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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 | 554c97dd | aliguori | |
47 | 554c97dd | aliguori | #define VIRTIO_NET_S_LINK_UP 1 /* Link is up */ |
48 | fbe78f4f | aliguori | |
49 | fbe78f4f | aliguori | #define TX_TIMER_INTERVAL 150000 /* 150 us */ |
50 | fbe78f4f | aliguori | |
51 | fbe78f4f | aliguori | /* Maximum packet size we can receive from tap device: header + 64k */
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52 | fbe78f4f | aliguori | #define VIRTIO_NET_MAX_BUFSIZE (sizeof(struct virtio_net_hdr) + (64 << 10)) |
53 | fbe78f4f | aliguori | |
54 | fbe78f4f | aliguori | struct virtio_net_config
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55 | fbe78f4f | aliguori | { |
56 | 554c97dd | aliguori | /* The config defining mac address (6 bytes) */
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57 | fbe78f4f | aliguori | uint8_t mac[6];
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58 | 554c97dd | aliguori | /* See VIRTIO_NET_F_STATUS and VIRTIO_NET_S_* above */
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59 | 554c97dd | aliguori | uint16_t status; |
60 | fbe78f4f | aliguori | } __attribute__((packed)); |
61 | fbe78f4f | aliguori | |
62 | fbe78f4f | aliguori | /* This is the first element of the scatter-gather list. If you don't
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63 | fbe78f4f | aliguori | * specify GSO or CSUM features, you can simply ignore the header. */
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64 | fbe78f4f | aliguori | struct virtio_net_hdr
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65 | fbe78f4f | aliguori | { |
66 | fbe78f4f | aliguori | #define VIRTIO_NET_HDR_F_NEEDS_CSUM 1 // Use csum_start, csum_offset |
67 | fbe78f4f | aliguori | uint8_t flags; |
68 | fbe78f4f | aliguori | #define VIRTIO_NET_HDR_GSO_NONE 0 // Not a GSO frame |
69 | fbe78f4f | aliguori | #define VIRTIO_NET_HDR_GSO_TCPV4 1 // GSO frame, IPv4 TCP (TSO) |
70 | fbe78f4f | aliguori | #define VIRTIO_NET_HDR_GSO_UDP 3 // GSO frame, IPv4 UDP (UFO) |
71 | fbe78f4f | aliguori | #define VIRTIO_NET_HDR_GSO_TCPV6 4 // GSO frame, IPv6 TCP |
72 | fbe78f4f | aliguori | #define VIRTIO_NET_HDR_GSO_ECN 0x80 // TCP has ECN set |
73 | fbe78f4f | aliguori | uint8_t gso_type; |
74 | fbe78f4f | aliguori | uint16_t hdr_len; |
75 | fbe78f4f | aliguori | uint16_t gso_size; |
76 | fbe78f4f | aliguori | uint16_t csum_start; |
77 | fbe78f4f | aliguori | uint16_t csum_offset; |
78 | fbe78f4f | aliguori | }; |
79 | fbe78f4f | aliguori | |
80 | fbe78f4f | aliguori | /* This is the version of the header to use when the MRG_RXBUF
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81 | fbe78f4f | aliguori | * feature has been negotiated. */
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82 | fbe78f4f | aliguori | struct virtio_net_hdr_mrg_rxbuf
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83 | fbe78f4f | aliguori | { |
84 | fbe78f4f | aliguori | struct virtio_net_hdr hdr;
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85 | fbe78f4f | aliguori | uint16_t num_buffers; /* Number of merged rx buffers */
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86 | fbe78f4f | aliguori | }; |
87 | fbe78f4f | aliguori | |
88 | 3d11d36c | aliguori | /*
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89 | 3d11d36c | aliguori | * Control virtqueue data structures
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90 | 3d11d36c | aliguori | *
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91 | 3d11d36c | aliguori | * The control virtqueue expects a header in the first sg entry
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92 | 3d11d36c | aliguori | * and an ack/status response in the last entry. Data for the
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93 | 3d11d36c | aliguori | * command goes in between.
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94 | 3d11d36c | aliguori | */
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95 | 3d11d36c | aliguori | struct virtio_net_ctrl_hdr {
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96 | 3d11d36c | aliguori | uint8_t class; |
97 | 3d11d36c | aliguori | uint8_t cmd; |
98 | 3d11d36c | aliguori | }; |
99 | 3d11d36c | aliguori | |
100 | 3d11d36c | aliguori | typedef uint8_t virtio_net_ctrl_ack;
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101 | 3d11d36c | aliguori | |
102 | 3d11d36c | aliguori | #define VIRTIO_NET_OK 0 |
103 | 3d11d36c | aliguori | #define VIRTIO_NET_ERR 1 |
104 | 3d11d36c | aliguori | |
105 | 002437cd | aliguori | /*
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106 | 002437cd | aliguori | * Control the RX mode, ie. promisucous and allmulti. PROMISC and
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107 | 002437cd | aliguori | * ALLMULTI commands require an "out" sg entry containing a 1 byte
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108 | 002437cd | aliguori | * state value, zero = disable, non-zero = enable. These commands
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109 | 002437cd | aliguori | * are supported with the VIRTIO_NET_F_CTRL_RX feature.
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110 | 002437cd | aliguori | */
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111 | 002437cd | aliguori | #define VIRTIO_NET_CTRL_RX_MODE 0 |
112 | 002437cd | aliguori | #define VIRTIO_NET_CTRL_RX_MODE_PROMISC 0 |
113 | 002437cd | aliguori | #define VIRTIO_NET_CTRL_RX_MODE_ALLMULTI 1 |
114 | 002437cd | aliguori | |
115 | b6503ed9 | aliguori | /*
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116 | b6503ed9 | aliguori | * Control the MAC filter table.
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117 | b6503ed9 | aliguori | *
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118 | b6503ed9 | aliguori | * The MAC filter table is managed by the hypervisor, the guest should
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119 | b6503ed9 | aliguori | * assume the size is infinite. Filtering should be considered
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120 | b6503ed9 | aliguori | * non-perfect, ie. based on hypervisor resources, the guest may
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121 | b6503ed9 | aliguori | * received packets from sources not specified in the filter list.
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122 | b6503ed9 | aliguori | *
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123 | b6503ed9 | aliguori | * In addition to the class/cmd header, the TABLE_SET command requires
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124 | b6503ed9 | aliguori | * two out scatterlists. Each contains a 4 byte count of entries followed
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125 | b6503ed9 | aliguori | * by a concatenated byte stream of the ETH_ALEN MAC addresses. The
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126 | b6503ed9 | aliguori | * first sg list contains unicast addresses, the second is for multicast.
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127 | b6503ed9 | aliguori | * This functionality is present if the VIRTIO_NET_F_CTRL_RX feature
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128 | b6503ed9 | aliguori | * is available.
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129 | b6503ed9 | aliguori | */
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130 | b6503ed9 | aliguori | struct virtio_net_ctrl_mac {
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131 | b6503ed9 | aliguori | uint32_t entries; |
132 | b6503ed9 | aliguori | uint8_t macs[][ETH_ALEN]; |
133 | b6503ed9 | aliguori | }; |
134 | b6503ed9 | aliguori | #define VIRTIO_NET_CTRL_MAC 1 |
135 | b6503ed9 | aliguori | #define VIRTIO_NET_CTRL_MAC_TABLE_SET 0 |
136 | b6503ed9 | aliguori | |
137 | f21c0ed9 | aliguori | /*
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138 | f21c0ed9 | aliguori | * Control VLAN filtering
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139 | f21c0ed9 | aliguori | *
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140 | f21c0ed9 | aliguori | * The VLAN filter table is controlled via a simple ADD/DEL interface.
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141 | f21c0ed9 | aliguori | * VLAN IDs not added may be filterd by the hypervisor. Del is the
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142 | f21c0ed9 | aliguori | * opposite of add. Both commands expect an out entry containing a 2
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143 | f21c0ed9 | aliguori | * byte VLAN ID. VLAN filterting is available with the
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144 | f21c0ed9 | aliguori | * VIRTIO_NET_F_CTRL_VLAN feature bit.
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145 | f21c0ed9 | aliguori | */
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146 | f21c0ed9 | aliguori | #define VIRTIO_NET_CTRL_VLAN 2 |
147 | f21c0ed9 | aliguori | #define VIRTIO_NET_CTRL_VLAN_ADD 0 |
148 | f21c0ed9 | aliguori | #define VIRTIO_NET_CTRL_VLAN_DEL 1 |
149 | f21c0ed9 | aliguori | |
150 | fbe78f4f | aliguori | #endif |