tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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 */