drm: updated DRM map patch for 32/64 bit systems
[linux-2.6.git] / drivers / char / drm / mga_ioc32.c
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 #include <linux/compat.h>
34 #include <linux/ioctl32.h>
35
36 #include "drmP.h"
37 #include "drm.h"
38 #include "mga_drm.h"
39
40 typedef struct drm32_mga_init {
41         int func;
42         u32 sarea_priv_offset;
43         int chipset;
44         int sgram;
45         unsigned int maccess;
46         unsigned int fb_cpp;
47         unsigned int front_offset, front_pitch;
48         unsigned int back_offset, back_pitch;
49         unsigned int depth_cpp;
50         unsigned int depth_offset, depth_pitch;
51         unsigned int texture_offset[MGA_NR_TEX_HEAPS];
52         unsigned int texture_size[MGA_NR_TEX_HEAPS];
53         u32 fb_offset;
54         u32 mmio_offset;
55         u32 status_offset;
56         u32 warp_offset;
57         u32 primary_offset;
58         u32 buffers_offset;
59 } drm_mga_init32_t;
60
61 static int compat_mga_init(struct file *file, unsigned int cmd,
62                            unsigned long arg)
63 {
64         drm_mga_init32_t init32;
65         drm_mga_init_t __user *init;
66         int err = 0, i;
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.chipset, &init->chipset)
76             || __put_user(init32.sgram, &init->sgram)
77             || __put_user(init32.maccess, &init->maccess)
78             || __put_user(init32.fb_cpp, &init->fb_cpp)
79             || __put_user(init32.front_offset, &init->front_offset)
80             || __put_user(init32.front_pitch, &init->front_pitch)
81             || __put_user(init32.back_offset, &init->back_offset)
82             || __put_user(init32.back_pitch, &init->back_pitch)
83             || __put_user(init32.depth_cpp, &init->depth_cpp)
84             || __put_user(init32.depth_offset, &init->depth_offset)
85             || __put_user(init32.depth_pitch, &init->depth_pitch)
86             || __put_user(init32.fb_offset, &init->fb_offset)
87             || __put_user(init32.mmio_offset, &init->mmio_offset)
88             || __put_user(init32.status_offset, &init->status_offset)
89             || __put_user(init32.warp_offset, &init->warp_offset)
90             || __put_user(init32.primary_offset, &init->primary_offset)
91             || __put_user(init32.buffers_offset, &init->buffers_offset))
92                 return -EFAULT;
93         
94         for (i=0; i<MGA_NR_TEX_HEAPS; i++)
95         {
96                 err |= __put_user(init32.texture_offset[i], &init->texture_offset[i]);
97                 err |= __put_user(init32.texture_size[i], &init->texture_size[i]);
98         }
99         if (err)
100                 return -EFAULT;
101         
102         return drm_ioctl(file->f_dentry->d_inode, file,
103                          DRM_IOCTL_MGA_INIT, (unsigned long) init);
104 }
105
106
107 typedef struct drm_mga_getparam32 {
108         int param;
109         u32 value;
110 } drm_mga_getparam32_t;
111
112
113 static int compat_mga_getparam(struct file *file, unsigned int cmd,
114                                unsigned long arg)
115 {
116         drm_mga_getparam32_t getparam32;
117         drm_mga_getparam_t __user *getparam;
118         
119         if (copy_from_user(&getparam32, (void __user *)arg, sizeof(getparam32)))
120                 return -EFAULT;
121
122         getparam = compat_alloc_user_space(sizeof(*getparam));
123         if (!access_ok(VERIFY_WRITE, getparam, sizeof(*getparam))
124             || __put_user(getparam32.param, &getparam->param)
125             || __put_user((void __user *)(unsigned long)getparam32.value, &getparam->value))
126                 return -EFAULT;
127
128         return drm_ioctl(file->f_dentry->d_inode, file, 
129                          DRM_IOCTL_MGA_GETPARAM, (unsigned long)getparam);
130 }
131
132 typedef struct drm_mga_drm_bootstrap32 {
133         u32 texture_handle;
134         u32 texture_size;
135         u32 primary_size;
136         u32 secondary_bin_count;
137         u32 secondary_bin_size;
138         u32 agp_mode;
139         u8 agp_size;
140 } drm_mga_dma_bootstrap32_t;
141
142 static int compat_mga_dma_bootstrap(struct file *file, unsigned int cmd,
143                                     unsigned long arg)
144 {
145         drm_mga_dma_bootstrap32_t dma_bootstrap32;
146         drm_mga_dma_bootstrap_t __user *dma_bootstrap;
147         int err;
148
149         if (copy_from_user(&dma_bootstrap32, (void __user *)arg,
150                            sizeof(dma_bootstrap32)))
151                 return -EFAULT;
152
153         dma_bootstrap = compat_alloc_user_space(sizeof(*dma_bootstrap));
154         if (!access_ok(VERIFY_WRITE, dma_bootstrap, sizeof(*dma_bootstrap))
155             || __put_user(dma_bootstrap32.texture_handle,
156                           &dma_bootstrap->texture_handle)
157             || __put_user(dma_bootstrap32.texture_size,
158                           &dma_bootstrap->texture_size)
159             || __put_user(dma_bootstrap32.primary_size,
160                           &dma_bootstrap->primary_size)
161             || __put_user(dma_bootstrap32.secondary_bin_count,
162                           &dma_bootstrap->secondary_bin_count)
163             || __put_user(dma_bootstrap32.secondary_bin_size,
164                           &dma_bootstrap->secondary_bin_size)
165             || __put_user(dma_bootstrap32.agp_mode, &dma_bootstrap->agp_mode)
166             || __put_user(dma_bootstrap32.agp_size, &dma_bootstrap->agp_size))
167                 return -EFAULT;
168
169         err = drm_ioctl(file->f_dentry->d_inode, file,
170                         DRM_IOCTL_MGA_DMA_BOOTSTRAP,
171                         (unsigned long)dma_bootstrap);
172         if (err)
173                 return err;
174
175         if (__get_user(dma_bootstrap32.texture_handle,
176                        &dma_bootstrap->texture_handle)
177             || __get_user(dma_bootstrap32.texture_size,
178                           &dma_bootstrap->texture_size)
179             || __get_user(dma_bootstrap32.primary_size,
180                           &dma_bootstrap->primary_size)
181             || __get_user(dma_bootstrap32.secondary_bin_count,
182                           &dma_bootstrap->secondary_bin_count)
183             || __get_user(dma_bootstrap32.secondary_bin_size,
184                           &dma_bootstrap->secondary_bin_size)
185             || __get_user(dma_bootstrap32.agp_mode,
186                           &dma_bootstrap->agp_mode)
187             || __get_user(dma_bootstrap32.agp_size,
188                           &dma_bootstrap->agp_size))
189                 return -EFAULT;
190
191         if (copy_to_user((void __user *)arg, &dma_bootstrap32,
192                          sizeof(dma_bootstrap32)))
193                 return -EFAULT;
194
195         return 0;
196 }
197
198 drm_ioctl_compat_t *mga_compat_ioctls[] = {
199         [DRM_MGA_INIT] = compat_mga_init,
200         [DRM_MGA_GETPARAM] = compat_mga_getparam,
201         [DRM_MGA_DMA_BOOTSTRAP] = compat_mga_dma_bootstrap,
202 };
203
204 /**
205  * Called whenever a 32-bit process running under a 64-bit kernel
206  * performs an ioctl on /dev/dri/card<n>.
207  *
208  * \param filp file pointer.
209  * \param cmd command.
210  * \param arg user argument.
211  * \return zero on success or negative number on failure.
212  */
213 long mga_compat_ioctl(struct file *filp, unsigned int cmd,
214                          unsigned long arg)
215 {
216         unsigned int nr = DRM_IOCTL_NR(cmd);
217         drm_ioctl_compat_t *fn = NULL;
218         int ret;
219
220         if (nr < DRM_COMMAND_BASE)
221                 return drm_compat_ioctl(filp, cmd, arg);
222         
223         if (nr < DRM_COMMAND_BASE + DRM_ARRAY_SIZE(mga_compat_ioctls))
224                 fn = mga_compat_ioctls[nr - DRM_COMMAND_BASE];
225
226         lock_kernel();          /* XXX for now */
227         if (fn != NULL)
228                 ret = (*fn)(filp, cmd, arg);
229         else
230                 ret = drm_ioctl(filp->f_dentry->d_inode, filp, cmd, arg);
231         unlock_kernel();
232
233         return ret;
234 }