/*
* Update the SIB's rate control information
*
* This should be called when the supported rates change
* (e.g. SME operation, wireless mode change)
*
* It will determine which rates are valid for use.
*/
void
rcSibUpdate(struct atheros_softc *asc, struct atheros_node *pSib,
int keepState, struct ieee80211_rateset *pRateSet,
enum ieee80211_phymode curmode)
{
#define N(a) (sizeof(a)/sizeof(a[0]))
const RATE_TABLE *pRateTable;
struct TxRateCtrl_s *pRc = &pSib->txRateCtrl;
A_UINT8 i, j, hi = 0, count;
A_INT8 k;
int rateCount, numInfo;
HAL_BOOL bFoundDot11Rate_11, bFoundDot11Rate_22;
pRateTable = asc->hwRateTable[curmode];
/* Initial rate table size. Will change depending on the working rate set */
pRc->rateTableSize = MAX_TX_RATE_TBL;
numInfo = N(pRateTable->info);
/* Initialize thresholds according to the global rate table */
for (i = 0 ; (i < pRc->rateTableSize) && (!keepState) && (i < pRateTable->rateCount); i++) {
if (i < numInfo) {
pRc->state[i].rssiThres = pRateTable->info[i].rssiAckValidMin;
}
pRc->state[i].per = 0;
#if ATH_SUPPORT_VOWEXT /* for RCA */
pRc->state[i].maxAggrSize = MAX_AGGR_LIMIT;
#endif
}
/* Determine the valid rates */
rcInitValidTxMask(pRc);
rateCount = pRateTable->rateCount;
#ifdef notyet
if (wlanIs5211Channel14(pSib)) {
rateCount = 2;
}
#endif
count = 0;
if (!pRateSet->rs_nrates) {
/* No working rate, use valid rates */
for (i = 0; i < rateCount; i++) {
/*
* If the rate is:
* 1. not valid, or
* 2. this is an uapsd node but the rate is not an uapsd rate
* skip it.
*/
if (pRateTable->info[i].valid != TRUE) {
continue;
}
#ifdef ATH_SUPPORT_UAPSD_RATE_CONTROL
if ((pSib->uapsd) && (pRateTable->info[i].validUAPSD != TRUE)) {
continue;
}
#endif /* ATH_SUPPORT_UAPSD_RATE_CONTROL */
pRc->validRateIndex[count] = i;
/*
* Copy the static rate series for the correspondig rate
* from static rate table to TxRateCtrl_s.
*/
OS_MEMCPY(pRc->validRateSeries[count],
&(pRateTable->info[i].normalSched), MAX_SCHED_TBL);
count ++;
rcSetValidTxMask(pRc, i, TRUE);
hi = A_MAX(hi, i);
pSib->rixMap[i] = 0;
}
pRc->maxValidRate = count;
pRc->maxValidTurboRate = pRateTable->numTurboRates;
} else {
A_UINT8 turboCount;
A_UINT64 mask;
bFoundDot11Rate_11 = FALSE;
bFoundDot11Rate_22 = FALSE;
for(k = 0; k < pRateSet->rs_nrates; k++) {
// Look for 5.5 mbps
if((pRateSet->rs_rates[k] & 0x7F) == 11) {
bFoundDot11Rate_11 = TRUE;
}
// Look for 11 mbps
if((pRateSet->rs_rates[k] & 0x7F) == 22) {
bFoundDot11Rate_22 = TRUE;
}
}
/*
* Use intersection of working rates and valid rates.
* if working rates has 6 OFDM and does not have 5.5 and 11 CCKM, use 6.
* if working rates has 9 OFDM and does not has 11 CCKM, use 9.
*/
turboCount = 0;
for (i = 0; i < pRateSet->rs_nrates; i++) {
for (j = 0; j < rateCount; j++) {
if ((pRateSet->rs_rates[i] & 0x7F) ==
(pRateTable->info[j].dot11Rate & 0x7F)) {
#ifdef ATH_SUPPORT_UAPSD_RATE_CONTROL
/*
* If this is an uapsd node but the rate is not an uapsd rate
* skip it.
*/
if ((pSib->uapsd) && (pRateTable->info[j].validUAPSD != TRUE)) {
continue;
}
#endif /* ATH_SUPPORT_UAPSD_RATE_CONTROL */
if(pRateTable->info[j].valid == TRUE) {
rcSetValidTxMask(pRc, j, TRUE);
hi = A_MAX(hi, j);
pSib->rixMap[j] = i;
} else {
//To keep rate monotonicity
if(pRateTable->info[j].phy == WLAN_PHY_OFDM &&
((((pRateSet->rs_rates[i] & 0x7F) == 12) &&
(!bFoundDot11Rate_11) && (!bFoundDot11Rate_22)) ||
(((pRateSet->rs_rates[i] & 0x7F) == 18) && !bFoundDot11Rate_22)))
{
rcSetValidTxMask(pRc, j, TRUE);
hi = A_MAX(hi, j);
pSib->rixMap[j] = i;
}
}
}
}
}
/* Get actually valid rate index, previous we get it from rate table,
* now get rate table which include all working rate, so we need make
* sure our valid rate table align with working rate */
mask = pRc->validTxRateMask;
for (i = 0; i < pRc->rateTableSize; i ++) {
if (mask & ((A_UINT64)1 << i)) {
pRc->validRateIndex[count] = i;
/*
* Copy the static rate series for the correspondig rate
* from static rate table to TxRateCtrl_s.
*/
OS_MEMCPY(pRc->validRateSeries[count],
&(pRateTable->info[i].normalSched), MAX_SCHED_TBL);
count ++;
if (pRateTable->info[i].phy == WLAN_PHY_TURBO) {
turboCount ++;
}
}
}
pRc->maxValidRate = count;
pRc->maxValidTurboRate = turboCount;
}
/*
* Modify the static rate series in TxRateCtrl_s with respect to intersection
* rate table.
*/
for(i = 0 ; i < pRc->maxValidRate; i ++) {
k = i;
for (j = 5; j < MAX_SCHED_TBL; j ++) {
if(j % 8 == 0) {
k = i;
j = j + 4;
continue;
}
for (; k >= 0; k --) {
if(pRc->validRateSeries[i][j] == pRateTable->info[k].rateCode) {
break;
}
}
if (k == -1) {
pRc->validRateSeries[i][j] = pRc->validRateSeries[i][j-1];
}
}
}
pRc->rateTableSize = hi + 1;
pRc->rateMax = A_MIN(hi, pRateTable->initialRateMax);
ASSERT(pRc->rateTableSize <= MAX_TX_RATE_TBL);
#undef N
}
/*
* Update the SIB's rate control information
*
* This should be called when the supported rates change
* (e.g. SME operation, wireless mode change)
*
* It will determine which rates are valid for use.
*/
void
rcSibUpdate(struct ath_softc *sc, struct ath_node *an, A_BOOL keepState)
{
struct atheros_node *pSib = ATH_NODE_ATHEROS(an);
struct atheros_softc *asc = (struct atheros_softc *) sc->sc_rc;
const RATE_TABLE *pRateTable = asc->hwRateTable[sc->sc_curmode];
struct ieee80211_rateset *pRateSet = &an->an_node.ni_rates;
struct TxRateCtrl_s *pRc = &pSib->txRateCtrl;
A_UINT8 i, j, hi = 0,count;
int rateCount;
/* Initial rate table size. Will change depending on the working rate set */
pRc->rateTableSize = MAX_TX_RATE_TBL;
/* Initialize thresholds according to the global rate table */
for (i = 0 ; (i < pRc->rateTableSize) && (!keepState); i++) {
pRc->state[i].rssiThres = pRateTable->info[i].rssiAckValidMin;
pRc->state[i].per = 0;
}
/* Determine the valid rates */
rcInitValidTxMask(pRc);
rateCount = pRateTable->rateCount;
#ifdef notyet
if (wlanIs5211Channel14(pSib)) {
rateCount = 2;
}
#endif
count = 0;
if (!pRateSet->rs_nrates) {
/* No working rate, use valid rates */
for (i = 0; i < rateCount; i++) {
if (pRateTable->info[i].valid == TRUE) {
pRc->validRateIndex[count] = i;
count ++;
rcSetValidTxMask(pRc, i, TRUE);
hi = A_MAX(hi, i);
pSib->rixMap[i] = 0;
}
}
pRc->maxValidRate = count;
pRc->maxValidTurboRate = pRateTable->numTurboRates;
} else {
A_UINT8 turboCount;
A_UINT32 mask;
/* Use intersection of working rates and valid rates */
turboCount = 0;
for (i = 0; i < pRateSet->rs_nrates; i++) {
for (j = 0; j < rateCount; j++) {
if (((pRateSet->rs_rates[i] & 0x7F) == (pRateTable->info[j].dot11Rate & 0x7F)) &&
(pRateTable->info[j].valid == TRUE))
{
rcSetValidTxMask(pRc, j, TRUE);
hi = A_MAX(hi, j);
pSib->rixMap[j] = i;
}
}
}
/* Get actually valid rate index, previous we get it from rate table,
* now get rate table which include all working rate, so we need make
* sure our valid rate table align with working rate */
mask = pRc->validTxRateMask;
for (i = 0; i < pRc->rateTableSize; i ++) {
if (mask & (1 << i)) {
pRc->validRateIndex[count] = i;
count ++;
if (pRateTable->info[i].phy == WLAN_PHY_TURBO) {
turboCount ++;
}
}
}
pRc->maxValidRate = count;
pRc->maxValidTurboRate = turboCount;
}
pRc->rateTableSize = hi + 1;
pRc->rateMax = A_MIN(hi, pRateTable->initialRateMax);
ASSERT(pRc->rateTableSize <= MAX_TX_RATE_TBL);
}
