Don't allocate gNB rxdataF, it is managed at the RU

Removes phy_procedures_gNB_common_RX() (only used in nr_ulsim) + fixes
in pucchsim

doc/SW_archi.md

@@ -101,7 +101,6 @@ raw incoming data is in buffer called "rxdata"
 ## nr_fep_full()
 "front end processing" of uplink signal  
 performs DFT on the signal  
-same function (duplicates): phy_procedures_gNB_common_RX()  
 it computes the buffer rxdataF (for frequency) from rxdata (samples over time)  
 rxdataF is the rxdata in frequency domain, phase aligned
 {: .func3}

executables/nr-gnb.c

@@ -557,13 +557,7 @@ void init_eNB_afterRU(void) {
       for (i=0; i<gNB->RU_list[ru_id]->nb_rx; aa++,i++) {
         LOG_I(PHY,"Attaching RU %d antenna %d to gNB antenna %d\n",gNB->RU_list[ru_id]->idx,i,aa);
         gNB->prach_vars.rxsigF[aa]    =  gNB->RU_list[ru_id]->prach_rxsigF[0][i];
-#if 0
-printf("before %p\n", gNB->common_vars.rxdataF[aa]);
-#endif
         gNB->common_vars.rxdataF[aa]     =  gNB->RU_list[ru_id]->common.rxdataF[i];
-#if 0
-printf("after %p\n", gNB->common_vars.rxdataF[aa]);
-#endif
       }
     }
 

openair1/PHY/INIT/nr_init.c

@@ -627,6 +627,8 @@ int phy_init_nr_gNB(PHY_VARS_gNB *gNB,
 
   common_vars->txdataF = (int32_t **)malloc16(Ptx*sizeof(int32_t*));
   common_vars->rxdataF = (int32_t **)malloc16(Prx*sizeof(int32_t*));
+  /* Do NOT allocate per-antenna txdataF/rxdataF: the gNB gets a pointer to the
+   * RU to copy/recover freq-domain memory from there */
   common_vars->beam_id = (uint8_t **)malloc16(Ptx*sizeof(uint8_t*));
 
   for (i=0;i<Ptx;i++){
@@ -637,9 +639,6 @@ int phy_init_nr_gNB(PHY_VARS_gNB *gNB,
     common_vars->beam_id[i] = (uint8_t*)malloc16_clear(fp->symbols_per_slot*fp->slots_per_frame*sizeof(uint8_t));
     memset(common_vars->beam_id[i],255,fp->symbols_per_slot*fp->slots_per_frame);
   }
-  for (i=0;i<Prx;i++){
-    common_vars->rxdataF[i] = (int32_t*)malloc16_clear(fp->samples_per_frame_wCP*sizeof(int32_t));
-  }
   common_vars->debugBuff = (int32_t*)malloc16_clear(fp->samples_per_frame*sizeof(int32_t)*100);	
   common_vars->debugBuff_sample_offset = 0; 
 
@@ -782,10 +781,8 @@ void phy_free_nr_gNB(PHY_VARS_gNB *gNB)
     free_and_zero(common_vars->beam_id[i]);
   }
 
-  for (int i = 0; i < Prx; ++i) {
-    free_and_zero(common_vars->rxdataF[i]);
-  }
-
+  /* Do NOT free per-antenna txdataF/rxdataF: the gNB gets a pointer to the
+   * RU's txdataF/rxdataF, and the RU will free that */
   free_and_zero(common_vars->txdataF);
   free_and_zero(common_vars->rxdataF);
   free_and_zero(common_vars->beam_id);

openair1/PHY/INIT/nr_init_ru.c

@@ -201,10 +201,8 @@ void nr_phy_free_RU(RU_t *ru)
     free_and_zero(ru->common.txdataF_BF);
 
     // free FFT output buffers (RX)
-    // HACK: cannot free here, or the gNB code in phy_free_nr_gNB() will
-    // segfault. The rxdataF memory between RU and gNB is not properly handled!
-    //for (i = 0; i < ru->nb_rx; i++) free_and_zero(ru->common.rxdataF[i]);
-    //free_and_zero(ru->common.rxdataF);
+    for (i = 0; i < ru->nb_rx; i++) free_and_zero(ru->common.rxdataF[i]);
+      free_and_zero(ru->common.rxdataF);
 
     for (j=0;j<NUMBER_OF_NR_RU_PRACH_OCCASIONS_MAX;j++) {
       for (i = 0; i < ru->nb_rx; i++)

openair1/PHY/defs_gNB.h

@@ -396,10 +396,6 @@ typedef struct {
 } NR_gNB_SRS_t;
 
 typedef struct {
-  /// \brief Pointers (dynamic) to the received data in the time domain.
-  /// - first index: rx antenna [0..nb_antennas_rx[
-  /// - second index: ? [0..2*ofdm_symbol_size*frame_parms->symbols_per_tti[
-  int32_t **rxdata;
   /// \brief Pointers (dynamic) to the received data in the frequency domain.
   /// - first index: rx antenna [0..nb_antennas_rx[
   /// - second index: ? [0..2*ofdm_symbol_size*frame_parms->symbols_per_tti[

openair1/SCHED_NR/phy_procedures_nr_gNB.c

@@ -582,33 +582,6 @@ void fill_ul_rb_mask(PHY_VARS_gNB *gNB, int frame_rx, int slot_rx) {
 
 }
 
-void phy_procedures_gNB_common_RX(PHY_VARS_gNB *gNB, int frame_rx, int slot_rx) {
-
-  uint8_t symbol;
-  unsigned char aa;
-
-  for(symbol = 0; symbol < (gNB->frame_parms.Ncp==EXTENDED?12:14); symbol++) {
-    for (aa = 0; aa < gNB->frame_parms.nb_antennas_rx; aa++) {
-      nr_slot_fep_ul(&gNB->frame_parms,
-                     gNB->common_vars.rxdata[aa],
-                     gNB->common_vars.rxdataF[aa],
-                     symbol,
-                     slot_rx,
-                     0);
-    }
-  }
-
-  for (aa = 0; aa < gNB->frame_parms.nb_antennas_rx; aa++) {
-    apply_nr_rotation_ul(&gNB->frame_parms,
-			 gNB->common_vars.rxdataF[aa],
-			 slot_rx,
-			 0,
-			 gNB->frame_parms.Ncp==EXTENDED?12:14,
-			 gNB->frame_parms.ofdm_symbol_size);
-  }
-
-}
-
 int fill_srs_reported_symbol_list(nfapi_nr_srs_indication_reported_symbol_t *reported_symbol_list,
                                   const nfapi_nr_srs_pdu_t *srs_pdu,
                                   const int N_RB_UL,

openair1/SCHED_NR/sched_nr.h

@@ -37,7 +37,6 @@
 void fill_ul_rb_mask(PHY_VARS_gNB *gNB, int frame_rx, int slot_rx);
 void nr_set_ssb_first_subcarrier(nfapi_nr_config_request_scf_t *cfg, NR_DL_FRAME_PARMS *fp);
 void phy_procedures_gNB_TX(processingData_L1tx_t *msgTx, int frame_tx, int slot_tx, int do_meas);
-void phy_procedures_gNB_common_RX(PHY_VARS_gNB *gNB, int frame_rx, int slot_rx);
 int  phy_procedures_gNB_uespec_RX(PHY_VARS_gNB *gNB, int frame_rx, int slot_rx);
 void L1_nr_prach_procedures(PHY_VARS_gNB *gNB,int frame,int slot);
 void nr_common_signal_procedures (PHY_VARS_gNB *gNB,int frame,int slot,nfapi_nr_dl_tti_ssb_pdu ssb_pdu);

openair1/SIMULATION/NR_PHY/pucchsim.c

@@ -390,6 +390,10 @@ int main(int argc, char **argv)
   cfg->carrier_config.num_rx_ant.value = n_rx;
   nr_phy_config_request_sim(gNB,N_RB_DL,N_RB_DL,mu,Nid_cell,SSB_positions);
   phy_init_nr_gNB(gNB,0,0);
+  /* RU handles rxdataF, and gNB just has a pointer. Here, we don't have an RU,
+   * so we need to allocate that memory as well. */
+  for (i = 0; i < n_rx; i++)
+    gNB->common_vars.rxdataF[i] = malloc16_clear(gNB->frame_parms.samples_per_frame_wCP*sizeof(int32_t));
 
   double fs,txbw,rxbw;
   uint32_t samples;
@@ -702,6 +706,8 @@ int main(int argc, char **argv)
   free_channel_desc_scm(UE2gNB);
   term_freq_channel();
 
+  for (i = 0; i < n_rx; i++)
+    free(gNB->common_vars.rxdataF[i]);
   phy_free_nr_gNB(gNB);
   free(RC.gNB[0]);
   free(RC.gNB);

openair1/SIMULATION/NR_PHY/ulsim.c

@@ -794,8 +794,17 @@ int main(int argc, char **argv)
   gNB->chest_freq = chest_type[0];
   gNB->chest_time = chest_type[1];
   phy_init_nr_gNB(gNB,0,1);
+  /* RU handles rxdataF, and gNB just has a pointer. Here, we don't have an RU,
+   * so we need to allocate that memory as well. */
+  for (i = 0; i < n_rx; i++)
+    gNB->common_vars.rxdataF[i] = malloc16_clear(gNB->frame_parms.samples_per_frame_wCP*sizeof(int32_t));
   N_RB_DL = gNB->frame_parms.N_RB_DL;
 
+  /* no RU: need to have rxdata */
+  c16_t **rxdata;
+  rxdata = malloc(n_rx * sizeof(*rxdata));
+  for (int i = 0; i < n_rx; ++i)
+    rxdata[i] = malloc(gNB->frame_parms.samples_per_frame * sizeof(**rxdata));
 
   NR_BWP_Uplink_t *ubwp=secondaryCellGroup->spCellConfig->spCellConfigDedicated->uplinkConfig->uplinkBWP_ToAddModList->list.array[0];
 
@@ -1025,18 +1034,16 @@ int main(int argc, char **argv)
     fseek(input_fd,file_offset*sizeof(int16_t)*2,SEEK_SET);
     for (int irx=0; irx<frame_parms->nb_antennas_rx; irx++) {
       fseek(input_fd,irx*(slot_length+15)*sizeof(int16_t)*2,SEEK_SET); // matlab adds samlples to the end to emulate channel delay
-      read_errors+=fread((void*)&gNB->common_vars.rxdata[irx][slot_offset-delay],
-      sizeof(int16_t),
-      slot_length<<1,
-      input_fd);
+      read_errors += fread((void *)&rxdata[irx][slot_offset-delay], sizeof(int16_t), slot_length<<1, input_fd);
       if (read_errors==0) {
         printf("error reading file\n");
         exit(1);
       }
-      for (int i=0;i<16;i+=2) printf("slot_offset %d : %d,%d\n",
+      for (int i=0;i<16;i+=2)
+        printf("slot_offset %d : %d,%d\n",
                slot_offset,
-             ((int16_t*)&gNB->common_vars.rxdata[irx][slot_offset])[i],
-             ((int16_t*)&gNB->common_vars.rxdata[irx][slot_offset])[1+i]);
+               rxdata[irx][slot_offset].r,
+               rxdata[irx][slot_offset].i);
     }
 
     mod_order = nr_get_Qm_ul(Imcs, mcs_table);
@@ -1325,12 +1332,11 @@ int main(int argc, char **argv)
 
         for (i=0; i<slot_length; i++) {
           for (ap=0; ap<frame_parms->nb_antennas_rx; ap++) {
-            ((int16_t*) &gNB->common_vars.rxdata[ap][slot_offset])[(2*i)   + (delay*2)] = (int16_t)((r_re[ap][i]) + (sqrt(sigma/2)*gaussdouble(0.0,1.0))); // convert to fixed point
-            ((int16_t*) &gNB->common_vars.rxdata[ap][slot_offset])[(2*i)+1 + (delay*2)] = (int16_t)((r_im[ap][i]) + (sqrt(sigma/2)*gaussdouble(0.0,1.0)));
+            rxdata[ap][slot_offset+i+delay].r = (int16_t)((r_re[ap][i]) + (sqrt(sigma/2)*gaussdouble(0.0,1.0))); // convert to fixed point
+            rxdata[ap][slot_offset+i+delay].i = (int16_t)((r_im[ap][i]) + (sqrt(sigma/2)*gaussdouble(0.0,1.0)));
             /* Add phase noise if enabled */
             if (pdu_bit_map & PUSCH_PDU_BITMAP_PUSCH_PTRS) {
-              phase_noise(ts, &((int16_t*)&gNB->common_vars.rxdata[ap][slot_offset])[(2*i)],
-                          &((int16_t*)&gNB->common_vars.rxdata[ap][slot_offset])[(2*i)+1]);
+              phase_noise(ts, &rxdata[ap][slot_offset].r, &rxdata[ap][slot_offset].i);
             }
           }
         }
@@ -1356,19 +1362,36 @@ int main(int argc, char **argv)
 	gNB->UL_INFO.rx_ind.number_of_pdus = 0;
 	gNB->UL_INFO.crc_ind.number_crcs = 0;
 
-    phy_procedures_gNB_common_RX(gNB, frame, slot);
+        for(uint8_t symbol = 0; symbol < (gNB->frame_parms.Ncp == EXTENDED ? 12 : 14); symbol++) {
+          for (int aa = 0; aa < gNB->frame_parms.nb_antennas_rx; aa++)
+            nr_slot_fep_ul(&gNB->frame_parms,
+                           (int32_t*) rxdata[aa],
+                           gNB->common_vars.rxdataF[aa],
+                           symbol,
+                           slot,
+                           0);
+        }
+
+        for (int aa = 0; aa < gNB->frame_parms.nb_antennas_rx; aa++)  {
+          apply_nr_rotation_ul(&gNB->frame_parms,
+                               gNB->common_vars.rxdataF[aa],
+                               slot,
+                               0,
+                               gNB->frame_parms.Ncp == EXTENDED ? 12 : 14,
+                               gNB->frame_parms.ofdm_symbol_size);
+        }
 
     ul_proc_error = phy_procedures_gNB_uespec_RX(gNB, frame, slot);
 
     if (n_trials==1 && round==0) {
-      LOG_M("rxsig0.m","rx0",&gNB->common_vars.rxdata[0][slot_offset],slot_length,1,1);
+      LOG_M("rxsig0.m","rx0",&rxdata[0][slot_offset],slot_length,1,1);
       LOG_M("rxsigF0.m","rxsF0",gNB->common_vars.rxdataF[0],14*frame_parms->ofdm_symbol_size,1,1);
       if (precod_nbr_layers > 1) {
-        LOG_M("rxsig1.m","rx1",&gNB->common_vars.rxdata[1][slot_offset],slot_length,1,1);
+        LOG_M("rxsig1.m","rx1",&rxdata[1][slot_offset],slot_length,1,1);
         LOG_M("rxsigF1.m","rxsF1",gNB->common_vars.rxdataF[1],14*frame_parms->ofdm_symbol_size,1,1);
         if (precod_nbr_layers==4) {
-          LOG_M("rxsig2.m","rx2",&gNB->common_vars.rxdata[2][slot_offset],slot_length,1,1);
-          LOG_M("rxsig3.m","rx3",&gNB->common_vars.rxdata[3][slot_offset],slot_length,1,1);
+          LOG_M("rxsig2.m","rx2",&rxdata[2][slot_offset],slot_length,1,1);
+          LOG_M("rxsig3.m","rx3",&rxdata[3][slot_offset],slot_length,1,1);
           LOG_M("rxsigF2.m","rxsF2",gNB->common_vars.rxdataF[2],14*frame_parms->ofdm_symbol_size,1,1);
           LOG_M("rxsigF3.m","rxsF3",gNB->common_vars.rxdataF[3],14*frame_parms->ofdm_symbol_size,1,1);
         }