drivers/gpu/drm/radeon/radeon_cs.c

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