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34 /* The feature bitmap for virtio net */
35 #define VIRTIO_NET_F_CSUM 0x00001 /* Host handles pkts w/ partial csum */
36 #define VIRTIO_NET_F_GUEST_CSUM 0x00002 /* Guest handles pkts w/ partial csum*/
37 #define VIRTIO_NET_F_MAC 0x00020 /* Host has given MAC address. */
38 #define VIRTIO_NET_F_GSO 0x00040 /* Host handles pkts w/ any GSO type */
39 #define VIRTIO_NET_F_GUEST_TSO4 0x00080 /* Guest can handle TSOv4 in. */
40 #define VIRTIO_NET_F_GUEST_TSO6 0x00100 /* Guest can handle TSOv6 in. */
41 #define VIRTIO_NET_F_GUEST_ECN 0x00200 /* Guest can handle TSO[6] w/ ECN in.*/
42 #define VIRTIO_NET_F_GUEST_UFO 0x00400 /* Guest can handle UFO in. */
43 #define VIRTIO_NET_F_HOST_TSO4 0x00800 /* Host can handle TSOv4 in. */
44 #define VIRTIO_NET_F_HOST_TSO6 0x01000 /* Host can handle TSOv6 in. */
45 #define VIRTIO_NET_F_HOST_ECN 0x02000 /* Host can handle TSO[6] w/ ECN in. */
46 #define VIRTIO_NET_F_HOST_UFO 0x04000 /* Host can handle UFO in. */
47 #define VIRTIO_NET_F_MRG_RXBUF 0x08000 /* Host can merge receive buffers. */
48 #define VIRTIO_NET_F_STATUS 0x10000 /* virtio_net_config.status available*/
49 #define VIRTIO_NET_F_CTRL_VQ 0x20000 /* Control channel available */
50 #define VIRTIO_NET_F_CTRL_RX 0x40000 /* Control channel RX mode support */
51 #define VIRTIO_NET_F_CTRL_VLAN 0x80000 /* Control channel VLAN filtering */
52 #define VIRTIO_NET_F_CTRL_RX_EXTRA 0x100000 /* Extra RX mode control support */
54 #define VIRTIO_NET_S_LINK_UP 1 /* Link is up */
56 struct virtio_net_config {
57 /* The config defining mac address (if VIRTIO_NET_F_MAC) */
58 uint8_t mac[ETHER_ADDR_LEN];
59 /* See VIRTIO_NET_F_STATUS and VIRTIO_NET_S_* above */
64 * This is the first element of the scatter-gather list. If you don't
65 * specify GSO or CSUM features, you can simply ignore the header.
67 struct virtio_net_hdr {
68 #define VIRTIO_NET_HDR_F_NEEDS_CSUM 1 /* Use csum_start,csum_offset*/
70 #define VIRTIO_NET_HDR_GSO_NONE 0 /* Not a GSO frame */
71 #define VIRTIO_NET_HDR_GSO_TCPV4 1 /* GSO frame, IPv4 TCP (TSO) */
72 #define VIRTIO_NET_HDR_GSO_UDP 3 /* GSO frame, IPv4 UDP (UFO) */
73 #define VIRTIO_NET_HDR_GSO_TCPV6 4 /* GSO frame, IPv6 TCP */
74 #define VIRTIO_NET_HDR_GSO_ECN 0x80 /* TCP has ECN set */
76 uint16_t hdr_len; /* Ethernet + IP + tcp/udp hdrs */
77 uint16_t gso_size; /* Bytes to append to hdr_len per frame */
78 uint16_t csum_start; /* Position to start checksumming from */
79 uint16_t csum_offset; /* Offset after that to place checksum */
83 * This is the version of the header to use when the MRG_RXBUF
84 * feature has been negotiated.
86 struct virtio_net_hdr_mrg_rxbuf {
87 struct virtio_net_hdr hdr;
88 uint16_t num_buffers; /* Number of merged rx buffers */
92 * Control virtqueue data structures
94 * The control virtqueue expects a header in the first sg entry
95 * and an ack/status response in the last entry. Data for the
96 * command goes in between.
98 struct virtio_net_ctrl_hdr {
103 typedef uint8_t virtio_net_ctrl_ack;
105 #define VIRTIO_NET_OK 0
106 #define VIRTIO_NET_ERR 1
109 * Control the RX mode, ie. promiscuous, allmulti, etc...
110 * All commands require an "out" sg entry containing a 1 byte
111 * state value, zero = disable, non-zero = enable. Commands
112 * 0 and 1 are supported with the VIRTIO_NET_F_CTRL_RX feature.
113 * Commands 2-5 are added with VIRTIO_NET_F_CTRL_RX_EXTRA.
115 #define VIRTIO_NET_CTRL_RX 0
116 #define VIRTIO_NET_CTRL_RX_PROMISC 0
117 #define VIRTIO_NET_CTRL_RX_ALLMULTI 1
118 #define VIRTIO_NET_CTRL_RX_ALLUNI 2
119 #define VIRTIO_NET_CTRL_RX_NOMULTI 3
120 #define VIRTIO_NET_CTRL_RX_NOUNI 4
121 #define VIRTIO_NET_CTRL_RX_NOBCAST 5
124 * Control the MAC filter table.
126 * The MAC filter table is managed by the hypervisor, the guest should
127 * assume the size is infinite. Filtering should be considered
128 * non-perfect, ie. based on hypervisor resources, the guest may
129 * received packets from sources not specified in the filter list.
131 * In addition to the class/cmd header, the TABLE_SET command requires
132 * two out scatterlists. Each contains a 4 byte count of entries followed
133 * by a concatenated byte stream of the ETH_ALEN MAC addresses. The
134 * first sg list contains unicast addresses, the second is for multicast.
135 * This functionality is present if the VIRTIO_NET_F_CTRL_RX feature
138 struct virtio_net_ctrl_mac {
140 uint8_t macs[][ETHER_ADDR_LEN];
143 #define VIRTIO_NET_CTRL_MAC 1
144 #define VIRTIO_NET_CTRL_MAC_TABLE_SET 0
147 * Control VLAN filtering
149 * The VLAN filter table is controlled via a simple ADD/DEL interface.
150 * VLAN IDs not added may be filtered by the hypervisor. Del is the
151 * opposite of add. Both commands expect an out entry containing a 2
152 * byte VLAN ID. VLAN filtering is available with the
153 * VIRTIO_NET_F_CTRL_VLAN feature bit.
155 #define VIRTIO_NET_CTRL_VLAN 2
156 #define VIRTIO_NET_CTRL_VLAN_ADD 0
157 #define VIRTIO_NET_CTRL_VLAN_DEL 1
159 #endif /* _VIRTIO_NET_H */