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Diffstat (limited to 'src/vnet/devices/virtio/virtio.h')
| -rw-r--r-- | src/vnet/devices/virtio/virtio.h | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/src/vnet/devices/virtio/virtio.h b/src/vnet/devices/virtio/virtio.h new file mode 100644 index 00000000000..7dcd90ac353 --- /dev/null +++ b/src/vnet/devices/virtio/virtio.h @@ -0,0 +1,131 @@ +/* + *------------------------------------------------------------------ + * Copyright (c) 2017 Cisco and/or its affiliates. + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at: + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + *------------------------------------------------------------------ + */ + +#ifndef _VNET_DEVICES_VIRTIO_VIRTIO_H_ +#define _VNET_DEVICES_VIRTIO_VIRTIO_H_ + +#define foreach_virtio_net_features \ + _ (VIRTIO_NET_F_CSUM, 0) /* Host handles pkts w/ partial csum */ \ + _ (VIRTIO_NET_F_GUEST_CSUM, 1) /* Guest handles pkts w/ partial csum */ \ + _ (VIRTIO_NET_F_CTRL_GUEST_OFFLOADS, 2) /* Dynamic offload configuration. */ \ + _ (VIRTIO_NET_F_MTU, 3) /* Initial MTU advice. */ \ + _ (VIRTIO_NET_F_MAC, 5) /* Host has given MAC address. */ \ + _ (VIRTIO_NET_F_GSO, 6) /* Host handles pkts w/ any GSO. */ \ + _ (VIRTIO_NET_F_GUEST_TSO4, 7) /* Guest can handle TSOv4 in. */ \ + _ (VIRTIO_NET_F_GUEST_TSO6, 8) /* Guest can handle TSOv6 in. */ \ + _ (VIRTIO_NET_F_GUEST_ECN, 9) /* Guest can handle TSO[6] w/ ECN in. */ \ + _ (VIRTIO_NET_F_GUEST_UFO, 10) /* Guest can handle UFO in. */ \ + _ (VIRTIO_NET_F_HOST_TSO4, 11) /* Host can handle TSOv4 in. */ \ + _ (VIRTIO_NET_F_HOST_TSO6, 12) /* Host can handle TSOv6 in. */ \ + _ (VIRTIO_NET_F_HOST_ECN, 13) /* Host can handle TSO[6] w/ ECN in. */ \ + _ (VIRTIO_NET_F_HOST_UFO, 14) /* Host can handle UFO in. */ \ + _ (VIRTIO_NET_F_MRG_RXBUF, 15) /* Host can merge receive buffers. */ \ + _ (VIRTIO_NET_F_STATUS, 16) /* virtio_net_config.status available */ \ + _ (VIRTIO_NET_F_CTRL_VQ, 17) /* Control channel available */ \ + _ (VIRTIO_NET_F_CTRL_RX, 18) /* Control channel RX mode support */ \ + _ (VIRTIO_NET_F_CTRL_VLAN, 19) /* Control channel VLAN filtering */ \ + _ (VIRTIO_NET_F_CTRL_RX_EXTRA, 20) /* Extra RX mode control support */ \ + _ (VIRTIO_NET_F_GUEST_ANNOUNCE, 21) /* Guest can announce device on the network */ \ + _ (VIRTIO_NET_F_MQ, 22) /* Device supports Receive Flow Steering */ \ + _ (VIRTIO_NET_F_CTRL_MAC_ADDR, 23) /* Set MAC address */ \ + _ (VIRTIO_F_NOTIFY_ON_EMPTY, 24) \ + _ (VHOST_F_LOG_ALL, 26) /* Log all write descriptors */ \ + _ (VIRTIO_F_ANY_LAYOUT, 27) /* Can the device handle any descripor layout */ \ + _ (VIRTIO_RING_F_INDIRECT_DESC, 28) /* Support indirect buffer descriptors */ \ + _ (VIRTIO_RING_F_EVENT_IDX, 29) /* The Guest publishes the used index for which it expects an interrupt \ + * at the end of the avail ring. Host should ignore the avail->flags field. */ \ +/* The Host publishes the avail index for which it expects a kick \ + * at the end of the used ring. Guest should ignore the used->flags field. */ \ + _ (VHOST_USER_F_PROTOCOL_FEATURES, 30) \ + _ (VIRTIO_F_VERSION_1, 32) + +#define foreach_virtio_if_flag \ + _(0, ADMIN_UP, "admin-up") \ + _(1, DELETING, "deleting") + +typedef enum +{ +#define _(a, b, c) VIRTIO_IF_FLAG_##b = (1 << a), + foreach_virtio_if_flag +#undef _ +} virtio_if_flag_t; + +typedef enum +{ + VIRTIO_IF_TYPE_TAP, + VIRTIO_IF_N_TYPES, +} virtio_if_type_t; + + +typedef struct +{ + struct vring_desc *desc; + struct vring_used *used; + struct vring_avail *avail; + u16 desc_in_use; + u16 desc_next; + int kick_fd; + int call_fd; + u16 size; +#define VIRTIO_RING_FLAG_MASK_INT 1 + u32 flags; + u32 call_file_index; + u32 *buffers; + u16 last_used_idx; +} virtio_vring_t; + +typedef struct +{ + u32 flags; + u32 dev_instance; + u32 hw_if_index; + u32 sw_if_index; + u32 per_interface_next_index; + int fd; + int tap_fd; + virtio_vring_t *vrings; + + u64 features, remote_features; + + virtio_if_type_t type; + u8 *name; + u8 *net_ns; + int ifindex; +} virtio_if_t; + +typedef struct +{ + virtio_if_t *interfaces; +} virtio_main_t; + +extern virtio_main_t virtio_main; +extern vnet_device_class_t virtio_device_class; +extern vlib_node_registration_t virtio_input_node; + +clib_error_t *virtio_vring_init (vlib_main_t * vm, virtio_if_t * vif, u16 idx, + u16 sz); +clib_error_t *virtio_vring_free (virtio_if_t * vif, u32 idx); + +#endif /* _VNET_DEVICES_VIRTIO_VIRTIO_H_ */ + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ |