src/gallium/drivers/svga/svga_screen_cache.h

   1 /**********************************************************
   2  * Copyright 2008-2009 VMware, Inc.  All rights reserved.
   3  *
   4  * Permission is hereby granted, free of charge, to any person
   5  * obtaining a copy of this software and associated documentation
   6  * files (the "Software"), to deal in the Software without
   7  * restriction, including without limitation the rights to use, copy,
   8  * modify, merge, publish, distribute, sublicense, and/or sell copies
   9  * of the Software, and to permit persons to whom the Software is
  10  * furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice shall be
  13  * included in all copies or substantial portions of the Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  16  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  17  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  18  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  19  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  20  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  21  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  22  * SOFTWARE.
  23  *
  24  **********************************************************/
  25
  26 #ifndef SVGA_SCREEN_CACHE_H_
  27 #define SVGA_SCREEN_CACHE_H_
  28
  29
  30 #include "svga_types.h"
  31 #include "svga_reg.h"
  32 #include "svga3d_reg.h"
  33
  34 #include "pipe/p_thread.h"
  35
  36 #include "util/u_double_list.h"
  37
  38
  39 /* TODO: Reduce this once we don't allocate an index buffer per draw call */
  40 #define SVGA_HOST_SURFACE_CACHE_SIZE 1024
  41
  42 #define SVGA_HOST_SURFACE_CACHE_BUCKETS 64
  43
  44
  45 struct svga_winsys_surface;
  46 struct svga_screen;
  47
  48 /**
  49  * Same as svga_winsys_screen::surface_create.
  50  */
  51 struct svga_host_surface_cache_key
  52 {
  53    SVGA3dSurfaceFlags flags;
  54    SVGA3dSurfaceFormat format;
  55    SVGA3dSize size;
  56    uint32_t numFaces;
  57    uint32_t numMipLevels;
  58 };
  59
  60
  61 struct svga_host_surface_cache_entry
  62 {
  63    /**
  64     * Head for the LRU list, svga_host_surface_cache::unused, and
  65     * svga_host_surface_cache::empty
  66     */
  67    struct list_head head;
  68
  69    /** Head for the bucket lists. */
  70    struct list_head bucket_head;
  71
  72    struct svga_host_surface_cache_key key;
  73    struct svga_winsys_surface *handle;
  74
  75    struct pipe_fence_handle *fence;
  76 };
  77
  78
  79 /**
  80  * Cache of the host surfaces.
  81  *
  82  * A cache entry can be in the following stages:
  83  * 1. empty
  84  * 2. holding a buffer in a validate list
  85  * 3. holding a flushed buffer (not in any validate list) with an active fence
  86  * 4. holding a flushed buffer with an expired fence
  87  *
  88  * An entry progresses from 1 -> 2 -> 3 -> 4. When we need an entry to put a
  89  * buffer into we preferencial take from 1, or from the least recentely used
  90  * buffer from 3/4.
  91  */
  92 struct svga_host_surface_cache
  93 {
  94    pipe_mutex mutex;
  95
  96    /* Unused buffers are put in buckets to speed up lookups */
  97    struct list_head bucket[SVGA_HOST_SURFACE_CACHE_BUCKETS];
  98
  99    /* Entries with unused buffers, ordered from most to least recently used
 100     * (3 and 4) */
 101    struct list_head unused;
 102
 103    /* Entries with buffers still in validate lists (2) */
 104    struct list_head validated;
 105
 106    /** Empty entries (1) */
 107    struct list_head empty;
 108
 109    /** The actual storage for the entries */
 110    struct svga_host_surface_cache_entry entries[SVGA_HOST_SURFACE_CACHE_SIZE];
 111 };
 112
 113
 114 void
 115 svga_screen_cache_cleanup(struct svga_screen *svgascreen);
 116
 117 void
 118 svga_screen_cache_flush(struct svga_screen *svgascreen,
 119                         struct pipe_fence_handle *fence);
 120
 121 enum pipe_error
 122 svga_screen_cache_init(struct svga_screen *svgascreen);
 123
 124
 125 struct svga_winsys_surface *
 126 svga_screen_surface_create(struct svga_screen *svgascreen,
 127                            struct svga_host_surface_cache_key *key);
 128
 129 void
 130 svga_screen_surface_destroy(struct svga_screen *svgascreen,
 131                             const struct svga_host_surface_cache_key *key,
 132                             struct svga_winsys_surface **handle);
 133
 134
 135 #endif /* SVGA_SCREEN_CACHE_H_ */