lte-enb.c 59.4 KB
Newer Older
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
/*
 * Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The OpenAirInterface Software Alliance licenses this file to You under
 * the OAI Public License, Version 1.0  (the "License"); you may not use this file
 * except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.openairinterface.org/?page_id=698
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *-------------------------------------------------------------------------------
 * For more information about the OpenAirInterface (OAI) Software Alliance:
 *      contact@openairinterface.org
 */
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

/*! \file lte-enb.c
 * \brief Top-level threads for eNodeB
 * \author R. Knopp, F. Kaltenberger, Navid Nikaein
 * \date 2012
 * \version 0.1
 * \company Eurecom
 * \email: knopp@eurecom.fr,florian.kaltenberger@eurecom.fr, navid.nikaein@eurecom.fr
 * \note
 * \warning
 */
#define _GNU_SOURCE
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/mman.h>
#include <sched.h>
#include <linux/sched.h>
#include <signal.h>
#include <execinfo.h>
#include <getopt.h>
#include <sys/sysinfo.h>
#include "rt_wrapper.h"

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

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

#include "PHY/types.h"

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

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

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

63
#include "PHY/LTE_TRANSPORT/if4_tools.h"
64
#include "PHY/LTE_TRANSPORT/if5_tools.h"
65

66
67
68
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
#include "PHY/extern.h"
#include "SCHED/extern.h"
#include "LAYER2/MAC/extern.h"

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

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

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

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

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

Rohit Gupta's avatar
bugfix    
Rohit Gupta committed
104
105
#include "T.h"

106
107
108
109
110
111
112
113
114
115
//#define DEBUG_THREADS 1

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

116
117
// Fix per CC openair rf/if device update
// extern openair0_device openair0;
118
119
120
121
122
123
124
125
126
127
128
129
130

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

extern openair0_config_t openair0_cfg[MAX_CARDS];

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

131
//pthread_t                       main_eNB_thread;
132
133
134

time_stats_t softmodem_stats_mt; // main thread
time_stats_t softmodem_stats_hw; //  hw acquisition
knopp's avatar
knopp committed
135
time_stats_t softmodem_stats_rxtx_sf; // total tx time
136
time_stats_t softmodem_stats_rx_sf; // total rx time
137
138
139
int32_t **rxdata;
int32_t **txdata;

140
141
uint8_t seqno; //sequence number

142
143
144
145
146
147
148
149
150
151
static int                      time_offset[4] = {0,0,0,0};

/* mutex, cond and variable to serialize phy proc TX calls
 * (this mechanism may be relaxed in the future for better
 * performances)
 */
static struct {
  pthread_mutex_t  mutex_phy_proc_tx;
  pthread_cond_t   cond_phy_proc_tx;
  volatile uint8_t phy_proc_CC_id;
152
} sync_phy_proc;
153

154
155
extern double cpuf;

156
157
void exit_fun(const char* s);

knopp's avatar
knopp committed
158
void init_eNB(eNB_func_t node_function[], eNB_timing_t node_timing[],int nb_inst,eth_params_t *,int);
159
void stop_eNB(int nb_inst);
160
161


knopp's avatar
knopp committed
162
static inline void thread_top_init(char *thread_name,
163
				   int affinity,
knopp's avatar
knopp committed
164
165
166
				   uint64_t runtime,
				   uint64_t deadline,
				   uint64_t period) {
knopp's avatar
knopp committed
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186

  MSC_START_USE();

#ifdef DEADLINE_SCHEDULER
  struct sched_attr attr;

  unsigned int flags = 0;

  attr.size = sizeof(attr);
  attr.sched_flags = 0;
  attr.sched_nice = 0;
  attr.sched_priority = 0;

  attr.sched_policy   = SCHED_DEADLINE;
  attr.sched_runtime  = runtime;
  attr.sched_deadline = deadline;
  attr.sched_period   = period; 

  if (sched_setattr(0, &attr, flags) < 0 ) {
    perror("[SCHED] eNB tx thread: sched_setattr failed\n");
laurent's avatar
small2    
laurent committed
187
    exit(1);
knopp's avatar
knopp committed
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
  }

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

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

#ifdef CPU_AFFINITY
  if (get_nprocs() > 2)
  {
205
206
207
208
    if (affinity == 0)
      CPU_SET(0,&cpuset);
    else
      for (j = 1; j < get_nprocs(); j++)
knopp's avatar
knopp committed
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
        CPU_SET(j, &cpuset);
    s = pthread_setaffinity_np(pthread_self(), sizeof(cpu_set_t), &cpuset);
    if (s != 0)
    {
      perror( "pthread_setaffinity_np");
      exit_fun("Error setting processor affinity");
    }
  }
#endif //CPU_AFFINITY

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

  memset(&sparam, 0, sizeof(sparam));
234
  sparam.sched_priority = sched_get_priority_max(SCHED_FIFO);
knopp's avatar
knopp committed
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
  policy = SCHED_FIFO ; 
  
  s = pthread_setschedparam(pthread_self(), policy, &sparam);
  if (s != 0) {
    perror("pthread_setschedparam : ");
    exit_fun("Error setting thread priority");
  }
  
  s = pthread_getschedparam(pthread_self(), &policy, &sparam);
  if (s != 0) {
    perror("pthread_getschedparam : ");
    exit_fun("Error getting thread priority");
  }

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

#endif //LOW_LATENCY

  mlockall(MCL_CURRENT | MCL_FUTURE);

}

knopp's avatar
knopp committed
262
static inline void wait_sync(char *thread_name) {
knopp's avatar
knopp committed
263
264
265
266
267
268
269
270
271
272
273
274
275

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

}

Sandeep Kumar's avatar
Sandeep Kumar committed
276
277
void do_OFDM_mod_rt(int subframe,PHY_VARS_eNB *phy_vars_eNB) {
     
278
279
  unsigned int aa,slot_offset, slot_offset_F;
  int dummy_tx_b[7680*4] __attribute__((aligned(32)));
knopp's avatar
knopp committed
280
  int i,j, tx_offset;
281
282
  int slot_sizeF = (phy_vars_eNB->frame_parms.ofdm_symbol_size)*
                   ((phy_vars_eNB->frame_parms.Ncp==1) ? 6 : 7);
knopp's avatar
knopp committed
283
284
  int len,len2;
  int16_t *txdata;
285
//  int CC_id = phy_vars_eNB->proc.CC_id;
286

287
288
  VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_PHY_ENB_SFGEN , 1 );

289
290
  slot_offset_F = (subframe<<1)*slot_sizeF;

291
  slot_offset = subframe*phy_vars_eNB->frame_parms.samples_per_tti;
292

293
294
  if ((subframe_select(&phy_vars_eNB->frame_parms,subframe)==SF_DL)||
      ((subframe_select(&phy_vars_eNB->frame_parms,subframe)==SF_S))) {
295
296
    //    LOG_D(HW,"Frame %d: Generating slot %d\n",frame,next_slot);

297
298
299
    for (aa=0; aa<phy_vars_eNB->frame_parms.nb_antennas_tx; aa++) {
      if (phy_vars_eNB->frame_parms.Ncp == EXTENDED) {
        PHY_ofdm_mod(&phy_vars_eNB->common_vars.txdataF[0][aa][slot_offset_F],
300
                     dummy_tx_b,
301
                     phy_vars_eNB->frame_parms.ofdm_symbol_size,
302
                     6,
303
                     phy_vars_eNB->frame_parms.nb_prefix_samples,
304
                     CYCLIC_PREFIX);
305
306
307
        PHY_ofdm_mod(&phy_vars_eNB->common_vars.txdataF[0][aa][slot_offset_F+slot_sizeF],
                     dummy_tx_b+(phy_vars_eNB->frame_parms.samples_per_tti>>1),
                     phy_vars_eNB->frame_parms.ofdm_symbol_size,
308
                     6,
309
                     phy_vars_eNB->frame_parms.nb_prefix_samples,
310
311
                     CYCLIC_PREFIX);
      } else {
312
        normal_prefix_mod(&phy_vars_eNB->common_vars.txdataF[0][aa][slot_offset_F],
313
314
                          dummy_tx_b,
                          7,
315
                          &(phy_vars_eNB->frame_parms));
316
	// if S-subframe generate first slot only
Sandeep Kumar's avatar
Sandeep Kumar committed
317
	if (subframe_select(&phy_vars_eNB->frame_parms,subframe) == SF_DL) 
318
319
	  normal_prefix_mod(&phy_vars_eNB->common_vars.txdataF[0][aa][slot_offset_F+slot_sizeF],
			    dummy_tx_b+(phy_vars_eNB->frame_parms.samples_per_tti>>1),
320
			    7,
321
			    &(phy_vars_eNB->frame_parms));
322
323
324
      }

      // if S-subframe generate first slot only
325
326
      if (subframe_select(&phy_vars_eNB->frame_parms,subframe) == SF_S)
	len = phy_vars_eNB->frame_parms.samples_per_tti>>1;
327
      else
328
	len = phy_vars_eNB->frame_parms.samples_per_tti;
329
330
331
332
333
334
335
      /*
      for (i=0;i<len;i+=4) {
	dummy_tx_b[i] = 0x100;
	dummy_tx_b[i+1] = 0x01000000;
	dummy_tx_b[i+2] = 0xff00;
	dummy_tx_b[i+3] = 0xff000000;
	}*/
knopp's avatar
knopp committed
336
337
338
339
340
341
342
343
344
345
346
347
348
349
      
      if (slot_offset+time_offset[aa]<0) {
	txdata = (int16_t*)&phy_vars_eNB->common_vars.txdata[0][aa][(LTE_NUMBER_OF_SUBFRAMES_PER_FRAME*phy_vars_eNB->frame_parms.samples_per_tti)+tx_offset];
        len2 = -(slot_offset+time_offset[aa]);
	len2 = (len2>len) ? len : len2;
	for (i=0; i<(len2<<1); i++) {
	  txdata[i] = ((int16_t*)dummy_tx_b)[i]<<openair0_cfg[0].iq_txshift;
	}
	if (len2<len) {
	  txdata = (int16_t*)&phy_vars_eNB->common_vars.txdata[0][aa][0];
	  for (j=0; i<(len<<1); i++,j++) {
	    txdata[j++] = ((int16_t*)dummy_tx_b)[i]<<openair0_cfg[0].iq_txshift;
	  }
	}
Sandeep Kumar's avatar
Sandeep Kumar committed
350
      }  
knopp's avatar
knopp committed
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
      else if ((slot_offset+time_offset[aa]+len)>(LTE_NUMBER_OF_SUBFRAMES_PER_FRAME*phy_vars_eNB->frame_parms.samples_per_tti)) {
	tx_offset = (int)slot_offset+time_offset[aa];
	txdata = (int16_t*)&phy_vars_eNB->common_vars.txdata[0][aa][tx_offset];
	len2 = -tx_offset+LTE_NUMBER_OF_SUBFRAMES_PER_FRAME*phy_vars_eNB->frame_parms.samples_per_tti;
	for (i=0; i<(len2<<1); i++) {
	  txdata[i] = ((int16_t*)dummy_tx_b)[i]<<openair0_cfg[0].iq_txshift;
	}
	txdata = (int16_t*)&phy_vars_eNB->common_vars.txdata[0][aa][0];
	for (j=0; i<(len<<1); i++,j++) {
	  txdata[j++] = ((int16_t*)dummy_tx_b)[i]<<openair0_cfg[0].iq_txshift;
	}
      }
      else {
	tx_offset = (int)slot_offset+time_offset[aa];
	txdata = (int16_t*)&phy_vars_eNB->common_vars.txdata[0][aa][tx_offset];
366

knopp's avatar
knopp committed
367
368
369
370
371
	for (i=0; i<(len<<1); i++) {
	  txdata[i] = ((int16_t*)dummy_tx_b)[i]<<openair0_cfg[0].iq_txshift;
	}
      }
      
372
     // if S-subframe switch to RX in second subframe
knopp's avatar
knopp committed
373
      /*
374
     if (subframe_select(&phy_vars_eNB->frame_parms,subframe) == SF_S) {
375
       for (i=0; i<len; i++) {
376
	 phy_vars_eNB->common_vars.txdata[0][aa][tx_offset++] = 0x00010001;
377
378
       }
     }
knopp's avatar
knopp committed
379
      */
380
     if ((((phy_vars_eNB->frame_parms.tdd_config==0) ||
Sandeep Kumar's avatar
Sandeep Kumar committed
381
382
383
384
	   (phy_vars_eNB->frame_parms.tdd_config==1) ||
	   (phy_vars_eNB->frame_parms.tdd_config==2) ||
	   (phy_vars_eNB->frame_parms.tdd_config==6)) && 
	   (subframe==0)) || (subframe==5)) {
385
386
387
       // turn on tx switch N_TA_offset before
       //LOG_D(HW,"subframe %d, time to switch to tx (N_TA_offset %d, slot_offset %d) \n",subframe,phy_vars_eNB->N_TA_offset,slot_offset);
       for (i=0; i<phy_vars_eNB->N_TA_offset; i++) {
Sandeep Kumar's avatar
Sandeep Kumar committed
388
389
390
         tx_offset = (int)slot_offset+time_offset[aa]+i-phy_vars_eNB->N_TA_offset/2;
         if (tx_offset<0)
           tx_offset += LTE_NUMBER_OF_SUBFRAMES_PER_FRAME*phy_vars_eNB->frame_parms.samples_per_tti;
391
	 
Sandeep Kumar's avatar
Sandeep Kumar committed
392
393
         if (tx_offset>=(LTE_NUMBER_OF_SUBFRAMES_PER_FRAME*phy_vars_eNB->frame_parms.samples_per_tti))
           tx_offset -= LTE_NUMBER_OF_SUBFRAMES_PER_FRAME*phy_vars_eNB->frame_parms.samples_per_tti;
394
	 
Sandeep Kumar's avatar
Sandeep Kumar committed
395
         phy_vars_eNB->common_vars.txdata[0][aa][tx_offset] = 0x00000000;
396
397
398
399
       }
     }
    }
  }
400
401
402
403
  VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_PHY_ENB_SFGEN , 0 );
}

void tx_fh_if5(PHY_VARS_eNB *eNB,eNB_rxtx_proc_t *proc) {
Raymond Knopp's avatar
Raymond Knopp committed
404
  VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME( VCD_SIGNAL_DUMPER_VARIABLES_TRX_TST, proc->timestamp_tx&0xffffffff );
405
406
407
  send_IF5(eNB, proc->timestamp_tx, proc->subframe_tx, &seqno, IF5_RRH_GW_DL);
}

408
409
410
411
412
void tx_fh_if5_mobipass(PHY_VARS_eNB *eNB,eNB_rxtx_proc_t *proc) {
  VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME( VCD_SIGNAL_DUMPER_VARIABLES_TRX_TST, proc->timestamp_tx&0xffffffff );
  send_IF5(eNB, proc->timestamp_tx, proc->subframe_tx, &seqno, IF5_MOBIPASS); 
}

413
414
415
416
void tx_fh_if4p5(PHY_VARS_eNB *eNB,eNB_rxtx_proc_t *proc) {    
  send_IF4p5(eNB,proc->frame_tx, proc->subframe_tx, IF4p5_PDLFFT, 0);
}

Raymond Knopp's avatar
Raymond Knopp committed
417
418
419
420
void proc_tx_high0(PHY_VARS_eNB *eNB,
		   eNB_rxtx_proc_t *proc,
		   relaying_type_t r_type,
		   PHY_VARS_RN *rn) {
421

knopp's avatar
knopp committed
422
423
424
  int offset = proc == &eNB->proc.proc_rxtx[0] ? 0 : 1;

  VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME( VCD_SIGNAL_DUMPER_VARIABLES_FRAME_NUMBER_TX0_ENB+offset, proc->frame_tx );
425
  VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME( VCD_SIGNAL_DUMPER_VARIABLES_SUBFRAME_NUMBER_TX0_ENB+offset, proc->subframe_tx );
knopp's avatar
knopp committed
426

427
  phy_procedures_eNB_TX(eNB,proc,r_type,rn,1);
428
429
430
431
432
433
434
435
436
437
438
439
440
441

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

Raymond Knopp's avatar
Raymond Knopp committed
442
443
444
445
446
447
}

void proc_tx_high(PHY_VARS_eNB *eNB,
		  eNB_rxtx_proc_t *proc,
		  relaying_type_t r_type,
		  PHY_VARS_RN *rn) {
448

knopp's avatar
knopp committed
449

Raymond Knopp's avatar
Raymond Knopp committed
450
451
452
453
454
455
456
457
458
459
460
461
  // do PHY high
  proc_tx_high0(eNB,proc,r_type,rn);

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

}

void proc_tx_full(PHY_VARS_eNB *eNB,
		  eNB_rxtx_proc_t *proc,
		  relaying_type_t r_type,
		  PHY_VARS_RN *rn) {
462

Raymond Knopp's avatar
Raymond Knopp committed
463
464
465
466
467
468

  // do PHY high
  proc_tx_high0(eNB,proc,r_type,rn);
  // do OFDM modulation
  do_OFDM_mod_rt(proc->subframe_tx,eNB);
  // if TX fronthaul go ahead 
469
470
471
472
473
474
  if (eNB->tx_fh) eNB->tx_fh(eNB,proc);



}

Raymond Knopp's avatar
Raymond Knopp committed
475
476
477
478
void proc_tx_rru_if4p5(PHY_VARS_eNB *eNB,
		       eNB_rxtx_proc_t *proc,
		       relaying_type_t r_type,
		       PHY_VARS_RN *rn) {
479
480
481
482
483

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

knopp's avatar
knopp committed
484
485
486
  int offset = proc == &eNB->proc.proc_rxtx[0] ? 0 : 1;

  VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME( VCD_SIGNAL_DUMPER_VARIABLES_FRAME_NUMBER_TX0_ENB+offset, proc->frame_tx );
487
  VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME( VCD_SIGNAL_DUMPER_VARIABLES_SUBFRAME_NUMBER_TX0_ENB+offset, proc->subframe_tx );
knopp's avatar
knopp committed
488

489
490
491
492
493
  /// **** recv_IF4 of txdataF from RCC **** ///             
  symbol_number = 0;
  symbol_mask = 0;
  symbol_mask_full = (1<<eNB->frame_parms.symbols_per_tti)-1;
  
knopp's avatar
knopp committed
494

495
496
497
498
499
500
501
502
503
  do { 
    recv_IF4p5(eNB, &proc->frame_tx, &proc->subframe_tx, &packet_type, &symbol_number);
    symbol_mask = symbol_mask | (1<<symbol_number);
  } while (symbol_mask != symbol_mask_full); 

  do_OFDM_mod_rt(proc->subframe_tx, eNB);
}

void proc_tx_rru_if5(PHY_VARS_eNB *eNB,eNB_rxtx_proc_t *proc) {
knopp's avatar
knopp committed
504
505
506
  int offset = proc == &eNB->proc.proc_rxtx[0] ? 0 : 1;

  VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME( VCD_SIGNAL_DUMPER_VARIABLES_FRAME_NUMBER_TX0_ENB+offset, proc->frame_tx );
507
  VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME( VCD_SIGNAL_DUMPER_VARIABLES_SUBFRAME_NUMBER_TX0_ENB+offset, proc->subframe_tx );
508
509
  /// **** recv_IF5 of txdata from BBU **** ///       
  recv_IF5(eNB, &proc->timestamp_tx, proc->subframe_tx, IF5_RRH_GW_DL);
510
511
}

512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
int wait_CCs(eNB_rxtx_proc_t *proc) {

  struct timespec wait;

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

  if (pthread_mutex_timedlock(&sync_phy_proc.mutex_phy_proc_tx,&wait) != 0) {
    LOG_E(PHY, "[SCHED][eNB] error locking PHY proc mutex for eNB TX\n");
    exit_fun("nothing to add");
    return(-1);
  }
  
  // wait for our turn or oai_exit
  while (sync_phy_proc.phy_proc_CC_id != proc->CC_id && !oai_exit) {
    pthread_cond_wait(&sync_phy_proc.cond_phy_proc_tx,
		      &sync_phy_proc.mutex_phy_proc_tx);
  }
  
  if (pthread_mutex_unlock(&sync_phy_proc.mutex_phy_proc_tx) != 0) {
    LOG_E(PHY, "[SCHED][eNB] error unlocking PHY proc mutex for eNB TX\n");
    exit_fun("nothing to add");
    return(-1);
  }
  return(0);
}
Sandeep Kumar's avatar
Sandeep Kumar committed
538

knopp's avatar
knopp committed
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
static inline int rxtx(PHY_VARS_eNB *eNB,eNB_rxtx_proc_t *proc, char *thread_name) {

  start_meas(&softmodem_stats_rxtx_sf);
  // ****************************************
  // Common RX procedures subframe n
  phy_procedures_eNB_common_RX(eNB);
  
  // UE-specific RX processing for subframe n
  if (eNB->proc_uespec_rx) eNB->proc_uespec_rx(eNB, proc, no_relay );
  
  // *****************************************
  // TX processing for subframe n+4
  // run PHY TX procedures the one after the other for all CCs to avoid race conditions
  // (may be relaxed in the future for performance reasons)
  // *****************************************
554
  //if (wait_CCs(proc)<0) return(-1);
knopp's avatar
knopp committed
555
556
557
558
559
560
561
562
563
564
565
566
  
  if (oai_exit) return(-1);
  
  if (eNB->proc_tx)	eNB->proc_tx(eNB, proc, no_relay, NULL );
  
  if (release_thread(&proc->mutex_rxtx,&proc->instance_cnt_rxtx,thread_name)<0) return(-1);

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

567
/*!
knopp's avatar
knopp committed
568
 * \brief The RX UE-specific and TX thread of eNB.
569
570
571
 * \param param is a \ref eNB_proc_t structure which contains the info what to process.
 * \returns a pointer to an int. The storage is not on the heap and must not be freed.
 */
Sandeep Kumar's avatar
Sandeep Kumar committed
572
573
static void* eNB_thread_rxtx( void* param ) {

knopp's avatar
knopp committed
574
  static int eNB_thread_rxtx_status;
575

knopp's avatar
knopp committed
576
  eNB_rxtx_proc_t *proc = (eNB_rxtx_proc_t*)param;
577
578
  PHY_VARS_eNB *eNB = PHY_vars_eNB_g[0][proc->CC_id];

knopp's avatar
knopp committed
579
580
  char thread_name[100];

581

582
  // set default return value
knopp's avatar
knopp committed
583
  eNB_thread_rxtx_status = 0;
584
585


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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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


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

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

} 


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

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

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

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

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

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

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

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

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

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

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

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

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


790

knopp's avatar
knopp committed
791
  int subframe=0, frame=0; 
792

793
  thread_top_init("thread_asynch",1,870000L,1000000L,1000000L);
794
795
796

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

knopp's avatar
knopp committed
797
  wait_sync("thread_asynch");
798
799
800
801

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

knopp's avatar
knopp committed
802
  wait_on_condition(&proc->mutex_asynch_rxtx,&proc->cond_asynch_rxtx,&proc->instance_cnt_asynch_rxtx,"thread_asynch");
803
804
805
806

  printf( "devices ok (eNB_thread_asynch_rx)\n");


knopp's avatar
knopp committed
807
808
809
  while (!oai_exit) { 
   
    if (oai_exit) break;   
810

knopp's avatar
knopp committed
811
812
813
814
815
816
817
    if (subframe==9) { 
      subframe=0;
      frame++;
      frame&=1023;
    } else {
      subframe++;
    }      
818

knopp's avatar
knopp committed
819
820
821
    if (eNB->fh_asynch) eNB->fh_asynch(eNB,&frame,&subframe);
    else AssertFatal(1==0, "Unknown eNB->node_function %d",eNB->node_function);
    
822
  }
knopp's avatar
knopp committed
823

824
825
  eNB_thread_asynch_rxtx_status=0;
  return(&eNB_thread_asynch_rxtx_status);
826
}
Sandeep Kumar's avatar
Sandeep Kumar committed
827

828

knopp's avatar
knopp committed
829
830
831
832
833
834



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

  eNB_proc_t *proc = &eNB->proc;
835
836
837
838
  LTE_DL_FRAME_PARMS *fp = &eNB->frame_parms;
  void *rxp[fp->nb_antennas_rx],*txp[fp->nb_antennas_tx]; 
  unsigned int rxs,txs;
  int i;
839
  int tx_sfoffset = 3;//(eNB->single_thread_flag == 1) ? 3 : 3;
840
841
  if (proc->first_rx==0) {
    
842
    // Transmit TX buffer based on timestamp from RX
843
    //    printf("trx_write -> USRP TS %llu (sf %d)\n", (proc->timestamp_rx+(3*fp->samples_per_tti)),(proc->subframe_rx+2)%10);
844
    VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME( VCD_SIGNAL_DUMPER_VARIABLES_TRX_TST, (proc->timestamp_rx+(tx_sfoffset*fp->samples_per_tti)-openair0_cfg[0].tx_sample_advance)&0xffffffff );
845
846
847
848
    VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME( VCD_SIGNAL_DUMPER_FUNCTIONS_TRX_WRITE, 1 );
    // prepare tx buffer pointers
	
    for (i=0; i<fp->nb_antennas_tx; i++)
849
      txp[i] = (void*)&eNB->common_vars.txdata[0][i][((proc->subframe_rx+tx_sfoffset)%10)*fp->samples_per_tti];
850
851
    
    txs = eNB->rfdevice.trx_write_func(&eNB->rfdevice,
852
				       proc->timestamp_rx+(tx_sfoffset*fp->samples_per_tti)-openair0_cfg[0].tx_sample_advance,
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
				       txp,
				       fp->samples_per_tti,
				       fp->nb_antennas_tx,
				       1);
    
    VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME( VCD_SIGNAL_DUMPER_FUNCTIONS_TRX_WRITE, 0 );
    
    
    
    if (txs !=  fp->samples_per_tti) {
      LOG_E(PHY,"TX : Timeout (sent %d/%d)\n",txs, fp->samples_per_tti);
      exit_fun( "problem transmitting samples" );
    }	
  }
  
  for (i=0; i<fp->nb_antennas_rx; i++)
    rxp[i] = (void*)&eNB->common_vars.rxdata[0][i][*subframe*fp->samples_per_tti];
  
  VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME( VCD_SIGNAL_DUMPER_FUNCTIONS_TRX_READ, 1 );
872

873
874
875
876
877
  rxs = eNB->rfdevice.trx_read_func(&eNB->rfdevice,
				    &(proc->timestamp_rx),
				    rxp,
				    fp->samples_per_tti,
				    fp->nb_antennas_rx);
Raymond Knopp's avatar
Raymond Knopp committed
878
879

  VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME( VCD_SIGNAL_DUMPER_FUNCTIONS_TRX_READ, 0 );
880
881
882
  
  proc->frame_rx    = (proc->timestamp_rx / (fp->samples_per_tti*10))&1023;
  proc->subframe_rx = (proc->timestamp_rx / fp->samples_per_tti)%10;
883
  proc->timestamp_tx = proc->timestamp_rx+(4*fp->samples_per_tti);
884
  //  printf("trx_read <- USRP TS %llu (sf %d, first_rx %d)\n", proc->timestamp_rx,proc->subframe_rx,proc->first_rx);  
885
886
887
  
  if (proc->first_rx == 0) {
    if (proc->subframe_rx != *subframe){
knopp's avatar
knopp committed
888
      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);
889
890
891
892
      exit_fun("Exiting");
    }
    
    if (proc->frame_rx != *frame) {
knopp's avatar
knopp committed
893
      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);
894
895
896
897
898
899
900
901
902
903
904
905
      exit_fun("Exiting");
    }
  } else {
    proc->first_rx = 0;
    *frame = proc->frame_rx;
    *subframe = proc->subframe_rx;        
  }
  
  //printf("timestamp_rx %lu, frame %d(%d), subframe %d(%d)\n",proc->timestamp_rx,proc->frame_rx,frame,proc->subframe_rx,subframe);
  
  VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME( VCD_SIGNAL_DUMPER_VARIABLES_TRX_TS, proc->timestamp_rx&0xffffffff );
  
Raymond Knopp's avatar
Raymond Knopp committed
906
907
908
909
910
  if (rxs != fp->samples_per_tti)
    exit_fun( "problem receiving samples" );
  

  
911
912
}

knopp's avatar
knopp committed
913
void rx_fh_if5(PHY_VARS_eNB *eNB,int *frame, int *subframe) {
914
915

  LTE_DL_FRAME_PARMS *fp = &eNB->frame_parms;
knopp's avatar
knopp committed
916
  eNB_proc_t *proc = &eNB->proc;
917
918
919
920
921
922
923

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

  proc->frame_rx    = (proc->timestamp_rx / (fp->samples_per_tti*10))&1023;
  proc->subframe_rx = (proc->timestamp_rx / fp->samples_per_tti)%10;
  
  if (proc->first_rx == 0) {
Raymond Knopp's avatar
Raymond Knopp committed
924
    if (proc->subframe_rx != *subframe){
925
926
927
928
      LOG_E(PHY,"Received Timestamp doesn't correspond to the time we think it is (proc->subframe_rx %d, subframe %d)\n",proc->subframe_rx,subframe);
      exit_fun("Exiting");
    }
    
Raymond Knopp's avatar
Raymond Knopp committed
929
    if (proc->frame_rx != *frame) {
930
931
932
933
934
      LOG_E(PHY,"Received Timestamp doesn't correspond to the time we think it is (proc->frame_rx %d frame %d)\n",proc->frame_rx,frame);
      exit_fun("Exiting");
    }
  } else {
    proc->first_rx = 0;
Raymond Knopp's avatar
Raymond Knopp committed
935
936
    *frame = proc->frame_rx;
    *subframe = proc->subframe_rx;        
937
938
939
940
941
942
  }      
  
  VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME( VCD_SIGNAL_DUMPER_VARIABLES_TRX_TS, proc->timestamp_rx&0xffffffff );

}

knopp's avatar
knopp committed
943

944
void rx_fh_if4p5(PHY_VARS_eNB *eNB,int *frame,int *subframe) {
945
946

  LTE_DL_FRAME_PARMS *fp = &eNB->frame_parms;
947
  eNB_proc_t *proc = &eNB->proc;
948
949
950
951
952
953
954
955
956
957

  int prach_rx;

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

  symbol_mask = 0;
  symbol_mask_full = (1<<fp->symbols_per_tti)-1;
  prach_rx = 0;
Raymond Knopp's avatar
Raymond Knopp committed
958

959
960
  do {   // Blocking, we need a timeout on this !!!!!!!!!!!!!!!!!!!!!!!
    recv_IF4p5(eNB, &proc->frame_rx, &proc->subframe_rx, &packet_type, &symbol_number);
961

962
963
964
965
966
967
    if (packet_type == IF4p5_PULFFT) {
      symbol_mask = symbol_mask | (1<<symbol_number);
      prach_rx = (is_prach_subframe(fp, proc->frame_rx, proc->subframe_rx)>0) ? 1 : 0;                            
    } else if (packet_type == IF4p5_PRACH) {
      prach_rx = 0;
    }
Raymond Knopp's avatar
Raymond Knopp committed
968

969
  } while( (symbol_mask != symbol_mask_full) || (prach_rx == 1));    
970
971
972
973
974
975

  //caculate timestamp_rx, timestamp_tx based on frame and subframe
   proc->timestamp_rx = ((proc->frame_rx * 10)  + proc->subframe_rx ) * fp->samples_per_tti ;
   proc->timestamp_tx = proc->timestamp_rx +  (4*fp->samples_per_tti);
 
 
976
977
  if (proc->first_rx == 0) {
    if (proc->subframe_rx != *subframe){
Raymond Knopp's avatar
Raymond Knopp committed
978
      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);
979
980
981
      exit_fun("Exiting");
    }
    if (proc->frame_rx != *frame) {
Raymond Knopp's avatar
Raymond Knopp committed
982
      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);
983
984
985
986
987
988
989
990
991
992
993
994
      exit_fun("Exiting");
    }
  } else {
    proc->first_rx = 0;
    *frame = proc->frame_rx;
    *subframe = proc->subframe_rx;        
  }
  
  VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME( VCD_SIGNAL_DUMPER_VARIABLES_TRX_TS, proc->timestamp_rx&0xffffffff );
  
}

knopp's avatar
knopp committed
995
996
void rx_fh_slave(PHY_VARS_eNB *eNB,int *frame,int *subframe) {
  // This case is for synchronization to another thread
997
  // it just waits for an external event.  The actual rx_fh is handle by the asynchronous RX thread
knopp's avatar
knopp committed
998
999
  eNB_proc_t *proc=&eNB->proc;

knopp's avatar
knopp committed
1000
1001
1002
1003
1004
  if (wait_on_condition(&proc->mutex_FH,&proc->cond_FH,&proc->instance_cnt_FH,"rx_fh_slave") < 0)
    return;

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

knopp's avatar
knopp committed
1005
1006
1007
1008
  
}


1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
int wakeup_rxtx(eNB_proc_t *proc,eNB_rxtx_proc_t *proc_rxtx,LTE_DL_FRAME_PARMS *fp) {

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

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

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

  return(0);
}

void wakeup_slaves(eNB_proc_t *proc) {

  int i;
  struct timespec wait;
  
  wait.tv_sec=0;
  wait.tv_nsec=5000000L;
  
  for (i=0;i<proc->num_slaves;i++) {
    eNB_proc_t *slave_proc = proc->slave_proc[i];
    // wake up slave FH thread
    // lock the FH mutex and make sure the thread is ready
    if (pthread_mutex_timedlock(&slave_proc->mutex_FH,&wait) != 0) {
      LOG_E( PHY, "[eNB] ERROR pthread_mutex_lock for eNB CCid %d slave CCid %d (IC %d)\n",proc->CC_id,slave_proc->CC_id);
      exit_fun( "error locking mutex_rxtx" );
      break;
    }
    
    int cnt_slave            = ++slave_proc->instance_cnt_FH;
    slave_proc->frame_rx     = proc->frame_rx;
    slave_proc->subframe_rx  = proc->subframe_rx;
    slave_proc->timestamp_rx = proc->timestamp_rx;
1083
1084
    slave_proc->timestamp_tx = proc->timestamp_tx; 

1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
    pthread_mutex_unlock( &slave_proc->mutex_FH );
    
    if (cnt_slave == 0) {
      // the thread was presumably waiting where it should and can now be woken up
      if (pthread_cond_signal(&slave_proc->cond_FH) != 0) {
	LOG_E( PHY, "[eNB] ERROR pthread_cond_signal for eNB CCid %d, slave CCid %d\n",proc->CC_id,slave_proc->CC_id);
          exit_fun( "ERROR pthread_cond_signal" );
	  break;
      }
    } else {
1095
      LOG_W( PHY,"[eNB] Frame %d, slave CC_id %d thread busy!! (cnt_FH %i)\n",slave_proc->frame_rx,slave_proc->CC_id, cnt_slave);
1096
1097
1098
1099
1100
1101
      exit_fun( "FH thread busy" );
      break;
    }             
  }
}

1102
/*!
1103
1104
1105
 * \brief The Fronthaul thread of RRU/RAU/RCC/eNB
 * In the case of RRU/eNB, handles interface with external RF
 * In the case of RAU/RCC, handles fronthaul interface with RRU/RAU
1106
1107
1108
 * \param param is a \ref eNB_proc_t structure which contains the info what to process.
 * \returns a pointer to an int. The storage is not on the heap and must not be freed.
 */
knopp's avatar
knopp committed
1109

1110
static void* eNB_thread_FH( void* param ) {
Sandeep Kumar's avatar
Sandeep Kumar committed
1111
  
1112
  static int eNB_thread_FH_status;
1113
1114

  eNB_proc_t *proc = (eNB_proc_t*)param;
1115
1116
  PHY_VARS_eNB *eNB = PHY_vars_eNB_g[0][proc->CC_id];
  LTE_DL_FRAME_PARMS *fp = &eNB->frame_parms;
1117

Sandeep Kumar's avatar
Sandeep Kumar committed
1118
  int subframe=0, frame=0; 
1119

1120
  // set default return value
1121
  eNB_thread_FH_status = 0;
1122

1123
  thread_top_init("eNB_thread_FH",0,870000,1000000,1000000);
1124

knopp's avatar
knopp committed
1125
  wait_sync("eNB_thread_FH");
1126

1127
#if defined(ENABLE_ITTI) && defined(ENABLE_USE_MME)
knopp's avatar
knopp committed
1128
1129
  if (eNB->node_function < NGFI_RRU_IF5)
    wait_system_ready ("Waiting for eNB application to be ready %s\r", &start_eNB);
1130
#endif 
1131

1132
1133
1134
  // Start IF device if any
  if (eNB->start_if) 
    if (eNB->start_if(eNB) != 0)
1135
      LOG_E(HW,"Could not start the IF device\n");
1136

knopp's avatar
knopp committed
1137
1138
1139
1140
1141
  // Start RF device if any
  if (eNB->start_rf)
    if (eNB->start_rf(eNB) != 0)
      LOG_E(HW,"Could not start the RF device\n");

knopp's avatar
knopp committed
1142
  // wakeup asnych_rxtx thread because the devices are ready at this point
1143
1144
1145
1146
1147
  pthread_mutex_lock(&proc->mutex_asynch_rxtx);
  proc->instance_cnt_asynch_rxtx=0;
  pthread_mutex_unlock(&proc->mutex_asynch_rxtx);
  pthread_cond_signal(&proc->cond_asynch_rxtx);

Sandeep Kumar's avatar
Sandeep Kumar committed
1148
1149
  // This is a forever while loop, it loops over subframes which are scheduled by incoming samples from HW devices
  while (!oai_exit) {
Raymond Knopp's avatar
Raymond Knopp committed
1150

knopp's avatar
knopp committed
1151
1152
    // 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.
1153
1154
1155
1156
1157
1158
1159
1160
    if (subframe==9) { 
      subframe=0;
      frame++;
      frame&=1023;
    } else {
      subframe++;
    }      

knopp's avatar
knopp committed
1161
1162
1163
1164
 
    // synchronization on FH interface, acquire signals/data and block
    if (eNB->rx_fh) eNB->rx_fh(eNB,&frame,&subframe);
    else AssertFatal(1==0, "No fronthaul interface : eNB->node_function %d",eNB->node_function);
1165

Cedric Roux's avatar
Cedric Roux committed
1166
1167
    T(T_ENB_MASTER_TICK, T_INT(0), T_INT(proc->frame_rx), T_INT(proc->subframe_rx));

1168
1169
    // At this point, all information for subframe has been received on FH interface
    // If this proc is to provide synchronization, do so
1170
    wakeup_slaves(proc);
1171
1172
      
    // wake up RXn_TXnp4 thread for the subframe
Sandeep Kumar's avatar
Sandeep Kumar committed
1173
    // choose even or odd thread for RXn-TXnp4 processing 
1174
    if (wakeup_rxtx(proc,&proc->proc_rxtx[proc->subframe_rx&1],fp) < 0)
1175
      break;
knopp's avatar
knopp committed
1176

knopp's avatar
knopp committed
1177
    // artifical sleep for very slow fronthaul
1178
1179
    if (eNB->frame_parms.N_RB_DL==6)
      rt_sleep_ns(800000LL);
1180
1181
1182
  }
    
  printf( "Exiting FH thread \n");
knopp's avatar
knopp committed
1183
 
1184
1185
  eNB_thread_FH_status = 0;
  return &eNB_thread_FH_status;
1186
1187
1188
1189
1190
1191
1192
1193
}


/*!
 * \brief The prach receive thread of eNB.
 * \param param is a \ref eNB_proc_t structure which contains the info what to process.
 * \returns a pointer to an int. The storage is not on the heap and must not be freed.
 */
Sandeep Kumar's avatar
Sandeep Kumar committed
1194
static void* eNB_thread_prach( void* param ) {
1195
1196
1197
1198
  static int eNB_thread_prach_status;

  eNB_proc_t *proc = (eNB_proc_t*)param;
  PHY_VARS_eNB *eNB= PHY_vars_eNB_g[0][proc->CC_id];
Raymond Knopp's avatar
Raymond Knopp committed
1199

1200
1201
1202
  // set default return value
  eNB_thread_prach_status = 0;

1203
  thread_top_init("eNB_thread_prach",1,500000L,1000000L,20000000L);
1204

Sandeep Kumar's avatar
Sandeep Kumar committed
1205
1206
1207
  while (!oai_exit) {
    
    if (oai_exit) break;
1208

knopp's avatar
knopp committed
1209
    if (wait_on_condition(&proc->mutex_prach,&proc->cond_prach,&proc->instance_cnt_prach,"eNB_prach_thread") < 0) break;
knopp's avatar
knopp committed
1210
    
1211
    prach_procedures(eNB);
1212
    
knopp's avatar
knopp committed
1213
    if (release_thread(&proc->mutex_prach,&proc->instance_cnt_prach,"eNB_prach_thread") < 0) break;
1214
1215
1216
1217
1218
1219
  }

  printf( "Exiting eNB thread PRACH\n");

  eNB_thread_prach_status = 0;
  return &eNB_thread_prach_status;
1220
}
1221

knopp's avatar
knopp committed
1222
static void* eNB_thread_single( void* param ) {
1223

knopp's avatar
knopp committed
1224
  static int eNB_thread_single_status;
1225

knopp's avatar
knopp committed
1226
1227
1228
  eNB_proc_t *proc = (eNB_proc_t*)param;
  eNB_rxtx_proc_t *proc_rxtx = &proc->proc_rxtx[0];
  PHY_VARS_eNB *eNB = PHY_vars_eNB_g[0][proc->CC_id];
1229

knopp's avatar
knopp committed
1230
  int subframe=0, frame=0; 
1231

knopp's avatar
knopp committed
1232
1233
  // set default return value
  eNB_thread_single_status = 0;
1234

1235
  thread_top_init("eNB_thread_single",0,870000,1000000,1000000);
1236

knopp's avatar
knopp committed
1237
  wait_sync("eNB_thread_single");
1238

1239
#if defined(ENABLE_ITTI) && defined(ENABLE_USE_MME)
knopp's avatar
knopp committed
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
  if (eNB->node_function < NGFI_RRU_IF5)
    wait_system_ready ("Waiting for eNB application to be ready %s\r", &start_eNB);
#endif 

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

  // Start RF device if any
  if (eNB->start_rf)
    if (eNB->start_rf(eNB) != 0)
      LOG_E(HW,"Could not start the RF device\n");

  // wakeup asnych_rxtx thread because the devices are ready at this point
  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);
1259

knopp's avatar
knopp committed
1260
  // This is a forever while loop, it loops over subframes which are scheduled by incoming samples from HW devices
Sandeep Kumar's avatar
Sandeep Kumar committed
1261
1262
  while (!oai_exit) {

knopp's avatar
knopp committed
1263
1264
1265
1266
1267
1268
1269
1270
1271
    // 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++;
    }      
Sandeep Kumar's avatar
Sandeep Kumar committed
1272

1273
    LOG_D(PHY,"eNB Fronthaul thread, frame %d, subframe %d\n",frame,subframe);
knopp's avatar
knopp committed
1274
1275
1276
1277
1278
1279
1280
 
    // synchronization on FH interface, acquire signals/data and block
    if (eNB->rx_fh) eNB->rx_fh(eNB,&frame,&subframe);
    else AssertFatal(1==0, "No fronthaul interface : eNB->node_function %d",eNB->node_function);

    T(T_ENB_MASTER_TICK, T_INT(0), T_INT(proc->frame_rx), T_INT(proc->subframe_rx));

1281
1282
1283
1284
1285
    proc_rxtx->subframe_rx = proc->subframe_rx;
    proc_rxtx->frame_rx    = proc->frame_rx;
    proc_rxtx->subframe_tx = (proc->subframe_rx+4)%10;
    proc_rxtx->frame_tx    = (proc->subframe_rx < 6) ? proc->frame_rx :