2 ** $Id: //Department/DaVinci/BRANCHES/MT662X_593X_WIFI_DRIVER_V2_3/mgmt/rate.c#1 $
6 \brief This file contains the transmission rate handling routines.
8 This file contains the transmission rate handling routines for setting up
9 ACK/CTS Rate, Highest Tx Rate, Lowest Tx Rate, Initial Tx Rate and do
10 conversion between Rate Set and Data Rates.
13 /*******************************************************************************
14 * Copyright (c) 2007 MediaTek Inc.
16 * All rights reserved. Copying, compilation, modification, distribution
17 * or any other use whatsoever of this material is strictly prohibited
18 * except in accordance with a Software License Agreement with
20 ********************************************************************************
23 /*******************************************************************************
26 * BY OPENING THIS FILE, BUYER HEREBY UNEQUIVOCALLY ACKNOWLEDGES AND
27 * AGREES THAT THE SOFTWARE/FIRMWARE AND ITS DOCUMENTATIONS ("MEDIATEK
28 * SOFTWARE") RECEIVED FROM MEDIATEK AND/OR ITS REPRESENTATIVES ARE
29 * PROVIDED TO BUYER ON AN "AS-IS" BASIS ONLY. MEDIATEK EXPRESSLY
30 * DISCLAIMS ANY AND ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT
31 * LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
32 * PARTICULAR PURPOSE OR NONINFRINGEMENT. NEITHER DOES MEDIATEK PROVIDE
33 * ANY WARRANTY WHATSOEVER WITH RESPECT TO THE SOFTWARE OF ANY THIRD PARTY
34 * WHICH MAY BE USED BY, INCORPORATED IN, OR SUPPLIED WITH THE MEDIATEK
35 * SOFTWARE, AND BUYER AGREES TO LOOK ONLY TO SUCH THIRD PARTY FOR ANY
36 * WARRANTY CLAIM RELATING THERETO. MEDIATEK SHALL ALSO NOT BE RESPONSIBLE
37 * FOR ANY MEDIATEK SOFTWARE RELEASES MADE TO BUYER'S SPECIFICATION OR TO
38 * CONFORM TO A PARTICULAR STANDARD OR OPEN FORUM.
40 * BUYER'S SOLE AND EXCLUSIVE REMEDY AND MEDIATEK'S ENTIRE AND CUMULATIVE
41 * LIABILITY WITH RESPECT TO THE MEDIATEK SOFTWARE RELEASED HEREUNDER WILL
42 * BE, AT MEDIATEK'S OPTION, TO REVISE OR REPLACE THE MEDIATEK SOFTWARE AT
43 * ISSUE, OR REFUND ANY SOFTWARE LICENSE FEES OR SERVICE CHARGE PAID BY
44 * BUYER TO MEDIATEK FOR SUCH MEDIATEK SOFTWARE AT ISSUE.
46 * THE TRANSACTION CONTEMPLATED HEREUNDER SHALL BE CONSTRUED IN ACCORDANCE
47 * WITH THE LAWS OF THE STATE OF CALIFORNIA, USA, EXCLUDING ITS CONFLICT
48 * OF LAWS PRINCIPLES. ANY DISPUTES, CONTROVERSIES OR CLAIMS ARISING
49 * THEREOF AND RELATED THERETO SHALL BE SETTLED BY ARBITRATION IN SAN
50 * FRANCISCO, CA, UNDER THE RULES OF THE INTERNATIONAL CHAMBER OF COMMERCE
52 ********************************************************************************
60 * [WPD00003833] [MT6620 and MT5931] Driver migration - move to new repository.
63 * [WPD00003833][MT6620 and MT5931] Driver migration
66 * 03 16 2010 kevin.huang
67 * [BORA00000663][WIFISYS][New Feature] AdHoc Mode Support
71 * [BORA00000018]Integrate WIFI part into BORA for the 1st time
74 * Nov 23 2009 mtk01461
75 * [BORA00000018] Integrate WIFI part into BORA for the 1st time
78 * Nov 16 2009 mtk01461
79 * [BORA00000018] Integrate WIFI part into BORA for the 1st time
83 * [BORA00000018] Integrate WIFI part into BORA for the 1st time
85 ** \main\maintrunk.MT5921\12 2008-12-19 17:19:32 GMT mtk01461
86 ** Fix the problem that do not ASSERT the length of Supported Rate IE == 8
87 ** \main\maintrunk.MT5921\11 2008-12-01 18:17:42 GMT mtk01088
88 ** fixed the lint "possible using null pointer" warning
89 ** \main\maintrunk.MT5921\10 2008-08-20 00:16:36 GMT mtk01461
90 ** Update for Driver Review
91 ** \main\maintrunk.MT5921\9 2008-04-13 21:17:13 GMT mtk01461
92 ** Revise GEN Link Speed OID
93 ** \main\maintrunk.MT5921\8 2008-03-28 10:40:13 GMT mtk01461
94 ** Add rateGetRateSetFromDataRates() for set desired rate OID
95 ** \main\maintrunk.MT5921\7 2008-03-26 09:16:20 GMT mtk01461
96 ** Add adopt operational rate as ACK rate if BasicRateSet was not found
98 ** \main\maintrunk.MT5921\6 2008-02-21 15:01:39 GMT mtk01461
99 ** Add initial rate according rx signal quality support
100 ** \main\maintrunk.MT5921\5 2008-01-07 15:06:44 GMT mtk01461
101 ** Fix typo of rate adaptation of CtrlResp Frame
102 ** \main\maintrunk.MT5921\4 2007-10-25 18:05:12 GMT mtk01461
103 ** Add VOIP SCAN Support & Refine Roaming
106 /*******************************************************************************
107 * C O M P I L E R F L A G S
108 ********************************************************************************
111 /*******************************************************************************
112 * E X T E R N A L R E F E R E N C E S
113 ********************************************************************************
117 /*******************************************************************************
119 ********************************************************************************
121 /* The list of valid data rates. */
122 const UINT_8 aucDataRate[] = {
123 RATE_1M, /* RATE_1M_INDEX = 0 */
124 RATE_2M, /* RATE_2M_INDEX */
125 RATE_5_5M, /* RATE_5_5M_INDEX */
126 RATE_11M, /* RATE_11M_INDEX */
127 RATE_22M, /* RATE_22M_INDEX */
128 RATE_33M, /* RATE_33M_INDEX */
129 RATE_6M, /* RATE_6M_INDEX */
130 RATE_9M, /* RATE_9M_INDEX */
131 RATE_12M, /* RATE_12M_INDEX */
132 RATE_18M, /* RATE_18M_INDEX */
133 RATE_24M, /* RATE_24M_INDEX */
134 RATE_36M, /* RATE_36M_INDEX */
135 RATE_48M, /* RATE_48M_INDEX */
136 RATE_54M, /* RATE_54M_INDEX */
137 RATE_HT_PHY /* RATE_HT_PHY_INDEX */
140 static const UINT_8 aucDefaultAckCtsRateIndex[RATE_NUM] = {
141 RATE_1M_INDEX, /* RATE_1M_INDEX = 0 */
142 RATE_2M_INDEX, /* RATE_2M_INDEX */
143 RATE_5_5M_INDEX, /* RATE_5_5M_INDEX */
144 RATE_11M_INDEX, /* RATE_11M_INDEX */
145 RATE_1M_INDEX, /* RATE_22M_INDEX - Not supported */
146 RATE_1M_INDEX, /* RATE_33M_INDEX - Not supported */
147 RATE_6M_INDEX, /* RATE_6M_INDEX */
148 RATE_6M_INDEX, /* RATE_9M_INDEX */
149 RATE_12M_INDEX, /* RATE_12M_INDEX */
150 RATE_12M_INDEX, /* RATE_18M_INDEX */
151 RATE_24M_INDEX, /* RATE_24M_INDEX */
152 RATE_24M_INDEX, /* RATE_36M_INDEX */
153 RATE_24M_INDEX, /* RATE_48M_INDEX */
154 RATE_24M_INDEX /* RATE_54M_INDEX */
157 const BOOLEAN afgIsOFDMRate[RATE_NUM] = {
158 FALSE, /* RATE_1M_INDEX = 0 */
159 FALSE, /* RATE_2M_INDEX */
160 FALSE, /* RATE_5_5M_INDEX */
161 FALSE, /* RATE_11M_INDEX */
162 FALSE, /* RATE_22M_INDEX - Not supported */
163 FALSE, /* RATE_33M_INDEX - Not supported */
164 TRUE, /* RATE_6M_INDEX */
165 TRUE, /* RATE_9M_INDEX */
166 TRUE, /* RATE_12M_INDEX */
167 TRUE, /* RATE_18M_INDEX */
168 TRUE, /* RATE_24M_INDEX */
169 TRUE, /* RATE_36M_INDEX */
170 TRUE, /* RATE_48M_INDEX */
171 TRUE /* RATE_54M_INDEX */
174 /*******************************************************************************
176 ********************************************************************************
179 /*******************************************************************************
180 * P U B L I C D A T A
181 ********************************************************************************
184 /*******************************************************************************
185 * P R I V A T E D A T A
186 ********************************************************************************
189 /*******************************************************************************
191 ********************************************************************************
194 /*******************************************************************************
195 * F U N C T I O N D E C L A R A T I O N S
196 ********************************************************************************
199 /*******************************************************************************
201 ********************************************************************************
203 /*----------------------------------------------------------------------------*/
205 * @brief Convert the given Supported Rate & Extended Supported Rate IE to the
206 * Operational Rate Set and Basic Rate Set, and also check if any Basic
207 * Rate Code is unknown by driver.
209 * @param[in] prIeSupportedRate Pointer to the Supported Rate IE
210 * @param[in] prIeExtSupportedRate Pointer to the Ext Supported Rate IE
211 * @param[out] pu2OperationalRateSet Pointer to the Operational Rate Set
212 * @param[out] pu2BSSBasicRateSet Pointer to the Basic Rate Set
213 * @param[out] pfgIsUnknownBSSBasicRate Pointer to a Flag to indicate that Basic
214 * Rate Set has unknown Rate Code
218 /*----------------------------------------------------------------------------*/
220 rateGetRateSetFromIEs (
221 IN P_IE_SUPPORTED_RATE_T prIeSupportedRate,
222 IN P_IE_EXT_SUPPORTED_RATE_T prIeExtSupportedRate,
223 OUT PUINT_16 pu2OperationalRateSet,
224 OUT PUINT_16 pu2BSSBasicRateSet,
225 OUT PBOOLEAN pfgIsUnknownBSSBasicRate
228 UINT_16 u2OperationalRateSet = 0;
229 UINT_16 u2BSSBasicRateSet = 0;
230 BOOLEAN fgIsUnknownBSSBasicRate = FALSE;
235 ASSERT(pu2OperationalRateSet);
236 ASSERT(pu2BSSBasicRateSet);
237 ASSERT(pfgIsUnknownBSSBasicRate);
239 if (prIeSupportedRate) {
240 /* NOTE(Kevin): Buffalo WHR-G54S's supported rate set IE exceed 8.
241 * IE_LEN(pucIE) == 12, "1(B), 2(B), 5.5(B), 6(B), 9(B), 11(B),
242 * 12(B), 18(B), 24(B), 36(B), 48(B), 54(B)"
244 //ASSERT(prIeSupportedRate->ucLength <= ELEM_MAX_LEN_SUP_RATES);
245 ASSERT(prIeSupportedRate->ucLength <= RATE_NUM);
247 for (i = 0; i < prIeSupportedRate->ucLength; i++) {
248 ucRate = prIeSupportedRate->aucSupportedRates[i] & RATE_MASK;
250 /* Search all valid data rates */
251 for (j = 0; j < sizeof(aucDataRate)/sizeof(UINT_8); j++) {
252 if (ucRate == aucDataRate[j]) {
253 u2OperationalRateSet |= BIT(j);
255 if (prIeSupportedRate->aucSupportedRates[i] & RATE_BASIC_BIT) {
256 u2BSSBasicRateSet |= BIT(j);
263 if ((j == sizeof(aucDataRate)/sizeof(UINT_8)) &&
264 (prIeSupportedRate->aucSupportedRates[i] & RATE_BASIC_BIT)) {
265 fgIsUnknownBSSBasicRate = TRUE; /* A data rate not list in the aucDataRate[] */
271 if (prIeExtSupportedRate) {
272 //ASSERT(prIeExtSupportedRate->ucLength <= ELEM_MAX_LEN_EXTENDED_SUP_RATES);
274 for (i = 0; i < prIeExtSupportedRate->ucLength; i++) {
275 ucRate = prIeExtSupportedRate->aucExtSupportedRates[i] & RATE_MASK;
277 /* Search all valid data rates */
278 for (j = 0; j < sizeof(aucDataRate)/sizeof(UINT_8); j++) {
279 if (ucRate == aucDataRate[j]) {
280 u2OperationalRateSet |= BIT(j);
282 if (prIeExtSupportedRate->aucExtSupportedRates[i] & RATE_BASIC_BIT) {
283 u2BSSBasicRateSet |= BIT(j);
290 if ((j == sizeof(aucDataRate)/sizeof(UINT_8)) &&
291 (prIeExtSupportedRate->aucExtSupportedRates[i] & RATE_BASIC_BIT)) {
292 fgIsUnknownBSSBasicRate = TRUE; /* A data rate not list in the aucDataRate[] */
297 *pu2OperationalRateSet = u2OperationalRateSet;
298 *pu2BSSBasicRateSet = u2BSSBasicRateSet;
299 *pfgIsUnknownBSSBasicRate = fgIsUnknownBSSBasicRate;
303 } /* end of rateGetRateSetFromIEs() */
306 /*----------------------------------------------------------------------------*/
308 * @brief Convert the given Operational Rate Set & Basic Rate Set to the Rate Code
309 * Format for used in (Ext)Supportec Rate IE.
311 * @param[in] u2OperationalRateSet Operational Rate Set
312 * @param[in] u2BSSBasicRateSet Basic Rate Set
313 * @param[out] pucDataRates Pointer to the Data Rate Buffer
314 * @param[out] pucDataRatesLen Pointer to the Data Rate Buffer Length
318 /*----------------------------------------------------------------------------*/
320 rateGetDataRatesFromRateSet (
321 IN UINT_16 u2OperationalRateSet,
322 IN UINT_16 u2BSSBasicRateSet,
323 OUT PUINT_8 pucDataRates,
324 OUT PUINT_8 pucDataRatesLen
330 ASSERT(pucDataRates);
331 ASSERT(pucDataRatesLen);
333 ASSERT(u2BSSBasicRateSet == (u2OperationalRateSet & u2BSSBasicRateSet));
335 for (i = RATE_1M_INDEX, j = 0; i < RATE_NUM; i++) {
336 if (u2OperationalRateSet & BIT(i)) {
338 *(pucDataRates + j) = aucDataRate[i];
340 if (u2BSSBasicRateSet & BIT(i)) {
341 *(pucDataRates + j) |= RATE_BASIC_BIT;
348 *pucDataRatesLen = (UINT_8)j;
352 } /* end of rateGetDataRatesFromRateSet() */
355 /*----------------------------------------------------------------------------*/
357 * \brief Get the highest rate from given Rate Set.
359 * \param[in] u2RateSet Rate Set
360 * \param[out] pucHighestRateIndex Pointer to buffer of the Highest Rate Index
362 * \retval TRUE Highest Rate Index was found
363 * \retval FALSE Highest Rate Index was not found
365 /*----------------------------------------------------------------------------*/
367 rateGetHighestRateIndexFromRateSet (
368 IN UINT_16 u2RateSet,
369 OUT PUINT_8 pucHighestRateIndex
375 ASSERT(pucHighestRateIndex);
377 for (i = RATE_54M_INDEX; i >= RATE_1M_INDEX; i--) {
378 if (u2RateSet & BIT(i)) {
379 *pucHighestRateIndex = (UINT_8)i;
386 } /* end of rateGetHighestRateIndexFromRateSet() */
389 /*----------------------------------------------------------------------------*/
391 * \brief Get the lowest rate from given Rate Set.
393 * \param[in] u2RateSet Rate Set
394 * \param[out] pucLowestRateIndex Pointer to buffer of the Lowest Rate Index
396 * \retval TRUE Lowest Rate Index was found
397 * \retval FALSE Lowest Rate Index was not found
399 /*----------------------------------------------------------------------------*/
401 rateGetLowestRateIndexFromRateSet (
402 IN UINT_16 u2RateSet,
403 OUT PUINT_8 pucLowestRateIndex
408 ASSERT(pucLowestRateIndex);
410 for (i = RATE_1M_INDEX; i <= RATE_54M_INDEX; i++) {
411 if (u2RateSet & BIT(i)) {
412 *pucLowestRateIndex = (UINT_8)i;
419 } /* end of rateGetLowestRateIndexFromRateSet() */
422 #if 0 // NOTE(Kevin): For reference
423 /*----------------------------------------------------------------------------*/
425 * \brief Convert the given Data Rates to the Rate Set.
427 * \param[in] pucDataRates Pointer to the Data Rates
428 * \param[in] ucDataRatesLen Length of given Data Rates
429 * \param[out] pu2RateSet Pointer to the Rate Set
433 /*----------------------------------------------------------------------------*/
435 rateGetRateSetFromDataRates (
436 IN PUINT_8 pucDataRates,
437 IN UINT_8 ucDataRatesLen,
438 OUT PUINT_16 pu2RateSet
441 UINT_16 u2RateSet = 0;
446 ASSERT(pucDataRates);
450 for (i = 0; i < ucDataRatesLen; i++) {
451 ucRate = pucDataRates[i] & RATE_MASK;
453 /* Search all valid data rates */
454 for (j = 0; j < sizeof(aucDataRate)/sizeof(UINT_8); j++) {
455 if (ucRate == aucDataRate[j]) {
463 *pu2RateSet = u2RateSet;
467 } /* end of rateGetRateSetFromDataRates() */
470 /*----------------------------------------------------------------------------*/
472 * \brief Parse the Operational Rate Set and Basic Rate Set to get the corresponding
473 * ACK/CTS(Respnose) TX Rates.
475 * \param[in] u2OperationalRateSet Operational Rate Set
476 * \param[in] u2BSSBasicRateSet Basic Rate Set
477 * \param[out] aucAckCtsRateIndex Pointer to the Ack/Cts Data Rate Buffer
481 /*----------------------------------------------------------------------------*/
483 rateSetAckCtsDataRatesFromRateSet (
484 IN UINT_16 u2OperationalRateSet,
485 IN UINT_16 u2BSSBasicRateSet,
486 IN OUT UINT_8 aucAckCtsRateIndex[]
492 ASSERT(aucAckCtsRateIndex);
493 ASSERT(u2BSSBasicRateSet == (u2OperationalRateSet & u2BSSBasicRateSet));
495 /* Setup default ACK/CTS response rate */
496 kalMemCopy(aucAckCtsRateIndex, (PVOID)aucDefaultAckCtsRateIndex, sizeof(aucDefaultAckCtsRateIndex));
499 for (i = RATE_54M_INDEX; i >= RATE_1M_INDEX; i--) {
500 if (u2OperationalRateSet & BIT(i)) {
501 for (j = i; j >= RATE_1M_INDEX; j--) {
502 if (u2BSSBasicRateSet & BIT(j)) {
503 if ((afgIsOFDMRate[i] && afgIsOFDMRate[j]) || (!afgIsOFDMRate[i] && !afgIsOFDMRate[j])) // Reply ACK Frame at the same Modulation Scheme.
504 aucAckCtsRateIndex[i] = (UINT_8)j;
509 /* NOTE(Kevin 2008/03/25): Following code is used for those AP which has
511 * e.g. If input Operational Rate Set = [18M 12M 9M], Basic Rate Set = NULL.
512 * Originally we'll get Ack Rate for [18M 12M 9M] is [12M 12M "6M"].
513 * Now we'll get Ack Rate for [18M 12M 9M] is [12M 12M 9M],
514 * The Ack Rate for Tx Rates which are not list in Operational Rate Set is still
515 * use highest mandatory rate as default.
517 if (j < RATE_1M_INDEX) { /* The ACK/CTS rate was not found in BasicRateSet */
518 if (!(BIT(aucAckCtsRateIndex[i]) & u2OperationalRateSet)) {
519 aucAckCtsRateIndex[i] = (UINT_8)i;
527 } /* end of rateSetAckCtsDataRatesFromRateSet() */
530 /*----------------------------------------------------------------------------*/
532 * \brief Get the proper initial rate from Rate Set according to given RCPI value
534 * \param[in] u2RateSet Rate Set
535 * \param[in] rRcpi RCPI value from AP or Peer STA
536 * \param[out] pucInitialRateIndex Pointer to buffer of the initial Rate Index
538 * \retval TRUE Initial Rate Index was found
539 * \retval FALSE Initial Rate Index was not found
541 /*----------------------------------------------------------------------------*/
543 rateGetBestInitialRateIndex (
544 IN UINT_16 u2RateSet,
546 OUT PUINT_8 pucInitialRateIndex
549 UINT_16 u2InitRateSet;
553 ASSERT(pucInitialRateIndex);
555 DBGLOG(MGT, TRACE, ("rRcpi = %d\n", rRcpi));
557 if (rRcpi >= RCPI_100) { /* Best Signal */
558 u2InitRateSet = INITIAL_RATE_SET(RCPI_100);
560 else if (rRcpi >= RCPI_80) { /* Better Signal */
561 u2InitRateSet = INITIAL_RATE_SET(RCPI_80);
563 else if (rRcpi >= RCPI_60) { /* Good Signal */
564 u2InitRateSet = INITIAL_RATE_SET(RCPI_60);
566 else { /* Worse Signal */
567 /* NOTE(Kevin): If return FALSE, we should assign the BSS Basic Rate Index
568 * (prBssInfo->ucBasicRateIndex) to the initial rate. It was determined in
569 * function - bssUpdateTxRateForControlFrame().
574 u2RateSet &= u2InitRateSet;
576 for (i = RATE_54M_INDEX; i >= RATE_1M_INDEX; i--) {
577 if (u2RateSet & BIT(i)) {
578 *pucInitialRateIndex = (UINT_8)i;
585 } /* end of rateGetBestInitialRateIndex() */