[linux-block.git] / include / linux / virtio_net.h

#ifndef _LINUX_VIRTIO_NET_H
#define _LINUX_VIRTIO_NET_H
#include <linux/virtio_config.h>

/* The ID for virtio_net */
#define VIRTIO_ID_NET	1

/* The feature bitmap for virtio net */
#define VIRTIO_NET_F_CSUM	0	/* Host handles pkts w/ partial csum */
#define VIRTIO_NET_F_GUEST_CSUM	1	/* Guest handles pkts w/ partial csum */
#define VIRTIO_NET_F_MAC	5	/* Host has given MAC address. */
#define VIRTIO_NET_F_GSO	6	/* Host handles pkts w/ any GSO type */
#define VIRTIO_NET_F_GUEST_TSO4	7	/* Guest can handle TSOv4 in. */
#define VIRTIO_NET_F_GUEST_TSO6	8	/* Guest can handle TSOv6 in. */
#define VIRTIO_NET_F_GUEST_ECN	9	/* Guest can handle TSO[6] w/ ECN in. */
#define VIRTIO_NET_F_GUEST_UFO	10	/* Guest can handle UFO in. */
#define VIRTIO_NET_F_HOST_TSO4	11	/* Host can handle TSOv4 in. */
#define VIRTIO_NET_F_HOST_TSO6	12	/* Host can handle TSOv6 in. */
#define VIRTIO_NET_F_HOST_ECN	13	/* Host can handle TSO[6] w/ ECN in. */
#define VIRTIO_NET_F_HOST_UFO	14	/* Host can handle UFO in. */

struct virtio_net_config
{
	/* The config defining mac address (if VIRTIO_NET_F_MAC) */
	__u8 mac[6];
} __attribute__((packed));

/* This is the first element of the scatter-gather list.  If you don't
 * specify GSO or CSUM features, you can simply ignore the header. */
struct virtio_net_hdr
{
#define VIRTIO_NET_HDR_F_NEEDS_CSUM	1	// Use csum_start, csum_offset
	__u8 flags;
#define VIRTIO_NET_HDR_GSO_NONE		0	// Not a GSO frame
#define VIRTIO_NET_HDR_GSO_TCPV4	1	// GSO frame, IPv4 TCP (TSO)
#define VIRTIO_NET_HDR_GSO_UDP		3	// GSO frame, IPv4 UDP (UFO)
#define VIRTIO_NET_HDR_GSO_TCPV6	4	// GSO frame, IPv6 TCP
#define VIRTIO_NET_HDR_GSO_ECN		0x80	// TCP has ECN set
	__u8 gso_type;
	__u16 hdr_len;		/* Ethernet + IP + tcp/udp hdrs */
	__u16 gso_size;		/* Bytes to append to hdr_len per frame */
	__u16 csum_start;	/* Position to start checksumming from */
	__u16 csum_offset;	/* Offset after that to place checksum */
};
#endif /* _LINUX_VIRTIO_NET_H */
Commit	Line	Data
296f96fc RR	1	#ifndef _LINUX_VIRTIO_NET_H
	2	#define _LINUX_VIRTIO_NET_H
	3	#include <linux/virtio_config.h>
	4
	5	/* The ID for virtio_net */
	6	#define VIRTIO_ID_NET 1
	7
a586d4f6	8	/* The feature bitmap for virtio net */
5539ae96 RR	9	#define VIRTIO_NET_F_CSUM 0 /* Host handles pkts w/ partial csum */
5539ae96 RR	10	#define VIRTIO_NET_F_GUEST_CSUM 1 /* Guest handles pkts w/ partial csum */
34a48579	11	#define VIRTIO_NET_F_MAC 5 /* Host has given MAC address. */
5539ae96 RR	12	#define VIRTIO_NET_F_GSO 6 /* Host handles pkts w/ any GSO type */
	13	#define VIRTIO_NET_F_GUEST_TSO4 7 /* Guest can handle TSOv4 in. */
	14	#define VIRTIO_NET_F_GUEST_TSO6 8 /* Guest can handle TSOv6 in. */
	15	#define VIRTIO_NET_F_GUEST_ECN 9 /* Guest can handle TSO[6] w/ ECN in. */
	16	#define VIRTIO_NET_F_GUEST_UFO 10 /* Guest can handle UFO in. */
	17	#define VIRTIO_NET_F_HOST_TSO4 11 /* Host can handle TSOv4 in. */
	18	#define VIRTIO_NET_F_HOST_TSO6 12 /* Host can handle TSOv6 in. */
	19	#define VIRTIO_NET_F_HOST_ECN 13 /* Host can handle TSO[6] w/ ECN in. */
	20	#define VIRTIO_NET_F_HOST_UFO 14 /* Host can handle UFO in. */
296f96fc	21
a586d4f6 RR	22	struct virtio_net_config
	23	{
	24	/* The config defining mac address (if VIRTIO_NET_F_MAC) */
	25	__u8 mac[6];
	26	} __attribute__((packed));
296f96fc RR	27
	28	/* This is the first element of the scatter-gather list. If you don't
	29	* specify GSO or CSUM features, you can simply ignore the header. */
	30	struct virtio_net_hdr
	31	{
	32	#define VIRTIO_NET_HDR_F_NEEDS_CSUM 1 // Use csum_start, csum_offset
50c8ea80	33	__u8 flags;
296f96fc RR	34	#define VIRTIO_NET_HDR_GSO_NONE 0 // Not a GSO frame
296f96fc RR	35	#define VIRTIO_NET_HDR_GSO_TCPV4 1 // GSO frame, IPv4 TCP (TSO)
296f96fc RR	36	#define VIRTIO_NET_HDR_GSO_UDP 3 // GSO frame, IPv4 UDP (UFO)
296f96fc RR	37	#define VIRTIO_NET_HDR_GSO_TCPV6 4 // GSO frame, IPv6 TCP
34a48579	38	#define VIRTIO_NET_HDR_GSO_ECN 0x80 // TCP has ECN set
50c8ea80 RR	39	__u8 gso_type;
50c8ea80 RR	40	__u16 hdr_len; /* Ethernet + IP + tcp/udp hdrs */
2506ece0	41	__u16 gso_size; /* Bytes to append to hdr_len per frame */
50c8ea80 RR	42	__u16 csum_start; /* Position to start checksumming from */
50c8ea80 RR	43	__u16 csum_offset; /* Offset after that to place checksum */
296f96fc RR	44	};
296f96fc RR	45	#endif /* _LINUX_VIRTIO_NET_H */