Simplify DLSCH: only one codeword supported

openair1/PHY/INIT/nr_init.c

@@ -408,14 +408,10 @@ void init_DLSCH_struct(PHY_VARS_gNB *gNB, processingData_L1tx_t *msg)
   uint16_t grid_size = cfg->carrier_config.dl_grid_size[fp->numerology_index].value;
   msg->num_pdsch_slot = 0;
 
-  msg->dlsch = malloc16(gNB->max_nb_pdsch * sizeof(NR_gNB_DLSCH_t *));
-  int num_cw = NR_MAX_NB_LAYERS > 4? 2:1;
+  msg->dlsch = calloc(gNB->max_nb_pdsch, sizeof(*msg->dlsch));
   for (int i = 0; i < gNB->max_nb_pdsch; i++) {
     LOG_D(PHY, "Allocating Transport Channel Buffers for DLSCH %d/%d\n", i, gNB->max_nb_pdsch);
-    msg->dlsch[i] = (NR_gNB_DLSCH_t *)malloc16(num_cw * sizeof(NR_gNB_DLSCH_t));
-    for (int j = 0; j < num_cw; j++) {
-      msg->dlsch[i][j] = new_gNB_dlsch(fp, grid_size);
-    }
+    msg->dlsch[i] = new_gNB_dlsch(fp, grid_size);
   }
 }
 
@@ -424,12 +420,8 @@ void reset_DLSCH_struct(const PHY_VARS_gNB *gNB, processingData_L1tx_t *msg)
   const NR_DL_FRAME_PARMS *fp = &gNB->frame_parms;
   const nfapi_nr_config_request_scf_t *cfg = &gNB->gNB_config;
   const uint16_t grid_size = cfg->carrier_config.dl_grid_size[fp->numerology_index].value;
-  int num_cw = NR_MAX_NB_LAYERS > 4? 2:1;
   for (int i = 0; i < gNB->max_nb_pdsch; i++) {
-    for (int j = 0; j < num_cw; j++) {
-      free_gNB_dlsch(&msg->dlsch[i][j], grid_size, fp);
-    }
-    free(msg->dlsch[i]);
+    free_gNB_dlsch(&msg->dlsch[i], grid_size, fp);
   }
   free(msg->dlsch);
 }

openair1/PHY/NR_TRANSPORT/nr_dlsch.c

@@ -789,7 +789,7 @@ void nr_generate_pdsch(processingData_L1tx_t *msgTx, int frame, int slot)
   size_t size_output = 0;
 
   for (int dlsch_id = 0; dlsch_id < msgTx->num_pdsch_slot; dlsch_id++) {
-    NR_gNB_DLSCH_t *dlsch = msgTx->dlsch[dlsch_id];
+    NR_gNB_DLSCH_t *dlsch = &msgTx->dlsch[dlsch_id];
     const nfapi_nr_dl_tti_pdsch_pdu_rel15_t *rel15 = &dlsch->pdsch_pdu.pdsch_pdu_rel15;
 
     LOG_D(PHY,
@@ -850,7 +850,7 @@ void nr_generate_pdsch(processingData_L1tx_t *msgTx, int frame, int slot)
 
   unsigned char *output_ptr = output;
   for (int dlsch_id = 0; dlsch_id < msgTx->num_pdsch_slot; dlsch_id++) {
-    output_ptr += do_one_dlsch(output_ptr, gNB, msgTx->dlsch[dlsch_id], slot);
+    output_ptr += do_one_dlsch(output_ptr, gNB, &msgTx->dlsch[dlsch_id], slot);
   }
 }
 

openair1/PHY/NR_TRANSPORT/nr_dlsch_coding.c

@@ -134,7 +134,7 @@ int nr_dlsch_encoding(PHY_VARS_gNB *gNB,
   int num_segments = 0;
 
   for (int dlsch_id = 0; dlsch_id < msgTx->num_pdsch_slot; dlsch_id++) {
-    NR_gNB_DLSCH_t *dlsch = msgTx->dlsch[dlsch_id];
+    NR_gNB_DLSCH_t *dlsch = &msgTx->dlsch[dlsch_id];
 
     unsigned int crc = 1;
     const nfapi_nr_dl_tti_pdsch_pdu_rel15_t *rel15 = &dlsch->pdsch_pdu.pdsch_pdu_rel15;
@@ -222,7 +222,7 @@ int nr_dlsch_encoding(PHY_VARS_gNB *gNB,
   size_t dlsch_offset = 0;
 
   for (int dlsch_id = 0; dlsch_id < msgTx->num_pdsch_slot; dlsch_id++) {
-    NR_gNB_DLSCH_t *dlsch = msgTx->dlsch[dlsch_id];
+    NR_gNB_DLSCH_t *dlsch = &msgTx->dlsch[dlsch_id];
     const nfapi_nr_dl_tti_pdsch_pdu_rel15_t *rel15 = &dlsch->pdsch_pdu.pdsch_pdu_rel15;
 
     nrLDPC_TB_encoding_parameters_t *TB_parameters = &TBs[dlsch_id];

openair1/PHY/NR_TRANSPORT/nr_dlsch_tools.c

@@ -36,7 +36,7 @@
 
 void nr_fill_dlsch_dl_tti_req(processingData_L1tx_t *msgTx, nfapi_nr_dl_tti_pdsch_pdu *pdsch_pdu)
 {
-  NR_gNB_DLSCH_t *dlsch = &msgTx->dlsch[msgTx->num_pdsch_slot][0];
+  NR_gNB_DLSCH_t *dlsch = &msgTx->dlsch[msgTx->num_pdsch_slot];
   /// DLSCH struct
   memcpy((void*)&dlsch->pdsch_pdu, (void*)pdsch_pdu, sizeof(nfapi_nr_dl_tti_pdsch_pdu));
   AssertFatal(msgTx->num_pdsch_slot == pdsch_pdu->pdsch_pdu_rel15.pduIndex,
@@ -53,7 +53,7 @@ void nr_fill_dlsch_tx_req(processingData_L1tx_t *msgTx, int idx, uint8_t *sdu)
 
   /* not sure if FAPI could transmit DL_TTI_req and TX_req in different orders.
    * for the moment, assume they are in the same order (and check!) */
-  NR_gNB_DLSCH_t *dlsch = &msgTx->dlsch[idx][0];
+  NR_gNB_DLSCH_t *dlsch = &msgTx->dlsch[idx];
   nfapi_nr_dl_tti_pdsch_pdu *pdsch = &dlsch->pdsch_pdu;
   AssertFatal(pdsch->pdsch_pdu_rel15.pduIndex == idx, "PDSCH PDU index %d does not match %d\n", pdsch->pdsch_pdu_rel15.pduIndex, idx);
   dlsch->pdu = sdu;

openair1/PHY/defs_gNB.h

@@ -580,7 +580,7 @@ typedef struct processingData_L1tx {
   /// corresponds to UL_dci_req->ul_dci_pdu_list
   nfapi_nr_dl_tti_pdcch_pdu ul_pdcch_pdu[NFAPI_NR_MAX_NB_CORESETS];
   nfapi_nr_dl_tti_csi_rs_pdu csirs_pdu[NFAPI_NR_MAX_NB_CORESETS];
-  NR_gNB_DLSCH_t **dlsch;
+  NR_gNB_DLSCH_t *dlsch;
   nfapi_nr_dl_tti_ssb_pdu ssb_pdu[64];
   int n_ssb_pdu;
   int n_csirs_pdu;

openair1/SIMULATION/NR_PHY/dlschsim.c

@@ -441,7 +441,7 @@ int main(int argc, char **argv)
 	unsigned char harq_pid = 0; //dlsch->harq_ids[subframe];
   processingData_L1tx_t msgDataTx;
   init_DLSCH_struct(gNB, &msgDataTx);
-  NR_gNB_DLSCH_t *dlsch = &msgDataTx.dlsch[0][0];
+  NR_gNB_DLSCH_t *dlsch = &msgDataTx.dlsch[0];
   nfapi_nr_dl_tti_pdsch_pdu_rel15_t *rel15 = &dlsch->pdsch_pdu.pdsch_pdu_rel15;
 	//time_stats_t *rm_stats, *te_stats, *i_stats;
 	unsigned int TBS = 8424;

openair1/SIMULATION/NR_PHY/dlsim.c

@@ -1058,7 +1058,7 @@ int main(int argc, char **argv)
     n_false_positive = 0;
     if (n_trials== 1) num_rounds = 1;
 
-    NR_gNB_DLSCH_t *gNB_dlsch = &msgDataTx->dlsch[0][0];
+    NR_gNB_DLSCH_t *gNB_dlsch = &msgDataTx->dlsch[0];
     nfapi_nr_dl_tti_pdsch_pdu_rel15_t *rel15 = &gNB_dlsch->pdsch_pdu.pdsch_pdu_rel15;
 
     for (trial = 0; trial < n_trials && !stop; trial++) {