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gerrit-public.fairphone.software / platform / vendor / qcom-opensource / wlan / qcacld-3.0 / 71562069e1cc4abec8f8ebad218f98d6ade91a72 / . / core / sap / src / sap_ch_select.c
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/*
* Copyright (c) 2012-2019 The Linux Foundation. All rights reserved.
*
* 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.
*/
/*===========================================================================
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"
#include <wlan_utility.h>
#endif /* FEATURE_AP_MCC_CH_AVOIDANCE */
#include "cds_utils.h"
#include "pld_common.h"
#include "wlan_reg_services_api.h"
#include <wlan_scan_utils_api.h>
/*--------------------------------------------------------------------------
Function definitions
--------------------------------------------------------------------------*/
/*--------------------------------------------------------------------------
Defines
--------------------------------------------------------------------------*/
#define SAP_DEBUG
#define IS_RSSI_VALID(extRssi, rssi) \
( \
((extRssi < rssi) ? true : false) \
)
#define SET_ACS_BAND(acs_band, sap_ctx) \
{ \
if (sap_ctx->acs_cfg->start_ch_freq <= \
WLAN_REG_CH_TO_FREQ(CHAN_ENUM_2484) && \
sap_ctx->acs_cfg->end_ch_freq <= \
WLAN_REG_CH_TO_FREQ(CHAN_ENUM_2484)) \
acs_band = eCSR_DOT11_MODE_11g; \
else if (sap_ctx->acs_cfg->start_ch_freq >= \
WLAN_REG_CH_TO_FREQ(CHAN_ENUM_2484))\
acs_band = eCSR_DOT11_MODE_11a; \
else \
acs_band = eCSR_DOT11_MODE_abg; \
}
#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)
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(struct sap_context *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(struct sap_context *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
* @mac_handle: opaque handle to the MAC context
* @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(mac_handle_t mac_handle, struct sap_context *sap_ctx,
qdf_list_t *scan_list, tSapChSelSpectInfo *spect_info)
{
const uint8_t *temp_ptr = NULL;
uint8_t i = 0;
struct sAvoidChannelIE *avoid_ch_ie;
struct mac_context *mac_ctx = NULL;
tSapSpectChInfo *spect_ch = NULL;
qdf_list_node_t *cur_lst = NULL, *next_lst = NULL;
struct scan_cache_node *cur_node = NULL;
uint32_t chan_freq;
mac_ctx = MAC_CONTEXT(mac_handle);
spect_ch = spect_info->pSpectCh;
if (scan_list)
qdf_list_peek_front(scan_list, &cur_lst);
while (cur_lst) {
cur_node = qdf_container_of(cur_lst, struct scan_cache_node,
node);
temp_ptr = wlan_get_vendor_ie_ptr_from_oui(
SIR_MAC_QCOM_VENDOR_OUI,
SIR_MAC_QCOM_VENDOR_SIZE,
util_scan_entry_ie_data(cur_node->entry),
util_scan_entry_ie_len(cur_node->entry));
if (temp_ptr) {
avoid_ch_ie = (struct sAvoidChannelIE *)temp_ptr;
if (avoid_ch_ie->type !=
QCOM_VENDOR_IE_MCC_AVOID_CH) {
qdf_list_peek_next(scan_list,
cur_lst, &next_lst);
cur_lst = next_lst;
next_lst = NULL;
continue;
}
sap_ctx->sap_detected_avoid_ch_ie.present = 1;
chan_freq =
wlan_reg_legacy_chan_to_freq(mac_ctx->pdev,
avoid_ch_ie->channel);
sap_debug("Q2Q-IE avoid freq = %d", chan_freq);
/* 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].chan_freq != chan_freq)
continue;
/*
* 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;
}
}
qdf_list_peek_next(scan_list, cur_lst, &next_lst);
cur_lst = next_lst;
next_lst = NULL;
}
}
#endif /* FEATURE_AP_MCC_CH_AVOIDANCE */
/**
* sap_select_preferred_channel_from_channel_list() - to calc best cahnnel
* @best_ch_freq: best chan freq 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: uint32_t best channel frequency
*/
static
uint32_t sap_select_preferred_channel_from_channel_list(uint32_t best_ch_freq,
struct sap_context *sap_ctx,
tSapChSelSpectInfo *spectinfo_param)
{
/*
* If Channel List is not Configured don't do anything
* Else return the Best Channel from the Channel List
*/
if ((!sap_ctx->acs_cfg->freq_list) ||
(!spectinfo_param) ||
(!sap_ctx->acs_cfg->ch_list_count))
return best_ch_freq;
if (wlansap_is_channel_present_in_acs_list(best_ch_freq,
sap_ctx->acs_cfg->freq_list,
sap_ctx->acs_cfg->ch_list_count))
return best_ch_freq;
return SAP_CHANNEL_NOT_SELECTED;
}
/**
* sap_chan_sel_init() - Initialize channel select
* @mac_handle: Opaque handle to the global MAC context
* @pSpectInfoParams: Pointer to tSapChSelSpectInfo structure
* @sap_ctx: Pointer to SAP Context
*
* Function sap_chan_sel_init allocates the memory, initializes the
* structures used by the channel selection algorithm
*
* Return: bool Success or FAIL
*/
static bool sap_chan_sel_init(mac_handle_t mac_handle,
tSapChSelSpectInfo *pSpectInfoParams,
struct sap_context *sap_ctx)
{
tSapSpectChInfo *pSpectCh = NULL;
uint32_t *pChans = NULL;
uint16_t channelnum = 0;
struct mac_context *mac = MAC_CONTEXT(mac_handle);
bool include_dfs_ch = true;
bool sta_sap_scc_on_dfs_chan =
policy_mgr_is_sta_sap_scc_allowed_on_dfs_chan(mac->psoc);
QDF_TRACE(QDF_MODULE_ID_SAP, QDF_TRACE_LEVEL_INFO_HIGH, "In %s",
__func__);
pSpectInfoParams->numSpectChans =
mac->scan.base_channels.numChannels;
/* Allocate memory for weight computation of 2.4GHz */
pSpectCh = qdf_mem_malloc((pSpectInfoParams->numSpectChans) *
sizeof(*pSpectCh));
if (!pSpectCh)
return false;
/* Initialize the pointers in the DfsParams to the allocated memory */
pSpectInfoParams->pSpectCh = pSpectCh;
pChans = mac->scan.base_channels.channel_freq_list;
#if defined(FEATURE_WLAN_STA_AP_MODE_DFS_DISABLE)
if (sap_ctx->dfs_ch_disable == true)
include_dfs_ch = false;
#endif
if (!mac->mlme_cfg->dfs_cfg.dfs_master_capable ||
ACS_DFS_MODE_DISABLE == sap_ctx->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++) {
uint8_t channel;
channel = wlan_reg_freq_to_chan(mac->pdev, *pChans);
pSpectCh->chan_freq = *pChans;
/* Initialise for all channels */
pSpectCh->rssiAgr = SOFTAP_MIN_RSSI;
/* Initialise max ACS weight for all channels */
pSpectCh->weight = SAP_ACS_WEIGHT_MAX;
/* check if the channel is in NOL blacklist */
if (sap_dfs_is_channel_in_nol_list(
sap_ctx, channel,
PHY_SINGLE_CHANNEL_CENTERED)) {
QDF_TRACE(QDF_MODULE_ID_SAP, QDF_TRACE_LEVEL_INFO_HIGH,
"In %s, Ch %d is in NOL list", __func__,
channel);
continue;
}
if (!include_dfs_ch || sta_sap_scc_on_dfs_chan) {
if (wlan_reg_is_dfs_ch(mac->pdev, channel)) {
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__, channel, include_dfs_ch,
sta_sap_scc_on_dfs_chan);
continue;
}
}
if (!policy_mgr_is_safe_channel(mac->psoc, *pChans))
continue;
/* OFDM rates are not supported on channel 14 */
if (channel == 14 &&
eCSR_DOT11_MODE_11b != sap_ctx->csr_roamProfile.phyMode)
continue;
/* Skip DSRC channels */
if (wlan_reg_is_dsrc_chan(mac->pdev, channel))
continue;
/*
* Skip the channels which are not in ACS config from user
* space
*/
if (!wlansap_is_channel_present_in_acs_list(*pChans,
sap_ctx->acs_cfg->freq_list,
sap_ctx->acs_cfg->ch_list_count))
continue;
pSpectCh->valid = true;
pSpectCh->weight = 0;
}
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: uint32_t Calculated channel weight based on above two
*/
static
uint32_t sapweight_rssi_count(struct sap_context *sap_ctx, int8_t rssi,
uint16_t count)
{
int32_t rssiWeight = 0;
int32_t countWeight = 0;
uint32_t rssicountWeight = 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 */
rssiWeight = ACS_WEIGHT_COMPUTE(sap_ctx->auto_channel_select_weight,
softap_rssi_weight_cfg,
rssi - SOFTAP_MIN_RSSI,
SOFTAP_MAX_RSSI - SOFTAP_MIN_RSSI);
if (rssiWeight > softap_rssi_weight_local)
rssiWeight = softap_rssi_weight_local;
else if (rssiWeight < 0)
rssiWeight = 0;
/* Weight from data count */
countWeight = ACS_WEIGHT_COMPUTE(sap_ctx->auto_channel_select_weight,
softap_count_weight_cfg,
count - SOFTAP_MIN_COUNT,
SOFTAP_MAX_COUNT - SOFTAP_MIN_COUNT);
if (countWeight > softap_count_weight_local)
countWeight = softap_count_weight_local;
rssicountWeight = rssiWeight + countWeight;
QDF_TRACE(QDF_MODULE_ID_SAP, QDF_TRACE_LEVEL_INFO_HIGH,
"In %s, rssiWeight=%d, countWeight=%d, rssicountWeight=%d",
__func__, rssiWeight, countWeight, rssicountWeight);
return rssicountWeight;
}
/**
* 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
(struct mac_context *p_mac, uint32_t chan_freq)
{
return csr_get_channel_status(p_mac, chan_freq);
}
/**
* sap_clear_channel_status() - clear chan info
* @p_mac: Pointer to Global MAC structure
*
* Return: none
*/
static void sap_clear_channel_status(struct mac_context *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(struct sap_context *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 || 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;
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(struct sap_context *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 || 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(struct sap_context *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 || 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(struct sap_context *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 || 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(struct sap_context *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_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 && pExtSpectCh >= spectch_start &&
pExtSpectCh < spectch_end) {
if (!WLAN_REG_IS_SAME_BAND_FREQS(pSpectCh->chan_freq,
pExtSpectCh->chan_freq))
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_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,
uint32_t ch_freq0,
uint32_t ch_freq1,
uint32_t op_chan_freq,
tSapSpectChInfo *spectch_start,
tSapSpectChInfo *spectch_end)
{
uint16_t num_ch;
int32_t offset = 0;
sap_debug("freq = %d, ch width = %d, ch_freq0 = %d ch_freq1 = %d",
op_chan_freq, chan_width, ch_freq0, ch_freq1);
switch (chan_width) {
case eHT_CHANNEL_WIDTH_40MHZ:
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:
case eHT_CHANNEL_WIDTH_80P80MHZ:
num_ch = 3;
if ((ch_freq0 - op_chan_freq) == 30) {
offset = 1;
} else if ((ch_freq0 - op_chan_freq) == 10) {
offset = -1;
} else if ((ch_freq0 - op_chan_freq) == -10) {
offset = -2;
} else if ((ch_freq0 - op_chan_freq) == -30) {
offset = -3;
}
break;
case eHT_CHANNEL_WIDTH_160MHZ:
num_ch = 7;
if ((ch_freq0 - op_chan_freq) == 70)
offset = 1;
else if ((ch_freq0 - op_chan_freq) == 50)
offset = -1;
else if ((ch_freq0 - op_chan_freq) == 30)
offset = -2;
else if ((ch_freq0 - op_chan_freq) == 10)
offset = -3;
else if ((ch_freq0 - op_chan_freq) == -10)
offset = -4;
else if ((ch_freq0 - op_chan_freq) == -30)
offset = -5;
else if ((ch_freq0 - op_chan_freq) == -50)
offset = -6;
else if ((ch_freq0 - op_chan_freq) == -70)
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 (!spect_ch) {
QDF_TRACE(QDF_MODULE_ID_SAP, QDF_TRACE_LEVEL_ERROR,
"%s: spect_ch is NULL", __func__);
return;
}
switch (wlan_freq_to_chan(spect_ch->chan_freq)) {
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(struct sap_context *sap_ctx, uint32_t ch_freq)
{
uint32_t i;
for (i = 0; i < sap_ctx->acs_cfg->pcl_ch_count; i++) {
if (ch_freq == sap_ctx->acs_cfg->pcl_chan_freq[i])
return true;
}
return false;
}
/**
* sap_upd_chan_spec_params() - sap_upd_chan_spec_params
* updates channel parameters obtained from Beacon
* @scan_entry: Beacon strucutre populated by scan
* @ch_width: Channel width
* @sec_ch_offset: Secondary Channel Offset
* @center_freq0: Central frequency 0 for the given channel
* @center_freq1: Central frequency 1 for the given channel
*
* sap_upd_chan_spec_params updates the spectrum channels based on the
* scan_entry
*
* Return: NA.
*/
static void
sap_upd_chan_spec_params(struct scan_cache_node *scan_entry,
tSirMacHTChannelWidth *ch_width,
uint16_t *sec_ch_offset,
uint32_t *center_freq0,
uint32_t *center_freq1)
{
enum wlan_phymode phy_mode;
struct channel_info *chan;
phy_mode = util_scan_entry_phymode(scan_entry->entry);
chan = util_scan_entry_channel(scan_entry->entry);
if (IS_WLAN_PHYMODE_160MHZ(phy_mode)) {
if (phy_mode == WLAN_PHYMODE_11AC_VHT80_80 ||
phy_mode == WLAN_PHYMODE_11AXA_HE80_80) {
*ch_width = eHT_CHANNEL_WIDTH_80P80MHZ;
*center_freq0 = chan->cfreq0;
*center_freq1 = chan->cfreq1;
} else {
*ch_width = eHT_CHANNEL_WIDTH_160MHZ;
if (chan->cfreq1)
*center_freq0 = chan->cfreq1;
else
*center_freq0 = chan->cfreq0;
}
} else if (IS_WLAN_PHYMODE_80MHZ(phy_mode)) {
*ch_width = eHT_CHANNEL_WIDTH_80MHZ;
*center_freq0 = chan->cfreq0;
} else if (IS_WLAN_PHYMODE_40MHZ(phy_mode)) {
if (chan->cfreq0 > chan->chan_freq)
*sec_ch_offset = PHY_DOUBLE_CHANNEL_LOW_PRIMARY;
else
*sec_ch_offset = PHY_DOUBLE_CHANNEL_HIGH_PRIMARY;
*ch_width = eHT_CHANNEL_WIDTH_40MHZ;
*center_freq0 = chan->cfreq0;
} else {
*ch_width = eHT_CHANNEL_WIDTH_20MHZ;
}
}
/**
* sap_compute_spect_weight() - Compute spectrum weight
* @pSpectInfoParams: Pointer to the tSpectInfoParams structure
* @mac_handle: Opaque handle to the global MAC context
* @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,
mac_handle_t mac_handle,
qdf_list_t *scan_list,
struct sap_context *sap_ctx)
{
int8_t rssi = 0;
uint8_t chn_num = 0;
tSapSpectChInfo *pSpectCh = pSpectInfoParams->pSpectCh;
tSirMacHTChannelWidth ch_width = 0;
uint16_t secondaryChannelOffset;
uint32_t center_freq0, center_freq1;
uint8_t i;
bool found;
struct mac_context *mac = MAC_CONTEXT(mac_handle);
tSapSpectChInfo *spectch_start = pSpectInfoParams->pSpectCh;
tSapSpectChInfo *spectch_end = pSpectInfoParams->pSpectCh +
pSpectInfoParams->numSpectChans;
qdf_list_node_t *cur_lst = NULL, *next_lst = NULL;
struct scan_cache_node *cur_node = NULL;
uint32_t normalized_weight;
uint8_t normalize_factor;
uint32_t chan_freq;
struct acs_weight *weight_list =
mac->mlme_cfg->acs.normalize_weight_chan;
struct acs_weight_range *range_list =
mac->mlme_cfg->acs.normalize_weight_range;
bool freq_present_in_list = false;
QDF_TRACE(QDF_MODULE_ID_SAP, QDF_TRACE_LEVEL_INFO_HIGH,
"In %s, Computing spectral weight", __func__);
if (scan_list)
qdf_list_peek_front(scan_list, &cur_lst);
while (cur_lst) {
cur_node = qdf_container_of(cur_lst, struct scan_cache_node,
node);
pSpectCh = pSpectInfoParams->pSpectCh;
/* Defining the default values, so that any value will hold the default values */
secondaryChannelOffset = PHY_SINGLE_CHANNEL_CENTERED;
center_freq0 = 0;
center_freq1 = 0;
chan_freq =
util_scan_entry_channel_frequency(cur_node->entry);
sap_upd_chan_spec_params(cur_node, &ch_width,
&secondaryChannelOffset,
&center_freq0, &center_freq1);
/* Processing for each tCsrScanResultInfo in the tCsrScanResult DLink list */
for (chn_num = 0; chn_num < pSpectInfoParams->numSpectChans;
chn_num++) {
if (chan_freq != pSpectCh->chan_freq) {
pSpectCh++;
continue;
}
if (pSpectCh->rssiAgr < cur_node->entry->rssi_raw)
pSpectCh->rssiAgr = cur_node->entry->rssi_raw;
++pSpectCh->bssCount;
if (WLAN_REG_IS_24GHZ_CH_FREQ(chan_freq))
sap_interference_rssi_count(pSpectCh,
spectch_start, spectch_end);
else
sap_interference_rssi_count_5G(
pSpectCh, ch_width, secondaryChannelOffset,
center_freq0, center_freq1, chan_freq,
spectch_start, spectch_end);
sap_debug("freq = %d, rssi aggr = %d, bss count yet = %d",
chan_freq, pSpectCh->rssiAgr,
pSpectCh->bssCount);
pSpectCh++;
break;
}
qdf_list_peek_next(scan_list, cur_lst, &next_lst);
cur_lst = next_lst;
next_lst = NULL;
}
/* Calculate the weights for all channels in the spectrum pSpectCh */
pSpectCh = pSpectInfoParams->pSpectCh;
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, pSpectCh->chan_freq))
rssi -= PCL_RSSI_DISCOUNT;
if (rssi < SOFTAP_MIN_RSSI)
rssi = SOFTAP_MIN_RSSI;
if (pSpectCh->weight == SAP_ACS_WEIGHT_MAX) {
pSpectCh->weight_copy = pSpectCh->weight;
goto debug_info;
}
/* There may be channels in scanlist, which were not sent to
* FW for scanning as part of ACS scan list, but they do have an
* effect on the neighbouring channels, so they help to find a
* suitable channel, but there weight should be max as they were
* and not meant to be included in the ACS scan results.
* So just assign RSSI as -100, bsscount as 0, and weight as max
* to them, so that they always stay low in sorting of best
* channles which were included in ACS scan list
*/
found = false;
for (i = 0; i < sap_ctx->num_of_channel; i++) {
if (pSpectCh->chan_freq == sap_ctx->freq_list[i]) {
/* Scan channel was included in ACS scan list */
found = true;
break;
}
}
if (found)
pSpectCh->weight =
SAPDFS_NORMALISE_1000 *
(sapweight_rssi_count(sap_ctx, rssi,
pSpectCh->bssCount) + sap_weight_channel_status(
sap_ctx, sap_get_channel_status(mac,
pSpectCh->chan_freq)));
else {
pSpectCh->weight = SAP_ACS_WEIGHT_MAX;
pSpectCh->rssiAgr = SOFTAP_MIN_RSSI;
rssi = SOFTAP_MIN_RSSI;
pSpectCh->bssCount = SOFTAP_MIN_COUNT;
}
chan_freq = pSpectCh->chan_freq;
/* Check if the freq is present in range list */
for (i = 0; i < mac->mlme_cfg->acs.num_weight_range; i++) {
if (chan_freq >= range_list[i].start_freq &&
chan_freq <= range_list[i].end_freq) {
normalize_factor =
range_list[i].normalize_weight;
sap_debug("Range list, freq %d normalize weight factor %d",
chan_freq, normalize_factor);
freq_present_in_list = true;
}
}
/* Check if user wants a special factor for this freq */
for (i = 0; i < mac->mlme_cfg->acs.normalize_weight_num_chan;
i++) {
if (chan_freq == weight_list[i].chan_freq) {
normalize_factor =
weight_list[i].normalize_weight;
sap_debug("freq %d normalize weight factor %d",
chan_freq, normalize_factor);
freq_present_in_list = true;
}
}
if (freq_present_in_list) {
normalized_weight =
((SAP_ACS_WEIGHT_MAX - pSpectCh->weight) *
(100 - normalize_factor)) / 100;
sap_debug("freq %d old weight %d new weight %d",
chan_freq, pSpectCh->weight,
pSpectCh->weight + normalized_weight);
pSpectCh->weight += normalized_weight;
freq_present_in_list = false;
}
if (pSpectCh->weight > SAP_ACS_WEIGHT_MAX)
pSpectCh->weight = SAP_ACS_WEIGHT_MAX;
pSpectCh->weight_copy = pSpectCh->weight;
debug_info:
sap_debug("freq = %d, weight = %d rssi = %d bss count = %d",
pSpectCh->chan_freq, pSpectCh->weight,
pSpectCh->rssiAgr, pSpectCh->bssCount);
pSpectCh++;
}
sap_clear_channel_status(mac);
}
/*==========================================================================
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
Function 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));
}
}
}
/**
* sap_sort_chl_weight_80_mhz() - to sort the channels with the least weight
* @pSpectInfoParams: Pointer to the tSapChSelSpectInfo structure
* Function to sort the channels with the least weight first for HT80 channels
*
* Return: none
*/
static void sap_sort_chl_weight_80_mhz(struct mac_context *mac_ctx,
tSapChSelSpectInfo *pSpectInfoParams)
{
uint8_t i, j;
tSapSpectChInfo *pSpectInfo;
uint8_t minIdx;
struct ch_params acs_ch_params;
int8_t center_freq_diff;
uint32_t combined_weight;
uint32_t min_ch_weight;
pSpectInfo = pSpectInfoParams->pSpectCh;
for (j = 0; j < pSpectInfoParams->numSpectChans; j++) {
if (pSpectInfo[j].weight_calc_done)
continue;
acs_ch_params.ch_width = CH_WIDTH_80MHZ;
wlan_reg_set_channel_params_for_freq(mac_ctx->pdev,
pSpectInfo[j].chan_freq,
0, &acs_ch_params);
/* Check if the freq supports 80 Mhz */
if (acs_ch_params.ch_width != CH_WIDTH_80MHZ) {
pSpectInfo[j].weight = SAP_ACS_WEIGHT_MAX * 4;
pSpectInfo[j].weight_calc_done = true;
continue;
}
center_freq_diff = acs_ch_params.mhz_freq_seg0 -
pSpectInfo[j].chan_freq;
/* This channel frequency does not have all channels */
if (center_freq_diff != 30) {
pSpectInfo[j].weight = SAP_ACS_WEIGHT_MAX * 4;
pSpectInfo[j].weight_calc_done = true;
continue;
}
/* no other freq left for 80 Mhz operation in spectrum */
if (j + 3 > pSpectInfoParams->numSpectChans)
continue;
/* Check whether all frequencies are present for 80 Mhz */
if (!(((pSpectInfo[j].chan_freq + 20) ==
pSpectInfo[j + 1].chan_freq) &&
((pSpectInfo[j].chan_freq + 40) ==
pSpectInfo[j + 2].chan_freq) &&
((pSpectInfo[j].chan_freq + 60) ==
pSpectInfo[j + 3].chan_freq))) {
/*
* 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;
pSpectInfo[j].weight_calc_done = true;
if ((pSpectInfo[j].chan_freq + 20) ==
pSpectInfo[j + 1].chan_freq) {
pSpectInfo[j + 1].weight =
SAP_ACS_WEIGHT_MAX * 4;
pSpectInfo[j +1].weight_calc_done = true;
}
if ((pSpectInfo[j].chan_freq + 40) ==
pSpectInfo[j + 2].chan_freq) {
pSpectInfo[j + 2].weight =
SAP_ACS_WEIGHT_MAX * 4;
pSpectInfo[j +2].weight_calc_done = true;
}
if ((pSpectInfo[j].chan_freq + 60) ==
pSpectInfo[j + 3].chan_freq) {
pSpectInfo[j + 3].weight =
SAP_ACS_WEIGHT_MAX * 4;
pSpectInfo[j +3].weight_calc_done = true;
}
continue;
}
/* We have 4 channels to calculate cumulative weight */
combined_weight = pSpectInfo[j].weight +
pSpectInfo[j + 1].weight +
pSpectInfo[j + 2].weight +
pSpectInfo[j + 3].weight;
min_ch_weight = pSpectInfo[j].weight;
minIdx = 0;
for (i = 0; i < 4; i++) {
if (min_ch_weight > pSpectInfo[j + i].weight) {
min_ch_weight = pSpectInfo[j + i].weight;
minIdx = i;
}
pSpectInfo[j + i].weight = SAP_ACS_WEIGHT_MAX * 4;
}
pSpectInfo[j + minIdx].weight = combined_weight;
sap_debug("best freq = %d for 80mhz center freq %d combined weight = %d",
pSpectInfo[j + minIdx].chan_freq,
acs_ch_params.mhz_freq_seg0,
combined_weight);
}
sap_sort_chl_weight(pSpectInfoParams);
pSpectInfo = pSpectInfoParams->pSpectCh;
for (j = 0; j < (pSpectInfoParams->numSpectChans); j++) {
sap_debug("freq = %d weight = %d rssi = %d bss count = %d",
pSpectInfo->chan_freq, pSpectInfo->weight,
pSpectInfo->rssiAgr, pSpectInfo->bssCount);
pSpectInfo++;
}
}
/**
* sap_sort_chl_weight_vht160() - to sort the channels with the least weight
* @pSpectInfoParams: Pointer to the tSapChSelSpectInfo structure
*
* Function to sort the channels with the least weight first for VHT160 channels
*
* Return: none
*/
static void sap_sort_chl_weight_160_mhz(struct mac_context *mac_ctx,
tSapChSelSpectInfo *pSpectInfoParams)
{
uint8_t i, j;
tSapSpectChInfo *pSpectInfo;
uint8_t minIdx;
struct ch_params acs_ch_params;
int8_t center_freq_diff;
uint32_t combined_weight;
uint32_t min_ch_weight;
pSpectInfo = pSpectInfoParams->pSpectCh;
for (j = 0; j < pSpectInfoParams->numSpectChans; j++) {
if (pSpectInfo[j].weight_calc_done)
continue;
acs_ch_params.ch_width = CH_WIDTH_160MHZ;
wlan_reg_set_channel_params_for_freq(mac_ctx->pdev,
pSpectInfo[j].chan_freq,
0, &acs_ch_params);
/* Check if the freq supports 160 Mhz */
if (acs_ch_params.ch_width != CH_WIDTH_160MHZ) {
pSpectInfo[j].weight = SAP_ACS_WEIGHT_MAX * 8;
pSpectInfo[j].weight_calc_done = true;
continue;
}
center_freq_diff = acs_ch_params.mhz_freq_seg1 -
pSpectInfo[j].chan_freq;
/* This channel frequency does not have all channels */
if (center_freq_diff != 70) {
pSpectInfo[j].weight = SAP_ACS_WEIGHT_MAX * 8;
pSpectInfo[j].weight_calc_done = true;
continue;
}
/* no other freq left for 160 Mhz operation in spectrum */
if (j + 7 > pSpectInfoParams->numSpectChans)
continue;
/* Check whether all frequencies are present for 160 Mhz */
if (!(((pSpectInfo[j].chan_freq + 20) ==
pSpectInfo[j + 1].chan_freq) &&
((pSpectInfo[j].chan_freq + 40) ==
pSpectInfo[j + 2].chan_freq) &&
((pSpectInfo[j].chan_freq + 60) ==
pSpectInfo[j + 3].chan_freq) &&
((pSpectInfo[j].chan_freq + 80) ==
pSpectInfo[j + 4].chan_freq) &&
((pSpectInfo[j].chan_freq + 100) ==
pSpectInfo[j + 5].chan_freq) &&
((pSpectInfo[j].chan_freq + 120) ==
pSpectInfo[j + 6].chan_freq) &&
((pSpectInfo[j].chan_freq + 140) ==
pSpectInfo[j + 7].chan_freq))) {
/*
* 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;
pSpectInfo[j].weight_calc_done = true;
if ((pSpectInfo[j].chan_freq + 20) ==
pSpectInfo[j + 1].chan_freq) {
pSpectInfo[j + 1].weight =
SAP_ACS_WEIGHT_MAX * 8;
pSpectInfo[j + 1].weight_calc_done = true;
}
if ((pSpectInfo[j].chan_freq + 40) ==
pSpectInfo[j + 2].chan_freq) {
pSpectInfo[j + 2].weight =
SAP_ACS_WEIGHT_MAX * 8;
pSpectInfo[j + 2].weight_calc_done = true;
}
if ((pSpectInfo[j].chan_freq + 60) ==
pSpectInfo[j + 3].chan_freq) {
pSpectInfo[j + 3].weight =
SAP_ACS_WEIGHT_MAX * 8;
pSpectInfo[j + 3].weight_calc_done = true;
}
if ((pSpectInfo[j].chan_freq + 80) ==
pSpectInfo[j + 4].chan_freq) {
pSpectInfo[j + 4].weight =
SAP_ACS_WEIGHT_MAX * 8;
pSpectInfo[j + 4].weight_calc_done = true;
}
if ((pSpectInfo[j].chan_freq + 100) ==
pSpectInfo[j + 5].chan_freq) {
pSpectInfo[j + 5].weight =
SAP_ACS_WEIGHT_MAX * 8;
pSpectInfo[j + 5].weight_calc_done = true;
}
if ((pSpectInfo[j].chan_freq + 120) ==
pSpectInfo[j + 6].chan_freq) {
pSpectInfo[j + 6].weight =
SAP_ACS_WEIGHT_MAX * 8;
pSpectInfo[j + 6].weight_calc_done = true;
}
if ((pSpectInfo[j].chan_freq + 140) ==
pSpectInfo[j + 7].chan_freq) {
pSpectInfo[j + 7].weight =
SAP_ACS_WEIGHT_MAX * 8;
pSpectInfo[j + 7].weight_calc_done = true;
}
continue;
}
/* We have 8 channels to calculate cumulative weight */
combined_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;
min_ch_weight = pSpectInfo[j].weight;
minIdx = 0;
for (i = 0; i < 8; i++) {
if (min_ch_weight > pSpectInfo[j + i].weight) {
min_ch_weight = pSpectInfo[j + i].weight;
minIdx = i;
}
pSpectInfo[j + i].weight = SAP_ACS_WEIGHT_MAX * 8;
}
pSpectInfo[j + minIdx].weight = combined_weight;
sap_debug("best freq = %d for 160mhz center freq %d combined weight = %d",
pSpectInfo[j + minIdx].chan_freq,
acs_ch_params.mhz_freq_seg1,
combined_weight);
}
sap_sort_chl_weight(pSpectInfoParams);
pSpectInfo = pSpectInfoParams->pSpectCh;
for (j = 0; j < (pSpectInfoParams->numSpectChans); j++) {
sap_debug("freq = %d weight = %d rssi = %d bss count = %d",
pSpectInfo->chan_freq, 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_40_mhz_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 (WLAN_REG_IS_24GHZ_CH_FREQ(spect_info[j].chan_freq))
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_40_mhz(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 (WLAN_REG_IS_5GHZ_CH_FREQ(spect_info[j].chan_freq) ||
WLAN_REG_IS_6GHZ_CHAN_FREQ(spect_info[j].chan_freq))
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
*
* Function to sort the channels with the least weight first for HT40 channels
*
* Return: none
*/
static void sap_sort_chl_weight_ht40_24_g(struct mac_context *mac_ctx,
tSapChSelSpectInfo *pSpectInfoParams,
v_REGDOMAIN_t domain)
{
uint8_t i, j;
tSapSpectChInfo *pSpectInfo;
uint32_t tmpWeight1, tmpWeight2;
uint32_t ht40plus2gendch = 0;
uint32_t channel;
uint32_t chan_freq;
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++) {
channel = wlan_freq_to_chan(pSpectInfo[j].chan_freq);
if (channel == acs_ht40_channels24_g[i].chStartNum)
break;
}
if (j == pSpectInfoParams->numSpectChans)
continue;
if (!((pSpectInfo[j].chan_freq + 20) ==
pSpectInfo[j + 4].chan_freq)) {
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].chan_freq + 20) ==
pSpectInfo[j + 8].chan_freq) {
/* 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 (REGDOMAIN_FCC == domain)
ht40plus2gendch = HT40PLUS_2G_FCC_CH_END;
else
ht40plus2gendch = HT40PLUS_2G_EURJAP_CH_END;
for (i = HT40MINUS_2G_CH_START; i <= ht40plus2gendch; i++) {
chan_freq = wlan_reg_legacy_chan_to_freq(mac_ctx->pdev, i);
for (j = 0; j < pSpectInfoParams->numSpectChans; j++) {
if (pSpectInfo[j].chan_freq == chan_freq &&
((pSpectInfo[j].chan_freq + 20) !=
pSpectInfo[j + 4].chan_freq) &&
((pSpectInfo[j].chan_freq - 20) !=
pSpectInfo[j - 4].chan_freq))
pSpectInfo[j].weight = SAP_ACS_WEIGHT_MAX * 2;
}
}
for (i = ht40plus2gendch + 1; i <= HT40MINUS_2G_CH_END; i++) {
chan_freq = wlan_reg_legacy_chan_to_freq(mac_ctx->pdev, i);
for (j = 0; j < pSpectInfoParams->numSpectChans; j++) {
if (pSpectInfo[j].chan_freq == chan_freq &&
(pSpectInfo[j].chan_freq - 20) !=
pSpectInfo[j - 4].chan_freq)
pSpectInfo[j].weight = SAP_ACS_WEIGHT_MAX * 2;
}
}
pSpectInfo = pSpectInfoParams->pSpectCh;
for (j = 0; j < (pSpectInfoParams->numSpectChans); j++) {
sap_debug("freq = %d weight = %d rssi = %d bss count = %d",
pSpectInfo->chan_freq, pSpectInfo->weight,
pSpectInfo->rssiAgr, pSpectInfo->bssCount);
pSpectInfo++;
}
sap_sort_chl_weight(pSpectInfoParams);
}
static void sap_sort_chl_weight_40_mhz(struct mac_context *mac_ctx,
tSapChSelSpectInfo *pSpectInfoParams)
{
uint8_t i, j;
tSapSpectChInfo *pSpectInfo;
uint8_t minIdx;
struct ch_params acs_ch_params;
int8_t center_freq_diff;
uint32_t combined_weight;
uint32_t min_ch_weight;
pSpectInfo = pSpectInfoParams->pSpectCh;
for (j = 0; j < pSpectInfoParams->numSpectChans; j++) {
if (WLAN_REG_IS_24GHZ_CH_FREQ(pSpectInfo[j].chan_freq))
continue;
if (pSpectInfo[j].weight_calc_done)
continue;
acs_ch_params.ch_width = CH_WIDTH_40MHZ;
wlan_reg_set_channel_params_for_freq(mac_ctx->pdev,
pSpectInfo[j].chan_freq,
0, &acs_ch_params);
/* Check if the freq supports 40 Mhz */
if (acs_ch_params.ch_width != CH_WIDTH_40MHZ) {
pSpectInfo[j].weight = SAP_ACS_WEIGHT_MAX * 2;
pSpectInfo[j].weight_calc_done = true;
continue;
}
center_freq_diff = acs_ch_params.mhz_freq_seg0 -
pSpectInfo[j].chan_freq;
/* This channel frequency does not have all channels */
if (center_freq_diff != 10) {
pSpectInfo[j].weight = SAP_ACS_WEIGHT_MAX * 2;
pSpectInfo[j].weight_calc_done = true;
continue;
}
/* no other freq left for 40 Mhz operation in spectrum */
if (j + 1 > pSpectInfoParams->numSpectChans)
continue;
/* Check whether all frequencies are present for 40 Mhz */
if (!((pSpectInfo[j].chan_freq + 20) ==
pSpectInfo[j + 1].chan_freq)) {
/*
* some channels does not exist in pSectInfo array,
* skip this channel and those in the same 40 width
*/
pSpectInfo[j].weight = SAP_ACS_WEIGHT_MAX * 2;
pSpectInfo[j].weight_calc_done = true;
if ((pSpectInfo[j].chan_freq + 20) ==
pSpectInfo[j + 1].chan_freq) {
pSpectInfo[j + 1].weight =
SAP_ACS_WEIGHT_MAX * 2;
pSpectInfo[j +1].weight_calc_done = true;
}
continue;
}
/* We have 2 channels to calculate cumulative weight */
combined_weight = pSpectInfo[j].weight +
pSpectInfo[j + 1].weight;
min_ch_weight = pSpectInfo[j].weight;
minIdx = 0;
for (i = 0; i < 2; i++) {
if (min_ch_weight > pSpectInfo[j + i].weight) {
min_ch_weight = pSpectInfo[j + i].weight;
minIdx = i;
}
pSpectInfo[j + i].weight = SAP_ACS_WEIGHT_MAX * 2;
}
pSpectInfo[j + minIdx].weight = combined_weight;
sap_debug("best freq = %d for 40mhz center freq %d combined weight = %d",
pSpectInfo[j + minIdx].chan_freq,
acs_ch_params.mhz_freq_seg0,
combined_weight);
}
sap_sort_chl_weight(pSpectInfoParams);
pSpectInfo = pSpectInfoParams->pSpectCh;
for (j = 0; j < (pSpectInfoParams->numSpectChans); j++) {
sap_debug("freq = %d weight = %d rssi = %d bss count = %d",
pSpectInfo->chan_freq, pSpectInfo->weight,
pSpectInfo->rssiAgr, pSpectInfo->bssCount);
pSpectInfo++;
}
}
/*==========================================================================
FUNCTION sap_sort_chl_weight_all
DESCRIPTION
Function to sort the channels with the least weight first
DEPENDENCIES
NA.
PARAMETERS
IN
sap_ctx : Pointer to the struct sap_context *structure
pSpectInfoParams : Pointer to the tSapChSelSpectInfo structure
RETURN VALUE
void : NULL
SIDE EFFECTS
============================================================================*/
static void sap_sort_chl_weight_all(struct mac_context *mac_ctx,
struct sap_context *sap_ctx,
tSapChSelSpectInfo *pSpectInfoParams,
uint32_t operatingBand,
v_REGDOMAIN_t domain)
{
tSapSpectChInfo *pSpectCh = NULL;
uint32_t j = 0;
pSpectCh = pSpectInfoParams->pSpectCh;
switch (sap_ctx->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_allocate_max_weight_40_mhz(pSpectInfoParams);
sap_sort_chl_weight_ht40_24_g(mac_ctx,
pSpectInfoParams,
domain);
} else {
sap_allocate_max_weight_40_mhz_24_g(pSpectInfoParams);
sap_sort_chl_weight_40_mhz(mac_ctx, pSpectInfoParams);
}
break;
case CH_WIDTH_80MHZ:
case CH_WIDTH_80P80MHZ:
sap_sort_chl_weight_80_mhz(mac_ctx, pSpectInfoParams);
break;
case CH_WIDTH_160MHZ:
sap_sort_chl_weight_160_mhz(mac_ctx, pSpectInfoParams);
break;
case CH_WIDTH_20MHZ:
default:
/* Sorting the channels as per weights as 20MHz channels */
sap_sort_chl_weight(pSpectInfoParams);
}
pSpectCh = pSpectInfoParams->pSpectCh;
for (j = 0; j < (pSpectInfoParams->numSpectChans); j++) {
sap_debug("Freq = %d weight = %d rssi aggr = %d bss count = %d",
pSpectCh->chan_freq, 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(struct sap_context *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;
}
uint32_t sap_select_channel(mac_handle_t mac_handle,
struct sap_context *sap_ctx,
qdf_list_t *scan_list)
{
/* 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 best_ch_weight = SAP_ACS_WEIGHT_MAX;
uint32_t ht40plus2gendch = 0;
v_REGDOMAIN_t domain;
uint8_t country[CDS_COUNTRY_CODE_LEN + 1];
uint8_t count;
uint32_t operating_band = 0;
struct mac_context *mac_ctx;
uint32_t best_chan_freq = 0;
mac_ctx = MAC_CONTEXT(mac_handle);
QDF_TRACE(QDF_MODULE_ID_SAP, QDF_TRACE_LEVEL_INFO_HIGH,
"In %s, Running SAP Ch Select", __func__);
/*
* If ACS weight is not enabled on noise_floor/channel_free/tx_power,
* then skip acs process if no bss found.
*/
if ((!scan_list || !qdf_list_size(scan_list)) &&
!(sap_ctx->auto_channel_select_weight & 0xffff00)) {
QDF_TRACE(QDF_MODULE_ID_SAP, QDF_TRACE_LEVEL_INFO_HIGH,
FL("No external AP present, select default channel"));
return sap_select_default_oper_chan(sap_ctx->acs_cfg);
}
/* Initialize the structure pointed by spect_info */
if (sap_chan_sel_init(mac_handle, 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, mac_handle, scan_list, sap_ctx);
#ifdef FEATURE_AP_MCC_CH_AVOIDANCE
/* process avoid channel IE to collect all channels to avoid */
sap_process_avoid_ie(mac_handle, sap_ctx, scan_list, spect_info);
#endif /* FEATURE_AP_MCC_CH_AVOIDANCE */
wlan_reg_read_current_country(mac_ctx->psoc, country);
wlan_reg_get_domain_from_country_code(&domain, country, SOURCE_DRIVER);
SET_ACS_BAND(operating_band, sap_ctx);
/* Sort the ch lst as per the computed weights, lesser weight first. */
sap_sort_chl_weight_all(mac_ctx, sap_ctx, spect_info, operating_band,
domain);
/*Loop till get the best channel in the given range */
for (count = 0; count < spect_info->numSpectChans; count++) {
best_chan_freq = spect_info->pSpectCh[count].chan_freq;
/* check if best_ch_num is in preferred channel list */
best_chan_freq =
sap_select_preferred_channel_from_channel_list(
best_chan_freq, sap_ctx, spect_info);
/* if not in preferred ch lst, go to nxt best ch */
if (best_chan_freq == 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 chosen only
* when there is no other best channel to choose
*/
if (!WLAN_REG_IS_6GHZ_CHAN_FREQ(best_chan_freq) &&
sap_check_in_avoid_ch_list(sap_ctx,
wlan_reg_freq_to_chan(mac_ctx->pdev, best_chan_freq))) {
best_chan_freq = SAP_CHANNEL_NOT_SELECTED;
continue;
}
#endif
/* Give preference to Non-overlap channels */
if (WLAN_REG_IS_24GHZ_CH_FREQ(best_chan_freq) &&
!sap_is_ch_non_overlap(sap_ctx,
wlan_reg_freq_to_chan(mac_ctx->pdev, best_chan_freq))) {
sap_debug("freq %d is overlapping, skipped",
best_chan_freq);
continue;
}
best_ch_weight = spect_info->pSpectCh[count].weight;
sap_debug("Freq = %d selected as best frequency weight = %d",
best_chan_freq, best_ch_weight);
break;
}
/*
* 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 (best_chan_freq == spect_info->pSpectCh[count].chan_freq)
continue;
if (!ch_in_pcl(sap_ctx,
spect_info->pSpectCh[count].chan_freq) ||
(spect_info->pSpectCh[count].weight != best_ch_weight))
continue;
if (sap_select_preferred_channel_from_channel_list(
spect_info->pSpectCh[count].chan_freq, sap_ctx,
spect_info)
== SAP_CHANNEL_NOT_SELECTED)
continue;
best_chan_freq = spect_info->pSpectCh[count].chan_freq;
sap_debug("Changed best freq to %d Preferred freq",
best_chan_freq);
break;
}
sap_ctx->acs_cfg->pri_ch_freq = best_chan_freq;
/* Below code is for 2.4Ghz freq, so freq to channel is safe here */
/* 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;
best_ch_num = wlan_reg_freq_to_chan(mac_ctx->pdev, best_chan_freq);
if (REGDOMAIN_FCC == domain)
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].chan_freq == (best_chan_freq - 20))
weight_below = pspect_info[i].weight;
if (pspect_info[i].chan_freq == (best_ch_num + 20))
weight_above = pspect_info[i].weight;
}
if (weight_below < weight_above)
sap_ctx->acs_cfg->ht_sec_ch_freq =
sap_ctx->acs_cfg->pri_ch_freq - 20;
else
sap_ctx->acs_cfg->ht_sec_ch_freq =
sap_ctx->acs_cfg->pri_ch_freq + 20;
} else if (best_ch_num >= 1 && best_ch_num <= 4) {
sap_ctx->acs_cfg->ht_sec_ch_freq =
sap_ctx->acs_cfg->pri_ch_freq + 20;
} else if (best_ch_num >= ht40plus2gendch && best_ch_num <=
HT40MINUS_2G_CH_END) {
sap_ctx->acs_cfg->ht_sec_ch_freq =
sap_ctx->acs_cfg->pri_ch_freq - 20;
} else if (best_ch_num == 14) {
sap_ctx->acs_cfg->ht_sec_ch_freq = 0;
}
sap_ctx->sec_ch_freq = sap_ctx->acs_cfg->ht_sec_ch_freq;
sap_ch_sel_end:
/* Free all the allocated memory */
sap_chan_sel_exit(spect_info);
return best_chan_freq;
}