xref: /titanic_50/usr/src/uts/common/xen/sys/evtchn.h (revision 0b5ce10aee80822ecc7df77df92a5e24078ba196)
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 
30 /*
31  * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
32  * Use is subject to license terms.
33  */
34 
35 #ifndef _XEN_SYS_EVTCHN_H
36 #define _XEN_SYS_EVTCHN_H
37 
38 #pragma ident	"%Z%%M%	%I%	%E% SMI"
39 
40 #define	_IOC_NONE	0
41 #define	_IOC(flag, letter, inum, size)	((letter) << 8 | (inum))
42 
43 /*
44  * Bind a fresh port to VIRQ @virq.
45  * Return allocated port.
46  */
47 #define IOCTL_EVTCHN_BIND_VIRQ				\
48 	_IOC(_IOC_NONE, 'E', 0, sizeof(struct ioctl_evtchn_bind_virq))
49 struct ioctl_evtchn_bind_virq {
50 	unsigned int virq;
51 };
52 
53 /*
54  * Bind a fresh port to remote <@remote_domain, @remote_port>.
55  * Return allocated port.
56  */
57 #define IOCTL_EVTCHN_BIND_INTERDOMAIN			\
58 	_IOC(_IOC_NONE, 'E', 1, sizeof(struct ioctl_evtchn_bind_interdomain))
59 struct ioctl_evtchn_bind_interdomain {
60 	unsigned int remote_domain, remote_port;
61 };
62 
63 /*
64  * Allocate a fresh port for binding to @remote_domain.
65  * Return allocated port.
66  */
67 #define IOCTL_EVTCHN_BIND_UNBOUND_PORT                  \
68         _IOC(_IOC_NONE, 'E', 2, sizeof(struct ioctl_evtchn_bind_unbound_port))
69 struct ioctl_evtchn_bind_unbound_port {
70         unsigned int remote_domain;
71 };
72 
73 /*
74  * Unbind previously allocated @port.
75  */
76 #define IOCTL_EVTCHN_UNBIND				\
77 	_IOC(_IOC_NONE, 'E', 3, sizeof(struct ioctl_evtchn_unbind))
78 struct ioctl_evtchn_unbind {
79 	unsigned int port;
80 };
81 
82 /*
83  * Notify the given @port.
84  */
85 #define IOCTL_EVTCHN_NOTIFY				\
86 	_IOC(_IOC_NONE, 'E', 4, sizeof(struct ioctl_evtchn_notify))
87 struct ioctl_evtchn_notify {
88 	unsigned int port;
89 };
90 
91 #endif /* _XEN_SYS_EVTCHN_H */
92 
93 /*
94  * Local variables:
95  *  c-file-style: "solaris"
96  *  indent-tabs-mode: t
97  *  c-indent-level: 8
98  *  c-basic-offset: 8
99  *  tab-width: 8
100  * End:
101  */
102