qcacld-3.0: Implement STA+SAP offload

When Mobile Hotspot works as a wifi sharing mode, need to forward
packets between STA and SAP interfaces using NAT operation.
To improve power consumption, offload data packet forward and NAT
operation in IPA, without waking up the host APPS.
Data offload in STA interface is enabled only in STA+SAP concurrency
mode.

Change-Id: I1d6cef20c99d13ad328fabd4ec3ef30ac163f787
CRs-fixed: 1058990

core/hdd/src/wlan_hdd_ipa.c

@@ -1592,20 +1592,15 @@ static void hdd_ipa_uc_offload_enable_disable(hdd_adapter_t *adapter,
 {
 	struct sir_ipa_offload_enable_disable ipa_offload_enable_disable;
 
-	/* Lower layer may send multiple START_BSS_EVENT in DFS mode or during
-	 * channel change indication. Since these indications are sent by lower
-	 * layer as SAP updates and IPA doesn't have to do anything for these
-	 * updates so ignoring!
-	 */
-	if (QDF_SAP_MODE == adapter->device_mode && adapter->ipa_context)
+	if (!adapter)
 		return;
 
 	/* Lower layer may send multiple START_BSS_EVENT in DFS mode or during
 	 * channel change indication. Since these indications are sent by lower
 	 * layer as SAP updates and IPA doesn't have to do anything for these
 	 * updates so ignoring!
-	*/
-	if (adapter->ipa_context)
+	 */
+	if (QDF_SAP_MODE == adapter->device_mode && adapter->ipa_context)
 		return;
 
 	qdf_mem_zero(&ipa_offload_enable_disable,
@@ -3696,43 +3691,28 @@ static int __hdd_ipa_wlan_evt(hdd_adapter_t *adapter, uint8_t sta_id,
 		if (hdd_ipa->sta_connected)
 			hdd_ipa_cleanup_iface(adapter->ipa_context);
 
-		if ((hdd_ipa_uc_sta_is_enabled(hdd_ipa->hdd_ctx)) &&
-			(!hdd_ipa->sta_connected))
+		if (hdd_ipa_uc_sta_is_enabled(hdd_ipa->hdd_ctx) &&
+		    (hdd_ipa->sap_num_connected_sta > 0) &&
+		    !hdd_ipa->sta_connected)
 			hdd_ipa_uc_offload_enable_disable(adapter,
 				SIR_STA_RX_DATA_OFFLOAD, 1);
 
 		qdf_mutex_acquire(&hdd_ipa->event_lock);
 
-		if (!hdd_ipa_uc_is_enabled(hdd_ipa->hdd_ctx)) {
-			HDD_IPA_LOG(QDF_TRACE_LEVEL_INFO,
-				"%s: Evt: %d, IPA UC OFFLOAD NOT ENABLED",
-				msg_ex->name, meta.msg_type);
-		} else if ((!hdd_ipa->sap_num_connected_sta) &&
-			(!hdd_ipa->sta_connected)) {
-			/* Enable IPA UC TX PIPE when STA connected */
-			ret = hdd_ipa_uc_handle_first_con(hdd_ipa);
-			if (ret) {
-				qdf_mutex_release(&hdd_ipa->event_lock);
-				HDD_IPA_LOG(QDF_TRACE_LEVEL_ERROR,
-					"handle 1st con ret %d", ret);
-				hdd_ipa_uc_offload_enable_disable(adapter,
-					SIR_STA_RX_DATA_OFFLOAD, 0);
-				goto end;
-			}
-		}
 		ret = hdd_ipa_setup_iface(hdd_ipa, adapter, sta_id);
 		if (ret) {
 			qdf_mutex_release(&hdd_ipa->event_lock);
-			hdd_ipa_uc_offload_enable_disable(adapter,
-				SIR_STA_RX_DATA_OFFLOAD, 0);
+			if (hdd_ipa_uc_sta_is_enabled(hdd_ipa->hdd_ctx) &&
+			    (hdd_ipa->sap_num_connected_sta > 0) &&
+			    !hdd_ipa->sta_connected)
+				hdd_ipa_uc_offload_enable_disable(adapter,
+					SIR_STA_RX_DATA_OFFLOAD, 0);
 			goto end;
+		}
 
-#ifdef IPA_UC_OFFLOAD
 		vdev_to_iface[adapter->sessionId] =
 			((struct hdd_ipa_iface_context *)
-				(adapter->ipa_context))->iface_id;
-#endif /* IPA_UC_OFFLOAD */
-		}
+			(adapter->ipa_context))->iface_id;
 
 		qdf_mutex_release(&hdd_ipa->event_lock);
 
@@ -3749,10 +3729,10 @@ static int __hdd_ipa_wlan_evt(hdd_adapter_t *adapter, uint8_t sta_id,
 		if (adapter->ipa_context)
 			return 0;
 
-		if (hdd_ipa_uc_is_enabled(hdd_ipa->hdd_ctx)) {
+		if (hdd_ipa_uc_is_enabled(hdd_ipa->hdd_ctx))
 			hdd_ipa_uc_offload_enable_disable(adapter,
 				SIR_AP_RX_DATA_OFFLOAD, 1);
-		}
+
 		qdf_mutex_acquire(&hdd_ipa->event_lock);
 		ret = hdd_ipa_setup_iface(hdd_ipa, adapter, sta_id);
 		if (ret) {
@@ -3761,13 +3741,12 @@ static int __hdd_ipa_wlan_evt(hdd_adapter_t *adapter, uint8_t sta_id,
 				msg_ex->name, meta.msg_type);
 			qdf_mutex_release(&hdd_ipa->event_lock);
 			goto end;
+		}
 
-#ifdef IPA_UC_OFFLOAD
 		vdev_to_iface[adapter->sessionId] =
 			((struct hdd_ipa_iface_context *)
-				(adapter->ipa_context))->iface_id;
-#endif /* IPA_UC_OFFLOAD */
-		}
+			(adapter->ipa_context))->iface_id;
+
 		qdf_mutex_release(&hdd_ipa->event_lock);
 		break;
 
@@ -3782,19 +3761,19 @@ static int __hdd_ipa_wlan_evt(hdd_adapter_t *adapter, uint8_t sta_id,
 			qdf_mutex_release(&hdd_ipa->event_lock);
 			return -EINVAL;
 		}
+
 		hdd_ipa->sta_connected = 0;
+
 		if (!hdd_ipa_uc_is_enabled(hdd_ipa->hdd_ctx)) {
 			HDD_IPA_LOG(QDF_TRACE_LEVEL_INFO,
 				"%s: IPA UC OFFLOAD NOT ENABLED",
 				msg_ex->name);
 		} else {
 			/* Disable IPA UC TX PIPE when STA disconnected */
-			if ((!hdd_ipa->sap_num_connected_sta) ||
-				((!hdd_ipa->num_iface) &&
-					(HDD_IPA_UC_NUM_WDI_PIPE ==
-					hdd_ipa->activated_fw_pipe))) {
+			if (!hdd_ipa->num_iface &&
+			    (HDD_IPA_UC_NUM_WDI_PIPE ==
+			    hdd_ipa->activated_fw_pipe))
 				hdd_ipa_uc_handle_last_discon(hdd_ipa);
-			}
 		}
 
 		if (hdd_ipa_uc_sta_is_enabled(hdd_ipa->hdd_ctx)) {
@@ -3839,6 +3818,7 @@ static int __hdd_ipa_wlan_evt(hdd_adapter_t *adapter, uint8_t sta_id,
 				SIR_AP_RX_DATA_OFFLOAD, 0);
 			vdev_to_iface[adapter->sessionId] = HDD_IPA_MAX_IFACE;
 		}
+
 		qdf_mutex_release(&hdd_ipa->event_lock);
 		break;
 
@@ -3864,15 +3844,30 @@ static int __hdd_ipa_wlan_evt(hdd_adapter_t *adapter, uint8_t sta_id,
 		}
 
 		/* Enable IPA UC Data PIPEs when first STA connected */
-		if ((0 == hdd_ipa->sap_num_connected_sta) &&
-		   (!hdd_ipa_uc_sta_is_enabled(hdd_ipa->hdd_ctx) ||
-		   !hdd_ipa->sta_connected)) {
+		if (0 == hdd_ipa->sap_num_connected_sta) {
+			if (hdd_ipa_uc_sta_is_enabled(hdd_ipa->hdd_ctx) &&
+			    hdd_ipa->sta_connected)
+				hdd_ipa_uc_offload_enable_disable(
+					hdd_get_adapter(hdd_ipa->hdd_ctx,
+							QDF_STA_MODE),
+					SIR_STA_RX_DATA_OFFLOAD, 1);
+
 			ret = hdd_ipa_uc_handle_first_con(hdd_ipa);
 			if (ret) {
 				qdf_mutex_release(&hdd_ipa->event_lock);
 				HDD_IPA_LOG(QDF_TRACE_LEVEL_ERROR,
 					    "%s: handle 1st con ret %d",
 					    adapter->dev->name, ret);
+
+				if (hdd_ipa_uc_sta_is_enabled(
+					hdd_ipa->hdd_ctx) &&
+				    hdd_ipa->sta_connected)
+					hdd_ipa_uc_offload_enable_disable(
+						hdd_get_adapter(
+							hdd_ipa->hdd_ctx,
+							QDF_STA_MODE),
+						SIR_STA_RX_DATA_OFFLOAD, 0);
+
 				return ret;
 			}
 		}
@@ -3935,12 +3930,18 @@ static int __hdd_ipa_wlan_evt(hdd_adapter_t *adapter, uint8_t sta_id,
 		hdd_ipa->sap_num_connected_sta--;
 		/* Disable IPA UC TX PIPE when last STA disconnected */
 		if (!hdd_ipa->sap_num_connected_sta
-			&& (!hdd_ipa_uc_sta_is_enabled(hdd_ipa->hdd_ctx) ||
-			!hdd_ipa->sta_connected)
 			&& (false == hdd_ipa->resource_unloading)
 			&& (HDD_IPA_UC_NUM_WDI_PIPE ==
 				hdd_ipa->activated_fw_pipe))
 			hdd_ipa_uc_handle_last_discon(hdd_ipa);
+
+		if (hdd_ipa_uc_sta_is_enabled(hdd_ipa->hdd_ctx) &&
+		    hdd_ipa->sta_connected)
+			hdd_ipa_uc_offload_enable_disable(
+				hdd_get_adapter(hdd_ipa->hdd_ctx,
+						QDF_STA_MODE),
+						SIR_STA_RX_DATA_OFFLOAD, 0);
+
 		qdf_mutex_release(&hdd_ipa->event_lock);
 		break;