tdfx_linux.c revision 280258 
1/*-
2 * Copyright (c) 2006 The FreeBSD Project
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
28__FBSDID("$FreeBSD: stable/10/sys/dev/tdfx/tdfx_linux.c 280258 2015-03-19 13:37:36Z rwatson $");
29
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
40LINUX_IOCTL_SET(tdfx, LINUX_IOCTL_TDFX_MIN, LINUX_IOCTL_TDFX_MAX);
41
42/*
43 * Linux emulation IOCTL for /dev/tdfx
44 */
45static int
46linux_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(&rights, CAP_IOCTL), &fp);
59   if (error != 0)
60	   return (error);
61   /* We simply copy the data and send it right to ioctl */
62   copyin((caddr_t)args->arg, &d_pio, sizeof(d_pio));
63   error = fo_ioctl(fp, cmd, (caddr_t)&d_pio, td->td_ucred, td);
64   fdrop(fp, td);
65   return error;
66}
67
68static int
69tdfx_linux_modevent(struct module *mod __unused, int what, void *arg __unused)
70{
71
72	switch (what) {
73	case MOD_LOAD:
74	case MOD_UNLOAD:
75		return (0);
76	}
77	return (EOPNOTSUPP);
78}
79
80static moduledata_t tdfx_linux_mod = {
81	"tdfx_linux",
82	tdfx_linux_modevent,
83	0
84};
85
86/* As in SYSCALL_MODULE */
87DECLARE_MODULE(tdfx_linux, tdfx_linux_mod, SI_SUB_DRIVERS, SI_ORDER_MIDDLE);
88MODULE_VERSION(tdfx_linux, 1);
89MODULE_DEPEND(tdfx_linux, tdfx, 1, 1, 1);
90MODULE_DEPEND(tdfx_linux, linux, 1, 1, 1);
91