1 | #ifndef _VIRTIO_NET_H_ |
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2 | # define _VIRTIO_NET_H_ |
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3 | |
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4 | /* The feature bitmap for virtio net */ |
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5 | #define VIRTIO_NET_F_CSUM 0 /* Host handles pkts w/ partial csum */ |
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6 | #define VIRTIO_NET_F_GUEST_CSUM 1 /* Guest handles pkts w/ partial csum */ |
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7 | #define VIRTIO_NET_F_MAC 5 /* Host has given MAC address. */ |
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8 | #define VIRTIO_NET_F_GSO 6 /* Host handles pkts w/ any GSO type */ |
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9 | #define VIRTIO_NET_F_GUEST_TSO4 7 /* Guest can handle TSOv4 in. */ |
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10 | #define VIRTIO_NET_F_GUEST_TSO6 8 /* Guest can handle TSOv6 in. */ |
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11 | #define VIRTIO_NET_F_GUEST_ECN 9 /* Guest can handle TSO[6] w/ ECN in. */ |
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12 | #define VIRTIO_NET_F_GUEST_UFO 10 /* Guest can handle UFO in. */ |
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13 | #define VIRTIO_NET_F_HOST_TSO4 11 /* Host can handle TSOv4 in. */ |
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14 | #define VIRTIO_NET_F_HOST_TSO6 12 /* Host can handle TSOv6 in. */ |
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15 | #define VIRTIO_NET_F_HOST_ECN 13 /* Host can handle TSO[6] w/ ECN in. */ |
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16 | #define VIRTIO_NET_F_HOST_UFO 14 /* Host can handle UFO in. */ |
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17 | |
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18 | struct virtio_net_config |
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19 | { |
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20 | /* The config defining mac address (if VIRTIO_NET_F_MAC) */ |
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21 | u8 mac[6]; |
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22 | } __attribute__((packed)); |
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23 | |
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24 | /* This is the first element of the scatter-gather list. If you don't |
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25 | * specify GSO or CSUM features, you can simply ignore the header. */ |
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26 | |
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27 | struct virtio_net_hdr |
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28 | { |
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29 | #define VIRTIO_NET_HDR_F_NEEDS_CSUM 1 // Use csum_start, csum_offset |
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30 | uint8_t flags; |
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31 | #define VIRTIO_NET_HDR_GSO_NONE 0 // Not a GSO frame |
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32 | #define VIRTIO_NET_HDR_GSO_TCPV4 1 // GSO frame, IPv4 TCP (TSO) |
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33 | /* FIXME: Do we need this? If they said they can handle ECN, do they care? */ |
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34 | #define VIRTIO_NET_HDR_GSO_TCPV4_ECN 2 // GSO frame, IPv4 TCP w/ ECN |
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35 | #define VIRTIO_NET_HDR_GSO_UDP 3 // GSO frame, IPv4 UDP (UFO) |
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36 | #define VIRTIO_NET_HDR_GSO_TCPV6 4 // GSO frame, IPv6 TCP |
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37 | #define VIRTIO_NET_HDR_GSO_ECN 0x80 // TCP has ECN set |
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38 | uint8_t gso_type; |
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39 | uint16_t hdr_len; |
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40 | uint16_t gso_size; |
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41 | uint16_t csum_start; |
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42 | uint16_t csum_offset; |
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43 | }; |
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44 | #endif /* _VIRTIO_NET_H_ */ |
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