Merge branch 'srp' of master.kernel.org:/pub/scm/linux/kernel/git/roland/infiniband
[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 #include <linux/ioctl32.h>
34
35 #include "drmP.h"
36 #include "drm.h"
37 #include "r128_drm.h"
38
39 typedef struct drm_r128_init32 {
40         int func;
41         unsigned int sarea_priv_offset;
42         int is_pci;
43         int cce_mode;
44         int cce_secure;
45         int ring_size;
46         int usec_timeout;
47
48         unsigned int fb_bpp;
49         unsigned int front_offset, front_pitch;
50         unsigned int back_offset, back_pitch;
51         unsigned int depth_bpp;
52         unsigned int depth_offset, depth_pitch;
53         unsigned int span_offset;
54
55         unsigned int fb_offset;
56         unsigned int mmio_offset;
57         unsigned int ring_offset;
58         unsigned int ring_rptr_offset;
59         unsigned int buffers_offset;
60         unsigned int agp_textures_offset;
61 } drm_r128_init32_t;
62
63 static int compat_r128_init(struct file *file, unsigned int cmd,
64                             unsigned long arg)
65 {
66         drm_r128_init32_t init32;
67         drm_r128_init_t __user *init;
68
69         if (copy_from_user(&init32, (void __user *)arg, sizeof(init32)))
70                 return -EFAULT;
71
72         init = compat_alloc_user_space(sizeof(*init));
73         if (!access_ok(VERIFY_WRITE, init, sizeof(*init))
74             || __put_user(init32.func, &init->func)
75             || __put_user(init32.sarea_priv_offset, &init->sarea_priv_offset)
76             || __put_user(init32.is_pci, &init->is_pci)
77             || __put_user(init32.cce_mode, &init->cce_mode)
78             || __put_user(init32.cce_secure, &init->cce_secure)
79             || __put_user(init32.ring_size, &init->ring_size)
80             || __put_user(init32.usec_timeout, &init->usec_timeout)
81             || __put_user(init32.fb_bpp, &init->fb_bpp)
82             || __put_user(init32.front_offset, &init->front_offset)
83             || __put_user(init32.front_pitch, &init->front_pitch)
84             || __put_user(init32.back_offset, &init->back_offset)
85             || __put_user(init32.back_pitch, &init->back_pitch)
86             || __put_user(init32.depth_bpp, &init->depth_bpp)
87             || __put_user(init32.depth_offset, &init->depth_offset)
88             || __put_user(init32.depth_pitch, &init->depth_pitch)
89             || __put_user(init32.span_offset, &init->span_offset)
90             || __put_user(init32.fb_offset, &init->fb_offset)
91             || __put_user(init32.mmio_offset, &init->mmio_offset)
92             || __put_user(init32.ring_offset, &init->ring_offset)
93             || __put_user(init32.ring_rptr_offset, &init->ring_rptr_offset)
94             || __put_user(init32.buffers_offset, &init->buffers_offset)
95             || __put_user(init32.agp_textures_offset,
96                           &init->agp_textures_offset))
97                 return -EFAULT;
98
99         return drm_ioctl(file->f_dentry->d_inode, file,
100                          DRM_IOCTL_R128_INIT, (unsigned long)init);
101 }
102
103 typedef struct drm_r128_depth32 {
104         int func;
105         int n;
106         u32 x;
107         u32 y;
108         u32 buffer;
109         u32 mask;
110 } drm_r128_depth32_t;
111
112 static int compat_r128_depth(struct file *file, unsigned int cmd,
113                              unsigned long arg)
114 {
115         drm_r128_depth32_t depth32;
116         drm_r128_depth_t __user *depth;
117
118         if (copy_from_user(&depth32, (void __user *)arg, sizeof(depth32)))
119                 return -EFAULT;
120
121         depth = compat_alloc_user_space(sizeof(*depth));
122         if (!access_ok(VERIFY_WRITE, depth, sizeof(*depth))
123             || __put_user(depth32.func, &depth->func)
124             || __put_user(depth32.n, &depth->n)
125             || __put_user((int __user *)(unsigned long)depth32.x, &depth->x)
126             || __put_user((int __user *)(unsigned long)depth32.y, &depth->y)
127             || __put_user((unsigned int __user *)(unsigned long)depth32.buffer,
128                           &depth->buffer)
129             || __put_user((unsigned char __user *)(unsigned long)depth32.mask,
130                           &depth->mask))
131                 return -EFAULT;
132
133         return drm_ioctl(file->f_dentry->d_inode, file,
134                          DRM_IOCTL_R128_DEPTH, (unsigned long)depth);
135
136 }
137
138 typedef struct drm_r128_stipple32 {
139         u32 mask;
140 } drm_r128_stipple32_t;
141
142 static int compat_r128_stipple(struct file *file, unsigned int cmd,
143                                unsigned long arg)
144 {
145         drm_r128_stipple32_t stipple32;
146         drm_r128_stipple_t __user *stipple;
147
148         if (copy_from_user(&stipple32, (void __user *)arg, sizeof(stipple32)))
149                 return -EFAULT;
150
151         stipple = compat_alloc_user_space(sizeof(*stipple));
152         if (!access_ok(VERIFY_WRITE, stipple, sizeof(*stipple))
153             || __put_user((unsigned int __user *)(unsigned long)stipple32.mask,
154                           &stipple->mask))
155                 return -EFAULT;
156
157         return drm_ioctl(file->f_dentry->d_inode, file,
158                          DRM_IOCTL_R128_STIPPLE, (unsigned long)stipple);
159 }
160
161 typedef struct drm_r128_getparam32 {
162         int param;
163         u32 value;
164 } drm_r128_getparam32_t;
165
166 static int compat_r128_getparam(struct file *file, unsigned int cmd,
167                                 unsigned long arg)
168 {
169         drm_r128_getparam32_t getparam32;
170         drm_r128_getparam_t __user *getparam;
171
172         if (copy_from_user(&getparam32, (void __user *)arg, sizeof(getparam32)))
173                 return -EFAULT;
174
175         getparam = compat_alloc_user_space(sizeof(*getparam));
176         if (!access_ok(VERIFY_WRITE, getparam, sizeof(*getparam))
177             || __put_user(getparam32.param, &getparam->param)
178             || __put_user((void __user *)(unsigned long)getparam32.value,
179                           &getparam->value))
180                 return -EFAULT;
181
182         return drm_ioctl(file->f_dentry->d_inode, file,
183                          DRM_IOCTL_R128_GETPARAM, (unsigned long)getparam);
184 }
185
186 drm_ioctl_compat_t *r128_compat_ioctls[] = {
187         [DRM_R128_INIT] = compat_r128_init,
188         [DRM_R128_DEPTH] = compat_r128_depth,
189         [DRM_R128_STIPPLE] = compat_r128_stipple,
190         [DRM_R128_GETPARAM] = compat_r128_getparam,
191 };
192
193 /**
194  * Called whenever a 32-bit process running under a 64-bit kernel
195  * performs an ioctl on /dev/dri/card<n>.
196  *
197  * \param filp file pointer.
198  * \param cmd command.
199  * \param arg user argument.
200  * \return zero on success or negative number on failure.
201  */
202 long r128_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
203 {
204         unsigned int nr = DRM_IOCTL_NR(cmd);
205         drm_ioctl_compat_t *fn = NULL;
206         int ret;
207
208         if (nr < DRM_COMMAND_BASE)
209                 return drm_compat_ioctl(filp, cmd, arg);
210
211         if (nr < DRM_COMMAND_BASE + DRM_ARRAY_SIZE(r128_compat_ioctls))
212                 fn = r128_compat_ioctls[nr - DRM_COMMAND_BASE];
213
214         lock_kernel();          /* XXX for now */
215         if (fn != NULL)
216                 ret = (*fn) (filp, cmd, arg);
217         else
218                 ret = drm_ioctl(filp->f_dentry->d_inode, filp, cmd, arg);
219         unlock_kernel();
220
221         return ret;
222 }