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/*
* Copyright (c) 2015 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 __VIRTIO_STD_H__
#define __VIRTIO_STD_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 descriptor 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) /* v1.0 compliant. */ \
_ (VIRTIO_F_IOMMU_PLATFORM, 33) \
_ (VIRTIO_F_RING_PACKED, 34) \
_ (VIRTIO_F_IN_ORDER, 35) /* all buffers are used by the device in the */ \
/* same order in which they have been made available */ \
_ (VIRTIO_F_ORDER_PLATFORM, 36) /* memory accesses by the driver and the */ \
/* device are ordered in a way described by the platfor */ \
_ (VIRTIO_F_NOTIFICATION_DATA, 38) /* the driver passes extra data (besides */ \
/* identifying the virtqueue) in its device notifications. */ \
_ (VIRTIO_NET_F_SPEED_DUPLEX, 63) /* Device set linkspeed and duplex */
typedef enum
{
#define _(f,n) f = n,
foreach_virtio_net_features
#undef _
} vnet_virtio_net_feature_t;
#define VIRTIO_FEATURE(X) (1ULL << X)
#define VRING_MAX_SIZE 32768
#define VRING_DESC_F_NEXT 1
#define VRING_DESC_F_WRITE 2
#define VRING_DESC_F_INDIRECT 4
#define VRING_DESC_F_AVAIL (1 << 7)
#define VRING_DESC_F_USED (1 << 15)
#define foreach_virtio_event_idx_flags \
_ (VRING_EVENT_F_ENABLE, 0) \
_ (VRING_EVENT_F_DISABLE, 1) \
_ (VRING_EVENT_F_DESC, 2)
typedef enum
{
#define _(f,n) f = n,
foreach_virtio_event_idx_flags
#undef _
} vnet_virtio_event_idx_flags_t;
#define VRING_USED_F_NO_NOTIFY 1
#define VRING_AVAIL_F_NO_INTERRUPT 1
typedef struct
{
u64 addr;
u32 len;
u16 flags;
u16 next;
} vnet_virtio_vring_desc_t;
typedef struct
{
u16 flags;
u16 idx;
u16 ring[0];
/* u16 used_event; */
} vnet_virtio_vring_avail_t;
typedef struct
{
u32 id;
u32 len;
} vnet_virtio_vring_used_elem_t;
typedef struct
{
u16 flags;
u16 idx;
vnet_virtio_vring_used_elem_t ring[0];
/* u16 avail_event; */
} vnet_virtio_vring_used_t;
typedef CLIB_PACKED (struct {
u64 addr; // packet data buffer address
u32 len; // packet data buffer size
u16 id; // buffer id
u16 flags; // flags
}) vnet_virtio_vring_packed_desc_t;
STATIC_ASSERT_SIZEOF (vnet_virtio_vring_packed_desc_t, 16);
typedef CLIB_PACKED (struct {
u16 off_wrap;
u16 flags;
}) vnet_virtio_vring_desc_event_t;
#define VIRTIO_NET_HDR_F_NEEDS_CSUM 1 /* Use csum_start, csum_offset */
#define VIRTIO_NET_HDR_F_DATA_VALID 2 /* Csum is valid */
#define VIRTIO_NET_HDR_GSO_NONE 0 /* Not a GSO frame */
#define VIRTIO_NET_HDR_GSO_TCPV4 1 /* GSO frame, IPv4 TCP (TSO) */
#define VIRTIO_NET_HDR_GSO_UDP 3 /* GSO frame, IPv4 UDP (UFO) */
#define VIRTIO_NET_HDR_GSO_TCPV6 4 /* GSO frame, IPv6 TCP */
#define VIRTIO_NET_HDR_GSO_ECN 0x80 /* TCP has ECN set */
typedef CLIB_PACKED (struct {
u8 flags;
u8 gso_type;
u16 hdr_len; /* Ethernet + IP + tcp/udp hdrs */
u16 gso_size; /* Bytes to append to hdr_len per frame */
u16 csum_start; /* Position to start checksumming from */
u16 csum_offset; /* Offset after that to place checksum */
u16 num_buffers; /* Number of merged rx buffers */
}) vnet_virtio_net_hdr_v1_t;
typedef CLIB_PACKED (struct {
u8 flags;
u8 gso_type;
u16 hdr_len;
u16 gso_size;
u16 csum_start;
u16 csum_offset;
}) vnet_virtio_net_hdr_t;
typedef CLIB_PACKED (struct {
vnet_virtio_net_hdr_t hdr;
u16 num_buffers;
}) vnet_virtio_net_hdr_mrg_rxbuf_t;
#endif
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
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