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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 | fbe78f4f | aliguori | /* from Linux's virtio_net.h */
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22 | fbe78f4f | aliguori | |
23 | fbe78f4f | aliguori | /* The ID for virtio_net */
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24 | fbe78f4f | aliguori | #define VIRTIO_ID_NET 1 |
25 | fbe78f4f | aliguori | |
26 | fbe78f4f | aliguori | /* The feature bitmap for virtio net */
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27 | fbe78f4f | aliguori | #define VIRTIO_NET_F_CSUM 0 /* Host handles pkts w/ partial csum */ |
28 | fbe78f4f | aliguori | #define VIRTIO_NET_F_GUEST_CSUM 1 /* Guest handles pkts w/ partial csum */ |
29 | fbe78f4f | aliguori | #define VIRTIO_NET_F_MAC 5 /* Host has given MAC address. */ |
30 | fbe78f4f | aliguori | #define VIRTIO_NET_F_GSO 6 /* Host handles pkts w/ any GSO type */ |
31 | fbe78f4f | aliguori | #define VIRTIO_NET_F_GUEST_TSO4 7 /* Guest can handle TSOv4 in. */ |
32 | fbe78f4f | aliguori | #define VIRTIO_NET_F_GUEST_TSO6 8 /* Guest can handle TSOv6 in. */ |
33 | fbe78f4f | aliguori | #define VIRTIO_NET_F_GUEST_ECN 9 /* Guest can handle TSO[6] w/ ECN in. */ |
34 | fbe78f4f | aliguori | #define VIRTIO_NET_F_GUEST_UFO 10 /* Guest can handle UFO in. */ |
35 | fbe78f4f | aliguori | #define VIRTIO_NET_F_HOST_TSO4 11 /* Host can handle TSOv4 in. */ |
36 | fbe78f4f | aliguori | #define VIRTIO_NET_F_HOST_TSO6 12 /* Host can handle TSOv6 in. */ |
37 | fbe78f4f | aliguori | #define VIRTIO_NET_F_HOST_ECN 13 /* Host can handle TSO[6] w/ ECN in. */ |
38 | fbe78f4f | aliguori | #define VIRTIO_NET_F_HOST_UFO 14 /* Host can handle UFO in. */ |
39 | fbe78f4f | aliguori | #define VIRTIO_NET_F_MRG_RXBUF 15 /* Host can merge receive buffers. */ |
40 | fbe78f4f | aliguori | |
41 | fbe78f4f | aliguori | #define TX_TIMER_INTERVAL 150000 /* 150 us */ |
42 | fbe78f4f | aliguori | |
43 | fbe78f4f | aliguori | /* Maximum packet size we can receive from tap device: header + 64k */
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44 | fbe78f4f | aliguori | #define VIRTIO_NET_MAX_BUFSIZE (sizeof(struct virtio_net_hdr) + (64 << 10)) |
45 | fbe78f4f | aliguori | |
46 | fbe78f4f | aliguori | /* The config defining mac address (6 bytes) */
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47 | fbe78f4f | aliguori | struct virtio_net_config
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48 | fbe78f4f | aliguori | { |
49 | fbe78f4f | aliguori | uint8_t mac[6];
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50 | fbe78f4f | aliguori | } __attribute__((packed)); |
51 | fbe78f4f | aliguori | |
52 | fbe78f4f | aliguori | /* This is the first element of the scatter-gather list. If you don't
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53 | fbe78f4f | aliguori | * specify GSO or CSUM features, you can simply ignore the header. */
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54 | fbe78f4f | aliguori | struct virtio_net_hdr
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55 | fbe78f4f | aliguori | { |
56 | fbe78f4f | aliguori | #define VIRTIO_NET_HDR_F_NEEDS_CSUM 1 // Use csum_start, csum_offset |
57 | fbe78f4f | aliguori | uint8_t flags; |
58 | fbe78f4f | aliguori | #define VIRTIO_NET_HDR_GSO_NONE 0 // Not a GSO frame |
59 | fbe78f4f | aliguori | #define VIRTIO_NET_HDR_GSO_TCPV4 1 // GSO frame, IPv4 TCP (TSO) |
60 | fbe78f4f | aliguori | #define VIRTIO_NET_HDR_GSO_UDP 3 // GSO frame, IPv4 UDP (UFO) |
61 | fbe78f4f | aliguori | #define VIRTIO_NET_HDR_GSO_TCPV6 4 // GSO frame, IPv6 TCP |
62 | fbe78f4f | aliguori | #define VIRTIO_NET_HDR_GSO_ECN 0x80 // TCP has ECN set |
63 | fbe78f4f | aliguori | uint8_t gso_type; |
64 | fbe78f4f | aliguori | uint16_t hdr_len; |
65 | fbe78f4f | aliguori | uint16_t gso_size; |
66 | fbe78f4f | aliguori | uint16_t csum_start; |
67 | fbe78f4f | aliguori | uint16_t csum_offset; |
68 | fbe78f4f | aliguori | }; |
69 | fbe78f4f | aliguori | |
70 | fbe78f4f | aliguori | /* This is the version of the header to use when the MRG_RXBUF
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71 | fbe78f4f | aliguori | * feature has been negotiated. */
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72 | fbe78f4f | aliguori | struct virtio_net_hdr_mrg_rxbuf
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73 | fbe78f4f | aliguori | { |
74 | fbe78f4f | aliguori | struct virtio_net_hdr hdr;
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75 | fbe78f4f | aliguori | uint16_t num_buffers; /* Number of merged rx buffers */
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76 | fbe78f4f | aliguori | }; |
77 | fbe78f4f | aliguori | |
78 | fbe78f4f | aliguori | PCIDevice *virtio_net_init(PCIBus *bus, NICInfo *nd, int devfn);
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79 | fbe78f4f | aliguori | |
80 | fbe78f4f | aliguori | #endif |