+
+/*******************************************************************
+ *
+ * @brief Handler to calculate TBS size for BSR requested
+ *
+ * @details
+ *
+ * Function : schCalculateUlTbs
+ *
+ * Functionality: Function will note the required TBS for each LCGIDX and use
+ * the Priority LCG List and RRM policy to allocate the TBS size
+ *
+ * @params [in] ueCb (Pointer to UE CB)
+ * [in] puschTime (Time slot where PUSCH will be sent)
+ * [in] symbLen (No of Symbols used for PUSCH transmission)
+ * [out] startPrb(Pointer to startPRB which will be calculated while
+ * finding the best Free Block)
+ * [out] totTBS(Pointer to total TBS size)
+ *
+ * @return bool : true > Scheduling of UL grant is successful
+ * false > vice versa
+ *
+ * ****************************************************************/
+bool schCalculateUlTbs(SchUeCb *ueCb, SlotTimingInfo puschTime, uint8_t symbLen,\
+ uint16_t *startPrb, uint32_t *totTBS)
+{
+ uint16_t mcsIdx = 0;
+ CmLListCp *lcLL = NULLP;
+ uint16_t lcgIdx = 0, lcId =0, maxFreePRB = 0;
+
+ *startPrb = 0;
+ *totTBS = 0;
+
+ /* check for BSR */
+ for(lcgIdx=0; lcgIdx<MAX_NUM_LOGICAL_CHANNEL_GROUPS; lcgIdx++)
+ {
+ if(ueCb->bsrInfo[lcgIdx].dataVol == 0)
+ {
+ continue;
+ }
+
+ /*TODO: lcgIdx and LCID has been implemented as one to one mapping.
+ * Need to check the mapping to figure out the LCID and lcgIdx once L2
+ * spec specifies any logic*/
+ lcId = lcgIdx;
+ if(ueCb->ulInfo.ulLcCtxt[lcId].isDedicated)
+ {
+ lcLL = &(ueCb->ulLcPrbEst.dedLcInfo->dedLcList);
+ }
+ else
+ {
+ lcLL = &(ueCb->ulLcPrbEst.defLcList);
+ }
+
+ /*[Step2]: Update the reqPRB and Payloadsize for this LC in the appropriate List*/
+ if(updateLcListReqPRB(lcLL, lcId, ueCb->bsrInfo[lcgIdx].dataVol) != ROK)
+ {
+ DU_LOG("\nERROR --> SCH: LcgId:%d updation failed",lcId);
+ return false;
+ }
+ }
+
+ if ((ueCb->ulLcPrbEst.defLcList.count == 0) && \
+ ((ueCb->ulLcPrbEst.dedLcInfo == NULL) || (ueCb->ulLcPrbEst.dedLcInfo->dedLcList.count == 0)))
+ {
+ if(ueCb->srRcvd)
+ {
+ *startPrb = MAX_NUM_RB;
+ *totTBS = schCalcTbSize(UL_GRANT_SIZE);
+ }
+
+ /*Returning true when NO Grant is there for UE as this is not scheduling
+ * error*/
+ return (true);
+ }
+
+ maxFreePRB = searchLargestFreeBlock(ueCb->cellCb, puschTime, startPrb, DIR_UL);
+
+ /*[Step4]: Estimation of PRB and BO which can be allocated to each LC in
+ * the list based on RRM policy*/
+
+ /*Either this UE contains no reservedPRB pool fir dedicated S-NSSAI or
+ * Num of Free PRB available is not enough to reserve Dedicated PRBs*/
+ if(maxFreePRB != 0)
+ {
+ mcsIdx = ueCb->ueCfg.ulModInfo.mcsIndex;
+ if((ueCb->ulLcPrbEst.dedLcInfo == NULLP)
+ || ((maxFreePRB < ueCb->ulLcPrbEst.dedLcInfo->rsvdDedicatedPRB)))
+ {
+ ueCb->ulLcPrbEst.sharedNumPrb = maxFreePRB;
+ DU_LOG("\nDEBUG --> SCH : UL Only Default Slice is scheduled, sharedPRB Count:%d",\
+ ueCb->ulLcPrbEst.sharedNumPrb);
+
+ /*PRB Alloc for Default LCs*/
+ prbAllocUsingRRMPolicy(&(ueCb->ulLcPrbEst.defLcList), FALSE, mcsIdx, symbLen,\
+ &(ueCb->ulLcPrbEst.sharedNumPrb), NULLP, NULLP,&(ueCb->srRcvd));
+ }
+ else
+ {
+ ueCb->ulLcPrbEst.sharedNumPrb = maxFreePRB - ueCb->ulLcPrbEst.dedLcInfo->rsvdDedicatedPRB;
+
+ /*PRB Alloc for Dedicated LCs*/
+ prbAllocUsingRRMPolicy(&(ueCb->ulLcPrbEst.dedLcInfo->dedLcList), TRUE, mcsIdx, symbLen,\
+ &(ueCb->ulLcPrbEst.sharedNumPrb), &(ueCb->ulLcPrbEst.dedLcInfo->rsvdDedicatedPRB),\
+ NULLP,&(ueCb->srRcvd));
+
+ /*PRB Alloc for Default LCs*/
+ prbAllocUsingRRMPolicy(&(ueCb->ulLcPrbEst.defLcList), FALSE, mcsIdx, symbLen, \
+ &(ueCb->ulLcPrbEst.sharedNumPrb), &(ueCb->ulLcPrbEst.dedLcInfo->rsvdDedicatedPRB),\
+ NULLP,&(ueCb->srRcvd));
+ }
+ }
+ /*[Step5]:Traverse each LCID in LcList to calculate the exact Scheduled Bytes
+ * using allocated BO per LC and Update dlMsgAlloc(BO report for MAC*/
+ if(ueCb->ulLcPrbEst.dedLcInfo != NULLP)
+ updateGrantSizeForBoRpt(&(ueCb->ulLcPrbEst.dedLcInfo->dedLcList), NULLP, ueCb->bsrInfo, totTBS);
+
+ updateGrantSizeForBoRpt(&(ueCb->ulLcPrbEst.defLcList), NULLP, ueCb->bsrInfo, totTBS);
+
+ /*Below case will hit if NO LC(s) are allocated due to resource crunch*/
+ if (*totTBS == 0)
+ {
+ if(maxFreePRB == 0)
+ {
+ DU_LOG("\nERROR --> SCH : NO FREE PRB!!");
+ }
+ else
+ {
+ /*Schedule the LC for next slot*/
+ DU_LOG("\nDEBUG --> SCH : No LC has been scheduled");
+ }
+ return (false);
+ }
+ return (true);
+}
+
+/*******************************************************************
+ *
+ * @brief sch Process pending Sr or Bsr Req
+ *
+ * @details
+ *
+ * Function : schProcessSrOrBsrReq
+ *
+ * Functionality:
+ * sch Process pending Sr or Bsr Req
+ *
+ * @params[in] SchCellCb *cell, SlotTimingInfo currTime
+ * @return ROK - success
+ * RFAILED - failure
+ *
+ *******************************************************************/
+bool schProcessSrOrBsrReq(SchCellCb *cell, SlotTimingInfo currTime, uint8_t ueId)
+{
+ bool k2Found = FALSE, ret = FALSE;
+ uint8_t startSymb = 0, symbLen = 0;
+ uint8_t k2TblIdx = 0, k2Index = 0, k2Val = 0;
+ uint16_t startPrb = 0;
+ uint32_t totDataReq = 0; /* in bytes */
+ SchUeCb *ueCb;
+ SchPuschInfo *puschInfo;
+ DciInfo *dciInfo = NULLP;
+ SchK2TimingInfoTbl *k2InfoTbl=NULLP;
+ SlotTimingInfo dciTime, puschTime;
+
+ if(cell == NULLP)
+ {
+ DU_LOG("\nERROR --> SCH: schDlRsrcAllocMsg4() : Cell is NULL");
+ return false;
+ }
+
+ ueCb = &cell->ueCb[ueId-1];
+
+ if(ueCb == NULLP)
+ {
+ DU_LOG("\nERROR --> SCH: schDlRsrcAllocMsg4() : UE is NULL");
+ return false;
+ }
+ /* Calculating time frame to send DCI for SR */
+ ADD_DELTA_TO_TIME(currTime, dciTime, PHY_DELTA_DL + SCHED_DELTA);
+#ifdef NR_TDD
+ if(schGetSlotSymbFrmt(dciTime.slot, cell->slotFrmtBitMap) == DL_SLOT)
+#endif
+ {
+ if(ueCb->ueCfg.spCellCfg.servCellCfg.initUlBwp.k2TblPrsnt)
+ k2InfoTbl = &ueCb->ueCfg.spCellCfg.servCellCfg.initUlBwp.k2InfoTbl;
+ else
+ k2InfoTbl = &cell->cellCfg.schInitialUlBwp.k2InfoTbl;
+
+ for(k2TblIdx = 0; k2TblIdx < k2InfoTbl->k2TimingInfo[dciTime.slot].numK2; k2TblIdx++)
+ {
+ k2Index = k2InfoTbl->k2TimingInfo[dciTime.slot].k2Indexes[k2TblIdx];
+
+ if(!ueCb->ueCfg.spCellCfg.servCellCfg.initUlBwp.k2TblPrsnt)
+ {
+ k2Val = cell->cellCfg.schInitialUlBwp.puschCommon.timeDomRsrcAllocList[k2Index].k2;
+ startSymb = cell->cellCfg.schInitialUlBwp.puschCommon.timeDomRsrcAllocList[k2Index].startSymbol;
+ symbLen = cell->cellCfg.schInitialUlBwp.puschCommon.timeDomRsrcAllocList[k2Index].symbolLength;
+ }
+ else
+ {
+ k2Val = ueCb->ueCfg.spCellCfg.servCellCfg.initUlBwp.puschCfg.timeDomRsrcAllocList[k2Index].k2;
+ startSymb = ueCb->ueCfg.spCellCfg.servCellCfg.initUlBwp.puschCfg.timeDomRsrcAllocList[k2Index].startSymbol;
+ symbLen = ueCb->ueCfg.spCellCfg.servCellCfg.initUlBwp.puschCfg.timeDomRsrcAllocList[k2Index].symbolLength;
+ }
+
+ /* Calculating time frame to send PUSCH for SR */
+ ADD_DELTA_TO_TIME(dciTime, puschTime, k2Val);
+#ifdef NR_TDD
+ if(schGetSlotSymbFrmt(puschTime.slot, cell->slotFrmtBitMap) == DL_SLOT)
+ continue;
+#endif
+ if(cell->schUlSlotInfo[puschTime.slot]->puschUe != 0)
+ {
+ continue;
+ }
+ k2Found = true;
+ break;
+ }
+ }
+
+ if(k2Found == true)
+ {
+ ret = schCalculateUlTbs(ueCb, puschTime, symbLen, &startPrb, &totDataReq);
+ if(totDataReq > 0 && ret == TRUE)
+ {
+ SCH_ALLOC(dciInfo, sizeof(DciInfo));
+ if(!dciInfo)
+ {
+ DU_LOG("\nERROR --> SCH : Memory Allocation failed for dciInfo alloc");
+
+ if(ueCb->ulLcPrbEst.dedLcInfo != NULLP)
+ updateBsrAndLcList(&(ueCb->ulLcPrbEst.dedLcInfo->dedLcList), ueCb->bsrInfo, RFAILED);
+
+ updateBsrAndLcList(&(ueCb->ulLcPrbEst.defLcList), ueCb->bsrInfo, RFAILED);
+ return false;
+ }
+ cell->schDlSlotInfo[dciTime.slot]->ulGrant = dciInfo;
+ memset(dciInfo,0,sizeof(DciInfo));
+
+ /* Update PUSCH allocation */
+ if(schFillPuschAlloc(ueCb, puschTime, totDataReq, startSymb, symbLen, startPrb) == ROK)
+ {
+ if(cell->schUlSlotInfo[puschTime.slot]->schPuschInfo)
+ {
+ puschInfo = cell->schUlSlotInfo[puschTime.slot]->schPuschInfo;
+ if(puschInfo != NULLP)
+ {
+ /* Fill DCI for UL grant */
+ schFillUlDci(ueCb, puschInfo, dciInfo);
+ memcpy(&dciInfo->slotIndInfo, &dciTime, sizeof(SlotTimingInfo));
+ ueCb->srRcvd = false;
+ ueCb->bsrRcvd = false;
+ cell->schUlSlotInfo[puschTime.slot]->puschUe = ueId;
+ if(ueCb->ulLcPrbEst.dedLcInfo != NULLP)
+ updateBsrAndLcList(&(ueCb->ulLcPrbEst.dedLcInfo->dedLcList), ueCb->bsrInfo, ROK);
+
+ updateBsrAndLcList(&(ueCb->ulLcPrbEst.defLcList), ueCb->bsrInfo, ROK);
+ return true;
+ }
+ }
+ }
+
+ if(ueCb->ulLcPrbEst.dedLcInfo != NULLP)
+ updateBsrAndLcList(&(ueCb->ulLcPrbEst.dedLcInfo->dedLcList), ueCb->bsrInfo, RFAILED);
+
+ updateBsrAndLcList(&(ueCb->ulLcPrbEst.defLcList), ueCb->bsrInfo, RFAILED);
+ }
+ }
+ return (ret);
+}
+
+
+/*******************************************************************
+ *
+ * @brief sch Process pending Sr or Bsr Req
+ *
+ * @details
+ *
+ * Function : updateBsrAndLcList
+ *
+ * Functionality:
+ * Updating the BSRInfo in UECB and Lclist
+ *
+ * @params[in] SchCellCb *cell, SlotTimingInfo currTime
+ * @return ROK - success
+ * RFAILED - failure
+ *
+ *******************************************************************/
+void updateBsrAndLcList(CmLListCp *lcLL, BsrInfo *bsrInfo, uint8_t status)
+{
+ CmLList *node = NULLP, *next = NULLP;
+ LcInfo *lcNode = NULLP;
+
+ if(lcLL == NULLP)
+ {
+ DU_LOG("\nERROR --> SCH: LcList not present");
+ return;
+ }
+
+ if(lcLL->count)
+ {
+ node = lcLL->first;
+ }
+ else
+ {
+ /*lcLL is empty*/
+ return;
+ }
+
+ while(node)
+ {
+ next = node->next;
+ lcNode = (LcInfo *)node->node;
+ if(lcNode != NULLP)
+ {
+ /*Only when Status is OK then allocation is marked as ZERO and reqBO
+ * is updated in UE's DB. If Failure, then allocation is added to reqBO
+ * and same is updated in Ue's DB inside BSR Info structure*/
+ if(status == ROK)
+ {
+ lcNode->allocBO = 0;
+ }
+
+ lcNode->reqBO += lcNode->allocBO;
+ bsrInfo[lcNode->lcId].dataVol = lcNode->reqBO;
+ if(lcNode->reqBO == 0)
+ {
+ handleLcLList(lcLL, lcNode->lcId, DELETE);
+ }
+ }
+ node = next;
+ }
+}
+
+/********************************************************************************
+ *
+ * @brief Increment the Slot by a input factor
+ *
+ * @details
+ *
+ * Function : schIncrSlot
+ *
+ * Functionality:
+ * Increment the slot by a input factor till num of Slots configured in a
+ * Radio Frame. If it exceeds, move to next sfn.
+ *
+ * @params[in/out] SlotTimingInfo timingInfo
+ * [in] uint8_t incr [Increment factor]
+ * [in] numSlotsPerRF [Number of Slots configured per RF as per
+ * numerology]
+ * @return ROK - success
+ * RFAILED - failure
+ *
+ *******************************************************************/
+void schIncrSlot(SlotTimingInfo *timingInfo, uint8_t incr, uint16_t numSlotsPerRF)
+{
+ timingInfo->slot += incr;
+ if(timingInfo->slot >= numSlotsPerRF)
+ {
+ timingInfo->sfn += timingInfo->slot/numSlotsPerRF;
+ timingInfo->slot %= numSlotsPerRF;
+ if(timingInfo->sfn > MAX_SFN)
+ {
+ timingInfo->sfn %= MAX_SFN;
+ }
+ }
+}