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usr.sbin/bhyve/mmio/net_backends.h
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| /*- | |||||
| * SPDX-License-Identifier: BSD-2-Clause-FreeBSD | |||||
| * | |||||
| * Copyright (c) 2019 Vincenzo Maffione <vmaffione@FreeBSD.org> | |||||
| * | |||||
| * 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. | |||||
| * | |||||
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 THE AUTHOR 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. | |||||
| * | |||||
| * $FreeBSD$ | |||||
| */ | |||||
| #ifndef __NET_BACKENDS_H__ | |||||
| #define __NET_BACKENDS_H__ | |||||
| #include <stdint.h> | |||||
| /* Opaque type representing a network backend. */ | |||||
| typedef struct net_backend net_backend_t; | |||||
| /* Interface between network frontends and the network backends. */ | |||||
| typedef void (*net_be_rxeof_t)(int, enum ev_type, void *param); | |||||
| int netbe_init(net_backend_t **be, const char *opts, net_be_rxeof_t cb, | |||||
| void *param); | |||||
| void netbe_cleanup(net_backend_t *be); | |||||
| uint64_t netbe_get_cap(net_backend_t *be); | |||||
| int netbe_set_cap(net_backend_t *be, uint64_t cap, | |||||
| unsigned vnet_hdr_len); | |||||
| size_t netbe_get_vnet_hdr_len(net_backend_t *be); | |||||
| ssize_t netbe_send(net_backend_t *be, const struct iovec *iov, int iovcnt); | |||||
| ssize_t netbe_peek_recvlen(net_backend_t *be); | |||||
| ssize_t netbe_recv(net_backend_t *be, const struct iovec *iov, int iovcnt); | |||||
| ssize_t netbe_rx_discard(net_backend_t *be); | |||||
| void netbe_rx_disable(net_backend_t *be); | |||||
| void netbe_rx_enable(net_backend_t *be); | |||||
| /* | |||||
| * Network device capabilities taken from the VirtIO standard. | |||||
| * Despite the name, these capabilities can be used by different frontents | |||||
| * (virtio-net, ptnet) and supported by different backends (netmap, tap, ...). | |||||
| */ | |||||
| #define VIRTIO_NET_F_CSUM (1 << 0) /* host handles partial cksum */ | |||||
| #define VIRTIO_NET_F_GUEST_CSUM (1 << 1) /* guest handles partial cksum */ | |||||
| #define VIRTIO_NET_F_MTU (1 << 3) /* initial MTU advice */ | |||||
| #define VIRTIO_NET_F_MAC (1 << 5) /* host supplies MAC */ | |||||
| #define VIRTIO_NET_F_GSO_DEPREC (1 << 6) /* deprecated: host handles GSO */ | |||||
| #define VIRTIO_NET_F_GUEST_TSO4 (1 << 7) /* guest can rcv TSOv4 */ | |||||
| #define VIRTIO_NET_F_GUEST_TSO6 (1 << 8) /* guest can rcv TSOv6 */ | |||||
| #define VIRTIO_NET_F_GUEST_ECN (1 << 9) /* guest can rcv TSO with ECN */ | |||||
| #define VIRTIO_NET_F_GUEST_UFO (1 << 10) /* guest can rcv UFO */ | |||||
| #define VIRTIO_NET_F_HOST_TSO4 (1 << 11) /* host can rcv TSOv4 */ | |||||
| #define VIRTIO_NET_F_HOST_TSO6 (1 << 12) /* host can rcv TSOv6 */ | |||||
| #define VIRTIO_NET_F_HOST_ECN (1 << 13) /* host can rcv TSO with ECN */ | |||||
| #define VIRTIO_NET_F_HOST_UFO (1 << 14) /* host can rcv UFO */ | |||||
| #define VIRTIO_NET_F_MRG_RXBUF (1 << 15) /* host can merge RX buffers */ | |||||
| #define VIRTIO_NET_F_STATUS (1 << 16) /* config status field available */ | |||||
| #define VIRTIO_NET_F_CTRL_VQ (1 << 17) /* control channel available */ | |||||
| #define VIRTIO_NET_F_CTRL_RX (1 << 18) /* control channel RX mode support */ | |||||
| #define VIRTIO_NET_F_CTRL_VLAN (1 << 19) /* control channel VLAN filtering */ | |||||
| #define VIRTIO_NET_F_GUEST_ANNOUNCE \ | |||||
| (1 << 21) /* guest can send gratuitous pkts */ | |||||
| #define VIRTIO_NET_F_MQ (1 << 22) /* host supports multiple VQ pairs */ | |||||
| /* | |||||
| * Fixed network header size | |||||
| */ | |||||
| struct virtio_net_rxhdr { | |||||
| uint8_t vrh_flags; | |||||
| uint8_t vrh_gso_type; | |||||
| uint16_t vrh_hdr_len; | |||||
| uint16_t vrh_gso_size; | |||||
| uint16_t vrh_csum_start; | |||||
| uint16_t vrh_csum_offset; | |||||
| uint16_t vrh_bufs; | |||||
| } __packed; | |||||
| #endif /* __NET_BACKENDS_H__ */ | |||||