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1 | /** |
2 | * \file i915_ioc32.c | |
3 | * | |
4 | * 32-bit ioctl compatibility routines for the i915 DRM. | |
5 | * | |
6 | * \author Alan Hourihane <alanh@fairlite.demon.co.uk> | |
7 | * | |
8 | * | |
9 | * Copyright (C) Paul Mackerras 2005 | |
10 | * Copyright (C) Alan Hourihane 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 "i915_drm.h" | |
38 | ||
39 | typedef struct _drm_i915_batchbuffer32 { | |
40 | int start; /* agp offset */ | |
41 | int used; /* nr bytes in use */ | |
42 | int DR1; /* hw flags for GFX_OP_DRAWRECT_INFO */ | |
43 | int DR4; /* window origin for GFX_OP_DRAWRECT_INFO */ | |
44 | int num_cliprects; /* mulitpass with multiple cliprects? */ | |
45 | u32 cliprects; /* pointer to userspace cliprects */ | |
46 | } drm_i915_batchbuffer32_t; | |
47 | ||
48 | static int compat_i915_batchbuffer(struct file *file, unsigned int cmd, | |
49 | unsigned long arg) | |
50 | { | |
51 | drm_i915_batchbuffer32_t batchbuffer32; | |
52 | drm_i915_batchbuffer_t __user *batchbuffer; | |
53 | ||
54 | if (copy_from_user(&batchbuffer32, (void __user *)arg, sizeof(batchbuffer32))) | |
55 | return -EFAULT; | |
56 | ||
57 | batchbuffer = compat_alloc_user_space(sizeof(*batchbuffer)); | |
58 | if (!access_ok(VERIFY_WRITE, batchbuffer, sizeof(*batchbuffer)) | |
59 | || __put_user(batchbuffer32.start, &batchbuffer->start) | |
60 | || __put_user(batchbuffer32.used, &batchbuffer->used) | |
61 | || __put_user(batchbuffer32.DR1, &batchbuffer->DR1) | |
62 | || __put_user(batchbuffer32.DR4, &batchbuffer->DR4) | |
63 | || __put_user(batchbuffer32.num_cliprects, &batchbuffer->num_cliprects) | |
64 | || __put_user((int __user *)(unsigned long)batchbuffer32.cliprects, | |
65 | &batchbuffer->cliprects)) | |
66 | return -EFAULT; | |
67 | ||
68 | return drm_ioctl(file->f_dentry->d_inode, file, | |
69 | DRM_IOCTL_I915_BATCHBUFFER, (unsigned long) batchbuffer); | |
70 | } | |
71 | ||
72 | typedef struct _drm_i915_cmdbuffer32 { | |
73 | u32 buf; /* pointer to userspace command buffer */ | |
74 | int sz; /* nr bytes in buf */ | |
75 | int DR1; /* hw flags for GFX_OP_DRAWRECT_INFO */ | |
76 | int DR4; /* window origin for GFX_OP_DRAWRECT_INFO */ | |
77 | int num_cliprects; /* mulitpass with multiple cliprects? */ | |
78 | u32 cliprects; /* pointer to userspace cliprects */ | |
79 | } drm_i915_cmdbuffer32_t; | |
80 | ||
81 | static int compat_i915_cmdbuffer(struct file *file, unsigned int cmd, | |
82 | unsigned long arg) | |
83 | { | |
84 | drm_i915_cmdbuffer32_t cmdbuffer32; | |
85 | drm_i915_cmdbuffer_t __user *cmdbuffer; | |
86 | ||
87 | if (copy_from_user(&cmdbuffer32, (void __user *)arg, sizeof(cmdbuffer32))) | |
88 | return -EFAULT; | |
89 | ||
90 | cmdbuffer = compat_alloc_user_space(sizeof(*cmdbuffer)); | |
91 | if (!access_ok(VERIFY_WRITE, cmdbuffer, sizeof(*cmdbuffer)) | |
92 | || __put_user((int __user *)(unsigned long)cmdbuffer32.buf, | |
93 | &cmdbuffer->buf) | |
94 | || __put_user(cmdbuffer32.sz, &cmdbuffer->sz) | |
95 | || __put_user(cmdbuffer32.DR1, &cmdbuffer->DR1) | |
96 | || __put_user(cmdbuffer32.DR4, &cmdbuffer->DR4) | |
97 | || __put_user(cmdbuffer32.num_cliprects, &cmdbuffer->num_cliprects) | |
98 | || __put_user((int __user *)(unsigned long)cmdbuffer32.cliprects, | |
99 | &cmdbuffer->cliprects)) | |
100 | return -EFAULT; | |
101 | ||
102 | return drm_ioctl(file->f_dentry->d_inode, file, | |
103 | DRM_IOCTL_I915_CMDBUFFER, (unsigned long) cmdbuffer); | |
104 | } | |
105 | ||
106 | typedef struct drm_i915_irq_emit32 { | |
107 | u32 irq_seq; | |
108 | } drm_i915_irq_emit32_t; | |
109 | ||
110 | static int compat_i915_irq_emit(struct file *file, unsigned int cmd, | |
111 | unsigned long arg) | |
112 | { | |
113 | drm_i915_irq_emit32_t req32; | |
114 | drm_i915_irq_emit_t __user *request; | |
115 | ||
116 | if (copy_from_user(&req32, (void __user *) arg, sizeof(req32))) | |
117 | return -EFAULT; | |
118 | ||
119 | request = compat_alloc_user_space(sizeof(*request)); | |
120 | if (!access_ok(VERIFY_WRITE, request, sizeof(*request)) | |
121 | || __put_user((int __user *)(unsigned long)req32.irq_seq, | |
122 | &request->irq_seq)) | |
123 | return -EFAULT; | |
124 | ||
125 | return drm_ioctl(file->f_dentry->d_inode, file, | |
126 | DRM_IOCTL_I915_IRQ_EMIT, (unsigned long) request); | |
127 | } | |
128 | typedef struct drm_i915_getparam32 { | |
129 | int param; | |
130 | u32 value; | |
131 | } drm_i915_getparam32_t; | |
132 | ||
133 | static int compat_i915_getparam(struct file *file, unsigned int cmd, | |
134 | unsigned long arg) | |
135 | { | |
136 | drm_i915_getparam32_t req32; | |
137 | drm_i915_getparam_t __user *request; | |
138 | ||
139 | if (copy_from_user(&req32, (void __user *) arg, sizeof(req32))) | |
140 | return -EFAULT; | |
141 | ||
142 | request = compat_alloc_user_space(sizeof(*request)); | |
143 | if (!access_ok(VERIFY_WRITE, request, sizeof(*request)) | |
144 | || __put_user(req32.param, &request->param) | |
145 | || __put_user((void __user *)(unsigned long)req32.value, | |
146 | &request->value)) | |
147 | return -EFAULT; | |
148 | ||
149 | return drm_ioctl(file->f_dentry->d_inode, file, | |
150 | DRM_IOCTL_I915_GETPARAM, (unsigned long) request); | |
151 | } | |
152 | ||
153 | typedef struct drm_i915_mem_alloc32 { | |
154 | int region; | |
155 | int alignment; | |
156 | int size; | |
157 | u32 region_offset; /* offset from start of fb or agp */ | |
158 | } drm_i915_mem_alloc32_t; | |
159 | ||
160 | static int compat_i915_alloc(struct file *file, unsigned int cmd, | |
161 | unsigned long arg) | |
162 | { | |
163 | drm_i915_mem_alloc32_t req32; | |
164 | drm_i915_mem_alloc_t __user *request; | |
165 | ||
166 | if (copy_from_user(&req32, (void __user *) arg, sizeof(req32))) | |
167 | return -EFAULT; | |
168 | ||
169 | request = compat_alloc_user_space(sizeof(*request)); | |
170 | if (!access_ok(VERIFY_WRITE, request, sizeof(*request)) | |
171 | || __put_user(req32.region, &request->region) | |
172 | || __put_user(req32.alignment, &request->alignment) | |
173 | || __put_user(req32.size, &request->size) | |
174 | || __put_user((void __user *)(unsigned long)req32.region_offset, | |
175 | &request->region_offset)) | |
176 | return -EFAULT; | |
177 | ||
178 | return drm_ioctl(file->f_dentry->d_inode, file, | |
179 | DRM_IOCTL_I915_ALLOC, (unsigned long) request); | |
180 | } | |
181 | ||
182 | ||
183 | drm_ioctl_compat_t *i915_compat_ioctls[] = { | |
184 | [DRM_I915_BATCHBUFFER] = compat_i915_batchbuffer, | |
185 | [DRM_I915_CMDBUFFER] = compat_i915_cmdbuffer, | |
186 | [DRM_I915_GETPARAM] = compat_i915_getparam, | |
187 | [DRM_I915_IRQ_EMIT] = compat_i915_irq_emit, | |
188 | [DRM_I915_ALLOC] = compat_i915_alloc | |
189 | }; | |
190 | ||
191 | /** | |
192 | * Called whenever a 32-bit process running under a 64-bit kernel | |
193 | * performs an ioctl on /dev/dri/card<n>. | |
194 | * | |
195 | * \param filp file pointer. | |
196 | * \param cmd command. | |
197 | * \param arg user argument. | |
198 | * \return zero on success or negative number on failure. | |
199 | */ | |
200 | long i915_compat_ioctl(struct file *filp, unsigned int cmd, | |
201 | unsigned long arg) | |
202 | { | |
203 | unsigned int nr = DRM_IOCTL_NR(cmd); | |
204 | drm_ioctl_compat_t *fn = NULL; | |
205 | int ret; | |
206 | ||
207 | if (nr < DRM_COMMAND_BASE) | |
208 | return drm_compat_ioctl(filp, cmd, arg); | |
209 | ||
210 | if (nr < DRM_COMMAND_BASE + DRM_ARRAY_SIZE(i915_compat_ioctls)) | |
211 | fn = i915_compat_ioctls[nr - DRM_COMMAND_BASE]; | |
212 | ||
213 | lock_kernel(); /* XXX for now */ | |
214 | if (fn != NULL) | |
215 | ret = (*fn)(filp, cmd, arg); | |
216 | else | |
217 | ret = drm_ioctl(filp->f_dentry->d_inode, filp, cmd, arg); | |
218 | unlock_kernel(); | |
219 | ||
220 | return ret; | |
221 | } |