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Annotation of qemu/roms/ipxe/src/drivers/net/virtio-net.h, revision 1.1

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

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