1 /******************************************************************************
2 *
3 * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
4 * Use is subject to license terms.
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation;
9 * version 2.1 of the License.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; If not, see <http://www.gnu.org/licenses/>.
18 *
19 * Split off from xc_freebsd_osdep.c
20 */
21
22 #include <errno.h>
23 #include <fcntl.h>
24 #include <unistd.h>
25
26 #include <sys/ioctl.h>
27
28 #include <xen/sys/evtchn.h>
29
30 #include "private.h"
31
32 #define EVTCHN_DEV "/dev/xen/evtchn"
33
osdep_evtchn_open(xenevtchn_handle * xce)34 int osdep_evtchn_open(xenevtchn_handle *xce)
35 {
36 int fd = open(EVTCHN_DEV, O_RDWR|O_CLOEXEC);
37 if ( fd == -1 )
38 return -1;
39 xce->fd = fd;
40 return 0;
41 }
42
osdep_evtchn_close(xenevtchn_handle * xce)43 int osdep_evtchn_close(xenevtchn_handle *xce)
44 {
45 if ( xce->fd == -1 )
46 return 0;
47
48 return close(xce->fd);
49 }
50
osdep_evtchn_restrict(xenevtchn_handle * xce,domid_t domid)51 int osdep_evtchn_restrict(xenevtchn_handle *xce, domid_t domid)
52 {
53 errno = -EOPNOTSUPP;
54 return -1;
55 }
56
xenevtchn_fd(xenevtchn_handle * xce)57 int xenevtchn_fd(xenevtchn_handle *xce)
58 {
59 return xce->fd;
60 }
61
xenevtchn_notify(xenevtchn_handle * xce,evtchn_port_t port)62 int xenevtchn_notify(xenevtchn_handle *xce, evtchn_port_t port)
63 {
64 int fd = xce->fd;
65 struct ioctl_evtchn_notify notify;
66
67 notify.port = port;
68
69 return ioctl(fd, IOCTL_EVTCHN_NOTIFY, ¬ify);
70 }
71
xenevtchn_bind_unbound_port(xenevtchn_handle * xce,uint32_t domid)72 xenevtchn_port_or_error_t xenevtchn_bind_unbound_port(xenevtchn_handle *xce, uint32_t domid)
73 {
74 int ret, fd = xce->fd;
75 struct ioctl_evtchn_bind_unbound_port bind;
76
77 bind.remote_domain = domid;
78
79 ret = ioctl(fd, IOCTL_EVTCHN_BIND_UNBOUND_PORT, &bind);
80 return ( ret == 0 ) ? bind.port : ret;
81 }
82
83 xenevtchn_port_or_error_t
xenevtchn_bind_interdomain(xenevtchn_handle * xce,uint32_t domid,evtchn_port_t remote_port)84 xenevtchn_bind_interdomain(xenevtchn_handle *xce, uint32_t domid, evtchn_port_t remote_port)
85 {
86 int ret, fd = xce->fd;
87 struct ioctl_evtchn_bind_interdomain bind;
88
89 bind.remote_domain = domid;
90 bind.remote_port = remote_port;
91
92 ret = ioctl(fd, IOCTL_EVTCHN_BIND_INTERDOMAIN, &bind);
93 return ( ret == 0 ) ? bind.port : ret;
94 }
95
xenevtchn_bind_virq(xenevtchn_handle * xce,unsigned int virq)96 xenevtchn_port_or_error_t xenevtchn_bind_virq(xenevtchn_handle *xce, unsigned int virq)
97 {
98 int ret, fd = xce->fd;
99 struct ioctl_evtchn_bind_virq bind;
100
101 bind.virq = virq;
102
103 ret = ioctl(fd, IOCTL_EVTCHN_BIND_VIRQ, &bind);
104 return ( ret == 0 ) ? bind.port : ret;
105 }
106
xenevtchn_unbind(xenevtchn_handle * xce,evtchn_port_t port)107 int xenevtchn_unbind(xenevtchn_handle *xce, evtchn_port_t port)
108 {
109 int fd = xce->fd;
110 struct ioctl_evtchn_unbind unbind;
111
112 unbind.port = port;
113
114 return ioctl(fd, IOCTL_EVTCHN_UNBIND, &unbind);
115 }
116
xenevtchn_pending(xenevtchn_handle * xce)117 xenevtchn_port_or_error_t xenevtchn_pending(xenevtchn_handle *xce)
118 {
119 int fd = xce->fd;
120 evtchn_port_t port;
121
122 if ( read(fd, &port, sizeof(port)) != sizeof(port) )
123 return -1;
124
125 return port;
126 }
127
xenevtchn_unmask(xenevtchn_handle * xce,evtchn_port_t port)128 int xenevtchn_unmask(xenevtchn_handle *xce, evtchn_port_t port)
129 {
130 int fd = xce->fd;
131
132 if ( write(fd, &port, sizeof(port)) != sizeof(port) )
133 return -1;
134 return 0;
135 }
136
137 /*
138 * Local variables:
139 * mode: C
140 * c-file-style: "BSD"
141 * c-basic-offset: 4
142 * tab-width: 4
143 * indent-tabs-mode: nil
144 * End:
145 */
146