Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (c) 2012-2015 The Linux Foundation. All rights reserved. |
| 3 | * |
| 4 | * Previously licensed under the ISC license by Qualcomm Atheros, Inc. |
| 5 | * |
| 6 | * |
| 7 | * Permission to use, copy, modify, and/or distribute this software for |
| 8 | * any purpose with or without fee is hereby granted, provided that the |
| 9 | * above copyright notice and this permission notice appear in all |
| 10 | * copies. |
| 11 | * |
| 12 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL |
| 13 | * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED |
| 14 | * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE |
| 15 | * AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL |
| 16 | * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR |
| 17 | * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER |
| 18 | * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR |
| 19 | * PERFORMANCE OF THIS SOFTWARE. |
| 20 | */ |
| 21 | |
| 22 | /* |
| 23 | * This file was originally distributed by Qualcomm Atheros, Inc. |
| 24 | * under proprietary terms before Copyright ownership was assigned |
| 25 | * to the Linux Foundation. |
| 26 | */ |
| 27 | |
| 28 | /*=========================================================================== |
| 29 | |
| 30 | s a p C h S e l e c t . C |
| 31 | OVERVIEW: |
| 32 | |
| 33 | This software unit holds the implementation of the WLAN SAP modules |
| 34 | functions for channel selection. |
| 35 | |
| 36 | DEPENDENCIES: |
| 37 | |
| 38 | Are listed for each API below. |
| 39 | ===========================================================================*/ |
| 40 | |
| 41 | /*-------------------------------------------------------------------------- |
| 42 | Include Files |
| 43 | ------------------------------------------------------------------------*/ |
| 44 | #include "cdf_trace.h" |
| 45 | #include "csr_api.h" |
| 46 | #include "sme_api.h" |
| 47 | #include "sap_ch_select.h" |
| 48 | #include "sap_internal.h" |
| 49 | #ifdef ANI_OS_TYPE_QNX |
| 50 | #include "stdio.h" |
| 51 | #endif |
| 52 | #ifdef FEATURE_AP_MCC_CH_AVOIDANCE |
| 53 | #include "lim_utils.h" |
| 54 | #include "parser_api.h" |
| 55 | #endif /* FEATURE_AP_MCC_CH_AVOIDANCE */ |
| 56 | |
| 57 | #ifdef CONFIG_CNSS |
| 58 | #include <net/cnss.h> |
| 59 | #endif |
| 60 | |
| 61 | /*-------------------------------------------------------------------------- |
| 62 | Function definitions |
| 63 | --------------------------------------------------------------------------*/ |
| 64 | |
| 65 | /*-------------------------------------------------------------------------- |
| 66 | Defines |
| 67 | --------------------------------------------------------------------------*/ |
| 68 | #define SAP_DEBUG |
| 69 | |
| 70 | #define IS_RSSI_VALID(extRssi, rssi) \ |
| 71 | ( \ |
| 72 | ((extRssi < rssi) ? true : false) \ |
| 73 | ) |
| 74 | |
| 75 | #define SET_ACS_BAND(acs_band, pSapCtx) \ |
| 76 | { \ |
| 77 | if (pSapCtx->acs_cfg->start_ch <= 14 && \ |
| 78 | pSapCtx->acs_cfg->end_ch <= 14) \ |
| 79 | acs_band = eCSR_DOT11_MODE_11g; \ |
| 80 | else if (pSapCtx->acs_cfg->start_ch >= 14)\ |
| 81 | acs_band = eCSR_DOT11_MODE_11a; \ |
| 82 | else \ |
| 83 | acs_band = eCSR_DOT11_MODE_abg; \ |
| 84 | } |
| 85 | |
| 86 | #ifdef FEATURE_WLAN_CH_AVOID |
| 87 | sapSafeChannelType safe_channels[NUM_20MHZ_RF_CHANNELS] = { |
| 88 | /*CH , SAFE, default safe */ |
| 89 | {1, true} |
| 90 | , /* RF_CHAN_1, */ |
| 91 | {2, true} |
| 92 | , /* RF_CHAN_2, */ |
| 93 | {3, true} |
| 94 | , /* RF_CHAN_3, */ |
| 95 | {4, true} |
| 96 | , /* RF_CHAN_4, */ |
| 97 | {5, true} |
| 98 | , /* RF_CHAN_5, */ |
| 99 | {6, true} |
| 100 | , /* RF_CHAN_6, */ |
| 101 | {7, true} |
| 102 | , /* RF_CHAN_7, */ |
| 103 | {8, true} |
| 104 | , /* RF_CHAN_8, */ |
| 105 | {9, true} |
| 106 | , /* RF_CHAN_9, */ |
| 107 | {10, true} |
| 108 | , /* RF_CHAN_10, */ |
| 109 | {11, true} |
| 110 | , /* RF_CHAN_11, */ |
| 111 | {12, true} |
| 112 | , /* RF_CHAN_12, */ |
| 113 | {13, true} |
| 114 | , /* RF_CHAN_13, */ |
| 115 | {14, true} |
| 116 | , /* RF_CHAN_14, */ |
| 117 | {240, true} |
| 118 | , /* RF_CHAN_240, */ |
| 119 | {244, true} |
| 120 | , /* RF_CHAN_244, */ |
| 121 | {248, true} |
| 122 | , /* RF_CHAN_248, */ |
| 123 | {252, true} |
| 124 | , /* RF_CHAN_252, */ |
| 125 | {208, true} |
| 126 | , /* RF_CHAN_208, */ |
| 127 | {212, true} |
| 128 | , /* RF_CHAN_212, */ |
| 129 | {216, true} |
| 130 | , /* RF_CHAN_216, */ |
| 131 | {36, true} |
| 132 | , /* RF_CHAN_36, */ |
| 133 | {40, true} |
| 134 | , /* RF_CHAN_40, */ |
| 135 | {44, true} |
| 136 | , /* RF_CHAN_44, */ |
| 137 | {48, true} |
| 138 | , /* RF_CHAN_48, */ |
| 139 | {52, true} |
| 140 | , /* RF_CHAN_52, */ |
| 141 | {56, true} |
| 142 | , /* RF_CHAN_56, */ |
| 143 | {60, true} |
| 144 | , /* RF_CHAN_60, */ |
| 145 | {64, true} |
| 146 | , /* RF_CHAN_64, */ |
| 147 | {100, true} |
| 148 | , /* RF_CHAN_100, */ |
| 149 | {104, true} |
| 150 | , /* RF_CHAN_104, */ |
| 151 | {108, true} |
| 152 | , /* RF_CHAN_108, */ |
| 153 | {112, true} |
| 154 | , /* RF_CHAN_112, */ |
| 155 | {116, true} |
| 156 | , /* RF_CHAN_116, */ |
| 157 | {120, true} |
| 158 | , /* RF_CHAN_120, */ |
| 159 | {124, true} |
| 160 | , /* RF_CHAN_124, */ |
| 161 | {128, true} |
| 162 | , /* RF_CHAN_128, */ |
| 163 | {132, true} |
| 164 | , /* RF_CHAN_132, */ |
| 165 | {136, true} |
| 166 | , /* RF_CHAN_136, */ |
| 167 | {140, true} |
| 168 | , /* RF_CHAN_140, */ |
| 169 | {144, true} |
| 170 | , /* RF_CHAN_144, */ |
| 171 | {149, true} |
| 172 | , /* RF_CHAN_149, */ |
| 173 | {153, true} |
| 174 | , /* RF_CHAN_153, */ |
| 175 | {157, true} |
| 176 | , /* RF_CHAN_157, */ |
| 177 | {161, true} |
| 178 | , /* RF_CHAN_161, */ |
| 179 | {165, true} |
| 180 | , /* RF_CHAN_165, */ |
| 181 | }; |
| 182 | #endif |
| 183 | |
| 184 | typedef struct { |
| 185 | uint16_t chStartNum; |
| 186 | uint32_t weight; |
| 187 | } sapAcsChannelInfo; |
| 188 | |
| 189 | sapAcsChannelInfo acs_ht40_channels5_g[] = { |
| 190 | {36, SAP_ACS_WEIGHT_MAX}, |
| 191 | {44, SAP_ACS_WEIGHT_MAX}, |
| 192 | {52, SAP_ACS_WEIGHT_MAX}, |
| 193 | {60, SAP_ACS_WEIGHT_MAX}, |
| 194 | {100, SAP_ACS_WEIGHT_MAX}, |
| 195 | {108, SAP_ACS_WEIGHT_MAX}, |
| 196 | {116, SAP_ACS_WEIGHT_MAX}, |
| 197 | {124, SAP_ACS_WEIGHT_MAX}, |
| 198 | {132, SAP_ACS_WEIGHT_MAX}, |
| 199 | {140, SAP_ACS_WEIGHT_MAX}, |
| 200 | {149, SAP_ACS_WEIGHT_MAX}, |
| 201 | {157, SAP_ACS_WEIGHT_MAX}, |
| 202 | }; |
| 203 | |
| 204 | sapAcsChannelInfo acs_ht80_channels[] = { |
| 205 | {36, SAP_ACS_WEIGHT_MAX}, |
| 206 | {52, SAP_ACS_WEIGHT_MAX}, |
| 207 | {100, SAP_ACS_WEIGHT_MAX}, |
| 208 | {116, SAP_ACS_WEIGHT_MAX}, |
| 209 | {132, SAP_ACS_WEIGHT_MAX}, |
| 210 | {149, SAP_ACS_WEIGHT_MAX}, |
| 211 | }; |
| 212 | |
| 213 | sapAcsChannelInfo acs_ht40_channels24_g[] = { |
| 214 | {1, SAP_ACS_WEIGHT_MAX}, |
| 215 | {2, SAP_ACS_WEIGHT_MAX}, |
| 216 | {3, SAP_ACS_WEIGHT_MAX}, |
| 217 | {4, SAP_ACS_WEIGHT_MAX}, |
| 218 | {9, SAP_ACS_WEIGHT_MAX}, |
| 219 | }; |
| 220 | |
| 221 | #define CHANNEL_165 165 |
| 222 | |
| 223 | /* rssi discount for channels in PCL */ |
| 224 | #define PCL_RSSI_DISCOUNT 10 |
| 225 | |
| 226 | #ifdef FEATURE_AP_MCC_CH_AVOIDANCE |
| 227 | /** |
| 228 | * sap_check_n_add_channel() - checks and add given channel in sap context's |
| 229 | * avoid_channels_info struct |
| 230 | * @sap_ctx: sap context. |
| 231 | * @new_channel: channel to be added to sap_ctx's avoid ch info |
| 232 | * |
| 233 | * sap_ctx contains sap_avoid_ch_info strcut containing the list of channels on |
| 234 | * which MDM device's AP with MCC was detected. This function will add channels |
| 235 | * to that list after checking for duplicates. |
| 236 | * |
| 237 | * Return: true: if channel was added or already present |
| 238 | * else false: if channel list was already full. |
| 239 | */ |
| 240 | bool |
| 241 | sap_check_n_add_channel(ptSapContext sap_ctx, |
| 242 | uint8_t new_channel) |
| 243 | { |
| 244 | uint8_t i = 0; |
| 245 | struct sap_avoid_channels_info *ie_info = |
| 246 | &sap_ctx->sap_detected_avoid_ch_ie; |
| 247 | |
| 248 | for (i = 0; i < sizeof(ie_info->channels); i++) { |
| 249 | if (ie_info->channels[i] == new_channel) |
| 250 | break; |
| 251 | |
| 252 | if (ie_info->channels[i] == 0) { |
| 253 | ie_info->channels[i] = new_channel; |
| 254 | break; |
| 255 | } |
| 256 | } |
| 257 | if (i == sizeof(ie_info->channels)) |
| 258 | return false; |
| 259 | else |
| 260 | return true; |
| 261 | } |
| 262 | /** |
| 263 | * sap_check_n_add_overlapped_chnls() - checks & add overlapped channels |
| 264 | * to primary channel in 2.4Ghz band. |
| 265 | * @sap_ctx: sap context. |
| 266 | * @primary_chnl: primary channel to be avoided. |
| 267 | * |
| 268 | * sap_ctx contains sap_avoid_ch_info struct containing the list of channels on |
| 269 | * which MDM device's AP with MCC was detected. This function will add channels |
| 270 | * to that list after checking for duplicates. |
| 271 | * |
| 272 | * Return: true: if channel was added or already present |
| 273 | * else false: if channel list was already full. |
| 274 | */ |
| 275 | static bool |
| 276 | sap_check_n_add_overlapped_chnls(ptSapContext sap_ctx, uint8_t primary_channel) |
| 277 | { |
| 278 | uint8_t i = 0, j = 0, upper_chnl = 0, lower_chnl = 0; |
| 279 | struct sap_avoid_channels_info *ie_info = |
| 280 | &sap_ctx->sap_detected_avoid_ch_ie; |
| 281 | /* |
| 282 | * if primary channel less than channel 1 or out of 2g band then |
| 283 | * no further process is required. return true in this case. |
| 284 | */ |
| 285 | if (primary_channel < CHANNEL_1 || primary_channel > CHANNEL_14) |
| 286 | return true; |
| 287 | |
| 288 | /* lower channel is one channel right before primary channel */ |
| 289 | lower_chnl = primary_channel - 1; |
| 290 | /* upper channel is one channel right after primary channel */ |
| 291 | upper_chnl = primary_channel + 1; |
| 292 | |
| 293 | /* lower channel needs to be non-zero, zero is not valid channel */ |
| 294 | if (lower_chnl > (CHANNEL_1 - 1)) { |
| 295 | for (i = 0; i < sizeof(ie_info->channels); i++) { |
| 296 | if (ie_info->channels[i] == lower_chnl) |
| 297 | break; |
| 298 | if (ie_info->channels[i] == 0) { |
| 299 | ie_info->channels[i] = lower_chnl; |
| 300 | break; |
| 301 | } |
| 302 | } |
| 303 | } |
| 304 | /* upper channel needs to be atleast last channel in 2.4Ghz band */ |
| 305 | if (upper_chnl < (CHANNEL_14 + 1)) { |
| 306 | for (j = 0; j < sizeof(ie_info->channels); j++) { |
| 307 | if (ie_info->channels[j] == upper_chnl) |
| 308 | break; |
| 309 | if (ie_info->channels[j] == 0) { |
| 310 | ie_info->channels[j] = upper_chnl; |
| 311 | break; |
| 312 | } |
| 313 | } |
| 314 | } |
| 315 | if (i == sizeof(ie_info->channels) || j == sizeof(ie_info->channels)) |
| 316 | return false; |
| 317 | else |
| 318 | return true; |
| 319 | } |
| 320 | |
| 321 | /** |
| 322 | * sap_process_avoid_ie() - processes the detected Q2Q IE |
| 323 | * context's avoid_channels_info struct |
| 324 | * @hal: hal handle |
| 325 | * @sap_ctx: sap context. |
| 326 | * @scan_result: scan results for ACS scan. |
| 327 | * @spect_info: spectrum weights array to update |
| 328 | * |
| 329 | * Detection of Q2Q IE indicates presence of another MDM device with its AP |
| 330 | * operating in MCC mode. This function parses the scan results and processes |
| 331 | * the Q2Q IE if found. It then extracts the channels and populates them in |
| 332 | * sap_ctx struct. It also increases the weights of those channels so that |
| 333 | * ACS logic will avoid those channels in its selection algorithm. |
| 334 | * |
| 335 | * Return: void |
| 336 | */ |
| 337 | void sap_process_avoid_ie(tHalHandle hal, |
| 338 | ptSapContext sap_ctx, |
| 339 | tScanResultHandle scan_result, |
| 340 | tSapChSelSpectInfo *spect_info) |
| 341 | { |
| 342 | uint32_t total_ie_len = 0; |
| 343 | uint8_t *temp_ptr = NULL; |
| 344 | uint8_t i = 0; |
| 345 | struct sAvoidChannelIE *avoid_ch_ie; |
| 346 | tCsrScanResultInfo *node = NULL; |
| 347 | tpAniSirGlobal mac_ctx = NULL; |
| 348 | tSapSpectChInfo *spect_ch = NULL; |
| 349 | |
| 350 | mac_ctx = PMAC_STRUCT(hal); |
| 351 | spect_ch = spect_info->pSpectCh; |
| 352 | node = sme_scan_result_get_first(hal, scan_result); |
| 353 | |
| 354 | while (node) { |
| 355 | total_ie_len = (node->BssDescriptor.length + |
| 356 | sizeof(uint16_t) + sizeof(uint32_t) - |
| 357 | sizeof(tSirBssDescription)); |
| 358 | temp_ptr = cfg_get_vendor_ie_ptr_from_oui(mac_ctx, |
| 359 | SIR_MAC_QCOM_VENDOR_OUI, |
| 360 | SIR_MAC_QCOM_VENDOR_SIZE, |
| 361 | ((uint8_t *)&node->BssDescriptor.ieFields), |
| 362 | total_ie_len); |
| 363 | |
| 364 | if (temp_ptr) { |
| 365 | avoid_ch_ie = (struct sAvoidChannelIE *)temp_ptr; |
| 366 | if (avoid_ch_ie->type != QCOM_VENDOR_IE_MCC_AVOID_CH) |
| 367 | continue; |
| 368 | |
| 369 | sap_ctx->sap_detected_avoid_ch_ie.present = 1; |
| 370 | CDF_TRACE(CDF_MODULE_ID_SAP, |
| 371 | CDF_TRACE_LEVEL_DEBUG, |
| 372 | "Q2Q IE - avoid ch %d", |
| 373 | avoid_ch_ie->channel); |
| 374 | /* add this channel to to_avoid channel list */ |
| 375 | sap_check_n_add_channel(sap_ctx, |
| 376 | avoid_ch_ie->channel); |
| 377 | sap_check_n_add_overlapped_chnls(sap_ctx, |
| 378 | avoid_ch_ie->channel); |
| 379 | /* |
| 380 | * Mark weight of these channel present in IE to MAX |
| 381 | * so that ACS logic will to avoid thse channels |
| 382 | */ |
| 383 | for (i = 0; i < spect_info->numSpectChans; i++) |
| 384 | if (spect_ch[i].chNum == avoid_ch_ie->channel) { |
| 385 | /* |
| 386 | * weight is set more than max so that, |
| 387 | * in the case of other channels being |
| 388 | * assigned max weight due to noise, |
| 389 | * they may be preferred over channels |
| 390 | * with Q2Q IE. |
| 391 | */ |
| 392 | spect_ch[i].weight = SAP_ACS_WEIGHT_MAX + 1; |
| 393 | spect_ch[i].weight_copy = |
| 394 | SAP_ACS_WEIGHT_MAX + 1; |
| 395 | break; |
| 396 | } |
| 397 | } /* if (temp_ptr) */ |
| 398 | node = sme_scan_result_get_next(hal, scan_result); |
| 399 | } |
| 400 | } |
| 401 | #endif /* FEATURE_AP_MCC_CH_AVOIDANCE */ |
| 402 | |
| 403 | #ifdef FEATURE_WLAN_CH_AVOID |
| 404 | /*========================================================================== |
| 405 | FUNCTION sap_update_unsafe_channel_list |
| 406 | |
| 407 | DESCRIPTION |
| 408 | Function Undate unsafe channel list table |
| 409 | |
| 410 | DEPENDENCIES |
| 411 | NA. |
| 412 | |
| 413 | IN |
| 414 | SapContext pointer |
| 415 | |
| 416 | RETURN VALUE |
| 417 | NULL |
| 418 | ============================================================================*/ |
| 419 | #ifdef CONFIG_CNSS |
| 420 | void sap_update_unsafe_channel_list(ptSapContext pSapCtx) |
| 421 | { |
| 422 | uint16_t i, j; |
| 423 | uint16_t unsafe_channel_list[NUM_20MHZ_RF_CHANNELS]; |
| 424 | uint16_t unsafe_channel_count = 0; |
| 425 | |
| 426 | /* Flush, default set all channel safe */ |
| 427 | for (i = 0; i < NUM_20MHZ_RF_CHANNELS; i++) { |
| 428 | safe_channels[i].isSafe = true; |
| 429 | } |
| 430 | |
| 431 | /* Try to find unsafe channel */ |
| 432 | #if defined(FEATURE_WLAN_STA_AP_MODE_DFS_DISABLE) || \ |
| 433 | defined(WLAN_FEATURE_MBSSID) |
| 434 | for (i = 0; i < NUM_20MHZ_RF_CHANNELS; i++) { |
| 435 | if (pSapCtx->dfs_ch_disable == true) { |
| 436 | if (CDS_IS_DFS_CH(safe_channels[i].channelNumber)) { |
| 437 | safe_channels[i].isSafe = false; |
| 438 | CDF_TRACE(CDF_MODULE_ID_SAP, |
| 439 | CDF_TRACE_LEVEL_INFO_HIGH, |
| 440 | "%s: DFS Ch %d is not safe in" |
| 441 | " Concurrent mode", |
| 442 | __func__, |
| 443 | safe_channels[i].channelNumber); |
| 444 | } |
| 445 | } |
| 446 | } |
| 447 | #endif |
| 448 | |
| 449 | cnss_get_wlan_unsafe_channel(unsafe_channel_list, |
| 450 | &unsafe_channel_count, |
| 451 | sizeof(unsafe_channel_list)); |
| 452 | |
| 453 | for (i = 0; i < unsafe_channel_count; i++) { |
| 454 | for (j = 0; j < NUM_20MHZ_RF_CHANNELS; j++) { |
| 455 | if (safe_channels[j].channelNumber == |
| 456 | unsafe_channel_list[i]) { |
| 457 | /* Found unsafe channel, update it */ |
| 458 | safe_channels[j].isSafe = false; |
| 459 | CDF_TRACE(CDF_MODULE_ID_SAP, |
| 460 | CDF_TRACE_LEVEL_ERROR, |
| 461 | FL("CH %d is not safe"), |
| 462 | unsafe_channel_list[i]); |
| 463 | break; |
| 464 | } |
| 465 | } |
| 466 | } |
| 467 | |
| 468 | return; |
| 469 | } |
| 470 | #else |
| 471 | void sap_update_unsafe_channel_list(ptSapContext pSapCtx) |
| 472 | { |
| 473 | CDF_TRACE(CDF_MODULE_ID_SAP, CDF_TRACE_LEVEL_ERROR, |
| 474 | "%s: Not implemented", __func__); |
| 475 | return; |
| 476 | } |
| 477 | #endif |
| 478 | |
| 479 | #endif /* FEATURE_WLAN_CH_AVOID */ |
| 480 | |
| 481 | /*========================================================================== |
| 482 | FUNCTION sap_cleanup_channel_list |
| 483 | |
| 484 | DESCRIPTION |
| 485 | Function sap_cleanup_channel_list frees up the memory allocated to the channel list. |
| 486 | |
| 487 | DEPENDENCIES |
| 488 | NA. |
| 489 | |
| 490 | PARAMETERS |
| 491 | |
| 492 | IN |
| 493 | NULL |
| 494 | |
| 495 | RETURN VALUE |
| 496 | NULL |
| 497 | ============================================================================*/ |
| 498 | |
| 499 | void sap_cleanup_channel_list( |
| 500 | #ifdef WLAN_FEATURE_MBSSID |
| 501 | void *p_cds_gctx |
| 502 | #else |
| 503 | void |
| 504 | #endif |
| 505 | ) { |
| 506 | #ifndef WLAN_FEATURE_MBSSID |
| 507 | void *p_cds_gctx = cds_get_global_context(); |
| 508 | #endif |
| 509 | ptSapContext pSapCtx; |
| 510 | |
| 511 | CDF_TRACE(CDF_MODULE_ID_SAP, CDF_TRACE_LEVEL_INFO, |
| 512 | "Cleaning up the channel list structure"); |
| 513 | |
| 514 | if (NULL == p_cds_gctx) { |
| 515 | CDF_TRACE(CDF_MODULE_ID_SAP, CDF_TRACE_LEVEL_FATAL, |
| 516 | "SAP Global Context is NULL"); |
| 517 | return; |
| 518 | } |
| 519 | |
| 520 | pSapCtx = CDS_GET_SAP_CB(p_cds_gctx); |
| 521 | if (NULL == pSapCtx) { |
| 522 | CDF_TRACE(CDF_MODULE_ID_SAP, CDF_TRACE_LEVEL_FATAL, |
| 523 | "SAP Context is NULL"); |
| 524 | return; |
| 525 | } |
| 526 | |
| 527 | pSapCtx->SapChnlList.numChannel = 0; |
| 528 | if (pSapCtx->SapChnlList.channelList) { |
| 529 | cdf_mem_free(pSapCtx->SapChnlList.channelList); |
| 530 | pSapCtx->SapChnlList.channelList = NULL; |
| 531 | } |
| 532 | |
| 533 | pSapCtx->SapAllChnlList.numChannel = 0; |
| 534 | if (pSapCtx->SapAllChnlList.channelList) { |
| 535 | cdf_mem_free(pSapCtx->SapAllChnlList.channelList); |
| 536 | pSapCtx->SapAllChnlList.channelList = NULL; |
| 537 | } |
| 538 | } |
| 539 | |
| 540 | /** |
| 541 | * sap_select_preferred_channel_from_channel_list() - to calc best cahnnel |
| 542 | * @best_chnl: best channel already calculated among all the chanels |
| 543 | * @sap_ctx: sap context |
| 544 | * @spectinfo_param: Pointer to tSapChSelSpectInfo structure |
| 545 | * |
| 546 | * This function calculates the best channel among the configured channel list. |
| 547 | * If channel list not configured then returns the best channel calculated |
| 548 | * among all the channel list. |
| 549 | * |
| 550 | * Return: uint8_t best channel |
| 551 | */ |
| 552 | uint8_t sap_select_preferred_channel_from_channel_list(uint8_t best_chnl, |
| 553 | ptSapContext sap_ctx, |
| 554 | tSapChSelSpectInfo *spectinfo_param) |
| 555 | { |
| 556 | uint8_t i = 0; |
| 557 | |
| 558 | /* |
| 559 | * If Channel List is not Configured don't do anything |
| 560 | * Else return the Best Channel from the Channel List |
| 561 | */ |
| 562 | if ((NULL == sap_ctx->acs_cfg->ch_list) || |
| 563 | (NULL == spectinfo_param) || |
| 564 | (0 == sap_ctx->acs_cfg->ch_list_count)) |
| 565 | return best_chnl; |
| 566 | |
| 567 | if (best_chnl <= 0 || best_chnl > 252) |
| 568 | return SAP_CHANNEL_NOT_SELECTED; |
| 569 | |
| 570 | /* Select the best channel from allowed list */ |
| 571 | for (i = 0; i < sap_ctx->acs_cfg->ch_list_count; i++) { |
| 572 | if (sap_ctx->acs_cfg->ch_list[i] == best_chnl) { |
| 573 | CDF_TRACE(CDF_MODULE_ID_SAP, |
| 574 | CDF_TRACE_LEVEL_INFO_HIGH, |
| 575 | "Best channel is: %d", |
| 576 | best_chnl); |
| 577 | return best_chnl; |
| 578 | } |
| 579 | } |
| 580 | |
| 581 | return SAP_CHANNEL_NOT_SELECTED; |
| 582 | } |
| 583 | |
| 584 | /*========================================================================== |
| 585 | FUNCTION sap_chan_sel_init |
| 586 | |
| 587 | DESCRIPTION |
| 588 | Function sap_chan_sel_init allocates the memory, intializes the |
| 589 | structures used by the channel selection algorithm |
| 590 | |
| 591 | DEPENDENCIES |
| 592 | NA. |
| 593 | |
| 594 | PARAMETERS |
| 595 | |
| 596 | IN |
| 597 | halHandle : Pointer to tHalHandle |
| 598 | *pSpectInfoParams : Pointer to tSapChSelSpectInfo structure |
| 599 | pSapCtx : Pointer to SAP Context |
| 600 | |
| 601 | RETURN VALUE |
| 602 | bool: Success or FAIL |
| 603 | |
| 604 | SIDE EFFECTS |
| 605 | ============================================================================*/ |
| 606 | bool sap_chan_sel_init(tHalHandle halHandle, |
| 607 | tSapChSelSpectInfo *pSpectInfoParams, ptSapContext pSapCtx) |
| 608 | { |
| 609 | tSapSpectChInfo *pSpectCh = NULL; |
| 610 | uint8_t *pChans = NULL; |
| 611 | uint16_t channelnum = 0; |
| 612 | tpAniSirGlobal pMac = PMAC_STRUCT(halHandle); |
| 613 | bool chSafe = true; |
| 614 | #ifdef FEATURE_WLAN_CH_AVOID |
| 615 | uint16_t i; |
| 616 | #endif |
| 617 | uint32_t dfs_master_cap_enabled; |
| 618 | bool include_dfs_ch = true; |
| 619 | |
| 620 | CDF_TRACE(CDF_MODULE_ID_SAP, CDF_TRACE_LEVEL_INFO_HIGH, "In %s", |
| 621 | __func__); |
| 622 | |
| 623 | pSpectInfoParams->numSpectChans = |
| 624 | pMac->scan.base_channels.numChannels; |
| 625 | |
| 626 | /* Allocate memory for weight computation of 2.4GHz */ |
| 627 | pSpectCh = |
| 628 | (tSapSpectChInfo *) cdf_mem_malloc((pSpectInfoParams->numSpectChans) |
| 629 | * sizeof(*pSpectCh)); |
| 630 | |
| 631 | if (pSpectCh == NULL) { |
| 632 | CDF_TRACE(CDF_MODULE_ID_SAP, CDF_TRACE_LEVEL_ERROR, |
| 633 | "In %s, CDF_MALLOC_ERR", __func__); |
| 634 | return eSAP_FALSE; |
| 635 | } |
| 636 | |
| 637 | cdf_mem_zero(pSpectCh, |
| 638 | (pSpectInfoParams->numSpectChans) * sizeof(*pSpectCh)); |
| 639 | |
| 640 | /* Initialize the pointers in the DfsParams to the allocated memory */ |
| 641 | pSpectInfoParams->pSpectCh = pSpectCh; |
| 642 | |
| 643 | pChans = pMac->scan.base_channels.channelList; |
| 644 | |
| 645 | #if defined(FEATURE_WLAN_STA_AP_MODE_DFS_DISABLE) || defined(WLAN_FEATURE_MBSSID) |
| 646 | if (pSapCtx->dfs_ch_disable == true) |
| 647 | include_dfs_ch = false; |
| 648 | #endif |
| 649 | sme_cfg_get_int(halHandle, WNI_CFG_DFS_MASTER_ENABLED, |
| 650 | &dfs_master_cap_enabled); |
| 651 | if (dfs_master_cap_enabled == 0) |
| 652 | include_dfs_ch = false; |
| 653 | |
| 654 | /* Fill the channel number in the spectrum in the operating freq band */ |
| 655 | for (channelnum = 0; |
| 656 | channelnum < pSpectInfoParams->numSpectChans; |
| 657 | channelnum++, pChans++) { |
| 658 | chSafe = true; |
| 659 | |
| 660 | /* check if the channel is in NOL blacklist */ |
| 661 | if (sap_dfs_is_channel_in_nol_list(pSapCtx, *pChans, |
| 662 | PHY_SINGLE_CHANNEL_CENTERED)) { |
| 663 | CDF_TRACE(CDF_MODULE_ID_SAP, CDF_TRACE_LEVEL_INFO_HIGH, |
| 664 | "In %s, Ch %d is in NOL list", __func__, |
| 665 | *pChans); |
| 666 | chSafe = false; |
| 667 | continue; |
| 668 | } |
| 669 | |
| 670 | if (include_dfs_ch == false) { |
| 671 | if (CDS_IS_DFS_CH(*pChans)) { |
| 672 | chSafe = false; |
| 673 | CDF_TRACE(CDF_MODULE_ID_SAP, |
| 674 | CDF_TRACE_LEVEL_INFO_HIGH, |
| 675 | "In %s, DFS Ch %d not considered for ACS", |
| 676 | __func__, *pChans); |
| 677 | continue; |
| 678 | } |
| 679 | } |
| 680 | |
| 681 | #ifdef FEATURE_WLAN_CH_AVOID |
| 682 | for (i = 0; i < NUM_20MHZ_RF_CHANNELS; i++) { |
| 683 | if ((safe_channels[i].channelNumber == *pChans) && |
| 684 | (false == safe_channels[i].isSafe)) { |
| 685 | CDF_TRACE(CDF_MODULE_ID_SAP, |
| 686 | CDF_TRACE_LEVEL_INFO_HIGH, |
| 687 | "In %s, Ch %d is not safe", __func__, |
| 688 | *pChans); |
| 689 | chSafe = false; |
| 690 | break; |
| 691 | } |
| 692 | } |
| 693 | #endif /* FEATURE_WLAN_CH_AVOID */ |
| 694 | |
| 695 | /* OFDM rates are not supported on channel 14 */ |
| 696 | if (*pChans == 14 && |
| 697 | eCSR_DOT11_MODE_11b != pSapCtx->csr_roamProfile.phyMode) { |
| 698 | pSpectCh++; |
| 699 | continue; |
| 700 | } |
| 701 | |
| 702 | if (true == chSafe) { |
| 703 | pSpectCh->chNum = *pChans; |
| 704 | pSpectCh->valid = eSAP_TRUE; |
| 705 | pSpectCh->rssiAgr = SOFTAP_MIN_RSSI; /* Initialise for all channels */ |
| 706 | pSpectCh->channelWidth = SOFTAP_HT20_CHANNELWIDTH; /* Initialise 20MHz for all the Channels */ |
| 707 | } |
| 708 | pSpectCh++; |
| 709 | } |
| 710 | return eSAP_TRUE; |
| 711 | } |
| 712 | |
| 713 | /*========================================================================== |
| 714 | FUNCTION sapweight_rssi_count |
| 715 | |
| 716 | DESCRIPTION |
| 717 | Function weightRssiCount calculates the channel weight due to rssi |
| 718 | and data count(here number of BSS observed) |
| 719 | |
| 720 | DEPENDENCIES |
| 721 | NA. |
| 722 | |
| 723 | PARAMETERS |
| 724 | |
| 725 | IN |
| 726 | rssi : Max signal strength receieved from a BSS for the channel |
| 727 | count : Number of BSS observed in the channel |
| 728 | |
| 729 | RETURN VALUE |
| 730 | uint32_t : Calculated channel weight based on above two |
| 731 | |
| 732 | SIDE EFFECTS |
| 733 | ============================================================================*/ |
| 734 | uint32_t sapweight_rssi_count(int8_t rssi, uint16_t count) |
| 735 | { |
| 736 | int32_t rssiWeight = 0; |
| 737 | int32_t countWeight = 0; |
| 738 | uint32_t rssicountWeight = 0; |
| 739 | |
| 740 | /* Weight from RSSI */ |
| 741 | rssiWeight = SOFTAP_RSSI_WEIGHT * (rssi - SOFTAP_MIN_RSSI) |
| 742 | / (SOFTAP_MAX_RSSI - SOFTAP_MIN_RSSI); |
| 743 | |
| 744 | if (rssiWeight > SOFTAP_RSSI_WEIGHT) |
| 745 | rssiWeight = SOFTAP_RSSI_WEIGHT; |
| 746 | else if (rssiWeight < 0) |
| 747 | rssiWeight = 0; |
| 748 | |
| 749 | /* Weight from data count */ |
| 750 | countWeight = SOFTAP_COUNT_WEIGHT * (count - SOFTAP_MIN_COUNT) |
| 751 | / (SOFTAP_MAX_COUNT - SOFTAP_MIN_COUNT); |
| 752 | |
| 753 | if (countWeight > SOFTAP_COUNT_WEIGHT) |
| 754 | countWeight = SOFTAP_COUNT_WEIGHT; |
| 755 | |
| 756 | rssicountWeight = rssiWeight + countWeight; |
| 757 | |
| 758 | CDF_TRACE(CDF_MODULE_ID_SAP, CDF_TRACE_LEVEL_INFO_HIGH, |
| 759 | "In %s, rssiWeight=%d, countWeight=%d, rssicountWeight=%d", |
| 760 | __func__, rssiWeight, countWeight, rssicountWeight); |
| 761 | |
| 762 | return rssicountWeight; |
| 763 | } |
| 764 | |
| 765 | /** |
| 766 | * sap_update_rssi_bsscount() - updates bss count and rssi effect. |
| 767 | * |
| 768 | * @pSpectCh: Channel Information |
| 769 | * @offset: Channel Offset |
| 770 | * @sap_24g: Channel is in 2.4G or 5G |
| 771 | * |
| 772 | * sap_update_rssi_bsscount updates bss count and rssi effect based |
| 773 | * on the channel offset. |
| 774 | * |
| 775 | * Return: None. |
| 776 | */ |
| 777 | |
| 778 | void sap_update_rssi_bsscount(tSapSpectChInfo *pSpectCh, int32_t offset, |
| 779 | bool sap_24g) |
| 780 | { |
| 781 | tSapSpectChInfo *pExtSpectCh = NULL; |
| 782 | int32_t rssi, rsssi_effect; |
| 783 | |
| 784 | pExtSpectCh = (pSpectCh + offset); |
| 785 | if (pExtSpectCh != NULL) { |
| 786 | ++pExtSpectCh->bssCount; |
| 787 | switch (offset) { |
| 788 | case -1: |
| 789 | case 1: |
| 790 | rsssi_effect = sap_24g ? |
| 791 | SAP_24GHZ_FIRST_OVERLAP_CHAN_RSSI_EFFECT_PRIMARY : |
| 792 | SAP_SUBBAND1_RSSI_EFFECT_PRIMARY; |
| 793 | break; |
| 794 | case -2: |
| 795 | case 2: |
| 796 | rsssi_effect = sap_24g ? |
| 797 | SAP_24GHZ_SEC_OVERLAP_CHAN_RSSI_EFFECT_PRIMARY : |
| 798 | SAP_SUBBAND2_RSSI_EFFECT_PRIMARY; |
| 799 | break; |
| 800 | case -3: |
| 801 | case 3: |
| 802 | rsssi_effect = sap_24g ? |
| 803 | SAP_24GHZ_THIRD_OVERLAP_CHAN_RSSI_EFFECT_PRIMARY : |
| 804 | SAP_SUBBAND3_RSSI_EFFECT_PRIMARY; |
| 805 | break; |
| 806 | case -4: |
| 807 | case 4: |
| 808 | rsssi_effect = |
| 809 | SAP_24GHZ_FOURTH_OVERLAP_CHAN_RSSI_EFFECT_PRIMARY; |
| 810 | break; |
| 811 | default: |
| 812 | rsssi_effect = 0; |
| 813 | break; |
| 814 | } |
| 815 | |
| 816 | rssi = pSpectCh->rssiAgr + rsssi_effect; |
| 817 | if (IS_RSSI_VALID(pExtSpectCh->rssiAgr, rssi)) |
| 818 | pExtSpectCh->rssiAgr = rssi; |
| 819 | if (pExtSpectCh->rssiAgr < SOFTAP_MIN_RSSI) |
| 820 | pExtSpectCh->rssiAgr = SOFTAP_MIN_RSSI; |
| 821 | } |
| 822 | } |
| 823 | |
| 824 | /** |
| 825 | * sap_upd_chan_spec_params() - sap_upd_chan_spec_params |
| 826 | * updates channel parameters obtained from Beacon |
| 827 | * @pBeaconStruct Beacon strucutre populated by parse_beacon function |
| 828 | * @channelWidth Channel width |
| 829 | * @secondaryChannelOffset Secondary Channel Offset |
| 830 | * @vhtSupport If channel supports VHT |
| 831 | * @centerFreq Central frequency for the given channel. |
| 832 | * |
| 833 | * sap_upd_chan_spec_params updates the spectrum channels based on the |
| 834 | * pBeaconStruct obtained from Beacon IE |
| 835 | * |
| 836 | * Return: NA. |
| 837 | */ |
| 838 | |
| 839 | void sap_upd_chan_spec_params(tSirProbeRespBeacon *pBeaconStruct, |
| 840 | uint16_t *channelWidth, |
| 841 | uint16_t *secondaryChannelOffset, |
| 842 | uint16_t *vhtSupport, |
| 843 | uint16_t *centerFreq) |
| 844 | { |
| 845 | if (NULL == pBeaconStruct) { |
| 846 | CDF_TRACE(CDF_MODULE_ID_SAP, CDF_TRACE_LEVEL_ERROR, |
| 847 | FL("pBeaconStruct is NULL")); |
| 848 | return; |
| 849 | } |
| 850 | |
| 851 | if (pBeaconStruct->HTCaps.present && pBeaconStruct->HTInfo.present) { |
| 852 | *channelWidth = pBeaconStruct->HTCaps.supportedChannelWidthSet; |
| 853 | *secondaryChannelOffset = pBeaconStruct->HTInfo. |
| 854 | secondaryChannelOffset; |
| 855 | |
| 856 | if (pBeaconStruct->VHTOperation.present) { |
| 857 | *vhtSupport = pBeaconStruct->VHTOperation.present; |
| 858 | if (pBeaconStruct->VHTOperation.chanWidth > |
| 859 | WNI_CFG_VHT_CHANNEL_WIDTH_20_40MHZ) { |
| 860 | *channelWidth = eHT_CHANNEL_WIDTH_80MHZ; |
| 861 | *centerFreq = pBeaconStruct->VHTOperation. |
| 862 | chanCenterFreqSeg1; |
| 863 | } |
| 864 | } |
| 865 | } |
| 866 | } |
| 867 | |
| 868 | /** |
| 869 | * sap_interference_rssi_count_5G() - sap_interference_rssi_count |
| 870 | * considers the Adjacent channel rssi and |
| 871 | * data count(here number of BSS observed) |
| 872 | * @spect_ch: Channel Information |
| 873 | * @chan_width: Channel width parsed from beacon IE |
| 874 | * @sec_chan_offset: Secondary Channel Offset |
| 875 | * @center_freq: Central frequency for the given channel. |
| 876 | * @channel_id: channel_id |
| 877 | * |
| 878 | * sap_interference_rssi_count_5G considers the Adjacent channel rssi |
| 879 | * and data count(here number of BSS observed) |
| 880 | * |
| 881 | * Return: NA. |
| 882 | */ |
| 883 | |
| 884 | void sap_interference_rssi_count_5G(tSapSpectChInfo *spect_ch, |
| 885 | uint16_t chan_width, |
| 886 | uint16_t sec_chan_offset, |
| 887 | uint16_t center_freq, uint8_t channel_id) |
| 888 | { |
| 889 | if (NULL == spect_ch) { |
| 890 | CDF_TRACE(CDF_MODULE_ID_SAP, CDF_TRACE_LEVEL_ERROR, |
| 891 | FL("spect_ch is NULL")); |
| 892 | return; |
| 893 | } |
| 894 | |
| 895 | /* Updating the received ChannelWidth */ |
| 896 | if (spect_ch->channelWidth != chan_width) |
| 897 | spect_ch->channelWidth = chan_width; |
| 898 | /* If received ChannelWidth is other than HT20, |
| 899 | * we need to update the extension channel Params as well |
| 900 | * chan_width == 0, HT20 |
| 901 | * chan_width == 1, HT40 |
| 902 | * chan_width == 2, VHT80 |
| 903 | */ |
| 904 | |
| 905 | switch (spect_ch->channelWidth) { |
| 906 | case eHT_CHANNEL_WIDTH_40MHZ: /* HT40 */ |
| 907 | switch (sec_chan_offset) { |
| 908 | /* Above the Primary Channel */ |
| 909 | case PHY_DOUBLE_CHANNEL_LOW_PRIMARY: |
| 910 | sap_update_rssi_bsscount(spect_ch, 1, false); |
| 911 | break; |
| 912 | |
| 913 | /* Below the Primary channel */ |
| 914 | case PHY_DOUBLE_CHANNEL_HIGH_PRIMARY: |
| 915 | sap_update_rssi_bsscount(spect_ch, -1, false); |
| 916 | break; |
| 917 | } |
| 918 | break; |
| 919 | case eHT_CHANNEL_WIDTH_80MHZ: /* VHT80 */ |
| 920 | if ((center_freq - channel_id) == 6) { |
| 921 | sap_update_rssi_bsscount(spect_ch, 1, false); |
| 922 | sap_update_rssi_bsscount(spect_ch, 2, false); |
| 923 | sap_update_rssi_bsscount(spect_ch, 3, false); |
| 924 | } else if ((center_freq - channel_id) == 2) { |
| 925 | sap_update_rssi_bsscount(spect_ch, -1, false); |
| 926 | sap_update_rssi_bsscount(spect_ch, 1, false); |
| 927 | sap_update_rssi_bsscount(spect_ch, 2, false); |
| 928 | } else if ((center_freq - channel_id) == -2) { |
| 929 | sap_update_rssi_bsscount(spect_ch, -2, false); |
| 930 | sap_update_rssi_bsscount(spect_ch, -1, false); |
| 931 | sap_update_rssi_bsscount(spect_ch, 1, false); |
| 932 | } else if ((center_freq - channel_id) == -6) { |
| 933 | sap_update_rssi_bsscount(spect_ch, -1, false); |
| 934 | sap_update_rssi_bsscount(spect_ch, -2, false); |
| 935 | sap_update_rssi_bsscount(spect_ch, -3, false); |
| 936 | } |
| 937 | break; |
| 938 | default: |
| 939 | break; |
| 940 | } |
| 941 | } |
| 942 | |
| 943 | /** |
| 944 | * sap_interference_rssi_count() - sap_interference_rssi_count |
| 945 | * considers the Adjacent channel rssi |
| 946 | * and data count(here number of BSS observed) |
| 947 | * @spect_ch Channel Information |
| 948 | * |
| 949 | * sap_interference_rssi_count considers the Adjacent channel rssi |
| 950 | * and data count(here number of BSS observed) |
| 951 | * |
| 952 | * Return: None. |
| 953 | */ |
| 954 | |
| 955 | void sap_interference_rssi_count(tSapSpectChInfo *spect_ch) |
| 956 | { |
| 957 | if (NULL == spect_ch) { |
| 958 | CDF_TRACE(CDF_MODULE_ID_SAP, CDF_TRACE_LEVEL_ERROR, |
| 959 | "%s: spect_ch is NULL", __func__); |
| 960 | return; |
| 961 | } |
| 962 | |
| 963 | switch (spect_ch->chNum) { |
| 964 | case CHANNEL_1: |
| 965 | sap_update_rssi_bsscount(spect_ch, 1, true); |
| 966 | sap_update_rssi_bsscount(spect_ch, 2, true); |
| 967 | sap_update_rssi_bsscount(spect_ch, 3, true); |
| 968 | sap_update_rssi_bsscount(spect_ch, 4, true); |
| 969 | break; |
| 970 | |
| 971 | case CHANNEL_2: |
| 972 | sap_update_rssi_bsscount(spect_ch, -1, true); |
| 973 | sap_update_rssi_bsscount(spect_ch, 1, true); |
| 974 | sap_update_rssi_bsscount(spect_ch, 2, true); |
| 975 | sap_update_rssi_bsscount(spect_ch, 3, true); |
| 976 | sap_update_rssi_bsscount(spect_ch, 4, true); |
| 977 | break; |
| 978 | case CHANNEL_3: |
| 979 | sap_update_rssi_bsscount(spect_ch, -2, true); |
| 980 | sap_update_rssi_bsscount(spect_ch, -1, true); |
| 981 | sap_update_rssi_bsscount(spect_ch, 1, true); |
| 982 | sap_update_rssi_bsscount(spect_ch, 2, true); |
| 983 | sap_update_rssi_bsscount(spect_ch, 3, true); |
| 984 | sap_update_rssi_bsscount(spect_ch, 4, true); |
| 985 | break; |
| 986 | case CHANNEL_4: |
| 987 | sap_update_rssi_bsscount(spect_ch, -3, true); |
| 988 | sap_update_rssi_bsscount(spect_ch, -2, true); |
| 989 | sap_update_rssi_bsscount(spect_ch, -1, true); |
| 990 | sap_update_rssi_bsscount(spect_ch, 1, true); |
| 991 | sap_update_rssi_bsscount(spect_ch, 2, true); |
| 992 | sap_update_rssi_bsscount(spect_ch, 3, true); |
| 993 | sap_update_rssi_bsscount(spect_ch, 4, true); |
| 994 | break; |
| 995 | |
| 996 | case CHANNEL_5: |
| 997 | case CHANNEL_6: |
| 998 | case CHANNEL_7: |
| 999 | case CHANNEL_8: |
| 1000 | case CHANNEL_9: |
| 1001 | case CHANNEL_10: |
| 1002 | sap_update_rssi_bsscount(spect_ch, -4, true); |
| 1003 | sap_update_rssi_bsscount(spect_ch, -3, true); |
| 1004 | sap_update_rssi_bsscount(spect_ch, -2, true); |
| 1005 | sap_update_rssi_bsscount(spect_ch, -1, true); |
| 1006 | sap_update_rssi_bsscount(spect_ch, 1, true); |
| 1007 | sap_update_rssi_bsscount(spect_ch, 2, true); |
| 1008 | sap_update_rssi_bsscount(spect_ch, 3, true); |
| 1009 | sap_update_rssi_bsscount(spect_ch, 4, true); |
| 1010 | break; |
| 1011 | |
| 1012 | case CHANNEL_11: |
| 1013 | sap_update_rssi_bsscount(spect_ch, -4, true); |
| 1014 | sap_update_rssi_bsscount(spect_ch, -3, true); |
| 1015 | sap_update_rssi_bsscount(spect_ch, -2, true); |
| 1016 | sap_update_rssi_bsscount(spect_ch, -1, true); |
| 1017 | sap_update_rssi_bsscount(spect_ch, 1, true); |
| 1018 | sap_update_rssi_bsscount(spect_ch, 2, true); |
| 1019 | sap_update_rssi_bsscount(spect_ch, 3, true); |
| 1020 | break; |
| 1021 | |
| 1022 | case CHANNEL_12: |
| 1023 | sap_update_rssi_bsscount(spect_ch, -4, true); |
| 1024 | sap_update_rssi_bsscount(spect_ch, -3, true); |
| 1025 | sap_update_rssi_bsscount(spect_ch, -2, true); |
| 1026 | sap_update_rssi_bsscount(spect_ch, -1, true); |
| 1027 | sap_update_rssi_bsscount(spect_ch, 1, true); |
| 1028 | sap_update_rssi_bsscount(spect_ch, 2, true); |
| 1029 | break; |
| 1030 | |
| 1031 | case CHANNEL_13: |
| 1032 | sap_update_rssi_bsscount(spect_ch, -4, true); |
| 1033 | sap_update_rssi_bsscount(spect_ch, -3, true); |
| 1034 | sap_update_rssi_bsscount(spect_ch, -2, true); |
| 1035 | sap_update_rssi_bsscount(spect_ch, -1, true); |
| 1036 | sap_update_rssi_bsscount(spect_ch, 1, true); |
| 1037 | break; |
| 1038 | |
| 1039 | case CHANNEL_14: |
| 1040 | sap_update_rssi_bsscount(spect_ch, -4, true); |
| 1041 | sap_update_rssi_bsscount(spect_ch, -3, true); |
| 1042 | sap_update_rssi_bsscount(spect_ch, -2, true); |
| 1043 | sap_update_rssi_bsscount(spect_ch, -1, true); |
| 1044 | break; |
| 1045 | |
| 1046 | default: |
| 1047 | break; |
| 1048 | } |
| 1049 | } |
| 1050 | |
| 1051 | /*========================================================================== |
| 1052 | Function ch_in_pcl |
| 1053 | |
| 1054 | Description |
| 1055 | Check if a channel is in the preferred channel list |
| 1056 | |
| 1057 | Parameters |
| 1058 | sap_ctx SAP context pointer |
| 1059 | channel input channel number |
| 1060 | |
| 1061 | Return Value |
| 1062 | true: channel is in PCL |
| 1063 | false: channel is not in PCL |
| 1064 | ==========================================================================*/ |
| 1065 | bool ch_in_pcl(ptSapContext sap_ctx, uint8_t channel) |
| 1066 | { |
| 1067 | uint32_t i; |
| 1068 | |
| 1069 | for (i = 0; i < sap_ctx->acs_cfg->pcl_ch_count; i++) { |
| 1070 | if (channel == sap_ctx->acs_cfg->pcl_channels[i]) |
| 1071 | return true; |
| 1072 | } |
| 1073 | |
| 1074 | return false; |
| 1075 | } |
| 1076 | |
| 1077 | /*========================================================================== |
| 1078 | FUNCTION sap_compute_spect_weight |
| 1079 | |
| 1080 | DESCRIPTION |
| 1081 | Main function for computing the weight of each channel in the |
| 1082 | spectrum based on the RSSI value of the BSSes on the channel |
| 1083 | and number of BSS |
| 1084 | |
| 1085 | DEPENDENCIES |
| 1086 | NA. |
| 1087 | |
| 1088 | PARAMETERS |
| 1089 | |
| 1090 | IN |
| 1091 | pSpectInfoParams : Pointer to the tSpectInfoParams structure |
| 1092 | halHandle : Pointer to HAL handle |
| 1093 | pResult : Pointer to tScanResultHandle |
| 1094 | |
| 1095 | RETURN VALUE |
| 1096 | void : NULL |
| 1097 | |
| 1098 | SIDE EFFECTS |
| 1099 | ============================================================================*/ |
| 1100 | void sap_compute_spect_weight(tSapChSelSpectInfo *pSpectInfoParams, |
| 1101 | tHalHandle halHandle, tScanResultHandle pResult, |
| 1102 | ptSapContext sap_ctx) |
| 1103 | { |
| 1104 | int8_t rssi = 0; |
| 1105 | uint8_t chn_num = 0; |
| 1106 | uint8_t channel_id = 0; |
| 1107 | |
| 1108 | tCsrScanResultInfo *pScanResult; |
| 1109 | tSapSpectChInfo *pSpectCh = pSpectInfoParams->pSpectCh; |
| 1110 | uint32_t operatingBand; |
| 1111 | uint16_t channelWidth; |
| 1112 | uint16_t secondaryChannelOffset; |
| 1113 | uint16_t centerFreq; |
| 1114 | uint16_t vhtSupport; |
| 1115 | uint32_t ieLen = 0; |
| 1116 | tSirProbeRespBeacon *pBeaconStruct; |
| 1117 | tpAniSirGlobal pMac = (tpAniSirGlobal) halHandle; |
| 1118 | |
| 1119 | pBeaconStruct = cdf_mem_malloc(sizeof(tSirProbeRespBeacon)); |
| 1120 | if (NULL == pBeaconStruct) { |
| 1121 | CDF_TRACE(CDF_MODULE_ID_SAP, CDF_TRACE_LEVEL_INFO_HIGH, |
| 1122 | "Unable to allocate memory in sap_compute_spect_weight\n"); |
| 1123 | return; |
| 1124 | } |
| 1125 | CDF_TRACE(CDF_MODULE_ID_SAP, CDF_TRACE_LEVEL_INFO_HIGH, |
| 1126 | "In %s, Computing spectral weight", __func__); |
| 1127 | |
| 1128 | /** |
| 1129 | * Soft AP specific channel weight calculation using DFS formula |
| 1130 | */ |
| 1131 | SET_ACS_BAND(operatingBand, sap_ctx); |
| 1132 | |
| 1133 | pScanResult = sme_scan_result_get_first(halHandle, pResult); |
| 1134 | |
| 1135 | while (pScanResult) { |
| 1136 | pSpectCh = pSpectInfoParams->pSpectCh; |
| 1137 | /* Defining the default values, so that any value will hold the default values */ |
| 1138 | channelWidth = eHT_CHANNEL_WIDTH_20MHZ; |
| 1139 | secondaryChannelOffset = PHY_SINGLE_CHANNEL_CENTERED; |
| 1140 | vhtSupport = 0; |
| 1141 | centerFreq = 0; |
| 1142 | |
| 1143 | if (pScanResult->BssDescriptor.ieFields != NULL) { |
| 1144 | ieLen = |
| 1145 | (pScanResult->BssDescriptor.length + |
| 1146 | sizeof(uint16_t) + sizeof(uint32_t) - |
| 1147 | sizeof(tSirBssDescription)); |
| 1148 | cdf_mem_set((uint8_t *) pBeaconStruct, |
| 1149 | sizeof(tSirProbeRespBeacon), 0); |
| 1150 | |
| 1151 | if ((sir_parse_beacon_ie |
| 1152 | (pMac, pBeaconStruct, |
| 1153 | (uint8_t *) (pScanResult->BssDescriptor.ieFields), |
| 1154 | ieLen)) == eSIR_SUCCESS) { |
| 1155 | sap_upd_chan_spec_params(pBeaconStruct, |
| 1156 | &channelWidth, &secondaryChannelOffset, |
| 1157 | &vhtSupport, ¢erFreq); |
| 1158 | } |
| 1159 | } |
| 1160 | /* Processing for each tCsrScanResultInfo in the tCsrScanResult DLink list */ |
| 1161 | for (chn_num = 0; chn_num < pSpectInfoParams->numSpectChans; |
| 1162 | chn_num++) { |
| 1163 | |
| 1164 | /* |
| 1165 | * if the Beacon has channel ID, use it other wise we will |
| 1166 | * rely on the channelIdSelf |
| 1167 | */ |
| 1168 | if (pScanResult->BssDescriptor.channelId == 0) |
| 1169 | channel_id = |
| 1170 | pScanResult->BssDescriptor.channelIdSelf; |
| 1171 | else |
| 1172 | channel_id = |
| 1173 | pScanResult->BssDescriptor.channelId; |
| 1174 | |
| 1175 | if (pSpectCh && (channel_id == pSpectCh->chNum)) { |
| 1176 | if (pSpectCh->rssiAgr < |
| 1177 | pScanResult->BssDescriptor.rssi) |
| 1178 | pSpectCh->rssiAgr = |
| 1179 | pScanResult->BssDescriptor.rssi; |
| 1180 | |
| 1181 | ++pSpectCh->bssCount; /* Increment the count of BSS */ |
| 1182 | |
| 1183 | /* |
| 1184 | * Connsidering the Extension Channel |
| 1185 | * only in a channels |
| 1186 | */ |
| 1187 | switch (operatingBand) { |
| 1188 | case eCSR_DOT11_MODE_11a: |
| 1189 | sap_interference_rssi_count_5G( |
| 1190 | pSpectCh, channelWidth, |
| 1191 | secondaryChannelOffset, centerFreq, |
| 1192 | channel_id); |
| 1193 | break; |
| 1194 | |
| 1195 | case eCSR_DOT11_MODE_11g: |
| 1196 | sap_interference_rssi_count(pSpectCh); |
| 1197 | break; |
| 1198 | |
| 1199 | case eCSR_DOT11_MODE_abg: |
| 1200 | sap_interference_rssi_count_5G( |
| 1201 | pSpectCh, channelWidth, |
| 1202 | secondaryChannelOffset, centerFreq, |
| 1203 | channel_id); |
| 1204 | sap_interference_rssi_count(pSpectCh); |
| 1205 | break; |
| 1206 | } |
| 1207 | |
| 1208 | CDF_TRACE(CDF_MODULE_ID_SAP, |
| 1209 | CDF_TRACE_LEVEL_INFO_HIGH, |
| 1210 | "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", |
| 1211 | __func__, |
| 1212 | pScanResult->BssDescriptor. |
| 1213 | channelIdSelf, |
| 1214 | pScanResult->BssDescriptor.channelId, |
| 1215 | pScanResult->BssDescriptor.rssi, |
| 1216 | pSpectCh->bssCount, pScanResult, |
| 1217 | pSpectCh->channelWidth, |
| 1218 | secondaryChannelOffset, centerFreq); |
| 1219 | pSpectCh++; |
| 1220 | break; |
| 1221 | } else { |
| 1222 | pSpectCh++; |
| 1223 | } |
| 1224 | } |
| 1225 | |
| 1226 | pScanResult = sme_scan_result_get_next(halHandle, pResult); |
| 1227 | } |
| 1228 | |
| 1229 | /* Calculate the weights for all channels in the spectrum pSpectCh */ |
| 1230 | pSpectCh = pSpectInfoParams->pSpectCh; |
| 1231 | |
| 1232 | CDF_TRACE(CDF_MODULE_ID_SAP, CDF_TRACE_LEVEL_INFO_HIGH, |
| 1233 | "In %s, Spectrum Channels Weight", __func__); |
| 1234 | |
| 1235 | for (chn_num = 0; chn_num < (pSpectInfoParams->numSpectChans); |
| 1236 | chn_num++) { |
| 1237 | |
| 1238 | /* |
| 1239 | rssi : Maximum received signal strength among all BSS on that channel |
| 1240 | bssCount : Number of BSS on that channel |
| 1241 | */ |
| 1242 | |
| 1243 | rssi = (int8_t) pSpectCh->rssiAgr; |
| 1244 | if (ch_in_pcl(sap_ctx, chn_num)) |
| 1245 | rssi -= PCL_RSSI_DISCOUNT; |
| 1246 | |
| 1247 | pSpectCh->weight = |
| 1248 | SAPDFS_NORMALISE_1000 * sapweight_rssi_count(rssi, |
| 1249 | pSpectCh-> |
| 1250 | bssCount); |
| 1251 | pSpectCh->weight_copy = pSpectCh->weight; |
| 1252 | |
| 1253 | /* ------ Debug Info ------ */ |
| 1254 | CDF_TRACE(CDF_MODULE_ID_SAP, CDF_TRACE_LEVEL_INFO_HIGH, |
| 1255 | "In %s, Chan=%d Weight= %d rssiAgr=%d bssCount=%d", |
| 1256 | __func__, pSpectCh->chNum, pSpectCh->weight, |
| 1257 | pSpectCh->rssiAgr, pSpectCh->bssCount); |
| 1258 | /* ------ Debug Info ------ */ |
| 1259 | pSpectCh++; |
| 1260 | } |
| 1261 | cdf_mem_free(pBeaconStruct); |
| 1262 | } |
| 1263 | |
| 1264 | /*========================================================================== |
| 1265 | FUNCTION sap_chan_sel_exit |
| 1266 | |
| 1267 | DESCRIPTION |
| 1268 | Exit function for free out the allocated memory, to be called |
| 1269 | at the end of the dfsSelectChannel function |
| 1270 | |
| 1271 | DEPENDENCIES |
| 1272 | NA. |
| 1273 | |
| 1274 | PARAMETERS |
| 1275 | |
| 1276 | IN |
| 1277 | pSpectInfoParams : Pointer to the tSapChSelSpectInfo structure |
| 1278 | |
| 1279 | RETURN VALUE |
| 1280 | void : NULL |
| 1281 | |
| 1282 | SIDE EFFECTS |
| 1283 | ============================================================================*/ |
| 1284 | void sap_chan_sel_exit(tSapChSelSpectInfo *pSpectInfoParams) |
| 1285 | { |
| 1286 | /* Free all the allocated memory */ |
| 1287 | cdf_mem_free(pSpectInfoParams->pSpectCh); |
| 1288 | } |
| 1289 | |
| 1290 | /*========================================================================== |
| 1291 | FUNCTION sap_sort_chl_weight |
| 1292 | |
| 1293 | DESCRIPTION |
| 1294 | Funtion to sort the channels with the least weight first for 20MHz channels |
| 1295 | |
| 1296 | DEPENDENCIES |
| 1297 | NA. |
| 1298 | |
| 1299 | PARAMETERS |
| 1300 | |
| 1301 | IN |
| 1302 | pSpectInfoParams : Pointer to the tSapChSelSpectInfo structure |
| 1303 | |
| 1304 | RETURN VALUE |
| 1305 | void : NULL |
| 1306 | |
| 1307 | SIDE EFFECTS |
| 1308 | ============================================================================*/ |
| 1309 | void sap_sort_chl_weight(tSapChSelSpectInfo *pSpectInfoParams) |
| 1310 | { |
| 1311 | tSapSpectChInfo temp; |
| 1312 | |
| 1313 | tSapSpectChInfo *pSpectCh = NULL; |
| 1314 | uint32_t i = 0, j = 0, minWeightIndex = 0; |
| 1315 | |
| 1316 | pSpectCh = pSpectInfoParams->pSpectCh; |
| 1317 | for (i = 0; i < pSpectInfoParams->numSpectChans; i++) { |
| 1318 | minWeightIndex = i; |
| 1319 | for (j = i + 1; j < pSpectInfoParams->numSpectChans; j++) { |
| 1320 | if (pSpectCh[j].weight < |
| 1321 | pSpectCh[minWeightIndex].weight) { |
| 1322 | minWeightIndex = j; |
| 1323 | } |
| 1324 | } |
| 1325 | if (minWeightIndex != i) { |
| 1326 | cdf_mem_copy(&temp, &pSpectCh[minWeightIndex], |
| 1327 | sizeof(*pSpectCh)); |
| 1328 | cdf_mem_copy(&pSpectCh[minWeightIndex], &pSpectCh[i], |
| 1329 | sizeof(*pSpectCh)); |
| 1330 | cdf_mem_copy(&pSpectCh[i], &temp, sizeof(*pSpectCh)); |
| 1331 | } |
| 1332 | } |
| 1333 | } |
| 1334 | |
| 1335 | /** |
| 1336 | * sap_sort_chl_weight_ht80() - to sort the channels with the least weight |
| 1337 | * @pSpectInfoParams: Pointer to the tSapChSelSpectInfo structure |
| 1338 | * |
| 1339 | * Funtion to sort the channels with the least weight first for HT80 channels |
| 1340 | * |
| 1341 | * Return: none |
| 1342 | */ |
| 1343 | void sap_sort_chl_weight_ht80(tSapChSelSpectInfo *pSpectInfoParams) |
| 1344 | { |
| 1345 | uint8_t i, j, n; |
| 1346 | tSapSpectChInfo *pSpectInfo; |
| 1347 | uint8_t minIdx; |
| 1348 | |
| 1349 | pSpectInfo = pSpectInfoParams->pSpectCh; |
| 1350 | /* for each HT80 channel, calculate the combined weight of the |
| 1351 | four 20MHz weight */ |
| 1352 | for (i = 0; i < ARRAY_SIZE(acs_ht80_channels); i++) { |
| 1353 | for (j = 0; j < pSpectInfoParams->numSpectChans; j++) { |
| 1354 | if (pSpectInfo[j].chNum == |
| 1355 | acs_ht80_channels[i].chStartNum) |
| 1356 | break; |
| 1357 | } |
| 1358 | if (j == pSpectInfoParams->numSpectChans) |
| 1359 | continue; |
| 1360 | |
| 1361 | if (!(((pSpectInfo[j].chNum + 4) == pSpectInfo[j + 1].chNum) && |
| 1362 | ((pSpectInfo[j].chNum + 8) == |
| 1363 | pSpectInfo[j + 2].chNum) && |
| 1364 | ((pSpectInfo[j].chNum + 12) == |
| 1365 | pSpectInfo[j + 3].chNum))) { |
| 1366 | /* |
| 1367 | * some channels does not exist in pSectInfo array, |
| 1368 | * skip this channel and those in the same HT80 width |
| 1369 | */ |
| 1370 | pSpectInfo[j].weight = SAP_ACS_WEIGHT_MAX * 4; |
| 1371 | if ((pSpectInfo[j].chNum + 4) == |
| 1372 | pSpectInfo[j + 1].chNum) |
| 1373 | pSpectInfo[j + 1].weight = |
| 1374 | SAP_ACS_WEIGHT_MAX * 4; |
| 1375 | if ((pSpectInfo[j].chNum + 8) == |
| 1376 | pSpectInfo[j + 2].chNum) |
| 1377 | pSpectInfo[j + 2].weight = |
| 1378 | SAP_ACS_WEIGHT_MAX * 4; |
| 1379 | if ((pSpectInfo[j].chNum + 12) == |
| 1380 | pSpectInfo[j + 3].chNum) |
| 1381 | pSpectInfo[j + 3].weight = |
| 1382 | SAP_ACS_WEIGHT_MAX * 4; |
| 1383 | continue; |
| 1384 | } |
| 1385 | /*found the channel, add the 4 adjacent channels' weight */ |
| 1386 | acs_ht80_channels[i].weight = pSpectInfo[j].weight + |
| 1387 | pSpectInfo[j + 1].weight + pSpectInfo[j + 2].weight + |
| 1388 | pSpectInfo[j + 3].weight; |
| 1389 | /* find best channel among 4 channels as the primary channel */ |
| 1390 | if ((pSpectInfo[j].weight + pSpectInfo[j + 1].weight) < |
| 1391 | (pSpectInfo[j + 2].weight + pSpectInfo[j + 3].weight)) { |
| 1392 | /* lower 2 channels are better choice */ |
| 1393 | if (pSpectInfo[j].weight < pSpectInfo[j + 1].weight) |
| 1394 | minIdx = 0; |
| 1395 | else |
| 1396 | minIdx = 1; |
| 1397 | } else if (pSpectInfo[j + 2].weight <= |
| 1398 | pSpectInfo[j + 3].weight) { |
| 1399 | /* upper 2 channels are better choice */ |
| 1400 | minIdx = 2; |
| 1401 | } else { |
| 1402 | minIdx = 3; |
| 1403 | } |
| 1404 | |
| 1405 | /* |
| 1406 | * set all 4 channels to max value first, then reset the |
| 1407 | * best channel as the selected primary channel, update its |
| 1408 | * weightage with the combined weight value |
| 1409 | */ |
| 1410 | for (n = 0; n < 4; n++) |
| 1411 | pSpectInfo[j + n].weight = SAP_ACS_WEIGHT_MAX * 4; |
| 1412 | |
| 1413 | pSpectInfo[j + minIdx].weight = acs_ht80_channels[i].weight; |
| 1414 | } |
| 1415 | |
| 1416 | pSpectInfo = pSpectInfoParams->pSpectCh; |
| 1417 | for (j = 0; j < pSpectInfoParams->numSpectChans; j++) { |
| 1418 | if (CHANNEL_165 == pSpectInfo[j].chNum) { |
| 1419 | pSpectInfo[j].weight = SAP_ACS_WEIGHT_MAX * 4; |
| 1420 | break; |
| 1421 | } |
| 1422 | } |
| 1423 | |
| 1424 | pSpectInfo = pSpectInfoParams->pSpectCh; |
| 1425 | for (j = 0; j < (pSpectInfoParams->numSpectChans); j++) { |
| 1426 | CDF_TRACE(CDF_MODULE_ID_SAP, CDF_TRACE_LEVEL_INFO_HIGH, |
| 1427 | FL("Channel=%d Weight= %d rssi=%d bssCount=%d"), |
| 1428 | pSpectInfo->chNum, pSpectInfo->weight, |
| 1429 | pSpectInfo->rssiAgr, pSpectInfo->bssCount); |
| 1430 | pSpectInfo++; |
| 1431 | } |
| 1432 | } |
| 1433 | |
| 1434 | /** |
| 1435 | * sap_sort_chl_weight_ht40_24_g() - to sort channel with the least weight |
| 1436 | * @pSpectInfoParams: Pointer to the tSapChSelSpectInfo structure |
| 1437 | * |
| 1438 | * Funtion to sort the channels with the least weight first for HT40 channels |
| 1439 | * |
| 1440 | * Return: none |
| 1441 | */ |
| 1442 | void sap_sort_chl_weight_ht40_24_g(tSapChSelSpectInfo *pSpectInfoParams) |
| 1443 | { |
| 1444 | uint8_t i, j; |
| 1445 | tSapSpectChInfo *pSpectInfo; |
| 1446 | uint32_t tmpWeight1, tmpWeight2; |
| 1447 | |
| 1448 | pSpectInfo = pSpectInfoParams->pSpectCh; |
| 1449 | /* |
| 1450 | * for each HT40 channel, calculate the combined weight of the |
| 1451 | * two 20MHz weight |
| 1452 | */ |
| 1453 | for (i = 0; i < ARRAY_SIZE(acs_ht40_channels24_g); i++) { |
| 1454 | for (j = 0; j < pSpectInfoParams->numSpectChans; j++) { |
| 1455 | if (pSpectInfo[j].chNum == |
| 1456 | acs_ht40_channels24_g[i].chStartNum) |
| 1457 | break; |
| 1458 | } |
| 1459 | if (j == pSpectInfoParams->numSpectChans) |
| 1460 | continue; |
| 1461 | |
| 1462 | if (!((pSpectInfo[j].chNum + 4) == pSpectInfo[j + 4].chNum)) { |
| 1463 | pSpectInfo[j].weight = SAP_ACS_WEIGHT_MAX * 2; |
| 1464 | continue; |
| 1465 | } |
| 1466 | /* |
| 1467 | * check if there is another channel combination possiblity |
| 1468 | * e.g., {1, 5} & {5, 9} |
| 1469 | */ |
| 1470 | if ((pSpectInfo[j + 4].chNum + 4) == pSpectInfo[j + 8].chNum) { |
| 1471 | /* need to compare two channel pairs */ |
| 1472 | tmpWeight1 = pSpectInfo[j].weight + |
| 1473 | pSpectInfo[j + 4].weight; |
| 1474 | tmpWeight2 = pSpectInfo[j + 4].weight + |
| 1475 | pSpectInfo[j + 8].weight; |
| 1476 | if (tmpWeight1 <= tmpWeight2) { |
| 1477 | if (pSpectInfo[j].weight <= |
| 1478 | pSpectInfo[j + 4].weight) { |
| 1479 | pSpectInfo[j].weight = |
| 1480 | tmpWeight1; |
| 1481 | pSpectInfo[j + 4].weight = |
| 1482 | SAP_ACS_WEIGHT_MAX * 2; |
| 1483 | pSpectInfo[j + 8].weight = |
| 1484 | SAP_ACS_WEIGHT_MAX * 2; |
| 1485 | } else { |
| 1486 | pSpectInfo[j + 4].weight = |
| 1487 | tmpWeight1; |
| 1488 | /* for secondary channel selection */ |
| 1489 | pSpectInfo[j].weight = |
| 1490 | SAP_ACS_WEIGHT_MAX * 2 |
| 1491 | - 1; |
| 1492 | pSpectInfo[j + 8].weight = |
| 1493 | SAP_ACS_WEIGHT_MAX * 2; |
| 1494 | } |
| 1495 | } else { |
| 1496 | if (pSpectInfo[j + 4].weight <= |
| 1497 | pSpectInfo[j + 8].weight) { |
| 1498 | pSpectInfo[j + 4].weight = |
| 1499 | tmpWeight2; |
| 1500 | pSpectInfo[j].weight = |
| 1501 | SAP_ACS_WEIGHT_MAX * 2; |
| 1502 | /* for secondary channel selection */ |
| 1503 | pSpectInfo[j + 8].weight = |
| 1504 | SAP_ACS_WEIGHT_MAX * 2 |
| 1505 | - 1; |
| 1506 | } else { |
| 1507 | pSpectInfo[j + 8].weight = |
| 1508 | tmpWeight2; |
| 1509 | pSpectInfo[j].weight = |
| 1510 | SAP_ACS_WEIGHT_MAX * 2; |
| 1511 | pSpectInfo[j + 4].weight = |
| 1512 | SAP_ACS_WEIGHT_MAX * 2; |
| 1513 | } |
| 1514 | } |
| 1515 | } else { |
| 1516 | tmpWeight1 = pSpectInfo[j].weight + |
| 1517 | pSpectInfo[j + 4].weight; |
| 1518 | if (pSpectInfo[j].weight <= |
| 1519 | pSpectInfo[j + 4].weight) { |
| 1520 | pSpectInfo[j].weight = tmpWeight1; |
| 1521 | pSpectInfo[j + 4].weight = |
| 1522 | SAP_ACS_WEIGHT_MAX * 2; |
| 1523 | } else { |
| 1524 | pSpectInfo[j + 4].weight = tmpWeight1; |
| 1525 | pSpectInfo[j].weight = |
| 1526 | SAP_ACS_WEIGHT_MAX * 2; |
| 1527 | } |
| 1528 | } |
| 1529 | } |
| 1530 | } |
| 1531 | |
| 1532 | /*========================================================================== |
| 1533 | FUNCTION sap_sort_chl_weight_ht40_5_g |
| 1534 | |
| 1535 | DESCRIPTION |
| 1536 | Funtion to sort the channels with the least weight first for HT40 channels |
| 1537 | |
| 1538 | DEPENDENCIES |
| 1539 | NA. |
| 1540 | |
| 1541 | PARAMETERS |
| 1542 | |
| 1543 | IN |
| 1544 | pSpectInfoParams : Pointer to the tSapChSelSpectInfo structure |
| 1545 | |
| 1546 | RETURN VALUE |
| 1547 | void : NULL |
| 1548 | |
| 1549 | SIDE EFFECTS |
| 1550 | ============================================================================*/ |
| 1551 | void sap_sort_chl_weight_ht40_5_g(tSapChSelSpectInfo *pSpectInfoParams) |
| 1552 | { |
| 1553 | uint8_t i, j; |
| 1554 | tSapSpectChInfo *pSpectInfo; |
| 1555 | |
| 1556 | pSpectInfo = pSpectInfoParams->pSpectCh; |
| 1557 | /*for each HT40 channel, calculate the combined weight of the |
| 1558 | two 20MHz weight */ |
| 1559 | for (i = 0; i < ARRAY_SIZE(acs_ht40_channels5_g); i++) { |
| 1560 | for (j = 0; j < pSpectInfoParams->numSpectChans; j++) { |
| 1561 | if (pSpectInfo[j].chNum == |
| 1562 | acs_ht40_channels5_g[i].chStartNum) |
| 1563 | break; |
| 1564 | } |
| 1565 | if (j == pSpectInfoParams->numSpectChans) |
| 1566 | continue; |
| 1567 | |
| 1568 | /* found the channel, add the two adjacent channels' weight */ |
| 1569 | if ((pSpectInfo[j].chNum + 4) == pSpectInfo[j + 1].chNum) { |
| 1570 | acs_ht40_channels5_g[i].weight = pSpectInfo[j].weight + |
| 1571 | pSpectInfo[j + 1].weight; |
| 1572 | /* select better of the adjact channel as the primary channel */ |
| 1573 | if (pSpectInfo[j].weight <= pSpectInfo[j + 1].weight) { |
| 1574 | pSpectInfo[j].weight = |
| 1575 | acs_ht40_channels5_g[i].weight; |
| 1576 | /* mark the adjacent channel's weight as max value so |
| 1577 | that it will be sorted to the bottom */ |
| 1578 | pSpectInfo[j + 1].weight = |
| 1579 | SAP_ACS_WEIGHT_MAX * 2; |
| 1580 | } else { |
| 1581 | pSpectInfo[j + 1].weight = |
| 1582 | acs_ht40_channels5_g[i].weight; |
| 1583 | /* mark the adjacent channel's weight as max value so |
| 1584 | that it will be sorted to the bottom */ |
| 1585 | pSpectInfo[j].weight = SAP_ACS_WEIGHT_MAX * 2; |
| 1586 | } |
| 1587 | |
| 1588 | } else |
| 1589 | pSpectInfo[j].weight = SAP_ACS_WEIGHT_MAX * 2; |
| 1590 | } |
| 1591 | |
| 1592 | /* avoid channel 165 by setting its weight to max */ |
| 1593 | pSpectInfo = pSpectInfoParams->pSpectCh; |
| 1594 | for (j = 0; j < pSpectInfoParams->numSpectChans; j++) { |
| 1595 | if (CHANNEL_165 == pSpectInfo[j].chNum) { |
| 1596 | pSpectInfo[j].weight = SAP_ACS_WEIGHT_MAX * 2; |
| 1597 | break; |
| 1598 | } |
| 1599 | } |
| 1600 | |
| 1601 | pSpectInfo = pSpectInfoParams->pSpectCh; |
| 1602 | for (j = 0; j < (pSpectInfoParams->numSpectChans); j++) { |
| 1603 | CDF_TRACE(CDF_MODULE_ID_SAP, CDF_TRACE_LEVEL_INFO_HIGH, |
| 1604 | "In %s, Channel=%d Weight= %d rssi=%d bssCount=%d", |
| 1605 | __func__, pSpectInfo->chNum, pSpectInfo->weight, |
| 1606 | pSpectInfo->rssiAgr, pSpectInfo->bssCount); |
| 1607 | pSpectInfo++; |
| 1608 | } |
| 1609 | |
| 1610 | sap_sort_chl_weight(pSpectInfoParams); |
| 1611 | } |
| 1612 | |
| 1613 | /*========================================================================== |
| 1614 | FUNCTION sap_sort_chl_weight_all |
| 1615 | |
| 1616 | DESCRIPTION |
| 1617 | Funtion to sort the channels with the least weight first |
| 1618 | |
| 1619 | DEPENDENCIES |
| 1620 | NA. |
| 1621 | |
| 1622 | PARAMETERS |
| 1623 | |
| 1624 | IN |
| 1625 | ptSapContext : Pointer to the ptSapContext structure |
| 1626 | pSpectInfoParams : Pointer to the tSapChSelSpectInfo structure |
| 1627 | |
| 1628 | RETURN VALUE |
| 1629 | void : NULL |
| 1630 | |
| 1631 | SIDE EFFECTS |
| 1632 | ============================================================================*/ |
| 1633 | void sap_sort_chl_weight_all(ptSapContext pSapCtx, |
| 1634 | tSapChSelSpectInfo *pSpectInfoParams, |
| 1635 | uint32_t operatingBand) |
| 1636 | { |
| 1637 | tSapSpectChInfo *pSpectCh = NULL; |
| 1638 | uint32_t j = 0; |
| 1639 | #ifndef SOFTAP_CHANNEL_RANGE |
| 1640 | uint32_t i = 0; |
| 1641 | #endif |
| 1642 | |
| 1643 | pSpectCh = pSpectInfoParams->pSpectCh; |
| 1644 | #ifdef SOFTAP_CHANNEL_RANGE |
| 1645 | |
| 1646 | switch (pSapCtx->acs_cfg->ch_width) { |
| 1647 | case CH_WIDTH_40MHZ: |
| 1648 | if (eCSR_DOT11_MODE_11g == operatingBand) |
| 1649 | sap_sort_chl_weight_ht40_24_g(pSpectInfoParams); |
| 1650 | else if (eCSR_DOT11_MODE_11a == operatingBand) |
| 1651 | sap_sort_chl_weight_ht40_5_g(pSpectInfoParams); |
| 1652 | else { |
| 1653 | sap_sort_chl_weight_ht40_24_g(pSpectInfoParams); |
| 1654 | sap_sort_chl_weight_ht40_5_g(pSpectInfoParams); |
| 1655 | } |
| 1656 | sap_sort_chl_weight(pSpectInfoParams); |
| 1657 | break; |
| 1658 | |
| 1659 | case CH_WIDTH_80MHZ: |
| 1660 | sap_sort_chl_weight_ht80(pSpectInfoParams); |
| 1661 | break; |
| 1662 | |
| 1663 | case CH_WIDTH_20MHZ: |
| 1664 | default: |
| 1665 | /* Sorting the channels as per weights as 20MHz channels */ |
| 1666 | sap_sort_chl_weight(pSpectInfoParams); |
| 1667 | } |
| 1668 | |
| 1669 | #else |
| 1670 | /* Sorting the channels as per weights */ |
| 1671 | for (i = 0; i < SPECT_24GHZ_CH_COUNT; i++) { |
| 1672 | minWeightIndex = i; |
| 1673 | for (j = i + 1; j < SPECT_24GHZ_CH_COUNT; j++) { |
| 1674 | if (pSpectCh[j].weight < |
| 1675 | pSpectCh[minWeightIndex].weight) { |
| 1676 | minWeightIndex = j; |
| 1677 | } |
| 1678 | } |
| 1679 | if (minWeightIndex != i) { |
| 1680 | cdf_mem_copy(&temp, &pSpectCh[minWeightIndex], |
| 1681 | sizeof(*pSpectCh)); |
| 1682 | cdf_mem_copy(&pSpectCh[minWeightIndex], &pSpectCh[i], |
| 1683 | sizeof(*pSpectCh)); |
| 1684 | cdf_mem_copy(&pSpectCh[i], &temp, sizeof(*pSpectCh)); |
| 1685 | } |
| 1686 | } |
| 1687 | #endif |
| 1688 | |
| 1689 | /* For testing */ |
| 1690 | CDF_TRACE(CDF_MODULE_ID_SAP, CDF_TRACE_LEVEL_INFO_HIGH, |
| 1691 | "In %s, Sorted Spectrum Channels Weight", __func__); |
| 1692 | pSpectCh = pSpectInfoParams->pSpectCh; |
| 1693 | for (j = 0; j < (pSpectInfoParams->numSpectChans); j++) { |
| 1694 | CDF_TRACE(CDF_MODULE_ID_SAP, CDF_TRACE_LEVEL_INFO_HIGH, |
| 1695 | "In %s, Channel=%d Weight= %d rssi=%d bssCount=%d", |
| 1696 | __func__, pSpectCh->chNum, pSpectCh->weight, |
| 1697 | pSpectCh->rssiAgr, pSpectCh->bssCount); |
| 1698 | pSpectCh++; |
| 1699 | } |
| 1700 | |
| 1701 | } |
| 1702 | |
| 1703 | /*========================================================================== |
| 1704 | FUNCTION sap_filter_over_lap_ch |
| 1705 | |
| 1706 | DESCRIPTION |
| 1707 | return true if ch is acceptable. |
| 1708 | This function will decide if we will filter over lap channel or not. |
| 1709 | |
| 1710 | DEPENDENCIES |
| 1711 | shall called after ap start. |
| 1712 | |
| 1713 | PARAMETERS |
| 1714 | |
| 1715 | IN |
| 1716 | pSapCtx : Pointer to ptSapContext. |
| 1717 | chNum : Filter channel number. |
| 1718 | |
| 1719 | RETURN VALUE |
| 1720 | bool : true if channel is accepted. |
| 1721 | |
| 1722 | SIDE EFFECTS |
| 1723 | ============================================================================*/ |
| 1724 | bool sap_filter_over_lap_ch(ptSapContext pSapCtx, uint16_t chNum) |
| 1725 | { |
| 1726 | if (pSapCtx->enableOverLapCh) |
| 1727 | return eSAP_TRUE; |
| 1728 | else if ((chNum == CHANNEL_1) || |
| 1729 | (chNum == CHANNEL_6) || (chNum == CHANNEL_11)) |
| 1730 | return eSAP_TRUE; |
| 1731 | |
| 1732 | return eSAP_FALSE; |
| 1733 | } |
| 1734 | |
| 1735 | /*========================================================================== |
| 1736 | FUNCTION sap_select_channel |
| 1737 | |
| 1738 | DESCRIPTION |
| 1739 | Runs a algorithm to select the best channel to operate in based on BSS |
| 1740 | rssi and bss count on each channel |
| 1741 | |
| 1742 | DEPENDENCIES |
| 1743 | NA. |
| 1744 | |
| 1745 | PARAMETERS |
| 1746 | |
| 1747 | IN |
| 1748 | halHandle : Pointer to HAL handle |
| 1749 | pResult : Pointer to tScanResultHandle |
| 1750 | |
| 1751 | RETURN VALUE |
| 1752 | uint8_t : Success - channel number, Fail - zero |
| 1753 | |
| 1754 | SIDE EFFECTS |
| 1755 | ============================================================================*/ |
| 1756 | uint8_t sap_select_channel(tHalHandle halHandle, ptSapContext pSapCtx, |
| 1757 | tScanResultHandle pScanResult) |
| 1758 | { |
| 1759 | /* DFS param object holding all the data req by the algo */ |
| 1760 | tSapChSelSpectInfo oSpectInfoParams = { NULL, 0 }; |
| 1761 | tSapChSelSpectInfo *pSpectInfoParams = &oSpectInfoParams; /* Memory? NB */ |
| 1762 | uint8_t bestChNum = SAP_CHANNEL_NOT_SELECTED; |
| 1763 | #ifdef FEATURE_WLAN_CH_AVOID |
| 1764 | uint8_t i; |
| 1765 | uint8_t firstSafeChannelInRange = SAP_CHANNEL_NOT_SELECTED; |
| 1766 | #endif |
| 1767 | #ifdef SOFTAP_CHANNEL_RANGE |
| 1768 | uint32_t startChannelNum; |
| 1769 | uint32_t endChannelNum; |
| 1770 | uint32_t operatingBand = 0; |
| 1771 | uint32_t tmpChNum; |
| 1772 | uint8_t count; |
| 1773 | #endif |
| 1774 | CDF_TRACE(CDF_MODULE_ID_SAP, CDF_TRACE_LEVEL_INFO_HIGH, |
| 1775 | "In %s, Running SAP Ch Select", __func__); |
| 1776 | |
| 1777 | #ifdef FEATURE_WLAN_CH_AVOID |
| 1778 | sap_update_unsafe_channel_list(pSapCtx); |
| 1779 | #endif |
| 1780 | |
| 1781 | if (NULL == pScanResult) { |
| 1782 | CDF_TRACE(CDF_MODULE_ID_SAP, CDF_TRACE_LEVEL_INFO_HIGH, |
| 1783 | "%s: No external AP present\n", __func__); |
| 1784 | |
| 1785 | #ifndef SOFTAP_CHANNEL_RANGE |
| 1786 | return bestChNum; |
| 1787 | #else |
| 1788 | startChannelNum = pSapCtx->acs_cfg->start_ch; |
| 1789 | endChannelNum = pSapCtx->acs_cfg->end_ch; |
| 1790 | |
| 1791 | |
| 1792 | CDF_TRACE(CDF_MODULE_ID_SAP, CDF_TRACE_LEVEL_INFO_HIGH, |
| 1793 | "%s: start - end: %d - %d\n", __func__, |
| 1794 | startChannelNum, endChannelNum); |
| 1795 | |
| 1796 | #ifndef FEATURE_WLAN_CH_AVOID /* FEATURE_WLAN_CH_AVOID NOT defined case */ |
| 1797 | pSapCtx->acs_cfg->pri_ch = startChannelNum; |
| 1798 | pSapCtx->acs_cfg->ht_sec_ch = 0; |
| 1799 | /* pick the first channel in configured range */ |
| 1800 | return startChannelNum; |
| 1801 | #else /* FEATURE_WLAN_CH_AVOID defined */ |
| 1802 | |
| 1803 | /* get a channel in PCL and within the range */ |
| 1804 | for (i = 0; i < pSapCtx->acs_cfg->pcl_ch_count; i++) { |
| 1805 | if ((pSapCtx->acs_cfg->pcl_channels[i] >= |
| 1806 | startChannelNum) |
| 1807 | && (pSapCtx->acs_cfg->pcl_channels[i] <= |
| 1808 | endChannelNum)) { |
| 1809 | firstSafeChannelInRange = |
| 1810 | pSapCtx->acs_cfg->pcl_channels[i]; |
| 1811 | break; |
| 1812 | } |
| 1813 | } |
| 1814 | if (SAP_CHANNEL_NOT_SELECTED != firstSafeChannelInRange) |
| 1815 | return firstSafeChannelInRange; |
| 1816 | |
| 1817 | for (i = 0; i < NUM_20MHZ_RF_CHANNELS; i++) { |
| 1818 | if ((safe_channels[i].channelNumber >= startChannelNum) |
| 1819 | && (safe_channels[i].channelNumber <= |
| 1820 | endChannelNum)) { |
| 1821 | CHANNEL_STATE channel_type = |
| 1822 | cds_get_channel_state(safe_channels[i]. |
| 1823 | channelNumber); |
| 1824 | |
| 1825 | if ((channel_type == CHANNEL_STATE_DISABLE) || |
| 1826 | (channel_type == CHANNEL_STATE_INVALID)) |
| 1827 | continue; |
| 1828 | |
| 1829 | if (safe_channels[i].isSafe == true) { |
| 1830 | CDF_TRACE(CDF_MODULE_ID_SAP, |
| 1831 | CDF_TRACE_LEVEL_INFO_HIGH, |
| 1832 | "%s: channel %d in the configuration is safe\n", |
| 1833 | __func__, |
| 1834 | safe_channels[i]. |
| 1835 | channelNumber); |
| 1836 | firstSafeChannelInRange = |
| 1837 | safe_channels[i].channelNumber; |
| 1838 | break; |
| 1839 | } |
| 1840 | |
| 1841 | CDF_TRACE(CDF_MODULE_ID_SAP, |
| 1842 | CDF_TRACE_LEVEL_INFO_HIGH, |
| 1843 | "%s: channel %d in the configuration is unsafe\n", |
| 1844 | __func__, |
| 1845 | safe_channels[i].channelNumber); |
| 1846 | } |
| 1847 | } |
| 1848 | |
| 1849 | /* if no channel selected return SAP_CHANNEL_NOT_SELECTED */ |
| 1850 | return firstSafeChannelInRange; |
| 1851 | #endif /* !FEATURE_WLAN_CH_AVOID */ |
| 1852 | #endif /* SOFTAP_CHANNEL_RANGE */ |
| 1853 | } |
| 1854 | |
| 1855 | /* Initialize the structure pointed by pSpectInfoParams */ |
| 1856 | if (sap_chan_sel_init(halHandle, pSpectInfoParams, pSapCtx) != eSAP_TRUE) { |
| 1857 | CDF_TRACE(CDF_MODULE_ID_SAP, CDF_TRACE_LEVEL_ERROR, |
| 1858 | "In %s, Ch Select initialization failed", __func__); |
| 1859 | return SAP_CHANNEL_NOT_SELECTED; |
| 1860 | } |
| 1861 | /* Compute the weight of the entire spectrum in the operating band */ |
| 1862 | sap_compute_spect_weight(pSpectInfoParams, halHandle, pScanResult, |
| 1863 | pSapCtx); |
| 1864 | |
| 1865 | #ifdef FEATURE_AP_MCC_CH_AVOIDANCE |
| 1866 | /* process avoid channel IE to collect all channels to avoid */ |
| 1867 | sap_process_avoid_ie(halHandle, pSapCtx, pScanResult, pSpectInfoParams); |
| 1868 | #endif /* FEATURE_AP_MCC_CH_AVOIDANCE */ |
| 1869 | |
| 1870 | #ifdef SOFTAP_CHANNEL_RANGE |
| 1871 | startChannelNum = pSapCtx->acs_cfg->start_ch; |
| 1872 | endChannelNum = pSapCtx->acs_cfg->end_ch; |
| 1873 | SET_ACS_BAND(operatingBand, pSapCtx); |
| 1874 | |
| 1875 | pSapCtx->acsBestChannelInfo.channelNum = 0; |
| 1876 | pSapCtx->acsBestChannelInfo.weight = SAP_ACS_WEIGHT_MAX; |
| 1877 | |
| 1878 | /* Sort the channel list as per the computed weights, lesser weight first. */ |
| 1879 | sap_sort_chl_weight_all(pSapCtx, pSpectInfoParams, operatingBand); |
| 1880 | |
| 1881 | /*Loop till get the best channel in the given range */ |
| 1882 | for (count = 0; count < pSpectInfoParams->numSpectChans; count++) { |
| 1883 | if ((startChannelNum <= pSpectInfoParams->pSpectCh[count].chNum) |
| 1884 | && (endChannelNum >= |
| 1885 | pSpectInfoParams->pSpectCh[count].chNum)) { |
| 1886 | if (bestChNum == SAP_CHANNEL_NOT_SELECTED) { |
| 1887 | bestChNum = |
| 1888 | pSpectInfoParams->pSpectCh[count].chNum; |
| 1889 | /* check if bestChNum is in preferred channel list */ |
| 1890 | bestChNum = |
| 1891 | sap_select_preferred_channel_from_channel_list |
| 1892 | (bestChNum, pSapCtx, pSpectInfoParams); |
| 1893 | if (bestChNum == SAP_CHANNEL_NOT_SELECTED) { |
| 1894 | /* not in preferred channel list, go to next best channel */ |
| 1895 | continue; |
| 1896 | } |
| 1897 | |
| 1898 | #ifdef FEATURE_AP_MCC_CH_AVOIDANCE |
| 1899 | /* Weight of the channels(device's AP is |
| 1900 | * operating) increased to MAX+1 so that they |
| 1901 | * will be choosen only when there is no other |
| 1902 | * best channel to choose |
| 1903 | */ |
| 1904 | if (sap_check_in_avoid_ch_list(pSapCtx, |
| 1905 | bestChNum)) { |
| 1906 | bestChNum = SAP_CHANNEL_NOT_SELECTED; |
| 1907 | continue; |
| 1908 | } |
| 1909 | #endif |
| 1910 | |
| 1911 | pSapCtx->acsBestChannelInfo.channelNum = |
| 1912 | bestChNum; |
| 1913 | pSapCtx->acsBestChannelInfo.weight = |
| 1914 | pSpectInfoParams-> |
| 1915 | pSpectCh[count]. |
| 1916 | weight_copy; |
| 1917 | } |
| 1918 | |
| 1919 | if (bestChNum != SAP_CHANNEL_NOT_SELECTED) { |
| 1920 | if (operatingBand == eCSR_DOT11_MODE_11g) { |
| 1921 | /* Give preference to Non-overlap channels */ |
| 1922 | if (sap_filter_over_lap_ch(pSapCtx, |
| 1923 | pSpectInfoParams-> |
| 1924 | pSpectCh[count]. |
| 1925 | chNum)) { |
| 1926 | tmpChNum = |
| 1927 | pSpectInfoParams-> |
| 1928 | pSpectCh[count].chNum; |
| 1929 | tmpChNum = |
| 1930 | sap_select_preferred_channel_from_channel_list |
| 1931 | (tmpChNum, pSapCtx, |
| 1932 | pSpectInfoParams); |
| 1933 | if (tmpChNum != |
| 1934 | SAP_CHANNEL_NOT_SELECTED) { |
| 1935 | bestChNum = tmpChNum; |
| 1936 | break; |
| 1937 | } |
| 1938 | } |
| 1939 | } |
| 1940 | } |
| 1941 | } |
| 1942 | } |
| 1943 | #else |
| 1944 | /* Sort the channel list as per the computed weights, lesser weight first. */ |
| 1945 | sap_sort_chl_weight_all(pSapCtx, halHandle, pSpectInfoParams); |
| 1946 | /* Get the first channel in sorted array as best 20M Channel */ |
| 1947 | bestChNum = (uint8_t) pSpectInfoParams->pSpectCh[0].chNum; |
| 1948 | /* Select Best Channel from Channel List if Configured */ |
| 1949 | bestChNum = sap_select_preferred_channel_from_channel_list(bestChNum, |
| 1950 | pSapCtx, |
| 1951 | pSpectInfoParams); |
| 1952 | #endif |
| 1953 | |
| 1954 | /** in case the best channel seleted is not in PCL and there is another |
| 1955 | * channel which has same weightage and is in PCL, choose the one in |
| 1956 | * PCL |
| 1957 | */ |
| 1958 | for (count = 0; count < pSpectInfoParams->numSpectChans; count++) { |
| 1959 | /** check if a pcl channel has the same weightage |
| 1960 | * as the best channel |
| 1961 | */ |
| 1962 | if (ch_in_pcl(pSapCtx, pSpectInfoParams->pSpectCh[count].chNum) |
| 1963 | && (pSpectInfoParams->pSpectCh[count].weight == |
| 1964 | pSapCtx->acsBestChannelInfo.weight)) { |
| 1965 | if (sap_select_preferred_channel_from_channel_list( |
| 1966 | pSpectInfoParams->pSpectCh[count].chNum, |
| 1967 | pSapCtx, pSpectInfoParams) == |
| 1968 | SAP_CHANNEL_NOT_SELECTED) |
| 1969 | continue; |
| 1970 | |
| 1971 | #ifdef FEATURE_AP_MCC_CH_AVOIDANCE |
| 1972 | if (sap_check_in_avoid_ch_list(pSapCtx, bestChNum)) |
| 1973 | continue; |
| 1974 | #endif |
| 1975 | bestChNum = pSpectInfoParams->pSpectCh[count].chNum; |
| 1976 | CDF_TRACE(CDF_MODULE_ID_SAP, |
| 1977 | CDF_TRACE_LEVEL_INFO_HIGH, |
| 1978 | "change best channel to %d in PCL", |
| 1979 | bestChNum); |
| 1980 | break; |
| 1981 | } |
| 1982 | } |
| 1983 | |
| 1984 | pSapCtx->acs_cfg->pri_ch = bestChNum; |
| 1985 | /* determine secondary channel for 2.4G channel 5, 6, 7 in HT40 */ |
| 1986 | if ((operatingBand == eCSR_DOT11_MODE_11g) && |
| 1987 | (pSapCtx->acs_cfg->ch_width == CH_WIDTH_40MHZ)) { |
| 1988 | if ((bestChNum >= 5) && (bestChNum <= 7)) { |
| 1989 | int weight_below, weight_above, i; |
| 1990 | tSapSpectChInfo *pspect_info; |
| 1991 | |
| 1992 | weight_below = weight_above = SAP_ACS_WEIGHT_MAX; |
| 1993 | pspect_info = pSpectInfoParams->pSpectCh; |
| 1994 | for (i = 0; i < pSpectInfoParams->numSpectChans; |
| 1995 | i++) { |
| 1996 | if (pspect_info[i].chNum == (bestChNum - 4)) |
| 1997 | weight_below = pspect_info[i].weight; |
| 1998 | |
| 1999 | if (pspect_info[i].chNum == (bestChNum + 4)) |
| 2000 | weight_above = pspect_info[i].weight; |
| 2001 | } |
| 2002 | |
| 2003 | if (weight_below < weight_above) |
| 2004 | pSapCtx->acs_cfg->ht_sec_ch = |
| 2005 | pSapCtx->acs_cfg->pri_ch - 4; |
| 2006 | else |
| 2007 | pSapCtx->acs_cfg->ht_sec_ch = |
| 2008 | pSapCtx->acs_cfg->pri_ch + 4; |
| 2009 | } else if (bestChNum >= 1 && bestChNum <= 4) { |
| 2010 | pSapCtx->acs_cfg->ht_sec_ch = |
| 2011 | pSapCtx->acs_cfg->pri_ch + 4; |
| 2012 | } else if (bestChNum >= 8 && bestChNum <= 13) { |
| 2013 | pSapCtx->acs_cfg->ht_sec_ch = |
| 2014 | pSapCtx->acs_cfg->pri_ch - 4; |
| 2015 | } else if (bestChNum == 14) { |
| 2016 | pSapCtx->acs_cfg->ht_sec_ch = 0; |
| 2017 | } |
| 2018 | pSapCtx->secondary_ch = pSapCtx->acs_cfg->ht_sec_ch; |
| 2019 | } |
| 2020 | /* Free all the allocated memory */ |
| 2021 | sap_chan_sel_exit(pSpectInfoParams); |
| 2022 | |
| 2023 | CDF_TRACE(CDF_MODULE_ID_SAP, CDF_TRACE_LEVEL_INFO_HIGH, |
| 2024 | "In %s, Running SAP Ch select Completed, Ch=%d", __func__, |
| 2025 | bestChNum); |
| 2026 | if (bestChNum > 0 && bestChNum <= 252) |
| 2027 | return bestChNum; |
| 2028 | else |
| 2029 | return SAP_CHANNEL_NOT_SELECTED; |
| 2030 | } |