx_time < 1000000000)) {
trial++;
if (total_rx_time < min_rx_time)
min_rx_time = total_rx_time;
if (total_rx_time > max_rx_time){
max_rx_time = total_rx_time;
LOG_I(RRH,"Max value %d update at rx_position %d \n",total_rx_time,timestamp_rx);
}
average_rx_time = (long long unsigned int)((average_rx_time*trial)+total_rx_time)/(trial+1);
}
if (s_period++ == PRINTF_PERIOD) {
s_period=0;
LOG_I(RRH,"Average eNB RX time : %lu ns\tMax RX time : %lu ns\tMin RXX time : %lu ns\n",average_rx_time,max_rx_time,min_rx_time);
}
}
memcpy(&time0,&time2,sizeof(struct timespec));
}
if (loopback == 1 ) {
pthread_mutex_lock(&sync_eNB_mutex[i]);
sync_eNB_rx[i]--;
pthread_mutex_unlock(&sync_eNB_mutex[i]);
}
rx_pos += spp_eth;
pck_rx++;
next_rx_pos=(rx_pos+spp_eth);
VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME( VCD_SIGNAL_DUMPER_FUNCTIONS_eNB_RX, 0 );
/*
if (frame>50) {
pthread_mutex_lock(&sync_trx_mutex);
while (sync_trx) {
pthread_cond_wait(&sync_trx_cond,&sync_trx_mutex);
}
sync_trx=1;
LOG_D(RRH,"out of while send:%d %d\n",sync_trx,frame);
pthread_cond_signal(&sync_trx_cond);
pthread_mutex_unlock(&sync_trx_mutex);
}*/
} // while
subframe++;
s_cnt=0;
/* wrap around rx buffer index */
if (next_rx_pos >= samples_per_frame)
next_rx_pos -= samples_per_frame;
if (rx_pos >= samples_per_frame)
rx_pos -= samples_per_frame;
/* wrap around subframe number */
if (subframe == 10 ) {
subframe = 0;
frame++;
}
} //while (eNB_exit==0)
return 0;
}
/* Receive from eNB and transmit to RF */
void *rrh_eNB_tx_thread(void *arg) {
struct timespec time0a,time0,time1,time2;
rrh_module_t *dev = (rrh_module_t *)arg;
struct timespec time_req_1us, time_rem_1us;
ssize_t bytes_received;
int i;
openair0_timestamp last_hw_counter=0;
unsigned int samples_per_frame=0,samples_per_subframe=0;
unsigned int spp_rf=0, spp_eth=0;
uint8_t loopback=0,measurements=0;
unsigned int subframe=0,frame=0;
unsigned int pck_tx=0;
#ifdef LOWLATENCY
struct sched_attr attr;
unsigned int flags = 0;
attr.size = sizeof(attr);
attr.sched_flags = 0;
attr.sched_nice = 0;
attr.sched_priority = 0;
attr.sched_policy = SCHED_DEADLINE;
attr.sched_runtime = (0.8 * 100) * 10000;
attr.sched_deadline = (0.9 * 100) * 10000;
attr.sched_period = 1 * 1000000;
if (sched_setattr(0, &attr, flags) < 0 ) {
perror("[SCHED] eNB TX thread: sched_setattr failed\n");
exit(-1);
}
#endif
time_req_1us.tv_sec = 1;
time_req_1us.tv_nsec = 0;
spp_eth = dev->eth_dev.openair0_cfg->samples_per_packet;
spp_rf = dev->devs->openair0_cfg->samples_per_packet;
samples_per_frame = dev->eth_dev.openair0_cfg->samples_per_frame;
samples_per_subframe = (unsigned int)samples_per_frame/10;
tx_pos=0;
loopback = dev->loopback;
measurements = dev->measurements;
while (rrh_exit == 0) {
while (tx_pos < (1 + subframe)*samples_per_subframe) {
//LOG_D(RRH,"bef lock read:%d %d\n",sync_trx,frame);
//pthread_mutex_lock(&sync_trx_mutex);
//while (!sync_trx) {
//LOG_D(RRH,"in sync read:%d %d\n",sync_trx,frame);
//pthread_cond_wait(&sync_trx_cond,&sync_trx_mutex);
//}
//LOG_D(RRH,"out of while read:%d %d\n",sync_trx,frame);
VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME( VCD_SIGNAL_DUMPER_FUNCTIONS_eNB_TX, 1 );
VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME( VCD_SIGNAL_DUMPER_VARIABLES_HW_FRAME, frame);
VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME( VCD_SIGNAL_DUMPER_VARIABLES_HW_SUBFRAME, subframe );
VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME( VCD_SIGNAL_DUMPER_VARIABLES_TX_PCK, pck_tx );
if (measurements == 1 ) clock_gettime(CLOCK_MONOTONIC,&time1);
for (i=0; i<dev->eth_dev.openair0_cfg->tx_num_channels; i++) tx_eNB[i] = (void*)&tx_buffer_eNB[i][tx_pos];
VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME( VCD_SIGNAL_DUMPER_VARIABLES_TXCNT, tx_pos );
VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME( VCD_SIGNAL_DUMPER_FUNCTIONS_TRX_READ, 1 );
/* Read operation to ETHERNET device */
if (( bytes_received = dev->eth_dev.trx_read_func(&dev->eth_dev,
×tamp_tx,
tx_eNB,
spp_eth,
dev->eth_dev.openair0_cfg->tx_num_channels))<0) {
perror("RRH eNB : ETHERNET read");
}
VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME( VCD_SIGNAL_DUMPER_FUNCTIONS_TRX_READ, 0 );
if (dev->devs->type != NONE_DEV) {
LOG_D(RRH," tx_buffer_eNB[i][tx_pos]=%x t_buffer_eNB[i][tx_pos+1]=%x t_buffer_eNB[i][tx_pos+2]=%x \n",tx_buffer_eNB[0][tx_pos],tx_buffer_eNB[0][tx_pos+1],tx_buffer_eNB[0][tx_pos+2]);
VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME( VCD_SIGNAL_DUMPER_FUNCTIONS_TRX_WRITE_RF, 1 );
/* Write operation to RF device (TX)*/
if ( dev->devs->trx_write_func (dev->devs,
timestamp_tx,
tx_eNB,
spp_rf,
dev->devs->openair0_cfg->tx_num_channels,
1)<0){
perror("RRH eNB : USRP write");
}
VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME( VCD_SIGNAL_DUMPER_FUNCTIONS_TRX_WRITE_RF, 0 );
}
VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME( VCD_SIGNAL_DUMPER_VARIABLES_TX_TS, timestamp_tx&0xffffffff );
if (dev->devs->type == NONE_DEV) last_hw_counter=hw_counter;
if (loopback ==1 ) {
while (sync_eNB_rx[i]==0)
nanosleep(&time_req_1us,&time_rem_1us);
pthread_mutex_lock(&sync_eNB_mutex[i]);
sync_eNB_rx[i]++;
pthread_mutex_unlock(&sync_eNB_mutex[i]);
}
if (measurements == 1 ) {
clock_gettime(CLOCK_MONOTONIC,&time2);
memcpy(&time0,&time2,sizeof(struct timespec));
}
prev_tx_pos=tx_pos;
tx_pos += spp_eth;
pck_tx++;
//VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_eNB_TX, 0 );
//sync_trx=0;
//pthread_cond_signal(&sync_trx_cond);
//pthread_mutex_unlock(&sync_trx_mutex);
}
/* wrap around tx buffer index */
if (tx_pos >= samples_per_frame)
tx_pos -= samples_per_frame;
/* wrap around subframe number */
subframe++;
if (subframe == 10 ) {
subframe = 0; // the radio frame is complete, start over
frame++;
}
} //while (eNB_exit==0)
return 0;
}
static void calc_rt_period_ns( openair0_config_t *openair0_cfg) {
rt_period= (double)(openair0_cfg->samples_per_packet/(openair0_cfg->samples_per_frame/10.0)*1000000);
AssertFatal(rt_period > 0, "Invalid rt period !%u\n", rt_period);
LOG_I(RRH,"[eNB] Real time period is set to %u ns\n", rt_period);
}
static void check_dev_config( rrh_module_t *mod_enb) {
AssertFatal( (mod_enb->devs->openair0_cfg->num_rb_dl==100 || mod_enb->devs->openair0_cfg->num_rb_dl==50 || mod_enb->devs->openair0_cfg->num_rb_dl==25 || mod_enb->devs->openair0_cfg->num_rb_dl==6) , "Invalid number of resource blocks! %d\n", mod_enb->devs->openair0_cfg->num_rb_dl);
AssertFatal( mod_enb->devs->openair0_cfg->samples_per_frame > 0 , "Invalid number of samples per frame! %d\n",mod_enb->devs->openair0_cfg->samples_per_frame);
AssertFatal( mod_enb->devs->openair0_cfg->sample_rate > 0.0, "Invalid sample rate! %f\n", mod_enb->devs->openair0_cfg->sample_rate);
AssertFatal( mod_enb->devs->openair0_cfg->samples_per_packet > 0 , "Invalid number of samples per packet! %d\n",mod_enb->devs->openair0_cfg->samples_per_packet);
AssertFatal( mod_enb->devs->openair0_cfg->rx_num_channels > 0 , "Invalid number of RX antennas! %d\n", mod_enb->devs->openair0_cfg->rx_num_channels);
AssertFatal( mod_enb->devs->openair0_cfg->tx_num_channels > 0 , "Invalid number of TX antennas! %d\n", mod_enb->devs->openair0_cfg->tx_num_channels);
AssertFatal( mod_enb->devs->openair0_cfg->rx_freq[0] > 0.0 ,"Invalid RX frequency! %f\n", mod_enb->devs->openair0_cfg->rx_freq[0]);
AssertFatal( mod_enb->devs->openair0_cfg->tx_freq[0] > 0.0 ,"Invalid TX frequency! %f\n", mod_enb->devs->openair0_cfg->tx_freq[0]);
AssertFatal( mod_enb->devs->openair0_cfg->rx_gain[0] > 0.0 ,"Invalid RX gain! %f\n", mod_enb->devs->openair0_cfg->rx_gain[0]);
AssertFatal( mod_enb->devs->openair0_cfg->tx_gain[0] > 0.0 ,"Invalid TX gain! %f\n", mod_enb->devs->openair0_cfg->tx_gain[0]);
AssertFatal( mod_enb->devs->openair0_cfg->rx_bw > 0.0 ,"Invalid RX bw! %f\n", mod_enb->devs->openair0_cfg->rx_bw);
AssertFatal( mod_enb->devs->openair0_cfg->tx_bw > 0.0 ,"Invalid RX bw! %f\n", mod_enb->devs->openair0_cfg->tx_bw);
AssertFatal( mod_enb->devs->openair0_cfg->autocal[0] > 0 , "Invalid auto calibration choice! %d\n", mod_enb->devs->openair0_cfg->autocal[0]);
printf("\n---------------------RF device configuration parameters---------------------\n");
printf("\tMod_id=%d\n \tlog level=%d\n \tDL_RB=%d\n \tsamples_per_frame=%d\n \tsample_rate=%f\n \tsamples_per_packet=%d\n \ttx_scheduling_advance=%d\n \ttx_sample_advance=%d\n \trx_num_channels=%d\n \ttx_num_channels=%d\n \trx_freq_0=%f\n \ttx_freq_0=%f\n \trx_freq_1=%f\n \ttx_freq_1=%f\n \trx_freq_2=%f\n \ttx_freq_2=%f\n \trx_freq_3=%f\n \ttx_freq_3=%f\n \trxg_mode=%d\n \trx_gain_0=%f\n \ttx_gain_0=%f\n \trx_gain_1=%f\n \ttx_gain_1=%f\n \trx_gain_2=%f\n \ttx_gain_2=%f\n \trx_gain_3=%f\n \ttx_gain_3=%f\n \trx_gain_offset_2=%f\n \ttx_gain_offset_3=%f\n \trx_bw=%f\n \ttx_bw=%f\n \tautocal=%d\n",
mod_enb->devs->openair0_cfg->Mod_id,
mod_enb->devs->openair0_cfg->log_level,
mod_enb->devs->openair0_cfg->num_rb_dl,
mod_enb->devs->openair0_cfg->samples_per_frame,
mod_enb->devs->openair0_cfg->sample_rate,
mod_enb->devs->openair0_cfg->samples_per_packet,
mod_enb->devs->openair0_cfg->tx_scheduling_advance,
mod_enb->devs->openair0_cfg->tx_sample_advance,
mod_enb->devs->openair0_cfg->rx_num_channels,
mod_enb->devs->openair0_cfg->tx_num_channels,
mod_enb->devs->openair0_cfg->rx_freq[0],
mod_enb->devs->openair0_cfg->tx_freq[0],
mod_enb->devs->openair0_cfg->rx_freq[1],
mod_enb->devs->openair0_cfg->tx_freq[1],
mod_enb->devs->openair0_cfg->rx_freq[2],
mod_enb->devs->openair0_cfg->tx_freq[2],
mod_enb->devs->openair0_cfg->rx_freq[3],
mod_enb->devs->openair0_cfg->tx_freq[3],
mod_enb->devs->openair0_cfg->rxg_mode[0],
mod_enb->devs->openair0_cfg->tx_gain[0],
mod_enb->devs->openair0_cfg->tx_gain[0],
mod_enb->devs->openair0_cfg->rx_gain[1],
mod_enb->devs->openair0_cfg->tx_gain[1],
mod_enb->devs->openair0_cfg->rx_gain[2],
mod_enb->devs->openair0_cfg->tx_gain[2],
mod_enb->devs->openair0_cfg->rx_gain[3],
mod_enb->devs->openair0_cfg->tx_gain[3],
//mod_enb->devs->openair0_cfg->rx_gain_offset[0],
//mod_enb->devs->openair0_cfg->rx_gain_offset[1],
mod_enb->devs->openair0_cfg->rx_gain_offset[2],
mod_enb->devs->openair0_cfg->rx_gain_offset[3],
mod_enb->devs->openair0_cfg->rx_bw,
mod_enb->devs->openair0_cfg->tx_bw,
mod_enb->devs->openair0_cfg->autocal[0]
);
printf("----------------------------------------------------------------------------\n");
}