linux/drivers/gpu/drm/radeon/radeon_ioc32.c
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   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
  36typedef 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
  59static 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
  97typedef 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
 106static 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
 129typedef struct drm_radeon_stipple32 {
 130        u32 mask;
 131} drm_radeon_stipple32_t;
 132
 133static 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
 152typedef 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
 158typedef 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
 167static 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
 206typedef 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
 215static 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
 239typedef struct drm_radeon_cmd_buffer32 {
 240        int bufsz;
 241        u32 buf;
 242        int nbox;
 243        u32 boxes;
 244} drm_radeon_cmd_buffer32_t;
 245
 246static 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
 268typedef struct drm_radeon_getparam32 {
 269        int param;
 270        u32 value;
 271} drm_radeon_getparam32_t;
 272
 273static 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
 292typedef 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
 299static 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
 320typedef struct drm_radeon_irq_emit32 {
 321        u32 irq_seq;
 322} drm_radeon_irq_emit32_t;
 323
 324static 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)
 344typedef struct drm_radeon_setparam32 {
 345        int param;
 346        u64 value;
 347} __attribute__((packed)) drm_radeon_setparam32_t;
 348
 349static 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
 371static 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 */
 393long 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
 413long 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}
 425