1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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 __FBSDID("$FreeBSD: releng/12.0/sys/dev/tdfx/tdfx_linux.c 326255 2017-11-27 14:52:40Z pfg $");
31
32 #include <sys/param.h>
33 #include <sys/capsicum.h>
34 #include <sys/file.h>
35 #include <sys/kernel.h>
36 #include <sys/module.h>
37 #include <sys/proc.h>
38 #include <sys/systm.h>
39
40 #include <dev/tdfx/tdfx_linux.h>
41
42 LINUX_IOCTL_SET(tdfx, LINUX_IOCTL_TDFX_MIN, LINUX_IOCTL_TDFX_MAX);
43
44 /*
45 * Linux emulation IOCTL for /dev/tdfx
46 */
47 static int
48 linux_ioctl_tdfx(struct thread *td, struct linux_ioctl_args* args)
49 {
50 cap_rights_t rights;
51 int error = 0;
52 u_long cmd = args->cmd & 0xffff;
53
54 /* The structure passed to ioctl has two shorts, one int
55 and one void*. */
56 char d_pio[2*sizeof(short) + sizeof(int) + sizeof(void*)];
57
58 struct file *fp;
59
60 error = fget(td, args->fd, cap_rights_init(&rights, CAP_IOCTL), &fp);
61 if (error != 0)
62 return (error);
63 /* We simply copy the data and send it right to ioctl */
64 copyin((caddr_t)args->arg, &d_pio, sizeof(d_pio));
65 error = fo_ioctl(fp, cmd, (caddr_t)&d_pio, td->td_ucred, td);
66 fdrop(fp, td);
67 return error;
68 }
69
70 static int
71 tdfx_linux_modevent(struct module *mod __unused, int what, void *arg __unused)
72 {
73
74 switch (what) {
75 case MOD_LOAD:
76 case MOD_UNLOAD:
77 return (0);
78 }
79 return (EOPNOTSUPP);
80 }
81
82 static moduledata_t tdfx_linux_mod = {
83 "tdfx_linux",
84 tdfx_linux_modevent,
85 0
86 };
87
88 /* As in SYSCALL_MODULE */
89 DECLARE_MODULE(tdfx_linux, tdfx_linux_mod, SI_SUB_DRIVERS, SI_ORDER_MIDDLE);
90 MODULE_VERSION(tdfx_linux, 1);
91 MODULE_DEPEND(tdfx_linux, tdfx, 1, 1, 1);
92 MODULE_DEPEND(tdfx_linux, linux, 1, 1, 1);
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