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Member "mesa-20.1.8/src/gallium/drivers/llvmpipe/lp_scene.c" (16 Sep 2020, 15364 Bytes) of package /linux/misc/mesa-20.1.8.tar.xz:


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    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/simple_list.h"
   33 #include "util/format/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    (void) mtx_init(&scene->mutex, mtx_plain);
   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    mtx_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 
  155    //LP_DBG(DEBUG_RAST, "%s\n", __FUNCTION__);
  156 
  157    for (i = 0; i < scene->fb.nr_cbufs; i++) {
  158       struct pipe_surface *cbuf = scene->fb.cbufs[i];
  159 
  160       if (!cbuf) {
  161          scene->cbufs[i].stride = 0;
  162          scene->cbufs[i].layer_stride = 0;
  163          scene->cbufs[i].map = NULL;
  164          continue;
  165       }
  166 
  167       if (llvmpipe_resource_is_texture(cbuf->texture)) {
  168          scene->cbufs[i].stride = llvmpipe_resource_stride(cbuf->texture,
  169                                                            cbuf->u.tex.level);
  170          scene->cbufs[i].layer_stride = llvmpipe_layer_stride(cbuf->texture,
  171                                                               cbuf->u.tex.level);
  172 
  173          scene->cbufs[i].map = llvmpipe_resource_map(cbuf->texture,
  174                                                      cbuf->u.tex.level,
  175                                                      cbuf->u.tex.first_layer,
  176                                                      LP_TEX_USAGE_READ_WRITE);
  177          scene->cbufs[i].format_bytes = util_format_get_blocksize(cbuf->format);
  178       }
  179       else {
  180          struct llvmpipe_resource *lpr = llvmpipe_resource(cbuf->texture);
  181          unsigned pixstride = util_format_get_blocksize(cbuf->format);
  182          scene->cbufs[i].stride = cbuf->texture->width0;
  183          scene->cbufs[i].layer_stride = 0;
  184          scene->cbufs[i].map = lpr->data;
  185          scene->cbufs[i].map += cbuf->u.buf.first_element * pixstride;
  186          scene->cbufs[i].format_bytes = util_format_get_blocksize(cbuf->format);
  187       }
  188    }
  189 
  190    if (fb->zsbuf) {
  191       struct pipe_surface *zsbuf = scene->fb.zsbuf;
  192       scene->zsbuf.stride = llvmpipe_resource_stride(zsbuf->texture, zsbuf->u.tex.level);
  193       scene->zsbuf.layer_stride = llvmpipe_layer_stride(zsbuf->texture, zsbuf->u.tex.level);
  194 
  195       scene->zsbuf.map = llvmpipe_resource_map(zsbuf->texture,
  196                                                zsbuf->u.tex.level,
  197                                                zsbuf->u.tex.first_layer,
  198                                                LP_TEX_USAGE_READ_WRITE);
  199       scene->zsbuf.format_bytes = util_format_get_blocksize(zsbuf->format);
  200    }
  201 }
  202 
  203 
  204 
  205 
  206 /**
  207  * Free all the temporary data in a scene.
  208  */
  209 void
  210 lp_scene_end_rasterization(struct lp_scene *scene )
  211 {
  212    int i, j;
  213 
  214    /* Unmap color buffers */
  215    for (i = 0; i < scene->fb.nr_cbufs; i++) {
  216       if (scene->cbufs[i].map) {
  217          struct pipe_surface *cbuf = scene->fb.cbufs[i];
  218          if (llvmpipe_resource_is_texture(cbuf->texture)) {
  219             llvmpipe_resource_unmap(cbuf->texture,
  220                                     cbuf->u.tex.level,
  221                                     cbuf->u.tex.first_layer);
  222          }
  223          scene->cbufs[i].map = NULL;
  224       }
  225    }
  226 
  227    /* Unmap z/stencil buffer */
  228    if (scene->zsbuf.map) {
  229       struct pipe_surface *zsbuf = scene->fb.zsbuf;
  230       llvmpipe_resource_unmap(zsbuf->texture,
  231                               zsbuf->u.tex.level,
  232                               zsbuf->u.tex.first_layer);
  233       scene->zsbuf.map = NULL;
  234    }
  235 
  236    /* Reset all command lists:
  237     */
  238    for (i = 0; i < scene->tiles_x; i++) {
  239       for (j = 0; j < scene->tiles_y; j++) {
  240          struct cmd_bin *bin = lp_scene_get_bin(scene, i, j);
  241          bin->head = NULL;
  242          bin->tail = NULL;
  243          bin->last_state = NULL;
  244       }
  245    }
  246 
  247    /* If there are any bins which weren't cleared by the loop above,
  248     * they will be caught (on debug builds at least) by this assert:
  249     */
  250    assert(lp_scene_is_empty(scene));
  251 
  252    /* Decrement texture ref counts
  253     */
  254    {
  255       struct resource_ref *ref;
  256       int i, j = 0;
  257 
  258       for (ref = scene->resources; ref; ref = ref->next) {
  259          for (i = 0; i < ref->count; i++) {
  260             if (LP_DEBUG & DEBUG_SETUP)
  261                debug_printf("resource %d: %p %dx%d sz %d\n",
  262                             j,
  263                             (void *) ref->resource[i],
  264                             ref->resource[i]->width0,
  265                             ref->resource[i]->height0,
  266                             llvmpipe_resource_size(ref->resource[i]));
  267             j++;
  268             pipe_resource_reference(&ref->resource[i], NULL);
  269          }
  270       }
  271 
  272       if (LP_DEBUG & DEBUG_SETUP)
  273          debug_printf("scene %d resources, sz %d\n",
  274                       j, scene->resource_reference_size);
  275    }
  276 
  277    /* Free all scene data blocks:
  278     */
  279    {
  280       struct data_block_list *list = &scene->data;
  281       struct data_block *block, *tmp;
  282 
  283       for (block = list->head->next; block; block = tmp) {
  284          tmp = block->next;
  285      FREE(block);
  286       }
  287 
  288       list->head->next = NULL;
  289       list->head->used = 0;
  290    }
  291 
  292    lp_fence_reference(&scene->fence, NULL);
  293 
  294    scene->resources = NULL;
  295    scene->scene_size = 0;
  296    scene->resource_reference_size = 0;
  297 
  298    scene->alloc_failed = FALSE;
  299 
  300    util_unreference_framebuffer_state( &scene->fb );
  301 }
  302 
  303 
  304 
  305 
  306 
  307 
  308 struct cmd_block *
  309 lp_scene_new_cmd_block( struct lp_scene *scene,
  310                         struct cmd_bin *bin )
  311 {
  312    struct cmd_block *block = lp_scene_alloc(scene, sizeof(struct cmd_block));
  313    if (block) {
  314       if (bin->tail) {
  315          bin->tail->next = block;
  316          bin->tail = block;
  317       }
  318       else {
  319          bin->head = block;
  320          bin->tail = block;
  321       }
  322       //memset(block, 0, sizeof *block);
  323       block->next = NULL;
  324       block->count = 0;
  325    }
  326    return block;
  327 }
  328 
  329 
  330 struct data_block *
  331 lp_scene_new_data_block( struct lp_scene *scene )
  332 {
  333    if (scene->scene_size + DATA_BLOCK_SIZE > LP_SCENE_MAX_SIZE) {
  334       if (0) debug_printf("%s: failed\n", __FUNCTION__);
  335       scene->alloc_failed = TRUE;
  336       return NULL;
  337    }
  338    else {
  339       struct data_block *block = MALLOC_STRUCT(data_block);
  340       if (!block)
  341          return NULL;
  342       
  343       scene->scene_size += sizeof *block;
  344 
  345       block->used = 0;
  346       block->next = scene->data.head;
  347       scene->data.head = block;
  348 
  349       return block;
  350    }
  351 }
  352 
  353 
  354 /**
  355  * Return number of bytes used for all bin data within a scene.
  356  * This does not include resources (textures) referenced by the scene.
  357  */
  358 static unsigned
  359 lp_scene_data_size( const struct lp_scene *scene )
  360 {
  361    unsigned size = 0;
  362    const struct data_block *block;
  363    for (block = scene->data.head; block; block = block->next) {
  364       size += block->used;
  365    }
  366    return size;
  367 }
  368 
  369 
  370 
  371 /**
  372  * Add a reference to a resource by the scene.
  373  */
  374 boolean
  375 lp_scene_add_resource_reference(struct lp_scene *scene,
  376                                 struct pipe_resource *resource,
  377                                 boolean initializing_scene)
  378 {
  379    struct resource_ref *ref, **last = &scene->resources;
  380    int i;
  381 
  382    /* Look at existing resource blocks:
  383     */
  384    for (ref = scene->resources; ref; ref = ref->next) {
  385       last = &ref->next;
  386 
  387       /* Search for this resource:
  388        */
  389       for (i = 0; i < ref->count; i++)
  390          if (ref->resource[i] == resource)
  391             return TRUE;
  392 
  393       if (ref->count < RESOURCE_REF_SZ) {
  394          /* If the block is half-empty, then append the reference here.
  395           */
  396          break;
  397       }
  398    }
  399 
  400    /* Create a new block if no half-empty block was found.
  401     */
  402    if (!ref) {
  403       assert(*last == NULL);
  404       *last = lp_scene_alloc(scene, sizeof *ref);
  405       if (*last == NULL)
  406           return FALSE;
  407 
  408       ref = *last;
  409       memset(ref, 0, sizeof *ref);
  410    }
  411 
  412    /* Append the reference to the reference block.
  413     */
  414    pipe_resource_reference(&ref->resource[ref->count++], resource);
  415    scene->resource_reference_size += llvmpipe_resource_size(resource);
  416 
  417    /* Heuristic to advise scene flushes.  This isn't helpful in the
  418     * initial setup of the scene, but after that point flush on the
  419     * next resource added which exceeds 64MB in referenced texture
  420     * data.
  421     */
  422    if (!initializing_scene &&
  423        scene->resource_reference_size >= LP_SCENE_MAX_RESOURCE_SIZE)
  424       return FALSE;
  425 
  426    return TRUE;
  427 }
  428 
  429 
  430 /**
  431  * Does this scene have a reference to the given resource?
  432  */
  433 boolean
  434 lp_scene_is_resource_referenced(const struct lp_scene *scene,
  435                                 const struct pipe_resource *resource)
  436 {
  437    const struct resource_ref *ref;
  438    int i;
  439 
  440    for (ref = scene->resources; ref; ref = ref->next) {
  441       for (i = 0; i < ref->count; i++)
  442          if (ref->resource[i] == resource)
  443             return TRUE;
  444    }
  445 
  446    return FALSE;
  447 }
  448 
  449 
  450 
  451 
  452 /** advance curr_x,y to the next bin */
  453 static boolean
  454 next_bin(struct lp_scene *scene)
  455 {
  456    scene->curr_x++;
  457    if (scene->curr_x >= scene->tiles_x) {
  458       scene->curr_x = 0;
  459       scene->curr_y++;
  460    }
  461    if (scene->curr_y >= scene->tiles_y) {
  462       /* no more bins */
  463       return FALSE;
  464    }
  465    return TRUE;
  466 }
  467 
  468 
  469 void
  470 lp_scene_bin_iter_begin( struct lp_scene *scene )
  471 {
  472    scene->curr_x = scene->curr_y = -1;
  473 }
  474 
  475 
  476 /**
  477  * Return pointer to next bin to be rendered.
  478  * The lp_scene::curr_x and ::curr_y fields will be advanced.
  479  * Multiple rendering threads will call this function to get a chunk
  480  * of work (a bin) to work on.
  481  */
  482 struct cmd_bin *
  483 lp_scene_bin_iter_next( struct lp_scene *scene , int *x, int *y)
  484 {
  485    struct cmd_bin *bin = NULL;
  486 
  487    mtx_lock(&scene->mutex);
  488 
  489    if (scene->curr_x < 0) {
  490       /* first bin */
  491       scene->curr_x = 0;
  492       scene->curr_y = 0;
  493    }
  494    else if (!next_bin(scene)) {
  495       /* no more bins left */
  496       goto end;
  497    }
  498 
  499    bin = lp_scene_get_bin(scene, scene->curr_x, scene->curr_y);
  500    *x = scene->curr_x;
  501    *y = scene->curr_y;
  502 
  503 end:
  504    /*printf("return bin %p at %d, %d\n", (void *) bin, *bin_x, *bin_y);*/
  505    mtx_unlock(&scene->mutex);
  506    return bin;
  507 }
  508 
  509 
  510 void lp_scene_begin_binning(struct lp_scene *scene,
  511                             struct pipe_framebuffer_state *fb)
  512 {
  513    int i;
  514    unsigned max_layer = ~0;
  515 
  516    assert(lp_scene_is_empty(scene));
  517 
  518    util_copy_framebuffer_state(&scene->fb, fb);
  519 
  520    scene->tiles_x = align(fb->width, TILE_SIZE) / TILE_SIZE;
  521    scene->tiles_y = align(fb->height, TILE_SIZE) / TILE_SIZE;
  522    assert(scene->tiles_x <= TILES_X);
  523    assert(scene->tiles_y <= TILES_Y);
  524 
  525    /*
  526     * Determine how many layers the fb has (used for clamping layer value).
  527     * OpenGL (but not d3d10) permits different amount of layers per rt, however
  528     * results are undefined if layer exceeds the amount of layers of ANY
  529     * attachment hence don't need separate per cbuf and zsbuf max.
  530     */
  531    for (i = 0; i < scene->fb.nr_cbufs; i++) {
  532       struct pipe_surface *cbuf = scene->fb.cbufs[i];
  533       if (cbuf) {
  534          if (llvmpipe_resource_is_texture(cbuf->texture)) {
  535             max_layer = MIN2(max_layer,
  536                              cbuf->u.tex.last_layer - cbuf->u.tex.first_layer);
  537          }
  538          else {
  539             max_layer = 0;
  540          }
  541       }
  542    }
  543    if (fb->zsbuf) {
  544       struct pipe_surface *zsbuf = scene->fb.zsbuf;
  545       max_layer = MIN2(max_layer, zsbuf->u.tex.last_layer - zsbuf->u.tex.first_layer);
  546    }
  547    scene->fb_max_layer = max_layer;
  548 }
  549 
  550 
  551 void lp_scene_end_binning( struct lp_scene *scene )
  552 {
  553    if (LP_DEBUG & DEBUG_SCENE) {
  554       debug_printf("rasterize scene:\n");
  555       debug_printf("  scene_size: %u\n",
  556                    scene->scene_size);
  557       debug_printf("  data size: %u\n",
  558                    lp_scene_data_size(scene));
  559 
  560       if (0)
  561          lp_debug_bins( scene );
  562    }
  563 }