x86/xen: resume timer irqs early
[linux/fpc-iii.git] / drivers / staging / vt6655 / datarate.c
blobe7b6bc7de4ac20ffa233293e7278c815356c27fc
1 /*
2 * Copyright (c) 1996, 2003 VIA Networking Technologies, Inc.
3 * All rights reserved.
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.
19 * File: datarate.c
21 * Purpose: Handles the auto fallback & data rates functions
23 * Author: Lyndon Chen
25 * Date: July 17, 2002
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.
32 * Revision History:
36 #include "ttype.h"
37 #include "tmacro.h"
38 #include "mac.h"
39 #include "80211mgr.h"
40 #include "bssdb.h"
41 #include "datarate.h"
42 #include "card.h"
43 #include "baseband.h"
44 #include "srom.h"
46 /*--------------------- Static Definitions -------------------------*/
48 /*--------------------- Static Classes ----------------------------*/
50 extern unsigned short TxRate_iwconfig; //2008-5-8 <add> by chester
51 /*--------------------- Static Variables --------------------------*/
52 //static int msglevel =MSG_LEVEL_DEBUG;
53 static int msglevel = MSG_LEVEL_INFO;
54 const unsigned char acbyIERate[MAX_RATE] =
55 {0x02, 0x04, 0x0B, 0x16, 0x0C, 0x12, 0x18, 0x24, 0x30, 0x48, 0x60, 0x6C};
57 #define AUTORATE_TXOK_CNT 0x0400
58 #define AUTORATE_TXFAIL_CNT 0x0064
59 #define AUTORATE_TIMEOUT 10
61 /*--------------------- Static Functions --------------------------*/
63 void s_vResetCounter(
64 PKnownNodeDB psNodeDBTable
67 void
68 s_vResetCounter(
69 PKnownNodeDB psNodeDBTable
72 unsigned char ii;
74 // clear statistic counter for auto_rate
75 for (ii = 0; ii <= MAX_RATE; ii++) {
76 psNodeDBTable->uTxOk[ii] = 0;
77 psNodeDBTable->uTxFail[ii] = 0;
81 /*--------------------- Export Variables --------------------------*/
83 /*--------------------- Export Functions --------------------------*/
85 /*+
87 * Description:
88 * Get RateIdx from the value in SuppRates IE or ExtSuppRates IE
90 * Parameters:
91 * In:
92 * unsigned char - Rate value in SuppRates IE or ExtSuppRates IE
93 * Out:
94 * none
96 * Return Value: RateIdx
98 -*/
99 unsigned char
100 DATARATEbyGetRateIdx(
101 unsigned char byRate
104 unsigned char ii;
106 //Erase basicRate flag.
107 byRate = byRate & 0x7F;//0111 1111
109 for (ii = 0; ii < MAX_RATE; ii++) {
110 if (acbyIERate[ii] == byRate)
111 return ii;
113 return 0;
118 * Routine Description:
119 * Rate fallback Algorithm Implementation
121 * Parameters:
122 * In:
123 * pDevice - Pointer to the adapter
124 * psNodeDBTable - Pointer to Node Data Base
125 * Out:
126 * none
128 * Return Value: none
131 #define AUTORATE_TXCNT_THRESHOLD 20
132 #define AUTORATE_INC_THRESHOLD 30
136 * Description:
137 * Get RateIdx from the value in SuppRates IE or ExtSuppRates IE
139 * Parameters:
140 * In:
141 * unsigned char - Rate value in SuppRates IE or ExtSuppRates IE
142 * Out:
143 * none
145 * Return Value: RateIdx
148 unsigned short
149 wGetRateIdx(
150 unsigned char byRate
153 unsigned short ii;
155 //Erase basicRate flag.
156 byRate = byRate & 0x7F;//0111 1111
158 for (ii = 0; ii < MAX_RATE; ii++) {
159 if (acbyIERate[ii] == byRate)
160 return ii;
162 return 0;
167 * Description:
168 * Parsing the highest basic & support rate in rate field of frame.
170 * Parameters:
171 * In:
172 * pDevice - Pointer to the adapter
173 * pItemRates - Pointer to Rate field defined in 802.11 spec.
174 * pItemExtRates - Pointer to Extended Rate field defined in 802.11 spec.
175 * Out:
176 * pwMaxBasicRate - Maximum Basic Rate
177 * pwMaxSuppRate - Maximum Supported Rate
178 * pbyTopCCKRate - Maximum Basic Rate in CCK mode
179 * pbyTopOFDMRate - Maximum Basic Rate in OFDM mode
181 * Return Value: none
184 void
185 RATEvParseMaxRate(
186 void *pDeviceHandler,
187 PWLAN_IE_SUPP_RATES pItemRates,
188 PWLAN_IE_SUPP_RATES pItemExtRates,
189 bool bUpdateBasicRate,
190 unsigned short *pwMaxBasicRate,
191 unsigned short *pwMaxSuppRate,
192 unsigned short *pwSuppRate,
193 unsigned char *pbyTopCCKRate,
194 unsigned char *pbyTopOFDMRate
197 PSDevice pDevice = (PSDevice) pDeviceHandler;
198 unsigned int ii;
199 unsigned char byHighSuppRate = 0;
200 unsigned char byRate = 0;
201 unsigned short wOldBasicRate = pDevice->wBasicRate;
202 unsigned int uRateLen;
204 if (pItemRates == NULL)
205 return;
207 *pwSuppRate = 0;
208 uRateLen = pItemRates->len;
210 DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO "ParseMaxRate Len: %d\n", uRateLen);
211 if (pDevice->eCurrentPHYType != PHY_TYPE_11B) {
212 if (uRateLen > WLAN_RATES_MAXLEN)
213 uRateLen = WLAN_RATES_MAXLEN;
214 } else {
215 if (uRateLen > WLAN_RATES_MAXLEN_11B)
216 uRateLen = WLAN_RATES_MAXLEN_11B;
219 for (ii = 0; ii < uRateLen; ii++) {
220 byRate = (unsigned char)(pItemRates->abyRates[ii]);
221 if (WLAN_MGMT_IS_BASICRATE(byRate) &&
222 (bUpdateBasicRate == true)) {
223 // Add to basic rate set, update pDevice->byTopCCKBasicRate and pDevice->byTopOFDMBasicRate
224 CARDbAddBasicRate((void *)pDevice, wGetRateIdx(byRate));
225 DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO "ParseMaxRate AddBasicRate: %d\n", wGetRateIdx(byRate));
227 byRate = (unsigned char)(pItemRates->abyRates[ii]&0x7F);
228 if (byHighSuppRate == 0)
229 byHighSuppRate = byRate;
230 if (byRate > byHighSuppRate)
231 byHighSuppRate = byRate;
232 *pwSuppRate |= (1<<wGetRateIdx(byRate));
234 if ((pItemExtRates != NULL) && (pItemExtRates->byElementID == WLAN_EID_EXTSUPP_RATES) &&
235 (pDevice->eCurrentPHYType != PHY_TYPE_11B)) {
236 unsigned int uExtRateLen = pItemExtRates->len;
238 if (uExtRateLen > WLAN_RATES_MAXLEN)
239 uExtRateLen = WLAN_RATES_MAXLEN;
241 for (ii = 0; ii < uExtRateLen; ii++) {
242 byRate = (unsigned char)(pItemExtRates->abyRates[ii]);
243 // select highest basic rate
244 if (WLAN_MGMT_IS_BASICRATE(pItemExtRates->abyRates[ii])) {
245 // Add to basic rate set, update pDevice->byTopCCKBasicRate and pDevice->byTopOFDMBasicRate
246 CARDbAddBasicRate((void *)pDevice, wGetRateIdx(byRate));
247 DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO "ParseMaxRate AddBasicRate: %d\n", wGetRateIdx(byRate));
249 byRate = (unsigned char)(pItemExtRates->abyRates[ii]&0x7F);
250 if (byHighSuppRate == 0)
251 byHighSuppRate = byRate;
252 if (byRate > byHighSuppRate)
253 byHighSuppRate = byRate;
254 *pwSuppRate |= (1<<wGetRateIdx(byRate));
255 //DBG_PRN_GRP09(("ParseMaxRate : HighSuppRate: %d, %X\n", wGetRateIdx(byRate), byRate));
257 } //if (pItemExtRates != NULL)
259 if ((pDevice->byPacketType == PK_TYPE_11GB) && CARDbIsOFDMinBasicRate((void *)pDevice)) {
260 pDevice->byPacketType = PK_TYPE_11GA;
263 *pbyTopCCKRate = pDevice->byTopCCKBasicRate;
264 *pbyTopOFDMRate = pDevice->byTopOFDMBasicRate;
265 *pwMaxSuppRate = wGetRateIdx(byHighSuppRate);
266 if ((pDevice->byPacketType == PK_TYPE_11B) || (pDevice->byPacketType == PK_TYPE_11GB))
267 *pwMaxBasicRate = pDevice->byTopCCKBasicRate;
268 else
269 *pwMaxBasicRate = pDevice->byTopOFDMBasicRate;
270 if (wOldBasicRate != pDevice->wBasicRate)
271 CARDvSetRSPINF((void *)pDevice, pDevice->eCurrentPHYType);
273 DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO "Exit ParseMaxRate\n");
278 * Routine Description:
279 * Rate fallback Algorithm Implementaion
281 * Parameters:
282 * In:
283 * pDevice - Pointer to the adapter
284 * psNodeDBTable - Pointer to Node Data Base
285 * Out:
286 * none
288 * Return Value: none
291 #define AUTORATE_TXCNT_THRESHOLD 20
292 #define AUTORATE_INC_THRESHOLD 30
294 void
295 RATEvTxRateFallBack(
296 void *pDeviceHandler,
297 PKnownNodeDB psNodeDBTable
300 PSDevice pDevice = (PSDevice) pDeviceHandler;
301 unsigned short wIdxDownRate = 0;
302 unsigned int ii;
303 //unsigned long dwRateTable[MAX_RATE] = {1, 2, 5, 11, 6, 9, 12, 18, 24, 36, 48, 54};
304 bool bAutoRate[MAX_RATE] = {true, true, true, true, false, false, true, true, true, true, true, true};
305 unsigned long dwThroughputTbl[MAX_RATE] = {10, 20, 55, 110, 60, 90, 120, 180, 240, 360, 480, 540};
306 unsigned long dwThroughput = 0;
307 unsigned short wIdxUpRate = 0;
308 unsigned long dwTxDiff = 0;
310 if (pDevice->pMgmt->eScanState != WMAC_NO_SCANNING) {
311 // Don't do Fallback when scanning Channel
312 return;
315 psNodeDBTable->uTimeCount++;
317 if (psNodeDBTable->uTxFail[MAX_RATE] > psNodeDBTable->uTxOk[MAX_RATE])
318 dwTxDiff = psNodeDBTable->uTxFail[MAX_RATE] - psNodeDBTable->uTxOk[MAX_RATE];
320 if ((psNodeDBTable->uTxOk[MAX_RATE] < AUTORATE_TXOK_CNT) &&
321 (dwTxDiff < AUTORATE_TXFAIL_CNT) &&
322 (psNodeDBTable->uTimeCount < AUTORATE_TIMEOUT)) {
323 return;
326 if (psNodeDBTable->uTimeCount >= AUTORATE_TIMEOUT) {
327 psNodeDBTable->uTimeCount = 0;
330 for (ii = 0; ii < MAX_RATE; ii++) {
331 if (psNodeDBTable->wSuppRate & (0x0001<<ii)) {
332 if (bAutoRate[ii] == true) {
333 wIdxUpRate = (unsigned short) ii;
335 } else {
336 bAutoRate[ii] = false;
340 for (ii = 0; ii <= psNodeDBTable->wTxDataRate; ii++) {
341 if ((psNodeDBTable->uTxOk[ii] != 0) ||
342 (psNodeDBTable->uTxFail[ii] != 0)) {
343 dwThroughputTbl[ii] *= psNodeDBTable->uTxOk[ii];
344 if (ii < RATE_11M) {
345 psNodeDBTable->uTxFail[ii] *= 4;
347 dwThroughputTbl[ii] /= (psNodeDBTable->uTxOk[ii] + psNodeDBTable->uTxFail[ii]);
349 // DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO "Rate %d,Ok: %d, Fail:%d, Throughput:%d\n",
350 // ii, psNodeDBTable->uTxOk[ii], psNodeDBTable->uTxFail[ii], dwThroughputTbl[ii]);
352 dwThroughput = dwThroughputTbl[psNodeDBTable->wTxDataRate];
354 wIdxDownRate = psNodeDBTable->wTxDataRate;
355 for (ii = psNodeDBTable->wTxDataRate; ii > 0;) {
356 ii--;
357 if ((dwThroughputTbl[ii] > dwThroughput) &&
358 (bAutoRate[ii] == true)) {
359 dwThroughput = dwThroughputTbl[ii];
360 wIdxDownRate = (unsigned short) ii;
363 psNodeDBTable->wTxDataRate = wIdxDownRate;
364 if (psNodeDBTable->uTxOk[MAX_RATE]) {
365 if (psNodeDBTable->uTxOk[MAX_RATE] >
366 (psNodeDBTable->uTxFail[MAX_RATE] * 4)) {
367 psNodeDBTable->wTxDataRate = wIdxUpRate;
369 } else { // adhoc, if uTxOk =0 & uTxFail = 0
370 if (psNodeDBTable->uTxFail[MAX_RATE] == 0)
371 psNodeDBTable->wTxDataRate = wIdxUpRate;
373 //2008-5-8 <add> by chester
374 TxRate_iwconfig = psNodeDBTable->wTxDataRate;
375 s_vResetCounter(psNodeDBTable);
376 // DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO "Rate: %d, U:%d, D:%d\n", psNodeDBTable->wTxDataRate, wIdxUpRate, wIdxDownRate);
378 return;
383 * Description:
384 * This routine is used to assemble available Rate IE.
386 * Parameters:
387 * In:
388 * pDevice
389 * Out:
391 * Return Value: None
394 unsigned char
395 RATEuSetIE(
396 PWLAN_IE_SUPP_RATES pSrcRates,
397 PWLAN_IE_SUPP_RATES pDstRates,
398 unsigned int uRateLen
401 unsigned int ii, uu, uRateCnt = 0;
403 if ((pSrcRates == NULL) || (pDstRates == NULL))
404 return 0;
406 if (pSrcRates->len == 0)
407 return 0;
409 for (ii = 0; ii < uRateLen; ii++) {
410 for (uu = 0; uu < pSrcRates->len; uu++) {
411 if ((pSrcRates->abyRates[uu] & 0x7F) == acbyIERate[ii]) {
412 pDstRates->abyRates[uRateCnt++] = pSrcRates->abyRates[uu];
413 break;
417 return (unsigned char)uRateCnt;