qcacld-3.0: Add NAN TX checksum offload INI entry

Currently there is a single INI item tcp_udp_checksumoffload to enable
or disable this feature for all the adapters. In some cases, we want to
be able to enable this feature selectively for NAN mode.

Add nan_tcp_udp_checksumoffload ini item to enable or disable checksum
offload feature specifically for NAN mode. If
nan_tcp_udp_checksumoffload is 'true' and tcp_udp_checksumoffload is
false, hardware checksum offload will be enabled only for the NAN
adapter and not for other adapters.

CRs-Fixed: 2698342
Change-Id: I56319095e6229d77ddb5c790d0af9c6ba0267611

core/cds/src/cds_api.c

@@ -403,6 +403,8 @@ static void cds_cdp_cfg_attach(struct wlan_objmgr_psoc *psoc)
 	cdp_cfg.enable_rxthread = hdd_ctx->enable_rxthread;
 	cdp_cfg.ip_tcp_udp_checksum_offload =
 		cfg_get(psoc, CFG_DP_TCP_UDP_CKSUM_OFFLOAD);
+	cdp_cfg.nan_ip_tcp_udp_checksum_offload =
+		cfg_get(psoc, CFG_DP_NAN_TCP_UDP_CKSUM_OFFLOAD);
 	cdp_cfg.ce_classify_enabled =
 		cfg_get(psoc, CFG_DP_CE_CLASSIFY_ENABLE);
 	cdp_cfg.tso_enable = cfg_get(psoc, CFG_DP_TSO);

core/hdd/inc/wlan_hdd_main.h

@@ -3247,6 +3247,16 @@ static inline void hdd_set_sg_flags(struct hdd_context *hdd_ctx,
 				struct net_device *wlan_dev){}
 #endif
 
+/**
+ * hdd_set_netdev_flags() - set netdev flags for adapter as per ini config
+ * @adapter: hdd adapter context
+ *
+ * This function sets netdev feature flags for the adapter.
+ *
+ * Return: none
+ */
+void hdd_set_netdev_flags(struct hdd_adapter *adapter);
+
 #ifdef FEATURE_TSO
 /**
  * hdd_set_tso_flags() - enable TSO flags in the network device

core/hdd/src/wlan_hdd_main.c

@@ -6871,6 +6871,62 @@ QDF_STATUS hdd_stop_all_adapters(struct hdd_context *hdd_ctx)
 	return QDF_STATUS_SUCCESS;
 }
 
+void hdd_set_netdev_flags(struct hdd_adapter *adapter)
+{
+	bool enable_csum = false;
+	enum QDF_OPMODE device_mode;
+	struct hdd_context *hdd_ctx;
+	ol_txrx_soc_handle soc;
+	uint64_t temp;
+
+	if (!adapter || !adapter->dev) {
+		hdd_err("invalid input!");
+		return;
+	}
+
+	hdd_ctx = adapter->hdd_ctx;
+	device_mode = adapter->device_mode;
+	soc = cds_get_context(QDF_MODULE_ID_SOC);
+
+	/* Determine device_mode specific configuration */
+	switch (device_mode) {
+	case QDF_NDI_MODE:
+	case QDF_NAN_DISC_MODE:
+		if (cdp_cfg_get(soc,
+				cfg_dp_enable_nan_ip_tcp_udp_checksum_offload))
+			enable_csum = true;
+		break;
+	default:
+		if (cdp_cfg_get(soc,
+				cfg_dp_enable_ip_tcp_udp_checksum_offload))
+			enable_csum = true;
+	}
+
+	/* Set netdev flags */
+
+	/*
+	 * In case of USB tethering, LRO is disabled. If SSR happened
+	 * during that time, then as part of SSR init, do not enable
+	 * the LRO again. Keep the LRO state same as before SSR.
+	 */
+	if (cdp_cfg_get(soc, cfg_dp_lro_enable) &&
+	    !(qdf_atomic_read(&hdd_ctx->vendor_disable_lro_flag)))
+		adapter->dev->features |= NETIF_F_LRO;
+
+	if (enable_csum)
+		adapter->dev->features |=
+			(NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM);
+
+	if (cdp_cfg_get(soc, cfg_dp_tso_enable) && enable_csum)
+		adapter->dev->features |=
+			 (NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_SG);
+
+	adapter->dev->features |= NETIF_F_RXCSUM;
+	temp = (uint64_t)adapter->dev->features;
+
+	hdd_debug("adapter mode %u dev feature 0x%llx", device_mode, temp);
+}
+
 static void hdd_reset_scan_operation(struct hdd_context *hdd_ctx,
 				     struct hdd_adapter *adapter)
 {
@@ -16332,6 +16388,9 @@ static int hdd_update_dp_config(struct hdd_context *hdd_ctx)
 	params.flow_steering_enable =
 		cfg_get(hdd_ctx->psoc, CFG_DP_FLOW_STEERING_ENABLED);
 	params.napi_enable = hdd_ctx->napi_enable;
+	params.nan_tcp_udp_checksumoffload =
+		cfg_get(hdd_ctx->psoc,
+			CFG_DP_NAN_TCP_UDP_CKSUM_OFFLOAD);
 	params.tcp_udp_checksumoffload =
 			cfg_get(hdd_ctx->psoc,
 				CFG_DP_TCP_UDP_CKSUM_OFFLOAD);

core/hdd/src/wlan_hdd_nan_datapath.c

@@ -450,7 +450,6 @@ int hdd_init_nan_data_mode(struct hdd_adapter *adapter)
 {
 	struct net_device *wlan_dev = adapter->dev;
 	struct hdd_context *hdd_ctx = WLAN_HDD_GET_CTX(adapter);
-	void *soc;
 	QDF_STATUS status;
 	int32_t ret_val;
 	mac_handle_t mac_handle;
@@ -507,22 +506,7 @@ int hdd_init_nan_data_mode(struct hdd_adapter *adapter)
 	if (0 != ret_val)
 		hdd_err("WMI_PDEV_PARAM_BURST_ENABLE set failed %d", ret_val);
 
-	soc = cds_get_context(QDF_MODULE_ID_SOC);
-	/*
-	 * In case of USB tethering, LRO is disabled. If SSR happened
-	 * during that time, then as part of SSR init, do not enable
-	 * the LRO again. Keep the LRO state same as before SSR.
-	 */
-	if (cdp_cfg_get(soc, cfg_dp_lro_enable) &&
-	    !(qdf_atomic_read(&hdd_ctx->vendor_disable_lro_flag)))
-		adapter->dev->features |= NETIF_F_LRO;
-
-	if (cdp_cfg_get(soc, cfg_dp_enable_ip_tcp_udp_checksum_offload))
-		adapter->dev->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
-
-	adapter->dev->features |= NETIF_F_RXCSUM;
-
-	hdd_set_tso_flags(hdd_ctx, adapter->dev);
+	hdd_set_netdev_flags(adapter);
 
 	update_ndi_state(adapter, NAN_DATA_NDI_CREATING_STATE);
 	return ret_val;