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 <linux/list_sort.h>
  28 #include <drm/drmP.h>
  29 #include <drm/radeon_drm.h>
  30 #include "radeon_reg.h"
  31 #include "radeon.h"
  32 #include "radeon_trace.h"
  33
  34 #define RADEON_CS_MAX_PRIORITY          32u
  35 #define RADEON_CS_NUM_BUCKETS           (RADEON_CS_MAX_PRIORITY + 1)
  36
  37 /* This is based on the bucket sort with O(n) time complexity.
  38  * An item with priority "i" is added to bucket[i]. The lists are then
  39  * concatenated in descending order.
  40  */
  41 struct radeon_cs_buckets {
  42         struct list_head bucket[RADEON_CS_NUM_BUCKETS];
  43 };
  44
  45 static void radeon_cs_buckets_init(struct radeon_cs_buckets *b)
  46 {
  47         unsigned i;
  48
  49         for (i = 0; i < RADEON_CS_NUM_BUCKETS; i++)
  50                 INIT_LIST_HEAD(&b->bucket[i]);
  51 }
  52
  53 static void radeon_cs_buckets_add(struct radeon_cs_buckets *b,
  54                                   struct list_head *item, unsigned priority)
  55 {
  56         /* Since buffers which appear sooner in the relocation list are
  57          * likely to be used more often than buffers which appear later
  58          * in the list, the sort mustn't change the ordering of buffers
  59          * with the same priority, i.e. it must be stable.
  60          */
  61         list_add_tail(item, &b->bucket[min(priority, RADEON_CS_MAX_PRIORITY)]);
  62 }
  63
  64 static void radeon_cs_buckets_get_list(struct radeon_cs_buckets *b,
  65                                        struct list_head *out_list)
  66 {
  67         unsigned i;
  68
  69         /* Connect the sorted buckets in the output list. */
  70         for (i = 0; i < RADEON_CS_NUM_BUCKETS; i++) {
  71                 list_splice(&b->bucket[i], out_list);
  72         }
  73 }
  74
  75 static int radeon_cs_parser_relocs(struct radeon_cs_parser *p)
  76 {
  77         struct drm_device *ddev = p->rdev->ddev;
  78         struct radeon_cs_chunk *chunk;
  79         struct radeon_cs_buckets buckets;
  80         unsigned i, j;
  81         bool duplicate;
  82
  83         if (p->chunk_relocs_idx == -1) {
  84                 return 0;
  85         }
  86         chunk = &p->chunks[p->chunk_relocs_idx];
  87         p->dma_reloc_idx = 0;
  88         /* FIXME: we assume that each relocs use 4 dwords */
  89         p->nrelocs = chunk->length_dw / 4;
  90         p->relocs_ptr = kcalloc(p->nrelocs, sizeof(void *), GFP_KERNEL);
  91         if (p->relocs_ptr == NULL) {
  92                 return -ENOMEM;
  93         }
  94         p->relocs = kcalloc(p->nrelocs, sizeof(struct radeon_cs_reloc), GFP_KERNEL);
  95         if (p->relocs == NULL) {
  96                 return -ENOMEM;
  97         }
  98
  99         radeon_cs_buckets_init(&buckets);
 100
 101         for (i = 0; i < p->nrelocs; i++) {
 102                 struct drm_radeon_cs_reloc *r;
 103                 unsigned priority;
 104
 105                 duplicate = false;
 106                 r = (struct drm_radeon_cs_reloc *)&chunk->kdata[i*4];
 107                 for (j = 0; j < i; j++) {
 108                         if (r->handle == p->relocs[j].handle) {
 109                                 p->relocs_ptr[i] = &p->relocs[j];
 110                                 duplicate = true;
 111                                 break;
 112                         }
 113                 }
 114                 if (duplicate) {
 115                         p->relocs[i].handle = 0;
 116                         continue;
 117                 }
 118
 119                 p->relocs[i].gobj = drm_gem_object_lookup(ddev, p->filp,
 120                                                           r->handle);
 121                 if (p->relocs[i].gobj == NULL) {
 122                         DRM_ERROR("gem object lookup failed 0x%x\n",
 123                                   r->handle);
 124                         return -ENOENT;
 125                 }
 126                 p->relocs_ptr[i] = &p->relocs[i];
 127                 p->relocs[i].robj = gem_to_radeon_bo(p->relocs[i].gobj);
 128
 129                 /* The userspace buffer priorities are from 0 to 15. A higher
 130                  * number means the buffer is more important.
 131                  * Also, the buffers used for write have a higher priority than
 132                  * the buffers used for read only, which doubles the range
 133                  * to 0 to 31. 32 is reserved for the kernel driver.
 134                  */
 135                 priority = (r->flags & 0xf) * 2 + !!r->write_domain;
 136
 137                 /* the first reloc of an UVD job is the msg and that must be in
 138                    VRAM, also but everything into VRAM on AGP cards to avoid
 139                    image corruptions */
 140                 if (p->ring == R600_RING_TYPE_UVD_INDEX &&
 141                     (i == 0 || drm_pci_device_is_agp(p->rdev->ddev))) {
 142                         /* TODO: is this still needed for NI+ ? */
 143                         p->relocs[i].prefered_domains =
 144                                 RADEON_GEM_DOMAIN_VRAM;
 145
 146                         p->relocs[i].allowed_domains =
 147                                 RADEON_GEM_DOMAIN_VRAM;
 148
 149                         /* prioritize this over any other relocation */
 150                         priority = RADEON_CS_MAX_PRIORITY;
 151                 } else {
 152                         uint32_t domain = r->write_domain ?
 153                                 r->write_domain : r->read_domains;
 154
 155                         if (domain & RADEON_GEM_DOMAIN_CPU) {
 156                                 DRM_ERROR("RADEON_GEM_DOMAIN_CPU is not valid "
 157                                           "for command submission\n");
 158                                 return -EINVAL;
 159                         }
 160
 161                         p->relocs[i].prefered_domains = domain;
 162                         if (domain == RADEON_GEM_DOMAIN_VRAM)
 163                                 domain |= RADEON_GEM_DOMAIN_GTT;
 164                         p->relocs[i].allowed_domains = domain;
 165                 }
 166
 167                 p->relocs[i].tv.bo = &p->relocs[i].robj->tbo;
 168                 p->relocs[i].handle = r->handle;
 169
 170                 radeon_cs_buckets_add(&buckets, &p->relocs[i].tv.head,
 171                                       priority);
 172         }
 173
 174         radeon_cs_buckets_get_list(&buckets, &p->validated);
 175
 176         if (p->cs_flags & RADEON_CS_USE_VM)
 177                 p->vm_bos = radeon_vm_get_bos(p->rdev, p->ib.vm,
 178                                               &p->validated);
 179
 180         return radeon_bo_list_validate(p->rdev, &p->ticket, &p->validated, p->ring);
 181 }
 182
 183 static int radeon_cs_get_ring(struct radeon_cs_parser *p, u32 ring, s32 priority)
 184 {
 185         p->priority = priority;
 186
 187         switch (ring) {
 188         default:
 189                 DRM_ERROR("unknown ring id: %d\n", ring);
 190                 return -EINVAL;
 191         case RADEON_CS_RING_GFX:
 192                 p->ring = RADEON_RING_TYPE_GFX_INDEX;
 193                 break;
 194         case RADEON_CS_RING_COMPUTE:
 195                 if (p->rdev->family >= CHIP_TAHITI) {
 196                         if (p->priority > 0)
 197                                 p->ring = CAYMAN_RING_TYPE_CP1_INDEX;
 198                         else
 199                                 p->ring = CAYMAN_RING_TYPE_CP2_INDEX;
 200                 } else
 201                         p->ring = RADEON_RING_TYPE_GFX_INDEX;
 202                 break;
 203         case RADEON_CS_RING_DMA:
 204                 if (p->rdev->family >= CHIP_CAYMAN) {
 205                         if (p->priority > 0)
 206                                 p->ring = R600_RING_TYPE_DMA_INDEX;
 207                         else
 208                                 p->ring = CAYMAN_RING_TYPE_DMA1_INDEX;
 209                 } else if (p->rdev->family >= CHIP_RV770) {
 210                         p->ring = R600_RING_TYPE_DMA_INDEX;
 211                 } else {
 212                         return -EINVAL;
 213                 }
 214                 break;
 215         case RADEON_CS_RING_UVD:
 216                 p->ring = R600_RING_TYPE_UVD_INDEX;
 217                 break;
 218         case RADEON_CS_RING_VCE:
 219                 /* TODO: only use the low priority ring for now */
 220                 p->ring = TN_RING_TYPE_VCE1_INDEX;
 221                 break;
 222         }
 223         return 0;
 224 }
 225
 226 static void radeon_cs_sync_rings(struct radeon_cs_parser *p)
 227 {
 228         int i;
 229
 230         for (i = 0; i < p->nrelocs; i++) {
 231                 if (!p->relocs[i].robj)
 232                         continue;
 233
 234                 radeon_semaphore_sync_to(p->ib.semaphore,
 235                                          p->relocs[i].robj->tbo.sync_obj);
 236         }
 237 }
 238
 239 /* XXX: note that this is called from the legacy UMS CS ioctl as well */
 240 int radeon_cs_parser_init(struct radeon_cs_parser *p, void *data)
 241 {
 242         struct drm_radeon_cs *cs = data;
 243         uint64_t *chunk_array_ptr;
 244         unsigned size, i;
 245         u32 ring = RADEON_CS_RING_GFX;
 246         s32 priority = 0;
 247
 248         if (!cs->num_chunks) {
 249                 return 0;
 250         }
 251         /* get chunks */
 252         INIT_LIST_HEAD(&p->validated);
 253         p->idx = 0;
 254         p->ib.sa_bo = NULL;
 255         p->ib.semaphore = NULL;
 256         p->const_ib.sa_bo = NULL;
 257         p->const_ib.semaphore = NULL;
 258         p->chunk_ib_idx = -1;
 259         p->chunk_relocs_idx = -1;
 260         p->chunk_flags_idx = -1;
 261         p->chunk_const_ib_idx = -1;
 262         p->chunks_array = kcalloc(cs->num_chunks, sizeof(uint64_t), GFP_KERNEL);
 263         if (p->chunks_array == NULL) {
 264                 return -ENOMEM;
 265         }
 266         chunk_array_ptr = (uint64_t *)(unsigned long)(cs->chunks);
 267         if (copy_from_user(p->chunks_array, chunk_array_ptr,
 268                                sizeof(uint64_t)*cs->num_chunks)) {
 269                 return -EFAULT;
 270         }
 271         p->cs_flags = 0;
 272         p->nchunks = cs->num_chunks;
 273         p->chunks = kcalloc(p->nchunks, sizeof(struct radeon_cs_chunk), GFP_KERNEL);
 274         if (p->chunks == NULL) {
 275                 return -ENOMEM;
 276         }
 277         for (i = 0; i < p->nchunks; i++) {
 278                 struct drm_radeon_cs_chunk __user **chunk_ptr = NULL;
 279                 struct drm_radeon_cs_chunk user_chunk;
 280                 uint32_t __user *cdata;
 281
 282                 chunk_ptr = (void __user*)(unsigned long)p->chunks_array[i];
 283                 if (copy_from_user(&user_chunk, chunk_ptr,
 284                                        sizeof(struct drm_radeon_cs_chunk))) {
 285                         return -EFAULT;
 286                 }
 287                 p->chunks[i].length_dw = user_chunk.length_dw;
 288                 p->chunks[i].chunk_id = user_chunk.chunk_id;
 289                 if (p->chunks[i].chunk_id == RADEON_CHUNK_ID_RELOCS) {
 290                         p->chunk_relocs_idx = i;
 291                 }
 292                 if (p->chunks[i].chunk_id == RADEON_CHUNK_ID_IB) {
 293                         p->chunk_ib_idx = i;
 294                         /* zero length IB isn't useful */
 295                         if (p->chunks[i].length_dw == 0)
 296                                 return -EINVAL;
 297                 }
 298                 if (p->chunks[i].chunk_id == RADEON_CHUNK_ID_CONST_IB) {
 299                         p->chunk_const_ib_idx = i;
 300                         /* zero length CONST IB isn't useful */
 301                         if (p->chunks[i].length_dw == 0)
 302                                 return -EINVAL;
 303                 }
 304                 if (p->chunks[i].chunk_id == RADEON_CHUNK_ID_FLAGS) {
 305                         p->chunk_flags_idx = i;
 306                         /* zero length flags aren't useful */
 307                         if (p->chunks[i].length_dw == 0)
 308                                 return -EINVAL;
 309                 }
 310
 311                 size = p->chunks[i].length_dw;
 312                 cdata = (void __user *)(unsigned long)user_chunk.chunk_data;
 313                 p->chunks[i].user_ptr = cdata;
 314                 if (p->chunks[i].chunk_id == RADEON_CHUNK_ID_CONST_IB)
 315                         continue;
 316
 317                 if (p->chunks[i].chunk_id == RADEON_CHUNK_ID_IB) {
 318                         if (!p->rdev || !(p->rdev->flags & RADEON_IS_AGP))
 319                                 continue;
 320                 }
 321
 322                 p->chunks[i].kdata = drm_malloc_ab(size, sizeof(uint32_t));
 323                 size *= sizeof(uint32_t);
 324                 if (p->chunks[i].kdata == NULL) {
 325                         return -ENOMEM;
 326                 }
 327                 if (copy_from_user(p->chunks[i].kdata, cdata, size)) {
 328                         return -EFAULT;
 329                 }
 330                 if (p->chunks[i].chunk_id == RADEON_CHUNK_ID_FLAGS) {
 331                         p->cs_flags = p->chunks[i].kdata[0];
 332                         if (p->chunks[i].length_dw > 1)
 333                                 ring = p->chunks[i].kdata[1];
 334                         if (p->chunks[i].length_dw > 2)
 335                                 priority = (s32)p->chunks[i].kdata[2];
 336                 }
 337         }
 338
 339         /* these are KMS only */
 340         if (p->rdev) {
 341                 if ((p->cs_flags & RADEON_CS_USE_VM) &&
 342                     !p->rdev->vm_manager.enabled) {
 343                         DRM_ERROR("VM not active on asic!\n");
 344                         return -EINVAL;
 345                 }
 346
 347                 if (radeon_cs_get_ring(p, ring, priority))
 348                         return -EINVAL;
 349
 350                 /* we only support VM on some SI+ rings */
 351                 if ((p->cs_flags & RADEON_CS_USE_VM) == 0) {
 352                         if (p->rdev->asic->ring[p->ring]->cs_parse == NULL) {
 353                                 DRM_ERROR("Ring %d requires VM!\n", p->ring);
 354                                 return -EINVAL;
 355                         }
 356                 } else {
 357                         if (p->rdev->asic->ring[p->ring]->ib_parse == NULL) {
 358                                 DRM_ERROR("VM not supported on ring %d!\n",
 359                                           p->ring);
 360                                 return -EINVAL;
 361                         }
 362                 }
 363         }
 364
 365         return 0;
 366 }
 367
 368 static int cmp_size_smaller_first(void *priv, struct list_head *a,
 369                                   struct list_head *b)
 370 {
 371         struct radeon_cs_reloc *la = list_entry(a, struct radeon_cs_reloc, tv.head);
 372         struct radeon_cs_reloc *lb = list_entry(b, struct radeon_cs_reloc, tv.head);
 373
 374         /* Sort A before B if A is smaller. */
 375         return (int)la->robj->tbo.num_pages - (int)lb->robj->tbo.num_pages;
 376 }
 377
 378 /**
 379  * cs_parser_fini() - clean parser states
 380  * @parser:     parser structure holding parsing context.
 381  * @error:      error number
 382  *
 383  * If error is set than unvalidate buffer, otherwise just free memory
 384  * used by parsing context.
 385  **/
 386 static void radeon_cs_parser_fini(struct radeon_cs_parser *parser, int error, bool backoff)
 387 {
 388         unsigned i;
 389
 390         if (!error) {
 391                 /* Sort the buffer list from the smallest to largest buffer,
 392                  * which affects the order of buffers in the LRU list.
 393                  * This assures that the smallest buffers are added first
 394                  * to the LRU list, so they are likely to be later evicted
 395                  * first, instead of large buffers whose eviction is more
 396                  * expensive.
 397                  *
 398                  * This slightly lowers the number of bytes moved by TTM
 399                  * per frame under memory pressure.
 400                  */
 401                 list_sort(NULL, &parser->validated, cmp_size_smaller_first);
 402
 403                 ttm_eu_fence_buffer_objects(&parser->ticket,
 404                                             &parser->validated,
 405                                             parser->ib.fence);
 406         } else if (backoff) {
 407                 ttm_eu_backoff_reservation(&parser->ticket,
 408                                            &parser->validated);
 409         }
 410
 411         if (parser->relocs != NULL) {
 412                 for (i = 0; i < parser->nrelocs; i++) {
 413                         if (parser->relocs[i].gobj)
 414                                 drm_gem_object_unreference_unlocked(parser->relocs[i].gobj);
 415                 }
 416         }
 417         kfree(parser->track);
 418         kfree(parser->relocs);
 419         kfree(parser->relocs_ptr);
 420         kfree(parser->vm_bos);
 421         for (i = 0; i < parser->nchunks; i++)
 422                 drm_free_large(parser->chunks[i].kdata);
 423         kfree(parser->chunks);
 424         kfree(parser->chunks_array);
 425         radeon_ib_free(parser->rdev, &parser->ib);
 426         radeon_ib_free(parser->rdev, &parser->const_ib);
 427 }
 428
 429 static int radeon_cs_ib_chunk(struct radeon_device *rdev,
 430                               struct radeon_cs_parser *parser)
 431 {
 432         int r;
 433
 434         if (parser->chunk_ib_idx == -1)
 435                 return 0;
 436
 437         if (parser->cs_flags & RADEON_CS_USE_VM)
 438                 return 0;
 439
 440         r = radeon_cs_parse(rdev, parser->ring, parser);
 441         if (r || parser->parser_error) {
 442                 DRM_ERROR("Invalid command stream !\n");
 443                 return r;
 444         }
 445
 446         if (parser->ring == R600_RING_TYPE_UVD_INDEX)
 447                 radeon_uvd_note_usage(rdev);
 448         else if ((parser->ring == TN_RING_TYPE_VCE1_INDEX) ||
 449                  (parser->ring == TN_RING_TYPE_VCE2_INDEX))
 450                 radeon_vce_note_usage(rdev);
 451
 452         radeon_cs_sync_rings(parser);
 453         r = radeon_ib_schedule(rdev, &parser->ib, NULL);
 454         if (r) {
 455                 DRM_ERROR("Failed to schedule IB !\n");
 456         }
 457         return r;
 458 }
 459
 460 static int radeon_bo_vm_update_pte(struct radeon_cs_parser *p,
 461                                    struct radeon_vm *vm)
 462 {
 463         struct radeon_device *rdev = p->rdev;
 464         int i, r;
 465
 466         r = radeon_vm_update_page_directory(rdev, vm);
 467         if (r)
 468                 return r;
 469
 470         r = radeon_vm_bo_update(rdev, vm, rdev->ring_tmp_bo.bo,
 471                                 &rdev->ring_tmp_bo.bo->tbo.mem);
 472         if (r)
 473                 return r;
 474
 475         for (i = 0; i < p->nrelocs; i++) {
 476                 struct radeon_bo *bo;
 477
 478                 /* ignore duplicates */
 479                 if (p->relocs_ptr[i] != &p->relocs[i])
 480                         continue;
 481
 482                 bo = p->relocs[i].robj;
 483                 r = radeon_vm_bo_update(rdev, vm, bo, &bo->tbo.mem);
 484                 if (r)
 485                         return r;
 486         }
 487         return 0;
 488 }
 489
 490 static int radeon_cs_ib_vm_chunk(struct radeon_device *rdev,
 491                                  struct radeon_cs_parser *parser)
 492 {
 493         struct radeon_fpriv *fpriv = parser->filp->driver_priv;
 494         struct radeon_vm *vm = &fpriv->vm;
 495         int r;
 496
 497         if (parser->chunk_ib_idx == -1)
 498                 return 0;
 499         if ((parser->cs_flags & RADEON_CS_USE_VM) == 0)
 500                 return 0;
 501
 502         if (parser->const_ib.length_dw) {
 503                 r = radeon_ring_ib_parse(rdev, parser->ring, &parser->const_ib);
 504                 if (r) {
 505                         return r;
 506                 }
 507         }
 508
 509         r = radeon_ring_ib_parse(rdev, parser->ring, &parser->ib);
 510         if (r) {
 511                 return r;
 512         }
 513
 514         if (parser->ring == R600_RING_TYPE_UVD_INDEX)
 515                 radeon_uvd_note_usage(rdev);
 516
 517         mutex_lock(&vm->mutex);
 518         r = radeon_bo_vm_update_pte(parser, vm);
 519         if (r) {
 520                 goto out;
 521         }
 522         radeon_cs_sync_rings(parser);
 523         radeon_semaphore_sync_to(parser->ib.semaphore, vm->fence);
 524
 525         if ((rdev->family >= CHIP_TAHITI) &&
 526             (parser->chunk_const_ib_idx != -1)) {
 527                 r = radeon_ib_schedule(rdev, &parser->ib, &parser->const_ib);
 528         } else {
 529                 r = radeon_ib_schedule(rdev, &parser->ib, NULL);
 530         }
 531
 532 out:
 533         mutex_unlock(&vm->mutex);
 534         return r;
 535 }
 536
 537 static int radeon_cs_handle_lockup(struct radeon_device *rdev, int r)
 538 {
 539         if (r == -EDEADLK) {
 540                 r = radeon_gpu_reset(rdev);
 541                 if (!r)
 542                         r = -EAGAIN;
 543         }
 544         return r;
 545 }
 546
 547 static int radeon_cs_ib_fill(struct radeon_device *rdev, struct radeon_cs_parser *parser)
 548 {
 549         struct radeon_cs_chunk *ib_chunk;
 550         struct radeon_vm *vm = NULL;
 551         int r;
 552
 553         if (parser->chunk_ib_idx == -1)
 554                 return 0;
 555
 556         if (parser->cs_flags & RADEON_CS_USE_VM) {
 557                 struct radeon_fpriv *fpriv = parser->filp->driver_priv;
 558                 vm = &fpriv->vm;
 559
 560                 if ((rdev->family >= CHIP_TAHITI) &&
 561                     (parser->chunk_const_ib_idx != -1)) {
 562                         ib_chunk = &parser->chunks[parser->chunk_const_ib_idx];
 563                         if (ib_chunk->length_dw > RADEON_IB_VM_MAX_SIZE) {
 564                                 DRM_ERROR("cs IB CONST too big: %d\n", ib_chunk->length_dw);
 565                                 return -EINVAL;
 566                         }
 567                         r =  radeon_ib_get(rdev, parser->ring, &parser->const_ib,
 568                                            vm, ib_chunk->length_dw * 4);
 569                         if (r) {
 570                                 DRM_ERROR("Failed to get const ib !\n");
 571                                 return r;
 572                         }
 573                         parser->const_ib.is_const_ib = true;
 574                         parser->const_ib.length_dw = ib_chunk->length_dw;
 575                         if (copy_from_user(parser->const_ib.ptr,
 576                                                ib_chunk->user_ptr,
 577                                                ib_chunk->length_dw * 4))
 578                                 return -EFAULT;
 579                 }
 580
 581                 ib_chunk = &parser->chunks[parser->chunk_ib_idx];
 582                 if (ib_chunk->length_dw > RADEON_IB_VM_MAX_SIZE) {
 583                         DRM_ERROR("cs IB too big: %d\n", ib_chunk->length_dw);
 584                         return -EINVAL;
 585                 }
 586         }
 587         ib_chunk = &parser->chunks[parser->chunk_ib_idx];
 588
 589         r =  radeon_ib_get(rdev, parser->ring, &parser->ib,
 590                            vm, ib_chunk->length_dw * 4);
 591         if (r) {
 592                 DRM_ERROR("Failed to get ib !\n");
 593                 return r;
 594         }
 595         parser->ib.length_dw = ib_chunk->length_dw;
 596         if (ib_chunk->kdata)
 597                 memcpy(parser->ib.ptr, ib_chunk->kdata, ib_chunk->length_dw * 4);
 598         else if (copy_from_user(parser->ib.ptr, ib_chunk->user_ptr, ib_chunk->length_dw * 4))
 599                 return -EFAULT;
 600         return 0;
 601 }
 602
 603 int radeon_cs_ioctl(struct drm_device *dev, void *data, struct drm_file *filp)
 604 {
 605         struct radeon_device *rdev = dev->dev_private;
 606         struct radeon_cs_parser parser;
 607         int r;
 608
 609         down_read(&rdev->exclusive_lock);
 610         if (!rdev->accel_working) {
 611                 up_read(&rdev->exclusive_lock);
 612                 return -EBUSY;
 613         }
 614         /* initialize parser */
 615         memset(&parser, 0, sizeof(struct radeon_cs_parser));
 616         parser.filp = filp;
 617         parser.rdev = rdev;
 618         parser.dev = rdev->dev;
 619         parser.family = rdev->family;
 620         r = radeon_cs_parser_init(&parser, data);
 621         if (r) {
 622                 DRM_ERROR("Failed to initialize parser !\n");
 623                 radeon_cs_parser_fini(&parser, r, false);
 624                 up_read(&rdev->exclusive_lock);
 625                 r = radeon_cs_handle_lockup(rdev, r);
 626                 return r;
 627         }
 628
 629         r = radeon_cs_ib_fill(rdev, &parser);
 630         if (!r) {
 631                 r = radeon_cs_parser_relocs(&parser);
 632                 if (r && r != -ERESTARTSYS)
 633                         DRM_ERROR("Failed to parse relocation %d!\n", r);
 634         }
 635
 636         if (r) {
 637                 radeon_cs_parser_fini(&parser, r, false);
 638                 up_read(&rdev->exclusive_lock);
 639                 r = radeon_cs_handle_lockup(rdev, r);
 640                 return r;
 641         }
 642
 643         trace_radeon_cs(&parser);
 644
 645         r = radeon_cs_ib_chunk(rdev, &parser);
 646         if (r) {
 647                 goto out;
 648         }
 649         r = radeon_cs_ib_vm_chunk(rdev, &parser);
 650         if (r) {
 651                 goto out;
 652         }
 653 out:
 654         radeon_cs_parser_fini(&parser, r, true);
 655         up_read(&rdev->exclusive_lock);
 656         r = radeon_cs_handle_lockup(rdev, r);
 657         return r;
 658 }
 659
 660 /**
 661  * radeon_cs_packet_parse() - parse cp packet and point ib index to next packet
 662  * @parser:     parser structure holding parsing context.
 663  * @pkt:        where to store packet information
 664  *
 665  * Assume that chunk_ib_index is properly set. Will return -EINVAL
 666  * if packet is bigger than remaining ib size. or if packets is unknown.
 667  **/
 668 int radeon_cs_packet_parse(struct radeon_cs_parser *p,
 669                            struct radeon_cs_packet *pkt,
 670                            unsigned idx)
 671 {
 672         struct radeon_cs_chunk *ib_chunk = &p->chunks[p->chunk_ib_idx];
 673         struct radeon_device *rdev = p->rdev;
 674         uint32_t header;
 675
 676         if (idx >= ib_chunk->length_dw) {
 677                 DRM_ERROR("Can not parse packet at %d after CS end %d !\n",
 678                           idx, ib_chunk->length_dw);
 679                 return -EINVAL;
 680         }
 681         header = radeon_get_ib_value(p, idx);
 682         pkt->idx = idx;
 683         pkt->type = RADEON_CP_PACKET_GET_TYPE(header);
 684         pkt->count = RADEON_CP_PACKET_GET_COUNT(header);
 685         pkt->one_reg_wr = 0;
 686         switch (pkt->type) {
 687         case RADEON_PACKET_TYPE0:
 688                 if (rdev->family < CHIP_R600) {
 689                         pkt->reg = R100_CP_PACKET0_GET_REG(header);
 690                         pkt->one_reg_wr =
 691                                 RADEON_CP_PACKET0_GET_ONE_REG_WR(header);
 692                 } else
 693                         pkt->reg = R600_CP_PACKET0_GET_REG(header);
 694                 break;
 695         case RADEON_PACKET_TYPE3:
 696                 pkt->opcode = RADEON_CP_PACKET3_GET_OPCODE(header);
 697                 break;
 698         case RADEON_PACKET_TYPE2:
 699                 pkt->count = -1;
 700                 break;
 701         default:
 702                 DRM_ERROR("Unknown packet type %d at %d !\n", pkt->type, idx);
 703                 return -EINVAL;
 704         }
 705         if ((pkt->count + 1 + pkt->idx) >= ib_chunk->length_dw) {
 706                 DRM_ERROR("Packet (%d:%d:%d) end after CS buffer (%d) !\n",
 707                           pkt->idx, pkt->type, pkt->count, ib_chunk->length_dw);
 708                 return -EINVAL;
 709         }
 710         return 0;
 711 }
 712
 713 /**
 714  * radeon_cs_packet_next_is_pkt3_nop() - test if the next packet is P3 NOP
 715  * @p:          structure holding the parser context.
 716  *
 717  * Check if the next packet is NOP relocation packet3.
 718  **/
 719 bool radeon_cs_packet_next_is_pkt3_nop(struct radeon_cs_parser *p)
 720 {
 721         struct radeon_cs_packet p3reloc;
 722         int r;
 723
 724         r = radeon_cs_packet_parse(p, &p3reloc, p->idx);
 725         if (r)
 726                 return false;
 727         if (p3reloc.type != RADEON_PACKET_TYPE3)
 728                 return false;
 729         if (p3reloc.opcode != RADEON_PACKET3_NOP)
 730                 return false;
 731         return true;
 732 }
 733
 734 /**
 735  * radeon_cs_dump_packet() - dump raw packet context
 736  * @p:          structure holding the parser context.
 737  * @pkt:        structure holding the packet.
 738  *
 739  * Used mostly for debugging and error reporting.
 740  **/
 741 void radeon_cs_dump_packet(struct radeon_cs_parser *p,
 742                            struct radeon_cs_packet *pkt)
 743 {
 744         volatile uint32_t *ib;
 745         unsigned i;
 746         unsigned idx;
 747
 748         ib = p->ib.ptr;
 749         idx = pkt->idx;
 750         for (i = 0; i <= (pkt->count + 1); i++, idx++)
 751                 DRM_INFO("ib[%d]=0x%08X\n", idx, ib[idx]);
 752 }
 753
 754 /**
 755  * radeon_cs_packet_next_reloc() - parse next (should be reloc) packet
 756  * @parser:             parser structure holding parsing context.
 757  * @data:               pointer to relocation data
 758  * @offset_start:       starting offset
 759  * @offset_mask:        offset mask (to align start offset on)
 760  * @reloc:              reloc informations
 761  *
 762  * Check if next packet is relocation packet3, do bo validation and compute
 763  * GPU offset using the provided start.
 764  **/
 765 int radeon_cs_packet_next_reloc(struct radeon_cs_parser *p,
 766                                 struct radeon_cs_reloc **cs_reloc,
 767                                 int nomm)
 768 {
 769         struct radeon_cs_chunk *relocs_chunk;
 770         struct radeon_cs_packet p3reloc;
 771         unsigned idx;
 772         int r;
 773
 774         if (p->chunk_relocs_idx == -1) {
 775                 DRM_ERROR("No relocation chunk !\n");
 776                 return -EINVAL;
 777         }
 778         *cs_reloc = NULL;
 779         relocs_chunk = &p->chunks[p->chunk_relocs_idx];
 780         r = radeon_cs_packet_parse(p, &p3reloc, p->idx);
 781         if (r)
 782                 return r;
 783         p->idx += p3reloc.count + 2;
 784         if (p3reloc.type != RADEON_PACKET_TYPE3 ||
 785             p3reloc.opcode != RADEON_PACKET3_NOP) {
 786                 DRM_ERROR("No packet3 for relocation for packet at %d.\n",
 787                           p3reloc.idx);
 788                 radeon_cs_dump_packet(p, &p3reloc);
 789                 return -EINVAL;
 790         }
 791         idx = radeon_get_ib_value(p, p3reloc.idx + 1);
 792         if (idx >= relocs_chunk->length_dw) {
 793                 DRM_ERROR("Relocs at %d after relocations chunk end %d !\n",
 794                           idx, relocs_chunk->length_dw);
 795                 radeon_cs_dump_packet(p, &p3reloc);
 796                 return -EINVAL;
 797         }
 798         /* FIXME: we assume reloc size is 4 dwords */
 799         if (nomm) {
 800                 *cs_reloc = p->relocs;
 801                 (*cs_reloc)->gpu_offset =
 802                         (u64)relocs_chunk->kdata[idx + 3] << 32;
 803                 (*cs_reloc)->gpu_offset |= relocs_chunk->kdata[idx + 0];
 804         } else
 805                 *cs_reloc = p->relocs_ptr[(idx / 4)];
 806         return 0;
 807 }