projects / deliverable / linux.git / blame
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1 | #ifndef _LINUX_VIRTIO_NET_H |
| 2 | #define _LINUX_VIRTIO_NET_H | |
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3 | /* This header is BSD licensed so anyone can use the definitions to implement |
| 4 | * compatible drivers/servers. */ | |
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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 */ |
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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. */ |
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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. */ | |
| 296f96fc | 23 | |
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24 | struct virtio_net_config |
| 25 | { | |
| 26 | /* The config defining mac address (if VIRTIO_NET_F_MAC) */ | |
| 27 | __u8 mac[6]; | |
| 28 | } __attribute__((packed)); | |
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29 | |
| 30 | /* This is the first element of the scatter-gather list. If you don't | |
| 31 | * specify GSO or CSUM features, you can simply ignore the header. */ | |
| 32 | struct virtio_net_hdr | |
| 33 | { | |
| 34 | #define VIRTIO_NET_HDR_F_NEEDS_CSUM 1 // Use csum_start, csum_offset | |
| 50c8ea80 | 35 | __u8 flags; |
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36 | #define VIRTIO_NET_HDR_GSO_NONE 0 // Not a GSO frame |
| 37 | #define VIRTIO_NET_HDR_GSO_TCPV4 1 // GSO frame, IPv4 TCP (TSO) | |
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38 | #define VIRTIO_NET_HDR_GSO_UDP 3 // GSO frame, IPv4 UDP (UFO) |
| 39 | #define VIRTIO_NET_HDR_GSO_TCPV6 4 // GSO frame, IPv6 TCP | |
| 34a48579 | 40 | #define VIRTIO_NET_HDR_GSO_ECN 0x80 // TCP has ECN set |
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41 | __u8 gso_type; |
| 42 | __u16 hdr_len; /* Ethernet + IP + tcp/udp hdrs */ | |
| 2506ece0 | 43 | __u16 gso_size; /* Bytes to append to hdr_len per frame */ |
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44 | __u16 csum_start; /* Position to start checksumming from */ |
| 45 | __u16 csum_offset; /* Offset after that to place checksum */ | |
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46 | }; |
| 47 | #endif /* _LINUX_VIRTIO_NET_H */ |