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
33 #include <linux/compat.h>
34
35 #include <drm/r128_drm.h>
36
37 #include "r128_drv.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
compat_r128_init(struct file * file,unsigned int cmd,unsigned long arg)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 init;
68
69 if (copy_from_user(&init32, (void __user *)arg, sizeof(init32)))
70 return -EFAULT;
71
72 init.func = init32.func;
73 init.sarea_priv_offset = init32.sarea_priv_offset;
74 init.is_pci = init32.is_pci;
75 init.cce_mode = init32.cce_mode;
76 init.cce_secure = init32.cce_secure;
77 init.ring_size = init32.ring_size;
78 init.usec_timeout = init32.usec_timeout;
79 init.fb_bpp = init32.fb_bpp;
80 init.front_offset = init32.front_offset;
81 init.front_pitch = init32.front_pitch;
82 init.back_offset = init32.back_offset;
83 init.back_pitch = init32.back_pitch;
84 init.depth_bpp = init32.depth_bpp;
85 init.depth_offset = init32.depth_offset;
86 init.depth_pitch = init32.depth_pitch;
87 init.span_offset = init32.span_offset;
88 init.fb_offset = init32.fb_offset;
89 init.mmio_offset = init32.mmio_offset;
90 init.ring_offset = init32.ring_offset;
91 init.ring_rptr_offset = init32.ring_rptr_offset;
92 init.buffers_offset = init32.buffers_offset;
93 init.agp_textures_offset = init32.agp_textures_offset;
94
95 return drm_ioctl_kernel(file, r128_cce_init, &init,
96 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
97 }
98
99 typedef struct drm_r128_depth32 {
100 int func;
101 int n;
102 u32 x;
103 u32 y;
104 u32 buffer;
105 u32 mask;
106 } drm_r128_depth32_t;
107
compat_r128_depth(struct file * file,unsigned int cmd,unsigned long arg)108 static int compat_r128_depth(struct file *file, unsigned int cmd,
109 unsigned long arg)
110 {
111 drm_r128_depth32_t depth32;
112 drm_r128_depth_t depth;
113
114 if (copy_from_user(&depth32, (void __user *)arg, sizeof(depth32)))
115 return -EFAULT;
116
117 depth.func = depth32.func;
118 depth.n = depth32.n;
119 depth.x = compat_ptr(depth32.x);
120 depth.y = compat_ptr(depth32.y);
121 depth.buffer = compat_ptr(depth32.buffer);
122 depth.mask = compat_ptr(depth32.mask);
123
124 return drm_ioctl_kernel(file, r128_cce_depth, &depth, DRM_AUTH);
125 }
126
127 typedef struct drm_r128_stipple32 {
128 u32 mask;
129 } drm_r128_stipple32_t;
130
compat_r128_stipple(struct file * file,unsigned int cmd,unsigned long arg)131 static int compat_r128_stipple(struct file *file, unsigned int cmd,
132 unsigned long arg)
133 {
134 drm_r128_stipple32_t stipple32;
135 drm_r128_stipple_t stipple;
136
137 if (copy_from_user(&stipple32, (void __user *)arg, sizeof(stipple32)))
138 return -EFAULT;
139
140 stipple.mask = compat_ptr(stipple32.mask);
141
142 return drm_ioctl_kernel(file, r128_cce_stipple, &stipple, DRM_AUTH);
143 }
144
145 typedef struct drm_r128_getparam32 {
146 int param;
147 u32 value;
148 } drm_r128_getparam32_t;
149
compat_r128_getparam(struct file * file,unsigned int cmd,unsigned long arg)150 static int compat_r128_getparam(struct file *file, unsigned int cmd,
151 unsigned long arg)
152 {
153 drm_r128_getparam32_t getparam32;
154 drm_r128_getparam_t getparam;
155
156 if (copy_from_user(&getparam32, (void __user *)arg, sizeof(getparam32)))
157 return -EFAULT;
158
159 getparam.param = getparam32.param;
160 getparam.value = compat_ptr(getparam32.value);
161
162 return drm_ioctl_kernel(file, r128_getparam, &getparam, DRM_AUTH);
163 }
164
165 drm_ioctl_compat_t *r128_compat_ioctls[] = {
166 [DRM_R128_INIT] = compat_r128_init,
167 [DRM_R128_DEPTH] = compat_r128_depth,
168 [DRM_R128_STIPPLE] = compat_r128_stipple,
169 [DRM_R128_GETPARAM] = compat_r128_getparam,
170 };
171
172 /**
173 * Called whenever a 32-bit process running under a 64-bit kernel
174 * performs an ioctl on /dev/dri/card<n>.
175 *
176 * \param filp file pointer.
177 * \param cmd command.
178 * \param arg user argument.
179 * \return zero on success or negative number on failure.
180 */
r128_compat_ioctl(struct file * filp,unsigned int cmd,unsigned long arg)181 long r128_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
182 {
183 unsigned int nr = DRM_IOCTL_NR(cmd);
184 drm_ioctl_compat_t *fn = NULL;
185 int ret;
186
187 if (nr < DRM_COMMAND_BASE)
188 return drm_compat_ioctl(filp, cmd, arg);
189
190 if (nr < DRM_COMMAND_BASE + ARRAY_SIZE(r128_compat_ioctls))
191 fn = r128_compat_ioctls[nr - DRM_COMMAND_BASE];
192
193 if (fn != NULL)
194 ret = (*fn) (filp, cmd, arg);
195 else
196 ret = drm_ioctl(filp, cmd, arg);
197
198 return ret;
199 }
200
