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 (at) 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_velements(void *state, void *data) 123 { 124 struct cso_velements *cso = (struct cso_velements *)state; 125 if (cso->delete_state) 126 cso->delete_state(cso->context, cso->data); 127 FREE(state); 128 } 129 130 static INLINE void delete_cso(void *state, enum cso_cache_type type) 131 { 132 switch (type) { 133 case CSO_BLEND: 134 delete_blend_state(state, 0); 135 break; 136 case CSO_SAMPLER: 137 delete_sampler_state(state, 0); 138 break; 139 case CSO_DEPTH_STENCIL_ALPHA: 140 delete_depth_stencil_state(state, 0); 141 break; 142 case CSO_RASTERIZER: 143 delete_rasterizer_state(state, 0); 144 break; 145 case CSO_VELEMENTS: 146 delete_velements(state, 0); 147 break; 148 default: 149 assert(0); 150 FREE(state); 151 } 152 } 153 154 155 static INLINE void sanitize_hash(struct cso_cache *sc, 156 struct cso_hash *hash, 157 enum cso_cache_type type, 158 int max_size) 159 { 160 if (sc->sanitize_cb) 161 sc->sanitize_cb(hash, type, max_size, sc->sanitize_data); 162 } 163 164 165 static INLINE void sanitize_cb(struct cso_hash *hash, enum cso_cache_type type, 166 int max_size, void *user_data) 167 { 168 /* if we're approach the maximum size, remove fourth of the entries 169 * otherwise every subsequent call will go through the same */ 170 int hash_size = cso_hash_size(hash); 171 int max_entries = (max_size > hash_size) ? max_size : hash_size; 172 int to_remove = (max_size < max_entries) * max_entries/4; 173 if (hash_size > max_size) 174 to_remove += hash_size - max_size; 175 while (to_remove) { 176 /*remove elements until we're good */ 177 /*fixme: currently we pick the nodes to remove at random*/ 178 struct cso_hash_iter iter = cso_hash_first_node(hash); 179 void *cso = cso_hash_take(hash, cso_hash_iter_key(iter)); 180 delete_cso(cso, type); 181 --to_remove; 182 } 183 } 184 185 struct cso_hash_iter 186 cso_insert_state(struct cso_cache *sc, 187 unsigned hash_key, enum cso_cache_type type, 188 void *state) 189 { 190 struct cso_hash *hash = _cso_hash_for_type(sc, type); 191 sanitize_hash(sc, hash, type, sc->max_size); 192 193 return cso_hash_insert(hash, hash_key, state); 194 } 195 196 struct cso_hash_iter 197 cso_find_state(struct cso_cache *sc, 198 unsigned hash_key, enum cso_cache_type type) 199 { 200 struct cso_hash *hash = _cso_hash_for_type(sc, type); 201 202 return cso_hash_find(hash, hash_key); 203 } 204 205 206 void *cso_hash_find_data_from_template( struct cso_hash *hash, 207 unsigned hash_key, 208 void *templ, 209 int size ) 210 { 211 struct cso_hash_iter iter = cso_hash_find(hash, hash_key); 212 while (!cso_hash_iter_is_null(iter)) { 213 void *iter_data = cso_hash_iter_data(iter); 214 if (!memcmp(iter_data, templ, size)) { 215 /* We found a match 216 */ 217 return iter_data; 218 } 219 iter = cso_hash_iter_next(iter); 220 } 221 return NULL; 222 } 223 224 225 struct cso_hash_iter cso_find_state_template(struct cso_cache *sc, 226 unsigned hash_key, enum cso_cache_type type, 227 void *templ, unsigned size) 228 { 229 struct cso_hash_iter iter = cso_find_state(sc, hash_key, type); 230 while (!cso_hash_iter_is_null(iter)) { 231 void *iter_data = cso_hash_iter_data(iter); 232 if (!memcmp(iter_data, templ, size)) 233 return iter; 234 iter = cso_hash_iter_next(iter); 235 } 236 return iter; 237 } 238 239 void * cso_take_state(struct cso_cache *sc, 240 unsigned hash_key, enum cso_cache_type type) 241 { 242 struct cso_hash *hash = _cso_hash_for_type(sc, type); 243 return cso_hash_take(hash, hash_key); 244 } 245 246 struct cso_cache *cso_cache_create(void) 247 { 248 struct cso_cache *sc = MALLOC_STRUCT(cso_cache); 249 int i; 250 if (sc == NULL) 251 return NULL; 252 253 sc->max_size = 4096; 254 for (i = 0; i < CSO_CACHE_MAX; i++) 255 sc->hashes[i] = cso_hash_create(); 256 257 sc->sanitize_cb = sanitize_cb; 258 sc->sanitize_data = 0; 259 260 return sc; 261 } 262 263 void cso_for_each_state(struct cso_cache *sc, enum cso_cache_type type, 264 cso_state_callback func, void *user_data) 265 { 266 struct cso_hash *hash = _cso_hash_for_type(sc, type); 267 struct cso_hash_iter iter; 268 269 iter = cso_hash_first_node(hash); 270 while (!cso_hash_iter_is_null(iter)) { 271 void *state = cso_hash_iter_data(iter); 272 iter = cso_hash_iter_next(iter); 273 if (state) { 274 func(state, user_data); 275 } 276 } 277 } 278 279 void cso_cache_delete(struct cso_cache *sc) 280 { 281 int i; 282 assert(sc); 283 284 if (!sc) 285 return; 286 287 /* delete driver data */ 288 cso_for_each_state(sc, CSO_BLEND, delete_blend_state, 0); 289 cso_for_each_state(sc, CSO_DEPTH_STENCIL_ALPHA, delete_depth_stencil_state, 0); 290 cso_for_each_state(sc, CSO_RASTERIZER, delete_rasterizer_state, 0); 291 cso_for_each_state(sc, CSO_SAMPLER, delete_sampler_state, 0); 292 cso_for_each_state(sc, CSO_VELEMENTS, delete_velements, 0); 293 294 for (i = 0; i < CSO_CACHE_MAX; i++) 295 cso_hash_delete(sc->hashes[i]); 296 297 FREE(sc); 298 } 299 300 void cso_set_maximum_cache_size(struct cso_cache *sc, int number) 301 { 302 int i; 303 304 sc->max_size = number; 305 306 for (i = 0; i < CSO_CACHE_MAX; i++) 307 sanitize_hash(sc, sc->hashes[i], i, sc->max_size); 308 } 309 310 int cso_maximum_cache_size(const struct cso_cache *sc) 311 { 312 return sc->max_size; 313 } 314 315 void cso_cache_set_sanitize_callback(struct cso_cache *sc, 316 cso_sanitize_callback cb, 317 void *user_data) 318 { 319 sc->sanitize_cb = cb; 320 sc->sanitize_data = user_data; 321 } 322 323
