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  • only in /asuswrt-rt-n18u-9.0.0.4.380.2695/release/src-rt-6.x.4708/toolchains/hndtools-arm-linux-2.6.36-uclibc-4.5.3/usr/include/linux/
1#ifndef _LINUX_VIRTIO_NET_H
2#define _LINUX_VIRTIO_NET_H
3/* This header is BSD licensed so anyone can use the definitions to implement
4 * compatible drivers/servers. */
5#include <linux/types.h>
6#include <linux/virtio_ids.h>
7#include <linux/virtio_config.h>
8#include <linux/if_ether.h>
9
10/* The feature bitmap for virtio net */
11#define VIRTIO_NET_F_CSUM	0	/* Host handles pkts w/ partial csum */
12#define VIRTIO_NET_F_GUEST_CSUM	1	/* Guest handles pkts w/ partial csum */
13#define VIRTIO_NET_F_MAC	5	/* Host has given MAC address. */
14#define VIRTIO_NET_F_GSO	6	/* Host handles pkts w/ any GSO type */
15#define VIRTIO_NET_F_GUEST_TSO4	7	/* Guest can handle TSOv4 in. */
16#define VIRTIO_NET_F_GUEST_TSO6	8	/* Guest can handle TSOv6 in. */
17#define VIRTIO_NET_F_GUEST_ECN	9	/* Guest can handle TSO[6] w/ ECN in. */
18#define VIRTIO_NET_F_GUEST_UFO	10	/* Guest can handle UFO in. */
19#define VIRTIO_NET_F_HOST_TSO4	11	/* Host can handle TSOv4 in. */
20#define VIRTIO_NET_F_HOST_TSO6	12	/* Host can handle TSOv6 in. */
21#define VIRTIO_NET_F_HOST_ECN	13	/* Host can handle TSO[6] w/ ECN in. */
22#define VIRTIO_NET_F_HOST_UFO	14	/* Host can handle UFO in. */
23#define VIRTIO_NET_F_MRG_RXBUF	15	/* Host can merge receive buffers. */
24#define VIRTIO_NET_F_STATUS	16	/* virtio_net_config.status available */
25#define VIRTIO_NET_F_CTRL_VQ	17	/* Control channel available */
26#define VIRTIO_NET_F_CTRL_RX	18	/* Control channel RX mode support */
27#define VIRTIO_NET_F_CTRL_VLAN	19	/* Control channel VLAN filtering */
28#define VIRTIO_NET_F_CTRL_RX_EXTRA 20	/* Extra RX mode control support */
29
30#define VIRTIO_NET_S_LINK_UP	1	/* Link is up */
31
32struct virtio_net_config {
33	/* The config defining mac address (if VIRTIO_NET_F_MAC) */
34	__u8 mac[6];
35	/* See VIRTIO_NET_F_STATUS and VIRTIO_NET_S_* above */
36	__u16 status;
37} __attribute__((packed));
38
39/* This is the first element of the scatter-gather list.  If you don't
40 * specify GSO or CSUM features, you can simply ignore the header. */
41struct virtio_net_hdr {
42#define VIRTIO_NET_HDR_F_NEEDS_CSUM	1	// Use csum_start, csum_offset
43	__u8 flags;
44#define VIRTIO_NET_HDR_GSO_NONE		0	// Not a GSO frame
45#define VIRTIO_NET_HDR_GSO_TCPV4	1	// GSO frame, IPv4 TCP (TSO)
46#define VIRTIO_NET_HDR_GSO_UDP		3	// GSO frame, IPv4 UDP (UFO)
47#define VIRTIO_NET_HDR_GSO_TCPV6	4	// GSO frame, IPv6 TCP
48#define VIRTIO_NET_HDR_GSO_ECN		0x80	// TCP has ECN set
49	__u8 gso_type;
50	__u16 hdr_len;		/* Ethernet + IP + tcp/udp hdrs */
51	__u16 gso_size;		/* Bytes to append to hdr_len per frame */
52	__u16 csum_start;	/* Position to start checksumming from */
53	__u16 csum_offset;	/* Offset after that to place checksum */
54};
55
56/* This is the version of the header to use when the MRG_RXBUF
57 * feature has been negotiated. */
58struct virtio_net_hdr_mrg_rxbuf {
59	struct virtio_net_hdr hdr;
60	__u16 num_buffers;	/* Number of merged rx buffers */
61};
62
63/*
64 * Control virtqueue data structures
65 *
66 * The control virtqueue expects a header in the first sg entry
67 * and an ack/status response in the last entry.  Data for the
68 * command goes in between.
69 */
70struct virtio_net_ctrl_hdr {
71	__u8 class;
72	__u8 cmd;
73} __attribute__((packed));
74
75typedef __u8 virtio_net_ctrl_ack;
76
77#define VIRTIO_NET_OK     0
78#define VIRTIO_NET_ERR    1
79
80/*
81 * Control the RX mode, ie. promisucous, allmulti, etc...
82 * All commands require an "out" sg entry containing a 1 byte
83 * state value, zero = disable, non-zero = enable.  Commands
84 * 0 and 1 are supported with the VIRTIO_NET_F_CTRL_RX feature.
85 * Commands 2-5 are added with VIRTIO_NET_F_CTRL_RX_EXTRA.
86 */
87#define VIRTIO_NET_CTRL_RX    0
88 #define VIRTIO_NET_CTRL_RX_PROMISC      0
89 #define VIRTIO_NET_CTRL_RX_ALLMULTI     1
90 #define VIRTIO_NET_CTRL_RX_ALLUNI       2
91 #define VIRTIO_NET_CTRL_RX_NOMULTI      3
92 #define VIRTIO_NET_CTRL_RX_NOUNI        4
93 #define VIRTIO_NET_CTRL_RX_NOBCAST      5
94
95/*
96 * Control the MAC filter table.
97 *
98 * The MAC filter table is managed by the hypervisor, the guest should
99 * assume the size is infinite.  Filtering should be considered
100 * non-perfect, ie. based on hypervisor resources, the guest may
101 * received packets from sources not specified in the filter list.
102 *
103 * In addition to the class/cmd header, the TABLE_SET command requires
104 * two out scatterlists.  Each contains a 4 byte count of entries followed
105 * by a concatenated byte stream of the ETH_ALEN MAC addresses.  The
106 * first sg list contains unicast addresses, the second is for multicast.
107 * This functionality is present if the VIRTIO_NET_F_CTRL_RX feature
108 * is available.
109 */
110struct virtio_net_ctrl_mac {
111	__u32 entries;
112	__u8 macs[][ETH_ALEN];
113} __attribute__((packed));
114
115#define VIRTIO_NET_CTRL_MAC    1
116 #define VIRTIO_NET_CTRL_MAC_TABLE_SET        0
117
118/*
119 * Control VLAN filtering
120 *
121 * The VLAN filter table is controlled via a simple ADD/DEL interface.
122 * VLAN IDs not added may be filterd by the hypervisor.  Del is the
123 * opposite of add.  Both commands expect an out entry containing a 2
124 * byte VLAN ID.  VLAN filterting is available with the
125 * VIRTIO_NET_F_CTRL_VLAN feature bit.
126 */
127#define VIRTIO_NET_CTRL_VLAN       2
128 #define VIRTIO_NET_CTRL_VLAN_ADD             0
129 #define VIRTIO_NET_CTRL_VLAN_DEL             1
130
131#endif /* _LINUX_VIRTIO_NET_H */
132