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https://github.com/arehnman/yttrium-virtio-gpu.git
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116 lines
4.0 KiB
C
116 lines
4.0 KiB
C
/**********************************************************************
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* Copyright (c) 2008 Red Hat, Inc.
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*
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* File: IONetDescriptor.h
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*
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* This file contains common guest/host definition, related
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* to VirtIO network adapter
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*
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* This work is licensed under the terms of the GNU GPL, version 2. See
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* the COPYING file in the top-level directory.
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*
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**********************************************************************/
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#ifndef IONETDESCRIPTOR_H
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#define IONETDESCRIPTOR_H
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#pragma pack (push)
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#pragma pack (1)
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/* This is the first element of the scatter-gather list. If you don't
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* specify GSO or CSUM features, you can simply ignore the header. */
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typedef struct _tagvirtio_net_hdr
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{
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#define VIRTIO_NET_HDR_F_NEEDS_CSUM 1 // Use csum_start, csum_offset
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u8 flags;
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#define VIRTIO_NET_HDR_GSO_NONE 0 // Not a GSO frame
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#define VIRTIO_NET_HDR_GSO_TCPV4 1 // GSO frame, IPv4 TCP (TSO)
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#define VIRTIO_NET_HDR_F_DATA_VALID 2 // Host checked checksum, no need to recheck
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#define VIRTIO_NET_HDR_GSO_UDP 3 // GSO frame, IPv4 UDP (UFO)
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#define VIRTIO_NET_HDR_GSO_TCPV6 4 // GSO frame, IPv6 TCP
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#define VIRTIO_NET_HDR_GSO_ECN 0x80 // TCP has ECN set
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u8 gso_type;
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u16 hdr_len; // Ethernet + IP + tcp/udp hdrs
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u16 gso_size; // Bytes to append to gso_hdr_len per frame
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u16 csum_start; // Position to start checksumming from
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u16 csum_offset; // Offset after that to place checksum
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}virtio_net_hdr_basic;
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typedef struct _tagvirtio_net_hdr_ext
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{
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virtio_net_hdr_basic BasicHeader;
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u16 nBuffers;
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}virtio_net_hdr_ext;
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/*
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* Control virtqueue data structures
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*
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* The control virtqueue expects a header in the first sg entry
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* and an ack/status response in the last entry. Data for the
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* command goes in between.
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*/
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typedef struct tag_virtio_net_ctrl_hdr {
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uint8_t class;
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uint8_t cmd;
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}virtio_net_ctrl_hdr;
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typedef uint8_t virtio_net_ctrl_ack;
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#define VIRTIO_NET_OK 0
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#define VIRTIO_NET_ERR 1
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/*
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* Control the RX mode, ie. promisucous, allmulti, etc...
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* All commands require an "out" sg entry containing a 1 byte
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* state value, zero = disable, non-zero = enable. Commands
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* 0 and 1 are supported with the VIRTIO_NET_F_CTRL_RX feature.
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* Commands 2-5 are added with VIRTIO_NET_F_CTRL_RX_EXTRA.
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*/
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#define VIRTIO_NET_CTRL_RX_MODE 0
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#define VIRTIO_NET_CTRL_RX_MODE_PROMISC 0
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#define VIRTIO_NET_CTRL_RX_MODE_ALLMULTI 1
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#define VIRTIO_NET_CTRL_RX_MODE_ALLUNI 2
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#define VIRTIO_NET_CTRL_RX_MODE_NOMULTI 3
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#define VIRTIO_NET_CTRL_RX_MODE_NOUNI 4
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#define VIRTIO_NET_CTRL_RX_MODE_NOBCAST 5
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/*
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* Control the MAC filter table.
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*
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* The MAC filter table is managed by the hypervisor, the guest should
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* assume the size is infinite. Filtering should be considered
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* non-perfect, ie. based on hypervisor resources, the guest may
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* received packets from sources not specified in the filter list.
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*
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* In addition to the class/cmd header, the TABLE_SET command requires
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* two out scatterlists. Each contains a 4 byte count of entries followed
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* by a concatenated byte stream of the ETH_ALEN MAC addresses. The
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* first sg list contains unicast addresses, the second is for multicast.
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* This functionality is present if the VIRTIO_NET_F_CTRL_RX feature
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* is available.
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*/
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#define ETH_ALEN 6
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struct virtio_net_ctrl_mac {
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uint32_t entries;
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uint8_t macs[][ETH_ALEN];
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};
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#define VIRTIO_NET_CTRL_MAC 1
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#define VIRTIO_NET_CTRL_MAC_TABLE_SET 0
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/*
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* Control VLAN filtering
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*
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* The VLAN filter table is controlled via a simple ADD/DEL interface.
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* VLAN IDs not added may be filterd by the hypervisor. Del is the
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* opposite of add. Both commands expect an out entry containing a 2
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* byte VLAN ID. VLAN filterting is available with the
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* VIRTIO_NET_F_CTRL_VLAN feature bit.
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*/
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#define VIRTIO_NET_CTRL_VLAN 2
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#define VIRTIO_NET_CTRL_VLAN_ADD 0
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#define VIRTIO_NET_CTRL_VLAN_DEL 1
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#pragma pack (pop)
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#endif
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