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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
34#include <drm/drmP.h>
35#include <drm/i915_drm.h>
36#include "i915_drv.h"
37
38struct drm_i915_getparam32 {
39 s32 param;
40 /*
41 * We screwed up the generic ioctl struct here and used a variable-sized
42 * pointer. Use u32 in the compat struct to match the 32bit pointer
43 * userspace expects.
44 */
45 u32 value;
46};
47
48static int compat_i915_getparam(struct file *file, unsigned int cmd,
49 unsigned long arg)
50{
51 struct drm_i915_getparam32 req32;
52 drm_i915_getparam_t __user *request;
53
54 if (copy_from_user(&req32, (void __user *)arg, sizeof(req32)))
55 return -EFAULT;
56
57 request = compat_alloc_user_space(sizeof(*request));
58 if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
59 || __put_user(req32.param, &request->param)
60 || __put_user((void __user *)(unsigned long)req32.value,
61 &request->value))
62 return -EFAULT;
63
64 return drm_ioctl(file, DRM_IOCTL_I915_GETPARAM,
65 (unsigned long)request);
66}
67
68static drm_ioctl_compat_t *i915_compat_ioctls[] = {
69 [DRM_I915_GETPARAM] = compat_i915_getparam,
70};
71
72/**
73 * Called whenever a 32-bit process running under a 64-bit kernel
74 * performs an ioctl on /dev/dri/card<n>.
75 *
76 * \param filp file pointer.
77 * \param cmd command.
78 * \param arg user argument.
79 * \return zero on success or negative number on failure.
80 */
81long i915_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
82{
83 unsigned int nr = DRM_IOCTL_NR(cmd);
84 drm_ioctl_compat_t *fn = NULL;
85 int ret;
86
87 if (nr < DRM_COMMAND_BASE || nr >= DRM_COMMAND_END)
88 return drm_compat_ioctl(filp, cmd, arg);
89
90 if (nr < DRM_COMMAND_BASE + ARRAY_SIZE(i915_compat_ioctls))
91 fn = i915_compat_ioctls[nr - DRM_COMMAND_BASE];
92
93 if (fn != NULL)
94 ret = (*fn) (filp, cmd, arg);
95 else
96 ret = drm_ioctl(filp, cmd, arg);
97
98 return ret;
99}
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
34#include "drmP.h"
35#include "drm.h"
36#include "i915_drm.h"
37#include "i915_drv.h"
38
39typedef 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
48static 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
55 (&batchbuffer32, (void __user *)arg, sizeof(batchbuffer32)))
56 return -EFAULT;
57
58 batchbuffer = compat_alloc_user_space(sizeof(*batchbuffer));
59 if (!access_ok(VERIFY_WRITE, batchbuffer, sizeof(*batchbuffer))
60 || __put_user(batchbuffer32.start, &batchbuffer->start)
61 || __put_user(batchbuffer32.used, &batchbuffer->used)
62 || __put_user(batchbuffer32.DR1, &batchbuffer->DR1)
63 || __put_user(batchbuffer32.DR4, &batchbuffer->DR4)
64 || __put_user(batchbuffer32.num_cliprects,
65 &batchbuffer->num_cliprects)
66 || __put_user((int __user *)(unsigned long)batchbuffer32.cliprects,
67 &batchbuffer->cliprects))
68 return -EFAULT;
69
70 return drm_ioctl(file, DRM_IOCTL_I915_BATCHBUFFER,
71 (unsigned long)batchbuffer);
72}
73
74typedef struct _drm_i915_cmdbuffer32 {
75 u32 buf; /* pointer to userspace command buffer */
76 int sz; /* nr bytes in buf */
77 int DR1; /* hw flags for GFX_OP_DRAWRECT_INFO */
78 int DR4; /* window origin for GFX_OP_DRAWRECT_INFO */
79 int num_cliprects; /* mulitpass with multiple cliprects? */
80 u32 cliprects; /* pointer to userspace cliprects */
81} drm_i915_cmdbuffer32_t;
82
83static int compat_i915_cmdbuffer(struct file *file, unsigned int cmd,
84 unsigned long arg)
85{
86 drm_i915_cmdbuffer32_t cmdbuffer32;
87 drm_i915_cmdbuffer_t __user *cmdbuffer;
88
89 if (copy_from_user
90 (&cmdbuffer32, (void __user *)arg, sizeof(cmdbuffer32)))
91 return -EFAULT;
92
93 cmdbuffer = compat_alloc_user_space(sizeof(*cmdbuffer));
94 if (!access_ok(VERIFY_WRITE, cmdbuffer, sizeof(*cmdbuffer))
95 || __put_user((int __user *)(unsigned long)cmdbuffer32.buf,
96 &cmdbuffer->buf)
97 || __put_user(cmdbuffer32.sz, &cmdbuffer->sz)
98 || __put_user(cmdbuffer32.DR1, &cmdbuffer->DR1)
99 || __put_user(cmdbuffer32.DR4, &cmdbuffer->DR4)
100 || __put_user(cmdbuffer32.num_cliprects, &cmdbuffer->num_cliprects)
101 || __put_user((int __user *)(unsigned long)cmdbuffer32.cliprects,
102 &cmdbuffer->cliprects))
103 return -EFAULT;
104
105 return drm_ioctl(file, DRM_IOCTL_I915_CMDBUFFER,
106 (unsigned long)cmdbuffer);
107}
108
109typedef struct drm_i915_irq_emit32 {
110 u32 irq_seq;
111} drm_i915_irq_emit32_t;
112
113static int compat_i915_irq_emit(struct file *file, unsigned int cmd,
114 unsigned long arg)
115{
116 drm_i915_irq_emit32_t req32;
117 drm_i915_irq_emit_t __user *request;
118
119 if (copy_from_user(&req32, (void __user *)arg, sizeof(req32)))
120 return -EFAULT;
121
122 request = compat_alloc_user_space(sizeof(*request));
123 if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
124 || __put_user((int __user *)(unsigned long)req32.irq_seq,
125 &request->irq_seq))
126 return -EFAULT;
127
128 return drm_ioctl(file, DRM_IOCTL_I915_IRQ_EMIT,
129 (unsigned long)request);
130}
131typedef struct drm_i915_getparam32 {
132 int param;
133 u32 value;
134} drm_i915_getparam32_t;
135
136static int compat_i915_getparam(struct file *file, unsigned int cmd,
137 unsigned long arg)
138{
139 drm_i915_getparam32_t req32;
140 drm_i915_getparam_t __user *request;
141
142 if (copy_from_user(&req32, (void __user *)arg, sizeof(req32)))
143 return -EFAULT;
144
145 request = compat_alloc_user_space(sizeof(*request));
146 if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
147 || __put_user(req32.param, &request->param)
148 || __put_user((void __user *)(unsigned long)req32.value,
149 &request->value))
150 return -EFAULT;
151
152 return drm_ioctl(file, DRM_IOCTL_I915_GETPARAM,
153 (unsigned long)request);
154}
155
156typedef struct drm_i915_mem_alloc32 {
157 int region;
158 int alignment;
159 int size;
160 u32 region_offset; /* offset from start of fb or agp */
161} drm_i915_mem_alloc32_t;
162
163static int compat_i915_alloc(struct file *file, unsigned int cmd,
164 unsigned long arg)
165{
166 drm_i915_mem_alloc32_t req32;
167 drm_i915_mem_alloc_t __user *request;
168
169 if (copy_from_user(&req32, (void __user *)arg, sizeof(req32)))
170 return -EFAULT;
171
172 request = compat_alloc_user_space(sizeof(*request));
173 if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
174 || __put_user(req32.region, &request->region)
175 || __put_user(req32.alignment, &request->alignment)
176 || __put_user(req32.size, &request->size)
177 || __put_user((void __user *)(unsigned long)req32.region_offset,
178 &request->region_offset))
179 return -EFAULT;
180
181 return drm_ioctl(file, DRM_IOCTL_I915_ALLOC,
182 (unsigned long)request);
183}
184
185static drm_ioctl_compat_t *i915_compat_ioctls[] = {
186 [DRM_I915_BATCHBUFFER] = compat_i915_batchbuffer,
187 [DRM_I915_CMDBUFFER] = compat_i915_cmdbuffer,
188 [DRM_I915_GETPARAM] = compat_i915_getparam,
189 [DRM_I915_IRQ_EMIT] = compat_i915_irq_emit,
190 [DRM_I915_ALLOC] = compat_i915_alloc
191};
192
193#ifdef CONFIG_COMPAT
194/**
195 * Called whenever a 32-bit process running under a 64-bit kernel
196 * performs an ioctl on /dev/dri/card<n>.
197 *
198 * \param filp file pointer.
199 * \param cmd command.
200 * \param arg user argument.
201 * \return zero on success or negative number on failure.
202 */
203long i915_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
204{
205 unsigned int nr = DRM_IOCTL_NR(cmd);
206 drm_ioctl_compat_t *fn = NULL;
207 int ret;
208
209 if (nr < DRM_COMMAND_BASE)
210 return drm_compat_ioctl(filp, cmd, arg);
211
212 if (nr < DRM_COMMAND_BASE + DRM_ARRAY_SIZE(i915_compat_ioctls))
213 fn = i915_compat_ioctls[nr - DRM_COMMAND_BASE];
214
215 if (fn != NULL)
216 ret = (*fn) (filp, cmd, arg);
217 else
218 ret = drm_ioctl(filp, cmd, arg);
219
220 return ret;
221}
222#endif