1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2006 The FreeBSD Project
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #include <sys/cdefs.h>
30 #include <sys/param.h>
31 #include <sys/capsicum.h>
32 #include <sys/file.h>
33 #include <sys/kernel.h>
34 #include <sys/module.h>
35 #include <sys/proc.h>
36 #include <sys/systm.h>
37
38 #include <dev/tdfx/tdfx_linux.h>
39
40 LINUX_IOCTL_SET(tdfx, LINUX_IOCTL_TDFX_MIN, LINUX_IOCTL_TDFX_MAX);
41
42 /*
43 * Linux emulation IOCTL for /dev/tdfx
44 */
45 static int
linux_ioctl_tdfx(struct thread * td,struct linux_ioctl_args * args)46 linux_ioctl_tdfx(struct thread *td, struct linux_ioctl_args* args)
47 {
48 cap_rights_t rights;
49 int error = 0;
50 u_long cmd = args->cmd & 0xffff;
51
52 /* The structure passed to ioctl has two shorts, one int
53 and one void*. */
54 char d_pio[2*sizeof(short) + sizeof(int) + sizeof(void*)];
55
56 struct file *fp;
57
58 error = fget(td, args->fd, cap_rights_init_one(&rights, CAP_IOCTL), &fp);
59 if (error != 0)
60 return (error);
61 /* We simply copy the data and send it right to ioctl */
62 error = copyin((caddr_t)args->arg, &d_pio, sizeof(d_pio));
63 if (error == 0)
64 error = fo_ioctl(fp, cmd, (caddr_t)&d_pio, td->td_ucred, td);
65 fdrop(fp, td);
66 return error;
67 }
68
69 static int
tdfx_linux_modevent(struct module * mod __unused,int what,void * arg __unused)70 tdfx_linux_modevent(struct module *mod __unused, int what, void *arg __unused)
71 {
72
73 switch (what) {
74 case MOD_LOAD:
75 case MOD_UNLOAD:
76 return (0);
77 }
78 return (EOPNOTSUPP);
79 }
80
81 static moduledata_t tdfx_linux_mod = {
82 "tdfx_linux",
83 tdfx_linux_modevent,
84 0
85 };
86
87 /* As in SYSCALL_MODULE */
88 DECLARE_MODULE(tdfx_linux, tdfx_linux_mod, SI_SUB_DRIVERS, SI_ORDER_MIDDLE);
89 MODULE_VERSION(tdfx_linux, 1);
90 MODULE_DEPEND(tdfx_linux, tdfx, 1, 1, 1);
91 MODULE_DEPEND(tdfx_linux, linux, 1, 1, 1);
92