Add the rt linux 4.1.3-rt3 as base
[kvmfornfv.git] / kernel / drivers / net / ethernet / sun / sunvnet.h
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
34 struct vnet_tx_entry {
35         struct sk_buff          *skb;
36         unsigned int            ncookies;
37         struct ldc_trans_cookie cookies[VNET_MAXCOOKIES];
38 };
39
40 struct vnet;
41 struct 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
72 static 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
80 static 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
87 struct vnet_mcast_entry {
88         u8                      addr[ETH_ALEN];
89         u8                      sent;
90         u8                      hit;
91         struct vnet_mcast_entry *next;
92 };
93
94 struct 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 */