xref: /freebsd/sys/dev/virtio/virtio_bus_if.m (revision 7750ad47a9a7dbc83f87158464170c8640723293) 
1#-
2# Copyright (c) 2011, Bryan Venteicher <bryanv@daemoninthecloset.org>
3# All rights reserved.
4#
5# Redistribution and use in source and binary forms, with or without
6# modification, are permitted provided that the following conditions
7# are met:
8# 1. Redistributions of source code must retain the above copyright
9#    notice, this list of conditions and the following disclaimer.
10# 2. Redistributions in binary form must reproduce the above copyright
11#    notice, this list of conditions and the following disclaimer in the
12#    documentation and/or other materials provided with the distribution.
13#
14# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24# SUCH DAMAGE.
25#
26# $FreeBSD$
27
28#include <sys/bus.h>
29#include <machine/bus.h>
30
31INTERFACE virtio_bus;
32
33HEADER {
34struct vq_alloc_info;
35};
36
37METHOD uint64_t negotiate_features {
38	device_t	dev;
39	uint64_t	child_features;
40};
41
42METHOD int with_feature {
43	device_t	dev;
44	uint64_t	feature;
45};
46
47METHOD int alloc_virtqueues {
48	device_t	dev;
49	int		flags;
50	int		nvqs;
51	struct vq_alloc_info *info;
52};
53HEADER {
54#define VIRTIO_ALLOC_VQS_DISABLE_MSIX 0x1
55};
56
57METHOD int setup_intr {
58	device_t	dev;
59	enum intr_type	type;
60};
61
62METHOD void stop {
63	device_t	dev;
64};
65
66METHOD int reinit {
67	device_t	dev;
68	uint64_t	features;
69};
70
71METHOD void reinit_complete {
72	device_t	dev;
73};
74
75METHOD void notify_vq {
76	device_t	dev;
77	uint16_t	queue;
78};
79
80METHOD void read_device_config {
81	device_t	dev;
82	bus_size_t	offset;
83	void		*dst;
84	int		len;
85};
86
87METHOD void write_device_config {
88	device_t	dev;
89	bus_size_t	offset;
90	void		*src;
91	int		len;
92};
93