drivers/gpu/drm/radeon/radeon_cs.c

   1 /*
   2  * Copyright 2008 Jerome Glisse.
   3  * All Rights Reserved.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   9  * and/or sell copies of the Software, and to permit persons to whom the
  10  * Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice (including the next
  13  * paragraph) shall be included in all copies or substantial portions of the
  14  * Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19  * PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  20  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  21  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  22  * DEALINGS IN THE SOFTWARE.
  23  *
  24  * Authors:
  25  *    Jerome Glisse <glisse@freedesktop.org>
  26  */
  27 #include "drmP.h"
  28 #include "radeon_drm.h"
  29 #include "radeon_reg.h"
  30 #include "radeon.h"
  31
  32 void r100_cs_dump_packet(struct radeon_cs_parser *p,
  33                          struct radeon_cs_packet *pkt);
  34
  35 int radeon_cs_parser_relocs(struct radeon_cs_parser *p)
  36 {
  37         struct drm_device *ddev = p->rdev->ddev;
  38         struct radeon_cs_chunk *chunk;
  39         unsigned i, j;
  40         bool duplicate;
  41
  42         if (p->chunk_relocs_idx == -1) {
  43                 return 0;
  44         }
  45         chunk = &p->chunks[p->chunk_relocs_idx];
  46         /* FIXME: we assume that each relocs use 4 dwords */
  47         p->nrelocs = chunk->length_dw / 4;
  48         p->relocs_ptr = kcalloc(p->nrelocs, sizeof(void *), GFP_KERNEL);
  49         if (p->relocs_ptr == NULL) {
  50                 return -ENOMEM;
  51         }
  52         p->relocs = kcalloc(p->nrelocs, sizeof(struct radeon_cs_reloc), GFP_KERNEL);
  53         if (p->relocs == NULL) {
  54                 return -ENOMEM;
  55         }
  56         for (i = 0; i < p->nrelocs; i++) {
  57                 struct drm_radeon_cs_reloc *r;
  58
  59                 duplicate = false;
  60                 r = (struct drm_radeon_cs_reloc *)&chunk->kdata[i*4];
  61                 for (j = 0; j < i; j++) {
  62                         if (r->handle == p->relocs[j].handle) {
  63                                 p->relocs_ptr[i] = &p->relocs[j];
  64                                 duplicate = true;
  65                                 break;
  66                         }
  67                 }
  68                 if (!duplicate) {
  69                         p->relocs[i].gobj = drm_gem_object_lookup(ddev,
  70                                                                   p->filp,
  71                                                                   r->handle);
  72                         if (p->relocs[i].gobj == NULL) {
  73                                 DRM_ERROR("gem object lookup failed 0x%x\n",
  74                                           r->handle);
  75                                 return -ENOENT;
  76                         }
  77                         p->relocs_ptr[i] = &p->relocs[i];
  78                         p->relocs[i].robj = gem_to_radeon_bo(p->relocs[i].gobj);
  79                         p->relocs[i].lobj.bo = p->relocs[i].robj;
  80                         p->relocs[i].lobj.wdomain = r->write_domain;
  81                         p->relocs[i].lobj.rdomain = r->read_domains;
  82                         p->relocs[i].lobj.tv.bo = &p->relocs[i].robj->tbo;
  83                         p->relocs[i].handle = r->handle;
  84                         p->relocs[i].flags = r->flags;
  85                         radeon_bo_list_add_object(&p->relocs[i].lobj,
  86                                                   &p->validated);
  87
  88                 } else
  89                         p->relocs[i].handle = 0;
  90         }
  91         return radeon_bo_list_validate(&p->validated);
  92 }
  93
  94 static int radeon_cs_get_ring(struct radeon_cs_parser *p, u32 ring, s32 priority)
  95 {
  96         p->priority = priority;
  97
  98         switch (ring) {
  99         default:
 100                 DRM_ERROR("unknown ring id: %d\n", ring);
 101                 return -EINVAL;
 102         case RADEON_CS_RING_GFX:
 103                 p->ring = RADEON_RING_TYPE_GFX_INDEX;
 104                 break;
 105         case RADEON_CS_RING_COMPUTE:
 106                 /* for now */
 107                 p->ring = RADEON_RING_TYPE_GFX_INDEX;
 108                 break;
 109         }
 110         return 0;
 111 }
 112
 113 static int radeon_cs_sync_rings(struct radeon_cs_parser *p)
 114 {
 115         bool sync_to_ring[RADEON_NUM_RINGS] = { };
 116         int i, r;
 117
 118         for (i = 0; i < p->nrelocs; i++) {
 119                 if (!p->relocs[i].robj || !p->relocs[i].robj->tbo.sync_obj)
 120                         continue;
 121
 122                 if (!(p->relocs[i].flags & RADEON_RELOC_DONT_SYNC)) {
 123                         struct radeon_fence *fence = p->relocs[i].robj->tbo.sync_obj;
 124                         if (!radeon_fence_signaled(fence)) {
 125                                 sync_to_ring[fence->ring] = true;
 126                         }
 127                 }
 128         }
 129
 130         for (i = 0; i < RADEON_NUM_RINGS; ++i) {
 131                 /* no need to sync to our own or unused rings */
 132                 if (i == p->ring || !sync_to_ring[i] || !p->rdev->ring[i].ready)
 133                         continue;
 134
 135                 if (!p->ib->fence->semaphore) {
 136                         r = radeon_semaphore_create(p->rdev, &p->ib->fence->semaphore);
 137                         if (r)
 138                                 return r;
 139                 }
 140
 141                 r = radeon_ring_lock(p->rdev, &p->rdev->ring[i], 3);
 142                 if (r)
 143                         return r;
 144                 radeon_semaphore_emit_signal(p->rdev, i, p->ib->fence->semaphore);
 145                 radeon_ring_unlock_commit(p->rdev, &p->rdev->ring[i]);
 146
 147                 r = radeon_ring_lock(p->rdev, &p->rdev->ring[p->ring], 3);
 148                 if (r)
 149                         return r;
 150                 radeon_semaphore_emit_wait(p->rdev, p->ring, p->ib->fence->semaphore);
 151                 radeon_ring_unlock_commit(p->rdev, &p->rdev->ring[p->ring]);
 152         }
 153         return 0;
 154 }
 155
 156 int radeon_cs_parser_init(struct radeon_cs_parser *p, void *data)
 157 {
 158         struct drm_radeon_cs *cs = data;
 159         uint64_t *chunk_array_ptr;
 160         unsigned size, i;
 161         u32 ring = RADEON_CS_RING_GFX;
 162         s32 priority = 0;
 163
 164         if (!cs->num_chunks) {
 165                 return 0;
 166         }
 167         /* get chunks */
 168         INIT_LIST_HEAD(&p->validated);
 169         p->idx = 0;
 170         p->chunk_ib_idx = -1;
 171         p->chunk_relocs_idx = -1;
 172         p->chunk_flags_idx = -1;
 173         p->chunk_const_ib_idx = -1;
 174         p->chunks_array = kcalloc(cs->num_chunks, sizeof(uint64_t), GFP_KERNEL);
 175         if (p->chunks_array == NULL) {
 176                 return -ENOMEM;
 177         }
 178         chunk_array_ptr = (uint64_t *)(unsigned long)(cs->chunks);
 179         if (DRM_COPY_FROM_USER(p->chunks_array, chunk_array_ptr,
 180                                sizeof(uint64_t)*cs->num_chunks)) {
 181                 return -EFAULT;
 182         }
 183         p->cs_flags = 0;
 184         p->nchunks = cs->num_chunks;
 185         p->chunks = kcalloc(p->nchunks, sizeof(struct radeon_cs_chunk), GFP_KERNEL);
 186         if (p->chunks == NULL) {
 187                 return -ENOMEM;
 188         }
 189         for (i = 0; i < p->nchunks; i++) {
 190                 struct drm_radeon_cs_chunk __user **chunk_ptr = NULL;
 191                 struct drm_radeon_cs_chunk user_chunk;
 192                 uint32_t __user *cdata;
 193
 194                 chunk_ptr = (void __user*)(unsigned long)p->chunks_array[i];
 195                 if (DRM_COPY_FROM_USER(&user_chunk, chunk_ptr,
 196                                        sizeof(struct drm_radeon_cs_chunk))) {
 197                         return -EFAULT;
 198                 }
 199                 p->chunks[i].length_dw = user_chunk.length_dw;
 200                 p->chunks[i].kdata = NULL;
 201                 p->chunks[i].chunk_id = user_chunk.chunk_id;
 202
 203                 if (p->chunks[i].chunk_id == RADEON_CHUNK_ID_RELOCS) {
 204                         p->chunk_relocs_idx = i;
 205                 }
 206                 if (p->chunks[i].chunk_id == RADEON_CHUNK_ID_IB) {
 207                         p->chunk_ib_idx = i;
 208                         /* zero length IB isn't useful */
 209                         if (p->chunks[i].length_dw == 0)
 210                                 return -EINVAL;
 211                 }
 212                 if (p->chunks[i].chunk_id == RADEON_CHUNK_ID_CONST_IB) {
 213                         p->chunk_const_ib_idx = i;
 214                         /* zero length CONST IB isn't useful */
 215                         if (p->chunks[i].length_dw == 0)
 216                                 return -EINVAL;
 217                 }
 218                 if (p->chunks[i].chunk_id == RADEON_CHUNK_ID_FLAGS) {
 219                         p->chunk_flags_idx = i;
 220                         /* zero length flags aren't useful */
 221                         if (p->chunks[i].length_dw == 0)
 222                                 return -EINVAL;
 223                 }
 224
 225                 p->chunks[i].length_dw = user_chunk.length_dw;
 226                 p->chunks[i].user_ptr = (void __user *)(unsigned long)user_chunk.chunk_data;
 227
 228                 cdata = (uint32_t *)(unsigned long)user_chunk.chunk_data;
 229                 if ((p->chunks[i].chunk_id == RADEON_CHUNK_ID_RELOCS) ||
 230                     (p->chunks[i].chunk_id == RADEON_CHUNK_ID_FLAGS)) {
 231                         size = p->chunks[i].length_dw * sizeof(uint32_t);
 232                         p->chunks[i].kdata = kmalloc(size, GFP_KERNEL);
 233                         if (p->chunks[i].kdata == NULL) {
 234                                 return -ENOMEM;
 235                         }
 236                         if (DRM_COPY_FROM_USER(p->chunks[i].kdata,
 237                                                p->chunks[i].user_ptr, size)) {
 238                                 return -EFAULT;
 239                         }
 240                         if (p->chunks[i].chunk_id == RADEON_CHUNK_ID_FLAGS) {
 241                                 p->cs_flags = p->chunks[i].kdata[0];
 242                                 if (p->chunks[i].length_dw > 1)
 243                                         ring = p->chunks[i].kdata[1];
 244                                 if (p->chunks[i].length_dw > 2)
 245                                         priority = (s32)p->chunks[i].kdata[2];
 246                         }
 247                 }
 248         }
 249
 250         if ((p->cs_flags & RADEON_CS_USE_VM) &&
 251             !p->rdev->vm_manager.enabled) {
 252                 DRM_ERROR("VM not active on asic!\n");
 253                 return -EINVAL;
 254         }
 255
 256         /* we only support VM on SI+ */
 257         if ((p->rdev->family >= CHIP_TAHITI) &&
 258             ((p->cs_flags & RADEON_CS_USE_VM) == 0)) {
 259                 DRM_ERROR("VM required on SI+!\n");
 260                 return -EINVAL;
 261         }
 262
 263         if (radeon_cs_get_ring(p, ring, priority))
 264                 return -EINVAL;
 265
 266
 267         /* deal with non-vm */
 268         if ((p->chunk_ib_idx != -1) &&
 269             ((p->cs_flags & RADEON_CS_USE_VM) == 0) &&
 270             (p->chunks[p->chunk_ib_idx].chunk_id == RADEON_CHUNK_ID_IB)) {
 271                 if (p->chunks[p->chunk_ib_idx].length_dw > (16 * 1024)) {
 272                         DRM_ERROR("cs IB too big: %d\n",
 273                                   p->chunks[p->chunk_ib_idx].length_dw);
 274                         return -EINVAL;
 275                 }
 276                 p->chunks[p->chunk_ib_idx].kpage[0] = kmalloc(PAGE_SIZE, GFP_KERNEL);
 277                 p->chunks[p->chunk_ib_idx].kpage[1] = kmalloc(PAGE_SIZE, GFP_KERNEL);
 278                 if (p->chunks[p->chunk_ib_idx].kpage[0] == NULL ||
 279                     p->chunks[p->chunk_ib_idx].kpage[1] == NULL)
 280                         return -ENOMEM;
 281                 p->chunks[p->chunk_ib_idx].kpage_idx[0] = -1;
 282                 p->chunks[p->chunk_ib_idx].kpage_idx[1] = -1;
 283                 p->chunks[p->chunk_ib_idx].last_copied_page = -1;
 284                 p->chunks[p->chunk_ib_idx].last_page_index =
 285                         ((p->chunks[p->chunk_ib_idx].length_dw * 4) - 1) / PAGE_SIZE;
 286         }
 287
 288         return 0;
 289 }
 290
 291 /**
 292  * cs_parser_fini() - clean parser states
 293  * @parser:     parser structure holding parsing context.
 294  * @error:      error number
 295  *
 296  * If error is set than unvalidate buffer, otherwise just free memory
 297  * used by parsing context.
 298  **/
 299 static void radeon_cs_parser_fini(struct radeon_cs_parser *parser, int error)
 300 {
 301         unsigned i;
 302
 303
 304         if (!error && parser->ib)
 305                 ttm_eu_fence_buffer_objects(&parser->validated,
 306                                             parser->ib->fence);
 307         else
 308                 ttm_eu_backoff_reservation(&parser->validated);
 309
 310         if (parser->relocs != NULL) {
 311                 for (i = 0; i < parser->nrelocs; i++) {
 312                         if (parser->relocs[i].gobj)
 313                                 drm_gem_object_unreference_unlocked(parser->relocs[i].gobj);
 314                 }
 315         }
 316         kfree(parser->track);
 317         kfree(parser->relocs);
 318         kfree(parser->relocs_ptr);
 319         for (i = 0; i < parser->nchunks; i++) {
 320                 kfree(parser->chunks[i].kdata);
 321                 kfree(parser->chunks[i].kpage[0]);
 322                 kfree(parser->chunks[i].kpage[1]);
 323         }
 324         kfree(parser->chunks);
 325         kfree(parser->chunks_array);
 326         radeon_ib_free(parser->rdev, &parser->ib);
 327 }
 328
 329 static int radeon_cs_ib_chunk(struct radeon_device *rdev,
 330                               struct radeon_cs_parser *parser)
 331 {
 332         struct radeon_cs_chunk *ib_chunk;
 333         int r;
 334
 335         if (parser->chunk_ib_idx == -1)
 336                 return 0;
 337
 338         if (parser->cs_flags & RADEON_CS_USE_VM)
 339                 return 0;
 340
 341         ib_chunk = &parser->chunks[parser->chunk_ib_idx];
 342         /* Copy the packet into the IB, the parser will read from the
 343          * input memory (cached) and write to the IB (which can be
 344          * uncached).
 345          */
 346         r =  radeon_ib_get(rdev, parser->ring, &parser->ib,
 347                            ib_chunk->length_dw * 4);
 348         if (r) {
 349                 DRM_ERROR("Failed to get ib !\n");
 350                 return r;
 351         }
 352         parser->ib->length_dw = ib_chunk->length_dw;
 353         r = radeon_cs_parse(rdev, parser->ring, parser);
 354         if (r || parser->parser_error) {
 355                 DRM_ERROR("Invalid command stream !\n");
 356                 return r;
 357         }
 358         r = radeon_cs_finish_pages(parser);
 359         if (r) {
 360                 DRM_ERROR("Invalid command stream !\n");
 361                 return r;
 362         }
 363         r = radeon_cs_sync_rings(parser);
 364         if (r) {
 365                 DRM_ERROR("Failed to synchronize rings !\n");
 366         }
 367         parser->ib->vm_id = 0;
 368         r = radeon_ib_schedule(rdev, parser->ib);
 369         if (r) {
 370                 DRM_ERROR("Failed to schedule IB !\n");
 371         }
 372         return 0;
 373 }
 374
 375 static int radeon_bo_vm_update_pte(struct radeon_cs_parser *parser,
 376                                    struct radeon_vm *vm)
 377 {
 378         struct radeon_bo_list *lobj;
 379         struct radeon_bo *bo;
 380         int r;
 381
 382         list_for_each_entry(lobj, &parser->validated, tv.head) {
 383                 bo = lobj->bo;
 384                 r = radeon_vm_bo_update_pte(parser->rdev, vm, bo, &bo->tbo.mem);
 385                 if (r) {
 386                         return r;
 387                 }
 388         }
 389         return 0;
 390 }
 391
 392 static int radeon_cs_ib_vm_chunk(struct radeon_device *rdev,
 393                                  struct radeon_cs_parser *parser)
 394 {
 395         struct radeon_cs_chunk *ib_chunk;
 396         struct radeon_fpriv *fpriv = parser->filp->driver_priv;
 397         struct radeon_vm *vm = &fpriv->vm;
 398         int r;
 399
 400         if (parser->chunk_ib_idx == -1)
 401                 return 0;
 402
 403         if ((parser->cs_flags & RADEON_CS_USE_VM) == 0)
 404                 return 0;
 405
 406         if ((rdev->family >= CHIP_TAHITI) &&
 407             (parser->chunk_const_ib_idx != -1)) {
 408                 ib_chunk = &parser->chunks[parser->chunk_const_ib_idx];
 409                 if (ib_chunk->length_dw > RADEON_IB_VM_MAX_SIZE) {
 410                         DRM_ERROR("cs IB CONST too big: %d\n", ib_chunk->length_dw);
 411                         return -EINVAL;
 412                 }
 413                 r =  radeon_ib_get(rdev, parser->ring, &parser->const_ib,
 414                                    ib_chunk->length_dw * 4);
 415                 if (r) {
 416                         DRM_ERROR("Failed to get const ib !\n");
 417                         return r;
 418                 }
 419                 parser->const_ib->is_const_ib = true;
 420                 parser->const_ib->length_dw = ib_chunk->length_dw;
 421                 /* Copy the packet into the IB */
 422                 if (DRM_COPY_FROM_USER(parser->const_ib->ptr, ib_chunk->user_ptr,
 423                                        ib_chunk->length_dw * 4)) {
 424                         return -EFAULT;
 425                 }
 426                 r = radeon_ring_ib_parse(rdev, parser->ring, parser->const_ib);
 427                 if (r) {
 428                         return r;
 429                 }
 430         }
 431
 432         ib_chunk = &parser->chunks[parser->chunk_ib_idx];
 433         if (ib_chunk->length_dw > RADEON_IB_VM_MAX_SIZE) {
 434                 DRM_ERROR("cs IB too big: %d\n", ib_chunk->length_dw);
 435                 return -EINVAL;
 436         }
 437         r =  radeon_ib_get(rdev, parser->ring, &parser->ib,
 438                            ib_chunk->length_dw * 4);
 439         if (r) {
 440                 DRM_ERROR("Failed to get ib !\n");
 441                 return r;
 442         }
 443         parser->ib->length_dw = ib_chunk->length_dw;
 444         /* Copy the packet into the IB */
 445         if (DRM_COPY_FROM_USER(parser->ib->ptr, ib_chunk->user_ptr,
 446                                ib_chunk->length_dw * 4)) {
 447                 return -EFAULT;
 448         }
 449         r = radeon_ring_ib_parse(rdev, parser->ring, parser->ib);
 450         if (r) {
 451                 return r;
 452         }
 453
 454         mutex_lock(&vm->mutex);
 455         r = radeon_vm_bind(rdev, vm);
 456         if (r) {
 457                 goto out;
 458         }
 459         r = radeon_bo_vm_update_pte(parser, vm);
 460         if (r) {
 461                 goto out;
 462         }
 463         r = radeon_cs_sync_rings(parser);
 464         if (r) {
 465                 DRM_ERROR("Failed to synchronize rings !\n");
 466         }
 467
 468         if ((rdev->family >= CHIP_TAHITI) &&
 469             (parser->chunk_const_ib_idx != -1)) {
 470                 parser->const_ib->vm_id = vm->id;
 471                 /* ib pool is bind at 0 in virtual address space to gpu_addr is the
 472                  * offset inside the pool bo
 473                  */
 474                 parser->const_ib->gpu_addr = parser->const_ib->sa_bo.offset;
 475                 r = radeon_ib_schedule(rdev, parser->const_ib);
 476                 if (r)
 477                         goto out;
 478         }
 479
 480         parser->ib->vm_id = vm->id;
 481         /* ib pool is bind at 0 in virtual address space to gpu_addr is the
 482          * offset inside the pool bo
 483          */
 484         parser->ib->gpu_addr = parser->ib->sa_bo.offset;
 485         parser->ib->is_const_ib = false;
 486         r = radeon_ib_schedule(rdev, parser->ib);
 487 out:
 488         if (!r) {
 489                 if (vm->fence) {
 490                         radeon_fence_unref(&vm->fence);
 491                 }
 492                 vm->fence = radeon_fence_ref(parser->ib->fence);
 493         }
 494         mutex_unlock(&fpriv->vm.mutex);
 495         return r;
 496 }
 497
 498 int radeon_cs_ioctl(struct drm_device *dev, void *data, struct drm_file *filp)
 499 {
 500         struct radeon_device *rdev = dev->dev_private;
 501         struct radeon_cs_parser parser;
 502         int r;
 503
 504         radeon_mutex_lock(&rdev->cs_mutex);
 505         if (!rdev->accel_working) {
 506                 radeon_mutex_unlock(&rdev->cs_mutex);
 507                 return -EBUSY;
 508         }
 509         /* initialize parser */
 510         memset(&parser, 0, sizeof(struct radeon_cs_parser));
 511         parser.filp = filp;
 512         parser.rdev = rdev;
 513         parser.dev = rdev->dev;
 514         parser.family = rdev->family;
 515         r = radeon_cs_parser_init(&parser, data);
 516         if (r) {
 517                 DRM_ERROR("Failed to initialize parser !\n");
 518                 radeon_cs_parser_fini(&parser, r);
 519                 radeon_mutex_unlock(&rdev->cs_mutex);
 520                 return r;
 521         }
 522         r = radeon_cs_parser_relocs(&parser);
 523         if (r) {
 524                 if (r != -ERESTARTSYS)
 525                         DRM_ERROR("Failed to parse relocation %d!\n", r);
 526                 radeon_cs_parser_fini(&parser, r);
 527                 radeon_mutex_unlock(&rdev->cs_mutex);
 528                 return r;
 529         }
 530         r = radeon_cs_ib_chunk(rdev, &parser);
 531         if (r) {
 532                 goto out;
 533         }
 534         r = radeon_cs_ib_vm_chunk(rdev, &parser);
 535         if (r) {
 536                 goto out;
 537         }
 538 out:
 539         radeon_cs_parser_fini(&parser, r);
 540         radeon_mutex_unlock(&rdev->cs_mutex);
 541         return r;
 542 }
 543
 544 int radeon_cs_finish_pages(struct radeon_cs_parser *p)
 545 {
 546         struct radeon_cs_chunk *ibc = &p->chunks[p->chunk_ib_idx];
 547         int i;
 548         int size = PAGE_SIZE;
 549
 550         for (i = ibc->last_copied_page + 1; i <= ibc->last_page_index; i++) {
 551                 if (i == ibc->last_page_index) {
 552                         size = (ibc->length_dw * 4) % PAGE_SIZE;
 553                         if (size == 0)
 554                                 size = PAGE_SIZE;
 555                 }
 556
 557                 if (DRM_COPY_FROM_USER(p->ib->ptr + (i * (PAGE_SIZE/4)),
 558                                        ibc->user_ptr + (i * PAGE_SIZE),
 559                                        size))
 560                         return -EFAULT;
 561         }
 562         return 0;
 563 }
 564
 565 int radeon_cs_update_pages(struct radeon_cs_parser *p, int pg_idx)
 566 {
 567         int new_page;
 568         struct radeon_cs_chunk *ibc = &p->chunks[p->chunk_ib_idx];
 569         int i;
 570         int size = PAGE_SIZE;
 571
 572         for (i = ibc->last_copied_page + 1; i < pg_idx; i++) {
 573                 if (DRM_COPY_FROM_USER(p->ib->ptr + (i * (PAGE_SIZE/4)),
 574                                        ibc->user_ptr + (i * PAGE_SIZE),
 575                                        PAGE_SIZE)) {
 576                         p->parser_error = -EFAULT;
 577                         return 0;
 578                 }
 579         }
 580
 581         new_page = ibc->kpage_idx[0] < ibc->kpage_idx[1] ? 0 : 1;
 582
 583         if (pg_idx == ibc->last_page_index) {
 584                 size = (ibc->length_dw * 4) % PAGE_SIZE;
 585                         if (size == 0)
 586                                 size = PAGE_SIZE;
 587         }
 588
 589         if (DRM_COPY_FROM_USER(ibc->kpage[new_page],
 590                                ibc->user_ptr + (pg_idx * PAGE_SIZE),
 591                                size)) {
 592                 p->parser_error = -EFAULT;
 593                 return 0;
 594         }
 595
 596         /* copy to IB here */
 597         memcpy((void *)(p->ib->ptr+(pg_idx*(PAGE_SIZE/4))), ibc->kpage[new_page], size);
 598
 599         ibc->last_copied_page = pg_idx;
 600         ibc->kpage_idx[new_page] = pg_idx;
 601
 602         return new_page;
 603 }