use dedicated UL harq config

- this patch changes the UL harq config to a dedicated one
  instead of passing the whole MAC config which may be specific to
  a specific RAT
- it also extends the RRC to fill the harq specific config field in the
  MAC config
- clean up dl_harq and remove unused mac config

srsue/hdr/mac/dl_harq.h

@@ -58,11 +58,10 @@ public:
     pcap = NULL;
   }
     
-  bool init(srslte::log *log_h_, mac_interface_rrc::mac_cfg_t *mac_cfg_, srslte::timers *timers_, demux *demux_unit_)
+  bool init(srslte::log *log_h_, srslte::timers *timers_, demux *demux_unit_)
   {
     timers_db  = timers_; 
     demux_unit = demux_unit_; 
-    mac_cfg    = mac_cfg_; 
     si_window_start = 0; 
     log_h = log_h_; 
     for (uint32_t i=0;i<N+1;i++) {
@@ -347,7 +346,6 @@ private:
 
   std::vector<dl_harq_process> proc;
   srslte::timers   *timers_db;
-  mac_interface_rrc::mac_cfg_t *mac_cfg; 
   demux           *demux_unit; 
   srslte::log     *log_h;
   srslte::mac_pcap *pcap; 

srsue/hdr/mac/ul_harq.h

@@ -59,21 +59,21 @@ public:
     timers_db   = NULL; 
     mux_unit    = NULL; 
     log_h       = NULL; 
-    mac_cfg     = NULL; 
+    params      = NULL;
     rntis       = NULL; 
     average_retx = 0; 
     nof_pkts     = 0;
   }
 
   bool init(srslte::log *log_h_, 
-            mac_interface_rrc::ue_rnti_t *rntis_, 
+            mac_interface_rrc_common::ue_rnti_t *rntis_,
-            mac_interface_rrc::mac_cfg_t *mac_cfg_, 
+            mac_interface_rrc_common::ul_harq_params_t *params_,
             srslte::timers* timers_db_, 
             mux *mux_unit_)
   {
     log_h     = log_h_;
     mux_unit  = mux_unit_;
-    mac_cfg   = mac_cfg_;
+    params    = params_;
     rntis     = rntis_;
     timers_db = timers_db_;
     for (uint32_t i=0;i<N;i++) {
@@ -201,9 +201,9 @@ private:
     {
       uint32_t max_retx;
       if (is_msg3) {
-        max_retx = harq_entity->mac_cfg->rach.max_harq_msg3_tx;
+        max_retx = harq_entity->params->max_harq_msg3_tx;
       } else {
-        max_retx = liblte_rrc_max_harq_tx_num[harq_entity->mac_cfg->main.ulsch_cnfg.max_harq_tx];
+        max_retx = harq_entity->params->max_harq_tx;
       }
 
       // Receive and route HARQ feedbacks
@@ -409,8 +409,8 @@ private:
   srslte::log     *log_h;
   srslte::mac_pcap *pcap; 
 
-  mac_interface_rrc::ue_rnti_t *rntis;
+  mac_interface_rrc_common::ue_rnti_t *rntis;
-  mac_interface_rrc::mac_cfg_t *mac_cfg; 
+  mac_interface_rrc_common::ul_harq_params_t *params;
   
   float            average_retx;   
   uint64_t         nof_pkts; 

srsue/src/mac/mac.cc

@@ -71,8 +71,8 @@ bool mac::init(phy_interface_mac *phy, rlc_interface_mac *rlc, rrc_interface_mac
   demux_unit.init   (phy_h, rlc_h, log_h,                                  &timers_db);
   ra_procedure.init (phy_h, rrc,   log_h, &uernti, &config,                &timers_db, &mux_unit, &demux_unit);
   sr_procedure.init (phy_h, rrc,   log_h,          &config);
-  ul_harq.init      (              log_h, &uernti, &config, &timers_db, &mux_unit);
+  ul_harq.init      (              log_h, &uernti, &config.ul_harq_params, &timers_db, &mux_unit);
-  dl_harq.init      (              log_h,          &config, &timers_db, &demux_unit);
+  dl_harq.init      (              log_h,                                  &timers_db, &demux_unit);
 
   reset();
   

srsue/src/upper/rrc.cc

@@ -990,6 +990,7 @@ void rrc::apply_sib2_configs()
   cfg.main.time_alignment_timer = sib2.time_alignment_timer; 
   memcpy(&cfg.rach, &sib2.rr_config_common_sib.rach_cnfg, sizeof(LIBLTE_RRC_RACH_CONFIG_COMMON_STRUCT)); 
   cfg.prach_config_index = sib2.rr_config_common_sib.prach_cnfg.root_sequence_index;
+  cfg.ul_harq_params.max_harq_msg3_tx = cfg.rach.max_harq_msg3_tx;
   mac->set_config(&cfg);
   
   rrc_log->info("Set RACH ConfigCommon: NofPreambles=%d, ResponseWindow=%d, ContentionResolutionTimer=%d ms\n",
@@ -1220,6 +1221,12 @@ void rrc::apply_mac_config_dedicated(LIBLTE_RRC_MAC_MAIN_CONFIG_STRUCT *mac_cnfg
   // Setup MAC configuration 
   mac->set_config_main(&default_cfg);
 
+  // Update UL HARQ config
+  mac_interface_rrc::mac_cfg_t cfg;
+  mac->get_config(&cfg);
+  cfg.ul_harq_params.max_harq_tx = liblte_rrc_max_harq_tx_num[default_cfg.ulsch_cnfg.max_harq_tx];
+  mac->set_config(&cfg);
+
   rrc_log->info("Set MAC main config: harq-MaxReTX=%d, bsr-TimerReTX=%d, bsr-TimerPeriodic=%d\n",
                 liblte_rrc_max_harq_tx_num[default_cfg.ulsch_cnfg.max_harq_tx],
                 liblte_rrc_retransmission_bsr_timer_num[default_cfg.ulsch_cnfg.retx_bsr_timer],