[SPARC64]: Add Sun LDOM virtual network driver.

Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/Kconfig

@@ -604,6 +604,12 @@ config CASSINI
 	  Support for the Sun Cassini chip, aka Sun GigaSwift Ethernet. See also
 	  <http://www.sun.com/products-n-solutions/hardware/docs/pdf/817-4341-10.pdf>
 
+config SUNVNET
+	tristate "Sun Virtual Network support"
+	depends on SUN_LDOMS
+	help
+	  Support for virtual network devices under Sun Logical Domains.
+
 config NET_VENDOR_3COM
 	bool "3COM cards"
 	depends on ISA || EISA || MCA || PCI

drivers/net/Makefile

@@ -34,6 +34,7 @@ obj-$(CONFIG_SUNBMAC) += sunbmac.o
 obj-$(CONFIG_MYRI_SBUS) += myri_sbus.o
 obj-$(CONFIG_SUNGEM) += sungem.o sungem_phy.o
 obj-$(CONFIG_CASSINI) += cassini.o
+obj-$(CONFIG_SUNVNET) += sunvnet.o
 
 obj-$(CONFIG_MACE) += mace.o
 obj-$(CONFIG_BMAC) += bmac.o

drivers/net/sunvnet.h

+#ifndef _SUNVNET_H
+#define _SUNVNET_H
+
+#define DESC_NCOOKIES(entry_size)	\
+	((entry_size) - sizeof(struct vio_net_desc))
+
+/* length of time before we decide the hardware is borked,
+ * and dev->tx_timeout() should be called to fix the problem
+ */
+#define VNET_TX_TIMEOUT			(5 * HZ)
+
+#define VNET_TX_RING_SIZE		512
+#define VNET_TX_WAKEUP_THRESH(dr)	((dr)->pending / 4)
+
+/* VNET packets are sent in buffers with the first 6 bytes skipped
+ * so that after the ethernet header the IPv4/IPv6 headers are aligned
+ * properly.
+ */
+#define VNET_PACKET_SKIP		6
+
+struct vnet_tx_entry {
+	void			*buf;
+	unsigned int		ncookies;
+	struct ldc_trans_cookie	cookies[2];
+};
+
+struct vnet;
+struct vnet_port {
+	struct vio_driver_state	vio;
+
+	struct hlist_node	hash;
+	u8			raddr[ETH_ALEN];
+
+	struct vnet		*vp;
+
+	struct vnet_tx_entry	tx_bufs[VNET_TX_RING_SIZE];
+
+	struct list_head	list;
+};
+
+static inline struct vnet_port *to_vnet_port(struct vio_driver_state *vio)
+{
+	return container_of(vio, struct vnet_port, vio);
+}
+
+#define VNET_PORT_HASH_SIZE	16
+#define VNET_PORT_HASH_MASK	(VNET_PORT_HASH_SIZE - 1)
+
+static inline unsigned int vnet_hashfn(u8 *mac)
+{
+	unsigned int val = mac[4] ^ mac[5];
+
+	return val & (VNET_PORT_HASH_MASK);
+}
+
+struct vnet {
+	/* Protects port_list and port_hash.  */
+	spinlock_t		lock;
+
+	struct net_device	*dev;
+
+	u32			msg_enable;
+	struct vio_dev		*vdev;
+
+	struct list_head	port_list;
+
+	struct hlist_head	port_hash[VNET_PORT_HASH_SIZE];
+};
+
+#endif /* _SUNVNET_H */