kernel/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 <drm/drmP.h>
  33 #include <drm/radeon_drm.h>
  34 #include "radeon_drv.h"
  35
  36 typedef struct drm_radeon_init32 {
  37         int func;
  38         u32 sarea_priv_offset;
  39         int is_pci;
  40         int cp_mode;
  41         int gart_size;
  42         int ring_size;
  43         int usec_timeout;
  44
  45         unsigned int fb_bpp;
  46         unsigned int front_offset, front_pitch;
  47         unsigned int back_offset, back_pitch;
  48         unsigned int depth_bpp;
  49         unsigned int depth_offset, depth_pitch;
  50
  51         u32 fb_offset;
  52         u32 mmio_offset;
  53         u32 ring_offset;
  54         u32 ring_rptr_offset;
  55         u32 buffers_offset;
  56         u32 gart_textures_offset;
  57 } drm_radeon_init32_t;
  58
  59 static int compat_radeon_cp_init(struct file *file, unsigned int cmd,
  60                                  unsigned long arg)
  61 {
  62         drm_radeon_init32_t init32;
  63         drm_radeon_init_t __user *init;
  64
  65         if (copy_from_user(&init32, (void __user *)arg, sizeof(init32)))
  66                 return -EFAULT;
  67
  68         init = compat_alloc_user_space(sizeof(*init));
  69         if (!access_ok(VERIFY_WRITE, init, sizeof(*init))
  70             || __put_user(init32.func, &init->func)
  71             || __put_user(init32.sarea_priv_offset, &init->sarea_priv_offset)
  72             || __put_user(init32.is_pci, &init->is_pci)
  73             || __put_user(init32.cp_mode, &init->cp_mode)
  74             || __put_user(init32.gart_size, &init->gart_size)
  75             || __put_user(init32.ring_size, &init->ring_size)
  76             || __put_user(init32.usec_timeout, &init->usec_timeout)
  77             || __put_user(init32.fb_bpp, &init->fb_bpp)
  78             || __put_user(init32.front_offset, &init->front_offset)
  79             || __put_user(init32.front_pitch, &init->front_pitch)
  80             || __put_user(init32.back_offset, &init->back_offset)
  81             || __put_user(init32.back_pitch, &init->back_pitch)
  82             || __put_user(init32.depth_bpp, &init->depth_bpp)
  83             || __put_user(init32.depth_offset, &init->depth_offset)
  84             || __put_user(init32.depth_pitch, &init->depth_pitch)
  85             || __put_user(init32.fb_offset, &init->fb_offset)
  86             || __put_user(init32.mmio_offset, &init->mmio_offset)
  87             || __put_user(init32.ring_offset, &init->ring_offset)
  88             || __put_user(init32.ring_rptr_offset, &init->ring_rptr_offset)
  89             || __put_user(init32.buffers_offset, &init->buffers_offset)
  90             || __put_user(init32.gart_textures_offset,
  91                           &init->gart_textures_offset))
  92                 return -EFAULT;
  93
  94         return drm_ioctl(file, DRM_IOCTL_RADEON_CP_INIT, (unsigned long)init);
  95 }
  96
  97 typedef struct drm_radeon_clear32 {
  98         unsigned int flags;
  99         unsigned int clear_color;
 100         unsigned int clear_depth;
 101         unsigned int color_mask;
 102         unsigned int depth_mask;        /* misnamed field:  should be stencil */
 103         u32 depth_boxes;
 104 } drm_radeon_clear32_t;
 105
 106 static int compat_radeon_cp_clear(struct file *file, unsigned int cmd,
 107                                   unsigned long arg)
 108 {
 109         drm_radeon_clear32_t clr32;
 110         drm_radeon_clear_t __user *clr;
 111
 112         if (copy_from_user(&clr32, (void __user *)arg, sizeof(clr32)))
 113                 return -EFAULT;
 114
 115         clr = compat_alloc_user_space(sizeof(*clr));
 116         if (!access_ok(VERIFY_WRITE, clr, sizeof(*clr))
 117             || __put_user(clr32.flags, &clr->flags)
 118             || __put_user(clr32.clear_color, &clr->clear_color)
 119             || __put_user(clr32.clear_depth, &clr->clear_depth)
 120             || __put_user(clr32.color_mask, &clr->color_mask)
 121             || __put_user(clr32.depth_mask, &clr->depth_mask)
 122             || __put_user((void __user *)(unsigned long)clr32.depth_boxes,
 123                           &clr->depth_boxes))
 124                 return -EFAULT;
 125
 126         return drm_ioctl(file, DRM_IOCTL_RADEON_CLEAR, (unsigned long)clr);
 127 }
 128
 129 typedef struct drm_radeon_stipple32 {
 130         u32 mask;
 131 } drm_radeon_stipple32_t;
 132
 133 static int compat_radeon_cp_stipple(struct file *file, unsigned int cmd,
 134                                     unsigned long arg)
 135 {
 136         drm_radeon_stipple32_t __user *argp = (void __user *)arg;
 137         drm_radeon_stipple_t __user *request;
 138         u32 mask;
 139
 140         if (get_user(mask, &argp->mask))
 141                 return -EFAULT;
 142
 143         request = compat_alloc_user_space(sizeof(*request));
 144         if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
 145             || __put_user((unsigned int __user *)(unsigned long)mask,
 146                           &request->mask))
 147                 return -EFAULT;
 148
 149         return drm_ioctl(file, DRM_IOCTL_RADEON_STIPPLE, (unsigned long)request);
 150 }
 151
 152 typedef struct drm_radeon_tex_image32 {
 153         unsigned int x, y;      /* Blit coordinates */
 154         unsigned int width, height;
 155         u32 data;
 156 } drm_radeon_tex_image32_t;
 157
 158 typedef struct drm_radeon_texture32 {
 159         unsigned int offset;
 160         int pitch;
 161         int format;
 162         int width;              /* Texture image coordinates */
 163         int height;
 164         u32 image;
 165 } drm_radeon_texture32_t;
 166
 167 static int compat_radeon_cp_texture(struct file *file, unsigned int cmd,
 168                                     unsigned long arg)
 169 {
 170         drm_radeon_texture32_t req32;
 171         drm_radeon_texture_t __user *request;
 172         drm_radeon_tex_image32_t img32;
 173         drm_radeon_tex_image_t __user *image;
 174
 175         if (copy_from_user(&req32, (void __user *)arg, sizeof(req32)))
 176                 return -EFAULT;
 177         if (req32.image == 0)
 178                 return -EINVAL;
 179         if (copy_from_user(&img32, (void __user *)(unsigned long)req32.image,
 180                            sizeof(img32)))
 181                 return -EFAULT;
 182
 183         request = compat_alloc_user_space(sizeof(*request) + sizeof(*image));
 184         if (!access_ok(VERIFY_WRITE, request,
 185                        sizeof(*request) + sizeof(*image)))
 186                 return -EFAULT;
 187         image = (drm_radeon_tex_image_t __user *) (request + 1);
 188
 189         if (__put_user(req32.offset, &request->offset)
 190             || __put_user(req32.pitch, &request->pitch)
 191             || __put_user(req32.format, &request->format)
 192             || __put_user(req32.width, &request->width)
 193             || __put_user(req32.height, &request->height)
 194             || __put_user(image, &request->image)
 195             || __put_user(img32.x, &image->x)
 196             || __put_user(img32.y, &image->y)
 197             || __put_user(img32.width, &image->width)
 198             || __put_user(img32.height, &image->height)
 199             || __put_user((const void __user *)(unsigned long)img32.data,
 200                           &image->data))
 201                 return -EFAULT;
 202
 203         return drm_ioctl(file, DRM_IOCTL_RADEON_TEXTURE, (unsigned long)request);
 204 }
 205
 206 typedef struct drm_radeon_vertex2_32 {
 207         int idx;                /* Index of vertex buffer */
 208         int discard;            /* Client finished with buffer? */
 209         int nr_states;
 210         u32 state;
 211         int nr_prims;
 212         u32 prim;
 213 } drm_radeon_vertex2_32_t;
 214
 215 static int compat_radeon_cp_vertex2(struct file *file, unsigned int cmd,
 216                                     unsigned long arg)
 217 {
 218         drm_radeon_vertex2_32_t req32;
 219         drm_radeon_vertex2_t __user *request;
 220
 221         if (copy_from_user(&req32, (void __user *)arg, sizeof(req32)))
 222                 return -EFAULT;
 223
 224         request = compat_alloc_user_space(sizeof(*request));
 225         if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
 226             || __put_user(req32.idx, &request->idx)
 227             || __put_user(req32.discard, &request->discard)
 228             || __put_user(req32.nr_states, &request->nr_states)
 229             || __put_user((void __user *)(unsigned long)req32.state,
 230                           &request->state)
 231             || __put_user(req32.nr_prims, &request->nr_prims)
 232             || __put_user((void __user *)(unsigned long)req32.prim,
 233                           &request->prim))
 234                 return -EFAULT;
 235
 236         return drm_ioctl(file, DRM_IOCTL_RADEON_VERTEX2, (unsigned long)request);
 237 }
 238
 239 typedef struct drm_radeon_cmd_buffer32 {
 240         int bufsz;
 241         u32 buf;
 242         int nbox;
 243         u32 boxes;
 244 } drm_radeon_cmd_buffer32_t;
 245
 246 static int compat_radeon_cp_cmdbuf(struct file *file, unsigned int cmd,
 247                                    unsigned long arg)
 248 {
 249         drm_radeon_cmd_buffer32_t req32;
 250         drm_radeon_cmd_buffer_t __user *request;
 251
 252         if (copy_from_user(&req32, (void __user *)arg, sizeof(req32)))
 253                 return -EFAULT;
 254
 255         request = compat_alloc_user_space(sizeof(*request));
 256         if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
 257             || __put_user(req32.bufsz, &request->bufsz)
 258             || __put_user((void __user *)(unsigned long)req32.buf,
 259                           &request->buf)
 260             || __put_user(req32.nbox, &request->nbox)
 261             || __put_user((void __user *)(unsigned long)req32.boxes,
 262                           &request->boxes))
 263                 return -EFAULT;
 264
 265         return drm_ioctl(file, DRM_IOCTL_RADEON_CMDBUF, (unsigned long)request);
 266 }
 267
 268 typedef struct drm_radeon_getparam32 {
 269         int param;
 270         u32 value;
 271 } drm_radeon_getparam32_t;
 272
 273 static int compat_radeon_cp_getparam(struct file *file, unsigned int cmd,
 274                                      unsigned long arg)
 275 {
 276         drm_radeon_getparam32_t req32;
 277         drm_radeon_getparam_t __user *request;
 278
 279         if (copy_from_user(&req32, (void __user *)arg, sizeof(req32)))
 280                 return -EFAULT;
 281
 282         request = compat_alloc_user_space(sizeof(*request));
 283         if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
 284             || __put_user(req32.param, &request->param)
 285             || __put_user((void __user *)(unsigned long)req32.value,
 286                           &request->value))
 287                 return -EFAULT;
 288
 289         return drm_ioctl(file, DRM_IOCTL_RADEON_GETPARAM, (unsigned long)request);
 290 }
 291
 292 typedef struct drm_radeon_mem_alloc32 {
 293         int region;
 294         int alignment;
 295         int size;
 296         u32 region_offset;      /* offset from start of fb or GART */
 297 } drm_radeon_mem_alloc32_t;
 298
 299 static int compat_radeon_mem_alloc(struct file *file, unsigned int cmd,
 300                                    unsigned long arg)
 301 {
 302         drm_radeon_mem_alloc32_t req32;
 303         drm_radeon_mem_alloc_t __user *request;
 304
 305         if (copy_from_user(&req32, (void __user *)arg, sizeof(req32)))
 306                 return -EFAULT;
 307
 308         request = compat_alloc_user_space(sizeof(*request));
 309         if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
 310             || __put_user(req32.region, &request->region)
 311             || __put_user(req32.alignment, &request->alignment)
 312             || __put_user(req32.size, &request->size)
 313             || __put_user((int __user *)(unsigned long)req32.region_offset,
 314                           &request->region_offset))
 315                 return -EFAULT;
 316
 317         return drm_ioctl(file, DRM_IOCTL_RADEON_ALLOC, (unsigned long)request);
 318 }
 319
 320 typedef struct drm_radeon_irq_emit32 {
 321         u32 irq_seq;
 322 } drm_radeon_irq_emit32_t;
 323
 324 static int compat_radeon_irq_emit(struct file *file, unsigned int cmd,
 325                                   unsigned long arg)
 326 {
 327         drm_radeon_irq_emit32_t req32;
 328         drm_radeon_irq_emit_t __user *request;
 329
 330         if (copy_from_user(&req32, (void __user *)arg, sizeof(req32)))
 331                 return -EFAULT;
 332
 333         request = compat_alloc_user_space(sizeof(*request));
 334         if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
 335             || __put_user((int __user *)(unsigned long)req32.irq_seq,
 336                           &request->irq_seq))
 337                 return -EFAULT;
 338
 339         return drm_ioctl(file, DRM_IOCTL_RADEON_IRQ_EMIT, (unsigned long)request);
 340 }
 341
 342 /* The two 64-bit arches where alignof(u64)==4 in 32-bit code */
 343 #if defined (CONFIG_X86_64) || defined(CONFIG_IA64)
 344 typedef struct drm_radeon_setparam32 {
 345         int param;
 346         u64 value;
 347 } __attribute__((packed)) drm_radeon_setparam32_t;
 348
 349 static int compat_radeon_cp_setparam(struct file *file, unsigned int cmd,
 350                                      unsigned long arg)
 351 {
 352         drm_radeon_setparam32_t req32;
 353         drm_radeon_setparam_t __user *request;
 354
 355         if (copy_from_user(&req32, (void __user *) arg, sizeof(req32)))
 356                 return -EFAULT;
 357
 358         request = compat_alloc_user_space(sizeof(*request));
 359         if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
 360             || __put_user(req32.param, &request->param)
 361             || __put_user((void __user *)(unsigned long)req32.value,
 362                           &request->value))
 363                 return -EFAULT;
 364
 365         return drm_ioctl(file, DRM_IOCTL_RADEON_SETPARAM, (unsigned long) request);
 366 }
 367 #else
 368 #define compat_radeon_cp_setparam NULL
 369 #endif /* X86_64 || IA64 */
 370
 371 static drm_ioctl_compat_t *radeon_compat_ioctls[] = {
 372         [DRM_RADEON_CP_INIT] = compat_radeon_cp_init,
 373         [DRM_RADEON_CLEAR] = compat_radeon_cp_clear,
 374         [DRM_RADEON_STIPPLE] = compat_radeon_cp_stipple,
 375         [DRM_RADEON_TEXTURE] = compat_radeon_cp_texture,
 376         [DRM_RADEON_VERTEX2] = compat_radeon_cp_vertex2,
 377         [DRM_RADEON_CMDBUF] = compat_radeon_cp_cmdbuf,
 378         [DRM_RADEON_GETPARAM] = compat_radeon_cp_getparam,
 379         [DRM_RADEON_SETPARAM] = compat_radeon_cp_setparam,
 380         [DRM_RADEON_ALLOC] = compat_radeon_mem_alloc,
 381         [DRM_RADEON_IRQ_EMIT] = compat_radeon_irq_emit,
 382 };
 383
 384 /**
 385  * Called whenever a 32-bit process running under a 64-bit kernel
 386  * performs an ioctl on /dev/dri/card<n>.
 387  *
 388  * \param filp file pointer.
 389  * \param cmd command.
 390  * \param arg user argument.
 391  * \return zero on success or negative number on failure.
 392  */
 393 long radeon_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 394 {
 395         unsigned int nr = DRM_IOCTL_NR(cmd);
 396         drm_ioctl_compat_t *fn = NULL;
 397         int ret;
 398
 399         if (nr < DRM_COMMAND_BASE)
 400                 return drm_compat_ioctl(filp, cmd, arg);
 401
 402         if (nr < DRM_COMMAND_BASE + ARRAY_SIZE(radeon_compat_ioctls))
 403                 fn = radeon_compat_ioctls[nr - DRM_COMMAND_BASE];
 404
 405         if (fn != NULL)
 406                 ret = (*fn) (filp, cmd, arg);
 407         else
 408                 ret = drm_ioctl(filp, cmd, arg);
 409
 410         return ret;
 411 }
 412
 413 long radeon_kms_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 414 {
 415         unsigned int nr = DRM_IOCTL_NR(cmd);
 416         int ret;
 417
 418         if (nr < DRM_COMMAND_BASE)
 419                 return drm_compat_ioctl(filp, cmd, arg);
 420
 421         ret = radeon_drm_ioctl(filp, cmd, arg);
 422
 423         return ret;
 424 }