Merge branch 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik...
[linux-2.6] / drivers / char / drm / radeon_ioc32.c
1 /**
2  * \file radeon_ioc32.c
3  *
4  * 32-bit ioctl compatibility routines for the Radeon DRM.
5  *
6  * \author Paul Mackerras <paulus@samba.org>
7  *
8  * Copyright (C) Paul Mackerras 2005
9  * All Rights Reserved.
10  *
11  * Permission is hereby granted, free of charge, to any person obtaining a
12  * copy of this software and associated documentation files (the "Software"),
13  * to deal in the Software without restriction, including without limitation
14  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
15  * and/or sell copies of the Software, and to permit persons to whom the
16  * Software is furnished to do so, subject to the following conditions:
17  *
18  * The above copyright notice and this permission notice (including the next
19  * paragraph) shall be included in all copies or substantial portions of the
20  * Software.
21  *
22  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
23  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
24  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
25  * THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
26  * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
27  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
28  * IN THE SOFTWARE.
29  */
30 #include <linux/compat.h>
31
32 #include "drmP.h"
33 #include "drm.h"
34 #include "radeon_drm.h"
35 #include "radeon_drv.h"
36
37 typedef struct drm_radeon_init32 {
38         int func;
39         u32 sarea_priv_offset;
40         int is_pci;
41         int cp_mode;
42         int gart_size;
43         int ring_size;
44         int usec_timeout;
45
46         unsigned int fb_bpp;
47         unsigned int front_offset, front_pitch;
48         unsigned int back_offset, back_pitch;
49         unsigned int depth_bpp;
50         unsigned int depth_offset, depth_pitch;
51
52         u32 fb_offset;
53         u32 mmio_offset;
54         u32 ring_offset;
55         u32 ring_rptr_offset;
56         u32 buffers_offset;
57         u32 gart_textures_offset;
58 } drm_radeon_init32_t;
59
60 static int compat_radeon_cp_init(struct file *file, unsigned int cmd,
61                                  unsigned long arg)
62 {
63         drm_radeon_init32_t init32;
64         drm_radeon_init_t __user *init;
65
66         if (copy_from_user(&init32, (void __user *)arg, sizeof(init32)))
67                 return -EFAULT;
68
69         init = compat_alloc_user_space(sizeof(*init));
70         if (!access_ok(VERIFY_WRITE, init, sizeof(*init))
71             || __put_user(init32.func, &init->func)
72             || __put_user(init32.sarea_priv_offset, &init->sarea_priv_offset)
73             || __put_user(init32.is_pci, &init->is_pci)
74             || __put_user(init32.cp_mode, &init->cp_mode)
75             || __put_user(init32.gart_size, &init->gart_size)
76             || __put_user(init32.ring_size, &init->ring_size)
77             || __put_user(init32.usec_timeout, &init->usec_timeout)
78             || __put_user(init32.fb_bpp, &init->fb_bpp)
79             || __put_user(init32.front_offset, &init->front_offset)
80             || __put_user(init32.front_pitch, &init->front_pitch)
81             || __put_user(init32.back_offset, &init->back_offset)
82             || __put_user(init32.back_pitch, &init->back_pitch)
83             || __put_user(init32.depth_bpp, &init->depth_bpp)
84             || __put_user(init32.depth_offset, &init->depth_offset)
85             || __put_user(init32.depth_pitch, &init->depth_pitch)
86             || __put_user(init32.fb_offset, &init->fb_offset)
87             || __put_user(init32.mmio_offset, &init->mmio_offset)
88             || __put_user(init32.ring_offset, &init->ring_offset)
89             || __put_user(init32.ring_rptr_offset, &init->ring_rptr_offset)
90             || __put_user(init32.buffers_offset, &init->buffers_offset)
91             || __put_user(init32.gart_textures_offset,
92                           &init->gart_textures_offset))
93                 return -EFAULT;
94
95         return drm_ioctl(file->f_path.dentry->d_inode, file,
96                          DRM_IOCTL_RADEON_CP_INIT, (unsigned long)init);
97 }
98
99 typedef struct drm_radeon_clear32 {
100         unsigned int flags;
101         unsigned int clear_color;
102         unsigned int clear_depth;
103         unsigned int color_mask;
104         unsigned int depth_mask;        /* misnamed field:  should be stencil */
105         u32 depth_boxes;
106 } drm_radeon_clear32_t;
107
108 static int compat_radeon_cp_clear(struct file *file, unsigned int cmd,
109                                   unsigned long arg)
110 {
111         drm_radeon_clear32_t clr32;
112         drm_radeon_clear_t __user *clr;
113
114         if (copy_from_user(&clr32, (void __user *)arg, sizeof(clr32)))
115                 return -EFAULT;
116
117         clr = compat_alloc_user_space(sizeof(*clr));
118         if (!access_ok(VERIFY_WRITE, clr, sizeof(*clr))
119             || __put_user(clr32.flags, &clr->flags)
120             || __put_user(clr32.clear_color, &clr->clear_color)
121             || __put_user(clr32.clear_depth, &clr->clear_depth)
122             || __put_user(clr32.color_mask, &clr->color_mask)
123             || __put_user(clr32.depth_mask, &clr->depth_mask)
124             || __put_user((void __user *)(unsigned long)clr32.depth_boxes,
125                           &clr->depth_boxes))
126                 return -EFAULT;
127
128         return drm_ioctl(file->f_path.dentry->d_inode, file,
129                          DRM_IOCTL_RADEON_CLEAR, (unsigned long)clr);
130 }
131
132 typedef struct drm_radeon_stipple32 {
133         u32 mask;
134 } drm_radeon_stipple32_t;
135
136 static int compat_radeon_cp_stipple(struct file *file, unsigned int cmd,
137                                     unsigned long arg)
138 {
139         drm_radeon_stipple32_t __user *argp = (void __user *)arg;
140         drm_radeon_stipple_t __user *request;
141         u32 mask;
142
143         if (get_user(mask, &argp->mask))
144                 return -EFAULT;
145
146         request = compat_alloc_user_space(sizeof(*request));
147         if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
148             || __put_user((unsigned int __user *)(unsigned long)mask,
149                           &request->mask))
150                 return -EFAULT;
151
152         return drm_ioctl(file->f_path.dentry->d_inode, file,
153                          DRM_IOCTL_RADEON_STIPPLE, (unsigned long)request);
154 }
155
156 typedef struct drm_radeon_tex_image32 {
157         unsigned int x, y;      /* Blit coordinates */
158         unsigned int width, height;
159         u32 data;
160 } drm_radeon_tex_image32_t;
161
162 typedef struct drm_radeon_texture32 {
163         unsigned int offset;
164         int pitch;
165         int format;
166         int width;              /* Texture image coordinates */
167         int height;
168         u32 image;
169 } drm_radeon_texture32_t;
170
171 static int compat_radeon_cp_texture(struct file *file, unsigned int cmd,
172                                     unsigned long arg)
173 {
174         drm_radeon_texture32_t req32;
175         drm_radeon_texture_t __user *request;
176         drm_radeon_tex_image32_t img32;
177         drm_radeon_tex_image_t __user *image;
178
179         if (copy_from_user(&req32, (void __user *)arg, sizeof(req32)))
180                 return -EFAULT;
181         if (req32.image == 0)
182                 return -EINVAL;
183         if (copy_from_user(&img32, (void __user *)(unsigned long)req32.image,
184                            sizeof(img32)))
185                 return -EFAULT;
186
187         request = compat_alloc_user_space(sizeof(*request) + sizeof(*image));
188         if (!access_ok(VERIFY_WRITE, request,
189                        sizeof(*request) + sizeof(*image)))
190                 return -EFAULT;
191         image = (drm_radeon_tex_image_t __user *) (request + 1);
192
193         if (__put_user(req32.offset, &request->offset)
194             || __put_user(req32.pitch, &request->pitch)
195             || __put_user(req32.format, &request->format)
196             || __put_user(req32.width, &request->width)
197             || __put_user(req32.height, &request->height)
198             || __put_user(image, &request->image)
199             || __put_user(img32.x, &image->x)
200             || __put_user(img32.y, &image->y)
201             || __put_user(img32.width, &image->width)
202             || __put_user(img32.height, &image->height)
203             || __put_user((const void __user *)(unsigned long)img32.data,
204                           &image->data))
205                 return -EFAULT;
206
207         return drm_ioctl(file->f_path.dentry->d_inode, file,
208                          DRM_IOCTL_RADEON_TEXTURE, (unsigned long)request);
209 }
210
211 typedef struct drm_radeon_vertex2_32 {
212         int idx;                /* Index of vertex buffer */
213         int discard;            /* Client finished with buffer? */
214         int nr_states;
215         u32 state;
216         int nr_prims;
217         u32 prim;
218 } drm_radeon_vertex2_32_t;
219
220 static int compat_radeon_cp_vertex2(struct file *file, unsigned int cmd,
221                                     unsigned long arg)
222 {
223         drm_radeon_vertex2_32_t req32;
224         drm_radeon_vertex2_t __user *request;
225
226         if (copy_from_user(&req32, (void __user *)arg, sizeof(req32)))
227                 return -EFAULT;
228
229         request = compat_alloc_user_space(sizeof(*request));
230         if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
231             || __put_user(req32.idx, &request->idx)
232             || __put_user(req32.discard, &request->discard)
233             || __put_user(req32.nr_states, &request->nr_states)
234             || __put_user((void __user *)(unsigned long)req32.state,
235                           &request->state)
236             || __put_user(req32.nr_prims, &request->nr_prims)
237             || __put_user((void __user *)(unsigned long)req32.prim,
238                           &request->prim))
239                 return -EFAULT;
240
241         return drm_ioctl(file->f_path.dentry->d_inode, file,
242                          DRM_IOCTL_RADEON_VERTEX2, (unsigned long)request);
243 }
244
245 typedef struct drm_radeon_cmd_buffer32 {
246         int bufsz;
247         u32 buf;
248         int nbox;
249         u32 boxes;
250 } drm_radeon_cmd_buffer32_t;
251
252 static int compat_radeon_cp_cmdbuf(struct file *file, unsigned int cmd,
253                                    unsigned long arg)
254 {
255         drm_radeon_cmd_buffer32_t req32;
256         drm_radeon_cmd_buffer_t __user *request;
257
258         if (copy_from_user(&req32, (void __user *)arg, sizeof(req32)))
259                 return -EFAULT;
260
261         request = compat_alloc_user_space(sizeof(*request));
262         if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
263             || __put_user(req32.bufsz, &request->bufsz)
264             || __put_user((void __user *)(unsigned long)req32.buf,
265                           &request->buf)
266             || __put_user(req32.nbox, &request->nbox)
267             || __put_user((void __user *)(unsigned long)req32.boxes,
268                           &request->boxes))
269                 return -EFAULT;
270
271         return drm_ioctl(file->f_path.dentry->d_inode, file,
272                          DRM_IOCTL_RADEON_CMDBUF, (unsigned long)request);
273 }
274
275 typedef struct drm_radeon_getparam32 {
276         int param;
277         u32 value;
278 } drm_radeon_getparam32_t;
279
280 static int compat_radeon_cp_getparam(struct file *file, unsigned int cmd,
281                                      unsigned long arg)
282 {
283         drm_radeon_getparam32_t req32;
284         drm_radeon_getparam_t __user *request;
285
286         if (copy_from_user(&req32, (void __user *)arg, sizeof(req32)))
287                 return -EFAULT;
288
289         request = compat_alloc_user_space(sizeof(*request));
290         if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
291             || __put_user(req32.param, &request->param)
292             || __put_user((void __user *)(unsigned long)req32.value,
293                           &request->value))
294                 return -EFAULT;
295
296         return drm_ioctl(file->f_path.dentry->d_inode, file,
297                          DRM_IOCTL_RADEON_GETPARAM, (unsigned long)request);
298 }
299
300 typedef struct drm_radeon_mem_alloc32 {
301         int region;
302         int alignment;
303         int size;
304         u32 region_offset;      /* offset from start of fb or GART */
305 } drm_radeon_mem_alloc32_t;
306
307 static int compat_radeon_mem_alloc(struct file *file, unsigned int cmd,
308                                    unsigned long arg)
309 {
310         drm_radeon_mem_alloc32_t req32;
311         drm_radeon_mem_alloc_t __user *request;
312
313         if (copy_from_user(&req32, (void __user *)arg, sizeof(req32)))
314                 return -EFAULT;
315
316         request = compat_alloc_user_space(sizeof(*request));
317         if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
318             || __put_user(req32.region, &request->region)
319             || __put_user(req32.alignment, &request->alignment)
320             || __put_user(req32.size, &request->size)
321             || __put_user((int __user *)(unsigned long)req32.region_offset,
322                           &request->region_offset))
323                 return -EFAULT;
324
325         return drm_ioctl(file->f_path.dentry->d_inode, file,
326                          DRM_IOCTL_RADEON_ALLOC, (unsigned long)request);
327 }
328
329 typedef struct drm_radeon_irq_emit32 {
330         u32 irq_seq;
331 } drm_radeon_irq_emit32_t;
332
333 static int compat_radeon_irq_emit(struct file *file, unsigned int cmd,
334                                   unsigned long arg)
335 {
336         drm_radeon_irq_emit32_t req32;
337         drm_radeon_irq_emit_t __user *request;
338
339         if (copy_from_user(&req32, (void __user *)arg, sizeof(req32)))
340                 return -EFAULT;
341
342         request = compat_alloc_user_space(sizeof(*request));
343         if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
344             || __put_user((int __user *)(unsigned long)req32.irq_seq,
345                           &request->irq_seq))
346                 return -EFAULT;
347
348         return drm_ioctl(file->f_path.dentry->d_inode, file,
349                          DRM_IOCTL_RADEON_IRQ_EMIT, (unsigned long)request);
350 }
351
352 /* The two 64-bit arches where alignof(u64)==4 in 32-bit code */
353 #if defined (CONFIG_X86_64) || defined(CONFIG_IA64)
354 typedef struct drm_radeon_setparam32 {
355         int param;
356         u64 value;
357 } __attribute__((packed)) drm_radeon_setparam32_t;
358
359 static int compat_radeon_cp_setparam(struct file *file, unsigned int cmd,
360                                      unsigned long arg)
361 {
362         drm_radeon_setparam32_t req32;
363         drm_radeon_setparam_t __user *request;
364
365         if (copy_from_user(&req32, (void __user *) arg, sizeof(req32)))
366                 return -EFAULT;
367
368         request = compat_alloc_user_space(sizeof(*request));
369         if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
370             || __put_user(req32.param, &request->param)
371             || __put_user((void __user *)(unsigned long)req32.value,
372                           &request->value))
373                 return -EFAULT;
374
375         return drm_ioctl(file->f_dentry->d_inode, file,
376                          DRM_IOCTL_RADEON_SETPARAM, (unsigned long) request);
377 }
378 #else
379 #define compat_radeon_cp_setparam NULL
380 #endif /* X86_64 || IA64 */
381
382 drm_ioctl_compat_t *radeon_compat_ioctls[] = {
383         [DRM_RADEON_CP_INIT] = compat_radeon_cp_init,
384         [DRM_RADEON_CLEAR] = compat_radeon_cp_clear,
385         [DRM_RADEON_STIPPLE] = compat_radeon_cp_stipple,
386         [DRM_RADEON_TEXTURE] = compat_radeon_cp_texture,
387         [DRM_RADEON_VERTEX2] = compat_radeon_cp_vertex2,
388         [DRM_RADEON_CMDBUF] = compat_radeon_cp_cmdbuf,
389         [DRM_RADEON_GETPARAM] = compat_radeon_cp_getparam,
390         [DRM_RADEON_SETPARAM] = compat_radeon_cp_setparam,
391         [DRM_RADEON_ALLOC] = compat_radeon_mem_alloc,
392         [DRM_RADEON_IRQ_EMIT] = compat_radeon_irq_emit,
393 };
394
395 /**
396  * Called whenever a 32-bit process running under a 64-bit kernel
397  * performs an ioctl on /dev/dri/card<n>.
398  *
399  * \param filp file pointer.
400  * \param cmd command.
401  * \param arg user argument.
402  * \return zero on success or negative number on failure.
403  */
404 long radeon_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
405 {
406         unsigned int nr = DRM_IOCTL_NR(cmd);
407         drm_ioctl_compat_t *fn = NULL;
408         int ret;
409
410         if (nr < DRM_COMMAND_BASE)
411                 return drm_compat_ioctl(filp, cmd, arg);
412
413         if (nr < DRM_COMMAND_BASE + DRM_ARRAY_SIZE(radeon_compat_ioctls))
414                 fn = radeon_compat_ioctls[nr - DRM_COMMAND_BASE];
415
416         lock_kernel();          /* XXX for now */
417         if (fn != NULL)
418                 ret = (*fn) (filp, cmd, arg);
419         else
420                 ret = drm_ioctl(filp->f_path.dentry->d_inode, filp, cmd, arg);
421         unlock_kernel();
422
423         return ret;
424 }