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 
30 struct vnet_tx_entry {
31 	struct sk_buff		*skb;
32 	unsigned int		ncookies;
33 	struct ldc_trans_cookie	cookies[VNET_MAXCOOKIES];
34 };
35 
36 struct 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  */
44 struct 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 
77 static 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 
85 static 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 
92 struct vnet_mcast_entry {
93 	u8			addr[ETH_ALEN];
94 	u8			sent;
95 	u8			hit;
96 	struct vnet_mcast_entry	*next;
97 };
98 
99 struct 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 */
124 void sunvnet_clean_timer_expire_common(unsigned long port0);
125 int sunvnet_open_common(struct net_device *dev);
126 int sunvnet_close_common(struct net_device *dev);
127 void sunvnet_set_rx_mode_common(struct net_device *dev, struct vnet *vp);
128 int sunvnet_set_mac_addr_common(struct net_device *dev, void *p);
129 void sunvnet_tx_timeout_common(struct net_device *dev);
130 int 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
134 void sunvnet_poll_controller_common(struct net_device *dev, struct vnet *vp);
135 #endif
136 void sunvnet_event_common(void *arg, int event);
137 int sunvnet_send_attr_common(struct vio_driver_state *vio);
138 int sunvnet_handle_attr_common(struct vio_driver_state *vio, void *arg);
139 void sunvnet_handshake_complete_common(struct vio_driver_state *vio);
140 int sunvnet_poll_common(struct napi_struct *napi, int budget);
141 void sunvnet_port_free_tx_bufs_common(struct vnet_port *port);
142 bool sunvnet_port_is_up_common(struct vnet_port *vnet);
143 void sunvnet_port_add_txq_common(struct vnet_port *port);
144 void sunvnet_port_rm_txq_common(struct vnet_port *port);
145 
146 #endif /* _SUNVNETCOMMON_H */
147