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 struct vnet_port_stats {
39 	/* keep them all the same size */
40 	u32 rx_bytes;
41 	u32 tx_bytes;
42 	u32 rx_packets;
43 	u32 tx_packets;
44 	u32 event_up;
45 	u32 event_reset;
46 	u32 q_placeholder;
47 };
48 
49 #define NUM_VNET_PORT_STATS  (sizeof(struct vnet_port_stats) / sizeof(u32))
50 
51 /* Structure to describe a vnet-port or vsw-port in the MD.
52  * If the vsw bit is set, this structure represents a vswitch
53  * port, and the net_device can be found from ->dev. If the
54  * vsw bit is not set, the net_device is available from ->vp->dev.
55  * See the VNET_PORT_TO_NET_DEVICE macro below.
56  */
57 struct vnet_port {
58 	struct vio_driver_state	vio;
59 
60 	struct vnet_port_stats stats;
61 
62 	struct hlist_node	hash;
63 	u8			raddr[ETH_ALEN];
64 	unsigned		switch_port:1;
65 	unsigned		tso:1;
66 	unsigned		vsw:1;
67 	unsigned		__pad:13;
68 
69 	struct vnet		*vp;
70 	struct net_device	*dev;
71 
72 	struct vnet_tx_entry	tx_bufs[VNET_TX_RING_SIZE];
73 
74 	struct list_head	list;
75 
76 	u32			stop_rx_idx;
77 	bool			stop_rx;
78 	bool			start_cons;
79 
80 	struct timer_list	clean_timer;
81 
82 	u64			rmtu;
83 	u16			tsolen;
84 
85 	struct napi_struct	napi;
86 	u32			napi_stop_idx;
87 	bool			napi_resume;
88 	int			rx_event;
89 	u16			q_index;
90 };
91 
92 static inline struct vnet_port *to_vnet_port(struct vio_driver_state *vio)
93 {
94 	return container_of(vio, struct vnet_port, vio);
95 }
96 
97 #define VNET_PORT_HASH_SIZE	16
98 #define VNET_PORT_HASH_MASK	(VNET_PORT_HASH_SIZE - 1)
99 
100 static inline unsigned int vnet_hashfn(u8 *mac)
101 {
102 	unsigned int val = mac[4] ^ mac[5];
103 
104 	return val & (VNET_PORT_HASH_MASK);
105 }
106 
107 struct vnet_mcast_entry {
108 	u8			addr[ETH_ALEN];
109 	u8			sent;
110 	u8			hit;
111 	struct vnet_mcast_entry	*next;
112 };
113 
114 struct vnet {
115 	spinlock_t		lock; /* Protects port_list and port_hash.  */
116 	struct net_device	*dev;
117 	u32			msg_enable;
118 	u8			q_used[VNET_MAX_TXQS];
119 	struct list_head	port_list;
120 	struct hlist_head	port_hash[VNET_PORT_HASH_SIZE];
121 	struct vnet_mcast_entry	*mcast_list;
122 	struct list_head	list;
123 	u64			local_mac;
124 	int			nports;
125 };
126 
127 /* Def used by common code to get the net_device from the proper location */
128 #define VNET_PORT_TO_NET_DEVICE(__port) \
129 	((__port)->vsw ? (__port)->dev : (__port)->vp->dev)
130 
131 /* Common funcs */
132 void sunvnet_clean_timer_expire_common(unsigned long port0);
133 int sunvnet_open_common(struct net_device *dev);
134 int sunvnet_close_common(struct net_device *dev);
135 void sunvnet_set_rx_mode_common(struct net_device *dev, struct vnet *vp);
136 int sunvnet_set_mac_addr_common(struct net_device *dev, void *p);
137 void sunvnet_tx_timeout_common(struct net_device *dev);
138 int sunvnet_start_xmit_common(struct sk_buff *skb, struct net_device *dev,
139 			   struct vnet_port *(*vnet_tx_port)
140 			   (struct sk_buff *, struct net_device *));
141 #ifdef CONFIG_NET_POLL_CONTROLLER
142 void sunvnet_poll_controller_common(struct net_device *dev, struct vnet *vp);
143 #endif
144 void sunvnet_event_common(void *arg, int event);
145 int sunvnet_send_attr_common(struct vio_driver_state *vio);
146 int sunvnet_handle_attr_common(struct vio_driver_state *vio, void *arg);
147 void sunvnet_handshake_complete_common(struct vio_driver_state *vio);
148 int sunvnet_poll_common(struct napi_struct *napi, int budget);
149 void sunvnet_port_free_tx_bufs_common(struct vnet_port *port);
150 void vnet_port_reset(struct vnet_port *port);
151 bool sunvnet_port_is_up_common(struct vnet_port *vnet);
152 void sunvnet_port_add_txq_common(struct vnet_port *port);
153 void sunvnet_port_rm_txq_common(struct vnet_port *port);
154 
155 #endif /* _SUNVNETCOMMON_H */
156