src/gallium/drivers/llvmpipe/lp_scene.h

   1 /**************************************************************************
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   3  * Copyright 2009 VMware, Inc.
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  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
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  27
  28
  29 /**
  30  * Binner data structures and bin-related functions.
  31  * Note: the "setup" code is concerned with building scenes while
  32  * The "rast" code is concerned with consuming/executing scenes.
  33  */
  34
  35 #ifndef LP_SCENE_H
  36 #define LP_SCENE_H
  37
  38 #include "os/os_thread.h"
  39 #include "lp_rast.h"
  40 #include "lp_debug.h"
  41
  42 struct lp_scene_queue;
  43 struct lp_rast_state;
  44
  45 /* We're limited to 2K by 2K for 32bit fixed point rasterization.
  46  * Will need a 64-bit version for larger framebuffers.
  47  */
  48 #define TILES_X (LP_MAX_WIDTH / TILE_SIZE)
  49 #define TILES_Y (LP_MAX_HEIGHT / TILE_SIZE)
  50
  51
  52 /* Commands per command block (ideally so sizeof(cmd_block) is a power of
  53  * two in size.)
  54  */
  55 #define CMD_BLOCK_MAX 29
  56
  57 /* Bytes per data block.
  58  */
  59 #define DATA_BLOCK_SIZE (64 * 1024)
  60
  61 /* Scene temporary storage is clamped to this size:
  62  */
  63 #define LP_SCENE_MAX_SIZE (9*1024*1024)
  64
  65 /* The maximum amount of texture storage referenced by a scene is
  66  * clamped to this size:
  67  */
  68 #define LP_SCENE_MAX_RESOURCE_SIZE (64*1024*1024)
  69
  70
  71 /* switch to a non-pointer value for this:
  72  */
  73 typedef void (*lp_rast_cmd_func)( struct lp_rasterizer_task *,
  74                                   const union lp_rast_cmd_arg );
  75
  76
  77 struct cmd_block {
  78    uint8_t cmd[CMD_BLOCK_MAX];
  79    union lp_rast_cmd_arg arg[CMD_BLOCK_MAX];
  80    unsigned count;
  81    struct cmd_block *next;
  82 };
  83
  84
  85 struct data_block {
  86    ubyte data[DATA_BLOCK_SIZE];
  87    unsigned used;
  88    struct data_block *next;
  89 };
  90
  91
  92
  93 /**
  94  * For each screen tile we have one of these bins.
  95  */
  96 struct cmd_bin {
  97    const struct lp_rast_state *last_state;       /* most recent state set in bin */
  98    struct cmd_block *head;
  99    struct cmd_block *tail;
 100 };
 101
 102
 103 /**
 104  * This stores bulk data which is used for all memory allocations
 105  * within a scene.
 106  *
 107  * Examples include triangle data and state data.  The commands in
 108  * the per-tile bins will point to chunks of data in this structure.
 109  *
 110  * Include the first block of data statically to ensure we can always
 111  * initiate a scene without relying on malloc succeeding.
 112  */
 113 struct data_block_list {
 114    struct data_block first;
 115    struct data_block *head;
 116 };
 117
 118 struct resource_ref;
 119
 120 /**
 121  * All bins and bin data are contained here.
 122  * Per-bin data goes into the 'tile' bins.
 123  * Shared data goes into the 'data' buffer.
 124  *
 125  * When there are multiple threads, will want to double-buffer between
 126  * scenes:
 127  */
 128 struct lp_scene {
 129    struct pipe_context *pipe;
 130    struct lp_fence *fence;
 131
 132    /* The queries still active at end of scene */
 133    struct llvmpipe_query *active_queries[LP_MAX_ACTIVE_BINNED_QUERIES];
 134    unsigned num_active_queries;
 135    /* If queries were either active or there were begin/end query commands */
 136    boolean had_queries;
 137
 138    /* Framebuffer mappings - valid only between begin_rasterization()
 139     * and end_rasterization().
 140     */
 141    struct {
 142       uint8_t *map;
 143       unsigned stride;
 144       unsigned layer_stride;
 145       unsigned format_bytes;
 146    } zsbuf, cbufs[PIPE_MAX_COLOR_BUFS];
 147
 148    /* The amount of layers in the fb (minimum of all attachments) */
 149    unsigned fb_max_layer;
 150
 151    /** the framebuffer to render the scene into */
 152    struct pipe_framebuffer_state fb;
 153
 154    /** list of resources referenced by the scene commands */
 155    struct resource_ref *resources;
 156
 157    /** Total memory used by the scene (in bytes).  This sums all the
 158     * data blocks and counts all bins, state, resource references and
 159     * other random allocations within the scene.
 160     */
 161    unsigned scene_size;
 162
 163    /** Sum of sizes of all resources referenced by the scene.  Sums
 164     * all the textures read by the scene:
 165     */
 166    unsigned resource_reference_size;
 167
 168    boolean alloc_failed;
 169    /**
 170     * Number of active tiles in each dimension.
 171     * This basically the framebuffer size divided by tile size
 172     */
 173    unsigned tiles_x, tiles_y;
 174
 175    int curr_x, curr_y;  /**< for iterating over bins */
 176    mtx_t mutex;
 177
 178    struct cmd_bin tile[TILES_X][TILES_Y];
 179    struct data_block_list data;
 180 };
 181
 182
 183
 184 struct lp_scene *lp_scene_create(struct pipe_context *pipe);
 185
 186 void lp_scene_destroy(struct lp_scene *scene);
 187
 188 boolean lp_scene_is_empty(struct lp_scene *scene );
 189 boolean lp_scene_is_oom(struct lp_scene *scene );
 190
 191
 192 struct data_block *lp_scene_new_data_block( struct lp_scene *scene );
 193
 194 struct cmd_block *lp_scene_new_cmd_block( struct lp_scene *scene,
 195                                           struct cmd_bin *bin );
 196
 197 boolean lp_scene_add_resource_reference(struct lp_scene *scene,
 198                                         struct pipe_resource *resource,
 199                                         boolean initializing_scene);
 200
 201 boolean lp_scene_is_resource_referenced(const struct lp_scene *scene,
 202                                         const struct pipe_resource *resource );
 203
 204
 205 /**
 206  * Allocate space for a command/data in the bin's data buffer.
 207  * Grow the block list if needed.
 208  */
 209 static inline void *
 210 lp_scene_alloc( struct lp_scene *scene, unsigned size)
 211 {
 212    struct data_block_list *list = &scene->data;
 213    struct data_block *block = list->head;
 214
 215    assert(size <= DATA_BLOCK_SIZE);
 216    assert(block != NULL);
 217
 218    if (LP_DEBUG & DEBUG_MEM)
 219       debug_printf("alloc %u block %u/%u tot %u/%u\n",
 220                    size, block->used, DATA_BLOCK_SIZE,
 221                    scene->scene_size, LP_SCENE_MAX_SIZE);
 222
 223    if (block->used + size > DATA_BLOCK_SIZE) {
 224       block = lp_scene_new_data_block( scene );
 225       if (!block) {
 226          /* out of memory */
 227          return NULL;
 228       }
 229    }
 230
 231    {
 232       ubyte *data = block->data + block->used;
 233       block->used += size;
 234       return data;
 235    }
 236 }
 237
 238
 239 /**
 240  * As above, but with specific alignment.
 241  */
 242 static inline void *
 243 lp_scene_alloc_aligned( struct lp_scene *scene, unsigned size,
 244                         unsigned alignment )
 245 {
 246    struct data_block_list *list = &scene->data;
 247    struct data_block *block = list->head;
 248
 249    assert(block != NULL);
 250
 251    if (LP_DEBUG & DEBUG_MEM)
 252       debug_printf("alloc %u block %u/%u tot %u/%u\n",
 253                    size + alignment - 1,
 254                    block->used, DATA_BLOCK_SIZE,
 255                    scene->scene_size, LP_SCENE_MAX_SIZE);
 256
 257    if (block->used + size + alignment - 1 > DATA_BLOCK_SIZE) {
 258       block = lp_scene_new_data_block( scene );
 259       if (!block)
 260          return NULL;
 261    }
 262
 263    {
 264       ubyte *data = block->data + block->used;
 265       unsigned offset = (((uintptr_t)data + alignment - 1) & ~(alignment - 1)) - (uintptr_t)data;
 266       block->used += offset + size;
 267       return data + offset;
 268    }
 269 }
 270
 271
 272 /* Put back data if we decide not to use it, eg. culled triangles.
 273  */
 274 static inline void
 275 lp_scene_putback_data( struct lp_scene *scene, unsigned size)
 276 {
 277    struct data_block_list *list = &scene->data;
 278    assert(list->head && list->head->used >= size);
 279    list->head->used -= size;
 280 }
 281
 282
 283 /** Return pointer to a particular tile's bin. */
 284 static inline struct cmd_bin *
 285 lp_scene_get_bin(struct lp_scene *scene, unsigned x, unsigned y)
 286 {
 287    return &scene->tile[x][y];
 288 }
 289
 290
 291 /** Remove all commands from a bin */
 292 void
 293 lp_scene_bin_reset(struct lp_scene *scene, unsigned x, unsigned y);
 294
 295
 296 /* Add a command to bin[x][y].
 297  */
 298 static inline boolean
 299 lp_scene_bin_command( struct lp_scene *scene,
 300                       unsigned x, unsigned y,
 301                       unsigned cmd,
 302                       union lp_rast_cmd_arg arg )
 303 {
 304    struct cmd_bin *bin = lp_scene_get_bin(scene, x, y);
 305    struct cmd_block *tail = bin->tail;
 306
 307    assert(x < scene->tiles_x);
 308    assert(y < scene->tiles_y);
 309    assert(cmd < LP_RAST_OP_MAX);
 310
 311    if (tail == NULL || tail->count == CMD_BLOCK_MAX) {
 312       tail = lp_scene_new_cmd_block( scene, bin );
 313       if (!tail) {
 314          return FALSE;
 315       }
 316       assert(tail->count == 0);
 317    }
 318
 319    {
 320       unsigned i = tail->count;
 321       tail->cmd[i] = cmd & LP_RAST_OP_MASK;
 322       tail->arg[i] = arg;
 323       tail->count++;
 324    }
 325
 326    return TRUE;
 327 }
 328
 329
 330 static inline boolean
 331 lp_scene_bin_cmd_with_state( struct lp_scene *scene,
 332                              unsigned x, unsigned y,
 333                              const struct lp_rast_state *state,
 334                              unsigned cmd,
 335                              union lp_rast_cmd_arg arg )
 336 {
 337    struct cmd_bin *bin = lp_scene_get_bin(scene, x, y);
 338
 339    if (state != bin->last_state) {
 340       bin->last_state = state;
 341       if (!lp_scene_bin_command(scene, x, y,
 342                                 LP_RAST_OP_SET_STATE,
 343                                 lp_rast_arg_state(state)))
 344          return FALSE;
 345    }
 346
 347    if (!lp_scene_bin_command( scene, x, y, cmd, arg ))
 348       return FALSE;
 349
 350    return TRUE;
 351 }
 352
 353
 354 /* Add a command to all active bins.
 355  */
 356 static inline boolean
 357 lp_scene_bin_everywhere( struct lp_scene *scene,
 358                          unsigned cmd,
 359                          const union lp_rast_cmd_arg arg )
 360 {
 361    unsigned i, j;
 362    for (i = 0; i < scene->tiles_x; i++) {
 363       for (j = 0; j < scene->tiles_y; j++) {
 364          if (!lp_scene_bin_command( scene, i, j, cmd, arg ))
 365             return FALSE;
 366       }
 367    }
 368
 369    return TRUE;
 370 }
 371
 372
 373 static inline unsigned
 374 lp_scene_get_num_bins( const struct lp_scene *scene )
 375 {
 376    return scene->tiles_x * scene->tiles_y;
 377 }
 378
 379
 380 void
 381 lp_scene_bin_iter_begin( struct lp_scene *scene );
 382
 383 struct cmd_bin *
 384 lp_scene_bin_iter_next( struct lp_scene *scene, int *x, int *y );
 385
 386
 387
 388 /* Begin/end binning of a scene
 389  */
 390 void
 391 lp_scene_begin_binning(struct lp_scene *scene,
 392                        struct pipe_framebuffer_state *fb);
 393
 394 void
 395 lp_scene_end_binning(struct lp_scene *scene);
 396
 397
 398 /* Begin/end rasterization of a scene
 399  */
 400 void
 401 lp_scene_begin_rasterization(struct lp_scene *scene);
 402
 403 void
 404 lp_scene_end_rasterization(struct lp_scene *scene);
 405
 406
 407
 408
 409
 410 #endif /* LP_BIN_H */