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 <drm/drmP.h>
  28 #include <drm/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 static 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         p->dma_reloc_idx = 0;
  47         /* FIXME: we assume that each relocs use 4 dwords */
  48         p->nrelocs = chunk->length_dw / 4;
  49         p->relocs_ptr = kcalloc(p->nrelocs, sizeof(void *), GFP_KERNEL);
  50         if (p->relocs_ptr == NULL) {
  51                 return -ENOMEM;
  52         }
  53         p->relocs = kcalloc(p->nrelocs, sizeof(struct radeon_cs_reloc), GFP_KERNEL);
  54         if (p->relocs == NULL) {
  55                 return -ENOMEM;
  56         }
  57         for (i = 0; i < p->nrelocs; i++) {
  58                 struct drm_radeon_cs_reloc *r;
  59
  60                 duplicate = false;
  61                 r = (struct drm_radeon_cs_reloc *)&chunk->kdata[i*4];
  62                 for (j = 0; j < i; j++) {
  63                         if (r->handle == p->relocs[j].handle) {
  64                                 p->relocs_ptr[i] = &p->relocs[j];
  65                                 duplicate = true;
  66                                 break;
  67                         }
  68                 }
  69                 if (!duplicate) {
  70                         p->relocs[i].gobj = drm_gem_object_lookup(ddev,
  71                                                                   p->filp,
  72                                                                   r->handle);
  73                         if (p->relocs[i].gobj == NULL) {
  74                                 DRM_ERROR("gem object lookup failed 0x%x\n",
  75                                           r->handle);
  76                                 return -ENOENT;
  77                         }
  78                         p->relocs_ptr[i] = &p->relocs[i];
  79                         p->relocs[i].robj = gem_to_radeon_bo(p->relocs[i].gobj);
  80                         p->relocs[i].lobj.bo = p->relocs[i].robj;
  81                         p->relocs[i].lobj.wdomain = r->write_domain;
  82                         p->relocs[i].lobj.rdomain = r->read_domains;
  83                         p->relocs[i].lobj.tv.bo = &p->relocs[i].robj->tbo;
  84                         p->relocs[i].handle = r->handle;
  85                         p->relocs[i].flags = r->flags;
  86                         radeon_bo_list_add_object(&p->relocs[i].lobj,
  87                                                   &p->validated);
  88
  89                 } else
  90                         p->relocs[i].handle = 0;
  91         }
  92         return radeon_bo_list_validate(&p->validated);
  93 }
  94
  95 static int radeon_cs_get_ring(struct radeon_cs_parser *p, u32 ring, s32 priority)
  96 {
  97         p->priority = priority;
  98
  99         switch (ring) {
 100         default:
 101                 DRM_ERROR("unknown ring id: %d\n", ring);
 102                 return -EINVAL;
 103         case RADEON_CS_RING_GFX:
 104                 p->ring = RADEON_RING_TYPE_GFX_INDEX;
 105                 break;
 106         case RADEON_CS_RING_COMPUTE:
 107                 if (p->rdev->family >= CHIP_TAHITI) {
 108                         if (p->priority > 0)
 109                                 p->ring = CAYMAN_RING_TYPE_CP1_INDEX;
 110                         else
 111                                 p->ring = CAYMAN_RING_TYPE_CP2_INDEX;
 112                 } else
 113                         p->ring = RADEON_RING_TYPE_GFX_INDEX;
 114                 break;
 115         case RADEON_CS_RING_DMA:
 116                 if (p->rdev->family >= CHIP_CAYMAN) {
 117                         if (p->priority > 0)
 118                                 p->ring = R600_RING_TYPE_DMA_INDEX;
 119                         else
 120                                 p->ring = CAYMAN_RING_TYPE_DMA1_INDEX;
 121                 } else if (p->rdev->family >= CHIP_R600) {
 122                         p->ring = R600_RING_TYPE_DMA_INDEX;
 123                 } else {
 124                         return -EINVAL;
 125                 }
 126                 break;
 127         }
 128         return 0;
 129 }
 130
 131 static void radeon_cs_sync_to(struct radeon_cs_parser *p,
 132                               struct radeon_fence *fence)
 133 {
 134         struct radeon_fence *other;
 135
 136         if (!fence)
 137                 return;
 138
 139         other = p->ib.sync_to[fence->ring];
 140         p->ib.sync_to[fence->ring] = radeon_fence_later(fence, other);
 141 }
 142
 143 static void radeon_cs_sync_rings(struct radeon_cs_parser *p)
 144 {
 145         int i;
 146
 147         for (i = 0; i < p->nrelocs; i++) {
 148                 if (!p->relocs[i].robj)
 149                         continue;
 150
 151                 radeon_cs_sync_to(p, p->relocs[i].robj->tbo.sync_obj);
 152         }
 153 }
 154
 155 /* XXX: note that this is called from the legacy UMS CS ioctl as well */
 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->ib.sa_bo = NULL;
 171         p->ib.semaphore = NULL;
 172         p->const_ib.sa_bo = NULL;
 173         p->const_ib.semaphore = NULL;
 174         p->chunk_ib_idx = -1;
 175         p->chunk_relocs_idx = -1;
 176         p->chunk_flags_idx = -1;
 177         p->chunk_const_ib_idx = -1;
 178         p->chunks_array = kcalloc(cs->num_chunks, sizeof(uint64_t), GFP_KERNEL);
 179         if (p->chunks_array == NULL) {
 180                 return -ENOMEM;
 181         }
 182         chunk_array_ptr = (uint64_t *)(unsigned long)(cs->chunks);
 183         if (DRM_COPY_FROM_USER(p->chunks_array, chunk_array_ptr,
 184                                sizeof(uint64_t)*cs->num_chunks)) {
 185                 return -EFAULT;
 186         }
 187         p->cs_flags = 0;
 188         p->nchunks = cs->num_chunks;
 189         p->chunks = kcalloc(p->nchunks, sizeof(struct radeon_cs_chunk), GFP_KERNEL);
 190         if (p->chunks == NULL) {
 191                 return -ENOMEM;
 192         }
 193         for (i = 0; i < p->nchunks; i++) {
 194                 struct drm_radeon_cs_chunk __user **chunk_ptr = NULL;
 195                 struct drm_radeon_cs_chunk user_chunk;
 196                 uint32_t __user *cdata;
 197
 198                 chunk_ptr = (void __user*)(unsigned long)p->chunks_array[i];
 199                 if (DRM_COPY_FROM_USER(&user_chunk, chunk_ptr,
 200                                        sizeof(struct drm_radeon_cs_chunk))) {
 201                         return -EFAULT;
 202                 }
 203                 p->chunks[i].length_dw = user_chunk.length_dw;
 204                 p->chunks[i].kdata = NULL;
 205                 p->chunks[i].chunk_id = user_chunk.chunk_id;
 206
 207                 if (p->chunks[i].chunk_id == RADEON_CHUNK_ID_RELOCS) {
 208                         p->chunk_relocs_idx = i;
 209                 }
 210                 if (p->chunks[i].chunk_id == RADEON_CHUNK_ID_IB) {
 211                         p->chunk_ib_idx = i;
 212                         /* zero length IB isn't useful */
 213                         if (p->chunks[i].length_dw == 0)
 214                                 return -EINVAL;
 215                 }
 216                 if (p->chunks[i].chunk_id == RADEON_CHUNK_ID_CONST_IB) {
 217                         p->chunk_const_ib_idx = i;
 218                         /* zero length CONST IB isn't useful */
 219                         if (p->chunks[i].length_dw == 0)
 220                                 return -EINVAL;
 221                 }
 222                 if (p->chunks[i].chunk_id == RADEON_CHUNK_ID_FLAGS) {
 223                         p->chunk_flags_idx = i;
 224                         /* zero length flags aren't useful */
 225                         if (p->chunks[i].length_dw == 0)
 226                                 return -EINVAL;
 227                 }
 228
 229                 p->chunks[i].length_dw = user_chunk.length_dw;
 230                 p->chunks[i].user_ptr = (void __user *)(unsigned long)user_chunk.chunk_data;
 231
 232                 cdata = (uint32_t *)(unsigned long)user_chunk.chunk_data;
 233                 if ((p->chunks[i].chunk_id == RADEON_CHUNK_ID_RELOCS) ||
 234                     (p->chunks[i].chunk_id == RADEON_CHUNK_ID_FLAGS)) {
 235                         size = p->chunks[i].length_dw * sizeof(uint32_t);
 236                         p->chunks[i].kdata = kmalloc(size, GFP_KERNEL);
 237                         if (p->chunks[i].kdata == NULL) {
 238                                 return -ENOMEM;
 239                         }
 240                         if (DRM_COPY_FROM_USER(p->chunks[i].kdata,
 241                                                p->chunks[i].user_ptr, size)) {
 242                                 return -EFAULT;
 243                         }
 244                         if (p->chunks[i].chunk_id == RADEON_CHUNK_ID_FLAGS) {
 245                                 p->cs_flags = p->chunks[i].kdata[0];
 246                                 if (p->chunks[i].length_dw > 1)
 247                                         ring = p->chunks[i].kdata[1];
 248                                 if (p->chunks[i].length_dw > 2)
 249                                         priority = (s32)p->chunks[i].kdata[2];
 250                         }
 251                 }
 252         }
 253
 254         /* these are KMS only */
 255         if (p->rdev) {
 256                 if ((p->cs_flags & RADEON_CS_USE_VM) &&
 257                     !p->rdev->vm_manager.enabled) {
 258                         DRM_ERROR("VM not active on asic!\n");
 259                         return -EINVAL;
 260                 }
 261
 262                 /* we only support VM on SI+ */
 263                 if ((p->rdev->family >= CHIP_TAHITI) &&
 264                     ((p->cs_flags & RADEON_CS_USE_VM) == 0)) {
 265                         DRM_ERROR("VM required on SI+!\n");
 266                         return -EINVAL;
 267                 }
 268
 269                 if (radeon_cs_get_ring(p, ring, priority))
 270                         return -EINVAL;
 271         }
 272
 273         /* deal with non-vm */
 274         if ((p->chunk_ib_idx != -1) &&
 275             ((p->cs_flags & RADEON_CS_USE_VM) == 0) &&
 276             (p->chunks[p->chunk_ib_idx].chunk_id == RADEON_CHUNK_ID_IB)) {
 277                 if (p->chunks[p->chunk_ib_idx].length_dw > (16 * 1024)) {
 278                         DRM_ERROR("cs IB too big: %d\n",
 279                                   p->chunks[p->chunk_ib_idx].length_dw);
 280                         return -EINVAL;
 281                 }
 282                 if ((p->rdev->flags & RADEON_IS_AGP)) {
 283                         p->chunks[p->chunk_ib_idx].kpage[0] = kmalloc(PAGE_SIZE, GFP_KERNEL);
 284                         p->chunks[p->chunk_ib_idx].kpage[1] = kmalloc(PAGE_SIZE, GFP_KERNEL);
 285                         if (p->chunks[p->chunk_ib_idx].kpage[0] == NULL ||
 286                             p->chunks[p->chunk_ib_idx].kpage[1] == NULL) {
 287                                 kfree(p->chunks[i].kpage[0]);
 288                                 kfree(p->chunks[i].kpage[1]);
 289                                 return -ENOMEM;
 290                         }
 291                 }
 292                 p->chunks[p->chunk_ib_idx].kpage_idx[0] = -1;
 293                 p->chunks[p->chunk_ib_idx].kpage_idx[1] = -1;
 294                 p->chunks[p->chunk_ib_idx].last_copied_page = -1;
 295                 p->chunks[p->chunk_ib_idx].last_page_index =
 296                         ((p->chunks[p->chunk_ib_idx].length_dw * 4) - 1) / PAGE_SIZE;
 297         }
 298
 299         return 0;
 300 }
 301
 302 /**
 303  * cs_parser_fini() - clean parser states
 304  * @parser:     parser structure holding parsing context.
 305  * @error:      error number
 306  *
 307  * If error is set than unvalidate buffer, otherwise just free memory
 308  * used by parsing context.
 309  **/
 310 static void radeon_cs_parser_fini(struct radeon_cs_parser *parser, int error)
 311 {
 312         unsigned i;
 313
 314         if (!error) {
 315                 ttm_eu_fence_buffer_objects(&parser->validated,
 316                                             parser->ib.fence);
 317         } else {
 318                 ttm_eu_backoff_reservation(&parser->validated);
 319         }
 320
 321         if (parser->relocs != NULL) {
 322                 for (i = 0; i < parser->nrelocs; i++) {
 323                         if (parser->relocs[i].gobj)
 324                                 drm_gem_object_unreference_unlocked(parser->relocs[i].gobj);
 325                 }
 326         }
 327         kfree(parser->track);
 328         kfree(parser->relocs);
 329         kfree(parser->relocs_ptr);
 330         for (i = 0; i < parser->nchunks; i++) {
 331                 kfree(parser->chunks[i].kdata);
 332                 if ((parser->rdev->flags & RADEON_IS_AGP)) {
 333                         kfree(parser->chunks[i].kpage[0]);
 334                         kfree(parser->chunks[i].kpage[1]);
 335                 }
 336         }
 337         kfree(parser->chunks);
 338         kfree(parser->chunks_array);
 339         radeon_ib_free(parser->rdev, &parser->ib);
 340         radeon_ib_free(parser->rdev, &parser->const_ib);
 341 }
 342
 343 static int radeon_cs_ib_chunk(struct radeon_device *rdev,
 344                               struct radeon_cs_parser *parser)
 345 {
 346         struct radeon_cs_chunk *ib_chunk;
 347         int r;
 348
 349         if (parser->chunk_ib_idx == -1)
 350                 return 0;
 351
 352         if (parser->cs_flags & RADEON_CS_USE_VM)
 353                 return 0;
 354
 355         ib_chunk = &parser->chunks[parser->chunk_ib_idx];
 356         /* Copy the packet into the IB, the parser will read from the
 357          * input memory (cached) and write to the IB (which can be
 358          * uncached).
 359          */
 360         r =  radeon_ib_get(rdev, parser->ring, &parser->ib,
 361                            NULL, ib_chunk->length_dw * 4);
 362         if (r) {
 363                 DRM_ERROR("Failed to get ib !\n");
 364                 return r;
 365         }
 366         parser->ib.length_dw = ib_chunk->length_dw;
 367         r = radeon_cs_parse(rdev, parser->ring, parser);
 368         if (r || parser->parser_error) {
 369                 DRM_ERROR("Invalid command stream !\n");
 370                 return r;
 371         }
 372         r = radeon_cs_finish_pages(parser);
 373         if (r) {
 374                 DRM_ERROR("Invalid command stream !\n");
 375                 return r;
 376         }
 377         radeon_cs_sync_rings(parser);
 378         r = radeon_ib_schedule(rdev, &parser->ib, NULL);
 379         if (r) {
 380                 DRM_ERROR("Failed to schedule IB !\n");
 381         }
 382         return r;
 383 }
 384
 385 static int radeon_bo_vm_update_pte(struct radeon_cs_parser *parser,
 386                                    struct radeon_vm *vm)
 387 {
 388         struct radeon_device *rdev = parser->rdev;
 389         struct radeon_bo_list *lobj;
 390         struct radeon_bo *bo;
 391         int r;
 392
 393         r = radeon_vm_bo_update_pte(rdev, vm, rdev->ring_tmp_bo.bo, &rdev->ring_tmp_bo.bo->tbo.mem);
 394         if (r) {
 395                 return r;
 396         }
 397         list_for_each_entry(lobj, &parser->validated, tv.head) {
 398                 bo = lobj->bo;
 399                 r = radeon_vm_bo_update_pte(parser->rdev, vm, bo, &bo->tbo.mem);
 400                 if (r) {
 401                         return r;
 402                 }
 403         }
 404         return 0;
 405 }
 406
 407 static int radeon_cs_ib_vm_chunk(struct radeon_device *rdev,
 408                                  struct radeon_cs_parser *parser)
 409 {
 410         struct radeon_cs_chunk *ib_chunk;
 411         struct radeon_fpriv *fpriv = parser->filp->driver_priv;
 412         struct radeon_vm *vm = &fpriv->vm;
 413         int r;
 414
 415         if (parser->chunk_ib_idx == -1)
 416                 return 0;
 417         if ((parser->cs_flags & RADEON_CS_USE_VM) == 0)
 418                 return 0;
 419
 420         if ((rdev->family >= CHIP_TAHITI) &&
 421             (parser->chunk_const_ib_idx != -1)) {
 422                 ib_chunk = &parser->chunks[parser->chunk_const_ib_idx];
 423                 if (ib_chunk->length_dw > RADEON_IB_VM_MAX_SIZE) {
 424                         DRM_ERROR("cs IB CONST too big: %d\n", ib_chunk->length_dw);
 425                         return -EINVAL;
 426                 }
 427                 r =  radeon_ib_get(rdev, parser->ring, &parser->const_ib,
 428                                    vm, ib_chunk->length_dw * 4);
 429                 if (r) {
 430                         DRM_ERROR("Failed to get const ib !\n");
 431                         return r;
 432                 }
 433                 parser->const_ib.is_const_ib = true;
 434                 parser->const_ib.length_dw = ib_chunk->length_dw;
 435                 /* Copy the packet into the IB */
 436                 if (DRM_COPY_FROM_USER(parser->const_ib.ptr, ib_chunk->user_ptr,
 437                                        ib_chunk->length_dw * 4)) {
 438                         return -EFAULT;
 439                 }
 440                 r = radeon_ring_ib_parse(rdev, parser->ring, &parser->const_ib);
 441                 if (r) {
 442                         return r;
 443                 }
 444         }
 445
 446         ib_chunk = &parser->chunks[parser->chunk_ib_idx];
 447         if (ib_chunk->length_dw > RADEON_IB_VM_MAX_SIZE) {
 448                 DRM_ERROR("cs IB too big: %d\n", ib_chunk->length_dw);
 449                 return -EINVAL;
 450         }
 451         r =  radeon_ib_get(rdev, parser->ring, &parser->ib,
 452                            vm, ib_chunk->length_dw * 4);
 453         if (r) {
 454                 DRM_ERROR("Failed to get ib !\n");
 455                 return r;
 456         }
 457         parser->ib.length_dw = ib_chunk->length_dw;
 458         /* Copy the packet into the IB */
 459         if (DRM_COPY_FROM_USER(parser->ib.ptr, ib_chunk->user_ptr,
 460                                ib_chunk->length_dw * 4)) {
 461                 return -EFAULT;
 462         }
 463         r = radeon_ring_ib_parse(rdev, parser->ring, &parser->ib);
 464         if (r) {
 465                 return r;
 466         }
 467
 468         mutex_lock(&rdev->vm_manager.lock);
 469         mutex_lock(&vm->mutex);
 470         r = radeon_vm_alloc_pt(rdev, vm);
 471         if (r) {
 472                 goto out;
 473         }
 474         r = radeon_bo_vm_update_pte(parser, vm);
 475         if (r) {
 476                 goto out;
 477         }
 478         radeon_cs_sync_rings(parser);
 479         radeon_cs_sync_to(parser, vm->fence);
 480         radeon_cs_sync_to(parser, radeon_vm_grab_id(rdev, vm, parser->ring));
 481
 482         if ((rdev->family >= CHIP_TAHITI) &&
 483             (parser->chunk_const_ib_idx != -1)) {
 484                 r = radeon_ib_schedule(rdev, &parser->ib, &parser->const_ib);
 485         } else {
 486                 r = radeon_ib_schedule(rdev, &parser->ib, NULL);
 487         }
 488
 489         if (!r) {
 490                 radeon_vm_fence(rdev, vm, parser->ib.fence);
 491         }
 492
 493 out:
 494         radeon_vm_add_to_lru(rdev, vm);
 495         mutex_unlock(&vm->mutex);
 496         mutex_unlock(&rdev->vm_manager.lock);
 497         return r;
 498 }
 499
 500 static int radeon_cs_handle_lockup(struct radeon_device *rdev, int r)
 501 {
 502         if (r == -EDEADLK) {
 503                 r = radeon_gpu_reset(rdev);
 504                 if (!r)
 505                         r = -EAGAIN;
 506         }
 507         return r;
 508 }
 509
 510 int radeon_cs_ioctl(struct drm_device *dev, void *data, struct drm_file *filp)
 511 {
 512         struct radeon_device *rdev = dev->dev_private;
 513         struct radeon_cs_parser parser;
 514         int r;
 515
 516         down_read(&rdev->exclusive_lock);
 517         if (!rdev->accel_working) {
 518                 up_read(&rdev->exclusive_lock);
 519                 return -EBUSY;
 520         }
 521         /* initialize parser */
 522         memset(&parser, 0, sizeof(struct radeon_cs_parser));
 523         parser.filp = filp;
 524         parser.rdev = rdev;
 525         parser.dev = rdev->dev;
 526         parser.family = rdev->family;
 527         r = radeon_cs_parser_init(&parser, data);
 528         if (r) {
 529                 DRM_ERROR("Failed to initialize parser !\n");
 530                 radeon_cs_parser_fini(&parser, r);
 531                 up_read(&rdev->exclusive_lock);
 532                 r = radeon_cs_handle_lockup(rdev, r);
 533                 return r;
 534         }
 535         r = radeon_cs_parser_relocs(&parser);
 536         if (r) {
 537                 if (r != -ERESTARTSYS)
 538                         DRM_ERROR("Failed to parse relocation %d!\n", r);
 539                 radeon_cs_parser_fini(&parser, r);
 540                 up_read(&rdev->exclusive_lock);
 541                 r = radeon_cs_handle_lockup(rdev, r);
 542                 return r;
 543         }
 544         r = radeon_cs_ib_chunk(rdev, &parser);
 545         if (r) {
 546                 goto out;
 547         }
 548         r = radeon_cs_ib_vm_chunk(rdev, &parser);
 549         if (r) {
 550                 goto out;
 551         }
 552 out:
 553         radeon_cs_parser_fini(&parser, r);
 554         up_read(&rdev->exclusive_lock);
 555         r = radeon_cs_handle_lockup(rdev, r);
 556         return r;
 557 }
 558
 559 int radeon_cs_finish_pages(struct radeon_cs_parser *p)
 560 {
 561         struct radeon_cs_chunk *ibc = &p->chunks[p->chunk_ib_idx];
 562         int i;
 563         int size = PAGE_SIZE;
 564
 565         for (i = ibc->last_copied_page + 1; i <= ibc->last_page_index; i++) {
 566                 if (i == ibc->last_page_index) {
 567                         size = (ibc->length_dw * 4) % PAGE_SIZE;
 568                         if (size == 0)
 569                                 size = PAGE_SIZE;
 570                 }
 571
 572                 if (DRM_COPY_FROM_USER(p->ib.ptr + (i * (PAGE_SIZE/4)),
 573                                        ibc->user_ptr + (i * PAGE_SIZE),
 574                                        size))
 575                         return -EFAULT;
 576         }
 577         return 0;
 578 }
 579
 580 static int radeon_cs_update_pages(struct radeon_cs_parser *p, int pg_idx)
 581 {
 582         int new_page;
 583         struct radeon_cs_chunk *ibc = &p->chunks[p->chunk_ib_idx];
 584         int i;
 585         int size = PAGE_SIZE;
 586         bool copy1 = (p->rdev->flags & RADEON_IS_AGP) ? false : true;
 587
 588         for (i = ibc->last_copied_page + 1; i < pg_idx; i++) {
 589                 if (DRM_COPY_FROM_USER(p->ib.ptr + (i * (PAGE_SIZE/4)),
 590                                        ibc->user_ptr + (i * PAGE_SIZE),
 591                                        PAGE_SIZE)) {
 592                         p->parser_error = -EFAULT;
 593                         return 0;
 594                 }
 595         }
 596
 597         if (pg_idx == ibc->last_page_index) {
 598                 size = (ibc->length_dw * 4) % PAGE_SIZE;
 599                 if (size == 0)
 600                         size = PAGE_SIZE;
 601         }
 602
 603         new_page = ibc->kpage_idx[0] < ibc->kpage_idx[1] ? 0 : 1;
 604         if (copy1)
 605                 ibc->kpage[new_page] = p->ib.ptr + (pg_idx * (PAGE_SIZE / 4));
 606
 607         if (DRM_COPY_FROM_USER(ibc->kpage[new_page],
 608                                ibc->user_ptr + (pg_idx * PAGE_SIZE),
 609                                size)) {
 610                 p->parser_error = -EFAULT;
 611                 return 0;
 612         }
 613
 614         /* copy to IB for non single case */
 615         if (!copy1)
 616                 memcpy((void *)(p->ib.ptr+(pg_idx*(PAGE_SIZE/4))), ibc->kpage[new_page], size);
 617
 618         ibc->last_copied_page = pg_idx;
 619         ibc->kpage_idx[new_page] = pg_idx;
 620
 621         return new_page;
 622 }
 623
 624 u32 radeon_get_ib_value(struct radeon_cs_parser *p, int idx)
 625 {
 626         struct radeon_cs_chunk *ibc = &p->chunks[p->chunk_ib_idx];
 627         u32 pg_idx, pg_offset;
 628         u32 idx_value = 0;
 629         int new_page;
 630
 631         pg_idx = (idx * 4) / PAGE_SIZE;
 632         pg_offset = (idx * 4) % PAGE_SIZE;
 633
 634         if (ibc->kpage_idx[0] == pg_idx)
 635                 return ibc->kpage[0][pg_offset/4];
 636         if (ibc->kpage_idx[1] == pg_idx)
 637                 return ibc->kpage[1][pg_offset/4];
 638
 639         new_page = radeon_cs_update_pages(p, pg_idx);
 640         if (new_page < 0) {
 641                 p->parser_error = new_page;
 642                 return 0;
 643         }
 644
 645         idx_value = ibc->kpage[new_page][pg_offset/4];
 646         return idx_value;
 647 }