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 | |
31 | struct vnet_tx_entry { |
32 | struct sk_buff *skb; |
33 | unsigned int ncookies; |
34 | struct ldc_trans_cookie cookies[VNET_MAXCOOKIES]; |
35 | }; |
36 | |
37 | struct vnet; |
38 | |
39 | struct 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 | */ |
58 | struct 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 | |
93 | static 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 | |
101 | static 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 | |
108 | struct vnet_mcast_entry { |
109 | u8 addr[ETH_ALEN]; |
110 | u8 sent; |
111 | u8 hit; |
112 | struct vnet_mcast_entry *next; |
113 | }; |
114 | |
115 | struct 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 */ |
133 | void sunvnet_clean_timer_expire_common(struct timer_list *t); |
134 | int sunvnet_open_common(struct net_device *dev); |
135 | int sunvnet_close_common(struct net_device *dev); |
136 | void sunvnet_set_rx_mode_common(struct net_device *dev, struct vnet *vp); |
137 | int sunvnet_set_mac_addr_common(struct net_device *dev, void *p); |
138 | void sunvnet_tx_timeout_common(struct net_device *dev, unsigned int txqueue); |
139 | netdev_tx_t |
140 | sunvnet_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 |
144 | void sunvnet_poll_controller_common(struct net_device *dev, struct vnet *vp); |
145 | #endif |
146 | void sunvnet_event_common(void *arg, int event); |
147 | int sunvnet_send_attr_common(struct vio_driver_state *vio); |
148 | int sunvnet_handle_attr_common(struct vio_driver_state *vio, void *arg); |
149 | void sunvnet_handshake_complete_common(struct vio_driver_state *vio); |
150 | int sunvnet_poll_common(struct napi_struct *napi, int budget); |
151 | void sunvnet_port_free_tx_bufs_common(struct vnet_port *port); |
152 | void vnet_port_reset(struct vnet_port *port); |
153 | bool sunvnet_port_is_up_common(struct vnet_port *vnet); |
154 | void sunvnet_port_add_txq_common(struct vnet_port *port); |
155 | void sunvnet_port_rm_txq_common(struct vnet_port *port); |
156 | |
157 | #endif /* _SUNVNETCOMMON_H */ |
158 | |