workbench/libs/mesa/src/gallium/auxiliary/cso_cache/cso_cache.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
   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 TUNGSTEN GRAPHICS 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 /* Authors:  Zack Rusin <zack@tungstengraphics.com>
  29  */
  30
  31 #include "util/u_debug.h"
  32
  33 #include "util/u_memory.h"
  34
  35 #include "cso_cache.h"
  36 #include "cso_hash.h"
  37
  38
  39 struct cso_cache {
  40    struct cso_hash *hashes[CSO_CACHE_MAX];
  41    int    max_size;
  42
  43    cso_sanitize_callback sanitize_cb;
  44    void                 *sanitize_data;
  45 };
  46
  47 #if 1
  48 static unsigned hash_key(const void *key, unsigned key_size)
  49 {
  50    unsigned *ikey = (unsigned *)key;
  51    unsigned hash = 0, i;
  52
  53    assert(key_size % 4 == 0);
  54
  55    /* I'm sure this can be improved on:
  56     */
  57    for (i = 0; i < key_size/4; i++)
  58       hash ^= ikey[i];
  59
  60    return hash;
  61 }
  62 #else
  63 static unsigned hash_key(const unsigned char *p, int n)
  64 {
  65    unsigned h = 0;
  66    unsigned g;
  67
  68    while (n--) {
  69       h = (h << 4) + *p++;
  70       if ((g = (h & 0xf0000000)) != 0)
  71          h ^= g >> 23;
  72       h &= ~g;
  73    }
  74    return h;
  75 }
  76 #endif
  77
  78 unsigned cso_construct_key(void *item, int item_size)
  79 {
  80    return hash_key((item), item_size);
  81 }
  82
  83 static INLINE struct cso_hash *_cso_hash_for_type(struct cso_cache *sc, enum cso_cache_type type)
  84 {
  85    struct cso_hash *hash;
  86    hash = sc->hashes[type];
  87    return hash;
  88 }
  89
  90 static void delete_blend_state(void *state, void *data)
  91 {
  92    struct cso_blend *cso = (struct cso_blend *)state;
  93    if (cso->delete_state)
  94       cso->delete_state(cso->context, cso->data);
  95    FREE(state);
  96 }
  97
  98 static void delete_depth_stencil_state(void *state, void *data)
  99 {
 100    struct cso_depth_stencil_alpha *cso = (struct cso_depth_stencil_alpha *)state;
 101    if (cso->delete_state)
 102       cso->delete_state(cso->context, cso->data);
 103    FREE(state);
 104 }
 105
 106 static void delete_sampler_state(void *state, void *data)
 107 {
 108    struct cso_sampler *cso = (struct cso_sampler *)state;
 109    if (cso->delete_state)
 110       cso->delete_state(cso->context, cso->data);
 111    FREE(state);
 112 }
 113
 114 static void delete_rasterizer_state(void *state, void *data)
 115 {
 116    struct cso_rasterizer *cso = (struct cso_rasterizer *)state;
 117    if (cso->delete_state)
 118       cso->delete_state(cso->context, cso->data);
 119    FREE(state);
 120 }
 121
 122 static void delete_fs_state(void *state, void *data)
 123 {
 124    struct cso_fragment_shader *cso = (struct cso_fragment_shader *)state;
 125    if (cso->delete_state)
 126       cso->delete_state(cso->context, cso->data);
 127    FREE(state);
 128 }
 129
 130 static void delete_vs_state(void *state, void *data)
 131 {
 132    struct cso_vertex_shader *cso = (struct cso_vertex_shader *)state;
 133    if (cso->delete_state)
 134       cso->delete_state(cso->context, cso->data);
 135    FREE(state);
 136 }
 137
 138 static void delete_velements(void *state, void *data)
 139 {
 140    struct cso_velements *cso = (struct cso_velements *)state;
 141    if (cso->delete_state)
 142       cso->delete_state(cso->context, cso->data);
 143    FREE(state);
 144 }
 145
 146 static INLINE void delete_cso(void *state, enum cso_cache_type type)
 147 {
 148    switch (type) {
 149    case CSO_BLEND:
 150       delete_blend_state(state, 0);
 151       break;
 152    case CSO_SAMPLER:
 153       delete_sampler_state(state, 0);
 154       break;
 155    case CSO_DEPTH_STENCIL_ALPHA:
 156       delete_depth_stencil_state(state, 0);
 157       break;
 158    case CSO_RASTERIZER:
 159       delete_rasterizer_state(state, 0);
 160       break;
 161    case CSO_FRAGMENT_SHADER:
 162       delete_fs_state(state, 0);
 163       break;
 164    case CSO_VERTEX_SHADER:
 165       delete_vs_state(state, 0);
 166       break;
 167    case CSO_VELEMENTS:
 168       delete_velements(state, 0);
 169       break;
 170    default:
 171       assert(0);
 172       FREE(state);
 173    }
 174 }
 175
 176
 177 static INLINE void sanitize_hash(struct cso_cache *sc,
 178                                  struct cso_hash *hash,
 179                                  enum cso_cache_type type,
 180                                  int max_size)
 181 {
 182    if (sc->sanitize_cb)
 183       sc->sanitize_cb(hash, type, max_size, sc->sanitize_data);
 184 }
 185
 186
 187 static INLINE void sanitize_cb(struct cso_hash *hash, enum cso_cache_type type,
 188                                int max_size, void *user_data)
 189 {
 190    /* if we're approach the maximum size, remove fourth of the entries
 191     * otherwise every subsequent call will go through the same */
 192    int hash_size = cso_hash_size(hash);
 193    int max_entries = (max_size > hash_size) ? max_size : hash_size;
 194    int to_remove =  (max_size < max_entries) * max_entries/4;
 195    if (hash_size > max_size)
 196       to_remove += hash_size - max_size;
 197    while (to_remove) {
 198       /*remove elements until we're good */
 199       /*fixme: currently we pick the nodes to remove at random*/
 200       struct cso_hash_iter iter = cso_hash_first_node(hash);
 201       void  *cso = cso_hash_take(hash, cso_hash_iter_key(iter));
 202       delete_cso(cso, type);
 203       --to_remove;
 204    }
 205 }
 206
 207 struct cso_hash_iter
 208 cso_insert_state(struct cso_cache *sc,
 209                  unsigned hash_key, enum cso_cache_type type,
 210                  void *state)
 211 {
 212    struct cso_hash *hash = _cso_hash_for_type(sc, type);
 213    sanitize_hash(sc, hash, type, sc->max_size);
 214
 215    return cso_hash_insert(hash, hash_key, state);
 216 }
 217
 218 struct cso_hash_iter
 219 cso_find_state(struct cso_cache *sc,
 220                unsigned hash_key, enum cso_cache_type type)
 221 {
 222    struct cso_hash *hash = _cso_hash_for_type(sc, type);
 223
 224    return cso_hash_find(hash, hash_key);
 225 }
 226
 227
 228 void *cso_hash_find_data_from_template( struct cso_hash *hash,
 229                                         unsigned hash_key,
 230                                         void *templ,
 231                                         int size )
 232 {
 233    struct cso_hash_iter iter = cso_hash_find(hash, hash_key);
 234    while (!cso_hash_iter_is_null(iter)) {
 235       void *iter_data = cso_hash_iter_data(iter);
 236       if (!memcmp(iter_data, templ, size)) {
 237          /* We found a match
 238           */
 239          return iter_data;
 240       }
 241       iter = cso_hash_iter_next(iter);
 242    }
 243    return NULL;
 244 }
 245
 246
 247 struct cso_hash_iter cso_find_state_template(struct cso_cache *sc,
 248                                              unsigned hash_key, enum cso_cache_type type,
 249                                              void *templ, unsigned size)
 250 {
 251    struct cso_hash_iter iter = cso_find_state(sc, hash_key, type);
 252    while (!cso_hash_iter_is_null(iter)) {
 253       void *iter_data = cso_hash_iter_data(iter);
 254       if (!memcmp(iter_data, templ, size))
 255          return iter;
 256       iter = cso_hash_iter_next(iter);
 257    }
 258    return iter;
 259 }
 260
 261 void * cso_take_state(struct cso_cache *sc,
 262                       unsigned hash_key, enum cso_cache_type type)
 263 {
 264    struct cso_hash *hash = _cso_hash_for_type(sc, type);
 265    return cso_hash_take(hash, hash_key);
 266 }
 267
 268 struct cso_cache *cso_cache_create(void)
 269 {
 270    struct cso_cache *sc = MALLOC_STRUCT(cso_cache);
 271    int i;
 272    if (sc == NULL)
 273       return NULL;
 274
 275    sc->max_size           = 4096;
 276    for (i = 0; i < CSO_CACHE_MAX; i++)
 277       sc->hashes[i] = cso_hash_create();
 278
 279    sc->sanitize_cb        = sanitize_cb;
 280    sc->sanitize_data      = 0;
 281
 282    return sc;
 283 }
 284
 285 void cso_for_each_state(struct cso_cache *sc, enum cso_cache_type type,
 286                         cso_state_callback func, void *user_data)
 287 {
 288    struct cso_hash *hash = _cso_hash_for_type(sc, type);
 289    struct cso_hash_iter iter;
 290
 291    iter = cso_hash_first_node(hash);
 292    while (!cso_hash_iter_is_null(iter)) {
 293       void *state = cso_hash_iter_data(iter);
 294       iter = cso_hash_iter_next(iter);
 295       if (state) {
 296          func(state, user_data);
 297       }
 298    }
 299 }
 300
 301 void cso_cache_delete(struct cso_cache *sc)
 302 {
 303    int i;
 304    assert(sc);
 305
 306    if (!sc)
 307       return;
 308
 309    /* delete driver data */
 310    cso_for_each_state(sc, CSO_BLEND, delete_blend_state, 0);
 311    cso_for_each_state(sc, CSO_DEPTH_STENCIL_ALPHA, delete_depth_stencil_state, 0);
 312    cso_for_each_state(sc, CSO_FRAGMENT_SHADER, delete_fs_state, 0);
 313    cso_for_each_state(sc, CSO_VERTEX_SHADER, delete_vs_state, 0);
 314    cso_for_each_state(sc, CSO_RASTERIZER, delete_rasterizer_state, 0);
 315    cso_for_each_state(sc, CSO_SAMPLER, delete_sampler_state, 0);
 316    cso_for_each_state(sc, CSO_VELEMENTS, delete_velements, 0);
 317
 318    for (i = 0; i < CSO_CACHE_MAX; i++)
 319       cso_hash_delete(sc->hashes[i]);
 320
 321    FREE(sc);
 322 }
 323
 324 void cso_set_maximum_cache_size(struct cso_cache *sc, int number)
 325 {
 326    int i;
 327
 328    sc->max_size = number;
 329
 330    for (i = 0; i < CSO_CACHE_MAX; i++)
 331       sanitize_hash(sc, sc->hashes[i], i, sc->max_size);
 332 }
 333
 334 int cso_maximum_cache_size(const struct cso_cache *sc)
 335 {
 336    return sc->max_size;
 337 }
 338
 339 void cso_cache_set_sanitize_callback(struct cso_cache *sc,
 340                                      cso_sanitize_callback cb,
 341                                      void *user_data)
 342 {
 343    sc->sanitize_cb   = cb;
 344    sc->sanitize_data = user_data;
 345 }
 346