| /* |
| * Copyright (c) 2012-2015 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 "cdf_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 */ |
| |
| #ifdef CONFIG_CNSS |
| #include <net/cnss.h> |
| #endif |
| |
| /*-------------------------------------------------------------------------- |
| 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; \ |
| } |
| |
| #ifdef FEATURE_WLAN_CH_AVOID |
| sapSafeChannelType safe_channels[NUM_20MHZ_RF_CHANNELS] = { |
| /*CH , SAFE, default safe */ |
| {1, true} |
| , /* RF_CHAN_1, */ |
| {2, true} |
| , /* RF_CHAN_2, */ |
| {3, true} |
| , /* RF_CHAN_3, */ |
| {4, true} |
| , /* RF_CHAN_4, */ |
| {5, true} |
| , /* RF_CHAN_5, */ |
| {6, true} |
| , /* RF_CHAN_6, */ |
| {7, true} |
| , /* RF_CHAN_7, */ |
| {8, true} |
| , /* RF_CHAN_8, */ |
| {9, true} |
| , /* RF_CHAN_9, */ |
| {10, true} |
| , /* RF_CHAN_10, */ |
| {11, true} |
| , /* RF_CHAN_11, */ |
| {12, true} |
| , /* RF_CHAN_12, */ |
| {13, true} |
| , /* RF_CHAN_13, */ |
| {14, true} |
| , /* RF_CHAN_14, */ |
| {240, true} |
| , /* RF_CHAN_240, */ |
| {244, true} |
| , /* RF_CHAN_244, */ |
| {248, true} |
| , /* RF_CHAN_248, */ |
| {252, true} |
| , /* RF_CHAN_252, */ |
| {208, true} |
| , /* RF_CHAN_208, */ |
| {212, true} |
| , /* RF_CHAN_212, */ |
| {216, true} |
| , /* RF_CHAN_216, */ |
| {36, true} |
| , /* RF_CHAN_36, */ |
| {40, true} |
| , /* RF_CHAN_40, */ |
| {44, true} |
| , /* RF_CHAN_44, */ |
| {48, true} |
| , /* RF_CHAN_48, */ |
| {52, true} |
| , /* RF_CHAN_52, */ |
| {56, true} |
| , /* RF_CHAN_56, */ |
| {60, true} |
| , /* RF_CHAN_60, */ |
| {64, true} |
| , /* RF_CHAN_64, */ |
| {100, true} |
| , /* RF_CHAN_100, */ |
| {104, true} |
| , /* RF_CHAN_104, */ |
| {108, true} |
| , /* RF_CHAN_108, */ |
| {112, true} |
| , /* RF_CHAN_112, */ |
| {116, true} |
| , /* RF_CHAN_116, */ |
| {120, true} |
| , /* RF_CHAN_120, */ |
| {124, true} |
| , /* RF_CHAN_124, */ |
| {128, true} |
| , /* RF_CHAN_128, */ |
| {132, true} |
| , /* RF_CHAN_132, */ |
| {136, true} |
| , /* RF_CHAN_136, */ |
| {140, true} |
| , /* RF_CHAN_140, */ |
| {144, true} |
| , /* RF_CHAN_144, */ |
| {149, true} |
| , /* RF_CHAN_149, */ |
| {153, true} |
| , /* RF_CHAN_153, */ |
| {157, true} |
| , /* RF_CHAN_157, */ |
| {161, true} |
| , /* RF_CHAN_161, */ |
| {165, true} |
| , /* RF_CHAN_165, */ |
| }; |
| #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_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. |
| */ |
| 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 |
| */ |
| 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 = (node->BssDescriptor.length + |
| sizeof(uint16_t) + sizeof(uint32_t) - |
| sizeof(tSirBssDescription)); |
| 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) |
| continue; |
| |
| sap_ctx->sap_detected_avoid_ch_ie.present = 1; |
| CDF_TRACE(CDF_MODULE_ID_SAP, |
| CDF_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 |
| ============================================================================*/ |
| #ifdef CONFIG_CNSS |
| void sap_update_unsafe_channel_list(ptSapContext pSapCtx) |
| { |
| uint16_t i, j; |
| uint16_t unsafe_channel_list[NUM_20MHZ_RF_CHANNELS]; |
| uint16_t unsafe_channel_count = 0; |
| |
| /* Flush, default set all channel safe */ |
| for (i = 0; i < NUM_20MHZ_RF_CHANNELS; i++) { |
| safe_channels[i].isSafe = true; |
| } |
| |
| /* Try to find unsafe channel */ |
| #if defined(FEATURE_WLAN_STA_AP_MODE_DFS_DISABLE) || \ |
| defined(WLAN_FEATURE_MBSSID) |
| for (i = 0; i < NUM_20MHZ_RF_CHANNELS; i++) { |
| if (pSapCtx->dfs_ch_disable == true) { |
| if (CDS_IS_DFS_CH(safe_channels[i].channelNumber)) { |
| safe_channels[i].isSafe = false; |
| CDF_TRACE(CDF_MODULE_ID_SAP, |
| CDF_TRACE_LEVEL_INFO_HIGH, |
| "%s: DFS Ch %d is not safe in" |
| " Concurrent mode", |
| __func__, |
| safe_channels[i].channelNumber); |
| } |
| } |
| } |
| #endif |
| |
| cnss_get_wlan_unsafe_channel(unsafe_channel_list, |
| &unsafe_channel_count, |
| sizeof(unsafe_channel_list)); |
| |
| for (i = 0; i < unsafe_channel_count; i++) { |
| for (j = 0; j < NUM_20MHZ_RF_CHANNELS; j++) { |
| if (safe_channels[j].channelNumber == |
| unsafe_channel_list[i]) { |
| /* Found unsafe channel, update it */ |
| safe_channels[j].isSafe = false; |
| CDF_TRACE(CDF_MODULE_ID_SAP, |
| CDF_TRACE_LEVEL_ERROR, |
| FL("CH %d is not safe"), |
| unsafe_channel_list[i]); |
| break; |
| } |
| } |
| } |
| |
| return; |
| } |
| #else |
| void sap_update_unsafe_channel_list(ptSapContext pSapCtx) |
| { |
| CDF_TRACE(CDF_MODULE_ID_SAP, CDF_TRACE_LEVEL_ERROR, |
| "%s: Not implemented", __func__); |
| return; |
| } |
| #endif |
| |
| #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( |
| #ifdef WLAN_FEATURE_MBSSID |
| void *p_cds_gctx |
| #else |
| void |
| #endif |
| ) { |
| #ifndef WLAN_FEATURE_MBSSID |
| void *p_cds_gctx = cds_get_global_context(); |
| #endif |
| ptSapContext pSapCtx; |
| |
| CDF_TRACE(CDF_MODULE_ID_SAP, CDF_TRACE_LEVEL_INFO, |
| "Cleaning up the channel list structure"); |
| |
| if (NULL == p_cds_gctx) { |
| CDF_TRACE(CDF_MODULE_ID_SAP, CDF_TRACE_LEVEL_FATAL, |
| "SAP Global Context is NULL"); |
| return; |
| } |
| |
| pSapCtx = CDS_GET_SAP_CB(p_cds_gctx); |
| if (NULL == pSapCtx) { |
| CDF_TRACE(CDF_MODULE_ID_SAP, CDF_TRACE_LEVEL_FATAL, |
| "SAP Context is NULL"); |
| return; |
| } |
| |
| pSapCtx->SapChnlList.numChannel = 0; |
| if (pSapCtx->SapChnlList.channelList) { |
| cdf_mem_free(pSapCtx->SapChnlList.channelList); |
| pSapCtx->SapChnlList.channelList = NULL; |
| } |
| |
| pSapCtx->SapAllChnlList.numChannel = 0; |
| if (pSapCtx->SapAllChnlList.channelList) { |
| cdf_mem_free(pSapCtx->SapAllChnlList.channelList); |
| pSapCtx->SapAllChnlList.channelList = NULL; |
| } |
| } |
| |
| /** |
| * 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 |
| */ |
| 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; |
| |
| /* Select the best channel from allowed list */ |
| for (i = 0; i < sap_ctx->acs_cfg->ch_list_count; i++) { |
| if (sap_ctx->acs_cfg->ch_list[i] == best_chnl) { |
| CDF_TRACE(CDF_MODULE_ID_SAP, |
| CDF_TRACE_LEVEL_INFO_HIGH, |
| "Best channel 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 |
| ============================================================================*/ |
| 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; |
| |
| CDF_TRACE(CDF_MODULE_ID_SAP, CDF_TRACE_LEVEL_INFO_HIGH, "In %s", |
| __func__); |
| |
| pSpectInfoParams->numSpectChans = |
| pMac->scan.base_channels.numChannels; |
| |
| /* Allocate memory for weight computation of 2.4GHz */ |
| pSpectCh = |
| (tSapSpectChInfo *) cdf_mem_malloc((pSpectInfoParams->numSpectChans) |
| * sizeof(*pSpectCh)); |
| |
| if (pSpectCh == NULL) { |
| CDF_TRACE(CDF_MODULE_ID_SAP, CDF_TRACE_LEVEL_ERROR, |
| "In %s, CDF_MALLOC_ERR", __func__); |
| return eSAP_FALSE; |
| } |
| |
| cdf_mem_zero(pSpectCh, |
| (pSpectInfoParams->numSpectChans) * sizeof(*pSpectCh)); |
| |
| /* 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) || defined(WLAN_FEATURE_MBSSID) |
| 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) |
| include_dfs_ch = false; |
| |
| /* Fill the channel number in the spectrum in the operating freq band */ |
| for (channelnum = 0; |
| channelnum < pSpectInfoParams->numSpectChans; |
| channelnum++, pChans++) { |
| chSafe = true; |
| |
| /* check if the channel is in NOL blacklist */ |
| if (sap_dfs_is_channel_in_nol_list(pSapCtx, *pChans, |
| PHY_SINGLE_CHANNEL_CENTERED)) { |
| CDF_TRACE(CDF_MODULE_ID_SAP, CDF_TRACE_LEVEL_INFO_HIGH, |
| "In %s, Ch %d is in NOL list", __func__, |
| *pChans); |
| chSafe = false; |
| continue; |
| } |
| |
| if (include_dfs_ch == false) { |
| if (CDS_IS_DFS_CH(*pChans)) { |
| chSafe = false; |
| CDF_TRACE(CDF_MODULE_ID_SAP, |
| CDF_TRACE_LEVEL_INFO_HIGH, |
| "In %s, DFS Ch %d not considered for ACS", |
| __func__, *pChans); |
| continue; |
| } |
| } |
| |
| #ifdef FEATURE_WLAN_CH_AVOID |
| for (i = 0; i < NUM_20MHZ_RF_CHANNELS; i++) { |
| if ((safe_channels[i].channelNumber == *pChans) && |
| (false == safe_channels[i].isSafe)) { |
| CDF_TRACE(CDF_MODULE_ID_SAP, |
| CDF_TRACE_LEVEL_INFO_HIGH, |
| "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) { |
| pSpectCh++; |
| continue; |
| } |
| |
| if (true == chSafe) { |
| pSpectCh->chNum = *pChans; |
| pSpectCh->valid = eSAP_TRUE; |
| pSpectCh->rssiAgr = SOFTAP_MIN_RSSI; /* Initialise for all channels */ |
| pSpectCh->channelWidth = SOFTAP_HT20_CHANNELWIDTH; /* Initialise 20MHz for all the Channels */ |
| } |
| pSpectCh++; |
| } |
| return eSAP_TRUE; |
| } |
| |
| /*========================================================================== |
| FUNCTION sapweight_rssi_count |
| |
| DESCRIPTION |
| Function weightRssiCount calculates the channel weight due to rssi |
| and data count(here number of BSS observed) |
| |
| DEPENDENCIES |
| NA. |
| |
| PARAMETERS |
| |
| IN |
| rssi : Max signal strength receieved from a BSS for the channel |
| count : Number of BSS observed in the channel |
| |
| RETURN VALUE |
| uint32_t : Calculated channel weight based on above two |
| |
| SIDE EFFECTS |
| ============================================================================*/ |
| uint32_t sapweight_rssi_count(int8_t rssi, uint16_t count) |
| { |
| int32_t rssiWeight = 0; |
| int32_t countWeight = 0; |
| uint32_t rssicountWeight = 0; |
| |
| /* Weight from RSSI */ |
| rssiWeight = SOFTAP_RSSI_WEIGHT * (rssi - SOFTAP_MIN_RSSI) |
| / (SOFTAP_MAX_RSSI - SOFTAP_MIN_RSSI); |
| |
| if (rssiWeight > SOFTAP_RSSI_WEIGHT) |
| rssiWeight = SOFTAP_RSSI_WEIGHT; |
| else if (rssiWeight < 0) |
| rssiWeight = 0; |
| |
| /* Weight from data count */ |
| countWeight = SOFTAP_COUNT_WEIGHT * (count - SOFTAP_MIN_COUNT) |
| / (SOFTAP_MAX_COUNT - SOFTAP_MIN_COUNT); |
| |
| if (countWeight > SOFTAP_COUNT_WEIGHT) |
| countWeight = SOFTAP_COUNT_WEIGHT; |
| |
| rssicountWeight = rssiWeight + countWeight; |
| |
| CDF_TRACE(CDF_MODULE_ID_SAP, CDF_TRACE_LEVEL_INFO_HIGH, |
| "In %s, rssiWeight=%d, countWeight=%d, rssicountWeight=%d", |
| __func__, rssiWeight, countWeight, rssicountWeight); |
| |
| return rssicountWeight; |
| } |
| |
| /** |
| * 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 |
| * |
| * sap_update_rssi_bsscount updates bss count and rssi effect based |
| * on the channel offset. |
| * |
| * Return: None. |
| */ |
| |
| void sap_update_rssi_bsscount(tSapSpectChInfo *pSpectCh, int32_t offset, |
| bool sap_24g) |
| { |
| tSapSpectChInfo *pExtSpectCh = NULL; |
| int32_t rssi, rsssi_effect; |
| |
| pExtSpectCh = (pSpectCh + offset); |
| if (pExtSpectCh != NULL) { |
| ++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_24GHZ_FOURTH_OVERLAP_CHAN_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. |
| */ |
| |
| void sap_upd_chan_spec_params(tSirProbeRespBeacon *pBeaconStruct, |
| uint16_t *channelWidth, |
| uint16_t *secondaryChannelOffset, |
| uint16_t *vhtSupport, |
| uint16_t *centerFreq) |
| { |
| if (NULL == pBeaconStruct) { |
| CDF_TRACE(CDF_MODULE_ID_SAP, CDF_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) { |
| *vhtSupport = pBeaconStruct->VHTOperation.present; |
| if (pBeaconStruct->VHTOperation.chanWidth > |
| WNI_CFG_VHT_CHANNEL_WIDTH_20_40MHZ) { |
| *channelWidth = eHT_CHANNEL_WIDTH_80MHZ; |
| *centerFreq = pBeaconStruct->VHTOperation. |
| chanCenterFreqSeg1; |
| } |
| } |
| } |
| } |
| |
| /** |
| * 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 |
| * |
| * sap_interference_rssi_count_5G considers the Adjacent channel rssi |
| * and data count(here number of BSS observed) |
| * |
| * Return: NA. |
| */ |
| |
| void sap_interference_rssi_count_5G(tSapSpectChInfo *spect_ch, |
| uint16_t chan_width, |
| uint16_t sec_chan_offset, |
| uint16_t center_freq, uint8_t channel_id) |
| { |
| if (NULL == spect_ch) { |
| CDF_TRACE(CDF_MODULE_ID_SAP, CDF_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 |
| */ |
| |
| 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); |
| break; |
| |
| /* Below the Primary channel */ |
| case PHY_DOUBLE_CHANNEL_HIGH_PRIMARY: |
| sap_update_rssi_bsscount(spect_ch, -1, false); |
| break; |
| } |
| break; |
| case eHT_CHANNEL_WIDTH_80MHZ: /* VHT80 */ |
| if ((center_freq - channel_id) == 6) { |
| sap_update_rssi_bsscount(spect_ch, 1, false); |
| sap_update_rssi_bsscount(spect_ch, 2, false); |
| sap_update_rssi_bsscount(spect_ch, 3, false); |
| } else if ((center_freq - channel_id) == 2) { |
| sap_update_rssi_bsscount(spect_ch, -1, false); |
| sap_update_rssi_bsscount(spect_ch, 1, false); |
| sap_update_rssi_bsscount(spect_ch, 2, false); |
| } else if ((center_freq - channel_id) == -2) { |
| sap_update_rssi_bsscount(spect_ch, -2, false); |
| sap_update_rssi_bsscount(spect_ch, -1, false); |
| sap_update_rssi_bsscount(spect_ch, 1, false); |
| } else if ((center_freq - channel_id) == -6) { |
| sap_update_rssi_bsscount(spect_ch, -1, false); |
| sap_update_rssi_bsscount(spect_ch, -2, false); |
| sap_update_rssi_bsscount(spect_ch, -3, false); |
| } |
| break; |
| default: |
| break; |
| } |
| } |
| |
| /** |
| * 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 |
| * |
| * sap_interference_rssi_count considers the Adjacent channel rssi |
| * and data count(here number of BSS observed) |
| * |
| * Return: None. |
| */ |
| |
| void sap_interference_rssi_count(tSapSpectChInfo *spect_ch) |
| { |
| if (NULL == spect_ch) { |
| CDF_TRACE(CDF_MODULE_ID_SAP, CDF_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); |
| sap_update_rssi_bsscount(spect_ch, 2, true); |
| sap_update_rssi_bsscount(spect_ch, 3, true); |
| sap_update_rssi_bsscount(spect_ch, 4, true); |
| break; |
| |
| case CHANNEL_2: |
| sap_update_rssi_bsscount(spect_ch, -1, true); |
| sap_update_rssi_bsscount(spect_ch, 1, true); |
| sap_update_rssi_bsscount(spect_ch, 2, true); |
| sap_update_rssi_bsscount(spect_ch, 3, true); |
| sap_update_rssi_bsscount(spect_ch, 4, true); |
| break; |
| case CHANNEL_3: |
| sap_update_rssi_bsscount(spect_ch, -2, true); |
| sap_update_rssi_bsscount(spect_ch, -1, true); |
| sap_update_rssi_bsscount(spect_ch, 1, true); |
| sap_update_rssi_bsscount(spect_ch, 2, true); |
| sap_update_rssi_bsscount(spect_ch, 3, true); |
| sap_update_rssi_bsscount(spect_ch, 4, true); |
| break; |
| case CHANNEL_4: |
| sap_update_rssi_bsscount(spect_ch, -3, true); |
| sap_update_rssi_bsscount(spect_ch, -2, true); |
| sap_update_rssi_bsscount(spect_ch, -1, true); |
| sap_update_rssi_bsscount(spect_ch, 1, true); |
| sap_update_rssi_bsscount(spect_ch, 2, true); |
| sap_update_rssi_bsscount(spect_ch, 3, true); |
| sap_update_rssi_bsscount(spect_ch, 4, true); |
| 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); |
| sap_update_rssi_bsscount(spect_ch, -3, true); |
| sap_update_rssi_bsscount(spect_ch, -2, true); |
| sap_update_rssi_bsscount(spect_ch, -1, true); |
| sap_update_rssi_bsscount(spect_ch, 1, true); |
| sap_update_rssi_bsscount(spect_ch, 2, true); |
| sap_update_rssi_bsscount(spect_ch, 3, true); |
| sap_update_rssi_bsscount(spect_ch, 4, true); |
| break; |
| |
| case CHANNEL_11: |
| sap_update_rssi_bsscount(spect_ch, -4, true); |
| sap_update_rssi_bsscount(spect_ch, -3, true); |
| sap_update_rssi_bsscount(spect_ch, -2, true); |
| sap_update_rssi_bsscount(spect_ch, -1, true); |
| sap_update_rssi_bsscount(spect_ch, 1, true); |
| sap_update_rssi_bsscount(spect_ch, 2, true); |
| sap_update_rssi_bsscount(spect_ch, 3, true); |
| break; |
| |
| case CHANNEL_12: |
| sap_update_rssi_bsscount(spect_ch, -4, true); |
| sap_update_rssi_bsscount(spect_ch, -3, true); |
| sap_update_rssi_bsscount(spect_ch, -2, true); |
| sap_update_rssi_bsscount(spect_ch, -1, true); |
| sap_update_rssi_bsscount(spect_ch, 1, true); |
| sap_update_rssi_bsscount(spect_ch, 2, true); |
| break; |
| |
| case CHANNEL_13: |
| sap_update_rssi_bsscount(spect_ch, -4, true); |
| sap_update_rssi_bsscount(spect_ch, -3, true); |
| sap_update_rssi_bsscount(spect_ch, -2, true); |
| sap_update_rssi_bsscount(spect_ch, -1, true); |
| sap_update_rssi_bsscount(spect_ch, 1, true); |
| break; |
| |
| case CHANNEL_14: |
| sap_update_rssi_bsscount(spect_ch, -4, true); |
| sap_update_rssi_bsscount(spect_ch, -3, true); |
| sap_update_rssi_bsscount(spect_ch, -2, true); |
| sap_update_rssi_bsscount(spect_ch, -1, true); |
| break; |
| |
| default: |
| break; |
| } |
| } |
| |
| /*========================================================================== |
| Function ch_in_pcl |
| |
| Description |
| Check if a channel is in the preferred channel list |
| |
| Parameters |
| sap_ctx SAP context pointer |
| channel input channel number |
| |
| Return Value |
| true: channel is in PCL |
| false: channel is not in PCL |
| ==========================================================================*/ |
| 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; |
| } |
| |
| /*========================================================================== |
| FUNCTION sap_compute_spect_weight |
| |
| DESCRIPTION |
| Main function for computing the weight of each channel in the |
| spectrum based on the RSSI value of the BSSes on the channel |
| and number of BSS |
| |
| DEPENDENCIES |
| NA. |
| |
| PARAMETERS |
| |
| IN |
| pSpectInfoParams : Pointer to the tSpectInfoParams structure |
| halHandle : Pointer to HAL handle |
| pResult : Pointer to tScanResultHandle |
| |
| RETURN VALUE |
| void : NULL |
| |
| SIDE EFFECTS |
| ============================================================================*/ |
| void 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 vhtSupport; |
| uint32_t ieLen = 0; |
| tSirProbeRespBeacon *pBeaconStruct; |
| tpAniSirGlobal pMac = (tpAniSirGlobal) halHandle; |
| |
| pBeaconStruct = cdf_mem_malloc(sizeof(tSirProbeRespBeacon)); |
| if (NULL == pBeaconStruct) { |
| CDF_TRACE(CDF_MODULE_ID_SAP, CDF_TRACE_LEVEL_INFO_HIGH, |
| "Unable to allocate memory in sap_compute_spect_weight\n"); |
| return; |
| } |
| CDF_TRACE(CDF_MODULE_ID_SAP, CDF_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; |
| |
| if (pScanResult->BssDescriptor.ieFields != NULL) { |
| ieLen = |
| (pScanResult->BssDescriptor.length + |
| sizeof(uint16_t) + sizeof(uint32_t) - |
| sizeof(tSirBssDescription)); |
| cdf_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, ¢erFreq); |
| } |
| } |
| /* 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, |
| channel_id); |
| break; |
| |
| case eCSR_DOT11_MODE_11g: |
| sap_interference_rssi_count(pSpectCh); |
| break; |
| |
| case eCSR_DOT11_MODE_abg: |
| sap_interference_rssi_count_5G( |
| pSpectCh, channelWidth, |
| secondaryChannelOffset, centerFreq, |
| channel_id); |
| sap_interference_rssi_count(pSpectCh); |
| break; |
| } |
| |
| CDF_TRACE(CDF_MODULE_ID_SAP, |
| CDF_TRACE_LEVEL_INFO_HIGH, |
| "In %s, bssdes.ch_self=%d, bssdes.ch_ID=%d, bssdes.rssi=%d, SpectCh.bssCount=%d, pScanResult=%p, ChannelWidth %d, secondaryChanOffset %d, center frequency %d \n", |
| __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; |
| |
| CDF_TRACE(CDF_MODULE_ID_SAP, CDF_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; |
| |
| pSpectCh->weight = |
| SAPDFS_NORMALISE_1000 * sapweight_rssi_count(rssi, |
| pSpectCh-> |
| bssCount); |
| pSpectCh->weight_copy = pSpectCh->weight; |
| |
| /* ------ Debug Info ------ */ |
| CDF_TRACE(CDF_MODULE_ID_SAP, CDF_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++; |
| } |
| cdf_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 |
| ============================================================================*/ |
| void sap_chan_sel_exit(tSapChSelSpectInfo *pSpectInfoParams) |
| { |
| /* Free all the allocated memory */ |
| cdf_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 |
| ============================================================================*/ |
| 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; |
| } |
| } |
| if (minWeightIndex != i) { |
| cdf_mem_copy(&temp, &pSpectCh[minWeightIndex], |
| sizeof(*pSpectCh)); |
| cdf_mem_copy(&pSpectCh[minWeightIndex], &pSpectCh[i], |
| sizeof(*pSpectCh)); |
| cdf_mem_copy(&pSpectCh[i], &temp, sizeof(*pSpectCh)); |
| } |
| } |
| } |
| |
| /** |
| * 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 |
| */ |
| void sap_sort_chl_weight_ht80(tSapChSelSpectInfo *pSpectInfoParams) |
| { |
| uint8_t i, j, n; |
| tSapSpectChInfo *pSpectInfo; |
| uint8_t minIdx; |
| |
| 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; |
| } |
| |
| pSpectInfo = pSpectInfoParams->pSpectCh; |
| for (j = 0; j < pSpectInfoParams->numSpectChans; j++) { |
| if (CHANNEL_165 == pSpectInfo[j].chNum) { |
| pSpectInfo[j].weight = SAP_ACS_WEIGHT_MAX * 4; |
| break; |
| } |
| } |
| |
| pSpectInfo = pSpectInfoParams->pSpectCh; |
| for (j = 0; j < (pSpectInfoParams->numSpectChans); j++) { |
| CDF_TRACE(CDF_MODULE_ID_SAP, CDF_TRACE_LEVEL_INFO_HIGH, |
| FL("Channel=%d Weight= %d rssi=%d bssCount=%d"), |
| pSpectInfo->chNum, pSpectInfo->weight, |
| pSpectInfo->rssiAgr, pSpectInfo->bssCount); |
| pSpectInfo++; |
| } |
| } |
| |
| /** |
| * 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 |
| */ |
| void sap_sort_chl_weight_ht40_24_g(tSapChSelSpectInfo *pSpectInfoParams) |
| { |
| uint8_t i, j; |
| tSapSpectChInfo *pSpectInfo; |
| uint32_t tmpWeight1, tmpWeight2; |
| |
| 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 + |
| pSpectInfo[j + 4].weight; |
| if (pSpectInfo[j].weight <= |
| pSpectInfo[j + 4].weight) { |
| 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; |
| } |
| } |
| } |
| } |
| |
| /*========================================================================== |
| 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 |
| ============================================================================*/ |
| 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; |
| } |
| |
| /* 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++) { |
| CDF_TRACE(CDF_MODULE_ID_SAP, CDF_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 |
| ============================================================================*/ |
| 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: |
| if (eCSR_DOT11_MODE_11g == operatingBand) |
| sap_sort_chl_weight_ht40_24_g(pSpectInfoParams); |
| else if (eCSR_DOT11_MODE_11a == operatingBand) |
| sap_sort_chl_weight_ht40_5_g(pSpectInfoParams); |
| else { |
| sap_sort_chl_weight_ht40_24_g(pSpectInfoParams); |
| sap_sort_chl_weight_ht40_5_g(pSpectInfoParams); |
| } |
| sap_sort_chl_weight(pSpectInfoParams); |
| break; |
| |
| case CH_WIDTH_80MHZ: |
| sap_sort_chl_weight_ht80(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) { |
| cdf_mem_copy(&temp, &pSpectCh[minWeightIndex], |
| sizeof(*pSpectCh)); |
| cdf_mem_copy(&pSpectCh[minWeightIndex], &pSpectCh[i], |
| sizeof(*pSpectCh)); |
| cdf_mem_copy(&pSpectCh[i], &temp, sizeof(*pSpectCh)); |
| } |
| } |
| #endif |
| |
| /* For testing */ |
| CDF_TRACE(CDF_MODULE_ID_SAP, CDF_TRACE_LEVEL_INFO_HIGH, |
| "In %s, Sorted Spectrum Channels Weight", __func__); |
| pSpectCh = pSpectInfoParams->pSpectCh; |
| for (j = 0; j < (pSpectInfoParams->numSpectChans); j++) { |
| CDF_TRACE(CDF_MODULE_ID_SAP, CDF_TRACE_LEVEL_INFO_HIGH, |
| "In %s, Channel=%d Weight= %d rssi=%d bssCount=%d", |
| __func__, pSpectCh->chNum, pSpectCh->weight, |
| pSpectCh->rssiAgr, pSpectCh->bssCount); |
| pSpectCh++; |
| } |
| |
| } |
| |
| /*========================================================================== |
| FUNCTION sap_filter_over_lap_ch |
| |
| DESCRIPTION |
| return true if ch is acceptable. |
| This function will decide if we will filter over lap channel or not. |
| |
| DEPENDENCIES |
| shall called after ap start. |
| |
| PARAMETERS |
| |
| IN |
| pSapCtx : Pointer to ptSapContext. |
| chNum : Filter channel number. |
| |
| RETURN VALUE |
| bool : true if channel is accepted. |
| |
| SIDE EFFECTS |
| ============================================================================*/ |
| bool sap_filter_over_lap_ch(ptSapContext pSapCtx, uint16_t chNum) |
| { |
| if (pSapCtx->enableOverLapCh) |
| return eSAP_TRUE; |
| else if ((chNum == CHANNEL_1) || |
| (chNum == CHANNEL_6) || (chNum == CHANNEL_11)) |
| return eSAP_TRUE; |
| |
| return eSAP_FALSE; |
| } |
| |
| /*========================================================================== |
| FUNCTION sap_select_channel |
| |
| DESCRIPTION |
| Runs a algorithm to select the best channel to operate in based on BSS |
| rssi and bss count on each channel |
| |
| DEPENDENCIES |
| NA. |
| |
| PARAMETERS |
| |
| IN |
| halHandle : Pointer to HAL handle |
| pResult : Pointer to tScanResultHandle |
| |
| RETURN VALUE |
| uint8_t : Success - channel number, Fail - zero |
| |
| SIDE EFFECTS |
| ============================================================================*/ |
| uint8_t sap_select_channel(tHalHandle halHandle, ptSapContext pSapCtx, |
| tScanResultHandle pScanResult) |
| { |
| /* DFS param object holding all the data req by the algo */ |
| tSapChSelSpectInfo oSpectInfoParams = { NULL, 0 }; |
| tSapChSelSpectInfo *pSpectInfoParams = &oSpectInfoParams; /* Memory? NB */ |
| uint8_t bestChNum = SAP_CHANNEL_NOT_SELECTED; |
| #ifdef FEATURE_WLAN_CH_AVOID |
| uint8_t i; |
| uint8_t firstSafeChannelInRange = SAP_CHANNEL_NOT_SELECTED; |
| #endif |
| #ifdef SOFTAP_CHANNEL_RANGE |
| uint32_t startChannelNum; |
| uint32_t endChannelNum; |
| uint32_t operatingBand = 0; |
| uint32_t tmpChNum; |
| uint8_t count; |
| #endif |
| CDF_TRACE(CDF_MODULE_ID_SAP, CDF_TRACE_LEVEL_INFO_HIGH, |
| "In %s, Running SAP Ch Select", __func__); |
| |
| #ifdef FEATURE_WLAN_CH_AVOID |
| sap_update_unsafe_channel_list(pSapCtx); |
| #endif |
| |
| if (NULL == pScanResult) { |
| CDF_TRACE(CDF_MODULE_ID_SAP, CDF_TRACE_LEVEL_INFO_HIGH, |
| "%s: No external AP present\n", __func__); |
| |
| #ifndef SOFTAP_CHANNEL_RANGE |
| return bestChNum; |
| #else |
| startChannelNum = pSapCtx->acs_cfg->start_ch; |
| endChannelNum = pSapCtx->acs_cfg->end_ch; |
| |
| |
| CDF_TRACE(CDF_MODULE_ID_SAP, CDF_TRACE_LEVEL_INFO_HIGH, |
| "%s: start - end: %d - %d\n", __func__, |
| startChannelNum, endChannelNum); |
| |
| #ifndef FEATURE_WLAN_CH_AVOID /* FEATURE_WLAN_CH_AVOID NOT defined case */ |
| pSapCtx->acs_cfg->pri_ch = startChannelNum; |
| pSapCtx->acs_cfg->ht_sec_ch = 0; |
| /* pick the first channel in configured range */ |
| return startChannelNum; |
| #else /* FEATURE_WLAN_CH_AVOID defined */ |
| |
| /* get a channel in PCL and within the range */ |
| for (i = 0; i < pSapCtx->acs_cfg->pcl_ch_count; i++) { |
| if ((pSapCtx->acs_cfg->pcl_channels[i] >= |
| startChannelNum) |
| && (pSapCtx->acs_cfg->pcl_channels[i] <= |
| endChannelNum)) { |
| firstSafeChannelInRange = |
| pSapCtx->acs_cfg->pcl_channels[i]; |
| break; |
| } |
| } |
| if (SAP_CHANNEL_NOT_SELECTED != firstSafeChannelInRange) |
| return firstSafeChannelInRange; |
| |
| for (i = 0; i < NUM_20MHZ_RF_CHANNELS; i++) { |
| if ((safe_channels[i].channelNumber >= startChannelNum) |
| && (safe_channels[i].channelNumber <= |
| endChannelNum)) { |
| CHANNEL_STATE channel_type = |
| cds_get_channel_state(safe_channels[i]. |
| channelNumber); |
| |
| if ((channel_type == CHANNEL_STATE_DISABLE) || |
| (channel_type == CHANNEL_STATE_INVALID)) |
| continue; |
| |
| if (safe_channels[i].isSafe == true) { |
| CDF_TRACE(CDF_MODULE_ID_SAP, |
| CDF_TRACE_LEVEL_INFO_HIGH, |
| "%s: channel %d in the configuration is safe\n", |
| __func__, |
| safe_channels[i]. |
| channelNumber); |
| firstSafeChannelInRange = |
| safe_channels[i].channelNumber; |
| break; |
| } |
| |
| CDF_TRACE(CDF_MODULE_ID_SAP, |
| CDF_TRACE_LEVEL_INFO_HIGH, |
| "%s: channel %d in the configuration is unsafe\n", |
| __func__, |
| safe_channels[i].channelNumber); |
| } |
| } |
| |
| /* if no channel selected return SAP_CHANNEL_NOT_SELECTED */ |
| return firstSafeChannelInRange; |
| #endif /* !FEATURE_WLAN_CH_AVOID */ |
| #endif /* SOFTAP_CHANNEL_RANGE */ |
| } |
| |
| /* Initialize the structure pointed by pSpectInfoParams */ |
| if (sap_chan_sel_init(halHandle, pSpectInfoParams, pSapCtx) != eSAP_TRUE) { |
| CDF_TRACE(CDF_MODULE_ID_SAP, CDF_TRACE_LEVEL_ERROR, |
| "In %s, Ch Select initialization failed", __func__); |
| return SAP_CHANNEL_NOT_SELECTED; |
| } |
| /* Compute the weight of the entire spectrum in the operating band */ |
| sap_compute_spect_weight(pSpectInfoParams, halHandle, pScanResult, |
| pSapCtx); |
| |
| #ifdef FEATURE_AP_MCC_CH_AVOIDANCE |
| /* process avoid channel IE to collect all channels to avoid */ |
| sap_process_avoid_ie(halHandle, pSapCtx, pScanResult, pSpectInfoParams); |
| #endif /* FEATURE_AP_MCC_CH_AVOIDANCE */ |
| |
| #ifdef SOFTAP_CHANNEL_RANGE |
| startChannelNum = pSapCtx->acs_cfg->start_ch; |
| endChannelNum = pSapCtx->acs_cfg->end_ch; |
| SET_ACS_BAND(operatingBand, pSapCtx); |
| |
| pSapCtx->acsBestChannelInfo.channelNum = 0; |
| pSapCtx->acsBestChannelInfo.weight = SAP_ACS_WEIGHT_MAX; |
| |
| /* Sort the channel list as per the computed weights, lesser weight first. */ |
| sap_sort_chl_weight_all(pSapCtx, pSpectInfoParams, operatingBand); |
| |
| /*Loop till get the best channel in the given range */ |
| for (count = 0; count < pSpectInfoParams->numSpectChans; count++) { |
| if ((startChannelNum <= pSpectInfoParams->pSpectCh[count].chNum) |
| && (endChannelNum >= |
| pSpectInfoParams->pSpectCh[count].chNum)) { |
| if (bestChNum == SAP_CHANNEL_NOT_SELECTED) { |
| bestChNum = |
| pSpectInfoParams->pSpectCh[count].chNum; |
| /* check if bestChNum is in preferred channel list */ |
| bestChNum = |
| sap_select_preferred_channel_from_channel_list |
| (bestChNum, pSapCtx, pSpectInfoParams); |
| if (bestChNum == SAP_CHANNEL_NOT_SELECTED) { |
| /* not in preferred channel list, go to next best channel */ |
| 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(pSapCtx, |
| bestChNum)) { |
| bestChNum = SAP_CHANNEL_NOT_SELECTED; |
| continue; |
| } |
| #endif |
| |
| pSapCtx->acsBestChannelInfo.channelNum = |
| bestChNum; |
| pSapCtx->acsBestChannelInfo.weight = |
| pSpectInfoParams-> |
| pSpectCh[count]. |
| weight_copy; |
| } |
| |
| if (bestChNum != SAP_CHANNEL_NOT_SELECTED) { |
| if (operatingBand == eCSR_DOT11_MODE_11g) { |
| /* Give preference to Non-overlap channels */ |
| if (sap_filter_over_lap_ch(pSapCtx, |
| pSpectInfoParams-> |
| pSpectCh[count]. |
| chNum)) { |
| tmpChNum = |
| pSpectInfoParams-> |
| pSpectCh[count].chNum; |
| tmpChNum = |
| sap_select_preferred_channel_from_channel_list |
| (tmpChNum, pSapCtx, |
| pSpectInfoParams); |
| if (tmpChNum != |
| SAP_CHANNEL_NOT_SELECTED) { |
| bestChNum = tmpChNum; |
| break; |
| } |
| } |
| } |
| } |
| } |
| } |
| #else |
| /* Sort the channel list as per the computed weights, lesser weight first. */ |
| sap_sort_chl_weight_all(pSapCtx, halHandle, pSpectInfoParams); |
| /* Get the first channel in sorted array as best 20M Channel */ |
| bestChNum = (uint8_t) pSpectInfoParams->pSpectCh[0].chNum; |
| /* Select Best Channel from Channel List if Configured */ |
| bestChNum = sap_select_preferred_channel_from_channel_list(bestChNum, |
| pSapCtx, |
| pSpectInfoParams); |
| #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 < pSpectInfoParams->numSpectChans; count++) { |
| /** check if a pcl channel has the same weightage |
| * as the best channel |
| */ |
| if (ch_in_pcl(pSapCtx, pSpectInfoParams->pSpectCh[count].chNum) |
| && (pSpectInfoParams->pSpectCh[count].weight == |
| pSapCtx->acsBestChannelInfo.weight)) { |
| if (sap_select_preferred_channel_from_channel_list( |
| pSpectInfoParams->pSpectCh[count].chNum, |
| pSapCtx, pSpectInfoParams) == |
| SAP_CHANNEL_NOT_SELECTED) |
| continue; |
| |
| #ifdef FEATURE_AP_MCC_CH_AVOIDANCE |
| if (sap_check_in_avoid_ch_list(pSapCtx, bestChNum)) |
| continue; |
| #endif |
| bestChNum = pSpectInfoParams->pSpectCh[count].chNum; |
| CDF_TRACE(CDF_MODULE_ID_SAP, |
| CDF_TRACE_LEVEL_INFO_HIGH, |
| "change best channel to %d in PCL", |
| bestChNum); |
| break; |
| } |
| } |
| |
| pSapCtx->acs_cfg->pri_ch = bestChNum; |
| /* determine secondary channel for 2.4G channel 5, 6, 7 in HT40 */ |
| if ((operatingBand == eCSR_DOT11_MODE_11g) && |
| (pSapCtx->acs_cfg->ch_width == CH_WIDTH_40MHZ)) { |
| if ((bestChNum >= 5) && (bestChNum <= 7)) { |
| int weight_below, weight_above, i; |
| tSapSpectChInfo *pspect_info; |
| |
| weight_below = weight_above = SAP_ACS_WEIGHT_MAX; |
| pspect_info = pSpectInfoParams->pSpectCh; |
| for (i = 0; i < pSpectInfoParams->numSpectChans; |
| i++) { |
| if (pspect_info[i].chNum == (bestChNum - 4)) |
| weight_below = pspect_info[i].weight; |
| |
| if (pspect_info[i].chNum == (bestChNum + 4)) |
| weight_above = pspect_info[i].weight; |
| } |
| |
| if (weight_below < weight_above) |
| pSapCtx->acs_cfg->ht_sec_ch = |
| pSapCtx->acs_cfg->pri_ch - 4; |
| else |
| pSapCtx->acs_cfg->ht_sec_ch = |
| pSapCtx->acs_cfg->pri_ch + 4; |
| } else if (bestChNum >= 1 && bestChNum <= 4) { |
| pSapCtx->acs_cfg->ht_sec_ch = |
| pSapCtx->acs_cfg->pri_ch + 4; |
| } else if (bestChNum >= 8 && bestChNum <= 13) { |
| pSapCtx->acs_cfg->ht_sec_ch = |
| pSapCtx->acs_cfg->pri_ch - 4; |
| } else if (bestChNum == 14) { |
| pSapCtx->acs_cfg->ht_sec_ch = 0; |
| } |
| pSapCtx->secondary_ch = pSapCtx->acs_cfg->ht_sec_ch; |
| } |
| /* Free all the allocated memory */ |
| sap_chan_sel_exit(pSpectInfoParams); |
| |
| CDF_TRACE(CDF_MODULE_ID_SAP, CDF_TRACE_LEVEL_INFO_HIGH, |
| "In %s, Running SAP Ch select Completed, Ch=%d", __func__, |
| bestChNum); |
| if (bestChNum > 0 && bestChNum <= 252) |
| return bestChNum; |
| else |
| return SAP_CHANNEL_NOT_SELECTED; |
| } |