1228301Sgrehan/*- 2227652Sgrehan * This header is BSD licensed so anyone can use the definitions to implement 3227652Sgrehan * compatible drivers/servers. 4227652Sgrehan * 5228301Sgrehan * Redistribution and use in source and binary forms, with or without 6228301Sgrehan * modification, are permitted provided that the following conditions 7228301Sgrehan * are met: 8228301Sgrehan * 1. Redistributions of source code must retain the above copyright 9228301Sgrehan * notice, this list of conditions and the following disclaimer. 10228301Sgrehan * 2. Redistributions in binary form must reproduce the above copyright 11228301Sgrehan * notice, this list of conditions and the following disclaimer in the 12228301Sgrehan * documentation and/or other materials provided with the distribution. 13228301Sgrehan * 3. Neither the name of IBM nor the names of its contributors 14228301Sgrehan * may be used to endorse or promote products derived from this software 15228301Sgrehan * without specific prior written permission. 16228301Sgrehan * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17228301Sgrehan * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 18228301Sgrehan * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19228301Sgrehan * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL IBM OR CONTRIBUTORS BE LIABLE 20228301Sgrehan * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21228301Sgrehan * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22228301Sgrehan * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23228301Sgrehan * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24228301Sgrehan * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25228301Sgrehan * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26228301Sgrehan * SUCH DAMAGE. 27228301Sgrehan * 28227652Sgrehan * $FreeBSD$ 29227652Sgrehan */ 30227652Sgrehan 31227652Sgrehan#ifndef _VIRTIO_NET_H 32227652Sgrehan#define _VIRTIO_NET_H 33227652Sgrehan 34227652Sgrehan/* The feature bitmap for virtio net */ 35227652Sgrehan#define VIRTIO_NET_F_CSUM 0x00001 /* Host handles pkts w/ partial csum */ 36227652Sgrehan#define VIRTIO_NET_F_GUEST_CSUM 0x00002 /* Guest handles pkts w/ partial csum*/ 37227652Sgrehan#define VIRTIO_NET_F_MAC 0x00020 /* Host has given MAC address. */ 38227652Sgrehan#define VIRTIO_NET_F_GSO 0x00040 /* Host handles pkts w/ any GSO type */ 39227652Sgrehan#define VIRTIO_NET_F_GUEST_TSO4 0x00080 /* Guest can handle TSOv4 in. */ 40227652Sgrehan#define VIRTIO_NET_F_GUEST_TSO6 0x00100 /* Guest can handle TSOv6 in. */ 41227652Sgrehan#define VIRTIO_NET_F_GUEST_ECN 0x00200 /* Guest can handle TSO[6] w/ ECN in.*/ 42227652Sgrehan#define VIRTIO_NET_F_GUEST_UFO 0x00400 /* Guest can handle UFO in. */ 43227652Sgrehan#define VIRTIO_NET_F_HOST_TSO4 0x00800 /* Host can handle TSOv4 in. */ 44227652Sgrehan#define VIRTIO_NET_F_HOST_TSO6 0x01000 /* Host can handle TSOv6 in. */ 45227652Sgrehan#define VIRTIO_NET_F_HOST_ECN 0x02000 /* Host can handle TSO[6] w/ ECN in. */ 46227652Sgrehan#define VIRTIO_NET_F_HOST_UFO 0x04000 /* Host can handle UFO in. */ 47227652Sgrehan#define VIRTIO_NET_F_MRG_RXBUF 0x08000 /* Host can merge receive buffers. */ 48227652Sgrehan#define VIRTIO_NET_F_STATUS 0x10000 /* virtio_net_config.status available*/ 49227652Sgrehan#define VIRTIO_NET_F_CTRL_VQ 0x20000 /* Control channel available */ 50227652Sgrehan#define VIRTIO_NET_F_CTRL_RX 0x40000 /* Control channel RX mode support */ 51227652Sgrehan#define VIRTIO_NET_F_CTRL_VLAN 0x80000 /* Control channel VLAN filtering */ 52227652Sgrehan#define VIRTIO_NET_F_CTRL_RX_EXTRA 0x100000 /* Extra RX mode control support */ 53255111Sbryanv#define VIRTIO_NET_F_GUEST_ANNOUNCE 0x200000 /* Announce device on network */ 54255111Sbryanv#define VIRTIO_NET_F_MQ 0x400000 /* Device supports RFS */ 55255111Sbryanv#define VIRTIO_NET_F_CTRL_MAC_ADDR 0x800000 /* Set MAC address */ 56227652Sgrehan 57227652Sgrehan#define VIRTIO_NET_S_LINK_UP 1 /* Link is up */ 58227652Sgrehan 59227652Sgrehanstruct virtio_net_config { 60227652Sgrehan /* The config defining mac address (if VIRTIO_NET_F_MAC) */ 61255111Sbryanv uint8_t mac[ETHER_ADDR_LEN]; 62227652Sgrehan /* See VIRTIO_NET_F_STATUS and VIRTIO_NET_S_* above */ 63227652Sgrehan uint16_t status; 64255111Sbryanv /* Maximum number of each of transmit and receive queues; 65255111Sbryanv * see VIRTIO_NET_F_MQ and VIRTIO_NET_CTRL_MQ. 66255111Sbryanv * Legal values are between 1 and 0x8000. 67255111Sbryanv */ 68255111Sbryanv uint16_t max_virtqueue_pairs; 69227652Sgrehan} __packed; 70227652Sgrehan 71227652Sgrehan/* 72227652Sgrehan * This is the first element of the scatter-gather list. If you don't 73227652Sgrehan * specify GSO or CSUM features, you can simply ignore the header. 74227652Sgrehan */ 75227652Sgrehanstruct virtio_net_hdr { 76227652Sgrehan#define VIRTIO_NET_HDR_F_NEEDS_CSUM 1 /* Use csum_start,csum_offset*/ 77255111Sbryanv#define VIRTIO_NET_HDR_F_DATA_VALID 2 /* Csum is valid */ 78227652Sgrehan uint8_t flags; 79227652Sgrehan#define VIRTIO_NET_HDR_GSO_NONE 0 /* Not a GSO frame */ 80227652Sgrehan#define VIRTIO_NET_HDR_GSO_TCPV4 1 /* GSO frame, IPv4 TCP (TSO) */ 81227652Sgrehan#define VIRTIO_NET_HDR_GSO_UDP 3 /* GSO frame, IPv4 UDP (UFO) */ 82227652Sgrehan#define VIRTIO_NET_HDR_GSO_TCPV6 4 /* GSO frame, IPv6 TCP */ 83227652Sgrehan#define VIRTIO_NET_HDR_GSO_ECN 0x80 /* TCP has ECN set */ 84227652Sgrehan uint8_t gso_type; 85227652Sgrehan uint16_t hdr_len; /* Ethernet + IP + tcp/udp hdrs */ 86227652Sgrehan uint16_t gso_size; /* Bytes to append to hdr_len per frame */ 87227652Sgrehan uint16_t csum_start; /* Position to start checksumming from */ 88227652Sgrehan uint16_t csum_offset; /* Offset after that to place checksum */ 89227652Sgrehan}; 90227652Sgrehan 91227652Sgrehan/* 92227652Sgrehan * This is the version of the header to use when the MRG_RXBUF 93227652Sgrehan * feature has been negotiated. 94227652Sgrehan */ 95227652Sgrehanstruct virtio_net_hdr_mrg_rxbuf { 96227652Sgrehan struct virtio_net_hdr hdr; 97227652Sgrehan uint16_t num_buffers; /* Number of merged rx buffers */ 98227652Sgrehan}; 99227652Sgrehan 100227652Sgrehan/* 101227652Sgrehan * Control virtqueue data structures 102227652Sgrehan * 103227652Sgrehan * The control virtqueue expects a header in the first sg entry 104227652Sgrehan * and an ack/status response in the last entry. Data for the 105227652Sgrehan * command goes in between. 106227652Sgrehan */ 107227652Sgrehanstruct virtio_net_ctrl_hdr { 108227652Sgrehan uint8_t class; 109227652Sgrehan uint8_t cmd; 110227652Sgrehan} __packed; 111227652Sgrehan 112227652Sgrehan#define VIRTIO_NET_OK 0 113227652Sgrehan#define VIRTIO_NET_ERR 1 114227652Sgrehan 115227652Sgrehan/* 116227652Sgrehan * Control the RX mode, ie. promiscuous, allmulti, etc... 117227652Sgrehan * All commands require an "out" sg entry containing a 1 byte 118227652Sgrehan * state value, zero = disable, non-zero = enable. Commands 119227652Sgrehan * 0 and 1 are supported with the VIRTIO_NET_F_CTRL_RX feature. 120227652Sgrehan * Commands 2-5 are added with VIRTIO_NET_F_CTRL_RX_EXTRA. 121227652Sgrehan */ 122227652Sgrehan#define VIRTIO_NET_CTRL_RX 0 123227652Sgrehan#define VIRTIO_NET_CTRL_RX_PROMISC 0 124227652Sgrehan#define VIRTIO_NET_CTRL_RX_ALLMULTI 1 125227652Sgrehan#define VIRTIO_NET_CTRL_RX_ALLUNI 2 126227652Sgrehan#define VIRTIO_NET_CTRL_RX_NOMULTI 3 127227652Sgrehan#define VIRTIO_NET_CTRL_RX_NOUNI 4 128227652Sgrehan#define VIRTIO_NET_CTRL_RX_NOBCAST 5 129227652Sgrehan 130227652Sgrehan/* 131227652Sgrehan * Control the MAC filter table. 132227652Sgrehan * 133227652Sgrehan * The MAC filter table is managed by the hypervisor, the guest should 134227652Sgrehan * assume the size is infinite. Filtering should be considered 135227652Sgrehan * non-perfect, ie. based on hypervisor resources, the guest may 136227652Sgrehan * received packets from sources not specified in the filter list. 137227652Sgrehan * 138227652Sgrehan * In addition to the class/cmd header, the TABLE_SET command requires 139227652Sgrehan * two out scatterlists. Each contains a 4 byte count of entries followed 140227652Sgrehan * by a concatenated byte stream of the ETH_ALEN MAC addresses. The 141227652Sgrehan * first sg list contains unicast addresses, the second is for multicast. 142227652Sgrehan * This functionality is present if the VIRTIO_NET_F_CTRL_RX feature 143227652Sgrehan * is available. 144255111Sbryanv * 145255111Sbryanv * The ADDR_SET command requests one out scatterlist, it contains a 146255111Sbryanv * 6 bytes MAC address. This functionality is present if the 147255111Sbryanv * VIRTIO_NET_F_CTRL_MAC_ADDR feature is available. 148227652Sgrehan */ 149227652Sgrehanstruct virtio_net_ctrl_mac { 150227652Sgrehan uint32_t entries; 151227652Sgrehan uint8_t macs[][ETHER_ADDR_LEN]; 152227652Sgrehan} __packed; 153227652Sgrehan 154227652Sgrehan#define VIRTIO_NET_CTRL_MAC 1 155227652Sgrehan#define VIRTIO_NET_CTRL_MAC_TABLE_SET 0 156255111Sbryanv#define VIRTIO_NET_CTRL_MAC_ADDR_SET 1 157227652Sgrehan 158227652Sgrehan/* 159227652Sgrehan * Control VLAN filtering 160227652Sgrehan * 161227652Sgrehan * The VLAN filter table is controlled via a simple ADD/DEL interface. 162227652Sgrehan * VLAN IDs not added may be filtered by the hypervisor. Del is the 163227652Sgrehan * opposite of add. Both commands expect an out entry containing a 2 164227652Sgrehan * byte VLAN ID. VLAN filtering is available with the 165227652Sgrehan * VIRTIO_NET_F_CTRL_VLAN feature bit. 166227652Sgrehan */ 167227652Sgrehan#define VIRTIO_NET_CTRL_VLAN 2 168227652Sgrehan#define VIRTIO_NET_CTRL_VLAN_ADD 0 169227652Sgrehan#define VIRTIO_NET_CTRL_VLAN_DEL 1 170227652Sgrehan 171255111Sbryanv/* 172255111Sbryanv * Control link announce acknowledgement 173255111Sbryanv * 174255111Sbryanv * The command VIRTIO_NET_CTRL_ANNOUNCE_ACK is used to indicate that 175255111Sbryanv * driver has recevied the notification; device would clear the 176255111Sbryanv * VIRTIO_NET_S_ANNOUNCE bit in the status field after it receives 177255111Sbryanv * this command. 178255111Sbryanv */ 179255111Sbryanv#define VIRTIO_NET_CTRL_ANNOUNCE 3 180255111Sbryanv#define VIRTIO_NET_CTRL_ANNOUNCE_ACK 0 181255111Sbryanv 182255111Sbryanv/* 183255111Sbryanv * Control Receive Flow Steering 184255111Sbryanv * 185255111Sbryanv * The command VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET enables Receive Flow 186255111Sbryanv * Steering, specifying the number of the transmit and receive queues 187255111Sbryanv * that will be used. After the command is consumed and acked by the 188255111Sbryanv * device, the device will not steer new packets on receive virtqueues 189255111Sbryanv * other than specified nor read from transmit virtqueues other than 190255111Sbryanv * specified. Accordingly, driver should not transmit new packets on 191255111Sbryanv * virtqueues other than specified. 192255111Sbryanv */ 193255111Sbryanvstruct virtio_net_ctrl_mq { 194255111Sbryanv uint16_t virtqueue_pairs; 195255111Sbryanv} __packed; 196255111Sbryanv 197255111Sbryanv#define VIRTIO_NET_CTRL_MQ 4 198255111Sbryanv#define VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET 0 199255111Sbryanv#define VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MIN 1 200255111Sbryanv#define VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MAX 0x8000 201255111Sbryanv 202227652Sgrehan#endif /* _VIRTIO_NET_H */ 203