rxtx.c

VIA VT6656 USB linux source code.

            } else {
                return (pDevice->uSIFS + uNextPktTime);
            }
        }
        break;


    case DATADUR_A:    //DATADUR_A
        if (((uMACfragNum==1)) || (bLastFrag==1)) {//Non Frag or Last Frag
            if(bNeedAck){
            	uAckTime = BBuGetFrameTime(pDevice->byPreambleType, byPktType, 14, pDevice->byTopOFDMBasicRate);
                return (pDevice->uSIFS + uAckTime);
            } else {
                return 0;
            }
        }
        else {//First Frag or Mid Frag
            if(uFragIdx == (uMACfragNum-2)){
            	uNextPktTime = s_uGetTxRsvTime(pDevice, byPktType, cbLastFragmentSize, wRate, bNeedAck);
            } else {
                uNextPktTime = s_uGetTxRsvTime(pDevice, byPktType, cbFrameLength, wRate, bNeedAck);
            }
            if(bNeedAck){
            	uAckTime = BBuGetFrameTime(pDevice->byPreambleType, byPktType, 14, pDevice->byTopOFDMBasicRate);
                return (pDevice->uSIFS + uAckTime + uNextPktTime);
            } else {
                return (pDevice->uSIFS + uNextPktTime);
            }
        }
        break;

    case DATADUR_A_F0:    //DATADUR_A_F0
	    if (((uMACfragNum==1)) || (bLastFrag==1)) {//Non Frag or Last Frag
            if(bNeedAck){
            	uAckTime = BBuGetFrameTime(pDevice->byPreambleType, byPktType, 14, pDevice->byTopOFDMBasicRate);
                return (pDevice->uSIFS + uAckTime);
            } else {
                return 0;
            }
        }
	    else { //First Frag or Mid Frag
	        if (byFBOption == AUTO_FB_0) {
                if (wRate < RATE_18M)
                    wRate = RATE_18M;
                else if (wRate > RATE_54M)
                    wRate = RATE_54M;

	            if(uFragIdx == (uMACfragNum-2)){
            	    uNextPktTime = s_uGetTxRsvTime(pDevice, byPktType, cbLastFragmentSize, wFB_Opt0[FB_RATE0][wRate-RATE_18M], bNeedAck);
                } else {
                    uNextPktTime = s_uGetTxRsvTime(pDevice, byPktType, cbFrameLength, wFB_Opt0[FB_RATE0][wRate-RATE_18M], bNeedAck);
                }
	        } else { // (byFBOption == AUTO_FB_1)
                if (wRate < RATE_18M)
                    wRate = RATE_18M;
                else if (wRate > RATE_54M)
                    wRate = RATE_54M;

	            if(uFragIdx == (uMACfragNum-2)){
            	    uNextPktTime = s_uGetTxRsvTime(pDevice, byPktType, cbLastFragmentSize, wFB_Opt1[FB_RATE0][wRate-RATE_18M], bNeedAck);
                } else {
                    uNextPktTime = s_uGetTxRsvTime(pDevice, byPktType, cbFrameLength, wFB_Opt1[FB_RATE0][wRate-RATE_18M], bNeedAck);
                }
	        }	        
	        
	        if(bNeedAck){
            	uAckTime = BBuGetFrameTime(pDevice->byPreambleType, byPktType, 14, pDevice->byTopOFDMBasicRate);
                return (pDevice->uSIFS + uAckTime + uNextPktTime);
            } else {
                return (pDevice->uSIFS + uNextPktTime);
            }
	    }
        break;

    case DATADUR_A_F1:    //DATADUR_A_F1
        if (((uMACfragNum==1)) || (bLastFrag==1)) {//Non Frag or Last Frag
            if(bNeedAck){
            	uAckTime = BBuGetFrameTime(pDevice->byPreambleType, byPktType, 14, pDevice->byTopOFDMBasicRate);
                return (pDevice->uSIFS + uAckTime);
            } else {
                return 0;
            }
        }
	    else { //First Frag or Mid Frag
	        if (byFBOption == AUTO_FB_0) {
                if (wRate < RATE_18M)
                    wRate = RATE_18M;
                else if (wRate > RATE_54M)
                    wRate = RATE_54M;

	            if(uFragIdx == (uMACfragNum-2)){
            	    uNextPktTime = s_uGetTxRsvTime(pDevice, byPktType, cbLastFragmentSize, wFB_Opt0[FB_RATE1][wRate-RATE_18M], bNeedAck);
                } else {
                    uNextPktTime = s_uGetTxRsvTime(pDevice, byPktType, cbFrameLength, wFB_Opt0[FB_RATE1][wRate-RATE_18M], bNeedAck);
                }

	        } else { // (byFBOption == AUTO_FB_1)
                if (wRate < RATE_18M)
                    wRate = RATE_18M;
                else if (wRate > RATE_54M)
                    wRate = RATE_54M;

	            if(uFragIdx == (uMACfragNum-2)){
            	    uNextPktTime = s_uGetTxRsvTime(pDevice, byPktType, cbLastFragmentSize, wFB_Opt1[FB_RATE1][wRate-RATE_18M], bNeedAck);
                } else {
                    uNextPktTime = s_uGetTxRsvTime(pDevice, byPktType, cbFrameLength, wFB_Opt1[FB_RATE1][wRate-RATE_18M], bNeedAck);
                }
	        }	        
	        if(bNeedAck){
            	uAckTime = BBuGetFrameTime(pDevice->byPreambleType, byPktType, 14, pDevice->byTopOFDMBasicRate);
                return (pDevice->uSIFS + uAckTime + uNextPktTime);
            } else {
                return (pDevice->uSIFS + uNextPktTime);
            }
	    }
        break;

    default:
        break;
    }    

	ASSERT(FALSE);
	return 0;
}


//byFreqType: 0=>5GHZ 1=>2.4GHZ
static
UINT
s_uGetRTSCTSDuration (
    IN PSDevice pDevice,
    IN BYTE byDurType,
    IN UINT cbFrameLength,
    IN BYTE byPktType,
    IN WORD wRate,
    IN BOOL bNeedAck,
    IN BYTE byFBOption
    )
{
    UINT uCTSTime = 0, uDurTime = 0;
    
    
    switch (byDurType) {

    case RTSDUR_BB:    //RTSDuration_bb
        uCTSTime = BBuGetFrameTime(pDevice->byPreambleType, byPktType, 14, pDevice->byTopCCKBasicRate);
        uDurTime = uCTSTime + 2*pDevice->uSIFS + s_uGetTxRsvTime(pDevice, byPktType, cbFrameLength, wRate, bNeedAck);
        break;

    case RTSDUR_BA:    //RTSDuration_ba
        uCTSTime = BBuGetFrameTime(pDevice->byPreambleType, byPktType, 14, pDevice->byTopCCKBasicRate);
        uDurTime = uCTSTime + 2*pDevice->uSIFS + s_uGetTxRsvTime(pDevice, byPktType, cbFrameLength, wRate, bNeedAck);
        break;

    case RTSDUR_AA:    //RTSDuration_aa
        uCTSTime = BBuGetFrameTime(pDevice->byPreambleType, byPktType, 14, pDevice->byTopOFDMBasicRate);
        uDurTime = uCTSTime + 2*pDevice->uSIFS + s_uGetTxRsvTime(pDevice, byPktType, cbFrameLength, wRate, bNeedAck);
        break;

    case CTSDUR_BA:    //CTSDuration_ba
        uDurTime = pDevice->uSIFS + s_uGetTxRsvTime(pDevice, byPktType, cbFrameLength, wRate, bNeedAck);
        break;

    case RTSDUR_BA_F0: //RTSDuration_ba_f0
        uCTSTime = BBuGetFrameTime(pDevice->byPreambleType, byPktType, 14, pDevice->byTopCCKBasicRate);
        if ((byFBOption == AUTO_FB_0) && (wRate >= RATE_18M) && (wRate <=RATE_54M)) {
            uDurTime = uCTSTime + 2*pDevice->uSIFS + s_uGetTxRsvTime(pDevice, byPktType, cbFrameLength, wFB_Opt0[FB_RATE0][wRate-RATE_18M], bNeedAck);
        } else if ((byFBOption == AUTO_FB_1) && (wRate >= RATE_18M) && (wRate <=RATE_54M)) {
            uDurTime = uCTSTime + 2*pDevice->uSIFS + s_uGetTxRsvTime(pDevice, byPktType, cbFrameLength, wFB_Opt1[FB_RATE0][wRate-RATE_18M], bNeedAck);
        }
        break;

    case RTSDUR_AA_F0: //RTSDuration_aa_f0
        uCTSTime = BBuGetFrameTime(pDevice->byPreambleType, byPktType, 14, pDevice->byTopOFDMBasicRate);
        if ((byFBOption == AUTO_FB_0) && (wRate >= RATE_18M) && (wRate <=RATE_54M)) {
            uDurTime = uCTSTime + 2*pDevice->uSIFS + s_uGetTxRsvTime(pDevice, byPktType, cbFrameLength, wFB_Opt0[FB_RATE0][wRate-RATE_18M], bNeedAck);
        } else if ((byFBOption == AUTO_FB_1) && (wRate >= RATE_18M) && (wRate <=RATE_54M)) {
            uDurTime = uCTSTime + 2*pDevice->uSIFS + s_uGetTxRsvTime(pDevice, byPktType, cbFrameLength, wFB_Opt1[FB_RATE0][wRate-RATE_18M], bNeedAck);
        }
        break;

    case RTSDUR_BA_F1: //RTSDuration_ba_f1
        uCTSTime = BBuGetFrameTime(pDevice->byPreambleType, byPktType, 14, pDevice->byTopCCKBasicRate);
        if ((byFBOption == AUTO_FB_0) && (wRate >= RATE_18M) && (wRate <=RATE_54M)) {
            uDurTime = uCTSTime + 2*pDevice->uSIFS + s_uGetTxRsvTime(pDevice, byPktType, cbFrameLength, wFB_Opt0[FB_RATE1][wRate-RATE_18M], bNeedAck);
        } else if ((byFBOption == AUTO_FB_1) && (wRate >= RATE_18M) && (wRate <=RATE_54M)) {
            uDurTime = uCTSTime + 2*pDevice->uSIFS + s_uGetTxRsvTime(pDevice, byPktType, cbFrameLength, wFB_Opt1[FB_RATE1][wRate-RATE_18M], bNeedAck);
        }
        break;

    case RTSDUR_AA_F1: //RTSDuration_aa_f1
        uCTSTime = BBuGetFrameTime(pDevice->byPreambleType, byPktType, 14, pDevice->byTopOFDMBasicRate);
        if ((byFBOption == AUTO_FB_0) && (wRate >= RATE_18M) && (wRate <=RATE_54M)) {
            uDurTime = uCTSTime + 2*pDevice->uSIFS + s_uGetTxRsvTime(pDevice, byPktType, cbFrameLength, wFB_Opt0[FB_RATE1][wRate-RATE_18M], bNeedAck);
        } else if ((byFBOption == AUTO_FB_1) && (wRate >= RATE_18M) && (wRate <=RATE_54M)) {
            uDurTime = uCTSTime + 2*pDevice->uSIFS + s_uGetTxRsvTime(pDevice, byPktType, cbFrameLength, wFB_Opt1[FB_RATE1][wRate-RATE_18M], bNeedAck);
        }
        break;

    case CTSDUR_BA_F0: //CTSDuration_ba_f0
        if ((byFBOption == AUTO_FB_0) && (wRate >= RATE_18M) && (wRate <=RATE_54M)) {
            uDurTime = pDevice->uSIFS + s_uGetTxRsvTime(pDevice, byPktType, cbFrameLength, wFB_Opt0[FB_RATE0][wRate-RATE_18M], bNeedAck);
        } else if ((byFBOption == AUTO_FB_1) && (wRate >= RATE_18M) && (wRate <=RATE_54M)) {
            uDurTime = pDevice->uSIFS + s_uGetTxRsvTime(pDevice, byPktType, cbFrameLength, wFB_Opt1[FB_RATE0][wRate-RATE_18M], bNeedAck);
        }
        break;

    case CTSDUR_BA_F1: //CTSDuration_ba_f1
        if ((byFBOption == AUTO_FB_0) && (wRate >= RATE_18M) && (wRate <=RATE_54M)) {
            uDurTime = pDevice->uSIFS + s_uGetTxRsvTime(pDevice, byPktType, cbFrameLength, wFB_Opt0[FB_RATE1][wRate-RATE_18M], bNeedAck);
        } else if ((byFBOption == AUTO_FB_1) && (wRate >= RATE_18M) && (wRate <=RATE_54M)) {
            uDurTime = pDevice->uSIFS + s_uGetTxRsvTime(pDevice, byPktType, cbFrameLength, wFB_Opt1[FB_RATE1][wRate-RATE_18M], bNeedAck);
        }
        break;

    default:
        break;
    }    
    
    return uDurTime;

}




static
UINT
s_uFillDataHead (
    IN PSDevice pDevice,
    IN BYTE     byPktType,
    IN WORD     wCurrentRate,
    IN PVOID    pTxDataHead,
    IN UINT     cbFrameLength,
    IN UINT     uDMAIdx,
    IN BOOL     bNeedAck,
    IN UINT     uFragIdx,
    IN UINT     cbLastFragmentSize,
    IN UINT     uMACfragNum,
    IN BYTE     byFBOption
    )
{
    
    if (pTxDataHead == NULL) {
        return 0;
    }

    if (byPktType == PK_TYPE_11GB || byPktType == PK_TYPE_11GA) {
        if((uDMAIdx==TYPE_ATIMDMA)||(uDMAIdx==TYPE_BEACONDMA)) {
            PSTxDataHead_ab pBuf = (PSTxDataHead_ab)pTxDataHead;
            //Get SignalField,ServiceField,Length
            BBvCaculateParameter(pDevice, cbFrameLength, wCurrentRate, byPktType,
                (PWORD)&(pBuf->wTransmitLength), (PBYTE)&(pBuf->byServiceField), (PBYTE)&(pBuf->bySignalField)
            );
            //Get Duration and TimeStampOff
            pBuf->wDuration = (WORD)s_uGetDataDuration(pDevice, DATADUR_A, cbFrameLength, byPktType,
                                                       wCurrentRate, bNeedAck, uFragIdx,
                                                       cbLastFragmentSize, uMACfragNum,
                                                       byFBOption); //1: 2.4GHz
            if(uDMAIdx!=TYPE_ATIMDMA) {
                pBuf->wTimeStampOff = wTimeStampOff[pDevice->byPreambleType%2][wCurrentRate%MAX_RATE];
            }
            return (pBuf->wDuration);
        }
        else { // DATA & MANAGE Frame
            if (byFBOption == AUTO_FB_NONE) {
                PSTxDataHead_g pBuf = (PSTxDataHead_g)pTxDataHead;
                //Get SignalField,ServiceField,Length
                BBvCaculateParameter(pDevice, cbFrameLength, wCurrentRate, byPktType,
                    (PWORD)&(pBuf->wTransmitLength_a), (PBYTE)&(pBuf->byServiceField_a), (PBYTE)&(pBuf->bySignalField_a)
                );
                BBvCaculateParameter(pDevice, cbFrameLength, pDevice->byTopCCKBasicRate, PK_TYPE_11B,
                    (PWORD)&(pBuf->wTransmitLength_b), (PBYTE)&(pBuf->byServiceField_b), (PBYTE)&(pBuf->bySignalField_b)
                );
                //Get Duration and TimeStamp
                pBuf->wDuration_a = (WORD)s_uGetDataDuration(pDevice, DATADUR_A, cbFrameLength,
                                                             byPktType, wCurrentRate, bNeedAck, uFragIdx,
                                                             cbLastFragmentSize, uMACfragNum,
                                                             byFBOption); //1: 2.4GHz
                pBuf->wDuration_b = (WORD)s_uGetDataDuration(pDevice, DATADUR_B, cbFrameLength,
                                                             PK_TYPE_11B, pDevice->byTopCCKBasicRate,
                                                             bNeedAck, uFragIdx, cbLastFragmentSize,
                                                             uMACfragNum, byFBOption); //1: 2.4GHz

                pBuf->wTimeStampOff_a = wTimeStampOff[pDevice->byPreambleType%2][wCurrentRate%MAX_RATE];
                pBuf->wTimeStampOff_b = wTimeStampOff[pDevice->byPreambleType%2][pDevice->byTopCCKBasicRate%MAX_RATE];
                return (pBuf->wDuration_a);
             } else {
                // Auto Fallback
                PSTxDataHead_g_FB pBuf = (PSTxDataHead_g_FB)pTxDataHead;
                //Get SignalField,ServiceField,Length
                BBvCaculateParameter(pDevice, cbFrameLength, wCurrentRate, byPktType,
                    (PWORD)&(pBuf->wTransmitLength_a), (PBYTE)&(pBuf->byServiceField_a), (PBYTE)&(pBuf->bySignalField_a)
                );
                BBvCaculateParameter(pDevice, cbFrameLength, pDevice->byTopCCKBasicRate, PK_TYPE_11B,
                    (PWORD)&(pBuf->wTransmitLength_b), (PBYTE)&(pBuf->byServiceField_b), (PBYTE)&(pBuf->bySignalField_b)
                );
                //Get Duration and TimeStamp
                pBuf->wDuration_a = (WORD)s_uGetDataDuration(pDevice, DATADUR_A, cbFrameLength, byPktType,
                                             wCurrentRate, bNeedAck, uFragIdx, cbLastFragmentSize, uMACfragNum, byFBOption); //1: 2.4GHz
                pBuf->wDuration_b = (WORD)s_uGetDataDuration(pDevice, DATADUR_B, cbFrameLength, PK_TYPE_11B,
                                             pDevice->byTopCCKBasicRate, bNeedAck, uFragIdx, cbLastFragmentSize, uMACfragNum, byFBOption); //1: 2.4GHz
                pBuf->wDuration_a_f0 = (WORD)s_uGetDataDuration(pDevice, DATADUR_A_F0, cbFrameLength, byPktType,
                                             wCurrentRate, bNeedAck, uFragIdx, cbLastFragmentSize, uMACfragNum, byFBOption); //1: 2.4GHz
                pBuf->wDuration_a_f1 = (WORD)s_uGetDataDuration(pDevice, DATADUR_A_F1, cbFrameLength, byPktType,
                                             wCurrentRate, bNeedAck, uFragIdx, cbLastFragmentSize, uMACfragNum, byFBOption); //1: 2.4GHz
                pBuf->wTimeStampOff_a = wTimeStampOff[pDevice->byPreambleType%2][wCurrentRate%MAX_RATE];
                pBuf->wTimeStampOff_b = wTimeStampOff[pDevice->byPreambleType%2][pDevice->byTopCCKBasicRate%MAX_RATE];
                return (pBuf->wDuration_a);
            } //if (byFBOption == AUTO_FB_NONE)
        }
    }
    else if (byPktType == PK_TYPE_11A) {
        if ((byFBOption != AUTO_FB_NONE) && (uDMAIdx != TYPE_ATIMDMA) && (uDMAIdx != TYPE_BEACONDMA)) {
            // Auto Fallback
            PSTxDataHead_a_FB pBuf = (PSTxDataHead_a_FB)pTxDataHead;
            //Get SignalField,ServiceField,Length
            BBvCaculateParameter(pDevice, cbFrameLength, wCurrentRate, byPktType,
                (PWORD)&(pBuf->wTransmitLength), (PBYTE)&(pBuf->byServiceField), (PBYTE)&(pBuf->bySignalField)
            );
            //Get Duration and TimeStampOff
            pBuf->wDuration = (WORD)s_uGetDataDuration(pDevice, DATADUR_A, cbFrameLength, byPktType,
                                        wCurrentRate, bNeedAck, uFragIdx, cbLastFragmentSize, uMACfragNum, byFBOption); //0: 5GHz