1#ifndef _SUNVNET_H
2#define _SUNVNET_H
3
4#include <linux/interrupt.h>
5
6#define DESC_NCOOKIES(entry_size)	\
7	((entry_size) - sizeof(struct vio_net_desc))
8
9/* length of time before we decide the hardware is borked,
10 * and dev->tx_timeout() should be called to fix the problem
11 */
12#define VNET_TX_TIMEOUT			(5 * HZ)
13
14/* length of time (or less) we expect pending descriptors to be marked
15 * as VIO_DESC_DONE and skbs ready to be freed
16 */
17#define	VNET_CLEAN_TIMEOUT		((HZ/100)+1)
18
19#define VNET_MAXPACKET			(65535ULL + ETH_HLEN + VLAN_HLEN)
20#define VNET_TX_RING_SIZE		512
21#define VNET_TX_WAKEUP_THRESH(dr)	((dr)->pending / 4)
22
23#define	VNET_MINTSO	 2048	/* VIO protocol's minimum TSO len */
24#define	VNET_MAXTSO	65535	/* VIO protocol's maximum TSO len */
25
26/* VNET packets are sent in buffers with the first 6 bytes skipped
27 * so that after the ethernet header the IPv4/IPv6 headers are aligned
28 * properly.
29 */
30#define VNET_PACKET_SKIP		6
31
32#define VNET_MAXCOOKIES			(VNET_MAXPACKET/PAGE_SIZE + 1)
33
34struct vnet_tx_entry {
35	struct sk_buff		*skb;
36	unsigned int		ncookies;
37	struct ldc_trans_cookie	cookies[VNET_MAXCOOKIES];
38};
39
40struct vnet;
41struct vnet_port {
42	struct vio_driver_state	vio;
43
44	struct hlist_node	hash;
45	u8			raddr[ETH_ALEN];
46	unsigned		switch_port:1;
47	unsigned		tso:1;
48	unsigned		__pad:14;
49
50	struct vnet		*vp;
51
52	struct vnet_tx_entry	tx_bufs[VNET_TX_RING_SIZE];
53
54	struct list_head	list;
55
56	u32			stop_rx_idx;
57	bool			stop_rx;
58	bool			start_cons;
59
60	struct timer_list	clean_timer;
61
62	u64			rmtu;
63	u16			tsolen;
64
65	struct napi_struct	napi;
66	u32			napi_stop_idx;
67	bool			napi_resume;
68	int			rx_event;
69	u16			q_index;
70};
71
72static inline struct vnet_port *to_vnet_port(struct vio_driver_state *vio)
73{
74	return container_of(vio, struct vnet_port, vio);
75}
76
77#define VNET_PORT_HASH_SIZE	16
78#define VNET_PORT_HASH_MASK	(VNET_PORT_HASH_SIZE - 1)
79
80static inline unsigned int vnet_hashfn(u8 *mac)
81{
82	unsigned int val = mac[4] ^ mac[5];
83
84	return val & (VNET_PORT_HASH_MASK);
85}
86
87struct vnet_mcast_entry {
88	u8			addr[ETH_ALEN];
89	u8			sent;
90	u8			hit;
91	struct vnet_mcast_entry	*next;
92};
93
94struct vnet {
95	/* Protects port_list and port_hash.  */
96	spinlock_t		lock;
97
98	struct net_device	*dev;
99
100	u32			msg_enable;
101
102	struct list_head	port_list;
103
104	struct hlist_head	port_hash[VNET_PORT_HASH_SIZE];
105
106	struct vnet_mcast_entry	*mcast_list;
107
108	struct list_head	list;
109	u64			local_mac;
110
111	int			nports;
112};
113
114#endif /* _SUNVNET_H */
115