lte-ru.c 71.8 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

}
Raymond Knopp's avatar
Raymond Knopp committed
670 671
void rx_rf(RU_t *ru,int *frame,int *subframe) {

672
  RU_proc_t *proc = &ru->proc;
Raymond Knopp's avatar
Raymond Knopp committed
673
  LTE_DL_FRAME_PARMS *fp = &ru->frame_parms;
674
  void *rxp[ru->nb_rx];
675
  unsigned int rxs;
Raymond Knopp's avatar
Raymond Knopp committed
676
  int i;
677
  openair0_timestamp ts,old_ts;
Raymond Knopp's avatar
Raymond Knopp committed
678
    
679
  for (i=0; i<ru->nb_rx; i++)
680
    rxp[i] = (void*)&ru->common.rxdata[i][*subframe*fp->samples_per_tti];
Raymond Knopp's avatar
Raymond Knopp committed
681 682 683
  
  VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME( VCD_SIGNAL_DUMPER_FUNCTIONS_TRX_READ, 1 );

684 685
  old_ts = proc->timestamp_rx;

Raymond Knopp's avatar
Raymond Knopp committed
686
  rxs = ru->rfdevice.trx_read_func(&ru->rfdevice,
687
				   &ts,
Raymond Knopp's avatar
Raymond Knopp committed
688 689
				   rxp,
				   fp->samples_per_tti,
690
				   ru->nb_rx);
Raymond Knopp's avatar
Raymond Knopp committed
691 692 693
  
  VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME( VCD_SIGNAL_DUMPER_FUNCTIONS_TRX_READ, 0 );
 
694 695
  proc->timestamp_rx = ts-ru->ts_offset;

696 697
  AssertFatal(rxs == fp->samples_per_tti,
	      "rx_rf: Asked for %d samples, got %d from USRP\n",fp->samples_per_tti,rxs);
698 699

  if (proc->first_rx == 1) {
700
    ru->ts_offset = proc->timestamp_rx;
701 702 703 704 705 706 707 708 709 710 711 712
    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
713 714
  // synchronize first reception to frame 0 subframe 0

715 716 717
  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;
718 719 720 721 722 723
  
  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);
724

725 726 727 728
    // 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
729 730
    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 );
731
  }
Raymond Knopp's avatar
Raymond Knopp committed
732 733 734
  
  if (proc->first_rx == 0) {
    if (proc->subframe_rx != *subframe){
735
      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
736 737 738 739
      exit_fun("Exiting");
    }
    
    if (proc->frame_rx != *frame) {
740
      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
741 742 743 744 745 746 747 748 749 750
      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);
  
751
  VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME( VCD_SIGNAL_DUMPER_VARIABLES_TRX_TS, proc->timestamp_rx&0xffffffff );
Raymond Knopp's avatar
Raymond Knopp committed
752 753 754 755 756 757 758 759 760
  
  if (rxs != fp->samples_per_tti)
    exit_fun( "problem receiving samples" );
  

  
}


761 762 763 764
void tx_rf(RU_t *ru) {

  RU_proc_t *proc = &ru->proc;
  LTE_DL_FRAME_PARMS *fp = &ru->frame_parms;
765
  void *txp[ru->nb_tx]; 
766 767 768
  unsigned int txs;
  int i;

Cedric Roux's avatar
Cedric Roux committed
769 770 771
  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));

772 773 774
  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);
775 776
  int sf_extension = 0;

777 778 779 780 781 782 783 784 785 786 787 788 789
  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) &&
790
	(nextSF_type == SF_DL)) { 
791
      flags = 2; // start of burst
792 793
      sf_extension = ru->N_TA_offset<<1;
    }
794 795 796 797
    
    if ((fp->frame_type == TDD) &&
	(SF_type == SF_DL)&&
	(prevSF_type == SF_UL) &&
798
	(nextSF_type == SF_UL)) {
799
      flags = 4; // start of burst and end of burst (only one DL SF between two UL)
800 801 802 803 804 805
      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];

806
    
807 808 809 810 811
    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,
812
				      proc->timestamp_tx+ru->ts_offset-ru->openair0_cfg.tx_sample_advance-sf_extension,
813
				      txp,
814
				      siglen+sf_extension,
815 816 817 818
				      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
819
	  (long long unsigned int)proc->timestamp_tx,proc->frame_tx,proc->frame_tx_unwrap,proc->subframe_tx);
820
    VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME( VCD_SIGNAL_DUMPER_FUNCTIONS_TRX_WRITE, 0 );
821
    
822
    
823
    AssertFatal(txs ==  siglen+sf_extension,"TX : Timeout (sent %d/%d)\n",txs, siglen);
824

825
  }
826 827 828
}


Raymond Knopp's avatar
Raymond Knopp committed
829 830 831 832 833 834 835 836 837 838
/*!
 * \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;

839 840 841
  RU_t *ru         = (RU_t*)param;
  RU_proc_t *proc  = &ru->proc;

Raymond Knopp's avatar
Raymond Knopp committed
842 843 844 845


  int subframe=0, frame=0; 

846
  thread_top_init("ru_thread_asynch_rxtx",1,870000L,1000000L,1000000L);
Raymond Knopp's avatar
Raymond Knopp committed
847 848 849

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

850
  wait_sync("ru_thread_asynch_rxtx");
Raymond Knopp's avatar
Raymond Knopp committed
851 852

  // wait for top-level synchronization and do one acquisition to get timestamp for setting frame/subframe
853
  printf( "waiting for devices (ru_thread_asynch_rx)\n");
Raymond Knopp's avatar
Raymond Knopp committed
854 855 856

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

857
  printf( "devices ok (ru_thread_asynch_rx)\n");
Raymond Knopp's avatar
Raymond Knopp committed
858 859 860 861 862 863 864 865 866 867 868 869 870


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

    if (subframe==9) { 
      subframe=0;
      frame++;
      frame&=1023;
    } else {
      subframe++;
    }      
871
    LOG_D(PHY,"ru_thread_asynch_rxtx: Waiting on incoming fronthaul\n");
872 873 874
    // 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)
875 876 877 878
    else if (ru->fh_north_asynch_in) {
       if (subframe_select(&ru->frame_parms,subframe)!=SF_UL)
         ru->fh_north_asynch_in(ru,&frame,&subframe);
    }
879
    else AssertFatal(1==0,"Unknown function in ru_thread_asynch_rxtx\n");
Raymond Knopp's avatar
Raymond Knopp committed
880 881 882 883 884 885 886 887 888
  }

  ru_thread_asynch_rxtx_status=0;
  return(&ru_thread_asynch_rxtx_status);
}




889
void wakeup_slaves(RU_proc_t *proc) {
Raymond Knopp's avatar
Raymond Knopp committed
890 891 892 893 894 895 896 897

  int i;
  struct timespec wait;
  
  wait.tv_sec=0;
  wait.tv_nsec=5000000L;
  
  for (i=0;i<proc->num_slaves;i++) {
898
    RU_proc_t *slave_proc = proc->slave_proc[i];
Raymond Knopp's avatar
Raymond Knopp committed
899 900 901
    // 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) {
902
      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
903 904 905 906 907 908 909 910 911 912 913 914 915 916 917
      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) {
918
	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
919 920 921 922
          exit_fun( "ERROR pthread_cond_signal" );
	  break;
      }
    } else {
923
      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
924 925 926 927 928 929 930 931
      exit_fun( "FH thread busy" );
      break;
    }             
  }
}

/*!
 * \brief The prach receive thread of RU.
932
 * \param param is a \ref RU_proc_t structure which contains the info what to process.
Raymond Knopp's avatar
Raymond Knopp committed
933 934 935
 * \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 ) {
936

Raymond Knopp's avatar
Raymond Knopp committed
937 938
  static int ru_thread_prach_status;

939 940
  RU_t *ru        = (RU_t*)param;
  RU_proc_t *proc = (RU_proc_t*)&ru->proc;
Raymond Knopp's avatar
Raymond Knopp committed
941 942

  // set default return value
943
  ru_thread_prach_status = 0;
Raymond Knopp's avatar
Raymond Knopp committed
944

945
  thread_top_init("ru_thread_prach",1,500000L,1000000L,20000000L);
Raymond Knopp's avatar
Raymond Knopp committed
946 947 948 949

  while (!oai_exit) {
    
    if (oai_exit) break;
950
    if (wait_on_condition(&proc->mutex_prach,&proc->cond_prach,&proc->instance_cnt_prach,"ru_prach_thread") < 0) break;
951
    VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME( VCD_SIGNAL_DUMPER_FUNCTIONS_PHY_RU_PRACH_RX, 1 );      
952 953
    rx_prach(NULL,
	     ru,
954
	     NULL,
955 956 957
             NULL,
             NULL,
             proc->frame_prach,
958 959 960 961 962
             0
#ifdef Rel14
	     ,0
#endif
	     );
963
    VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME( VCD_SIGNAL_DUMPER_FUNCTIONS_PHY_RU_PRACH_RX, 0 );      
964
    if (release_thread(&proc->mutex_prach,&proc->instance_cnt_prach,"ru_prach_thread") < 0) break;
Raymond Knopp's avatar
Raymond Knopp committed
965 966
  }

967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001
  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
1002

1003 1004
  ru_thread_prach_status = 0;
  return &ru_thread_prach_status;
Raymond Knopp's avatar
Raymond Knopp committed
1005
}
1006
#endif
Raymond Knopp's avatar
Raymond Knopp committed
1007

1008
int wakeup_synch(RU_t *ru){
Raymond Knopp's avatar
Raymond Knopp committed
1009

1010 1011 1012 1013
  struct timespec wait;
  
  wait.tv_sec=0;
  wait.tv_nsec=5000000L;
Raymond Knopp's avatar
Raymond Knopp committed
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
  // 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
1042 1043
  void *rxp[2],*rxp2[2];
  int32_t dummy_rx[ru->nb_rx][fp->samples_per_tti] __attribute__((aligned(32)));
1044 1045
  int rxs;
  int ic;
Raymond Knopp's avatar
Raymond Knopp committed
1046 1047 1048

  // initialize the synchronization buffer to the common_vars.rxdata
  for (int i=0;i<ru->nb_rx;i++)
1049
    rxp[i] = &ru->common.rxdata[i][0];
Raymond Knopp's avatar
Raymond Knopp committed
1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065

  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);
1066 1067
    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
1068 1069 1070 1071 1072 1073 1074 1075
    // 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
      
1076
      for (i=0; i<ru->nb_rx; i++)
Raymond Knopp's avatar
Raymond Knopp committed
1077 1078 1079 1080 1081 1082 1083
	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);
1084 1085 1086
      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
1087 1088 1089 1090 1091 1092 1093 1094
    } // 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,
1095
				   ru->nb_rx);
Raymond Knopp's avatar
Raymond Knopp committed
1096 1097 1098 1099 1100 1101 1102 1103 1104
  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);

}

1105 1106 1107 1108 1109 1110 1111


void wakeup_eNBs(RU_t *ru) {

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

1112 1113
  LOG_D(PHY,"wakeup_eNBs (num %d) for RU %d\n",ru->num_eNB,ru->idx);

1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124
  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
1125
      if (ru->wakeup_rxtx(eNB_list[i],ru) < 0)
1126 1127 1128 1129
	LOG_E(PHY,"could not wakeup eNB rxtx process for subframe %d\n", ru->proc.subframe_rx);
  }
}

1130
static inline int wakeup_prach_ru(RU_t *ru) {
1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141

  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);
  }
1142 1143 1144 1145
  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;
1146 1147

    LOG_D(PHY,"RU %d: waking up PRACH thread\n",ru->idx);
1148 1149
    // 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");
1150
  }
1151
  else LOG_W(PHY,"RU prach thread busy, skipping\n");
1152 1153 1154 1155 1156
  pthread_mutex_unlock( &ru->proc.mutex_prach );

  return(0);
}

1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185
#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
1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 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 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
// 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);
  }
  
  
1274 1275 1276 1277 1278
  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
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
  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);
}

1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327
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);
1328
       if (ru->fh_north_asynch_in) print_meas(&ru->rx_fhaul,"rx_fhaul",NULL,NULL);
1329 1330 1331 1332 1333
       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);
       }
1334 1335
     }
  }
1336
  return(NULL);
1337 1338
}

Raymond Knopp's avatar
Raymond Knopp committed
1339 1340 1341 1342
static void* ru_thread( void* param ) {

  static int ru_thread_status;

1343 1344 1345 1346
  RU_t               *ru      = (RU_t*)param;
  RU_proc_t          *proc    = &ru->proc;
  LTE_DL_FRAME_PARMS *fp      = &ru->frame_parms;
  int                ret;
1347 1348
  int                subframe =9;
  int                frame    =1023; 
Raymond Knopp's avatar
Raymond Knopp committed
1349 1350 1351 1352 1353 1354 1355 1356

  // set default return value
  ru_thread_status = 0;


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

1357 1358 1359 1360 1361 1362
  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);
1363 1364 1365 1366
    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");
1367
  }
1368
  if (ru->if_south == LOCAL_RF) { // configure RF parameters only 
1369 1370 1371
        fill_rf_config(ru,ru->rf_config_file);
        init_frame_parms(&ru->frame_parms,1);
        phy_init_RU(ru);
1372
 
1373

1374 1375 1376
        ret = openair0_device_load(&ru->rfdevice,&ru->openair0_cfg);
  }
  if (setup_RU_buffers(ru)!=0) {
1377 1378
        printf("Exiting, cannot initialize RU Buffers\n");
        exit(-1);
1379
  }
1380

1381 1382 1383 1384 1385
  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);
1386
  
Raymond Knopp's avatar
Raymond Knopp committed
1387
  wait_sync("ru_thread");
1388 1389
  

Raymond Knopp's avatar
Raymond Knopp committed
1390 1391


1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402
  // 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
1403
 
1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415
  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
1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428
  // 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++;
    }      

1429 1430 1431 1432
    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
1433
    // synchronization on input FH interface, acquire signals/data and block
1434
    if (ru->fh_south_in) ru->fh_south_in(ru,&frame,&subframe);
Raymond Knopp's avatar
Raymond Knopp committed
1435 1436
    else AssertFatal(1==0, "No fronthaul interface at south port");

1437

1438
    LOG_D(PHY,"RU thread (do_prach %d, is_prach_subframe %d), received frame %d, subframe %d\n",
1439 1440 1441
	  ru->do_prach,
	  is_prach_subframe(fp, proc->frame_rx, proc->subframe_rx),
	  proc->frame_rx,proc->subframe_rx);
1442
 
1443 1444 1445 1446
    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
1447 1448 1449 1450 1451

    // 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
1452
    // do RX front-end processing (frequency-shift, dft) if needed
1453
    if (ru->feprx) ru->feprx(ru);
Raymond Knopp's avatar
Raymond Knopp committed
1454 1455 1456 1457 1458 1459

    // 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);

    // wakeup all eNB processes waiting for this RU
1460 1461
    if (ru->num_eNB>0) wakeup_eNBs(ru);

Raymond Knopp's avatar
Raymond Knopp committed
1462 1463 1464
    // 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");

1465

Raymond Knopp's avatar
Raymond Knopp committed
1466
    // do TX front-end processing if needed (precoding and/or IDFTs)
1467 1468 1469 1470 1471 1472
    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);
1473
 
1474
    if (ru->fh_north_out) ru->fh_north_out(ru);
1475

Raymond Knopp's avatar
Raymond Knopp committed
1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494
  }
  

  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)));
1495
  static int ru_thread_synch_status;
Raymond Knopp's avatar
Raymond Knopp committed
1496 1497 1498 1499 1500 1501 1502


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

  wait_sync("ru_thread_synch");

  // initialize variables for PSS detection
1503
  lte_sync_time_init(&ru->frame_parms);
Raymond Knopp's avatar
Raymond Knopp committed
1504 1505 1506 1507

  while (!oai_exit) {

    // wait to be woken up
1508
    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
1509 1510 1511 1512 1513 1514

    // 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");
      
1515
      sync_pos = lte_sync_time_eNB(ru->common.rxdata,
Raymond Knopp's avatar
Raymond Knopp committed
1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560
				   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();

1561 1562 1563
  ru_thread_synch_status = 0;
  return &ru_thread_synch_status;

Raymond Knopp's avatar
Raymond Knopp committed
1564 1565 1566
}


1567 1568 1569 1570 1571 1572 1573 1574 1575 1576
 
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);
1577
extern void ru_fep_full_2thread(RU_t *ru);
1578
extern void feptx_ofdm(RU_t *ru);
1579
extern void feptx_ofdm_2thread(RU_t *ru);
1580
extern void feptx_prec(RU_t *ru);
1581 1582
extern void init_fep_thread(RU_t *ru,pthread_attr_t *attr);
extern void init_feptx_thread(RU_t *ru,pthread_attr_t *attr);
1583 1584 1585 1586 1587 1588 1589

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;
1590 1591 1592
#ifdef Rel14
  pthread_attr_t *attr_prach_br=NULL;
#endif
1593 1594 1595
  char name[100];

#ifndef OCP_FRAMEWORK
1596
  LOG_I(PHY,"Initializing RU proc %d (%s,%s),\n",ru->idx,eNB_functions[ru->function],eNB_timing[ru->if_timing]);
1597 1598 1599 1600 1601 1602
#endif
  proc = &ru->proc;
  memset((void*)proc,0,sizeof(RU_proc_t));

  proc->ru = ru;
  proc->instance_cnt_prach       = -1;
1603
  proc->instance_cnt_synch       = -1;     ;
1604 1605 1606 1607 1608 1609
  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;
1610 1611
  proc->frame_tx_unwrap          = 0;

1612
  for (i=0;i<10;i++) proc->symbol_mask[i]=0;
Raymond Knopp's avatar
Raymond Knopp committed
1613
  
1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628
  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);
1629 1630 1631 1632 1633 1634 1635

#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  
1636 1637
  
#ifndef DEADLINE_SCHEDULER
1638 1639 1640 1641 1642 1643 1644
  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
1645 1646 1647
#endif
  
  pthread_create( &proc->pthread_FH, attr_FH, ru_thread, (void*)ru );
Raymond Knopp's avatar
Raymond Knopp committed
1648

1649 1650
  if (ru->function == NGFI_RRU_IF4p5) {
    pthread_create( &proc->pthread_prach, attr_prach, ru_thread_prach, (void*)ru );
1651 1652 1653
#ifdef Rel14  
    pthread_create( &proc->pthread_prach_br, attr_prach_br, ru_thread_prach_br, (void*)ru );
#endif
1654 1655 1656 1657 1658
    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) ||
1659
	(ru->function == NGFI_RRU_IF4p5)) pthread_create( &proc->pthread_asynch_rxtx, attr_asynch, ru_thread_asynch_rxtx, (void*)ru );
1660 1661 1662 1663
    
    snprintf( name, sizeof(name), "ru_thread_FH %d", ru->idx );
    pthread_setname_np( proc->pthread_FH, name );
    
Raymond Knopp's avatar
Raymond Knopp committed
1664
  }
1665

1666 1667 1668 1669
  if (get_nprocs()>=2) { 
    if (ru->feprx) init_fep_thread(ru,NULL); 
    if (ru->feptx_ofdm) init_feptx_thread(ru,NULL);
  } 
1670
  if (opp_enabled == 1) pthread_create(&ru->ru_stats_thread,NULL,ru_stats_thread,(void*)ru); 
Raymond Knopp's avatar
Raymond Knopp committed
1671
  
1672 1673
}

1674

1675 1676


Raymond Knopp's avatar
Raymond Knopp committed
1677

1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717
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
1718
  return(-1);
Raymond Knopp's avatar
Raymond Knopp committed
1719 1720 1721
}


1722
char rru_format_options[4][20] = {"OAI_IF5_only","OAI_IF4p5_only","OAI_IF5_and_IF4p5","MBP_IF5"};
1723

1724
char rru_formats[3][20] = {"OAI_IF5","MBP_IF5","OAI_IF4p5"};
1725
char ru_if_formats[4][20] = {"LOCAL_RF","REMOTE_OAI_IF5","REMOTE_MBP_IF5","REMOTE_OAI_IF4p5"};
1726 1727 1728 1729 1730 1731 1732 1733

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;
1734
  int i;
1735 1736 1737 1738 1739

  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]);
1740

Raymond Knopp's avatar
Raymond Knopp committed
1741 1742
  AssertFatal((ret=check_capabilities(ru,capabilities)) == 0,
	      "Cannot configure RRU %d, check_capabilities returned %d\n", idx,ret);
1743 1744 1745 1746
  // 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
1747 1748 1749 1750 1751 1752 1753 1754
  // 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;      
1755 1756
  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
1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767
  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]);
    
1768
#ifdef Rel14
Raymond Knopp's avatar
Raymond Knopp committed
1769 1770 1771 1772
    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];
1773
    }
Raymond Knopp's avatar
Raymond Knopp committed
1774
#endif
1775 1776 1777 1778 1779 1780
  }

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

1781 1782
void configure_rru(int idx,
		   void *arg) {
1783 1784 1785 1786 1787 1788 1789

  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];
1790 1791 1792 1793 1794 1795 1796
  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;
1797 1798 1799 1800 1801 1802 1803
  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) {
1804 1805
    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]);
1806 1807
    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]; 
1808 1809 1810 1811 1812 1813 1814
#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
1815 1816 1817 1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835
  }
  
  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++) {
1836 1837
	int nb_tx=0;
	for (ru_id=0;ru_id<RC.nb_RU;ru_id++) { 
1838
	  ru = RC.ru[ru_id];
1839 1840 1841
	  nb_tx+=ru->nb_tx;
	}
	dlsch->ue_spec_bf_weights[layer] = (int32_t**)malloc16(nb_tx*sizeof(int32_t*));
1842
	  
1843 1844 1845 1846
	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;
1847
	  }
1848
	}	
1849 1850 1851 1852 1853
      }
    }
  }
}

Raymond Knopp's avatar
Raymond Knopp committed
1854 1855 1856
extern void RCconfig_RU(void);

void init_RU(char *rf_config_file) {
Raymond Knopp's avatar
Raymond Knopp committed
1857 1858
  
  int ru_id;
1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869
  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);

1870 1871
  // read in configuration file)
  printf("configuring RU from file\n");
1872
  RCconfig_RU();
1873
  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());
1874

1875
  for (i=0;i<RC.nb_L1_inst;i++) 
1876 1877 1878 1879
    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];
1880
    ru->rf_config_file = rf_config_file;
1881 1882 1883 1884
    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
1885 1886

    
1887
    eNB0             = ru->eNB_list[0];
1888
    if ((ru->function != NGFI_RRU_IF5) && (ru->function != NGFI_RRU_IF4p5))
1889
      AssertFatal(eNB0!=NULL,"eNB0 is null!\n");
1890

1891 1892 1893
    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));
1894 1895 1896 1897 1898 1899

      // 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;
      }
1900
    }
1901
    //    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);
1902 1903 1904

    
    switch (ru->if_south) {
Raymond Knopp's avatar
Raymond Knopp committed
1905
    case LOCAL_RF:   // this is an RU with integrated RF (RRU, eNB)
1906 1907
      if (ru->function ==  NGFI_RRU_IF5) {                 // IF5 RRU
	ru->do_prach              = 0;                      // no prach processing in RU
1908
	ru->fh_north_in           = NULL;                   // no shynchronous incoming fronthaul from north
1909 1910 1911 1912 1913 1914
	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
1915
	ru->start_if              = start_if;               // need to start the if interface for if5
1916 1917 1918
	ru->ifdevice.host_type    = RRU_HOST;
	ru->rfdevice.host_type    = RRU_HOST;
	ru->ifdevice.eth_params   = &ru->eth_params;
1919 1920
    reset_meas(&ru->rx_fhaul);
    reset_meas(&ru->tx_fhaul);
1921 1922
    reset_meas(&ru->compression);
    reset_meas(&ru->transport);
1923 1924 1925 1926 1927 1928 1929

	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
1930
      }
1931 1932 1933 1934 1935 1936
      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
1937 1938
	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)
1939 1940 1941 1942 1943
	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;
1944 1945
    reset_meas(&ru->rx_fhaul);
    reset_meas(&ru->tx_fhaul);
1946 1947
    reset_meas(&ru->compression);
    reset_meas(&ru->transport);
1948 1949 1950 1951 1952 1953 1954 1955

	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
1956
      }
1957 1958
      else if (ru->function == eNodeB_3GPP) {  
	ru->do_prach             = 0;                       // no prach processing in RU            
1959 1960
	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
1961
	ru->feptx_prec           = feptx_prec;              // this is fep with idft and precoding
Raymond Knopp's avatar
Raymond Knopp committed
1962 1963 1964
	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
1965
	ru->rfdevice.host_type   = RAU_HOST;
Raymond Knopp's avatar
Raymond Knopp committed
1966 1967
      }
      ru->fh_south_in            = rx_rf;                               // local synchronous RF RX
1968
      ru->fh_south_out           = tx_rf;                               // local synchronous RF TX
Raymond Knopp's avatar
Raymond Knopp committed
1969
      ru->start_rf               = start_rf;                            // need to start the local RF interface
1970
      printf("configuring ru_id %d (start_rf %p)\n",ru_id,start_rf);
1971
/*
1972 1973 1974 1975 1976
      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
1977

1978 1979 1980
      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
1981
	exit(-1);
1982
      }*/
Raymond Knopp's avatar
Raymond Knopp committed
1983 1984 1985
      break;

    case REMOTE_IF5: // the remote unit is IF5 RRU
1986
      ru->do_prach               = 0;
1987
      ru->feprx                  = (get_nprocs()<=2) ? fep_full : fep_full;                   // this is frequency-shift + DFTs
1988
      ru->feptx_prec             = feptx_prec;                 // need to do transmit Precoding + IDFTs 
1989
      ru->feptx_ofdm             = (get_nprocs()<=2) ? feptx_ofdm : feptx_ofdm_2thread;                 // need to do transmit Precoding + IDFTs 
1990 1991 1992 1993
      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
1994 1995
      }
      else {
1996 1997 1998
	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
1999
      }
2000 2001 2002 2003 2004
      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
2005

2006
      ret = openair0_transport_load(&ru->ifdevice,&ru->openair0_cfg,&ru->eth_params);
Raymond Knopp's avatar
Raymond Knopp committed
2007 2008 2009 2010 2011 2012 2013 2014
      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:
2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030
      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
2031 2032 2033 2034 2035 2036
      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);
      }
      
2037
      malloc_IF4p5_buffer(ru);
Raymond Knopp's avatar
Raymond Knopp committed
2038 2039 2040
      
      break;

2041 2042
    default:
      LOG_E(PHY,"RU with invalid or unknown southbound interface type %d\n",ru->if_south);
Raymond Knopp's avatar
Raymond Knopp committed
2043 2044 2045
      break;
    } // switch on interface type 

2046 2047 2048 2049 2050 2051
    LOG_I(PHY,"Starting ru_thread %d\n",ru_id);

    init_RU_proc(ru);



Raymond Knopp's avatar
Raymond Knopp committed
2052 2053
  } // for ru_id

2054
  //  sleep(1);
2055
  LOG_D(HW,"[lte-softmodem.c] RU threads created\n");
Raymond Knopp's avatar
Raymond Knopp committed
2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067
  

}




void stop_ru(RU_t *ru) {

  printf("Stopping RU %p processing threads\n",(void*)ru);
  
}
2068