release/src-rt-6.x.4708/linux/linux-2.6.36/drivers/gpu/drm/radeon/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, DRM_IOCTL_RADEON_CP_INIT, (unsigned long)init);
  96 }
  97
  98 typedef struct drm_radeon_clear32 {
  99         unsigned int flags;
 100         unsigned int clear_color;
 101         unsigned int clear_depth;
 102         unsigned int color_mask;
 103         unsigned int depth_mask;        /* misnamed field:  should be stencil */
 104         u32 depth_boxes;
 105 } drm_radeon_clear32_t;
 106
 107 static int compat_radeon_cp_clear(struct file *file, unsigned int cmd,
 108                                   unsigned long arg)
 109 {
 110         drm_radeon_clear32_t clr32;
 111         drm_radeon_clear_t __user *clr;
 112
 113         if (copy_from_user(&clr32, (void __user *)arg, sizeof(clr32)))
 114                 return -EFAULT;
 115
 116         clr = compat_alloc_user_space(sizeof(*clr));
 117         if (!access_ok(VERIFY_WRITE, clr, sizeof(*clr))
 118             || __put_user(clr32.flags, &clr->flags)
 119             || __put_user(clr32.clear_color, &clr->clear_color)
 120             || __put_user(clr32.clear_depth, &clr->clear_depth)
 121             || __put_user(clr32.color_mask, &clr->color_mask)
 122             || __put_user(clr32.depth_mask, &clr->depth_mask)
 123             || __put_user((void __user *)(unsigned long)clr32.depth_boxes,
 124                           &clr->depth_boxes))
 125                 return -EFAULT;
 126
 127         return drm_ioctl(file, DRM_IOCTL_RADEON_CLEAR, (unsigned long)clr);
 128 }
 129
 130 typedef struct drm_radeon_stipple32 {
 131         u32 mask;
 132 } drm_radeon_stipple32_t;
 133
 134 static int compat_radeon_cp_stipple(struct file *file, unsigned int cmd,
 135                                     unsigned long arg)
 136 {
 137         drm_radeon_stipple32_t __user *argp = (void __user *)arg;
 138         drm_radeon_stipple_t __user *request;
 139         u32 mask;
 140
 141         if (get_user(mask, &argp->mask))
 142                 return -EFAULT;
 143
 144         request = compat_alloc_user_space(sizeof(*request));
 145         if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
 146             || __put_user((unsigned int __user *)(unsigned long)mask,
 147                           &request->mask))
 148                 return -EFAULT;
 149
 150         return drm_ioctl(file, DRM_IOCTL_RADEON_STIPPLE, (unsigned long)request);
 151 }
 152
 153 typedef struct drm_radeon_tex_image32 {
 154         unsigned int x, y;      /* Blit coordinates */
 155         unsigned int width, height;
 156         u32 data;
 157 } drm_radeon_tex_image32_t;
 158
 159 typedef struct drm_radeon_texture32 {
 160         unsigned int offset;
 161         int pitch;
 162         int format;
 163         int width;              /* Texture image coordinates */
 164         int height;
 165         u32 image;
 166 } drm_radeon_texture32_t;
 167
 168 static int compat_radeon_cp_texture(struct file *file, unsigned int cmd,
 169                                     unsigned long arg)
 170 {
 171         drm_radeon_texture32_t req32;
 172         drm_radeon_texture_t __user *request;
 173         drm_radeon_tex_image32_t img32;
 174         drm_radeon_tex_image_t __user *image;
 175
 176         if (copy_from_user(&req32, (void __user *)arg, sizeof(req32)))
 177                 return -EFAULT;
 178         if (req32.image == 0)
 179                 return -EINVAL;
 180         if (copy_from_user(&img32, (void __user *)(unsigned long)req32.image,
 181                            sizeof(img32)))
 182                 return -EFAULT;
 183
 184         request = compat_alloc_user_space(sizeof(*request) + sizeof(*image));
 185         if (!access_ok(VERIFY_WRITE, request,
 186                        sizeof(*request) + sizeof(*image)))
 187                 return -EFAULT;
 188         image = (drm_radeon_tex_image_t __user *) (request + 1);
 189
 190         if (__put_user(req32.offset, &request->offset)
 191             || __put_user(req32.pitch, &request->pitch)
 192             || __put_user(req32.format, &request->format)
 193             || __put_user(req32.width, &request->width)
 194             || __put_user(req32.height, &request->height)
 195             || __put_user(image, &request->image)
 196             || __put_user(img32.x, &image->x)
 197             || __put_user(img32.y, &image->y)
 198             || __put_user(img32.width, &image->width)
 199             || __put_user(img32.height, &image->height)
 200             || __put_user((const void __user *)(unsigned long)img32.data,
 201                           &image->data))
 202                 return -EFAULT;
 203
 204         return drm_ioctl(file, DRM_IOCTL_RADEON_TEXTURE, (unsigned long)request);
 205 }
 206
 207 typedef struct drm_radeon_vertex2_32 {
 208         int idx;                /* Index of vertex buffer */
 209         int discard;            /* Client finished with buffer? */
 210         int nr_states;
 211         u32 state;
 212         int nr_prims;
 213         u32 prim;
 214 } drm_radeon_vertex2_32_t;
 215
 216 static int compat_radeon_cp_vertex2(struct file *file, unsigned int cmd,
 217                                     unsigned long arg)
 218 {
 219         drm_radeon_vertex2_32_t req32;
 220         drm_radeon_vertex2_t __user *request;
 221
 222         if (copy_from_user(&req32, (void __user *)arg, sizeof(req32)))
 223                 return -EFAULT;
 224
 225         request = compat_alloc_user_space(sizeof(*request));
 226         if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
 227             || __put_user(req32.idx, &request->idx)
 228             || __put_user(req32.discard, &request->discard)
 229             || __put_user(req32.nr_states, &request->nr_states)
 230             || __put_user((void __user *)(unsigned long)req32.state,
 231                           &request->state)
 232             || __put_user(req32.nr_prims, &request->nr_prims)
 233             || __put_user((void __user *)(unsigned long)req32.prim,
 234                           &request->prim))
 235                 return -EFAULT;
 236
 237         return drm_ioctl(file, DRM_IOCTL_RADEON_VERTEX2, (unsigned long)request);
 238 }
 239
 240 typedef struct drm_radeon_cmd_buffer32 {
 241         int bufsz;
 242         u32 buf;
 243         int nbox;
 244         u32 boxes;
 245 } drm_radeon_cmd_buffer32_t;
 246
 247 static int compat_radeon_cp_cmdbuf(struct file *file, unsigned int cmd,
 248                                    unsigned long arg)
 249 {
 250         drm_radeon_cmd_buffer32_t req32;
 251         drm_radeon_cmd_buffer_t __user *request;
 252
 253         if (copy_from_user(&req32, (void __user *)arg, sizeof(req32)))
 254                 return -EFAULT;
 255
 256         request = compat_alloc_user_space(sizeof(*request));
 257         if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
 258             || __put_user(req32.bufsz, &request->bufsz)
 259             || __put_user((void __user *)(unsigned long)req32.buf,
 260                           &request->buf)
 261             || __put_user(req32.nbox, &request->nbox)
 262             || __put_user((void __user *)(unsigned long)req32.boxes,
 263                           &request->boxes))
 264                 return -EFAULT;
 265
 266         return drm_ioctl(file, DRM_IOCTL_RADEON_CMDBUF, (unsigned long)request);
 267 }
 268
 269 typedef struct drm_radeon_getparam32 {
 270         int param;
 271         u32 value;
 272 } drm_radeon_getparam32_t;
 273
 274 static int compat_radeon_cp_getparam(struct file *file, unsigned int cmd,
 275                                      unsigned long arg)
 276 {
 277         drm_radeon_getparam32_t req32;
 278         drm_radeon_getparam_t __user *request;
 279
 280         if (copy_from_user(&req32, (void __user *)arg, sizeof(req32)))
 281                 return -EFAULT;
 282
 283         request = compat_alloc_user_space(sizeof(*request));
 284         if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
 285             || __put_user(req32.param, &request->param)
 286             || __put_user((void __user *)(unsigned long)req32.value,
 287                           &request->value))
 288                 return -EFAULT;
 289
 290         return drm_ioctl(file, DRM_IOCTL_RADEON_GETPARAM, (unsigned long)request);
 291 }
 292
 293 typedef struct drm_radeon_mem_alloc32 {
 294         int region;
 295         int alignment;
 296         int size;
 297         u32 region_offset;      /* offset from start of fb or GART */
 298 } drm_radeon_mem_alloc32_t;
 299
 300 static int compat_radeon_mem_alloc(struct file *file, unsigned int cmd,
 301                                    unsigned long arg)
 302 {
 303         drm_radeon_mem_alloc32_t req32;
 304         drm_radeon_mem_alloc_t __user *request;
 305
 306         if (copy_from_user(&req32, (void __user *)arg, sizeof(req32)))
 307                 return -EFAULT;
 308
 309         request = compat_alloc_user_space(sizeof(*request));
 310         if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
 311             || __put_user(req32.region, &request->region)
 312             || __put_user(req32.alignment, &request->alignment)
 313             || __put_user(req32.size, &request->size)
 314             || __put_user((int __user *)(unsigned long)req32.region_offset,
 315                           &request->region_offset))
 316                 return -EFAULT;
 317
 318         return drm_ioctl(file, DRM_IOCTL_RADEON_ALLOC, (unsigned long)request);
 319 }
 320
 321 typedef struct drm_radeon_irq_emit32 {
 322         u32 irq_seq;
 323 } drm_radeon_irq_emit32_t;
 324
 325 static int compat_radeon_irq_emit(struct file *file, unsigned int cmd,
 326                                   unsigned long arg)
 327 {
 328         drm_radeon_irq_emit32_t req32;
 329         drm_radeon_irq_emit_t __user *request;
 330
 331         if (copy_from_user(&req32, (void __user *)arg, sizeof(req32)))
 332                 return -EFAULT;
 333
 334         request = compat_alloc_user_space(sizeof(*request));
 335         if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
 336             || __put_user((int __user *)(unsigned long)req32.irq_seq,
 337                           &request->irq_seq))
 338                 return -EFAULT;
 339
 340         return drm_ioctl(file, DRM_IOCTL_RADEON_IRQ_EMIT, (unsigned long)request);
 341 }
 342
 343 /* The two 64-bit arches where alignof(u64)==4 in 32-bit code */
 344 #if defined(CONFIG_X86_64) || defined(CONFIG_IA64)
 345 typedef struct drm_radeon_setparam32 {
 346         int param;
 347         u64 value;
 348 } __attribute__((packed)) drm_radeon_setparam32_t;
 349
 350 static int compat_radeon_cp_setparam(struct file *file, unsigned int cmd,
 351                                      unsigned long arg)
 352 {
 353         drm_radeon_setparam32_t req32;
 354         drm_radeon_setparam_t __user *request;
 355
 356         if (copy_from_user(&req32, (void __user *) arg, sizeof(req32)))
 357                 return -EFAULT;
 358
 359         request = compat_alloc_user_space(sizeof(*request));
 360         if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
 361             || __put_user(req32.param, &request->param)
 362             || __put_user((void __user *)(unsigned long)req32.value,
 363                           &request->value))
 364                 return -EFAULT;
 365
 366         return drm_ioctl(file, DRM_IOCTL_RADEON_SETPARAM, (unsigned long) request);
 367 }
 368 #else
 369 #define compat_radeon_cp_setparam NULL
 370 #endif /* X86_64 || IA64 */
 371
 372 drm_ioctl_compat_t *radeon_compat_ioctls[] = {
 373         [DRM_RADEON_CP_INIT] = compat_radeon_cp_init,
 374         [DRM_RADEON_CLEAR] = compat_radeon_cp_clear,
 375         [DRM_RADEON_STIPPLE] = compat_radeon_cp_stipple,
 376         [DRM_RADEON_TEXTURE] = compat_radeon_cp_texture,
 377         [DRM_RADEON_VERTEX2] = compat_radeon_cp_vertex2,
 378         [DRM_RADEON_CMDBUF] = compat_radeon_cp_cmdbuf,
 379         [DRM_RADEON_GETPARAM] = compat_radeon_cp_getparam,
 380         [DRM_RADEON_SETPARAM] = compat_radeon_cp_setparam,
 381         [DRM_RADEON_ALLOC] = compat_radeon_mem_alloc,
 382         [DRM_RADEON_IRQ_EMIT] = compat_radeon_irq_emit,
 383 };
 384
 385 /**
 386  * Called whenever a 32-bit process running under a 64-bit kernel
 387  * performs an ioctl on /dev/dri/card<n>.
 388  *
 389  * \param filp file pointer.
 390  * \param cmd command.
 391  * \param arg user argument.
 392  * \return zero on success or negative number on failure.
 393  */
 394 long radeon_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 395 {
 396         unsigned int nr = DRM_IOCTL_NR(cmd);
 397         drm_ioctl_compat_t *fn = NULL;
 398         int ret;
 399
 400         if (nr < DRM_COMMAND_BASE)
 401                 return drm_compat_ioctl(filp, cmd, arg);
 402
 403         if (nr < DRM_COMMAND_BASE + DRM_ARRAY_SIZE(radeon_compat_ioctls))
 404                 fn = radeon_compat_ioctls[nr - DRM_COMMAND_BASE];
 405
 406         if (fn != NULL)
 407                 ret = (*fn) (filp, cmd, arg);
 408         else
 409                 ret = drm_ioctl(filp, cmd, arg);
 410
 411         return ret;
 412 }
 413
 414 long radeon_kms_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 415 {
 416         unsigned int nr = DRM_IOCTL_NR(cmd);
 417         int ret;
 418
 419         if (nr < DRM_COMMAND_BASE)
 420                 return drm_compat_ioctl(filp, cmd, arg);
 421
 422         ret = drm_ioctl(filp, cmd, arg);
 423
 424         return ret;
 425 }