1/*	$NetBSD: nouveau_ioc32.c,v 1.3 2021/12/18 23:45:32 riastradh Exp $	*/
2
3/**
4 * \file mga_ioc32.c
5 *
6 * 32-bit ioctl compatibility routines for the MGA DRM.
7 *
8 * \author Dave Airlie <airlied@linux.ie> with code from patches by Egbert Eich
9 *
10 *
11 * Copyright (C) Paul Mackerras 2005
12 * Copyright (C) Egbert Eich 2003,2004
13 * Copyright (C) Dave Airlie 2005
14 * All Rights Reserved.
15 *
16 * Permission is hereby granted, free of charge, to any person obtaining a
17 * copy of this software and associated documentation files (the "Software"),
18 * to deal in the Software without restriction, including without limitation
19 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
20 * and/or sell copies of the Software, and to permit persons to whom the
21 * Software is furnished to do so, subject to the following conditions:
22 *
23 * The above copyright notice and this permission notice (including the next
24 * paragraph) shall be included in all copies or substantial portions of the
25 * Software.
26 *
27 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
28 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
29 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
30 * THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
31 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
32 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
33 * IN THE SOFTWARE.
34 */
35
36#include <sys/cdefs.h>
37__KERNEL_RCSID(0, "$NetBSD: nouveau_ioc32.c,v 1.3 2021/12/18 23:45:32 riastradh Exp $");
38
39#include <linux/compat.h>
40
41#include <drm/drm.h>
42#include <drm/drm_ioctl.h>
43
44#include "nouveau_ioctl.h"
45
46/**
47 * Called whenever a 32-bit process running under a 64-bit kernel
48 * performs an ioctl on /dev/dri/card<n>.
49 *
50 * \param filp file pointer.
51 * \param cmd command.
52 * \param arg user argument.
53 * \return zero on success or negative number on failure.
54 */
55long nouveau_compat_ioctl(struct file *filp, unsigned int cmd,
56			 unsigned long arg)
57{
58	unsigned int nr = DRM_IOCTL_NR(cmd);
59	drm_ioctl_compat_t *fn = NULL;
60	int ret;
61
62	if (nr < DRM_COMMAND_BASE)
63		return drm_compat_ioctl(filp, cmd, arg);
64
65#if 0
66	if (nr < DRM_COMMAND_BASE + ARRAY_SIZE(mga_compat_ioctls))
67		fn = nouveau_compat_ioctls[nr - DRM_COMMAND_BASE];
68#endif
69	if (fn != NULL)
70		ret = (*fn)(filp, cmd, arg);
71	else
72		ret = nouveau_drm_ioctl(filp, cmd, arg);
73
74	return ret;
75}
76