+#ifdef CALL_FLOW_DEBUG_LOG
+ DU_LOG("\nCall Flow: ENTMAC -> ENTSCH : EVENT_DL_RLC_BO_INFO_TO_SCH\n");
+#endif
+
+ DU_LOG("\nDEBUG --> SCH : Received RLC BO Status indication");
+ cell = schCb[inst].cells[inst];
+
+ if(cell == NULLP)
+ {
+ DU_LOG("\nERROR --> SCH : MacSchDlRlcBoInfo(): Cell does not exists");
+ return RFAILED;
+ }
+
+ GET_UE_IDX(dlBoInfo->crnti, ueIdx);
+ ueCb = &cell->ueCb[ueIdx-1];
+ lcId = dlBoInfo->lcId;
+
+ if(lcId == SRB1_LCID || lcId == SRB2_LCID || lcId == SRB3_LCID || \
+ (lcId >= MIN_DRB_LCID && lcId <= MAX_DRB_LCID))
+ {
+ SET_ONE_BIT(ueIdx, cell->boIndBitMap);
+ ueCb->dlInfo.dlLcCtxt[lcId].bo = dlBoInfo->dataVolume;
+ }
+ else if(lcId != SRB0_LCID)
+ {
+ DU_LOG("\nERROR --> SCH : Invalid LC Id %d in MacSchDlRlcBoInfo", lcId);
+ return RFAILED;
+ }
+
+ slot = (cell->slotInfo.slot + SCHED_DELTA + PHY_DELTA_DL + BO_DELTA) % cell->numSlots;
+#ifdef NR_TDD
+ while(schGetSlotSymbFrmt(cell->slotFrmtBitMap, slot) != DL_SLOT)
+ {
+ slot = (slot + 1)%cell->numSlots;
+ slotIdx++;
+ if(slotIdx==cell->numSlots)
+ {
+ DU_LOG("\nERROR --> SCH : No DL Slot available");
+ return RFAILED;
+ }
+ }
+#endif
+
+ schDlSlotInfo = cell->schDlSlotInfo[slot];
+
+ if(schDlSlotInfo == NULLP)
+ {
+ DU_LOG("\nERROR --> SCH : MacSchDlRlcBoInfo(): schDlSlotInfo does not exists");
+ return RFAILED;
+ }
+ SCH_ALLOC(schDlSlotInfo->dlMsgInfo, sizeof(DlMsgInfo));
+ if(schDlSlotInfo->dlMsgInfo == NULLP)
+ {
+ DU_LOG("\nERROR --> SCH : Memory allocation failed for dlMsgInfo");
+ schDlSlotInfo = NULL;
+ return RFAILED;
+ }
+
+ schDlSlotInfo->dlMsgInfo->crnti = dlBoInfo->crnti;
+ schDlSlotInfo->dlMsgInfo->ndi = 1;
+ schDlSlotInfo->dlMsgInfo->harqProcNum = 0;
+ schDlSlotInfo->dlMsgInfo->dlAssignIdx = 0;
+ schDlSlotInfo->dlMsgInfo->pucchTpc = 0;
+ schDlSlotInfo->dlMsgInfo->pucchResInd = 0;
+ schDlSlotInfo->dlMsgInfo->harqFeedbackInd = 0;
+ schDlSlotInfo->dlMsgInfo->dciFormatId = 1;
+ if(lcId == SRB0_LCID)
+ {
+ schDlSlotInfo->dlMsgInfo->isMsg4Pdu = true;
+ schDlSlotInfo->dlMsgInfo->dlMsgPduLen = dlBoInfo->dataVolume;
+ }
+ return ROK;
+}
+
+/*******************************************************************
+ *
+ * @brief Processes BSR indiation from MAC
+ *
+ * @details
+ *
+ * Function : MacSchBsr
+ *
+ * Functionality:
+ * Processes DL BSR from MAC
+ *
+ * @params[in] Pst pst
+ * UlBufferStatusRptInd bsrInd
+ * @return ROK - success
+ * RFAILED - failure
+ *
+ * ****************************************************************/
+uint8_t MacSchBsr(Pst *pst, UlBufferStatusRptInd *bsrInd)
+{
+ Inst schInst = pst->dstInst-SCH_INST_START;
+ SchCellCb *cellCb = NULLP;
+ SchUeCb *ueCb = NULLP;
+ uint8_t lcgIdx;
+
+#ifdef CALL_FLOW_DEBUG_LOG
+ DU_LOG("\nCall Flow: ENTMAC -> ENTSCH : EVENT_SHORT_BSR\n");
+#endif
+
+ DU_LOG("\nDEBUG --> SCH : Received BSR");
+ cellCb = schCb[schInst].cells[schInst];
+ ueCb = schGetUeCb(cellCb, bsrInd->crnti);
+
+ /* store dataVolume per lcg in uecb */
+ for(lcgIdx = 0; lcgIdx < bsrInd->numLcg; lcgIdx++)
+ {
+ ueCb->bsrInfo[lcgIdx].priority = 1; //TODO: determining LCG priority?
+ ueCb->bsrInfo[lcgIdx].dataVol = bsrInd->dataVolInfo[lcgIdx].dataVol;
+ }
+ return ROK;
+}
+
+/*******************************************************************
+ *
+ * @brief Processes SR UCI indication from MAC
+ *
+ * @details
+ *
+ * Function : MacSchSrUciInd
+ *
+ * Functionality:
+ * Processes SR UCI indication from MAC
+ *
+ * @params[in] Post structure
+ * UCI Indication
+ * @return ROK - success
+ * RFAILED - failure
+ *
+ * ****************************************************************/
+uint8_t MacSchSrUciInd(Pst *pst, SrUciIndInfo *uciInd)
+{
+ Inst inst = pst->dstInst-SCH_INST_START;
+
+ SchUeCb *ueCb;
+ SchCellCb *cellCb = schCb[inst].cells[inst];
+
+#ifdef CALL_FLOW_DEBUG_LOG
+ DU_LOG("\nCall Flow: ENTMAC -> ENTSCH : EVENT_UCI_IND_TO_SCH\n");
+#endif
+
+ DU_LOG("\nDEBUG --> SCH : Received SR");
+
+ ueCb = schGetUeCb(cellCb, uciInd->crnti);
+
+ if(uciInd->numSrBits)
+ {
+ ueCb->srRcvd = true;
+ }
+ return ROK;
+}
+
+/*******************************************************************
+ *
+ * @brief Allocates requested PRBs for DL
+ *
+ * @details
+ *
+ * Function : allocatePrbDl
+ *
+ * Functionality:
+ * Allocates requested PRBs in DL
+ * Keeps track of allocated PRB (using bitmap) and remaining PRBs
+ *
+ * @params[in] prbAlloc table
+ * Start symbol
+ * Number of symbols
+ * Start PRB
+ * Number of PRBs
+ *
+ * @return ROK - success
+ * RFAILED - failure
+ *
+ * ****************************************************************/
+uint8_t allocatePrbDl(SchCellCb *cell, SlotTimingInfo slotTime, \
+ uint8_t startSymbol, uint8_t symbolLength, uint16_t *startPrb, uint16_t numPrb)
+{
+ uint8_t symbol = 0;
+ uint16_t broadcastPrbStart=0, broadcastPrbEnd=0;
+ FreePrbBlock *freePrbBlock = NULLP;
+ CmLList *freePrbNode = NULLP;
+ PduTxOccsaion ssbOccasion=0, sib1Occasion=0;
+ SchDlSlotInfo *schDlSlotInfo = cell->schDlSlotInfo[slotTime.slot];
+ SchPrbAlloc *prbAlloc = &schDlSlotInfo->prbAlloc;
+
+ /* If startPrb is set to MAX_NUM_RB, it means startPrb is not known currently.
+ * Search for an appropriate location in PRB grid and allocate requested resources */
+ if(*startPrb == MAX_NUM_RB)
+ {
+ /* Check if SSB/SIB1 is also scheduled in this slot */
+ ssbOccasion = schCheckSsbOcc(cell, slotTime);
+ sib1Occasion = schCheckSib1Occ(cell, slotTime);
+
+ if(ssbOccasion && sib1Occasion)
+ {
+ broadcastPrbStart = cell->cellCfg.ssbSchCfg.ssbOffsetPointA;
+ broadcastPrbEnd = broadcastPrbStart + SCH_SSB_NUM_PRB + cell->cellCfg.sib1SchCfg.sib1PdschCfg.pdschFreqAlloc.freqAlloc.numPrb -1;
+ }
+ else if(ssbOccasion)
+ {
+ broadcastPrbStart = cell->cellCfg.ssbSchCfg.ssbOffsetPointA;
+ broadcastPrbEnd = broadcastPrbStart + SCH_SSB_NUM_PRB -1;
+ }
+ else if(sib1Occasion)
+ {
+ broadcastPrbStart = cell->cellCfg.sib1SchCfg.sib1PdschCfg.pdschFreqAlloc.freqAlloc.startPrb;
+ broadcastPrbEnd = broadcastPrbStart + cell->cellCfg.sib1SchCfg.sib1PdschCfg.pdschFreqAlloc.freqAlloc.numPrb -1;
+ }
+
+ /* Iterate through all free PRB blocks */
+ freePrbNode = prbAlloc->freePrbBlockList.first;
+ while(freePrbNode)
+ {
+ freePrbBlock = (FreePrbBlock *)freePrbNode->node;
+
+ /* If broadcast message is scheduled in this slot, then check if its PRBs belong to the current free block.
+ * Since SSB/SIB1 PRB location is fixed, these PRBs cannot be allocated to other message in same slot */
+ if((ssbOccasion || sib1Occasion) &&
+ ((broadcastPrbStart >= freePrbBlock->startPrb) && (broadcastPrbStart <= freePrbBlock->endPrb)) && \
+ ((broadcastPrbEnd >= freePrbBlock->startPrb) && (broadcastPrbEnd <= freePrbBlock->endPrb)))
+ {
+ /* Implmentation is done such that highest-numbered free-RB is allocated first */
+ if((freePrbBlock->endPrb > broadcastPrbEnd) && ((freePrbBlock->endPrb - broadcastPrbEnd) >= numPrb))
+ {
+ /* If sufficient free PRBs are available above bradcast message then,
+ * endPrb = freePrbBlock->endPrb
+ * startPrb = endPrb - numPrb +1;
+ */
+ *startPrb = freePrbBlock->endPrb - numPrb +1;
+ break;
+ }
+ else if((broadcastPrbStart > freePrbBlock->startPrb) && ((broadcastPrbStart - freePrbBlock->startPrb) >= numPrb))
+ {
+ /* If free PRBs are available below broadcast message then,
+ * endPrb = broadcastPrbStart - 1
+ * startPrb = endPrb - numPrb +1
+ */
+ *startPrb = broadcastPrbStart - numPrb;
+ break;
+ }
+ else
+ {
+ freePrbNode = freePrbNode->next;
+ continue;
+ }
+ }
+ else
+ {
+ /* Check if requested number of blocks can be allocated from the current block */
+ if (freePrbBlock->numFreePrb < numPrb)
+ {
+ freePrbNode = freePrbNode->next;
+ continue;
+ }
+ *startPrb = freePrbBlock->endPrb - numPrb +1;
+ break;
+ }
+ }
+
+ /* If no free block can be used to allocated request number of RBs */
+ if(*startPrb == MAX_NUM_RB)
+ return RFAILED;
+ }
+
+ /* If startPrb is known already, check if requested PRBs are available for allocation */
+ else
+ {
+ freePrbNode = isPrbAvailable(&prbAlloc->freePrbBlockList, *startPrb, numPrb);
+ if(!freePrbNode)
+ {
+ DU_LOG("\nERROR --> SCH: Requested PRB unavailable");
+ return RFAILED;
+ }
+ }
+
+ /* Update bitmap to allocate PRBs */
+ for(symbol=startSymbol; symbol < (startSymbol+symbolLength); symbol++)
+ {
+ if(fillPrbBitmap(prbAlloc->prbBitMap[symbol], *startPrb, numPrb) != ROK)
+ {
+ DU_LOG("\nERROR --> SCH: fillPrbBitmap() failed for symbol [%d] ", symbol);
+ return RFAILED;
+ }
+ }
+
+ /* Update the remaining number for free PRBs */
+ removeAllocatedPrbFromFreePrbList(&prbAlloc->freePrbBlockList, freePrbNode, *startPrb, numPrb);