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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" | |
a2cb15b0 | 18 | #include "pci/pci.h" |
fbe78f4f | 19 | |
79674068 AL |
20 | #define ETH_ALEN 6 |
21 | ||
fbe78f4f AL |
22 | /* from Linux's virtio_net.h */ |
23 | ||
24 | /* The ID for virtio_net */ | |
25 | #define VIRTIO_ID_NET 1 | |
26 | ||
27 | /* The feature bitmap for virtio net */ | |
28 | #define VIRTIO_NET_F_CSUM 0 /* Host handles pkts w/ partial csum */ | |
29 | #define VIRTIO_NET_F_GUEST_CSUM 1 /* Guest handles pkts w/ partial csum */ | |
30 | #define VIRTIO_NET_F_MAC 5 /* Host has given MAC address. */ | |
31 | #define VIRTIO_NET_F_GSO 6 /* Host handles pkts w/ any GSO type */ | |
32 | #define VIRTIO_NET_F_GUEST_TSO4 7 /* Guest can handle TSOv4 in. */ | |
33 | #define VIRTIO_NET_F_GUEST_TSO6 8 /* Guest can handle TSOv6 in. */ | |
34 | #define VIRTIO_NET_F_GUEST_ECN 9 /* Guest can handle TSO[6] w/ ECN in. */ | |
35 | #define VIRTIO_NET_F_GUEST_UFO 10 /* Guest can handle UFO in. */ | |
36 | #define VIRTIO_NET_F_HOST_TSO4 11 /* Host can handle TSOv4 in. */ | |
37 | #define VIRTIO_NET_F_HOST_TSO6 12 /* Host can handle TSOv6 in. */ | |
38 | #define VIRTIO_NET_F_HOST_ECN 13 /* Host can handle TSO[6] w/ ECN in. */ | |
39 | #define VIRTIO_NET_F_HOST_UFO 14 /* Host can handle UFO in. */ | |
40 | #define VIRTIO_NET_F_MRG_RXBUF 15 /* Host can merge receive buffers. */ | |
554c97dd | 41 | #define VIRTIO_NET_F_STATUS 16 /* virtio_net_config.status available */ |
3d11d36c | 42 | #define VIRTIO_NET_F_CTRL_VQ 17 /* Control channel available */ |
002437cd | 43 | #define VIRTIO_NET_F_CTRL_RX 18 /* Control channel RX mode support */ |
f21c0ed9 | 44 | #define VIRTIO_NET_F_CTRL_VLAN 19 /* Control channel VLAN filtering */ |
015cb166 | 45 | #define VIRTIO_NET_F_CTRL_RX_EXTRA 20 /* Extra RX mode control support */ |
554c97dd AL |
46 | |
47 | #define VIRTIO_NET_S_LINK_UP 1 /* Link is up */ | |
fbe78f4f AL |
48 | |
49 | #define TX_TIMER_INTERVAL 150000 /* 150 us */ | |
50 | ||
e3f30488 AW |
51 | /* Limit the number of packets that can be sent via a single flush |
52 | * of the TX queue. This gives us a guaranteed exit condition and | |
53 | * ensures fairness in the io path. 256 conveniently matches the | |
54 | * length of the TX queue and shows a good balance of performance | |
55 | * and latency. */ | |
56 | #define TX_BURST 256 | |
57 | ||
f0c07c7c AW |
58 | typedef struct virtio_net_conf |
59 | { | |
60 | uint32_t txtimer; | |
e3f30488 | 61 | int32_t txburst; |
a697a334 | 62 | char *tx; |
f0c07c7c AW |
63 | } virtio_net_conf; |
64 | ||
fbe78f4f AL |
65 | /* Maximum packet size we can receive from tap device: header + 64k */ |
66 | #define VIRTIO_NET_MAX_BUFSIZE (sizeof(struct virtio_net_hdr) + (64 << 10)) | |
67 | ||
fbe78f4f AL |
68 | struct virtio_net_config |
69 | { | |
ebbeb789 AK |
70 | /* The config defining mac address ($ETH_ALEN bytes) */ |
71 | uint8_t mac[ETH_ALEN]; | |
554c97dd AL |
72 | /* See VIRTIO_NET_F_STATUS and VIRTIO_NET_S_* above */ |
73 | uint16_t status; | |
541dc0d4 | 74 | } QEMU_PACKED; |
fbe78f4f | 75 | |
3d11d36c AL |
76 | /* |
77 | * Control virtqueue data structures | |
78 | * | |
79 | * The control virtqueue expects a header in the first sg entry | |
80 | * and an ack/status response in the last entry. Data for the | |
81 | * command goes in between. | |
82 | */ | |
83 | struct virtio_net_ctrl_hdr { | |
84 | uint8_t class; | |
85 | uint8_t cmd; | |
86 | }; | |
87 | ||
88 | typedef uint8_t virtio_net_ctrl_ack; | |
89 | ||
90 | #define VIRTIO_NET_OK 0 | |
91 | #define VIRTIO_NET_ERR 1 | |
92 | ||
002437cd | 93 | /* |
015cb166 AW |
94 | * Control the RX mode, ie. promisucous, allmulti, etc... |
95 | * All commands require an "out" sg entry containing a 1 byte | |
96 | * state value, zero = disable, non-zero = enable. Commands | |
97 | * 0 and 1 are supported with the VIRTIO_NET_F_CTRL_RX feature. | |
98 | * Commands 2-5 are added with VIRTIO_NET_F_CTRL_RX_EXTRA. | |
002437cd AL |
99 | */ |
100 | #define VIRTIO_NET_CTRL_RX_MODE 0 | |
101 | #define VIRTIO_NET_CTRL_RX_MODE_PROMISC 0 | |
102 | #define VIRTIO_NET_CTRL_RX_MODE_ALLMULTI 1 | |
015cb166 AW |
103 | #define VIRTIO_NET_CTRL_RX_MODE_ALLUNI 2 |
104 | #define VIRTIO_NET_CTRL_RX_MODE_NOMULTI 3 | |
105 | #define VIRTIO_NET_CTRL_RX_MODE_NOUNI 4 | |
106 | #define VIRTIO_NET_CTRL_RX_MODE_NOBCAST 5 | |
002437cd | 107 | |
b6503ed9 AL |
108 | /* |
109 | * Control the MAC filter table. | |
110 | * | |
111 | * The MAC filter table is managed by the hypervisor, the guest should | |
112 | * assume the size is infinite. Filtering should be considered | |
113 | * non-perfect, ie. based on hypervisor resources, the guest may | |
114 | * received packets from sources not specified in the filter list. | |
115 | * | |
116 | * In addition to the class/cmd header, the TABLE_SET command requires | |
117 | * two out scatterlists. Each contains a 4 byte count of entries followed | |
118 | * by a concatenated byte stream of the ETH_ALEN MAC addresses. The | |
119 | * first sg list contains unicast addresses, the second is for multicast. | |
120 | * This functionality is present if the VIRTIO_NET_F_CTRL_RX feature | |
121 | * is available. | |
122 | */ | |
123 | struct virtio_net_ctrl_mac { | |
124 | uint32_t entries; | |
125 | uint8_t macs[][ETH_ALEN]; | |
126 | }; | |
127 | #define VIRTIO_NET_CTRL_MAC 1 | |
128 | #define VIRTIO_NET_CTRL_MAC_TABLE_SET 0 | |
129 | ||
f21c0ed9 AL |
130 | /* |
131 | * Control VLAN filtering | |
132 | * | |
133 | * The VLAN filter table is controlled via a simple ADD/DEL interface. | |
134 | * VLAN IDs not added may be filterd by the hypervisor. Del is the | |
135 | * opposite of add. Both commands expect an out entry containing a 2 | |
136 | * byte VLAN ID. VLAN filterting is available with the | |
137 | * VIRTIO_NET_F_CTRL_VLAN feature bit. | |
138 | */ | |
139 | #define VIRTIO_NET_CTRL_VLAN 2 | |
140 | #define VIRTIO_NET_CTRL_VLAN_ADD 0 | |
141 | #define VIRTIO_NET_CTRL_VLAN_DEL 1 | |
142 | ||
8172539d MT |
143 | #define DEFINE_VIRTIO_NET_FEATURES(_state, _field) \ |
144 | DEFINE_VIRTIO_COMMON_FEATURES(_state, _field), \ | |
145 | DEFINE_PROP_BIT("csum", _state, _field, VIRTIO_NET_F_CSUM, true), \ | |
146 | DEFINE_PROP_BIT("guest_csum", _state, _field, VIRTIO_NET_F_GUEST_CSUM, true), \ | |
8172539d MT |
147 | DEFINE_PROP_BIT("gso", _state, _field, VIRTIO_NET_F_GSO, true), \ |
148 | DEFINE_PROP_BIT("guest_tso4", _state, _field, VIRTIO_NET_F_GUEST_TSO4, true), \ | |
149 | DEFINE_PROP_BIT("guest_tso6", _state, _field, VIRTIO_NET_F_GUEST_TSO6, true), \ | |
150 | DEFINE_PROP_BIT("guest_ecn", _state, _field, VIRTIO_NET_F_GUEST_ECN, true), \ | |
151 | DEFINE_PROP_BIT("guest_ufo", _state, _field, VIRTIO_NET_F_GUEST_UFO, true), \ | |
152 | DEFINE_PROP_BIT("host_tso4", _state, _field, VIRTIO_NET_F_HOST_TSO4, true), \ | |
153 | DEFINE_PROP_BIT("host_tso6", _state, _field, VIRTIO_NET_F_HOST_TSO6, true), \ | |
154 | DEFINE_PROP_BIT("host_ecn", _state, _field, VIRTIO_NET_F_HOST_ECN, true), \ | |
155 | DEFINE_PROP_BIT("host_ufo", _state, _field, VIRTIO_NET_F_HOST_UFO, true), \ | |
156 | DEFINE_PROP_BIT("mrg_rxbuf", _state, _field, VIRTIO_NET_F_MRG_RXBUF, true), \ | |
157 | DEFINE_PROP_BIT("status", _state, _field, VIRTIO_NET_F_STATUS, true), \ | |
158 | DEFINE_PROP_BIT("ctrl_vq", _state, _field, VIRTIO_NET_F_CTRL_VQ, true), \ | |
159 | DEFINE_PROP_BIT("ctrl_rx", _state, _field, VIRTIO_NET_F_CTRL_RX, true), \ | |
160 | DEFINE_PROP_BIT("ctrl_vlan", _state, _field, VIRTIO_NET_F_CTRL_VLAN, true), \ | |
161 | DEFINE_PROP_BIT("ctrl_rx_extra", _state, _field, VIRTIO_NET_F_CTRL_RX_EXTRA, true) | |
fbe78f4f | 162 | #endif |