Forest Bond | 5449c68 | 2009-04-25 10:30:44 -0400 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 1996, 2003 VIA Networking Technologies, Inc. |
| 3 | * All rights reserved. |
| 4 | * |
| 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. |
| 9 | * |
| 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. |
| 14 | * |
| 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. |
| 18 | * |
| 19 | * File: datarate.c |
| 20 | * |
| 21 | * Purpose: Handles the auto fallback & data rates functions |
| 22 | * |
| 23 | * Author: Lyndon Chen |
| 24 | * |
| 25 | * Date: July 17, 2002 |
| 26 | * |
| 27 | * 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. |
| 31 | * |
| 32 | * Revision History: |
| 33 | * |
| 34 | */ |
| 35 | |
| 36 | #if !defined(__TTYPE_H__) |
| 37 | #include "ttype.h" |
| 38 | #endif |
| 39 | #if !defined(__TMACRO_H__) |
| 40 | #include "tmacro.h" |
| 41 | #endif |
| 42 | #if !defined(__MAC_H__) |
| 43 | #include "mac.h" |
| 44 | #endif |
| 45 | #if !defined(__80211MGR_H__) |
| 46 | #include "80211mgr.h" |
| 47 | #endif |
| 48 | #if !defined(__BSSDB_H__) |
| 49 | #include "bssdb.h" |
| 50 | #endif |
| 51 | #if !defined(__DATARATE_H__) |
| 52 | #include "datarate.h" |
| 53 | #endif |
| 54 | #if !defined(__CARD_H__) |
| 55 | #include "card.h" |
| 56 | #endif |
| 57 | #if !defined(__BASEBAND_H__) |
| 58 | #include "baseband.h" |
| 59 | #endif |
| 60 | #if !defined(__SROM_H__) |
| 61 | #include "srom.h" |
| 62 | #endif |
| 63 | |
| 64 | /*--------------------- Static Definitions -------------------------*/ |
| 65 | |
| 66 | |
| 67 | |
| 68 | |
| 69 | /*--------------------- Static Classes ----------------------------*/ |
| 70 | |
| 71 | |
| 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}; |
| 78 | |
| 79 | #define AUTORATE_TXOK_CNT 0x0400 |
| 80 | #define AUTORATE_TXFAIL_CNT 0x0064 |
| 81 | #define AUTORATE_TIMEOUT 10 |
| 82 | |
| 83 | /*--------------------- Static Functions --------------------------*/ |
| 84 | |
| 85 | VOID s_vResetCounter ( |
| 86 | IN PKnownNodeDB psNodeDBTable |
| 87 | ); |
| 88 | |
| 89 | |
| 90 | |
| 91 | VOID |
| 92 | s_vResetCounter ( |
| 93 | IN PKnownNodeDB psNodeDBTable |
| 94 | ) |
| 95 | { |
| 96 | BYTE ii; |
| 97 | |
| 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; |
| 102 | } |
| 103 | } |
| 104 | |
| 105 | /*--------------------- Export Variables --------------------------*/ |
| 106 | |
| 107 | |
| 108 | /*--------------------- Export Functions --------------------------*/ |
| 109 | |
| 110 | |
| 111 | /*+ |
| 112 | * |
| 113 | * Description: |
| 114 | * Get RateIdx from the value in SuppRates IE or ExtSuppRates IE |
| 115 | * |
| 116 | * Parameters: |
| 117 | * In: |
| 118 | * BYTE - Rate value in SuppRates IE or ExtSuppRates IE |
| 119 | * Out: |
| 120 | * none |
| 121 | * |
| 122 | * Return Value: RateIdx |
| 123 | * |
| 124 | -*/ |
| 125 | BYTE |
| 126 | DATARATEbyGetRateIdx ( |
| 127 | IN BYTE byRate |
| 128 | ) |
| 129 | { |
| 130 | BYTE ii; |
| 131 | |
| 132 | //Erase basicRate flag. |
| 133 | byRate = byRate & 0x7F;//0111 1111 |
| 134 | |
| 135 | for (ii = 0; ii < MAX_RATE; ii ++) { |
| 136 | if (acbyIERate[ii] == byRate) |
| 137 | return ii; |
| 138 | } |
| 139 | return 0; |
| 140 | } |
| 141 | |
| 142 | |
| 143 | |
| 144 | /*+ |
| 145 | * |
| 146 | * Routine Description: |
| 147 | * Rate fallback Algorithm Implementaion |
| 148 | * |
| 149 | * Parameters: |
| 150 | * In: |
| 151 | * pDevice - Pointer to the adapter |
| 152 | * psNodeDBTable - Pointer to Node Data Base |
| 153 | * Out: |
| 154 | * none |
| 155 | * |
| 156 | * Return Value: none |
| 157 | * |
| 158 | -*/ |
| 159 | #define AUTORATE_TXCNT_THRESHOLD 20 |
| 160 | #define AUTORATE_INC_THRESHOLD 30 |
| 161 | |
| 162 | |
| 163 | |
| 164 | |
| 165 | /*+ |
| 166 | * |
| 167 | * Description: |
| 168 | * Get RateIdx from the value in SuppRates IE or ExtSuppRates IE |
| 169 | * |
| 170 | * Parameters: |
| 171 | * In: |
| 172 | * BYTE - Rate value in SuppRates IE or ExtSuppRates IE |
| 173 | * Out: |
| 174 | * none |
| 175 | * |
| 176 | * Return Value: RateIdx |
| 177 | * |
| 178 | -*/ |
| 179 | WORD |
| 180 | wGetRateIdx( |
| 181 | IN BYTE byRate |
| 182 | ) |
| 183 | { |
| 184 | WORD ii; |
| 185 | |
| 186 | //Erase basicRate flag. |
| 187 | byRate = byRate & 0x7F;//0111 1111 |
| 188 | |
| 189 | for (ii = 0; ii < MAX_RATE; ii ++) { |
| 190 | if (acbyIERate[ii] == byRate) |
| 191 | return ii; |
| 192 | } |
| 193 | return 0; |
| 194 | } |
| 195 | |
| 196 | /*+ |
| 197 | * |
| 198 | * Description: |
| 199 | * Parsing the highest basic & support rate in rate field of frame. |
| 200 | * |
| 201 | * Parameters: |
| 202 | * In: |
| 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. |
| 206 | * Out: |
| 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 |
| 211 | * |
| 212 | * Return Value: none |
| 213 | * |
| 214 | -*/ |
| 215 | VOID |
| 216 | RATEvParseMaxRate ( |
| 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 |
| 226 | ) |
| 227 | { |
| 228 | PSDevice pDevice = (PSDevice) pDeviceHandler; |
| 229 | UINT ii; |
| 230 | BYTE byHighSuppRate = 0; |
| 231 | BYTE byRate = 0; |
| 232 | WORD wOldBasicRate = pDevice->wBasicRate; |
| 233 | UINT uRateLen; |
| 234 | |
| 235 | |
| 236 | if (pItemRates == NULL) |
| 237 | return; |
| 238 | |
| 239 | *pwSuppRate = 0; |
| 240 | uRateLen = pItemRates->len; |
| 241 | |
| 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; |
| 246 | } else { |
| 247 | if (uRateLen > WLAN_RATES_MAXLEN_11B) |
| 248 | uRateLen = WLAN_RATES_MAXLEN_11B; |
| 249 | } |
| 250 | |
| 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)); |
| 258 | } |
| 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)); |
| 265 | } |
| 266 | if ((pItemExtRates != NULL) && (pItemExtRates->byElementID == WLAN_EID_EXTSUPP_RATES) && |
| 267 | (pDevice->eCurrentPHYType != PHY_TYPE_11B)) { |
| 268 | |
| 269 | UINT uExtRateLen = pItemExtRates->len; |
| 270 | |
| 271 | if (uExtRateLen > WLAN_RATES_MAXLEN) |
| 272 | uExtRateLen = WLAN_RATES_MAXLEN; |
| 273 | |
| 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)); |
| 281 | } |
| 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)); |
| 289 | } |
| 290 | } //if(pItemExtRates != NULL) |
| 291 | |
| 292 | if ((pDevice->byPacketType == PK_TYPE_11GB) && CARDbIsOFDMinBasicRate((PVOID)pDevice)) { |
| 293 | pDevice->byPacketType = PK_TYPE_11GA; |
| 294 | } |
| 295 | |
| 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; |
| 301 | else |
| 302 | *pwMaxBasicRate = pDevice->byTopOFDMBasicRate; |
| 303 | if (wOldBasicRate != pDevice->wBasicRate) |
| 304 | CARDvSetRSPINF((PVOID)pDevice, pDevice->eCurrentPHYType); |
| 305 | |
| 306 | DEVICE_PRT(MSG_LEVEL_DEBUG, KERN_INFO"Exit ParseMaxRate\n"); |
| 307 | } |
| 308 | |
| 309 | |
| 310 | /*+ |
| 311 | * |
| 312 | * Routine Description: |
| 313 | * Rate fallback Algorithm Implementaion |
| 314 | * |
| 315 | * Parameters: |
| 316 | * In: |
| 317 | * pDevice - Pointer to the adapter |
| 318 | * psNodeDBTable - Pointer to Node Data Base |
| 319 | * Out: |
| 320 | * none |
| 321 | * |
| 322 | * Return Value: none |
| 323 | * |
| 324 | -*/ |
| 325 | #define AUTORATE_TXCNT_THRESHOLD 20 |
| 326 | #define AUTORATE_INC_THRESHOLD 30 |
| 327 | |
| 328 | VOID |
| 329 | RATEvTxRateFallBack ( |
| 330 | IN PVOID pDeviceHandler, |
| 331 | IN PKnownNodeDB psNodeDBTable |
| 332 | ) |
| 333 | { |
| 334 | PSDevice pDevice = (PSDevice) pDeviceHandler; |
| 335 | WORD wIdxDownRate = 0; |
| 336 | UINT ii; |
| 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; |
| 341 | WORD wIdxUpRate = 0; |
| 342 | DWORD dwTxDiff = 0; |
| 343 | |
| 344 | if (pDevice->pMgmt->eScanState != WMAC_NO_SCANNING) { |
| 345 | // Don't do Fallback when scanning Channel |
| 346 | return; |
| 347 | } |
| 348 | |
| 349 | psNodeDBTable->uTimeCount ++; |
| 350 | |
| 351 | if (psNodeDBTable->uTxFail[MAX_RATE] > psNodeDBTable->uTxOk[MAX_RATE]) |
| 352 | dwTxDiff = psNodeDBTable->uTxFail[MAX_RATE] - psNodeDBTable->uTxOk[MAX_RATE]; |
| 353 | |
| 354 | if ((psNodeDBTable->uTxOk[MAX_RATE] < AUTORATE_TXOK_CNT) && |
| 355 | (dwTxDiff < AUTORATE_TXFAIL_CNT) && |
| 356 | (psNodeDBTable->uTimeCount < AUTORATE_TIMEOUT)) { |
| 357 | return; |
| 358 | } |
| 359 | |
| 360 | if (psNodeDBTable->uTimeCount >= AUTORATE_TIMEOUT) { |
| 361 | psNodeDBTable->uTimeCount = 0; |
| 362 | } |
| 363 | |
| 364 | |
| 365 | for(ii=0;ii<MAX_RATE;ii++) { |
| 366 | if (psNodeDBTable->wSuppRate & (0x0001<<ii)) { |
| 367 | if (bAutoRate[ii] == TRUE) { |
| 368 | wIdxUpRate = (WORD) ii; |
| 369 | } |
| 370 | } else { |
| 371 | bAutoRate[ii] = FALSE; |
| 372 | } |
| 373 | } |
| 374 | |
| 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]; |
| 379 | if (ii < RATE_11M) { |
| 380 | psNodeDBTable->uTxFail[ii] *= 4; |
| 381 | } |
| 382 | dwThroughputTbl[ii] /= (psNodeDBTable->uTxOk[ii] + psNodeDBTable->uTxFail[ii]); |
| 383 | } |
| 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]); |
| 386 | } |
| 387 | dwThroughput = dwThroughputTbl[psNodeDBTable->wTxDataRate]; |
| 388 | |
| 389 | wIdxDownRate = psNodeDBTable->wTxDataRate; |
| 390 | for(ii = psNodeDBTable->wTxDataRate; ii > 0;) { |
| 391 | ii--; |
| 392 | if ( (dwThroughputTbl[ii] > dwThroughput) && |
| 393 | (bAutoRate[ii]==TRUE) ) { |
| 394 | dwThroughput = dwThroughputTbl[ii]; |
| 395 | wIdxDownRate = (WORD) ii; |
| 396 | } |
| 397 | } |
| 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; |
| 403 | } |
| 404 | }else { // adhoc, if uTxOk =0 & uTxFail = 0 |
| 405 | if (psNodeDBTable->uTxFail[MAX_RATE] == 0) |
| 406 | psNodeDBTable->wTxDataRate = wIdxUpRate; |
| 407 | } |
| 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); |
| 412 | |
| 413 | return; |
| 414 | |
| 415 | } |
| 416 | |
| 417 | /*+ |
| 418 | * |
| 419 | * Description: |
| 420 | * This routine is used to assemble available Rate IE. |
| 421 | * |
| 422 | * Parameters: |
| 423 | * In: |
| 424 | * pDevice |
| 425 | * Out: |
| 426 | * |
| 427 | * Return Value: None |
| 428 | * |
| 429 | -*/ |
| 430 | BYTE |
| 431 | RATEuSetIE ( |
| 432 | IN PWLAN_IE_SUPP_RATES pSrcRates, |
| 433 | IN PWLAN_IE_SUPP_RATES pDstRates, |
| 434 | IN UINT uRateLen |
| 435 | ) |
| 436 | { |
| 437 | UINT ii, uu, uRateCnt = 0; |
| 438 | |
| 439 | if ((pSrcRates == NULL) || (pDstRates == NULL)) |
| 440 | return 0; |
| 441 | |
| 442 | if (pSrcRates->len == 0) |
| 443 | return 0; |
| 444 | |
| 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]; |
| 449 | break; |
| 450 | } |
| 451 | } |
| 452 | } |
| 453 | return (BYTE)uRateCnt; |
| 454 | } |
| 455 | |