Commit | Line | Data |
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cc329095 | 1 | /* |
8ca7c1df DA |
2 | * 32-bit ioctl compatibility routines for the i915 DRM. |
3 | * | |
8ca7c1df DA |
4 | * Copyright (C) Paul Mackerras 2005 |
5 | * Copyright (C) Alan Hourihane 2005 | |
6 | * All Rights Reserved. | |
7 | * | |
8 | * Permission is hereby granted, free of charge, to any person obtaining a | |
9 | * copy of this software and associated documentation files (the "Software"), | |
10 | * to deal in the Software without restriction, including without limitation | |
11 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
12 | * and/or sell copies of the Software, and to permit persons to whom the | |
13 | * Software is furnished to do so, subject to the following conditions: | |
14 | * | |
15 | * The above copyright notice and this permission notice (including the next | |
16 | * paragraph) shall be included in all copies or substantial portions of the | |
17 | * Software. | |
18 | * | |
19 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
20 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
21 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
22 | * THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, | |
23 | * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
24 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS | |
25 | * IN THE SOFTWARE. | |
cc329095 CW |
26 | * |
27 | * Author: Alan Hourihane <alanh@fairlite.demon.co.uk> | |
8ca7c1df DA |
28 | */ |
29 | #include <linux/compat.h> | |
8ca7c1df | 30 | |
fcd70cd3 | 31 | #include <drm/drm_ioctl.h> |
062705be | 32 | |
c43b5634 | 33 | #include "i915_drv.h" |
2564c35d | 34 | #include "i915_getparam.h" |
062705be | 35 | #include "i915_ioc32.h" |
8ca7c1df | 36 | |
346add78 DV |
37 | struct drm_i915_getparam32 { |
38 | s32 param; | |
39 | /* | |
40 | * We screwed up the generic ioctl struct here and used a variable-sized | |
41 | * pointer. Use u32 in the compat struct to match the 32bit pointer | |
42 | * userspace expects. | |
43 | */ | |
8ca7c1df | 44 | u32 value; |
346add78 | 45 | }; |
8ca7c1df DA |
46 | |
47 | static int compat_i915_getparam(struct file *file, unsigned int cmd, | |
b5e89ed5 | 48 | unsigned long arg) |
8ca7c1df | 49 | { |
346add78 | 50 | struct drm_i915_getparam32 req32; |
fd7cd8da | 51 | struct drm_i915_getparam req; |
8ca7c1df | 52 | |
b5e89ed5 | 53 | if (copy_from_user(&req32, (void __user *)arg, sizeof(req32))) |
8ca7c1df DA |
54 | return -EFAULT; |
55 | ||
fd7cd8da AV |
56 | req.param = req32.param; |
57 | req.value = compat_ptr(req32.value); | |
8ca7c1df | 58 | |
fd7cd8da AV |
59 | return drm_ioctl_kernel(file, i915_getparam_ioctl, &req, |
60 | DRM_RENDER_ALLOW); | |
8ca7c1df DA |
61 | } |
62 | ||
c43b5634 | 63 | static drm_ioctl_compat_t *i915_compat_ioctls[] = { |
8ca7c1df | 64 | [DRM_I915_GETPARAM] = compat_i915_getparam, |
8ca7c1df DA |
65 | }; |
66 | ||
67 | /** | |
062705be | 68 | * i915_ioc32_compat_ioctl - handle the mistakes of the past |
cc329095 CW |
69 | * @filp: the file pointer |
70 | * @cmd: the ioctl command (and encoded flags) | |
71 | * @arg: the ioctl argument (from userspace) | |
72 | * | |
8ca7c1df DA |
73 | * Called whenever a 32-bit process running under a 64-bit kernel |
74 | * performs an ioctl on /dev/dri/card<n>. | |
8ca7c1df | 75 | */ |
062705be | 76 | long i915_ioc32_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) |
8ca7c1df DA |
77 | { |
78 | unsigned int nr = DRM_IOCTL_NR(cmd); | |
79 | drm_ioctl_compat_t *fn = NULL; | |
80 | int ret; | |
81 | ||
ac7e7ab1 | 82 | if (nr < DRM_COMMAND_BASE || nr >= DRM_COMMAND_END) |
8ca7c1df | 83 | return drm_compat_ioctl(filp, cmd, arg); |
b5e89ed5 | 84 | |
f95aeb17 | 85 | if (nr < DRM_COMMAND_BASE + ARRAY_SIZE(i915_compat_ioctls)) |
8ca7c1df DA |
86 | fn = i915_compat_ioctls[nr - DRM_COMMAND_BASE]; |
87 | ||
8ca7c1df | 88 | if (fn != NULL) |
b5e89ed5 | 89 | ret = (*fn) (filp, cmd, arg); |
8ca7c1df | 90 | else |
ed8b6704 | 91 | ret = drm_ioctl(filp, cmd, arg); |
8ca7c1df DA |
92 | |
93 | return ret; | |
94 | } |