359 lines
14 KiB
C
359 lines
14 KiB
C
|
#ifndef _LINUX_VIRTIO_NET_H
|
||
|
|
#define _LINUX_VIRTIO_NET_H
|
||
|
|
/* This header is BSD licensed so anyone can use the definitions to implement
|
||
|
|
* compatible drivers/servers.
|
||
|
|
*
|
||
|
|
* Redistribution and use in source and binary forms, with or without
|
||
|
|
* modification, are permitted provided that the following conditions
|
||
|
|
* are met:
|
||
|
|
* 1. Redistributions of source code must retain the above copyright
|
||
|
|
* notice, this list of conditions and the following disclaimer.
|
||
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
||
|
|
* notice, this list of conditions and the following disclaimer in the
|
||
|
|
* documentation and/or other materials provided with the distribution.
|
||
|
|
* 3. Neither the name of IBM nor the names of its contributors
|
||
|
|
* may be used to endorse or promote products derived from this software
|
||
|
|
* without specific prior written permission.
|
||
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS'' AND
|
||
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL IBM OR CONTRIBUTORS BE LIABLE
|
||
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||
|
|
* SUCH DAMAGE. */
|
||
|
|
#include "standard-headers/linux/types.h"
|
||
|
|
#include "standard-headers/linux/virtio_ids.h"
|
||
|
|
#include "standard-headers/linux/virtio_config.h"
|
||
|
|
#include "standard-headers/linux/virtio_types.h"
|
||
|
|
#include "standard-headers/linux/if_ether.h"
|
||
|
|
|
||
|
|
/* The feature bitmap for virtio net */
|
||
|
|
#define VIRTIO_NET_F_CSUM 0 /* Host handles pkts w/ partial csum */
|
||
|
|
#define VIRTIO_NET_F_GUEST_CSUM 1 /* Guest handles pkts w/ partial csum */
|
||
|
|
#define VIRTIO_NET_F_CTRL_GUEST_OFFLOADS 2 /* Dynamic offload configuration. */
|
||
|
|
#define VIRTIO_NET_F_MTU 3 /* Initial MTU advice */
|
||
|
|
#define VIRTIO_NET_F_MAC 5 /* Host has given MAC address. */
|
||
|
|
#define VIRTIO_NET_F_GUEST_TSO4 7 /* Guest can handle TSOv4 in. */
|
||
|
|
#define VIRTIO_NET_F_GUEST_TSO6 8 /* Guest can handle TSOv6 in. */
|
||
|
|
#define VIRTIO_NET_F_GUEST_ECN 9 /* Guest can handle TSO[6] w/ ECN in. */
|
||
|
|
#define VIRTIO_NET_F_GUEST_UFO 10 /* Guest can handle UFO in. */
|
||
|
|
#define VIRTIO_NET_F_HOST_TSO4 11 /* Host can handle TSOv4 in. */
|
||
|
|
#define VIRTIO_NET_F_HOST_TSO6 12 /* Host can handle TSOv6 in. */
|
||
|
|
#define VIRTIO_NET_F_HOST_ECN 13 /* Host can handle TSO[6] w/ ECN in. */
|
||
|
|
#define VIRTIO_NET_F_HOST_UFO 14 /* Host can handle UFO in. */
|
||
|
|
#define VIRTIO_NET_F_MRG_RXBUF 15 /* Host can merge receive buffers. */
|
||
|
|
#define VIRTIO_NET_F_STATUS 16 /* virtio_net_config.status available */
|
||
|
|
#define VIRTIO_NET_F_CTRL_VQ 17 /* Control channel available */
|
||
|
|
#define VIRTIO_NET_F_CTRL_RX 18 /* Control channel RX mode support */
|
||
|
|
#define VIRTIO_NET_F_CTRL_VLAN 19 /* Control channel VLAN filtering */
|
||
|
|
#define VIRTIO_NET_F_CTRL_RX_EXTRA 20 /* Extra RX mode control support */
|
||
|
|
#define VIRTIO_NET_F_GUEST_ANNOUNCE 21 /* Guest can announce device on the
|
||
|
|
* network */
|
||
|
|
#define VIRTIO_NET_F_MQ 22 /* Device supports Receive Flow
|
||
|
|
* Steering */
|
||
|
|
#define VIRTIO_NET_F_CTRL_MAC_ADDR 23 /* Set MAC address */
|
||
|
|
|
||
|
|
#define VIRTIO_NET_F_HASH_REPORT 57 /* Supports hash report */
|
||
|
|
#define VIRTIO_NET_F_RSS 60 /* Supports RSS RX steering */
|
||
|
|
#define VIRTIO_NET_F_RSC_EXT 61 /* extended coalescing info */
|
||
|
|
#define VIRTIO_NET_F_STANDBY 62 /* Act as standby for another device
|
||
|
|
* with the same MAC.
|
||
|
|
*/
|
||
|
|
#define VIRTIO_NET_F_SPEED_DUPLEX 63 /* Device set linkspeed and duplex */
|
||
|
|
|
||
|
|
#ifndef VIRTIO_NET_NO_LEGACY
|
||
|
|
#define VIRTIO_NET_F_GSO 6 /* Host handles pkts w/ any GSO type */
|
||
|
|
#endif /* VIRTIO_NET_NO_LEGACY */
|
||
|
|
|
||
|
|
#define VIRTIO_NET_S_LINK_UP 1 /* Link is up */
|
||
|
|
#define VIRTIO_NET_S_ANNOUNCE 2 /* Announcement is needed */
|
||
|
|
|
||
|
|
/* supported/enabled hash types */
|
||
|
|
#define VIRTIO_NET_RSS_HASH_TYPE_IPv4 (1 << 0)
|
||
|
|
#define VIRTIO_NET_RSS_HASH_TYPE_TCPv4 (1 << 1)
|
||
|
|
#define VIRTIO_NET_RSS_HASH_TYPE_UDPv4 (1 << 2)
|
||
|
|
#define VIRTIO_NET_RSS_HASH_TYPE_IPv6 (1 << 3)
|
||
|
|
#define VIRTIO_NET_RSS_HASH_TYPE_TCPv6 (1 << 4)
|
||
|
|
#define VIRTIO_NET_RSS_HASH_TYPE_UDPv6 (1 << 5)
|
||
|
|
#define VIRTIO_NET_RSS_HASH_TYPE_IP_EX (1 << 6)
|
||
|
|
#define VIRTIO_NET_RSS_HASH_TYPE_TCP_EX (1 << 7)
|
||
|
|
#define VIRTIO_NET_RSS_HASH_TYPE_UDP_EX (1 << 8)
|
||
|
|
|
||
|
|
struct virtio_net_config {
|
||
|
|
/* The config defining mac address (if VIRTIO_NET_F_MAC) */
|
||
|
|
uint8_t mac[ETH_ALEN];
|
||
|
|
/* See VIRTIO_NET_F_STATUS and VIRTIO_NET_S_* above */
|
||
|
|
uint16_t status;
|
||
|
|
/* Maximum number of each of transmit and receive queues;
|
||
|
|
* see VIRTIO_NET_F_MQ and VIRTIO_NET_CTRL_MQ.
|
||
|
|
* Legal values are between 1 and 0x8000
|
||
|
|
*/
|
||
|
|
uint16_t max_virtqueue_pairs;
|
||
|
|
/* Default maximum transmit unit advice */
|
||
|
|
uint16_t mtu;
|
||
|
|
/*
|
||
|
|
* speed, in units of 1Mb. All values 0 to INT_MAX are legal.
|
||
|
|
* Any other value stands for unknown.
|
||
|
|
*/
|
||
|
|
uint32_t speed;
|
||
|
|
/*
|
||
|
|
* 0x00 - half duplex
|
||
|
|
* 0x01 - full duplex
|
||
|
|
* Any other value stands for unknown.
|
||
|
|
*/
|
||
|
|
uint8_t duplex;
|
||
|
|
/* maximum size of RSS key */
|
||
|
|
uint8_t rss_max_key_size;
|
||
|
|
/* maximum number of indirection table entries */
|
||
|
|
uint16_t rss_max_indirection_table_length;
|
||
|
|
/* bitmask of supported VIRTIO_NET_RSS_HASH_ types */
|
||
|
|
uint32_t supported_hash_types;
|
||
|
|
} QEMU_PACKED;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* This header comes first in the scatter-gather list. If you don't
|
||
|
|
* specify GSO or CSUM features, you can simply ignore the header.
|
||
|
|
*
|
||
|
|
* This is bitwise-equivalent to the legacy struct virtio_net_hdr_mrg_rxbuf,
|
||
|
|
* only flattened.
|
||
|
|
*/
|
||
|
|
struct virtio_net_hdr_v1 {
|
||
|
|
#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_F_RSC_INFO 4 /* rsc info in csum_ fields */
|
||
|
|
uint8_t flags;
|
||
|
|
#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 */
|
||
|
|
uint8_t gso_type;
|
||
|
|
__virtio16 hdr_len; /* Ethernet + IP + tcp/udp hdrs */
|
||
|
|
__virtio16 gso_size; /* Bytes to append to hdr_len per frame */
|
||
|
|
union {
|
||
|
|
struct {
|
||
|
|
__virtio16 csum_start;
|
||
|
|
__virtio16 csum_offset;
|
||
|
|
};
|
||
|
|
/* Checksum calculation */
|
||
|
|
struct {
|
||
|
|
/* Position to start checksumming from */
|
||
|
|
__virtio16 start;
|
||
|
|
/* Offset after that to place checksum */
|
||
|
|
__virtio16 offset;
|
||
|
|
} csum;
|
||
|
|
/* Receive Segment Coalescing */
|
||
|
|
struct {
|
||
|
|
/* Number of coalesced segments */
|
||
|
|
uint16_t segments;
|
||
|
|
/* Number of duplicated acks */
|
||
|
|
uint16_t dup_acks;
|
||
|
|
} rsc;
|
||
|
|
};
|
||
|
|
__virtio16 num_buffers; /* Number of merged rx buffers */
|
||
|
|
};
|
||
|
|
|
||
|
|
struct virtio_net_hdr_v1_hash {
|
||
|
|
struct virtio_net_hdr_v1 hdr;
|
||
|
|
uint32_t hash_value;
|
||
|
|
#define VIRTIO_NET_HASH_REPORT_NONE 0
|
||
|
|
#define VIRTIO_NET_HASH_REPORT_IPv4 1
|
||
|
|
#define VIRTIO_NET_HASH_REPORT_TCPv4 2
|
||
|
|
#define VIRTIO_NET_HASH_REPORT_UDPv4 3
|
||
|
|
#define VIRTIO_NET_HASH_REPORT_IPv6 4
|
||
|
|
#define VIRTIO_NET_HASH_REPORT_TCPv6 5
|
||
|
|
#define VIRTIO_NET_HASH_REPORT_UDPv6 6
|
||
|
|
#define VIRTIO_NET_HASH_REPORT_IPv6_EX 7
|
||
|
|
#define VIRTIO_NET_HASH_REPORT_TCPv6_EX 8
|
||
|
|
#define VIRTIO_NET_HASH_REPORT_UDPv6_EX 9
|
||
|
|
uint16_t hash_report;
|
||
|
|
uint16_t padding;
|
||
|
|
};
|
||
|
|
|
||
|
|
#ifndef VIRTIO_NET_NO_LEGACY
|
||
|
|
/* This header comes first in the scatter-gather list.
|
||
|
|
* For legacy virtio, if VIRTIO_F_ANY_LAYOUT is not negotiated, it must
|
||
|
|
* be the first element of the scatter-gather list. If you don't
|
||
|
|
* specify GSO or CSUM features, you can simply ignore the header. */
|
||
|
|
struct virtio_net_hdr {
|
||
|
|
/* See VIRTIO_NET_HDR_F_* */
|
||
|
|
uint8_t flags;
|
||
|
|
/* See VIRTIO_NET_HDR_GSO_* */
|
||
|
|
uint8_t gso_type;
|
||
|
|
__virtio16 hdr_len; /* Ethernet + IP + tcp/udp hdrs */
|
||
|
|
__virtio16 gso_size; /* Bytes to append to hdr_len per frame */
|
||
|
|
__virtio16 csum_start; /* Position to start checksumming from */
|
||
|
|
__virtio16 csum_offset; /* Offset after that to place checksum */
|
||
|
|
};
|
||
|
|
|
||
|
|
/* This is the version of the header to use when the MRG_RXBUF
|
||
|
|
* feature has been negotiated. */
|
||
|
|
struct virtio_net_hdr_mrg_rxbuf {
|
||
|
|
struct virtio_net_hdr hdr;
|
||
|
|
__virtio16 num_buffers; /* Number of merged rx buffers */
|
||
|
|
};
|
||
|
|
#endif /* ...VIRTIO_NET_NO_LEGACY */
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Control virtqueue data structures
|
||
|
|
*
|
||
|
|
* The control virtqueue expects a header in the first sg entry
|
||
|
|
* and an ack/status response in the last entry. Data for the
|
||
|
|
* command goes in between.
|
||
|
|
*/
|
||
|
|
struct virtio_net_ctrl_hdr {
|
||
|
|
uint8_t class;
|
||
|
|
uint8_t cmd;
|
||
|
|
} QEMU_PACKED;
|
||
|
|
|
||
|
|
typedef uint8_t virtio_net_ctrl_ack;
|
||
|
|
|
||
|
|
#define VIRTIO_NET_OK 0
|
||
|
|
#define VIRTIO_NET_ERR 1
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Control the RX mode, ie. promisucous, allmulti, etc...
|
||
|
|
* All commands require an "out" sg entry containing a 1 byte
|
||
|
|
* state value, zero = disable, non-zero = enable. Commands
|
||
|
|
* 0 and 1 are supported with the VIRTIO_NET_F_CTRL_RX feature.
|
||
|
|
* Commands 2-5 are added with VIRTIO_NET_F_CTRL_RX_EXTRA.
|
||
|
|
*/
|
||
|
|
#define VIRTIO_NET_CTRL_RX 0
|
||
|
|
#define VIRTIO_NET_CTRL_RX_PROMISC 0
|
||
|
|
#define VIRTIO_NET_CTRL_RX_ALLMULTI 1
|
||
|
|
#define VIRTIO_NET_CTRL_RX_ALLUNI 2
|
||
|
|
#define VIRTIO_NET_CTRL_RX_NOMULTI 3
|
||
|
|
#define VIRTIO_NET_CTRL_RX_NOUNI 4
|
||
|
|
#define VIRTIO_NET_CTRL_RX_NOBCAST 5
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Control the MAC
|
||
|
|
*
|
||
|
|
* The MAC filter table is managed by the hypervisor, the guest should
|
||
|
|
* assume the size is infinite. Filtering should be considered
|
||
|
|
* non-perfect, ie. based on hypervisor resources, the guest may
|
||
|
|
* received packets from sources not specified in the filter list.
|
||
|
|
*
|
||
|
|
* In addition to the class/cmd header, the TABLE_SET command requires
|
||
|
|
* two out scatterlists. Each contains a 4 byte count of entries followed
|
||
|
|
* by a concatenated byte stream of the ETH_ALEN MAC addresses. The
|
||
|
|
* first sg list contains unicast addresses, the second is for multicast.
|
||
|
|
* This functionality is present if the VIRTIO_NET_F_CTRL_RX feature
|
||
|
|
* is available.
|
||
|
|
*
|
||
|
|
* The ADDR_SET command requests one out scatterlist, it contains a
|
||
|
|
* 6 bytes MAC address. This functionality is present if the
|
||
|
|
* VIRTIO_NET_F_CTRL_MAC_ADDR feature is available.
|
||
|
|
*/
|
||
|
|
struct virtio_net_ctrl_mac {
|
||
|
|
__virtio32 entries;
|
||
|
|
uint8_t macs[][ETH_ALEN];
|
||
|
|
} QEMU_PACKED;
|
||
|
|
|
||
|
|
#define VIRTIO_NET_CTRL_MAC 1
|
||
|
|
#define VIRTIO_NET_CTRL_MAC_TABLE_SET 0
|
||
|
|
#define VIRTIO_NET_CTRL_MAC_ADDR_SET 1
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Control VLAN filtering
|
||
|
|
*
|
||
|
|
* The VLAN filter table is controlled via a simple ADD/DEL interface.
|
||
|
|
* VLAN IDs not added may be filterd by the hypervisor. Del is the
|
||
|
|
* opposite of add. Both commands expect an out entry containing a 2
|
||
|
|
* byte VLAN ID. VLAN filterting is available with the
|
||
|
|
* VIRTIO_NET_F_CTRL_VLAN feature bit.
|
||
|
|
*/
|
||
|
|
#define VIRTIO_NET_CTRL_VLAN 2
|
||
|
|
#define VIRTIO_NET_CTRL_VLAN_ADD 0
|
||
|
|
#define VIRTIO_NET_CTRL_VLAN_DEL 1
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Control link announce acknowledgement
|
||
|
|
*
|
||
|
|
* The command VIRTIO_NET_CTRL_ANNOUNCE_ACK is used to indicate that
|
||
|
|
* driver has recevied the notification; device would clear the
|
||
|
|
* VIRTIO_NET_S_ANNOUNCE bit in the status field after it receives
|
||
|
|
* this command.
|
||
|
|
*/
|
||
|
|
#define VIRTIO_NET_CTRL_ANNOUNCE 3
|
||
|
|
#define VIRTIO_NET_CTRL_ANNOUNCE_ACK 0
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Control Receive Flow Steering
|
||
|
|
*/
|
||
|
|
#define VIRTIO_NET_CTRL_MQ 4
|
||
|
|
/*
|
||
|
|
* The command VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET
|
||
|
|
* enables Receive Flow Steering, specifying the number of the transmit and
|
||
|
|
* receive queues that will be used. After the command is consumed and acked by
|
||
|
|
* the device, the device will not steer new packets on receive virtqueues
|
||
|
|
* other than specified nor read from transmit virtqueues other than specified.
|
||
|
|
* Accordingly, driver should not transmit new packets on virtqueues other than
|
||
|
|
* specified.
|
||
|
|
*/
|
||
|
|
struct virtio_net_ctrl_mq {
|
||
|
|
__virtio16 virtqueue_pairs;
|
||
|
|
};
|
||
|
|
|
||
|
|
#define VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET 0
|
||
|
|
#define VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MIN 1
|
||
|
|
#define VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MAX 0x8000
|
||
|
|
|
||
|
|
/*
|
||
|
|
* The command VIRTIO_NET_CTRL_MQ_RSS_CONFIG has the same effect as
|
||
|
|
* VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET does and additionally configures
|
||
|
|
* the receive steering to use a hash calculated for incoming packet
|
||
|
|
* to decide on receive virtqueue to place the packet. The command
|
||
|
|
* also provides parameters to calculate a hash and receive virtqueue.
|
||
|
|
*/
|
||
|
|
struct virtio_net_rss_config {
|
||
|
|
uint32_t hash_types;
|
||
|
|
uint16_t indirection_table_mask;
|
||
|
|
uint16_t unclassified_queue;
|
||
|
|
uint16_t indirection_table[1/* + indirection_table_mask */];
|
||
|
|
uint16_t max_tx_vq;
|
||
|
|
uint8_t hash_key_length;
|
||
|
|
uint8_t hash_key_data[/* hash_key_length */];
|
||
|
|
};
|
||
|
|
|
||
|
|
#define VIRTIO_NET_CTRL_MQ_RSS_CONFIG 1
|
||
|
|
|
||
|
|
/*
|
||
|
|
* The command VIRTIO_NET_CTRL_MQ_HASH_CONFIG requests the device
|
||
|
|
* to include in the virtio header of the packet the value of the
|
||
|
|
* calculated hash and the report type of hash. It also provides
|
||
|
|
* parameters for hash calculation. The command requires feature
|
||
|
|
* VIRTIO_NET_F_HASH_REPORT to be negotiated to extend the
|
||
|
|
* layout of virtio header as defined in virtio_net_hdr_v1_hash.
|
||
|
|
*/
|
||
|
|
struct virtio_net_hash_config {
|
||
|
|
uint32_t hash_types;
|
||
|
|
/* for compatibility with virtio_net_rss_config */
|
||
|
|
uint16_t reserved[4];
|
||
|
|
uint8_t hash_key_length;
|
||
|
|
uint8_t hash_key_data[/* hash_key_length */];
|
||
|
|
};
|
||
|
|
|
||
|
|
#define VIRTIO_NET_CTRL_MQ_HASH_CONFIG 2
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Control network offloads
|
||
|
|
*
|
||
|
|
* Reconfigures the network offloads that Guest can handle.
|
||
|
|
*
|
||
|
|
* Available with the VIRTIO_NET_F_CTRL_GUEST_OFFLOADS feature bit.
|
||
|
|
*
|
||
|
|
* Command data format matches the feature bit mask exactly.
|
||
|
|
*
|
||
|
|
* See VIRTIO_NET_F_GUEST_* for the list of offloads
|
||
|
|
* that can be enabled/disabled.
|
||
|
|
*/
|
||
|
|
#define VIRTIO_NET_CTRL_GUEST_OFFLOADS 5
|
||
|
|
#define VIRTIO_NET_CTRL_GUEST_OFFLOADS_SET 0
|
||
|
|
|
||
|
|
#endif /* _LINUX_VIRTIO_NET_H */
|