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 }