xref: /freebsd/sys/dev/virtio/virtio_bus_if.m (revision eda14cbc264d6969b02f2b1994cef11148e914f1) 
1#-
2# Copyright (c) 2011, Bryan Venteicher <bryanv@FreeBSD.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
37CODE {
38	static int
39	virtio_bus_default_config_generation(device_t dev)
40	{
41		return (0);
42	}
43};
44
45METHOD uint64_t negotiate_features {
46	device_t	dev;
47	uint64_t	child_features;
48};
49
50METHOD int with_feature {
51	device_t	dev;
52	uint64_t	feature;
53};
54
55METHOD int alloc_virtqueues {
56	device_t	dev;
57	int		flags;
58	int		nvqs;
59	struct vq_alloc_info *info;
60};
61
62METHOD int setup_intr {
63	device_t	dev;
64	enum intr_type	type;
65};
66
67METHOD void stop {
68	device_t	dev;
69};
70
71METHOD int reinit {
72	device_t	dev;
73	uint64_t	features;
74};
75
76METHOD void reinit_complete {
77	device_t	dev;
78};
79
80METHOD void notify_vq {
81	device_t	dev;
82	uint16_t	queue;
83};
84
85METHOD int config_generation {
86	device_t	dev;
87} DEFAULT virtio_bus_default_config_generation;
88
89METHOD void read_device_config {
90	device_t	dev;
91	bus_size_t	offset;
92	void		*dst;
93	int		len;
94};
95
96METHOD void write_device_config {
97	device_t	dev;
98	bus_size_t	offset;
99	void		*src;
100	int		len;
101};
102
103METHOD void poll {
104	device_t	dev;
105};
106
107