lte-ru.c 74.9 KB
Newer Older
Raymond Knopp's avatar
Raymond Knopp committed
1 2 3
/*******************************************************************************
    OpenAirInterface
    Copyright(c) 1999 - 2014 Eurecom
4
 
Raymond Knopp's avatar
Raymond Knopp committed
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
    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


#include "../../ARCH/COMMON/common_lib.h"
68
#include "../../ARCH/ETHERNET/USERSPACE/LIB/ethernet_lib.h"
Raymond Knopp's avatar
Raymond Knopp committed
69 70 71 72 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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115

#include "PHY/LTE_TRANSPORT/if4_tools.h"
#include "PHY/LTE_TRANSPORT/if5_tools.h"

#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

#include "T.h"

extern volatile int                    oai_exit;


116 117
extern void  phy_init_RU(RU_t*);

Raymond Knopp's avatar
Raymond Knopp committed
118
void init_RU(char*);
Raymond Knopp's avatar
Raymond Knopp committed
119
void stop_RU(RU_t *ru);
120
void do_ru_sync(RU_t *ru);
Raymond Knopp's avatar
Raymond Knopp committed
121

122 123 124 125 126 127 128
void configure_ru(int idx,
		  void *arg);

void configure_rru(int idx,
		   void *arg);

int attach_rru(RU_t *ru);
Raymond Knopp's avatar
Raymond Knopp committed
129

130
int connect_rau(RU_t *ru);
Raymond Knopp's avatar
Raymond Knopp committed
131

132

133 134 135
/*************************************************************/
/* Functions to attach and configure RRU                     */

Raymond Knopp's avatar
Raymond Knopp committed
136
extern void wait_eNBs(void);
137

138 139 140 141 142 143
int attach_rru(RU_t *ru) {
  
  ssize_t      msg_len,len;
  RRU_CONFIG_msg_t rru_config_msg;
  int received_capabilities=0;

Raymond Knopp's avatar
Raymond Knopp committed
144
  wait_eNBs();
145 146 147
  // Wait for capabilities
  while (received_capabilities==0) {
    
148
    memset((void*)&rru_config_msg,0,sizeof(rru_config_msg));
149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195
    rru_config_msg.type = RAU_tick; 
    rru_config_msg.len  = sizeof(RRU_CONFIG_msg_t)-MAX_RRU_CONFIG_SIZE;
    LOG_I(PHY,"Sending RAU tick to RRU %d\n",ru->idx);
    AssertFatal((ru->ifdevice.trx_ctlsend_func(&ru->ifdevice,&rru_config_msg,rru_config_msg.len)!=-1),
		"RU %d cannot access remote radio\n",ru->idx);

    msg_len  = sizeof(RRU_CONFIG_msg_t)-MAX_RRU_CONFIG_SIZE+sizeof(RRU_capabilities_t);

    // wait for answer with timeout  
    if ((len = ru->ifdevice.trx_ctlrecv_func(&ru->ifdevice,
					     &rru_config_msg,
					     msg_len))<0) {
      LOG_I(PHY,"Waiting for RRU %d\n",ru->idx);     
    }
    else if (rru_config_msg.type == RRU_capabilities) {
      AssertFatal(rru_config_msg.len==msg_len,"Received capabilities with incorrect length (%d!=%d)\n",(int)rru_config_msg.len,(int)msg_len);
      LOG_I(PHY,"Received capabilities from RRU %d (len %d/%d, num_bands %d,max_pdschReferenceSignalPower %d, max_rxgain %d, nb_tx %d, nb_rx %d)\n",ru->idx,
	    (int)rru_config_msg.len,(int)msg_len,
	     ((RRU_capabilities_t*)&rru_config_msg.msg[0])->num_bands,
	     ((RRU_capabilities_t*)&rru_config_msg.msg[0])->max_pdschReferenceSignalPower[0],
	     ((RRU_capabilities_t*)&rru_config_msg.msg[0])->max_rxgain[0],
	     ((RRU_capabilities_t*)&rru_config_msg.msg[0])->nb_tx[0],
	     ((RRU_capabilities_t*)&rru_config_msg.msg[0])->nb_rx[0]);
      received_capabilities=1;
    }
    else {
      LOG_E(PHY,"Received incorrect message %d from RRU %d\n",rru_config_msg.type,ru->idx); 
    }
  }
  configure_ru(ru->idx,
	       (RRU_capabilities_t *)&rru_config_msg.msg[0]);
		    
  rru_config_msg.type = RRU_config;
  rru_config_msg.len  = sizeof(RRU_CONFIG_msg_t)-MAX_RRU_CONFIG_SIZE+sizeof(RRU_config_t);
  LOG_I(PHY,"Sending Configuration to RRU %d (num_bands %d,band0 %d,txfreq %u,rxfreq %u,att_tx %d,att_rx %d,N_RB_DL %d,N_RB_UL %d,3/4FS %d, prach_FO %d, prach_CI %d)\n",ru->idx,
	((RRU_config_t *)&rru_config_msg.msg[0])->num_bands,
	((RRU_config_t *)&rru_config_msg.msg[0])->band_list[0],
	((RRU_config_t *)&rru_config_msg.msg[0])->tx_freq[0],
	((RRU_config_t *)&rru_config_msg.msg[0])->rx_freq[0],
	((RRU_config_t *)&rru_config_msg.msg[0])->att_tx[0],
	((RRU_config_t *)&rru_config_msg.msg[0])->att_rx[0],
	((RRU_config_t *)&rru_config_msg.msg[0])->N_RB_DL[0],
	((RRU_config_t *)&rru_config_msg.msg[0])->N_RB_UL[0],
	((RRU_config_t *)&rru_config_msg.msg[0])->threequarter_fs[0],
	((RRU_config_t *)&rru_config_msg.msg[0])->prach_FreqOffset[0],
	((RRU_config_t *)&rru_config_msg.msg[0])->prach_ConfigIndex[0]);

196

197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254
  AssertFatal((ru->ifdevice.trx_ctlsend_func(&ru->ifdevice,&rru_config_msg,rru_config_msg.len)!=-1),
	      "RU %d failed send configuration to remote radio\n",ru->idx);

  return 0;
}

int connect_rau(RU_t *ru) {

  RRU_CONFIG_msg_t   rru_config_msg;
  ssize_t	     msg_len;
  int                tick_received          = 0;
  int                configuration_received = 0;
  RRU_capabilities_t *cap;
  int                i;
  int                len;

  // wait for RAU_tick
  while (tick_received == 0) {

    msg_len  = sizeof(RRU_CONFIG_msg_t)-MAX_RRU_CONFIG_SIZE;

    if ((len = ru->ifdevice.trx_ctlrecv_func(&ru->ifdevice,
					     &rru_config_msg,
					     msg_len))<0) {
      LOG_I(PHY,"Waiting for RAU\n");     
    }
    else {
      if (rru_config_msg.type == RAU_tick) {
	LOG_I(PHY,"Tick received from RAU\n");
	tick_received = 1;
      }
      else LOG_E(PHY,"Received erroneous message (%d)from RAU, expected RAU_tick\n",rru_config_msg.type);
    }
  }

  // send capabilities

  rru_config_msg.type = RRU_capabilities; 
  rru_config_msg.len  = sizeof(RRU_CONFIG_msg_t)-MAX_RRU_CONFIG_SIZE+sizeof(RRU_capabilities_t);
  cap                 = (RRU_capabilities_t*)&rru_config_msg.msg[0];
  LOG_I(PHY,"Sending Capabilities (len %d, num_bands %d,max_pdschReferenceSignalPower %d, max_rxgain %d, nb_tx %d, nb_rx %d)\n",
	(int)rru_config_msg.len,ru->num_bands,ru->max_pdschReferenceSignalPower,ru->max_rxgain,ru->nb_tx,ru->nb_rx);
  switch (ru->function) {
  case NGFI_RRU_IF4p5:
    cap->FH_fmt                                   = OAI_IF4p5_only;
    break;
  case NGFI_RRU_IF5:
    cap->FH_fmt                                   = OAI_IF5_only;
    break;
  case MBP_RRU_IF5:
    cap->FH_fmt                                   = MBP_IF5;
    break;
  default:
    AssertFatal(1==0,"RU_function is unknown %d\n",RC.ru[0]->function);
    break;
  }
  cap->num_bands                                  = ru->num_bands;
  for (i=0;i<ru->num_bands;i++) {
255 256
	LOG_I(PHY,"Band %d: nb_rx %d nb_tx %d pdschReferenceSignalPower %d rxgain %d\n",
	ru->band[i],ru->nb_rx,ru->nb_tx,ru->max_pdschReferenceSignalPower,ru->max_rxgain);
257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295
    cap->band_list[i]                             = ru->band[i];
    cap->nb_rx[i]                                 = ru->nb_rx;
    cap->nb_tx[i]                                 = ru->nb_tx;
    cap->max_pdschReferenceSignalPower[i]         = ru->max_pdschReferenceSignalPower;
    cap->max_rxgain[i]                            = ru->max_rxgain;
  }
  AssertFatal((ru->ifdevice.trx_ctlsend_func(&ru->ifdevice,&rru_config_msg,rru_config_msg.len)!=-1),
	      "RU %d failed send capabilities to RAU\n",ru->idx);

  // wait for configuration
  rru_config_msg.len  = sizeof(RRU_CONFIG_msg_t)-MAX_RRU_CONFIG_SIZE+sizeof(RRU_config_t);
  while (configuration_received == 0) {

    if ((len = ru->ifdevice.trx_ctlrecv_func(&ru->ifdevice,
					     &rru_config_msg,
					     rru_config_msg.len))<0) {
      LOG_I(PHY,"Waiting for configuration from RAU\n");     
    }    
    else {
      LOG_I(PHY,"Configuration received from RAU  (num_bands %d,band0 %d,txfreq %u,rxfreq %u,att_tx %d,att_rx %d,N_RB_DL %d,N_RB_UL %d,3/4FS %d, prach_FO %d, prach_CI %d)\n",
	    ((RRU_config_t *)&rru_config_msg.msg[0])->num_bands,
	    ((RRU_config_t *)&rru_config_msg.msg[0])->band_list[0],
	    ((RRU_config_t *)&rru_config_msg.msg[0])->tx_freq[0],
	    ((RRU_config_t *)&rru_config_msg.msg[0])->rx_freq[0],
	    ((RRU_config_t *)&rru_config_msg.msg[0])->att_tx[0],
	    ((RRU_config_t *)&rru_config_msg.msg[0])->att_rx[0],
	    ((RRU_config_t *)&rru_config_msg.msg[0])->N_RB_DL[0],
	    ((RRU_config_t *)&rru_config_msg.msg[0])->N_RB_UL[0],
	    ((RRU_config_t *)&rru_config_msg.msg[0])->threequarter_fs[0],
	    ((RRU_config_t *)&rru_config_msg.msg[0])->prach_FreqOffset[0],
	    ((RRU_config_t *)&rru_config_msg.msg[0])->prach_ConfigIndex[0]);
      
      configure_rru(ru->idx,
		    (void*)&rru_config_msg.msg[0]);
      configuration_received = 1;
    }
  }
  return 0;
}
Raymond Knopp's avatar
Raymond Knopp committed
296 297 298 299 300
/*************************************************************/
/* Southbound Fronthaul functions, RCC/RAU                   */

// southbound IF5 fronthaul for 16-bit OAI format
static inline void fh_if5_south_out(RU_t *ru) {
301 302
  if (ru == RC.ru[0]) VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME( VCD_SIGNAL_DUMPER_VARIABLES_TRX_TST, ru->proc.timestamp_tx&0xffffffff );
  send_IF5(ru, ru->proc.timestamp_tx, ru->proc.subframe_tx, &ru->seqno, IF5_RRH_GW_DL);
Raymond Knopp's avatar
Raymond Knopp committed
303 304 305 306
}

// southbound IF5 fronthaul for Mobipass packet format
static inline void fh_if5_mobipass_south_out(RU_t *ru) {
307 308
  if (ru == RC.ru[0]) VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME( VCD_SIGNAL_DUMPER_VARIABLES_TRX_TST, ru->proc.timestamp_tx&0xffffffff );
  send_IF5(ru, ru->proc.timestamp_tx, ru->proc.subframe_tx, &ru->seqno, IF5_MOBIPASS); 
Raymond Knopp's avatar
Raymond Knopp committed
309 310 311 312
}

// southbound IF4p5 fronthaul
static inline void fh_if4p5_south_out(RU_t *ru) {
313
  if (ru == RC.ru[0]) VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME( VCD_SIGNAL_DUMPER_VARIABLES_TRX_TST, ru->proc.timestamp_tx&0xffffffff );
314
  LOG_D(PHY,"Sending IF4p5 for frame %d subframe %d\n",ru->proc.frame_tx,ru->proc.subframe_tx);
315 316
  if (subframe_select(&ru->frame_parms,ru->proc.subframe_tx)!=SF_UL) 
    send_IF4p5(ru,ru->proc.frame_tx, ru->proc.subframe_tx, IF4p5_PDLFFT);
Raymond Knopp's avatar
Raymond Knopp committed
317 318 319 320 321 322 323 324 325
}

/*************************************************************/
/* Input Fronthaul from south RCC/RAU                        */

// Synchronous if5 from south 
void fh_if5_south_in(RU_t *ru,int *frame, int *subframe) {

  LTE_DL_FRAME_PARMS *fp = &ru->frame_parms;
326
  RU_proc_t *proc = &ru->proc;
Raymond Knopp's avatar
Raymond Knopp committed
327

328
  recv_IF5(ru, &proc->timestamp_rx, *subframe, IF5_RRH_GW_UL); 
Raymond Knopp's avatar
Raymond Knopp committed
329 330 331 332 333 334

  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) {
    if (proc->subframe_rx != *subframe){
335
      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);
Raymond Knopp's avatar
Raymond Knopp committed
336 337 338 339
      exit_fun("Exiting");
    }
    
    if (proc->frame_rx != *frame) {
340
      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);
Raymond Knopp's avatar
Raymond Knopp committed
341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356
      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 );

}

// Synchronous if4p5 from south 
void fh_if4p5_south_in(RU_t *ru,int *frame,int *subframe) {

  LTE_DL_FRAME_PARMS *fp = &ru->frame_parms;
357 358
  RU_proc_t *proc = &ru->proc;
  int f,sf;
Raymond Knopp's avatar
Raymond Knopp committed
359 360 361 362


  uint16_t packet_type;
  uint32_t symbol_number=0;
363 364 365 366 367 368
  uint32_t symbol_mask_full;

  if ((fp->frame_type == TDD) && (subframe_select(fp,*subframe)==SF_S))  
    symbol_mask_full = (1<<fp->ul_symbols_in_S_subframe)-1;   
  else     
    symbol_mask_full = (1<<fp->symbols_per_tti)-1; 
Raymond Knopp's avatar
Raymond Knopp committed
369

370
  AssertFatal(proc->symbol_mask[*subframe]==0,"rx_fh_if4p5: proc->symbol_mask[%d] = %x\n",*subframe,proc->symbol_mask[*subframe]);
Raymond Knopp's avatar
Raymond Knopp committed
371
  do {   // Blocking, we need a timeout on this !!!!!!!!!!!!!!!!!!!!!!!
372
    recv_IF4p5(ru, &f, &sf, &packet_type, &symbol_number);
Raymond Knopp's avatar
Raymond Knopp committed
373

374 375 376 377
    if (packet_type == IF4p5_PULFFT) proc->symbol_mask[sf] = proc->symbol_mask[sf] | (1<<symbol_number);
    else if (packet_type == IF4p5_PULTICK) {           
      if ((proc->first_rx==0) && (f!=*frame)) LOG_E(PHY,"rx_fh_if4p5: PULTICK received frame %d != expected %d\n",f,*frame);       
      if ((proc->first_rx==0) && (sf!=*subframe)) LOG_E(PHY,"rx_fh_if4p5: PULTICK received subframe %d != expected %d (first_rx %d)\n",sf,*subframe,proc->first_rx);       
378
      break;     
379
      
Raymond Knopp's avatar
Raymond Knopp committed
380
    } else if (packet_type == IF4p5_PRACH) {
381
      // nothing in RU for RAU
Raymond Knopp's avatar
Raymond Knopp committed
382
    }
383
    LOG_D(PHY,"rx_fh_if4p5: subframe %d symbol mask %x\n",*subframe,proc->symbol_mask[*subframe]);
384
  } while(proc->symbol_mask[*subframe] != symbol_mask_full);    
Raymond Knopp's avatar
Raymond Knopp committed
385 386

  //caculate timestamp_rx, timestamp_tx based on frame and subframe
387 388
  proc->subframe_rx  = sf;
  proc->frame_rx     = f;
389
  proc->timestamp_rx = ((proc->frame_rx * 10)  + proc->subframe_rx ) * fp->samples_per_tti ;
390 391 392
  //  proc->timestamp_tx = proc->timestamp_rx +  (4*fp->samples_per_tti);
  proc->subframe_tx  = (sf+4)%10;
  proc->frame_tx     = (sf>5) ? (f+1)&1023 : f;
Raymond Knopp's avatar
Raymond Knopp committed
393 394 395 396 397 398 399 400 401 402 403 404 405 406 407
 
  if (proc->first_rx == 0) {
    if (proc->subframe_rx != *subframe){
      LOG_E(PHY,"Received Timestamp (IF4p5) doesn't correspond to the time we think it is (proc->subframe_rx %d, subframe %d)\n",proc->subframe_rx,*subframe);
      exit_fun("Exiting");
    }
    if (proc->frame_rx != *frame) {
      LOG_E(PHY,"Received Timestamp (IF4p5) 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;
    *frame = proc->frame_rx;
    *subframe = proc->subframe_rx;        
  }
408

409 410 411 412 413 414 415
  if (ru == RC.ru[0]) {
    VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME( VCD_SIGNAL_DUMPER_VARIABLES_FRAME_NUMBER_RX0_RU, f );
    VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME( VCD_SIGNAL_DUMPER_VARIABLES_SUBFRAME_NUMBER_RX0_RU, sf );
    VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME( VCD_SIGNAL_DUMPER_VARIABLES_FRAME_NUMBER_TX0_RU, proc->frame_tx );
    VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME( VCD_SIGNAL_DUMPER_VARIABLES_SUBFRAME_NUMBER_TX0_RU, proc->subframe_tx );
  }

416
  proc->symbol_mask[sf] = 0;  
Raymond Knopp's avatar
Raymond Knopp committed
417
  VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME( VCD_SIGNAL_DUMPER_VARIABLES_TRX_TS, proc->timestamp_rx&0xffffffff );
418 419
  LOG_D(PHY,"RU %d: fh_if4p5_south_in sleeping ...\n",ru->idx);
  usleep(100);
Raymond Knopp's avatar
Raymond Knopp committed
420 421 422 423 424 425
}

// Dummy FH from south for getting synchronization from master RU
void fh_slave_south_in(RU_t *ru,int *frame,int *subframe) {
  // This case is for synchronization to another thread
  // it just waits for an external event.  The actual rx_fh is handle by the asynchronous RX thread
426
  RU_proc_t *proc=&ru->proc;
Raymond Knopp's avatar
Raymond Knopp committed
427 428 429 430 431 432 433 434 435

  if (wait_on_condition(&proc->mutex_FH,&proc->cond_FH,&proc->instance_cnt_FH,"fh_slave_south_in") < 0)
    return;

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

  
}

436 437
// asynchronous inbound if5 fronthaul from south (Mobipass)
void fh_if5_south_asynch_in_mobipass(RU_t *ru,int *frame,int *subframe) {
Raymond Knopp's avatar
Raymond Knopp committed
438

439 440
  RU_proc_t *proc       = &ru->proc;
  LTE_DL_FRAME_PARMS *fp = &ru->frame_parms;
Raymond Knopp's avatar
Raymond Knopp committed
441

442 443 444 445 446 447
  recv_IF5(ru, &proc->timestamp_rx, *subframe, IF5_MOBIPASS); 
  pthread_mutex_lock(&proc->mutex_asynch_rxtx);
  int offset_mobipass = 40120;
  pthread_mutex_lock(&proc->mutex_asynch_rxtx);
  proc->subframe_rx = ((proc->timestamp_rx-offset_mobipass)/fp->samples_per_tti)%10;
  proc->frame_rx    = ((proc->timestamp_rx-offset_mobipass)/(fp->samples_per_tti*10))&1023;
Raymond Knopp's avatar
Raymond Knopp committed
448

449 450
  proc->subframe_rx = (proc->timestamp_rx/fp->samples_per_tti)%10;
  proc->frame_rx    = (proc->timestamp_rx/(10*fp->samples_per_tti))&1023;
Raymond Knopp's avatar
Raymond Knopp committed
451

452 453
  if (proc->first_rx == 1) {
    proc->first_rx =2;
Raymond Knopp's avatar
Raymond Knopp committed
454 455
    *subframe = proc->subframe_rx;
    *frame    = proc->frame_rx; 
456
    LOG_E(PHY,"[Mobipass]timestamp_rx:%llu, frame_rx %d, subframe: %d\n",(unsigned long long int)proc->timestamp_rx,proc->frame_rx,proc->subframe_rx);
Raymond Knopp's avatar
Raymond Knopp committed
457 458 459
  }
  else {
    if (proc->subframe_rx != *subframe) {
460 461 462
        proc->first_rx++;
	LOG_E(PHY,"[Mobipass]timestamp:%llu, subframe_rx %d is not what we expect %d, first_rx:%d\n",(unsigned long long int)proc->timestamp_rx, proc->subframe_rx,*subframe, proc->first_rx);
      //exit_fun("Exiting");
Raymond Knopp's avatar
Raymond Knopp committed
463 464
    }
    if (proc->frame_rx != *frame) {
465 466 467
        proc->first_rx++;
       LOG_E(PHY,"[Mobipass]timestamp:%llu, frame_rx %d is not what we expect %d, first_rx:%d\n",(unsigned long long int)proc->timestamp_rx,proc->frame_rx,*frame, proc->first_rx);  
     // exit_fun("Exiting");
Raymond Knopp's avatar
Raymond Knopp committed
468
    }
469 470 471
    // temporary solution
      *subframe = proc->subframe_rx;
      *frame    = proc->frame_rx;
Raymond Knopp's avatar
Raymond Knopp committed
472
  }
473 474 475 476

  pthread_mutex_unlock(&proc->mutex_asynch_rxtx);


Raymond Knopp's avatar
Raymond Knopp committed
477 478 479 480 481 482
} // eNodeB_3GPP_BBU 

// asynchronous inbound if4p5 fronthaul from south
void fh_if4p5_south_asynch_in(RU_t *ru,int *frame,int *subframe) {

  LTE_DL_FRAME_PARMS *fp = &ru->frame_parms;
483
  RU_proc_t *proc       = &ru->proc;
Raymond Knopp's avatar
Raymond Knopp committed
484 485

  uint16_t packet_type;
Raymond Knopp's avatar
Raymond Knopp committed
486
  uint32_t symbol_number,symbol_mask,prach_rx;
487
  uint32_t got_prach_info=0;
Raymond Knopp's avatar
Raymond Knopp committed
488 489

  symbol_number = 0;
490 491
  symbol_mask   = (1<<fp->symbols_per_tti)-1;
  prach_rx      = 0;
Raymond Knopp's avatar
Raymond Knopp committed
492 493 494

  do {   // Blocking, we need a timeout on this !!!!!!!!!!!!!!!!!!!!!!!
    recv_IF4p5(ru, &proc->frame_rx, &proc->subframe_rx, &packet_type, &symbol_number);
495 496 497 498 499
    // grab first prach information for this new subframe
    if (got_prach_info==0) {
      prach_rx       = is_prach_subframe(fp, proc->frame_rx, proc->subframe_rx);
      got_prach_info = 1;
    }
Raymond Knopp's avatar
Raymond Knopp committed
500 501 502 503 504 505 506 507 508 509 510 511 512 513 514
    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");
      }
    }
515 516 517 518 519 520 521 522 523
    if      (packet_type == IF4p5_PULFFT)       symbol_mask &= (~(1<<symbol_number));
    else if (packet_type == IF4p5_PRACH)        prach_rx    &= (~0x1);
#ifdef Rel14
    else if (packet_type == IF4p5_PRACH_BR_CE0) prach_rx    &= (~0x2);
    else if (packet_type == IF4p5_PRACH_BR_CE1) prach_rx    &= (~0x4);
    else if (packet_type == IF4p5_PRACH_BR_CE2) prach_rx    &= (~0x8);
    else if (packet_type == IF4p5_PRACH_BR_CE3) prach_rx    &= (~0x10);
#endif
  } while( (symbol_mask > 0) || (prach_rx >0));   // haven't received all PUSCH symbols and PRACH information 
Raymond Knopp's avatar
Raymond Knopp committed
524 525 526 527 528 529 530 531 532 533 534
} 





/*************************************************************/
/* Input Fronthaul from North RRU                            */
  
// RRU IF4p5 TX fronthaul receiver. Assumes an if_device on input and if or rf device on output 
// receives one subframe's worth of IF4p5 OFDM symbols and OFDM modulates
535
void fh_if4p5_north_in(RU_t *ru,int *frame,int *subframe) {
Raymond Knopp's avatar
Raymond Knopp committed
536 537 538 539 540

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

541

Raymond Knopp's avatar
Raymond Knopp committed
542 543 544 545 546 547
  /// **** incoming IF4p5 from remote RCC/RAU **** ///             
  symbol_number = 0;
  symbol_mask = 0;
  symbol_mask_full = (1<<ru->frame_parms.symbols_per_tti)-1;
  
  do { 
548
    recv_IF4p5(ru, frame, subframe, &packet_type, &symbol_number);
Raymond Knopp's avatar
Raymond Knopp committed
549 550 551
    symbol_mask = symbol_mask | (1<<symbol_number);
  } while (symbol_mask != symbol_mask_full); 

552 553
  // dump VCD output for first RU in list
  if (ru == RC.ru[0]) {
554 555
    VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME( VCD_SIGNAL_DUMPER_VARIABLES_FRAME_NUMBER_TX0_RU, *frame );
    VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME( VCD_SIGNAL_DUMPER_VARIABLES_SUBFRAME_NUMBER_TX0_RU, *subframe );
Raymond Knopp's avatar
Raymond Knopp committed
556 557 558 559 560 561
  }
}

void fh_if5_north_asynch_in(RU_t *ru,int *frame,int *subframe) {

  LTE_DL_FRAME_PARMS *fp = &ru->frame_parms;
562
  RU_proc_t *proc        = &ru->proc;
Raymond Knopp's avatar
Raymond Knopp committed
563 564 565 566 567 568 569 570 571 572 573 574 575 576 577
  int subframe_tx,frame_tx;
  openair0_timestamp timestamp_tx;

  recv_IF5(ru, &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 {
578 579 580 581
    AssertFatal(subframe_tx == *subframe,
                "subframe_tx %d is not what we expect %d\n",subframe_tx,*subframe);
    AssertFatal(frame_tx == *frame, 
                "frame_tx %d is not what we expect %d\n",frame_tx,*frame);
Raymond Knopp's avatar
Raymond Knopp committed
582 583 584 585 586 587
  }
}

void fh_if4p5_north_asynch_in(RU_t *ru,int *frame,int *subframe) {

  LTE_DL_FRAME_PARMS *fp = &ru->frame_parms;
588
  RU_proc_t *proc        = &ru->proc;
Raymond Knopp's avatar
Raymond Knopp committed
589 590 591 592 593 594 595

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

  symbol_number = 0;
  symbol_mask = 0;
596
  symbol_mask_full = ((subframe_select(fp,*subframe) == SF_S) ? (1<<fp->dl_symbols_in_S_subframe) : (1<<fp->symbols_per_tti))-1;
Raymond Knopp's avatar
Raymond Knopp committed
597 598
  do {   
    recv_IF4p5(ru, &frame_tx, &subframe_tx, &packet_type, &symbol_number);
599
    if ((subframe_select(fp,subframe_tx) == SF_DL) && (symbol_number == 0)) start_meas(&ru->rx_fhaul);
600 601
    LOG_D(PHY,"subframe %d (%d): frame %d, subframe %d, symbol %d\n",
         *subframe,subframe_select(fp,*subframe),frame_tx,subframe_tx,symbol_number);
Raymond Knopp's avatar
Raymond Knopp committed
602 603 604 605
    if (proc->first_tx != 0) {
      *frame    = frame_tx;
      *subframe = subframe_tx;
      proc->first_tx = 0;
606
      symbol_mask_full = ((subframe_select(fp,*subframe) == SF_S) ? (1<<fp->dl_symbols_in_S_subframe) : (1<<fp->symbols_per_tti))-1;
Raymond Knopp's avatar
Raymond Knopp committed
607 608
    }
    else {
609 610 611 612
      AssertFatal(frame_tx == *frame,
	          "frame_tx %d is not what we expect %d\n",frame_tx,*frame);
      AssertFatal(subframe_tx == *subframe,
		  "subframe_tx %d is not what we expect %d\n",subframe_tx,*subframe);
Raymond Knopp's avatar
Raymond Knopp committed
613 614 615 616
    }
    if (packet_type == IF4p5_PDLFFT) {
      symbol_mask = symbol_mask | (1<<symbol_number);
    }
617
    else AssertFatal(1==0,"Illegal IF4p5 packet type (should only be IF4p5_PDLFFT%d\n",packet_type);
Raymond Knopp's avatar
Raymond Knopp committed
618
  } while (symbol_mask != symbol_mask_full);    
619

620
  if (subframe_select(fp,subframe_tx) == SF_DL) stop_meas(&ru->rx_fhaul);
621

622 623 624 625
  proc->subframe_tx  = subframe_tx;
  proc->frame_tx     = frame_tx;

  if ((frame_tx == 0)&&(subframe_tx == 0)) proc->frame_tx_unwrap += 1024;
626

627
  proc->timestamp_tx = (((frame_tx + proc->frame_tx_unwrap) * 10) + subframe_tx) * fp->samples_per_tti;
628
  LOG_D(PHY,"RU %d/%d TST %llu, frame %d, subframe %d\n",ru->idx,0,(long long unsigned int)proc->timestamp_tx,frame_tx,subframe_tx);
629 630 631 632 633
    // dump VCD output for first RU in list
  if (ru == RC.ru[0]) {
    VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME( VCD_SIGNAL_DUMPER_VARIABLES_FRAME_NUMBER_TX0_RU, frame_tx );
    VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME( VCD_SIGNAL_DUMPER_VARIABLES_SUBFRAME_NUMBER_TX0_RU, subframe_tx );
  }
634

635 636
  if (ru->feptx_ofdm) ru->feptx_ofdm(ru);
  if (ru->fh_south_out) ru->fh_south_out(ru);
Raymond Knopp's avatar
Raymond Knopp committed
637 638
} 

639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656
void fh_if5_north_out(RU_t *ru) {

  RU_proc_t *proc=&ru->proc;
  uint8_t seqno=0;

  /// **** send_IF5 of rxdata to BBU **** ///       
  VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME( VCD_SIGNAL_DUMPER_FUNCTIONS_SEND_IF5, 1 );  
  send_IF5(ru, proc->timestamp_rx, proc->subframe_rx, &seqno, IF5_RRH_GW_UL);
  VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME( VCD_SIGNAL_DUMPER_FUNCTIONS_SEND_IF5, 0 );          

}

// RRU IF4p5 northbound interface (RX)
void fh_if4p5_north_out(RU_t *ru) {

  RU_proc_t *proc=&ru->proc;
  LTE_DL_FRAME_PARMS *fp = &ru->frame_parms;
  const int subframe     = proc->subframe_rx;
657
  if (ru->idx==0) VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME( VCD_SIGNAL_DUMPER_VARIABLES_SUBFRAME_NUMBER_RX0_RU, proc->subframe_rx );
658 659 660

  if ((fp->frame_type == TDD) && (subframe_select(fp,subframe)!=SF_UL)) {
    /// **** in TDD during DL send_IF4 of ULTICK to RCC **** ///
661
    send_IF4p5(ru, proc->frame_rx, proc->subframe_rx, IF4p5_PULTICK);
662 663 664
    return;
  }

665 666 667
  start_meas(&ru->tx_fhaul);
  send_IF4p5(ru, proc->frame_rx, proc->subframe_rx, IF4p5_PULFFT);
  stop_meas(&ru->tx_fhaul);
668 669

}
670 671 672 673 674 675 676 677 678 679 680 681 682 683

/* add fail safe for late command */
typedef enum {
	STATE_BURST_NORMAL = 0,
	STATE_BURST_TERMINATE = 1,
	STATE_BURST_STOP_1 = 2,
	STATE_BURST_STOP_2 = 3,
	STATE_BURST_RESTART = 4,
} late_control_e;

volatile late_control_e late_control=STATE_BURST_NORMAL;

/* add fail safe for late command end */

Raymond Knopp's avatar
Raymond Knopp committed
684 685
void rx_rf(RU_t *ru,int *frame,int *subframe) {

686
  RU_proc_t *proc = &ru->proc;
Raymond Knopp's avatar
Raymond Knopp committed
687
  LTE_DL_FRAME_PARMS *fp = &ru->frame_parms;
688
  void *rxp[ru->nb_rx];
689
  unsigned int rxs;
Raymond Knopp's avatar
Raymond Knopp committed
690
  int i;
691
  openair0_timestamp ts,old_ts;
Raymond Knopp's avatar
Raymond Knopp committed
692
    
693
  for (i=0; i<ru->nb_rx; i++)
694
    rxp[i] = (void*)&ru->common.rxdata[i][*subframe*fp->samples_per_tti];
Raymond Knopp's avatar
Raymond Knopp committed
695 696 697
  
  VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME( VCD_SIGNAL_DUMPER_FUNCTIONS_TRX_READ, 1 );

698 699
  old_ts = proc->timestamp_rx;

Raymond Knopp's avatar
Raymond Knopp committed
700
  rxs = ru->rfdevice.trx_read_func(&ru->rfdevice,
701
				   &ts,
Raymond Knopp's avatar
Raymond Knopp committed
702 703
				   rxp,
				   fp->samples_per_tti,
704
				   ru->nb_rx);
Raymond Knopp's avatar
Raymond Knopp committed
705 706 707
  
  VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME( VCD_SIGNAL_DUMPER_FUNCTIONS_TRX_READ, 0 );
 
708 709
  proc->timestamp_rx = ts-ru->ts_offset;

710 711 712 713 714 715
//  AssertFatal(rxs == fp->samples_per_tti,
//	      "rx_rf: Asked for %d samples, got %d from USRP\n",fp->samples_per_tti,rxs);
  if(rxs != fp->samples_per_tti){
    LOG_E(PHY,"rx_rf: Asked for %d samples, got %d from USRP\n",fp->samples_per_tti,rxs);
    late_control=STATE_BURST_TERMINATE;
  }
716 717

  if (proc->first_rx == 1) {
718
    ru->ts_offset = proc->timestamp_rx;
719 720 721 722 723 724 725 726 727 728 729 730
    proc->timestamp_rx = 0;
  }
  else {
    if (proc->timestamp_rx - old_ts != fp->samples_per_tti) {
      LOG_I(PHY,"rx_rf: rfdevice timing drift of %"PRId64" samples (ts_off %"PRId64")\n",proc->timestamp_rx - old_ts - fp->samples_per_tti,ru->ts_offset);
      ru->ts_offset += (proc->timestamp_rx - old_ts - fp->samples_per_tti);
      proc->timestamp_rx = ts-ru->ts_offset;
    }

  }
  proc->frame_rx     = (proc->timestamp_rx / (fp->samples_per_tti*10))&1023;
  proc->subframe_rx  = (proc->timestamp_rx / fp->samples_per_tti)%10;
Raymond Knopp's avatar
Raymond Knopp committed
731 732
  // synchronize first reception to frame 0 subframe 0

733 734 735
  proc->timestamp_tx = proc->timestamp_rx+(4*fp->samples_per_tti);
  proc->subframe_tx  = (proc->subframe_rx+4)%10;
  proc->frame_tx     = (proc->subframe_rx>5) ? (proc->frame_rx+1)&1023 : proc->frame_rx;
736 737 738 739 740 741
  
  LOG_D(PHY,"RU %d/%d TS %llu (off %d), frame %d, subframe %d\n",
	ru->idx, 
	0, 
	(unsigned long long int)proc->timestamp_rx,
	(int)ru->ts_offset,proc->frame_rx,proc->subframe_rx);
742

743 744 745 746
    // dump VCD output for first RU in list
  if (ru == RC.ru[0]) {
    VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME( VCD_SIGNAL_DUMPER_VARIABLES_FRAME_NUMBER_RX0_RU, proc->frame_rx );
    VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME( VCD_SIGNAL_DUMPER_VARIABLES_SUBFRAME_NUMBER_RX0_RU, proc->subframe_rx );
Raymond.Knopp's avatar
Raymond.Knopp committed
747 748
    VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME( VCD_SIGNAL_DUMPER_VARIABLES_FRAME_NUMBER_TX0_RU, proc->frame_tx );
    VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME( VCD_SIGNAL_DUMPER_VARIABLES_SUBFRAME_NUMBER_TX0_RU, proc->subframe_tx );
749
  }
Raymond Knopp's avatar
Raymond Knopp committed
750 751 752
  
  if (proc->first_rx == 0) {
    if (proc->subframe_rx != *subframe){
753
      LOG_E(PHY,"Received Timestamp (%llu) doesn't correspond to the time we think it is (proc->subframe_rx %d, subframe %d)\n",(long long unsigned int)proc->timestamp_rx,proc->subframe_rx,*subframe);
Raymond Knopp's avatar
Raymond Knopp committed
754 755 756 757
      exit_fun("Exiting");
    }
    
    if (proc->frame_rx != *frame) {
758
      LOG_E(PHY,"Received Timestamp (%llu) doesn't correspond to the time we think it is (proc->frame_rx %d frame %d)\n",(long long unsigned int)proc->timestamp_rx,proc->frame_rx,*frame);
Raymond Knopp's avatar
Raymond Knopp committed
759 760 761 762 763 764 765 766 767 768
      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",ru->timestamp_rx,proc->frame_rx,frame,proc->subframe_rx,subframe);
  
769
  VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME( VCD_SIGNAL_DUMPER_VARIABLES_TRX_TS, proc->timestamp_rx&0xffffffff );
Raymond Knopp's avatar
Raymond Knopp committed
770
  
771 772
//  if (rxs != fp->samples_per_tti)
//    exit_fun( "problem receiving samples" );
Raymond Knopp's avatar
Raymond Knopp committed
773 774 775 776 777 778
  

  
}


779 780 781 782
void tx_rf(RU_t *ru) {

  RU_proc_t *proc = &ru->proc;
  LTE_DL_FRAME_PARMS *fp = &ru->frame_parms;
783
  void *txp[ru->nb_tx]; 
784 785 786
  unsigned int txs;
  int i;

Cedric Roux's avatar
Cedric Roux committed
787 788 789
  T(T_ENB_PHY_OUTPUT_SIGNAL, T_INT(0), T_INT(0), T_INT(proc->frame_tx), T_INT(proc->subframe_tx),
    T_INT(0), T_BUFFER(&ru->common.txdata[0][proc->subframe_tx * fp->samples_per_tti], fp->samples_per_tti * 4));

790 791 792
  lte_subframe_t SF_type     = subframe_select(fp,proc->subframe_tx%10);
  lte_subframe_t prevSF_type = subframe_select(fp,(proc->subframe_tx+9)%10);
  lte_subframe_t nextSF_type = subframe_select(fp,(proc->subframe_tx+1)%10);
793 794
  int sf_extension = 0;

795 796 797 798 799 800 801 802 803 804 805 806 807
  if ((SF_type == SF_DL) ||
      (SF_type == SF_S)) {
    
    
    int siglen=fp->samples_per_tti,flags=1;
    
    if (SF_type == SF_S) {
      siglen = fp->dl_symbols_in_S_subframe*(fp->ofdm_symbol_size+fp->nb_prefix_samples0);
      flags=3; // end of burst
    }
    if ((fp->frame_type == TDD) &&
	(SF_type == SF_DL)&&
	(prevSF_type == SF_UL) &&
808
	(nextSF_type == SF_DL)) { 
809
      flags = 2; // start of burst
810 811
      sf_extension = ru->N_TA_offset<<1;
    }
812 813 814 815
    
    if ((fp->frame_type == TDD) &&
	(SF_type == SF_DL)&&
	(prevSF_type == SF_UL) &&
816
	(nextSF_type == SF_UL)) {
817
      flags = 4; // start of burst and end of burst (only one DL SF between two UL)
818 819 820 821 822
      sf_extension = ru->N_TA_offset<<1;
    } 

    for (i=0; i<ru->nb_tx; i++)
      txp[i] = (void*)&ru->common.txdata[i][(proc->subframe_tx*fp->samples_per_tti)-sf_extension];
823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849
    /* add fail safe for late command */
    if(late_control!=STATE_BURST_NORMAL){//stop burst
      switch (late_control) {
      case STATE_BURST_TERMINATE:
        flags=10; // end of burst and no time spec
        late_control=STATE_BURST_STOP_1;
        break;
      
      case STATE_BURST_STOP_1:
        flags=0; // no send
        late_control=STATE_BURST_STOP_2;
        return;//no send
       break;
      
      case STATE_BURST_STOP_2:
        flags=0; // no send
        late_control=STATE_BURST_RESTART;
        return;//no send
        break;
      
      case STATE_BURST_RESTART:
        flags=2; // start burst
        late_control=STATE_BURST_NORMAL;
        break;
      }
    }
    /* add fail safe for late command end */
850
    
851 852 853 854 855
    VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME( VCD_SIGNAL_DUMPER_VARIABLES_TRX_TST, (proc->timestamp_tx-ru->openair0_cfg.tx_sample_advance)&0xffffffff );
    VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME( VCD_SIGNAL_DUMPER_FUNCTIONS_TRX_WRITE, 1 );
    // prepare tx buffer pointers
    
    txs = ru->rfdevice.trx_write_func(&ru->rfdevice,
856
				      proc->timestamp_tx+ru->ts_offset-ru->openair0_cfg.tx_sample_advance-sf_extension,
857
				      txp,
858
				      siglen+sf_extension,
859 860 861 862
				      ru->nb_tx,
				      flags);
    
    LOG_D(PHY,"[TXPATH] RU %d tx_rf, writing to TS %llu, frame %d, unwrapped_frame %d, subframe %d\n",ru->idx,
Raymond Knopp's avatar
Raymond Knopp committed
863
	  (long long unsigned int)proc->timestamp_tx,proc->frame_tx,proc->frame_tx_unwrap,proc->subframe_tx);
864
    VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME( VCD_SIGNAL_DUMPER_FUNCTIONS_TRX_WRITE, 0 );
865
    
866
    
867 868 869 870 871
//    AssertFatal(txs ==  siglen+sf_extension,"TX : Timeout (sent %d/%d)\n",txs, siglen);
    if( (txs !=  siglen+sf_extension) && (late_control==STATE_BURST_NORMAL) ){ /* add fail safe for late command */
      late_control=STATE_BURST_TERMINATE;
      LOG_E(PHY,"TX : Timeout (sent %d/%d) state =%d\n",txs, siglen,late_control);
    }
872
  }
873 874 875
}


Raymond Knopp's avatar
Raymond Knopp committed
876 877 878 879 880 881 882 883 884 885
/*!
 * \brief The Asynchronous RX/TX FH thread of RAU/RCC/eNB/RRU.
 * 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.
 */
static void* ru_thread_asynch_rxtx( void* param ) {

  static int ru_thread_asynch_rxtx_status;

886 887 888
  RU_t *ru         = (RU_t*)param;
  RU_proc_t *proc  = &ru->proc;

Raymond Knopp's avatar
Raymond Knopp committed
889 890 891 892


  int subframe=0, frame=0; 

893
  thread_top_init("ru_thread_asynch_rxtx",1,870000L,1000000L,1000000L);
Raymond Knopp's avatar
Raymond Knopp committed
894 895 896

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

897
  wait_sync("ru_thread_asynch_rxtx");
Raymond Knopp's avatar
Raymond Knopp committed
898 899

  // wait for top-level synchronization and do one acquisition to get timestamp for setting frame/subframe
900
  printf( "waiting for devices (ru_thread_asynch_rx)\n");
Raymond Knopp's avatar
Raymond Knopp committed
901 902 903

  wait_on_condition(&proc->mutex_asynch_rxtx,&proc->cond_asynch_rxtx,&proc->instance_cnt_asynch_rxtx,"thread_asynch");

904
  printf( "devices ok (ru_thread_asynch_rx)\n");
Raymond Knopp's avatar
Raymond Knopp committed
905 906 907 908 909 910 911 912 913 914 915 916 917


  while (!oai_exit) { 
   
    if (oai_exit) break;   

    if (subframe==9) { 
      subframe=0;
      frame++;
      frame&=1023;
    } else {
      subframe++;
    }      
918
    LOG_D(PHY,"ru_thread_asynch_rxtx: Waiting on incoming fronthaul\n");
919 920 921
    // asynchronous receive from south (Mobipass)
    if (ru->fh_south_asynch_in) ru->fh_south_asynch_in(ru,&frame,&subframe);
    // asynchronous receive from north (RRU IF4/IF5)
922 923 924 925
    else if (ru->fh_north_asynch_in) {
       if (subframe_select(&ru->frame_parms,subframe)!=SF_UL)
         ru->fh_north_asynch_in(ru,&frame,&subframe);
    }
926
    else AssertFatal(1==0,"Unknown function in ru_thread_asynch_rxtx\n");
Raymond Knopp's avatar
Raymond Knopp committed
927 928 929 930 931 932 933 934 935
  }

  ru_thread_asynch_rxtx_status=0;
  return(&ru_thread_asynch_rxtx_status);
}




936
void wakeup_slaves(RU_proc_t *proc) {
Raymond Knopp's avatar
Raymond Knopp committed
937 938 939 940 941 942 943 944

  int i;
  struct timespec wait;
  
  wait.tv_sec=0;
  wait.tv_nsec=5000000L;
  
  for (i=0;i<proc->num_slaves;i++) {
945
    RU_proc_t *slave_proc = proc->slave_proc[i];
Raymond Knopp's avatar
Raymond Knopp committed
946 947 948
    // 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) {
949
      LOG_E( PHY, "ERROR pthread_mutex_lock for RU %d slave %d (IC %d)\n",proc->ru->idx,slave_proc->ru->idx,slave_proc->instance_cnt_FH);
Raymond Knopp's avatar
Raymond Knopp committed
950 951 952 953 954 955 956 957 958 959 960 961 962 963 964
      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;
    slave_proc->timestamp_tx = proc->timestamp_tx; 

    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) {
965
	LOG_E( PHY, "ERROR pthread_cond_signal for RU %d, slave RU %d\n",proc->ru->idx,slave_proc->ru->idx);
Raymond Knopp's avatar
Raymond Knopp committed
966 967 968 969
          exit_fun( "ERROR pthread_cond_signal" );
	  break;
      }
    } else {
970
      LOG_W( PHY,"[RU] Frame %d, slave %d thread busy!! (cnt_FH %i)\n",slave_proc->frame_rx,slave_proc->ru->idx, cnt_slave);
Raymond Knopp's avatar
Raymond Knopp committed
971 972 973 974 975 976 977 978
      exit_fun( "FH thread busy" );
      break;
    }             
  }
}

/*!
 * \brief The prach receive thread of RU.
979
 * \param param is a \ref RU_proc_t structure which contains the info what to process.
Raymond Knopp's avatar
Raymond Knopp committed
980 981 982
 * \returns a pointer to an int. The storage is not on the heap and must not be freed.
 */
static void* ru_thread_prach( void* param ) {
983

Raymond Knopp's avatar
Raymond Knopp committed
984 985
  static int ru_thread_prach_status;

986 987
  RU_t *ru        = (RU_t*)param;
  RU_proc_t *proc = (RU_proc_t*)&ru->proc;
Raymond Knopp's avatar
Raymond Knopp committed
988 989

  // set default return value
990
  ru_thread_prach_status = 0;
Raymond Knopp's avatar
Raymond Knopp committed
991

992
  thread_top_init("ru_thread_prach",1,500000L,1000000L,20000000L);
Raymond Knopp's avatar
Raymond Knopp committed
993 994 995 996

  while (!oai_exit) {
    
    if (oai_exit) break;
997
    if (wait_on_condition(&proc->mutex_prach,&proc->cond_prach,&proc->instance_cnt_prach,"ru_prach_thread") < 0) break;
998
    VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME( VCD_SIGNAL_DUMPER_FUNCTIONS_PHY_RU_PRACH_RX, 1 );      
999 1000
    rx_prach(NULL,
	     ru,
1001
	     NULL,
1002 1003 1004
             NULL,
             NULL,
             proc->frame_prach,
1005 1006 1007 1008 1009
             0
#ifdef Rel14
	     ,0
#endif
	     );
1010
    VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME( VCD_SIGNAL_DUMPER_FUNCTIONS_PHY_RU_PRACH_RX, 0 );      
1011
    if (release_thread(&proc->mutex_prach,&proc->instance_cnt_prach,"ru_prach_thread") < 0) break;
Raymond Knopp's avatar
Raymond Knopp committed
1012 1013
  }

1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048
  LOG_I(PHY, "Exiting RU thread PRACH\n");

  ru_thread_prach_status = 0;
  return &ru_thread_prach_status;
}

#ifdef Rel14
static void* ru_thread_prach_br( void* param ) {

  static int ru_thread_prach_status;

  RU_t *ru        = (RU_t*)param;
  RU_proc_t *proc = (RU_proc_t*)&ru->proc;

  // set default return value
  ru_thread_prach_status = 0;

  thread_top_init("ru_thread_prach_br",1,500000L,1000000L,20000000L);

  while (!oai_exit) {
    
    if (oai_exit) break;
    if (wait_on_condition(&proc->mutex_prach_br,&proc->cond_prach_br,&proc->instance_cnt_prach_br,"ru_prach_thread_br") < 0) break;
    rx_prach(NULL,
	     ru,
	     NULL,
             NULL,
             NULL,
             proc->frame_prach_br,
             0,
	     1);
    if (release_thread(&proc->mutex_prach_br,&proc->instance_cnt_prach_br,"ru_prach_thread_br") < 0) break;
  }

  LOG_I(PHY, "Exiting RU thread PRACH BR\n");
Raymond Knopp's avatar
Raymond Knopp committed
1049

1050 1051
  ru_thread_prach_status = 0;
  return &ru_thread_prach_status;
Raymond Knopp's avatar
Raymond Knopp committed
1052
}
1053
#endif
Raymond Knopp's avatar
Raymond Knopp committed
1054

1055
int wakeup_synch(RU_t *ru){
Raymond Knopp's avatar
Raymond Knopp committed
1056

1057 1058 1059 1060
  struct timespec wait;
  
  wait.tv_sec=0;
  wait.tv_nsec=5000000L;
Raymond Knopp's avatar
Raymond Knopp committed
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 1087 1088
  // wake up synch thread
  // lock the synch mutex and make sure the thread is ready
  if (pthread_mutex_timedlock(&ru->proc.mutex_synch,&wait) != 0) {
    LOG_E( PHY, "[RU] ERROR pthread_mutex_lock for RU synch thread (IC %d)\n", ru->proc.instance_cnt_synch );
    exit_fun( "error locking mutex_synch" );
    return(-1);
  }
  
  ++ru->proc.instance_cnt_synch;
  
  // the thread can now be woken up
  if (pthread_cond_signal(&ru->proc.cond_synch) != 0) {
    LOG_E( PHY, "[RU] ERROR pthread_cond_signal for RU synch thread\n");
    exit_fun( "ERROR pthread_cond_signal" );
    return(-1);
  }
  
  pthread_mutex_unlock( &ru->proc.mutex_synch );

  return(0);
}

void do_ru_synch(RU_t *ru) {

  LTE_DL_FRAME_PARMS *fp  = &ru->frame_parms;
  RU_proc_t *proc         = &ru->proc;
  int i;
Raymond Knopp's avatar
Raymond Knopp committed
1089 1090
  void *rxp[2],*rxp2[2];
  int32_t dummy_rx[ru->nb_rx][fp->samples_per_tti] __attribute__((aligned(32)));
1091 1092
  int rxs;
  int ic;
Raymond Knopp's avatar
Raymond Knopp committed
1093 1094 1095

  // initialize the synchronization buffer to the common_vars.rxdata
  for (int i=0;i<ru->nb_rx;i++)
1096
    rxp[i] = &ru->common.rxdata[i][0];
Raymond Knopp's avatar
Raymond Knopp committed
1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112

  double temp_freq1 = ru->rfdevice.openair0_cfg->rx_freq[0];
  double temp_freq2 = ru->rfdevice.openair0_cfg->tx_freq[0];
  for (i=0;i<4;i++) {
    ru->rfdevice.openair0_cfg->rx_freq[i] = ru->rfdevice.openair0_cfg->tx_freq[i];
    ru->rfdevice.openair0_cfg->tx_freq[i] = temp_freq1;
  }
  ru->rfdevice.trx_set_freq_func(&ru->rfdevice,ru->rfdevice.openair0_cfg,0);
  
  while ((ru->in_synch ==0)&&(!oai_exit)) {
    // read in frame
    rxs = ru->rfdevice.trx_read_func(&ru->rfdevice,
				     &(proc->timestamp_rx),
				     rxp,
				     fp->samples_per_tti*10,
				     ru->nb_rx);
1113 1114
    if (rxs != fp->samples_per_tti*10) LOG_E(PHY,"requested %d samples, got %d\n",fp->samples_per_tti*10,rxs);
 
Raymond Knopp's avatar
Raymond Knopp committed
1115 1116 1117 1118 1119 1120 1121 1122
    // wakeup synchronization processing thread
    wakeup_synch(ru);
    ic=0;
    
    while ((ic>=0)&&(!oai_exit)) {
      // continuously read in frames, 1ms at a time, 
      // until we are done with the synchronization procedure
      
1123
      for (i=0; i<ru->nb_rx; i++)
Raymond Knopp's avatar
Raymond Knopp committed
1124 1125 1126 1127 1128 1129 1130
	rxp2[i] = (void*)&dummy_rx[i][0];
      for (i=0;i<10;i++)
	rxs = ru->rfdevice.trx_read_func(&ru->rfdevice,
					 &(proc->timestamp_rx),
					 rxp2,
					 fp->samples_per_tti,
					 ru->nb_rx);
1131 1132 1133
      pthread_mutex_lock(&ru->proc.mutex_synch);
      ic = ru->proc.instance_cnt_synch;
      pthread_mutex_unlock(&ru->proc.mutex_synch);
Raymond Knopp's avatar
Raymond Knopp committed
1134 1135 1136 1137 1138 1139 1140 1141
    } // ic>=0
  } // in_synch==0
    // read in rx_offset samples
  LOG_I(PHY,"Resynchronizing by %d samples\n",ru->rx_offset);
  rxs = ru->rfdevice.trx_read_func(&ru->rfdevice,
				   &(proc->timestamp_rx),
				   rxp,
				   ru->rx_offset,
1142
				   ru->nb_rx);
Raymond Knopp's avatar
Raymond Knopp committed
1143 1144 1145 1146 1147 1148 1149 1150 1151
  for (i=0;i<4;i++) {
    ru->rfdevice.openair0_cfg->rx_freq[i] = temp_freq1;
    ru->rfdevice.openair0_cfg->tx_freq[i] = temp_freq2;
  }

  ru->rfdevice.trx_set_freq_func(&ru->rfdevice,ru->rfdevice.openair0_cfg,0);

}

1152 1153 1154 1155 1156 1157 1158


void wakeup_eNBs(RU_t *ru) {

  int i;
  PHY_VARS_eNB **eNB_list = ru->eNB_list;

1159 1160
  LOG_D(PHY,"wakeup_eNBs (num %d) for RU %d\n",ru->num_eNB,ru->idx);

1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171
  if (ru->num_eNB==1) {
    // call eNB function directly

    char string[20];
    sprintf(string,"Incoming RU %d",ru->idx);
    LOG_D(PHY,"RU %d Waking up eNB\n",ru->idx);
    ru->eNB_top(eNB_list[0],ru->proc.frame_rx,ru->proc.subframe_rx,string);
  }
  else {

    for (i=0;i<ru->num_eNB;i++)
Raymond Knopp's avatar
Raymond Knopp committed
1172
      if (ru->wakeup_rxtx(eNB_list[i],ru) < 0)
1173 1174 1175 1176
	LOG_E(PHY,"could not wakeup eNB rxtx process for subframe %d\n", ru->proc.subframe_rx);
  }
}

1177
static inline int wakeup_prach_ru(RU_t *ru) {
1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188

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

  if (pthread_mutex_timedlock(&ru->proc.mutex_prach,&wait) !=0) {
    LOG_E( PHY, "[RU] ERROR pthread_mutex_lock for RU prach thread (IC %d)\n", ru->proc.instance_cnt_prach);
    exit_fun( "error locking mutex_rxtx" );
    return(-1);
  }
1189 1190 1191 1192
  if (ru->proc.instance_cnt_prach==-1) {
    ++ru->proc.instance_cnt_prach;
    ru->proc.frame_prach    = ru->proc.frame_rx;
    ru->proc.subframe_prach = ru->proc.subframe_rx;
1193 1194

    LOG_D(PHY,"RU %d: waking up PRACH thread\n",ru->idx);
1195 1196
    // the thread can now be woken up
    AssertFatal(pthread_cond_signal(&ru->proc.cond_prach) == 0, "ERROR pthread_cond_signal for RU prach thread\n");
1197
  }
1198
  else LOG_W(PHY,"RU prach thread busy, skipping\n");
1199 1200 1201 1202 1203
  pthread_mutex_unlock( &ru->proc.mutex_prach );

  return(0);
}

1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232
#ifdef Rel14
static inline int wakeup_prach_ru_br(RU_t *ru) {

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

  if (pthread_mutex_timedlock(&ru->proc.mutex_prach_br,&wait) !=0) {
    LOG_E( PHY, "[RU] ERROR pthread_mutex_lock for RU prach thread BR (IC %d)\n", ru->proc.instance_cnt_prach_br);
    exit_fun( "error locking mutex_rxtx" );
    return(-1);
  }
  if (ru->proc.instance_cnt_prach_br==-1) {
    ++ru->proc.instance_cnt_prach_br;
    ru->proc.frame_prach_br    = ru->proc.frame_rx;
    ru->proc.subframe_prach_br = ru->proc.subframe_rx;

    LOG_D(PHY,"RU %d: waking up PRACH thread\n",ru->idx);
    // the thread can now be woken up
    AssertFatal(pthread_cond_signal(&ru->proc.cond_prach_br) == 0, "ERROR pthread_cond_signal for RU prach thread BR\n");
  }
  else LOG_W(PHY,"RU prach thread busy, skipping\n");
  pthread_mutex_unlock( &ru->proc.mutex_prach_br );

  return(0);
}
#endif

Raymond Knopp's avatar
Raymond Knopp committed
1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320
// this is for RU with local RF unit
void fill_rf_config(RU_t *ru, char *rf_config_file) {

  int i;

  LTE_DL_FRAME_PARMS *fp   = &ru->frame_parms;
  openair0_config_t *cfg   = &ru->openair0_cfg;

  if(fp->N_RB_DL == 100) {
    if (fp->threequarter_fs) {
      cfg->sample_rate=23.04e6;
      cfg->samples_per_frame = 230400; 
      cfg->tx_bw = 10e6;
      cfg->rx_bw = 10e6;
    }
    else {
      cfg->sample_rate=30.72e6;
      cfg->samples_per_frame = 307200; 
      cfg->tx_bw = 10e6;
      cfg->rx_bw = 10e6;
    }
  } else if(fp->N_RB_DL == 50) {
    cfg->sample_rate=15.36e6;
    cfg->samples_per_frame = 153600;
    cfg->tx_bw = 5e6;
    cfg->rx_bw = 5e6;
  } else if (fp->N_RB_DL == 25) {
    cfg->sample_rate=7.68e6;
    cfg->samples_per_frame = 76800;
    cfg->tx_bw = 2.5e6;
    cfg->rx_bw = 2.5e6;
  } else if (fp->N_RB_DL == 6) {
    cfg->sample_rate=1.92e6;
    cfg->samples_per_frame = 19200;
    cfg->tx_bw = 1.5e6;
    cfg->rx_bw = 1.5e6;
  }
  else AssertFatal(1==0,"Unknown N_RB_DL %d\n",fp->N_RB_DL);

  if (fp->frame_type==TDD)
    cfg->duplex_mode = duplex_mode_TDD;
  else //FDD
    cfg->duplex_mode = duplex_mode_FDD;

  cfg->Mod_id = 0;
  cfg->num_rb_dl=fp->N_RB_DL;
  cfg->tx_num_channels=ru->nb_tx;
  cfg->rx_num_channels=ru->nb_rx;
  
  for (i=0; i<ru->nb_tx; i++) {
    
    cfg->tx_freq[i] = (double)fp->dl_CarrierFreq;
    cfg->rx_freq[i] = (double)fp->ul_CarrierFreq;

    cfg->tx_gain[i] = (double)fp->att_tx;
    cfg->rx_gain[i] = ru->max_rxgain-(double)fp->att_rx;

    cfg->configFilename = rf_config_file;
    printf("channel %d, Setting tx_gain offset %f, rx_gain offset %f, tx_freq %f, rx_freq %f\n",
	   i, cfg->tx_gain[i],
	   cfg->rx_gain[i],
	   cfg->tx_freq[i],
	   cfg->rx_freq[i]);
  }
}

/* this function maps the RU tx and rx buffers to the available rf chains.
   Each rf chain is is addressed by the card number and the chain on the card. The
   rf_map specifies for each antenna port, on which rf chain the mapping should start. Multiple
   antennas are mapped to successive RF chains on the same card. */
int setup_RU_buffers(RU_t *ru) {

  int i,j; 
  int card,ant;

  //uint16_t N_TA_offset = 0;

  LTE_DL_FRAME_PARMS *frame_parms;
  
  if (ru) {
    frame_parms = &ru->frame_parms;
    printf("setup_RU_buffers: frame_parms = %p\n",frame_parms);
  } else {
    printf("RU[%d] not initialized\n", ru->idx);
    return(-1);
  }
  
  
1321 1322 1323 1324 1325
  if (frame_parms->frame_type == TDD) {
    if      (frame_parms->N_RB_DL == 100) ru->N_TA_offset = 624;
    else if (frame_parms->N_RB_DL == 50)  ru->N_TA_offset = 624/2;
    else if (frame_parms->N_RB_DL == 25)  ru->N_TA_offset = 624/4;
  } 
Raymond Knopp's avatar
Raymond Knopp committed
1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363
  if (ru->openair0_cfg.mmapped_dma == 1) {
    // replace RX signal buffers with mmaped HW versions
    
    for (i=0; i<ru->nb_rx; i++) {
      card = i/4;
      ant = i%4;
      printf("Mapping RU id %d, rx_ant %d, on card %d, chain %d\n",ru->idx,i,ru->rf_map.card+card, ru->rf_map.chain+ant);
      free(ru->common.rxdata[i]);
      ru->common.rxdata[i] = ru->openair0_cfg.rxbase[ru->rf_map.chain+ant];
      
      printf("rxdata[%d] @ %p\n",i,ru->common.rxdata[i]);
      for (j=0; j<16; j++) {
	printf("rxbuffer %d: %x\n",j,ru->common.rxdata[i][j]);
	ru->common.rxdata[i][j] = 16-j;
      }
    }
    
    for (i=0; i<ru->nb_tx; i++) {
      card = i/4;
      ant = i%4;
      printf("Mapping RU id %d, tx_ant %d, on card %d, chain %d\n",ru->idx,i,ru->rf_map.card+card, ru->rf_map.chain+ant);
      free(ru->common.txdata[i]);
      ru->common.txdata[i] = ru->openair0_cfg.txbase[ru->rf_map.chain+ant];
      
      printf("txdata[%d] @ %p\n",i,ru->common.txdata[i]);
      
      for (j=0; j<16; j++) {
	printf("txbuffer %d: %x\n",j,ru->common.txdata[i][j]);
	ru->common.txdata[i][j] = 16-j;
      }
    }
  }
  else {  // not memory-mapped DMA 
    //nothing to do, everything already allocated in lte_init
  }
  return(0);
}

1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374
static void* ru_stats_thread(void* param) {

  RU_t               *ru      = (RU_t*)param;

  wait_sync("ru_stats_thread");

  while (!oai_exit) {
     sleep(1);
     if (opp_enabled == 1) {
       if (ru->feprx) print_meas(&ru->ofdm_demod_stats,"feprx",NULL,NULL);
       if (ru->feptx_ofdm) print_meas(&ru->ofdm_mod_stats,"feptx_ofdm",NULL,NULL);
1375
       if (ru->fh_north_asynch_in) print_meas(&ru->rx_fhaul,"rx_fhaul",NULL,NULL);
1376 1377 1378 1379 1380
       if (ru->fh_north_out) {
          print_meas(&ru->tx_fhaul,"tx_fhaul",NULL,NULL);
          print_meas(&ru->compression,"compression",NULL,NULL);
          print_meas(&ru->transport,"transport",NULL,NULL);
       }
1381 1382
     }
  }
1383
  return(NULL);
1384 1385
}

Raymond Knopp's avatar
Raymond Knopp committed
1386 1387 1388 1389
static void* ru_thread( void* param ) {

  static int ru_thread_status;

1390 1391 1392 1393
  RU_t               *ru      = (RU_t*)param;
  RU_proc_t          *proc    = &ru->proc;
  LTE_DL_FRAME_PARMS *fp      = &ru->frame_parms;
  int                ret;
1394 1395
  int                subframe =9;
  int                frame    =1023; 
Raymond Knopp's avatar
Raymond Knopp committed
1396 1397 1398

  // set default return value
  ru_thread_status = 0;
Xu Bo's avatar
Xu Bo committed
1399 1400 1401
#if defined(UE_EXPANSION) || defined(UE_EXPANSION_SIM2)
  dlsch_ue_select_tbl_in_use = 1;
#endif
Raymond Knopp's avatar
Raymond Knopp committed
1402 1403 1404 1405 1406


  // set default return value
  thread_top_init("ru_thread",0,870000,1000000,1000000);

1407 1408 1409 1410 1411 1412
  LOG_I(PHY,"Starting RU %d (%s,%s),\n",ru->idx,eNB_functions[ru->function],eNB_timing[ru->if_timing]);


  // Start IF device if any
  if (ru->start_if) {
    LOG_I(PHY,"Starting IF interface for RU %d\n",ru->idx);
1413 1414 1415 1416
    AssertFatal(ru->start_if(ru,NULL) == 0, "Could not start the IF device\n");
    if (ru->if_south == LOCAL_RF) ret = connect_rau(ru);
    else ret = attach_rru(ru);
    AssertFatal(ret==0,"Cannot connect to radio\n");
1417
  }
1418
  if (ru->if_south == LOCAL_RF) { // configure RF parameters only 
1419 1420 1421
        fill_rf_config(ru,ru->rf_config_file);
        init_frame_parms(&ru->frame_parms,1);
        phy_init_RU(ru);
1422
 
1423

1424 1425 1426
        ret = openair0_device_load(&ru->rfdevice,&ru->openair0_cfg);
  }
  if (setup_RU_buffers(ru)!=0) {
1427 1428
        printf("Exiting, cannot initialize RU Buffers\n");
        exit(-1);
1429
  }
1430

1431 1432 1433 1434 1435
  LOG_I(PHY, "Signaling main thread that RU %d is ready\n",ru->idx);
  pthread_mutex_lock(&RC.ru_mutex);
  RC.ru_mask &= ~(1<<ru->idx);
  pthread_cond_signal(&RC.ru_cond);
  pthread_mutex_unlock(&RC.ru_mutex);
1436
  
Raymond Knopp's avatar
Raymond Knopp committed
1437
  wait_sync("ru_thread");
1438 1439
  

Raymond Knopp's avatar
Raymond Knopp committed
1440 1441


1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452
  // Start RF device if any
  if (ru->start_rf) {
    if (ru->start_rf(ru) != 0)
      LOG_E(HW,"Could not start the RF device\n");
    else LOG_I(PHY,"RU %d rf device ready\n",ru->idx);
  }
  else LOG_I(PHY,"RU %d no rf device\n",ru->idx);


  // if an asnych_rxtx thread exists
  // wakeup the thread because the devices are ready at this point
Raymond Knopp's avatar
Raymond Knopp committed
1453
 
1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465
  if ((ru->fh_south_asynch_in)||(ru->fh_north_asynch_in)) {
    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);
  }
  else LOG_I(PHY,"RU %d no asynch_south interface\n",ru->idx);

  // if this is a slave RRU, try to synchronize on the DL frequency
  if ((ru->is_slave) && (ru->if_south == LOCAL_RF)) do_ru_synch(ru);


Raymond Knopp's avatar
Raymond Knopp committed
1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478
  // This is a forever while loop, it loops over subframes which are scheduled by incoming samples from HW devices
  while (!oai_exit) {

    // 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.
    if (subframe==9) { 
      subframe=0;
      frame++;
      frame&=1023;
    } else {
      subframe++;
    }      

1479 1480 1481 1482
    LOG_D(PHY,"RU thread (proc %p), frame %d (%p), subframe %d (%p)\n",
	  proc, frame,&frame,subframe,&subframe);


Raymond Knopp's avatar
Raymond Knopp committed
1483
    // synchronization on input FH interface, acquire signals/data and block
1484
    if (ru->fh_south_in) ru->fh_south_in(ru,&frame,&subframe);
Raymond Knopp's avatar
Raymond Knopp committed
1485 1486
    else AssertFatal(1==0, "No fronthaul interface at south port");

1487

1488
    LOG_D(PHY,"RU thread (do_prach %d, is_prach_subframe %d), received frame %d, subframe %d\n",
1489 1490 1491
	  ru->do_prach,
	  is_prach_subframe(fp, proc->frame_rx, proc->subframe_rx),
	  proc->frame_rx,proc->subframe_rx);
1492
 
1493 1494 1495 1496
    if ((ru->do_prach>0) && (is_prach_subframe(fp, proc->frame_rx, proc->subframe_rx)==1)) wakeup_prach_ru(ru);
#ifdef Rel14
    else if ((ru->do_prach>0) && (is_prach_subframe(fp, proc->frame_rx, proc->subframe_rx)>1)) wakeup_prach_ru_br(ru);
#endif
1497 1498 1499 1500 1501

    // adjust for timing offset between RU
    if (ru->idx!=0) proc->frame_tx = (proc->frame_tx+proc->frame_offset)&1023;


Raymond Knopp's avatar
Raymond Knopp committed
1502
    // do RX front-end processing (frequency-shift, dft) if needed
1503
    if (ru->feprx) ru->feprx(ru);
Raymond Knopp's avatar
Raymond Knopp committed
1504 1505 1506 1507 1508

    // At this point, all information for subframe has been received on FH interface
    // If this proc is to provide synchronization, do so
    wakeup_slaves(proc);

Xu Bo's avatar
Xu Bo committed
1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538
#if defined(UE_EXPANSION) || defined(UE_EXPANSION_SIM2)
    new_dlsch_ue_select_tbl_in_use = dlsch_ue_select_tbl_in_use;
    dlsch_ue_select_tbl_in_use = !dlsch_ue_select_tbl_in_use;
    memcpy(&pre_scd_eNB_UE_stats,&RC.mac[ru->eNB_list[0]->Mod_id]->UE_list.eNB_UE_stats, sizeof(eNB_UE_STATS)*MAX_NUM_CCs*NUMBER_OF_UE_MAX);
    memcpy(&pre_scd_activeUE, &RC.mac[ru->eNB_list[0]->Mod_id]->UE_list.active, sizeof(boolean_t)*NUMBER_OF_UE_MAX);
    memcpy(&pre_scd_ordered_CCids, &RC.mac[ru->eNB_list[0]->Mod_id]->UE_list.ordered_CCids, sizeof(int)*MAX_NUM_CCs*NUMBER_OF_UE_MAX);
    memcpy(&pre_scd_numactiveCCs, &RC.mac[ru->eNB_list[0]->Mod_id]->UE_list.numactiveCCs, sizeof(int)*NUMBER_OF_UE_MAX);
    if (pthread_mutex_lock(&ru->eNB_list[0]->proc.mutex_pre_scd)!= 0) {
        LOG_E( MAC, "[eNB] error locking MAC proc mutex for eNB pre scd\n");
        exit_fun("error locking mutex_time");
    }

    ru->eNB_list[0]->proc.instance_pre_scd++;

    if (ru->eNB_list[0]->proc.instance_pre_scd == 0) {
        if (pthread_cond_signal(&ru->eNB_list[0]->proc.cond_pre_scd) != 0) {
            LOG_E( MAC, "[eNB] ERROR pthread_cond_signal for eNB time sync\n" );
            exit_fun( "ERROR pthread_cond_signal cond_pre_scd" );
        }
    }else{
        LOG_E( MAC, "[eNB] frame %d subframe %d rxtx busy instance_pre_scd %d\n",
               frame,subframe,ru->eNB_list[0]->proc.instance_pre_scd );
    }

    if (pthread_mutex_unlock(&ru->eNB_list[0]->proc.mutex_pre_scd)!= 0) {
        LOG_E( MAC, "[eNB] error unlocking mutex_pre_scd mutex for eNB pre scd\n");
        exit_fun("error unlocking mutex_pre_scd");
    }
#endif

Raymond Knopp's avatar
Raymond Knopp committed
1539
    // wakeup all eNB processes waiting for this RU
1540 1541
    if (ru->num_eNB>0) wakeup_eNBs(ru);

Raymond Knopp's avatar
Raymond Knopp committed
1542 1543 1544
    // wait until eNBs are finished subframe RX n and TX n+4
    wait_on_condition(&proc->mutex_eNBs,&proc->cond_eNBs,&proc->instance_cnt_eNBs,"ru_thread");

1545

Raymond Knopp's avatar
Raymond Knopp committed
1546
    // do TX front-end processing if needed (precoding and/or IDFTs)
1547 1548 1549 1550 1551 1552
    if (ru->feptx_prec) ru->feptx_prec(ru);
   
    // do OFDM if needed
    if ((ru->fh_north_asynch_in == NULL) && (ru->feptx_ofdm)) ru->feptx_ofdm(ru);
    // do outgoing fronthaul (south) if needed
    if ((ru->fh_north_asynch_in == NULL) && (ru->fh_south_out)) ru->fh_south_out(ru);
1553
 
1554
    if (ru->fh_north_out) ru->fh_north_out(ru);
1555

Raymond Knopp's avatar
Raymond Knopp committed
1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574
  }
  

  printf( "Exiting ru_thread \n");
 
  ru_thread_status = 0;
  return &ru_thread_status;

}


// This thread run the initial synchronization like a UE
void *ru_thread_synch(void *arg) {

  RU_t *ru = (RU_t*)arg;
  LTE_DL_FRAME_PARMS *fp=&ru->frame_parms;
  int32_t sync_pos,sync_pos2;
  uint32_t peak_val;
  uint32_t sync_corr[307200] __attribute__((aligned(32)));
1575
  static int ru_thread_synch_status;
Raymond Knopp's avatar
Raymond Knopp committed
1576 1577 1578 1579 1580 1581 1582


  thread_top_init("ru_thread_synch",0,5000000,10000000,10000000);

  wait_sync("ru_thread_synch");

  // initialize variables for PSS detection
1583
  lte_sync_time_init(&ru->frame_parms);
Raymond Knopp's avatar
Raymond Knopp committed
1584 1585 1586 1587

  while (!oai_exit) {

    // wait to be woken up
1588
    if (wait_on_condition(&ru->proc.mutex_synch,&ru->proc.cond_synch,&ru->proc.instance_cnt_synch,"ru_thread_synch")<0) break;
Raymond Knopp's avatar
Raymond Knopp committed
1589 1590 1591 1592 1593 1594

    // if we're not in synch, then run initial synch
    if (ru->in_synch == 0) { 
      // run intial synch like UE
      LOG_I(PHY,"Running initial synchronization\n");
      
1595
      sync_pos = lte_sync_time_eNB(ru->common.rxdata,
Raymond Knopp's avatar
Raymond Knopp committed
1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640
				   fp,
				   fp->samples_per_tti*5,
				   &peak_val,
				   sync_corr);
      LOG_I(PHY,"RU synch: %d, val %d\n",sync_pos,peak_val);

      if (sync_pos >= 0) {
	if (sync_pos >= fp->nb_prefix_samples)
	  sync_pos2 = sync_pos - fp->nb_prefix_samples;
	else
	  sync_pos2 = sync_pos + (fp->samples_per_tti*10) - fp->nb_prefix_samples;
	
	if (fp->frame_type == FDD) {
	  
	  // PSS is hypothesized in last symbol of first slot in Frame
	  int sync_pos_slot = (fp->samples_per_tti>>1) - fp->ofdm_symbol_size - fp->nb_prefix_samples;
	  
	  if (sync_pos2 >= sync_pos_slot)
	    ru->rx_offset = sync_pos2 - sync_pos_slot;
	  else
	    ru->rx_offset = (fp->samples_per_tti*10) + sync_pos2 - sync_pos_slot;
	}
	else {
	  
	}

	LOG_I(PHY,"Estimated sync_pos %d, peak_val %d => timing offset %d\n",sync_pos,peak_val,ru->rx_offset);
	
	/*
	if ((peak_val > 300000) && (sync_pos > 0)) {
	//      if (sync_pos++ > 3) {
	write_output("ru_sync.m","sync",(void*)&sync_corr[0],fp->samples_per_tti*5,1,2);
	write_output("ru_rx.m","rxs",(void*)ru->ru_time.rxdata[0][0],fp->samples_per_tti*10,1,1);
	exit(-1);
	}
	*/
	ru->in_synch=1;
      }
    }

    if (release_thread(&ru->proc.mutex_synch,&ru->proc.instance_cnt_synch,"ru_synch_thread") < 0) break;
  } // oai_exit

  lte_sync_time_free();

1641 1642 1643
  ru_thread_synch_status = 0;
  return &ru_thread_synch_status;

Raymond Knopp's avatar
Raymond Knopp committed
1644 1645 1646
}


1647 1648 1649 1650 1651 1652 1653 1654 1655 1656
 
int start_if(struct RU_t_s *ru,struct PHY_VARS_eNB_s *eNB) {
  return(ru->ifdevice.trx_start_func(&ru->ifdevice));
}

int start_rf(RU_t *ru) {
  return(ru->rfdevice.trx_start_func(&ru->rfdevice));
}

extern void fep_full(RU_t *ru);
1657
extern void ru_fep_full_2thread(RU_t *ru);
1658
extern void feptx_ofdm(RU_t *ru);
1659
extern void feptx_ofdm_2thread(RU_t *ru);
1660
extern void feptx_prec(RU_t *ru);
1661 1662
extern void init_fep_thread(RU_t *ru,pthread_attr_t *attr);
extern void init_feptx_thread(RU_t *ru,pthread_attr_t *attr);
1663 1664 1665 1666 1667 1668 1669

void init_RU_proc(RU_t *ru) {
   
  int i=0;
  RU_proc_t *proc;
  pthread_attr_t *attr_FH=NULL,*attr_prach=NULL,*attr_asynch=NULL,*attr_synch=NULL;
  //pthread_attr_t *attr_fep=NULL;
1670 1671 1672
#ifdef Rel14
  pthread_attr_t *attr_prach_br=NULL;
#endif
1673 1674 1675
  char name[100];

#ifndef OCP_FRAMEWORK
1676
  LOG_I(PHY,"Initializing RU proc %d (%s,%s),\n",ru->idx,eNB_functions[ru->function],eNB_timing[ru->if_timing]);
1677 1678 1679 1680 1681 1682
#endif
  proc = &ru->proc;
  memset((void*)proc,0,sizeof(RU_proc_t));

  proc->ru = ru;
  proc->instance_cnt_prach       = -1;
1683
  proc->instance_cnt_synch       = -1;     ;
1684 1685 1686 1687 1688 1689
  proc->instance_cnt_FH          = -1;
  proc->instance_cnt_asynch_rxtx = -1;
  proc->first_rx                 = 1;
  proc->first_tx                 = 1;
  proc->frame_offset             = 0;
  proc->num_slaves               = 0;
1690 1691
  proc->frame_tx_unwrap          = 0;

1692
  for (i=0;i<10;i++) proc->symbol_mask[i]=0;
Raymond Knopp's avatar
Raymond Knopp committed
1693
  
1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708
  pthread_mutex_init( &proc->mutex_prach, NULL);
  pthread_mutex_init( &proc->mutex_asynch_rxtx, NULL);
  pthread_mutex_init( &proc->mutex_synch,NULL);
  pthread_mutex_init( &proc->mutex_FH,NULL);
  
  pthread_cond_init( &proc->cond_prach, NULL);
  pthread_cond_init( &proc->cond_FH, NULL);
  pthread_cond_init( &proc->cond_asynch_rxtx, NULL);
  pthread_cond_init( &proc->cond_synch,NULL);
  
  pthread_attr_init( &proc->attr_FH);
  pthread_attr_init( &proc->attr_prach);
  pthread_attr_init( &proc->attr_synch);
  pthread_attr_init( &proc->attr_asynch_rxtx);
  pthread_attr_init( &proc->attr_fep);
1709 1710 1711 1712 1713 1714 1715

#ifdef Rel14
  proc->instance_cnt_prach_br       = -1;
  pthread_mutex_init( &proc->mutex_prach_br, NULL);
  pthread_cond_init( &proc->cond_prach_br, NULL);
  pthread_attr_init( &proc->attr_prach_br);
#endif  
1716 1717
  
#ifndef DEADLINE_SCHEDULER
1718 1719 1720 1721 1722 1723 1724
  attr_FH        = &proc->attr_FH;
  attr_prach     = &proc->attr_prach;
  attr_synch     = &proc->attr_synch;
  attr_asynch    = &proc->attr_asynch_rxtx;
#ifdef Rel14
  attr_prach_br  = &proc->attr_prach_br;
#endif
1725 1726 1727
#endif
  
  pthread_create( &proc->pthread_FH, attr_FH, ru_thread, (void*)ru );
Raymond Knopp's avatar
Raymond Knopp committed
1728

1729 1730
  if (ru->function == NGFI_RRU_IF4p5) {
    pthread_create( &proc->pthread_prach, attr_prach, ru_thread_prach, (void*)ru );
1731 1732 1733
#ifdef Rel14  
    pthread_create( &proc->pthread_prach_br, attr_prach_br, ru_thread_prach_br, (void*)ru );
#endif
1734 1735 1736 1737 1738
    if (ru->is_slave == 1) pthread_create( &proc->pthread_synch, attr_synch, ru_thread_synch, (void*)ru);
    
    
    if ((ru->if_timing == synch_to_other) ||
	(ru->function == NGFI_RRU_IF5) ||
1739
	(ru->function == NGFI_RRU_IF4p5)) pthread_create( &proc->pthread_asynch_rxtx, attr_asynch, ru_thread_asynch_rxtx, (void*)ru );
1740 1741 1742 1743
    
    snprintf( name, sizeof(name), "ru_thread_FH %d", ru->idx );
    pthread_setname_np( proc->pthread_FH, name );
    
Raymond Knopp's avatar
Raymond Knopp committed
1744
  }
1745

1746 1747 1748 1749
  if (get_nprocs()>=2) { 
    if (ru->feprx) init_fep_thread(ru,NULL); 
    if (ru->feptx_ofdm) init_feptx_thread(ru,NULL);
  } 
1750
  if (opp_enabled == 1) pthread_create(&ru->ru_stats_thread,NULL,ru_stats_thread,(void*)ru); 
Raymond Knopp's avatar
Raymond Knopp committed
1751
  
1752 1753
}

1754

1755 1756


Raymond Knopp's avatar
Raymond Knopp committed
1757

1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797
int check_capabilities(RU_t *ru,RRU_capabilities_t *cap) {

  FH_fmt_options_t fmt = cap->FH_fmt;

  int i;
  int found_band=0;

  LOG_I(PHY,"RRU %d, num_bands %d, looking for band %d\n",ru->idx,cap->num_bands,ru->frame_parms.eutra_band);
  for (i=0;i<cap->num_bands;i++) {
    LOG_I(PHY,"band %d on RRU %d\n",cap->band_list[i],ru->idx);
    if (ru->frame_parms.eutra_band == cap->band_list[i]) {
      found_band=1;
      break;
    }
  }

  if (found_band == 0) {
    LOG_I(PHY,"Couldn't find target EUTRA band %d on RRU %d\n",ru->frame_parms.eutra_band,ru->idx);
    return(-1);
  }

  switch (ru->if_south) {
  case LOCAL_RF:
    AssertFatal(1==0, "This RU should not have a local RF, exiting\n");
    return(0);
    break;
  case REMOTE_IF5:
    if (fmt == OAI_IF5_only || fmt == OAI_IF5_and_IF4p5) return(0);
    break;
  case REMOTE_IF4p5:
    if (fmt == OAI_IF4p5_only || fmt == OAI_IF5_and_IF4p5) return(0);
    break;
  case REMOTE_MBP_IF5:
    if (fmt == MBP_IF5) return(0);
    break;
  default:
    LOG_I(PHY,"No compatible Fronthaul interface found for RRU %d\n", ru->idx);
    return(-1);
  }

Raymond Knopp's avatar
Raymond Knopp committed
1798
  return(-1);
Raymond Knopp's avatar
Raymond Knopp committed
1799 1800 1801
}


1802
char rru_format_options[4][20] = {"OAI_IF5_only","OAI_IF4p5_only","OAI_IF5_and_IF4p5","MBP_IF5"};
1803

1804
char rru_formats[3][20] = {"OAI_IF5","MBP_IF5","OAI_IF4p5"};
1805
char ru_if_formats[4][20] = {"LOCAL_RF","REMOTE_OAI_IF5","REMOTE_MBP_IF5","REMOTE_OAI_IF4p5"};
1806 1807 1808 1809 1810 1811 1812 1813

void configure_ru(int idx,
		  void *arg) {

  RU_t               *ru           = RC.ru[idx];
  RRU_config_t       *config       = (RRU_config_t *)arg;
  RRU_capabilities_t *capabilities = (RRU_capabilities_t*)arg;
  int ret;
1814
  int i;
1815 1816 1817 1818 1819

  LOG_I(PHY, "Received capabilities from RRU %d\n",idx);


  if (capabilities->FH_fmt < MAX_FH_FMTs) LOG_I(PHY, "RU FH options %s\n",rru_format_options[capabilities->FH_fmt]);
1820

Raymond Knopp's avatar
Raymond Knopp committed
1821 1822
  AssertFatal((ret=check_capabilities(ru,capabilities)) == 0,
	      "Cannot configure RRU %d, check_capabilities returned %d\n", idx,ret);
1823 1824 1825 1826
  // take antenna capabilities of RRU
  ru->nb_tx                      = capabilities->nb_tx[0];
  ru->nb_rx                      = capabilities->nb_rx[0];

Raymond Knopp's avatar
Raymond Knopp committed
1827 1828 1829 1830 1831 1832 1833 1834
  // Pass configuration to RRU
  LOG_I(PHY, "Using %s fronthaul (%d), band %d \n",ru_if_formats[ru->if_south],ru->if_south,ru->frame_parms.eutra_band);
  // wait for configuration 
  config->FH_fmt                 = ru->if_south;
  config->num_bands              = 1;
  config->band_list[0]           = ru->frame_parms.eutra_band;
  config->tx_freq[0]             = ru->frame_parms.dl_CarrierFreq;      
  config->rx_freq[0]             = ru->frame_parms.ul_CarrierFreq;      
1835 1836
  config->tdd_config[0]          = ru->frame_parms.tdd_config;
  config->tdd_config_S[0]        = ru->frame_parms.tdd_config_S;
Raymond Knopp's avatar
Raymond Knopp committed
1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847
  config->att_tx[0]              = ru->att_tx;
  config->att_rx[0]              = ru->att_rx;
  config->N_RB_DL[0]             = ru->frame_parms.N_RB_DL;
  config->N_RB_UL[0]             = ru->frame_parms.N_RB_UL;
  config->threequarter_fs[0]     = ru->frame_parms.threequarter_fs;
  if (ru->if_south==REMOTE_IF4p5) {
    config->prach_FreqOffset[0]  = ru->frame_parms.prach_config_common.prach_ConfigInfo.prach_FreqOffset;
    config->prach_ConfigIndex[0] = ru->frame_parms.prach_config_common.prach_ConfigInfo.prach_ConfigIndex;
    LOG_I(PHY,"REMOTE_IF4p5: prach_FrequOffset %d, prach_ConfigIndex %d\n",
	  config->prach_FreqOffset[0],config->prach_ConfigIndex[0]);
    
1848
#ifdef Rel14
Raymond Knopp's avatar
Raymond Knopp committed
1849 1850 1851 1852
    for (i=0;i<4;i++) {
      config->emtc_prach_CElevel_enable[0][i]  = ru->frame_parms.prach_emtc_config_common.prach_ConfigInfo.prach_CElevel_enable[i];
      config->emtc_prach_FreqOffset[0][i]      = ru->frame_parms.prach_emtc_config_common.prach_ConfigInfo.prach_FreqOffset[i];
      config->emtc_prach_ConfigIndex[0][i]     = ru->frame_parms.prach_emtc_config_common.prach_ConfigInfo.prach_ConfigIndex[i];
1853
    }
Raymond Knopp's avatar
Raymond Knopp committed
1854
#endif
1855 1856 1857 1858 1859 1860
  }

  init_frame_parms(&ru->frame_parms,1);
  phy_init_RU(ru);
}

1861 1862
void configure_rru(int idx,
		   void *arg) {
1863 1864 1865 1866 1867 1868 1869

  RRU_config_t *config = (RRU_config_t *)arg;
  RU_t         *ru         = RC.ru[idx];

  ru->frame_parms.eutra_band                                               = config->band_list[0];
  ru->frame_parms.dl_CarrierFreq                                           = config->tx_freq[0];
  ru->frame_parms.ul_CarrierFreq                                           = config->rx_freq[0];
1870 1871 1872 1873 1874 1875 1876
  if (ru->frame_parms.dl_CarrierFreq == ru->frame_parms.ul_CarrierFreq) {
     ru->frame_parms.frame_type                                            = TDD;
     ru->frame_parms.tdd_config                                            = config->tdd_config[0];
     ru->frame_parms.tdd_config_S                                          = config->tdd_config_S[0]; 
  }
  else
     ru->frame_parms.frame_type                                            = FDD;
1877 1878 1879 1880 1881 1882 1883
  ru->att_tx                                                               = config->att_tx[0];
  ru->att_rx                                                               = config->att_rx[0];
  ru->frame_parms.N_RB_DL                                                  = config->N_RB_DL[0];
  ru->frame_parms.N_RB_UL                                                  = config->N_RB_UL[0];
  ru->frame_parms.threequarter_fs                                          = config->threequarter_fs[0];
  ru->frame_parms.pdsch_config_common.referenceSignalPower                 = ru->max_pdschReferenceSignalPower-config->att_tx[0];
  if (ru->function==NGFI_RRU_IF4p5) {
1884 1885
    LOG_I(PHY,"Setting ru->function to NGFI_RRU_IF4p5, prach_FrequOffset %d, prach_ConfigIndex %d\n",
	  config->prach_FreqOffset[0],config->prach_ConfigIndex[0]);
1886 1887
    ru->frame_parms.prach_config_common.prach_ConfigInfo.prach_FreqOffset  = config->prach_FreqOffset[0]; 
    ru->frame_parms.prach_config_common.prach_ConfigInfo.prach_ConfigIndex = config->prach_ConfigIndex[0]; 
1888 1889 1890 1891 1892 1893 1894
#ifdef Rel14
    for (int i=0;i<4;i++) {
      ru->frame_parms.prach_emtc_config_common.prach_ConfigInfo.prach_CElevel_enable[i] = config->emtc_prach_CElevel_enable[0][i];
      ru->frame_parms.prach_emtc_config_common.prach_ConfigInfo.prach_FreqOffset[i]     = config->emtc_prach_FreqOffset[0][i];
      ru->frame_parms.prach_emtc_config_common.prach_ConfigInfo.prach_ConfigIndex[i]    = config->emtc_prach_ConfigIndex[0][i];
    }
#endif
1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915
  }
  
  init_frame_parms(&ru->frame_parms,1);


  phy_init_RU(ru);

}

void init_precoding_weights(PHY_VARS_eNB *eNB) {

  int layer,ru_id,aa,re,ue,tb;
  LTE_DL_FRAME_PARMS *fp=&eNB->frame_parms;
  RU_t *ru;
  LTE_eNB_DLSCH_t *dlsch;

  // init precoding weigths
  for (ue=0;ue<NUMBER_OF_UE_MAX;ue++) {
    for (tb=0;tb<2;tb++) {
      dlsch = eNB->dlsch[ue][tb];
      for (layer=0; layer<4; layer++) {
1916 1917
	int nb_tx=0;
	for (ru_id=0;ru_id<RC.nb_RU;ru_id++) { 
1918
	  ru = RC.ru[ru_id];
1919 1920 1921
	  nb_tx+=ru->nb_tx;
	}
	dlsch->ue_spec_bf_weights[layer] = (int32_t**)malloc16(nb_tx*sizeof(int32_t*));
1922
	  
1923 1924 1925 1926
	for (aa=0; aa<nb_tx; aa++) {
	  dlsch->ue_spec_bf_weights[layer][aa] = (int32_t *)malloc16(fp->ofdm_symbol_size*sizeof(int32_t));
	  for (re=0;re<fp->ofdm_symbol_size; re++) {
	    dlsch->ue_spec_bf_weights[layer][aa][re] = 0x00007fff;
1927
	  }
1928
	}	
1929 1930 1931 1932 1933
      }
    }
  }
}

Raymond Knopp's avatar
Raymond Knopp committed
1934 1935 1936
extern void RCconfig_RU(void);

void init_RU(char *rf_config_file) {
Raymond Knopp's avatar
Raymond Knopp committed
1937 1938
  
  int ru_id;
1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949
  RU_t *ru;
  int ret;
  PHY_VARS_eNB *eNB0;
  int i;
  int CC_id;

  // create status mask
  RC.ru_mask = 0;
  pthread_mutex_init(&RC.ru_mutex,NULL);
  pthread_cond_init(&RC.ru_cond,NULL);

1950 1951
  // read in configuration file)
  printf("configuring RU from file\n");
1952
  RCconfig_RU();
1953
  LOG_I(PHY,"number of L1 instances %d, number of RU %d, number of CPU cores %d\n",RC.nb_L1_inst,RC.nb_RU,get_nprocs());
1954

1955
  for (i=0;i<RC.nb_L1_inst;i++) 
1956 1957 1958 1959
    for (CC_id=0;CC_id<RC.nb_CC[i];CC_id++) RC.eNB[i][CC_id]->num_RU=0;

  for (ru_id=0;ru_id<RC.nb_RU;ru_id++) {
    ru               = RC.ru[ru_id];
1960
    ru->rf_config_file = rf_config_file;
1961 1962 1963 1964
    ru->idx          = ru_id;              
    ru->ts_offset    = 0;
    // use eNB_list[0] as a reference for RU frame parameters
    // NOTE: multiple CC_id are not handled here yet!
Raymond Knopp's avatar
Raymond Knopp committed
1965 1966

    
1967
    eNB0             = ru->eNB_list[0];
1968
    if ((ru->function != NGFI_RRU_IF5) && (ru->function != NGFI_RRU_IF4p5))
1969
      AssertFatal(eNB0!=NULL,"eNB0 is null!\n");
1970

1971 1972 1973
    if (eNB0) {
      LOG_I(PHY,"Copying frame parms from eNB %d to ru %d\n",eNB0->Mod_id,ru->idx);
      memcpy((void*)&ru->frame_parms,(void*)&eNB0->frame_parms,sizeof(LTE_DL_FRAME_PARMS));
1974 1975 1976 1977 1978 1979

      // attach all RU to all eNBs in its list/
      for (i=0;i<ru->num_eNB;i++) {
	eNB0 = ru->eNB_list[i];
	eNB0->RU_list[eNB0->num_RU++] = ru;
      }
1980
    }
1981
    //    LOG_I(PHY,"Initializing RRU descriptor %d : (%s,%s,%d)\n",ru_id,ru_if_types[ru->if_south],eNB_timing[ru->if_timing],ru->function);
1982 1983 1984

    
    switch (ru->if_south) {
Raymond Knopp's avatar
Raymond Knopp committed
1985
    case LOCAL_RF:   // this is an RU with integrated RF (RRU, eNB)
1986 1987
      if (ru->function ==  NGFI_RRU_IF5) {                 // IF5 RRU
	ru->do_prach              = 0;                      // no prach processing in RU
1988
	ru->fh_north_in           = NULL;                   // no shynchronous incoming fronthaul from north
1989 1990 1991 1992 1993 1994
	ru->fh_north_out          = fh_if5_north_out;       // need only to do send_IF5  reception
	ru->fh_south_out          = tx_rf;                  // send output to RF
	ru->fh_north_asynch_in    = fh_if5_north_asynch_in; // TX packets come asynchronously 
	ru->feprx                 = NULL;                   // nothing (this is a time-domain signal)
	ru->feptx_ofdm            = NULL;                   // nothing (this is a time-domain signal)
	ru->feptx_prec            = NULL;                   // nothing (this is a time-domain signal)
Raymond Knopp's avatar
Raymond Knopp committed
1995
	ru->start_if              = start_if;               // need to start the if interface for if5
1996 1997 1998
	ru->ifdevice.host_type    = RRU_HOST;
	ru->rfdevice.host_type    = RRU_HOST;
	ru->ifdevice.eth_params   = &ru->eth_params;
1999 2000
    reset_meas(&ru->rx_fhaul);
    reset_meas(&ru->tx_fhaul);
2001 2002
    reset_meas(&ru->compression);
    reset_meas(&ru->transport);
2003 2004 2005 2006 2007 2008 2009

	ret = openair0_transport_load(&ru->ifdevice,&ru->openair0_cfg,&ru->eth_params);
	printf("openair0_transport_init returns %d for ru_id %d\n",ret,ru_id);
	if (ret<0) {
	  printf("Exiting, cannot initialize transport protocol\n");
	  exit(-1);
	}
Raymond Knopp's avatar
Raymond Knopp committed
2010
      }
2011 2012 2013 2014 2015 2016
      else if (ru->function == NGFI_RRU_IF4p5) {
	ru->do_prach              = 1;                        // do part of prach processing in RU
	ru->fh_north_in           = NULL;                     // no synchronous incoming fronthaul from north
	ru->fh_north_out          = fh_if4p5_north_out;       // send_IF4p5 on reception
	ru->fh_south_out          = tx_rf;                    // send output to RF
	ru->fh_north_asynch_in    = fh_if4p5_north_asynch_in; // TX packets come asynchronously
2017 2018
	ru->feprx                 = (get_nprocs()<=2) ? fep_full :ru_fep_full_2thread;                 // RX DFTs
	ru->feptx_ofdm            = (get_nprocs()<=2) ? feptx_ofdm : feptx_ofdm_2thread;               // this is fep with idft only (no precoding in RRU)
2019 2020 2021 2022 2023
	ru->feptx_prec            = NULL;
	ru->start_if              = start_if;                 // need to start the if interface for if4p5
	ru->ifdevice.host_type    = RRU_HOST;
	ru->rfdevice.host_type    = RRU_HOST;
	ru->ifdevice.eth_params   = &ru->eth_params;
2024 2025
    reset_meas(&ru->rx_fhaul);
    reset_meas(&ru->tx_fhaul);
2026 2027
    reset_meas(&ru->compression);
    reset_meas(&ru->transport);
2028 2029 2030 2031 2032 2033 2034 2035

	ret = openair0_transport_load(&ru->ifdevice,&ru->openair0_cfg,&ru->eth_params);
	printf("openair0_transport_init returns %d for ru_id %d\n",ret,ru_id);
	if (ret<0) {
	  printf("Exiting, cannot initialize transport protocol\n");
	  exit(-1);
	}
	malloc_IF4p5_buffer(ru);
Raymond Knopp's avatar
Raymond Knopp committed
2036
      }
2037 2038
      else if (ru->function == eNodeB_3GPP) {  
	ru->do_prach             = 0;                       // no prach processing in RU            
2039 2040
	ru->feprx                = (get_nprocs()<=2) ? fep_full : ru_fep_full_2thread;                // RX DFTs
	ru->feptx_ofdm           = (get_nprocs()<=2) ? feptx_ofdm : feptx_ofdm_2thread;              // this is fep with idft and precoding
2041
	ru->feptx_prec           = feptx_prec;              // this is fep with idft and precoding
Raymond Knopp's avatar
Raymond Knopp committed
2042 2043 2044
	ru->fh_north_in          = NULL;                    // no incoming fronthaul from north
	ru->fh_north_out         = NULL;                    // no outgoing fronthaul to north
	ru->start_if             = NULL;                    // no if interface
2045
	ru->rfdevice.host_type   = RAU_HOST;
Raymond Knopp's avatar
Raymond Knopp committed
2046 2047
      }
      ru->fh_south_in            = rx_rf;                               // local synchronous RF RX
2048
      ru->fh_south_out           = tx_rf;                               // local synchronous RF TX
Raymond Knopp's avatar
Raymond Knopp committed
2049
      ru->start_rf               = start_rf;                            // need to start the local RF interface
2050
      printf("configuring ru_id %d (start_rf %p)\n",ru_id,start_rf);
2051
/*
2052 2053 2054 2055 2056
      if (ru->function == eNodeB_3GPP) { // configure RF parameters only for 3GPP eNodeB, we need to get them from RAU otherwise
	fill_rf_config(ru,rf_config_file);      
	init_frame_parms(&ru->frame_parms,1);
	phy_init_RU(ru);
      }
Raymond Knopp's avatar
Raymond Knopp committed
2057

2058 2059 2060
      ret = openair0_device_load(&ru->rfdevice,&ru->openair0_cfg);
      if (setup_RU_buffers(ru)!=0) {
	printf("Exiting, cannot initialize RU Buffers\n");
Raymond Knopp's avatar
Raymond Knopp committed
2061
	exit(-1);
2062
      }*/
Raymond Knopp's avatar
Raymond Knopp committed
2063 2064 2065
      break;

    case REMOTE_IF5: // the remote unit is IF5 RRU
2066
      ru->do_prach               = 0;
2067
      ru->feprx                  = (get_nprocs()<=2) ? fep_full : fep_full;                   // this is frequency-shift + DFTs
2068
      ru->feptx_prec             = feptx_prec;                 // need to do transmit Precoding + IDFTs 
2069
      ru->feptx_ofdm             = (get_nprocs()<=2) ? feptx_ofdm : feptx_ofdm_2thread;                 // need to do transmit Precoding + IDFTs 
2070 2071 2072 2073
      if (ru->if_timing == synch_to_other) {
	ru->fh_south_in          = fh_slave_south_in;                  // synchronize to master
	ru->fh_south_out         = fh_if5_mobipass_south_out;          // use send_IF5 for mobipass
	ru->fh_south_asynch_in   = fh_if5_south_asynch_in_mobipass;    // UL is asynchronous
Raymond Knopp's avatar
Raymond Knopp committed
2074 2075
      }
      else {
2076 2077 2078
	ru->fh_south_in          = fh_if5_south_in;     // synchronous IF5 reception
	ru->fh_south_out         = fh_if5_south_out;    // synchronous IF5 transmission
	ru->fh_south_asynch_in   = NULL;                // no asynchronous UL
Raymond Knopp's avatar
Raymond Knopp committed
2079
      }
2080 2081 2082 2083 2084
      ru->start_rf               = NULL;                 // no local RF
      ru->start_if               = start_if;             // need to start if interface for IF5 
      ru->ifdevice.host_type     = RAU_HOST;
      ru->ifdevice.eth_params    = &ru->eth_params;
      ru->ifdevice.configure_rru = configure_ru;
Raymond Knopp's avatar
Raymond Knopp committed
2085

2086
      ret = openair0_transport_load(&ru->ifdevice,&ru->openair0_cfg,&ru->eth_params);
Raymond Knopp's avatar
Raymond Knopp committed
2087 2088 2089 2090 2091 2092 2093 2094
      printf("openair0_transport_init returns %d for ru_id %d\n",ret,ru_id);
      if (ret<0) {
	printf("Exiting, cannot initialize transport protocol\n");
	exit(-1);
      }
      break;

    case REMOTE_IF4p5:
2095 2096 2097 2098 2099 2100 2101 2102 2103 2104 2105 2106 2107 2108 2109 2110
      ru->do_prach               = 0;
      ru->feprx                  = NULL;                // DFTs
      ru->feptx_prec             = feptx_prec;          // Precoding operation
      ru->feptx_ofdm             = NULL;                // no OFDM mod
      ru->fh_south_in            = fh_if4p5_south_in;   // synchronous IF4p5 reception
      ru->fh_south_out           = fh_if4p5_south_out;  // synchronous IF4p5 transmission
      ru->fh_south_asynch_in     = (ru->if_timing == synch_to_other) ? fh_if4p5_south_in : NULL;                // asynchronous UL if synch_to_other
      ru->fh_north_out           = NULL;
      ru->fh_north_asynch_in     = NULL;
      ru->start_rf               = NULL;                // no local RF
      ru->start_if               = start_if;            // need to start if interface for IF4p5 
      ru->ifdevice.host_type     = RAU_HOST;
      ru->ifdevice.eth_params    = &ru->eth_params;
      ru->ifdevice.configure_rru = configure_ru;

      ret = openair0_transport_load(&ru->ifdevice, &ru->openair0_cfg, &ru->eth_params);
Raymond Knopp's avatar
Raymond Knopp committed
2111 2112 2113 2114 2115 2116
      printf("openair0_transport_init returns %d for ru_id %d\n",ret,ru_id);
      if (ret<0) {
	printf("Exiting, cannot initialize transport protocol\n");
	exit(-1);
      }
      
2117
      malloc_IF4p5_buffer(ru);
Raymond Knopp's avatar
Raymond Knopp committed
2118 2119 2120
      
      break;

2121 2122
    default:
      LOG_E(PHY,"RU with invalid or unknown southbound interface type %d\n",ru->if_south);
Raymond Knopp's avatar
Raymond Knopp committed
2123 2124 2125
      break;
    } // switch on interface type 

2126 2127 2128 2129 2130 2131
    LOG_I(PHY,"Starting ru_thread %d\n",ru_id);

    init_RU_proc(ru);



Raymond Knopp's avatar
Raymond Knopp committed
2132 2133
  } // for ru_id

2134
  //  sleep(1);
2135
  LOG_D(HW,"[lte-softmodem.c] RU threads created\n");
Raymond Knopp's avatar
Raymond Knopp committed
2136 2137 2138 2139 2140 2141 2142 2143 2144 2145 2146 2147
  

}




void stop_ru(RU_t *ru) {

  printf("Stopping RU %p processing threads\n",(void*)ru);
  
}
2148