src/gallium/drivers/vc4/vc4_bufmgr.c

   1 /*
   2  * Copyright © 2014 Broadcom
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  21  * IN THE SOFTWARE.
  22  */
  23
  24 #include <errno.h>
  25 #include <err.h>
  26 #include <sys/mman.h>
  27 #include <fcntl.h>
  28 #include <xf86drm.h>
  29 #include <xf86drmMode.h>
  30
  31 #include "util/u_memory.h"
  32 #include "util/ralloc.h"
  33
  34 #include "vc4_context.h"
  35 #include "vc4_screen.h"
  36
  37 static bool dump_stats = false;
  38
  39 static void
  40 vc4_bo_dump_stats(struct vc4_screen *screen)
  41 {
  42         struct vc4_bo_cache *cache = &screen->bo_cache;
  43
  44         fprintf(stderr, "  BOs allocated:   %d\n", screen->bo_count);
  45         fprintf(stderr, "  BOs size:        %dkb\n", screen->bo_size / 102);
  46         fprintf(stderr, "  BOs cached:      %d\n", cache->bo_count);
  47         fprintf(stderr, "  BOs cached size: %dkb\n", cache->bo_size / 102);
  48
  49         if (!list_empty(&cache->time_list)) {
  50                 struct vc4_bo *first = LIST_ENTRY(struct vc4_bo,
  51                                                   cache->time_list.next,
  52                                                   time_list);
  53                 struct vc4_bo *last = LIST_ENTRY(struct vc4_bo,
  54                                                   cache->time_list.prev,
  55                                                   time_list);
  56
  57                 fprintf(stderr, "  oldest cache time: %ld\n",
  58                         (long)first->free_time);
  59                 fprintf(stderr, "  newest cache time: %ld\n",
  60                         (long)last->free_time);
  61
  62                 struct timespec time;
  63                 clock_gettime(CLOCK_MONOTONIC, &time);
  64                 fprintf(stderr, "  now:               %ld\n",
  65                         time.tv_sec);
  66         }
  67 }
  68
  69 static void
  70 vc4_bo_remove_from_cache(struct vc4_bo_cache *cache, struct vc4_bo *bo)
  71 {
  72         list_del(&bo->time_list);
  73         list_del(&bo->size_list);
  74         cache->bo_count--;
  75         cache->bo_size -= bo->size;
  76 }
  77
  78 static struct vc4_bo *
  79 vc4_bo_from_cache(struct vc4_screen *screen, uint32_t size, const char *name)
  80 {
  81         struct vc4_bo_cache *cache = &screen->bo_cache;
  82         uint32_t page_index = size / 4096 - 1;
  83
  84         if (cache->size_list_size <= page_index)
  85                 return NULL;
  86
  87         struct vc4_bo *bo = NULL;
  88         pipe_mutex_lock(cache->lock);
  89         if (!list_empty(&cache->size_list[page_index])) {
  90                 bo = LIST_ENTRY(struct vc4_bo, cache->size_list[page_index].next,
  91                                 size_list);
  92
  93                 /* Check that the BO has gone idle.  If not, then we want to
  94                  * allocate something new instead, since we assume that the
  95                  * user will proceed to CPU map it and fill it with stuff.
  96                  */
  97                 if (!vc4_bo_wait(bo, 0, NULL)) {
  98                         pipe_mutex_unlock(cache->lock);
  99                         return NULL;
 100                 }
 101
 102                 pipe_reference_init(&bo->reference, 1);
 103                 vc4_bo_remove_from_cache(cache, bo);
 104
 105                 bo->name = name;
 106         }
 107         pipe_mutex_unlock(cache->lock);
 108         return bo;
 109 }
 110
 111 struct vc4_bo *
 112 vc4_bo_alloc(struct vc4_screen *screen, uint32_t size, const char *name)
 113 {
 114         struct vc4_bo *bo;
 115         int ret;
 116
 117         size = align(size, 4096);
 118
 119         bo = vc4_bo_from_cache(screen, size, name);
 120         if (bo) {
 121                 if (dump_stats) {
 122                         fprintf(stderr, "Allocated %s %dkb from cache:\n",
 123                                 name, size / 1024);
 124                         vc4_bo_dump_stats(screen);
 125                 }
 126                 return bo;
 127         }
 128
 129         bo = CALLOC_STRUCT(vc4_bo);
 130         if (!bo)
 131                 return NULL;
 132
 133         pipe_reference_init(&bo->reference, 1);
 134         bo->screen = screen;
 135         bo->size = size;
 136         bo->name = name;
 137         bo->private = true;
 138
 139         if (!using_vc4_simulator) {
 140                 struct drm_vc4_create_bo create;
 141                 memset(&create, 0, sizeof(create));
 142
 143                 create.size = size;
 144
 145                 ret = drmIoctl(screen->fd, DRM_IOCTL_VC4_CREATE_BO, &create);
 146                 bo->handle = create.handle;
 147         } else {
 148                 struct drm_mode_create_dumb create;
 149                 memset(&create, 0, sizeof(create));
 150
 151                 create.width = 128;
 152                 create.bpp = 8;
 153                 create.height = (size + 127) / 128;
 154
 155                 ret = drmIoctl(screen->fd, DRM_IOCTL_MODE_CREATE_DUMB, &create);
 156                 bo->handle = create.handle;
 157                 assert(create.size >= size);
 158         }
 159         if (ret != 0) {
 160                 fprintf(stderr, "create ioctl failure\n");
 161                 abort();
 162         }
 163
 164         screen->bo_count++;
 165         screen->bo_size += bo->size;
 166         if (dump_stats) {
 167                 fprintf(stderr, "Allocated %s %dkb:\n", name, size / 1024);
 168                 vc4_bo_dump_stats(screen);
 169         }
 170
 171         return bo;
 172 }
 173
 174 void
 175 vc4_bo_last_unreference(struct vc4_bo *bo)
 176 {
 177         struct vc4_screen *screen = bo->screen;
 178
 179         struct timespec time;
 180         clock_gettime(CLOCK_MONOTONIC, &time);
 181         pipe_mutex_lock(screen->bo_cache.lock);
 182         vc4_bo_last_unreference_locked_timed(bo, time.tv_sec);
 183         pipe_mutex_unlock(screen->bo_cache.lock);
 184 }
 185
 186 static void
 187 vc4_bo_free(struct vc4_bo *bo)
 188 {
 189         struct vc4_screen *screen = bo->screen;
 190
 191         if (bo->map) {
 192 #ifdef USE_VC4_SIMULATOR
 193                 if (bo->simulator_winsys_map) {
 194                         free(bo->map);
 195                         bo->map = bo->simulator_winsys_map;
 196                 }
 197 #endif
 198                 munmap(bo->map, bo->size);
 199         }
 200
 201         struct drm_gem_close c;
 202         memset(&c, 0, sizeof(c));
 203         c.handle = bo->handle;
 204         int ret = drmIoctl(screen->fd, DRM_IOCTL_GEM_CLOSE, &c);
 205         if (ret != 0)
 206                 fprintf(stderr, "close object %d: %s\n", bo->handle, strerror(errno));
 207
 208         screen->bo_count--;
 209         screen->bo_size -= bo->size;
 210
 211         if (dump_stats) {
 212                 fprintf(stderr, "Freed %s%s%dkb:\n",
 213                         bo->name ? bo->name : "",
 214                         bo->name ? " " : "",
 215                         bo->size / 1024);
 216                 vc4_bo_dump_stats(screen);
 217         }
 218
 219         free(bo);
 220 }
 221
 222 static void
 223 free_stale_bos(struct vc4_screen *screen, time_t time)
 224 {
 225         struct vc4_bo_cache *cache = &screen->bo_cache;
 226         bool freed_any = false;
 227
 228         list_for_each_entry_safe(struct vc4_bo, bo, &cache->time_list,
 229                                  time_list) {
 230                 if (dump_stats && !freed_any) {
 231                         fprintf(stderr, "Freeing stale BOs:\n");
 232                         vc4_bo_dump_stats(screen);
 233                         freed_any = true;
 234                 }
 235
 236                 /* If it's more than a second old, free it. */
 237                 if (time - bo->free_time > 2) {
 238                         vc4_bo_remove_from_cache(cache, bo);
 239                         vc4_bo_free(bo);
 240                 } else {
 241                         break;
 242                 }
 243         }
 244
 245         if (dump_stats && freed_any) {
 246                 fprintf(stderr, "Freed stale BOs:\n");
 247                 vc4_bo_dump_stats(screen);
 248         }
 249 }
 250
 251 void
 252 vc4_bo_last_unreference_locked_timed(struct vc4_bo *bo, time_t time)
 253 {
 254         struct vc4_screen *screen = bo->screen;
 255         struct vc4_bo_cache *cache = &screen->bo_cache;
 256         uint32_t page_index = bo->size / 4096 - 1;
 257
 258         if (!bo->private) {
 259                 vc4_bo_free(bo);
 260                 return;
 261         }
 262
 263         if (cache->size_list_size <= page_index) {
 264                 struct list_head *new_list =
 265                         ralloc_array(screen, struct list_head, page_index + 1);
 266
 267                 /* Move old list contents over (since the array has moved, and
 268                  * therefore the pointers to the list heads have to change).
 269                  */
 270                 for (int i = 0; i < cache->size_list_size; i++) {
 271                         struct list_head *old_head = &cache->size_list[i];
 272                         if (list_empty(old_head))
 273                                 list_inithead(&new_list[i]);
 274                         else {
 275                                 new_list[i].next = old_head->next;
 276                                 new_list[i].prev = old_head->prev;
 277                                 new_list[i].next->prev = &new_list[i];
 278                                 new_list[i].prev->next = &new_list[i];
 279                         }
 280                 }
 281                 for (int i = cache->size_list_size; i < page_index + 1; i++)
 282                         list_inithead(&new_list[i]);
 283
 284                 cache->size_list = new_list;
 285                 cache->size_list_size = page_index + 1;
 286         }
 287
 288         bo->free_time = time;
 289         list_addtail(&bo->size_list, &cache->size_list[page_index]);
 290         list_addtail(&bo->time_list, &cache->time_list);
 291         cache->bo_count++;
 292         cache->bo_size += bo->size;
 293         if (dump_stats) {
 294                 fprintf(stderr, "Freed %s %dkb to cache:\n",
 295                         bo->name, bo->size / 1024);
 296                 vc4_bo_dump_stats(screen);
 297         }
 298         bo->name = NULL;
 299
 300         free_stale_bos(screen, time);
 301 }
 302
 303 static struct vc4_bo *
 304 vc4_bo_open_handle(struct vc4_screen *screen,
 305                    uint32_t winsys_stride,
 306                    uint32_t handle, uint32_t size)
 307 {
 308         struct vc4_bo *bo = CALLOC_STRUCT(vc4_bo);
 309
 310         assert(size);
 311
 312         pipe_reference_init(&bo->reference, 1);
 313         bo->screen = screen;
 314         bo->handle = handle;
 315         bo->size = size;
 316         bo->name = "winsys";
 317         bo->private = false;
 318
 319 #ifdef USE_VC4_SIMULATOR
 320         vc4_bo_map(bo);
 321         bo->simulator_winsys_map = bo->map;
 322         bo->simulator_winsys_stride = winsys_stride;
 323         bo->map = malloc(bo->size);
 324 #endif
 325
 326         return bo;
 327 }
 328
 329 struct vc4_bo *
 330 vc4_bo_open_name(struct vc4_screen *screen, uint32_t name,
 331                  uint32_t winsys_stride)
 332 {
 333         struct drm_gem_open o = {
 334                 .name = name
 335         };
 336         int ret = drmIoctl(screen->fd, DRM_IOCTL_GEM_OPEN, &o);
 337         if (ret) {
 338                 fprintf(stderr, "Failed to open bo %d: %s\n",
 339                         name, strerror(errno));
 340                 return NULL;
 341         }
 342
 343         return vc4_bo_open_handle(screen, winsys_stride, o.handle, o.size);
 344 }
 345
 346 struct vc4_bo *
 347 vc4_bo_open_dmabuf(struct vc4_screen *screen, int fd, uint32_t winsys_stride)
 348 {
 349         uint32_t handle;
 350         int ret = drmPrimeFDToHandle(screen->fd, fd, &handle);
 351         int size;
 352         if (ret) {
 353                 fprintf(stderr, "Failed to get vc4 handle for dmabuf %d\n", fd);
 354                 return NULL;
 355         }
 356
 357         /* Determine the size of the bo we were handed. */
 358         size = lseek(fd, 0, SEEK_END);
 359         if (size == -1) {
 360                 fprintf(stderr, "Couldn't get size of dmabuf fd %d.\n", fd);
 361                 return NULL;
 362         }
 363
 364         return vc4_bo_open_handle(screen, winsys_stride, handle, size);
 365 }
 366
 367 int
 368 vc4_bo_get_dmabuf(struct vc4_bo *bo)
 369 {
 370         int fd;
 371         int ret = drmPrimeHandleToFD(bo->screen->fd, bo->handle,
 372                                      O_CLOEXEC, &fd);
 373         if (ret != 0) {
 374                 fprintf(stderr, "Failed to export gem bo %d to dmabuf\n",
 375                         bo->handle);
 376                 return -1;
 377         }
 378         bo->private = false;
 379
 380         return fd;
 381 }
 382
 383 struct vc4_bo *
 384 vc4_bo_alloc_mem(struct vc4_screen *screen, const void *data, uint32_t size,
 385                  const char *name)
 386 {
 387         void *map;
 388         struct vc4_bo *bo;
 389
 390         bo = vc4_bo_alloc(screen, size, name);
 391         map = vc4_bo_map(bo);
 392         memcpy(map, data, size);
 393         return bo;
 394 }
 395
 396 bool
 397 vc4_bo_flink(struct vc4_bo *bo, uint32_t *name)
 398 {
 399         struct drm_gem_flink flink = {
 400                 .handle = bo->handle,
 401         };
 402         int ret = drmIoctl(bo->screen->fd, DRM_IOCTL_GEM_FLINK, &flink);
 403         if (ret) {
 404                 fprintf(stderr, "Failed to flink bo %d: %s\n",
 405                         bo->handle, strerror(errno));
 406                 free(bo);
 407                 return false;
 408         }
 409
 410         bo->private = false;
 411         *name = flink.name;
 412
 413         return true;
 414 }
 415
 416 static int vc4_wait_seqno_ioctl(int fd, uint64_t seqno, uint64_t timeout_ns)
 417 {
 418         if (using_vc4_simulator)
 419                 return 0;
 420
 421         struct drm_vc4_wait_seqno wait = {
 422                 .seqno = seqno,
 423                 .timeout_ns = timeout_ns,
 424         };
 425         int ret = drmIoctl(fd, DRM_IOCTL_VC4_WAIT_SEQNO, &wait);
 426         if (ret == -1)
 427                 return -errno;
 428         else
 429                 return 0;
 430
 431 }
 432
 433 bool
 434 vc4_wait_seqno(struct vc4_screen *screen, uint64_t seqno, uint64_t timeout_ns,
 435                const char *reason)
 436 {
 437         if (screen->finished_seqno >= seqno)
 438                 return true;
 439
 440         if (unlikely(vc4_debug & VC4_DEBUG_PERF) && timeout_ns && reason) {
 441                 if (vc4_wait_seqno_ioctl(screen->fd, seqno, 0) == -ETIME) {
 442                         fprintf(stderr, "Blocking on seqno %lld for %s\n",
 443                                 (long long)seqno, reason);
 444                 }
 445         }
 446
 447         int ret = vc4_wait_seqno_ioctl(screen->fd, seqno, timeout_ns);
 448         if (ret) {
 449                 if (ret != -ETIME) {
 450                         fprintf(stderr, "wait failed: %d\n", ret);
 451                         abort();
 452                 }
 453
 454                 return false;
 455         }
 456
 457         screen->finished_seqno = seqno;
 458         return true;
 459 }
 460
 461 static int vc4_wait_bo_ioctl(int fd, uint32_t handle, uint64_t timeout_ns)
 462 {
 463         if (using_vc4_simulator)
 464                 return 0;
 465
 466         struct drm_vc4_wait_bo wait = {
 467                 .handle = handle,
 468                 .timeout_ns = timeout_ns,
 469         };
 470         int ret = drmIoctl(fd, DRM_IOCTL_VC4_WAIT_BO, &wait);
 471         if (ret == -1)
 472                 return -errno;
 473         else
 474                 return 0;
 475
 476 }
 477
 478 bool
 479 vc4_bo_wait(struct vc4_bo *bo, uint64_t timeout_ns, const char *reason)
 480 {
 481         struct vc4_screen *screen = bo->screen;
 482
 483         if (unlikely(vc4_debug & VC4_DEBUG_PERF) && timeout_ns && reason) {
 484                 if (vc4_wait_bo_ioctl(screen->fd, bo->handle, 0) == -ETIME) {
 485                         fprintf(stderr, "Blocking on %s BO for %s\n",
 486                                 bo->name, reason);
 487                 }
 488         }
 489
 490         int ret = vc4_wait_bo_ioctl(screen->fd, bo->handle, timeout_ns);
 491         if (ret) {
 492                 if (ret != -ETIME) {
 493                         fprintf(stderr, "wait failed: %d\n", ret);
 494                         abort();
 495                 }
 496
 497                 return false;
 498         }
 499
 500         return true;
 501 }
 502
 503 void *
 504 vc4_bo_map_unsynchronized(struct vc4_bo *bo)
 505 {
 506         uint64_t offset;
 507         int ret;
 508
 509         if (bo->map)
 510                 return bo->map;
 511
 512         if (!using_vc4_simulator) {
 513                 struct drm_vc4_mmap_bo map;
 514                 memset(&map, 0, sizeof(map));
 515                 map.handle = bo->handle;
 516                 ret = drmIoctl(bo->screen->fd, DRM_IOCTL_VC4_MMAP_BO, &map);
 517                 offset = map.offset;
 518         } else {
 519                 struct drm_mode_map_dumb map;
 520                 memset(&map, 0, sizeof(map));
 521                 map.handle = bo->handle;
 522                 ret = drmIoctl(bo->screen->fd, DRM_IOCTL_MODE_MAP_DUMB, &map);
 523                 offset = map.offset;
 524         }
 525         if (ret != 0) {
 526                 fprintf(stderr, "map ioctl failure\n");
 527                 abort();
 528         }
 529
 530         bo->map = mmap(NULL, bo->size, PROT_READ | PROT_WRITE, MAP_SHARED,
 531                        bo->screen->fd, offset);
 532         if (bo->map == MAP_FAILED) {
 533                 fprintf(stderr, "mmap of bo %d (offset 0x%016llx, size %d) failed\n",
 534                         bo->handle, (long long)offset, bo->size);
 535                 abort();
 536         }
 537
 538         return bo->map;
 539 }
 540
 541 void *
 542 vc4_bo_map(struct vc4_bo *bo)
 543 {
 544         void *map = vc4_bo_map_unsynchronized(bo);
 545
 546         bool ok = vc4_bo_wait(bo, PIPE_TIMEOUT_INFINITE, "bo map");
 547         if (!ok) {
 548                 fprintf(stderr, "BO wait for map failed\n");
 549                 abort();
 550         }
 551
 552         return map;
 553 }
 554
 555 void
 556 vc4_bufmgr_destroy(struct pipe_screen *pscreen)
 557 {
 558         struct vc4_screen *screen = vc4_screen(pscreen);
 559         struct vc4_bo_cache *cache = &screen->bo_cache;
 560
 561         list_for_each_entry_safe(struct vc4_bo, bo, &cache->time_list,
 562                                  time_list) {
 563                 vc4_bo_remove_from_cache(cache, bo);
 564                 vc4_bo_free(bo);
 565         }
 566
 567         if (dump_stats) {
 568                 fprintf(stderr, "BO stats after screen destroy:\n");
 569                 vc4_bo_dump_stats(screen);
 570         }
 571 }