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android / kernel / msm / 2be894ddcc24a06eef597dfb64a0336ba1a6baac / . / drivers / staging / qcacld-3.0 / core / sap / src / sap_ch_select.c
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/*
* Copyright (c) 2012-2018 The Linux Foundation. All rights reserved.
*
* Previously licensed under the ISC license by Qualcomm Atheros, Inc.
*
*
* Permission to use, copy, modify, and/or distribute this software for
* any purpose with or without fee is hereby granted, provided that the
* above copyright notice and this permission notice appear in all
* copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
* WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
* AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
* DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
* PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
/*
* This file was originally distributed by Qualcomm Atheros, Inc.
* under proprietary terms before Copyright ownership was assigned
* to the Linux Foundation.
*/
/*===========================================================================
s a p C h S e l e c t . C
OVERVIEW:
This software unit holds the implementation of the WLAN SAP modules
functions for channel selection.
DEPENDENCIES:
Are listed for each API below.
===========================================================================*/
/*--------------------------------------------------------------------------
Include Files
------------------------------------------------------------------------*/
#include "qdf_trace.h"
#include "csr_api.h"
#include "sme_api.h"
#include "sap_ch_select.h"
#include "sap_internal.h"
#ifdef ANI_OS_TYPE_QNX
#include "stdio.h"
#endif
#ifdef FEATURE_AP_MCC_CH_AVOIDANCE
#include "lim_utils.h"
#include "parser_api.h"
#endif /* FEATURE_AP_MCC_CH_AVOIDANCE */
#include "cds_utils.h"
#include "pld_common.h"
#include "cds_concurrency.h"
/*--------------------------------------------------------------------------
Function definitions
--------------------------------------------------------------------------*/
/*--------------------------------------------------------------------------
Defines
--------------------------------------------------------------------------*/
#define SAP_DEBUG
#define IS_RSSI_VALID(extRssi, rssi) \
( \
((extRssi < rssi) ? true : false) \
)
#define SET_ACS_BAND(acs_band, pSapCtx) \
{ \
if (pSapCtx->acs_cfg->start_ch <= 14 && \
pSapCtx->acs_cfg->end_ch <= 14) \
acs_band = eCSR_DOT11_MODE_11g; \
else if (pSapCtx->acs_cfg->start_ch >= 14)\
acs_band = eCSR_DOT11_MODE_11a; \
else \
acs_band = eCSR_DOT11_MODE_abg; \
}
#define GET_IE_LEN_IN_BSS_DESC(lenInBss) (lenInBss + sizeof(lenInBss) - \
((uintptr_t)OFFSET_OF(tSirBssDescription, ieFields)))
#define ACS_WEIGHT_AMOUNT_LOCAL 240
#define ACS_WEIGHT_AMOUNT_CONFIG(weights) \
(((weights) & 0xf) + \
(((weights) & 0xf0) >> 4) + \
(((weights) & 0xf00) >> 8) + \
(((weights) & 0xf000) >> 12) + \
(((weights) & 0xf0000) >> 16) + \
(((weights) & 0xf00000) >> 20))
/*
* LSH/RSH 4 to enhance the accurate since
* need to do modulation to ACS_WEIGHT_AMOUNT_LOCAL.
*/
#define ACS_WEIGHT_COMPUTE(weights, weight, factor, base) \
(((((((((weight) << 4) * ACS_WEIGHT_AMOUNT_LOCAL * (factor)) + \
(ACS_WEIGHT_AMOUNT_CONFIG((weights)) >> 1)) / \
ACS_WEIGHT_AMOUNT_CONFIG((weights))) + \
((base) >> 1)) / (base)) + 8) >> 4)
#define ACS_WEIGHT_CFG_TO_LOCAL(weights, weight) \
(((((((weight) << 4) * ACS_WEIGHT_AMOUNT_LOCAL) + \
(ACS_WEIGHT_AMOUNT_CONFIG((weights)) >> 1)) / \
ACS_WEIGHT_AMOUNT_CONFIG((weights))) + 8) >> 4)
#define ACS_WEIGHT_SOFTAP_RSSI_CFG(weights) \
((weights) & 0xf)
#define ACS_WEIGHT_SOFTAP_COUNT_CFG(weights) \
(((weights) & 0xf0) >> 4)
#define ACS_WEIGHT_SOFTAP_NOISE_FLOOR_CFG(weights) \
(((weights) & 0xf00) >> 8)
#define ACS_WEIGHT_SOFTAP_CHANNEL_FREE_CFG(weights) \
(((weights) & 0xf000) >> 12)
#define ACS_WEIGHT_SOFTAP_TX_POWER_RANGE_CFG(weights) \
(((weights) & 0xf0000) >> 16)
#define ACS_WEIGHT_SOFTAP_TX_POWER_THROUGHPUT_CFG(weights) \
(((weights) & 0xf00000) >> 20)
#ifdef FEATURE_WLAN_CH_AVOID
sapSafeChannelType safe_channels[NUM_CHANNELS] = {
{1, true},
{2, true},
{3, true},
{4, true},
{5, true},
{6, true},
{7, true},
{8, true},
{9, true},
{10, true},
{11, true},
{12, true},
{13, true},
{14, true},
{36, true},
{40, true},
{44, true},
{48, true},
{52, true},
{56, true},
{60, true},
{64, true},
{100, true},
{104, true},
{108, true},
{112, true},
{116, true},
{120, true},
{124, true},
{128, true},
{132, true},
{136, true},
{140, true},
{144, true},
{149, true},
{153, true},
{157, true},
{161, true},
{165, true},
{169, true},
{173, true},
};
#endif
typedef struct {
uint16_t chStartNum;
uint32_t weight;
} sapAcsChannelInfo;
sapAcsChannelInfo acs_ht40_channels5_g[] = {
{36, SAP_ACS_WEIGHT_MAX},
{44, SAP_ACS_WEIGHT_MAX},
{52, SAP_ACS_WEIGHT_MAX},
{60, SAP_ACS_WEIGHT_MAX},
{100, SAP_ACS_WEIGHT_MAX},
{108, SAP_ACS_WEIGHT_MAX},
{116, SAP_ACS_WEIGHT_MAX},
{124, SAP_ACS_WEIGHT_MAX},
{132, SAP_ACS_WEIGHT_MAX},
{140, SAP_ACS_WEIGHT_MAX},
{149, SAP_ACS_WEIGHT_MAX},
{157, SAP_ACS_WEIGHT_MAX},
};
sapAcsChannelInfo acs_ht80_channels[] = {
{36, SAP_ACS_WEIGHT_MAX},
{52, SAP_ACS_WEIGHT_MAX},
{100, SAP_ACS_WEIGHT_MAX},
{116, SAP_ACS_WEIGHT_MAX},
{132, SAP_ACS_WEIGHT_MAX},
{149, SAP_ACS_WEIGHT_MAX},
};
sapAcsChannelInfo acs_vht160_channels[] = {
{36, SAP_ACS_WEIGHT_MAX},
{100, SAP_ACS_WEIGHT_MAX},
};
sapAcsChannelInfo acs_ht40_channels24_g[] = {
{1, SAP_ACS_WEIGHT_MAX},
{2, SAP_ACS_WEIGHT_MAX},
{3, SAP_ACS_WEIGHT_MAX},
{4, SAP_ACS_WEIGHT_MAX},
{9, SAP_ACS_WEIGHT_MAX},
};
#define CHANNEL_165 165
/* rssi discount for channels in PCL */
#define PCL_RSSI_DISCOUNT 10
#ifdef FEATURE_AP_MCC_CH_AVOIDANCE
/**
* sap_check_n_add_channel() - checks and add given channel in sap context's
* avoid_channels_info struct
* @sap_ctx: sap context.
* @new_channel: channel to be added to sap_ctx's avoid ch info
*
* sap_ctx contains sap_avoid_ch_info strcut containing the list of channels on
* which MDM device's AP with MCC was detected. This function will add channels
* to that list after checking for duplicates.
*
* Return: true: if channel was added or already present
* else false: if channel list was already full.
*/
static bool
sap_check_n_add_channel(ptSapContext sap_ctx,
uint8_t new_channel)
{
uint8_t i = 0;
struct sap_avoid_channels_info *ie_info =
&sap_ctx->sap_detected_avoid_ch_ie;
for (i = 0; i < sizeof(ie_info->channels); i++) {
if (ie_info->channels[i] == new_channel)
break;
if (ie_info->channels[i] == 0) {
ie_info->channels[i] = new_channel;
break;
}
}
if (i == sizeof(ie_info->channels))
return false;
else
return true;
}
/**
* sap_check_n_add_overlapped_chnls() - checks & add overlapped channels
* to primary channel in 2.4Ghz band.
* @sap_ctx: sap context.
* @primary_chnl: primary channel to be avoided.
*
* sap_ctx contains sap_avoid_ch_info struct containing the list of channels on
* which MDM device's AP with MCC was detected. This function will add channels
* to that list after checking for duplicates.
*
* Return: true: if channel was added or already present
* else false: if channel list was already full.
*/
static bool
sap_check_n_add_overlapped_chnls(ptSapContext sap_ctx, uint8_t primary_channel)
{
uint8_t i = 0, j = 0, upper_chnl = 0, lower_chnl = 0;
struct sap_avoid_channels_info *ie_info =
&sap_ctx->sap_detected_avoid_ch_ie;
/*
* if primary channel less than channel 1 or out of 2g band then
* no further process is required. return true in this case.
*/
if (primary_channel < CHANNEL_1 || primary_channel > CHANNEL_14)
return true;
/* lower channel is one channel right before primary channel */
lower_chnl = primary_channel - 1;
/* upper channel is one channel right after primary channel */
upper_chnl = primary_channel + 1;
/* lower channel needs to be non-zero, zero is not valid channel */
if (lower_chnl > (CHANNEL_1 - 1)) {
for (i = 0; i < sizeof(ie_info->channels); i++) {
if (ie_info->channels[i] == lower_chnl)
break;
if (ie_info->channels[i] == 0) {
ie_info->channels[i] = lower_chnl;
break;
}
}
}
/* upper channel needs to be atleast last channel in 2.4Ghz band */
if (upper_chnl < (CHANNEL_14 + 1)) {
for (j = 0; j < sizeof(ie_info->channels); j++) {
if (ie_info->channels[j] == upper_chnl)
break;
if (ie_info->channels[j] == 0) {
ie_info->channels[j] = upper_chnl;
break;
}
}
}
if (i == sizeof(ie_info->channels) || j == sizeof(ie_info->channels))
return false;
else
return true;
}
/**
* sap_process_avoid_ie() - processes the detected Q2Q IE
* context's avoid_channels_info struct
* @hal: hal handle
* @sap_ctx: sap context.
* @scan_result: scan results for ACS scan.
* @spect_info: spectrum weights array to update
*
* Detection of Q2Q IE indicates presence of another MDM device with its AP
* operating in MCC mode. This function parses the scan results and processes
* the Q2Q IE if found. It then extracts the channels and populates them in
* sap_ctx struct. It also increases the weights of those channels so that
* ACS logic will avoid those channels in its selection algorithm.
*
* Return: void
*/
static void sap_process_avoid_ie(tHalHandle hal,
ptSapContext sap_ctx,
tScanResultHandle scan_result,
tSapChSelSpectInfo *spect_info)
{
uint32_t total_ie_len = 0;
uint8_t *temp_ptr = NULL;
uint8_t i = 0;
struct sAvoidChannelIE *avoid_ch_ie;
tCsrScanResultInfo *node = NULL;
tpAniSirGlobal mac_ctx = NULL;
tSapSpectChInfo *spect_ch = NULL;
mac_ctx = PMAC_STRUCT(hal);
spect_ch = spect_info->pSpectCh;
node = sme_scan_result_get_first(hal, scan_result);
while (node) {
total_ie_len =
GET_IE_LEN_IN_BSS_DESC(node->BssDescriptor.length);
temp_ptr = cfg_get_vendor_ie_ptr_from_oui(mac_ctx,
SIR_MAC_QCOM_VENDOR_OUI,
SIR_MAC_QCOM_VENDOR_SIZE,
((uint8_t *)&node->BssDescriptor.ieFields),
total_ie_len);
if (temp_ptr) {
avoid_ch_ie = (struct sAvoidChannelIE *)temp_ptr;
if (avoid_ch_ie->type !=
QCOM_VENDOR_IE_MCC_AVOID_CH) {
node = sme_scan_result_get_next(hal,
scan_result);
continue;
}
sap_ctx->sap_detected_avoid_ch_ie.present = 1;
QDF_TRACE(QDF_MODULE_ID_SAP,
QDF_TRACE_LEVEL_DEBUG,
"Q2Q IE - avoid ch %d",
avoid_ch_ie->channel);
/* add this channel to to_avoid channel list */
sap_check_n_add_channel(sap_ctx,
avoid_ch_ie->channel);
sap_check_n_add_overlapped_chnls(sap_ctx,
avoid_ch_ie->channel);
/*
* Mark weight of these channel present in IE to MAX
* so that ACS logic will to avoid thse channels
*/
for (i = 0; i < spect_info->numSpectChans; i++)
if (spect_ch[i].chNum == avoid_ch_ie->channel) {
/*
* weight is set more than max so that,
* in the case of other channels being
* assigned max weight due to noise,
* they may be preferred over channels
* with Q2Q IE.
*/
spect_ch[i].weight = SAP_ACS_WEIGHT_MAX + 1;
spect_ch[i].weight_copy =
SAP_ACS_WEIGHT_MAX + 1;
break;
}
} /* if (temp_ptr) */
node = sme_scan_result_get_next(hal, scan_result);
}
}
#endif /* FEATURE_AP_MCC_CH_AVOIDANCE */
#ifdef FEATURE_WLAN_CH_AVOID
/*==========================================================================
FUNCTION sap_update_unsafe_channel_list
DESCRIPTION
Function Undate unsafe channel list table
DEPENDENCIES
NA.
IN
SapContext pointer
RETURN VALUE
NULL
============================================================================*/
void sap_update_unsafe_channel_list(ptSapContext pSapCtx)
{
uint16_t i, j;
uint16_t unsafe_channel_list[NUM_CHANNELS];
uint16_t unsafe_channel_count = 0;
qdf_device_t qdf_ctx = cds_get_context(QDF_MODULE_ID_QDF_DEVICE);
if (!qdf_ctx) {
QDF_TRACE(QDF_MODULE_ID_SAP, QDF_TRACE_LEVEL_FATAL,
"qdf_ctx is NULL");
return;
}
/* Flush, default set all channel safe */
for (i = 0; i < NUM_CHANNELS; i++) {
safe_channels[i].isSafe = true;
}
/* Try to find unsafe channel */
#if defined(FEATURE_WLAN_STA_AP_MODE_DFS_DISABLE)
for (i = 0; i < NUM_CHANNELS; i++) {
if (pSapCtx->dfs_ch_disable == true) {
if (CDS_IS_DFS_CH(safe_channels[i].channelNumber)) {
safe_channels[i].isSafe = false;
QDF_TRACE(QDF_MODULE_ID_SAP,
QDF_TRACE_LEVEL_DEBUG,
"%s: DFS Ch %d is not safe in"
" Concurrent mode",
__func__,
safe_channels[i].channelNumber);
}
}
}
#endif
pld_get_wlan_unsafe_channel(qdf_ctx->dev,
unsafe_channel_list,
&unsafe_channel_count,
sizeof(unsafe_channel_list));
for (i = 0; i < unsafe_channel_count; i++) {
for (j = 0; j < NUM_CHANNELS; j++) {
if (safe_channels[j].channelNumber ==
unsafe_channel_list[i]) {
/* Found unsafe channel, update it */
safe_channels[j].isSafe = false;
QDF_TRACE(QDF_MODULE_ID_SAP,
QDF_TRACE_LEVEL_DEBUG,
FL("CH %d is not safe"),
unsafe_channel_list[i]);
break;
}
}
}
return;
}
#endif /* FEATURE_WLAN_CH_AVOID */
/*==========================================================================
FUNCTION sap_cleanup_channel_list
DESCRIPTION
Function sap_cleanup_channel_list frees up the memory allocated to the channel list.
DEPENDENCIES
NA.
PARAMETERS
IN
NULL
RETURN VALUE
NULL
============================================================================*/
void sap_cleanup_channel_list(void *p_cds_gctx)
{
ptSapContext pSapCtx;
QDF_TRACE(QDF_MODULE_ID_SAP, QDF_TRACE_LEVEL_DEBUG,
"Cleaning up the channel list structure");
if (NULL == p_cds_gctx) {
QDF_TRACE(QDF_MODULE_ID_SAP, QDF_TRACE_LEVEL_FATAL,
"SAP Global Context is NULL");
return;
}
pSapCtx = CDS_GET_SAP_CB(p_cds_gctx);
if (NULL == pSapCtx) {
QDF_TRACE(QDF_MODULE_ID_SAP, QDF_TRACE_LEVEL_FATAL,
"SAP Context is NULL");
return;
}
pSapCtx->SapChnlList.numChannel = 0;
if (pSapCtx->SapChnlList.channelList) {
qdf_mem_free(pSapCtx->SapChnlList.channelList);
pSapCtx->SapChnlList.channelList = NULL;
}
pSapCtx->SapAllChnlList.numChannel = 0;
if (pSapCtx->SapAllChnlList.channelList) {
qdf_mem_free(pSapCtx->SapAllChnlList.channelList);
pSapCtx->SapAllChnlList.channelList = NULL;
}
}
/**
* sap_channel_in_acs_channel_list() - check if channel in acs channel list
* @channel_num: channel to check
* @sap_ctx: struct ptSapContext
* @spect_info_params: strcut tSapChSelSpectInfo
*
* This function checks if specified channel is in the configured ACS channel
* list.
*
* Return: channel number if in acs channel list or SAP_CHANNEL_NOT_SELECTED
*/
uint8_t sap_channel_in_acs_channel_list(uint8_t channel_num,
ptSapContext sap_ctx,
tSapChSelSpectInfo *spect_info_params)
{
uint8_t i = 0;
if ((NULL == sap_ctx->acs_cfg->ch_list) ||
(NULL == spect_info_params))
return channel_num;
if (channel_num > 0 && channel_num <= 252) {
for (i = 0; i < sap_ctx->acs_cfg->ch_list_count; i++) {
if ((sap_ctx->acs_cfg->ch_list[i]) == channel_num)
return channel_num;
}
return SAP_CHANNEL_NOT_SELECTED;
} else {
return SAP_CHANNEL_NOT_SELECTED;
}
}
/**
* sap_select_preferred_channel_from_channel_list() - to calc best cahnnel
* @best_chnl: best channel already calculated among all the chanels
* @sap_ctx: sap context
* @spectinfo_param: Pointer to tSapChSelSpectInfo structure
*
* This function calculates the best channel among the configured channel list.
* If channel list not configured then returns the best channel calculated
* among all the channel list.
*
* Return: uint8_t best channel
*/
static
uint8_t sap_select_preferred_channel_from_channel_list(uint8_t best_chnl,
ptSapContext sap_ctx,
tSapChSelSpectInfo *spectinfo_param)
{
uint8_t i = 0;
/*
* If Channel List is not Configured don't do anything
* Else return the Best Channel from the Channel List
*/
if ((NULL == sap_ctx->acs_cfg->ch_list) ||
(NULL == spectinfo_param) ||
(0 == sap_ctx->acs_cfg->ch_list_count))
return best_chnl;
if (best_chnl <= 0 || best_chnl > 252)
return SAP_CHANNEL_NOT_SELECTED;
for (i = 0; i < sap_ctx->acs_cfg->ch_list_count; i++) {
if ((sap_ctx->acs_cfg->ch_list[i] == best_chnl) &&
!(CDS_IS_DFS_CH(best_chnl) && cds_disallow_mcc(best_chnl))) {
QDF_TRACE(QDF_MODULE_ID_SAP,
QDF_TRACE_LEVEL_INFO,
"Best channel so far is: %d",
best_chnl);
return best_chnl;
}
}
return SAP_CHANNEL_NOT_SELECTED;
}
/*==========================================================================
FUNCTION sap_chan_sel_init
DESCRIPTION
Function sap_chan_sel_init allocates the memory, intializes the
structures used by the channel selection algorithm
DEPENDENCIES
NA.
PARAMETERS
IN
halHandle : Pointer to tHalHandle
*pSpectInfoParams : Pointer to tSapChSelSpectInfo structure
pSapCtx : Pointer to SAP Context
RETURN VALUE
bool: Success or FAIL
SIDE EFFECTS
============================================================================*/
static bool sap_chan_sel_init(tHalHandle halHandle,
tSapChSelSpectInfo *pSpectInfoParams,
ptSapContext pSapCtx)
{
tSapSpectChInfo *pSpectCh = NULL;
uint8_t *pChans = NULL;
uint16_t channelnum = 0;
tpAniSirGlobal pMac = PMAC_STRUCT(halHandle);
bool chSafe = true;
#ifdef FEATURE_WLAN_CH_AVOID
uint16_t i;
#endif
uint32_t dfs_master_cap_enabled;
bool include_dfs_ch = true;
bool sta_sap_scc_on_dfs_chan =
cds_is_sta_sap_scc_allowed_on_dfs_channel();
uint8_t chan_num;
QDF_TRACE(QDF_MODULE_ID_SAP, QDF_TRACE_LEVEL_INFO_HIGH, "In %s",
__func__);
pSpectInfoParams->numSpectChans =
pMac->scan.base_channels.numChannels;
/* Allocate memory for weight computation of 2.4GHz */
pSpectCh =
(tSapSpectChInfo *) qdf_mem_malloc((pSpectInfoParams->numSpectChans)
* sizeof(*pSpectCh));
if (pSpectCh == NULL) {
QDF_TRACE(QDF_MODULE_ID_SAP, QDF_TRACE_LEVEL_ERROR,
"In %s, QDF_MALLOC_ERR", __func__);
return false;
}
/* Initialize the pointers in the DfsParams to the allocated memory */
pSpectInfoParams->pSpectCh = pSpectCh;
pChans = pMac->scan.base_channels.channelList;
#if defined(FEATURE_WLAN_STA_AP_MODE_DFS_DISABLE)
if (pSapCtx->dfs_ch_disable == true)
include_dfs_ch = false;
#endif
sme_cfg_get_int(halHandle, WNI_CFG_DFS_MASTER_ENABLED,
&dfs_master_cap_enabled);
if (dfs_master_cap_enabled == 0 ||
ACS_DFS_MODE_DISABLE == pSapCtx->dfs_mode)
include_dfs_ch = false;
/* Fill the channel number in the spectrum in the operating freq band */
for (channelnum = 0;
channelnum < pSpectInfoParams->numSpectChans;
channelnum++, pChans++, pSpectCh++) {
chSafe = true;
/* check if the channel is in NOL blacklist */
if (sap_dfs_is_channel_in_nol_list(pSapCtx, *pChans,
PHY_SINGLE_CHANNEL_CENTERED)) {
QDF_TRACE(QDF_MODULE_ID_SAP, QDF_TRACE_LEVEL_INFO_HIGH,
"In %s, Ch %d is in NOL list", __func__,
*pChans);
chSafe = false;
continue;
}
if ((include_dfs_ch == false) || sta_sap_scc_on_dfs_chan) {
if (CDS_IS_DFS_CH(*pChans)) {
chSafe = false;
QDF_TRACE(QDF_MODULE_ID_SAP,
QDF_TRACE_LEVEL_INFO_HIGH,
"In %s, DFS Ch %d not considered for ACS. include_dfs_ch %u, sta_sap_scc_on_dfs_chan %d",
__func__, *pChans, include_dfs_ch,
sta_sap_scc_on_dfs_chan);
continue;
}
}
#ifdef FEATURE_WLAN_CH_AVOID
for (i = 0; i < NUM_CHANNELS; i++) {
if ((safe_channels[i].channelNumber == *pChans) &&
(false == safe_channels[i].isSafe)) {
QDF_TRACE(QDF_MODULE_ID_SAP,
QDF_TRACE_LEVEL_DEBUG,
"In %s, Ch %d is not safe", __func__,
*pChans);
chSafe = false;
break;
}
}
#endif /* FEATURE_WLAN_CH_AVOID */
/* OFDM rates are not supported on channel 14 */
if (*pChans == 14 &&
eCSR_DOT11_MODE_11b != pSapCtx->csr_roamProfile.phyMode) {
continue;
}
/* Skip DSRC channels */
if (cds_is_dsrc_channel(cds_chan_to_freq(*pChans)))
continue;
if (!pSapCtx->enable_etsi_srd_chan_support &&
cds_is_etsi13_regdmn_srd_chan(
cds_chan_to_freq(*pChans)))
continue;
if (true == chSafe) {
pSpectCh->chNum = *pChans;
pSpectCh->valid = true;
pSpectCh->rssiAgr = SOFTAP_MIN_RSSI; /* Initialise for all channels */
pSpectCh->channelWidth = SOFTAP_HT20_CHANNELWIDTH; /* Initialise 20MHz for all the Channels */
/* Initialise max ACS weight for all channels */
pSpectCh->weight = SAP_ACS_WEIGHT_MAX;
for (chan_num = 0; chan_num < pSapCtx->num_of_channel;
chan_num++) {
if (pSpectCh->chNum !=
pSapCtx->channelList[chan_num])
continue;
/*
* Initialize ACS weight to 0 for channels
* present in sap context scan channel list
*/
pSpectCh->weight = 0;
break;
}
}
}
return true;
}
/**
* sapweight_rssi_count() - calculates the channel weight due to rssi
and data count(here number of BSS observed)
* @sap_ctx: softap context
* @rssi: Max signal strength receieved from a BSS for the channel
* @count: Number of BSS observed in the channel
*
* Return: Calculated channel weight based on above two
*/
static
uint32_t sapweight_rssi_count(ptSapContext sap_ctx, int8_t rssi,
uint16_t count)
{
int32_t rssi_weight = 0;
int32_t count_weight = 0;
uint32_t rssi_cnt_weight = 0;
uint8_t softap_rssi_weight_cfg, softap_count_weight_cfg;
uint8_t softap_rssi_weight_local, softap_count_weight_local;
softap_rssi_weight_cfg =
ACS_WEIGHT_SOFTAP_RSSI_CFG(sap_ctx->auto_channel_select_weight);
softap_count_weight_cfg =
ACS_WEIGHT_SOFTAP_COUNT_CFG(sap_ctx->auto_channel_select_weight);
softap_rssi_weight_local =
ACS_WEIGHT_CFG_TO_LOCAL(sap_ctx->auto_channel_select_weight,
softap_rssi_weight_cfg);
softap_count_weight_local =
ACS_WEIGHT_CFG_TO_LOCAL(sap_ctx->auto_channel_select_weight,
softap_count_weight_cfg);
/* Weight from RSSI */
rssi_weight = ACS_WEIGHT_COMPUTE(sap_ctx->auto_channel_select_weight,
softap_rssi_weight_cfg,
rssi - SOFTAP_MIN_RSSI,
SOFTAP_MAX_RSSI - SOFTAP_MIN_RSSI);
if (rssi_weight > softap_rssi_weight_local)
rssi_weight = softap_rssi_weight_local;
else if (rssi_weight < 0)
rssi_weight = 0;
/* Weight from data count */
count_weight = ACS_WEIGHT_COMPUTE(sap_ctx->auto_channel_select_weight,
softap_count_weight_cfg,
count - SOFTAP_MIN_COUNT,
SOFTAP_MAX_COUNT - SOFTAP_MIN_COUNT);
if (count_weight > softap_count_weight_local)
count_weight = softap_count_weight_local;
rssi_cnt_weight = rssi_weight + count_weight;
QDF_TRACE(QDF_MODULE_ID_SAP, QDF_TRACE_LEVEL_INFO_HIGH,
"In %s, rssiWeight=%d, countWeight=%d, rssicountWeight=%d",
__func__, rssi_weight, count_weight, rssi_cnt_weight);
return rssi_cnt_weight;
}
/**
* sap_get_channel_status() - get channel info via channel number
* @p_mac: Pointer to Global MAC structure
* @channel_id: channel id
*
* Return: chan status info
*/
static struct lim_channel_status *sap_get_channel_status
(tpAniSirGlobal p_mac, uint32_t channel_id)
{
return csr_get_channel_status(p_mac, channel_id);
}
/**
* sap_clear_channel_status() - clear chan info
* @p_mac: Pointer to Global MAC structure
*
* Return: none
*/
static void sap_clear_channel_status(tpAniSirGlobal p_mac)
{
csr_clear_channel_status(p_mac);
}
/**
* sap_weight_channel_noise_floor() - compute noise floor weight
* @sap_ctx: sap context
* @chn_stat: Pointer to chan status info
*
* Return: channel noise floor weight
*/
static uint32_t sap_weight_channel_noise_floor(ptSapContext sap_ctx,
struct lim_channel_status
*channel_stat)
{
uint32_t noise_floor_weight;
uint8_t softap_nf_weight_cfg;
uint8_t softap_nf_weight_local;
softap_nf_weight_cfg =
ACS_WEIGHT_SOFTAP_NOISE_FLOOR_CFG
(sap_ctx->auto_channel_select_weight);
softap_nf_weight_local =
ACS_WEIGHT_CFG_TO_LOCAL(sap_ctx->auto_channel_select_weight,
softap_nf_weight_cfg);
if (channel_stat == NULL || channel_stat->channelfreq == 0) {
QDF_TRACE(QDF_MODULE_ID_SAP, QDF_TRACE_LEVEL_DEBUG,
"In %s, sanity check failed return max weight",
__func__);
return softap_nf_weight_local;
}
noise_floor_weight = (channel_stat->noise_floor == 0) ? 0 :
(ACS_WEIGHT_COMPUTE(
sap_ctx->auto_channel_select_weight,
softap_nf_weight_cfg,
channel_stat->noise_floor -
SOFTAP_MIN_NF,
SOFTAP_MAX_NF - SOFTAP_MIN_NF));
if (noise_floor_weight > softap_nf_weight_local)
noise_floor_weight = softap_nf_weight_local;
else if (noise_floor_weight < 0)
noise_floor_weight = 0;
QDF_TRACE(QDF_MODULE_ID_SAP, QDF_TRACE_LEVEL_INFO_HIGH,
"In %s, nf=%d, nfwc=%d, nfwl=%d, nfw=%d",
__func__, channel_stat->noise_floor,
softap_nf_weight_cfg, softap_nf_weight_local,
noise_floor_weight);
return noise_floor_weight;
}
/**
* sap_weight_channel_free() - compute channel free weight
* @sap_ctx: sap context
* @chn_stat: Pointer to chan status info
*
* Return: channel free weight
*/
static uint32_t sap_weight_channel_free(ptSapContext sap_ctx,
struct lim_channel_status
*channel_stat)
{
uint32_t channel_free_weight;
uint8_t softap_channel_free_weight_cfg;
uint8_t softap_channel_free_weight_local;
uint32_t rx_clear_count = 0;
uint32_t cycle_count = 0;
softap_channel_free_weight_cfg =
ACS_WEIGHT_SOFTAP_CHANNEL_FREE_CFG
(sap_ctx->auto_channel_select_weight);
softap_channel_free_weight_local =
ACS_WEIGHT_CFG_TO_LOCAL(sap_ctx->auto_channel_select_weight,
softap_channel_free_weight_cfg);
if (channel_stat == NULL || channel_stat->channelfreq == 0) {
QDF_TRACE(QDF_MODULE_ID_SAP, QDF_TRACE_LEVEL_DEBUG,
"In %s, sanity check failed return max weight",
__func__);
return softap_channel_free_weight_local;
}
rx_clear_count = channel_stat->rx_clear_count -
channel_stat->tx_frame_count -
channel_stat->rx_frame_count;
cycle_count = channel_stat->cycle_count;
/* LSH 4, otherwise it is always 0. */
channel_free_weight = (cycle_count == 0) ? 0 :
(ACS_WEIGHT_COMPUTE(
sap_ctx->auto_channel_select_weight,
softap_channel_free_weight_cfg,
((rx_clear_count << 8) +
(cycle_count >> 1))/cycle_count -
(SOFTAP_MIN_CHNFREE << 8),
(SOFTAP_MAX_CHNFREE -
SOFTAP_MIN_CHNFREE) << 8));
if (channel_free_weight > softap_channel_free_weight_local)
channel_free_weight = softap_channel_free_weight_local;
QDF_TRACE(QDF_MODULE_ID_SAP, QDF_TRACE_LEVEL_INFO_HIGH,
"In %s, rcc=%d, cc=%d, tc=%d, rc=%d, cfwc=%d, cfwl=%d, cfw=%d",
__func__, rx_clear_count, cycle_count,
channel_stat->tx_frame_count,
channel_stat->rx_frame_count,
softap_channel_free_weight_cfg,
softap_channel_free_weight_local,
channel_free_weight);
return channel_free_weight;
}
/**
* sap_weight_channel_txpwr_range() - compute channel tx power range weight
* @sap_ctx: sap context
* @chn_stat: Pointer to chan status info
*
* Return: tx power range weight
*/
static uint32_t sap_weight_channel_txpwr_range(ptSapContext sap_ctx,
struct lim_channel_status
*channel_stat)
{
uint32_t txpwr_weight_low_speed;
uint8_t softap_txpwr_range_weight_cfg;
uint8_t softap_txpwr_range_weight_local;
softap_txpwr_range_weight_cfg =
ACS_WEIGHT_SOFTAP_TX_POWER_RANGE_CFG
(sap_ctx->auto_channel_select_weight);
softap_txpwr_range_weight_local =
ACS_WEIGHT_CFG_TO_LOCAL(sap_ctx->auto_channel_select_weight,
softap_txpwr_range_weight_cfg);
if (channel_stat == NULL || channel_stat->channelfreq == 0) {
QDF_TRACE(QDF_MODULE_ID_SAP, QDF_TRACE_LEVEL_DEBUG,
"In %s, sanity check failed return max weight",
__func__);
return softap_txpwr_range_weight_local;
}
txpwr_weight_low_speed = (channel_stat->chan_tx_pwr_range == 0) ? 0 :
(ACS_WEIGHT_COMPUTE(
sap_ctx->auto_channel_select_weight,
softap_txpwr_range_weight_cfg,
SOFTAP_MAX_TXPWR -
channel_stat->chan_tx_pwr_range,
SOFTAP_MAX_TXPWR - SOFTAP_MIN_TXPWR));
if (txpwr_weight_low_speed > softap_txpwr_range_weight_local)
txpwr_weight_low_speed = softap_txpwr_range_weight_local;
QDF_TRACE(QDF_MODULE_ID_SAP, QDF_TRACE_LEVEL_INFO_HIGH,
"In %s, tpr=%d, tprwc=%d, tprwl=%d, tprw=%d",
__func__, channel_stat->chan_tx_pwr_range,
softap_txpwr_range_weight_cfg,
softap_txpwr_range_weight_local,
txpwr_weight_low_speed);
return txpwr_weight_low_speed;
}
/**
* sap_weight_channel_txpwr_tput() - compute channel tx power
* throughput weight
* @sap_ctx: sap context
* @chn_stat: Pointer to chan status info
*
* Return: tx power throughput weight
*/
static uint32_t sap_weight_channel_txpwr_tput(ptSapContext sap_ctx,
struct lim_channel_status
*channel_stat)
{
uint32_t txpwr_weight_high_speed;
uint8_t softap_txpwr_tput_weight_cfg;
uint8_t softap_txpwr_tput_weight_local;
softap_txpwr_tput_weight_cfg =
ACS_WEIGHT_SOFTAP_TX_POWER_THROUGHPUT_CFG
(sap_ctx->auto_channel_select_weight);
softap_txpwr_tput_weight_local =
ACS_WEIGHT_CFG_TO_LOCAL(sap_ctx->auto_channel_select_weight,
softap_txpwr_tput_weight_cfg);
if (channel_stat == NULL || channel_stat->channelfreq == 0) {
QDF_TRACE(QDF_MODULE_ID_SAP, QDF_TRACE_LEVEL_DEBUG,
"In %s, sanity check failed return max weight",
__func__);
return softap_txpwr_tput_weight_local;
}
txpwr_weight_high_speed = (channel_stat->chan_tx_pwr_throughput == 0)
? 0 : (ACS_WEIGHT_COMPUTE(
sap_ctx->auto_channel_select_weight,
softap_txpwr_tput_weight_cfg,
SOFTAP_MAX_TXPWR -
channel_stat->chan_tx_pwr_throughput,
SOFTAP_MAX_TXPWR - SOFTAP_MIN_TXPWR));
if (txpwr_weight_high_speed > softap_txpwr_tput_weight_local)
txpwr_weight_high_speed = softap_txpwr_tput_weight_local;
QDF_TRACE(QDF_MODULE_ID_SAP, QDF_TRACE_LEVEL_INFO_HIGH,
"In %s, tpt=%d, tptwc=%d, tptwl=%d, tptw=%d",
__func__, channel_stat->chan_tx_pwr_throughput,
softap_txpwr_tput_weight_cfg,
softap_txpwr_tput_weight_local,
txpwr_weight_high_speed);
return txpwr_weight_high_speed;
}
/**
* sap_weight_channel_status() - compute chan status weight
* @sap_ctx: sap context
* @chn_stat: Pointer to chan status info
*
* Return: chan status weight
*/
static
uint32_t sap_weight_channel_status(ptSapContext sap_ctx,
struct lim_channel_status *channel_stat)
{
return sap_weight_channel_noise_floor(sap_ctx, channel_stat) +
sap_weight_channel_free(sap_ctx, channel_stat) +
sap_weight_channel_txpwr_range(sap_ctx, channel_stat) +
sap_weight_channel_txpwr_tput(sap_ctx, channel_stat);
}
/**
* sap_check_channels_same_band() - Check if two channels belong to same band
* @ch_num1: channel number
* @ch_num2: channel number
*
* Return: true if both channels belong to same band else false
*/
static bool sap_check_channels_same_band(uint16_t ch_num1, uint16_t ch_num2)
{
if ((ch_num1 <= SIR_11B_CHANNEL_END &&
ch_num2 <= SIR_11B_CHANNEL_END) ||
(ch_num1 >= SIR_11A_CHANNEL_BEGIN &&
ch_num2 >= SIR_11A_CHANNEL_BEGIN))
return true;
return false;
}
/**
* sap_update_rssi_bsscount() - updates bss count and rssi effect.
*
* @pSpectCh: Channel Information
* @offset: Channel Offset
* @sap_24g: Channel is in 2.4G or 5G
* @spectch_start: the start of spect ch array
* @spectch_end: the end of spect ch array
*
* sap_update_rssi_bsscount updates bss count and rssi effect based
* on the channel offset.
*
* Return: None.
*/
static void sap_update_rssi_bsscount(tSapSpectChInfo *pSpectCh, int32_t offset,
bool sap_24g, tSapSpectChInfo *spectch_start,
tSapSpectChInfo *spectch_end)
{
tSapSpectChInfo *pExtSpectCh = NULL;
int32_t rssi, rsssi_effect;
pExtSpectCh = (pSpectCh + offset);
if (pExtSpectCh != NULL &&
pExtSpectCh >= spectch_start &&
pExtSpectCh < spectch_end) {
if (!sap_check_channels_same_band(pSpectCh->chNum,
pExtSpectCh->chNum))
return;
++pExtSpectCh->bssCount;
switch (offset) {
case -1:
case 1:
rsssi_effect = sap_24g ?
SAP_24GHZ_FIRST_OVERLAP_CHAN_RSSI_EFFECT_PRIMARY :
SAP_SUBBAND1_RSSI_EFFECT_PRIMARY;
break;
case -2:
case 2:
rsssi_effect = sap_24g ?
SAP_24GHZ_SEC_OVERLAP_CHAN_RSSI_EFFECT_PRIMARY :
SAP_SUBBAND2_RSSI_EFFECT_PRIMARY;
break;
case -3:
case 3:
rsssi_effect = sap_24g ?
SAP_24GHZ_THIRD_OVERLAP_CHAN_RSSI_EFFECT_PRIMARY :
SAP_SUBBAND3_RSSI_EFFECT_PRIMARY;
break;
case -4:
case 4:
rsssi_effect = sap_24g ?
SAP_24GHZ_FOURTH_OVERLAP_CHAN_RSSI_EFFECT_PRIMARY :
SAP_SUBBAND4_RSSI_EFFECT_PRIMARY;
break;
case -5:
case 5:
rsssi_effect = SAP_SUBBAND5_RSSI_EFFECT_PRIMARY;
break;
case -6:
case 6:
rsssi_effect = SAP_SUBBAND6_RSSI_EFFECT_PRIMARY;
break;
case -7:
case 7:
rsssi_effect = SAP_SUBBAND7_RSSI_EFFECT_PRIMARY;
break;
default:
rsssi_effect = 0;
break;
}
rssi = pSpectCh->rssiAgr + rsssi_effect;
if (IS_RSSI_VALID(pExtSpectCh->rssiAgr, rssi))
pExtSpectCh->rssiAgr = rssi;
if (pExtSpectCh->rssiAgr < SOFTAP_MIN_RSSI)
pExtSpectCh->rssiAgr = SOFTAP_MIN_RSSI;
}
}
/**
* sap_upd_chan_spec_params() - sap_upd_chan_spec_params
* updates channel parameters obtained from Beacon
* @pBeaconStruct Beacon strucutre populated by parse_beacon function
* @channelWidth Channel width
* @secondaryChannelOffset Secondary Channel Offset
* @vhtSupport If channel supports VHT
* @centerFreq Central frequency for the given channel.
*
* sap_upd_chan_spec_params updates the spectrum channels based on the
* pBeaconStruct obtained from Beacon IE
*
* Return: NA.
*/
static void sap_upd_chan_spec_params(tSirProbeRespBeacon *pBeaconStruct,
uint16_t *channelWidth,
uint16_t *secondaryChannelOffset,
uint16_t *vhtSupport,
uint16_t *centerFreq,
uint16_t *centerFreq_2)
{
if (NULL == pBeaconStruct) {
QDF_TRACE(QDF_MODULE_ID_SAP, QDF_TRACE_LEVEL_ERROR,
FL("pBeaconStruct is NULL"));
return;
}
if (pBeaconStruct->HTCaps.present && pBeaconStruct->HTInfo.present) {
*channelWidth = pBeaconStruct->HTCaps.supportedChannelWidthSet;
*secondaryChannelOffset =
pBeaconStruct->HTInfo.secondaryChannelOffset;
if (!pBeaconStruct->VHTOperation.present)
return;
*vhtSupport = pBeaconStruct->VHTOperation.present;
if (pBeaconStruct->VHTOperation.chanWidth) {
*centerFreq =
pBeaconStruct->VHTOperation.chanCenterFreqSeg1;
*centerFreq_2 =
pBeaconStruct->VHTOperation.chanCenterFreqSeg2;
/*
* LHS follows tSirMacHTChannelWidth, while RHS follows
* WNI_CFG_VHT_CHANNEL_WIDTH_X format hence following
* adjustment
*/
*channelWidth =
pBeaconStruct->VHTOperation.chanWidth + 1;
}
}
}
/**
* sap_update_rssi_bsscount_vht_5G() - updates bss count and rssi effect.
*
* @spect_ch: Channel Information
* @offset: Channel Offset
* @num_ch: no.of channels
* @spectch_start: the start of spect ch array
* @spectch_end: the end of spect ch array
*
* sap_update_rssi_bsscount_vht_5G updates bss count and rssi effect based
* on the channel offset.
*
* Return: None.
*/
static void sap_update_rssi_bsscount_vht_5G(tSapSpectChInfo *spect_ch,
int32_t offset,
uint16_t num_ch,
tSapSpectChInfo *spectch_start,
tSapSpectChInfo *spectch_end)
{
int32_t ch_offset;
uint16_t i, cnt;
if (!offset)
return;
if (offset > 0)
cnt = num_ch;
else
cnt = num_ch + 1;
for (i = 0; i < cnt; i++) {
ch_offset = offset + i;
if (ch_offset == 0)
continue;
sap_update_rssi_bsscount(spect_ch, ch_offset, false,
spectch_start, spectch_end);
}
}
/**
* sap_interference_rssi_count_5G() - sap_interference_rssi_count
* considers the Adjacent channel rssi and
* data count(here number of BSS observed)
* @spect_ch: Channel Information
* @chan_width: Channel width parsed from beacon IE
* @sec_chan_offset: Secondary Channel Offset
* @center_freq: Central frequency for the given channel.
* @channel_id: channel_id
* @spectch_start: the start of spect ch array
* @spectch_end: the end of spect ch array
*
* sap_interference_rssi_count_5G considers the Adjacent channel rssi
* and data count(here number of BSS observed)
*
* Return: NA.
*/
static void sap_interference_rssi_count_5G(tSapSpectChInfo *spect_ch,
uint16_t chan_width,
uint16_t sec_chan_offset,
uint16_t center_freq,
uint16_t center_freq_2,
uint8_t channel_id,
tSapSpectChInfo *spectch_start,
tSapSpectChInfo *spectch_end)
{
uint16_t num_ch;
int32_t offset = 0;
if (NULL == spect_ch) {
QDF_TRACE(QDF_MODULE_ID_SAP, QDF_TRACE_LEVEL_ERROR,
FL("spect_ch is NULL"));
return;
}
/* Updating the received ChannelWidth */
if (spect_ch->channelWidth != chan_width)
spect_ch->channelWidth = chan_width;
/* If received ChannelWidth is other than HT20,
* we need to update the extension channel Params as well
* chan_width == 0, HT20
* chan_width == 1, HT40
* chan_width == 2, VHT80
* chan_width == 3, VHT160
*/
switch (spect_ch->channelWidth) {
case eHT_CHANNEL_WIDTH_40MHZ: /* HT40 */
switch (sec_chan_offset) {
/* Above the Primary Channel */
case PHY_DOUBLE_CHANNEL_LOW_PRIMARY:
sap_update_rssi_bsscount(spect_ch, 1, false,
spectch_start, spectch_end);
return;
/* Below the Primary channel */
case PHY_DOUBLE_CHANNEL_HIGH_PRIMARY:
sap_update_rssi_bsscount(spect_ch, -1, false,
spectch_start, spectch_end);
return;
}
return;
case eHT_CHANNEL_WIDTH_80MHZ: /* VHT80 */
num_ch = 3;
if ((center_freq - channel_id) == 6) {
offset = 1;
} else if ((center_freq - channel_id) == 2) {
offset = -1;
} else if ((center_freq - channel_id) == -2) {
offset = -2;
} else if ((center_freq - channel_id) == -6) {
offset = -3;
}
break;
case eHT_CHANNEL_WIDTH_160MHZ: /* VHT160 */
num_ch = 7;
if ((center_freq - channel_id) == 14)
offset = 1;
else if ((center_freq - channel_id) == 10)
offset = -1;
else if ((center_freq - channel_id) == 6)
offset = -2;
else if ((center_freq - channel_id) == 2)
offset = -3;
else if ((center_freq - channel_id) == -2)
offset = -4;
else if ((center_freq - channel_id) == -6)
offset = -5;
else if ((center_freq - channel_id) == -10)
offset = -6;
else if ((center_freq - channel_id) == -14)
offset = -7;
break;
default:
return;
}
sap_update_rssi_bsscount_vht_5G(spect_ch, offset, num_ch,
spectch_start, spectch_end);
}
/**
* sap_interference_rssi_count() - sap_interference_rssi_count
* considers the Adjacent channel rssi
* and data count(here number of BSS observed)
* @spect_ch Channel Information
* @spectch_start: the start of spect ch array
* @spectch_end: the end of spect ch array
*
* sap_interference_rssi_count considers the Adjacent channel rssi
* and data count(here number of BSS observed)
*
* Return: None.
*/
static void sap_interference_rssi_count(tSapSpectChInfo *spect_ch,
tSapSpectChInfo *spectch_start,
tSapSpectChInfo *spectch_end)
{
if (NULL == spect_ch) {
QDF_TRACE(QDF_MODULE_ID_SAP, QDF_TRACE_LEVEL_ERROR,
"%s: spect_ch is NULL", __func__);
return;
}
switch (spect_ch->chNum) {
case CHANNEL_1:
sap_update_rssi_bsscount(spect_ch, 1, true,
spectch_start, spectch_end);
sap_update_rssi_bsscount(spect_ch, 2, true,
spectch_start, spectch_end);
sap_update_rssi_bsscount(spect_ch, 3, true,
spectch_start, spectch_end);
sap_update_rssi_bsscount(spect_ch, 4, true,
spectch_start, spectch_end);
break;
case CHANNEL_2:
sap_update_rssi_bsscount(spect_ch, -1, true,
spectch_start, spectch_end);
sap_update_rssi_bsscount(spect_ch, 1, true,
spectch_start, spectch_end);
sap_update_rssi_bsscount(spect_ch, 2, true,
spectch_start, spectch_end);
sap_update_rssi_bsscount(spect_ch, 3, true,
spectch_start, spectch_end);
sap_update_rssi_bsscount(spect_ch, 4, true,
spectch_start, spectch_end);
break;
case CHANNEL_3:
sap_update_rssi_bsscount(spect_ch, -2, true,
spectch_start, spectch_end);
sap_update_rssi_bsscount(spect_ch, -1, true,
spectch_start, spectch_end);
sap_update_rssi_bsscount(spect_ch, 1, true,
spectch_start, spectch_end);
sap_update_rssi_bsscount(spect_ch, 2, true,
spectch_start, spectch_end);
sap_update_rssi_bsscount(spect_ch, 3, true,
spectch_start, spectch_end);
sap_update_rssi_bsscount(spect_ch, 4, true,
spectch_start, spectch_end);
break;
case CHANNEL_4:
sap_update_rssi_bsscount(spect_ch, -3, true,
spectch_start, spectch_end);
sap_update_rssi_bsscount(spect_ch, -2, true,
spectch_start, spectch_end);
sap_update_rssi_bsscount(spect_ch, -1, true,
spectch_start, spectch_end);
sap_update_rssi_bsscount(spect_ch, 1, true,
spectch_start, spectch_end);
sap_update_rssi_bsscount(spect_ch, 2, true,
spectch_start, spectch_end);
sap_update_rssi_bsscount(spect_ch, 3, true,
spectch_start, spectch_end);
sap_update_rssi_bsscount(spect_ch, 4, true,
spectch_start, spectch_end);
break;
case CHANNEL_5:
case CHANNEL_6:
case CHANNEL_7:
case CHANNEL_8:
case CHANNEL_9:
case CHANNEL_10:
sap_update_rssi_bsscount(spect_ch, -4, true,
spectch_start, spectch_end);
sap_update_rssi_bsscount(spect_ch, -3, true,
spectch_start, spectch_end);
sap_update_rssi_bsscount(spect_ch, -2, true,
spectch_start, spectch_end);
sap_update_rssi_bsscount(spect_ch, -1, true,
spectch_start, spectch_end);
sap_update_rssi_bsscount(spect_ch, 1, true,
spectch_start, spectch_end);
sap_update_rssi_bsscount(spect_ch, 2, true,
spectch_start, spectch_end);
sap_update_rssi_bsscount(spect_ch, 3, true,
spectch_start, spectch_end);
sap_update_rssi_bsscount(spect_ch, 4, true,
spectch_start, spectch_end);
break;
case CHANNEL_11:
sap_update_rssi_bsscount(spect_ch, -4, true,
spectch_start, spectch_end);
sap_update_rssi_bsscount(spect_ch, -3, true,
spectch_start, spectch_end);
sap_update_rssi_bsscount(spect_ch, -2, true,
spectch_start, spectch_end);
sap_update_rssi_bsscount(spect_ch, -1, true,
spectch_start, spectch_end);
sap_update_rssi_bsscount(spect_ch, 1, true,
spectch_start, spectch_end);
sap_update_rssi_bsscount(spect_ch, 2, true,
spectch_start, spectch_end);
sap_update_rssi_bsscount(spect_ch, 3, true,
spectch_start, spectch_end);
break;
case CHANNEL_12:
sap_update_rssi_bsscount(spect_ch, -4, true,
spectch_start, spectch_end);
sap_update_rssi_bsscount(spect_ch, -3, true,
spectch_start, spectch_end);
sap_update_rssi_bsscount(spect_ch, -2, true,
spectch_start, spectch_end);
sap_update_rssi_bsscount(spect_ch, -1, true,
spectch_start, spectch_end);
sap_update_rssi_bsscount(spect_ch, 1, true,
spectch_start, spectch_end);
sap_update_rssi_bsscount(spect_ch, 2, true,
spectch_start, spectch_end);
break;
case CHANNEL_13:
sap_update_rssi_bsscount(spect_ch, -4, true,
spectch_start, spectch_end);
sap_update_rssi_bsscount(spect_ch, -3, true,
spectch_start, spectch_end);
sap_update_rssi_bsscount(spect_ch, -2, true,
spectch_start, spectch_end);
sap_update_rssi_bsscount(spect_ch, -1, true,
spectch_start, spectch_end);
sap_update_rssi_bsscount(spect_ch, 1, true,
spectch_start, spectch_end);
break;
case CHANNEL_14:
sap_update_rssi_bsscount(spect_ch, -4, true,
spectch_start, spectch_end);
sap_update_rssi_bsscount(spect_ch, -3, true,
spectch_start, spectch_end);
sap_update_rssi_bsscount(spect_ch, -2, true,
spectch_start, spectch_end);
sap_update_rssi_bsscount(spect_ch, -1, true,
spectch_start, spectch_end);
break;
default:
break;
}
}
/**
* ch_in_pcl() - Is channel in the Preferred Channel List (PCL)
* @sap_ctx: SAP context which contains the current PCL
* @channel: Input channel number to be checked
*
* Check if a channel is in the preferred channel list
*
* Return:
* true: channel is in PCL,
* false: channel is not in PCL
*/
static bool ch_in_pcl(ptSapContext sap_ctx, uint8_t channel)
{
uint32_t i;
for (i = 0; i < sap_ctx->acs_cfg->pcl_ch_count; i++) {
if (channel == sap_ctx->acs_cfg->pcl_channels[i])
return true;
}
return false;
}
/**
* sap_compute_spect_weight() - Compute spectrum weight
* @pSpectInfoParams: Pointer to the tSpectInfoParams structure
* @halHandle: Pointer to HAL handle
* @pResult: Pointer to tScanResultHandle
* @sap_ctx: Context of the SAP
*
* 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
*/
static void sap_compute_spect_weight(tSapChSelSpectInfo *pSpectInfoParams,
tHalHandle halHandle,
tScanResultHandle pResult,
ptSapContext sap_ctx)
{
int8_t rssi = 0;
uint8_t chn_num = 0;
uint8_t channel_id = 0;
tCsrScanResultInfo *pScanResult;
tSapSpectChInfo *pSpectCh = pSpectInfoParams->pSpectCh;
uint32_t operatingBand;
uint16_t channelWidth;
uint16_t secondaryChannelOffset;
uint16_t centerFreq;
uint16_t centerFreq_2 = 0;
uint16_t vhtSupport;
uint32_t ieLen = 0;
tSirProbeRespBeacon *pBeaconStruct;
tpAniSirGlobal pMac = (tpAniSirGlobal) halHandle;
tSapSpectChInfo *spectch_start = pSpectInfoParams->pSpectCh;
tSapSpectChInfo *spectch_end = pSpectInfoParams->pSpectCh +
pSpectInfoParams->numSpectChans;
pBeaconStruct = qdf_mem_malloc(sizeof(tSirProbeRespBeacon));
if (NULL == pBeaconStruct) {
QDF_TRACE(QDF_MODULE_ID_SAP, QDF_TRACE_LEVEL_INFO_HIGH,
"Unable to allocate memory in sap_compute_spect_weight");
return;
}
QDF_TRACE(QDF_MODULE_ID_SAP, QDF_TRACE_LEVEL_INFO_HIGH,
"In %s, Computing spectral weight", __func__);
/**
* Soft AP specific channel weight calculation using DFS formula
*/
SET_ACS_BAND(operatingBand, sap_ctx);
pScanResult = sme_scan_result_get_first(halHandle, pResult);
while (pScanResult) {
pSpectCh = pSpectInfoParams->pSpectCh;
/* Defining the default values, so that any value will hold the default values */
channelWidth = eHT_CHANNEL_WIDTH_20MHZ;
secondaryChannelOffset = PHY_SINGLE_CHANNEL_CENTERED;
vhtSupport = 0;
centerFreq = 0;
ieLen = GET_IE_LEN_IN_BSS(
pScanResult->BssDescriptor.length);
qdf_mem_set((uint8_t *) pBeaconStruct,
sizeof(tSirProbeRespBeacon), 0);
if ((sir_parse_beacon_ie
(pMac, pBeaconStruct, (uint8_t *)
(pScanResult->BssDescriptor.ieFields),
ieLen)) == eSIR_SUCCESS)
sap_upd_chan_spec_params(
pBeaconStruct,
&channelWidth,
&secondaryChannelOffset,
&vhtSupport, &centerFreq,
&centerFreq_2);
/* 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 (pSpectCh && (channel_id == pSpectCh->chNum)) {
if (pSpectCh->rssiAgr <
pScanResult->BssDescriptor.rssi)
pSpectCh->rssiAgr =
pScanResult->BssDescriptor.rssi;
++pSpectCh->bssCount; /* Increment the count of BSS */
/*
* Connsidering the Extension Channel
* only in a channels
*/
switch (operatingBand) {
case eCSR_DOT11_MODE_11a:
sap_interference_rssi_count_5G(
pSpectCh, channelWidth,
secondaryChannelOffset,
centerFreq,
centerFreq_2,
channel_id,
spectch_start,
spectch_end);
break;
case eCSR_DOT11_MODE_11g:
sap_interference_rssi_count(pSpectCh,
spectch_start, spectch_end);
break;
case eCSR_DOT11_MODE_abg:
if (pSpectCh->chNum >=
SIR_11A_CHANNEL_BEGIN)
sap_interference_rssi_count_5G(
pSpectCh, channelWidth,
secondaryChannelOffset,
centerFreq,
centerFreq_2,
channel_id,
spectch_start,
spectch_end);
else
sap_interference_rssi_count(
pSpectCh,
spectch_start,
spectch_end);
break;
}
QDF_TRACE(QDF_MODULE_ID_SAP,
QDF_TRACE_LEVEL_INFO_HIGH,
"In %s, bssdes.ch_self=%d, bssdes.ch_ID=%d, bssdes.rssi=%d, SpectCh.bssCount=%d, pScanResult=%pK, ChannelWidth %d, secondaryChanOffset %d, center frequency %d",
__func__,
pScanResult->BssDescriptor.
channelIdSelf,
pScanResult->BssDescriptor.channelId,
pScanResult->BssDescriptor.rssi,
pSpectCh->bssCount, pScanResult,
pSpectCh->channelWidth,
secondaryChannelOffset, centerFreq);
pSpectCh++;
break;
} else {
pSpectCh++;
}
}
pScanResult = sme_scan_result_get_next(halHandle, pResult);
}
/* Calculate the weights for all channels in the spectrum pSpectCh */
pSpectCh = pSpectInfoParams->pSpectCh;
QDF_TRACE(QDF_MODULE_ID_SAP, QDF_TRACE_LEVEL_INFO_HIGH,
"In %s, Spectrum Channels Weight", __func__);
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 = (int8_t) pSpectCh->rssiAgr;
if (ch_in_pcl(sap_ctx, chn_num))
rssi -= PCL_RSSI_DISCOUNT;
if (pSpectCh->weight == SAP_ACS_WEIGHT_MAX)
goto debug_info;
pSpectCh->weight =
SAPDFS_NORMALISE_1000 *
(sapweight_rssi_count(sap_ctx, rssi,
pSpectCh->bssCount) + sap_weight_channel_status(
sap_ctx, sap_get_channel_status(pMac,
pSpectCh->chNum)));
if (pSpectCh->weight > SAP_ACS_WEIGHT_MAX)
pSpectCh->weight = SAP_ACS_WEIGHT_MAX;
pSpectCh->weight_copy = pSpectCh->weight;
debug_info:
/* ------ Debug Info ------ */
QDF_TRACE(QDF_MODULE_ID_SAP, QDF_TRACE_LEVEL_INFO_HIGH,
"In %s, Chan=%d Weight= %d rssiAgr=%d bssCount=%d",
__func__, pSpectCh->chNum, pSpectCh->weight,
pSpectCh->rssiAgr, pSpectCh->bssCount);
/* ------ Debug Info ------ */
pSpectCh++;
}
sap_clear_channel_status(pMac);
qdf_mem_free(pBeaconStruct);
}
/*==========================================================================
FUNCTION sap_chan_sel_exit
DESCRIPTION
Exit function for free out the allocated memory, to be called
at the end of the dfsSelectChannel function
DEPENDENCIES
NA.
PARAMETERS
IN
pSpectInfoParams : Pointer to the tSapChSelSpectInfo structure
RETURN VALUE
void : NULL
SIDE EFFECTS
============================================================================*/
static void sap_chan_sel_exit(tSapChSelSpectInfo *pSpectInfoParams)
{
/* Free all the allocated memory */
qdf_mem_free(pSpectInfoParams->pSpectCh);
}
/*==========================================================================
FUNCTION sap_sort_chl_weight
DESCRIPTION
Funtion to sort the channels with the least weight first for 20MHz channels
DEPENDENCIES
NA.
PARAMETERS
IN
pSpectInfoParams : Pointer to the tSapChSelSpectInfo structure
RETURN VALUE
void : NULL
SIDE EFFECTS
============================================================================*/
static void sap_sort_chl_weight(tSapChSelSpectInfo *pSpectInfoParams)
{
tSapSpectChInfo temp;
tSapSpectChInfo *pSpectCh = NULL;
uint32_t i = 0, j = 0, minWeightIndex = 0;
pSpectCh = pSpectInfoParams->pSpectCh;
for (i = 0; i < pSpectInfoParams->numSpectChans; i++) {
minWeightIndex = i;
for (j = i + 1; j < pSpectInfoParams->numSpectChans; j++) {
if (pSpectCh[j].weight <
pSpectCh[minWeightIndex].weight) {
minWeightIndex = j;
} else if (pSpectCh[j].weight ==
pSpectCh[minWeightIndex].weight) {
if (pSpectCh[j].bssCount <
pSpectCh[minWeightIndex].bssCount)
minWeightIndex = j;
}
}
if (minWeightIndex != i) {
qdf_mem_copy(&temp, &pSpectCh[minWeightIndex],
sizeof(*pSpectCh));
qdf_mem_copy(&pSpectCh[minWeightIndex], &pSpectCh[i],
sizeof(*pSpectCh));
qdf_mem_copy(&pSpectCh[i], &temp, sizeof(*pSpectCh));
}
}
}
/**
* set_ht80_chl_bit() - to set availabe channel to ht80 channel bitmap
* @channel_bitmap: Pointer to the chan_bonding_bitmap structure
* @spect_info_params: Pointer to the tSapChSelSpectInfo structure
*
* Return: none
*/
static void set_ht80_chl_bit(chan_bonding_bitmap *channel_bitmap,
tSapChSelSpectInfo *spec_info_params)
{
uint8_t i, j;
tSapSpectChInfo *spec_info;
int start_channel = 0;
channel_bitmap->chanBondingSet[0].startChannel =
acs_ht80_channels[0].chStartNum;
channel_bitmap->chanBondingSet[1].startChannel =
acs_ht80_channels[1].chStartNum;
channel_bitmap->chanBondingSet[2].startChannel =
acs_ht80_channels[2].chStartNum;
channel_bitmap->chanBondingSet[3].startChannel =
acs_ht80_channels[3].chStartNum;
channel_bitmap->chanBondingSet[4].startChannel =
acs_ht80_channels[4].chStartNum;
channel_bitmap->chanBondingSet[5].startChannel =
acs_ht80_channels[5].chStartNum;
spec_info = spec_info_params->pSpectCh;
for (j = 0; j < spec_info_params->numSpectChans; j++) {
for (i = 0; i < MAX_80MHZ_BANDS; i++) {
start_channel =
channel_bitmap->chanBondingSet[i].startChannel;
if (spec_info[j].chNum >= start_channel &&
(spec_info[j].chNum <=
start_channel + 12)) {
channel_bitmap->chanBondingSet[i].channelMap |=
1 << ((spec_info[j].chNum -
start_channel)/4);
break;
}
}
}
}
/**
* sap_sort_chl_weight_ht80() - to sort the channels with the least weight
* @pSpectInfoParams: Pointer to the tSapChSelSpectInfo structure
*
* Funtion to sort the channels with the least weight first for HT80 channels
*
* Return: none
*/
static void sap_sort_chl_weight_ht80(tSapChSelSpectInfo *pSpectInfoParams)
{
uint8_t i, j, n;
tSapSpectChInfo *pSpectInfo;
uint8_t minIdx;
int start_channel = 0;
chan_bonding_bitmap *channel_bitmap;
channel_bitmap = qdf_mem_malloc(sizeof(chan_bonding_bitmap));
if (NULL == channel_bitmap) {
QDF_TRACE(QDF_MODULE_ID_SAP, QDF_TRACE_LEVEL_INFO_HIGH,
"%s: Failed to allocate memory", __func__);
return;
}
pSpectInfo = pSpectInfoParams->pSpectCh;
/* for each HT80 channel, calculate the combined weight of the
four 20MHz weight */
for (i = 0; i < ARRAY_SIZE(acs_ht80_channels); i++) {
for (j = 0; j < pSpectInfoParams->numSpectChans; j++) {
if (pSpectInfo[j].chNum ==
acs_ht80_channels[i].chStartNum)
break;
}
if (j == pSpectInfoParams->numSpectChans)
continue;
if (!(((pSpectInfo[j].chNum + 4) == pSpectInfo[j + 1].chNum) &&
((pSpectInfo[j].chNum + 8) ==
pSpectInfo[j + 2].chNum) &&
((pSpectInfo[j].chNum + 12) ==
pSpectInfo[j + 3].chNum))) {
/*
* some channels does not exist in pSectInfo array,
* skip this channel and those in the same HT80 width
*/
pSpectInfo[j].weight = SAP_ACS_WEIGHT_MAX * 4;
if ((pSpectInfo[j].chNum + 4) ==
pSpectInfo[j + 1].chNum)
pSpectInfo[j + 1].weight =
SAP_ACS_WEIGHT_MAX * 4;
if ((pSpectInfo[j].chNum + 8) ==
pSpectInfo[j + 2].chNum)
pSpectInfo[j + 2].weight =
SAP_ACS_WEIGHT_MAX * 4;
if ((pSpectInfo[j].chNum + 12) ==
pSpectInfo[j + 3].chNum)
pSpectInfo[j + 3].weight =
SAP_ACS_WEIGHT_MAX * 4;
continue;
}
/*found the channel, add the 4 adjacent channels' weight */
acs_ht80_channels[i].weight = pSpectInfo[j].weight +
pSpectInfo[j + 1].weight + pSpectInfo[j + 2].weight +
pSpectInfo[j + 3].weight;
/* find best channel among 4 channels as the primary channel */
if ((pSpectInfo[j].weight + pSpectInfo[j + 1].weight) <
(pSpectInfo[j + 2].weight + pSpectInfo[j + 3].weight)) {
/* lower 2 channels are better choice */
if (pSpectInfo[j].weight < pSpectInfo[j + 1].weight)
minIdx = 0;
else
minIdx = 1;
} else if (pSpectInfo[j + 2].weight <=
pSpectInfo[j + 3].weight) {
/* upper 2 channels are better choice */
minIdx = 2;
} else {
minIdx = 3;
}
/*
* set all 4 channels to max value first, then reset the
* best channel as the selected primary channel, update its
* weightage with the combined weight value
*/
for (n = 0; n < 4; n++)
pSpectInfo[j + n].weight = SAP_ACS_WEIGHT_MAX * 4;
pSpectInfo[j + minIdx].weight = acs_ht80_channels[i].weight;
}
/*
* mark the weight of the channel that can't satisfy 80MHZ
* as max value, so that it will be sorted to the bottom
*/
set_ht80_chl_bit(channel_bitmap, pSpectInfoParams);
for (j = 0; j < pSpectInfoParams->numSpectChans; j++) {
for (i = 0; i < MAX_80MHZ_BANDS; i++) {
start_channel =
channel_bitmap->chanBondingSet[i].startChannel;
if (pSpectInfo[j].chNum >= start_channel &&
(pSpectInfo[j].chNum <=
start_channel + 12) &&
channel_bitmap->chanBondingSet[i].channelMap !=
SAP_80MHZ_MASK)
pSpectInfo[j].weight = SAP_ACS_WEIGHT_MAX * 4;
}
}
/*
* Assign max weight(SAP_ACS_WEIGHT_MAX * 4) to 2.4 Ghz channels
* and channel 165 as they cannot be part of a 80Mhz channel bonding.
*/
pSpectInfo = pSpectInfoParams->pSpectCh;
for (j = 0; j < pSpectInfoParams->numSpectChans; j++) {
if ((pSpectInfo[j].chNum >= CDS_CHANNEL_NUM(CHAN_ENUM_1) &&
pSpectInfo[j].chNum <= CDS_CHANNEL_NUM(CHAN_ENUM_14)) ||
(CHANNEL_165 == pSpectInfo[j].chNum))
pSpectInfo[j].weight = SAP_ACS_WEIGHT_MAX * 4;
}
sap_sort_chl_weight(pSpectInfoParams);
pSpectInfo = pSpectInfoParams->pSpectCh;
for (j = 0; j < (pSpectInfoParams->numSpectChans); j++) {
QDF_TRACE(QDF_MODULE_ID_SAP, QDF_TRACE_LEVEL_INFO_HIGH,
FL("Channel=%d Weight= %d rssi=%d bssCount=%d"),
pSpectInfo->chNum, pSpectInfo->weight,
pSpectInfo->rssiAgr, pSpectInfo->bssCount);
pSpectInfo++;
}
qdf_mem_free(channel_bitmap);
}
/**
* sap_sort_chl_weight_vht160() - to sort the channels with the least weight
* @pSpectInfoParams: Pointer to the tSapChSelSpectInfo structure
*
* Funtion to sort the channels with the least weight first for VHT160 channels
*
* Return: none
*/
static void sap_sort_chl_weight_vht160(tSapChSelSpectInfo *pSpectInfoParams)
{
uint8_t i, j, n, idx;
tSapSpectChInfo *pSpectInfo;
uint8_t minIdx;
pSpectInfo = pSpectInfoParams->pSpectCh;
/* for each VHT160 channel, calculate the combined weight of the
8 20MHz weight */
for (i = 0; i < ARRAY_SIZE(acs_vht160_channels); i++) {
for (j = 0; j < pSpectInfoParams->numSpectChans; j++) {
if (pSpectInfo[j].chNum ==
acs_vht160_channels[i].chStartNum)
break;
}
if (j == pSpectInfoParams->numSpectChans)
continue;
if (!(((pSpectInfo[j].chNum + 4) == pSpectInfo[j + 1].chNum) &&
((pSpectInfo[j].chNum + 8) ==
pSpectInfo[j + 2].chNum) &&
((pSpectInfo[j].chNum + 12) ==
pSpectInfo[j + 3].chNum) &&
((pSpectInfo[j].chNum + 16) ==
pSpectInfo[j + 4].chNum) &&
((pSpectInfo[j].chNum + 20) ==
pSpectInfo[j + 5].chNum) &&
((pSpectInfo[j].chNum + 24) ==
pSpectInfo[j + 6].chNum) &&
((pSpectInfo[j].chNum + 28) ==
pSpectInfo[j + 7].chNum))) {
/*
* some channels does not exist in pSectInfo array,
* skip this channel and those in the same VHT160 width
*/
pSpectInfo[j].weight = SAP_ACS_WEIGHT_MAX * 8;
if ((pSpectInfo[j].chNum + 4) ==
pSpectInfo[j + 1].chNum)
pSpectInfo[j + 1].weight =
SAP_ACS_WEIGHT_MAX * 8;
if ((pSpectInfo[j].chNum + 8) ==
pSpectInfo[j + 2].chNum)
pSpectInfo[j + 2].weight =
SAP_ACS_WEIGHT_MAX * 8;
if ((pSpectInfo[j].chNum + 12) ==
pSpectInfo[j + 3].chNum)
pSpectInfo[j + 3].weight =
SAP_ACS_WEIGHT_MAX * 8;
if ((pSpectInfo[j].chNum + 16) ==
pSpectInfo[j + 4].chNum)
pSpectInfo[j + 4].weight =
SAP_ACS_WEIGHT_MAX * 8;
if ((pSpectInfo[j].chNum + 20) ==
pSpectInfo[j + 5].chNum)
pSpectInfo[j + 5].weight =
SAP_ACS_WEIGHT_MAX * 8;
if ((pSpectInfo[j].chNum + 24) ==
pSpectInfo[j + 6].chNum)
pSpectInfo[j + 6].weight =
SAP_ACS_WEIGHT_MAX * 8;
if ((pSpectInfo[j].chNum + 28) ==
pSpectInfo[j + 7].chNum)
pSpectInfo[j + 7].weight =
SAP_ACS_WEIGHT_MAX * 8;
continue;
}
/*found the channel, add the 7 adjacent channels' weight */
acs_vht160_channels[i].weight = pSpectInfo[j].weight +
pSpectInfo[j + 1].weight + pSpectInfo[j + 2].weight +
pSpectInfo[j + 3].weight + pSpectInfo[j + 4].weight +
pSpectInfo[j + 5].weight + pSpectInfo[j + 6].weight +
pSpectInfo[j + 7].weight;
/* find best channel among 8 channels as the primary channel */
if ((pSpectInfo[j].weight + pSpectInfo[j + 1].weight +
pSpectInfo[j + 2].weight + pSpectInfo[j + 3].weight) >
(pSpectInfo[j + 4].weight + pSpectInfo[j + 5].weight +
pSpectInfo[j + 6].weight + pSpectInfo[j + 7].weight))
idx = 4;
else
idx = 0;
/* find best channel among 4 channels as the primary channel */
if ((pSpectInfo[j + idx].weight +
pSpectInfo[j + idx + 1].weight) <
(pSpectInfo[j + idx + 2].weight +
pSpectInfo[j + idx + 3].weight)) {
/* lower 2 channels are better choice */
if (pSpectInfo[j + idx].weight <
pSpectInfo[j + idx + 1].weight)
minIdx = 0 + idx;
else
minIdx = 1 + idx;
} else if (pSpectInfo[j + idx + 2].weight <=
pSpectInfo[j + idx + 3].weight) {
/* upper 2 channels are better choice */
minIdx = 2 + idx;
} else {
minIdx = 3 + idx;
}
/*
* set all 8 channels to max value first, then reset the
* best channel as the selected primary channel, update its
* weightage with the combined weight value
*/
for (n = 0; n < 8; n++)
pSpectInfo[j + n].weight = SAP_ACS_WEIGHT_MAX * 8;
pSpectInfo[j + minIdx].weight = acs_vht160_channels[i].weight;
}
/*
* Assign max weight(SAP_ACS_WEIGHT_MAX * 8) to 2.4 Ghz channels
* and channel 132-165 as they cannot be part of a 160Mhz channel
* bonding.
*/
pSpectInfo = pSpectInfoParams->pSpectCh;
for (j = 0; j < pSpectInfoParams->numSpectChans; j++) {
if ((pSpectInfo[j].chNum >= CDS_CHANNEL_NUM(CHAN_ENUM_1) &&
pSpectInfo[j].chNum <= CDS_CHANNEL_NUM(CHAN_ENUM_14)) ||
(pSpectInfo[j].chNum >= CDS_CHANNEL_NUM(CHAN_ENUM_132) &&
pSpectInfo[j].chNum <= CDS_CHANNEL_NUM(CHAN_ENUM_165)))
pSpectInfo[j].weight = SAP_ACS_WEIGHT_MAX * 8;
}
sap_sort_chl_weight(pSpectInfoParams);
pSpectInfo = pSpectInfoParams->pSpectCh;
for (j = 0; j < (pSpectInfoParams->numSpectChans); j++) {
QDF_TRACE(QDF_MODULE_ID_SAP, QDF_TRACE_LEVEL_INFO_HIGH,
FL("Channel=%d Weight= %d rssi=%d bssCount=%d"),
pSpectInfo->chNum, pSpectInfo->weight,
pSpectInfo->rssiAgr, pSpectInfo->bssCount);
pSpectInfo++;
}
}
/**
* sap_allocate_max_weight_ht40_24_g() - allocate max weight for 40Mhz
* to all 2.4Ghz channels
* @spect_info_params: Pointer to the tSapChSelSpectInfo structure
*
* Return: none
*/
static void sap_allocate_max_weight_ht40_24_g(
tSapChSelSpectInfo *spect_info_params)
{
tSapSpectChInfo *spect_info;
uint8_t j;
/*
* Assign max weight for 40Mhz (SAP_ACS_WEIGHT_MAX * 2) to all
* 2.4 Ghz channels
*/
spect_info = spect_info_params->pSpectCh;
for (j = 0; j < spect_info_params->numSpectChans; j++) {
if ((spect_info[j].chNum >= CDS_CHANNEL_NUM(CHAN_ENUM_1) &&
spect_info[j].chNum <= CDS_CHANNEL_NUM(CHAN_ENUM_14)))
spect_info[j].weight = SAP_ACS_WEIGHT_MAX * 2;
}
}
/**
* sap_allocate_max_weight_ht40_5_g() - allocate max weight for 40Mhz
* to all 5Ghz channels
* @spect_info_params: Pointer to the tSapChSelSpectInfo structure
*
* Return: none
*/
static void sap_allocate_max_weight_ht40_5_g(
tSapChSelSpectInfo *spect_info_params)
{
tSapSpectChInfo *spect_info;
uint8_t j;
/*
* Assign max weight for 40Mhz (SAP_ACS_WEIGHT_MAX * 2) to all
* 5 Ghz channels
*/
spect_info = spect_info_params->pSpectCh;
for (j = 0; j < spect_info_params->numSpectChans; j++) {
if ((spect_info[j].chNum >= CDS_CHANNEL_NUM(CHAN_ENUM_36) &&
spect_info[j].chNum <= CDS_CHANNEL_NUM(CHAN_ENUM_165)))
spect_info[j].weight = SAP_ACS_WEIGHT_MAX * 2;
}
}
/**
* sap_sort_chl_weight_ht40_24_g() - to sort channel with the least weight
* @pSpectInfoParams: Pointer to the tSapChSelSpectInfo structure
*
* Funtion to sort the channels with the least weight first for HT40 channels
*
* Return: none
*/
static void sap_sort_chl_weight_ht40_24_g(tSapChSelSpectInfo *pSpectInfoParams)
{
uint8_t i, j;
tSapSpectChInfo *pSpectInfo;
uint32_t tmpWeight1, tmpWeight2;
uint32_t ht40plus2gendch = 0;
pSpectInfo = pSpectInfoParams->pSpectCh;
/*
* for each HT40 channel, calculate the combined weight of the
* two 20MHz weight
*/
for (i = 0; i < ARRAY_SIZE(acs_ht40_channels24_g); i++) {
for (j = 0; j < pSpectInfoParams->numSpectChans; j++) {
if (pSpectInfo[j].chNum ==
acs_ht40_channels24_g[i].chStartNum)
break;
}
if (j == pSpectInfoParams->numSpectChans)
continue;
if (!((pSpectInfo[j].chNum + 4) == pSpectInfo[j + 4].chNum)) {
pSpectInfo[j].weight = SAP_ACS_WEIGHT_MAX * 2;
continue;
}
/*
* check if there is another channel combination possiblity
* e.g., {1, 5} & {5, 9}
*/
if ((pSpectInfo[j + 4].chNum + 4) == pSpectInfo[j + 8].chNum) {
/* need to compare two channel pairs */
tmpWeight1 = pSpectInfo[j].weight +
pSpectInfo[j + 4].weight;
tmpWeight2 = pSpectInfo[j + 4].weight +
pSpectInfo[j + 8].weight;
if (tmpWeight1 <= tmpWeight2) {
if (pSpectInfo[j].weight <=
pSpectInfo[j + 4].weight) {
pSpectInfo[j].weight =
tmpWeight1;
pSpectInfo[j + 4].weight =
SAP_ACS_WEIGHT_MAX * 2;
pSpectInfo[j + 8].weight =
SAP_ACS_WEIGHT_MAX * 2;
} else {
pSpectInfo[j + 4].weight =
tmpWeight1;
/* for secondary channel selection */
pSpectInfo[j].weight =
SAP_ACS_WEIGHT_MAX * 2
- 1;
pSpectInfo[j + 8].weight =
SAP_ACS_WEIGHT_MAX * 2;
}
} else {
if (pSpectInfo[j + 4].weight <=
pSpectInfo[j + 8].weight) {
pSpectInfo[j + 4].weight =
tmpWeight2;
pSpectInfo[j].weight =
SAP_ACS_WEIGHT_MAX * 2;
/* for secondary channel selection */
pSpectInfo[j + 8].weight =
SAP_ACS_WEIGHT_MAX * 2
- 1;
} else {
pSpectInfo[j + 8].weight =
tmpWeight2;
pSpectInfo[j].weight =
SAP_ACS_WEIGHT_MAX * 2;
pSpectInfo[j + 4].weight =
SAP_ACS_WEIGHT_MAX * 2;
}
}
} else {
tmpWeight1 = pSpectInfo[j].weight_copy +
pSpectInfo[j + 4].weight_copy;
if (pSpectInfo[j].weight_copy <=
pSpectInfo[j + 4].weight_copy) {
pSpectInfo[j].weight = tmpWeight1;
pSpectInfo[j + 4].weight =
SAP_ACS_WEIGHT_MAX * 2;
} else {
pSpectInfo[j + 4].weight = tmpWeight1;
pSpectInfo[j].weight =
SAP_ACS_WEIGHT_MAX * 2;
}
}
}
/*
* Every channel should be checked. Add the check for the omissive
* channel. Mark the channel whose combination can't satisfy 40MHZ
* as max value, so that it will be sorted to the bottom.
*/
if (cds_is_fcc_regdomain())
ht40plus2gendch = HT40PLUS_2G_FCC_CH_END;
else
ht40plus2gendch = HT40PLUS_2G_EURJAP_CH_END;
for (i = HT40MINUS_2G_CH_START; i <= ht40plus2gendch; i++) {
for (j = 0; j < pSpectInfoParams->numSpectChans; j++) {
if (pSpectInfo[j].chNum == i &&
((pSpectInfo[j].chNum + 4) !=
pSpectInfo[j+4].chNum) &&
((pSpectInfo[j].chNum - 4) !=
pSpectInfo[j-4].chNum))
pSpectInfo[j].weight = SAP_ACS_WEIGHT_MAX * 2;
}
}
for (i = ht40plus2gendch + 1; i <= HT40MINUS_2G_CH_END; i++) {
for (j = 0; j < pSpectInfoParams->numSpectChans; j++) {
if (pSpectInfo[j].chNum == i &&
(pSpectInfo[j].chNum - 4) !=
pSpectInfo[j-4].chNum)
pSpectInfo[j].weight = SAP_ACS_WEIGHT_MAX * 2;
}
}
pSpectInfo = pSpectInfoParams->pSpectCh;
for (j = 0; j < (pSpectInfoParams->numSpectChans); j++) {
QDF_TRACE(QDF_MODULE_ID_SAP, QDF_TRACE_LEVEL_INFO_HIGH,
"In %s, Channel=%d Weight= %d rssi=%d bssCount=%d",
__func__, pSpectInfo->chNum, pSpectInfo->weight,
pSpectInfo->rssiAgr, pSpectInfo->bssCount);
pSpectInfo++;
}
sap_sort_chl_weight(pSpectInfoParams);
}
/*==========================================================================
FUNCTION sap_sort_chl_weight_ht40_5_g
DESCRIPTION
Funtion to sort the channels with the least weight first for HT40 channels
DEPENDENCIES
NA.
PARAMETERS
IN
pSpectInfoParams : Pointer to the tSapChSelSpectInfo structure
RETURN VALUE
void : NULL
SIDE EFFECTS
============================================================================*/
static void sap_sort_chl_weight_ht40_5_g(tSapChSelSpectInfo *pSpectInfoParams)
{
uint8_t i, j;
tSapSpectChInfo *pSpectInfo;
pSpectInfo = pSpectInfoParams->pSpectCh;
/*for each HT40 channel, calculate the combined weight of the
two 20MHz weight */
for (i = 0; i < ARRAY_SIZE(acs_ht40_channels5_g); i++) {
for (j = 0; j < pSpectInfoParams->numSpectChans; j++) {
if (pSpectInfo[j].chNum ==
acs_ht40_channels5_g[i].chStartNum)
break;
}
if (j == pSpectInfoParams->numSpectChans)
continue;
/* found the channel, add the two adjacent channels' weight */
if ((pSpectInfo[j].chNum + 4) == pSpectInfo[j + 1].chNum) {
acs_ht40_channels5_g[i].weight = pSpectInfo[j].weight +
pSpectInfo[j + 1].weight;
/* select better of the adjact channel as the primary channel */
if (pSpectInfo[j].weight <= pSpectInfo[j + 1].weight) {
pSpectInfo[j].weight =
acs_ht40_channels5_g[i].weight;
/* mark the adjacent channel's weight as max value so
that it will be sorted to the bottom */
pSpectInfo[j + 1].weight =
SAP_ACS_WEIGHT_MAX * 2;
} else {
pSpectInfo[j + 1].weight =
acs_ht40_channels5_g[i].weight;
/* mark the adjacent channel's weight as max value so
that it will be sorted to the bottom */
pSpectInfo[j].weight = SAP_ACS_WEIGHT_MAX * 2;
}
} else
pSpectInfo[j].weight = SAP_ACS_WEIGHT_MAX * 2;
}
/*
*Every channel should be checked. Add the check for the omissive
* channel. Mark the channel whose combination can't satisfy 40MHZ
* as max value, so that it will be sorted to the bottom
*/
for (j = 1; j < pSpectInfoParams->numSpectChans; j++) {
for (i = 0; i < ARRAY_SIZE(acs_ht40_channels5_g); i++) {
if (pSpectInfo[j].chNum ==
(acs_ht40_channels5_g[i].chStartNum + 4) &&
pSpectInfo[j-1].chNum !=
acs_ht40_channels5_g[i].chStartNum) {
pSpectInfo[j].weight = SAP_ACS_WEIGHT_MAX * 2;
break;
}
}
}
/* avoid channel 165 by setting its weight to max */
pSpectInfo = pSpectInfoParams->pSpectCh;
for (j = 0; j < pSpectInfoParams->numSpectChans; j++) {
if (CHANNEL_165 == pSpectInfo[j].chNum) {
pSpectInfo[j].weight = SAP_ACS_WEIGHT_MAX * 2;
break;
}
}
pSpectInfo = pSpectInfoParams->pSpectCh;
for (j = 0; j < (pSpectInfoParams->numSpectChans); j++) {
QDF_TRACE(QDF_MODULE_ID_SAP, QDF_TRACE_LEVEL_INFO_HIGH,
"In %s, Channel=%d Weight= %d rssi=%d bssCount=%d",
__func__, pSpectInfo->chNum, pSpectInfo->weight,
pSpectInfo->rssiAgr, pSpectInfo->bssCount);
pSpectInfo++;
}
sap_sort_chl_weight(pSpectInfoParams);
}
/*==========================================================================
FUNCTION sap_sort_chl_weight_all
DESCRIPTION
Funtion to sort the channels with the least weight first
DEPENDENCIES
NA.
PARAMETERS
IN
ptSapContext : Pointer to the ptSapContext structure
pSpectInfoParams : Pointer to the tSapChSelSpectInfo structure
RETURN VALUE
void : NULL
SIDE EFFECTS
============================================================================*/
static void sap_sort_chl_weight_all(ptSapContext pSapCtx,
tSapChSelSpectInfo *pSpectInfoParams,
uint32_t operatingBand)
{
tSapSpectChInfo *pSpectCh = NULL;
uint32_t j = 0;
#ifndef SOFTAP_CHANNEL_RANGE
uint32_t i = 0;
#endif
pSpectCh = pSpectInfoParams->pSpectCh;
#ifdef SOFTAP_CHANNEL_RANGE
switch (pSapCtx->acs_cfg->ch_width) {
case CH_WIDTH_40MHZ:
/*
* Assign max weight to all 5Ghz channels when operating band
* is 11g and to all 2.4Ghz channels when operating band is 11a
* or 11abg to avoid selection in ACS algorithm for starting SAP
*/
if (eCSR_DOT11_MODE_11g == operatingBand) {
sap_sort_chl_weight_ht40_24_g(pSpectInfoParams);
sap_allocate_max_weight_ht40_5_g(pSpectInfoParams);
} else {
sap_allocate_max_weight_ht40_24_g(pSpectInfoParams);
sap_sort_chl_weight_ht40_5_g(pSpectInfoParams);
}
break;
case CH_WIDTH_80MHZ:
case CH_WIDTH_80P80MHZ:
sap_sort_chl_weight_ht80(pSpectInfoParams);
break;
case CH_WIDTH_160MHZ:
sap_sort_chl_weight_vht160(pSpectInfoParams);
break;
case CH_WIDTH_20MHZ:
default:
/* Sorting the channels as per weights as 20MHz channels */
sap_sort_chl_weight(pSpectInfoParams);
}
#else
/* Sorting the channels as per weights */
for (i = 0; i < SPECT_24GHZ_CH_COUNT; i++) {
minWeightIndex = i;
for (j = i + 1; j < SPECT_24GHZ_CH_COUNT; j++) {
if (pSpectCh[j].weight <
pSpectCh[minWeightIndex].weight) {
minWeightIndex = j;
}
}
if (minWeightIndex != i) {
qdf_mem_copy(&temp, &pSpectCh[minWeightIndex],
sizeof(*pSpectCh));
qdf_mem_copy(&pSpectCh[minWeightIndex], &pSpectCh[i],
sizeof(*pSpectCh));
qdf_mem_copy(&pSpectCh[i], &temp, sizeof(*pSpectCh));
}
}
#endif
/* For testing */
QDF_TRACE(QDF_MODULE_ID_SAP, QDF_TRACE_LEVEL_INFO,
"In %s, Sorted Spectrum Channels Weight", __func__);
pSpectCh = pSpectInfoParams->pSpectCh;
for (j = 0; j < (pSpectInfoParams->numSpectChans); j++) {
QDF_TRACE(QDF_MODULE_ID_SAP, QDF_TRACE_LEVEL_INFO,
"In %s, Channel=%d Weight= %d rssi=%d bssCount=%d",
__func__, pSpectCh->chNum, pSpectCh->weight,
pSpectCh->rssiAgr, pSpectCh->bssCount);
pSpectCh++;
}
}
/**
* sap_is_ch_non_overlap() - returns true if non-overlapping channel
* @sap_ctx: Sap context
* @ch: channel number
*
* Returns: true if non-overlapping (1, 6, 11) channel, false otherwise
*/
static bool sap_is_ch_non_overlap(ptSapContext sap_ctx, uint16_t ch)
{
if (sap_ctx->enableOverLapCh)
return true;
if ((ch == CHANNEL_1) || (ch == CHANNEL_6) || (ch == CHANNEL_11))
return true;
return false;
}
#ifdef FEATURE_WLAN_CH_AVOID
/**
* sap_select_channel_no_scan_result() - select SAP channel when no scan results
* are available.
* @sap_ctx: Sap context
*
* Returns: channel number if success, 0 otherwise
*/
static uint8_t sap_select_channel_no_scan_result(tHalHandle hal,
ptSapContext sap_ctx)
{
enum channel_state ch_type;
uint8_t i, first_safe_ch_in_range = SAP_CHANNEL_NOT_SELECTED;
uint32_t dfs_master_cap_enabled;
uint32_t start_ch_num = sap_ctx->acs_cfg->start_ch;
uint32_t end_ch_num = sap_ctx->acs_cfg->end_ch;
QDF_TRACE(QDF_MODULE_ID_SAP, QDF_TRACE_LEVEL_INFO_HIGH,
FL("start - end: %d - %d"), start_ch_num, end_ch_num);
sme_cfg_get_int(hal, WNI_CFG_DFS_MASTER_ENABLED,
&dfs_master_cap_enabled);
QDF_TRACE(QDF_MODULE_ID_SAP, QDF_TRACE_LEVEL_INFO_HIGH,
"%s: dfs_master %x", __func__, dfs_master_cap_enabled);
/* get a channel in PCL and within the range */
for (i = 0; i < sap_ctx->acs_cfg->pcl_ch_count; i++) {
if ((sap_ctx->acs_cfg->pcl_channels[i] < start_ch_num) ||
(sap_ctx->acs_cfg->pcl_channels[i] > end_ch_num))
continue;
first_safe_ch_in_range = sap_ctx->acs_cfg->pcl_channels[i];
break;
}
if (SAP_CHANNEL_NOT_SELECTED != first_safe_ch_in_range)
return first_safe_ch_in_range;
for (i = 0; i < NUM_CHANNELS; i++) {
if ((safe_channels[i].channelNumber < start_ch_num) ||
(safe_channels[i].channelNumber > end_ch_num))
continue;
ch_type = cds_get_channel_state(safe_channels[i].channelNumber);
if ((ch_type == CHANNEL_STATE_DISABLE) ||
(ch_type == CHANNEL_STATE_INVALID))
continue;
if ((!dfs_master_cap_enabled) &&
(CHANNEL_STATE_DFS == ch_type)) {
QDF_TRACE(QDF_MODULE_ID_SAP, QDF_TRACE_LEVEL_INFO_HIGH,
"%s: DFS master mode disabled. Skip DFS channel %d",
__func__, safe_channels[i].channelNumber);
continue;
}
if ((sap_ctx->dfs_mode == ACS_DFS_MODE_DISABLE) &&
(CHANNEL_STATE_DFS == ch_type))
continue;
if (safe_channels[i].isSafe == true) {
QDF_TRACE(QDF_MODULE_ID_SAP, QDF_TRACE_LEVEL_INFO_HIGH,
FL("channel %d in the configuration is safe"),
safe_channels[i].channelNumber);
first_safe_ch_in_range = safe_channels[i].channelNumber;
break;
}
QDF_TRACE(QDF_MODULE_ID_SAP, QDF_TRACE_LEVEL_INFO_HIGH,
FL("channel %d in the configuration is unsafe"),
safe_channels[i].channelNumber);
}
/* if no channel selected return SAP_CHANNEL_NOT_SELECTED */
return first_safe_ch_in_range;
}
#else
static uint8_t sap_select_channel_no_scan_result(tHalHandle hal,
ptSapContext sap_ctx)
{
uint32_t start_ch_num = sap_ctx->acs_cfg->start_ch;
QDF_TRACE(QDF_MODULE_ID_SAP, QDF_TRACE_LEVEL_INFO_HIGH,
FL("start - end: %d - %d"),
start_ch_num,
sap_ctx->acs_cfg->end_ch);
sap_ctx->acs_cfg->pri_ch = start_ch_num;
sap_ctx->acs_cfg->ht_sec_ch = 0;
/* pick the first channel in configured range */
return start_ch_num;
}
#endif /* FEATURE_WLAN_CH_AVOID */
/**
* sap_select_channel() - select SAP channel
* @hal: Pointer to HAL handle
* @sap_ctx: Sap context
* @scan_result: Pointer to tScanResultHandle
*
* Runs a algorithm to select the best channel to operate in based on BSS
* rssi and bss count on each channel
*
* Returns: channel number if success, 0 otherwise
*/
uint8_t sap_select_channel(tHalHandle hal, ptSapContext sap_ctx,
tScanResultHandle scan_result)
{
/* DFS param object holding all the data req by the algo */
tSapChSelSpectInfo spect_info_obj = { NULL, 0 };
tSapChSelSpectInfo *spect_info = &spect_info_obj;
uint8_t best_ch_num = SAP_CHANNEL_NOT_SELECTED;
uint32_t ht40plus2gendch = 0;
#ifdef SOFTAP_CHANNEL_RANGE
uint8_t count;
uint32_t start_ch_num, end_ch_num, tmp_ch_num, operating_band = 0;
#endif
QDF_TRACE(QDF_MODULE_ID_SAP, QDF_TRACE_LEVEL_INFO_HIGH,
"In %s, Running SAP Ch Select", __func__);
#ifdef FEATURE_WLAN_CH_AVOID
sap_update_unsafe_channel_list(sap_ctx);
#endif
/*
* If ACS weight is not enabled on noise_floor/channel_free/tx_power,
* then skip acs process if no bss found.
*/
if (NULL == scan_result &&
!(sap_ctx->auto_channel_select_weight & 0xffff00)) {
QDF_TRACE(QDF_MODULE_ID_SAP, QDF_TRACE_LEVEL_INFO_HIGH,
FL("No external AP present"));
#ifndef SOFTAP_CHANNEL_RANGE
return SAP_CHANNEL_NOT_SELECTED;
#else
return sap_select_channel_no_scan_result(hal, sap_ctx);
#endif
}
/* Initialize the structure pointed by spect_info */
if (sap_chan_sel_init(hal, spect_info, sap_ctx) != true) {
QDF_TRACE(QDF_MODULE_ID_SAP, QDF_TRACE_LEVEL_ERROR,
FL("Ch Select initialization failed"));
return SAP_CHANNEL_NOT_SELECTED;
}
/* Compute the weight of the entire spectrum in the operating band */
sap_compute_spect_weight(spect_info, hal, scan_result, sap_ctx);
#ifdef FEATURE_AP_MCC_CH_AVOIDANCE
/* process avoid channel IE to collect all channels to avoid */
sap_process_avoid_ie(hal, sap_ctx, scan_result, spect_info);
#endif /* FEATURE_AP_MCC_CH_AVOIDANCE */
#ifdef SOFTAP_CHANNEL_RANGE
start_ch_num = sap_ctx->acs_cfg->start_ch;
end_ch_num = sap_ctx->acs_cfg->end_ch;
SET_ACS_BAND(operating_band, sap_ctx);
sap_ctx->acsBestChannelInfo.channelNum = 0;
sap_ctx->acsBestChannelInfo.weight = SAP_ACS_WEIGHT_MAX;
/* Sort the ch lst as per the computed weights, lesser weight first. */
sap_sort_chl_weight_all(sap_ctx, spect_info, operating_band);
/*Loop till get the best channel in the given range */
for (count = 0; count < spect_info->numSpectChans; count++) {
if ((start_ch_num > spect_info->pSpectCh[count].chNum) ||
(end_ch_num < spect_info->pSpectCh[count].chNum))
continue;
if (best_ch_num == SAP_CHANNEL_NOT_SELECTED) {
best_ch_num = spect_info->pSpectCh[count].chNum;
/* check if best_ch_num is in preferred channel list */
best_ch_num =
sap_select_preferred_channel_from_channel_list(
best_ch_num, sap_ctx, spect_info);
/* if not in preferred ch lst, go to nxt best ch */
if (best_ch_num == SAP_CHANNEL_NOT_SELECTED)
continue;
#ifdef FEATURE_AP_MCC_CH_AVOIDANCE
/*
* Weight of the channels(device's AP is operating)
* increased to MAX+1 so that they will be choosen only
* when there is no other best channel to choose
*/
if (sap_check_in_avoid_ch_list(sap_ctx, best_ch_num)) {
best_ch_num = SAP_CHANNEL_NOT_SELECTED;
continue;
}
#endif
sap_ctx->acsBestChannelInfo.channelNum = best_ch_num;
sap_ctx->acsBestChannelInfo.weight =
spect_info->pSpectCh[count].weight_copy;
}
if (best_ch_num == SAP_CHANNEL_NOT_SELECTED)
continue;
if (operating_band != eCSR_DOT11_MODE_11g) {
QDF_TRACE(QDF_MODULE_ID_SAP,
QDF_TRACE_LEVEL_INFO_HIGH,
"operating_band %d", operating_band);
continue;
}
/* Give preference to Non-overlap channels */
if (false == sap_is_ch_non_overlap(sap_ctx,
spect_info->pSpectCh[count].chNum)) {
QDF_TRACE(QDF_MODULE_ID_SAP,
QDF_TRACE_LEVEL_INFO_HIGH,
FL("ch: %d skipped as its overlapping ch"),
spect_info->pSpectCh[count].chNum);
continue;
}
if (spect_info->pSpectCh[count].weight_copy >
sap_ctx->acsBestChannelInfo.weight) {
QDF_TRACE(QDF_MODULE_ID_SAP,
QDF_TRACE_LEVEL_INFO_HIGH,
"candidate ch weight: %d, best ch weight: %d",
spect_info->pSpectCh[count].weight_copy,
sap_ctx->acsBestChannelInfo.weight);
continue;
}
if (CDS_IS_DFS_CH(spect_info->pSpectCh[count].chNum) &&
cds_disallow_mcc(spect_info->pSpectCh[count].chNum)) {
QDF_TRACE(QDF_MODULE_ID_SAP,
QDF_TRACE_LEVEL_INFO_HIGH,
"No DFS MCC");
continue;
}
tmp_ch_num = spect_info->pSpectCh[count].chNum;
tmp_ch_num = sap_channel_in_acs_channel_list(
tmp_ch_num, sap_ctx, spect_info);
if (tmp_ch_num == SAP_CHANNEL_NOT_SELECTED)
continue;
best_ch_num = tmp_ch_num;
break;
}
#else
/* Sort the ch lst as per the computed weights, lesser weight first. */
sap_sort_chl_weight_all(sap_ctx, hal, spect_info);
/* Get the first channel in sorted array as best 20M Channel */
best_ch_num = (uint8_t) spect_info->pSpectCh[0].chNum;
/* Select Best Channel from Channel List if Configured */
best_ch_num = sap_select_preferred_channel_from_channel_list(
best_ch_num, sap_ctx, spect_info);
#endif
/*
* in case the best channel seleted is not in PCL and there is another
* channel which has same weightage and is in PCL, choose the one in
* PCL
*/
for (count = 0; count < spect_info->numSpectChans; count++) {
if (!ch_in_pcl(sap_ctx, spect_info->pSpectCh[count].chNum) ||
(spect_info->pSpectCh[count].weight !=
sap_ctx->acsBestChannelInfo.weight))
continue;
if (sap_select_preferred_channel_from_channel_list(
spect_info->pSpectCh[count].chNum, sap_ctx, spect_info)
== SAP_CHANNEL_NOT_SELECTED)
continue;
#ifdef FEATURE_AP_MCC_CH_AVOIDANCE
if (sap_check_in_avoid_ch_list(sap_ctx, best_ch_num))
continue;
#endif
best_ch_num = spect_info->pSpectCh[count].chNum;
QDF_TRACE(QDF_MODULE_ID_SAP, QDF_TRACE_LEVEL_INFO_HIGH,
FL("change best channel to %d in PCL"), best_ch_num);
break;
}
sap_ctx->acs_cfg->pri_ch = best_ch_num;
/* determine secondary channel for 2.4G channel 5, 6, 7 in HT40 */
if ((operating_band != eCSR_DOT11_MODE_11g) ||
(sap_ctx->acs_cfg->ch_width != CH_WIDTH_40MHZ))
goto sap_ch_sel_end;
if (cds_is_fcc_regdomain())
ht40plus2gendch = HT40PLUS_2G_FCC_CH_END;
else
ht40plus2gendch = HT40PLUS_2G_EURJAP_CH_END;
if ((best_ch_num >= HT40MINUS_2G_CH_START) &&
(best_ch_num <= ht40plus2gendch)) {
int weight_below, weight_above, i;
tSapSpectChInfo *pspect_info;
weight_below = weight_above = SAP_ACS_WEIGHT_MAX;
pspect_info = spect_info->pSpectCh;
for (i = 0; i < spect_info->numSpectChans; i++) {
if (pspect_info[i].chNum == (best_ch_num - 4))
weight_below = pspect_info[i].weight;
if (pspect_info[i].chNum == (best_ch_num + 4))
weight_above = pspect_info[i].weight;
}
if (weight_below < weight_above)
sap_ctx->acs_cfg->ht_sec_ch =
sap_ctx->acs_cfg->pri_ch - 4;
else
sap_ctx->acs_cfg->ht_sec_ch =
sap_ctx->acs_cfg->pri_ch + 4;
} else if (best_ch_num >= 1 && best_ch_num <= 4) {
sap_ctx->acs_cfg->ht_sec_ch = sap_ctx->acs_cfg->pri_ch + 4;
} else if (best_ch_num > ht40plus2gendch && best_ch_num <= HT40MINUS_2G_CH_END) {
sap_ctx->acs_cfg->ht_sec_ch = sap_ctx->acs_cfg->pri_ch - 4;
} else if (best_ch_num == 14) {
sap_ctx->acs_cfg->ht_sec_ch = 0;
}
sap_ctx->secondary_ch = sap_ctx->acs_cfg->ht_sec_ch;
sap_ch_sel_end:
/* Free all the allocated memory */
sap_chan_sel_exit(spect_info);
QDF_TRACE(QDF_MODULE_ID_SAP, QDF_TRACE_LEVEL_INFO_HIGH,
FL("Running SAP Ch select Completed, Ch=%d"), best_ch_num);
if (best_ch_num > 0 && best_ch_num <= 252)
return best_ch_num;
else
return SAP_CHANNEL_NOT_SELECTED;
}