src/gallium/drivers/llvmpipe/lp_scene.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2009 VMware, Inc.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 #include "util/u_framebuffer.h"
  29 #include "util/u_math.h"
  30 #include "util/u_memory.h"
  31 #include "util/u_inlines.h"
  32 #include "util/u_simple_list.h"
  33 #include "util/u_format.h"
  34 #include "lp_scene.h"
  35 #include "lp_fence.h"
  36 #include "lp_debug.h"
  37
  38
  39 #define RESOURCE_REF_SZ 32
  40
  41 /** List of resource references */
  42 struct resource_ref {
  43    struct pipe_resource *resource[RESOURCE_REF_SZ];
  44    int count;
  45    struct resource_ref *next;
  46 };
  47
  48
  49 /**
  50  * Create a new scene object.
  51  * \param queue  the queue to put newly rendered/emptied scenes into
  52  */
  53 struct lp_scene *
  54 lp_scene_create( struct pipe_context *pipe )
  55 {
  56    struct lp_scene *scene = CALLOC_STRUCT(lp_scene);
  57    if (!scene)
  58       return NULL;
  59
  60    scene->pipe = pipe;
  61
  62    scene->data.head =
  63       CALLOC_STRUCT(data_block);
  64
  65    pipe_mutex_init(scene->mutex);
  66
  67 #ifdef DEBUG
  68    /* Do some scene limit sanity checks here */
  69    {
  70       size_t maxBins = TILES_X * TILES_Y;
  71       size_t maxCommandBytes = sizeof(struct cmd_block) * maxBins;
  72       size_t maxCommandPlusData = maxCommandBytes + DATA_BLOCK_SIZE;
  73       /* We'll need at least one command block per bin.  Make sure that's
  74        * less than the max allowed scene size.
  75        */
  76       assert(maxCommandBytes < LP_SCENE_MAX_SIZE);
  77       /* We'll also need space for at least one other data block */
  78       assert(maxCommandPlusData <= LP_SCENE_MAX_SIZE);
  79    }
  80 #endif
  81
  82    return scene;
  83 }
  84
  85
  86 /**
  87  * Free all data associated with the given scene, and the scene itself.
  88  */
  89 void
  90 lp_scene_destroy(struct lp_scene *scene)
  91 {
  92    lp_fence_reference(&scene->fence, NULL);
  93    pipe_mutex_destroy(scene->mutex);
  94    assert(scene->data.head->next == NULL);
  95    FREE(scene->data.head);
  96    FREE(scene);
  97 }
  98
  99
 100 /**
 101  * Check if the scene's bins are all empty.
 102  * For debugging purposes.
 103  */
 104 boolean
 105 lp_scene_is_empty(struct lp_scene *scene )
 106 {
 107    unsigned x, y;
 108
 109    for (y = 0; y < TILES_Y; y++) {
 110       for (x = 0; x < TILES_X; x++) {
 111          const struct cmd_bin *bin = lp_scene_get_bin(scene, x, y);
 112          if (bin->head) {
 113             return FALSE;
 114          }
 115       }
 116    }
 117    return TRUE;
 118 }
 119
 120
 121 /* Returns true if there has ever been a failed allocation attempt in
 122  * this scene.  Used in triangle emit to avoid having to check success
 123  * at each bin.
 124  */
 125 boolean
 126 lp_scene_is_oom(struct lp_scene *scene)
 127 {
 128    return scene->alloc_failed;
 129 }
 130
 131
 132 /* Remove all commands from a bin.  Tries to reuse some of the memory
 133  * allocated to the bin, however.
 134  */
 135 void
 136 lp_scene_bin_reset(struct lp_scene *scene, unsigned x, unsigned y)
 137 {
 138    struct cmd_bin *bin = lp_scene_get_bin(scene, x, y);
 139
 140    bin->last_state = NULL;
 141    bin->head = bin->tail;
 142    if (bin->tail) {
 143       bin->tail->next = NULL;
 144       bin->tail->count = 0;
 145    }
 146 }
 147
 148
 149 void
 150 lp_scene_begin_rasterization(struct lp_scene *scene)
 151 {
 152    const struct pipe_framebuffer_state *fb = &scene->fb;
 153    int i;
 154    unsigned max_layer = ~0;
 155
 156    //LP_DBG(DEBUG_RAST, "%s\n", __FUNCTION__);
 157
 158    for (i = 0; i < scene->fb.nr_cbufs; i++) {
 159       struct pipe_surface *cbuf = scene->fb.cbufs[i];
 160       if (llvmpipe_resource_is_texture(cbuf->texture)) {
 161          scene->cbufs[i].stride = llvmpipe_resource_stride(cbuf->texture,
 162                                                            cbuf->u.tex.level);
 163          scene->cbufs[i].layer_stride = llvmpipe_layer_stride(cbuf->texture,
 164                                                               cbuf->u.tex.level);
 165          max_layer = MIN2(max_layer, cbuf->u.tex.last_layer - cbuf->u.tex.first_layer);
 166
 167          scene->cbufs[i].map = llvmpipe_resource_map(cbuf->texture,
 168                                                      cbuf->u.tex.level,
 169                                                      cbuf->u.tex.first_layer,
 170                                                      LP_TEX_USAGE_READ_WRITE);
 171       }
 172       else {
 173          struct llvmpipe_resource *lpr = llvmpipe_resource(cbuf->texture);
 174          unsigned pixstride = util_format_get_blocksize(cbuf->format);
 175          scene->cbufs[i].stride = cbuf->texture->width0;
 176          max_layer = 0;
 177
 178          scene->cbufs[i].map = lpr->data;
 179          scene->cbufs[i].map += cbuf->u.buf.first_element * pixstride;
 180       }
 181    }
 182
 183    if (fb->zsbuf) {
 184       struct pipe_surface *zsbuf = scene->fb.zsbuf;
 185       scene->zsbuf.stride = llvmpipe_resource_stride(zsbuf->texture, zsbuf->u.tex.level);
 186       scene->zsbuf.layer_stride = llvmpipe_layer_stride(zsbuf->texture, zsbuf->u.tex.level);
 187       max_layer = MIN2(max_layer, zsbuf->u.tex.last_layer - zsbuf->u.tex.first_layer);
 188
 189       scene->zsbuf.map = llvmpipe_resource_map(zsbuf->texture,
 190                                                zsbuf->u.tex.level,
 191                                                zsbuf->u.tex.first_layer,
 192                                                LP_TEX_USAGE_READ_WRITE);
 193    }
 194
 195    scene->fb_max_layer = max_layer;
 196 }
 197
 198
 199
 200
 201 /**
 202  * Free all the temporary data in a scene.
 203  */
 204 void
 205 lp_scene_end_rasterization(struct lp_scene *scene )
 206 {
 207    int i, j;
 208
 209    /* Unmap color buffers */
 210    for (i = 0; i < scene->fb.nr_cbufs; i++) {
 211       if (scene->cbufs[i].map) {
 212          struct pipe_surface *cbuf = scene->fb.cbufs[i];
 213          if (llvmpipe_resource_is_texture(cbuf->texture)) {
 214             llvmpipe_resource_unmap(cbuf->texture,
 215                                     cbuf->u.tex.level,
 216                                     cbuf->u.tex.first_layer);
 217          }
 218          scene->cbufs[i].map = NULL;
 219       }
 220    }
 221
 222    /* Unmap z/stencil buffer */
 223    if (scene->zsbuf.map) {
 224       struct pipe_surface *zsbuf = scene->fb.zsbuf;
 225       llvmpipe_resource_unmap(zsbuf->texture,
 226                               zsbuf->u.tex.level,
 227                               zsbuf->u.tex.first_layer);
 228       scene->zsbuf.map = NULL;
 229    }
 230
 231    /* Reset all command lists:
 232     */
 233    for (i = 0; i < scene->tiles_x; i++) {
 234       for (j = 0; j < scene->tiles_y; j++) {
 235          struct cmd_bin *bin = lp_scene_get_bin(scene, i, j);
 236          bin->head = NULL;
 237          bin->tail = NULL;
 238          bin->last_state = NULL;
 239       }
 240    }
 241
 242    /* If there are any bins which weren't cleared by the loop above,
 243     * they will be caught (on debug builds at least) by this assert:
 244     */
 245    assert(lp_scene_is_empty(scene));
 246
 247    /* Decrement texture ref counts
 248     */
 249    {
 250       struct resource_ref *ref;
 251       int i, j = 0;
 252
 253       for (ref = scene->resources; ref; ref = ref->next) {
 254          for (i = 0; i < ref->count; i++) {
 255             if (LP_DEBUG & DEBUG_SETUP)
 256                debug_printf("resource %d: %p %dx%d sz %d\n",
 257                             j,
 258                             (void *) ref->resource[i],
 259                             ref->resource[i]->width0,
 260                             ref->resource[i]->height0,
 261                             llvmpipe_resource_size(ref->resource[i]));
 262             j++;
 263             pipe_resource_reference(&ref->resource[i], NULL);
 264          }
 265       }
 266
 267       if (LP_DEBUG & DEBUG_SETUP)
 268          debug_printf("scene %d resources, sz %d\n",
 269                       j, scene->resource_reference_size);
 270    }
 271
 272    /* Free all scene data blocks:
 273     */
 274    {
 275       struct data_block_list *list = &scene->data;
 276       struct data_block *block, *tmp;
 277
 278       for (block = list->head->next; block; block = tmp) {
 279          tmp = block->next;
 280          FREE(block);
 281       }
 282
 283       list->head->next = NULL;
 284       list->head->used = 0;
 285    }
 286
 287    lp_fence_reference(&scene->fence, NULL);
 288
 289    scene->resources = NULL;
 290    scene->scene_size = 0;
 291    scene->resource_reference_size = 0;
 292
 293    scene->has_depthstencil_clear = FALSE;
 294    scene->alloc_failed = FALSE;
 295
 296    util_unreference_framebuffer_state( &scene->fb );
 297 }
 298
 299
 300
 301
 302
 303
 304 struct cmd_block *
 305 lp_scene_new_cmd_block( struct lp_scene *scene,
 306                         struct cmd_bin *bin )
 307 {
 308    struct cmd_block *block = lp_scene_alloc(scene, sizeof(struct cmd_block));
 309    if (block) {
 310       if (bin->tail) {
 311          bin->tail->next = block;
 312          bin->tail = block;
 313       }
 314       else {
 315          bin->head = block;
 316          bin->tail = block;
 317       }
 318       //memset(block, 0, sizeof *block);
 319       block->next = NULL;
 320       block->count = 0;
 321    }
 322    return block;
 323 }
 324
 325
 326 struct data_block *
 327 lp_scene_new_data_block( struct lp_scene *scene )
 328 {
 329    if (scene->scene_size + DATA_BLOCK_SIZE > LP_SCENE_MAX_SIZE) {
 330       if (0) debug_printf("%s: failed\n", __FUNCTION__);
 331       scene->alloc_failed = TRUE;
 332       return NULL;
 333    }
 334    else {
 335       struct data_block *block = MALLOC_STRUCT(data_block);
 336       if (block == NULL)
 337          return NULL;
 338
 339       scene->scene_size += sizeof *block;
 340
 341       block->used = 0;
 342       block->next = scene->data.head;
 343       scene->data.head = block;
 344
 345       return block;
 346    }
 347 }
 348
 349
 350 /**
 351  * Return number of bytes used for all bin data within a scene.
 352  * This does not include resources (textures) referenced by the scene.
 353  */
 354 static unsigned
 355 lp_scene_data_size( const struct lp_scene *scene )
 356 {
 357    unsigned size = 0;
 358    const struct data_block *block;
 359    for (block = scene->data.head; block; block = block->next) {
 360       size += block->used;
 361    }
 362    return size;
 363 }
 364
 365
 366
 367 /**
 368  * Add a reference to a resource by the scene.
 369  */
 370 boolean
 371 lp_scene_add_resource_reference(struct lp_scene *scene,
 372                                 struct pipe_resource *resource,
 373                                 boolean initializing_scene)
 374 {
 375    struct resource_ref *ref, **last = &scene->resources;
 376    int i;
 377
 378    /* Look at existing resource blocks:
 379     */
 380    for (ref = scene->resources; ref; ref = ref->next) {
 381       last = &ref->next;
 382
 383       /* Search for this resource:
 384        */
 385       for (i = 0; i < ref->count; i++)
 386          if (ref->resource[i] == resource)
 387             return TRUE;
 388
 389       if (ref->count < RESOURCE_REF_SZ) {
 390          /* If the block is half-empty, then append the reference here.
 391           */
 392          break;
 393       }
 394    }
 395
 396    /* Create a new block if no half-empty block was found.
 397     */
 398    if (!ref) {
 399       assert(*last == NULL);
 400       *last = lp_scene_alloc(scene, sizeof *ref);
 401       if (*last == NULL)
 402           return FALSE;
 403
 404       ref = *last;
 405       memset(ref, 0, sizeof *ref);
 406    }
 407
 408    /* Append the reference to the reference block.
 409     */
 410    pipe_resource_reference(&ref->resource[ref->count++], resource);
 411    scene->resource_reference_size += llvmpipe_resource_size(resource);
 412
 413    /* Heuristic to advise scene flushes.  This isn't helpful in the
 414     * initial setup of the scene, but after that point flush on the
 415     * next resource added which exceeds 64MB in referenced texture
 416     * data.
 417     */
 418    if (!initializing_scene &&
 419        scene->resource_reference_size >= LP_SCENE_MAX_RESOURCE_SIZE)
 420       return FALSE;
 421
 422    return TRUE;
 423 }
 424
 425
 426 /**
 427  * Does this scene have a reference to the given resource?
 428  */
 429 boolean
 430 lp_scene_is_resource_referenced(const struct lp_scene *scene,
 431                                 const struct pipe_resource *resource)
 432 {
 433    const struct resource_ref *ref;
 434    int i;
 435
 436    for (ref = scene->resources; ref; ref = ref->next) {
 437       for (i = 0; i < ref->count; i++)
 438          if (ref->resource[i] == resource)
 439             return TRUE;
 440    }
 441
 442    return FALSE;
 443 }
 444
 445
 446
 447
 448 /** advance curr_x,y to the next bin */
 449 static boolean
 450 next_bin(struct lp_scene *scene)
 451 {
 452    scene->curr_x++;
 453    if (scene->curr_x >= scene->tiles_x) {
 454       scene->curr_x = 0;
 455       scene->curr_y++;
 456    }
 457    if (scene->curr_y >= scene->tiles_y) {
 458       /* no more bins */
 459       return FALSE;
 460    }
 461    return TRUE;
 462 }
 463
 464
 465 void
 466 lp_scene_bin_iter_begin( struct lp_scene *scene )
 467 {
 468    scene->curr_x = scene->curr_y = -1;
 469 }
 470
 471
 472 /**
 473  * Return pointer to next bin to be rendered.
 474  * The lp_scene::curr_x and ::curr_y fields will be advanced.
 475  * Multiple rendering threads will call this function to get a chunk
 476  * of work (a bin) to work on.
 477  */
 478 struct cmd_bin *
 479 lp_scene_bin_iter_next( struct lp_scene *scene , int *x, int *y)
 480 {
 481    struct cmd_bin *bin = NULL;
 482
 483    pipe_mutex_lock(scene->mutex);
 484
 485    if (scene->curr_x < 0) {
 486       /* first bin */
 487       scene->curr_x = 0;
 488       scene->curr_y = 0;
 489    }
 490    else if (!next_bin(scene)) {
 491       /* no more bins left */
 492       goto end;
 493    }
 494
 495    bin = lp_scene_get_bin(scene, scene->curr_x, scene->curr_y);
 496    *x = scene->curr_x;
 497    *y = scene->curr_y;
 498
 499 end:
 500    /*printf("return bin %p at %d, %d\n", (void *) bin, *bin_x, *bin_y);*/
 501    pipe_mutex_unlock(scene->mutex);
 502    return bin;
 503 }
 504
 505
 506 void lp_scene_begin_binning( struct lp_scene *scene,
 507                              struct pipe_framebuffer_state *fb, boolean discard )
 508 {
 509    assert(lp_scene_is_empty(scene));
 510
 511    scene->discard = discard;
 512    util_copy_framebuffer_state(&scene->fb, fb);
 513
 514    scene->tiles_x = align(fb->width, TILE_SIZE) / TILE_SIZE;
 515    scene->tiles_y = align(fb->height, TILE_SIZE) / TILE_SIZE;
 516
 517    assert(scene->tiles_x <= TILES_X);
 518    assert(scene->tiles_y <= TILES_Y);
 519 }
 520
 521
 522 void lp_scene_end_binning( struct lp_scene *scene )
 523 {
 524    if (LP_DEBUG & DEBUG_SCENE) {
 525       debug_printf("rasterize scene:\n");
 526       debug_printf("  scene_size: %u\n",
 527                    scene->scene_size);
 528       debug_printf("  data size: %u\n",
 529                    lp_scene_data_size(scene));
 530
 531       if (0)
 532          lp_debug_bins( scene );
 533    }
 534 }