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                 } else
  88                         p->relocs[i].handle = 0;
  89         }
  90         return radeon_bo_list_validate(&p->validated);
  91 }
  92
  93 static int radeon_cs_get_ring(struct radeon_cs_parser *p, u32 ring, s32 priority)
  94 {
  95         p->priority = priority;
  96
  97         switch (ring) {
  98         default:
  99                 DRM_ERROR("unknown ring id: %d\n", ring);
 100                 return -EINVAL;
 101         case RADEON_CS_RING_GFX:
 102                 p->ring = RADEON_RING_TYPE_GFX_INDEX;
 103                 break;
 104         case RADEON_CS_RING_COMPUTE:
 105                 /* for now */
 106                 p->ring = RADEON_RING_TYPE_GFX_INDEX;
 107                 break;
 108         }
 109         return 0;
 110 }
 111
 112 int radeon_cs_parser_init(struct radeon_cs_parser *p, void *data)
 113 {
 114         struct drm_radeon_cs *cs = data;
 115         uint64_t *chunk_array_ptr;
 116         unsigned size, i;
 117         u32 ring = RADEON_CS_RING_GFX;
 118         s32 priority = 0;
 119
 120         if (!cs->num_chunks) {
 121                 return 0;
 122         }
 123         /* get chunks */
 124         INIT_LIST_HEAD(&p->validated);
 125         p->idx = 0;
 126         p->chunk_ib_idx = -1;
 127         p->chunk_relocs_idx = -1;
 128         p->chunk_flags_idx = -1;
 129         p->chunks_array = kcalloc(cs->num_chunks, sizeof(uint64_t), GFP_KERNEL);
 130         if (p->chunks_array == NULL) {
 131                 return -ENOMEM;
 132         }
 133         chunk_array_ptr = (uint64_t *)(unsigned long)(cs->chunks);
 134         if (DRM_COPY_FROM_USER(p->chunks_array, chunk_array_ptr,
 135                                sizeof(uint64_t)*cs->num_chunks)) {
 136                 return -EFAULT;
 137         }
 138         p->cs_flags = 0;
 139         p->nchunks = cs->num_chunks;
 140         p->chunks = kcalloc(p->nchunks, sizeof(struct radeon_cs_chunk), GFP_KERNEL);
 141         if (p->chunks == NULL) {
 142                 return -ENOMEM;
 143         }
 144         for (i = 0; i < p->nchunks; i++) {
 145                 struct drm_radeon_cs_chunk __user **chunk_ptr = NULL;
 146                 struct drm_radeon_cs_chunk user_chunk;
 147                 uint32_t __user *cdata;
 148
 149                 chunk_ptr = (void __user*)(unsigned long)p->chunks_array[i];
 150                 if (DRM_COPY_FROM_USER(&user_chunk, chunk_ptr,
 151                                        sizeof(struct drm_radeon_cs_chunk))) {
 152                         return -EFAULT;
 153                 }
 154                 p->chunks[i].length_dw = user_chunk.length_dw;
 155                 p->chunks[i].kdata = NULL;
 156                 p->chunks[i].chunk_id = user_chunk.chunk_id;
 157
 158                 if (p->chunks[i].chunk_id == RADEON_CHUNK_ID_RELOCS) {
 159                         p->chunk_relocs_idx = i;
 160                 }
 161                 if (p->chunks[i].chunk_id == RADEON_CHUNK_ID_IB) {
 162                         p->chunk_ib_idx = i;
 163                         /* zero length IB isn't useful */
 164                         if (p->chunks[i].length_dw == 0)
 165                                 return -EINVAL;
 166                 }
 167                 if (p->chunks[i].chunk_id == RADEON_CHUNK_ID_FLAGS) {
 168                         p->chunk_flags_idx = i;
 169                         /* zero length flags aren't useful */
 170                         if (p->chunks[i].length_dw == 0)
 171                                 return -EINVAL;
 172                 }
 173
 174                 p->chunks[i].length_dw = user_chunk.length_dw;
 175                 p->chunks[i].user_ptr = (void __user *)(unsigned long)user_chunk.chunk_data;
 176
 177                 cdata = (uint32_t *)(unsigned long)user_chunk.chunk_data;
 178                 if ((p->chunks[i].chunk_id == RADEON_CHUNK_ID_RELOCS) ||
 179                     (p->chunks[i].chunk_id == RADEON_CHUNK_ID_FLAGS)) {
 180                         size = p->chunks[i].length_dw * sizeof(uint32_t);
 181                         p->chunks[i].kdata = kmalloc(size, GFP_KERNEL);
 182                         if (p->chunks[i].kdata == NULL) {
 183                                 return -ENOMEM;
 184                         }
 185                         if (DRM_COPY_FROM_USER(p->chunks[i].kdata,
 186                                                p->chunks[i].user_ptr, size)) {
 187                                 return -EFAULT;
 188                         }
 189                         if (p->chunks[i].chunk_id == RADEON_CHUNK_ID_FLAGS) {
 190                                 p->cs_flags = p->chunks[i].kdata[0];
 191                                 if (p->chunks[i].length_dw > 1)
 192                                         ring = p->chunks[i].kdata[1];
 193                                 if (p->chunks[i].length_dw > 2)
 194                                         priority = (s32)p->chunks[i].kdata[2];
 195                         }
 196                 }
 197         }
 198
 199         if ((p->cs_flags & RADEON_CS_USE_VM) &&
 200             (p->rdev->family < CHIP_CAYMAN)) {
 201                 DRM_ERROR("VM not supported on asic!\n");
 202                 if (p->chunk_relocs_idx != -1)
 203                         kfree(p->chunks[p->chunk_relocs_idx].kdata);
 204                 if (p->chunk_flags_idx != -1)
 205                         kfree(p->chunks[p->chunk_flags_idx].kdata);
 206                 return -EINVAL;
 207         }
 208
 209         if (radeon_cs_get_ring(p, ring, priority)) {
 210                 if (p->chunk_relocs_idx != -1)
 211                         kfree(p->chunks[p->chunk_relocs_idx].kdata);
 212                 if (p->chunk_flags_idx != -1)
 213                         kfree(p->chunks[p->chunk_flags_idx].kdata);
 214                 return -EINVAL;
 215         }
 216
 217
 218         /* deal with non-vm */
 219         if ((p->chunk_ib_idx != -1) &&
 220             ((p->cs_flags & RADEON_CS_USE_VM) == 0) &&
 221             (p->chunks[p->chunk_ib_idx].chunk_id == RADEON_CHUNK_ID_IB)) {
 222                 if (p->chunks[p->chunk_ib_idx].length_dw > (16 * 1024)) {
 223                         DRM_ERROR("cs IB too big: %d\n",
 224                                   p->chunks[p->chunk_ib_idx].length_dw);
 225                         return -EINVAL;
 226                 }
 227                 p->chunks[p->chunk_ib_idx].kpage[0] = kmalloc(PAGE_SIZE, GFP_KERNEL);
 228                 p->chunks[p->chunk_ib_idx].kpage[1] = kmalloc(PAGE_SIZE, GFP_KERNEL);
 229                 if (p->chunks[p->chunk_ib_idx].kpage[0] == NULL ||
 230                     p->chunks[p->chunk_ib_idx].kpage[1] == NULL) {
 231                         kfree(p->chunks[p->chunk_ib_idx].kpage[0]);
 232                         kfree(p->chunks[p->chunk_ib_idx].kpage[1]);
 233                         return -ENOMEM;
 234                 }
 235                 p->chunks[p->chunk_ib_idx].kpage_idx[0] = -1;
 236                 p->chunks[p->chunk_ib_idx].kpage_idx[1] = -1;
 237                 p->chunks[p->chunk_ib_idx].last_copied_page = -1;
 238                 p->chunks[p->chunk_ib_idx].last_page_index =
 239                         ((p->chunks[p->chunk_ib_idx].length_dw * 4) - 1) / PAGE_SIZE;
 240         }
 241
 242         return 0;
 243 }
 244
 245 /**
 246  * cs_parser_fini() - clean parser states
 247  * @parser:     parser structure holding parsing context.
 248  * @error:      error number
 249  *
 250  * If error is set than unvalidate buffer, otherwise just free memory
 251  * used by parsing context.
 252  **/
 253 static void radeon_cs_parser_fini(struct radeon_cs_parser *parser, int error)
 254 {
 255         unsigned i;
 256
 257
 258         if (!error && parser->ib)
 259                 ttm_eu_fence_buffer_objects(&parser->validated,
 260                                             parser->ib->fence);
 261         else
 262                 ttm_eu_backoff_reservation(&parser->validated);
 263
 264         if (parser->relocs != NULL) {
 265                 for (i = 0; i < parser->nrelocs; i++) {
 266                         if (parser->relocs[i].gobj)
 267                                 drm_gem_object_unreference_unlocked(parser->relocs[i].gobj);
 268                 }
 269         }
 270         kfree(parser->track);
 271         kfree(parser->relocs);
 272         kfree(parser->relocs_ptr);
 273         for (i = 0; i < parser->nchunks; i++) {
 274                 kfree(parser->chunks[i].kdata);
 275                 kfree(parser->chunks[i].kpage[0]);
 276                 kfree(parser->chunks[i].kpage[1]);
 277         }
 278         kfree(parser->chunks);
 279         kfree(parser->chunks_array);
 280         radeon_ib_free(parser->rdev, &parser->ib);
 281 }
 282
 283 static int radeon_cs_ib_chunk(struct radeon_device *rdev,
 284                               struct radeon_cs_parser *parser)
 285 {
 286         struct radeon_cs_chunk *ib_chunk;
 287         int r;
 288
 289         if (parser->chunk_ib_idx == -1)
 290                 return 0;
 291
 292         if (parser->cs_flags & RADEON_CS_USE_VM)
 293                 return 0;
 294
 295         ib_chunk = &parser->chunks[parser->chunk_ib_idx];
 296         /* Copy the packet into the IB, the parser will read from the
 297          * input memory (cached) and write to the IB (which can be
 298          * uncached).
 299          */
 300         r =  radeon_ib_get(rdev, parser->ring, &parser->ib,
 301                            ib_chunk->length_dw * 4);
 302         if (r) {
 303                 DRM_ERROR("Failed to get ib !\n");
 304                 return r;
 305         }
 306         parser->ib->length_dw = ib_chunk->length_dw;
 307         r = radeon_cs_parse(parser);
 308         if (r || parser->parser_error) {
 309                 DRM_ERROR("Invalid command stream !\n");
 310                 return r;
 311         }
 312         r = radeon_cs_finish_pages(parser);
 313         if (r) {
 314                 DRM_ERROR("Invalid command stream !\n");
 315                 return r;
 316         }
 317         parser->ib->vm_id = 0;
 318         r = radeon_ib_schedule(rdev, parser->ib);
 319         if (r) {
 320                 DRM_ERROR("Failed to schedule IB !\n");
 321         }
 322         return 0;
 323 }
 324
 325 static int radeon_bo_vm_update_pte(struct radeon_cs_parser *parser,
 326                                    struct radeon_vm *vm)
 327 {
 328         struct radeon_bo_list *lobj;
 329         struct radeon_bo *bo;
 330         int r;
 331
 332         list_for_each_entry(lobj, &parser->validated, tv.head) {
 333                 bo = lobj->bo;
 334                 r = radeon_vm_bo_update_pte(parser->rdev, vm, bo, &bo->tbo.mem);
 335                 if (r) {
 336                         return r;
 337                 }
 338         }
 339         return 0;
 340 }
 341
 342 static int radeon_cs_ib_vm_chunk(struct radeon_device *rdev,
 343                                  struct radeon_cs_parser *parser)
 344 {
 345         struct radeon_cs_chunk *ib_chunk;
 346         struct radeon_fpriv *fpriv = parser->filp->driver_priv;
 347         struct radeon_vm *vm = &fpriv->vm;
 348         int r;
 349
 350         if (parser->chunk_ib_idx == -1)
 351                 return 0;
 352
 353         if ((parser->cs_flags & RADEON_CS_USE_VM) == 0)
 354                 return 0;
 355
 356         ib_chunk = &parser->chunks[parser->chunk_ib_idx];
 357         if (ib_chunk->length_dw > RADEON_IB_VM_MAX_SIZE) {
 358                 DRM_ERROR("cs IB too big: %d\n", ib_chunk->length_dw);
 359                 return -EINVAL;
 360         }
 361         r =  radeon_ib_get(rdev, parser->ring, &parser->ib,
 362                            ib_chunk->length_dw * 4);
 363         if (r) {
 364                 DRM_ERROR("Failed to get ib !\n");
 365                 return r;
 366         }
 367         parser->ib->length_dw = ib_chunk->length_dw;
 368         /* Copy the packet into the IB */
 369         if (DRM_COPY_FROM_USER(parser->ib->ptr, ib_chunk->user_ptr,
 370                                ib_chunk->length_dw * 4)) {
 371                 return -EFAULT;
 372         }
 373         r = radeon_ring_ib_parse(rdev, parser->ring, parser->ib);
 374         if (r) {
 375                 return r;
 376         }
 377
 378         mutex_lock(&vm->mutex);
 379         r = radeon_vm_bind(rdev, vm);
 380         if (r) {
 381                 goto out;
 382         }
 383         r = radeon_bo_vm_update_pte(parser, vm);
 384         if (r) {
 385                 goto out;
 386         }
 387         parser->ib->vm_id = vm->id;
 388         /* ib pool is bind at 0 in virtual address space to gpu_addr is the
 389          * offset inside the pool bo
 390          */
 391         parser->ib->gpu_addr = parser->ib->sa_bo.offset;
 392         r = radeon_ib_schedule(rdev, parser->ib);
 393 out:
 394         if (!r) {
 395                 if (vm->fence) {
 396                         radeon_fence_unref(&vm->fence);
 397                 }
 398                 vm->fence = radeon_fence_ref(parser->ib->fence);
 399         }
 400         mutex_unlock(&fpriv->vm.mutex);
 401         return r;
 402 }
 403
 404 int radeon_cs_ioctl(struct drm_device *dev, void *data, struct drm_file *filp)
 405 {
 406         struct radeon_device *rdev = dev->dev_private;
 407         struct radeon_cs_parser parser;
 408         int r;
 409
 410         radeon_mutex_lock(&rdev->cs_mutex);
 411         /* initialize parser */
 412         memset(&parser, 0, sizeof(struct radeon_cs_parser));
 413         parser.filp = filp;
 414         parser.rdev = rdev;
 415         parser.dev = rdev->dev;
 416         parser.family = rdev->family;
 417         r = radeon_cs_parser_init(&parser, data);
 418         if (r) {
 419                 DRM_ERROR("Failed to initialize parser !\n");
 420                 radeon_cs_parser_fini(&parser, r);
 421                 radeon_mutex_unlock(&rdev->cs_mutex);
 422                 return r;
 423         }
 424         r = radeon_cs_parser_relocs(&parser);
 425         if (r) {
 426                 if (r != -ERESTARTSYS)
 427                         DRM_ERROR("Failed to parse relocation %d!\n", r);
 428                 radeon_cs_parser_fini(&parser, r);
 429                 radeon_mutex_unlock(&rdev->cs_mutex);
 430                 return r;
 431         }
 432         r = radeon_cs_ib_chunk(rdev, &parser);
 433         if (r) {
 434                 goto out;
 435         }
 436         r = radeon_cs_ib_vm_chunk(rdev, &parser);
 437         if (r) {
 438                 goto out;
 439         }
 440 out:
 441         radeon_cs_parser_fini(&parser, r);
 442         radeon_mutex_unlock(&rdev->cs_mutex);
 443         return r;
 444 }
 445
 446 int radeon_cs_finish_pages(struct radeon_cs_parser *p)
 447 {
 448         struct radeon_cs_chunk *ibc = &p->chunks[p->chunk_ib_idx];
 449         int i;
 450         int size = PAGE_SIZE;
 451
 452         for (i = ibc->last_copied_page + 1; i <= ibc->last_page_index; i++) {
 453                 if (i == ibc->last_page_index) {
 454                         size = (ibc->length_dw * 4) % PAGE_SIZE;
 455                         if (size == 0)
 456                                 size = PAGE_SIZE;
 457                 }
 458
 459                 if (DRM_COPY_FROM_USER(p->ib->ptr + (i * (PAGE_SIZE/4)),
 460                                        ibc->user_ptr + (i * PAGE_SIZE),
 461                                        size))
 462                         return -EFAULT;
 463         }
 464         return 0;
 465 }
 466
 467 int radeon_cs_update_pages(struct radeon_cs_parser *p, int pg_idx)
 468 {
 469         int new_page;
 470         struct radeon_cs_chunk *ibc = &p->chunks[p->chunk_ib_idx];
 471         int i;
 472         int size = PAGE_SIZE;
 473
 474         for (i = ibc->last_copied_page + 1; i < pg_idx; i++) {
 475                 if (DRM_COPY_FROM_USER(p->ib->ptr + (i * (PAGE_SIZE/4)),
 476                                        ibc->user_ptr + (i * PAGE_SIZE),
 477                                        PAGE_SIZE)) {
 478                         p->parser_error = -EFAULT;
 479                         return 0;
 480                 }
 481         }
 482
 483         new_page = ibc->kpage_idx[0] < ibc->kpage_idx[1] ? 0 : 1;
 484
 485         if (pg_idx == ibc->last_page_index) {
 486                 size = (ibc->length_dw * 4) % PAGE_SIZE;
 487                         if (size == 0)
 488                                 size = PAGE_SIZE;
 489         }
 490
 491         if (DRM_COPY_FROM_USER(ibc->kpage[new_page],
 492                                ibc->user_ptr + (pg_idx * PAGE_SIZE),
 493                                size)) {
 494                 p->parser_error = -EFAULT;
 495                 return 0;
 496         }
 497
 498         /* copy to IB here */
 499         memcpy((void *)(p->ib->ptr+(pg_idx*(PAGE_SIZE/4))), ibc->kpage[new_page], size);
 500
 501         ibc->last_copied_page = pg_idx;
 502         ibc->kpage_idx[new_page] = pg_idx;
 503
 504         return new_page;
 505 }