qcacld-3.0: Add INI config option to control WMI credits

Add INI option to control consecutive WMI writes. Setting this 1
will essentially serializes the HTC WMI command writes.

Change-Id: I8e28990127f3e4dac2fa91ac9b9df87eed321a2a
CRs-Fixed: 2424795

core/cds/src/cds_api.c

@@ -556,6 +556,7 @@ QDF_STATUS cds_open(struct wlan_objmgr_psoc *psoc)
 		ucfg_pmo_psoc_target_suspend_acknowledge;
 	htcInfo.target_initial_wakeup_cb = ucfg_pmo_psoc_handle_initial_wake_up;
 	htcInfo.target_psoc = (void *)psoc;
+	htcInfo.cfg_wmi_credit_cnt = hdd_ctx->config->cfg_wmi_credit_cnt;
 	qdf_ctx = cds_get_context(QDF_MODULE_ID_QDF_DEVICE);
 
 	/* Create HTC */

core/hdd/inc/hdd_dp_cfg.h

@@ -915,6 +915,32 @@
 #define CFG_DP_ENABLE_NUD_TRACKING_ALL
 #endif
 
+/*
+ * <ini>
+ * gWmiCreditCount - Credit count for WMI exchange
+ * @0: Not allowed
+ * @1: Serialize WMI commands, 1 command at a time
+ * @Default: 2: As advertized by FW
+ *
+ * This ini is used to serialize the WMI commandsif required.
+ *
+ * Related: None
+ *
+ * Usage: External
+ *
+ * <ini>
+ */
+#define WLAN_CFG_WMI_CREDIT_DEFAULT	0
+#define WLAN_CFG_WMI_CREDIT_MIN		1
+#define WLAN_CFG_WMI_CREDIT_MAX		2
+
+#define CFG_DP_HTC_WMI_CREDIT_CNT \
+		CFG_INI_UINT("gWmiCreditCount", \
+		 WLAN_CFG_WMI_CREDIT_MIN, \
+		 WLAN_CFG_WMI_CREDIT_MAX, \
+		 WLAN_CFG_WMI_CREDIT_DEFAULT, \
+		 CFG_VALUE_OR_DEFAULT, "WMI HTC CREDIT COUNT")
+
 #ifdef QCA_LL_LEGACY_TX_FLOW_CONTROL
 #define CFG_HDD_DP_LEGACY_TX_FLOW \
 	CFG(CFG_DP_LL_TX_FLOW_LWM) \
@@ -959,6 +985,7 @@
 	CFG(CFG_DP_FILTER_MULTICAST_REPLAY) \
 	CFG(CFG_DP_RX_WAKELOCK_TIMEOUT) \
 	CFG(CFG_DP_NUM_DP_RX_THREADS) \
+	CFG(CFG_DP_HTC_WMI_CREDIT_CNT) \
 	CFG_DP_ENABLE_FASTPATH_ALL \
 	CFG_HDD_DP_MSM_PLATFORM \
 	CFG_HDD_DP_LEGACY_TX_FLOW \

core/hdd/inc/wlan_hdd_cfg.h

@@ -205,6 +205,7 @@ struct hdd_config {
 	uint32_t provisioned_intf_pool;
 	uint32_t derived_intf_pool;
 	uint8_t enable_rtt_support;
+	uint32_t cfg_wmi_credit_cnt;
 };
 
 #define VAR_OFFSET(_Struct, _Var) (offsetof(_Struct, _Var))

core/hdd/src/wlan_hdd_tx_rx.c

@@ -2986,6 +2986,7 @@ void hdd_dp_cfg_update(struct wlan_objmgr_psoc *psoc,
 	config->rx_wakelock_timeout =
 		cfg_get(psoc, CFG_DP_RX_WAKELOCK_TIMEOUT);
 	config->num_dp_rx_threads = cfg_get(psoc, CFG_DP_NUM_DP_RX_THREADS);
+	config->cfg_wmi_credit_cnt = cfg_get(psoc, CFG_DP_HTC_WMI_CREDIT_CNT);
 	hdd_dp_dp_trace_cfg_update(config, psoc);
 	hdd_dp_nud_tracking_cfg_update(config, psoc);
 }