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1 | #ifndef _LINUX_VIRTIO_NET_H |
2 | #define _LINUX_VIRTIO_NET_H | |
674bfc23 RR |
3 | /* This header is BSD licensed so anyone can use the definitions to implement |
4 | * compatible drivers/servers. */ | |
296f96fc RR |
5 | #include <linux/virtio_config.h> |
6 | ||
7 | /* The ID for virtio_net */ | |
8 | #define VIRTIO_ID_NET 1 | |
9 | ||
a586d4f6 | 10 | /* The feature bitmap for virtio net */ |
5539ae96 RR |
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 */ | |
34a48579 | 13 | #define VIRTIO_NET_F_MAC 5 /* Host has given MAC address. */ |
5539ae96 RR |
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. */ | |
3f2c31d9 | 23 | #define VIRTIO_NET_F_MRG_RXBUF 15 /* Host can merge receive buffers. */ |
296f96fc | 24 | |
a586d4f6 RR |
25 | struct virtio_net_config |
26 | { | |
27 | /* The config defining mac address (if VIRTIO_NET_F_MAC) */ | |
28 | __u8 mac[6]; | |
29 | } __attribute__((packed)); | |
296f96fc RR |
30 | |
31 | /* This is the first element of the scatter-gather list. If you don't | |
32 | * specify GSO or CSUM features, you can simply ignore the header. */ | |
33 | struct virtio_net_hdr | |
34 | { | |
35 | #define VIRTIO_NET_HDR_F_NEEDS_CSUM 1 // Use csum_start, csum_offset | |
50c8ea80 | 36 | __u8 flags; |
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37 | #define VIRTIO_NET_HDR_GSO_NONE 0 // Not a GSO frame |
38 | #define VIRTIO_NET_HDR_GSO_TCPV4 1 // GSO frame, IPv4 TCP (TSO) | |
296f96fc RR |
39 | #define VIRTIO_NET_HDR_GSO_UDP 3 // GSO frame, IPv4 UDP (UFO) |
40 | #define VIRTIO_NET_HDR_GSO_TCPV6 4 // GSO frame, IPv6 TCP | |
34a48579 | 41 | #define VIRTIO_NET_HDR_GSO_ECN 0x80 // TCP has ECN set |
50c8ea80 RR |
42 | __u8 gso_type; |
43 | __u16 hdr_len; /* Ethernet + IP + tcp/udp hdrs */ | |
2506ece0 | 44 | __u16 gso_size; /* Bytes to append to hdr_len per frame */ |
50c8ea80 RR |
45 | __u16 csum_start; /* Position to start checksumming from */ |
46 | __u16 csum_offset; /* Offset after that to place checksum */ | |
296f96fc | 47 | }; |
3f2c31d9 MM |
48 | |
49 | /* This is the version of the header to use when the MRG_RXBUF | |
50 | * feature has been negotiated. */ | |
51 | struct virtio_net_hdr_mrg_rxbuf { | |
52 | struct virtio_net_hdr hdr; | |
53 | __u16 num_buffers; /* Number of merged rx buffers */ | |
54 | }; | |
55 | ||
296f96fc | 56 | #endif /* _LINUX_VIRTIO_NET_H */ |