2 * Virtio Network Device
4 * Copyright IBM, Corp. 2007
7 * Anthony Liguori <aliguori@us.ibm.com>
9 * This work is licensed under the terms of the GNU GPL, version 2. See
10 * the COPYING file in the top-level directory.
14 #ifndef _QEMU_VIRTIO_NET_H
15 #define _QEMU_VIRTIO_NET_H
21 /* from Linux's virtio_net.h */
23 /* The ID for virtio_net */
24 #define VIRTIO_ID_NET 1
26 /* The feature bitmap for virtio net */
27 #define VIRTIO_NET_F_CSUM 0 /* Host handles pkts w/ partial csum */
28 #define VIRTIO_NET_F_GUEST_CSUM 1 /* Guest handles pkts w/ partial csum */
29 #define VIRTIO_NET_F_MAC 5 /* Host has given MAC address. */
30 #define VIRTIO_NET_F_GSO 6 /* Host handles pkts w/ any GSO type */
31 #define VIRTIO_NET_F_GUEST_TSO4 7 /* Guest can handle TSOv4 in. */
32 #define VIRTIO_NET_F_GUEST_TSO6 8 /* Guest can handle TSOv6 in. */
33 #define VIRTIO_NET_F_GUEST_ECN 9 /* Guest can handle TSO[6] w/ ECN in. */
34 #define VIRTIO_NET_F_GUEST_UFO 10 /* Guest can handle UFO in. */
35 #define VIRTIO_NET_F_HOST_TSO4 11 /* Host can handle TSOv4 in. */
36 #define VIRTIO_NET_F_HOST_TSO6 12 /* Host can handle TSOv6 in. */
37 #define VIRTIO_NET_F_HOST_ECN 13 /* Host can handle TSO[6] w/ ECN in. */
38 #define VIRTIO_NET_F_HOST_UFO 14 /* Host can handle UFO in. */
39 #define VIRTIO_NET_F_MRG_RXBUF 15 /* Host can merge receive buffers. */
41 #define TX_TIMER_INTERVAL 150000 /* 150 us */
43 /* Maximum packet size we can receive from tap device: header + 64k */
44 #define VIRTIO_NET_MAX_BUFSIZE (sizeof(struct virtio_net_hdr) + (64 << 10))
46 /* The config defining mac address (6 bytes) */
47 struct virtio_net_config
50 } __attribute__((packed
));
52 /* This is the first element of the scatter-gather list. If you don't
53 * specify GSO or CSUM features, you can simply ignore the header. */
56 #define VIRTIO_NET_HDR_F_NEEDS_CSUM 1 // Use csum_start, csum_offset
58 #define VIRTIO_NET_HDR_GSO_NONE 0 // Not a GSO frame
59 #define VIRTIO_NET_HDR_GSO_TCPV4 1 // GSO frame, IPv4 TCP (TSO)
60 #define VIRTIO_NET_HDR_GSO_UDP 3 // GSO frame, IPv4 UDP (UFO)
61 #define VIRTIO_NET_HDR_GSO_TCPV6 4 // GSO frame, IPv6 TCP
62 #define VIRTIO_NET_HDR_GSO_ECN 0x80 // TCP has ECN set
70 /* This is the version of the header to use when the MRG_RXBUF
71 * feature has been negotiated. */
72 struct virtio_net_hdr_mrg_rxbuf
74 struct virtio_net_hdr hdr
;
75 uint16_t num_buffers
; /* Number of merged rx buffers */
78 PCIDevice
*virtio_net_init(PCIBus
*bus
, NICInfo
*nd
, int devfn
);