Merge branch 'master' of ssh://master.kernel.org/pub/scm/linux/kernel/git/linville...
[pandora-kernel.git] / drivers / gpu / drm / i915 / i915_ioc32.c
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
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? */
44         u32 cliprects;          /* pointer to userspace cliprects */
45 } drm_i915_batchbuffer32_t;
46
47 static 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
73 typedef 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
82 static 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
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,
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 }
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,
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
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,
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
184 drm_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  */
201 long 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 }