1*53ee8cc1Swenshuai.xi #ifndef _LINUX_VIRTIO_NET_H 2*53ee8cc1Swenshuai.xi #define _LINUX_VIRTIO_NET_H 3*53ee8cc1Swenshuai.xi #include <linux/virtio_config.h> 4*53ee8cc1Swenshuai.xi 5*53ee8cc1Swenshuai.xi /* The ID for virtio_net */ 6*53ee8cc1Swenshuai.xi #define VIRTIO_ID_NET 1 7*53ee8cc1Swenshuai.xi 8*53ee8cc1Swenshuai.xi /* The feature bitmap for virtio net */ 9*53ee8cc1Swenshuai.xi #define VIRTIO_NET_F_CSUM 0 /* Host handles pkts w/ partial csum */ 10*53ee8cc1Swenshuai.xi #define VIRTIO_NET_F_GUEST_CSUM 1 /* Guest handles pkts w/ partial csum */ 11*53ee8cc1Swenshuai.xi #define VIRTIO_NET_F_MAC 5 /* Host has given MAC address. */ 12*53ee8cc1Swenshuai.xi #define VIRTIO_NET_F_GSO 6 /* Host handles pkts w/ any GSO type */ 13*53ee8cc1Swenshuai.xi #define VIRTIO_NET_F_GUEST_TSO4 7 /* Guest can handle TSOv4 in. */ 14*53ee8cc1Swenshuai.xi #define VIRTIO_NET_F_GUEST_TSO6 8 /* Guest can handle TSOv6 in. */ 15*53ee8cc1Swenshuai.xi #define VIRTIO_NET_F_GUEST_ECN 9 /* Guest can handle TSO[6] w/ ECN in. */ 16*53ee8cc1Swenshuai.xi #define VIRTIO_NET_F_GUEST_UFO 10 /* Guest can handle UFO in. */ 17*53ee8cc1Swenshuai.xi #define VIRTIO_NET_F_HOST_TSO4 11 /* Host can handle TSOv4 in. */ 18*53ee8cc1Swenshuai.xi #define VIRTIO_NET_F_HOST_TSO6 12 /* Host can handle TSOv6 in. */ 19*53ee8cc1Swenshuai.xi #define VIRTIO_NET_F_HOST_ECN 13 /* Host can handle TSO[6] w/ ECN in. */ 20*53ee8cc1Swenshuai.xi #define VIRTIO_NET_F_HOST_UFO 14 /* Host can handle UFO in. */ 21*53ee8cc1Swenshuai.xi 22*53ee8cc1Swenshuai.xi struct virtio_net_config 23*53ee8cc1Swenshuai.xi { 24*53ee8cc1Swenshuai.xi /* The config defining mac address (if VIRTIO_NET_F_MAC) */ 25*53ee8cc1Swenshuai.xi __u8 mac[6]; 26*53ee8cc1Swenshuai.xi } __attribute__((packed)); 27*53ee8cc1Swenshuai.xi 28*53ee8cc1Swenshuai.xi /* This is the first element of the scatter-gather list. If you don't 29*53ee8cc1Swenshuai.xi * specify GSO or CSUM features, you can simply ignore the header. */ 30*53ee8cc1Swenshuai.xi struct virtio_net_hdr 31*53ee8cc1Swenshuai.xi { 32*53ee8cc1Swenshuai.xi #define VIRTIO_NET_HDR_F_NEEDS_CSUM 1 // Use csum_start, csum_offset 33*53ee8cc1Swenshuai.xi __u8 flags; 34*53ee8cc1Swenshuai.xi #define VIRTIO_NET_HDR_GSO_NONE 0 // Not a GSO frame 35*53ee8cc1Swenshuai.xi #define VIRTIO_NET_HDR_GSO_TCPV4 1 // GSO frame, IPv4 TCP (TSO) 36*53ee8cc1Swenshuai.xi #define VIRTIO_NET_HDR_GSO_UDP 3 // GSO frame, IPv4 UDP (UFO) 37*53ee8cc1Swenshuai.xi #define VIRTIO_NET_HDR_GSO_TCPV6 4 // GSO frame, IPv6 TCP 38*53ee8cc1Swenshuai.xi #define VIRTIO_NET_HDR_GSO_ECN 0x80 // TCP has ECN set 39*53ee8cc1Swenshuai.xi __u8 gso_type; 40*53ee8cc1Swenshuai.xi __u16 hdr_len; /* Ethernet + IP + tcp/udp hdrs */ 41*53ee8cc1Swenshuai.xi __u16 gso_size; /* Bytes to append to hdr_len per frame */ 42*53ee8cc1Swenshuai.xi __u16 csum_start; /* Position to start checksumming from */ 43*53ee8cc1Swenshuai.xi __u16 csum_offset; /* Offset after that to place checksum */ 44*53ee8cc1Swenshuai.xi }; 45*53ee8cc1Swenshuai.xi #endif /* _LINUX_VIRTIO_NET_H */ 46