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 static int radeon_cs_parser_relocs(struct radeon_cs_parser *p)
  33 {
  34         struct drm_device *ddev = p->rdev->ddev;
  35         struct radeon_cs_chunk *chunk;
  36         unsigned i, j;
  37         bool duplicate;
  38
  39         if (p->chunk_relocs_idx == -1) {
  40                 return 0;
  41         }
  42         chunk = &p->chunks[p->chunk_relocs_idx];
  43         p->dma_reloc_idx = 0;
  44         /* FIXME: we assume that each relocs use 4 dwords */
  45         p->nrelocs = chunk->length_dw / 4;
  46         p->relocs_ptr = kcalloc(p->nrelocs, sizeof(void *), GFP_KERNEL);
  47         if (p->relocs_ptr == NULL) {
  48                 return -ENOMEM;
  49         }
  50         p->relocs = kcalloc(p->nrelocs, sizeof(struct radeon_cs_reloc), GFP_KERNEL);
  51         if (p->relocs == NULL) {
  52                 return -ENOMEM;
  53         }
  54         for (i = 0; i < p->nrelocs; i++) {
  55                 struct drm_radeon_cs_reloc *r;
  56
  57                 duplicate = false;
  58                 r = (struct drm_radeon_cs_reloc *)&chunk->kdata[i*4];
  59                 for (j = 0; j < i; j++) {
  60                         if (r->handle == p->relocs[j].handle) {
  61                                 p->relocs_ptr[i] = &p->relocs[j];
  62                                 duplicate = true;
  63                                 break;
  64                         }
  65                 }
  66                 if (duplicate) {
  67                         p->relocs[i].handle = 0;
  68                         continue;
  69                 }
  70
  71                 p->relocs[i].gobj = drm_gem_object_lookup(ddev, 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.written = !!r->write_domain;
  82
  83                 /* the first reloc of an UVD job is the
  84                    msg and that must be in VRAM */
  85                 if (p->ring == R600_RING_TYPE_UVD_INDEX && i == 0) {
  86                         /* TODO: is this still needed for NI+ ? */
  87                         p->relocs[i].lobj.domain =
  88                                 RADEON_GEM_DOMAIN_VRAM;
  89
  90                         p->relocs[i].lobj.alt_domain =
  91                                 RADEON_GEM_DOMAIN_VRAM;
  92
  93                 } else {
  94                         uint32_t domain = r->write_domain ?
  95                                 r->write_domain : r->read_domains;
  96
  97                         p->relocs[i].lobj.domain = domain;
  98                         if (domain == RADEON_GEM_DOMAIN_VRAM)
  99                                 domain |= RADEON_GEM_DOMAIN_GTT;
 100                         p->relocs[i].lobj.alt_domain = domain;
 101                 }
 102
 103                 p->relocs[i].lobj.tv.bo = &p->relocs[i].robj->tbo;
 104                 p->relocs[i].handle = r->handle;
 105
 106                 radeon_bo_list_add_object(&p->relocs[i].lobj,
 107                                           &p->validated);
 108         }
 109         return radeon_bo_list_validate(&p->validated, p->ring);
 110 }
 111
 112 static int radeon_cs_get_ring(struct radeon_cs_parser *p, u32 ring, s32 priority)
 113 {
 114         p->priority = priority;
 115
 116         switch (ring) {
 117         default:
 118                 DRM_ERROR("unknown ring id: %d\n", ring);
 119                 return -EINVAL;
 120         case RADEON_CS_RING_GFX:
 121                 p->ring = RADEON_RING_TYPE_GFX_INDEX;
 122                 break;
 123         case RADEON_CS_RING_COMPUTE:
 124                 if (p->rdev->family >= CHIP_TAHITI) {
 125                         if (p->priority > 0)
 126                                 p->ring = CAYMAN_RING_TYPE_CP1_INDEX;
 127                         else
 128                                 p->ring = CAYMAN_RING_TYPE_CP2_INDEX;
 129                 } else
 130                         p->ring = RADEON_RING_TYPE_GFX_INDEX;
 131                 break;
 132         case RADEON_CS_RING_DMA:
 133                 if (p->rdev->family >= CHIP_CAYMAN) {
 134                         if (p->priority > 0)
 135                                 p->ring = R600_RING_TYPE_DMA_INDEX;
 136                         else
 137                                 p->ring = CAYMAN_RING_TYPE_DMA1_INDEX;
 138                 } else if (p->rdev->family >= CHIP_R600) {
 139                         p->ring = R600_RING_TYPE_DMA_INDEX;
 140                 } else {
 141                         return -EINVAL;
 142                 }
 143                 break;
 144         case RADEON_CS_RING_UVD:
 145                 p->ring = R600_RING_TYPE_UVD_INDEX;
 146                 break;
 147         }
 148         return 0;
 149 }
 150
 151 static void radeon_cs_sync_rings(struct radeon_cs_parser *p)
 152 {
 153         int i;
 154
 155         for (i = 0; i < p->nrelocs; i++) {
 156                 if (!p->relocs[i].robj)
 157                         continue;
 158
 159                 radeon_ib_sync_to(&p->ib, p->relocs[i].robj->tbo.sync_obj);
 160         }
 161 }
 162
 163 /* XXX: note that this is called from the legacy UMS CS ioctl as well */
 164 int radeon_cs_parser_init(struct radeon_cs_parser *p, void *data)
 165 {
 166         struct drm_radeon_cs *cs = data;
 167         uint64_t *chunk_array_ptr;
 168         unsigned size, i;
 169         u32 ring = RADEON_CS_RING_GFX;
 170         s32 priority = 0;
 171
 172         if (!cs->num_chunks) {
 173                 return 0;
 174         }
 175         /* get chunks */
 176         INIT_LIST_HEAD(&p->validated);
 177         p->idx = 0;
 178         p->ib.sa_bo = NULL;
 179         p->ib.semaphore = NULL;
 180         p->const_ib.sa_bo = NULL;
 181         p->const_ib.semaphore = NULL;
 182         p->chunk_ib_idx = -1;
 183         p->chunk_relocs_idx = -1;
 184         p->chunk_flags_idx = -1;
 185         p->chunk_const_ib_idx = -1;
 186         p->chunks_array = kcalloc(cs->num_chunks, sizeof(uint64_t), GFP_KERNEL);
 187         if (p->chunks_array == NULL) {
 188                 return -ENOMEM;
 189         }
 190         chunk_array_ptr = (uint64_t *)(unsigned long)(cs->chunks);
 191         if (DRM_COPY_FROM_USER(p->chunks_array, chunk_array_ptr,
 192                                sizeof(uint64_t)*cs->num_chunks)) {
 193                 return -EFAULT;
 194         }
 195         p->cs_flags = 0;
 196         p->nchunks = cs->num_chunks;
 197         p->chunks = kcalloc(p->nchunks, sizeof(struct radeon_cs_chunk), GFP_KERNEL);
 198         if (p->chunks == NULL) {
 199                 return -ENOMEM;
 200         }
 201         for (i = 0; i < p->nchunks; i++) {
 202                 struct drm_radeon_cs_chunk __user **chunk_ptr = NULL;
 203                 struct drm_radeon_cs_chunk user_chunk;
 204                 uint32_t __user *cdata;
 205
 206                 chunk_ptr = (void __user*)(unsigned long)p->chunks_array[i];
 207                 if (DRM_COPY_FROM_USER(&user_chunk, chunk_ptr,
 208                                        sizeof(struct drm_radeon_cs_chunk))) {
 209                         return -EFAULT;
 210                 }
 211                 p->chunks[i].length_dw = user_chunk.length_dw;
 212                 p->chunks[i].kdata = NULL;
 213                 p->chunks[i].chunk_id = user_chunk.chunk_id;
 214                 p->chunks[i].user_ptr = (void __user *)(unsigned long)user_chunk.chunk_data;
 215                 if (p->chunks[i].chunk_id == RADEON_CHUNK_ID_RELOCS) {
 216                         p->chunk_relocs_idx = i;
 217                 }
 218                 if (p->chunks[i].chunk_id == RADEON_CHUNK_ID_IB) {
 219                         p->chunk_ib_idx = i;
 220                         /* zero length IB isn't useful */
 221                         if (p->chunks[i].length_dw == 0)
 222                                 return -EINVAL;
 223                 }
 224                 if (p->chunks[i].chunk_id == RADEON_CHUNK_ID_CONST_IB) {
 225                         p->chunk_const_ib_idx = i;
 226                         /* zero length CONST IB isn't useful */
 227                         if (p->chunks[i].length_dw == 0)
 228                                 return -EINVAL;
 229                 }
 230                 if (p->chunks[i].chunk_id == RADEON_CHUNK_ID_FLAGS) {
 231                         p->chunk_flags_idx = i;
 232                         /* zero length flags aren't useful */
 233                         if (p->chunks[i].length_dw == 0)
 234                                 return -EINVAL;
 235                 }
 236
 237                 cdata = (uint32_t *)(unsigned long)user_chunk.chunk_data;
 238                 if ((p->chunks[i].chunk_id == RADEON_CHUNK_ID_RELOCS) ||
 239                     (p->chunks[i].chunk_id == RADEON_CHUNK_ID_FLAGS)) {
 240                         size = p->chunks[i].length_dw * sizeof(uint32_t);
 241                         p->chunks[i].kdata = kmalloc(size, GFP_KERNEL);
 242                         if (p->chunks[i].kdata == NULL) {
 243                                 return -ENOMEM;
 244                         }
 245                         if (DRM_COPY_FROM_USER(p->chunks[i].kdata,
 246                                                p->chunks[i].user_ptr, size)) {
 247                                 return -EFAULT;
 248                         }
 249                         if (p->chunks[i].chunk_id == RADEON_CHUNK_ID_FLAGS) {
 250                                 p->cs_flags = p->chunks[i].kdata[0];
 251                                 if (p->chunks[i].length_dw > 1)
 252                                         ring = p->chunks[i].kdata[1];
 253                                 if (p->chunks[i].length_dw > 2)
 254                                         priority = (s32)p->chunks[i].kdata[2];
 255                         }
 256                 }
 257         }
 258
 259         /* these are KMS only */
 260         if (p->rdev) {
 261                 if ((p->cs_flags & RADEON_CS_USE_VM) &&
 262                     !p->rdev->vm_manager.enabled) {
 263                         DRM_ERROR("VM not active on asic!\n");
 264                         return -EINVAL;
 265                 }
 266
 267                 if (radeon_cs_get_ring(p, ring, priority))
 268                         return -EINVAL;
 269
 270                 /* we only support VM on some SI+ rings */
 271                 if ((p->rdev->asic->ring[p->ring].cs_parse == NULL) &&
 272                    ((p->cs_flags & RADEON_CS_USE_VM) == 0)) {
 273                         DRM_ERROR("Ring %d requires VM!\n", p->ring);
 274                         return -EINVAL;
 275                 }
 276         }
 277
 278         /* deal with non-vm */
 279         if ((p->chunk_ib_idx != -1) &&
 280             ((p->cs_flags & RADEON_CS_USE_VM) == 0) &&
 281             (p->chunks[p->chunk_ib_idx].chunk_id == RADEON_CHUNK_ID_IB)) {
 282                 if (p->chunks[p->chunk_ib_idx].length_dw > (16 * 1024)) {
 283                         DRM_ERROR("cs IB too big: %d\n",
 284                                   p->chunks[p->chunk_ib_idx].length_dw);
 285                         return -EINVAL;
 286                 }
 287                 if (p->rdev && (p->rdev->flags & RADEON_IS_AGP)) {
 288                         p->chunks[p->chunk_ib_idx].kpage[0] = kmalloc(PAGE_SIZE, GFP_KERNEL);
 289                         p->chunks[p->chunk_ib_idx].kpage[1] = kmalloc(PAGE_SIZE, GFP_KERNEL);
 290                         if (p->chunks[p->chunk_ib_idx].kpage[0] == NULL ||
 291                             p->chunks[p->chunk_ib_idx].kpage[1] == NULL) {
 292                                 kfree(p->chunks[p->chunk_ib_idx].kpage[0]);
 293                                 kfree(p->chunks[p->chunk_ib_idx].kpage[1]);
 294                                 p->chunks[p->chunk_ib_idx].kpage[0] = NULL;
 295                                 p->chunks[p->chunk_ib_idx].kpage[1] = NULL;
 296                                 return -ENOMEM;
 297                         }
 298                 }
 299                 p->chunks[p->chunk_ib_idx].kpage_idx[0] = -1;
 300                 p->chunks[p->chunk_ib_idx].kpage_idx[1] = -1;
 301                 p->chunks[p->chunk_ib_idx].last_copied_page = -1;
 302                 p->chunks[p->chunk_ib_idx].last_page_index =
 303                         ((p->chunks[p->chunk_ib_idx].length_dw * 4) - 1) / PAGE_SIZE;
 304         }
 305
 306         return 0;
 307 }
 308
 309 /**
 310  * cs_parser_fini() - clean parser states
 311  * @parser:     parser structure holding parsing context.
 312  * @error:      error number
 313  *
 314  * If error is set than unvalidate buffer, otherwise just free memory
 315  * used by parsing context.
 316  **/
 317 static void radeon_cs_parser_fini(struct radeon_cs_parser *parser, int error)
 318 {
 319         unsigned i;
 320
 321         if (!error) {
 322                 ttm_eu_fence_buffer_objects(&parser->validated,
 323                                             parser->ib.fence);
 324         } else {
 325                 ttm_eu_backoff_reservation(&parser->validated);
 326         }
 327
 328         if (parser->relocs != NULL) {
 329                 for (i = 0; i < parser->nrelocs; i++) {
 330                         if (parser->relocs[i].gobj)
 331                                 drm_gem_object_unreference_unlocked(parser->relocs[i].gobj);
 332                 }
 333         }
 334         kfree(parser->track);
 335         kfree(parser->relocs);
 336         kfree(parser->relocs_ptr);
 337         for (i = 0; i < parser->nchunks; i++) {
 338                 kfree(parser->chunks[i].kdata);
 339                 if ((parser->rdev->flags & RADEON_IS_AGP)) {
 340                         kfree(parser->chunks[i].kpage[0]);
 341                         kfree(parser->chunks[i].kpage[1]);
 342                 }
 343         }
 344         kfree(parser->chunks);
 345         kfree(parser->chunks_array);
 346         radeon_ib_free(parser->rdev, &parser->ib);
 347         radeon_ib_free(parser->rdev, &parser->const_ib);
 348 }
 349
 350 static int radeon_cs_ib_chunk(struct radeon_device *rdev,
 351                               struct radeon_cs_parser *parser)
 352 {
 353         struct radeon_cs_chunk *ib_chunk;
 354         int r;
 355
 356         if (parser->chunk_ib_idx == -1)
 357                 return 0;
 358
 359         if (parser->cs_flags & RADEON_CS_USE_VM)
 360                 return 0;
 361
 362         ib_chunk = &parser->chunks[parser->chunk_ib_idx];
 363         /* Copy the packet into the IB, the parser will read from the
 364          * input memory (cached) and write to the IB (which can be
 365          * uncached).
 366          */
 367         r =  radeon_ib_get(rdev, parser->ring, &parser->ib,
 368                            NULL, ib_chunk->length_dw * 4);
 369         if (r) {
 370                 DRM_ERROR("Failed to get ib !\n");
 371                 return r;
 372         }
 373         parser->ib.length_dw = ib_chunk->length_dw;
 374         r = radeon_cs_parse(rdev, parser->ring, parser);
 375         if (r || parser->parser_error) {
 376                 DRM_ERROR("Invalid command stream !\n");
 377                 return r;
 378         }
 379         r = radeon_cs_finish_pages(parser);
 380         if (r) {
 381                 DRM_ERROR("Invalid command stream !\n");
 382                 return r;
 383         }
 384         radeon_cs_sync_rings(parser);
 385         r = radeon_ib_schedule(rdev, &parser->ib, NULL);
 386         if (r) {
 387                 DRM_ERROR("Failed to schedule IB !\n");
 388         }
 389         return r;
 390 }
 391
 392 static int radeon_bo_vm_update_pte(struct radeon_cs_parser *parser,
 393                                    struct radeon_vm *vm)
 394 {
 395         struct radeon_device *rdev = parser->rdev;
 396         struct radeon_bo_list *lobj;
 397         struct radeon_bo *bo;
 398         int r;
 399
 400         r = radeon_vm_bo_update_pte(rdev, vm, rdev->ring_tmp_bo.bo, &rdev->ring_tmp_bo.bo->tbo.mem);
 401         if (r) {
 402                 return r;
 403         }
 404         list_for_each_entry(lobj, &parser->validated, tv.head) {
 405                 bo = lobj->bo;
 406                 r = radeon_vm_bo_update_pte(parser->rdev, vm, bo, &bo->tbo.mem);
 407                 if (r) {
 408                         return r;
 409                 }
 410         }
 411         return 0;
 412 }
 413
 414 static int radeon_cs_ib_vm_chunk(struct radeon_device *rdev,
 415                                  struct radeon_cs_parser *parser)
 416 {
 417         struct radeon_cs_chunk *ib_chunk;
 418         struct radeon_fpriv *fpriv = parser->filp->driver_priv;
 419         struct radeon_vm *vm = &fpriv->vm;
 420         int r;
 421
 422         if (parser->chunk_ib_idx == -1)
 423                 return 0;
 424         if ((parser->cs_flags & RADEON_CS_USE_VM) == 0)
 425                 return 0;
 426
 427         if ((rdev->family >= CHIP_TAHITI) &&
 428             (parser->chunk_const_ib_idx != -1)) {
 429                 ib_chunk = &parser->chunks[parser->chunk_const_ib_idx];
 430                 if (ib_chunk->length_dw > RADEON_IB_VM_MAX_SIZE) {
 431                         DRM_ERROR("cs IB CONST too big: %d\n", ib_chunk->length_dw);
 432                         return -EINVAL;
 433                 }
 434                 r =  radeon_ib_get(rdev, parser->ring, &parser->const_ib,
 435                                    vm, ib_chunk->length_dw * 4);
 436                 if (r) {
 437                         DRM_ERROR("Failed to get const ib !\n");
 438                         return r;
 439                 }
 440                 parser->const_ib.is_const_ib = true;
 441                 parser->const_ib.length_dw = ib_chunk->length_dw;
 442                 /* Copy the packet into the IB */
 443                 if (DRM_COPY_FROM_USER(parser->const_ib.ptr, ib_chunk->user_ptr,
 444                                        ib_chunk->length_dw * 4)) {
 445                         return -EFAULT;
 446                 }
 447                 r = radeon_ring_ib_parse(rdev, parser->ring, &parser->const_ib);
 448                 if (r) {
 449                         return r;
 450                 }
 451         }
 452
 453         ib_chunk = &parser->chunks[parser->chunk_ib_idx];
 454         if (ib_chunk->length_dw > RADEON_IB_VM_MAX_SIZE) {
 455                 DRM_ERROR("cs IB too big: %d\n", ib_chunk->length_dw);
 456                 return -EINVAL;
 457         }
 458         r =  radeon_ib_get(rdev, parser->ring, &parser->ib,
 459                            vm, ib_chunk->length_dw * 4);
 460         if (r) {
 461                 DRM_ERROR("Failed to get ib !\n");
 462                 return r;
 463         }
 464         parser->ib.length_dw = ib_chunk->length_dw;
 465         /* Copy the packet into the IB */
 466         if (DRM_COPY_FROM_USER(parser->ib.ptr, ib_chunk->user_ptr,
 467                                ib_chunk->length_dw * 4)) {
 468                 return -EFAULT;
 469         }
 470         r = radeon_ring_ib_parse(rdev, parser->ring, &parser->ib);
 471         if (r) {
 472                 return r;
 473         }
 474
 475         mutex_lock(&rdev->vm_manager.lock);
 476         mutex_lock(&vm->mutex);
 477         r = radeon_vm_alloc_pt(rdev, vm);
 478         if (r) {
 479                 goto out;
 480         }
 481         r = radeon_bo_vm_update_pte(parser, vm);
 482         if (r) {
 483                 goto out;
 484         }
 485         radeon_cs_sync_rings(parser);
 486         radeon_ib_sync_to(&parser->ib, vm->fence);
 487         radeon_ib_sync_to(&parser->ib, radeon_vm_grab_id(
 488                 rdev, vm, parser->ring));
 489
 490         if ((rdev->family >= CHIP_TAHITI) &&
 491             (parser->chunk_const_ib_idx != -1)) {
 492                 r = radeon_ib_schedule(rdev, &parser->ib, &parser->const_ib);
 493         } else {
 494                 r = radeon_ib_schedule(rdev, &parser->ib, NULL);
 495         }
 496
 497         if (!r) {
 498                 radeon_vm_fence(rdev, vm, parser->ib.fence);
 499         }
 500
 501 out:
 502         radeon_vm_add_to_lru(rdev, vm);
 503         mutex_unlock(&vm->mutex);
 504         mutex_unlock(&rdev->vm_manager.lock);
 505         return r;
 506 }
 507
 508 static int radeon_cs_handle_lockup(struct radeon_device *rdev, int r)
 509 {
 510         if (r == -EDEADLK) {
 511                 r = radeon_gpu_reset(rdev);
 512                 if (!r)
 513                         r = -EAGAIN;
 514         }
 515         return r;
 516 }
 517
 518 int radeon_cs_ioctl(struct drm_device *dev, void *data, struct drm_file *filp)
 519 {
 520         struct radeon_device *rdev = dev->dev_private;
 521         struct radeon_cs_parser parser;
 522         int r;
 523
 524         down_read(&rdev->exclusive_lock);
 525         if (!rdev->accel_working) {
 526                 up_read(&rdev->exclusive_lock);
 527                 return -EBUSY;
 528         }
 529         /* initialize parser */
 530         memset(&parser, 0, sizeof(struct radeon_cs_parser));
 531         parser.filp = filp;
 532         parser.rdev = rdev;
 533         parser.dev = rdev->dev;
 534         parser.family = rdev->family;
 535         r = radeon_cs_parser_init(&parser, data);
 536         if (r) {
 537                 DRM_ERROR("Failed to initialize parser !\n");
 538                 radeon_cs_parser_fini(&parser, r);
 539                 up_read(&rdev->exclusive_lock);
 540                 r = radeon_cs_handle_lockup(rdev, r);
 541                 return r;
 542         }
 543         r = radeon_cs_parser_relocs(&parser);
 544         if (r) {
 545                 if (r != -ERESTARTSYS)
 546                         DRM_ERROR("Failed to parse relocation %d!\n", r);
 547                 radeon_cs_parser_fini(&parser, r);
 548                 up_read(&rdev->exclusive_lock);
 549                 r = radeon_cs_handle_lockup(rdev, r);
 550                 return r;
 551         }
 552
 553         if (parser.ring == R600_RING_TYPE_UVD_INDEX)
 554                 radeon_uvd_note_usage(rdev);
 555
 556         r = radeon_cs_ib_chunk(rdev, &parser);
 557         if (r) {
 558                 goto out;
 559         }
 560         r = radeon_cs_ib_vm_chunk(rdev, &parser);
 561         if (r) {
 562                 goto out;
 563         }
 564 out:
 565         radeon_cs_parser_fini(&parser, r);
 566         up_read(&rdev->exclusive_lock);
 567         r = radeon_cs_handle_lockup(rdev, r);
 568         return r;
 569 }
 570
 571 int radeon_cs_finish_pages(struct radeon_cs_parser *p)
 572 {
 573         struct radeon_cs_chunk *ibc = &p->chunks[p->chunk_ib_idx];
 574         int i;
 575         int size = PAGE_SIZE;
 576
 577         for (i = ibc->last_copied_page + 1; i <= ibc->last_page_index; i++) {
 578                 if (i == ibc->last_page_index) {
 579                         size = (ibc->length_dw * 4) % PAGE_SIZE;
 580                         if (size == 0)
 581                                 size = PAGE_SIZE;
 582                 }
 583
 584                 if (DRM_COPY_FROM_USER(p->ib.ptr + (i * (PAGE_SIZE/4)),
 585                                        ibc->user_ptr + (i * PAGE_SIZE),
 586                                        size))
 587                         return -EFAULT;
 588         }
 589         return 0;
 590 }
 591
 592 static int radeon_cs_update_pages(struct radeon_cs_parser *p, int pg_idx)
 593 {
 594         int new_page;
 595         struct radeon_cs_chunk *ibc = &p->chunks[p->chunk_ib_idx];
 596         int i;
 597         int size = PAGE_SIZE;
 598         bool copy1 = (p->rdev && (p->rdev->flags & RADEON_IS_AGP)) ?
 599                 false : true;
 600
 601         for (i = ibc->last_copied_page + 1; i < pg_idx; i++) {
 602                 if (DRM_COPY_FROM_USER(p->ib.ptr + (i * (PAGE_SIZE/4)),
 603                                        ibc->user_ptr + (i * PAGE_SIZE),
 604                                        PAGE_SIZE)) {
 605                         p->parser_error = -EFAULT;
 606                         return 0;
 607                 }
 608         }
 609
 610         if (pg_idx == ibc->last_page_index) {
 611                 size = (ibc->length_dw * 4) % PAGE_SIZE;
 612                 if (size == 0)
 613                         size = PAGE_SIZE;
 614         }
 615
 616         new_page = ibc->kpage_idx[0] < ibc->kpage_idx[1] ? 0 : 1;
 617         if (copy1)
 618                 ibc->kpage[new_page] = p->ib.ptr + (pg_idx * (PAGE_SIZE / 4));
 619
 620         if (DRM_COPY_FROM_USER(ibc->kpage[new_page],
 621                                ibc->user_ptr + (pg_idx * PAGE_SIZE),
 622                                size)) {
 623                 p->parser_error = -EFAULT;
 624                 return 0;
 625         }
 626
 627         /* copy to IB for non single case */
 628         if (!copy1)
 629                 memcpy((void *)(p->ib.ptr+(pg_idx*(PAGE_SIZE/4))), ibc->kpage[new_page], size);
 630
 631         ibc->last_copied_page = pg_idx;
 632         ibc->kpage_idx[new_page] = pg_idx;
 633
 634         return new_page;
 635 }
 636
 637 u32 radeon_get_ib_value(struct radeon_cs_parser *p, int idx)
 638 {
 639         struct radeon_cs_chunk *ibc = &p->chunks[p->chunk_ib_idx];
 640         u32 pg_idx, pg_offset;
 641         u32 idx_value = 0;
 642         int new_page;
 643
 644         pg_idx = (idx * 4) / PAGE_SIZE;
 645         pg_offset = (idx * 4) % PAGE_SIZE;
 646
 647         if (ibc->kpage_idx[0] == pg_idx)
 648                 return ibc->kpage[0][pg_offset/4];
 649         if (ibc->kpage_idx[1] == pg_idx)
 650                 return ibc->kpage[1][pg_offset/4];
 651
 652         new_page = radeon_cs_update_pages(p, pg_idx);
 653         if (new_page < 0) {
 654                 p->parser_error = new_page;
 655                 return 0;
 656         }
 657
 658         idx_value = ibc->kpage[new_page][pg_offset/4];
 659         return idx_value;
 660 }
 661
 662 /**
 663  * radeon_cs_packet_parse() - parse cp packet and point ib index to next packet
 664  * @parser:     parser structure holding parsing context.
 665  * @pkt:        where to store packet information
 666  *
 667  * Assume that chunk_ib_index is properly set. Will return -EINVAL
 668  * if packet is bigger than remaining ib size. or if packets is unknown.
 669  **/
 670 int radeon_cs_packet_parse(struct radeon_cs_parser *p,
 671                            struct radeon_cs_packet *pkt,
 672                            unsigned idx)
 673 {
 674         struct radeon_cs_chunk *ib_chunk = &p->chunks[p->chunk_ib_idx];
 675         struct radeon_device *rdev = p->rdev;
 676         uint32_t header;
 677
 678         if (idx >= ib_chunk->length_dw) {
 679                 DRM_ERROR("Can not parse packet at %d after CS end %d !\n",
 680                           idx, ib_chunk->length_dw);
 681                 return -EINVAL;
 682         }
 683         header = radeon_get_ib_value(p, idx);
 684         pkt->idx = idx;
 685         pkt->type = RADEON_CP_PACKET_GET_TYPE(header);
 686         pkt->count = RADEON_CP_PACKET_GET_COUNT(header);
 687         pkt->one_reg_wr = 0;
 688         switch (pkt->type) {
 689         case RADEON_PACKET_TYPE0:
 690                 if (rdev->family < CHIP_R600) {
 691                         pkt->reg = R100_CP_PACKET0_GET_REG(header);
 692                         pkt->one_reg_wr =
 693                                 RADEON_CP_PACKET0_GET_ONE_REG_WR(header);
 694                 } else
 695                         pkt->reg = R600_CP_PACKET0_GET_REG(header);
 696                 break;
 697         case RADEON_PACKET_TYPE3:
 698                 pkt->opcode = RADEON_CP_PACKET3_GET_OPCODE(header);
 699                 break;
 700         case RADEON_PACKET_TYPE2:
 701                 pkt->count = -1;
 702                 break;
 703         default:
 704                 DRM_ERROR("Unknown packet type %d at %d !\n", pkt->type, idx);
 705                 return -EINVAL;
 706         }
 707         if ((pkt->count + 1 + pkt->idx) >= ib_chunk->length_dw) {
 708                 DRM_ERROR("Packet (%d:%d:%d) end after CS buffer (%d) !\n",
 709                           pkt->idx, pkt->type, pkt->count, ib_chunk->length_dw);
 710                 return -EINVAL;
 711         }
 712         return 0;
 713 }
 714
 715 /**
 716  * radeon_cs_packet_next_is_pkt3_nop() - test if the next packet is P3 NOP
 717  * @p:          structure holding the parser context.
 718  *
 719  * Check if the next packet is NOP relocation packet3.
 720  **/
 721 bool radeon_cs_packet_next_is_pkt3_nop(struct radeon_cs_parser *p)
 722 {
 723         struct radeon_cs_packet p3reloc;
 724         int r;
 725
 726         r = radeon_cs_packet_parse(p, &p3reloc, p->idx);
 727         if (r)
 728                 return false;
 729         if (p3reloc.type != RADEON_PACKET_TYPE3)
 730                 return false;
 731         if (p3reloc.opcode != RADEON_PACKET3_NOP)
 732                 return false;
 733         return true;
 734 }
 735
 736 /**
 737  * radeon_cs_dump_packet() - dump raw packet context
 738  * @p:          structure holding the parser context.
 739  * @pkt:        structure holding the packet.
 740  *
 741  * Used mostly for debugging and error reporting.
 742  **/
 743 void radeon_cs_dump_packet(struct radeon_cs_parser *p,
 744                            struct radeon_cs_packet *pkt)
 745 {
 746         volatile uint32_t *ib;
 747         unsigned i;
 748         unsigned idx;
 749
 750         ib = p->ib.ptr;
 751         idx = pkt->idx;
 752         for (i = 0; i <= (pkt->count + 1); i++, idx++)
 753                 DRM_INFO("ib[%d]=0x%08X\n", idx, ib[idx]);
 754 }
 755
 756 /**
 757  * radeon_cs_packet_next_reloc() - parse next (should be reloc) packet
 758  * @parser:             parser structure holding parsing context.
 759  * @data:               pointer to relocation data
 760  * @offset_start:       starting offset
 761  * @offset_mask:        offset mask (to align start offset on)
 762  * @reloc:              reloc informations
 763  *
 764  * Check if next packet is relocation packet3, do bo validation and compute
 765  * GPU offset using the provided start.
 766  **/
 767 int radeon_cs_packet_next_reloc(struct radeon_cs_parser *p,
 768                                 struct radeon_cs_reloc **cs_reloc,
 769                                 int nomm)
 770 {
 771         struct radeon_cs_chunk *relocs_chunk;
 772         struct radeon_cs_packet p3reloc;
 773         unsigned idx;
 774         int r;
 775
 776         if (p->chunk_relocs_idx == -1) {
 777                 DRM_ERROR("No relocation chunk !\n");
 778                 return -EINVAL;
 779         }
 780         *cs_reloc = NULL;
 781         relocs_chunk = &p->chunks[p->chunk_relocs_idx];
 782         r = radeon_cs_packet_parse(p, &p3reloc, p->idx);
 783         if (r)
 784                 return r;
 785         p->idx += p3reloc.count + 2;
 786         if (p3reloc.type != RADEON_PACKET_TYPE3 ||
 787             p3reloc.opcode != RADEON_PACKET3_NOP) {
 788                 DRM_ERROR("No packet3 for relocation for packet at %d.\n",
 789                           p3reloc.idx);
 790                 radeon_cs_dump_packet(p, &p3reloc);
 791                 return -EINVAL;
 792         }
 793         idx = radeon_get_ib_value(p, p3reloc.idx + 1);
 794         if (idx >= relocs_chunk->length_dw) {
 795                 DRM_ERROR("Relocs at %d after relocations chunk end %d !\n",
 796                           idx, relocs_chunk->length_dw);
 797                 radeon_cs_dump_packet(p, &p3reloc);
 798                 return -EINVAL;
 799         }
 800         /* FIXME: we assume reloc size is 4 dwords */
 801         if (nomm) {
 802                 *cs_reloc = p->relocs;
 803                 (*cs_reloc)->lobj.gpu_offset =
 804                         (u64)relocs_chunk->kdata[idx + 3] << 32;
 805                 (*cs_reloc)->lobj.gpu_offset |= relocs_chunk->kdata[idx + 0];
 806         } else
 807                 *cs_reloc = p->relocs_ptr[(idx / 4)];
 808         return 0;
 809 }