| /* |
| * Copyright (c) 2007-2008 Atheros Communications Inc. |
| * |
| * Permission to use, copy, modify, and/or distribute this software for any |
| * purpose with or without fee is hereby granted, provided that the above |
| * copyright notice and this permission notice appear in all copies. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
| * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
| * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
| * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
| * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
| * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
| * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| */ |
| |
| #include "cprecomp.h" |
| #include "ratectrl.h" |
| |
| const u32_t zcRateToPhyCtrl[] = |
| { |
| /* 1M, 2M, 5M, 11M , 0 1 2 3*/ |
| 0x00000, 0x10000, 0x20000, 0x30000, |
| /* 6M 9M 12M 18M , 4 5 6 7*/ |
| 0xb0001, 0xf0001, 0xa0001, 0xe0001, |
| /* 24M 36M 48M 54M , 8 9 10 11*/ |
| 0x90001, 0xd0001, 0x80001, 0xc0001, |
| /* MCS0 MCS1 MCS2 MCS3, 12 13 14 15*/ |
| 0x00002, 0x10002, 0x20002, 0x30002, |
| /* MCS4 MCS5 MCS6 MCS7, 16 17 18 19*/ |
| 0x40002, 0x50002, 0x60002, 0x70002, |
| /* MCS8 MCS9 MCS10 MCS11, 20 21 22 23*/ |
| 0x80002, 0x90002, 0xa0002, 0xb0002, |
| /* MCS12 MCS13 MCS14 MCS15, 24 25 26 27*/ |
| 0xc0002, 0xd0002, 0xe0002, 0xf0002, |
| /* MCS14SG, MCS15SG MCS7SG , 28 29, 30*/ |
| 0x800e0002, 0x800f0002, 0x80070002 |
| }; |
| |
| |
| const u8_t zcHtRateTable[15][4] = |
| { /*[5G 20MHz] [5G 40MHz] [2.4G 20MHz] [2.4G 40MHz]*/ |
| { 4, 4, 0, 0}, /*OFDM6M OFDM6M CCK1M CCK1M */ |
| { 5, 5, 1, 1}, /*OFDM9M OFDM9M CCK2M CCK2M */ |
| { 13, 12, 2, 2}, /*MCS1 MCS0 CCK5M CCK5M */ |
| { 14, 13, 3, 3}, /*MCS2 MCS1 CCK11M CCK11M */ |
| { 15, 14, 13, 12}, /*MCS3 MCS2 MCS1 MCS0 */ |
| { 16, 15, 14, 13}, /*MCS4 MCS3 MCS2 MCS1 */ |
| { 23, 16, 15, 14}, /*MCS11 MCS4 MCS3 MCS2 */ |
| { 24, 23, 16, 15}, /*MCS12 MCS11 MCS4 MCS3 */ |
| { 25, 24, 23, 16}, /*MCS13 MCS12 MCS11 MCS4 */ |
| { 26, 25, 24, 23}, /*MCS14 MCS13 MCS12 MCS11 */ |
| { 27, 26, 25, 24}, /*MCS15 MCS14 MCS13 MCS12 */ |
| { 0, 27, 26, 25}, /*0 MCS15 MCS14 MCS13 */ |
| { 0, 29, 27, 26}, /*0 MCS15SG MCS15 MCS14 */ |
| { 0, 0, 0, 28}, /*0 0 0 MCS14SG*/ |
| { 0, 0, 0, 29} /*0 0 0 MCS15SG*/ |
| }; |
| |
| const u8_t zcHtOneTxStreamRateTable[15][4] = |
| { /*[5G 20MHz] [5G 40MHz] [2.4G 20MHz] [2.4G 40MHz]*/ |
| { 4, 4, 0, 0}, /*OFDM6M OFDM6M CCK1M CCK1M */ |
| { 5, 5, 1, 1}, /*OFDM9M OFDM9M CCK2M CCK2M */ |
| { 13, 12, 2, 2}, /*MCS1 MCS0 CCK5M CCK5M */ |
| { 14, 13, 3, 3}, /*MCS2 MCS1 CCK11M CCK11M */ |
| { 15, 14, 13, 12}, /*MCS3 MCS2 MCS1 MCS0 */ |
| { 16, 15, 14, 13}, /*MCS4 MCS3 MCS2 MCS1 */ |
| { 17, 16, 15, 14}, /*MCS5 MCS4 MCS3 MCS2 */ |
| { 18, 17, 16, 15}, /*MCS6 MCS5 MCS4 MCS3 */ |
| { 19, 18, 17, 16}, /*MCS7 MCS6 MCS5 MCS4 */ |
| { 0, 19, 18, 17}, /*0 MCS7 MCS6 MCS5 */ |
| { 0, 30, 19, 18}, /*0 MCS7SG MCS7 MCS6 */ |
| { 0, 0, 0, 19}, /*0 0 0 MCS7 */ |
| { 0, 0, 0, 30}, /*0 0 0 MCS7SG */ |
| { 0, 0, 0, 0 }, /*0 0 0 0 */ |
| { 0, 0, 0, 0 } /*0 0 0 0 */ |
| }; |
| |
| const u16_t zcRate[] = |
| { |
| 1, 2, 5, 11, /* 1M, 2M, 5M, 11M , 0 1 2 3*/ |
| 6, 9, 12, 18, /* 6M 9M 12M 18M , 4 5 6 7*/ |
| 24, 36, 48, 54, /* 24M 36M 48M 54M , 8 9 10 11*/ |
| 13, 27, 40, 54, /* MCS0 MCS1 MCS2 MCS3 , 12 13 14 15*/ |
| 81, 108, 121, 135, /* MCS4 MCS5 MCS6 MCS7 , 16 17 18 19*/ |
| 27, 54, 81, 108, /* MCS8 MCS9 MCS10 MCS11 , 20 21 22 23*/ |
| 162, 216, 243, 270, /* MCS12 MCS13 MCS14 MCS15 , 24 25 26 27*/ |
| 270, 300, 150 /* MCS14SG, MCS15SG, MCS7SG , 28 29 30*/ |
| }; |
| |
| const u16_t PERThreshold[] = |
| { |
| 100, 50, 50, 50, /* 1M, 2M, 5M, 11M , 0 1 2 3*/ |
| 50, 50, 30, 30, /* 6M 9M 12M 18M , 4 5 6 7*/ |
| 25, 25, 25, 20, /* 24M 36M 48M 54M , 8 9 10 11*/ |
| 50, 50, 50, 40, /* MCS0 MCS1 MCS2 MCS3 , 12 13 14 15*/ |
| 30, 30, 30, 30, /* MCS4 MCS5 MCS6 MCS7 , 16 17 18 19*/ |
| 30, 30, 25, 25, /* MCS8 MCS9 MCS10 MCS11 , 20 21 22 23*/ |
| 25, 25, 15, 15, /* MCS12 MCS13 MCS14 MCS15 , 24 25 26 27*/ |
| 15, 15, 10 /* MCS14SG, MCS15SG , 28 29*/ |
| }; |
| |
| const u16_t FailDiff[] = |
| { |
| 40, 46, 40, 0, /* 1M, 2M, 5M, 11M , 0 1 2 3*/ |
| 24, 17, 22, 16, /* 6M 9M 12M 18M , 4 5 6 7*/ |
| 19, 13, 5, 0, /* 24M 36M 48M 54M , 8 9 10 11*/ |
| 36, 22, 15, 19, /* MCS0 MCS1 MCS2 MCS3 , 12 13 14 15*/ |
| 12, 5, 4, 7, /* MCS4 MCS5 MCS6 MCS7 , 16 17 18 19*/ |
| 0, 0, 0, 0, /* MCS8 MCS9 MCS10 MCS11 , 20 21 22 23*/ |
| 9, 4, 3, 3, /* MCS12 MCS13 MCS14 MCS15 , 24 25 26 27*/ |
| 3, 0, 0 /* MCS14SG, MCS15SG , 28 29*/ |
| }; |
| |
| |
| #ifdef ZM_ENABLE_BA_RATECTRL |
| u32_t TxMPDU[29]; |
| u32_t BAFail[29]; |
| u32_t BAPER[29]; |
| const u16_t BADiff[] = |
| { |
| 0, 0, 0, 0, |
| 0, 0, 0, 0, |
| 0, 0, 0, 0, |
| 361, 220, 151, 187, |
| 122, 48, 41, 65, |
| 0, 0, 0, 0, |
| 88, 33, 27, 25, |
| 0 |
| }; |
| #endif |
| |
| /************************************************************************/ |
| /* */ |
| /* FUNCTION DESCRIPTION zfRateCtrlInitCell */ |
| /* Initialize rate control cell. */ |
| /* */ |
| /* INPUTS */ |
| /* dev : device pointer */ |
| /* type : 0=>11b, 1=>11a/g, 2=>11n, 3=>11n one Tx stream */ |
| /* gBand : 1=>2.4G, 0=>5G */ |
| /* */ |
| /* OUTPUTS */ |
| /* None */ |
| /* */ |
| /* AUTHOR */ |
| /* Stephen Chen Atheros Communications, INC. 2007.2 */ |
| /* */ |
| /************************************************************************/ |
| void zfRateCtrlInitCell(zdev_t* dev, struct zsRcCell* rcCell, u8_t type, |
| u8_t gBand, u8_t SG40) |
| { |
| u8_t i; |
| u8_t maxrate; |
| zmw_get_wlan_dev(dev); |
| |
| if (SG40) SG40 = 1; |
| |
| if (gBand != 0) |
| { |
| if (type == 1) //11g |
| { |
| for (i=0; i<4; i++) //1M 2M 5M 11M |
| { |
| rcCell->operationRateSet[i] = (u8_t)i; |
| } |
| for (i=4; i<10; i++) //12M 18M 24M 36M 48M 54M |
| { |
| rcCell->operationRateSet[i] = 2+i; |
| } |
| rcCell->operationRateCount = 10; |
| rcCell->currentRateIndex = 5; //18M |
| } |
| else if (type == 2) //11ng |
| { |
| if (wd->wlanMode == ZM_MODE_AP) //AP 11ng 40M |
| { |
| for (i=0; i<15; i++) |
| { |
| rcCell->operationRateSet[i] = zcHtRateTable[i][3]; |
| } |
| if(!SG40) rcCell->operationRateSet[13] = 27; |
| rcCell->operationRateCount = 14+SG40; |
| rcCell->currentRateIndex = 10; |
| } |
| else //STA |
| { |
| if (wd->sta.htCtrlBandwidth == ZM_BANDWIDTH_40MHZ) //11ng 40M |
| { |
| for (i=0; i<15; i++) |
| { |
| rcCell->operationRateSet[i] = zcHtRateTable[i][3]; |
| } |
| if(!SG40) rcCell->operationRateSet[13] = 27; |
| rcCell->operationRateCount = 14+SG40; |
| rcCell->currentRateIndex = 10; |
| } |
| else //11ng 20M |
| { |
| for (i=0; i<13; i++) |
| { |
| rcCell->operationRateSet[i] = zcHtRateTable[i][2]; |
| } |
| rcCell->operationRateCount = 13; |
| rcCell->currentRateIndex = 9; |
| } |
| } |
| } |
| else if (type == 3) //11ng one Tx stream |
| { |
| if (wd->sta.htCtrlBandwidth == ZM_BANDWIDTH_40MHZ) //11ng 40M one Tx stream |
| { |
| if(SG40 != 0) |
| { |
| maxrate = 13; |
| } |
| else |
| { |
| maxrate = 12; |
| } |
| for (i=0; i<maxrate; i++) |
| { |
| rcCell->operationRateSet[i] = zcHtOneTxStreamRateTable[i][3]; |
| } |
| rcCell->operationRateCount = i; |
| rcCell->currentRateIndex = ((i+1)*3)/4; |
| } |
| else //11ng 20M |
| { |
| for (i=0; i<11; i++) |
| { |
| rcCell->operationRateSet[i] = zcHtOneTxStreamRateTable[i][2]; |
| } |
| rcCell->operationRateCount = i; |
| rcCell->currentRateIndex = ((i+1)*3)/4; |
| } |
| } |
| else //if (type == 0) //11b |
| { |
| for (i=0; i<4; i++) |
| { |
| rcCell->operationRateSet[i] = (u8_t)i; |
| } |
| rcCell->operationRateCount = 4; |
| rcCell->currentRateIndex = rcCell->operationRateCount-1; |
| } |
| } |
| else |
| { |
| if (type == 2) //11na |
| { |
| if (wd->wlanMode == ZM_MODE_AP) //AP 11na 40M |
| { |
| for (i=0; i<(12+SG40); i++) |
| { |
| rcCell->operationRateSet[i] = zcHtRateTable[i][1]; |
| } |
| rcCell->operationRateCount = 12+SG40; |
| rcCell->currentRateIndex = 8; |
| } |
| else //STA |
| { |
| if (wd->sta.htCtrlBandwidth == ZM_BANDWIDTH_40MHZ) //11na 40M |
| { |
| for (i=0; i<(12+SG40); i++) |
| { |
| rcCell->operationRateSet[i] = zcHtRateTable[i][1]; |
| } |
| rcCell->operationRateCount = 12+SG40; |
| rcCell->currentRateIndex = 8; |
| } |
| else //11na 20M |
| { |
| for (i=0; i<11; i++) |
| { |
| rcCell->operationRateSet[i] = zcHtRateTable[i][0]; |
| } |
| rcCell->operationRateCount = 11; |
| rcCell->currentRateIndex = 7; |
| } |
| } |
| } |
| else if (type == 3) //11na one Tx stream |
| { |
| if (wd->sta.htCtrlBandwidth == ZM_BANDWIDTH_40MHZ) //11na 40M one Tx stream |
| { |
| if(SG40 != 0) |
| { |
| maxrate = 11; |
| } |
| else |
| { |
| maxrate = 10; |
| } |
| for (i=0; i<maxrate; i++) |
| { |
| rcCell->operationRateSet[i] = zcHtOneTxStreamRateTable[i][1]; |
| } |
| rcCell->operationRateCount = i; |
| rcCell->currentRateIndex = ((i+1)*3)/4; |
| } |
| else //11ng 20M |
| { |
| for (i=0; i<9; i++) |
| { |
| rcCell->operationRateSet[i] = zcHtOneTxStreamRateTable[i][0]; |
| } |
| rcCell->operationRateCount = i; |
| rcCell->currentRateIndex = ((i+1)*3)/4; |
| } |
| } |
| else //if (type == 1) //11a |
| { |
| for (i=0; i<8; i++) //6M 9M 12M 18M 24M 36M 48M 54M |
| { |
| rcCell->operationRateSet[i] = i+4; |
| } |
| rcCell->operationRateCount = 8; |
| rcCell->currentRateIndex = 4; //24M |
| } |
| } |
| |
| rcCell->flag = 0; |
| rcCell->txCount = 0; |
| rcCell->failCount = 0; |
| rcCell->currentRate = rcCell->operationRateSet[rcCell->currentRateIndex]; |
| rcCell->lasttxCount = 0; |
| rcCell->lastTime = wd->tick; |
| rcCell->probingTime = wd->tick; |
| for (i=0; i<ZM_RATE_TABLE_SIZE; i++) { |
| wd->PER[i] = 0; |
| wd->txMPDU[i] = wd->txFail[i] = 0; |
| } |
| wd->probeCount = 0; |
| wd->probeInterval = 0; |
| #ifdef ZM_ENABLE_BA_RATECTRL |
| for (i=0; i<29; i++) { |
| TxMPDU[i]=0; |
| BAFail[i]=0; |
| BAPER[i]=0; |
| } |
| #endif |
| return; |
| } |
| |
| |
| /************************************************************************/ |
| /* */ |
| /* FUNCTION DESCRIPTION zfRateCtrlGetHigherRate */ |
| /* Get a higher rate. */ |
| /* */ |
| /* INPUTS */ |
| /* rcCell : rate control cell */ |
| /* */ |
| /* OUTPUTS */ |
| /* rate */ |
| /* */ |
| /* AUTHOR */ |
| /* Stephen Chen Atheros Communications, INC. 2007.2 */ |
| /* */ |
| /************************************************************************/ |
| u8_t zfRateCtrlGetHigherRate(struct zsRcCell* rcCell) |
| { |
| u8_t rateIndex; |
| |
| rateIndex = rcCell->currentRateIndex |
| + (((rcCell->currentRateIndex+1) < rcCell->operationRateCount)?1:0); |
| return rcCell->operationRateSet[rateIndex]; |
| } |
| |
| |
| /************************************************************************/ |
| /* */ |
| /* FUNCTION DESCRIPTION zfRateCtrlNextLowerRate */ |
| /* Get a lower rate. */ |
| /* */ |
| /* INPUTS */ |
| /* rcCell : rate control cell */ |
| /* */ |
| /* OUTPUTS */ |
| /* rate */ |
| /* */ |
| /* AUTHOR */ |
| /* Stephen Chen Atheros Communications, INC. 2007.2 */ |
| /* */ |
| /************************************************************************/ |
| u8_t zfRateCtrlNextLowerRate(zdev_t* dev, struct zsRcCell* rcCell) |
| { |
| zmw_get_wlan_dev(dev); |
| if (rcCell->currentRateIndex > 0) |
| { |
| rcCell->currentRateIndex--; |
| rcCell->currentRate = rcCell->operationRateSet[rcCell->currentRateIndex]; |
| } |
| zm_msg1_tx(ZM_LV_0, "Lower Tx Rate=", rcCell->currentRate); |
| //DbgPrint("Lower Tx Rate=%d", rcCell->currentRate); |
| rcCell->failCount = rcCell->txCount = 0; |
| rcCell->lasttxCount = 0; |
| rcCell->lastTime = wd->tick; |
| return rcCell->currentRate; |
| } |
| |
| |
| /************************************************************************/ |
| /* */ |
| /* FUNCTION DESCRIPTION zfRateCtrlRateDiff */ |
| /* Rate difference. */ |
| /* */ |
| /* INPUTS */ |
| /* rcCell : rate control cell */ |
| /* retryRate : retry rate */ |
| /* */ |
| /* OUTPUTS */ |
| /* rate difference */ |
| /* */ |
| /* AUTHOR */ |
| /* Stephen Chen Atheros Communications, INC. 2007.2 */ |
| /* */ |
| /************************************************************************/ |
| u8_t zfRateCtrlRateDiff(struct zsRcCell* rcCell, u8_t retryRate) |
| { |
| u16_t i; |
| |
| /* Find retryRate in operationRateSet[] */ |
| for (i=0; i<rcCell->operationRateCount; i++) |
| { |
| if (retryRate == rcCell->operationRateSet[i]) |
| { |
| if (i < rcCell->currentRateIndex) |
| { |
| return ((rcCell->currentRateIndex - i)+1)>>1; |
| } |
| else if (i == rcCell->currentRateIndex == 0) |
| { |
| return 1; |
| } |
| else |
| { |
| return 0; |
| } |
| } |
| } |
| /* TODO : retry rate not in operation rate set */ |
| zm_msg1_tx(ZM_LV_0, "Not in operation rate set:", retryRate); |
| return 1; |
| |
| } |
| |
| u32_t zfRateCtrlUDPTP(zdev_t* dev, u16_t Rate, u32_t PER) { |
| if ((PER < 100) && (Rate > 0) && PER) |
| return 1168000/(((12304/Rate)+197)*(100+100*PER/(100-PER))); |
| else |
| return 0; |
| } |
| |
| u8_t zfRateCtrlFindMaxUDPTP(zdev_t* dev, struct zsRcCell* rcCell) { |
| u8_t i, maxIndex=0, rateIndex; |
| u32_t max=0, UDPThroughput; |
| |
| zmw_get_wlan_dev(dev); |
| |
| rateIndex = zm_agg_min(rcCell->currentRateIndex+3, rcCell->operationRateCount-1); |
| for (i=rcCell->currentRateIndex; i < rateIndex; i++) { |
| UDPThroughput = zfRateCtrlUDPTP(dev, zcRate[rcCell->operationRateSet[i]], |
| wd->PER[rcCell->operationRateSet[i]]); |
| if (max < UDPThroughput) { |
| max = UDPThroughput; |
| maxIndex = i; |
| } |
| } |
| |
| return rcCell->operationRateSet[maxIndex]; |
| } |
| /************************************************************************/ |
| /* */ |
| /* FUNCTION DESCRIPTION zfRateCtrlGetTxRate */ |
| /* Get transmission rate. */ |
| /* */ |
| /* INPUTS */ |
| /* dev : device pointer */ |
| /* rcCell : rate control cell */ |
| /* probing : rate probing flag */ |
| /* */ |
| /* OUTPUTS */ |
| /* Tx rate */ |
| /* */ |
| /* AUTHOR */ |
| /* Stephen Chen Atheros Communications, INC. 2007.2 */ |
| /* */ |
| /************************************************************************/ |
| u16_t zfRateCtrlGetTxRate(zdev_t* dev, struct zsRcCell* rcCell, u16_t* probing) |
| { |
| u8_t newRate, highRate; |
| zmw_get_wlan_dev(dev); |
| |
| zm_msg1_tx(ZM_LV_3, "txCount=", rcCell->txCount); |
| zm_msg1_tx(ZM_LV_3, "probingTime=", rcCell->probingTime); |
| zm_msg1_tx(ZM_LV_3, "tick=", wd->tick); |
| *probing = 0; |
| newRate = rcCell->currentRate; |
| |
| if (wd->probeCount && (wd->probeCount < wd->success_probing)) |
| { |
| if (wd->probeInterval < 50) |
| { |
| wd->probeInterval++; |
| } |
| else |
| { |
| wd->probeInterval++; |
| if (wd->probeInterval > 52) //probe 51, 52, 53 three packets every 50 packets |
| { |
| wd->probeInterval = 0; |
| } |
| newRate=zfRateCtrlGetHigherRate(rcCell); |
| *probing = 1; |
| wd->probeCount++; |
| rcCell->probingTime = wd->tick; |
| } |
| } |
| /* Accumulate at least 1000ms and 8 packets or Accumulate over 1K packets */ |
| else if ((((wd->tick - rcCell->probingTime) > (ZM_RATE_CTRL_PROBING_INTERVAL_MS/ZM_MS_PER_TICK)) |
| && (rcCell->txCount >= ZM_RATE_CTRL_MIN_PROBING_PACKET)) |
| || (rcCell->txCount >= 1000)) |
| { |
| #ifndef ZM_DISABLE_RATE_CTRL |
| /* PER = fail/total */ |
| wd->probeCount = 0; |
| wd->probeSuccessCount = 0; |
| if (wd->txMPDU[rcCell->currentRate] != 0) { |
| wd->PER[rcCell->currentRate] = zm_agg_min(100, |
| (wd->txFail[rcCell->currentRate]*100)/wd->txMPDU[rcCell->currentRate]); |
| if (!wd->PER[rcCell->currentRate]) wd->PER[rcCell->currentRate] ++; |
| } |
| |
| /* if PER < threshold, do rate probing, return probing rate */ |
| if ((wd->PER[rcCell->currentRate] <= (ZM_RATE_PROBING_THRESHOLD+15)) || |
| ((rcCell->currentRate <= 16) && |
| ((wd->PER[rcCell->currentRate]/2) <= ZM_RATE_PROBING_THRESHOLD))) |
| { |
| if ((newRate=zfRateCtrlGetHigherRate(rcCell)) != rcCell->currentRate) |
| { |
| *probing = 1; |
| wd->probeCount++; |
| wd->probeInterval = 0; |
| wd->success_probing = |
| (rcCell->currentRate <= 16)? (ZM_RATE_SUCCESS_PROBING/2) : ZM_RATE_SUCCESS_PROBING; |
| //DbgPrint("Start Probing"); |
| zm_msg1_tx(ZM_LV_0, "Probing Rate=", newRate); |
| } |
| } |
| #endif |
| |
| zm_msg0_tx(ZM_LV_1, "Diminish counter"); |
| rcCell->failCount = rcCell->failCount>>1; |
| rcCell->txCount = rcCell->txCount>>1; |
| wd->txFail[rcCell->currentRate] = wd->txFail[rcCell->currentRate] >> 1; |
| wd->txMPDU[rcCell->currentRate] = wd->txMPDU[rcCell->currentRate] >> 1; |
| |
| |
| if (rcCell->currentRate > 15) { |
| highRate = zfRateCtrlGetHigherRate(rcCell); |
| if ((highRate != rcCell->currentRate) && wd->PER[highRate] && |
| ((wd->PER[rcCell->currentRate] + FailDiff[rcCell->currentRate]) > |
| wd->PER[highRate])) { |
| //DbgPrint("PER compare force raise rate to %d", highRate); |
| wd->probeSuccessCount = wd->probeCount = ZM_RATE_SUCCESS_PROBING; |
| zfRateCtrlTxSuccessEvent(dev, rcCell, highRate); |
| } |
| } |
| else { |
| highRate = zfRateCtrlFindMaxUDPTP(dev, rcCell); |
| if (rcCell->currentRate < highRate) { |
| //DbgPrint("UDP Throughput compare force raise rate to %d", highRate); |
| wd->probeSuccessCount = wd->probeCount = ZM_RATE_SUCCESS_PROBING; |
| zfRateCtrlTxSuccessEvent(dev, rcCell, highRate); |
| } |
| } |
| rcCell->probingTime = wd->tick; |
| } |
| |
| if( (wd->tick > 1000) |
| && ((wd->tick - rcCell->lastTime) > 3840) ) |
| { |
| if (rcCell->lasttxCount < 70) |
| { |
| rcCell->failCount = rcCell->failCount>>1; |
| rcCell->txCount = rcCell->txCount>>1; |
| wd->txFail[rcCell->currentRate] = wd->txFail[rcCell->currentRate] >> 1; |
| wd->txMPDU[rcCell->currentRate] = wd->txMPDU[rcCell->currentRate] >> 1; |
| |
| rcCell->failCount = (rcCell->failCount < rcCell->txCount)? |
| rcCell->failCount : rcCell->txCount; |
| wd->txFail[rcCell->currentRate] = (wd->txFail[rcCell->currentRate] < wd->txMPDU[rcCell->currentRate])? |
| wd->txFail[rcCell->currentRate] : wd->txMPDU[rcCell->currentRate]; |
| } |
| |
| rcCell->lastTime = wd->tick; |
| rcCell->lasttxCount = 0; |
| } |
| |
| rcCell->txCount++; |
| rcCell->lasttxCount++; |
| wd->txMPDU[rcCell->currentRate]++; |
| zm_msg1_tx(ZM_LV_1, "Get Tx Rate=", newRate); |
| return newRate; |
| } |
| |
| |
| /************************************************************************/ |
| /* */ |
| /* FUNCTION DESCRIPTION zfRateCtrlTxFailEvent */ |
| /* Tx fail event. Calculate PER and lower Tx rate if under */ |
| /* PER under threshold. */ |
| /* */ |
| /* INPUTS */ |
| /* rcCell : rate control cell */ |
| /* retryRate : retry rate */ |
| /* */ |
| /* OUTPUTS */ |
| /* None */ |
| /* */ |
| /* AUTHOR */ |
| /* Stephen Chen Atheros Communications, INC. 2007.2 */ |
| /* */ |
| /************************************************************************/ |
| void zfRateCtrlTxFailEvent(zdev_t* dev, struct zsRcCell* rcCell, u8_t aggRate, u32_t retryRate) |
| { |
| zmw_get_wlan_dev(dev); |
| |
| zmw_declare_for_critical_section(); |
| |
| #ifndef ZM_DISABLE_RATE_CTRL |
| //DbgPrint("aggRate=%d, retryRate=%d", aggRate, retryRate); |
| if (aggRate && (aggRate != rcCell->currentRate)) { |
| wd->txFail[aggRate] += retryRate; |
| return; |
| } |
| |
| if (!aggRate) { |
| retryRate = (zfRateCtrlRateDiff(rcCell, (u8_t)retryRate)+1)>>1; |
| if (rcCell->currentRate <12) //legacy rate |
| { |
| retryRate*=2; |
| } |
| } |
| rcCell->failCount += retryRate; |
| wd->txFail[rcCell->currentRate] += retryRate; |
| |
| //DbgPrint("failCount=%d", rcCell->failCount); |
| if (rcCell->failCount > ZM_MIN_RATE_FAIL_COUNT) |
| { |
| if (wd->txMPDU[rcCell->currentRate] != 0) { |
| wd->PER[rcCell->currentRate] = zm_agg_min(100, |
| (wd->txFail[rcCell->currentRate]*100)/wd->txMPDU[rcCell->currentRate]); |
| if (!wd->PER[rcCell->currentRate]) wd->PER[rcCell->currentRate] ++; |
| } |
| //zm_msg1_tx(ZM_LV_1, "PER=", per); |
| //DbgPrint("PER=%d, txFail=%d, txMPDU=%d", wd->PER[rcCell->currentRate], wd->txFail[rcCell->currentRate], wd->txMPDU[rcCell->currentRate]); |
| if (wd->PER[rcCell->currentRate] > PERThreshold[rcCell->currentRate]) |
| { |
| /* Lower Tx Rate if PER < THRESHOLD */ |
| zfRateCtrlNextLowerRate(dev, rcCell); |
| rcCell->flag |= ZM_RC_TRAINED_BIT; |
| |
| // Resolve compatibility problem with Marvell |
| if(rcCell->currentRate == 15) |
| { |
| zmw_leave_critical_section(dev); |
| zfHpSetAggPktNum(dev, 8); |
| zmw_enter_critical_section(dev); |
| } |
| |
| wd->txFail[rcCell->currentRate] = wd->txFail[rcCell->currentRate] >> 1; |
| wd->txMPDU[rcCell->currentRate] = wd->txMPDU[rcCell->currentRate] >> 1; |
| |
| wd->probeCount = wd->probeSuccessCount = 0; |
| } |
| } |
| |
| #endif |
| return; |
| } |
| |
| |
| /************************************************************************/ |
| /* */ |
| /* FUNCTION DESCRIPTION zfRateCtrlTxSuccessEvent */ |
| /* Tx success event. Raise Tx rate because rate probing success. */ |
| /* */ |
| /* INPUTS */ |
| /* rcCell : rate control cell */ |
| /* successRate : success rate */ |
| /* */ |
| /* OUTPUTS */ |
| /* None */ |
| /* */ |
| /* AUTHOR */ |
| /* Stephen Chen Atheros Communications, INC. 2007.2 */ |
| /* */ |
| /************************************************************************/ |
| void zfRateCtrlTxSuccessEvent(zdev_t* dev, struct zsRcCell* rcCell, u8_t successRate) |
| { |
| /* Raise Tx Rate */ |
| u16_t i, PERProbe; |
| u16_t pcount; |
| zmw_get_wlan_dev(dev); |
| |
| zmw_declare_for_critical_section(); |
| |
| //DbgPrint("Probing successRate=%d", successRate); |
| /* Find successRate in operationRateSet[] */ |
| wd->probeSuccessCount++; |
| if (wd->probeCount < wd->success_probing) |
| { |
| return; |
| } |
| |
| pcount = wd->probeCount; |
| if (pcount != 0) |
| { |
| PERProbe = wd->probeSuccessCount * 100 / pcount; |
| } |
| else |
| { |
| PERProbe = 1; |
| } |
| |
| if (PERProbe < ((rcCell->currentRate < 16)? 80:100)) |
| { |
| return; |
| } |
| //DbgPrint("wd->probeCount=%d, wd->probeSuccessCount=%d", wd->probeCount, wd->probeSuccessCount); |
| wd->probeCount = wd->probeSuccessCount = 0; |
| for (i=0; i<rcCell->operationRateCount; i++) |
| { |
| if (successRate == rcCell->operationRateSet[i]) |
| { |
| if (i > rcCell->currentRateIndex) |
| { |
| /* Raise current Tx rate */ |
| zm_msg1_tx(ZM_LV_0, "Raise Tx Rate=", successRate); |
| //DbgPrint("Raise Tx Rate=%d", successRate); |
| |
| // Resolve compatibility problem with Marvell |
| if((rcCell->currentRate <= 15) && (successRate > 15)) |
| { |
| zmw_leave_critical_section(dev); |
| zfHpSetAggPktNum(dev, 16); |
| zmw_enter_critical_section(dev); |
| } |
| |
| rcCell->currentRate = successRate; |
| rcCell->currentRateIndex = (u8_t)i; |
| rcCell->failCount = rcCell->txCount = 0; |
| rcCell->lasttxCount = 0; |
| rcCell->lastTime = wd->tick; |
| wd->txFail[rcCell->currentRate] = wd->txFail[rcCell->currentRate] >> 1; |
| wd->txMPDU[rcCell->currentRate] = wd->txMPDU[rcCell->currentRate] >> 1; |
| } |
| } |
| } |
| |
| return; |
| } |
| |
| |
| /************************************************************************/ |
| /* */ |
| /* FUNCTION DESCRIPTION zfRateCtrlRxRssiEvent */ |
| /* Rx RSSI event. Calculate RSSI moving average, accelarate */ |
| /* rate probing if RSSI variation over threshold. */ |
| /* */ |
| /* INPUTS */ |
| /* rcCell : rate control cell */ |
| /* successRate : success rate */ |
| /* */ |
| /* OUTPUTS */ |
| /* None */ |
| /* */ |
| /* AUTHOR */ |
| /* Stephen Chen Atheros Communications, INC. 2007.2 */ |
| /* */ |
| /************************************************************************/ |
| void zfRateCtrlRxRssiEvent(struct zsRcCell* rcCell, u16_t rxRssi) |
| { |
| /* if delta(rcCell->rxRssi, rxRssi) > ZM_RATE_CTRL_RSSI_VARIATION */ |
| if ((rcCell->rxRssi - rxRssi) > ZM_RATE_CTRL_RSSI_VARIATION) |
| { |
| /* Accelerate rate probing via decreaing rcCell->probingTime */ |
| rcCell->probingTime -= ZM_RATE_CTRL_PROBING_INTERVAL_MS/ZM_MS_PER_TICK; |
| } |
| |
| /* Update RSSI moving average */ |
| rcCell->rxRssi = (((rcCell->rxRssi*7) + rxRssi)+4) >> 3; |
| return; |
| } |
| |
| |
| #ifdef ZM_ENABLE_BA_RATECTRL |
| u8_t HigherRate(u8_t Rate) { |
| if (Rate < 28) Rate++; //28=MCS15SG, 27=MCS15, 26=MCS14, 25=MCS13 |
| if (Rate > 28) Rate = 28; |
| while ((Rate >= 20) && (Rate <= 23)) { |
| Rate ++; |
| } |
| return Rate; |
| } |
| |
| u8_t LowerRate(u8_t Rate) { |
| if (Rate > 1) Rate--; |
| while ((Rate >= 20) && (Rate <= 23)) { |
| Rate --; |
| } |
| return Rate; |
| } |
| |
| u8_t RateMapToRateIndex(u8_t Rate, struct zsRcCell* rcCell) { |
| u8_t i; |
| for (i=0; i<rcCell->operationRateCount; i++) { |
| if (Rate == rcCell->operationRateSet[i]) { |
| return i; |
| } |
| } |
| return 0; |
| } |
| |
| void zfRateCtrlAggrSta(zdev_t* dev) { |
| u8_t RateIndex, Rate; |
| u8_t HRate; |
| u8_t LRate; |
| u32_t RateCtrlTxMPDU, RateCtrlBAFail; |
| zmw_get_wlan_dev(dev); |
| |
| RateIndex = wd->sta.oppositeInfo[0].rcCell.currentRateIndex; |
| Rate = wd->sta.oppositeInfo[0].rcCell.operationRateSet[RateIndex]; |
| |
| TxMPDU[Rate] = (TxMPDU[Rate] / 5) + (wd->commTally.RateCtrlTxMPDU * 4 / 5); |
| BAFail[Rate] = (BAFail[Rate] / 5) + (wd->commTally.RateCtrlBAFail * 4 / 5); |
| RateCtrlTxMPDU = wd->commTally.RateCtrlTxMPDU; |
| RateCtrlBAFail = wd->commTally.RateCtrlBAFail; |
| wd->commTally.RateCtrlTxMPDU = 0; |
| wd->commTally.RateCtrlBAFail = 0; |
| if (TxMPDU[Rate] > 0) { |
| BAPER[Rate] = BAFail[Rate] * 1000 / TxMPDU[Rate]; //PER*1000 |
| BAPER[Rate] = (BAPER[Rate]>0)? BAPER[Rate]:1; |
| } |
| else { |
| return; |
| } |
| |
| HRate = HigherRate(Rate); |
| LRate = LowerRate(Rate); |
| if (BAPER[Rate]>200) { |
| if ((RateCtrlTxMPDU > 100) && (BAPER[Rate]<300) && (HRate != Rate) && BAPER[HRate] && |
| (BAPER[HRate] < BAPER[Rate] + BADiff[Rate])) { |
| Rate = HRate; |
| //DbgPrint("Rate improved to %d", Rate); |
| } |
| else { |
| Rate = LRate; |
| //DbgPrint("Rate decreased to %d", Rate); |
| } |
| } |
| else if (BAPER[Rate] && BAPER[Rate]<100) { |
| if (RateCtrlTxMPDU > 100) { |
| Rate = HRate; |
| //DbgPrint("Rate improved to %d", Rate); |
| } |
| } |
| wd->sta.oppositeInfo[0].rcCell.currentRate = Rate; |
| wd->sta.oppositeInfo[0].rcCell.currentRateIndex = RateMapToRateIndex(Rate, &wd->sta.oppositeInfo[0].rcCell); |
| } |
| #endif |
