358 lines
14 KiB
C
358 lines
14 KiB
C
#ifndef _LINUX_VIRTIO_NET_H
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#define _LINUX_VIRTIO_NET_H
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/* This header is BSD licensed so anyone can use the definitions to implement
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* compatible drivers/servers.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of IBM nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL IBM OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE. */
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#include "standard-headers/linux/types.h"
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#include "standard-headers/linux/virtio_ids.h"
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#include "standard-headers/linux/virtio_config.h"
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#include "standard-headers/linux/virtio_types.h"
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#include "standard-headers/linux/if_ether.h"
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/* The feature bitmap for virtio net */
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#define VIRTIO_NET_F_CSUM 0 /* Host handles pkts w/ partial csum */
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#define VIRTIO_NET_F_GUEST_CSUM 1 /* Guest handles pkts w/ partial csum */
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#define VIRTIO_NET_F_CTRL_GUEST_OFFLOADS 2 /* Dynamic offload configuration. */
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#define VIRTIO_NET_F_MTU 3 /* Initial MTU advice */
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#define VIRTIO_NET_F_MAC 5 /* Host has given MAC address. */
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#define VIRTIO_NET_F_GUEST_TSO4 7 /* Guest can handle TSOv4 in. */
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#define VIRTIO_NET_F_GUEST_TSO6 8 /* Guest can handle TSOv6 in. */
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#define VIRTIO_NET_F_GUEST_ECN 9 /* Guest can handle TSO[6] w/ ECN in. */
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#define VIRTIO_NET_F_GUEST_UFO 10 /* Guest can handle UFO in. */
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#define VIRTIO_NET_F_HOST_TSO4 11 /* Host can handle TSOv4 in. */
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#define VIRTIO_NET_F_HOST_TSO6 12 /* Host can handle TSOv6 in. */
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#define VIRTIO_NET_F_HOST_ECN 13 /* Host can handle TSO[6] w/ ECN in. */
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#define VIRTIO_NET_F_HOST_UFO 14 /* Host can handle UFO in. */
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#define VIRTIO_NET_F_MRG_RXBUF 15 /* Host can merge receive buffers. */
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#define VIRTIO_NET_F_STATUS 16 /* virtio_net_config.status available */
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#define VIRTIO_NET_F_CTRL_VQ 17 /* Control channel available */
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#define VIRTIO_NET_F_CTRL_RX 18 /* Control channel RX mode support */
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#define VIRTIO_NET_F_CTRL_VLAN 19 /* Control channel VLAN filtering */
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#define VIRTIO_NET_F_CTRL_RX_EXTRA 20 /* Extra RX mode control support */
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#define VIRTIO_NET_F_GUEST_ANNOUNCE 21 /* Guest can announce device on the
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* network */
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#define VIRTIO_NET_F_MQ 22 /* Device supports Receive Flow
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* Steering */
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#define VIRTIO_NET_F_CTRL_MAC_ADDR 23 /* Set MAC address */
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#define VIRTIO_NET_F_HASH_REPORT 57 /* Supports hash report */
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#define VIRTIO_NET_F_RSS 60 /* Supports RSS RX steering */
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#define VIRTIO_NET_F_RSC_EXT 61 /* extended coalescing info */
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#define VIRTIO_NET_F_STANDBY 62 /* Act as standby for another device
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* with the same MAC.
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*/
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#define VIRTIO_NET_F_SPEED_DUPLEX 63 /* Device set linkspeed and duplex */
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#ifndef VIRTIO_NET_NO_LEGACY
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#define VIRTIO_NET_F_GSO 6 /* Host handles pkts w/ any GSO type */
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#endif /* VIRTIO_NET_NO_LEGACY */
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#define VIRTIO_NET_S_LINK_UP 1 /* Link is up */
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#define VIRTIO_NET_S_ANNOUNCE 2 /* Announcement is needed */
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/* supported/enabled hash types */
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#define VIRTIO_NET_RSS_HASH_TYPE_IPv4 (1 << 0)
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#define VIRTIO_NET_RSS_HASH_TYPE_TCPv4 (1 << 1)
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#define VIRTIO_NET_RSS_HASH_TYPE_UDPv4 (1 << 2)
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#define VIRTIO_NET_RSS_HASH_TYPE_IPv6 (1 << 3)
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#define VIRTIO_NET_RSS_HASH_TYPE_TCPv6 (1 << 4)
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#define VIRTIO_NET_RSS_HASH_TYPE_UDPv6 (1 << 5)
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#define VIRTIO_NET_RSS_HASH_TYPE_IP_EX (1 << 6)
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#define VIRTIO_NET_RSS_HASH_TYPE_TCP_EX (1 << 7)
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#define VIRTIO_NET_RSS_HASH_TYPE_UDP_EX (1 << 8)
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struct virtio_net_config {
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/* The config defining mac address (if VIRTIO_NET_F_MAC) */
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uint8_t mac[ETH_ALEN];
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/* See VIRTIO_NET_F_STATUS and VIRTIO_NET_S_* above */
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__virtio16 status;
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/* Maximum number of each of transmit and receive queues;
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* see VIRTIO_NET_F_MQ and VIRTIO_NET_CTRL_MQ.
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* Legal values are between 1 and 0x8000
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*/
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__virtio16 max_virtqueue_pairs;
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/* Default maximum transmit unit advice */
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__virtio16 mtu;
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/*
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* speed, in units of 1Mb. All values 0 to INT_MAX are legal.
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* Any other value stands for unknown.
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*/
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uint32_t speed;
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/*
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* 0x00 - half duplex
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* 0x01 - full duplex
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* Any other value stands for unknown.
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*/
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uint8_t duplex;
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/* maximum size of RSS key */
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uint8_t rss_max_key_size;
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/* maximum number of indirection table entries */
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uint16_t rss_max_indirection_table_length;
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/* bitmask of supported VIRTIO_NET_RSS_HASH_ types */
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uint32_t supported_hash_types;
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} QEMU_PACKED;
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/*
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* This header comes first in the scatter-gather list. If you don't
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* specify GSO or CSUM features, you can simply ignore the header.
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*
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* This is bitwise-equivalent to the legacy struct virtio_net_hdr_mrg_rxbuf,
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* only flattened.
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*/
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struct virtio_net_hdr_v1 {
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#define VIRTIO_NET_HDR_F_NEEDS_CSUM 1 /* Use csum_start, csum_offset */
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#define VIRTIO_NET_HDR_F_DATA_VALID 2 /* Csum is valid */
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#define VIRTIO_NET_HDR_F_RSC_INFO 4 /* rsc info in csum_ fields */
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uint8_t flags;
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#define VIRTIO_NET_HDR_GSO_NONE 0 /* Not a GSO frame */
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#define VIRTIO_NET_HDR_GSO_TCPV4 1 /* GSO frame, IPv4 TCP (TSO) */
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#define VIRTIO_NET_HDR_GSO_UDP 3 /* GSO frame, IPv4 UDP (UFO) */
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#define VIRTIO_NET_HDR_GSO_TCPV6 4 /* GSO frame, IPv6 TCP */
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#define VIRTIO_NET_HDR_GSO_ECN 0x80 /* TCP has ECN set */
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uint8_t gso_type;
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__virtio16 hdr_len; /* Ethernet + IP + tcp/udp hdrs */
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__virtio16 gso_size; /* Bytes to append to hdr_len per frame */
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union {
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struct {
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__virtio16 csum_start;
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__virtio16 csum_offset;
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};
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/* Checksum calculation */
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struct {
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/* Position to start checksumming from */
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__virtio16 start;
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/* Offset after that to place checksum */
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__virtio16 offset;
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} csum;
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/* Receive Segment Coalescing */
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struct {
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/* Number of coalesced segments */
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uint16_t segments;
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/* Number of duplicated acks */
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uint16_t dup_acks;
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} rsc;
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};
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__virtio16 num_buffers; /* Number of merged rx buffers */
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};
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struct virtio_net_hdr_v1_hash {
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struct virtio_net_hdr_v1 hdr;
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uint32_t hash_value;
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#define VIRTIO_NET_HASH_REPORT_NONE 0
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#define VIRTIO_NET_HASH_REPORT_IPv4 1
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#define VIRTIO_NET_HASH_REPORT_TCPv4 2
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#define VIRTIO_NET_HASH_REPORT_UDPv4 3
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#define VIRTIO_NET_HASH_REPORT_IPv6 4
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#define VIRTIO_NET_HASH_REPORT_TCPv6 5
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#define VIRTIO_NET_HASH_REPORT_UDPv6 6
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#define VIRTIO_NET_HASH_REPORT_IPv6_EX 7
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#define VIRTIO_NET_HASH_REPORT_TCPv6_EX 8
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#define VIRTIO_NET_HASH_REPORT_UDPv6_EX 9
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uint16_t hash_report;
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uint16_t padding;
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};
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#ifndef VIRTIO_NET_NO_LEGACY
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/* This header comes first in the scatter-gather list.
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* For legacy virtio, if VIRTIO_F_ANY_LAYOUT is not negotiated, it must
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* be the first element of the scatter-gather list. If you don't
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* specify GSO or CSUM features, you can simply ignore the header. */
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struct virtio_net_hdr {
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/* See VIRTIO_NET_HDR_F_* */
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uint8_t flags;
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/* See VIRTIO_NET_HDR_GSO_* */
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uint8_t gso_type;
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__virtio16 hdr_len; /* Ethernet + IP + tcp/udp hdrs */
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__virtio16 gso_size; /* Bytes to append to hdr_len per frame */
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__virtio16 csum_start; /* Position to start checksumming from */
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__virtio16 csum_offset; /* Offset after that to place checksum */
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};
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/* This is the version of the header to use when the MRG_RXBUF
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* feature has been negotiated. */
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struct virtio_net_hdr_mrg_rxbuf {
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struct virtio_net_hdr hdr;
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__virtio16 num_buffers; /* Number of merged rx buffers */
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};
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#endif /* ...VIRTIO_NET_NO_LEGACY */
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/*
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* Control virtqueue data structures
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*
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* The control virtqueue expects a header in the first sg entry
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* and an ack/status response in the last entry. Data for the
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* command goes in between.
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*/
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struct virtio_net_ctrl_hdr {
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uint8_t class;
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uint8_t cmd;
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} QEMU_PACKED;
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typedef uint8_t virtio_net_ctrl_ack;
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#define VIRTIO_NET_OK 0
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#define VIRTIO_NET_ERR 1
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/*
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* Control the RX mode, ie. promisucous, allmulti, etc...
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* All commands require an "out" sg entry containing a 1 byte
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* state value, zero = disable, non-zero = enable. Commands
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* 0 and 1 are supported with the VIRTIO_NET_F_CTRL_RX feature.
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* Commands 2-5 are added with VIRTIO_NET_F_CTRL_RX_EXTRA.
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*/
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#define VIRTIO_NET_CTRL_RX 0
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#define VIRTIO_NET_CTRL_RX_PROMISC 0
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#define VIRTIO_NET_CTRL_RX_ALLMULTI 1
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#define VIRTIO_NET_CTRL_RX_ALLUNI 2
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#define VIRTIO_NET_CTRL_RX_NOMULTI 3
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#define VIRTIO_NET_CTRL_RX_NOUNI 4
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#define VIRTIO_NET_CTRL_RX_NOBCAST 5
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/*
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* Control the MAC
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*
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* The MAC filter table is managed by the hypervisor, the guest should
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* assume the size is infinite. Filtering should be considered
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* non-perfect, ie. based on hypervisor resources, the guest may
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* received packets from sources not specified in the filter list.
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*
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* In addition to the class/cmd header, the TABLE_SET command requires
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* two out scatterlists. Each contains a 4 byte count of entries followed
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* by a concatenated byte stream of the ETH_ALEN MAC addresses. The
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* first sg list contains unicast addresses, the second is for multicast.
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* This functionality is present if the VIRTIO_NET_F_CTRL_RX feature
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* is available.
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*
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* The ADDR_SET command requests one out scatterlist, it contains a
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* 6 bytes MAC address. This functionality is present if the
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* VIRTIO_NET_F_CTRL_MAC_ADDR feature is available.
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*/
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struct virtio_net_ctrl_mac {
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__virtio32 entries;
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uint8_t macs[][ETH_ALEN];
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} QEMU_PACKED;
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#define VIRTIO_NET_CTRL_MAC 1
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#define VIRTIO_NET_CTRL_MAC_TABLE_SET 0
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#define VIRTIO_NET_CTRL_MAC_ADDR_SET 1
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/*
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* Control VLAN filtering
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*
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* The VLAN filter table is controlled via a simple ADD/DEL interface.
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* VLAN IDs not added may be filterd by the hypervisor. Del is the
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* opposite of add. Both commands expect an out entry containing a 2
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* byte VLAN ID. VLAN filterting is available with the
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* VIRTIO_NET_F_CTRL_VLAN feature bit.
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*/
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#define VIRTIO_NET_CTRL_VLAN 2
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#define VIRTIO_NET_CTRL_VLAN_ADD 0
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#define VIRTIO_NET_CTRL_VLAN_DEL 1
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/*
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* Control link announce acknowledgement
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*
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* The command VIRTIO_NET_CTRL_ANNOUNCE_ACK is used to indicate that
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* driver has recevied the notification; device would clear the
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* VIRTIO_NET_S_ANNOUNCE bit in the status field after it receives
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* this command.
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*/
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#define VIRTIO_NET_CTRL_ANNOUNCE 3
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#define VIRTIO_NET_CTRL_ANNOUNCE_ACK 0
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/*
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* Control Receive Flow Steering
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*/
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#define VIRTIO_NET_CTRL_MQ 4
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/*
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* The command VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET
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* enables Receive Flow Steering, specifying the number of the transmit and
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* receive queues that will be used. After the command is consumed and acked by
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* the device, the device will not steer new packets on receive virtqueues
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* other than specified nor read from transmit virtqueues other than specified.
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* Accordingly, driver should not transmit new packets on virtqueues other than
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* specified.
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*/
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struct virtio_net_ctrl_mq {
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__virtio16 virtqueue_pairs;
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};
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#define VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET 0
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#define VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MIN 1
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#define VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MAX 0x8000
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/*
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* The command VIRTIO_NET_CTRL_MQ_RSS_CONFIG has the same effect as
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* VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET does and additionally configures
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* the receive steering to use a hash calculated for incoming packet
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* to decide on receive virtqueue to place the packet. The command
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* also provides parameters to calculate a hash and receive virtqueue.
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*/
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struct virtio_net_rss_config {
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uint32_t hash_types;
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uint16_t indirection_table_mask;
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uint16_t unclassified_queue;
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uint16_t indirection_table[1/* + indirection_table_mask */];
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uint16_t max_tx_vq;
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uint8_t hash_key_length;
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uint8_t hash_key_data[/* hash_key_length */];
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};
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#define VIRTIO_NET_CTRL_MQ_RSS_CONFIG 1
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/*
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* The command VIRTIO_NET_CTRL_MQ_HASH_CONFIG requests the device
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* to include in the virtio header of the packet the value of the
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* calculated hash and the report type of hash. It also provides
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* parameters for hash calculation. The command requires feature
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* VIRTIO_NET_F_HASH_REPORT to be negotiated to extend the
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* layout of virtio header as defined in virtio_net_hdr_v1_hash.
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*/
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struct virtio_net_hash_config {
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uint32_t hash_types;
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/* for compatibility with virtio_net_rss_config */
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uint16_t reserved[4];
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uint8_t hash_key_length;
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uint8_t hash_key_data[/* hash_key_length */];
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};
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#define VIRTIO_NET_CTRL_MQ_HASH_CONFIG 2
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/*
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* Control network offloads
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*
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* Reconfigures the network offloads that Guest can handle.
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*
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* Available with the VIRTIO_NET_F_CTRL_GUEST_OFFLOADS feature bit.
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*
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* Command data format matches the feature bit mask exactly.
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*
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* See VIRTIO_NET_F_GUEST_* for the list of offloads
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* that can be enabled/disabled.
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*/
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#define VIRTIO_NET_CTRL_GUEST_OFFLOADS 5
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#define VIRTIO_NET_CTRL_GUEST_OFFLOADS_SET 0
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#endif /* _LINUX_VIRTIO_NET_H */
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