2 * Copyright (c) 1996, 2003 VIA Networking Technologies, Inc.
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
21 * Purpose: Handles the auto fallback & data rates functions
28 * RATEvParseMaxRate - Parsing the highest basic & support rate in rate field of frame
29 * RATEvTxRateFallBack - Rate fallback Algorithm Implementaion
30 * RATEuSetIE- Set rate IE field.
36 #if !defined(__TTYPE_H__)
39 #if !defined(__TMACRO_H__)
42 #if !defined(__MAC_H__)
45 #if !defined(__80211MGR_H__)
48 #if !defined(__BSSDB_H__)
51 #if !defined(__DATARATE_H__)
54 #if !defined(__CARD_H__)
57 #if !defined(__BASEBAND_H__)
60 #if !defined(__SROM_H__)
64 /*--------------------- Static Definitions -------------------------*/
69 /*--------------------- Static Classes ----------------------------*/
72 extern WORD TxRate_iwconfig; //2008-5-8 <add> by chester
73 /*--------------------- Static Variables --------------------------*/
74 //static int msglevel =MSG_LEVEL_DEBUG;
75 static int msglevel =MSG_LEVEL_INFO;
76 const BYTE acbyIERate[MAX_RATE] =
77 {0x02, 0x04, 0x0B, 0x16, 0x0C, 0x12, 0x18, 0x24, 0x30, 0x48, 0x60, 0x6C};
79 #define AUTORATE_TXOK_CNT 0x0400
80 #define AUTORATE_TXFAIL_CNT 0x0064
81 #define AUTORATE_TIMEOUT 10
83 /*--------------------- Static Functions --------------------------*/
85 VOID s_vResetCounter (
86 IN PKnownNodeDB psNodeDBTable
93 IN PKnownNodeDB psNodeDBTable
98 // clear statistic counter for auto_rate
99 for(ii=0;ii<=MAX_RATE;ii++) {
100 psNodeDBTable->uTxOk[ii] = 0;
101 psNodeDBTable->uTxFail[ii] = 0;
105 /*--------------------- Export Variables --------------------------*/
108 /*--------------------- Export Functions --------------------------*/
114 * Get RateIdx from the value in SuppRates IE or ExtSuppRates IE
118 * BYTE - Rate value in SuppRates IE or ExtSuppRates IE
122 * Return Value: RateIdx
126 DATARATEbyGetRateIdx (
132 //Erase basicRate flag.
133 byRate = byRate & 0x7F;//0111 1111
135 for (ii = 0; ii < MAX_RATE; ii ++) {
136 if (acbyIERate[ii] == byRate)
146 * Routine Description:
147 * Rate fallback Algorithm Implementaion
151 * pDevice - Pointer to the adapter
152 * psNodeDBTable - Pointer to Node Data Base
159 #define AUTORATE_TXCNT_THRESHOLD 20
160 #define AUTORATE_INC_THRESHOLD 30
168 * Get RateIdx from the value in SuppRates IE or ExtSuppRates IE
172 * BYTE - Rate value in SuppRates IE or ExtSuppRates IE
176 * Return Value: RateIdx
186 //Erase basicRate flag.
187 byRate = byRate & 0x7F;//0111 1111
189 for (ii = 0; ii < MAX_RATE; ii ++) {
190 if (acbyIERate[ii] == byRate)
199 * Parsing the highest basic & support rate in rate field of frame.
203 * pDevice - Pointer to the adapter
204 * pItemRates - Pointer to Rate field defined in 802.11 spec.
205 * pItemExtRates - Pointer to Extended Rate field defined in 802.11 spec.
207 * pwMaxBasicRate - Maximum Basic Rate
208 * pwMaxSuppRate - Maximum Supported Rate
209 * pbyTopCCKRate - Maximum Basic Rate in CCK mode
210 * pbyTopOFDMRate - Maximum Basic Rate in OFDM mode
217 IN PVOID pDeviceHandler,
218 IN PWLAN_IE_SUPP_RATES pItemRates,
219 IN PWLAN_IE_SUPP_RATES pItemExtRates,
220 IN BOOL bUpdateBasicRate,
221 OUT PWORD pwMaxBasicRate,
222 OUT PWORD pwMaxSuppRate,
223 OUT PWORD pwSuppRate,
224 OUT PBYTE pbyTopCCKRate,
225 OUT PBYTE pbyTopOFDMRate
228 PSDevice pDevice = (PSDevice) pDeviceHandler;
230 BYTE byHighSuppRate = 0;
232 WORD wOldBasicRate = pDevice->wBasicRate;
236 if (pItemRates == NULL)
240 uRateLen = pItemRates->len;
242 DEVICE_PRT(MSG_LEVEL_DEBUG, KERN_INFO"ParseMaxRate Len: %d\n", uRateLen);
243 if (pDevice->eCurrentPHYType != PHY_TYPE_11B) {
244 if (uRateLen > WLAN_RATES_MAXLEN)
245 uRateLen = WLAN_RATES_MAXLEN;
247 if (uRateLen > WLAN_RATES_MAXLEN_11B)
248 uRateLen = WLAN_RATES_MAXLEN_11B;
251 for (ii = 0; ii < uRateLen; ii++) {
252 byRate = (BYTE)(pItemRates->abyRates[ii]);
253 if (WLAN_MGMT_IS_BASICRATE(byRate) &&
254 (bUpdateBasicRate == TRUE)) {
255 // Add to basic rate set, update pDevice->byTopCCKBasicRate and pDevice->byTopOFDMBasicRate
256 CARDbAddBasicRate((PVOID)pDevice, wGetRateIdx(byRate));
257 DEVICE_PRT(MSG_LEVEL_DEBUG, KERN_INFO"ParseMaxRate AddBasicRate: %d\n", wGetRateIdx(byRate));
259 byRate = (BYTE)(pItemRates->abyRates[ii]&0x7F);
260 if (byHighSuppRate == 0)
261 byHighSuppRate = byRate;
262 if (byRate > byHighSuppRate)
263 byHighSuppRate = byRate;
264 *pwSuppRate |= (1<<wGetRateIdx(byRate));
266 if ((pItemExtRates != NULL) && (pItemExtRates->byElementID == WLAN_EID_EXTSUPP_RATES) &&
267 (pDevice->eCurrentPHYType != PHY_TYPE_11B)) {
269 UINT uExtRateLen = pItemExtRates->len;
271 if (uExtRateLen > WLAN_RATES_MAXLEN)
272 uExtRateLen = WLAN_RATES_MAXLEN;
274 for (ii = 0; ii < uExtRateLen ; ii++) {
275 byRate = (BYTE)(pItemExtRates->abyRates[ii]);
276 // select highest basic rate
277 if (WLAN_MGMT_IS_BASICRATE(pItemExtRates->abyRates[ii])) {
278 // Add to basic rate set, update pDevice->byTopCCKBasicRate and pDevice->byTopOFDMBasicRate
279 CARDbAddBasicRate((PVOID)pDevice, wGetRateIdx(byRate));
280 DEVICE_PRT(MSG_LEVEL_DEBUG, KERN_INFO"ParseMaxRate AddBasicRate: %d\n", wGetRateIdx(byRate));
282 byRate = (BYTE)(pItemExtRates->abyRates[ii]&0x7F);
283 if (byHighSuppRate == 0)
284 byHighSuppRate = byRate;
285 if (byRate > byHighSuppRate)
286 byHighSuppRate = byRate;
287 *pwSuppRate |= (1<<wGetRateIdx(byRate));
288 //DBG_PRN_GRP09(("ParseMaxRate : HighSuppRate: %d, %X\n", wGetRateIdx(byRate), byRate));
290 } //if(pItemExtRates != NULL)
292 if ((pDevice->byPacketType == PK_TYPE_11GB) && CARDbIsOFDMinBasicRate((PVOID)pDevice)) {
293 pDevice->byPacketType = PK_TYPE_11GA;
296 *pbyTopCCKRate = pDevice->byTopCCKBasicRate;
297 *pbyTopOFDMRate = pDevice->byTopOFDMBasicRate;
298 *pwMaxSuppRate = wGetRateIdx(byHighSuppRate);
299 if ((pDevice->byPacketType==PK_TYPE_11B) || (pDevice->byPacketType==PK_TYPE_11GB))
300 *pwMaxBasicRate = pDevice->byTopCCKBasicRate;
302 *pwMaxBasicRate = pDevice->byTopOFDMBasicRate;
303 if (wOldBasicRate != pDevice->wBasicRate)
304 CARDvSetRSPINF((PVOID)pDevice, pDevice->eCurrentPHYType);
306 DEVICE_PRT(MSG_LEVEL_DEBUG, KERN_INFO"Exit ParseMaxRate\n");
312 * Routine Description:
313 * Rate fallback Algorithm Implementaion
317 * pDevice - Pointer to the adapter
318 * psNodeDBTable - Pointer to Node Data Base
325 #define AUTORATE_TXCNT_THRESHOLD 20
326 #define AUTORATE_INC_THRESHOLD 30
329 RATEvTxRateFallBack (
330 IN PVOID pDeviceHandler,
331 IN PKnownNodeDB psNodeDBTable
334 PSDevice pDevice = (PSDevice) pDeviceHandler;
335 WORD wIdxDownRate = 0;
337 //DWORD dwRateTable[MAX_RATE] = {1, 2, 5, 11, 6, 9, 12, 18, 24, 36, 48, 54};
338 BOOL bAutoRate[MAX_RATE] = {TRUE,TRUE,TRUE,TRUE,FALSE,FALSE,TRUE,TRUE,TRUE,TRUE,TRUE,TRUE};
339 DWORD dwThroughputTbl[MAX_RATE] = {10, 20, 55, 110, 60, 90, 120, 180, 240, 360, 480, 540};
340 DWORD dwThroughput = 0;
344 if (pDevice->pMgmt->eScanState != WMAC_NO_SCANNING) {
345 // Don't do Fallback when scanning Channel
349 psNodeDBTable->uTimeCount ++;
351 if (psNodeDBTable->uTxFail[MAX_RATE] > psNodeDBTable->uTxOk[MAX_RATE])
352 dwTxDiff = psNodeDBTable->uTxFail[MAX_RATE] - psNodeDBTable->uTxOk[MAX_RATE];
354 if ((psNodeDBTable->uTxOk[MAX_RATE] < AUTORATE_TXOK_CNT) &&
355 (dwTxDiff < AUTORATE_TXFAIL_CNT) &&
356 (psNodeDBTable->uTimeCount < AUTORATE_TIMEOUT)) {
360 if (psNodeDBTable->uTimeCount >= AUTORATE_TIMEOUT) {
361 psNodeDBTable->uTimeCount = 0;
365 for(ii=0;ii<MAX_RATE;ii++) {
366 if (psNodeDBTable->wSuppRate & (0x0001<<ii)) {
367 if (bAutoRate[ii] == TRUE) {
368 wIdxUpRate = (WORD) ii;
371 bAutoRate[ii] = FALSE;
375 for(ii=0;ii<=psNodeDBTable->wTxDataRate;ii++) {
376 if ( (psNodeDBTable->uTxOk[ii] != 0) ||
377 (psNodeDBTable->uTxFail[ii] != 0) ) {
378 dwThroughputTbl[ii] *= psNodeDBTable->uTxOk[ii];
380 psNodeDBTable->uTxFail[ii] *= 4;
382 dwThroughputTbl[ii] /= (psNodeDBTable->uTxOk[ii] + psNodeDBTable->uTxFail[ii]);
384 // DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"Rate %d,Ok: %d, Fail:%d, Throughput:%d\n",
385 // ii, psNodeDBTable->uTxOk[ii], psNodeDBTable->uTxFail[ii], dwThroughputTbl[ii]);
387 dwThroughput = dwThroughputTbl[psNodeDBTable->wTxDataRate];
389 wIdxDownRate = psNodeDBTable->wTxDataRate;
390 for(ii = psNodeDBTable->wTxDataRate; ii > 0;) {
392 if ( (dwThroughputTbl[ii] > dwThroughput) &&
393 (bAutoRate[ii]==TRUE) ) {
394 dwThroughput = dwThroughputTbl[ii];
395 wIdxDownRate = (WORD) ii;
398 psNodeDBTable->wTxDataRate = wIdxDownRate;
399 if (psNodeDBTable->uTxOk[MAX_RATE]) {
400 if (psNodeDBTable->uTxOk[MAX_RATE] >
401 (psNodeDBTable->uTxFail[MAX_RATE] * 4) ) {
402 psNodeDBTable->wTxDataRate = wIdxUpRate;
404 }else { // adhoc, if uTxOk =0 & uTxFail = 0
405 if (psNodeDBTable->uTxFail[MAX_RATE] == 0)
406 psNodeDBTable->wTxDataRate = wIdxUpRate;
408 //2008-5-8 <add> by chester
409 TxRate_iwconfig=psNodeDBTable->wTxDataRate;
410 s_vResetCounter(psNodeDBTable);
411 // DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"Rate: %d, U:%d, D:%d\n", psNodeDBTable->wTxDataRate, wIdxUpRate, wIdxDownRate);
420 * This routine is used to assemble available Rate IE.
432 IN PWLAN_IE_SUPP_RATES pSrcRates,
433 IN PWLAN_IE_SUPP_RATES pDstRates,
437 UINT ii, uu, uRateCnt = 0;
439 if ((pSrcRates == NULL) || (pDstRates == NULL))
442 if (pSrcRates->len == 0)
445 for (ii = 0; ii < uRateLen; ii++) {
446 for (uu = 0; uu < pSrcRates->len; uu++) {
447 if ((pSrcRates->abyRates[uu] & 0x7F) == acbyIERate[ii]) {
448 pDstRates->abyRates[uRateCnt ++] = pSrcRates->abyRates[uu];
453 return (BYTE)uRateCnt;