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