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[~andy/linux] / drivers / gpu / drm / r128 / 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 <drm/drmP.h>
35 #include <drm/r128_drm.h>
36
37 typedef struct drm_r128_init32 {
38         int func;
39         unsigned int sarea_priv_offset;
40         int is_pci;
41         int cce_mode;
42         int cce_secure;
43         int ring_size;
44         int usec_timeout;
45
46         unsigned int fb_bpp;
47         unsigned int front_offset, front_pitch;
48         unsigned int back_offset, back_pitch;
49         unsigned int depth_bpp;
50         unsigned int depth_offset, depth_pitch;
51         unsigned int span_offset;
52
53         unsigned int fb_offset;
54         unsigned int mmio_offset;
55         unsigned int ring_offset;
56         unsigned int ring_rptr_offset;
57         unsigned int buffers_offset;
58         unsigned int agp_textures_offset;
59 } drm_r128_init32_t;
60
61 static int compat_r128_init(struct file *file, unsigned int cmd,
62                             unsigned long arg)
63 {
64         drm_r128_init32_t init32;
65         drm_r128_init_t __user *init;
66
67         if (copy_from_user(&init32, (void __user *)arg, sizeof(init32)))
68                 return -EFAULT;
69
70         init = compat_alloc_user_space(sizeof(*init));
71         if (!access_ok(VERIFY_WRITE, init, sizeof(*init))
72             || __put_user(init32.func, &init->func)
73             || __put_user(init32.sarea_priv_offset, &init->sarea_priv_offset)
74             || __put_user(init32.is_pci, &init->is_pci)
75             || __put_user(init32.cce_mode, &init->cce_mode)
76             || __put_user(init32.cce_secure, &init->cce_secure)
77             || __put_user(init32.ring_size, &init->ring_size)
78             || __put_user(init32.usec_timeout, &init->usec_timeout)
79             || __put_user(init32.fb_bpp, &init->fb_bpp)
80             || __put_user(init32.front_offset, &init->front_offset)
81             || __put_user(init32.front_pitch, &init->front_pitch)
82             || __put_user(init32.back_offset, &init->back_offset)
83             || __put_user(init32.back_pitch, &init->back_pitch)
84             || __put_user(init32.depth_bpp, &init->depth_bpp)
85             || __put_user(init32.depth_offset, &init->depth_offset)
86             || __put_user(init32.depth_pitch, &init->depth_pitch)
87             || __put_user(init32.span_offset, &init->span_offset)
88             || __put_user(init32.fb_offset, &init->fb_offset)
89             || __put_user(init32.mmio_offset, &init->mmio_offset)
90             || __put_user(init32.ring_offset, &init->ring_offset)
91             || __put_user(init32.ring_rptr_offset, &init->ring_rptr_offset)
92             || __put_user(init32.buffers_offset, &init->buffers_offset)
93             || __put_user(init32.agp_textures_offset,
94                           &init->agp_textures_offset))
95                 return -EFAULT;
96
97         return drm_ioctl(file, DRM_IOCTL_R128_INIT, (unsigned long)init);
98 }
99
100 typedef struct drm_r128_depth32 {
101         int func;
102         int n;
103         u32 x;
104         u32 y;
105         u32 buffer;
106         u32 mask;
107 } drm_r128_depth32_t;
108
109 static int compat_r128_depth(struct file *file, unsigned int cmd,
110                              unsigned long arg)
111 {
112         drm_r128_depth32_t depth32;
113         drm_r128_depth_t __user *depth;
114
115         if (copy_from_user(&depth32, (void __user *)arg, sizeof(depth32)))
116                 return -EFAULT;
117
118         depth = compat_alloc_user_space(sizeof(*depth));
119         if (!access_ok(VERIFY_WRITE, depth, sizeof(*depth))
120             || __put_user(depth32.func, &depth->func)
121             || __put_user(depth32.n, &depth->n)
122             || __put_user((int __user *)(unsigned long)depth32.x, &depth->x)
123             || __put_user((int __user *)(unsigned long)depth32.y, &depth->y)
124             || __put_user((unsigned int __user *)(unsigned long)depth32.buffer,
125                           &depth->buffer)
126             || __put_user((unsigned char __user *)(unsigned long)depth32.mask,
127                           &depth->mask))
128                 return -EFAULT;
129
130         return drm_ioctl(file, DRM_IOCTL_R128_DEPTH, (unsigned long)depth);
131
132 }
133
134 typedef struct drm_r128_stipple32 {
135         u32 mask;
136 } drm_r128_stipple32_t;
137
138 static int compat_r128_stipple(struct file *file, unsigned int cmd,
139                                unsigned long arg)
140 {
141         drm_r128_stipple32_t stipple32;
142         drm_r128_stipple_t __user *stipple;
143
144         if (copy_from_user(&stipple32, (void __user *)arg, sizeof(stipple32)))
145                 return -EFAULT;
146
147         stipple = compat_alloc_user_space(sizeof(*stipple));
148         if (!access_ok(VERIFY_WRITE, stipple, sizeof(*stipple))
149             || __put_user((unsigned int __user *)(unsigned long)stipple32.mask,
150                           &stipple->mask))
151                 return -EFAULT;
152
153         return drm_ioctl(file, DRM_IOCTL_R128_STIPPLE, (unsigned long)stipple);
154 }
155
156 typedef struct drm_r128_getparam32 {
157         int param;
158         u32 value;
159 } drm_r128_getparam32_t;
160
161 static int compat_r128_getparam(struct file *file, unsigned int cmd,
162                                 unsigned long arg)
163 {
164         drm_r128_getparam32_t getparam32;
165         drm_r128_getparam_t __user *getparam;
166
167         if (copy_from_user(&getparam32, (void __user *)arg, sizeof(getparam32)))
168                 return -EFAULT;
169
170         getparam = compat_alloc_user_space(sizeof(*getparam));
171         if (!access_ok(VERIFY_WRITE, getparam, sizeof(*getparam))
172             || __put_user(getparam32.param, &getparam->param)
173             || __put_user((void __user *)(unsigned long)getparam32.value,
174                           &getparam->value))
175                 return -EFAULT;
176
177         return drm_ioctl(file, DRM_IOCTL_R128_GETPARAM, (unsigned long)getparam);
178 }
179
180 drm_ioctl_compat_t *r128_compat_ioctls[] = {
181         [DRM_R128_INIT] = compat_r128_init,
182         [DRM_R128_DEPTH] = compat_r128_depth,
183         [DRM_R128_STIPPLE] = compat_r128_stipple,
184         [DRM_R128_GETPARAM] = compat_r128_getparam,
185 };
186
187 /**
188  * Called whenever a 32-bit process running under a 64-bit kernel
189  * performs an ioctl on /dev/dri/card<n>.
190  *
191  * \param filp file pointer.
192  * \param cmd command.
193  * \param arg user argument.
194  * \return zero on success or negative number on failure.
195  */
196 long r128_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
197 {
198         unsigned int nr = DRM_IOCTL_NR(cmd);
199         drm_ioctl_compat_t *fn = NULL;
200         int ret;
201
202         if (nr < DRM_COMMAND_BASE)
203                 return drm_compat_ioctl(filp, cmd, arg);
204
205         if (nr < DRM_COMMAND_BASE + DRM_ARRAY_SIZE(r128_compat_ioctls))
206                 fn = r128_compat_ioctls[nr - DRM_COMMAND_BASE];
207
208         if (fn != NULL)
209                 ret = (*fn) (filp, cmd, arg);
210         else
211                 ret = drm_ioctl(filp, cmd, arg);
212
213         return ret;
214 }