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mto.c
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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 threshold 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 operation 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 }
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