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path: root/drivers/char/drm/r128_ioc32.c
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Diffstat (limited to 'drivers/char/drm/r128_ioc32.c')
-rw-r--r--drivers/char/drm/r128_ioc32.c219
1 files changed, 219 insertions, 0 deletions
diff --git a/drivers/char/drm/r128_ioc32.c b/drivers/char/drm/r128_ioc32.c
new file mode 100644
index 000000000000..60598ef9475a
--- /dev/null
+++ b/drivers/char/drm/r128_ioc32.c
@@ -0,0 +1,219 @@
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
39typedef 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
63static 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, &init->agp_textures_offset))
96 return -EFAULT;
97
98 return drm_ioctl(file->f_dentry->d_inode, file,
99 DRM_IOCTL_R128_INIT, (unsigned long)init);
100}
101
102
103typedef 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
112static 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, &depth->buffer)
128 || __put_user((unsigned char __user *)(unsigned long)depth32.mask, &depth->mask))
129 return -EFAULT;
130
131 return drm_ioctl(file->f_dentry->d_inode, file,
132 DRM_IOCTL_R128_DEPTH, (unsigned long)depth);
133
134}
135
136typedef struct drm_r128_stipple32 {
137 u32 mask;
138} drm_r128_stipple32_t;
139
140static int compat_r128_stipple(struct file *file, unsigned int cmd,
141 unsigned long arg)
142{
143 drm_r128_stipple32_t stipple32;
144 drm_r128_stipple_t __user *stipple;
145
146 if (copy_from_user(&stipple32, (void __user *)arg, sizeof(stipple32)))
147 return -EFAULT;
148
149 stipple = compat_alloc_user_space(sizeof(*stipple));
150 if (!access_ok(VERIFY_WRITE, stipple, sizeof(*stipple))
151 || __put_user((unsigned int __user *)(unsigned long)stipple32.mask, &stipple->mask))
152 return -EFAULT;
153
154 return drm_ioctl(file->f_dentry->d_inode, file,
155 DRM_IOCTL_R128_STIPPLE, (unsigned long)stipple);
156}
157
158typedef struct drm_r128_getparam32 {
159 int param;
160 u32 value;
161} drm_r128_getparam32_t;
162
163static int compat_r128_getparam(struct file *file, unsigned int cmd,
164 unsigned long arg)
165{
166 drm_r128_getparam32_t getparam32;
167 drm_r128_getparam_t __user *getparam;
168
169 if (copy_from_user(&getparam32, (void __user *)arg, sizeof(getparam32)))
170 return -EFAULT;
171
172 getparam = compat_alloc_user_space(sizeof(*getparam));
173 if (!access_ok(VERIFY_WRITE, getparam, sizeof(*getparam))
174 || __put_user(getparam32.param, &getparam->param)
175 || __put_user((void __user *)(unsigned long)getparam32.value, &getparam->value))
176 return -EFAULT;
177
178 return drm_ioctl(file->f_dentry->d_inode, file,
179 DRM_IOCTL_R128_GETPARAM, (unsigned long)getparam);
180}
181
182drm_ioctl_compat_t *r128_compat_ioctls[] = {
183 [DRM_R128_INIT] = compat_r128_init,
184 [DRM_R128_DEPTH] = compat_r128_depth,
185 [DRM_R128_STIPPLE] = compat_r128_stipple,
186 [DRM_R128_GETPARAM] = compat_r128_getparam,
187};
188
189/**
190 * Called whenever a 32-bit process running under a 64-bit kernel
191 * performs an ioctl on /dev/dri/card<n>.
192 *
193 * \param filp file pointer.
194 * \param cmd command.
195 * \param arg user argument.
196 * \return zero on success or negative number on failure.
197 */
198long r128_compat_ioctl(struct file *filp, unsigned int cmd,
199 unsigned long arg)
200{
201 unsigned int nr = DRM_IOCTL_NR(cmd);
202 drm_ioctl_compat_t *fn = NULL;
203 int ret;
204
205 if (nr < DRM_COMMAND_BASE)
206 return drm_compat_ioctl(filp, cmd, arg);
207
208 if (nr < DRM_COMMAND_BASE + DRM_ARRAY_SIZE(r128_compat_ioctls))
209 fn = r128_compat_ioctls[nr - DRM_COMMAND_BASE];
210
211 lock_kernel(); /* XXX for now */
212 if (fn != NULL)
213 ret = (*fn)(filp, cmd, arg);
214 else
215 ret = drm_ioctl(filp->f_dentry->d_inode, filp, cmd, arg);
216 unlock_kernel();
217
218 return ret;
219}
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-20 00:35:41 -0500