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Vector Packet Processing
virtio.h
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1 /*
2  *------------------------------------------------------------------
3  * Copyright (c) 2017 Cisco and/or its affiliates.
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at:
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  *------------------------------------------------------------------
16  */
17 
18 #ifndef _VNET_DEVICES_VIRTIO_VIRTIO_H_
19 #define _VNET_DEVICES_VIRTIO_VIRTIO_H_
20 
21 #define foreach_virtio_net_features \
22  _ (VIRTIO_NET_F_CSUM, 0) /* Host handles pkts w/ partial csum */ \
23  _ (VIRTIO_NET_F_GUEST_CSUM, 1) /* Guest handles pkts w/ partial csum */ \
24  _ (VIRTIO_NET_F_CTRL_GUEST_OFFLOADS, 2) /* Dynamic offload configuration. */ \
25  _ (VIRTIO_NET_F_MTU, 3) /* Initial MTU advice. */ \
26  _ (VIRTIO_NET_F_MAC, 5) /* Host has given MAC address. */ \
27  _ (VIRTIO_NET_F_GSO, 6) /* Host handles pkts w/ any GSO. */ \
28  _ (VIRTIO_NET_F_GUEST_TSO4, 7) /* Guest can handle TSOv4 in. */ \
29  _ (VIRTIO_NET_F_GUEST_TSO6, 8) /* Guest can handle TSOv6 in. */ \
30  _ (VIRTIO_NET_F_GUEST_ECN, 9) /* Guest can handle TSO[6] w/ ECN in. */ \
31  _ (VIRTIO_NET_F_GUEST_UFO, 10) /* Guest can handle UFO in. */ \
32  _ (VIRTIO_NET_F_HOST_TSO4, 11) /* Host can handle TSOv4 in. */ \
33  _ (VIRTIO_NET_F_HOST_TSO6, 12) /* Host can handle TSOv6 in. */ \
34  _ (VIRTIO_NET_F_HOST_ECN, 13) /* Host can handle TSO[6] w/ ECN in. */ \
35  _ (VIRTIO_NET_F_HOST_UFO, 14) /* Host can handle UFO in. */ \
36  _ (VIRTIO_NET_F_MRG_RXBUF, 15) /* Host can merge receive buffers. */ \
37  _ (VIRTIO_NET_F_STATUS, 16) /* virtio_net_config.status available */ \
38  _ (VIRTIO_NET_F_CTRL_VQ, 17) /* Control channel available */ \
39  _ (VIRTIO_NET_F_CTRL_RX, 18) /* Control channel RX mode support */ \
40  _ (VIRTIO_NET_F_CTRL_VLAN, 19) /* Control channel VLAN filtering */ \
41  _ (VIRTIO_NET_F_CTRL_RX_EXTRA, 20) /* Extra RX mode control support */ \
42  _ (VIRTIO_NET_F_GUEST_ANNOUNCE, 21) /* Guest can announce device on the network */ \
43  _ (VIRTIO_NET_F_MQ, 22) /* Device supports Receive Flow Steering */ \
44  _ (VIRTIO_NET_F_CTRL_MAC_ADDR, 23) /* Set MAC address */ \
45  _ (VIRTIO_F_NOTIFY_ON_EMPTY, 24) \
46  _ (VHOST_F_LOG_ALL, 26) /* Log all write descriptors */ \
47  _ (VIRTIO_F_ANY_LAYOUT, 27) /* Can the device handle any descripor layout */ \
48  _ (VIRTIO_RING_F_INDIRECT_DESC, 28) /* Support indirect buffer descriptors */ \
49  _ (VIRTIO_RING_F_EVENT_IDX, 29) /* The Guest publishes the used index for which it expects an interrupt \
50  * at the end of the avail ring. Host should ignore the avail->flags field. */ \
51 /* The Host publishes the avail index for which it expects a kick \
52  * at the end of the used ring. Guest should ignore the used->flags field. */ \
53  _ (VHOST_USER_F_PROTOCOL_FEATURES, 30) \
54  _ (VIRTIO_F_VERSION_1, 32)
55 
56 #define foreach_virtio_if_flag \
57  _(0, ADMIN_UP, "admin-up") \
58  _(1, DELETING, "deleting")
59 
60 typedef enum
61 {
62 #define _(a, b, c) VIRTIO_IF_FLAG_##b = (1 << a),
64 #undef _
66 
67 typedef enum
68 {
72 
73 
74 typedef struct
75 {
76  struct vring_desc *desc;
77  struct vring_used *used;
78  struct vring_avail *avail;
81  int kick_fd;
82  int call_fd;
84 #define VIRTIO_RING_FLAG_MASK_INT 1
90 
91 typedef struct
92 {
95 
101  int fd;
102  int tap_fd;
104 
105  u64 features, remote_features;
106 
113  u8 host_mac_addr[6];
118 
119  int ifindex;
120 } virtio_if_t;
121 
122 typedef struct
123 {
125 } virtio_main_t;
126 
130 
132  u16 sz);
134  u32 idx);
135 extern void virtio_free_used_desc (vlib_main_t * vm, virtio_vring_t * vring);
136 
137 #endif /* _VNET_DEVICES_VIRTIO_VIRTIO_H_ */
138 
139 /*
140  * fd.io coding-style-patch-verification: ON
141  *
142  * Local Variables:
143  * eval: (c-set-style "gnu")
144  * End:
145  */
u32 per_interface_next_index
Definition: virtio.h:100
struct vring_used * used
Definition: virtio.h:77
virtio_if_t * interfaces
Definition: virtio.h:124
ip4_address_t host_ip4_addr
Definition: virtio.h:114
clib_error_t * virtio_vring_init(vlib_main_t *vm, virtio_if_t *vif, u16 idx, u16 sz)
Definition: virtio.c:63
u32 dev_instance
Definition: virtio.h:97
int kick_fd
Definition: virtio.h:81
clib_error_t * virtio_vring_free(vlib_main_t *vm, virtio_if_t *vif, u32 idx)
Definition: virtio.c:153
vnet_device_class_t virtio_device_class
struct _vlib_node_registration vlib_node_registration_t
struct _vnet_device_class vnet_device_class_t
int call_fd
Definition: virtio.h:82
virtio_vring_t * vrings
Definition: virtio.h:103
struct vring_avail * avail
Definition: virtio.h:78
u32 hw_if_index
Definition: virtio.h:98
u8 host_ip6_prefix_len
Definition: virtio.h:117
u8 * host_bridge
Definition: virtio.h:112
int ifindex
Definition: virtio.h:119
virtio_main_t virtio_main
Definition: virtio.c:35
unsigned long u64
Definition: types.h:89
u32 id
Definition: virtio.h:96
virtio_if_flag_t
Definition: virtio.h:60
int tap_fd
Definition: virtio.h:102
u16 tx_ring_sz
Definition: virtio.h:108
clib_spinlock_t lockp
Definition: virtio.h:94
u16 desc_next
Definition: virtio.h:80
u16 last_used_idx
Definition: virtio.h:88
vlib_main_t * vm
Definition: buffer.c:283
ip6_address_t host_ip6_addr
Definition: virtio.h:116
u32 call_file_index
Definition: virtio.h:86
u8 * net_ns
Definition: virtio.h:111
u32 flags
Definition: virtio.h:93
u16 rx_ring_sz
Definition: virtio.h:109
virtio_if_type_t type
Definition: virtio.h:107
unsigned int u32
Definition: types.h:88
u64 remote_features
Definition: virtio.h:105
void virtio_free_used_desc(vlib_main_t *vm, virtio_vring_t *vring)
Definition: device.c:92
vlib_node_registration_t virtio_input_node
(constructor) VLIB_REGISTER_NODE (virtio_input_node)
Definition: node.c:284
unsigned short u16
Definition: types.h:57
unsigned char u8
Definition: types.h:56
#define foreach_virtio_if_flag
Definition: virtio.h:56
int fd
Definition: virtio.h:101
u32 * buffers
Definition: virtio.h:87
u8 host_ip4_prefix_len
Definition: virtio.h:115
u32 sw_if_index
Definition: virtio.h:99
struct vring_desc * desc
Definition: virtio.h:76
virtio_if_type_t
Definition: virtio.h:67
u16 desc_in_use
Definition: virtio.h:79
u8 * host_if_name
Definition: virtio.h:110