src/gallium/drivers/softpipe/sp_tex_tile_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 /**
  29  * Texture tile caching.
  30  *
  31  * Author:
  32  *    Brian Paul
  33  */
  34
  35 #include "util/u_inlines.h"
  36 #include "util/u_memory.h"
  37 #include "util/u_tile.h"
  38 #include "util/u_math.h"
  39 #include "sp_context.h"
  40 #include "sp_texture.h"
  41 #include "sp_tex_tile_cache.h"
  42
  43
  44
  45 struct softpipe_tex_tile_cache *
  46 sp_create_tex_tile_cache( struct pipe_context *pipe )
  47 {
  48    struct softpipe_tex_tile_cache *tc;
  49    uint pos;
  50
  51    /* make sure max texture size works */
  52    assert((TILE_SIZE << TEX_ADDR_BITS) >= (1 << (SP_MAX_TEXTURE_2D_LEVELS-1)));
  53
  54    tc = CALLOC_STRUCT( softpipe_tex_tile_cache );
  55    if (tc) {
  56       tc->pipe = pipe;
  57       for (pos = 0; pos < NUM_ENTRIES; pos++) {
  58          tc->entries[pos].addr.bits.invalid = 1;
  59       }
  60       tc->last_tile = &tc->entries[0]; /* any tile */
  61    }
  62    return tc;
  63 }
  64
  65
  66 void
  67 sp_destroy_tex_tile_cache(struct softpipe_tex_tile_cache *tc)
  68 {
  69    if (tc) {
  70       uint pos;
  71
  72       for (pos = 0; pos < NUM_ENTRIES; pos++) {
  73          /*assert(tc->entries[pos].x < 0);*/
  74       }
  75       if (tc->transfer) {
  76          tc->pipe->transfer_destroy(tc->pipe, tc->transfer);
  77       }
  78       if (tc->tex_trans) {
  79          tc->pipe->transfer_destroy(tc->pipe, tc->tex_trans);
  80       }
  81
  82       FREE( tc );
  83    }
  84 }
  85
  86
  87
  88
  89 void
  90 sp_tex_tile_cache_map_transfers(struct softpipe_tex_tile_cache *tc)
  91 {
  92    if (tc->tex_trans && !tc->tex_trans_map)
  93       tc->tex_trans_map = tc->pipe->transfer_map(tc->pipe, tc->tex_trans);
  94 }
  95
  96
  97 void
  98 sp_tex_tile_cache_unmap_transfers(struct softpipe_tex_tile_cache *tc)
  99 {
 100    if (tc->tex_trans_map) {
 101       tc->pipe->transfer_unmap(tc->pipe, tc->tex_trans);
 102       tc->tex_trans_map = NULL;
 103    }
 104 }
 105
 106 /**
 107  * Invalidate all cached tiles for the cached texture.
 108  * Should be called when the texture is modified.
 109  */
 110 void
 111 sp_tex_tile_cache_validate_texture(struct softpipe_tex_tile_cache *tc)
 112 {
 113    unsigned i;
 114
 115    assert(tc);
 116    assert(tc->texture);
 117
 118    for (i = 0; i < NUM_ENTRIES; i++) {
 119       tc->entries[i].addr.bits.invalid = 1;
 120    }
 121 }
 122
 123 static boolean
 124 sp_tex_tile_is_compat_view(struct softpipe_tex_tile_cache *tc,
 125                            struct pipe_sampler_view *view)
 126 {
 127    if (!view)
 128       return FALSE;
 129    return (tc->texture == view->texture &&
 130            tc->format == view->format &&
 131            tc->swizzle_r == view->swizzle_r &&
 132            tc->swizzle_g == view->swizzle_g &&
 133            tc->swizzle_b == view->swizzle_b &&
 134            tc->swizzle_a == view->swizzle_a);
 135 }
 136
 137 /**
 138  * Specify the sampler view to cache.
 139  */
 140 void
 141 sp_tex_tile_cache_set_sampler_view(struct softpipe_tex_tile_cache *tc,
 142                                    struct pipe_sampler_view *view)
 143 {
 144    struct pipe_resource *texture = view ? view->texture : NULL;
 145    uint i;
 146
 147    assert(!tc->transfer);
 148
 149    if (!sp_tex_tile_is_compat_view(tc, view)) {
 150       pipe_resource_reference(&tc->texture, texture);
 151
 152       if (tc->tex_trans) {
 153          if (tc->tex_trans_map) {
 154             tc->pipe->transfer_unmap(tc->pipe, tc->tex_trans);
 155             tc->tex_trans_map = NULL;
 156          }
 157
 158          tc->pipe->transfer_destroy(tc->pipe, tc->tex_trans);
 159          tc->tex_trans = NULL;
 160       }
 161
 162       if (view) {
 163          tc->swizzle_r = view->swizzle_r;
 164          tc->swizzle_g = view->swizzle_g;
 165          tc->swizzle_b = view->swizzle_b;
 166          tc->swizzle_a = view->swizzle_a;
 167          tc->format = view->format;
 168       }
 169
 170       /* mark as entries as invalid/empty */
 171       /* XXX we should try to avoid this when the teximage hasn't changed */
 172       for (i = 0; i < NUM_ENTRIES; i++) {
 173          tc->entries[i].addr.bits.invalid = 1;
 174       }
 175
 176       tc->tex_face = -1; /* any invalid value here */
 177    }
 178 }
 179
 180
 181
 182
 183 /**
 184  * Flush the tile cache: write all dirty tiles back to the transfer.
 185  * any tiles "flagged" as cleared will be "really" cleared.
 186  */
 187 void
 188 sp_flush_tex_tile_cache(struct softpipe_tex_tile_cache *tc)
 189 {
 190    int pos;
 191
 192    if (tc->texture) {
 193       /* caching a texture, mark all entries as empty */
 194       for (pos = 0; pos < NUM_ENTRIES; pos++) {
 195          tc->entries[pos].addr.bits.invalid = 1;
 196       }
 197       tc->tex_face = -1;
 198    }
 199
 200 }
 201
 202
 203 /**
 204  * Given the texture face, level, zslice, x and y values, compute
 205  * the cache entry position/index where we'd hope to find the
 206  * cached texture tile.
 207  * This is basically a direct-map cache.
 208  * XXX There's probably lots of ways in which we can improve this.
 209  */
 210 static INLINE uint
 211 tex_cache_pos( union tex_tile_address addr )
 212 {
 213    uint entry = (addr.bits.x +
 214                  addr.bits.y * 9 +
 215                  addr.bits.z * 3 +
 216                  addr.bits.face +
 217                  addr.bits.level * 7);
 218
 219    return entry % NUM_ENTRIES;
 220 }
 221
 222 /**
 223  * Similar to sp_get_cached_tile() but for textures.
 224  * Tiles are read-only and indexed with more params.
 225  */
 226 const struct softpipe_tex_cached_tile *
 227 sp_find_cached_tile_tex(struct softpipe_tex_tile_cache *tc,
 228                         union tex_tile_address addr )
 229 {
 230    struct softpipe_tex_cached_tile *tile;
 231
 232    tile = tc->entries + tex_cache_pos( addr );
 233
 234    if (addr.value != tile->addr.value) {
 235
 236       /* cache miss.  Most misses are because we've invaldiated the
 237        * texture cache previously -- most commonly on binding a new
 238        * texture.  Currently we effectively flush the cache on texture
 239        * bind.
 240        */
 241 #if 0
 242       _debug_printf("miss at %u:  x=%d y=%d z=%d face=%d level=%d\n"
 243                     "   tile %u:  x=%d y=%d z=%d face=%d level=%d\n",
 244                     pos, x/TILE_SIZE, y/TILE_SIZE, z, face, level,
 245                     pos, tile->addr.bits.x, tile->addr.bits.y, tile->z, tile->face, tile->level);
 246 #endif
 247
 248       /* check if we need to get a new transfer */
 249       if (!tc->tex_trans ||
 250           tc->tex_face != addr.bits.face ||
 251           tc->tex_level != addr.bits.level ||
 252           tc->tex_z != addr.bits.z) {
 253          /* get new transfer (view into texture) */
 254
 255          if (tc->tex_trans) {
 256             if (tc->tex_trans_map) {
 257                tc->pipe->transfer_unmap(tc->pipe, tc->tex_trans);
 258                tc->tex_trans_map = NULL;
 259             }
 260
 261             tc->pipe->transfer_destroy(tc->pipe, tc->tex_trans);
 262             tc->tex_trans = NULL;
 263          }
 264
 265          tc->tex_trans =
 266             pipe_get_transfer(tc->pipe, tc->texture,
 267                               addr.bits.level,
 268                               addr.bits.face + addr.bits.z,
 269                               PIPE_TRANSFER_READ | PIPE_TRANSFER_UNSYNCHRONIZED,
 270                               0, 0,
 271                               u_minify(tc->texture->width0, addr.bits.level),
 272                               u_minify(tc->texture->height0, addr.bits.level));
 273
 274          tc->tex_trans_map = tc->pipe->transfer_map(tc->pipe, tc->tex_trans);
 275
 276          tc->tex_face = addr.bits.face;
 277          tc->tex_level = addr.bits.level;
 278          tc->tex_z = addr.bits.z;
 279       }
 280
 281       /* get tile from the transfer (view into texture)
 282        * Note we're using the swizzle version of this fuction only because
 283        * we need to pass the texture cache's format explicitly.
 284        */
 285       pipe_get_tile_swizzle(tc->pipe,
 286                             tc->tex_trans,
 287                             addr.bits.x * TILE_SIZE,
 288                             addr.bits.y * TILE_SIZE,
 289                             TILE_SIZE,
 290                             TILE_SIZE,
 291                             PIPE_SWIZZLE_RED,
 292                             PIPE_SWIZZLE_GREEN,
 293                             PIPE_SWIZZLE_BLUE,
 294                             PIPE_SWIZZLE_ALPHA,
 295                             tc->format,
 296                             (float *) tile->data.color);
 297
 298       tile->addr = addr;
 299    }
 300
 301    tc->last_tile = tile;
 302    return tile;
 303 }