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1 | fbe78f4f | aliguori | /*
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2 | fbe78f4f | aliguori | * Virtio Network Device
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3 | fbe78f4f | aliguori | *
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4 | fbe78f4f | aliguori | * Copyright IBM, Corp. 2007
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5 | fbe78f4f | aliguori | *
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6 | fbe78f4f | aliguori | * Authors:
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7 | fbe78f4f | aliguori | * Anthony Liguori <aliguori@us.ibm.com>
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8 | fbe78f4f | aliguori | *
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9 | fbe78f4f | aliguori | * This work is licensed under the terms of the GNU GPL, version 2. See
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10 | fbe78f4f | aliguori | * the COPYING file in the top-level directory.
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11 | fbe78f4f | aliguori | *
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12 | fbe78f4f | aliguori | */
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13 | fbe78f4f | aliguori | |
14 | fbe78f4f | aliguori | #ifndef _QEMU_VIRTIO_NET_H
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15 | fbe78f4f | aliguori | #define _QEMU_VIRTIO_NET_H
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16 | fbe78f4f | aliguori | |
17 | fbe78f4f | aliguori | #include "virtio.h" |
18 | fbe78f4f | aliguori | #include "net.h" |
19 | fbe78f4f | aliguori | #include "pci.h" |
20 | fbe78f4f | aliguori | |
21 | 79674068 | aliguori | #define ETH_ALEN 6 |
22 | 79674068 | aliguori | |
23 | fbe78f4f | aliguori | /* from Linux's virtio_net.h */
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24 | fbe78f4f | aliguori | |
25 | fbe78f4f | aliguori | /* The ID for virtio_net */
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26 | fbe78f4f | aliguori | #define VIRTIO_ID_NET 1 |
27 | fbe78f4f | aliguori | |
28 | fbe78f4f | aliguori | /* The feature bitmap for virtio net */
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29 | fbe78f4f | aliguori | #define VIRTIO_NET_F_CSUM 0 /* Host handles pkts w/ partial csum */ |
30 | fbe78f4f | aliguori | #define VIRTIO_NET_F_GUEST_CSUM 1 /* Guest handles pkts w/ partial csum */ |
31 | fbe78f4f | aliguori | #define VIRTIO_NET_F_MAC 5 /* Host has given MAC address. */ |
32 | fbe78f4f | aliguori | #define VIRTIO_NET_F_GSO 6 /* Host handles pkts w/ any GSO type */ |
33 | fbe78f4f | aliguori | #define VIRTIO_NET_F_GUEST_TSO4 7 /* Guest can handle TSOv4 in. */ |
34 | fbe78f4f | aliguori | #define VIRTIO_NET_F_GUEST_TSO6 8 /* Guest can handle TSOv6 in. */ |
35 | fbe78f4f | aliguori | #define VIRTIO_NET_F_GUEST_ECN 9 /* Guest can handle TSO[6] w/ ECN in. */ |
36 | fbe78f4f | aliguori | #define VIRTIO_NET_F_GUEST_UFO 10 /* Guest can handle UFO in. */ |
37 | fbe78f4f | aliguori | #define VIRTIO_NET_F_HOST_TSO4 11 /* Host can handle TSOv4 in. */ |
38 | fbe78f4f | aliguori | #define VIRTIO_NET_F_HOST_TSO6 12 /* Host can handle TSOv6 in. */ |
39 | fbe78f4f | aliguori | #define VIRTIO_NET_F_HOST_ECN 13 /* Host can handle TSO[6] w/ ECN in. */ |
40 | fbe78f4f | aliguori | #define VIRTIO_NET_F_HOST_UFO 14 /* Host can handle UFO in. */ |
41 | fbe78f4f | aliguori | #define VIRTIO_NET_F_MRG_RXBUF 15 /* Host can merge receive buffers. */ |
42 | 554c97dd | aliguori | #define VIRTIO_NET_F_STATUS 16 /* virtio_net_config.status available */ |
43 | 3d11d36c | aliguori | #define VIRTIO_NET_F_CTRL_VQ 17 /* Control channel available */ |
44 | 002437cd | aliguori | #define VIRTIO_NET_F_CTRL_RX 18 /* Control channel RX mode support */ |
45 | f21c0ed9 | aliguori | #define VIRTIO_NET_F_CTRL_VLAN 19 /* Control channel VLAN filtering */ |
46 | 015cb166 | Alex Williamson | #define VIRTIO_NET_F_CTRL_RX_EXTRA 20 /* Extra RX mode control support */ |
47 | 554c97dd | aliguori | |
48 | 554c97dd | aliguori | #define VIRTIO_NET_S_LINK_UP 1 /* Link is up */ |
49 | fbe78f4f | aliguori | |
50 | fbe78f4f | aliguori | #define TX_TIMER_INTERVAL 150000 /* 150 us */ |
51 | fbe78f4f | aliguori | |
52 | e3f30488 | Alex Williamson | /* Limit the number of packets that can be sent via a single flush
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53 | e3f30488 | Alex Williamson | * of the TX queue. This gives us a guaranteed exit condition and
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54 | e3f30488 | Alex Williamson | * ensures fairness in the io path. 256 conveniently matches the
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55 | e3f30488 | Alex Williamson | * length of the TX queue and shows a good balance of performance
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56 | e3f30488 | Alex Williamson | * and latency. */
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57 | e3f30488 | Alex Williamson | #define TX_BURST 256 |
58 | e3f30488 | Alex Williamson | |
59 | f0c07c7c | Alex Williamson | typedef struct virtio_net_conf |
60 | f0c07c7c | Alex Williamson | { |
61 | f0c07c7c | Alex Williamson | uint32_t txtimer; |
62 | e3f30488 | Alex Williamson | int32_t txburst; |
63 | a697a334 | Alex Williamson | char *tx;
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64 | f0c07c7c | Alex Williamson | } virtio_net_conf; |
65 | f0c07c7c | Alex Williamson | |
66 | fbe78f4f | aliguori | /* Maximum packet size we can receive from tap device: header + 64k */
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67 | fbe78f4f | aliguori | #define VIRTIO_NET_MAX_BUFSIZE (sizeof(struct virtio_net_hdr) + (64 << 10)) |
68 | fbe78f4f | aliguori | |
69 | fbe78f4f | aliguori | struct virtio_net_config
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70 | fbe78f4f | aliguori | { |
71 | ebbeb789 | Amos Kong | /* The config defining mac address ($ETH_ALEN bytes) */
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72 | ebbeb789 | Amos Kong | uint8_t mac[ETH_ALEN]; |
73 | 554c97dd | aliguori | /* See VIRTIO_NET_F_STATUS and VIRTIO_NET_S_* above */
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74 | 554c97dd | aliguori | uint16_t status; |
75 | 541dc0d4 | Stefan Weil | } QEMU_PACKED; |
76 | fbe78f4f | aliguori | |
77 | fbe78f4f | aliguori | /* This is the first element of the scatter-gather list. If you don't
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78 | fbe78f4f | aliguori | * specify GSO or CSUM features, you can simply ignore the header. */
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79 | fbe78f4f | aliguori | struct virtio_net_hdr
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80 | fbe78f4f | aliguori | { |
81 | fbe78f4f | aliguori | #define VIRTIO_NET_HDR_F_NEEDS_CSUM 1 // Use csum_start, csum_offset |
82 | ca384784 | Michael S. Tsirkin | #define VIRTIO_NET_HDR_F_DATA_VALID 2 // Csum is valid |
83 | fbe78f4f | aliguori | uint8_t flags; |
84 | fbe78f4f | aliguori | #define VIRTIO_NET_HDR_GSO_NONE 0 // Not a GSO frame |
85 | fbe78f4f | aliguori | #define VIRTIO_NET_HDR_GSO_TCPV4 1 // GSO frame, IPv4 TCP (TSO) |
86 | fbe78f4f | aliguori | #define VIRTIO_NET_HDR_GSO_UDP 3 // GSO frame, IPv4 UDP (UFO) |
87 | fbe78f4f | aliguori | #define VIRTIO_NET_HDR_GSO_TCPV6 4 // GSO frame, IPv6 TCP |
88 | fbe78f4f | aliguori | #define VIRTIO_NET_HDR_GSO_ECN 0x80 // TCP has ECN set |
89 | fbe78f4f | aliguori | uint8_t gso_type; |
90 | fbe78f4f | aliguori | uint16_t hdr_len; |
91 | fbe78f4f | aliguori | uint16_t gso_size; |
92 | fbe78f4f | aliguori | uint16_t csum_start; |
93 | fbe78f4f | aliguori | uint16_t csum_offset; |
94 | fbe78f4f | aliguori | }; |
95 | fbe78f4f | aliguori | |
96 | fbe78f4f | aliguori | /* This is the version of the header to use when the MRG_RXBUF
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97 | fbe78f4f | aliguori | * feature has been negotiated. */
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98 | fbe78f4f | aliguori | struct virtio_net_hdr_mrg_rxbuf
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99 | fbe78f4f | aliguori | { |
100 | fbe78f4f | aliguori | struct virtio_net_hdr hdr;
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101 | fbe78f4f | aliguori | uint16_t num_buffers; /* Number of merged rx buffers */
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102 | fbe78f4f | aliguori | }; |
103 | fbe78f4f | aliguori | |
104 | 3d11d36c | aliguori | /*
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105 | 3d11d36c | aliguori | * Control virtqueue data structures
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106 | 3d11d36c | aliguori | *
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107 | 3d11d36c | aliguori | * The control virtqueue expects a header in the first sg entry
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108 | 3d11d36c | aliguori | * and an ack/status response in the last entry. Data for the
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109 | 3d11d36c | aliguori | * command goes in between.
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110 | 3d11d36c | aliguori | */
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111 | 3d11d36c | aliguori | struct virtio_net_ctrl_hdr {
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112 | 3d11d36c | aliguori | uint8_t class; |
113 | 3d11d36c | aliguori | uint8_t cmd; |
114 | 3d11d36c | aliguori | }; |
115 | 3d11d36c | aliguori | |
116 | 3d11d36c | aliguori | typedef uint8_t virtio_net_ctrl_ack;
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117 | 3d11d36c | aliguori | |
118 | 3d11d36c | aliguori | #define VIRTIO_NET_OK 0 |
119 | 3d11d36c | aliguori | #define VIRTIO_NET_ERR 1 |
120 | 3d11d36c | aliguori | |
121 | 002437cd | aliguori | /*
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122 | 015cb166 | Alex Williamson | * Control the RX mode, ie. promisucous, allmulti, etc...
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123 | 015cb166 | Alex Williamson | * All commands require an "out" sg entry containing a 1 byte
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124 | 015cb166 | Alex Williamson | * state value, zero = disable, non-zero = enable. Commands
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125 | 015cb166 | Alex Williamson | * 0 and 1 are supported with the VIRTIO_NET_F_CTRL_RX feature.
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126 | 015cb166 | Alex Williamson | * Commands 2-5 are added with VIRTIO_NET_F_CTRL_RX_EXTRA.
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127 | 002437cd | aliguori | */
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128 | 002437cd | aliguori | #define VIRTIO_NET_CTRL_RX_MODE 0 |
129 | 002437cd | aliguori | #define VIRTIO_NET_CTRL_RX_MODE_PROMISC 0 |
130 | 002437cd | aliguori | #define VIRTIO_NET_CTRL_RX_MODE_ALLMULTI 1 |
131 | 015cb166 | Alex Williamson | #define VIRTIO_NET_CTRL_RX_MODE_ALLUNI 2 |
132 | 015cb166 | Alex Williamson | #define VIRTIO_NET_CTRL_RX_MODE_NOMULTI 3 |
133 | 015cb166 | Alex Williamson | #define VIRTIO_NET_CTRL_RX_MODE_NOUNI 4 |
134 | 015cb166 | Alex Williamson | #define VIRTIO_NET_CTRL_RX_MODE_NOBCAST 5 |
135 | 002437cd | aliguori | |
136 | b6503ed9 | aliguori | /*
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137 | b6503ed9 | aliguori | * Control the MAC filter table.
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138 | b6503ed9 | aliguori | *
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139 | b6503ed9 | aliguori | * The MAC filter table is managed by the hypervisor, the guest should
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140 | b6503ed9 | aliguori | * assume the size is infinite. Filtering should be considered
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141 | b6503ed9 | aliguori | * non-perfect, ie. based on hypervisor resources, the guest may
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142 | b6503ed9 | aliguori | * received packets from sources not specified in the filter list.
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143 | b6503ed9 | aliguori | *
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144 | b6503ed9 | aliguori | * In addition to the class/cmd header, the TABLE_SET command requires
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145 | b6503ed9 | aliguori | * two out scatterlists. Each contains a 4 byte count of entries followed
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146 | b6503ed9 | aliguori | * by a concatenated byte stream of the ETH_ALEN MAC addresses. The
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147 | b6503ed9 | aliguori | * first sg list contains unicast addresses, the second is for multicast.
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148 | b6503ed9 | aliguori | * This functionality is present if the VIRTIO_NET_F_CTRL_RX feature
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149 | b6503ed9 | aliguori | * is available.
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150 | b6503ed9 | aliguori | */
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151 | b6503ed9 | aliguori | struct virtio_net_ctrl_mac {
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152 | b6503ed9 | aliguori | uint32_t entries; |
153 | b6503ed9 | aliguori | uint8_t macs[][ETH_ALEN]; |
154 | b6503ed9 | aliguori | }; |
155 | b6503ed9 | aliguori | #define VIRTIO_NET_CTRL_MAC 1 |
156 | b6503ed9 | aliguori | #define VIRTIO_NET_CTRL_MAC_TABLE_SET 0 |
157 | b6503ed9 | aliguori | |
158 | f21c0ed9 | aliguori | /*
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159 | f21c0ed9 | aliguori | * Control VLAN filtering
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160 | f21c0ed9 | aliguori | *
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161 | f21c0ed9 | aliguori | * The VLAN filter table is controlled via a simple ADD/DEL interface.
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162 | f21c0ed9 | aliguori | * VLAN IDs not added may be filterd by the hypervisor. Del is the
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163 | f21c0ed9 | aliguori | * opposite of add. Both commands expect an out entry containing a 2
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164 | f21c0ed9 | aliguori | * byte VLAN ID. VLAN filterting is available with the
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165 | f21c0ed9 | aliguori | * VIRTIO_NET_F_CTRL_VLAN feature bit.
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166 | f21c0ed9 | aliguori | */
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167 | f21c0ed9 | aliguori | #define VIRTIO_NET_CTRL_VLAN 2 |
168 | f21c0ed9 | aliguori | #define VIRTIO_NET_CTRL_VLAN_ADD 0 |
169 | f21c0ed9 | aliguori | #define VIRTIO_NET_CTRL_VLAN_DEL 1 |
170 | f21c0ed9 | aliguori | |
171 | 8172539d | Michael S. Tsirkin | #define DEFINE_VIRTIO_NET_FEATURES(_state, _field) \
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172 | 8172539d | Michael S. Tsirkin | DEFINE_VIRTIO_COMMON_FEATURES(_state, _field), \ |
173 | 8172539d | Michael S. Tsirkin | DEFINE_PROP_BIT("csum", _state, _field, VIRTIO_NET_F_CSUM, true), \ |
174 | 8172539d | Michael S. Tsirkin | DEFINE_PROP_BIT("guest_csum", _state, _field, VIRTIO_NET_F_GUEST_CSUM, true), \ |
175 | 8172539d | Michael S. Tsirkin | DEFINE_PROP_BIT("gso", _state, _field, VIRTIO_NET_F_GSO, true), \ |
176 | 8172539d | Michael S. Tsirkin | DEFINE_PROP_BIT("guest_tso4", _state, _field, VIRTIO_NET_F_GUEST_TSO4, true), \ |
177 | 8172539d | Michael S. Tsirkin | DEFINE_PROP_BIT("guest_tso6", _state, _field, VIRTIO_NET_F_GUEST_TSO6, true), \ |
178 | 8172539d | Michael S. Tsirkin | DEFINE_PROP_BIT("guest_ecn", _state, _field, VIRTIO_NET_F_GUEST_ECN, true), \ |
179 | 8172539d | Michael S. Tsirkin | DEFINE_PROP_BIT("guest_ufo", _state, _field, VIRTIO_NET_F_GUEST_UFO, true), \ |
180 | 8172539d | Michael S. Tsirkin | DEFINE_PROP_BIT("host_tso4", _state, _field, VIRTIO_NET_F_HOST_TSO4, true), \ |
181 | 8172539d | Michael S. Tsirkin | DEFINE_PROP_BIT("host_tso6", _state, _field, VIRTIO_NET_F_HOST_TSO6, true), \ |
182 | 8172539d | Michael S. Tsirkin | DEFINE_PROP_BIT("host_ecn", _state, _field, VIRTIO_NET_F_HOST_ECN, true), \ |
183 | 8172539d | Michael S. Tsirkin | DEFINE_PROP_BIT("host_ufo", _state, _field, VIRTIO_NET_F_HOST_UFO, true), \ |
184 | 8172539d | Michael S. Tsirkin | DEFINE_PROP_BIT("mrg_rxbuf", _state, _field, VIRTIO_NET_F_MRG_RXBUF, true), \ |
185 | 8172539d | Michael S. Tsirkin | DEFINE_PROP_BIT("status", _state, _field, VIRTIO_NET_F_STATUS, true), \ |
186 | 8172539d | Michael S. Tsirkin | DEFINE_PROP_BIT("ctrl_vq", _state, _field, VIRTIO_NET_F_CTRL_VQ, true), \ |
187 | 8172539d | Michael S. Tsirkin | DEFINE_PROP_BIT("ctrl_rx", _state, _field, VIRTIO_NET_F_CTRL_RX, true), \ |
188 | 8172539d | Michael S. Tsirkin | DEFINE_PROP_BIT("ctrl_vlan", _state, _field, VIRTIO_NET_F_CTRL_VLAN, true), \ |
189 | 8172539d | Michael S. Tsirkin | DEFINE_PROP_BIT("ctrl_rx_extra", _state, _field, VIRTIO_NET_F_CTRL_RX_EXTRA, true) |
190 | fbe78f4f | aliguori | #endif |