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 #include "mto.h"
  25
  26 /* Declare SQ3 to rate and fragmentation threshold table */
  27 /* Declare fragmentation threshold table */
  28 #define MTO_MAX_FRAG_TH_LEVELS          5
  29 #define MTO_MAX_DATA_RATE_LEVELS        12
  30
  31 u16 MTO_Frag_Th_Tbl[MTO_MAX_FRAG_TH_LEVELS] = {
  32         256, 384, 512, 768, 1536
  33 };
  34
  35 /*
  36  * Declare data rate table:
  37  * The following table will be changed at anytime if the operation rate
  38  * supported by AP don't match the table
  39  */
  40 static u8 MTO_Data_Rate_Tbl[MTO_MAX_DATA_RATE_LEVELS] = {
  41         2, 4, 11, 22, 12, 18, 24, 36, 48, 72, 96, 108
  42 };
  43
  44 /* this record the retry rate at different data rate */
  45 static int retryrate_rec[MTO_MAX_DATA_RATE_LEVELS];
  46
  47 static u8 boSparseTxTraffic;
  48
  49 /*
  50  * ===========================================================================
  51  * MTO_Init --
  52  *
  53  *  Description:
  54  *    Initialize MTO parameters.
  55  *
  56  *    This function should be invoked during system initialization.
  57  *
  58  *  Arguments:
  59  *    adapter      - The pointer to the Miniport adapter Context
  60  * ===========================================================================
  61  */
  62 void MTO_Init(struct wbsoft_priv *adapter)
  63 {
  64         int i;
  65
  66         MTO_PREAMBLE_TYPE() = MTO_PREAMBLE_SHORT;   /* for test */
  67
  68         MTO_CNT_ANT(0)                  = 0;
  69         MTO_CNT_ANT(1)                  = 0;
  70         MTO_SQ_ANT(0)                   = 0;
  71         MTO_SQ_ANT(1)                   = 0;
  72
  73         MTO_AGING_TIMEOUT()             = 0;
  74
  75         /* The following parameters should be initialized to the values set by user */
  76         MTO_RATE_LEVEL()                = 0;
  77         MTO_FRAG_TH_LEVEL()             = 4;
  78         MTO_RTS_THRESHOLD()             = MTO_FRAG_TH() + 1;
  79         MTO_RTS_THRESHOLD_SETUP()       = MTO_FRAG_TH() + 1;
  80         MTO_RATE_CHANGE_ENABLE()        = 1;
  81         MTO_FRAG_CHANGE_ENABLE()        = 0;
  82         MTO_POWER_CHANGE_ENABLE()       = 1;
  83         MTO_PREAMBLE_CHANGE_ENABLE()    = 1;
  84         MTO_RTS_CHANGE_ENABLE()         = 0;
  85
  86         for (i = 0; i < MTO_MAX_DATA_RATE_LEVELS; i++)
  87                 retryrate_rec[i] = 5;
  88
  89         MTO_TXFLOWCOUNT() = 0;
  90         /* --------- DTO threshold parameters ------------- */
  91         MTOPARA_PERIODIC_CHECK_CYCLE()          = 10;
  92         MTOPARA_RSSI_TH_FOR_ANTDIV()            = 10;
  93         MTOPARA_TXCOUNT_TH_FOR_CALC_RATE()      = 50;
  94         MTOPARA_TXRATE_INC_TH()                 = 10;
  95         MTOPARA_TXRATE_DEC_TH()                 = 30;
  96         MTOPARA_TXRATE_EQ_TH()                  = 40;
  97         MTOPARA_TXRATE_BACKOFF()                = 12;
  98         MTOPARA_TXRETRYRATE_REDUCE()            = 6;
  99         if (MTO_TXPOWER_FROM_EEPROM == 0xff) {
 100                 switch (MTO_HAL()->phy_type) {
 101                 case RF_AIROHA_2230:
 102                 case RF_AIROHA_2230S:
 103                         MTOPARA_TXPOWER_INDEX() = 46; /* MAX-8 @@ Only for AL 2230 */
 104                         break;
 105                 case RF_AIROHA_7230:
 106                         MTOPARA_TXPOWER_INDEX() = 49;
 107                         break;
 108                 case RF_WB_242:
 109                         MTOPARA_TXPOWER_INDEX() = 10;
 110                         break;
 111                 case RF_WB_242_1:
 112                         MTOPARA_TXPOWER_INDEX() = 24;
 113                         break;
 114                 }
 115         } else { /* follow the setting from EEPROM */
 116                 MTOPARA_TXPOWER_INDEX() = MTO_TXPOWER_FROM_EEPROM;
 117         }
 118         RFSynthesizer_SetPowerIndex(MTO_HAL(), (u8) MTOPARA_TXPOWER_INDEX());
 119         /* ------------------------------------------------ */
 120
 121         /* For RSSI turning -- Cancel load from EEPROM */
 122         MTO_DATA().RSSI_high = -41;
 123         MTO_DATA().RSSI_low = -60;
 124 }
 125
 126 /* ===========================================================================
 127  * Description:
 128  *      If we enable DTO, we will ignore the tx count with different tx rate
 129  *      from DTO rate. This is because when we adjust DTO tx rate, there could
 130  *      be some packets in the tx queue with previous tx rate
 131  */
 132
 133 void MTO_SetTxCount(struct wbsoft_priv *adapter, u8 tx_rate, u8 index)
 134 {
 135         MTO_TXFLOWCOUNT()++;
 136         if ((MTO_ENABLE == 1) && (MTO_RATE_CHANGE_ENABLE() == 1)) {
 137                 if (tx_rate == MTO_DATA_RATE()) {
 138                         if (index == 0) {
 139                                 if (boSparseTxTraffic)
 140                                         MTO_HAL()->dto_tx_frag_count += MTOPARA_PERIODIC_CHECK_CYCLE();
 141                                 else
 142                                         MTO_HAL()->dto_tx_frag_count += 1;
 143                         } else {
 144                                 if (index < 8) {
 145                                         MTO_HAL()->dto_tx_retry_count += index;
 146                                         MTO_HAL()->dto_tx_frag_count += (index + 1);
 147                                 } else {
 148                                         MTO_HAL()->dto_tx_retry_count += 7;
 149                                         MTO_HAL()->dto_tx_frag_count += 7;
 150                                 }
 151                         }
 152                 } else if (MTO_DATA_RATE() > 48 && tx_rate == 48) {
 153                         /* for reducing data rate scheme, do not calculate different data rate. 3 is the reducing data rate at retry. */
 154                         if (index < 3) {
 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 += 3;
 159                                 MTO_HAL()->dto_tx_frag_count += 3;
 160                         }
 161
 162                 }
 163         } else {
 164                 MTO_HAL()->dto_tx_retry_count += index;
 165                 MTO_HAL()->dto_tx_frag_count += (index + 1);
 166         }
 167 }