/*
==========================================================================
Description:
This routine calaulates the dirtyness of all channels by the
CCA value and Rssi. Store dirtyness to pChannelInfo strcut.
This routine is called at iwpriv cmmand or initialization. It chooses and returns
a good channel whith less interference.
Return:
ch - channel number that
NOTE:
==========================================================================
*/
static inline UCHAR SelectClearChannelCCA(
IN PRTMP_ADAPTER pAd
)
{
#define CCA_THRESHOLD (100)
PBSSINFO pBssInfoTab = pAd->pBssInfoTab;
PCHANNELINFO pChannelInfo = pAd->pChannelInfo;
INT ch = 1, channel_idx, BssTab_idx;
BSSENTRY *pBss;
UINT32 min_dirty, min_falsecca;
int candidate_ch;
UCHAR ExChannel[2] = {0};
UCHAR candidate_ExChannel[2] = {0};
UCHAR base;
if(pBssInfoTab == NULL)
{
DBGPRINT(RT_DEBUG_ERROR, ("pAd->pBssInfoTab equal NULL.\n"));
return (FirstChannel(pAd));
}
if(pChannelInfo == NULL)
{
DBGPRINT(RT_DEBUG_ERROR, ("pAd->pChannelInfo equal NULL.\n"));
return (FirstChannel(pAd));
}
for (BssTab_idx = 0; BssTab_idx < pBssInfoTab->BssNr; BssTab_idx++)
{
pBss = &(pBssInfoTab->BssEntry[BssTab_idx]);
channel_idx = GetChIdx(pAd, pBss->Channel);
if (channel_idx < 0 )
continue;
if (pBss->Rssi >= RSSI_TO_DBM_OFFSET-50)
{
/* high signal >= -50 dbm */
pChannelInfo->dirtyness[channel_idx] += 50;
}
else if (pBss->Rssi <= RSSI_TO_DBM_OFFSET-80)
{
/* low signal <= -80 dbm */
pChannelInfo->dirtyness[channel_idx] += 30;
}
else
{
/* mid signal -50 ~ -80 dbm */
pChannelInfo->dirtyness[channel_idx] += 40;
}
pChannelInfo->dirtyness[channel_idx] += 40;
{
INT BelowBound;
INT AboveBound;
INT loop;
switch(pBss->ExtChOffset)
{
case EXTCHA_ABOVE:
BelowBound = pChannelInfo->IsABand ? 1 : 4;
AboveBound = pChannelInfo->IsABand ? 2 : 8;
break;
case EXTCHA_BELOW:
BelowBound = pChannelInfo->IsABand ? 2 : 8;
AboveBound = pChannelInfo->IsABand ? 1 : 4;
break;
default:
BelowBound = pChannelInfo->IsABand ? 1 : 4;
AboveBound = pChannelInfo->IsABand ? 1 : 4;
break;
}
/* check neighbor channel */
for (loop = (channel_idx+1); loop <= (channel_idx+AboveBound); loop++)
{
if (loop >= MAX_NUM_OF_CHANNELS)
break;
if (pAd->ChannelList[loop].Channel - pAd->ChannelList[loop-1].Channel > 4)
break;
pChannelInfo->dirtyness[loop] +=
((9 - (loop - channel_idx)) * 4);
}
/* check neighbor channel */
for (loop=(channel_idx-1); loop >= (channel_idx-BelowBound); loop--)
{
if (loop < 0)
break;
if (pAd->ChannelList[loop+1].Channel - pAd->ChannelList[loop].Channel > 4)
continue;
pChannelInfo->dirtyness[loop] +=
((9 - (channel_idx - loop)) * 4);
}
}
printk(" ch%d bssid=%02x:%02x:%02x:%02x:%02x:%02x\n",
pBss->Channel, pBss->Bssid[0], pBss->Bssid[1], pBss->Bssid[2], pBss->Bssid[3], pBss->Bssid[4], pBss->Bssid[5]);
}
AutoChannelSkipListSetDirty(pAd);
printk("======================RT309x=========================\n");
for (channel_idx = 0; channel_idx < pAd->ChannelListNum; channel_idx++)
{
printk("Channel %d : Dirty = %ld, False CCA = %u, Busy Time = %u, Skip Channel = %s\n",
pAd->ChannelList[channel_idx].Channel,
pChannelInfo->dirtyness[channel_idx],
pChannelInfo->FalseCCA[channel_idx],
pChannelInfo->chanbusytime[channel_idx],
(pChannelInfo->SkipList[channel_idx] == TRUE) ? "TRUE" : "FALSE");
}
printk("=====================================================\n");
min_dirty = min_falsecca = 0xFFFFFFFF;
/*
* Rule 1. Pick up a good channel that False_CCA =< CCA_THRESHOLD
* by dirtyness
*/
candidate_ch = -1;
for (channel_idx = 0; channel_idx < pAd->ChannelListNum; channel_idx++)
{
if (pChannelInfo->SkipList[channel_idx] == TRUE)
continue;
if (pChannelInfo->FalseCCA[channel_idx] <= CCA_THRESHOLD)
{
UINT32 dirtyness = pChannelInfo->dirtyness[channel_idx];
ch = pAd->ChannelList[channel_idx].Channel;
#ifdef AP_QLOAD_SUPPORT
/* QLOAD ALARM */
/* when busy time of a channel > threshold, skip it */
/* TODO: Use weight for different references to do channel selection */
if (QBSS_LoadIsBusyTimeAccepted(pAd,
pChannelInfo->chanbusytime[channel_idx]) == FALSE)
{
/* check next one */
continue;
}
#endif /* AP_QLOAD_SUPPORT */
#ifdef DOT11_N_SUPPORT
/*
User require 40MHz Bandwidth.
In the case, ignor all channel
doesn't support 40MHz Bandwidth.
*/
if ((pAd->CommonCfg.RegTransmitSetting.field.BW == BW_40)
&& (pChannelInfo->IsABand && (GetABandChOffset(ch) == 0)))
continue;
/*
Need to Consider the dirtyness of extending channel
in 40 MHz bandwidth channel.
*/
if (pAd->CommonCfg.RegTransmitSetting.field.BW == BW_40)
{
if (pAd->pChannelInfo->IsABand)
{
if (((channel_idx + GetABandChOffset(ch)) >=0)
&& ((channel_idx + GetABandChOffset(ch)) < pAd->ChannelListNum))
{
INT ChOffsetIdx = channel_idx + GetABandChOffset(ch);
dirtyness += pChannelInfo->dirtyness[ChOffsetIdx];
}
}
else
{
UCHAR ExChannel_idx = 0;
if (pAd->ChannelList[channel_idx].Channel == 14)
{
dirtyness = 0xFFFFFFFF;
break;
}
else
{
NdisZeroMemory(ExChannel, sizeof(ExChannel));
if (((channel_idx - 4) >=0) && ((channel_idx - 4) < pAd->ChannelListNum))
{
dirtyness += pChannelInfo->dirtyness[channel_idx - 4];
ExChannel[ExChannel_idx++] = pAd->ChannelList[channel_idx - 4].Channel;
}
if (((channel_idx + 4) >=0) && ((channel_idx + 4) < pAd->ChannelListNum))
{
dirtyness += pChannelInfo->dirtyness[channel_idx + 4];
ExChannel[ExChannel_idx++] = pAd->ChannelList[channel_idx + 4].Channel;
}
}
}
}
#endif /* DOT11_N_SUPPORT */
if ((min_dirty > dirtyness))
{
min_dirty = dirtyness;
candidate_ch = channel_idx;
NdisMoveMemory(candidate_ExChannel, ExChannel, 2);
}
}
}
if (candidate_ch >= 0)
{
ch = pAd->ChannelList[candidate_ch].Channel;
printk("Rule 1 CCA value : Min Dirtiness ==> Select Channel %d \n", ch);
printk("Min Dirty = %u\n", min_dirty);
printk("ExChannel = %d , %d\n", candidate_ExChannel[0], candidate_ExChannel[1]);
printk("BW = %s\n", (pAd->CommonCfg.RegTransmitSetting.field.BW == BW_40)? "40" : "20");
return ch;
}
/*
* Rule 2. Pick up a good channel that False_CCA > CCA_THRESHOLD
* by FalseCCA (FalseCCA + Dirtyness)
*/
candidate_ch = -1;
for (channel_idx = 0; channel_idx < pAd->ChannelListNum; channel_idx++)
{
if (pChannelInfo->SkipList[channel_idx] == TRUE)
continue;
if (pChannelInfo->FalseCCA[channel_idx] > CCA_THRESHOLD)
{
UINT32 falsecca = pChannelInfo->FalseCCA[channel_idx] + pChannelInfo->dirtyness[channel_idx];
ch = pAd->ChannelList[channel_idx].Channel;
#ifdef DOT11_N_SUPPORT
if ((pAd->CommonCfg.RegTransmitSetting.field.BW == BW_40)
&& (pChannelInfo->IsABand && (GetABandChOffset(ch) == 0)))
continue;
#endif /* DOT11_N_SUPPORT */
if ((GetABandChOffset(ch) != 0)
&& ((channel_idx + GetABandChOffset(ch)) >=0)
&& ((channel_idx + GetABandChOffset(ch)) < pAd->ChannelListNum))
{
INT ChOffsetIdx = channel_idx + GetABandChOffset(ch);
falsecca += (pChannelInfo->FalseCCA[ChOffsetIdx] +
pChannelInfo->dirtyness[ChOffsetIdx]);
}
#ifdef AP_QLOAD_SUPPORT
/* QLOAD ALARM */
/* when busy time of a channel > threshold, skip it */
/* TODO: Use weight for different references to do channel selection */
if (QBSS_LoadIsBusyTimeAccepted(pAd,
pChannelInfo->chanbusytime[channel_idx]) == FALSE)
{
/* check next one */
continue;
}
#endif /* AP_QLOAD_SUPPORT */
if ((min_falsecca > falsecca))
{
min_falsecca = falsecca;
candidate_ch = channel_idx;
}
}
}
if (candidate_ch >= 0)
{
ch = pAd->ChannelList[candidate_ch].Channel;
printk("Rule 2 CCA value : Min False CCA value ==> Select Channel %d, min falsecca = %d \n", ch, min_falsecca);
return ch;
}
base = RandomByte2(pAd);
for (channel_idx=0 ; channel_idx < pAd->ChannelListNum ; channel_idx++)
{
ch = pAd->ChannelList[(base + channel_idx) % pAd->ChannelListNum].Channel;
if (AutoChannelSkipListCheck(pAd, ch))
continue;
#ifdef A_BAND_SUPPORT
if ((pAd->ApCfg.bAvoidDfsChannel == TRUE)
&& (pChannelInfo->IsABand == TRUE)
&& RadarChannelCheck(pAd, ch))
continue;
#endif
break;
}
printk("Rule 3 CCA value : Randomly Select ==> Select Channel %d\n", ch);
return ch;
}
static inline UCHAR SelectClearChannelApCnt(
IN PRTMP_ADAPTER pAd
)
{
/*PBSSINFO pBssInfoTab = pAd->pBssInfoTab; */
PCHANNELINFO pChannelInfo = pAd->pChannelInfo;
/*BSSENTRY *pBss; */
UCHAR channel_index = 0,dirty,base = 0;
UCHAR final_channel = 0;
if(pChannelInfo == NULL)
{
DBGPRINT(RT_DEBUG_ERROR, ("pAd->pChannelInfo equal NULL.\n"));
return (FirstChannel(pAd));
}
/* Calculate Dirtiness */
for (channel_index=0 ; channel_index < pAd->ChannelListNum ; channel_index++)
{
if (pChannelInfo->ApCnt[channel_index] > 0)
{
INT ll;
pChannelInfo->dirtyness[channel_index] += 30;
/*5G */
if (pChannelInfo->IsABand)
{
int Channel = pAd->ChannelList[channel_index].Channel;
/*Make secondary channel dirty */
if(pAd->CommonCfg.RegTransmitSetting.field.BW == BW_40)
{
if (Channel > 14)
{
if ((Channel == 36) || (Channel == 44) || (Channel == 52) || (Channel== 60)
|| (Channel == 100) || (Channel == 108) || (Channel == 116)
|| (Channel == 124) || (Channel == 132) || (Channel == 149) || (Channel == 157))
{
if (channel_index + 1 < MAX_NUM_OF_CHANNELS)
if(pAd->ChannelList[channel_index+1].Channel - pAd->ChannelList[channel_index].Channel == 4)
pChannelInfo->dirtyness[channel_index+1] += 1;
}
else if ((Channel == 40) || (Channel == 48) || (Channel == 56) ||
(Channel == 64) || (Channel == 104) || (Channel == 112) ||
(Channel == 120) || (Channel == 128) || (Channel == 136) ||
(Channel== 153) || (Channel == 161))
{
if(channel_index - 1 >= 0)
if(pAd->ChannelList[channel_index].Channel - pAd->ChannelList[channel_index-1].Channel == 4)
pChannelInfo->dirtyness[channel_index-1] += 1;
}
}
}
}
/*2.4G */
if (!pChannelInfo->IsABand)
{
int ChanOffset = 0;
if((pAd->CommonCfg.RegTransmitSetting.field.BW == BW_40)&&
(pAd->CommonCfg.RegTransmitSetting.field.EXTCHA == EXTCHA_BELOW))
{
/*
BW is 40Mhz
the distance between two channel to prevent interference
is 4 channel width plus 4 channel width (secondary channel)
*/
ChanOffset = 8;
}
else
{
/*
BW is 20Mhz
The channel width of 2.4G band is 5Mhz.
The distance between two channel to prevent interference is 4 channel width
*/
ChanOffset = 4;
}
for (ll = channel_index + 1; ll < (channel_index + ChanOffset + 1); ll++)
{
if (ll < MAX_NUM_OF_CHANNELS)
pChannelInfo->dirtyness[ll]++;
}
if((pAd->CommonCfg.RegTransmitSetting.field.BW == BW_40)&&
(pAd->CommonCfg.RegTransmitSetting.field.EXTCHA == EXTCHA_ABOVE))
{
/* BW is 40Mhz */
ChanOffset = 8;
}
else
{
/* BW is 20Mhz */
ChanOffset = 4;
}
for (ll = channel_index - 1; ll > (channel_index - ChanOffset - 1); ll--)
{
if (ll >= 0)
pChannelInfo->dirtyness[ll]++;
}
}
}
}/* Calculate Dirtiness */
AutoChannelSkipListSetDirty(pAd);
printk("=====================================================\n");
for (channel_index=0 ; channel_index < pAd->ChannelListNum ; channel_index++)
/* debug messages */
printk("Channel %d : Dirty = %ld, ApCnt=%ld, Busy Time = %d, Skip Channel = %s\n",
pAd->ChannelList[channel_index].Channel,
pChannelInfo->dirtyness[channel_index],
pChannelInfo->ApCnt[channel_index],
pChannelInfo->chanbusytime[channel_index],
(pChannelInfo->SkipList[channel_index] == TRUE) ? "TRUE" : "FALSE");
printk("=====================================================\n");
pAd->ApCfg.AutoChannel_Channel = 0;
/* RULE 1. pick up a good channel that no one used */
for (channel_index=0 ; channel_index < pAd->ChannelListNum ; channel_index++)
{
if (pChannelInfo->SkipList[channel_index] == TRUE)
continue;
#ifdef A_BAND_SUPPORT
if ((pAd->ApCfg.bAvoidDfsChannel == TRUE)
&&(pChannelInfo->IsABand == TRUE)
&& RadarChannelCheck(pAd, pAd->ChannelList[channel_index].Channel))
continue;
#endif
#ifdef AP_QLOAD_SUPPORT
/* QLOAD ALARM */
if (QBSS_LoadIsBusyTimeAccepted(pAd,
pChannelInfo->chanbusytime[channel_index]) == FALSE)
continue;
#endif /* AP_QLOAD_SUPPORT */
if (pChannelInfo->dirtyness[channel_index] == 0) break;
}
if (channel_index < pAd->ChannelListNum)
{
printk("Rule 1 APCnt : dirtiness == 0 (no one used and no interference) ==> Select Channel %d\n", pAd->ChannelList[channel_index].Channel);
return pAd->ChannelList[channel_index].Channel;
}
/* RULE 2. if not available, then co-use a channel that's no interference (dirtyness=30) */
/* RULE 3. if not available, then co-use a channel that has minimum interference (dirtyness=31,32) */
for (dirty = 30; dirty <= 32; dirty++)
{
BOOLEAN candidate[MAX_NUM_OF_CHANNELS+1], candidate_num=0;
UCHAR min_ApCnt = 255;
final_channel = 0;
NdisZeroMemory(candidate, MAX_NUM_OF_CHANNELS+1);
for (channel_index=0 ; channel_index < pAd->ChannelListNum ; channel_index++)
{
if (pChannelInfo->SkipList[channel_index] == TRUE)
continue;
if (pChannelInfo->dirtyness[channel_index] == dirty)
{
candidate[channel_index]=TRUE;
candidate_num++;
}
}
/* if there's more than 1 candidate, pick up the channel with minimum RSSI */
if (candidate_num)
{
for (channel_index=0 ; channel_index < pAd->ChannelListNum ; channel_index++)
{
#ifdef AP_QLOAD_SUPPORT
/* QLOAD ALARM */
/* when busy time of a channel > threshold, skip it */
/* TODO: Use weight for different references to do channel selection */
if (QBSS_LoadIsBusyTimeAccepted(pAd,
pChannelInfo->chanbusytime[channel_index]) == FALSE)
{
/* check next one */
continue;
}
#endif /* AP_QLOAD_SUPPORT */
if (candidate[channel_index] && (pChannelInfo->ApCnt[channel_index] < min_ApCnt))
{
if((pAd->CommonCfg.RegTransmitSetting.field.BW == BW_40)
&& (BW40_ChannelCheck(pAd->ChannelList[channel_index].Channel) == FALSE))
continue;
#ifdef A_BAND_SUPPORT
if ((pAd->ApCfg.bAvoidDfsChannel == TRUE)
&&(pChannelInfo->IsABand == TRUE)
&& RadarChannelCheck(pAd, pAd->ChannelList[channel_index].Channel))
continue;
#endif
final_channel = pAd->ChannelList[channel_index].Channel;
min_ApCnt = pChannelInfo->ApCnt[channel_index];
}
}
if (final_channel != 0)
{
printk("Rule 2 APCnt : minimum APCnt with minimum interference(dirtiness: 30~32) ==> Select Channel %d\n", final_channel);
printk(" Dirtiness = %d , Min ApCnt = %d\n", dirty, min_ApCnt);
return final_channel;
}
}
}
/* RULE 3. still not available, pick up the random channel */
base = RandomByte2(pAd);
for (channel_index=0 ; channel_index < pAd->ChannelListNum ; channel_index++)
{
final_channel = pAd->ChannelList[(base + channel_index) % pAd->ChannelListNum].Channel;
if (AutoChannelSkipListCheck(pAd, final_channel))
continue;
#ifdef A_BAND_SUPPORT
if ((pAd->ApCfg.bAvoidDfsChannel == TRUE)
&&(pChannelInfo->IsABand == TRUE)
&& RadarChannelCheck(pAd, final_channel))
continue;
#endif
break;
}
printk("Rule 3 APCnt : Randomly Select ==> Select Channel %d\n",final_channel);
return final_channel;
}
static inline UCHAR SelectClearChannelBusyTime(
IN PRTMP_ADAPTER pAd
)
{
PCHANNELINFO pChannelInfo = pAd->pChannelInfo;
INT ch = 1, channel_idx;
UINT32 min_busytime;
int candidate_ch;
UCHAR base;
if(pChannelInfo == NULL)
{
MTWF_LOG(DBG_CAT_ALL, DBG_SUBCAT_ALL, DBG_LVL_ERROR, ("pAd->pChannelInfo equal NULL.\n"));
return (FirstChannel(pAd));
}
AutoChannelSkipListSetDirty(pAd);
MTWF_LOG(DBG_CAT_ALL, DBG_SUBCAT_ALL, DBG_LVL_TRACE, ("=====================================================\n"));
for (channel_idx = 0; channel_idx < pAd->ChannelListNum; channel_idx++)
{
MTWF_LOG(DBG_CAT_ALL, DBG_SUBCAT_ALL, DBG_LVL_TRACE, ("Channel %d : Busy Time = %u, Skip Channel = %s\n",
pAd->ChannelList[channel_idx].Channel,
pChannelInfo->chanbusytime[channel_idx],
(pChannelInfo->SkipList[channel_idx] == TRUE) ? "TRUE" : "FALSE"));
}
MTWF_LOG(DBG_CAT_ALL, DBG_SUBCAT_ALL, DBG_LVL_TRACE, ("=====================================================\n"));
min_busytime = 0xFFFFFFFF;
candidate_ch = -1;
for (channel_idx = 0; channel_idx < pAd->ChannelListNum; channel_idx++)
{
if (pChannelInfo->SkipList[channel_idx] == TRUE)
continue;
if (pChannelInfo->chanbusytime[channel_idx] < min_busytime)
{
min_busytime = pChannelInfo->chanbusytime[channel_idx];
candidate_ch = channel_idx;
}
}
if (candidate_ch >= 0)
{
ch = pAd->ChannelList[candidate_ch].Channel;
MTWF_LOG(DBG_CAT_ALL, DBG_SUBCAT_ALL, DBG_LVL_TRACE, ("Rule 3 Channel Busy time value : Min Channel Busy ==> Select Channel %d \n", ch));
MTWF_LOG(DBG_CAT_ALL, DBG_SUBCAT_ALL, DBG_LVL_TRACE, ("Min Channel Busy = %u\n", min_busytime));
MTWF_LOG(DBG_CAT_ALL, DBG_SUBCAT_ALL, DBG_LVL_TRACE, ("BW = %s\n", (pAd->CommonCfg.RegTransmitSetting.field.BW == BW_40)? "40" : "20"));
return ch;
}
base = RandomByte2(pAd);
for (channel_idx=0 ; channel_idx < pAd->ChannelListNum ; channel_idx++)
{
ch = pAd->ChannelList[(base + channel_idx) % pAd->ChannelListNum].Channel;
if (AutoChannelSkipListCheck(pAd, ch))
continue;
if ((pAd->ApCfg.bAvoidDfsChannel == TRUE)
&& (pChannelInfo->IsABand == TRUE)
&& RadarChannelCheck(pAd, ch))
continue;
break;
}
MTWF_LOG(DBG_CAT_ALL, DBG_SUBCAT_ALL, DBG_LVL_TRACE, ("Randomly Select ==> Select Channel %d\n", ch));
return ch;
}