![Charles Clément](/assets/img/avatar_default.png)
Signed-off-by: Charles Clément <caratorn@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
438 lines
12 KiB
C
438 lines
12 KiB
C
/*
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* Copyright (c) 1996, 2003 VIA Networking Technologies, Inc.
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* All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* File: datarate.c
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*
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* Purpose: Handles the auto fallback & data rates functions
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*
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* Author: Lyndon Chen
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*
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* Date: July 17, 2002
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*
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* Functions:
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* RATEvParseMaxRate - Parsing the highest basic & support rate in rate field of frame
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* RATEvTxRateFallBack - Rate fallback Algorithm Implementaion
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* RATEuSetIE- Set rate IE field.
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*
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* Revision History:
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*
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*/
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#include "ttype.h"
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#include "tmacro.h"
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#include "mac.h"
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#include "80211mgr.h"
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#include "bssdb.h"
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#include "datarate.h"
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#include "card.h"
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#include "baseband.h"
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#include "srom.h"
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/*--------------------- Static Definitions -------------------------*/
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/*--------------------- Static Classes ----------------------------*/
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extern unsigned short TxRate_iwconfig; //2008-5-8 <add> by chester
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/*--------------------- Static Variables --------------------------*/
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//static int msglevel =MSG_LEVEL_DEBUG;
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static int msglevel =MSG_LEVEL_INFO;
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const unsigned char acbyIERate[MAX_RATE] =
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{0x02, 0x04, 0x0B, 0x16, 0x0C, 0x12, 0x18, 0x24, 0x30, 0x48, 0x60, 0x6C};
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#define AUTORATE_TXOK_CNT 0x0400
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#define AUTORATE_TXFAIL_CNT 0x0064
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#define AUTORATE_TIMEOUT 10
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/*--------------------- Static Functions --------------------------*/
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void s_vResetCounter (
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PKnownNodeDB psNodeDBTable
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);
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void
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s_vResetCounter (
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PKnownNodeDB psNodeDBTable
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)
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{
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unsigned char ii;
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// clear statistic counter for auto_rate
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for(ii=0;ii<=MAX_RATE;ii++) {
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psNodeDBTable->uTxOk[ii] = 0;
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psNodeDBTable->uTxFail[ii] = 0;
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}
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}
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/*--------------------- Export Variables --------------------------*/
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/*--------------------- Export Functions --------------------------*/
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/*+
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*
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* Description:
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* Get RateIdx from the value in SuppRates IE or ExtSuppRates IE
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*
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* Parameters:
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* In:
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* unsigned char - Rate value in SuppRates IE or ExtSuppRates IE
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* Out:
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* none
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*
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* Return Value: RateIdx
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*
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-*/
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unsigned char
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DATARATEbyGetRateIdx (
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unsigned char byRate
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)
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{
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unsigned char ii;
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//Erase basicRate flag.
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byRate = byRate & 0x7F;//0111 1111
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for (ii = 0; ii < MAX_RATE; ii ++) {
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if (acbyIERate[ii] == byRate)
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return ii;
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}
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return 0;
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}
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/*+
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*
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* Routine Description:
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* Rate fallback Algorithm Implementaion
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*
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* Parameters:
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* In:
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* pDevice - Pointer to the adapter
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* psNodeDBTable - Pointer to Node Data Base
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* Out:
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* none
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*
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* Return Value: none
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*
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-*/
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#define AUTORATE_TXCNT_THRESHOLD 20
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#define AUTORATE_INC_THRESHOLD 30
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/*+
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*
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* Description:
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* Get RateIdx from the value in SuppRates IE or ExtSuppRates IE
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*
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* Parameters:
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* In:
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* unsigned char - Rate value in SuppRates IE or ExtSuppRates IE
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* Out:
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* none
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*
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* Return Value: RateIdx
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*
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-*/
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unsigned short
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wGetRateIdx(
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unsigned char byRate
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)
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{
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unsigned short ii;
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//Erase basicRate flag.
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byRate = byRate & 0x7F;//0111 1111
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for (ii = 0; ii < MAX_RATE; ii ++) {
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if (acbyIERate[ii] == byRate)
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return ii;
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}
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return 0;
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}
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/*+
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*
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* Description:
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* Parsing the highest basic & support rate in rate field of frame.
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*
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* Parameters:
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* In:
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* pDevice - Pointer to the adapter
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* pItemRates - Pointer to Rate field defined in 802.11 spec.
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* pItemExtRates - Pointer to Extended Rate field defined in 802.11 spec.
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* Out:
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* pwMaxBasicRate - Maximum Basic Rate
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* pwMaxSuppRate - Maximum Supported Rate
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* pbyTopCCKRate - Maximum Basic Rate in CCK mode
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* pbyTopOFDMRate - Maximum Basic Rate in OFDM mode
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*
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* Return Value: none
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*
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-*/
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void
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RATEvParseMaxRate (
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void *pDeviceHandler,
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PWLAN_IE_SUPP_RATES pItemRates,
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PWLAN_IE_SUPP_RATES pItemExtRates,
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bool bUpdateBasicRate,
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unsigned short *pwMaxBasicRate,
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unsigned short *pwMaxSuppRate,
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unsigned short *pwSuppRate,
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unsigned char *pbyTopCCKRate,
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unsigned char *pbyTopOFDMRate
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)
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{
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PSDevice pDevice = (PSDevice) pDeviceHandler;
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unsigned int ii;
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unsigned char byHighSuppRate = 0;
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unsigned char byRate = 0;
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unsigned short wOldBasicRate = pDevice->wBasicRate;
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unsigned int uRateLen;
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if (pItemRates == NULL)
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return;
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*pwSuppRate = 0;
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uRateLen = pItemRates->len;
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DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"ParseMaxRate Len: %d\n", uRateLen);
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if (pDevice->eCurrentPHYType != PHY_TYPE_11B) {
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if (uRateLen > WLAN_RATES_MAXLEN)
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uRateLen = WLAN_RATES_MAXLEN;
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} else {
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if (uRateLen > WLAN_RATES_MAXLEN_11B)
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uRateLen = WLAN_RATES_MAXLEN_11B;
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}
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for (ii = 0; ii < uRateLen; ii++) {
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byRate = (unsigned char)(pItemRates->abyRates[ii]);
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if (WLAN_MGMT_IS_BASICRATE(byRate) &&
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(bUpdateBasicRate == true)) {
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// Add to basic rate set, update pDevice->byTopCCKBasicRate and pDevice->byTopOFDMBasicRate
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CARDbAddBasicRate((void *)pDevice, wGetRateIdx(byRate));
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DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"ParseMaxRate AddBasicRate: %d\n", wGetRateIdx(byRate));
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}
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byRate = (unsigned char)(pItemRates->abyRates[ii]&0x7F);
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if (byHighSuppRate == 0)
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byHighSuppRate = byRate;
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if (byRate > byHighSuppRate)
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byHighSuppRate = byRate;
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*pwSuppRate |= (1<<wGetRateIdx(byRate));
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}
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if ((pItemExtRates != NULL) && (pItemExtRates->byElementID == WLAN_EID_EXTSUPP_RATES) &&
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(pDevice->eCurrentPHYType != PHY_TYPE_11B)) {
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unsigned int uExtRateLen = pItemExtRates->len;
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if (uExtRateLen > WLAN_RATES_MAXLEN)
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uExtRateLen = WLAN_RATES_MAXLEN;
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for (ii = 0; ii < uExtRateLen ; ii++) {
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byRate = (unsigned char)(pItemExtRates->abyRates[ii]);
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// select highest basic rate
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if (WLAN_MGMT_IS_BASICRATE(pItemExtRates->abyRates[ii])) {
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// Add to basic rate set, update pDevice->byTopCCKBasicRate and pDevice->byTopOFDMBasicRate
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CARDbAddBasicRate((void *)pDevice, wGetRateIdx(byRate));
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DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"ParseMaxRate AddBasicRate: %d\n", wGetRateIdx(byRate));
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}
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byRate = (unsigned char)(pItemExtRates->abyRates[ii]&0x7F);
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if (byHighSuppRate == 0)
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byHighSuppRate = byRate;
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if (byRate > byHighSuppRate)
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byHighSuppRate = byRate;
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*pwSuppRate |= (1<<wGetRateIdx(byRate));
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//DBG_PRN_GRP09(("ParseMaxRate : HighSuppRate: %d, %X\n", wGetRateIdx(byRate), byRate));
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}
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} //if(pItemExtRates != NULL)
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if ((pDevice->byPacketType == PK_TYPE_11GB) && CARDbIsOFDMinBasicRate((void *)pDevice)) {
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pDevice->byPacketType = PK_TYPE_11GA;
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}
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*pbyTopCCKRate = pDevice->byTopCCKBasicRate;
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*pbyTopOFDMRate = pDevice->byTopOFDMBasicRate;
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*pwMaxSuppRate = wGetRateIdx(byHighSuppRate);
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if ((pDevice->byPacketType==PK_TYPE_11B) || (pDevice->byPacketType==PK_TYPE_11GB))
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*pwMaxBasicRate = pDevice->byTopCCKBasicRate;
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else
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*pwMaxBasicRate = pDevice->byTopOFDMBasicRate;
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if (wOldBasicRate != pDevice->wBasicRate)
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CARDvSetRSPINF((void *)pDevice, pDevice->eCurrentPHYType);
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DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"Exit ParseMaxRate\n");
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}
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/*+
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*
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* Routine Description:
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* Rate fallback Algorithm Implementaion
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*
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* Parameters:
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* In:
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* pDevice - Pointer to the adapter
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* psNodeDBTable - Pointer to Node Data Base
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* Out:
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* none
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*
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* Return Value: none
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*
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-*/
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#define AUTORATE_TXCNT_THRESHOLD 20
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#define AUTORATE_INC_THRESHOLD 30
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void
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RATEvTxRateFallBack (
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void *pDeviceHandler,
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PKnownNodeDB psNodeDBTable
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)
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{
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PSDevice pDevice = (PSDevice) pDeviceHandler;
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unsigned short wIdxDownRate = 0;
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unsigned int ii;
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//unsigned long dwRateTable[MAX_RATE] = {1, 2, 5, 11, 6, 9, 12, 18, 24, 36, 48, 54};
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bool bAutoRate[MAX_RATE] = {true,true,true,true,false,false,true,true,true,true,true,true};
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unsigned long dwThroughputTbl[MAX_RATE] = {10, 20, 55, 110, 60, 90, 120, 180, 240, 360, 480, 540};
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unsigned long dwThroughput = 0;
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unsigned short wIdxUpRate = 0;
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unsigned long dwTxDiff = 0;
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if (pDevice->pMgmt->eScanState != WMAC_NO_SCANNING) {
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// Don't do Fallback when scanning Channel
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return;
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}
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psNodeDBTable->uTimeCount ++;
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if (psNodeDBTable->uTxFail[MAX_RATE] > psNodeDBTable->uTxOk[MAX_RATE])
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dwTxDiff = psNodeDBTable->uTxFail[MAX_RATE] - psNodeDBTable->uTxOk[MAX_RATE];
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if ((psNodeDBTable->uTxOk[MAX_RATE] < AUTORATE_TXOK_CNT) &&
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(dwTxDiff < AUTORATE_TXFAIL_CNT) &&
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(psNodeDBTable->uTimeCount < AUTORATE_TIMEOUT)) {
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return;
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}
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if (psNodeDBTable->uTimeCount >= AUTORATE_TIMEOUT) {
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psNodeDBTable->uTimeCount = 0;
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}
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for(ii=0;ii<MAX_RATE;ii++) {
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if (psNodeDBTable->wSuppRate & (0x0001<<ii)) {
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if (bAutoRate[ii] == true) {
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wIdxUpRate = (unsigned short) ii;
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}
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} else {
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bAutoRate[ii] = false;
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}
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}
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for(ii=0;ii<=psNodeDBTable->wTxDataRate;ii++) {
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if ( (psNodeDBTable->uTxOk[ii] != 0) ||
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(psNodeDBTable->uTxFail[ii] != 0) ) {
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dwThroughputTbl[ii] *= psNodeDBTable->uTxOk[ii];
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if (ii < RATE_11M) {
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psNodeDBTable->uTxFail[ii] *= 4;
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}
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dwThroughputTbl[ii] /= (psNodeDBTable->uTxOk[ii] + psNodeDBTable->uTxFail[ii]);
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}
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// DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"Rate %d,Ok: %d, Fail:%d, Throughput:%d\n",
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// ii, psNodeDBTable->uTxOk[ii], psNodeDBTable->uTxFail[ii], dwThroughputTbl[ii]);
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}
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dwThroughput = dwThroughputTbl[psNodeDBTable->wTxDataRate];
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wIdxDownRate = psNodeDBTable->wTxDataRate;
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for(ii = psNodeDBTable->wTxDataRate; ii > 0;) {
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ii--;
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if ( (dwThroughputTbl[ii] > dwThroughput) &&
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(bAutoRate[ii]==true) ) {
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dwThroughput = dwThroughputTbl[ii];
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wIdxDownRate = (unsigned short) ii;
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}
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}
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psNodeDBTable->wTxDataRate = wIdxDownRate;
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if (psNodeDBTable->uTxOk[MAX_RATE]) {
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if (psNodeDBTable->uTxOk[MAX_RATE] >
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(psNodeDBTable->uTxFail[MAX_RATE] * 4) ) {
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psNodeDBTable->wTxDataRate = wIdxUpRate;
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}
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}else { // adhoc, if uTxOk =0 & uTxFail = 0
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if (psNodeDBTable->uTxFail[MAX_RATE] == 0)
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psNodeDBTable->wTxDataRate = wIdxUpRate;
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}
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//2008-5-8 <add> by chester
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TxRate_iwconfig=psNodeDBTable->wTxDataRate;
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s_vResetCounter(psNodeDBTable);
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// DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"Rate: %d, U:%d, D:%d\n", psNodeDBTable->wTxDataRate, wIdxUpRate, wIdxDownRate);
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return;
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}
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/*+
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*
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* Description:
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* This routine is used to assemble available Rate IE.
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*
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* Parameters:
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* In:
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* pDevice
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* Out:
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*
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* Return Value: None
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*
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-*/
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unsigned char
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RATEuSetIE (
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PWLAN_IE_SUPP_RATES pSrcRates,
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PWLAN_IE_SUPP_RATES pDstRates,
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unsigned int uRateLen
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)
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{
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unsigned int ii, uu, uRateCnt = 0;
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if ((pSrcRates == NULL) || (pDstRates == NULL))
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return 0;
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if (pSrcRates->len == 0)
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return 0;
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for (ii = 0; ii < uRateLen; ii++) {
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for (uu = 0; uu < pSrcRates->len; uu++) {
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if ((pSrcRates->abyRates[uu] & 0x7F) == acbyIERate[ii]) {
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pDstRates->abyRates[uRateCnt ++] = pSrcRates->abyRates[uu];
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break;
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}
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}
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}
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return (unsigned char)uRateCnt;
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}
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