Root/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
30u16 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 */
39static 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 */
44static int retryrate_rec[MTO_MAX_DATA_RATE_LEVELS];
45
46static u8 boSparseTxTraffic;
47
48void MTO_Init(struct wbsoft_priv *adapter);
49void TxRateReductionCtrl(struct wbsoft_priv *adapter);
50void MTO_SetTxCount(struct wbsoft_priv *adapter, u8 t0, u8 index);
51void MTO_TxFailed(struct wbsoft_priv *adapter);
52void 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 */
67void 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
138void 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}
173

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