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fbe78f4f AL |
1 | /* |
2 | * Virtio Network Device | |
3 | * | |
4 | * Copyright IBM, Corp. 2007 | |
5 | * | |
6 | * Authors: | |
7 | * Anthony Liguori <aliguori@us.ibm.com> | |
8 | * | |
9 | * This work is licensed under the terms of the GNU GPL, version 2. See | |
10 | * the COPYING file in the top-level directory. | |
11 | * | |
12 | */ | |
13 | ||
14 | #ifndef _QEMU_VIRTIO_NET_H | |
15 | #define _QEMU_VIRTIO_NET_H | |
16 | ||
17 | #include "virtio.h" | |
18 | #include "net.h" | |
19 | #include "pci.h" | |
20 | ||
21 | /* from Linux's virtio_net.h */ | |
22 | ||
23 | /* The ID for virtio_net */ | |
24 | #define VIRTIO_ID_NET 1 | |
25 | ||
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. */ | |
554c97dd AL |
40 | #define VIRTIO_NET_F_STATUS 16 /* virtio_net_config.status available */ |
41 | ||
42 | #define VIRTIO_NET_S_LINK_UP 1 /* Link is up */ | |
fbe78f4f AL |
43 | |
44 | #define TX_TIMER_INTERVAL 150000 /* 150 us */ | |
45 | ||
46 | /* Maximum packet size we can receive from tap device: header + 64k */ | |
47 | #define VIRTIO_NET_MAX_BUFSIZE (sizeof(struct virtio_net_hdr) + (64 << 10)) | |
48 | ||
fbe78f4f AL |
49 | struct virtio_net_config |
50 | { | |
554c97dd | 51 | /* The config defining mac address (6 bytes) */ |
fbe78f4f | 52 | uint8_t mac[6]; |
554c97dd AL |
53 | /* See VIRTIO_NET_F_STATUS and VIRTIO_NET_S_* above */ |
54 | uint16_t status; | |
fbe78f4f AL |
55 | } __attribute__((packed)); |
56 | ||
57 | /* This is the first element of the scatter-gather list. If you don't | |
58 | * specify GSO or CSUM features, you can simply ignore the header. */ | |
59 | struct virtio_net_hdr | |
60 | { | |
61 | #define VIRTIO_NET_HDR_F_NEEDS_CSUM 1 // Use csum_start, csum_offset | |
62 | uint8_t flags; | |
63 | #define VIRTIO_NET_HDR_GSO_NONE 0 // Not a GSO frame | |
64 | #define VIRTIO_NET_HDR_GSO_TCPV4 1 // GSO frame, IPv4 TCP (TSO) | |
65 | #define VIRTIO_NET_HDR_GSO_UDP 3 // GSO frame, IPv4 UDP (UFO) | |
66 | #define VIRTIO_NET_HDR_GSO_TCPV6 4 // GSO frame, IPv6 TCP | |
67 | #define VIRTIO_NET_HDR_GSO_ECN 0x80 // TCP has ECN set | |
68 | uint8_t gso_type; | |
69 | uint16_t hdr_len; | |
70 | uint16_t gso_size; | |
71 | uint16_t csum_start; | |
72 | uint16_t csum_offset; | |
73 | }; | |
74 | ||
75 | /* This is the version of the header to use when the MRG_RXBUF | |
76 | * feature has been negotiated. */ | |
77 | struct virtio_net_hdr_mrg_rxbuf | |
78 | { | |
79 | struct virtio_net_hdr hdr; | |
80 | uint16_t num_buffers; /* Number of merged rx buffers */ | |
81 | }; | |
82 | ||
83 | PCIDevice *virtio_net_init(PCIBus *bus, NICInfo *nd, int devfn); | |
84 | ||
85 | #endif |