drivers/staging/winbond/mto.c

   1 /*
   2  * ============================================================================
   3  * MTO.C -
   4  *
   5  * Description:
   6  * MAC Throughput Optimization for W89C33 802.11g WLAN STA.
   7  *
   8  * The following MIB attributes or internal variables will be affected
   9  * while the MTO is being executed:
  10  *      dot11FragmentationThreshold,
  11  *      dot11RTSThreshold,
  12  *      transmission rate and PLCP preamble type,
  13  *      CCA mode,
  14  *      antenna diversity.
  15  *
  16  * Copyright (c) 2003 Winbond Electronics Corp. All rights reserved.
  17  * ============================================================================
  18  */
  19
  20 #include "sme_api.h"
  21 #include "wbhal.h"
  22 #include "wb35reg_f.h"
  23 #include "core.h"
  24
  25 /* Declare SQ3 to rate and fragmentation threshold table */
  26 /* Declare fragmentation thresholds table */
  27 #define MTO_MAX_FRAG_TH_LEVELS          5
  28 #define MTO_MAX_DATA_RATE_LEVELS        12
  29
  30 u16 MTO_Frag_Th_Tbl[MTO_MAX_FRAG_TH_LEVELS] = {
  31         256, 384, 512, 768, 1536
  32 };
  33
  34 /*
  35  * Declare data rate table:
  36  * The following table will be changed at anytime if the opration rate
  37  * supported by AP don't match the table
  38  */
  39 static u8 MTO_Data_Rate_Tbl[MTO_MAX_DATA_RATE_LEVELS] = {
  40         2, 4, 11, 22, 12, 18, 24, 36, 48, 72, 96, 108
  41 };
  42
  43 static int TotalTxPkt;
  44 static int TotalTxPktRetry;
  45 /* this record the retry rate at different data rate */
  46 static int retryrate_rec[MTO_MAX_DATA_RATE_LEVELS];
  47
  48 static int PeriodTotalTxPkt;
  49 static int PeriodTotalTxPktRetry;
  50
  51 static u8 boSparseTxTraffic;
  52
  53 void MTO_Init(struct wbsoft_priv *adapter);
  54 void TxRateReductionCtrl(struct wbsoft_priv *adapter);
  55 void MTO_SetTxCount(struct wbsoft_priv *adapter, u8 t0, u8 index);
  56 void MTO_TxFailed(struct wbsoft_priv *adapter);
  57 void hal_get_dto_para(struct wbsoft_priv *adapter, char *buffer);
  58
  59 /*
  60  * ===========================================================================
  61  * MTO_Init --
  62  *
  63  *  Description:
  64  *    Initialize MTO parameters.
  65  *
  66  *    This function should be invoked during system initialization.
  67  *
  68  *  Arguments:
  69  *    adapter      - The pointer to the Miniport adapter Context
  70  * ===========================================================================
  71  */
  72 void MTO_Init(struct wbsoft_priv *adapter)
  73 {
  74         int i;
  75
  76         MTO_PREAMBLE_TYPE() = MTO_PREAMBLE_SHORT;   /* for test */
  77
  78         MTO_CNT_ANT(0)                  = 0;
  79         MTO_CNT_ANT(1)                  = 0;
  80         MTO_SQ_ANT(0)                   = 0;
  81         MTO_SQ_ANT(1)                   = 0;
  82
  83         MTO_AGING_TIMEOUT()             = 0;
  84
  85         /* The following parameters should be initialized to the values set by user */
  86         MTO_RATE_LEVEL()                = 0;
  87         MTO_FRAG_TH_LEVEL()             = 4;
  88         MTO_RTS_THRESHOLD()             = MTO_FRAG_TH() + 1;
  89         MTO_RTS_THRESHOLD_SETUP()       = MTO_FRAG_TH() + 1;
  90         MTO_RATE_CHANGE_ENABLE()        = 1;
  91         MTO_FRAG_CHANGE_ENABLE()        = 0;
  92         MTO_POWER_CHANGE_ENABLE()       = 1;
  93         MTO_PREAMBLE_CHANGE_ENABLE()    = 1;
  94         MTO_RTS_CHANGE_ENABLE()         = 0;
  95
  96         for (i = 0; i < MTO_MAX_DATA_RATE_LEVELS; i++)
  97                 retryrate_rec[i] = 5;
  98
  99         MTO_TXFLOWCOUNT() = 0;
 100         /* --------- DTO threshold parameters ------------- */
 101         MTOPARA_PERIODIC_CHECK_CYCLE()          = 10;
 102         MTOPARA_RSSI_TH_FOR_ANTDIV()            = 10;
 103         MTOPARA_TXCOUNT_TH_FOR_CALC_RATE()      = 50;
 104         MTOPARA_TXRATE_INC_TH()                 = 10;
 105         MTOPARA_TXRATE_DEC_TH()                 = 30;
 106         MTOPARA_TXRATE_EQ_TH()                  = 40;
 107         MTOPARA_TXRATE_BACKOFF()                = 12;
 108         MTOPARA_TXRETRYRATE_REDUCE()            = 6;
 109         if (MTO_TXPOWER_FROM_EEPROM == 0xff) {
 110                 switch (MTO_HAL()->phy_type) {
 111                 case RF_AIROHA_2230:
 112                 case RF_AIROHA_2230S:
 113                         MTOPARA_TXPOWER_INDEX() = 46; /* MAX-8 @@ Only for AL 2230 */
 114                         break;
 115                 case RF_AIROHA_7230:
 116                         MTOPARA_TXPOWER_INDEX() = 49;
 117                         break;
 118                 case RF_WB_242:
 119                         MTOPARA_TXPOWER_INDEX() = 10;
 120                         break;
 121                 case RF_WB_242_1:
 122                         MTOPARA_TXPOWER_INDEX() = 24;
 123                         break;
 124                 }
 125         } else { /* follow the setting from EEPROM */
 126                 MTOPARA_TXPOWER_INDEX() = MTO_TXPOWER_FROM_EEPROM;
 127         }
 128         RFSynthesizer_SetPowerIndex(MTO_HAL(), (u8) MTOPARA_TXPOWER_INDEX());
 129         /* ------------------------------------------------ */
 130
 131         /* For RSSI turning -- Cancel load from EEPROM */
 132         MTO_DATA().RSSI_high = -41;
 133         MTO_DATA().RSSI_low = -60;
 134 }
 135
 136 /* ===========================================================================
 137  * Description:
 138  *      If we enable DTO, we will ignore the tx count with different tx rate
 139  *      from DTO rate. This is because when we adjust DTO tx rate, there could
 140  *      be some packets in the tx queue with previous tx rate
 141  */
 142
 143 void MTO_SetTxCount(struct wbsoft_priv *adapter, u8 tx_rate, u8 index)
 144 {
 145         MTO_TXFLOWCOUNT()++;
 146         if ((MTO_ENABLE == 1) && (MTO_RATE_CHANGE_ENABLE() == 1)) {
 147                 if (tx_rate == MTO_DATA_RATE()) {
 148                         if (index == 0) {
 149                                 if (boSparseTxTraffic)
 150                                         MTO_HAL()->dto_tx_frag_count += MTOPARA_PERIODIC_CHECK_CYCLE();
 151                                 else
 152                                         MTO_HAL()->dto_tx_frag_count += 1;
 153                         } else {
 154                                 if (index < 8) {
 155                                         MTO_HAL()->dto_tx_retry_count += index;
 156                                         MTO_HAL()->dto_tx_frag_count += (index + 1);
 157                                 } else {
 158                                         MTO_HAL()->dto_tx_retry_count += 7;
 159                                         MTO_HAL()->dto_tx_frag_count += 7;
 160                                 }
 161                         }
 162                 } else if (MTO_DATA_RATE() > 48 && tx_rate == 48) {
 163                         /* for reducing data rate scheme, do not calculate different data rate. 3 is the reducing data rate at retry. */
 164                         if (index < 3) {
 165                                 MTO_HAL()->dto_tx_retry_count += index;
 166                                 MTO_HAL()->dto_tx_frag_count += (index + 1);
 167                         } else {
 168                                 MTO_HAL()->dto_tx_retry_count += 3;
 169                                 MTO_HAL()->dto_tx_frag_count += 3;
 170                         }
 171
 172                 }
 173         } else {
 174                 MTO_HAL()->dto_tx_retry_count += index;
 175                 MTO_HAL()->dto_tx_frag_count += (index + 1);
 176         }
 177         TotalTxPkt++;
 178         TotalTxPktRetry += (index + 1);
 179
 180         PeriodTotalTxPkt++;
 181         PeriodTotalTxPktRetry += (index + 1);
 182 }