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8ca7c1df DA |
1 | /** |
2 | * \file i915_ioc32.c | |
3 | * | |
4 | * 32-bit ioctl compatibility routines for the i915 DRM. | |
5 | * | |
b5e89ed5 | 6 | * \author Alan Hourihane <alanh@fairlite.demon.co.uk> |
8ca7c1df DA |
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> | |
8ca7c1df | 33 | |
760285e7 DH |
34 | #include <drm/drmP.h> |
35 | #include <drm/i915_drm.h> | |
c43b5634 | 36 | #include "i915_drv.h" |
8ca7c1df DA |
37 | |
38 | typedef struct _drm_i915_batchbuffer32 { | |
39 | int start; /* agp offset */ | |
40 | int used; /* nr bytes in use */ | |
41 | int DR1; /* hw flags for GFX_OP_DRAWRECT_INFO */ | |
42 | int DR4; /* window origin for GFX_OP_DRAWRECT_INFO */ | |
43 | int num_cliprects; /* mulitpass with multiple cliprects? */ | |
b5e89ed5 | 44 | u32 cliprects; /* pointer to userspace cliprects */ |
8ca7c1df DA |
45 | } drm_i915_batchbuffer32_t; |
46 | ||
47 | static int compat_i915_batchbuffer(struct file *file, unsigned int cmd, | |
b5e89ed5 | 48 | unsigned long arg) |
8ca7c1df DA |
49 | { |
50 | drm_i915_batchbuffer32_t batchbuffer32; | |
51 | drm_i915_batchbuffer_t __user *batchbuffer; | |
b5e89ed5 DA |
52 | |
53 | if (copy_from_user | |
54 | (&batchbuffer32, (void __user *)arg, sizeof(batchbuffer32))) | |
8ca7c1df | 55 | return -EFAULT; |
b5e89ed5 | 56 | |
8ca7c1df DA |
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) | |
b5e89ed5 DA |
63 | || __put_user(batchbuffer32.num_cliprects, |
64 | &batchbuffer->num_cliprects) | |
8ca7c1df DA |
65 | || __put_user((int __user *)(unsigned long)batchbuffer32.cliprects, |
66 | &batchbuffer->cliprects)) | |
67 | return -EFAULT; | |
b5e89ed5 | 68 | |
ed8b6704 | 69 | return drm_ioctl(file, DRM_IOCTL_I915_BATCHBUFFER, |
b5e89ed5 | 70 | (unsigned long)batchbuffer); |
8ca7c1df DA |
71 | } |
72 | ||
73 | typedef struct _drm_i915_cmdbuffer32 { | |
b5e89ed5 | 74 | u32 buf; /* pointer to userspace command buffer */ |
8ca7c1df DA |
75 | int sz; /* nr bytes in buf */ |
76 | int DR1; /* hw flags for GFX_OP_DRAWRECT_INFO */ | |
77 | int DR4; /* window origin for GFX_OP_DRAWRECT_INFO */ | |
78 | int num_cliprects; /* mulitpass with multiple cliprects? */ | |
b5e89ed5 | 79 | u32 cliprects; /* pointer to userspace cliprects */ |
8ca7c1df DA |
80 | } drm_i915_cmdbuffer32_t; |
81 | ||
82 | static int compat_i915_cmdbuffer(struct file *file, unsigned int cmd, | |
b5e89ed5 | 83 | unsigned long arg) |
8ca7c1df DA |
84 | { |
85 | drm_i915_cmdbuffer32_t cmdbuffer32; | |
86 | drm_i915_cmdbuffer_t __user *cmdbuffer; | |
b5e89ed5 DA |
87 | |
88 | if (copy_from_user | |
89 | (&cmdbuffer32, (void __user *)arg, sizeof(cmdbuffer32))) | |
8ca7c1df | 90 | return -EFAULT; |
b5e89ed5 | 91 | |
8ca7c1df DA |
92 | cmdbuffer = compat_alloc_user_space(sizeof(*cmdbuffer)); |
93 | if (!access_ok(VERIFY_WRITE, cmdbuffer, sizeof(*cmdbuffer)) | |
94 | || __put_user((int __user *)(unsigned long)cmdbuffer32.buf, | |
95 | &cmdbuffer->buf) | |
96 | || __put_user(cmdbuffer32.sz, &cmdbuffer->sz) | |
97 | || __put_user(cmdbuffer32.DR1, &cmdbuffer->DR1) | |
98 | || __put_user(cmdbuffer32.DR4, &cmdbuffer->DR4) | |
99 | || __put_user(cmdbuffer32.num_cliprects, &cmdbuffer->num_cliprects) | |
100 | || __put_user((int __user *)(unsigned long)cmdbuffer32.cliprects, | |
101 | &cmdbuffer->cliprects)) | |
102 | return -EFAULT; | |
b5e89ed5 | 103 | |
ed8b6704 AB |
104 | return drm_ioctl(file, DRM_IOCTL_I915_CMDBUFFER, |
105 | (unsigned long)cmdbuffer); | |
8ca7c1df DA |
106 | } |
107 | ||
108 | typedef struct drm_i915_irq_emit32 { | |
109 | u32 irq_seq; | |
110 | } drm_i915_irq_emit32_t; | |
111 | ||
112 | static int compat_i915_irq_emit(struct file *file, unsigned int cmd, | |
b5e89ed5 | 113 | unsigned long arg) |
8ca7c1df DA |
114 | { |
115 | drm_i915_irq_emit32_t req32; | |
116 | drm_i915_irq_emit_t __user *request; | |
117 | ||
b5e89ed5 | 118 | if (copy_from_user(&req32, (void __user *)arg, sizeof(req32))) |
8ca7c1df DA |
119 | return -EFAULT; |
120 | ||
121 | request = compat_alloc_user_space(sizeof(*request)); | |
122 | if (!access_ok(VERIFY_WRITE, request, sizeof(*request)) | |
123 | || __put_user((int __user *)(unsigned long)req32.irq_seq, | |
124 | &request->irq_seq)) | |
125 | return -EFAULT; | |
126 | ||
ed8b6704 AB |
127 | return drm_ioctl(file, DRM_IOCTL_I915_IRQ_EMIT, |
128 | (unsigned long)request); | |
8ca7c1df DA |
129 | } |
130 | typedef struct drm_i915_getparam32 { | |
131 | int param; | |
132 | u32 value; | |
133 | } drm_i915_getparam32_t; | |
134 | ||
135 | static int compat_i915_getparam(struct file *file, unsigned int cmd, | |
b5e89ed5 | 136 | unsigned long arg) |
8ca7c1df DA |
137 | { |
138 | drm_i915_getparam32_t req32; | |
139 | drm_i915_getparam_t __user *request; | |
140 | ||
b5e89ed5 | 141 | if (copy_from_user(&req32, (void __user *)arg, sizeof(req32))) |
8ca7c1df DA |
142 | return -EFAULT; |
143 | ||
144 | request = compat_alloc_user_space(sizeof(*request)); | |
145 | if (!access_ok(VERIFY_WRITE, request, sizeof(*request)) | |
146 | || __put_user(req32.param, &request->param) | |
147 | || __put_user((void __user *)(unsigned long)req32.value, | |
148 | &request->value)) | |
149 | return -EFAULT; | |
150 | ||
ed8b6704 AB |
151 | return drm_ioctl(file, DRM_IOCTL_I915_GETPARAM, |
152 | (unsigned long)request); | |
8ca7c1df DA |
153 | } |
154 | ||
155 | typedef struct drm_i915_mem_alloc32 { | |
156 | int region; | |
157 | int alignment; | |
158 | int size; | |
159 | u32 region_offset; /* offset from start of fb or agp */ | |
160 | } drm_i915_mem_alloc32_t; | |
161 | ||
162 | static int compat_i915_alloc(struct file *file, unsigned int cmd, | |
b5e89ed5 | 163 | unsigned long arg) |
8ca7c1df DA |
164 | { |
165 | drm_i915_mem_alloc32_t req32; | |
166 | drm_i915_mem_alloc_t __user *request; | |
167 | ||
b5e89ed5 | 168 | if (copy_from_user(&req32, (void __user *)arg, sizeof(req32))) |
8ca7c1df DA |
169 | return -EFAULT; |
170 | ||
171 | request = compat_alloc_user_space(sizeof(*request)); | |
172 | if (!access_ok(VERIFY_WRITE, request, sizeof(*request)) | |
173 | || __put_user(req32.region, &request->region) | |
174 | || __put_user(req32.alignment, &request->alignment) | |
175 | || __put_user(req32.size, &request->size) | |
176 | || __put_user((void __user *)(unsigned long)req32.region_offset, | |
177 | &request->region_offset)) | |
178 | return -EFAULT; | |
179 | ||
ed8b6704 AB |
180 | return drm_ioctl(file, DRM_IOCTL_I915_ALLOC, |
181 | (unsigned long)request); | |
8ca7c1df DA |
182 | } |
183 | ||
c43b5634 | 184 | static drm_ioctl_compat_t *i915_compat_ioctls[] = { |
8ca7c1df DA |
185 | [DRM_I915_BATCHBUFFER] = compat_i915_batchbuffer, |
186 | [DRM_I915_CMDBUFFER] = compat_i915_cmdbuffer, | |
187 | [DRM_I915_GETPARAM] = compat_i915_getparam, | |
188 | [DRM_I915_IRQ_EMIT] = compat_i915_irq_emit, | |
189 | [DRM_I915_ALLOC] = compat_i915_alloc | |
190 | }; | |
191 | ||
c43b5634 | 192 | #ifdef CONFIG_COMPAT |
8ca7c1df DA |
193 | /** |
194 | * Called whenever a 32-bit process running under a 64-bit kernel | |
195 | * performs an ioctl on /dev/dri/card<n>. | |
196 | * | |
197 | * \param filp file pointer. | |
198 | * \param cmd command. | |
199 | * \param arg user argument. | |
200 | * \return zero on success or negative number on failure. | |
201 | */ | |
b5e89ed5 | 202 | long i915_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) |
8ca7c1df DA |
203 | { |
204 | unsigned int nr = DRM_IOCTL_NR(cmd); | |
205 | drm_ioctl_compat_t *fn = NULL; | |
206 | int ret; | |
207 | ||
208 | if (nr < DRM_COMMAND_BASE) | |
209 | return drm_compat_ioctl(filp, cmd, arg); | |
b5e89ed5 | 210 | |
8ca7c1df DA |
211 | if (nr < DRM_COMMAND_BASE + DRM_ARRAY_SIZE(i915_compat_ioctls)) |
212 | fn = i915_compat_ioctls[nr - DRM_COMMAND_BASE]; | |
213 | ||
8ca7c1df | 214 | if (fn != NULL) |
b5e89ed5 | 215 | ret = (*fn) (filp, cmd, arg); |
8ca7c1df | 216 | else |
ed8b6704 | 217 | ret = drm_ioctl(filp, cmd, arg); |
8ca7c1df DA |
218 | |
219 | return ret; | |
220 | } | |
c43b5634 | 221 | #endif |