3ca4f5ca73
Virtio IDs are spread all over the tree which makes assigning new IDs bothersome. Putting them together should make the process less error-prone. Signed-off-by: Fernando Luis Vazquez Cao <fernando@oss.ntt.co.jp> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
130 lines
5 KiB
C
130 lines
5 KiB
C
#ifndef _LINUX_VIRTIO_NET_H
|
|
#define _LINUX_VIRTIO_NET_H
|
|
/* This header is BSD licensed so anyone can use the definitions to implement
|
|
* compatible drivers/servers. */
|
|
#include <linux/types.h>
|
|
#include <linux/virtio_config.h>
|
|
#include <linux/if_ether.h>
|
|
|
|
/* 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. */
|
|
#define VIRTIO_NET_F_MRG_RXBUF 15 /* Host can merge receive buffers. */
|
|
#define VIRTIO_NET_F_STATUS 16 /* virtio_net_config.status available */
|
|
#define VIRTIO_NET_F_CTRL_VQ 17 /* Control channel available */
|
|
#define VIRTIO_NET_F_CTRL_RX 18 /* Control channel RX mode support */
|
|
#define VIRTIO_NET_F_CTRL_VLAN 19 /* Control channel VLAN filtering */
|
|
#define VIRTIO_NET_F_CTRL_RX_EXTRA 20 /* Extra RX mode control support */
|
|
|
|
#define VIRTIO_NET_S_LINK_UP 1 /* Link is up */
|
|
|
|
struct virtio_net_config {
|
|
/* The config defining mac address (if VIRTIO_NET_F_MAC) */
|
|
__u8 mac[6];
|
|
/* See VIRTIO_NET_F_STATUS and VIRTIO_NET_S_* above */
|
|
__u16 status;
|
|
} __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 */
|
|
};
|
|
|
|
/* This is the version of the header to use when the MRG_RXBUF
|
|
* feature has been negotiated. */
|
|
struct virtio_net_hdr_mrg_rxbuf {
|
|
struct virtio_net_hdr hdr;
|
|
__u16 num_buffers; /* Number of merged rx buffers */
|
|
};
|
|
|
|
/*
|
|
* Control virtqueue data structures
|
|
*
|
|
* The control virtqueue expects a header in the first sg entry
|
|
* and an ack/status response in the last entry. Data for the
|
|
* command goes in between.
|
|
*/
|
|
struct virtio_net_ctrl_hdr {
|
|
__u8 class;
|
|
__u8 cmd;
|
|
} __attribute__((packed));
|
|
|
|
typedef __u8 virtio_net_ctrl_ack;
|
|
|
|
#define VIRTIO_NET_OK 0
|
|
#define VIRTIO_NET_ERR 1
|
|
|
|
/*
|
|
* Control the RX mode, ie. promisucous, allmulti, etc...
|
|
* All commands require an "out" sg entry containing a 1 byte
|
|
* state value, zero = disable, non-zero = enable. Commands
|
|
* 0 and 1 are supported with the VIRTIO_NET_F_CTRL_RX feature.
|
|
* Commands 2-5 are added with VIRTIO_NET_F_CTRL_RX_EXTRA.
|
|
*/
|
|
#define VIRTIO_NET_CTRL_RX 0
|
|
#define VIRTIO_NET_CTRL_RX_PROMISC 0
|
|
#define VIRTIO_NET_CTRL_RX_ALLMULTI 1
|
|
#define VIRTIO_NET_CTRL_RX_ALLUNI 2
|
|
#define VIRTIO_NET_CTRL_RX_NOMULTI 3
|
|
#define VIRTIO_NET_CTRL_RX_NOUNI 4
|
|
#define VIRTIO_NET_CTRL_RX_NOBCAST 5
|
|
|
|
/*
|
|
* Control the MAC filter table.
|
|
*
|
|
* The MAC filter table is managed by the hypervisor, the guest should
|
|
* assume the size is infinite. Filtering should be considered
|
|
* non-perfect, ie. based on hypervisor resources, the guest may
|
|
* received packets from sources not specified in the filter list.
|
|
*
|
|
* In addition to the class/cmd header, the TABLE_SET command requires
|
|
* two out scatterlists. Each contains a 4 byte count of entries followed
|
|
* by a concatenated byte stream of the ETH_ALEN MAC addresses. The
|
|
* first sg list contains unicast addresses, the second is for multicast.
|
|
* This functionality is present if the VIRTIO_NET_F_CTRL_RX feature
|
|
* is available.
|
|
*/
|
|
struct virtio_net_ctrl_mac {
|
|
__u32 entries;
|
|
__u8 macs[][ETH_ALEN];
|
|
} __attribute__((packed));
|
|
|
|
#define VIRTIO_NET_CTRL_MAC 1
|
|
#define VIRTIO_NET_CTRL_MAC_TABLE_SET 0
|
|
|
|
/*
|
|
* Control VLAN filtering
|
|
*
|
|
* The VLAN filter table is controlled via a simple ADD/DEL interface.
|
|
* VLAN IDs not added may be filterd by the hypervisor. Del is the
|
|
* opposite of add. Both commands expect an out entry containing a 2
|
|
* byte VLAN ID. VLAN filterting is available with the
|
|
* VIRTIO_NET_F_CTRL_VLAN feature bit.
|
|
*/
|
|
#define VIRTIO_NET_CTRL_VLAN 2
|
|
#define VIRTIO_NET_CTRL_VLAN_ADD 0
|
|
#define VIRTIO_NET_CTRL_VLAN_DEL 1
|
|
|
|
#endif /* _LINUX_VIRTIO_NET_H */
|