Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/shaggy...
[linux-2.6] / drivers / char / drm / r128_ioc32.c
1 /**
2  * \file r128_ioc32.c
3  *
4  * 32-bit ioctl compatibility routines for the R128 DRM.
5  *
6  * \author Dave Airlie <airlied@linux.ie> with code from patches by Egbert Eich
7  *
8  * Copyright (C) Paul Mackerras 2005
9  * Copyright (C) Egbert Eich 2003,2004
10  * Copyright (C) Dave Airlie 2005
11  * All Rights Reserved.
12  *
13  * Permission is hereby granted, free of charge, to any person obtaining a
14  * copy of this software and associated documentation files (the "Software"),
15  * to deal in the Software without restriction, including without limitation
16  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
17  * and/or sell copies of the Software, and to permit persons to whom the
18  * Software is furnished to do so, subject to the following conditions:
19  *
20  * The above copyright notice and this permission notice (including the next
21  * paragraph) shall be included in all copies or substantial portions of the
22  * Software.
23  *
24  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
25  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
26  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
27  * THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
28  * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
29  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
30  * IN THE SOFTWARE.
31  */
32 #include <linux/compat.h>
33
34 #include "drmP.h"
35 #include "drm.h"
36 #include "r128_drm.h"
37
38 typedef struct drm_r128_init32 {
39         int func;
40         unsigned int sarea_priv_offset;
41         int is_pci;
42         int cce_mode;
43         int cce_secure;
44         int ring_size;
45         int usec_timeout;
46
47         unsigned int fb_bpp;
48         unsigned int front_offset, front_pitch;
49         unsigned int back_offset, back_pitch;
50         unsigned int depth_bpp;
51         unsigned int depth_offset, depth_pitch;
52         unsigned int span_offset;
53
54         unsigned int fb_offset;
55         unsigned int mmio_offset;
56         unsigned int ring_offset;
57         unsigned int ring_rptr_offset;
58         unsigned int buffers_offset;
59         unsigned int agp_textures_offset;
60 } drm_r128_init32_t;
61
62 static int compat_r128_init(struct file *file, unsigned int cmd,
63                             unsigned long arg)
64 {
65         drm_r128_init32_t init32;
66         drm_r128_init_t __user *init;
67
68         if (copy_from_user(&init32, (void __user *)arg, sizeof(init32)))
69                 return -EFAULT;
70
71         init = compat_alloc_user_space(sizeof(*init));
72         if (!access_ok(VERIFY_WRITE, init, sizeof(*init))
73             || __put_user(init32.func, &init->func)
74             || __put_user(init32.sarea_priv_offset, &init->sarea_priv_offset)
75             || __put_user(init32.is_pci, &init->is_pci)
76             || __put_user(init32.cce_mode, &init->cce_mode)
77             || __put_user(init32.cce_secure, &init->cce_secure)
78             || __put_user(init32.ring_size, &init->ring_size)
79             || __put_user(init32.usec_timeout, &init->usec_timeout)
80             || __put_user(init32.fb_bpp, &init->fb_bpp)
81             || __put_user(init32.front_offset, &init->front_offset)
82             || __put_user(init32.front_pitch, &init->front_pitch)
83             || __put_user(init32.back_offset, &init->back_offset)
84             || __put_user(init32.back_pitch, &init->back_pitch)
85             || __put_user(init32.depth_bpp, &init->depth_bpp)
86             || __put_user(init32.depth_offset, &init->depth_offset)
87             || __put_user(init32.depth_pitch, &init->depth_pitch)
88             || __put_user(init32.span_offset, &init->span_offset)
89             || __put_user(init32.fb_offset, &init->fb_offset)
90             || __put_user(init32.mmio_offset, &init->mmio_offset)
91             || __put_user(init32.ring_offset, &init->ring_offset)
92             || __put_user(init32.ring_rptr_offset, &init->ring_rptr_offset)
93             || __put_user(init32.buffers_offset, &init->buffers_offset)
94             || __put_user(init32.agp_textures_offset,
95                           &init->agp_textures_offset))
96                 return -EFAULT;
97
98         return drm_ioctl(file->f_path.dentry->d_inode, file,
99                          DRM_IOCTL_R128_INIT, (unsigned long)init);
100 }
101
102 typedef struct drm_r128_depth32 {
103         int func;
104         int n;
105         u32 x;
106         u32 y;
107         u32 buffer;
108         u32 mask;
109 } drm_r128_depth32_t;
110
111 static int compat_r128_depth(struct file *file, unsigned int cmd,
112                              unsigned long arg)
113 {
114         drm_r128_depth32_t depth32;
115         drm_r128_depth_t __user *depth;
116
117         if (copy_from_user(&depth32, (void __user *)arg, sizeof(depth32)))
118                 return -EFAULT;
119
120         depth = compat_alloc_user_space(sizeof(*depth));
121         if (!access_ok(VERIFY_WRITE, depth, sizeof(*depth))
122             || __put_user(depth32.func, &depth->func)
123             || __put_user(depth32.n, &depth->n)
124             || __put_user((int __user *)(unsigned long)depth32.x, &depth->x)
125             || __put_user((int __user *)(unsigned long)depth32.y, &depth->y)
126             || __put_user((unsigned int __user *)(unsigned long)depth32.buffer,
127                           &depth->buffer)
128             || __put_user((unsigned char __user *)(unsigned long)depth32.mask,
129                           &depth->mask))
130                 return -EFAULT;
131
132         return drm_ioctl(file->f_path.dentry->d_inode, file,
133                          DRM_IOCTL_R128_DEPTH, (unsigned long)depth);
134
135 }
136
137 typedef struct drm_r128_stipple32 {
138         u32 mask;
139 } drm_r128_stipple32_t;
140
141 static int compat_r128_stipple(struct file *file, unsigned int cmd,
142                                unsigned long arg)
143 {
144         drm_r128_stipple32_t stipple32;
145         drm_r128_stipple_t __user *stipple;
146
147         if (copy_from_user(&stipple32, (void __user *)arg, sizeof(stipple32)))
148                 return -EFAULT;
149
150         stipple = compat_alloc_user_space(sizeof(*stipple));
151         if (!access_ok(VERIFY_WRITE, stipple, sizeof(*stipple))
152             || __put_user((unsigned int __user *)(unsigned long)stipple32.mask,
153                           &stipple->mask))
154                 return -EFAULT;
155
156         return drm_ioctl(file->f_path.dentry->d_inode, file,
157                          DRM_IOCTL_R128_STIPPLE, (unsigned long)stipple);
158 }
159
160 typedef struct drm_r128_getparam32 {
161         int param;
162         u32 value;
163 } drm_r128_getparam32_t;
164
165 static int compat_r128_getparam(struct file *file, unsigned int cmd,
166                                 unsigned long arg)
167 {
168         drm_r128_getparam32_t getparam32;
169         drm_r128_getparam_t __user *getparam;
170
171         if (copy_from_user(&getparam32, (void __user *)arg, sizeof(getparam32)))
172                 return -EFAULT;
173
174         getparam = compat_alloc_user_space(sizeof(*getparam));
175         if (!access_ok(VERIFY_WRITE, getparam, sizeof(*getparam))
176             || __put_user(getparam32.param, &getparam->param)
177             || __put_user((void __user *)(unsigned long)getparam32.value,
178                           &getparam->value))
179                 return -EFAULT;
180
181         return drm_ioctl(file->f_path.dentry->d_inode, file,
182                          DRM_IOCTL_R128_GETPARAM, (unsigned long)getparam);
183 }
184
185 drm_ioctl_compat_t *r128_compat_ioctls[] = {
186         [DRM_R128_INIT] = compat_r128_init,
187         [DRM_R128_DEPTH] = compat_r128_depth,
188         [DRM_R128_STIPPLE] = compat_r128_stipple,
189         [DRM_R128_GETPARAM] = compat_r128_getparam,
190 };
191
192 /**
193  * Called whenever a 32-bit process running under a 64-bit kernel
194  * performs an ioctl on /dev/dri/card<n>.
195  *
196  * \param filp file pointer.
197  * \param cmd command.
198  * \param arg user argument.
199  * \return zero on success or negative number on failure.
200  */
201 long r128_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
202 {
203         unsigned int nr = DRM_IOCTL_NR(cmd);
204         drm_ioctl_compat_t *fn = NULL;
205         int ret;
206
207         if (nr < DRM_COMMAND_BASE)
208                 return drm_compat_ioctl(filp, cmd, arg);
209
210         if (nr < DRM_COMMAND_BASE + DRM_ARRAY_SIZE(r128_compat_ioctls))
211                 fn = r128_compat_ioctls[nr - DRM_COMMAND_BASE];
212
213         lock_kernel();          /* XXX for now */
214         if (fn != NULL)
215                 ret = (*fn) (filp, cmd, arg);
216         else
217                 ret = drm_ioctl(filp->f_path.dentry->d_inode, filp, cmd, arg);
218         unlock_kernel();
219
220         return ret;
221 }