1#ifndef _SUNVNETCOMMON_H
  2#define _SUNVNETCOMMON_H
  3
  4#include <linux/interrupt.h>
  5
  6/* length of time (or less) we expect pending descriptors to be marked
  7 * as VIO_DESC_DONE and skbs ready to be freed
  8 */
  9#define	VNET_CLEAN_TIMEOUT		((HZ / 100) + 1)
 10
 11#define VNET_MAXPACKET			(65535ULL + ETH_HLEN + VLAN_HLEN)
 12#define VNET_TX_RING_SIZE		512
 13#define VNET_TX_WAKEUP_THRESH(dr)	((dr)->pending / 4)
 14
 15#define	VNET_MINTSO	 2048	/* VIO protocol's minimum TSO len */
 16#define	VNET_MAXTSO	65535	/* VIO protocol's maximum TSO len */
 17
 18#define VNET_MAX_MTU	65535
 19
 20/* VNET packets are sent in buffers with the first 6 bytes skipped
 21 * so that after the ethernet header the IPv4/IPv6 headers are aligned
 22 * properly.
 23 */
 24#define VNET_PACKET_SKIP		6
 25
 26#define	VNET_MAXCOOKIES			(VNET_MAXPACKET / PAGE_SIZE + 1)
 27
 28#define	VNET_MAX_TXQS		16
 29
 30struct vnet_tx_entry {
 31	struct sk_buff		*skb;
 32	unsigned int		ncookies;
 33	struct ldc_trans_cookie	cookies[VNET_MAXCOOKIES];
 34};
 35
 36struct vnet;
 37
 38/* Structure to describe a vnet-port or vsw-port in the MD.
 39 * If the vsw bit is set, this structure represents a vswitch
 40 * port, and the net_device can be found from ->dev. If the
 41 * vsw bit is not set, the net_device is available from ->vp->dev.
 42 * See the VNET_PORT_TO_NET_DEVICE macro below.
 43 */
 44struct vnet_port {
 45	struct vio_driver_state	vio;
 46
 47	struct hlist_node	hash;
 48	u8			raddr[ETH_ALEN];
 49	unsigned		switch_port:1;
 50	unsigned		tso:1;
 51	unsigned		vsw:1;
 52	unsigned		__pad:13;
 53
 54	struct vnet		*vp;
 55	struct net_device	*dev;
 56
 57	struct vnet_tx_entry	tx_bufs[VNET_TX_RING_SIZE];
 58
 59	struct list_head	list;
 60
 61	u32			stop_rx_idx;
 62	bool			stop_rx;
 63	bool			start_cons;
 64
 65	struct timer_list	clean_timer;
 66
 67	u64			rmtu;
 68	u16			tsolen;
 69
 70	struct napi_struct	napi;
 71	u32			napi_stop_idx;
 72	bool			napi_resume;
 73	int			rx_event;
 74	u16			q_index;
 75};
 76
 77static inline struct vnet_port *to_vnet_port(struct vio_driver_state *vio)
 78{
 79	return container_of(vio, struct vnet_port, vio);
 80}
 81
 82#define VNET_PORT_HASH_SIZE	16
 83#define VNET_PORT_HASH_MASK	(VNET_PORT_HASH_SIZE - 1)
 84
 85static inline unsigned int vnet_hashfn(u8 *mac)
 86{
 87	unsigned int val = mac[4] ^ mac[5];
 88
 89	return val & (VNET_PORT_HASH_MASK);
 90}
 91
 92struct vnet_mcast_entry {
 93	u8			addr[ETH_ALEN];
 94	u8			sent;
 95	u8			hit;
 96	struct vnet_mcast_entry	*next;
 97};
 98
 99struct vnet {
100	/* Protects port_list and port_hash.  */
101	spinlock_t		lock;
102
103	struct net_device	*dev;
104
105	u32			msg_enable;
106
107	struct list_head	port_list;
108
109	struct hlist_head	port_hash[VNET_PORT_HASH_SIZE];
110
111	struct vnet_mcast_entry	*mcast_list;
112
113	struct list_head	list;
114	u64			local_mac;
115
116	int			nports;
117};
118
119/* Def used by common code to get the net_device from the proper location */
120#define VNET_PORT_TO_NET_DEVICE(__port) \
121	((__port)->vsw ? (__port)->dev : (__port)->vp->dev)
122
123/* Common funcs */
124void sunvnet_clean_timer_expire_common(unsigned long port0);
125int sunvnet_open_common(struct net_device *dev);
126int sunvnet_close_common(struct net_device *dev);
127void sunvnet_set_rx_mode_common(struct net_device *dev, struct vnet *vp);
128int sunvnet_set_mac_addr_common(struct net_device *dev, void *p);
129void sunvnet_tx_timeout_common(struct net_device *dev);
130int sunvnet_start_xmit_common(struct sk_buff *skb, struct net_device *dev,
131			   struct vnet_port *(*vnet_tx_port)
132			   (struct sk_buff *, struct net_device *));
133#ifdef CONFIG_NET_POLL_CONTROLLER
134void sunvnet_poll_controller_common(struct net_device *dev, struct vnet *vp);
135#endif
136void sunvnet_event_common(void *arg, int event);
137int sunvnet_send_attr_common(struct vio_driver_state *vio);
138int sunvnet_handle_attr_common(struct vio_driver_state *vio, void *arg);
139void sunvnet_handshake_complete_common(struct vio_driver_state *vio);
140int sunvnet_poll_common(struct napi_struct *napi, int budget);
141void sunvnet_port_free_tx_bufs_common(struct vnet_port *port);
142bool sunvnet_port_is_up_common(struct vnet_port *vnet);
143void sunvnet_port_add_txq_common(struct vnet_port *port);
144void sunvnet_port_rm_txq_common(struct vnet_port *port);
145
146#endif /* _SUNVNETCOMMON_H */