int iw_get_scan(struct net_device *dev,
struct iw_request_info *info,
union iwreq_data *wrqu, char *extra)
{
hdd_adapter_t *pAdapter = WLAN_HDD_GET_PRIV_PTR(dev) ;
hdd_context_t *pHddCtx = WLAN_HDD_GET_CTX(pAdapter);
tHalHandle hHal = WLAN_HDD_GET_HAL_CTX(pAdapter);
tCsrScanResultInfo *pScanResult;
eHalStatus status = eHAL_STATUS_SUCCESS;
hdd_scan_info_t scanInfo;
tScanResultHandle pResult;
int i = 0;
VOS_TRACE(VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_INFO, "%s: enter buffer length %d!!!",
__func__, (wrqu->data.length)?wrqu->data.length:IW_SCAN_MAX_DATA);
ENTER();
if (TRUE == pHddCtx->scan_info.mScanPending)
{
VOS_TRACE(VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_FATAL, "%s:mScanPending is TRUE !!!",__func__);
return -EAGAIN;
}
if ((WLAN_HDD_GET_CTX(pAdapter))->isLogpInProgress) {
VOS_TRACE(VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_FATAL, "%s:LOGP in Progress. Ignore!!!",__func__);
return -EAGAIN;
}
scanInfo.dev = dev;
scanInfo.start = extra;
scanInfo.info = info;
if (0 == wrqu->data.length)
{
scanInfo.end = extra + IW_SCAN_MAX_DATA;
}
else
{
scanInfo.end = extra + wrqu->data.length;
}
status = sme_ScanGetResult(hHal,pAdapter->sessionId,NULL,&pResult);
if (NULL == pResult)
{
hddLog(LOG1,"iw_get_scan: NULL Scan Result ");
return 0;
}
pScanResult = sme_ScanResultGetFirst(hHal, pResult);
while (pScanResult)
{
status = hdd_IndicateScanResult(&scanInfo, pScanResult);
if (0 != status)
{
break;
}
i++;
pScanResult = sme_ScanResultGetNext(hHal, pResult);
}
sme_ScanResultPurge(hHal, pResult);
EXIT();
VOS_TRACE(VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_INFO, "%s: exit total %d BSS reported !!!",__func__, i);
return status;
}
/*==========================================================================
FUNCTION sapComputeSpectWeight
DESCRIPTION
Main function for computing the weight of each channel in the
spectrum based on the RSSI value of the BSSes on the channel
and number of BSS
DEPENDENCIES
NA.
PARAMETERS
IN
pSpectInfoParams : Pointer to the tSpectInfoParams structure
halHandle : Pointer to HAL handle
pResult : Pointer to tScanResultHandle
RETURN VALUE
void : NULL
SIDE EFFECTS
============================================================================*/
void sapComputeSpectWeight( tSapChSelSpectInfo* pSpectInfoParams,
tHalHandle halHandle, tScanResultHandle pResult)
{
v_S7_t rssi = 0;
v_U8_t chn_num = 0;
v_U8_t channel_id = 0;
tCsrScanResultInfo *pScanResult;
tSapSpectChInfo *pSpectCh = pSpectInfoParams->pSpectCh;
VOS_TRACE( VOS_MODULE_ID_SAP, VOS_TRACE_LEVEL_INFO_HIGH, "In %s, Computing spectral weight", __FUNCTION__);
/**
* Soft AP specific channel weight calculation using DFS formula
*/
pScanResult = sme_ScanResultGetFirst(halHandle, pResult);
while (pScanResult) {
pSpectCh = pSpectInfoParams->pSpectCh;
// Processing for each tCsrScanResultInfo in the tCsrScanResult DLink list
for (chn_num = 0; chn_num < pSpectInfoParams->numSpectChans; chn_num++) {
/*
* if the Beacon has channel ID, use it other wise we will
* rely on the channelIdSelf
*/
if(pScanResult->BssDescriptor.channelId == 0)
channel_id = pScanResult->BssDescriptor.channelIdSelf;
else
channel_id = pScanResult->BssDescriptor.channelId;
if (channel_id == pSpectCh->chNum) {
if (pSpectCh->rssiAgr < pScanResult->BssDescriptor.rssi)
pSpectCh->rssiAgr = pScanResult->BssDescriptor.rssi;
++pSpectCh->bssCount; // Increment the count of BSS
VOS_TRACE(VOS_MODULE_ID_SAP, VOS_TRACE_LEVEL_INFO_HIGH,
"In %s, bssdes.ch_self=%d, bssdes.ch_ID=%d, bssdes.rssi=%d, SpectCh.bssCount=%d, pScanResult=0x%x",
__FUNCTION__, pScanResult->BssDescriptor.channelIdSelf, pScanResult->BssDescriptor.channelId,
pScanResult->BssDescriptor.rssi, pSpectCh->bssCount, pScanResult);
pSpectCh++;
break;
} else {
pSpectCh++;
}
}
pScanResult = sme_ScanResultGetNext(halHandle, pResult);
}
// Calculate the weights for all channels in the spectrum pSpectCh
pSpectCh = pSpectInfoParams->pSpectCh;
VOS_TRACE(VOS_MODULE_ID_SAP, VOS_TRACE_LEVEL_INFO_HIGH, "In %s, Spectrum Channels Weight", __FUNCTION__);
for (chn_num = 0; chn_num < (pSpectInfoParams->numSpectChans); chn_num++) {
/*
rssi : Maximum received signal strength among all BSS on that channel
bssCount : Number of BSS on that channel
*/
rssi = (v_S7_t)pSpectCh->rssiAgr;
pSpectCh->weight = SAPDFS_NORMALISE_1000 * sapweightRssiCount(rssi, pSpectCh->bssCount);
//------ Debug Info ------
VOS_TRACE(VOS_MODULE_ID_SAP, VOS_TRACE_LEVEL_INFO_HIGH, "In %s, Chan=%d Weight= %d rssiAgr=%d bssCount=%d", __FUNCTION__, pSpectCh->chNum,
pSpectCh->weight, pSpectCh->rssiAgr, pSpectCh->bssCount);
//------ Debug Info ------
pSpectCh++;
}
}