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@@ -1,364 +0,0 @@
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-/*
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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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-
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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 "rf.h"
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-
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-/* static int msglevel = MSG_LEVEL_DEBUG; */
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-static int msglevel = MSG_LEVEL_INFO;
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-static const u8 acbyIERate[MAX_RATE] = {0x02, 0x04, 0x0B, 0x16, 0x0C, 0x12, 0x18,
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- 0x24, 0x30, 0x48, 0x60, 0x6C};
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-
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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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-
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-void s_vResetCounter(PKnownNodeDB psNodeDBTable);
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-
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-void s_vResetCounter(PKnownNodeDB psNodeDBTable)
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-{
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- u8 ii;
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-
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- /* clear statistics 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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-
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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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- *
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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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- * u8 - 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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-u16 RATEwGetRateIdx(u8 byRate)
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-{
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- u16 ii;
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-
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- /* erase BasicRate flag */
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- byRate = byRate & 0x7F;
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-
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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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- *
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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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-
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-void RATEvParseMaxRate(struct vnt_private *pDevice,
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- PWLAN_IE_SUPP_RATES pItemRates, PWLAN_IE_SUPP_RATES pItemExtRates,
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- int bUpdateBasicRate, u16 *pwMaxBasicRate, u16 *pwMaxSuppRate,
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- u16 *pwSuppRate, u8 *pbyTopCCKRate, u8 *pbyTopOFDMRate)
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-{
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- int ii;
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- u8 byHighSuppRate = 0, byRate = 0;
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- u16 wOldBasicRate = pDevice->wBasicRate;
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- u32 uRateLen;
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-
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- if (pItemRates == NULL)
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- return;
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-
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- *pwSuppRate = 0;
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- uRateLen = pItemRates->len;
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-
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- DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"ParseMaxRate Len: %d\n", uRateLen);
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- if (pDevice->byBBType != BB_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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-
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- for (ii = 0; ii < uRateLen; ii++) {
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- byRate = (u8)(pItemRates->abyRates[ii]);
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- if (WLAN_MGMT_IS_BASICRATE(byRate) &&
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- (bUpdateBasicRate == true)) {
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- /*
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- * add to basic rate set, update pDevice->byTopCCKBasicRate and
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- * pDevice->byTopOFDMBasicRate
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- */
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- vnt_add_basic_rate(pDevice, RATEwGetRateIdx(byRate));
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- DBG_PRT(MSG_LEVEL_DEBUG,
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- KERN_INFO"ParseMaxRate AddBasicRate: %d\n",
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- RATEwGetRateIdx(byRate));
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- }
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- byRate = (u8)(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<<RATEwGetRateIdx(byRate));
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- }
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- if ((pItemExtRates != NULL) && (pItemExtRates->byElementID == WLAN_EID_EXTSUPP_RATES) &&
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- (pDevice->byBBType != BB_TYPE_11B)) {
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-
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- unsigned int uExtRateLen = pItemExtRates->len;
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-
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- if (uExtRateLen > WLAN_RATES_MAXLEN)
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- uExtRateLen = WLAN_RATES_MAXLEN;
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-
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- for (ii = 0; ii < uExtRateLen; ii++) {
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- byRate = (u8)(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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- /*
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- * add to basic rate set, update pDevice->byTopCCKBasicRate and
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- * pDevice->byTopOFDMBasicRate
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- */
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- vnt_add_basic_rate(pDevice, RATEwGetRateIdx(byRate));
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- DBG_PRT(MSG_LEVEL_DEBUG,
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- KERN_INFO"ParseMaxRate AddBasicRate: %d\n",
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- RATEwGetRateIdx(byRate));
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- }
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- byRate = (u8)(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<<RATEwGetRateIdx(byRate));
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-
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- /* DBG_PRN_GRP09(("ParseMaxRate : HighSuppRate: %d, %X\n",
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- * RATEwGetRateIdx(byRate), byRate));
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- */
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- }
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- }
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-
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- if ((pDevice->byPacketType == PK_TYPE_11GB)
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- && vnt_ofdm_min_rate(pDevice)) {
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- pDevice->byPacketType = PK_TYPE_11GA;
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- }
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-
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- *pbyTopCCKRate = pDevice->byTopCCKBasicRate;
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- *pbyTopOFDMRate = pDevice->byTopOFDMBasicRate;
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- *pwMaxSuppRate = RATEwGetRateIdx(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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- vnt_set_rspinf(pDevice, pDevice->byBBType);
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-
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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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- *
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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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-void RATEvTxRateFallBack(struct vnt_private *pDevice,
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- PKnownNodeDB psNodeDBTable)
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-{
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- struct vnt_manager *pMgmt = &pDevice->vnt_mgmt;
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- u16 wIdxDownRate = 0;
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- int ii;
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- int bAutoRate[MAX_RATE] = {true, true, true, true, false, false, true,
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- true, true, true, true, true};
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- u32 dwThroughputTbl[MAX_RATE] = {10, 20, 55, 110, 60, 90, 120, 180,
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- 240, 360, 480, 540};
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- u32 dwThroughput = 0;
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- u16 wIdxUpRate = 0;
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- u32 dwTxDiff = 0;
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-
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- if (pMgmt->eScanState != WMAC_NO_SCANNING)
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- return; /* Don't do Fallback when scanning Channel */
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-
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- psNodeDBTable->uTimeCount++;
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-
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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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-
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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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-
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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 = (u16) ii;
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- } else {
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- bAutoRate[ii] = false;
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- }
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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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- 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, (int)psNodeDBTable->uTxOk[ii], (int)psNodeDBTable->uTxFail[ii], (int)dwThroughputTbl[ii]);
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- }
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- dwThroughput = dwThroughputTbl[psNodeDBTable->wTxDataRate];
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-
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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 = (u16) 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(total) == 0 & uTxFail(total) == 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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-
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- if (pDevice->byBBType == BB_TYPE_11A) {
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- if (psNodeDBTable->wTxDataRate <= RATE_11M)
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- psNodeDBTable->wTxDataRate = RATE_6M;
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- }
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- DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"uTxOk[MAX_RATE] %d, uTxFail[MAX_RATE]:%d\n", (int)psNodeDBTable->uTxOk[MAX_RATE], (int)psNodeDBTable->uTxFail[MAX_RATE]);
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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", (int)psNodeDBTable->wTxDataRate, (int)wIdxUpRate, (int)wIdxDownRate);
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- return;
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-}
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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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-u8 RATEuSetIE(PWLAN_IE_SUPP_RATES pSrcRates, PWLAN_IE_SUPP_RATES pDstRates,
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- unsigned int uRateLen)
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-{
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- unsigned int ii, uu, uRateCnt = 0;
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-
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- if ((pSrcRates == NULL) || (pDstRates == NULL))
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- return 0;
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-
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- if (pSrcRates->len == 0)
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- return 0;
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-
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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 (u8)uRateCnt;
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-}
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Malcolm Priestley