K0-K1 configuration from F1AP to SCH [Issue-ID: ODUHIGH-341]
[o-du/l2.git] / src / 5gnrmac / lwr_mac_fsm.c
index 4fea616..ffef575 100644 (file)
@@ -54,6 +54,8 @@ uint8_t UnrestrictedSetNcsTable[MAX_ZERO_CORR_CFG_IDX];
 void fapiMacConfigRsp(uint16_t cellId);
 uint16_t sendTxDataReq(SlotIndInfo currTimingInfo, DlSchedInfo *dlInfo, p_fapi_api_queue_elem_t prevElem);
 uint16_t fillUlTtiReq(SlotIndInfo currTimingInfo, p_fapi_api_queue_elem_t prevElem);
+uint16_t fillUlDciReq(SlotIndInfo currTimingInfo, p_fapi_api_queue_elem_t prevElem);
+uint8_t lwr_mac_procStopReqEvt(SlotIndInfo slotInfo, p_fapi_api_queue_elem_t  prevElem);
 
 void lwrMacLayerInit(Region region, Pool pool)
 {
@@ -2356,19 +2358,14 @@ uint8_t lwr_mac_procStartReqEvt(void *msg)
  *
  ********************************************************************/
 
-uint8_t lwr_mac_procStopReqEvt(void *msg)
+uint8_t lwr_mac_procStopReqEvt(SlotIndInfo slotInfo, p_fapi_api_queue_elem_t  prevElem)
 {
 #ifdef INTEL_FAPI
-   SlotIndInfo       *slotInfo;
-   fapi_msg_header_t *msgHeader;
    fapi_stop_req_t   *stopReq;
    fapi_vendor_msg_t *vendorMsg;
-   p_fapi_api_queue_elem_t  headerElem;
    p_fapi_api_queue_elem_t  stopReqElem;
    p_fapi_api_queue_elem_t  vendorMsgElem;
 
-   slotInfo = (SlotIndInfo *)msg;
-
    /* Allocte And fill Vendor msg */
    LWR_MAC_ALLOC(vendorMsgElem, (sizeof(fapi_api_queue_elem_t) + sizeof(fapi_vendor_msg_t)));
    if(!vendorMsgElem)
@@ -2379,8 +2376,8 @@ uint8_t lwr_mac_procStopReqEvt(void *msg)
    FILL_FAPI_LIST_ELEM(vendorMsgElem, NULLP, FAPI_VENDOR_MESSAGE, 1, sizeof(fapi_vendor_msg_t));
    vendorMsg = (fapi_vendor_msg_t *)(vendorMsgElem + 1);
    fillMsgHeader(&vendorMsg->header, FAPI_VENDOR_MESSAGE, sizeof(fapi_vendor_msg_t));
-   vendorMsg->stop_req_vendor.sfn = slotInfo->sfn;
-   vendorMsg->stop_req_vendor.slot = slotInfo->slot;
+   vendorMsg->stop_req_vendor.sfn = slotInfo.sfn;
+   vendorMsg->stop_req_vendor.slot = slotInfo.slot;
 
    /* Fill FAPI stop req */
    LWR_MAC_ALLOC(stopReqElem, (sizeof(fapi_api_queue_elem_t) + sizeof(fapi_stop_req_t)));
@@ -2396,24 +2393,9 @@ uint8_t lwr_mac_procStopReqEvt(void *msg)
    memset(stopReq, 0, sizeof(fapi_stop_req_t));
    fillMsgHeader(&stopReq->header, FAPI_STOP_REQUEST, sizeof(fapi_stop_req_t));
 
-   /* Fill message header */
-   LWR_MAC_ALLOC(headerElem, (sizeof(fapi_api_queue_elem_t) + sizeof(fapi_msg_header_t)));
-   if(!headerElem)
-   {
-      DU_LOG("\nERROR  -->  LWR_MAC: Memory allocation failed for header in stop req");
-      LWR_MAC_FREE(stopReqElem, (sizeof(fapi_api_queue_elem_t) + sizeof(fapi_stop_req_t)));
-      LWR_MAC_FREE(vendorMsgElem, (sizeof(fapi_api_queue_elem_t) + sizeof(fapi_vendor_msg_t)));
-      return RFAILED;
-   }
-   FILL_FAPI_LIST_ELEM(headerElem, stopReqElem, FAPI_VENDOR_MSG_HEADER_IND, 1, \
-      sizeof(fapi_msg_header_t));
-   msgHeader = (fapi_msg_header_t *)(headerElem + 1);
-   msgHeader->num_msg = 2; /* Stop req msg and vendor specific msg */
-   msgHeader->handle = 0;
-
    /* Send to PHY */
    DU_LOG("\nINFO  -->  LWR_MAC: Sending Stop Request to Phy");
-   LwrMacSendToL1(headerElem);
+   prevElem->p_next = stopReqElem;
 
 #endif
    return ROK;
@@ -3165,7 +3147,7 @@ uint8_t calcTxDataReqPduCount(DlSchedInfo *dlInfo)
 uint8_t fillSib1TxDataReq(fapi_tx_pdu_desc_t *pduDesc, uint16_t pduIndex, MacCellCfg *macCellCfg,
       PdschCfg pdschCfg)
 {
-   uint16_t payloadSize = 0;
+   uint32_t payloadSize = 0;
    uint8_t *sib1Payload = NULLP;
    fapi_api_queue_elem_t *payloadElem = NULLP;
 #ifdef INTEL_WLS_MEM
@@ -3177,8 +3159,8 @@ uint8_t fillSib1TxDataReq(fapi_tx_pdu_desc_t *pduDesc, uint16_t pduIndex, MacCel
 
    /* fill the TLV */
    payloadSize = pdschCfg.codeword[0].tbSize;
-   pduDesc[pduIndex].tlvs[0].tl.tag = FAPI_TX_DATA_PTR_TO_PAYLOAD_64;
-   pduDesc[pduIndex].tlvs[0].tl.length = payloadSize;
+   pduDesc[pduIndex].tlvs[0].tl.tag = ((payloadSize & 0xff0000) >> 8) | FAPI_TX_DATA_PTR_TO_PAYLOAD_64;
+   pduDesc[pduIndex].tlvs[0].tl.length = (payloadSize & 0x0000ffff);
    LWR_MAC_ALLOC(sib1Payload, payloadSize);
    if(sib1Payload == NULLP)
    {
@@ -3359,6 +3341,7 @@ uint16_t fillDlTtiReq(SlotIndInfo currTimingInfo)
    fapi_msg_header_t *msgHeader = NULLP;
    p_fapi_api_queue_elem_t dlTtiElem;
    p_fapi_api_queue_elem_t headerElem;
+   p_fapi_api_queue_elem_t prevElem;
 
    if(lwrMacCb.phyState == PHY_STATE_RUNNING)
    {
@@ -3375,158 +3358,188 @@ uint16_t fillDlTtiReq(SlotIndInfo currTimingInfo)
       if(dlTtiElem)
       {
          FILL_FAPI_LIST_ELEM(dlTtiElem, NULLP, FAPI_DL_TTI_REQUEST, 1, \
-           sizeof(fapi_dl_tti_req_t));
+               sizeof(fapi_dl_tti_req_t));
 
-        /* Fill message header */
-        LWR_MAC_ALLOC(headerElem, (sizeof(fapi_api_queue_elem_t) + sizeof(fapi_msg_header_t)));
-        if(!headerElem)
-        {
-           DU_LOG("\nERROR  -->  LWR_MAC: Memory allocation failed for header in DL TTI req");
-           LWR_MAC_FREE(dlTtiElem, (sizeof(fapi_api_queue_elem_t) + sizeof(fapi_dl_tti_req_t)));
-           return RFAILED;
-        }
-        FILL_FAPI_LIST_ELEM(headerElem, dlTtiElem, FAPI_VENDOR_MSG_HEADER_IND, 1, \
-              sizeof(fapi_msg_header_t));
-        msgHeader = (fapi_msg_header_t *)(headerElem + 1);
-        msgHeader->num_msg = 1;
-        msgHeader->handle = 0;
+         /* Fill message header */
+         LWR_MAC_ALLOC(headerElem, (sizeof(fapi_api_queue_elem_t) + sizeof(fapi_msg_header_t)));
+         if(!headerElem)
+         {
+            DU_LOG("\nERROR  -->  LWR_MAC: Memory allocation failed for header in DL TTI req");
+            LWR_MAC_FREE(dlTtiElem, (sizeof(fapi_api_queue_elem_t) + sizeof(fapi_dl_tti_req_t)));
+            return RFAILED;
+         }
+         FILL_FAPI_LIST_ELEM(headerElem, dlTtiElem, FAPI_VENDOR_MSG_HEADER_IND, 1, \
+               sizeof(fapi_msg_header_t));
+         msgHeader = (fapi_msg_header_t *)(headerElem + 1);
+         msgHeader->num_msg = 1;
+         msgHeader->handle = 0;
 
          /* Fill Dl TTI Request */
-        dlTtiReq = (fapi_dl_tti_req_t *)(dlTtiElem +1);
-        memset(dlTtiReq, 0, sizeof(fapi_dl_tti_req_t));
-        fillMsgHeader(&dlTtiReq->header, FAPI_DL_TTI_REQUEST, sizeof(fapi_dl_tti_req_t));
-
-        dlTtiReq->sfn  = dlTtiReqTimingInfo.sfn;
-        dlTtiReq->slot = dlTtiReqTimingInfo.slot;
-        dlTtiReq->nPdus = calcDlTtiReqPduCount(&currDlSlot->dlInfo);  /* get total Pdus */
-        nPdu = dlTtiReq->nPdus;
-        dlTtiReq->nGroup = 0;
-        if(dlTtiReq->nPdus > 0)
-        {
-           if(currDlSlot->dlInfo.isBroadcastPres)
-           {
-              if(currDlSlot->dlInfo.brdcstAlloc.ssbTrans)
-              {
-                 if(dlTtiReq->pdus != NULLP)
-                 {
-                    for(idx = 0; idx < currDlSlot->dlInfo.brdcstAlloc.ssbIdxSupported; idx++)
-                    {
-                       fillSsbPdu(&dlTtiReq->pdus[numPduEncoded], &macCellCfg,\
-                             currDlSlot, idx, dlTtiReq->sfn);
-                       numPduEncoded++;
-                    }
-                 }
-                 DU_LOG("\033[1;31m");
-                 DU_LOG("\nDEBUG  -->  LWR_MAC: MIB sent..");
-                 DU_LOG("\033[0m");
-              }
-              if(currDlSlot->dlInfo.brdcstAlloc.sib1Trans)
-              {
-                 /* Filling SIB1 param */
-                 if(numPduEncoded != nPdu)
-                 {
-                    rntiType = SI_RNTI_TYPE;
-                    fillPdcchPdu(&dlTtiReq->pdus[numPduEncoded],&currDlSlot->dlInfo,\
-                          rntiType, CORESET_TYPE0);
-                    numPduEncoded++;
-                    fillPdschPdu(&dlTtiReq->pdus[numPduEncoded],
-                          &currDlSlot->dlInfo.brdcstAlloc.sib1Alloc.sib1PdschCfg,
-                          currDlSlot->dlInfo.brdcstAlloc.sib1Alloc.bwp,
-                          pduIndex);
-                    pduIndex++;
-                    numPduEncoded++;
-                 }
-                 DU_LOG("\033[1;34m");
+         dlTtiReq = (fapi_dl_tti_req_t *)(dlTtiElem +1);
+         memset(dlTtiReq, 0, sizeof(fapi_dl_tti_req_t));
+         fillMsgHeader(&dlTtiReq->header, FAPI_DL_TTI_REQUEST, sizeof(fapi_dl_tti_req_t));
+
+         dlTtiReq->sfn  = dlTtiReqTimingInfo.sfn;
+         dlTtiReq->slot = dlTtiReqTimingInfo.slot;
+         dlTtiReq->nPdus = calcDlTtiReqPduCount(&currDlSlot->dlInfo);  /* get total Pdus */
+         nPdu = dlTtiReq->nPdus;
+         dlTtiReq->nGroup = 0;
+         if(dlTtiReq->nPdus > 0)
+         {
+            if(currDlSlot->dlInfo.isBroadcastPres)
+            {
+               if(currDlSlot->dlInfo.brdcstAlloc.ssbTrans)
+               {
+                  if(dlTtiReq->pdus != NULLP)
+                  {
+                     for(idx = 0; idx < currDlSlot->dlInfo.brdcstAlloc.ssbIdxSupported; idx++)
+                     {
+                        fillSsbPdu(&dlTtiReq->pdus[numPduEncoded], &macCellCfg,\
+                              currDlSlot, idx, dlTtiReq->sfn);
+                        numPduEncoded++;
+                     }
+                  }
+                  DU_LOG("\033[1;31m");
+                  DU_LOG("\nDEBUG  -->  LWR_MAC: MIB sent..");
+                  DU_LOG("\033[0m");
+               }
+               if(currDlSlot->dlInfo.brdcstAlloc.sib1Trans)
+               {
+                  /* Filling SIB1 param */
+                  if(numPduEncoded != nPdu)
+                  {
+                     rntiType = SI_RNTI_TYPE;
+                     fillPdcchPdu(&dlTtiReq->pdus[numPduEncoded],&currDlSlot->dlInfo,\
+                           rntiType, CORESET_TYPE0);
+                     numPduEncoded++;
+                     fillPdschPdu(&dlTtiReq->pdus[numPduEncoded],
+                           &currDlSlot->dlInfo.brdcstAlloc.sib1Alloc.sib1PdschCfg,
+                           currDlSlot->dlInfo.brdcstAlloc.sib1Alloc.bwp,
+                           pduIndex);
+                     dlTtiReq->ue_grp_info[dlTtiReq->nGroup].pduIdx[pduIndex] = pduIndex;
+                     pduIndex++;
+                     numPduEncoded++;
+                  }
+
+                  DU_LOG("\033[1;34m");
                   DU_LOG("\nDEBUG  -->  LWR_MAC: SIB1 sent...");
-                 DU_LOG("\033[0m");
-              }
-           }
-           if(currDlSlot->dlInfo.rarAlloc != NULLP)
-           {
-              /* Filling RAR param */
-              rntiType = RA_RNTI_TYPE;
-              fillPdcchPdu(&dlTtiReq->pdus[numPduEncoded], \
-                    &currDlSlot->dlInfo, rntiType, CORESET_TYPE0);
-              numPduEncoded++;
-              fillPdschPdu(&dlTtiReq->pdus[numPduEncoded],
-                    &currDlSlot->dlInfo.rarAlloc->rarPdschCfg,
-                    currDlSlot->dlInfo.rarAlloc->bwp,
-                    pduIndex);
-              numPduEncoded++;
-              pduIndex++;
-
-              DU_LOG("\033[1;32m");
-              DU_LOG("\nDEBUG  -->  LWR_MAC: RAR sent...");
-              DU_LOG("\033[0m");
-           }
-           if(currDlSlot->dlInfo.dlMsgAlloc != NULLP)
-           {
-              if(currDlSlot->dlInfo.dlMsgAlloc->dlMsgInfo.dlMsgPdu != NULLP)
-              {
-                 /* Filling Msg4 param */
-                 DU_LOG("\033[1;32m");
-                 if(currDlSlot->dlInfo.dlMsgAlloc->dlMsgInfo.isMsg4Pdu)
-                 {
-                    rntiType = TC_RNTI_TYPE;
-                    fillPdcchPdu(&dlTtiReq->pdus[numPduEncoded], \
-                          &currDlSlot->dlInfo, rntiType, CORESET_TYPE0);
-                    DU_LOG("\nDEBUG  -->  LWR_MAC: MSG4 sent...");
-                 }
-                 else
-                 { 
-                    /* Filling other DL msg params */
-                    rntiType = C_RNTI_TYPE;
-                    fillPdcchPdu(&dlTtiReq->pdus[numPduEncoded], \
-                          &currDlSlot->dlInfo, rntiType, CORESET_TYPE1);
-                    DU_LOG("\nDEBUG  -->  LWR_MAC: DL MSG sent...");
+                  DU_LOG("\033[0m");
+               }
+            }
+            if(currDlSlot->dlInfo.rarAlloc != NULLP)
+            {
+               /* Filling RAR param */
+               rntiType = RA_RNTI_TYPE;
+               fillPdcchPdu(&dlTtiReq->pdus[numPduEncoded], \
+                     &currDlSlot->dlInfo, rntiType, CORESET_TYPE0);
+               numPduEncoded++;
+               fillPdschPdu(&dlTtiReq->pdus[numPduEncoded],
+                     &currDlSlot->dlInfo.rarAlloc->rarPdschCfg,
+                     currDlSlot->dlInfo.rarAlloc->bwp,
+                     pduIndex);
+               numPduEncoded++;
+               pduIndex++;
+
+               DU_LOG("\033[1;32m");
+               DU_LOG("\nDEBUG  -->  LWR_MAC: RAR sent...");
+               DU_LOG("\033[0m");
+            }
+            if(currDlSlot->dlInfo.dlMsgAlloc != NULLP)
+            {
+               if(currDlSlot->dlInfo.dlMsgAlloc->dlMsgInfo.dlMsgPdu != NULLP)
+               {
+                  /* Filling Msg4 param */
+                  DU_LOG("\033[1;32m");
+                  if(currDlSlot->dlInfo.dlMsgAlloc->dlMsgInfo.isMsg4Pdu)
+                  {
+                     rntiType = TC_RNTI_TYPE;
+                     fillPdcchPdu(&dlTtiReq->pdus[numPduEncoded], \
+                           &currDlSlot->dlInfo, rntiType, CORESET_TYPE0);
+                     DU_LOG("\nDEBUG  -->  LWR_MAC: MSG4 sent...");
                   }
-                 DU_LOG("\033[0m");
-
-                 numPduEncoded++;
-                 fillPdschPdu(&dlTtiReq->pdus[numPduEncoded],
-                       &currDlSlot->dlInfo.dlMsgAlloc->dlMsgPdschCfg,
-                       currDlSlot->dlInfo.dlMsgAlloc->bwp,
-                       pduIndex);
-                 numPduEncoded++;
-                 pduIndex++;
-              }
+                  else
+                  { 
+                     /* Filling other DL msg params */
+                     rntiType = C_RNTI_TYPE;
+                     fillPdcchPdu(&dlTtiReq->pdus[numPduEncoded], \
+                           &currDlSlot->dlInfo, rntiType, CORESET_TYPE1);
+                     DU_LOG("\nDEBUG  -->  LWR_MAC: DL MSG sent...");
+                  }
+                  DU_LOG("\033[0m");
+
+                  numPduEncoded++;
+                  fillPdschPdu(&dlTtiReq->pdus[numPduEncoded],
+                        &currDlSlot->dlInfo.dlMsgAlloc->dlMsgPdschCfg,
+                        currDlSlot->dlInfo.dlMsgAlloc->bwp,
+                        pduIndex);
+                  numPduEncoded++;
+                  pduIndex++;
+               }
                else
-              {
+               {
                   MAC_FREE(currDlSlot->dlInfo.dlMsgAlloc, sizeof(DlMsgAlloc));
-                 currDlSlot->dlInfo.dlMsgAlloc = NULLP;
-              }
-           }
+                  currDlSlot->dlInfo.dlMsgAlloc = NULLP;
+               }
+            }
+
+            dlTtiReq->ue_grp_info[dlTtiReq->nGroup].nUe = MAX_NUM_UE_PER_TTI;
+            dlTtiReq->nGroup++;
 
 #ifdef ODU_SLOT_IND_DEBUG_LOG      
-           DU_LOG("\nDEBUG  -->  LWR_MAC: Sending DL TTI Request");
+            DU_LOG("\nDEBUG  -->  LWR_MAC: Sending DL TTI Request");
 #endif     
-           /* Intel L1 expects UL_TTI.request following DL_TTI.request */
-           msgHeader->num_msg++;
+
+            /* Intel L1 expects UL_TTI.request following DL_TTI.request */
             fillUlTtiReq(currTimingInfo, dlTtiElem);
-           /* send Tx-DATA req message */
-           msgHeader->num_msg++;
-           sendTxDataReq(dlTtiReqTimingInfo, &currDlSlot->dlInfo, dlTtiElem->p_next);
-            LwrMacSendToL1(headerElem);
-        }
-        else
-        {
+            msgHeader->num_msg++;
+
+            /* Intel L1 expects UL_DCI.request following DL_TTI.request */
+            fillUlDciReq(currTimingInfo, dlTtiElem->p_next);
+            msgHeader->num_msg++;
+
+            /* send Tx-DATA req message */
+            sendTxDataReq(dlTtiReqTimingInfo, &currDlSlot->dlInfo, dlTtiElem->p_next->p_next);
+            if(dlTtiElem->p_next->p_next->p_next)
+            {
+               msgHeader->num_msg++;
+               prevElem = dlTtiElem->p_next->p_next->p_next;
+            }
+            else
+               prevElem = dlTtiElem->p_next->p_next;
+         }
+         else
+         {
 #ifdef ODU_SLOT_IND_DEBUG_LOG      
-           DU_LOG("\nDEBUG  -->  LWR_MAC: Sending DL TTI Request");
+            DU_LOG("\nDEBUG  -->  LWR_MAC: Sending DL TTI Request");
 #endif     
 
-           /* Intel L1 expects UL_TTI.request following DL_TTI.request */
-           msgHeader->num_msg++;
-           fillUlTtiReq(currTimingInfo, dlTtiElem);
-            LwrMacSendToL1(headerElem);
-        }
-        memset(currDlSlot, 0, sizeof(MacDlSlot));
-        return ROK;
+            /* Intel L1 expects UL_TTI.request following DL_TTI.request */
+            fillUlTtiReq(currTimingInfo, dlTtiElem);
+            msgHeader->num_msg++;
+
+            /* Intel L1 expects UL_DCI.request following DL_TTI.request */
+            fillUlDciReq(currTimingInfo, dlTtiElem->p_next);
+            msgHeader->num_msg++;
+
+            prevElem = dlTtiElem->p_next->p_next;
+         }
+
+         if(macCb.macCell[cellIdx]->state == CELL_TO_BE_STOPPED)
+         {
+            /* Intel L1 expects UL_DCI.request following DL_TTI.request */
+            lwr_mac_procStopReqEvt(currTimingInfo, prevElem);
+            msgHeader->num_msg++;
+            macCb.macCell[cellIdx]->state = CELL_STOP_IN_PROGRESS;
+         }
+         LwrMacSendToL1(headerElem);
+         memset(currDlSlot, 0, sizeof(MacDlSlot));
+         return ROK;
       }
       else
       {
-        DU_LOG("\nERROR  -->  LWR_MAC: Failed to allocate memory for DL TTI Request");
-        memset(currDlSlot, 0, sizeof(MacDlSlot));
-        return RFAILED;
+         DU_LOG("\nERROR  -->  LWR_MAC: Failed to allocate memory for DL TTI Request");
+         memset(currDlSlot, 0, sizeof(MacDlSlot));
+         return RFAILED;
       }
    }
    else
@@ -4194,7 +4207,7 @@ uint8_t fillUlDciPdcchPdu(fapi_dci_pdu_t *ulDciReqPdu, DlSchedInfo *dlInfo, uint
  *         RFAILED - failure
  *
  ******************************************************************/
-uint16_t fillUlDciReq(SlotIndInfo currTimingInfo)
+uint16_t fillUlDciReq(SlotIndInfo currTimingInfo, p_fapi_api_queue_elem_t prevElem)
 {
 #ifdef INTEL_FAPI
    uint8_t      cellIdx =0;
@@ -4202,9 +4215,7 @@ uint16_t fillUlDciReq(SlotIndInfo currTimingInfo)
    SlotIndInfo  ulDciReqTimingInfo ={0};
    MacDlSlot    *currDlSlot = NULLP;
    fapi_ul_dci_req_t        *ulDciReq =NULLP;
-   fapi_msg_header_t        *msgHeader =NULLP;
    p_fapi_api_queue_elem_t  ulDciElem;
-   p_fapi_api_queue_elem_t  headerElem;
 
    if(lwrMacCb.phyState == PHY_STATE_RUNNING)
    {
@@ -4212,8 +4223,6 @@ uint16_t fillUlDciReq(SlotIndInfo currTimingInfo)
       memcpy(&ulDciReqTimingInfo, &currTimingInfo, sizeof(SlotIndInfo));
       currDlSlot = &macCb.macCell[cellIdx]->dlSlot[ulDciReqTimingInfo.slot % MAX_SLOTS];
 
-      if(currDlSlot->dlInfo.ulGrant != NULLP)
-      {
          LWR_MAC_ALLOC(ulDciElem, (sizeof(fapi_api_queue_elem_t) + sizeof(fapi_ul_dci_req_t)));
          if(ulDciElem)
         {
@@ -4225,6 +4234,8 @@ uint16_t fillUlDciReq(SlotIndInfo currTimingInfo)
 
             ulDciReq->sfn  = ulDciReqTimingInfo.sfn;
             ulDciReq->slot = ulDciReqTimingInfo.slot;
+          if(currDlSlot->dlInfo.ulGrant != NULLP)
+          {
             ulDciReq->numPdus = 1;  // No. of PDCCH PDUs
             if(ulDciReq->numPdus > 0)
             {
@@ -4234,32 +4245,12 @@ uint16_t fillUlDciReq(SlotIndInfo currTimingInfo)
               /* free UL GRANT at SCH */
               MAC_FREE(currDlSlot->dlInfo.ulGrant, sizeof(DciInfo));
               currDlSlot->dlInfo.ulGrant = NULLP;
-
-              /* Fill message header */
-              LWR_MAC_ALLOC(headerElem, (sizeof(fapi_api_queue_elem_t) + sizeof(fapi_msg_header_t)));
-              if(!headerElem)
-              {
-                 DU_LOG("\nERROR  -->  LWR_MAC: Memory allocation failed for UL DCI req header");
-                 LWR_MAC_FREE(ulDciElem, (sizeof(fapi_api_queue_elem_t) + sizeof(fapi_ul_dci_req_t)));
-                 return RFAILED;
-              }
-              FILL_FAPI_LIST_ELEM(headerElem, ulDciElem, FAPI_VENDOR_MSG_HEADER_IND, 1, \
-                 sizeof(fapi_msg_header_t));
-              msgHeader = (fapi_msg_header_t *)(headerElem + 1);
-              msgHeader->num_msg = 1;
-              msgHeader->handle = 0;
+            }
 #ifdef ODU_SLOT_IND_DEBUG_LOG
               DU_LOG("\nDEBUG  -->  LWR_MAC: Sending UL DCI Request");
 #endif
-              LwrMacSendToL1(headerElem);
-            }
         }
-         else
-         {
-            DU_LOG("\nERROR  -->  LWR_MAC: Failed to allocate memory for UL DCI Request");
-            memset(currDlSlot, 0, sizeof(MacDlSlot));
-            return RFAILED;
-         }
+               prevElem->p_next = ulDciElem;
       }
    }
    else
@@ -4306,7 +4297,7 @@ lwrMacFsmHdlr fapiEvtHdlr[MAX_STATE][MAX_EVENT] =
       lwr_mac_procConfigReqEvt,
       lwr_mac_procConfigRspEvt,
       lwr_mac_procInvalidEvt,
-      lwr_mac_procStopReqEvt,
+      lwr_mac_procInvalidEvt,
    }
 };