qcacld-3.0: Add OSIF support for lro feature in DP component

Add OSIF support for lro feature in DP component

Change-Id: I3e31d5812772aed8e947b39d98008d1ec980e9ab
CRs-Fixed: 3173456

os_if/dp/inc/os_if_dp_lro.h

@@ -29,13 +29,44 @@
 #include <qdf_types.h>
 #include <wlan_objmgr_vdev_obj.h>
 
+#if defined(FEATURE_LRO)
 /**
- * osif_dp_lro_rx() - Handle Rx processing via LRO
+ * osif_dp_lro_rx() - Handle Rx procesing via LRO
  * @vdev: Vdev obj mgr
  * @nbuf: network buffer
  *
  * Return: QDF_STATUS_SUCCESS if processed via LRO or non zero return code
  */
-QDF_STATUS osif_dp_lro_rx(struct wlan_objmgr_vdev *vdev, qdf_nbuf_t nbuf);
+QDF_STATUS osif_dp_lro_rx(qdf_netdev_t dev, qdf_nbuf_t nbuf);
+
+void osif_dp_lro_display_stats(struct wlan_objmgr_vdev *vdev);
+
+/**
+ * osif_dp_lro_set_reset() - vendor command for Disable/Enable LRO
+ * @vdev: Vdev obj mgr
+ * @enable_flag: enable or disable LRO.
+ *
+ * Return: none
+ */
+QDF_STATUS
+osif_dp_lro_set_reset(struct wlan_objmgr_vdev *vdev, uint8_t enable_flag);
+
+#else
+static inline
+QDF_STATUS osif_dp_lro_rx(qdf_netdev_t dev, qdf_nbuf_t nbuf)
+{
+	return QDF_STATUS_E_NOSUPPORT;
+}
+
+static inline void osif_dp_lro_display_stats(struct wlan_objmgr_vdev *vdev)
+{
+}
+
+static inline QDF_STATUS
+osif_dp_lro_set_reset(struct wlan_objmgr_vdev *vdev, uint8_t enable_flag)
+{
+	return 0;
+}
+#endif /* FEATURE_LRO */
 
 #endif /* _OSIF_DP_LRO_H_ */

os_if/dp/src/os_if_dp_lro.c

@@ -18,11 +18,122 @@
  *  DOC: osif_dp_lro.c
  *  This file contains DP component's LRO osif API implementation
  */
-#include <wlan_objmgr_vdev_obj.h>
 #include "os_if_dp_lro.h"
+#include <wlan_objmgr_vdev_obj.h>
+#include <linux/inet_lro.h>
+#include <linux/list.h>
+#include <linux/random.h>
+#include <net/tcp.h>
+
+#define LRO_VALID_FIELDS \
+	(LRO_DESC | LRO_ELIGIBILITY_CHECKED | LRO_TCP_ACK_NUM | \
+	 LRO_TCP_DATA_CSUM | LRO_TCP_SEQ_NUM | LRO_TCP_WIN)
 
-QDF_STATUS osif_dp_lro_rx(struct wlan_objmgr_vdev *vdev, qdf_nbuf_t nbuf)
+#if defined(QCA_WIFI_QCA6290) || defined(QCA_WIFI_QCA6390) || \
+    defined(QCA_WIFI_QCA6490) || defined(QCA_WIFI_QCA6750) || \
+    defined(QCA_WIFI_KIWI)
+#ifdef WLAN_FEATURE_LRO_CTX_IN_CB
+static qdf_lro_ctx_t osif_dp_get_lro_ctx(struct sk_buff *skb)
 {
-	return QDF_STATUS_SUCCESS;
+	return (qdf_lro_ctx_t)QDF_NBUF_CB_RX_LRO_CTX(skb);
 }
+#else
+static qdf_lro_ctx_t osif_dp_get_lro_ctx(struct sk_buff *skb)
+{
+	struct hif_opaque_softc *hif_hdl =
+		(struct hif_opaque_softc *)cds_get_context(QDF_MODULE_ID_HIF);
+	if (!hif_hdl)
+		return NULL;
+
+	return hif_get_lro_info(QDF_NBUF_CB_RX_CTX_ID(skb), hif_hdl);
+}
+#endif
+
+/**
+ * osif_dp_lro_rx() - LRO receive function
+ * @vdev: Vdev obj mgr
+ * @nbuf: network buffer
+ *
+ * Delivers LRO eligible frames to the LRO manager
+ *
+ * Return: QDF_STATUS_SUCCESS - frame delivered to LRO manager
+ * QDF_STATUS_E_FAILURE - frame not delivered
+ */
+QDF_STATUS osif_dp_lro_rx(qdf_netdev_t dev, qdf_nbuf_t nbuf)
+{
+	qdf_lro_ctx_t ctx;
+	QDF_STATUS status = QDF_STATUS_E_FAILURE;
+	struct qdf_lro_info info;
+	struct net_lro_desc *lro_desc = NULL;
+	struct sk_buff * skb = (struct sk_buff *)nbuf;
+
+	if ((dev->features & NETIF_F_LRO) != NETIF_F_LRO)
+		return QDF_STATUS_E_NOSUPPORT;
+
+	ctx = osif_dp_get_lro_ctx(skb);
+	if (!ctx) {
+		osif_err("LRO mgr is NULL");
+		return status;
+	}
+
+	info.iph = skb->data;
+	info.tcph = skb->data + QDF_NBUF_CB_RX_TCP_OFFSET(skb);
+	ctx->lro_mgr->dev = dev;
+	if (qdf_lro_get_info(ctx, skb, &info, (void **)&lro_desc)) {
+		struct net_lro_info dp_lro_info;
+
+		dp_lro_info.valid_fields = LRO_VALID_FIELDS;
+
+		dp_lro_info.lro_desc = lro_desc;
+		dp_lro_info.lro_eligible = 1;
+		dp_lro_info.tcp_ack_num = QDF_NBUF_CB_RX_TCP_ACK_NUM(skb);
+		dp_lro_info.tcp_data_csum =
+			 csum_unfold(htons(QDF_NBUF_CB_RX_TCP_CHKSUM(skb)));
+		dp_lro_info.tcp_seq_num = QDF_NBUF_CB_RX_TCP_SEQ_NUM(skb);
+		dp_lro_info.tcp_win = QDF_NBUF_CB_RX_TCP_WIN(skb);
 
+		lro_receive_skb_ext(ctx->lro_mgr, skb, NULL,
+				    &dp_lro_info);
+
+		if (!dp_lro_info.lro_desc->active)
+			qdf_lro_desc_free(ctx, lro_desc);
+
+		status = QDF_STATUS_SUCCESS;
+	} else {
+		qdf_lro_flush_pkt(ctx, &info);
+	}
+	return status;
+}
+
+/**
+ * dp_lro_display_stats() - display LRO statistics
+ * @vdev: vdev objmgr context
+ *
+ * Return: none
+ */
+void osif_dp_lro_display_stats(struct wlan_vdev_objmgr *vdev)
+{
+	osif_debug("LRO stats is broken, will fix it");
+}
+
+QDF_STATUS
+osif_dp_lro_set_reset(struct wlan_vdev_objmgr *vdev, uint8_t enable_flag)
+{
+	struct vdev_osif_priv *osif_priv;
+	struct net_device *dev;
+	QDF_STATUS status;
+
+	osif_priv  = wlan_vdev_get_ospriv(vdev);
+	dev = osif_priv->wdev->netdev;
+
+	status = ucfg_dp_lro_set_reset(vdev, enable_flag);
+	if (QDF_IS_STATUS_ERROR(status))
+		return 0;
+
+	if (enable_flag)
+		dev->features |= NETIF_F_LRO;
+	else
+		dev->features &= ~NETIF_F_LRO;
+
+	return 0;
+}