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 #include "r128_drv.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
compat_r128_init(struct file * file,unsigned int cmd,unsigned long arg)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 init;
67
68 if (copy_from_user(&init32, (void __user *)arg, sizeof(init32)))
69 return -EFAULT;
70
71 init.func = init32.func;
72 init.sarea_priv_offset = init32.sarea_priv_offset;
73 init.is_pci = init32.is_pci;
74 init.cce_mode = init32.cce_mode;
75 init.cce_secure = init32.cce_secure;
76 init.ring_size = init32.ring_size;
77 init.usec_timeout = init32.usec_timeout;
78 init.fb_bpp = init32.fb_bpp;
79 init.front_offset = init32.front_offset;
80 init.front_pitch = init32.front_pitch;
81 init.back_offset = init32.back_offset;
82 init.back_pitch = init32.back_pitch;
83 init.depth_bpp = init32.depth_bpp;
84 init.depth_offset = init32.depth_offset;
85 init.depth_pitch = init32.depth_pitch;
86 init.span_offset = init32.span_offset;
87 init.fb_offset = init32.fb_offset;
88 init.mmio_offset = init32.mmio_offset;
89 init.ring_offset = init32.ring_offset;
90 init.ring_rptr_offset = init32.ring_rptr_offset;
91 init.buffers_offset = init32.buffers_offset;
92 init.agp_textures_offset = init32.agp_textures_offset;
93
94 return drm_ioctl_kernel(file, r128_cce_init, &init,
95 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
96 }
97
98 typedef struct drm_r128_depth32 {
99 int func;
100 int n;
101 u32 x;
102 u32 y;
103 u32 buffer;
104 u32 mask;
105 } drm_r128_depth32_t;
106
compat_r128_depth(struct file * file,unsigned int cmd,unsigned long arg)107 static int compat_r128_depth(struct file *file, unsigned int cmd,
108 unsigned long arg)
109 {
110 drm_r128_depth32_t depth32;
111 drm_r128_depth_t depth;
112
113 if (copy_from_user(&depth32, (void __user *)arg, sizeof(depth32)))
114 return -EFAULT;
115
116 depth.func = depth32.func;
117 depth.n = depth32.n;
118 depth.x = compat_ptr(depth32.x);
119 depth.y = compat_ptr(depth32.y);
120 depth.buffer = compat_ptr(depth32.buffer);
121 depth.mask = compat_ptr(depth32.mask);
122
123 return drm_ioctl_kernel(file, r128_cce_depth, &depth, DRM_AUTH);
124 }
125
126 typedef struct drm_r128_stipple32 {
127 u32 mask;
128 } drm_r128_stipple32_t;
129
compat_r128_stipple(struct file * file,unsigned int cmd,unsigned long arg)130 static int compat_r128_stipple(struct file *file, unsigned int cmd,
131 unsigned long arg)
132 {
133 drm_r128_stipple32_t stipple32;
134 drm_r128_stipple_t stipple;
135
136 if (copy_from_user(&stipple32, (void __user *)arg, sizeof(stipple32)))
137 return -EFAULT;
138
139 stipple.mask = compat_ptr(stipple32.mask);
140
141 return drm_ioctl_kernel(file, r128_cce_stipple, &stipple, DRM_AUTH);
142 }
143
144 typedef struct drm_r128_getparam32 {
145 int param;
146 u32 value;
147 } drm_r128_getparam32_t;
148
compat_r128_getparam(struct file * file,unsigned int cmd,unsigned long arg)149 static int compat_r128_getparam(struct file *file, unsigned int cmd,
150 unsigned long arg)
151 {
152 drm_r128_getparam32_t getparam32;
153 drm_r128_getparam_t getparam;
154
155 if (copy_from_user(&getparam32, (void __user *)arg, sizeof(getparam32)))
156 return -EFAULT;
157
158 getparam.param = getparam32.param;
159 getparam.value = compat_ptr(getparam32.value);
160
161 return drm_ioctl_kernel(file, r128_getparam, &getparam, DRM_AUTH);
162 }
163
164 drm_ioctl_compat_t *r128_compat_ioctls[] = {
165 [DRM_R128_INIT] = compat_r128_init,
166 [DRM_R128_DEPTH] = compat_r128_depth,
167 [DRM_R128_STIPPLE] = compat_r128_stipple,
168 [DRM_R128_GETPARAM] = compat_r128_getparam,
169 };
170
171 /**
172 * Called whenever a 32-bit process running under a 64-bit kernel
173 * performs an ioctl on /dev/dri/card<n>.
174 *
175 * \param filp file pointer.
176 * \param cmd command.
177 * \param arg user argument.
178 * \return zero on success or negative number on failure.
179 */
r128_compat_ioctl(struct file * filp,unsigned int cmd,unsigned long arg)180 long r128_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
181 {
182 unsigned int nr = DRM_IOCTL_NR(cmd);
183 drm_ioctl_compat_t *fn = NULL;
184 int ret;
185
186 if (nr < DRM_COMMAND_BASE)
187 return drm_compat_ioctl(filp, cmd, arg);
188
189 if (nr < DRM_COMMAND_BASE + ARRAY_SIZE(r128_compat_ioctls))
190 fn = r128_compat_ioctls[nr - DRM_COMMAND_BASE];
191
192 if (fn != NULL)
193 ret = (*fn) (filp, cmd, arg);
194 else
195 ret = drm_ioctl(filp, cmd, arg);
196
197 return ret;
198 }
199
