void StaRateAdaptive87B(_adapter *padapter )
{
struct mib_info *_sys_mib = &(padapter->_sys_mib);
u64 CurrTxokCnt;
u16 CurrRetryCnt;
u16 CurrRetryRate;
u8 CurrentOperaRate;
u64 CurrRxokCnt;
u8 bTryUp = _FALSE;
u8 bTryDown = _FALSE;
u8 TryUpTh = 1;
u8 TryDownTh = 2;
u32 TxThroughput;
s32 CurrSignalStrength;
u8 bUpdateInitialGain = _FALSE;
CurrRetryCnt = _sys_mib->CurrRetryCnt;
CurrTxokCnt = _sys_mib->NumTxOkTotal - _sys_mib->LastTxokCnt;
CurrRxokCnt = _sys_mib->NumRxOkTotal - _sys_mib->LastRxokCnt;
CurrSignalStrength = _sys_mib->RecvSignalPower;
TxThroughput = (u32)(_sys_mib->NumTxOkBytesTotal - _sys_mib->LastTxOKBytes);
_sys_mib->LastTxOKBytes = _sys_mib->NumTxOkBytesTotal;
CurrentOperaRate = (u8)((_sys_mib->rate/10) * 2);
DEBUG_INFO(("CurrentOperaRate = %d \n", CurrentOperaRate));
//2 Compute retry ratio.
if (CurrTxokCnt>0)
{
CurrRetryRate = (u16)((int)CurrRetryCnt*100/(int)CurrTxokCnt);
}
else
{ // It may be serious retry. To distinguish serious retry or no packets modified by Bruce
CurrRetryRate = (u16)((int)CurrRetryCnt*100/1);
}
//
// For debug information.
//
DEBUG_INFO(("\n(1) LastRetryRate: %d \n",(int)_sys_mib->LastRetryRate));
DEBUG_INFO(("(2) RetryCnt = %d \n", (int)CurrRetryCnt));
DEBUG_INFO(("(3) TxokCnt = %d \n", (int)CurrTxokCnt));
DEBUG_INFO(("(4) CurrRetryRate = %d \n", (int)CurrRetryRate));
DEBUG_INFO(("(5) SignalStrength = %d \n",(int)_sys_mib->RecvSignalPower));
DEBUG_INFO(("(6) ReceiveSignalPower = %d \n",(int)CurrSignalStrength));
_sys_mib->LastRetryCnt = _sys_mib->CurrRetryCnt;
_sys_mib->LastTxokCnt = _sys_mib->NumTxOkTotal;
_sys_mib->LastRxokCnt = _sys_mib->NumRxOkTotal;
_sys_mib->CurrRetryCnt = 0;
//2No Tx packets, return to init_rate or not?
if (CurrRetryRate==0 && CurrTxokCnt == 0)
{
//
// 2007.04.09, by Roger.
//After 4.5 seconds in this condition, we try to raise rate.
//
_sys_mib->TryupingCountNoData++;
if (_sys_mib->TryupingCountNoData>15)
{
_sys_mib->TryupingCountNoData = 0;
CurrentOperaRate = GetUpgradeTxRate(padapter, CurrentOperaRate);
// Reset Fail Record
_sys_mib->LastFailTxRate = 0;
_sys_mib->LastFailTxRateSS = -200;
_sys_mib->FailTxRateCount = 0;
}
goto SetInitialGain;
}
else
{
_sys_mib->TryupingCountNoData=0; //Reset trying up times.
}
//
// Restructure rate adaptive as the following main stages:
// (1) Add retry threshold in 54M upgrading condition with signal strength.
// (2) Add the mechanism to degrade to CCK rate according to signal strength
// and retry rate.
// (3) Remove all Initial Gain Updates over OFDM rate. To avoid the complicated
// situation, Initial Gain Update is upon on DIG mechanism except CCK rate.
// (4) Add the mehanism of trying to upgrade tx rate.
// (5) Record the information of upping tx rate to avoid trying upping tx rate constantly.
// By Bruce, 2007-06-05.
//
//
// 11Mbps or 36Mbps
// Check more times in these rate(key rates).
//
if(CurrentOperaRate == 22 || CurrentOperaRate == 72)
{
TryUpTh += 9;
}
//
// Let these rates down more difficult.
//
if(MgntIsCckRate(CurrentOperaRate) || CurrentOperaRate == 36)
{
TryDownTh += 1;
}
//1 Adjust Rate.
if (_sys_mib->bTryuping == _TRUE)
{
//2 For Test Upgrading mechanism
// Note:
// Sometimes the throughput is upon on the capability bwtween the AP and NIC,
// thus the low data rate does not improve the performance.
// We randomly upgrade the data rate and check if the retry rate is improved.
// Upgrading rate did not improve the retry rate, fallback to the original rate.
if ( (CurrRetryRate > 25) && TxThroughput < _sys_mib->LastTxThroughput )
{
//Not necessary raising rate, fall back rate.
bTryDown = _TRUE;
}
else
{
_sys_mib->bTryuping = _FALSE;
}
}
else if (CurrSignalStrength > -51 && (CurrRetryRate < 100))
{
//2For High Power
//
// Added by Roger, 2007.04.09.
// Return to highest data rate, if signal strength is good enough.
// SignalStrength threshold(-50dbm) is for RTL8186.
// Revise SignalStrength threshold to -51dbm.
//
// Also need to check retry rate for safety, by Bruce, 2007-06-05.
if(CurrentOperaRate != 108)
{
bTryUp = _TRUE;
// Upgrade Tx Rate directly.
_sys_mib->TryupingCount += TryUpTh;
}
}
else if(CurrTxokCnt< 100 && CurrRetryRate >= 600)
{
//2 For Serious Retry
//
// Traffic is not busy but our Tx retry is serious.
//
bTryDown = _TRUE;
// Let Rate Mechanism to degrade tx rate directly.
_sys_mib->TryDownCountLowData += TryDownTh;
DEBUG_INFO(("RA: Tx Retry is serious. Degrade Tx Rate to %d directly...\n", CurrentOperaRate));
}
else if ( CurrentOperaRate == 108 )
{
//2For 54Mbps
// if ( (CurrRetryRate>38)&&(pHalData->LastRetryRate>35))
if ( (CurrRetryRate>33)&&(_sys_mib->LastRetryRate>32))
{
//(30,25) for cable link threshold. (38,35) for air link.
//Down to rate 48Mbps.
bTryDown = _TRUE;
}
}
else if ( CurrentOperaRate == 96 )
{
//2For 48Mbps
// if ( ((CurrRetryRate>73) && (pHalData->LastRetryRate>72)) && IncludedInSupportedRates(Adapter, 72) )
if ( ((CurrRetryRate>48) && (_sys_mib->LastRetryRate>47)))
{
//(73, 72) for temp used.
//(25, 23) for cable link, (60,59) for air link.
//CurrRetryRate plus 25 and 26 respectively for air link.
//Down to rate 36Mbps.
bTryDown = _TRUE;
}
else if ( (CurrRetryRate<8) && (_sys_mib->LastRetryRate<8) ) //TO DO: need to consider (RSSI)
{
bTryUp = _TRUE;
}
}
else if ( CurrentOperaRate == 72 )
{
//2For 36Mbps
//if ( (CurrRetryRate>97) && (pHalData->LastRetryRate>97))
if ( (CurrRetryRate>55) && (_sys_mib->LastRetryRate>54))
{
//(30,25) for cable link threshold respectively. (103,10) for air link respectively.
//CurrRetryRate plus 65 and 69 respectively for air link threshold.
//Down to rate 24Mbps.
bTryDown = _TRUE;
}
// else if ( (CurrRetryRate<20) && (pHalData->LastRetryRate<20) && IncludedInSupportedRates(Adapter, 96) )//&& (device->LastRetryRate<15) ) //TO DO: need to consider (RSSI)
else if ( (CurrRetryRate<15) && (_sys_mib->LastRetryRate<16))//&& (device->LastRetryRate<15) ) //TO DO: need to consider (RSSI)
{
bTryUp = _TRUE;
}
}
else if ( CurrentOperaRate == 48 )
{
//2For 24Mbps
// if ( ((CurrRetryRate>119) && (pHalData->LastRetryRate>119) && IncludedInSupportedRates(Adapter, 36)))
if ( ((CurrRetryRate>63) && (_sys_mib->LastRetryRate>62)))
{
//(15,15) for cable link threshold respectively. (119, 119) for air link threshold.
//Plus 84 for air link threshold.
//Down to rate 18Mbps.
bTryDown = _TRUE;
}
// else if ( (CurrRetryRate<14) && (pHalData->LastRetryRate<15) && IncludedInSupportedRates(Adapter, 72)) //TO DO: need to consider (RSSI)
else if ( (CurrRetryRate<20) && (_sys_mib->LastRetryRate<21)) //TO DO: need to consider (RSSI)
{
bTryUp = _TRUE;
}
}
else if ( CurrentOperaRate == 36 )
{
//2For 18Mbps
if ( ((CurrRetryRate>109) && (_sys_mib->LastRetryRate>109)))
{
//(99,99) for cable link, (109,109) for air link.
//Down to rate 11Mbps.
bTryDown = _TRUE;
}
// else if ( (CurrRetryRate<15) && (pHalData->LastRetryRate<16) && IncludedInSupportedRates(Adapter, 48)) //TO DO: need to consider (RSSI)
else if ( (CurrRetryRate<25) && (_sys_mib->LastRetryRate<26)) //TO DO: need to consider (RSSI)
{
bTryUp = _TRUE;
}
}
else if ( CurrentOperaRate == 22 )
{
//2For 11Mbps
// if (CurrRetryRate>299 && IncludedInSupportedRates(Adapter, 11))
if (CurrRetryRate>95)
{
bTryDown = _TRUE;
}
else if (CurrRetryRate<55)//&& (device->LastRetryRate<55) ) //TO DO: need to consider (RSSI)
{
bTryUp = _TRUE;
}
}
else if ( CurrentOperaRate == 11 )
{
//2For 5.5Mbps
// if (CurrRetryRate>159 && IncludedInSupportedRates(Adapter, 4) )
if (CurrRetryRate>149)
{
bTryDown = _TRUE;
}
// else if ( (CurrRetryRate<30) && (pHalData->LastRetryRate<30) && IncludedInSupportedRates(Adapter, 22) )
else if ( (CurrRetryRate<60) && (_sys_mib->LastRetryRate < 65))
{
bTryUp = _TRUE;
}
}
else if ( CurrentOperaRate == 4 )
{
//2For 2 Mbps
if((CurrRetryRate>99) && (_sys_mib->LastRetryRate>99))
{
bTryDown = _TRUE;
}
// else if ( (CurrRetryRate<50) && (pHalData->LastRetryRate<65) && IncludedInSupportedRates(Adapter, 11) )
else if ( (CurrRetryRate < 65) && (_sys_mib->LastRetryRate < 70))
{
bTryUp = _TRUE;
}
}
else if ( CurrentOperaRate == 2 )
{
//2For 1 Mbps
// if ( (CurrRetryRate<50) && (pHalData->LastRetryRate<65) && IncludedInSupportedRates(Adapter, 4))
if ( (CurrRetryRate<70) && (_sys_mib->LastRetryRate<75))
{
bTryUp = _TRUE;
}
}
//1 Test Upgrading Tx Rate
// Sometimes the cause of the low throughput (high retry rate) is the compatibility between the AP and NIC.
// To test if the upper rate may cause lower retry rate, this mechanism randomly occurs to test upgrading tx rate.
if(!bTryUp && !bTryDown && (_sys_mib->TryupingCount == 0) && (_sys_mib->TryDownCountLowData == 0)
&& CurrentOperaRate != 108 && _sys_mib->FailTxRateCount < 2)
{
if(jiffies% (CurrRetryRate + 101) == 0)
{
bTryUp = _TRUE;
_sys_mib->bTryuping = _TRUE;
DEBUG_INFO(("StaRateAdaptive87B(): Randomly try upgrading...\n"));
}
}
//1 Rate Mechanism
if(bTryUp)
{
_sys_mib->TryupingCount++;
_sys_mib->TryDownCountLowData = 0;
//
// Check more times if we need to upgrade indeed.
// Because the largest value of pHalData->TryupingCount is 0xFFFF and
// the largest value of pHalData->FailTxRateCount is 0x14,
// this condition will be satisfied at most every 2 min.
//
if((_sys_mib->TryupingCount > (TryUpTh + _sys_mib->FailTxRateCount * _sys_mib->FailTxRateCount)) ||
(CurrSignalStrength > _sys_mib->LastFailTxRateSS) || _sys_mib->bTryuping)
{
_sys_mib->TryupingCount = 0;
//
// When transfering from CCK to OFDM, DIG is an important issue.
//
if(CurrentOperaRate == 22)
bUpdateInitialGain = _TRUE;
// (1)To avoid upgrade frequently to the fail tx rate, add the FailTxRateCount into the threshold.
// (2)If the signal strength is increased, it may be able to upgrade.
CurrentOperaRate = GetUpgradeTxRate(padapter, CurrentOperaRate);
DEBUG_INFO(("StaRateAdaptive87B(): Upgrade Tx Rate to %d\n", CurrentOperaRate));
// Update Fail Tx rate and count.
if(_sys_mib->LastFailTxRate != CurrentOperaRate)
{
_sys_mib->LastFailTxRate = CurrentOperaRate;
_sys_mib->FailTxRateCount = 0;
_sys_mib->LastFailTxRateSS = -200; // Set lowest power.
}
}
}
else
{
if(_sys_mib->TryupingCount > 0)
_sys_mib->TryupingCount --;
}
if(bTryDown)
{
_sys_mib->TryDownCountLowData++;
_sys_mib->TryupingCount = 0;
//Check if Tx rate can be degraded or Test trying upgrading should fallback.
if(_sys_mib->TryDownCountLowData > TryDownTh || _sys_mib->bTryuping)
{
_sys_mib->TryDownCountLowData = 0;
_sys_mib->bTryuping = _FALSE;
// Update fail information.
if(_sys_mib->LastFailTxRate == CurrentOperaRate)
{
_sys_mib->FailTxRateCount ++;
// Record the Tx fail rate signal strength.
if(CurrSignalStrength > _sys_mib->LastFailTxRateSS)
{
_sys_mib->LastFailTxRateSS = CurrSignalStrength;
}
}
else
{
_sys_mib->LastFailTxRate = CurrentOperaRate;
_sys_mib->FailTxRateCount = 1;
_sys_mib->LastFailTxRateSS = CurrSignalStrength;
}
CurrentOperaRate = GetDegradeTxRate(padapter, CurrentOperaRate);
//
// When it is CCK rate, it may need to update initial gain to receive lower power packets.
//
if(MgntIsCckRate(CurrentOperaRate))
{
bUpdateInitialGain = _TRUE;
}
DEBUG_INFO(("StaRateAdaptive87B(): Degrade Tx Rate to %d\n", CurrentOperaRate));
}
}
else
{
if(_sys_mib->TryDownCountLowData > 0)
_sys_mib->TryDownCountLowData --;
}
// Keep the Tx fail rate count to equal to 0x15 at most.
// Reduce the fail count at least to 10 sec if tx rate is tending stable.
if(_sys_mib->FailTxRateCount >= 0x15 ||
(!bTryUp && !bTryDown && _sys_mib->TryDownCountLowData == 0 && _sys_mib->TryupingCount && _sys_mib->FailTxRateCount > 0x6))
{
_sys_mib->FailTxRateCount --;
}
//
// We need update initial gain when we set tx rate "from OFDM to CCK" or
// "from CCK to OFDM".
//
SetInitialGain:
if(bUpdateInitialGain)
{
if(MgntIsCckRate(CurrentOperaRate)) // CCK
{
if(_sys_mib->InitialGain > _sys_mib->RegBModeGainStage)
{
if(CurrSignalStrength < -85) // Low power, OFDM [0x17] = 26.
{
_sys_mib->InitialGain = _sys_mib->RegBModeGainStage;
}
else if(_sys_mib->InitialGain > _sys_mib->RegBModeGainStage + 1)
{
_sys_mib->InitialGain -= 2;
}
else
{
_sys_mib->InitialGain --;
}
DEBUG_INFO(("StaRateAdaptive87B(): update init_gain to index %d for date rate %d\n",_sys_mib->InitialGain, CurrentOperaRate));
UpdateInitialGain(padapter);
}
}
else // OFDM
{
if(_sys_mib->InitialGain < 4)
{
_sys_mib->InitialGain ++;
DEBUG_INFO(("StaRateAdaptive87B(): update init_gain to index %d for date rate %d\n",_sys_mib->InitialGain, CurrentOperaRate));
UpdateInitialGain(padapter);
}
}
}
//Record the related info
_sys_mib->rate = ((int)CurrentOperaRate/2) *10;
_sys_mib->LastRetryRate = CurrRetryRate;
_sys_mib->LastTxThroughput = TxThroughput;
}
static void StaRateAdaptive87SE(struct net_device *dev)
{
struct r8180_priv *priv = (struct r8180_priv *)ieee80211_priv(dev);
unsigned long CurrTxokCnt;
u16 CurrRetryCnt;
u16 CurrRetryRate;
unsigned long CurrRxokCnt;
bool bTryUp = false;
bool bTryDown = false;
u8 TryUpTh = 1;
u8 TryDownTh = 2;
u32 TxThroughput;
long CurrSignalStrength;
bool bUpdateInitialGain = false;
u8 u1bOfdm = 0, u1bCck = 0;
char OfdmTxPwrIdx, CckTxPwrIdx;
priv->RateAdaptivePeriod = RATE_ADAPTIVE_TIMER_PERIOD;
CurrRetryCnt = priv->CurrRetryCnt;
CurrTxokCnt = priv->NumTxOkTotal - priv->LastTxokCnt;
CurrRxokCnt = priv->ieee80211->NumRxOkTotal - priv->LastRxokCnt;
CurrSignalStrength = priv->Stats_RecvSignalPower;
TxThroughput = (u32)(priv->NumTxOkBytesTotal - priv->LastTxOKBytes);
priv->LastTxOKBytes = priv->NumTxOkBytesTotal;
priv->CurrentOperaRate = priv->ieee80211->rate / 5;
/* 2 Compute retry ratio. */
if (CurrTxokCnt > 0) {
CurrRetryRate = (u16)(CurrRetryCnt * 100 / CurrTxokCnt);
} else {
/* It may be serious retry. To distinguish serious retry or no packets modified by Bruce */
CurrRetryRate = (u16)(CurrRetryCnt * 100 / 1);
}
priv->LastRetryCnt = priv->CurrRetryCnt;
priv->LastTxokCnt = priv->NumTxOkTotal;
priv->LastRxokCnt = priv->ieee80211->NumRxOkTotal;
priv->CurrRetryCnt = 0;
/* 2No Tx packets, return to init_rate or not? */
if (CurrRetryRate == 0 && CurrTxokCnt == 0) {
/*
* After 9 (30*300ms) seconds in this condition, we try to raise rate.
*/
priv->TryupingCountNoData++;
/* [TRC Dell Lab] Extend raised period from 4.5sec to 9sec, Isaiah 2008-02-15 18:00 */
if (priv->TryupingCountNoData > 30) {
priv->TryupingCountNoData = 0;
priv->CurrentOperaRate = GetUpgradeTxRate(dev, priv->CurrentOperaRate);
/* Reset Fail Record */
priv->LastFailTxRate = 0;
priv->LastFailTxRateSS = -200;
priv->FailTxRateCount = 0;
}
goto SetInitialGain;
} else {
priv->TryupingCountNoData = 0; /*Reset trying up times. */
}
/*
* For Netgear case, I comment out the following signal strength estimation,
* which can results in lower rate to transmit when sample is NOT enough (e.g. PING request).
*
* Restructure rate adaptive as the following main stages:
* (1) Add retry threshold in 54M upgrading condition with signal strength.
* (2) Add the mechanism to degrade to CCK rate according to signal strength
* and retry rate.
* (3) Remove all Initial Gain Updates over OFDM rate. To avoid the complicated
* situation, Initial Gain Update is upon on DIG mechanism except CCK rate.
* (4) Add the mechanism of trying to upgrade tx rate.
* (5) Record the information of upping tx rate to avoid trying upping tx rate constantly.
*
*/
/*
* 11Mbps or 36Mbps
* Check more times in these rate(key rates).
*/
if (priv->CurrentOperaRate == 22 || priv->CurrentOperaRate == 72)
TryUpTh += 9;
/*
* Let these rates down more difficult.
*/
if (MgntIsCckRate(priv->CurrentOperaRate) || priv->CurrentOperaRate == 36)
TryDownTh += 1;
/* 1 Adjust Rate. */
if (priv->bTryuping == true) {
/* 2 For Test Upgrading mechanism
* Note:
* Sometimes the throughput is upon on the capability between the AP and NIC,
* thus the low data rate does not improve the performance.
* We randomly upgrade the data rate and check if the retry rate is improved.
*/
/* Upgrading rate did not improve the retry rate, fallback to the original rate. */
if ((CurrRetryRate > 25) && TxThroughput < priv->LastTxThroughput) {
/*Not necessary raising rate, fall back rate. */
bTryDown = true;
} else {
priv->bTryuping = false;
}
} else if (CurrSignalStrength > -47 && (CurrRetryRate < 50)) {
/*
* 2For High Power
*
* Return to highest data rate, if signal strength is good enough.
* SignalStrength threshold(-50dbm) is for RTL8186.
* Revise SignalStrength threshold to -51dbm.
*/
/* Also need to check retry rate for safety, by Bruce, 2007-06-05. */
if (priv->CurrentOperaRate != priv->ieee80211->current_network.HighestOperaRate) {
bTryUp = true;
/* Upgrade Tx Rate directly. */
priv->TryupingCount += TryUpTh;
}
} else if (CurrTxokCnt > 9 && CurrTxokCnt < 100 && CurrRetryRate >= 600) {
/*
*2 For Serious Retry
*
* Traffic is not busy but our Tx retry is serious.
*/
bTryDown = true;
/* Let Rate Mechanism to degrade tx rate directly. */
priv->TryDownCountLowData += TryDownTh;
} else if (priv->CurrentOperaRate == 108) {
/* 2For 54Mbps */
/* Air Link */
if ((CurrRetryRate > 26) && (priv->LastRetryRate > 25)) {
bTryDown = true;
}
/* Cable Link */
else if ((CurrRetryRate > 17) && (priv->LastRetryRate > 16) && (CurrSignalStrength > -72)) {
bTryDown = true;
}
if (bTryDown && (CurrSignalStrength < -75)) /* cable link */
priv->TryDownCountLowData += TryDownTh;
} else if (priv->CurrentOperaRate == 96) {
/* 2For 48Mbps */
/* Air Link */
if (((CurrRetryRate > 48) && (priv->LastRetryRate > 47))) {
bTryDown = true;
} else if (((CurrRetryRate > 21) && (priv->LastRetryRate > 20)) && (CurrSignalStrength > -74)) { /* Cable Link */
/* Down to rate 36Mbps. */
bTryDown = true;
} else if ((CurrRetryRate > (priv->LastRetryRate + 50)) && (priv->FailTxRateCount > 2)) {
bTryDown = true;
priv->TryDownCountLowData += TryDownTh;
} else if ((CurrRetryRate < 8) && (priv->LastRetryRate < 8)) { /* TO DO: need to consider (RSSI) */
bTryUp = true;
}
if (bTryDown && (CurrSignalStrength < -75)) {
priv->TryDownCountLowData += TryDownTh;
}
} else if (priv->CurrentOperaRate == 72) {
/* 2For 36Mbps */
if ((CurrRetryRate > 43) && (priv->LastRetryRate > 41)) {
/* Down to rate 24Mbps. */
bTryDown = true;
} else if ((CurrRetryRate > (priv->LastRetryRate + 50)) && (priv->FailTxRateCount > 2)) {
bTryDown = true;
priv->TryDownCountLowData += TryDownTh;
} else if ((CurrRetryRate < 15) && (priv->LastRetryRate < 16)) { /* TO DO: need to consider (RSSI) */
bTryUp = true;
}
if (bTryDown && (CurrSignalStrength < -80))
priv->TryDownCountLowData += TryDownTh;
} else if (priv->CurrentOperaRate == 48) {
/* 2For 24Mbps */
/* Air Link */
if (((CurrRetryRate > 63) && (priv->LastRetryRate > 62))) {
bTryDown = true;
} else if (((CurrRetryRate > 33) && (priv->LastRetryRate > 32)) && (CurrSignalStrength > -82)) { /* Cable Link */
bTryDown = true;
} else if ((CurrRetryRate > (priv->LastRetryRate + 50)) && (priv->FailTxRateCount > 2)) {
bTryDown = true;
priv->TryDownCountLowData += TryDownTh;
} else if ((CurrRetryRate < 20) && (priv->LastRetryRate < 21)) { /* TO DO: need to consider (RSSI) */
bTryUp = true;
}
if (bTryDown && (CurrSignalStrength < -82))
priv->TryDownCountLowData += TryDownTh;
} else if (priv->CurrentOperaRate == 36) {
if (((CurrRetryRate > 85) && (priv->LastRetryRate > 86))) {
bTryDown = true;
} else if ((CurrRetryRate > (priv->LastRetryRate + 50)) && (priv->FailTxRateCount > 2)) {
bTryDown = true;
priv->TryDownCountLowData += TryDownTh;
} else if ((CurrRetryRate < 22) && (priv->LastRetryRate < 23)) { /* TO DO: need to consider (RSSI) */
bTryUp = true;
}
} else if (priv->CurrentOperaRate == 22) {
/* 2For 11Mbps */
if (CurrRetryRate > 95) {
bTryDown = true;
} else if ((CurrRetryRate < 29) && (priv->LastRetryRate < 30)) { /*TO DO: need to consider (RSSI) */
bTryUp = true;
}
} else if (priv->CurrentOperaRate == 11) {
/* 2For 5.5Mbps */
if (CurrRetryRate > 149) {
bTryDown = true;
} else if ((CurrRetryRate < 60) && (priv->LastRetryRate < 65)) {
bTryUp = true;
}
} else if (priv->CurrentOperaRate == 4) {
/* 2For 2 Mbps */
if ((CurrRetryRate > 99) && (priv->LastRetryRate > 99)) {
bTryDown = true;
} else if ((CurrRetryRate < 65) && (priv->LastRetryRate < 70)) {
bTryUp = true;
}
} else if (priv->CurrentOperaRate == 2) {
/* 2For 1 Mbps */
if ((CurrRetryRate < 70) && (priv->LastRetryRate < 75)) {
bTryUp = true;
}
}
if (bTryUp && bTryDown)
printk("StaRateAdaptive87B(): Tx Rate tried upping and downing simultaneously!\n");
/* 1 Test Upgrading Tx Rate
* Sometimes the cause of the low throughput (high retry rate) is the compatibility between the AP and NIC.
* To test if the upper rate may cause lower retry rate, this mechanism randomly occurs to test upgrading tx rate.
*/
if (!bTryUp && !bTryDown && (priv->TryupingCount == 0) && (priv->TryDownCountLowData == 0)
&& priv->CurrentOperaRate != priv->ieee80211->current_network.HighestOperaRate && priv->FailTxRateCount < 2) {
if (jiffies % (CurrRetryRate + 101) == 0) {
bTryUp = true;
priv->bTryuping = true;
}
}
/* 1 Rate Mechanism */
if (bTryUp) {
priv->TryupingCount++;
priv->TryDownCountLowData = 0;
/*
* Check more times if we need to upgrade indeed.
* Because the largest value of pHalData->TryupingCount is 0xFFFF and
* the largest value of pHalData->FailTxRateCount is 0x14,
* this condition will be satisfied at most every 2 min.
*/
if ((priv->TryupingCount > (TryUpTh + priv->FailTxRateCount * priv->FailTxRateCount)) ||
(CurrSignalStrength > priv->LastFailTxRateSS) || priv->bTryuping) {
priv->TryupingCount = 0;
/*
* When transferring from CCK to OFDM, DIG is an important issue.
*/
if (priv->CurrentOperaRate == 22)
bUpdateInitialGain = true;
/*
* The difference in throughput between 48Mbps and 36Mbps is 8M.
* So, we must be careful in this rate scale. Isaiah 2008-02-15.
*/
if (((priv->CurrentOperaRate == 72) || (priv->CurrentOperaRate == 48) || (priv->CurrentOperaRate == 36)) &&
(priv->FailTxRateCount > 2))
priv->RateAdaptivePeriod = (RATE_ADAPTIVE_TIMER_PERIOD / 2);
/* (1)To avoid upgrade frequently to the fail tx rate, add the FailTxRateCount into the threshold. */
/* (2)If the signal strength is increased, it may be able to upgrade. */
priv->CurrentOperaRate = GetUpgradeTxRate(dev, priv->CurrentOperaRate);
if (priv->CurrentOperaRate == 36) {
priv->bUpdateARFR = true;
write_nic_word(dev, ARFR, 0x0F8F); /* bypass 12/9/6 */
} else if (priv->bUpdateARFR) {
priv->bUpdateARFR = false;
write_nic_word(dev, ARFR, 0x0FFF); /* set 1M ~ 54Mbps. */
}
/* Update Fail Tx rate and count. */
if (priv->LastFailTxRate != priv->CurrentOperaRate) {
priv->LastFailTxRate = priv->CurrentOperaRate;
priv->FailTxRateCount = 0;
priv->LastFailTxRateSS = -200; /* Set lowest power. */
}
}
} else {
if (priv->TryupingCount > 0)
priv->TryupingCount--;
}
if (bTryDown) {
priv->TryDownCountLowData++;
priv->TryupingCount = 0;
/* Check if Tx rate can be degraded or Test trying upgrading should fallback. */
if (priv->TryDownCountLowData > TryDownTh || priv->bTryuping) {
priv->TryDownCountLowData = 0;
priv->bTryuping = false;
/* Update fail information. */
if (priv->LastFailTxRate == priv->CurrentOperaRate) {
priv->FailTxRateCount++;
/* Record the Tx fail rate signal strength. */
if (CurrSignalStrength > priv->LastFailTxRateSS)
priv->LastFailTxRateSS = CurrSignalStrength;
} else {
priv->LastFailTxRate = priv->CurrentOperaRate;
priv->FailTxRateCount = 1;
priv->LastFailTxRateSS = CurrSignalStrength;
}
priv->CurrentOperaRate = GetDegradeTxRate(dev, priv->CurrentOperaRate);
/* Reduce chariot training time at weak signal strength situation. SD3 ED demand. */
if ((CurrSignalStrength < -80) && (priv->CurrentOperaRate > 72)) {
priv->CurrentOperaRate = 72;
}
if (priv->CurrentOperaRate == 36) {
priv->bUpdateARFR = true;
write_nic_word(dev, ARFR, 0x0F8F); /* bypass 12/9/6 */
} else if (priv->bUpdateARFR) {
priv->bUpdateARFR = false;
write_nic_word(dev, ARFR, 0x0FFF); /* set 1M ~ 54Mbps. */
}
/*
* When it is CCK rate, it may need to update initial gain to receive lower power packets.
*/
if (MgntIsCckRate(priv->CurrentOperaRate)) {
bUpdateInitialGain = true;
}
}
} else {
if (priv->TryDownCountLowData > 0)
priv->TryDownCountLowData--;
}
/*
* Keep the Tx fail rate count to equal to 0x15 at most.
* Reduce the fail count at least to 10 sec if tx rate is tending stable.
*/
if (priv->FailTxRateCount >= 0x15 ||
(!bTryUp && !bTryDown && priv->TryDownCountLowData == 0 && priv->TryupingCount && priv->FailTxRateCount > 0x6)) {
priv->FailTxRateCount--;
}
OfdmTxPwrIdx = priv->chtxpwr_ofdm[priv->ieee80211->current_network.channel];
CckTxPwrIdx = priv->chtxpwr[priv->ieee80211->current_network.channel];
/* Mac0x9e increase 2 level in 36M~18M situation */
if ((priv->CurrentOperaRate < 96) && (priv->CurrentOperaRate > 22)) {
u1bCck = read_nic_byte(dev, CCK_TXAGC);
u1bOfdm = read_nic_byte(dev, OFDM_TXAGC);
/* case 1: Never enter High power */
if (u1bCck == CckTxPwrIdx) {
if (u1bOfdm != (OfdmTxPwrIdx + 2)) {
priv->bEnhanceTxPwr = true;
u1bOfdm = ((u1bOfdm + 2) > 35) ? 35 : (u1bOfdm + 2);
write_nic_byte(dev, OFDM_TXAGC, u1bOfdm);
}
} else if (u1bCck < CckTxPwrIdx) {
/* case 2: enter high power */
if (!priv->bEnhanceTxPwr) {
priv->bEnhanceTxPwr = true;
u1bOfdm = ((u1bOfdm + 2) > 35) ? 35 : (u1bOfdm + 2);
write_nic_byte(dev, OFDM_TXAGC, u1bOfdm);
}
}
} else if (priv->bEnhanceTxPwr) { /* 54/48/11/5.5/2/1 */
u1bCck = read_nic_byte(dev, CCK_TXAGC);
u1bOfdm = read_nic_byte(dev, OFDM_TXAGC);
/* case 1: Never enter High power */
if (u1bCck == CckTxPwrIdx) {
priv->bEnhanceTxPwr = false;
write_nic_byte(dev, OFDM_TXAGC, OfdmTxPwrIdx);
}
/* case 2: enter high power */
else if (u1bCck < CckTxPwrIdx) {
priv->bEnhanceTxPwr = false;
u1bOfdm = ((u1bOfdm - 2) > 0) ? (u1bOfdm - 2) : 0;
write_nic_byte(dev, OFDM_TXAGC, u1bOfdm);
}
}
/*
* We need update initial gain when we set tx rate "from OFDM to CCK" or
* "from CCK to OFDM".
*/
SetInitialGain:
if (bUpdateInitialGain) {
if (MgntIsCckRate(priv->CurrentOperaRate)) { /* CCK */
if (priv->InitialGain > priv->RegBModeGainStage) {
priv->InitialGainBackUp = priv->InitialGain;
if (CurrSignalStrength < -85) /* Low power, OFDM [0x17] = 26. */
/* SD3 SYs suggest that CurrSignalStrength < -65, ofdm 0x17=26. */
priv->InitialGain = priv->RegBModeGainStage;
else if (priv->InitialGain > priv->RegBModeGainStage + 1)
priv->InitialGain -= 2;
else
priv->InitialGain--;
printk("StaRateAdaptive87SE(): update init_gain to index %d for date rate %d\n", priv->InitialGain, priv->CurrentOperaRate);
UpdateInitialGain(dev);
}
} else { /* OFDM */
if (priv->InitialGain < 4) {
priv->InitialGainBackUp = priv->InitialGain;
priv->InitialGain++;
printk("StaRateAdaptive87SE(): update init_gain to index %d for date rate %d\n", priv->InitialGain, priv->CurrentOperaRate);
UpdateInitialGain(dev);
}
}
}
/* Record the related info */
priv->LastRetryRate = CurrRetryRate;
priv->LastTxThroughput = TxThroughput;
priv->ieee80211->rate = priv->CurrentOperaRate * 5;
}
void StaRateAdaptive87SE(struct net_device *dev)
{
struct r8180_priv *priv = (struct r8180_priv *)ieee80211_priv(dev);
unsigned long CurrTxokCnt;
u16 CurrRetryCnt;
u16 CurrRetryRate;
unsigned long CurrRxokCnt;
bool bTryUp = false;
bool bTryDown = false;
u8 TryUpTh = 1;
u8 TryDownTh = 2;
u32 TxThroughput;
long CurrSignalStrength;
bool bUpdateInitialGain = false;
u8 u1bOfdm = 0, u1bCck = 0;
char OfdmTxPwrIdx, CckTxPwrIdx;
priv->RateAdaptivePeriod = RATE_ADAPTIVE_TIMER_PERIOD;
CurrRetryCnt = priv->CurrRetryCnt;
CurrTxokCnt = priv->NumTxOkTotal - priv->LastTxokCnt;
CurrRxokCnt = priv->ieee80211->NumRxOkTotal - priv->LastRxokCnt;
CurrSignalStrength = priv->Stats_RecvSignalPower;
TxThroughput = (u32)(priv->NumTxOkBytesTotal - priv->LastTxOKBytes);
priv->LastTxOKBytes = priv->NumTxOkBytesTotal;
priv->CurrentOperaRate = priv->ieee80211->rate / 5;
if (CurrTxokCnt > 0) {
CurrRetryRate = (u16)(CurrRetryCnt * 100 / CurrTxokCnt);
} else {
CurrRetryRate = (u16)(CurrRetryCnt * 100 / 1);
}
priv->LastRetryCnt = priv->CurrRetryCnt;
priv->LastTxokCnt = priv->NumTxOkTotal;
priv->LastRxokCnt = priv->ieee80211->NumRxOkTotal;
priv->CurrRetryCnt = 0;
if (CurrRetryRate == 0 && CurrTxokCnt == 0) {
priv->TryupingCountNoData++;
if (priv->TryupingCountNoData > 30) {
priv->TryupingCountNoData = 0;
priv->CurrentOperaRate = GetUpgradeTxRate(dev, priv->CurrentOperaRate);
priv->LastFailTxRate = 0;
priv->LastFailTxRateSS = -200;
priv->FailTxRateCount = 0;
}
goto SetInitialGain;
} else {
priv->TryupingCountNoData = 0;
}
if (priv->CurrentOperaRate == 22 || priv->CurrentOperaRate == 72)
TryUpTh += 9;
if (MgntIsCckRate(priv->CurrentOperaRate) || priv->CurrentOperaRate == 36)
TryDownTh += 1;
if (priv->bTryuping == true) {
if ((CurrRetryRate > 25) && TxThroughput < priv->LastTxThroughput) {
bTryDown = true;
} else {
priv->bTryuping = false;
}
} else if (CurrSignalStrength > -47 && (CurrRetryRate < 50)) {
if (priv->CurrentOperaRate != priv->ieee80211->current_network.HighestOperaRate) {
bTryUp = true;
priv->TryupingCount += TryUpTh;
}
} else if (CurrTxokCnt > 9 && CurrTxokCnt < 100 && CurrRetryRate >= 600) {
bTryDown = true;
priv->TryDownCountLowData += TryDownTh;
} else if (priv->CurrentOperaRate == 108) {
if ((CurrRetryRate > 26) && (priv->LastRetryRate > 25)) {
bTryDown = true;
}
else if ((CurrRetryRate > 17) && (priv->LastRetryRate > 16) && (CurrSignalStrength > -72)) {
bTryDown = true;
}
if (bTryDown && (CurrSignalStrength < -75))
priv->TryDownCountLowData += TryDownTh;
}
else if (priv->CurrentOperaRate == 96) {
if (((CurrRetryRate > 48) && (priv->LastRetryRate > 47))) {
bTryDown = true;
} else if (((CurrRetryRate > 21) && (priv->LastRetryRate > 20)) && (CurrSignalStrength > -74)) {
bTryDown = true;
} else if ((CurrRetryRate > (priv->LastRetryRate + 50)) && (priv->FailTxRateCount > 2)) {
bTryDown = true;
priv->TryDownCountLowData += TryDownTh;
} else if ((CurrRetryRate < 8) && (priv->LastRetryRate < 8)) {
bTryUp = true;
}
if (bTryDown && (CurrSignalStrength < -75)){
priv->TryDownCountLowData += TryDownTh;
}
} else if (priv->CurrentOperaRate == 72) {
if ((CurrRetryRate > 43) && (priv->LastRetryRate > 41)) {
bTryDown = true;
} else if ((CurrRetryRate > (priv->LastRetryRate + 50)) && (priv->FailTxRateCount > 2)) {
bTryDown = true;
priv->TryDownCountLowData += TryDownTh;
} else if ((CurrRetryRate < 15) && (priv->LastRetryRate < 16)) {
bTryUp = true;
}
if (bTryDown && (CurrSignalStrength < -80))
priv->TryDownCountLowData += TryDownTh;
} else if (priv->CurrentOperaRate == 48) {
if (((CurrRetryRate > 63) && (priv->LastRetryRate > 62))) {
bTryDown = true;
} else if (((CurrRetryRate > 33) && (priv->LastRetryRate > 32)) && (CurrSignalStrength > -82)) {
bTryDown = true;
} else if ((CurrRetryRate > (priv->LastRetryRate + 50)) && (priv->FailTxRateCount > 2 )) {
bTryDown = true;
priv->TryDownCountLowData += TryDownTh;
} else if ((CurrRetryRate < 20) && (priv->LastRetryRate < 21)) {
bTryUp = true;
}
if (bTryDown && (CurrSignalStrength < -82))
priv->TryDownCountLowData += TryDownTh;
} else if (priv->CurrentOperaRate == 36) {
if (((CurrRetryRate > 85) && (priv->LastRetryRate > 86))) {
bTryDown = true;
} else if ((CurrRetryRate > (priv->LastRetryRate + 50)) && (priv->FailTxRateCount > 2)) {
bTryDown = true;
priv->TryDownCountLowData += TryDownTh;
} else if ((CurrRetryRate < 22) && (priv->LastRetryRate < 23)) {
bTryUp = true;
}
} else if (priv->CurrentOperaRate == 22) {
if (CurrRetryRate > 95) {
bTryDown = true;
}
else if ((CurrRetryRate < 29) && (priv->LastRetryRate < 30)) {
bTryUp = true;
}
} else if (priv->CurrentOperaRate == 11) {
if (CurrRetryRate > 149) {
bTryDown = true;
} else if ((CurrRetryRate < 60) && (priv->LastRetryRate < 65)) {
bTryUp = true;
}
} else if (priv->CurrentOperaRate == 4) {
if ((CurrRetryRate > 99) && (priv->LastRetryRate > 99)) {
bTryDown = true;
} else if ((CurrRetryRate < 65) && (priv->LastRetryRate < 70)) {
bTryUp = true;
}
} else if (priv->CurrentOperaRate == 2) {
if ((CurrRetryRate < 70) && (priv->LastRetryRate < 75)) {
bTryUp = true;
}
}
if (bTryUp && bTryDown)
printk("StaRateAdaptive87B(): Tx Rate tried upping and downing simultaneously!\n");
if (!bTryUp && !bTryDown && (priv->TryupingCount == 0) && (priv->TryDownCountLowData == 0)
&& priv->CurrentOperaRate != priv->ieee80211->current_network.HighestOperaRate && priv->FailTxRateCount < 2) {
if (jiffies % (CurrRetryRate + 101) == 0) {
bTryUp = true;
priv->bTryuping = true;
}
}
if (bTryUp) {
priv->TryupingCount++;
priv->TryDownCountLowData = 0;
if ((priv->TryupingCount > (TryUpTh + priv->FailTxRateCount * priv->FailTxRateCount)) ||
(CurrSignalStrength > priv->LastFailTxRateSS) || priv->bTryuping) {
priv->TryupingCount = 0;
if (priv->CurrentOperaRate == 22)
bUpdateInitialGain = true;
if (((priv->CurrentOperaRate == 72) || (priv->CurrentOperaRate == 48) || (priv->CurrentOperaRate == 36)) &&
(priv->FailTxRateCount > 2))
priv->RateAdaptivePeriod = (RATE_ADAPTIVE_TIMER_PERIOD / 2);
priv->CurrentOperaRate = GetUpgradeTxRate(dev, priv->CurrentOperaRate);
if (priv->CurrentOperaRate == 36) {
priv->bUpdateARFR = true;
write_nic_word(dev, ARFR, 0x0F8F);
} else if(priv->bUpdateARFR) {
priv->bUpdateARFR = false;
write_nic_word(dev, ARFR, 0x0FFF);
}
if (priv->LastFailTxRate != priv->CurrentOperaRate) {
priv->LastFailTxRate = priv->CurrentOperaRate;
priv->FailTxRateCount = 0;
priv->LastFailTxRateSS = -200;
}
}
} else {
if (priv->TryupingCount > 0)
priv->TryupingCount --;
}
if (bTryDown) {
priv->TryDownCountLowData++;
priv->TryupingCount = 0;
if (priv->TryDownCountLowData > TryDownTh || priv->bTryuping) {
priv->TryDownCountLowData = 0;
priv->bTryuping = false;
if (priv->LastFailTxRate == priv->CurrentOperaRate) {
priv->FailTxRateCount++;
if (CurrSignalStrength > priv->LastFailTxRateSS)
priv->LastFailTxRateSS = CurrSignalStrength;
} else {
priv->LastFailTxRate = priv->CurrentOperaRate;
priv->FailTxRateCount = 1;
priv->LastFailTxRateSS = CurrSignalStrength;
}
priv->CurrentOperaRate = GetDegradeTxRate(dev, priv->CurrentOperaRate);
if ((CurrSignalStrength < -80) && (priv->CurrentOperaRate > 72 )) {
priv->CurrentOperaRate = 72;
}
if (priv->CurrentOperaRate == 36) {
priv->bUpdateARFR = true;
write_nic_word(dev, ARFR, 0x0F8F);
} else if (priv->bUpdateARFR) {
priv->bUpdateARFR = false;
write_nic_word(dev, ARFR, 0x0FFF);
}
if (MgntIsCckRate(priv->CurrentOperaRate)) {
bUpdateInitialGain = true;
}
}
} else {
if (priv->TryDownCountLowData > 0)
priv->TryDownCountLowData--;
}
if (priv->FailTxRateCount >= 0x15 ||
(!bTryUp && !bTryDown && priv->TryDownCountLowData == 0 && priv->TryupingCount && priv->FailTxRateCount > 0x6)) {
priv->FailTxRateCount--;
}
OfdmTxPwrIdx = priv->chtxpwr_ofdm[priv->ieee80211->current_network.channel];
CckTxPwrIdx = priv->chtxpwr[priv->ieee80211->current_network.channel];
if ((priv->CurrentOperaRate < 96) && (priv->CurrentOperaRate > 22)) {
u1bCck = read_nic_byte(dev, CCK_TXAGC);
u1bOfdm = read_nic_byte(dev, OFDM_TXAGC);
if (u1bCck == CckTxPwrIdx) {
if (u1bOfdm != (OfdmTxPwrIdx + 2)) {
priv->bEnhanceTxPwr = true;
u1bOfdm = ((u1bOfdm + 2) > 35) ? 35: (u1bOfdm + 2);
write_nic_byte(dev, OFDM_TXAGC, u1bOfdm);
}
} else if (u1bCck < CckTxPwrIdx) {
if (!priv->bEnhanceTxPwr) {
priv->bEnhanceTxPwr = true;
u1bOfdm = ((u1bOfdm + 2) > 35) ? 35: (u1bOfdm + 2);
write_nic_byte(dev, OFDM_TXAGC, u1bOfdm);
}
}
} else if (priv->bEnhanceTxPwr) {
u1bCck = read_nic_byte(dev, CCK_TXAGC);
u1bOfdm = read_nic_byte(dev, OFDM_TXAGC);
if (u1bCck == CckTxPwrIdx) {
priv->bEnhanceTxPwr = false;
write_nic_byte(dev, OFDM_TXAGC, OfdmTxPwrIdx);
}
else if (u1bCck < CckTxPwrIdx) {
priv->bEnhanceTxPwr = false;
u1bOfdm = ((u1bOfdm - 2) > 0) ? (u1bOfdm - 2): 0;
write_nic_byte(dev, OFDM_TXAGC, u1bOfdm);
}
}
SetInitialGain:
if (bUpdateInitialGain) {
if (MgntIsCckRate(priv->CurrentOperaRate)) {
if (priv->InitialGain > priv->RegBModeGainStage) {
priv->InitialGainBackUp = priv->InitialGain;
if (CurrSignalStrength < -85)
priv->InitialGain = priv->RegBModeGainStage;
else if (priv->InitialGain > priv->RegBModeGainStage + 1)
priv->InitialGain -= 2;
else
priv->InitialGain--;
printk("StaRateAdaptive87SE(): update init_gain to index %d for date rate %d\n",priv->InitialGain, priv->CurrentOperaRate);
UpdateInitialGain(dev);
}
} else {
if (priv->InitialGain < 4) {
priv->InitialGainBackUp = priv->InitialGain;
priv->InitialGain++;
printk("StaRateAdaptive87SE(): update init_gain to index %d for date rate %d\n",priv->InitialGain, priv->CurrentOperaRate);
UpdateInitialGain(dev);
}
}
}
priv->LastRetryRate = CurrRetryRate;
priv->LastTxThroughput = TxThroughput;
priv->ieee80211->rate = priv->CurrentOperaRate * 5;
}
void
StaRateAdaptive87SE(
struct net_device *dev
)
{
struct r8180_priv *priv = (struct r8180_priv *)ieee80211_priv(dev);
unsigned long CurrTxokCnt;
u16 CurrRetryCnt;
u16 CurrRetryRate;
//u16 i,idx;
unsigned long CurrRxokCnt;
bool bTryUp = false;
bool bTryDown = false;
u8 TryUpTh = 1;
u8 TryDownTh = 2;
u32 TxThroughput;
long CurrSignalStrength;
bool bUpdateInitialGain = false;
u8 u1bOfdm=0, u1bCck = 0;
char OfdmTxPwrIdx, CckTxPwrIdx;
priv->RateAdaptivePeriod= RATE_ADAPTIVE_TIMER_PERIOD;
CurrRetryCnt = priv->CurrRetryCnt;
CurrTxokCnt = priv->NumTxOkTotal - priv->LastTxokCnt;
CurrRxokCnt = priv->ieee80211->NumRxOkTotal - priv->LastRxokCnt;
CurrSignalStrength = priv->Stats_RecvSignalPower;
TxThroughput = (u32)(priv->NumTxOkBytesTotal - priv->LastTxOKBytes);
priv->LastTxOKBytes = priv->NumTxOkBytesTotal;
priv->CurrentOperaRate = priv->ieee80211->rate/5;
//printk("priv->CurrentOperaRate is %d\n",priv->CurrentOperaRate);
//2 Compute retry ratio.
if (CurrTxokCnt>0)
{
CurrRetryRate = (u16)(CurrRetryCnt*100/CurrTxokCnt);
}
else
{ // It may be serious retry. To distinguish serious retry or no packets modified by Bruce
CurrRetryRate = (u16)(CurrRetryCnt*100/1);
}
//
// Added by Roger, 2007.01.02.
// For debug information.
//
//printk("\n(1) pHalData->LastRetryRate: %d \n",priv->LastRetryRate);
//printk("(2) RetryCnt = %d \n", CurrRetryCnt);
//printk("(3) TxokCnt = %d \n", CurrTxokCnt);
//printk("(4) CurrRetryRate = %d \n", CurrRetryRate);
//printk("(5) CurrSignalStrength = %d \n",CurrSignalStrength);
//printk("(6) TxThroughput is %d\n",TxThroughput);
//printk("priv->NumTxOkBytesTotal is %d\n",priv->NumTxOkBytesTotal);
priv->LastRetryCnt = priv->CurrRetryCnt;
priv->LastTxokCnt = priv->NumTxOkTotal;
priv->LastRxokCnt = priv->ieee80211->NumRxOkTotal;
priv->CurrRetryCnt = 0;
//2No Tx packets, return to init_rate or not?
if (CurrRetryRate==0 && CurrTxokCnt == 0)
{
//
//After 9 (30*300ms) seconds in this condition, we try to raise rate.
//
priv->TryupingCountNoData++;
// printk("No Tx packets, TryupingCountNoData(%d)\n", priv->TryupingCountNoData);
//[TRC Dell Lab] Extend raised period from 4.5sec to 9sec, Isaiah 2008-02-15 18:00
if (priv->TryupingCountNoData>30)
{
priv->TryupingCountNoData = 0;
priv->CurrentOperaRate = GetUpgradeTxRate(dev, priv->CurrentOperaRate);
// Reset Fail Record
priv->LastFailTxRate = 0;
priv->LastFailTxRateSS = -200;
priv->FailTxRateCount = 0;
}
goto SetInitialGain;
}
else
{
priv->TryupingCountNoData=0; //Reset trying up times.
}
//
// For Netgear case, I comment out the following signal strength estimation,
// which can results in lower rate to transmit when sample is NOT enough (e.g. PING request).
// 2007.04.09, by Roger.
//
//
// Restructure rate adaptive as the following main stages:
// (1) Add retry threshold in 54M upgrading condition with signal strength.
// (2) Add the mechanism to degrade to CCK rate according to signal strength
// and retry rate.
// (3) Remove all Initial Gain Updates over OFDM rate. To avoid the complicated
// situation, Initial Gain Update is upon on DIG mechanism except CCK rate.
// (4) Add the mehanism of trying to upgrade tx rate.
// (5) Record the information of upping tx rate to avoid trying upping tx rate constantly.
// By Bruce, 2007-06-05.
//
//
// 11Mbps or 36Mbps
// Check more times in these rate(key rates).
//
if(priv->CurrentOperaRate == 22 || priv->CurrentOperaRate == 72)
{
TryUpTh += 9;
}
//
// Let these rates down more difficult.
//
if(MgntIsCckRate(priv->CurrentOperaRate) || priv->CurrentOperaRate == 36)
{
TryDownTh += 1;
}
//1 Adjust Rate.
if (priv->bTryuping == true)
{
//2 For Test Upgrading mechanism
// Note:
// Sometimes the throughput is upon on the capability bwtween the AP and NIC,
// thus the low data rate does not improve the performance.
// We randomly upgrade the data rate and check if the retry rate is improved.
// Upgrading rate did not improve the retry rate, fallback to the original rate.
if ( (CurrRetryRate > 25) && TxThroughput < priv->LastTxThroughput)
{
//Not necessary raising rate, fall back rate.
bTryDown = true;
//printk("case1-1: Not necessary raising rate, fall back rate....\n");
//printk("case1-1: pMgntInfo->CurrentOperaRate =%d, TxThroughput = %d, LastThroughput = %d\n",
// priv->CurrentOperaRate, TxThroughput, priv->LastTxThroughput);
}
else
{
priv->bTryuping = false;
}
}
else if (CurrSignalStrength > -47 && (CurrRetryRate < 50))
{
//2For High Power
//
// Added by Roger, 2007.04.09.
// Return to highest data rate, if signal strength is good enough.
// SignalStrength threshold(-50dbm) is for RTL8186.
// Revise SignalStrength threshold to -51dbm.
//
// Also need to check retry rate for safety, by Bruce, 2007-06-05.
if(priv->CurrentOperaRate != priv->ieee80211->current_network.HighestOperaRate )
{
bTryUp = true;
// Upgrade Tx Rate directly.
priv->TryupingCount += TryUpTh;
}
// printk("case2: StaRateAdaptive87SE: Power(%d) is high enough!!. \n", CurrSignalStrength);
}
else if(CurrTxokCnt > 9 && CurrTxokCnt< 100 && CurrRetryRate >= 600)
{
//2 For Serious Retry
//
// Traffic is not busy but our Tx retry is serious.
//
bTryDown = true;
// Let Rate Mechanism to degrade tx rate directly.
priv->TryDownCountLowData += TryDownTh;
// printk("case3: RA: Tx Retry is serious. Degrade Tx Rate to %d directly...\n", priv->CurrentOperaRate);
}
else if ( priv->CurrentOperaRate == 108 )
{
//2For 54Mbps
// Air Link
if ( (CurrRetryRate>26)&&(priv->LastRetryRate>25))
// if ( (CurrRetryRate>40)&&(priv->LastRetryRate>39))
{
//Down to rate 48Mbps.
bTryDown = true;
}
// Cable Link
else if ( (CurrRetryRate>17)&&(priv->LastRetryRate>16) && (CurrSignalStrength > -72))
// else if ( (CurrRetryRate>17)&&(priv->LastRetryRate>16) && (CurrSignalStrength > -72))
{
//Down to rate 48Mbps.
bTryDown = true;
}
if(bTryDown && (CurrSignalStrength < -75)) //cable link
{
priv->TryDownCountLowData += TryDownTh;
}
//printk("case4---54M \n");
}
else if ( priv->CurrentOperaRate == 96 )
{
//2For 48Mbps
//Air Link
if ( ((CurrRetryRate>48) && (priv->LastRetryRate>47)))
// if ( ((CurrRetryRate>65) && (priv->LastRetryRate>64)))
{
//Down to rate 36Mbps.
bTryDown = true;
}
//Cable Link
else if ( ((CurrRetryRate>21) && (priv->LastRetryRate>20)) && (CurrSignalStrength > -74))
{
//Down to rate 36Mbps.
bTryDown = true;
}
else if((CurrRetryRate> (priv->LastRetryRate + 50 )) && (priv->FailTxRateCount >2 ))
// else if((CurrRetryRate> (priv->LastRetryRate + 70 )) && (priv->FailTxRateCount >2 ))
{
bTryDown = true;
priv->TryDownCountLowData += TryDownTh;
}
else if ( (CurrRetryRate<8) && (priv->LastRetryRate<8) ) //TO DO: need to consider (RSSI)
// else if ( (CurrRetryRate<28) && (priv->LastRetryRate<8) )
{
bTryUp = true;
}
if(bTryDown && (CurrSignalStrength < -75))
{
priv->TryDownCountLowData += TryDownTh;
}
//printk("case5---48M \n");
}
else if ( priv->CurrentOperaRate == 72 )
{
//2For 36Mbps
if ( (CurrRetryRate>43) && (priv->LastRetryRate>41))
// if ( (CurrRetryRate>60) && (priv->LastRetryRate>59))
{
//Down to rate 24Mbps.
bTryDown = true;
}
else if((CurrRetryRate> (priv->LastRetryRate + 50 )) && (priv->FailTxRateCount >2 ))
// else if((CurrRetryRate> (priv->LastRetryRate + 70 )) && (priv->FailTxRateCount >2 ))
{
bTryDown = true;
priv->TryDownCountLowData += TryDownTh;
}
else if ( (CurrRetryRate<15) && (priv->LastRetryRate<16)) //TO DO: need to consider (RSSI)
// else if ( (CurrRetryRate<35) && (priv->LastRetryRate<36))
{
bTryUp = true;
}
if(bTryDown && (CurrSignalStrength < -80))
{
priv->TryDownCountLowData += TryDownTh;
}
//printk("case6---36M \n");
}
else if ( priv->CurrentOperaRate == 48 )
{
//2For 24Mbps
// Air Link
if ( ((CurrRetryRate>63) && (priv->LastRetryRate>62)))
// if ( ((CurrRetryRate>83) && (priv->LastRetryRate>82)))
{
//Down to rate 18Mbps.
bTryDown = true;
}
//Cable Link
else if ( ((CurrRetryRate>33) && (priv->LastRetryRate>32)) && (CurrSignalStrength > -82) )
// else if ( ((CurrRetryRate>50) && (priv->LastRetryRate>49)) && (CurrSignalStrength > -82) )
{
//Down to rate 18Mbps.
bTryDown = true;
}
else if((CurrRetryRate> (priv->LastRetryRate + 50 )) && (priv->FailTxRateCount >2 ))
// else if((CurrRetryRate> (priv->LastRetryRate + 70 )) && (priv->FailTxRateCount >2 ))
{
bTryDown = true;
priv->TryDownCountLowData += TryDownTh;
}
else if ( (CurrRetryRate<20) && (priv->LastRetryRate<21)) //TO DO: need to consider (RSSI)
// else if ( (CurrRetryRate<40) && (priv->LastRetryRate<41))
{
bTryUp = true;
}
if(bTryDown && (CurrSignalStrength < -82))
{
priv->TryDownCountLowData += TryDownTh;
}
//printk("case7---24M \n");
}
else if ( priv->CurrentOperaRate == 36 )
{
//2For 18Mbps
// original (109, 109)
//[TRC Dell Lab] (90, 91), Isaiah 2008-02-18 23:24
// (85, 86), Isaiah 2008-02-18 24:00
if ( ((CurrRetryRate>85) && (priv->LastRetryRate>86)))
// if ( ((CurrRetryRate>115) && (priv->LastRetryRate>116)))
{
//Down to rate 11Mbps.
bTryDown = true;
}
//[TRC Dell Lab] Isaiah 2008-02-18 23:24
else if((CurrRetryRate> (priv->LastRetryRate + 50 )) && (priv->FailTxRateCount >2 ))
// else if((CurrRetryRate> (priv->LastRetryRate + 70 )) && (priv->FailTxRateCount >2 ))
{
bTryDown = true;
priv->TryDownCountLowData += TryDownTh;
}
else if ( (CurrRetryRate<22) && (priv->LastRetryRate<23)) //TO DO: need to consider (RSSI)
// else if ( (CurrRetryRate<42) && (priv->LastRetryRate<43))
{
bTryUp = true;
}
//printk("case8---18M \n");
}
else if ( priv->CurrentOperaRate == 22 )
{
//2For 11Mbps
if (CurrRetryRate>95)
// if (CurrRetryRate>155)
{
bTryDown = true;
}
else if ( (CurrRetryRate<29) && (priv->LastRetryRate <30) )//TO DO: need to consider (RSSI)
// else if ( (CurrRetryRate<49) && (priv->LastRetryRate <50) )
{
bTryUp = true;
}
//printk("case9---11M \n");
}
else if ( priv->CurrentOperaRate == 11 )
{
//2For 5.5Mbps
if (CurrRetryRate>149)
// if (CurrRetryRate>189)
{
bTryDown = true;
}
else if ( (CurrRetryRate<60) && (priv->LastRetryRate < 65))
// else if ( (CurrRetryRate<80) && (priv->LastRetryRate < 85))
{
bTryUp = true;
}
//printk("case10---5.5M \n");
}
else if ( priv->CurrentOperaRate == 4 )
{
//2For 2 Mbps
if((CurrRetryRate>99) && (priv->LastRetryRate>99))
// if((CurrRetryRate>199) && (priv->LastRetryRate>199))
{
bTryDown = true;
}
else if ( (CurrRetryRate < 65) && (priv->LastRetryRate < 70))
// else if ( (CurrRetryRate < 85) && (priv->LastRetryRate < 90))
{
bTryUp = true;
}
//printk("case11---2M \n");
}
else if ( priv->CurrentOperaRate == 2 )
{
//2For 1 Mbps
if( (CurrRetryRate<70) && (priv->LastRetryRate<75))
// if( (CurrRetryRate<90) && (priv->LastRetryRate<95))
{
bTryUp = true;
}
//printk("case12---1M \n");
}
if(bTryUp && bTryDown)
printk("StaRateAdaptive87B(): Tx Rate tried upping and downing simultaneously!\n");
//1 Test Upgrading Tx Rate
// Sometimes the cause of the low throughput (high retry rate) is the compatibility between the AP and NIC.
// To test if the upper rate may cause lower retry rate, this mechanism randomly occurs to test upgrading tx rate.
if(!bTryUp && !bTryDown && (priv->TryupingCount == 0) && (priv->TryDownCountLowData == 0)
&& priv->CurrentOperaRate != priv->ieee80211->current_network.HighestOperaRate && priv->FailTxRateCount < 2)
{
if(jiffies% (CurrRetryRate + 101) == 0)
{
bTryUp = true;
priv->bTryuping = true;
//printk("StaRateAdaptive87SE(): Randomly try upgrading...\n");
}
}
//1 Rate Mechanism
if(bTryUp)
{
priv->TryupingCount++;
priv->TryDownCountLowData = 0;
{
// printk("UP: pHalData->TryupingCount = %d\n", priv->TryupingCount);
// printk("UP: TryUpTh(%d)+ (FailTxRateCount(%d))^2 =%d\n",
// TryUpTh, priv->FailTxRateCount, (TryUpTh + priv->FailTxRateCount * priv->FailTxRateCount) );
// printk("UP: pHalData->bTryuping=%d\n", priv->bTryuping);
}
//
// Check more times if we need to upgrade indeed.
// Because the largest value of pHalData->TryupingCount is 0xFFFF and
// the largest value of pHalData->FailTxRateCount is 0x14,
// this condition will be satisfied at most every 2 min.
//
if((priv->TryupingCount > (TryUpTh + priv->FailTxRateCount * priv->FailTxRateCount)) ||
(CurrSignalStrength > priv->LastFailTxRateSS) || priv->bTryuping)
{
priv->TryupingCount = 0;
//
// When transferring from CCK to OFDM, DIG is an important issue.
//
if(priv->CurrentOperaRate == 22)
bUpdateInitialGain = true;
// The difference in throughput between 48Mbps and 36Mbps is 8M.
// So, we must be carefully in this rate scale. Isaiah 2008-02-15.
//
if( ((priv->CurrentOperaRate == 72) || (priv->CurrentOperaRate == 48) || (priv->CurrentOperaRate == 36)) &&
(priv->FailTxRateCount > 2) )
priv->RateAdaptivePeriod= (RATE_ADAPTIVE_TIMER_PERIOD/2);
// (1)To avoid upgrade frequently to the fail tx rate, add the FailTxRateCount into the threshold.
// (2)If the signal strength is increased, it may be able to upgrade.
priv->CurrentOperaRate = GetUpgradeTxRate(dev, priv->CurrentOperaRate);
// printk("StaRateAdaptive87SE(): Upgrade Tx Rate to %d\n", priv->CurrentOperaRate);
//[TRC Dell Lab] Bypass 12/9/6, Isaiah 2008-02-18 20:00
if(priv->CurrentOperaRate ==36)
{
priv->bUpdateARFR=true;
write_nic_word(dev, ARFR, 0x0F8F); //bypass 12/9/6
// printk("UP: ARFR=0xF8F\n");
}
else if(priv->bUpdateARFR)
{
priv->bUpdateARFR=false;
write_nic_word(dev, ARFR, 0x0FFF); //set 1M ~ 54Mbps.
// printk("UP: ARFR=0xFFF\n");
}
// Update Fail Tx rate and count.
if(priv->LastFailTxRate != priv->CurrentOperaRate)
{
priv->LastFailTxRate = priv->CurrentOperaRate;
priv->FailTxRateCount = 0;
priv->LastFailTxRateSS = -200; // Set lowest power.
}
}
}
else
{
if(priv->TryupingCount > 0)
priv->TryupingCount --;
}
if(bTryDown)
{
priv->TryDownCountLowData++;
priv->TryupingCount = 0;
{
// printk("DN: pHalData->TryDownCountLowData = %d\n",priv->TryDownCountLowData);
// printk("DN: TryDownTh =%d\n", TryDownTh);
// printk("DN: pHalData->bTryuping=%d\n", priv->bTryuping);
}
//Check if Tx rate can be degraded or Test trying upgrading should fallback.
if(priv->TryDownCountLowData > TryDownTh || priv->bTryuping)
{
priv->TryDownCountLowData = 0;
priv->bTryuping = false;
// Update fail information.
if(priv->LastFailTxRate == priv->CurrentOperaRate)
{
priv->FailTxRateCount ++;
// Record the Tx fail rate signal strength.
if(CurrSignalStrength > priv->LastFailTxRateSS)
{
priv->LastFailTxRateSS = CurrSignalStrength;
}
}
else
{
priv->LastFailTxRate = priv->CurrentOperaRate;
priv->FailTxRateCount = 1;
priv->LastFailTxRateSS = CurrSignalStrength;
}
priv->CurrentOperaRate = GetDegradeTxRate(dev, priv->CurrentOperaRate);
// Reduce chariot training time at weak signal strength situation. SD3 ED demand.
//[TRC Dell Lab] Revise Signal Threshold from -75 to -80 , Isaiah 2008-02-18 20:00
if( (CurrSignalStrength < -80) && (priv->CurrentOperaRate > 72 ))
{
priv->CurrentOperaRate = 72;
// printk("DN: weak signal strength (%d), degrade to 36Mbps\n", CurrSignalStrength);
}
//[TRC Dell Lab] Bypass 12/9/6, Isaiah 2008-02-18 20:00
if(priv->CurrentOperaRate ==36)
{
priv->bUpdateARFR=true;
write_nic_word(dev, ARFR, 0x0F8F); //bypass 12/9/6
// printk("DN: ARFR=0xF8F\n");
}
else if(priv->bUpdateARFR)
{
priv->bUpdateARFR=false;
write_nic_word(dev, ARFR, 0x0FFF); //set 1M ~ 54Mbps.
// printk("DN: ARFR=0xFFF\n");
}
//
// When it is CCK rate, it may need to update initial gain to receive lower power packets.
//
if(MgntIsCckRate(priv->CurrentOperaRate))
{
bUpdateInitialGain = true;
}
// printk("StaRateAdaptive87SE(): Degrade Tx Rate to %d\n", priv->CurrentOperaRate);
}
}
else
{
if(priv->TryDownCountLowData > 0)
priv->TryDownCountLowData --;
}
// Keep the Tx fail rate count to equal to 0x15 at most.
// Reduce the fail count at least to 10 sec if tx rate is tending stable.
if(priv->FailTxRateCount >= 0x15 ||
(!bTryUp && !bTryDown && priv->TryDownCountLowData == 0 && priv->TryupingCount && priv->FailTxRateCount > 0x6))
{
priv->FailTxRateCount --;
}
OfdmTxPwrIdx = priv->chtxpwr_ofdm[priv->ieee80211->current_network.channel];
CckTxPwrIdx = priv->chtxpwr[priv->ieee80211->current_network.channel];
//[TRC Dell Lab] Mac0x9e increase 2 level in 36M~18M situation, Isaiah 2008-02-18 24:00
if((priv->CurrentOperaRate < 96) &&(priv->CurrentOperaRate > 22))
{
u1bCck = read_nic_byte(dev, CCK_TXAGC);
u1bOfdm = read_nic_byte(dev, OFDM_TXAGC);
// case 1: Never enter High power
if(u1bCck == CckTxPwrIdx )
{
if(u1bOfdm != (OfdmTxPwrIdx+2) )
{
priv->bEnhanceTxPwr= true;
u1bOfdm = ((u1bOfdm+2) > 35) ? 35: (u1bOfdm+2);
write_nic_byte(dev, OFDM_TXAGC, u1bOfdm);
// printk("Enhance OFDM_TXAGC : +++++ u1bOfdm= 0x%x\n", u1bOfdm);
}
}
// case 2: enter high power
else if(u1bCck < CckTxPwrIdx)
{
if(!priv->bEnhanceTxPwr)
{
priv->bEnhanceTxPwr= true;
u1bOfdm = ((u1bOfdm+2) > 35) ? 35: (u1bOfdm+2);
write_nic_byte(dev, OFDM_TXAGC, u1bOfdm);
//RT_TRACE(COMP_RATE, DBG_TRACE, ("Enhance OFDM_TXAGC(2) : +++++ u1bOfdm= 0x%x\n", u1bOfdm));
}
}
}
else if(priv->bEnhanceTxPwr) //54/48/11/5.5/2/1
{
u1bCck = read_nic_byte(dev, CCK_TXAGC);
u1bOfdm = read_nic_byte(dev, OFDM_TXAGC);
// case 1: Never enter High power
if(u1bCck == CckTxPwrIdx )
{
priv->bEnhanceTxPwr= false;
write_nic_byte(dev, OFDM_TXAGC, OfdmTxPwrIdx);
//printk("Recover OFDM_TXAGC : ===== u1bOfdm= 0x%x\n", OfdmTxPwrIdx);
}
// case 2: enter high power
else if(u1bCck < CckTxPwrIdx)
{
priv->bEnhanceTxPwr= false;
u1bOfdm = ((u1bOfdm-2) > 0) ? (u1bOfdm-2): 0;
write_nic_byte(dev, OFDM_TXAGC, u1bOfdm);
//RT_TRACE(COMP_RATE, DBG_TRACE, ("Recover OFDM_TXAGC(2): ===== u1bOfdm= 0x%x\n", u1bOfdm));
}
}
//
// We need update initial gain when we set tx rate "from OFDM to CCK" or
// "from CCK to OFDM".
//
SetInitialGain:
if(bUpdateInitialGain)
{
if(MgntIsCckRate(priv->CurrentOperaRate)) // CCK
{
if(priv->InitialGain > priv->RegBModeGainStage)
{
priv->InitialGainBackUp= priv->InitialGain;
if(CurrSignalStrength < -85) // Low power, OFDM [0x17] = 26.
{
//SD3 SYs suggest that CurrSignalStrength < -65, ofdm 0x17=26.
priv->InitialGain = priv->RegBModeGainStage;
}
else if(priv->InitialGain > priv->RegBModeGainStage + 1)
{
priv->InitialGain -= 2;
}
else
{
priv->InitialGain --;
}
printk("StaRateAdaptive87SE(): update init_gain to index %d for date rate %d\n",priv->InitialGain, priv->CurrentOperaRate);
UpdateInitialGain(dev);
}
}
else // OFDM
{
if(priv->InitialGain < 4)
{
priv->InitialGainBackUp= priv->InitialGain;
priv->InitialGain ++;
printk("StaRateAdaptive87SE(): update init_gain to index %d for date rate %d\n",priv->InitialGain, priv->CurrentOperaRate);
UpdateInitialGain(dev);
}
}
}
//Record the related info
priv->LastRetryRate = CurrRetryRate;
priv->LastTxThroughput = TxThroughput;
priv->ieee80211->rate = priv->CurrentOperaRate * 5;
}
