1 /******************************************************************************
2  * evtchn.h
3  *
4  * Interface to /dev/xen/evtchn.
5  *
6  * Copyright (c) 2003-2005, K A Fraser
7  *
8  * This file may be distributed separately from the Linux kernel, or
9  * incorporated into other software packages, subject to the following license:
10  *
11  * Permission is hereby granted, free of charge, to any person obtaining a copy
12  * of this source file (the "Software"), to deal in the Software without
13  * restriction, including without limitation the rights to use, copy, modify,
14  * merge, publish, distribute, sublicense, and/or sell copies of the Software,
15  * and to permit persons to whom the Software is furnished to do so, subject to
16  * the following conditions:
17  *
18  * The above copyright notice and this permission notice shall be included in
19  * all copies or substantial portions of the Software.
20  *
21  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
22  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
23  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
24  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
25  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
26  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
27  * IN THE SOFTWARE.
28  *
29  * $FreeBSD$
30  */
31 
32 #ifndef __XEN_EVTCHN_H__
33 #define __XEN_EVTCHN_H__
34 
35 /*
36  * Bind a fresh port to VIRQ @virq.
37  */
38 #define IOCTL_EVTCHN_BIND_VIRQ				\
39 	_IOWR('E', 4, struct ioctl_evtchn_bind_virq)
40 struct ioctl_evtchn_bind_virq {
41 	unsigned int virq;
42 	unsigned int port;
43 };
44 
45 /*
46  * Bind a fresh port to remote <@remote_domain, @remote_port>.
47  */
48 #define IOCTL_EVTCHN_BIND_INTERDOMAIN			\
49 	_IOWR('E', 5, struct ioctl_evtchn_bind_interdomain)
50 struct ioctl_evtchn_bind_interdomain {
51 	unsigned int remote_domain, remote_port;
52 	unsigned int port;
53 };
54 
55 /*
56  * Allocate a fresh port for binding to @remote_domain.
57  */
58 #define IOCTL_EVTCHN_BIND_UNBOUND_PORT			\
59 	_IOWR('E', 6, struct ioctl_evtchn_bind_unbound_port)
60 struct ioctl_evtchn_bind_unbound_port {
61 	unsigned int remote_domain;
62 	unsigned int port;
63 };
64 
65 /*
66  * Unbind previously allocated @port.
67  */
68 #define IOCTL_EVTCHN_UNBIND				\
69 	_IOW('E', 7, struct ioctl_evtchn_unbind)
70 struct ioctl_evtchn_unbind {
71 	unsigned int port;
72 };
73 
74 /*
75  * Send event to previously allocated @port.
76  */
77 #define IOCTL_EVTCHN_NOTIFY				\
78 	_IOW('E', 8, struct ioctl_evtchn_notify)
79 struct ioctl_evtchn_notify {
80 	unsigned int port;
81 };
82 
83 /* Clear and reinitialise the event buffer. Clear error condition. */
84 #define IOCTL_EVTCHN_RESET				\
85 	_IO('E', 9)
86 
87 #endif /* __XEN_EVTCHN_H__ */
88