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 /* this record the retry rate at different data rate */
  44 static int retryrate_rec[MTO_MAX_DATA_RATE_LEVELS];
  45
  46 static u8 boSparseTxTraffic;
  47
  48 void MTO_Init(struct wbsoft_priv *adapter);
  49 void TxRateReductionCtrl(struct wbsoft_priv *adapter);
  50 void MTO_SetTxCount(struct wbsoft_priv *adapter, u8 t0, u8 index);
  51 void MTO_TxFailed(struct wbsoft_priv *adapter);
  52 void hal_get_dto_para(struct wbsoft_priv *adapter, char *buffer);
  53
  54 /*
  55  * ===========================================================================
  56  * MTO_Init --
  57  *
  58  *  Description:
  59  *    Initialize MTO parameters.
  60  *
  61  *    This function should be invoked during system initialization.
  62  *
  63  *  Arguments:
  64  *    adapter      - The pointer to the Miniport adapter Context
  65  * ===========================================================================
  66  */
  67 void MTO_Init(struct wbsoft_priv *adapter)
  68 {
  69         int i;
  70
  71         MTO_PREAMBLE_TYPE() = MTO_PREAMBLE_SHORT;   /* for test */
  72
  73         MTO_CNT_ANT(0)                  = 0;
  74         MTO_CNT_ANT(1)                  = 0;
  75         MTO_SQ_ANT(0)                   = 0;
  76         MTO_SQ_ANT(1)                   = 0;
  77
  78         MTO_AGING_TIMEOUT()             = 0;
  79
  80         /* The following parameters should be initialized to the values set by user */
  81         MTO_RATE_LEVEL()                = 0;
  82         MTO_FRAG_TH_LEVEL()             = 4;
  83         MTO_RTS_THRESHOLD()             = MTO_FRAG_TH() + 1;
  84         MTO_RTS_THRESHOLD_SETUP()       = MTO_FRAG_TH() + 1;
  85         MTO_RATE_CHANGE_ENABLE()        = 1;
  86         MTO_FRAG_CHANGE_ENABLE()        = 0;
  87         MTO_POWER_CHANGE_ENABLE()       = 1;
  88         MTO_PREAMBLE_CHANGE_ENABLE()    = 1;
  89         MTO_RTS_CHANGE_ENABLE()         = 0;
  90
  91         for (i = 0; i < MTO_MAX_DATA_RATE_LEVELS; i++)
  92                 retryrate_rec[i] = 5;
  93
  94         MTO_TXFLOWCOUNT() = 0;
  95         /* --------- DTO threshold parameters ------------- */
  96         MTOPARA_PERIODIC_CHECK_CYCLE()          = 10;
  97         MTOPARA_RSSI_TH_FOR_ANTDIV()            = 10;
  98         MTOPARA_TXCOUNT_TH_FOR_CALC_RATE()      = 50;
  99         MTOPARA_TXRATE_INC_TH()                 = 10;
 100         MTOPARA_TXRATE_DEC_TH()                 = 30;
 101         MTOPARA_TXRATE_EQ_TH()                  = 40;
 102         MTOPARA_TXRATE_BACKOFF()                = 12;
 103         MTOPARA_TXRETRYRATE_REDUCE()            = 6;
 104         if (MTO_TXPOWER_FROM_EEPROM == 0xff) {
 105                 switch (MTO_HAL()->phy_type) {
 106                 case RF_AIROHA_2230:
 107                 case RF_AIROHA_2230S:
 108                         MTOPARA_TXPOWER_INDEX() = 46; /* MAX-8 @@ Only for AL 2230 */
 109                         break;
 110                 case RF_AIROHA_7230:
 111                         MTOPARA_TXPOWER_INDEX() = 49;
 112                         break;
 113                 case RF_WB_242:
 114                         MTOPARA_TXPOWER_INDEX() = 10;
 115                         break;
 116                 case RF_WB_242_1:
 117                         MTOPARA_TXPOWER_INDEX() = 24;
 118                         break;
 119                 }
 120         } else { /* follow the setting from EEPROM */
 121                 MTOPARA_TXPOWER_INDEX() = MTO_TXPOWER_FROM_EEPROM;
 122         }
 123         RFSynthesizer_SetPowerIndex(MTO_HAL(), (u8) MTOPARA_TXPOWER_INDEX());
 124         /* ------------------------------------------------ */
 125
 126         /* For RSSI turning -- Cancel load from EEPROM */
 127         MTO_DATA().RSSI_high = -41;
 128         MTO_DATA().RSSI_low = -60;
 129 }
 130
 131 /* ===========================================================================
 132  * Description:
 133  *      If we enable DTO, we will ignore the tx count with different tx rate
 134  *      from DTO rate. This is because when we adjust DTO tx rate, there could
 135  *      be some packets in the tx queue with previous tx rate
 136  */
 137
 138 void MTO_SetTxCount(struct wbsoft_priv *adapter, u8 tx_rate, u8 index)
 139 {
 140         MTO_TXFLOWCOUNT()++;
 141         if ((MTO_ENABLE == 1) && (MTO_RATE_CHANGE_ENABLE() == 1)) {
 142                 if (tx_rate == MTO_DATA_RATE()) {
 143                         if (index == 0) {
 144                                 if (boSparseTxTraffic)
 145                                         MTO_HAL()->dto_tx_frag_count += MTOPARA_PERIODIC_CHECK_CYCLE();
 146                                 else
 147                                         MTO_HAL()->dto_tx_frag_count += 1;
 148                         } else {
 149                                 if (index < 8) {
 150                                         MTO_HAL()->dto_tx_retry_count += index;
 151                                         MTO_HAL()->dto_tx_frag_count += (index + 1);
 152                                 } else {
 153                                         MTO_HAL()->dto_tx_retry_count += 7;
 154                                         MTO_HAL()->dto_tx_frag_count += 7;
 155                                 }
 156                         }
 157                 } else if (MTO_DATA_RATE() > 48 && tx_rate == 48) {
 158                         /* for reducing data rate scheme, do not calculate different data rate. 3 is the reducing data rate at retry. */
 159                         if (index < 3) {
 160                                 MTO_HAL()->dto_tx_retry_count += index;
 161                                 MTO_HAL()->dto_tx_frag_count += (index + 1);
 162                         } else {
 163                                 MTO_HAL()->dto_tx_retry_count += 3;
 164                                 MTO_HAL()->dto_tx_frag_count += 3;
 165                         }
 166
 167                 }
 168         } else {
 169                 MTO_HAL()->dto_tx_retry_count += index;
 170                 MTO_HAL()->dto_tx_frag_count += (index + 1);
 171         }
 172 }