+/*******************************************************************
+ *
+ * @brief Handles sending UL scheduler info to MAC
+ *
+ * @details
+ *
+ * Function : sendUlSchInfoToMac
+ *
+ * Functionality:
+ * Sends UL Sch info to MAC from SCH
+ *
+ * @params[in]
+ * @return ROK - success
+ * RFAILED - failure
+ *
+ * ****************************************************************/
+int sendUlSchInfoToMac(UlSchedInfo *ulSchedInfo, Inst inst)
+{
+ Pst pst;
+
+ memset(&pst, 0, sizeof(Pst));
+ SCH_FILL_RSP_PST(pst, inst);
+ pst.event = EVENT_UL_SCH_INFO;
+
+ return(*schMacUlSchInfoOpts[pst.selector])(&pst, ulSchedInfo);
+}
+/**
+ * @brief resource allocation for PRACH
+ *
+ * @details
+ *
+ * Function : schPrachResAlloc
+ *
+ * This function handles PRACH allocation
+ *
+ * @param[in] SchCellCb *cell, cell cb
+ * @param[in] UlSchedInfo *ulSchedInfo, UL scheduling info
+ * @return void
+ **/
+void schPrachResAlloc(SchCellCb *cell, UlSchedInfo *ulSchedInfo, SlotIndInfo prachOccasionTimingInfo)
+{
+ uint8_t puschScs;
+ uint8_t numPrachRb = 0;
+ uint8_t numRa = 0;
+ uint8_t freqStart = 0;
+ uint8_t prachCfgIdx = 0;
+ uint8_t prachFormat = 0;
+ uint8_t x = 0;
+ uint8_t y = 0;
+ uint16_t prachSubframe = 0;
+ uint8_t prachStartSymbol = 0;
+ uint8_t prachOcas = 0;
+ uint8_t dataType = 0;
+ uint8_t idx = 0;
+ SchUlSlotInfo *schUlSlotInfo = NULLP;
+
+ puschScs = cell->cellCfg.schInitialUlBwp.bwp.scs;
+ schUlSlotInfo = cell->schUlSlotInfo[prachOccasionTimingInfo.slot];
+ prachCfgIdx = cell->cellCfg.schRachCfg.prachCfgIdx;
+
+ /* derive the prachCfgIdx table paramters */
+ x = prachCfgIdxTable[prachCfgIdx][1];
+ y = prachCfgIdxTable[prachCfgIdx][2];
+ prachSubframe = prachCfgIdxTable[prachCfgIdx][3];
+
+ if((prachOccasionTimingInfo.sfn%x) == y)
+ {
+ /* check for subFrame number */
+ if ((1 << prachOccasionTimingInfo.slot) & prachSubframe)
+ {
+ /* prach ocassion present in this subframe */
+
+ prachFormat = prachCfgIdxTable[prachCfgIdx][0];
+ prachStartSymbol = prachCfgIdxTable[prachCfgIdx][4];
+ prachOcas = prachCfgIdxTable[prachCfgIdx][6];
+
+ /* freq domain resource determination for RACH*/
+ freqStart = cell->cellCfg.schRachCfg.msg1FreqStart;
+ /* numRa determined as 𝑛 belonging {0,1,.., M − 1},
+ * where M is given by msg1Fdm */
+ numRa = (cell->cellCfg.schRachCfg.msg1Fdm - 1);
+ for(idx=0; idx<MAX_RACH_NUM_RB_IDX; idx++)
+ {
+ if(numRbForPrachTable[idx][0] == cell->cellCfg.schRachCfg.rootSeqLen)
+ {
+ if(numRbForPrachTable[idx][1] == cell->cellCfg.schRachCfg.prachSubcSpacing)
+ {
+ if(numRbForPrachTable[idx][2] == puschScs)
+ {
+ break;
+ }
+ }
+ }
+ }
+ numPrachRb = numRbForPrachTable[idx][3];
+ dataType |= SCH_DATATYPE_PRACH;
+ /* Considering first slot in the frame for PRACH */
+ idx = 0;
+ schUlSlotInfo->assignedPrb[idx] = freqStart+numPrachRb;
+ }
+ ulSchedInfo->dataType = dataType;
+ /* prach info */
+ ulSchedInfo->prachSchInfo.numPrachOcas = prachOcas;
+ ulSchedInfo->prachSchInfo.prachFormat = prachFormat;
+ ulSchedInfo->prachSchInfo.numRa = numRa;
+ ulSchedInfo->prachSchInfo.prachStartSymb = prachStartSymbol;
+ }
+}
+
+uint16_t fillPucchResourceInfo(SchPucchInfo *schPucchInfo, Inst inst)
+{
+ /* derive pucchResourceSet from schCellCfg */
+ SchCellCb *cell = schCb[inst].cells[inst];
+ SchPucchCfgCmn *pucchCfg = &cell->cellCfg.schInitialUlBwp.pucchCommon;
+ uint8_t pucchIdx = pucchCfg->pucchResourceCommon;
+ SchBwpParams *ulBwp = &cell->cellCfg.schInitialUlBwp.bwp;
+
+ schPucchInfo->fdAlloc.startPrb = ulBwp->freqAlloc.startPrb + pucchResourceSet[pucchIdx][3];
+ schPucchInfo->fdAlloc.numPrb = PUCCH_NUM_PRB_FORMAT_0;
+ schPucchInfo->tdAlloc.startSymb = pucchResourceSet[pucchIdx][1];
+ schPucchInfo->tdAlloc.numSymb = pucchResourceSet[pucchIdx][2];
+ schPucchInfo->pucchFormat = pucchResourceSet[pucchIdx][0];
+
+ /* set HARQ flag to true */
+ schPucchInfo->harqFlag = true;
+ schPucchInfo->numHarqBits = 1; /* 1 bit for HARQ */
+
+ /* set SR and UCI flag to false */
+ schPucchInfo->srFlag = false;
+ schPucchInfo->uciFlag = false;
+
+ return ROK;
+}
+
+/**
+ * @brief resource allocation for UL
+ *
+ * @details
+ *
+ * Function : schUlResAlloc
+ *
+ * This function handles UL Resource allocation
+ *
+ * @param[in] SchCellCb *cell, cellCb
+ * @return void
+ **/
+uint8_t schUlResAlloc(SchCellCb *cell, Inst schInst)
+{
+ int ret = ROK;
+ UlSchedInfo ulSchedInfo;
+ SchUlSlotInfo *schUlSlotInfo = NULLP;
+ SlotIndInfo ulTimingInfo;
+ memset(&ulSchedInfo, 0, sizeof(UlSchedInfo));
+
+ /* add PHY delta */
+ ADD_DELTA_TO_TIME(cell->slotInfo,ulTimingInfo,PHY_DELTA+SCHED_DELTA);
+
+ ulSchedInfo.cellId = cell->cellId;
+ ulSchedInfo.slotIndInfo.sfn = ulTimingInfo.sfn;
+ ulSchedInfo.slotIndInfo.slot = ulTimingInfo.slot;
+
+ /* Schedule resources for PRACH */
+ schPrachResAlloc(cell, &ulSchedInfo, ulTimingInfo);
+
+ schUlSlotInfo = cell->schUlSlotInfo[ulTimingInfo.slot];
+ if(schUlSlotInfo->schPuschInfo)
+ {
+ ulSchedInfo.crnti = cell->raCb[0].tcrnti;
+ ulSchedInfo.dataType |= SCH_DATATYPE_PUSCH;
+ memcpy(&ulSchedInfo.schPuschInfo, schUlSlotInfo->schPuschInfo,
+ sizeof(SchPuschInfo));
+ SCH_FREE(schUlSlotInfo->schPuschInfo, sizeof(SchPuschInfo));
+ schUlSlotInfo->schPuschInfo = NULL;
+ }
+
+ if(schUlSlotInfo->pucchPres)
+ {
+ ulSchedInfo.dataType |= SCH_DATATYPE_UCI;
+ fillPucchResourceInfo(&schUlSlotInfo->schPucchInfo, schInst);
+ memcpy(&ulSchedInfo.schPucchInfo, &schUlSlotInfo->schPucchInfo,
+ sizeof(SchPucchInfo));
+ memset(&schUlSlotInfo->schPucchInfo, 0, sizeof(SchPucchInfo));
+ }
+
+ //send msg to MAC
+ ret = sendUlSchInfoToMac(&ulSchedInfo, schInst);
+ if(ret != ROK)
+ {
+ DU_LOG("\nSending UL Sch info from SCH to MAC failed");
+ }
+ memset(cell->schUlSlotInfo[ulTimingInfo.slot], 0, sizeof(SchUlSlotInfo));
+
+ return ret;
+}
+
+/*******************************************************************
+ *
+ * @brief Fills pdcch and pdsch info for msg4
+ *
+ * @details
+ *
+ * Function : schDlRsrcAllocMsg4
+ *
+ * Functionality:
+ * Fills pdcch and pdsch info for msg4
+ *
+ * @params[in]
+ * @return ROK - success
+ * RFAILED - failure
+ *
+ * ****************************************************************/
+uint8_t schDlRsrcAllocMsg4(Msg4Alloc *msg4Alloc, SchCellCb *cell, uint16_t slot)
+{
+ uint8_t coreset0Idx = 0;
+ uint8_t numRbs = 0;
+ uint8_t firstSymbol = 0;
+ uint8_t numSymbols = 0;
+ uint8_t offset = 0;
+ uint8_t offsetPointA;
+ uint8_t FreqDomainResource[6] = {0};
+ uint16_t tbSize = 0;
+ uint8_t numPdschSymbols = 12; /* considering pdsch region from 2 to 13 */
+ uint8_t mcs = 4; /* MCS fixed to 4 */
+ SchBwpDlCfg *initialBwp;
+
+ PdcchCfg *pdcch = &msg4Alloc->msg4PdcchCfg;
+ PdschCfg *pdsch = &msg4Alloc->msg4PdschCfg;
+ BwpCfg *bwp = &msg4Alloc->bwp;
+
+ initialBwp = &cell->cellCfg.schInitialDlBwp;
+ offsetPointA = cell->cellCfg.ssbSchCfg.ssbOffsetPointA;
+ coreset0Idx = initialBwp->pdcchCommon.commonSearchSpace.coresetId;
+
+ /* derive the sib1 coreset0 params from table 13-1 spec 38.213 */
+ numRbs = coresetIdxTable[coreset0Idx][1];
+ numSymbols = coresetIdxTable[coreset0Idx][2];
+ offset = coresetIdxTable[coreset0Idx][3];
+
+ /* calculate time domain parameters */
+ uint16_t mask = 0x2000;
+ for(firstSymbol=0; firstSymbol<14;firstSymbol++)
+ {
+ if(initialBwp->pdcchCommon.commonSearchSpace.monitoringSymbol & mask)
+ break;
+ else
+ mask = mask>>1;
+ }
+
+ /* calculate the PRBs */
+ schAllocFreqDomRscType0(((offsetPointA-offset)/6), (numRbs/6), FreqDomainResource);
+
+ /* fill BWP */
+ bwp->freqAlloc.numPrb = initialBwp->bwp.freqAlloc.numPrb;
+ bwp->freqAlloc.startPrb = initialBwp->bwp.freqAlloc.startPrb;
+ bwp->subcarrierSpacing = initialBwp->bwp.scs;
+ bwp->cyclicPrefix = initialBwp->bwp.cyclicPrefix;
+
+ /* fill the PDCCH PDU */
+ pdcch->coreset0Cfg.startSymbolIndex = firstSymbol;
+ pdcch->coreset0Cfg.durationSymbols = numSymbols;
+ memcpy(pdcch->coreset0Cfg.freqDomainResource,FreqDomainResource,6);
+ pdcch->coreset0Cfg.cceRegMappingType = 1; /* coreset0 is always interleaved */
+ pdcch->coreset0Cfg.regBundleSize = 6; /* spec-38.211 sec 7.3.2.2 */
+ pdcch->coreset0Cfg.interleaverSize = 2; /* spec-38.211 sec 7.3.2.2 */
+ pdcch->coreset0Cfg.coreSetType = 0;
+ pdcch->coreset0Cfg.coreSet0Size = numRbs;
+ pdcch->coreset0Cfg.shiftIndex = cell->cellCfg.phyCellId;
+ pdcch->coreset0Cfg.precoderGranularity = 0; /* sameAsRegBundle */
+ pdcch->numDlDci = 1;
+ pdcch->dci.rnti = cell->schDlSlotInfo[slot]->msg4Info->crnti;
+ pdcch->dci.scramblingId = cell->cellCfg.phyCellId;
+ pdcch->dci.scramblingRnti = 0;
+ pdcch->dci.cceIndex = 4; /* considering SIB1 is sent at cce 0-1-2-3 */
+ pdcch->dci.aggregLevel = 4;
+ pdcch->dci.beamPdcchInfo.numPrgs = 1;
+ pdcch->dci.beamPdcchInfo.prgSize = 1;
+ pdcch->dci.beamPdcchInfo.digBfInterfaces = 0;
+ pdcch->dci.beamPdcchInfo.prg[0].pmIdx = 0;
+ pdcch->dci.beamPdcchInfo.prg[0].beamIdx[0] = 0;
+ pdcch->dci.txPdcchPower.powerValue = 0;
+ pdcch->dci.txPdcchPower.powerControlOffsetSS = 0;
+
+ /* fill the PDSCH PDU */
+ uint8_t cwCount = 0;
+ pdsch->pduBitmap = 0; /* PTRS and CBG params are excluded */
+ pdsch->rnti = cell->schDlSlotInfo[slot]->msg4Info->crnti;
+ pdsch->pduIndex = 0;
+ pdsch->numCodewords = 1;
+ for(cwCount = 0; cwCount < pdsch->numCodewords; cwCount++)
+ {
+ pdsch->codeword[cwCount].targetCodeRate = 308;
+ pdsch->codeword[cwCount].qamModOrder = 2;
+ pdsch->codeword[cwCount].mcsIndex = mcs; /* mcs configured to 4 */
+ pdsch->codeword[cwCount].mcsTable = 0; /* notqam256 */
+ pdsch->codeword[cwCount].rvIndex = 0;
+ /* 38.214: Table 5.1.3.2-1, divided by 8 to get the value in bytes */
+ /* TODO : Calculate tbSize based of DL CCCH msg size */
+ tbSize = schCalcTbSize(2664/8); /* send this value to the func in bytes when considering msg4 size */
+ pdsch->codeword[cwCount].tbSize = tbSize;
+ }
+ pdsch->dataScramblingId = cell->cellCfg.phyCellId;
+ pdsch->numLayers = 1;
+ pdsch->transmissionScheme = 0;
+ pdsch->refPoint = 0;
+ pdsch->dmrs.dlDmrsSymbPos = 2;
+ pdsch->dmrs.dmrsConfigType = 0; /* type-1 */
+ pdsch->dmrs.dlDmrsScramblingId = cell->cellCfg.phyCellId;
+ pdsch->dmrs.scid = 0;
+ pdsch->dmrs.numDmrsCdmGrpsNoData = 1;
+ pdsch->dmrs.dmrsPorts = 0;
+ pdsch->pdschFreqAlloc.resourceAllocType = 1; /* RAT type-1 RIV format */
+ /* the RB numbering starts from coreset0, and PDSCH is always above SSB */
+ pdsch->pdschFreqAlloc.freqAlloc.startPrb = offset + SCH_SSB_NUM_PRB;
+ pdsch->pdschFreqAlloc.freqAlloc.numPrb = schCalcNumPrb(tbSize,mcs,numPdschSymbols);
+ pdsch->pdschFreqAlloc.vrbPrbMapping = 0; /* non-interleaved */
+ pdsch->pdschTimeAlloc.timeAlloc.startSymb = 2; /* spec-38.214, Table 5.1.2.1-1 */
+ pdsch->pdschTimeAlloc.timeAlloc.numSymb = 12;
+ pdsch->beamPdschInfo.numPrgs = 1;
+ pdsch->beamPdschInfo.prgSize = 1;
+ pdsch->beamPdschInfo.digBfInterfaces = 0;
+ pdsch->beamPdschInfo.prg[0].pmIdx = 0;
+ pdsch->beamPdschInfo.prg[0].beamIdx[0] = 0;
+ pdsch->txPdschPower.powerControlOffset = 0;
+ pdsch->txPdschPower.powerControlOffsetSS = 0;
+
+ pdcch->dci.pdschCfg = pdsch;
+ return ROK;
+}
+
+uint16_t schAllocPucchResource(SchCellCb *cell,uint16_t crnti, uint16_t slot)
+{
+ uint8_t k1 = 1; /* dl-DataToUL-ACK RRC parameter will received from DU-APP msg4-pucch config */
+ uint16_t pucchSlot = (slot + k1) % SCH_NUM_SLOTS;
+ SchUlSlotInfo *schUlSlotInfo = NULLP;
+
+ schUlSlotInfo = cell->schUlSlotInfo[pucchSlot];
+ memset(&schUlSlotInfo->schPucchInfo, 0, sizeof(SchPucchInfo));
+
+ schUlSlotInfo->pucchPres = true;
+ schUlSlotInfo->schPucchInfo.rnti = crnti;
+
+ return ROK;
+}