Loading...
1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _SUNVNETCOMMON_H
3#define _SUNVNETCOMMON_H
4
5#include <linux/interrupt.h>
6
7/* length of time (or less) we expect pending descriptors to be marked
8 * as VIO_DESC_DONE and skbs ready to be freed
9 */
10#define VNET_CLEAN_TIMEOUT ((HZ / 100) + 1)
11
12#define VNET_MAXPACKET (65535ULL + ETH_HLEN + VLAN_HLEN)
13#define VNET_TX_RING_SIZE 512
14#define VNET_TX_WAKEUP_THRESH(dr) ((dr)->pending / 4)
15
16#define VNET_MINTSO 2048 /* VIO protocol's minimum TSO len */
17#define VNET_MAXTSO 65535 /* VIO protocol's maximum TSO len */
18
19#define VNET_MAX_MTU 65535
20
21/* VNET packets are sent in buffers with the first 6 bytes skipped
22 * so that after the ethernet header the IPv4/IPv6 headers are aligned
23 * properly.
24 */
25#define VNET_PACKET_SKIP 6
26
27#define VNET_MAXCOOKIES (VNET_MAXPACKET / PAGE_SIZE + 1)
28
29#define VNET_MAX_TXQS 16
30
31struct vnet_tx_entry {
32 struct sk_buff *skb;
33 unsigned int ncookies;
34 struct ldc_trans_cookie cookies[VNET_MAXCOOKIES];
35};
36
37struct vnet;
38
39struct vnet_port_stats {
40 /* keep them all the same size */
41 u32 rx_bytes;
42 u32 tx_bytes;
43 u32 rx_packets;
44 u32 tx_packets;
45 u32 event_up;
46 u32 event_reset;
47 u32 q_placeholder;
48};
49
50#define NUM_VNET_PORT_STATS (sizeof(struct vnet_port_stats) / sizeof(u32))
51
52/* Structure to describe a vnet-port or vsw-port in the MD.
53 * If the vsw bit is set, this structure represents a vswitch
54 * port, and the net_device can be found from ->dev. If the
55 * vsw bit is not set, the net_device is available from ->vp->dev.
56 * See the VNET_PORT_TO_NET_DEVICE macro below.
57 */
58struct vnet_port {
59 struct vio_driver_state vio;
60
61 struct vnet_port_stats stats;
62
63 struct hlist_node hash;
64 u8 raddr[ETH_ALEN];
65 unsigned switch_port:1;
66 unsigned tso:1;
67 unsigned vsw:1;
68 unsigned __pad:13;
69
70 struct vnet *vp;
71 struct net_device *dev;
72
73 struct vnet_tx_entry tx_bufs[VNET_TX_RING_SIZE];
74
75 struct list_head list;
76
77 u32 stop_rx_idx;
78 bool stop_rx;
79 bool start_cons;
80
81 struct timer_list clean_timer;
82
83 u64 rmtu;
84 u16 tsolen;
85
86 struct napi_struct napi;
87 u32 napi_stop_idx;
88 bool napi_resume;
89 int rx_event;
90 u16 q_index;
91};
92
93static inline struct vnet_port *to_vnet_port(struct vio_driver_state *vio)
94{
95 return container_of(vio, struct vnet_port, vio);
96}
97
98#define VNET_PORT_HASH_SIZE 16
99#define VNET_PORT_HASH_MASK (VNET_PORT_HASH_SIZE - 1)
100
101static inline unsigned int vnet_hashfn(u8 *mac)
102{
103 unsigned int val = mac[4] ^ mac[5];
104
105 return val & (VNET_PORT_HASH_MASK);
106}
107
108struct vnet_mcast_entry {
109 u8 addr[ETH_ALEN];
110 u8 sent;
111 u8 hit;
112 struct vnet_mcast_entry *next;
113};
114
115struct vnet {
116 spinlock_t lock; /* Protects port_list and port_hash. */
117 struct net_device *dev;
118 u32 msg_enable;
119 u8 q_used[VNET_MAX_TXQS];
120 struct list_head port_list;
121 struct hlist_head port_hash[VNET_PORT_HASH_SIZE];
122 struct vnet_mcast_entry *mcast_list;
123 struct list_head list;
124 u64 local_mac;
125 int nports;
126};
127
128/* Def used by common code to get the net_device from the proper location */
129#define VNET_PORT_TO_NET_DEVICE(__port) \
130 ((__port)->vsw ? (__port)->dev : (__port)->vp->dev)
131
132/* Common funcs */
133void sunvnet_clean_timer_expire_common(struct timer_list *t);
134int sunvnet_open_common(struct net_device *dev);
135int sunvnet_close_common(struct net_device *dev);
136void sunvnet_set_rx_mode_common(struct net_device *dev, struct vnet *vp);
137int sunvnet_set_mac_addr_common(struct net_device *dev, void *p);
138void sunvnet_tx_timeout_common(struct net_device *dev, unsigned int txqueue);
139netdev_tx_t
140sunvnet_start_xmit_common(struct sk_buff *skb, struct net_device *dev,
141 struct vnet_port *(*vnet_tx_port)
142 (struct sk_buff *, struct net_device *));
143#ifdef CONFIG_NET_POLL_CONTROLLER
144void sunvnet_poll_controller_common(struct net_device *dev, struct vnet *vp);
145#endif
146void sunvnet_event_common(void *arg, int event);
147int sunvnet_send_attr_common(struct vio_driver_state *vio);
148int sunvnet_handle_attr_common(struct vio_driver_state *vio, void *arg);
149void sunvnet_handshake_complete_common(struct vio_driver_state *vio);
150int sunvnet_poll_common(struct napi_struct *napi, int budget);
151void sunvnet_port_free_tx_bufs_common(struct vnet_port *port);
152void vnet_port_reset(struct vnet_port *port);
153bool sunvnet_port_is_up_common(struct vnet_port *vnet);
154void sunvnet_port_add_txq_common(struct vnet_port *port);
155void sunvnet_port_rm_txq_common(struct vnet_port *port);
156
157#endif /* _SUNVNETCOMMON_H */
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
30struct vnet_tx_entry {
31 struct sk_buff *skb;
32 unsigned int ncookies;
33 struct ldc_trans_cookie cookies[VNET_MAXCOOKIES];
34};
35
36struct 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 */
44struct 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
77static 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
85static 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
92struct vnet_mcast_entry {
93 u8 addr[ETH_ALEN];
94 u8 sent;
95 u8 hit;
96 struct vnet_mcast_entry *next;
97};
98
99struct 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 */
124void sunvnet_clean_timer_expire_common(unsigned long port0);
125int sunvnet_open_common(struct net_device *dev);
126int sunvnet_close_common(struct net_device *dev);
127void sunvnet_set_rx_mode_common(struct net_device *dev, struct vnet *vp);
128int sunvnet_set_mac_addr_common(struct net_device *dev, void *p);
129void sunvnet_tx_timeout_common(struct net_device *dev);
130int 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
134void sunvnet_poll_controller_common(struct net_device *dev, struct vnet *vp);
135#endif
136void sunvnet_event_common(void *arg, int event);
137int sunvnet_send_attr_common(struct vio_driver_state *vio);
138int sunvnet_handle_attr_common(struct vio_driver_state *vio, void *arg);
139void sunvnet_handshake_complete_common(struct vio_driver_state *vio);
140int sunvnet_poll_common(struct napi_struct *napi, int budget);
141void sunvnet_port_free_tx_bufs_common(struct vnet_port *port);
142bool sunvnet_port_is_up_common(struct vnet_port *vnet);
143void sunvnet_port_add_txq_common(struct vnet_port *port);
144void sunvnet_port_rm_txq_common(struct vnet_port *port);
145
146#endif /* _SUNVNETCOMMON_H */