src/gallium/drivers/vc4/vc4_resource.c

   1 /*
   2  * Copyright © 2014 Broadcom
   3  * Copyright (C) 2012 Rob Clark <robclark@freedesktop.org>
   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  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  21  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  22  * IN THE SOFTWARE.
  23  */
  24
  25 #include "util/u_memory.h"
  26 #include "util/u_format.h"
  27 #include "util/u_inlines.h"
  28 #include "util/u_surface.h"
  29 #include "util/u_upload_mgr.h"
  30
  31 #include "vc4_screen.h"
  32 #include "vc4_context.h"
  33 #include "vc4_resource.h"
  34 #include "vc4_tiling.h"
  35
  36 static bool miptree_debug = false;
  37
  38 static void
  39 vc4_resource_bo_alloc(struct vc4_resource *rsc)
  40 {
  41         struct pipe_resource *prsc = &rsc->base.b;
  42         struct pipe_screen *pscreen = prsc->screen;
  43
  44         if (miptree_debug) {
  45                 fprintf(stderr, "alloc %p: size %d + offset %d -> %d\n",
  46                         rsc,
  47                         rsc->slices[0].size,
  48                         rsc->slices[0].offset,
  49                         rsc->slices[0].offset +
  50                         rsc->slices[0].size +
  51                         rsc->cube_map_stride * (prsc->array_size - 1));
  52         }
  53
  54         vc4_bo_unreference(&rsc->bo);
  55         rsc->bo = vc4_bo_alloc(vc4_screen(pscreen),
  56                                rsc->slices[0].offset +
  57                                rsc->slices[0].size +
  58                                rsc->cube_map_stride * (prsc->array_size - 1),
  59                                "resource");
  60 }
  61
  62 static void
  63 vc4_resource_transfer_unmap(struct pipe_context *pctx,
  64                             struct pipe_transfer *ptrans)
  65 {
  66         struct vc4_context *vc4 = vc4_context(pctx);
  67         struct vc4_transfer *trans = vc4_transfer(ptrans);
  68         struct pipe_resource *prsc = ptrans->resource;
  69         struct vc4_resource *rsc = vc4_resource(prsc);
  70         struct vc4_resource_slice *slice = &rsc->slices[ptrans->level];
  71
  72         if (trans->map) {
  73                 if (ptrans->usage & PIPE_TRANSFER_WRITE) {
  74                         vc4_store_tiled_image(rsc->bo->map + slice->offset +
  75                                               ptrans->box.z * rsc->cube_map_stride,
  76                                               slice->stride,
  77                                               trans->map, ptrans->stride,
  78                                               slice->tiling, rsc->cpp,
  79                                               &ptrans->box);
  80                 }
  81                 free(trans->map);
  82         }
  83
  84         pipe_resource_reference(&ptrans->resource, NULL);
  85         util_slab_free(&vc4->transfer_pool, ptrans);
  86 }
  87
  88 static void *
  89 vc4_resource_transfer_map(struct pipe_context *pctx,
  90                           struct pipe_resource *prsc,
  91                           unsigned level, unsigned usage,
  92                           const struct pipe_box *box,
  93                           struct pipe_transfer **pptrans)
  94 {
  95         struct vc4_context *vc4 = vc4_context(pctx);
  96         struct vc4_resource *rsc = vc4_resource(prsc);
  97         struct vc4_resource_slice *slice = &rsc->slices[level];
  98         struct vc4_transfer *trans;
  99         struct pipe_transfer *ptrans;
 100         enum pipe_format format = prsc->format;
 101         char *buf;
 102
 103         if (usage & PIPE_TRANSFER_DISCARD_WHOLE_RESOURCE) {
 104                 vc4_resource_bo_alloc(rsc);
 105         } else if (!(usage & PIPE_TRANSFER_UNSYNCHRONIZED)) {
 106                 if (vc4_cl_references_bo(pctx, rsc->bo)) {
 107                         if ((usage & PIPE_TRANSFER_DISCARD_RANGE) &&
 108                             prsc->last_level == 0 &&
 109                             prsc->width0 == box->width &&
 110                             prsc->height0 == box->height &&
 111                             prsc->depth0 == box->depth) {
 112                                 vc4_resource_bo_alloc(rsc);
 113                         } else {
 114                                 vc4_flush(pctx);
 115                         }
 116                 }
 117         }
 118
 119         if (usage & PIPE_TRANSFER_WRITE)
 120                 rsc->writes++;
 121
 122         trans = util_slab_alloc(&vc4->transfer_pool);
 123         if (!trans)
 124                 return NULL;
 125
 126         /* XXX: Handle DONTBLOCK, DISCARD_RANGE, PERSISTENT, COHERENT. */
 127
 128         /* util_slab_alloc() doesn't zero: */
 129         memset(trans, 0, sizeof(*trans));
 130         ptrans = &trans->base;
 131
 132         pipe_resource_reference(&ptrans->resource, prsc);
 133         ptrans->level = level;
 134         ptrans->usage = usage;
 135         ptrans->box = *box;
 136
 137         /* Note that the current kernel implementation is synchronous, so no
 138          * need to do syncing stuff here yet.
 139          */
 140
 141         if (usage & PIPE_TRANSFER_UNSYNCHRONIZED)
 142                 buf = vc4_bo_map_unsynchronized(rsc->bo);
 143         else
 144                 buf = vc4_bo_map(rsc->bo);
 145         if (!buf) {
 146                 fprintf(stderr, "Failed to map bo\n");
 147                 goto fail;
 148         }
 149
 150         *pptrans = ptrans;
 151
 152         if (rsc->tiled) {
 153                 uint32_t utile_w = vc4_utile_width(rsc->cpp);
 154                 uint32_t utile_h = vc4_utile_height(rsc->cpp);
 155
 156                 /* No direct mappings of tiled, since we need to manually
 157                  * tile/untile.
 158                  */
 159                 if (usage & PIPE_TRANSFER_MAP_DIRECTLY)
 160                         return NULL;
 161
 162                 /* We need to align the box to utile boundaries, since that's
 163                  * what load/store operate on.
 164                  */
 165                 uint32_t box_start_x = ptrans->box.x & (utile_w - 1);
 166                 uint32_t box_start_y = ptrans->box.y & (utile_h - 1);
 167                 ptrans->box.width += box_start_x;
 168                 ptrans->box.x -= box_start_x;
 169                 ptrans->box.height += box_start_y;
 170                 ptrans->box.y -= box_start_y;
 171                 ptrans->box.width = align(ptrans->box.width, utile_w);
 172                 ptrans->box.height = align(ptrans->box.height, utile_h);
 173
 174                 ptrans->stride = ptrans->box.width * rsc->cpp;
 175                 ptrans->layer_stride = ptrans->stride;
 176
 177                 trans->map = malloc(ptrans->stride * ptrans->box.height);
 178                 if (usage & PIPE_TRANSFER_READ) {
 179                         vc4_load_tiled_image(trans->map, ptrans->stride,
 180                                              buf + slice->offset +
 181                                              box->z * rsc->cube_map_stride,
 182                                              slice->stride,
 183                                              slice->tiling, rsc->cpp,
 184                                              &ptrans->box);
 185                 }
 186                 return (trans->map +
 187                         box_start_x * rsc->cpp +
 188                         box_start_y * ptrans->stride);
 189         } else {
 190                 ptrans->stride = slice->stride;
 191                 ptrans->layer_stride = ptrans->stride;
 192
 193                 return buf + slice->offset +
 194                         box->y / util_format_get_blockheight(format) * ptrans->stride +
 195                         box->x / util_format_get_blockwidth(format) * rsc->cpp +
 196                         box->z * rsc->cube_map_stride;
 197         }
 198
 199
 200 fail:
 201         vc4_resource_transfer_unmap(pctx, ptrans);
 202         return NULL;
 203 }
 204
 205 static void
 206 vc4_resource_destroy(struct pipe_screen *pscreen,
 207                      struct pipe_resource *prsc)
 208 {
 209         struct vc4_resource *rsc = vc4_resource(prsc);
 210         pipe_resource_reference(&rsc->shadow_parent, NULL);
 211         vc4_bo_unreference(&rsc->bo);
 212         free(rsc);
 213 }
 214
 215 static boolean
 216 vc4_resource_get_handle(struct pipe_screen *pscreen,
 217                         struct pipe_resource *prsc,
 218                         struct winsys_handle *handle)
 219 {
 220         struct vc4_resource *rsc = vc4_resource(prsc);
 221
 222         return vc4_screen_bo_get_handle(pscreen, rsc->bo, rsc->slices[0].stride,
 223                                         handle);
 224 }
 225
 226 static const struct u_resource_vtbl vc4_resource_vtbl = {
 227         .resource_get_handle      = vc4_resource_get_handle,
 228         .resource_destroy         = vc4_resource_destroy,
 229         .transfer_map             = vc4_resource_transfer_map,
 230         .transfer_flush_region    = u_default_transfer_flush_region,
 231         .transfer_unmap           = vc4_resource_transfer_unmap,
 232         .transfer_inline_write    = u_default_transfer_inline_write,
 233 };
 234
 235 static void
 236 vc4_setup_slices(struct vc4_resource *rsc)
 237 {
 238         struct pipe_resource *prsc = &rsc->base.b;
 239         uint32_t width = prsc->width0;
 240         uint32_t height = prsc->height0;
 241         uint32_t pot_width = util_next_power_of_two(width);
 242         uint32_t pot_height = util_next_power_of_two(height);
 243         uint32_t offset = 0;
 244         uint32_t utile_w = vc4_utile_width(rsc->cpp);
 245         uint32_t utile_h = vc4_utile_height(rsc->cpp);
 246
 247         for (int i = prsc->last_level; i >= 0; i--) {
 248                 struct vc4_resource_slice *slice = &rsc->slices[i];
 249
 250                 uint32_t level_width, level_height;
 251                 if (i == 0) {
 252                         level_width = width;
 253                         level_height = height;
 254                 } else {
 255                         level_width = u_minify(pot_width, i);
 256                         level_height = u_minify(pot_height, i);
 257                 }
 258
 259                 if (!rsc->tiled) {
 260                         slice->tiling = VC4_TILING_FORMAT_LINEAR;
 261                         level_width = align(level_width, utile_w);
 262                 } else {
 263                         if (vc4_size_is_lt(level_width, level_height,
 264                                            rsc->cpp)) {
 265                                 slice->tiling = VC4_TILING_FORMAT_LT;
 266                                 level_width = align(level_width, utile_w);
 267                                 level_height = align(level_height, utile_h);
 268                         } else {
 269                                 slice->tiling = VC4_TILING_FORMAT_T;
 270                                 level_width = align(level_width,
 271                                                     4 * 2 * utile_w);
 272                                 level_height = align(level_height,
 273                                                      4 * 2 * utile_h);
 274                         }
 275                 }
 276
 277                 slice->offset = offset;
 278                 slice->stride = level_width * rsc->cpp;
 279                 slice->size = level_height * slice->stride;
 280
 281                 offset += slice->size;
 282
 283                 if (miptree_debug) {
 284                         static const char tiling_chars[] = {
 285                                 [VC4_TILING_FORMAT_LINEAR] = 'R',
 286                                 [VC4_TILING_FORMAT_LT] = 'L',
 287                                 [VC4_TILING_FORMAT_T] = 'T'
 288                         };
 289                         fprintf(stderr,
 290                                 "rsc setup %p (format %d), %dx%d: "
 291                                 "level %d (%c) -> %dx%d, stride %d@0x%08x\n",
 292                                 rsc, rsc->vc4_format,
 293                                 prsc->width0, prsc->height0,
 294                                 i, tiling_chars[slice->tiling],
 295                                 level_width, level_height,
 296                                 slice->stride, slice->offset);
 297                 }
 298         }
 299
 300         /* The texture base pointer that has to point to level 0 doesn't have
 301          * intra-page bits, so we have to align it, and thus shift up all the
 302          * smaller slices.
 303          */
 304         uint32_t page_align_offset = (align(rsc->slices[0].offset, 4096) -
 305                                       rsc->slices[0].offset);
 306         if (page_align_offset) {
 307                 for (int i = 0; i <= prsc->last_level; i++)
 308                         rsc->slices[i].offset += page_align_offset;
 309         }
 310
 311         /* Cube map faces appear as whole miptrees at a page-aligned offset
 312          * from the first face's miptree.
 313          */
 314         if (prsc->target == PIPE_TEXTURE_CUBE) {
 315                 rsc->cube_map_stride = align(rsc->slices[0].offset +
 316                                              rsc->slices[0].size, 4096);
 317         }
 318 }
 319
 320 static struct vc4_resource *
 321 vc4_resource_setup(struct pipe_screen *pscreen,
 322                    const struct pipe_resource *tmpl)
 323 {
 324         struct vc4_resource *rsc = CALLOC_STRUCT(vc4_resource);
 325         if (!rsc)
 326                 return NULL;
 327         struct pipe_resource *prsc = &rsc->base.b;
 328
 329         *prsc = *tmpl;
 330
 331         pipe_reference_init(&prsc->reference, 1);
 332         prsc->screen = pscreen;
 333
 334         rsc->base.vtbl = &vc4_resource_vtbl;
 335         rsc->cpp = util_format_get_blocksize(tmpl->format);
 336
 337         assert(rsc->cpp);
 338
 339         return rsc;
 340 }
 341
 342 static enum vc4_texture_data_type
 343 get_resource_texture_format(struct pipe_resource *prsc)
 344 {
 345         struct vc4_resource *rsc = vc4_resource(prsc);
 346         uint8_t format = vc4_get_tex_format(prsc->format);
 347
 348         if (!rsc->tiled) {
 349                 assert(format == VC4_TEXTURE_TYPE_RGBA8888);
 350                 return VC4_TEXTURE_TYPE_RGBA32R;
 351         }
 352
 353         return format;
 354 }
 355
 356 struct pipe_resource *
 357 vc4_resource_create(struct pipe_screen *pscreen,
 358                     const struct pipe_resource *tmpl)
 359 {
 360         struct vc4_resource *rsc = vc4_resource_setup(pscreen, tmpl);
 361         struct pipe_resource *prsc = &rsc->base.b;
 362
 363         /* We have to make shared be untiled, since we don't have any way to
 364          * communicate metadata about tiling currently.
 365          */
 366         if (tmpl->target == PIPE_BUFFER ||
 367             (tmpl->bind & (PIPE_BIND_SCANOUT |
 368                            PIPE_BIND_LINEAR |
 369                            PIPE_BIND_SHARED |
 370                            PIPE_BIND_CURSOR))) {
 371                 rsc->tiled = false;
 372         } else {
 373                 rsc->tiled = true;
 374         }
 375
 376         if (tmpl->target != PIPE_BUFFER)
 377                 rsc->vc4_format = get_resource_texture_format(prsc);
 378
 379         vc4_setup_slices(rsc);
 380         vc4_resource_bo_alloc(rsc);
 381         if (!rsc->bo)
 382                 goto fail;
 383
 384         return prsc;
 385 fail:
 386         vc4_resource_destroy(pscreen, prsc);
 387         return NULL;
 388 }
 389
 390 static struct pipe_resource *
 391 vc4_resource_from_handle(struct pipe_screen *pscreen,
 392                          const struct pipe_resource *tmpl,
 393                          struct winsys_handle *handle)
 394 {
 395         struct vc4_resource *rsc = vc4_resource_setup(pscreen, tmpl);
 396         struct pipe_resource *prsc = &rsc->base.b;
 397         struct vc4_resource_slice *slice = &rsc->slices[0];
 398
 399         if (!rsc)
 400                 return NULL;
 401
 402         rsc->tiled = false;
 403         rsc->bo = vc4_screen_bo_from_handle(pscreen, handle);
 404         if (!rsc->bo)
 405                 goto fail;
 406
 407         if (!using_vc4_simulator)
 408                 slice->stride = handle->stride;
 409         else
 410                 slice->stride = align(prsc->width0 * rsc->cpp, 16);
 411
 412         slice->tiling = VC4_TILING_FORMAT_LINEAR;
 413
 414         rsc->vc4_format = get_resource_texture_format(prsc);
 415
 416         if (miptree_debug) {
 417                 fprintf(stderr,
 418                         "rsc import %p (format %d), %dx%d: "
 419                         "level 0 (R) -> stride %d@0x%08x\n",
 420                         rsc, rsc->vc4_format,
 421                         prsc->width0, prsc->height0,
 422                         slice->stride, slice->offset);
 423         }
 424
 425         return prsc;
 426
 427 fail:
 428         vc4_resource_destroy(pscreen, prsc);
 429         return NULL;
 430 }
 431
 432 static struct pipe_surface *
 433 vc4_create_surface(struct pipe_context *pctx,
 434                    struct pipe_resource *ptex,
 435                    const struct pipe_surface *surf_tmpl)
 436 {
 437         struct vc4_surface *surface = CALLOC_STRUCT(vc4_surface);
 438         struct vc4_resource *rsc = vc4_resource(ptex);
 439
 440         if (!surface)
 441                 return NULL;
 442
 443         assert(surf_tmpl->u.tex.first_layer == surf_tmpl->u.tex.last_layer);
 444
 445         struct pipe_surface *psurf = &surface->base;
 446         unsigned level = surf_tmpl->u.tex.level;
 447
 448         pipe_reference_init(&psurf->reference, 1);
 449         pipe_resource_reference(&psurf->texture, ptex);
 450
 451         psurf->context = pctx;
 452         psurf->format = surf_tmpl->format;
 453         psurf->width = u_minify(ptex->width0, level);
 454         psurf->height = u_minify(ptex->height0, level);
 455         psurf->u.tex.level = level;
 456         psurf->u.tex.first_layer = surf_tmpl->u.tex.first_layer;
 457         psurf->u.tex.last_layer = surf_tmpl->u.tex.last_layer;
 458         surface->offset = rsc->slices[level].offset;
 459         surface->tiling = rsc->slices[level].tiling;
 460
 461         return &surface->base;
 462 }
 463
 464 static void
 465 vc4_surface_destroy(struct pipe_context *pctx, struct pipe_surface *psurf)
 466 {
 467         pipe_resource_reference(&psurf->texture, NULL);
 468         FREE(psurf);
 469 }
 470
 471 /** Debug routine to dump the contents of an 8888 surface to the console */
 472 void
 473 vc4_dump_surface(struct pipe_surface *psurf)
 474 {
 475         if (!psurf)
 476                 return;
 477
 478         struct pipe_resource *prsc = psurf->texture;
 479         struct vc4_resource *rsc = vc4_resource(prsc);
 480         uint32_t *map = vc4_bo_map(rsc->bo);
 481         uint32_t stride = rsc->slices[0].stride / 4;
 482         uint32_t width = psurf->width;
 483         uint32_t height = psurf->height;
 484         uint32_t chunk_w = width / 79;
 485         uint32_t chunk_h = height / 40;
 486         uint32_t found_colors[10];
 487         uint32_t num_found_colors = 0;
 488
 489         if (rsc->vc4_format != VC4_TEXTURE_TYPE_RGBA32R) {
 490                 fprintf(stderr, "%s: Unsupported format %s\n",
 491                         __func__, util_format_short_name(psurf->format));
 492                 return;
 493         }
 494
 495         for (int by = 0; by < height; by += chunk_h) {
 496                 for (int bx = 0; bx < width; bx += chunk_w) {
 497                         int all_found_color = -1; /* nothing found */
 498
 499                         for (int y = by; y < MIN2(height, by + chunk_h); y++) {
 500                                 for (int x = bx; x < MIN2(width, bx + chunk_w); x++) {
 501                                         uint32_t pix = map[y * stride + x];
 502
 503                                         int i;
 504                                         for (i = 0; i < num_found_colors; i++) {
 505                                                 if (pix == found_colors[i])
 506                                                         break;
 507                                         }
 508                                         if (i == num_found_colors &&
 509                                             num_found_colors <
 510                                             ARRAY_SIZE(found_colors)) {
 511                                                 found_colors[num_found_colors++] = pix;
 512                                         }
 513
 514                                         if (i < num_found_colors) {
 515                                                 if (all_found_color == -1)
 516                                                         all_found_color = i;
 517                                                 else if (i != all_found_color)
 518                                                         all_found_color = ARRAY_SIZE(found_colors);
 519                                         }
 520                                 }
 521                         }
 522                         /* If all pixels for this chunk have a consistent
 523                          * value, then print a character for it.  Either a
 524                          * fixed name (particularly common for piglit tests),
 525                          * or a runtime-generated number.
 526                          */
 527                         if (all_found_color >= 0 &&
 528                             all_found_color < ARRAY_SIZE(found_colors)) {
 529                                 static const struct {
 530                                         uint32_t val;
 531                                         const char *c;
 532                                 } named_colors[] = {
 533                                         { 0xff000000, "█" },
 534                                         { 0x00000000, "█" },
 535                                         { 0xffff0000, "r" },
 536                                         { 0xff00ff00, "g" },
 537                                         { 0xff0000ff, "b" },
 538                                         { 0xffffffff, "w" },
 539                                 };
 540                                 int i;
 541                                 for (i = 0; i < ARRAY_SIZE(named_colors); i++) {
 542                                         if (named_colors[i].val ==
 543                                             found_colors[all_found_color]) {
 544                                                 fprintf(stderr, "%s",
 545                                                         named_colors[i].c);
 546                                                 break;
 547                                         }
 548                                 }
 549                                 /* For unnamed colors, print a number and the
 550                                  * numbers will have values printed at the
 551                                  * end.
 552                                  */
 553                                 if (i == ARRAY_SIZE(named_colors)) {
 554                                         fprintf(stderr, "%c",
 555                                                 '0' + all_found_color);
 556                                 }
 557                         } else {
 558                                 /* If there's no consistent color, print this.
 559                                  */
 560                                 fprintf(stderr, ".");
 561                         }
 562                 }
 563                 fprintf(stderr, "\n");
 564         }
 565
 566         for (int i = 0; i < num_found_colors; i++) {
 567                 fprintf(stderr, "color %d: 0x%08x\n", i, found_colors[i]);
 568         }
 569 }
 570
 571 static void
 572 vc4_flush_resource(struct pipe_context *pctx, struct pipe_resource *resource)
 573 {
 574         /* All calls to flush_resource are followed by a flush of the context,
 575          * so there's nothing to do.
 576          */
 577 }
 578
 579 void
 580 vc4_update_shadow_baselevel_texture(struct pipe_context *pctx,
 581                                     struct pipe_sampler_view *view)
 582 {
 583         struct vc4_resource *shadow = vc4_resource(view->texture);
 584         struct vc4_resource *orig = vc4_resource(shadow->shadow_parent);
 585         assert(orig);
 586
 587         if (shadow->writes == orig->writes && orig->bo->private)
 588                 return;
 589
 590         perf_debug("Updating shadow texture due to %s\n",
 591                    view->u.tex.first_level ? "base level" : "raster layout");
 592
 593         for (int i = 0; i <= shadow->base.b.last_level; i++) {
 594                 unsigned width = u_minify(shadow->base.b.width0, i);
 595                 unsigned height = u_minify(shadow->base.b.height0, i);
 596                 struct pipe_blit_info info = {
 597                         .dst = {
 598                                 .resource = &shadow->base.b,
 599                                 .level = i,
 600                                 .box = {
 601                                         .x = 0,
 602                                         .y = 0,
 603                                         .z = 0,
 604                                         .width = width,
 605                                         .height = height,
 606                                         .depth = 1,
 607                                 },
 608                                 .format = shadow->base.b.format,
 609                         },
 610                         .src = {
 611                                 .resource = &orig->base.b,
 612                                 .level = view->u.tex.first_level + i,
 613                                 .box = {
 614                                         .x = 0,
 615                                         .y = 0,
 616                                         .z = 0,
 617                                         .width = width,
 618                                         .height = height,
 619                                         .depth = 1,
 620                                 },
 621                                 .format = orig->base.b.format,
 622                         },
 623                         .mask = ~0,
 624                 };
 625                 pctx->blit(pctx, &info);
 626         }
 627
 628         shadow->writes = orig->writes;
 629 }
 630
 631 /**
 632  * Converts a 4-byte index buffer to 2 bytes.
 633  *
 634  * Since GLES2 only has support for 1 and 2-byte indices, the hardware doesn't
 635  * include 4-byte index support, and we have to shrink it down.
 636  *
 637  * There's no fallback support for when indices end up being larger than 2^16,
 638  * though it will at least assertion fail.  Also, if the original index data
 639  * was in user memory, it would be nice to not have uploaded it to a VBO
 640  * before translating.
 641  */
 642 struct pipe_resource *
 643 vc4_get_shadow_index_buffer(struct pipe_context *pctx,
 644                             const struct pipe_index_buffer *ib,
 645                             uint32_t count,
 646                             uint32_t *shadow_offset)
 647 {
 648         struct vc4_context *vc4 = vc4_context(pctx);
 649         struct vc4_resource *orig = vc4_resource(ib->buffer);
 650         perf_debug("Fallback conversion for %d uint indices\n", count);
 651
 652         void *data;
 653         struct pipe_resource *shadow_rsc = NULL;
 654         u_upload_alloc(vc4->uploader, 0, count * 2,
 655                        shadow_offset, &shadow_rsc, &data);
 656         uint16_t *dst = data;
 657
 658         struct pipe_transfer *src_transfer;
 659         uint32_t *src = pipe_buffer_map_range(pctx, &orig->base.b,
 660                                               ib->offset,
 661                                               count * 4,
 662                                               PIPE_TRANSFER_READ, &src_transfer);
 663
 664         for (int i = 0; i < count; i++) {
 665                 uint32_t src_index = src[i];
 666                 assert(src_index <= 0xffff);
 667                 dst[i] = src_index;
 668         }
 669
 670         pctx->transfer_unmap(pctx, src_transfer);
 671
 672         return shadow_rsc;
 673 }
 674
 675 void
 676 vc4_resource_screen_init(struct pipe_screen *pscreen)
 677 {
 678         pscreen->resource_create = vc4_resource_create;
 679         pscreen->resource_from_handle = vc4_resource_from_handle;
 680         pscreen->resource_get_handle = u_resource_get_handle_vtbl;
 681         pscreen->resource_destroy = u_resource_destroy_vtbl;
 682 }
 683
 684 void
 685 vc4_resource_context_init(struct pipe_context *pctx)
 686 {
 687         pctx->transfer_map = u_transfer_map_vtbl;
 688         pctx->transfer_flush_region = u_transfer_flush_region_vtbl;
 689         pctx->transfer_unmap = u_transfer_unmap_vtbl;
 690         pctx->transfer_inline_write = u_transfer_inline_write_vtbl;
 691         pctx->create_surface = vc4_create_surface;
 692         pctx->surface_destroy = vc4_surface_destroy;
 693         pctx->resource_copy_region = util_resource_copy_region;
 694         pctx->blit = vc4_blit;
 695         pctx->flush_resource = vc4_flush_resource;
 696 }