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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 | ||
79674068 AL |
21 | #define ETH_ALEN 6 |
22 | ||
fbe78f4f AL |
23 | /* from Linux's virtio_net.h */ |
24 | ||
25 | /* The ID for virtio_net */ | |
26 | #define VIRTIO_ID_NET 1 | |
27 | ||
28 | /* The feature bitmap for virtio net */ | |
29 | #define VIRTIO_NET_F_CSUM 0 /* Host handles pkts w/ partial csum */ | |
30 | #define VIRTIO_NET_F_GUEST_CSUM 1 /* Guest handles pkts w/ partial csum */ | |
31 | #define VIRTIO_NET_F_MAC 5 /* Host has given MAC address. */ | |
32 | #define VIRTIO_NET_F_GSO 6 /* Host handles pkts w/ any GSO type */ | |
33 | #define VIRTIO_NET_F_GUEST_TSO4 7 /* Guest can handle TSOv4 in. */ | |
34 | #define VIRTIO_NET_F_GUEST_TSO6 8 /* Guest can handle TSOv6 in. */ | |
35 | #define VIRTIO_NET_F_GUEST_ECN 9 /* Guest can handle TSO[6] w/ ECN in. */ | |
36 | #define VIRTIO_NET_F_GUEST_UFO 10 /* Guest can handle UFO in. */ | |
37 | #define VIRTIO_NET_F_HOST_TSO4 11 /* Host can handle TSOv4 in. */ | |
38 | #define VIRTIO_NET_F_HOST_TSO6 12 /* Host can handle TSOv6 in. */ | |
39 | #define VIRTIO_NET_F_HOST_ECN 13 /* Host can handle TSO[6] w/ ECN in. */ | |
40 | #define VIRTIO_NET_F_HOST_UFO 14 /* Host can handle UFO in. */ | |
41 | #define VIRTIO_NET_F_MRG_RXBUF 15 /* Host can merge receive buffers. */ | |
554c97dd | 42 | #define VIRTIO_NET_F_STATUS 16 /* virtio_net_config.status available */ |
3d11d36c | 43 | #define VIRTIO_NET_F_CTRL_VQ 17 /* Control channel available */ |
002437cd | 44 | #define VIRTIO_NET_F_CTRL_RX 18 /* Control channel RX mode support */ |
554c97dd AL |
45 | |
46 | #define VIRTIO_NET_S_LINK_UP 1 /* Link is up */ | |
fbe78f4f AL |
47 | |
48 | #define TX_TIMER_INTERVAL 150000 /* 150 us */ | |
49 | ||
50 | /* Maximum packet size we can receive from tap device: header + 64k */ | |
51 | #define VIRTIO_NET_MAX_BUFSIZE (sizeof(struct virtio_net_hdr) + (64 << 10)) | |
52 | ||
fbe78f4f AL |
53 | struct virtio_net_config |
54 | { | |
554c97dd | 55 | /* The config defining mac address (6 bytes) */ |
fbe78f4f | 56 | uint8_t mac[6]; |
554c97dd AL |
57 | /* See VIRTIO_NET_F_STATUS and VIRTIO_NET_S_* above */ |
58 | uint16_t status; | |
fbe78f4f AL |
59 | } __attribute__((packed)); |
60 | ||
61 | /* This is the first element of the scatter-gather list. If you don't | |
62 | * specify GSO or CSUM features, you can simply ignore the header. */ | |
63 | struct virtio_net_hdr | |
64 | { | |
65 | #define VIRTIO_NET_HDR_F_NEEDS_CSUM 1 // Use csum_start, csum_offset | |
66 | uint8_t flags; | |
67 | #define VIRTIO_NET_HDR_GSO_NONE 0 // Not a GSO frame | |
68 | #define VIRTIO_NET_HDR_GSO_TCPV4 1 // GSO frame, IPv4 TCP (TSO) | |
69 | #define VIRTIO_NET_HDR_GSO_UDP 3 // GSO frame, IPv4 UDP (UFO) | |
70 | #define VIRTIO_NET_HDR_GSO_TCPV6 4 // GSO frame, IPv6 TCP | |
71 | #define VIRTIO_NET_HDR_GSO_ECN 0x80 // TCP has ECN set | |
72 | uint8_t gso_type; | |
73 | uint16_t hdr_len; | |
74 | uint16_t gso_size; | |
75 | uint16_t csum_start; | |
76 | uint16_t csum_offset; | |
77 | }; | |
78 | ||
79 | /* This is the version of the header to use when the MRG_RXBUF | |
80 | * feature has been negotiated. */ | |
81 | struct virtio_net_hdr_mrg_rxbuf | |
82 | { | |
83 | struct virtio_net_hdr hdr; | |
84 | uint16_t num_buffers; /* Number of merged rx buffers */ | |
85 | }; | |
86 | ||
291c6ff9 | 87 | void virtio_net_init(PCIBus *bus, NICInfo *nd, int devfn); |
fbe78f4f | 88 | |
3d11d36c AL |
89 | /* |
90 | * Control virtqueue data structures | |
91 | * | |
92 | * The control virtqueue expects a header in the first sg entry | |
93 | * and an ack/status response in the last entry. Data for the | |
94 | * command goes in between. | |
95 | */ | |
96 | struct virtio_net_ctrl_hdr { | |
97 | uint8_t class; | |
98 | uint8_t cmd; | |
99 | }; | |
100 | ||
101 | typedef uint8_t virtio_net_ctrl_ack; | |
102 | ||
103 | #define VIRTIO_NET_OK 0 | |
104 | #define VIRTIO_NET_ERR 1 | |
105 | ||
002437cd AL |
106 | /* |
107 | * Control the RX mode, ie. promisucous and allmulti. PROMISC and | |
108 | * ALLMULTI commands require an "out" sg entry containing a 1 byte | |
109 | * state value, zero = disable, non-zero = enable. These commands | |
110 | * are supported with the VIRTIO_NET_F_CTRL_RX feature. | |
111 | */ | |
112 | #define VIRTIO_NET_CTRL_RX_MODE 0 | |
113 | #define VIRTIO_NET_CTRL_RX_MODE_PROMISC 0 | |
114 | #define VIRTIO_NET_CTRL_RX_MODE_ALLMULTI 1 | |
115 | ||
b6503ed9 AL |
116 | /* |
117 | * Control the MAC filter table. | |
118 | * | |
119 | * The MAC filter table is managed by the hypervisor, the guest should | |
120 | * assume the size is infinite. Filtering should be considered | |
121 | * non-perfect, ie. based on hypervisor resources, the guest may | |
122 | * received packets from sources not specified in the filter list. | |
123 | * | |
124 | * In addition to the class/cmd header, the TABLE_SET command requires | |
125 | * two out scatterlists. Each contains a 4 byte count of entries followed | |
126 | * by a concatenated byte stream of the ETH_ALEN MAC addresses. The | |
127 | * first sg list contains unicast addresses, the second is for multicast. | |
128 | * This functionality is present if the VIRTIO_NET_F_CTRL_RX feature | |
129 | * is available. | |
130 | */ | |
131 | struct virtio_net_ctrl_mac { | |
132 | uint32_t entries; | |
133 | uint8_t macs[][ETH_ALEN]; | |
134 | }; | |
135 | #define VIRTIO_NET_CTRL_MAC 1 | |
136 | #define VIRTIO_NET_CTRL_MAC_TABLE_SET 0 | |
137 | ||
fbe78f4f | 138 | #endif |