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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 | ||
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 | ||
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 __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 | ||
103 | typedef 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 | ||
112 | static 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 | ||
136 | typedef struct drm_r128_stipple32 { | |
137 | u32 mask; | |
138 | } drm_r128_stipple32_t; | |
139 | ||
140 | static 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 | ||
158 | typedef struct drm_r128_getparam32 { | |
159 | int param; | |
160 | u32 value; | |
161 | } drm_r128_getparam32_t; | |
162 | ||
163 | static 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 | ||
182 | drm_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 | */ | |
198 | long 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 | } |