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 #include <linux/ioctl32.h>
  32
  33 #include "drmP.h"
  34 #include "drm.h"
  35 #include "radeon_drm.h"
  36 #include "radeon_drv.h"
  37
  38 typedef struct drm_radeon_init32 {
  39         int func;
  40         u32 sarea_priv_offset;
  41         int is_pci;
  42         int cp_mode;
  43         int gart_size;
  44         int ring_size;
  45         int usec_timeout;
  46
  47         unsigned int fb_bpp;
  48         unsigned int front_offset, front_pitch;
  49         unsigned int back_offset, back_pitch;
  50         unsigned int depth_bpp;
  51         unsigned int depth_offset, depth_pitch;
  52
  53         u32 fb_offset;
  54         u32 mmio_offset;
  55         u32 ring_offset;
  56         u32 ring_rptr_offset;
  57         u32 buffers_offset;
  58         u32 gart_textures_offset;
  59 } drm_radeon_init32_t;
  60
  61 static int compat_radeon_cp_init(struct file *file, unsigned int cmd,
  62                                  unsigned long arg)
  63 {
  64         drm_radeon_init32_t init32;
  65         drm_radeon_init_t __user *init;
  66
  67         if (copy_from_user(&init32, (void __user *)arg, sizeof(init32)))
  68                 return -EFAULT;
  69
  70         init = compat_alloc_user_space(sizeof(*init));
  71         if (!access_ok(VERIFY_WRITE, init, sizeof(*init))
  72             || __put_user(init32.func, &init->func)
  73             || __put_user(init32.sarea_priv_offset, &init->sarea_priv_offset)
  74             || __put_user(init32.is_pci, &init->is_pci)
  75             || __put_user(init32.cp_mode, &init->cp_mode)
  76             || __put_user(init32.gart_size, &init->gart_size)
  77             || __put_user(init32.ring_size, &init->ring_size)
  78             || __put_user(init32.usec_timeout, &init->usec_timeout)
  79             || __put_user(init32.fb_bpp, &init->fb_bpp)
  80             || __put_user(init32.front_offset, &init->front_offset)
  81             || __put_user(init32.front_pitch, &init->front_pitch)
  82             || __put_user(init32.back_offset, &init->back_offset)
  83             || __put_user(init32.back_pitch, &init->back_pitch)
  84             || __put_user(init32.depth_bpp, &init->depth_bpp)
  85             || __put_user(init32.depth_offset, &init->depth_offset)
  86             || __put_user(init32.depth_pitch, &init->depth_pitch)
  87             || __put_user(init32.fb_offset, &init->fb_offset)
  88             || __put_user(init32.mmio_offset, &init->mmio_offset)
  89             || __put_user(init32.ring_offset, &init->ring_offset)
  90             || __put_user(init32.ring_rptr_offset, &init->ring_rptr_offset)
  91             || __put_user(init32.buffers_offset, &init->buffers_offset)
  92             || __put_user(init32.gart_textures_offset,
  93                           &init->gart_textures_offset))
  94                 return -EFAULT;
  95
  96         return drm_ioctl(file->f_dentry->d_inode, file,
  97                          DRM_IOCTL_RADEON_CP_INIT, (unsigned long) init);
  98 }
  99
 100 typedef struct drm_radeon_clear32 {
 101         unsigned int flags;
 102         unsigned int clear_color;
 103         unsigned int clear_depth;
 104         unsigned int color_mask;
 105         unsigned int depth_mask;   /* misnamed field:  should be stencil */
 106         u32          depth_boxes;
 107 } drm_radeon_clear32_t;
 108
 109 static int compat_radeon_cp_clear(struct file *file, unsigned int cmd,
 110                                   unsigned long arg)
 111 {
 112         drm_radeon_clear32_t clr32;
 113         drm_radeon_clear_t __user *clr;
 114
 115         if (copy_from_user(&clr32, (void __user *)arg, sizeof(clr32)))
 116                 return -EFAULT;
 117
 118         clr = compat_alloc_user_space(sizeof(*clr));
 119         if (!access_ok(VERIFY_WRITE, clr, sizeof(*clr))
 120             || __put_user(clr32.flags, &clr->flags)
 121             || __put_user(clr32.clear_color, &clr->clear_color)
 122             || __put_user(clr32.clear_depth, &clr->clear_depth)
 123             || __put_user(clr32.color_mask, &clr->color_mask)
 124             || __put_user(clr32.depth_mask, &clr->depth_mask)
 125             || __put_user((void __user *)(unsigned long)clr32.depth_boxes,
 126                           &clr->depth_boxes))
 127                 return -EFAULT;
 128
 129         return drm_ioctl(file->f_dentry->d_inode, file,
 130                          DRM_IOCTL_RADEON_CLEAR, (unsigned long) clr);
 131 }
 132
 133 typedef struct drm_radeon_stipple32 {
 134         u32 mask;
 135 } drm_radeon_stipple32_t;
 136
 137 static int compat_radeon_cp_stipple(struct file *file, unsigned int cmd,
 138                                     unsigned long arg)
 139 {
 140         drm_radeon_stipple32_t __user *argp = (void __user *) arg;
 141         drm_radeon_stipple_t __user *request;
 142         u32 mask;
 143
 144         if (get_user(mask, &argp->mask))
 145                 return -EFAULT;
 146
 147         request = compat_alloc_user_space(sizeof(*request));
 148         if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
 149             || __put_user((unsigned int __user *)(unsigned long) mask,
 150                           &request->mask))
 151                 return -EFAULT;
 152
 153         return drm_ioctl(file->f_dentry->d_inode, file,
 154                          DRM_IOCTL_RADEON_STIPPLE, (unsigned long) request);
 155 }
 156
 157 typedef struct drm_radeon_tex_image32 {
 158         unsigned int x, y;              /* Blit coordinates */
 159         unsigned int width, height;
 160         u32 data;
 161 } drm_radeon_tex_image32_t;
 162
 163 typedef struct drm_radeon_texture32 {
 164         unsigned int offset;
 165         int pitch;
 166         int format;
 167         int width;                      /* Texture image coordinates */
 168         int height;
 169         u32 image;
 170 } drm_radeon_texture32_t;
 171
 172 static int compat_radeon_cp_texture(struct file *file, unsigned int cmd,
 173                                     unsigned long arg)
 174 {
 175         drm_radeon_texture32_t req32;
 176         drm_radeon_texture_t __user *request;
 177         drm_radeon_tex_image32_t img32;
 178         drm_radeon_tex_image_t __user *image;
 179
 180         if (copy_from_user(&req32, (void __user *) arg, sizeof(req32)))
 181                 return -EFAULT;
 182         if (req32.image == 0)
 183                 return -EINVAL;
 184         if (copy_from_user(&img32, (void __user *)(unsigned long)req32.image,
 185                            sizeof(img32)))
 186                 return -EFAULT;
 187
 188         request = compat_alloc_user_space(sizeof(*request) + sizeof(*image));
 189         if (!access_ok(VERIFY_WRITE, request,
 190                        sizeof(*request) + sizeof(*image)))
 191                 return -EFAULT;
 192         image = (drm_radeon_tex_image_t __user *) (request + 1);
 193
 194         if (__put_user(req32.offset, &request->offset)
 195             || __put_user(req32.pitch, &request->pitch)
 196             || __put_user(req32.format, &request->format)
 197             || __put_user(req32.width, &request->width)
 198             || __put_user(req32.height, &request->height)
 199             || __put_user(image, &request->image)
 200             || __put_user(img32.x, &image->x)
 201             || __put_user(img32.y, &image->y)
 202             || __put_user(img32.width, &image->width)
 203             || __put_user(img32.height, &image->height)
 204             || __put_user((const void __user *)(unsigned long)img32.data,
 205                           &image->data))
 206                 return -EFAULT;
 207
 208         return drm_ioctl(file->f_dentry->d_inode, file,
 209                          DRM_IOCTL_RADEON_TEXTURE, (unsigned long) request);
 210 }
 211
 212 typedef struct drm_radeon_vertex2_32 {
 213         int idx;                        /* Index of vertex buffer */
 214         int discard;                    /* Client finished with buffer? */
 215         int nr_states;
 216         u32 state;
 217         int nr_prims;
 218         u32 prim;
 219 } drm_radeon_vertex2_32_t;
 220
 221 static int compat_radeon_cp_vertex2(struct file *file, unsigned int cmd,
 222                                     unsigned long arg)
 223 {
 224         drm_radeon_vertex2_32_t req32;
 225         drm_radeon_vertex2_t __user *request;
 226
 227         if (copy_from_user(&req32, (void __user *) arg, sizeof(req32)))
 228                 return -EFAULT;
 229
 230         request = compat_alloc_user_space(sizeof(*request));
 231         if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
 232             || __put_user(req32.idx, &request->idx)
 233             || __put_user(req32.discard, &request->discard)
 234             || __put_user(req32.nr_states, &request->nr_states)
 235             || __put_user((void __user *)(unsigned long)req32.state,
 236                           &request->state)
 237             || __put_user(req32.nr_prims, &request->nr_prims)
 238             || __put_user((void __user *)(unsigned long)req32.prim,
 239                           &request->prim))
 240                 return -EFAULT;
 241
 242         return drm_ioctl(file->f_dentry->d_inode, file,
 243                          DRM_IOCTL_RADEON_VERTEX2, (unsigned long) request);
 244 }
 245
 246 typedef struct drm_radeon_cmd_buffer32 {
 247         int bufsz;
 248         u32 buf;
 249         int nbox;
 250         u32 boxes;
 251 } drm_radeon_cmd_buffer32_t;
 252
 253 static int compat_radeon_cp_cmdbuf(struct file *file, unsigned int cmd,
 254                                    unsigned long arg)
 255 {
 256         drm_radeon_cmd_buffer32_t req32;
 257         drm_radeon_cmd_buffer_t __user *request;
 258
 259         if (copy_from_user(&req32, (void __user *) arg, sizeof(req32)))
 260                 return -EFAULT;
 261
 262         request = compat_alloc_user_space(sizeof(*request));
 263         if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
 264             || __put_user(req32.bufsz, &request->bufsz)
 265             || __put_user((void __user *)(unsigned long)req32.buf,
 266                           &request->buf)
 267             || __put_user(req32.nbox, &request->nbox)
 268             || __put_user((void __user *)(unsigned long)req32.boxes,
 269                           &request->boxes))
 270                 return -EFAULT;
 271
 272         return drm_ioctl(file->f_dentry->d_inode, file,
 273                          DRM_IOCTL_RADEON_CMDBUF, (unsigned long) request);
 274 }
 275
 276 typedef struct drm_radeon_getparam32 {
 277         int param;
 278         u32 value;
 279 } drm_radeon_getparam32_t;
 280
 281 static int compat_radeon_cp_getparam(struct file *file, unsigned int cmd,
 282                                      unsigned long arg)
 283 {
 284         drm_radeon_getparam32_t req32;
 285         drm_radeon_getparam_t __user *request;
 286
 287         if (copy_from_user(&req32, (void __user *) arg, sizeof(req32)))
 288                 return -EFAULT;
 289
 290         request = compat_alloc_user_space(sizeof(*request));
 291         if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
 292             || __put_user(req32.param, &request->param)
 293             || __put_user((void __user *)(unsigned long)req32.value,
 294                           &request->value))
 295                 return -EFAULT;
 296
 297         return drm_ioctl(file->f_dentry->d_inode, file,
 298                          DRM_IOCTL_RADEON_GETPARAM, (unsigned long) request);
 299 }
 300
 301 typedef struct drm_radeon_mem_alloc32 {
 302         int region;
 303         int alignment;
 304         int size;
 305         u32 region_offset;      /* offset from start of fb or GART */
 306 } drm_radeon_mem_alloc32_t;
 307
 308 static int compat_radeon_mem_alloc(struct file *file, unsigned int cmd,
 309                                    unsigned long arg)
 310 {
 311         drm_radeon_mem_alloc32_t req32;
 312         drm_radeon_mem_alloc_t __user *request;
 313
 314         if (copy_from_user(&req32, (void __user *) arg, sizeof(req32)))
 315                 return -EFAULT;
 316
 317         request = compat_alloc_user_space(sizeof(*request));
 318         if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
 319             || __put_user(req32.region, &request->region)
 320             || __put_user(req32.alignment, &request->alignment)
 321             || __put_user(req32.size, &request->size)
 322             || __put_user((int __user *)(unsigned long)req32.region_offset,
 323                           &request->region_offset))
 324                 return -EFAULT;
 325
 326         return drm_ioctl(file->f_dentry->d_inode, file,
 327                          DRM_IOCTL_RADEON_ALLOC, (unsigned long) request);
 328 }
 329
 330 typedef struct drm_radeon_irq_emit32 {
 331         u32 irq_seq;
 332 } drm_radeon_irq_emit32_t;
 333
 334 static int compat_radeon_irq_emit(struct file *file, unsigned int cmd,
 335                                   unsigned long arg)
 336 {
 337         drm_radeon_irq_emit32_t req32;
 338         drm_radeon_irq_emit_t __user *request;
 339
 340         if (copy_from_user(&req32, (void __user *) arg, sizeof(req32)))
 341                 return -EFAULT;
 342
 343         request = compat_alloc_user_space(sizeof(*request));
 344         if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
 345             || __put_user((int __user *)(unsigned long)req32.irq_seq,
 346                           &request->irq_seq))
 347                 return -EFAULT;
 348
 349         return drm_ioctl(file->f_dentry->d_inode, file,
 350                          DRM_IOCTL_RADEON_IRQ_EMIT, (unsigned long) request);
 351 }
 352
 353 drm_ioctl_compat_t *radeon_compat_ioctls[] = {
 354         [DRM_RADEON_CP_INIT] = compat_radeon_cp_init,
 355         [DRM_RADEON_CLEAR] = compat_radeon_cp_clear,
 356         [DRM_RADEON_STIPPLE] = compat_radeon_cp_stipple,
 357         [DRM_RADEON_TEXTURE] = compat_radeon_cp_texture,
 358         [DRM_RADEON_VERTEX2] = compat_radeon_cp_vertex2,
 359         [DRM_RADEON_CMDBUF] = compat_radeon_cp_cmdbuf,
 360         [DRM_RADEON_GETPARAM] = compat_radeon_cp_getparam,
 361         [DRM_RADEON_ALLOC] = compat_radeon_mem_alloc,
 362         [DRM_RADEON_IRQ_EMIT] = compat_radeon_irq_emit,
 363 };
 364
 365 /**
 366  * Called whenever a 32-bit process running under a 64-bit kernel
 367  * performs an ioctl on /dev/dri/card<n>.
 368  *
 369  * \param filp file pointer.
 370  * \param cmd command.
 371  * \param arg user argument.
 372  * \return zero on success or negative number on failure.
 373  */
 374 long radeon_compat_ioctl(struct file *filp, unsigned int cmd,
 375                          unsigned long arg)
 376 {
 377         unsigned int nr = DRM_IOCTL_NR(cmd);
 378         drm_ioctl_compat_t *fn = NULL;
 379         int ret;
 380
 381         if (nr < DRM_COMMAND_BASE)
 382                 return drm_compat_ioctl(filp, cmd, arg);
 383
 384         if (nr < DRM_COMMAND_BASE + DRM_ARRAY_SIZE(radeon_compat_ioctls))
 385                 fn = radeon_compat_ioctls[nr - DRM_COMMAND_BASE];
 386
 387         lock_kernel();          /* XXX for now */
 388         if (fn != NULL)
 389                 ret = (*fn)(filp, cmd, arg);
 390         else
 391                 ret = drm_ioctl(filp->f_dentry->d_inode, filp, cmd, arg);
 392         unlock_kernel();
 393
 394         return ret;
 395 }