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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 "drmP.h"
35#include "drm.h"
36#include "i915_drm.h"
37
38typedef 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? */
44 u32 cliprects; /* pointer to userspace cliprects */
45} drm_i915_batchbuffer32_t;
46
47static int compat_i915_batchbuffer(struct file *file, unsigned int cmd,
48 unsigned long arg)
49{
50 drm_i915_batchbuffer32_t batchbuffer32;
51 drm_i915_batchbuffer_t __user *batchbuffer;
52
53 if (copy_from_user
54 (&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,
64 &batchbuffer->num_cliprects)
65 || __put_user((int __user *)(unsigned long)batchbuffer32.cliprects,
66 &batchbuffer->cliprects))
67 return -EFAULT;
68
69 return drm_ioctl(file, DRM_IOCTL_I915_BATCHBUFFER,
70 (unsigned long)batchbuffer);
71}
72
73typedef struct _drm_i915_cmdbuffer32 {
74 u32 buf; /* pointer to userspace command buffer */
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? */
79 u32 cliprects; /* pointer to userspace cliprects */
80} drm_i915_cmdbuffer32_t;
81
82static int compat_i915_cmdbuffer(struct file *file, unsigned int cmd,
83 unsigned long arg)
84{
85 drm_i915_cmdbuffer32_t cmdbuffer32;
86 drm_i915_cmdbuffer_t __user *cmdbuffer;
87
88 if (copy_from_user
89 (&cmdbuffer32, (void __user *)arg, sizeof(cmdbuffer32)))
90 return -EFAULT;
91
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;
103
104 return drm_ioctl(file, DRM_IOCTL_I915_CMDBUFFER,
105 (unsigned long)cmdbuffer);
106}
107
108typedef struct drm_i915_irq_emit32 {
109 u32 irq_seq;
110} drm_i915_irq_emit32_t;
111
112static int compat_i915_irq_emit(struct file *file, unsigned int cmd,
113 unsigned long arg)
114{
115 drm_i915_irq_emit32_t req32;
116 drm_i915_irq_emit_t __user *request;
117
118 if (copy_from_user(&req32, (void __user *)arg, sizeof(req32)))
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
127 return drm_ioctl(file, DRM_IOCTL_I915_IRQ_EMIT,
128 (unsigned long)request);
129}
130typedef struct drm_i915_getparam32 {
131 int param;
132 u32 value;
133} drm_i915_getparam32_t;
134
135static int compat_i915_getparam(struct file *file, unsigned int cmd,
136 unsigned long arg)
137{
138 drm_i915_getparam32_t req32;
139 drm_i915_getparam_t __user *request;
140
141 if (copy_from_user(&req32, (void __user *)arg, sizeof(req32)))
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
151 return drm_ioctl(file, DRM_IOCTL_I915_GETPARAM,
152 (unsigned long)request);
153}
154
155typedef 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
162static int compat_i915_alloc(struct file *file, unsigned int cmd,
163 unsigned long arg)
164{
165 drm_i915_mem_alloc32_t req32;
166 drm_i915_mem_alloc_t __user *request;
167
168 if (copy_from_user(&req32, (void __user *)arg, sizeof(req32)))
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
180 return drm_ioctl(file, DRM_IOCTL_I915_ALLOC,
181 (unsigned long)request);
182}
183
184drm_ioctl_compat_t *i915_compat_ioctls[] = {
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
192/**
193 * Called whenever a 32-bit process running under a 64-bit kernel
194 * performs an ioctl on /dev/dri/card<n>.
195 *
196 * \param filp file pointer.
197 * \param cmd command.
198 * \param arg user argument.
199 * \return zero on success or negative number on failure.
200 */
201long i915_compat_ioctl(struct file *filp, unsigned int cmd, 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 if (fn != NULL)
214 ret = (*fn) (filp, cmd, arg);
215 else
216 ret = drm_ioctl(filp, cmd, arg);
217
218 return ret;
219}
1/*
2 * 32-bit ioctl compatibility routines for the i915 DRM.
3 *
4 * Copyright (C) Paul Mackerras 2005
5 * Copyright (C) Alan Hourihane 2005
6 * All Rights Reserved.
7 *
8 * Permission is hereby granted, free of charge, to any person obtaining a
9 * copy of this software and associated documentation files (the "Software"),
10 * to deal in the Software without restriction, including without limitation
11 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
12 * and/or sell copies of the Software, and to permit persons to whom the
13 * Software is furnished to do so, subject to the following conditions:
14 *
15 * The above copyright notice and this permission notice (including the next
16 * paragraph) shall be included in all copies or substantial portions of the
17 * Software.
18 *
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
20 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
22 * THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
23 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
24 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
25 * IN THE SOFTWARE.
26 *
27 * Author: Alan Hourihane <alanh@fairlite.demon.co.uk>
28 */
29#include <linux/compat.h>
30
31#include <drm/i915_drm.h>
32#include <drm/drm_ioctl.h>
33#include "i915_drv.h"
34
35struct drm_i915_getparam32 {
36 s32 param;
37 /*
38 * We screwed up the generic ioctl struct here and used a variable-sized
39 * pointer. Use u32 in the compat struct to match the 32bit pointer
40 * userspace expects.
41 */
42 u32 value;
43};
44
45static int compat_i915_getparam(struct file *file, unsigned int cmd,
46 unsigned long arg)
47{
48 struct drm_i915_getparam32 req32;
49 drm_i915_getparam_t __user *request;
50
51 if (copy_from_user(&req32, (void __user *)arg, sizeof(req32)))
52 return -EFAULT;
53
54 request = compat_alloc_user_space(sizeof(*request));
55 if (!access_ok(request, sizeof(*request)) ||
56 __put_user(req32.param, &request->param) ||
57 __put_user((void __user *)(unsigned long)req32.value,
58 &request->value))
59 return -EFAULT;
60
61 return drm_ioctl(file, DRM_IOCTL_I915_GETPARAM,
62 (unsigned long)request);
63}
64
65static drm_ioctl_compat_t *i915_compat_ioctls[] = {
66 [DRM_I915_GETPARAM] = compat_i915_getparam,
67};
68
69/**
70 * i915_compat_ioctl - handle the mistakes of the past
71 * @filp: the file pointer
72 * @cmd: the ioctl command (and encoded flags)
73 * @arg: the ioctl argument (from userspace)
74 *
75 * Called whenever a 32-bit process running under a 64-bit kernel
76 * performs an ioctl on /dev/dri/card<n>.
77 */
78long i915_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
79{
80 unsigned int nr = DRM_IOCTL_NR(cmd);
81 drm_ioctl_compat_t *fn = NULL;
82 int ret;
83
84 if (nr < DRM_COMMAND_BASE || nr >= DRM_COMMAND_END)
85 return drm_compat_ioctl(filp, cmd, arg);
86
87 if (nr < DRM_COMMAND_BASE + ARRAY_SIZE(i915_compat_ioctls))
88 fn = i915_compat_ioctls[nr - DRM_COMMAND_BASE];
89
90 if (fn != NULL)
91 ret = (*fn) (filp, cmd, arg);
92 else
93 ret = drm_ioctl(filp, cmd, arg);
94
95 return ret;
96}