qed/qede: Add GENEVE tunnel slowpath configuration support

This patch enables GENEVE tunnel on the adapter and
add support for driver hooks to configure UDP ports
for GENEVE tunnel offload to be performed by the adapter.

Signed-off-by: Manish Chopra <manish.chopra@qlogic.com>
Signed-off-by: Yuval Mintz <Yuval.Mintz@qlogic.com>
Signed-off-by: Ariel Elior <Ariel.Elior@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/qlogic/Kconfig

@@ -114,4 +114,14 @@ config QEDE_VXLAN
 	  support for Virtual eXtensible Local Area Network (VXLAN)
 	  in the driver.
 
+config QEDE_GENEVE
+	bool "Generic Network Virtualization Encapsulation (GENEVE) support"
+	depends on QEDE && GENEVE && !(QEDE=y && GENEVE=m)
+	---help---
+	  This allows one to create GENEVE virtual interfaces that provide
+	  Layer 2 Networks over Layer 3 Networks. GENEVE is often used
+	  to tunnel virtual network infrastructure in virtualized environments.
+	  Say Y here if you want to enable hardware offload support for
+	  Generic Network Virtualization Encapsulation (GENEVE) in the driver.
+
 endif # NET_VENDOR_QLOGIC

drivers/net/ethernet/qlogic/qed/qed_main.c

@@ -778,7 +778,10 @@ static int qed_slowpath_start(struct qed_dev *cdev,
 	data = cdev->firmware->data;
 
 	memset(&tunn_info, 0, sizeof(tunn_info));
-	tunn_info.tunn_mode |=  1 << QED_MODE_VXLAN_TUNN;
+	tunn_info.tunn_mode |=  1 << QED_MODE_VXLAN_TUNN |
+				1 << QED_MODE_L2GENEVE_TUNN |
+				1 << QED_MODE_IPGENEVE_TUNN;
+
 	tunn_info.tunn_clss_vxlan = QED_TUNN_CLSS_MAC_VLAN;
 
 	rc = qed_hw_init(cdev, &tunn_info, true,

drivers/net/ethernet/qlogic/qede/qede.h

@@ -170,6 +170,7 @@ struct qede_dev {
 	struct delayed_work		sp_task;
 	unsigned long			sp_flags;
 	u16				vxlan_dst_port;
+	u16				geneve_dst_port;
 };
 
 enum QEDE_STATE {
@@ -292,6 +293,7 @@ struct qede_fastpath {
 
 #define QEDE_SP_RX_MODE			1
 #define QEDE_SP_VXLAN_PORT_CONFIG	2
+#define QEDE_SP_GENEVE_PORT_CONFIG	3
 
 union qede_reload_args {
 	u16 mtu;

drivers/net/ethernet/qlogic/qede/qede_main.c

@@ -27,6 +27,9 @@
 #ifdef CONFIG_QEDE_VXLAN
 #include <net/vxlan.h>
 #endif
+#ifdef CONFIG_QEDE_GENEVE
+#include <net/geneve.h>
+#endif
 #include <linux/ip.h>
 #include <net/ipv6.h>
 #include <net/tcp.h>
@@ -1859,6 +1862,40 @@ static void qede_del_vxlan_port(struct net_device *dev,
 }
 #endif
 
+#ifdef CONFIG_QEDE_GENEVE
+static void qede_add_geneve_port(struct net_device *dev,
+				 sa_family_t sa_family, __be16 port)
+{
+	struct qede_dev *edev = netdev_priv(dev);
+	u16 t_port = ntohs(port);
+
+	if (edev->geneve_dst_port)
+		return;
+
+	edev->geneve_dst_port = t_port;
+
+	DP_VERBOSE(edev, QED_MSG_DEBUG, "Added geneve port=%d", t_port);
+	set_bit(QEDE_SP_GENEVE_PORT_CONFIG, &edev->sp_flags);
+	schedule_delayed_work(&edev->sp_task, 0);
+}
+
+static void qede_del_geneve_port(struct net_device *dev,
+				 sa_family_t sa_family, __be16 port)
+{
+	struct qede_dev *edev = netdev_priv(dev);
+	u16 t_port = ntohs(port);
+
+	if (t_port != edev->geneve_dst_port)
+		return;
+
+	edev->geneve_dst_port = 0;
+
+	DP_VERBOSE(edev, QED_MSG_DEBUG, "Deleted geneve port=%d", t_port);
+	set_bit(QEDE_SP_GENEVE_PORT_CONFIG, &edev->sp_flags);
+	schedule_delayed_work(&edev->sp_task, 0);
+}
+#endif
+
 static const struct net_device_ops qede_netdev_ops = {
 	.ndo_open = qede_open,
 	.ndo_stop = qede_close,
@@ -1874,6 +1911,10 @@ static const struct net_device_ops qede_netdev_ops = {
 	.ndo_add_vxlan_port = qede_add_vxlan_port,
 	.ndo_del_vxlan_port = qede_del_vxlan_port,
 #endif
+#ifdef CONFIG_QEDE_GENEVE
+	.ndo_add_geneve_port = qede_add_geneve_port,
+	.ndo_del_geneve_port = qede_del_geneve_port,
+#endif
 };
 
 /* -------------------------------------------------------------------------
@@ -2064,6 +2105,15 @@ static void qede_sp_task(struct work_struct *work)
 		qed_ops->tunn_config(cdev, &tunn_params);
 	}
 
+	if (test_and_clear_bit(QEDE_SP_GENEVE_PORT_CONFIG, &edev->sp_flags)) {
+		struct qed_tunn_params tunn_params;
+
+		memset(&tunn_params, 0, sizeof(tunn_params));
+		tunn_params.update_geneve_port = 1;
+		tunn_params.geneve_port = edev->geneve_dst_port;
+		qed_ops->tunn_config(cdev, &tunn_params);
+	}
+
 	mutex_unlock(&edev->qede_lock);
 }
 
@@ -3215,6 +3265,9 @@ static int qede_open(struct net_device *ndev)
 
 #ifdef CONFIG_QEDE_VXLAN
 	vxlan_get_rx_port(ndev);
+#endif
+#ifdef CONFIG_QEDE_GENEVE
+	geneve_get_rx_port(ndev);
 #endif
 	return 0;
 }