Basic start/stop of nr-softmodem

executables/nr-softmodem.c

@@ -548,6 +548,119 @@ void terminate_task(task_id_t task_id, module_id_t mod_id) {
 //extern void  free_transport(PHY_VARS_gNB *);
 extern void  nr_phy_free_RU(RU_t *);
 
+#include "openair2/LAYER2/NR_MAC_gNB/mac_proto.h"
+#include "openair2/LAYER2/NR_MAC_gNB/nr_mac_gNB.h"
+int stop_L1L2(module_id_t gnb_id)
+{
+  LOG_W(GNB_APP, "stopping nr-softmodem\n");
+  oai_exit = 1;
+
+  if (!RC.ru) {
+    LOG_F(GNB_APP, "no RU configured\n");
+    return -1;
+  }
+
+  /* stop trx devices, multiple carrier currently not supported by RU */
+  if (RC.ru[gnb_id]) {
+    AssertFatal(RC.ru[gnb_id]->rfdevice.trx_stop_func != NULL, "cannot call rfdevice.trx_stop_func(), is NULL\n");
+    RC.ru[gnb_id]->rfdevice.trx_stop_func(&RC.ru[gnb_id]->rfdevice);
+    LOG_I(GNB_APP, "turned off RU rfdevice\n");
+
+    /*
+    AssertFatal(RC.ru[gnb_id]->ifdevice.trx_stop_func != NULL, "cannot call ifdevice.trx_stop_func(), is NULL\n");
+    RC.ru[gnb_id]->ifdevice.trx_stop_func(&RC.ru[gnb_id]->ifdevice);
+    LOG_I(GNB_APP, "turned off RU ifdevice\n");
+    */
+  }
+
+  /* these tasks need to pick up new configuration */
+  /*
+  terminate_task(TASK_RRC_GNB, gnb_id);
+  */
+  gNB_MAC_INST *mac = RC.nrmac[0];
+  mac->f1_config.setup_resp = NULL;
+  MessageDef *msg = itti_alloc_new_message (TASK_GNB_APP, 0, F1AP_LOST_CONNECTION);
+  itti_send_msg_to_task (TASK_RRC_GNB, 0, msg);
+
+  if (RC.nb_nr_L1_inst > 0)
+    stop_gNB(RC.nb_nr_L1_inst);
+
+  if (RC.nb_RU > 0)
+    stop_RU(RC.nb_RU);
+
+  /* release memory used by the RU/gNB threads (incomplete), after all
+   * threads have been stopped (they partially use the same memory) */
+  for (int inst = 0; inst < RC.nb_RU; inst++) {
+    nr_phy_free_RU(RC.ru[inst]);
+  }
+
+  for (int inst = 0; inst < RC.nb_nr_L1_inst; inst++) {
+    phy_free_nr_gNB(RC.gNB[inst]);
+  }
+  oai_exit = 0;
+  return 0;
+}
+
+/*
+ * Restart the nr-softmodem after it has been soft-stopped with stop_L1L2()
+ */
+int start_L1L2(module_id_t gnb_id)
+{
+  //RU_t *ru = RC.ru[gnb_id];
+  //MessageDef *msg_p = NULL;
+  LOG_W(GNB_APP, "restarting nr-softmodem\n");
+  /* block threads */
+  sync_var = -1;
+  RC.gNB[gnb_id]->configured = 0;
+  extern void init_sched_response(void);
+  init_sched_response();
+  /*
+  RC.ru_mask |= (1 << ru->idx);
+  set_function_spec_param(RC.ru[gnb_id]);
+  LOG_I(GNB_APP, "attempting to create ITTI tasks\n");
+  */
+  // No more rrc thread, as many race conditions are hidden behind
+
+  //int rc = itti_create_task (TASK_RRC_GNB, rrc_gnb_task, NULL);
+  //AssertFatal(rc == 0, "could not create RRC task\n");
+  /* pass a reconfiguration request which will configure everything down to
+   * RC.eNB[i][j]->frame_parms, too */
+  /*
+  msg_p = itti_alloc_new_message(TASK_GNB_APP, 0, NRRRC_CONFIGURATION_REQ);
+  NRRRC_CONFIGURATION_REQ(msg_p) = RC.nrrrc[gnb_id]->configuration;
+  itti_send_msg_to_task(TASK_RRC_GNB, 0, msg_p);
+  */
+  gNB_MAC_INST *mac = RC.nrmac[0];
+  NR_ServingCellConfigCommon_t *scc = mac->common_channels[0].ServingCellConfigCommon;
+  nr_mac_config_scc(mac, scc, &mac->radio_config);
+
+  /* send new F1 Setup Request to RRC */
+  NR_BCCH_BCH_Message_t *mib = mac->common_channels[0].mib;
+  NR_BCCH_DL_SCH_Message_t *sib1 = mac->common_channels[0].sib1;
+  f1ap_setup_req_t *old = mac->f1_config.setup_req;
+  const f1ap_served_cell_info_t *info = &old->cell[0].info;
+  f1ap_setup_req_t *req = RC_read_F1Setup(old->gNB_DU_id, old->gNB_DU_name, info, scc, mib, sib1);
+  AssertFatal(req != NULL, "could not read F1 Setup information\n");
+  RC.nrmac[0]->f1_config.setup_req = req;
+  nr_mac_send_f1_setup_req();
+
+  //wait_gNBs();
+  init_NR_RU(config_get_if(), NULL);
+  wait_f1_setup_response();
+  start_NR_RU();
+  //ru->rf_map.carD = 0;
+  //ru->rf_map.chain = 0; /* CC_id + chain_offset;*/
+  wait_RUs();
+  // TODO eNB->RU_list[ru_id]->common.rxdataF
+  init_eNB_afterRU();
+  printf("Sending sync to all threads\n");
+  pthread_mutex_lock(&sync_mutex);
+  sync_var=0;
+  pthread_cond_broadcast(&sync_cond);
+  pthread_mutex_unlock(&sync_mutex);
+  return 0;
+}
+
 static  void wait_nfapi_init(char *thread_name) {
   printf( "waiting for NFAPI PNF connection and population of global structure (%s)\n",thread_name);
   pthread_mutex_lock( &nfapi_sync_mutex );

openair1/PHY/INIT/nr_init.c

@@ -550,11 +550,6 @@ void nr_phy_config_request(NR_PHY_Config_t *phy_config)
   nr_init_frame_parms(gNB_config, fp);
   
 
-  if (RC.gNB[Mod_id]->configured == 1) {
-    LOG_E(PHY,"Already gNB already configured, do nothing\n");
-    return;
-  }
-
   fd_occasion = 0;
   nfapi_nr_prach_config_t *prach_config = &gNB_config->prach_config;
   short_sequence = prach_config->prach_sequence_length.value;

openair1/PHY/INIT/nr_init_ru.c

@@ -217,4 +217,8 @@ void nr_phy_free_RU(RU_t *ru)
     }
   }
   free_and_zero(ru->common.sync_corr);
+
+  PHY_VARS_gNB *gNB0= ru->gNB_list[0];
+  gNB0->num_RU--;
+  DevAssert(gNB0->num_RU >= 0);
 }

openair2/F1AP/f1ap_ids.c

@@ -37,7 +37,7 @@ static pthread_mutex_t cu2du_mutex = PTHREAD_MUTEX_INITIALIZER;
 void cu_init_f1_ue_data(void)
 {
   pthread_mutex_lock(&cu2du_mutex);
-  DevAssert(cu2du_ue_mapping == NULL);
+  if (cu2du_ue_mapping == NULL) // hack: there is nothing to free this properly
     cu2du_ue_mapping = hashtable_create(1319, NULL, free); // 1319 is prime, default hash func (unit), free()
   DevAssert(cu2du_ue_mapping != NULL);
   pthread_mutex_unlock(&cu2du_mutex);

openair2/NR_PHY_INTERFACE/nr_sched_response.c

@@ -55,17 +55,7 @@ static bool resp_freelist_inited = false;
 
 void init_sched_response(void)
 {
-  /* init only once */
-  if (pthread_mutex_lock(&resp_mutex))
-    AssertFatal(0, "pthread_mutex_lock failed\n");
-  if (resp_freelist_inited) {
-    if (pthread_mutex_unlock(&resp_mutex))
-      AssertFatal(0, "pthread_mutex_unlock failed\n");
-    return;
-  }
   resp_freelist_inited = true;
-  if (pthread_mutex_unlock(&resp_mutex))
-    AssertFatal(0, "pthread_mutex_unlock failed\n");
 
   int i;
   for (i = 0; i < N_RESP - 1; i++)

openair2/RRC/NR/rrc_gNB.c

@@ -2305,6 +2305,7 @@ void *rrc_gnb_task(void *args_p) {
     switch (ITTI_MSG_ID(msg_p)) {
       case TERMINATE_MESSAGE:
         LOG_W(NR_RRC, " *** Exiting NR_RRC thread\n");
+        timer_remove(stats_timer_id);
         itti_exit_task();
         break;
 

radio/rfsimulator/simulator.c

@@ -670,6 +670,15 @@ static int startServer(openair0_device *device) {
   return 0;
 }
 
+static void rfsimulator_end(openair0_device *device);
+static void stopServer(openair0_device *device)
+{
+  rfsimulator_state_t *t = (rfsimulator_state_t *) device->priv;
+  DevAssert(t != NULL);
+  rfsimulator_end(device);
+  close(t->listen_sock);
+}
+
 static int startClient(openair0_device *device) {
   rfsimulator_state_t *t = device->priv;
   t->role = SIMU_ROLE_CLIENT;
@@ -1047,10 +1056,11 @@ static void rfsimulator_end(openair0_device *device) {
   rfsimulator_state_t* s = device->priv;
   for (int i = 0; i < MAX_FD_RFSIMU; i++) {
     buffer_t *b = &s->buf[i];
-    if (b->conn_sock >= 0 )
-      close(b->conn_sock);
+    if (b->conn_sock >= 0 ) {
+      removeCirBuf(s, b->conn_sock);
+    }
   }
-  close(s->epollfd);
+  //close(s->epollfd); // don't close as we cannot restart with startServer()/startClient()
 }
 static int rfsimulator_stop(openair0_device *device) {
   return 0;
@@ -1084,7 +1094,7 @@ int device_init(openair0_device *device, openair0_config_t *openair0_cfg) {
   device->trx_start_func = rfsimulator->role == SIMU_ROLE_SERVER ? startServer : startClient;
   device->trx_get_stats_func   = rfsimulator_get_stats;
   device->trx_reset_stats_func = rfsimulator_reset_stats;
-  device->trx_end_func         = rfsimulator_end;
+  device->trx_end_func         = rfsimulator->role == SIMU_ROLE_SERVER ? stopServer : rfsimulator_end;
   device->trx_stop_func        = rfsimulator_stop;
   device->trx_set_freq_func    = rfsimulator_set_freq;
   device->trx_set_gains_func   = rfsimulator_set_gains;