lte-enb.c 58.2 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70
/*******************************************************************************
    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 lte-enb.c
 * \brief Top-level threads for eNodeB
 * \author R. Knopp, F. Kaltenberger, Navid Nikaein
 * \date 2012
 * \version 0.1
 * \company Eurecom
 * \email: knopp@eurecom.fr,florian.kaltenberger@eurecom.fr, navid.nikaein@eurecom.fr
 * \note
 * \warning
 */
#define _GNU_SOURCE
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/mman.h>
#include <sched.h>
#include <linux/sched.h>
#include <signal.h>
#include <execinfo.h>
#include <getopt.h>
#include <sys/sysinfo.h>
#include "rt_wrapper.h"

#undef MALLOC //there are two conflicting definitions, so we better make sure we don't use it at all

#include "assertions.h"
#include "msc.h"

#include "PHY/types.h"

#include "PHY/defs.h"
#undef MALLOC //there are two conflicting definitions, so we better make sure we don't use it at all
//#undef FRAME_LENGTH_COMPLEX_SAMPLES //there are two conflicting definitions, so we better make sure we don't use it at all

#include "../../ARCH/COMMON/common_lib.h"

//#undef FRAME_LENGTH_COMPLEX_SAMPLES //there are two conflicting definitions, so we better make sure we don't use it at all

71
#include "PHY/LTE_TRANSPORT/if4_tools.h"
72
#include "PHY/LTE_TRANSPORT/if5_tools.h"
73

74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111
#include "PHY/extern.h"
#include "SCHED/extern.h"
#include "LAYER2/MAC/extern.h"

#include "../../SIMU/USER/init_lte.h"

#include "LAYER2/MAC/defs.h"
#include "LAYER2/MAC/extern.h"
#include "LAYER2/MAC/proto.h"
#include "RRC/LITE/extern.h"
#include "PHY_INTERFACE/extern.h"

#ifdef SMBV
#include "PHY/TOOLS/smbv.h"
unsigned short config_frames[4] = {2,9,11,13};
#endif
#include "UTIL/LOG/log_extern.h"
#include "UTIL/OTG/otg_tx.h"
#include "UTIL/OTG/otg_externs.h"
#include "UTIL/MATH/oml.h"
#include "UTIL/LOG/vcd_signal_dumper.h"
#include "UTIL/OPT/opt.h"
#include "enb_config.h"
//#include "PHY/TOOLS/time_meas.h"

#ifndef OPENAIR2
#include "UTIL/OTG/otg_extern.h"
#endif

#if defined(ENABLE_ITTI)
# if defined(ENABLE_USE_MME)
#   include "s1ap_eNB.h"
#ifdef PDCP_USE_NETLINK
#   include "SIMULATION/ETH_TRANSPORT/proto.h"
#endif
# endif
#endif

Rohit Gupta's avatar
bugfix  
Rohit Gupta committed
112 113
#include "T.h"

114 115 116 117 118 119 120 121 122 123
//#define DEBUG_THREADS 1

//#define USRP_DEBUG 1
struct timing_info_t {
  //unsigned int frame, hw_slot, last_slot, next_slot;
  RTIME time_min, time_max, time_avg, time_last, time_now;
  //unsigned int mbox0, mbox1, mbox2, mbox_target;
  unsigned int n_samples;
} timing_info;

124 125
// Fix per CC openair rf/if device update
// extern openair0_device openair0;
126 127 128 129 130 131 132 133 134 135 136 137 138

#if defined(ENABLE_ITTI)
extern volatile int             start_eNB;
extern volatile int             start_UE;
#endif
extern volatile int                    oai_exit;

extern openair0_config_t openair0_cfg[MAX_CARDS];

extern pthread_cond_t sync_cond;
extern pthread_mutex_t sync_mutex;
extern int sync_var;

139
//pthread_t                       main_eNB_thread;
140 141 142

time_stats_t softmodem_stats_mt; // main thread
time_stats_t softmodem_stats_hw; //  hw acquisition
knopp's avatar
knopp committed
143
time_stats_t softmodem_stats_rxtx_sf; // total tx time
144
time_stats_t softmodem_stats_rx_sf; // total rx time
145 146 147 148 149 150 151 152 153 154 155 156 157
int32_t **rxdata;
int32_t **txdata;

static int                      time_offset[4] = {0,0,0,0};

/* mutex, cond and variable to serialize phy proc TX calls
 * (this mechanism may be relaxed in the future for better
 * performances)
 */
static struct {
  pthread_mutex_t  mutex_phy_proc_tx;
  pthread_cond_t   cond_phy_proc_tx;
  volatile uint8_t phy_proc_CC_id;
158
} sync_phy_proc;
159 160 161

void exit_fun(const char* s);

knopp's avatar
knopp committed
162
void init_eNB(eNB_func_t node_function[], eNB_timing_t node_timing[],int nb_inst,eth_params_t *,int);
163
void stop_eNB(int nb_inst);
164 165


knopp's avatar
knopp committed
166
static inline void thread_top_init(char *thread_name,
167
				   int affinity,
knopp's avatar
knopp committed
168 169 170
				   uint64_t runtime,
				   uint64_t deadline,
				   uint64_t period) {
knopp's avatar
knopp committed
171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190

  MSC_START_USE();

#ifdef DEADLINE_SCHEDULER
  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  = runtime;
  attr.sched_deadline = deadline;
  attr.sched_period   = period; 

  if (sched_setattr(0, &attr, flags) < 0 ) {
    perror("[SCHED] eNB tx thread: sched_setattr failed\n");
Rohit Gupta's avatar
Rohit Gupta committed
191
    exit_fun("Error setting deadline scheduler");
knopp's avatar
knopp committed
192 193
  }

194
  LOG_I( HW, "[SCHED] eNB %s deadline thread started on CPU %d\n", thread_name,sched_getcpu() );
knopp's avatar
knopp committed
195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210

#else //LOW_LATENCY
  int policy, s, j;
  struct sched_param sparam;
  char cpu_affinity[1024];
  cpu_set_t cpuset;

  /* Set affinity mask to include CPUs 1 to MAX_CPUS */
  /* CPU 0 is reserved for UHD threads */
  /* CPU 1 is reserved for all RX_TX threads */
  /* Enable CPU Affinity only if number of CPUs >2 */
  CPU_ZERO(&cpuset);

#ifdef CPU_AFFINITY
  if (get_nprocs() > 2)
  {
211 212 213 214
    if (affinity == 0)
      CPU_SET(0,&cpuset);
    else
      for (j = 1; j < get_nprocs(); j++)
knopp's avatar
knopp committed
215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239
        CPU_SET(j, &cpuset);
    s = pthread_setaffinity_np(pthread_self(), sizeof(cpu_set_t), &cpuset);
    if (s != 0)
    {
      perror( "pthread_setaffinity_np");
      exit_fun("Error setting processor affinity");
    }
  }
#endif //CPU_AFFINITY

  /* Check the actual affinity mask assigned to the thread */
  s = pthread_getaffinity_np(pthread_self(), sizeof(cpu_set_t), &cpuset);
  if (s != 0) {
    perror( "pthread_getaffinity_np");
    exit_fun("Error getting processor affinity ");
  }
  memset(cpu_affinity,0,sizeof(cpu_affinity));
  for (j = 0; j < CPU_SETSIZE; j++)
    if (CPU_ISSET(j, &cpuset)) {  
      char temp[1024];
      sprintf (temp, " CPU_%d", j);
      strcat(cpu_affinity, temp);
    }

  memset(&sparam, 0, sizeof(sparam));
240
  sparam.sched_priority = sched_get_priority_max(SCHED_FIFO);
knopp's avatar
knopp committed
241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267
  policy = SCHED_FIFO ; 
  
  s = pthread_setschedparam(pthread_self(), policy, &sparam);
  if (s != 0) {
    perror("pthread_setschedparam : ");
    exit_fun("Error setting thread priority");
  }
  
  s = pthread_getschedparam(pthread_self(), &policy, &sparam);
  if (s != 0) {
    perror("pthread_getschedparam : ");
    exit_fun("Error getting thread priority");
  }

  LOG_I(HW, "[SCHED][eNB] %s started on CPU %d TID %ld, sched_policy = %s , priority = %d, CPU Affinity=%s \n",thread_name,sched_getcpu(),gettid(),
                   (policy == SCHED_FIFO)  ? "SCHED_FIFO" :
                   (policy == SCHED_RR)    ? "SCHED_RR" :
                   (policy == SCHED_OTHER) ? "SCHED_OTHER" :
                   "???",
                   sparam.sched_priority, cpu_affinity );

#endif //LOW_LATENCY

  mlockall(MCL_CURRENT | MCL_FUTURE);

}

knopp's avatar
knopp committed
268
static inline void wait_sync(char *thread_name) {
knopp's avatar
knopp committed
269 270 271 272 273 274 275 276 277 278 279 280 281

  printf( "waiting for sync (%s)\n",thread_name);
  pthread_mutex_lock( &sync_mutex );
  
  while (sync_var<0)
    pthread_cond_wait( &sync_cond, &sync_mutex );
  
  pthread_mutex_unlock(&sync_mutex);
  
  printf( "got sync (%s)\n", thread_name);

}

Sandeep Kumar's avatar
Sandeep Kumar committed
282 283
void do_OFDM_mod_rt(int subframe,PHY_VARS_eNB *phy_vars_eNB) {
     
284 285
  unsigned int aa,slot_offset, slot_offset_F;
  int dummy_tx_b[7680*4] __attribute__((aligned(32)));
knopp's avatar
knopp committed
286
  int i,j, tx_offset;
287 288
  int slot_sizeF = (phy_vars_eNB->frame_parms.ofdm_symbol_size)*
                   ((phy_vars_eNB->frame_parms.Ncp==1) ? 6 : 7);
knopp's avatar
knopp committed
289 290
  int len,len2;
  int16_t *txdata;
291

292 293
  VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_PHY_ENB_SFGEN , 1 );

294 295
  slot_offset_F = (subframe<<1)*slot_sizeF;

296
  slot_offset = subframe*phy_vars_eNB->frame_parms.samples_per_tti;
297

298 299
  if ((subframe_select(&phy_vars_eNB->frame_parms,subframe)==SF_DL)||
      ((subframe_select(&phy_vars_eNB->frame_parms,subframe)==SF_S))) {
300 301
    //    LOG_D(HW,"Frame %d: Generating slot %d\n",frame,next_slot);

302 303 304
    for (aa=0; aa<phy_vars_eNB->frame_parms.nb_antennas_tx; aa++) {
      if (phy_vars_eNB->frame_parms.Ncp == EXTENDED) {
        PHY_ofdm_mod(&phy_vars_eNB->common_vars.txdataF[0][aa][slot_offset_F],
305
                     dummy_tx_b,
306
                     phy_vars_eNB->frame_parms.ofdm_symbol_size,
307
                     6,
308
                     phy_vars_eNB->frame_parms.nb_prefix_samples,
309
                     CYCLIC_PREFIX);
310 311 312
        PHY_ofdm_mod(&phy_vars_eNB->common_vars.txdataF[0][aa][slot_offset_F+slot_sizeF],
                     dummy_tx_b+(phy_vars_eNB->frame_parms.samples_per_tti>>1),
                     phy_vars_eNB->frame_parms.ofdm_symbol_size,
313
                     6,
314
                     phy_vars_eNB->frame_parms.nb_prefix_samples,
315 316
                     CYCLIC_PREFIX);
      } else {
317
        normal_prefix_mod(&phy_vars_eNB->common_vars.txdataF[0][aa][slot_offset_F],
318 319
                          dummy_tx_b,
                          7,
320
                          &(phy_vars_eNB->frame_parms));
321
	// if S-subframe generate first slot only
Sandeep Kumar's avatar
Sandeep Kumar committed
322
	if (subframe_select(&phy_vars_eNB->frame_parms,subframe) == SF_DL) 
323 324
	  normal_prefix_mod(&phy_vars_eNB->common_vars.txdataF[0][aa][slot_offset_F+slot_sizeF],
			    dummy_tx_b+(phy_vars_eNB->frame_parms.samples_per_tti>>1),
325
			    7,
326
			    &(phy_vars_eNB->frame_parms));
327 328 329
      }

      // if S-subframe generate first slot only
330 331
      if (subframe_select(&phy_vars_eNB->frame_parms,subframe) == SF_S)
	len = phy_vars_eNB->frame_parms.samples_per_tti>>1;
332
      else
333
	len = phy_vars_eNB->frame_parms.samples_per_tti;
334 335 336 337 338 339 340
      /*
      for (i=0;i<len;i+=4) {
	dummy_tx_b[i] = 0x100;
	dummy_tx_b[i+1] = 0x01000000;
	dummy_tx_b[i+2] = 0xff00;
	dummy_tx_b[i+3] = 0xff000000;
	}*/
knopp's avatar
knopp committed
341 342 343 344 345 346 347 348 349 350 351 352 353 354
      
      if (slot_offset+time_offset[aa]<0) {
	txdata = (int16_t*)&phy_vars_eNB->common_vars.txdata[0][aa][(LTE_NUMBER_OF_SUBFRAMES_PER_FRAME*phy_vars_eNB->frame_parms.samples_per_tti)+tx_offset];
        len2 = -(slot_offset+time_offset[aa]);
	len2 = (len2>len) ? len : len2;
	for (i=0; i<(len2<<1); i++) {
	  txdata[i] = ((int16_t*)dummy_tx_b)[i]<<openair0_cfg[0].iq_txshift;
	}
	if (len2<len) {
	  txdata = (int16_t*)&phy_vars_eNB->common_vars.txdata[0][aa][0];
	  for (j=0; i<(len<<1); i++,j++) {
	    txdata[j++] = ((int16_t*)dummy_tx_b)[i]<<openair0_cfg[0].iq_txshift;
	  }
	}
Sandeep Kumar's avatar
Sandeep Kumar committed
355
      }  
knopp's avatar
knopp committed
356 357 358 359 360 361 362 363 364 365 366 367 368 369 370
      else if ((slot_offset+time_offset[aa]+len)>(LTE_NUMBER_OF_SUBFRAMES_PER_FRAME*phy_vars_eNB->frame_parms.samples_per_tti)) {
	tx_offset = (int)slot_offset+time_offset[aa];
	txdata = (int16_t*)&phy_vars_eNB->common_vars.txdata[0][aa][tx_offset];
	len2 = -tx_offset+LTE_NUMBER_OF_SUBFRAMES_PER_FRAME*phy_vars_eNB->frame_parms.samples_per_tti;
	for (i=0; i<(len2<<1); i++) {
	  txdata[i] = ((int16_t*)dummy_tx_b)[i]<<openair0_cfg[0].iq_txshift;
	}
	txdata = (int16_t*)&phy_vars_eNB->common_vars.txdata[0][aa][0];
	for (j=0; i<(len<<1); i++,j++) {
	  txdata[j++] = ((int16_t*)dummy_tx_b)[i]<<openair0_cfg[0].iq_txshift;
	}
      }
      else {
	tx_offset = (int)slot_offset+time_offset[aa];
	txdata = (int16_t*)&phy_vars_eNB->common_vars.txdata[0][aa][tx_offset];
371

knopp's avatar
knopp committed
372 373 374 375 376
	for (i=0; i<(len<<1); i++) {
	  txdata[i] = ((int16_t*)dummy_tx_b)[i]<<openair0_cfg[0].iq_txshift;
	}
      }
      
377
     // if S-subframe switch to RX in second subframe
knopp's avatar
knopp committed
378
      /*
379
     if (subframe_select(&phy_vars_eNB->frame_parms,subframe) == SF_S) {
380
       for (i=0; i<len; i++) {
381
	 phy_vars_eNB->common_vars.txdata[0][aa][tx_offset++] = 0x00010001;
382 383
       }
     }
knopp's avatar
knopp committed
384
      */
385
     if ((((phy_vars_eNB->frame_parms.tdd_config==0) ||
Sandeep Kumar's avatar
Sandeep Kumar committed
386 387 388 389
	   (phy_vars_eNB->frame_parms.tdd_config==1) ||
	   (phy_vars_eNB->frame_parms.tdd_config==2) ||
	   (phy_vars_eNB->frame_parms.tdd_config==6)) && 
	   (subframe==0)) || (subframe==5)) {
390 391 392
       // turn on tx switch N_TA_offset before
       //LOG_D(HW,"subframe %d, time to switch to tx (N_TA_offset %d, slot_offset %d) \n",subframe,phy_vars_eNB->N_TA_offset,slot_offset);
       for (i=0; i<phy_vars_eNB->N_TA_offset; i++) {
Sandeep Kumar's avatar
Sandeep Kumar committed
393 394 395
         tx_offset = (int)slot_offset+time_offset[aa]+i-phy_vars_eNB->N_TA_offset/2;
         if (tx_offset<0)
           tx_offset += LTE_NUMBER_OF_SUBFRAMES_PER_FRAME*phy_vars_eNB->frame_parms.samples_per_tti;
396
	 
Sandeep Kumar's avatar
Sandeep Kumar committed
397 398
         if (tx_offset>=(LTE_NUMBER_OF_SUBFRAMES_PER_FRAME*phy_vars_eNB->frame_parms.samples_per_tti))
           tx_offset -= LTE_NUMBER_OF_SUBFRAMES_PER_FRAME*phy_vars_eNB->frame_parms.samples_per_tti;
399
	 
Sandeep Kumar's avatar
Sandeep Kumar committed
400
         phy_vars_eNB->common_vars.txdata[0][aa][tx_offset] = 0x00000000;
401 402 403 404
       }
     }
    }
  }
405 406 407 408 409
  VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_PHY_ENB_SFGEN , 0 );
}

void tx_fh_if5(PHY_VARS_eNB *eNB,eNB_rxtx_proc_t *proc) {
  uint8_t seqno;
Raymond Knopp's avatar
Raymond Knopp committed
410
  VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME( VCD_SIGNAL_DUMPER_VARIABLES_TRX_TST, proc->timestamp_tx&0xffffffff );
411 412 413 414 415 416 417
  send_IF5(eNB, proc->timestamp_tx, proc->subframe_tx, &seqno, IF5_RRH_GW_DL);
}

void tx_fh_if4p5(PHY_VARS_eNB *eNB,eNB_rxtx_proc_t *proc) {    
  send_IF4p5(eNB,proc->frame_tx, proc->subframe_tx, IF4p5_PDLFFT, 0);
}

Raymond Knopp's avatar
Raymond Knopp committed
418 419 420 421
void proc_tx_high0(PHY_VARS_eNB *eNB,
		   eNB_rxtx_proc_t *proc,
		   relaying_type_t r_type,
		   PHY_VARS_RN *rn) {
422

knopp's avatar
knopp committed
423 424 425
  int offset = proc == &eNB->proc.proc_rxtx[0] ? 0 : 1;

  VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME( VCD_SIGNAL_DUMPER_VARIABLES_FRAME_NUMBER_TX0_ENB+offset, proc->frame_tx );
426
  VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME( VCD_SIGNAL_DUMPER_VARIABLES_SUBFRAME_NUMBER_TX0_ENB+offset, proc->subframe_tx );
knopp's avatar
knopp committed
427

428
  phy_procedures_eNB_TX(eNB,proc,r_type,rn,1);
429 430 431 432 433 434 435 436 437 438 439 440 441 442

  /* we're done, let the next one proceed */
  if (pthread_mutex_lock(&sync_phy_proc.mutex_phy_proc_tx) != 0) {
    LOG_E(PHY, "[SCHED][eNB] error locking PHY proc mutex for eNB TX proc\n");
    exit_fun("nothing to add");
  }	
  sync_phy_proc.phy_proc_CC_id++;
  sync_phy_proc.phy_proc_CC_id %= MAX_NUM_CCs;
  pthread_cond_broadcast(&sync_phy_proc.cond_phy_proc_tx);
  if (pthread_mutex_unlock(&sync_phy_proc.mutex_phy_proc_tx) != 0) {
    LOG_E(PHY, "[SCHED][eNB] error unlocking PHY proc mutex for eNB TX proc\n");
    exit_fun("nothing to add");
  }

Raymond Knopp's avatar
Raymond Knopp committed
443 444 445 446 447 448
}

void proc_tx_high(PHY_VARS_eNB *eNB,
		  eNB_rxtx_proc_t *proc,
		  relaying_type_t r_type,
		  PHY_VARS_RN *rn) {
449

knopp's avatar
knopp committed
450

Raymond Knopp's avatar
Raymond Knopp committed
451 452 453 454 455 456 457 458 459 460 461 462
  // do PHY high
  proc_tx_high0(eNB,proc,r_type,rn);

  // if TX fronthaul go ahead 
  if (eNB->tx_fh) eNB->tx_fh(eNB,proc);

}

void proc_tx_full(PHY_VARS_eNB *eNB,
		  eNB_rxtx_proc_t *proc,
		  relaying_type_t r_type,
		  PHY_VARS_RN *rn) {
463

Raymond Knopp's avatar
Raymond Knopp committed
464 465 466 467 468 469

  // do PHY high
  proc_tx_high0(eNB,proc,r_type,rn);
  // do OFDM modulation
  do_OFDM_mod_rt(proc->subframe_tx,eNB);
  // if TX fronthaul go ahead 
470 471 472 473 474 475
  if (eNB->tx_fh) eNB->tx_fh(eNB,proc);



}

Raymond Knopp's avatar
Raymond Knopp committed
476 477 478 479
void proc_tx_rru_if4p5(PHY_VARS_eNB *eNB,
		       eNB_rxtx_proc_t *proc,
		       relaying_type_t r_type,
		       PHY_VARS_RN *rn) {
480 481 482 483 484

  uint32_t symbol_number=0;
  uint32_t symbol_mask, symbol_mask_full;
  uint16_t packet_type;

knopp's avatar
knopp committed
485 486 487
  int offset = proc == &eNB->proc.proc_rxtx[0] ? 0 : 1;

  VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME( VCD_SIGNAL_DUMPER_VARIABLES_FRAME_NUMBER_TX0_ENB+offset, proc->frame_tx );
488
  VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME( VCD_SIGNAL_DUMPER_VARIABLES_SUBFRAME_NUMBER_TX0_ENB+offset, proc->subframe_tx );
knopp's avatar
knopp committed
489

490 491 492 493 494
  /// **** recv_IF4 of txdataF from RCC **** ///             
  symbol_number = 0;
  symbol_mask = 0;
  symbol_mask_full = (1<<eNB->frame_parms.symbols_per_tti)-1;
  
knopp's avatar
knopp committed
495

496 497 498 499 500 501 502 503 504
  do { 
    recv_IF4p5(eNB, &proc->frame_tx, &proc->subframe_tx, &packet_type, &symbol_number);
    symbol_mask = symbol_mask | (1<<symbol_number);
  } while (symbol_mask != symbol_mask_full); 

  do_OFDM_mod_rt(proc->subframe_tx, eNB);
}

void proc_tx_rru_if5(PHY_VARS_eNB *eNB,eNB_rxtx_proc_t *proc) {
knopp's avatar
knopp committed
505 506 507
  int offset = proc == &eNB->proc.proc_rxtx[0] ? 0 : 1;

  VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME( VCD_SIGNAL_DUMPER_VARIABLES_FRAME_NUMBER_TX0_ENB+offset, proc->frame_tx );
508
  VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME( VCD_SIGNAL_DUMPER_VARIABLES_SUBFRAME_NUMBER_TX0_ENB+offset, proc->subframe_tx );
509 510
  /// **** recv_IF5 of txdata from BBU **** ///       
  recv_IF5(eNB, &proc->timestamp_tx, proc->subframe_tx, IF5_RRH_GW_DL);
511 512
}

513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538
int wait_CCs(eNB_rxtx_proc_t *proc) {

  struct timespec wait;

  wait.tv_sec=0;
  wait.tv_nsec=5000000L;

  if (pthread_mutex_timedlock(&sync_phy_proc.mutex_phy_proc_tx,&wait) != 0) {
    LOG_E(PHY, "[SCHED][eNB] error locking PHY proc mutex for eNB TX\n");
    exit_fun("nothing to add");
    return(-1);
  }
  
  // wait for our turn or oai_exit
  while (sync_phy_proc.phy_proc_CC_id != proc->CC_id && !oai_exit) {
    pthread_cond_wait(&sync_phy_proc.cond_phy_proc_tx,
		      &sync_phy_proc.mutex_phy_proc_tx);
  }
  
  if (pthread_mutex_unlock(&sync_phy_proc.mutex_phy_proc_tx) != 0) {
    LOG_E(PHY, "[SCHED][eNB] error unlocking PHY proc mutex for eNB TX\n");
    exit_fun("nothing to add");
    return(-1);
  }
  return(0);
}
Sandeep Kumar's avatar
Sandeep Kumar committed
539

knopp's avatar
knopp committed
540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567
static inline int rxtx(PHY_VARS_eNB *eNB,eNB_rxtx_proc_t *proc, char *thread_name) {

  start_meas(&softmodem_stats_rxtx_sf);
  // ****************************************
  // Common RX procedures subframe n
  phy_procedures_eNB_common_RX(eNB);
  
  // UE-specific RX processing for subframe n
  if (eNB->proc_uespec_rx) eNB->proc_uespec_rx(eNB, proc, no_relay );
  
  // *****************************************
  // TX processing for subframe n+4
  // run PHY TX procedures the one after the other for all CCs to avoid race conditions
  // (may be relaxed in the future for performance reasons)
  // *****************************************
  if (wait_CCs(proc)<0) return(-1);
  
  if (oai_exit) return(-1);
  
  if (eNB->proc_tx)	eNB->proc_tx(eNB, proc, no_relay, NULL );
  
  if (release_thread(&proc->mutex_rxtx,&proc->instance_cnt_rxtx,thread_name)<0) return(-1);

  stop_meas( &softmodem_stats_rxtx_sf );
  
  return(0);
}

568
/*!
knopp's avatar
knopp committed
569
 * \brief The RX UE-specific and TX thread of eNB.
570 571 572
 * \param param is a \ref eNB_proc_t structure which contains the info what to process.
 * \returns a pointer to an int. The storage is not on the heap and must not be freed.
 */
Sandeep Kumar's avatar
Sandeep Kumar committed
573 574
static void* eNB_thread_rxtx( void* param ) {

knopp's avatar
knopp committed
575
  static int eNB_thread_rxtx_status;
576

knopp's avatar
knopp committed
577
  eNB_rxtx_proc_t *proc = (eNB_rxtx_proc_t*)param;
578 579
  PHY_VARS_eNB *eNB = PHY_vars_eNB_g[0][proc->CC_id];

knopp's avatar
knopp committed
580 581
  char thread_name[100];

582

583
  // set default return value
knopp's avatar
knopp committed
584
  eNB_thread_rxtx_status = 0;
585

knopp's avatar
knopp committed
586
  sprintf(thread_name,"RXn_TXnp4_%d\n",&eNB->proc.proc_rxtx[0] == proc ? 0 : 1);
587
  thread_top_init(thread_name,1,850000L,1000000L,2000000L);
588 589

  while (!oai_exit) {
knopp's avatar
knopp committed
590
    VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME( VCD_SIGNAL_DUMPER_FUNCTIONS_eNB_PROC_RXTX0+(proc->subframe_rx&1), 0 );
591

knopp's avatar
knopp committed
592
    if (wait_on_condition(&proc->mutex_rxtx,&proc->cond_rxtx,&proc->instance_cnt_rxtx,thread_name)<0) break;
593

knopp's avatar
knopp committed
594
    VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME( VCD_SIGNAL_DUMPER_FUNCTIONS_eNB_PROC_RXTX0+(proc->subframe_rx&1), 1 );
595

knopp's avatar
knopp committed
596
    
597
  
598 599
    if (oai_exit) break;

knopp's avatar
knopp committed
600
    if (rxtx(eNB,proc,thread_name) < 0) break;
601

knopp's avatar
knopp committed
602
  } // while !oai_exit
603

knopp's avatar
knopp committed
604
  VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME( VCD_SIGNAL_DUMPER_FUNCTIONS_eNB_PROC_RXTX0+(proc->subframe_rx&1), 0 );
605

Raymond Knopp's avatar
Raymond Knopp committed
606
  printf( "Exiting eNB thread RXn_TXnp4\n");
607

knopp's avatar
knopp committed
608 609
  eNB_thread_rxtx_status = 0;
  return &eNB_thread_rxtx_status;
610 611
}

612
#if defined(ENABLE_ITTI) && defined(ENABLE_USE_MME)
Sandeep Kumar's avatar
Sandeep Kumar committed
613 614 615
/* Wait for eNB application initialization to be complete (eNB registration to MME) */
static void wait_system_ready (char *message, volatile int *start_flag) {
  
616
  static char *indicator[] = {".    ", "..   ", "...  ", ".... ", ".....",
Sandeep Kumar's avatar
Sandeep Kumar committed
617
			      " ....", "  ...", "   ..", "    .", "     "};
618 619 620 621 622 623 624
  int i = 0;
  
  while ((!oai_exit) && (*start_flag == 0)) {
    LOG_N(EMU, message, indicator[i]);
    fflush(stdout);
    i = (i + 1) % (sizeof(indicator) / sizeof(indicator[0]));
    usleep(200000);
625
  }
626 627
  
  LOG_D(EMU,"\n");
628 629
}
#endif
630

knopp's avatar
knopp committed
631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775

// asynchronous UL with IF4p5 (RCC,RAU,eNodeB_BBU)
void fh_if5_asynch_UL(PHY_VARS_eNB *eNB,int *frame,int *subframe) {

  eNB_proc_t *proc       = &eNB->proc;
  LTE_DL_FRAME_PARMS *fp = &eNB->frame_parms;

  recv_IF5(eNB, &proc->timestamp_rx, *subframe, IF5_RRH_GW_UL); 

  proc->subframe_rx = (proc->timestamp_rx/fp->samples_per_tti)%10;
  proc->frame_rx    = (proc->timestamp_rx/(10*fp->samples_per_tti))&1023;

  if (proc->first_rx != 0) {
    proc->first_rx = 0;
    *subframe = proc->subframe_rx;
    *frame    = proc->frame_rx; 
  }
  else {
    if (proc->subframe_rx != *subframe) {
      LOG_E(PHY,"subframe_rx %d is not what we expect %d\n",proc->subframe_rx,*subframe);
      exit_fun("Exiting");
    }
    if (proc->frame_rx != *frame) {
      LOG_E(PHY,"subframe_rx %d is not what we expect %d\n",proc->frame_rx,*frame);  
      exit_fun("Exiting");
    }
  }
} // eNodeB_3GPP_BBU 

// asynchronous UL with IF4p5 (RCC,RAU,eNodeB_BBU)
void fh_if4p5_asynch_UL(PHY_VARS_eNB *eNB,int *frame,int *subframe) {

  LTE_DL_FRAME_PARMS *fp = &eNB->frame_parms;
  eNB_proc_t *proc       = &eNB->proc;

  uint16_t packet_type;
  uint32_t symbol_number,symbol_mask,symbol_mask_full,prach_rx;


  symbol_number = 0;
  symbol_mask = 0;
  symbol_mask_full = (1<<fp->symbols_per_tti)-1;
  prach_rx = 0;

  do {   // Blocking, we need a timeout on this !!!!!!!!!!!!!!!!!!!!!!!
    recv_IF4p5(eNB, &proc->frame_rx, &proc->subframe_rx, &packet_type, &symbol_number);
    if (proc->first_rx != 0) {
      *frame = proc->frame_rx;
      *subframe = proc->subframe_rx;
      proc->first_rx = 0;
    }
    else {
      if (proc->frame_rx != *frame) {
	LOG_E(PHY,"frame_rx %d is not what we expect %d\n",proc->frame_rx,*frame);
	exit_fun("Exiting");
      }
      if (proc->subframe_rx != *subframe) {
	LOG_E(PHY,"subframe_rx %d is not what we expect %d\n",proc->subframe_rx,*subframe);
	exit_fun("Exiting");
      }
    }
    if (packet_type == IF4p5_PULFFT) {
      symbol_mask = symbol_mask | (1<<symbol_number);
      prach_rx = (is_prach_subframe(fp, proc->frame_rx, proc->subframe_rx)>0) ? 1 : 0;                            
    } else if (packet_type == IF4p5_PRACH) {
      prach_rx = 0;
    }
  } while( (symbol_mask != symbol_mask_full) || (prach_rx == 1));    
  

} 


void fh_if5_asynch_DL(PHY_VARS_eNB *eNB,int *frame,int *subframe) {

  LTE_DL_FRAME_PARMS *fp = &eNB->frame_parms;
  eNB_proc_t *proc       = &eNB->proc;
  int subframe_tx,frame_tx;
  openair0_timestamp timestamp_tx;

  recv_IF5(eNB, &timestamp_tx, *subframe, IF5_RRH_GW_DL); 
      //      printf("Received subframe %d (TS %llu) from RCC\n",subframe_tx,timestamp_tx);

  subframe_tx = (timestamp_tx/fp->samples_per_tti)%10;
  frame_tx    = (timestamp_tx/(fp->samples_per_tti*10))&1023;

  if (proc->first_tx != 0) {
    *subframe = subframe_tx;
    *frame    = frame_tx;
    proc->first_tx = 0;
  }
  else {
    if (subframe_tx != *subframe) {
      LOG_E(PHY,"subframe_tx %d is not what we expect %d\n",subframe_tx,*subframe);
      exit_fun("Exiting");
    }
    if (frame_tx != *frame) { 
      LOG_E(PHY,"frame_tx %d is not what we expect %d\n",frame_tx,*frame);
      exit_fun("Exiting");
    }
  }
}

void fh_if4p5_asynch_DL(PHY_VARS_eNB *eNB,int *frame,int *subframe) {

  LTE_DL_FRAME_PARMS *fp = &eNB->frame_parms;
  eNB_proc_t *proc       = &eNB->proc;

  uint16_t packet_type;
  uint32_t symbol_number,symbol_mask,symbol_mask_full;
  int subframe_tx,frame_tx;

  symbol_number = 0;
  symbol_mask = 0;
  symbol_mask_full = (1<<fp->symbols_per_tti)-1;

  do {   // Blocking, we need a timeout on this !!!!!!!!!!!!!!!!!!!!!!!
    recv_IF4p5(eNB, &frame_tx, &subframe_tx, &packet_type, &symbol_number);
    if (proc->first_tx != 0) {
      *frame    = frame_tx;
      *subframe = subframe_tx;
      proc->first_tx = 0;
    }
    else {
      if (frame_tx != *frame) {
	LOG_E(PHY,"frame_tx %d is not what we expect %d\n",frame_tx,*frame);
	exit_fun("Exiting");
      }
      if (subframe_tx != *subframe) {
	LOG_E(PHY,"subframe_tx %d is not what we expect %d\n",subframe_tx,*subframe);
	exit_fun("Exiting");
      }
    }
    if (packet_type == IF4p5_PDLFFT) {
      symbol_mask = symbol_mask | (1<<symbol_number);
    }
    else {
      LOG_E(PHY,"Illegal IF4p5 packet type (should only be IF4p5_PDLFFT%d\n",packet_type);
      exit_fun("Exiting");
    }
  } while (symbol_mask != symbol_mask_full);    
  
  do_OFDM_mod_rt(subframe_tx, eNB);
} 

776
/*!
777
 * \brief The Asynchronous RX/TX FH thread of RAU/RCC/eNB/RRU.
778 779 780 781
 * This handles the RX FH for an asynchronous RRU/UE
 * \param param is a \ref eNB_proc_t structure which contains the info what to process.
 * \returns a pointer to an int. The storage is not on the heap and must not be freed.
 */
782
static void* eNB_thread_asynch_rxtx( void* param ) {
783

784
  static int eNB_thread_asynch_rxtx_status;
Raymond Knopp's avatar
Raymond Knopp committed
785

786 787
  eNB_proc_t *proc = (eNB_proc_t*)param;
  PHY_VARS_eNB *eNB = PHY_vars_eNB_g[0][proc->CC_id];
knopp's avatar
knopp committed
788 789


knopp's avatar
knopp committed
790
  int subframe=0, frame=0; 
791

792
  thread_top_init("thread_asynch",1,870000L,1000000L,1000000L);
793 794 795

  // wait for top-level synchronization and do one acquisition to get timestamp for setting frame/subframe

knopp's avatar
knopp committed
796
  wait_sync("thread_asynch");
797

798 799
  // wait for top-level synchronization and do one acquisition to get timestamp for setting frame/subframe
  printf( "waiting for devices (eNB_thread_asynch_rx)\n");
800

knopp's avatar
knopp committed
801
  wait_on_condition(&proc->mutex_asynch_rxtx,&proc->cond_asynch_rxtx,&proc->instance_cnt_asynch_rxtx,"thread_asynch");
802

803 804 805
  printf( "devices ok (eNB_thread_asynch_rx)\n");


knopp's avatar
knopp committed
806 807 808
  while (!oai_exit) { 
   
    if (oai_exit) break;   
809

knopp's avatar
knopp committed
810 811 812 813 814 815 816
    if (subframe==9) { 
      subframe=0;
      frame++;
      frame&=1023;
    } else {
      subframe++;
    }      
817

knopp's avatar
knopp committed
818 819 820
    if (eNB->fh_asynch) eNB->fh_asynch(eNB,&frame,&subframe);
    else AssertFatal(1==0, "Unknown eNB->node_function %d",eNB->node_function);
    
821
  }
822

823 824
  eNB_thread_asynch_rxtx_status=0;
  return(&eNB_thread_asynch_rxtx_status);
825
}
Sandeep Kumar's avatar
Sandeep Kumar committed
826

827

knopp's avatar
knopp committed
828 829 830 831 832 833



void rx_rf(PHY_VARS_eNB *eNB,int *frame,int *subframe) {

  eNB_proc_t *proc = &eNB->proc;
834 835 836 837
  LTE_DL_FRAME_PARMS *fp = &eNB->frame_parms;
  void *rxp[fp->nb_antennas_rx],*txp[fp->nb_antennas_tx]; 
  unsigned int rxs,txs;
  int i;
838
  int tx_sfoffset = 3;//(eNB->single_thread_flag == 1) ? 3 : 3;
839 840
  if (proc->first_rx==0) {
    
841
    // Transmit TX buffer based on timestamp from RX
842
    //    printf("trx_write -> USRP TS %llu (sf %d)\n", (proc->timestamp_rx+(3*fp->samples_per_tti)),(proc->subframe_rx+2)%10);
843
    VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME( VCD_SIGNAL_DUMPER_VARIABLES_TRX_TST, (proc->timestamp_rx+(tx_sfoffset*fp->samples_per_tti)-openair0_cfg[0].tx_sample_advance)&0xffffffff );
844 845 846 847
    VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME( VCD_SIGNAL_DUMPER_FUNCTIONS_TRX_WRITE, 1 );
    // prepare tx buffer pointers
	
    for (i=0; i<fp->nb_antennas_tx; i++)
848
      txp[i] = (void*)&eNB->common_vars.txdata[0][i][((proc->subframe_rx+tx_sfoffset)%10)*fp->samples_per_tti];
849 850
    
    txs = eNB->rfdevice.trx_write_func(&eNB->rfdevice,
851
				       proc->timestamp_rx+(tx_sfoffset*fp->samples_per_tti)-openair0_cfg[0].tx_sample_advance,
852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870
				       txp,
				       fp->samples_per_tti,
				       fp->nb_antennas_tx,
				       1);
    
    VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME( VCD_SIGNAL_DUMPER_FUNCTIONS_TRX_WRITE, 0 );
    
    
    
    if (txs !=  fp->samples_per_tti) {
      LOG_E(PHY,"TX : Timeout (sent %d/%d)\n",txs, fp->samples_per_tti);
      exit_fun( "problem transmitting samples" );
    }	
  }
  
  for (i=0; i<fp->nb_antennas_rx; i++)
    rxp[i] = (void*)&eNB->common_vars.rxdata[0][i][*subframe*fp->samples_per_tti];
  
  VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME( VCD_SIGNAL_DUMPER_FUNCTIONS_TRX_READ, 1 );
871

872 873 874 875 876
  rxs = eNB->rfdevice.trx_read_func(&eNB->rfdevice,
				    &(proc->timestamp_rx),
				    rxp,
				    fp->samples_per_tti,
				    fp->nb_antennas_rx);
Raymond Knopp's avatar
Raymond Knopp committed
877 878

  VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME( VCD_SIGNAL_DUMPER_FUNCTIONS_TRX_READ, 0 );
879 880 881
  
  proc->frame_rx    = (proc->timestamp_rx / (fp->samples_per_tti*10))&1023;
  proc->subframe_rx = (proc->timestamp_rx / fp->samples_per_tti)%10;
882
  //  printf("trx_read <- USRP TS %llu (sf %d, first_rx %d)\n", proc->timestamp_rx,proc->subframe_rx,proc->first_rx);  
883 884 885
  
  if (proc->first_rx == 0) {
    if (proc->subframe_rx != *subframe){
knopp's avatar
knopp committed
886
      LOG_E(PHY,"Received Timestamp doesn't correspond to the time we think it is (proc->subframe_rx %d, subframe %d)\n",proc->subframe_rx,*subframe);
887 888 889 890
      exit_fun("Exiting");
    }
    
    if (proc->frame_rx != *frame) {
knopp's avatar
knopp committed
891
      LOG_E(PHY,"Received Timestamp doesn't correspond to the time we think it is (proc->frame_rx %d frame %d)\n",proc->frame_rx,*frame);
892 893 894 895 896 897 898 899 900 901 902 903
      exit_fun("Exiting");
    }
  } else {
    proc->first_rx = 0;
    *frame = proc->frame_rx;
    *subframe = proc->subframe_rx;        
  }
  
  //printf("timestamp_rx %lu, frame %d(%d), subframe %d(%d)\n",proc->timestamp_rx,proc->frame_rx,frame,proc->subframe_rx,subframe);
  
  VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME( VCD_SIGNAL_DUMPER_VARIABLES_TRX_TS, proc->timestamp_rx&0xffffffff );
  
Raymond Knopp's avatar
Raymond Knopp committed
904 905 906 907 908
  if (rxs != fp->samples_per_tti)
    exit_fun( "problem receiving samples" );
  

  
909 910
}

knopp's avatar
knopp committed
911
void rx_fh_if5(PHY_VARS_eNB *eNB,int *frame, int *subframe) {
912 913

  LTE_DL_FRAME_PARMS *fp = &eNB->frame_parms;
knopp's avatar
knopp committed
914
  eNB_proc_t *proc = &eNB->proc;
915 916 917 918 919 920 921

  recv_IF5(eNB, &proc->timestamp_rx, *subframe, IF5_RRH_GW_UL); 

  proc->frame_rx    = (proc->timestamp_rx / (fp->samples_per_tti*10))&1023;
  proc->subframe_rx = (proc->timestamp_rx / fp->samples_per_tti)%10;
  
  if (proc->first_rx == 0) {
Raymond Knopp's avatar
Raymond Knopp committed
922
    if (proc->subframe_rx != *subframe){
923 924 925 926
      LOG_E(PHY,"Received Timestamp doesn't correspond to the time we think it is (proc->subframe_rx %d, subframe %d)\n",proc->subframe_rx,subframe);
      exit_fun("Exiting");
    }
    
Raymond Knopp's avatar
Raymond Knopp committed
927
    if (proc->frame_rx != *frame) {
928 929 930 931 932
      LOG_E(PHY,"Received Timestamp doesn't correspond to the time we think it is (proc->frame_rx %d frame %d)\n",proc->frame_rx,frame);
      exit_fun("Exiting");
    }
  } else {
    proc->first_rx = 0;
Raymond Knopp's avatar
Raymond Knopp committed
933 934
    *frame = proc->frame_rx;
    *subframe = proc->subframe_rx;        
935 936 937 938 939 940
  }      
  
  VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME( VCD_SIGNAL_DUMPER_VARIABLES_TRX_TS, proc->timestamp_rx&0xffffffff );

}

knopp's avatar
knopp committed
941

942
void rx_fh_if4p5(PHY_VARS_eNB *eNB,int *frame,int *subframe) {
943 944

  LTE_DL_FRAME_PARMS *fp = &eNB->frame_parms;
945
  eNB_proc_t *proc = &eNB->proc;
946 947 948 949 950 951 952 953 954 955

  int prach_rx;

  uint16_t packet_type;
  uint32_t symbol_number=0;
  uint32_t symbol_mask, symbol_mask_full;

  symbol_mask = 0;
  symbol_mask_full = (1<<fp->symbols_per_tti)-1;
  prach_rx = 0;
Raymond Knopp's avatar
Raymond Knopp committed
956

957 958
  do {   // Blocking, we need a timeout on this !!!!!!!!!!!!!!!!!!!!!!!
    recv_IF4p5(eNB, &proc->frame_rx, &proc->subframe_rx, &packet_type, &symbol_number);
959

960 961 962 963 964 965
    if (packet_type == IF4p5_PULFFT) {
      symbol_mask = symbol_mask | (1<<symbol_number);
      prach_rx = (is_prach_subframe(fp, proc->frame_rx, proc->subframe_rx)>0) ? 1 : 0;                            
    } else if (packet_type == IF4p5_PRACH) {
      prach_rx = 0;
    }
Raymond Knopp's avatar
Raymond Knopp committed
966

967 968 969 970
  } while( (symbol_mask != symbol_mask_full) || (prach_rx == 1));    
  
  if (proc->first_rx == 0) {
    if (proc->subframe_rx != *subframe){
Raymond Knopp's avatar
Raymond Knopp committed
971
      LOG_E(PHY,"Received Timestamp doesn't correspond to the time we think it is (proc->subframe_rx %d, subframe %d)\n",proc->subframe_rx,*subframe);
972 973 974
      exit_fun("Exiting");
    }
    if (proc->frame_rx != *frame) {
Raymond Knopp's avatar
Raymond Knopp committed
975
      LOG_E(PHY,"Received Timestamp doesn't correspond to the time we think it is (proc->frame_rx %d frame %d)\n",proc->frame_rx,*frame);
976 977 978 979 980 981 982 983 984 985 986 987
      exit_fun("Exiting");
    }
  } else {
    proc->first_rx = 0;
    *frame = proc->frame_rx;
    *subframe = proc->subframe_rx;        
  }
  
  VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME( VCD_SIGNAL_DUMPER_VARIABLES_TRX_TS, proc->timestamp_rx&0xffffffff );
  
}

knopp's avatar
knopp committed
988 989
void rx_fh_slave(PHY_VARS_eNB *eNB,int *frame,int *subframe) {
  // This case is for synchronization to another thread
990
  // it just waits for an external event.  The actual rx_fh is handle by the asynchronous RX thread
knopp's avatar
knopp committed
991 992
  eNB_proc_t *proc=&eNB->proc;

knopp's avatar
knopp committed
993 994 995 996 997
  if (wait_on_condition(&proc->mutex_FH,&proc->cond_FH,&proc->instance_cnt_FH,"rx_fh_slave") < 0)
    return;

  release_thread(&proc->mutex_FH,&proc->instance_cnt_FH,"rx_fh_slave");

knopp's avatar
knopp committed
998 999 1000 1001
  
}


1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033
int wakeup_rxtx(eNB_proc_t *proc,eNB_rxtx_proc_t *proc_rxtx,LTE_DL_FRAME_PARMS *fp) {

  int i;
  struct timespec wait;
  
  wait.tv_sec=0;
  wait.tv_nsec=5000000L;

  /* accept some delay in processing - up to 5ms */
  for (i = 0; i < 10 && proc_rxtx->instance_cnt_rxtx == 0; i++) {
    LOG_W( PHY,"[eNB] Frame %d, eNB RXn-TXnp4 thread busy!! (cnt_rxtx %i)\n", proc_rxtx->frame_tx, proc_rxtx->instance_cnt_rxtx);
    usleep(500);
  }
  if (proc_rxtx->instance_cnt_rxtx == 0) {
    exit_fun( "TX thread busy" );
    return(-1);
  }

  // wake up TX for subframe n+4
  // lock the TX mutex and make sure the thread is ready
  if (pthread_mutex_timedlock(&proc_rxtx->mutex_rxtx,&wait) != 0) {
    LOG_E( PHY, "[eNB] ERROR pthread_mutex_lock for eNB RXTX thread %d (IC %d)\n", proc_rxtx->subframe_rx&1,proc_rxtx->instance_cnt_rxtx );
    exit_fun( "error locking mutex_rxtx" );
    return(-1);
  }
  
  ++proc_rxtx->instance_cnt_rxtx;
  
  // We have just received and processed the common part of a subframe, say n. 
  // TS_rx is the last received timestamp (start of 1st slot), TS_tx is the desired 
  // transmitted timestamp of the next TX slot (first).
  // The last (TS_rx mod samples_per_frame) was n*samples_per_tti, 
knopp's avatar
knopp committed
1034 1035
  // we want to generate subframe (n+4), so TS_tx = TX_rx+4*samples_per_tti,
  // and proc->subframe_tx = proc->subframe_rx+4
1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086
  proc_rxtx->timestamp_tx = proc->timestamp_rx + (4*fp->samples_per_tti);
  proc_rxtx->frame_rx     = proc->frame_rx;
  proc_rxtx->subframe_rx  = proc->subframe_rx;
  proc_rxtx->frame_tx     = (proc_rxtx->subframe_rx > 5) ? (proc_rxtx->frame_rx+1)&1023 : proc_rxtx->frame_rx;
  proc_rxtx->subframe_tx  = (proc_rxtx->subframe_rx + 4)%10;
  
  // the thread can now be woken up
  if (pthread_cond_signal(&proc_rxtx->cond_rxtx) != 0) {
    LOG_E( PHY, "[eNB] ERROR pthread_cond_signal for eNB RXn-TXnp4 thread\n");
    exit_fun( "ERROR pthread_cond_signal" );
    return(-1);
  }
  
  pthread_mutex_unlock( &proc_rxtx->mutex_rxtx );

  return(0);
}

void wakeup_slaves(eNB_proc_t *proc) {

  int i;
  struct timespec wait;
  
  wait.tv_sec=0;
  wait.tv_nsec=5000000L;
  
  for (i=0;i<proc->num_slaves;i++) {
    eNB_proc_t *slave_proc = proc->slave_proc[i];
    // wake up slave FH thread
    // lock the FH mutex and make sure the thread is ready
    if (pthread_mutex_timedlock(&slave_proc->mutex_FH,&wait) != 0) {
      LOG_E( PHY, "[eNB] ERROR pthread_mutex_lock for eNB CCid %d slave CCid %d (IC %d)\n",proc->CC_id,slave_proc->CC_id);
      exit_fun( "error locking mutex_rxtx" );
      break;
    }
    
    int cnt_slave            = ++slave_proc->instance_cnt_FH;
    slave_proc->frame_rx     = proc->frame_rx;
    slave_proc->subframe_rx  = proc->subframe_rx;
    slave_proc->timestamp_rx = proc->timestamp_rx;
    
    pthread_mutex_unlock( &slave_proc->mutex_FH );
    
    if (cnt_slave == 0) {
      // the thread was presumably waiting where it should and can now be woken up
      if (pthread_cond_signal(&slave_proc->cond_FH) != 0) {
	LOG_E( PHY, "[eNB] ERROR pthread_cond_signal for eNB CCid %d, slave CCid %d\n",proc->CC_id,slave_proc->CC_id);
          exit_fun( "ERROR pthread_cond_signal" );
	  break;
      }
    } else {
1087
      LOG_W( PHY,"[eNB] Frame %d, slave CC_id %d thread busy!! (cnt_FH %i)\n",slave_proc->frame_rx,slave_proc->CC_id, cnt_slave);
1088 1089 1090 1091 1092 1093
      exit_fun( "FH thread busy" );
      break;
    }             
  }
}

1094
/*!
1095 1096 1097
 * \brief The Fronthaul thread of RRU/RAU/RCC/eNB
 * In the case of RRU/eNB, handles interface with external RF
 * In the case of RAU/RCC, handles fronthaul interface with RRU/RAU
1098 1099 1100
 * \param param is a \ref eNB_proc_t structure which contains the info what to process.
 * \returns a pointer to an int. The storage is not on the heap and must not be freed.
 */
knopp's avatar
knopp committed
1101

1102
static void* eNB_thread_FH( void* param ) {
Sandeep Kumar's avatar
Sandeep Kumar committed
1103
  
1104
  static int eNB_thread_FH_status;
1105 1106

  eNB_proc_t *proc = (eNB_proc_t*)param;
1107 1108
  PHY_VARS_eNB *eNB = PHY_vars_eNB_g[0][proc->CC_id];
  LTE_DL_FRAME_PARMS *fp = &eNB->frame_parms;
1109

Sandeep Kumar's avatar
Sandeep Kumar committed
1110
  int subframe=0, frame=0; 
1111

1112
  // set default return value
1113
  eNB_thread_FH_status = 0;
1114

1115
  thread_top_init("eNB_thread_FH",0,870000,1000000,1000000);
1116

knopp's avatar
knopp committed
1117
  wait_sync("eNB_thread_FH");
1118

1119
#if defined(ENABLE_ITTI) && defined(ENABLE_USE_MME)
knopp's avatar
knopp committed
1120 1121
  if (eNB->node_function < NGFI_RRU_IF5)
    wait_system_ready ("Waiting for eNB application to be ready %s\r", &start_eNB);
1122
#endif 
1123

1124 1125 1126
  // Start IF device if any
  if (eNB->start_if) 
    if (eNB->start_if(eNB) != 0)
1127
      LOG_E(HW,"Could not start the IF device\n");
1128

knopp's avatar
knopp committed
1129 1130 1131 1132 1133
  // Start RF device if any
  if (eNB->start_rf)
    if (eNB->start_rf(eNB) != 0)
      LOG_E(HW,"Could not start the RF device\n");

knopp's avatar
knopp committed
1134
  // wakeup asnych_rxtx thread because the devices are ready at this point
1135 1136 1137 1138 1139
  pthread_mutex_lock(&proc->mutex_asynch_rxtx);
  proc->instance_cnt_asynch_rxtx=0;
  pthread_mutex_unlock(&proc->mutex_asynch_rxtx);
  pthread_cond_signal(&proc->cond_asynch_rxtx);

Sandeep Kumar's avatar
Sandeep Kumar committed
1140 1141
  // This is a forever while loop, it loops over subframes which are scheduled by incoming samples from HW devices
  while (!oai_exit) {
Raymond Knopp's avatar
Raymond Knopp committed
1142

knopp's avatar
knopp committed
1143 1144
    // these are local subframe/frame counters to check that we are in synch with the fronthaul timing.
    // They are set on the first rx/tx in the underly FH routines.
1145 1146 1147 1148 1149 1150 1151 1152
    if (subframe==9) { 
      subframe=0;
      frame++;
      frame&=1023;
    } else {
      subframe++;
    }      

knopp's avatar
knopp committed
1153 1154 1155 1156
 
    // synchronization on FH interface, acquire signals/data and block
    if (eNB->rx_fh) eNB->rx_fh(eNB,&frame,&subframe);
    else AssertFatal(1==0, "No fronthaul interface : eNB->node_function %d",eNB->node_function);
1157

Cedric Roux's avatar
Cedric Roux committed
1158 1159
    T(T_ENB_MASTER_TICK, T_INT(0), T_INT(proc->frame_rx), T_INT(proc->subframe_rx));

1160 1161
    // At this point, all information for subframe has been received on FH interface
    // If this proc is to provide synchronization, do so
1162
    wakeup_slaves(proc);
1163 1164
      
    // wake up RXn_TXnp4 thread for the subframe
Sandeep Kumar's avatar
Sandeep Kumar committed
1165
    // choose even or odd thread for RXn-TXnp4 processing 
1166
    if (wakeup_rxtx(proc,&proc->proc_rxtx[proc->subframe_rx&1],fp) < 0)
1167
      break;
knopp's avatar
knopp committed
1168

knopp's avatar
knopp committed
1169
    // artifical sleep for very slow fronthaul
1170 1171
    if (eNB->frame_parms.N_RB_DL==6)
      rt_sleep_ns(800000LL);
1172 1173 1174
  }
    
  printf( "Exiting FH thread \n");
knopp's avatar
knopp committed
1175
 
1176 1177
  eNB_thread_FH_status = 0;
  return &eNB_thread_FH_status;
1178 1179 1180 1181 1182 1183 1184 1185
}


/*!
 * \brief The prach receive thread of eNB.
 * \param param is a \ref eNB_proc_t structure which contains the info what to process.
 * \returns a pointer to an int. The storage is not on the heap and must not be freed.
 */
Sandeep Kumar's avatar
Sandeep Kumar committed
1186
static void* eNB_thread_prach( void* param ) {
1187 1188 1189 1190
  static int eNB_thread_prach_status;

  eNB_proc_t *proc = (eNB_proc_t*)param;
  PHY_VARS_eNB *eNB= PHY_vars_eNB_g[0][proc->CC_id];