qcacld-3.0: Introduce INI to disable high HT MCS for 2G STA

To resolve one of IOT issues, introduce INI called
"disable_high_ht_mcs_2x2" which will disable high MCS indices for
2G STA case based on INI value.

Change-Id: I60c5edd89a42f74c0f439fe6a9ab0c75373622b2
CRs-Fixed: 2087438

core/hdd/inc/wlan_hdd_cfg.h

@@ -4546,6 +4546,36 @@ enum hdd_link_speed_rpt_type {
 #define CFG_VHT_ENABLE_2x2_CAP_FEATURE_MAX     (1)
 #define CFG_VHT_ENABLE_2x2_CAP_FEATURE_DEFAULT (0)
 
+/*
+ * <ini>
+ * disable_high_ht_mcs_2x2 - disable high mcs index for 2nd stream in 2.4G
+ * @Min: 0
+ * @Max: 8
+ * @Default: 0
+ *
+ * This ini is used to disable high HT MCS index for 2.4G STA connection.
+ * It has been introduced to resolve IOT issue with one of the vendor.
+ *
+ * Note: This INI is not useful with 1x1 setting. If some platform supports
+ * only 1x1 then this INI is not useful.
+ *
+ * 0 - It won't disable any HT MCS index (just like normal HT MCS)
+ * 1 - It will disable 15th bit from HT RX MCS set (from 8-15 bits slot)
+ * 2 - It will disable 14th & 15th bits from HT RX MCS set
+ * 3 - It will disable 13th, 14th, & 15th bits from HT RX MCS set
+ * and so on.
+ *
+ * Related: STA
+ *
+ * Supported Feature: 11n
+ *
+ * Usage: External
+ */
+#define CFG_DISABLE_HIGH_HT_RX_MCS_2x2         "disable_high_ht_mcs_2x2"
+#define CFG_DISABLE_HIGH_HT_RX_MCS_2x2_MIN     (0)
+#define CFG_DISABLE_HIGH_HT_RX_MCS_2x2_MAX     (8)
+#define CFG_DISABLE_HIGH_HT_RX_MCS_2x2_DEFAULT (0)
+
 /*
  * <ini>
  * gStaPrefer80MHzOver160MHz - set Sta perferance to connect in 80HZ/160HZ
@@ -11419,6 +11449,7 @@ struct hdd_config {
 	bool enable_su_tx_bformer;
 	uint8_t vhtRxMCS2x2;
 	uint8_t vhtTxMCS2x2;
+	uint8_t disable_high_ht_mcs_2x2;
 	bool enable2x2;
 	uint32_t vdev_type_nss_2g;
 	uint32_t vdev_type_nss_5g;

core/hdd/src/wlan_hdd_cfg.c

@@ -2040,6 +2040,13 @@ struct reg_table_entry g_registry_table[] = {
 		     CFG_VHT_ENABLE_2x2_CAP_FEATURE_MIN,
 		     CFG_VHT_ENABLE_2x2_CAP_FEATURE_MAX),
 
+	REG_VARIABLE(CFG_DISABLE_HIGH_HT_RX_MCS_2x2, WLAN_PARAM_Integer,
+		     struct hdd_config, disable_high_ht_mcs_2x2,
+		     VAR_FLAGS_OPTIONAL | VAR_FLAGS_RANGE_CHECK_ASSUME_DEFAULT,
+		     CFG_DISABLE_HIGH_HT_RX_MCS_2x2_DEFAULT,
+		     CFG_DISABLE_HIGH_HT_RX_MCS_2x2_MIN,
+		     CFG_DISABLE_HIGH_HT_RX_MCS_2x2_MAX),
+
 	REG_VARIABLE(CFG_VDEV_TYPE_NSS_2G, WLAN_PARAM_Integer,
 		     struct hdd_config, vdev_type_nss_2g,
 		     VAR_FLAGS_OPTIONAL | VAR_FLAGS_RANGE_CHECK_ASSUME_DEFAULT,
@@ -7674,6 +7681,8 @@ QDF_STATUS hdd_set_sme_config(hdd_context_t *pHddCtx)
 
 	smeConfig->csrConfig.enable_tx_ldpc = pConfig->enable_tx_ldpc;
 	smeConfig->csrConfig.enable_rx_ldpc = pConfig->enable_rx_ldpc;
+	smeConfig->csrConfig.disable_high_ht_mcs_2x2 =
+					pConfig->disable_high_ht_mcs_2x2;
 #ifdef FEATURE_WLAN_MCC_TO_SCC_SWITCH
 	smeConfig->csrConfig.cc_switch_mode = pConfig->WlanMccToSccSwitchMode;
 #endif

core/mac/src/sys/legacy/src/utils/src/parser_api.c

@@ -608,6 +608,7 @@ populate_dot11f_ht_caps(tpAniSirGlobal pMac,
 	uint8_t nCfgValue8;
 	tSirRetStatus nSirStatus;
 	tSirMacHTParametersInfo *pHTParametersInfo;
+	uint8_t disable_high_ht_mcs_2x2 = 0;
 	union {
 		uint16_t nCfgValue16;
 		tSirMacHTCapabilityInfo htCapInfo;
@@ -676,6 +677,11 @@ populate_dot11f_ht_caps(tpAniSirGlobal pMac,
 		    SIZE_OF_SUPPORTED_MCS_SET);
 
 	if (psessionEntry) {
+		disable_high_ht_mcs_2x2 =
+				pMac->roam.configParam.disable_high_ht_mcs_2x2;
+		pe_debug("disable HT high MCS INI param[%d]",
+			 disable_high_ht_mcs_2x2);
+
 		if (pMac->lteCoexAntShare
 		    && (IS_24G_CH(psessionEntry->currentOperChannel))) {
 			if (!(IS_2X2_CHAIN(psessionEntry->chainMask))) {
@@ -686,8 +692,17 @@ populate_dot11f_ht_caps(tpAniSirGlobal pMac,
 				}
 			}
 		}
-		if (psessionEntry->nss == NSS_1x1_MODE)
+		if (psessionEntry->nss == NSS_1x1_MODE) {
 			pDot11f->supportedMCSSet[1] = 0;
+		} else if (IS_24G_CH(psessionEntry->currentOperChannel) &&
+			   disable_high_ht_mcs_2x2 &&
+			   (psessionEntry->pePersona == QDF_STA_MODE)) {
+				pe_debug("Disabling high HT MCS [%d]",
+					 disable_high_ht_mcs_2x2);
+				pDot11f->supportedMCSSet[1] =
+					(pDot11f->supportedMCSSet[1] >>
+						disable_high_ht_mcs_2x2);
+		}
 	}
 
 	/* If STA mode, session supported NSS > 1 and

core/sme/inc/csr_api.h

@@ -1246,6 +1246,7 @@ typedef struct tagCsrConfigParam {
 	uint8_t scanCfgAgingTime;
 	uint8_t enable_tx_ldpc;
 	uint8_t enable_rx_ldpc;
+	uint8_t disable_high_ht_mcs_2x2;
 	uint8_t max_amsdu_num;
 	uint8_t nSelect5GHzMargin;
 	uint8_t isCoalesingInIBSSAllowed;

core/sme/inc/csr_internal.h

@@ -565,6 +565,7 @@ typedef struct tagCsrConfig {
 	bool send_smps_action;
 	uint8_t tx_ldpc_enable;
 	uint8_t rx_ldpc_enable;
+	uint8_t disable_high_ht_mcs_2x2;
 	/*
 	 * Enable/Disable heartbeat offload
 	 */

core/sme/src/csr/csr_api_roam.c

@@ -2689,6 +2689,8 @@ QDF_STATUS csr_change_default_config_param(tpAniSirGlobal pMac,
 			pParam->send_smps_action;
 		pMac->roam.configParam.tx_ldpc_enable = pParam->enable_tx_ldpc;
 		pMac->roam.configParam.rx_ldpc_enable = pParam->enable_rx_ldpc;
+		pMac->roam.configParam.disable_high_ht_mcs_2x2 =
+					pParam->disable_high_ht_mcs_2x2;
 		pMac->roam.configParam.ignore_peer_erp_info =
 			pParam->ignore_peer_erp_info;
 		pMac->roam.configParam.max_amsdu_num =
@@ -2953,6 +2955,7 @@ QDF_STATUS csr_get_config_param(tpAniSirGlobal pMac, tCsrConfigParam *pParam)
 #endif
 	pParam->enable_tx_ldpc = cfg_params->tx_ldpc_enable;
 	pParam->enable_rx_ldpc = cfg_params->rx_ldpc_enable;
+	pParam->disable_high_ht_mcs_2x2 = cfg_params->disable_high_ht_mcs_2x2;
 	pParam->max_amsdu_num = cfg_params->max_amsdu_num;
 	pParam->nSelect5GHzMargin = cfg_params->nSelect5GHzMargin;
 	pParam->isCoalesingInIBSSAllowed = cfg_params->isCoalesingInIBSSAllowed;