1 2 /********************************************************** 3 * Copyright 2008-2009 VMware, Inc. All rights reserved. 4 * 5 * Permission is hereby granted, free of charge, to any person 6 * obtaining a copy of this software and associated documentation 7 * files (the "Software"), to deal in the Software without 8 * restriction, including without limitation the rights to use, copy, 9 * modify, merge, publish, distribute, sublicense, and/or sell copies 10 * of the Software, and to permit persons to whom the Software is 11 * furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be 14 * included in all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 17 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 18 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 19 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 20 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 21 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 22 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 23 * SOFTWARE. 24 * 25 **********************************************************/ 26 27 #ifndef SVGA_SCREEN_CACHE_H_ 28 #define SVGA_SCREEN_CACHE_H_ 29 30 31 #include "svga_types.h" 32 #include "svga_reg.h" 33 #include "svga3d_reg.h" 34 35 #include "os/os_thread.h" 36 37 #include "util/u_double_list.h" 38 39 40 /* Guess the storage size of cached surfaces and try and keep it under 41 * this amount: 42 */ 43 #define SVGA_HOST_SURFACE_CACHE_BYTES (16 * 1024 * 1024) 44 45 /* Maximum number of discrete surfaces in the cache: 46 */ 47 #define SVGA_HOST_SURFACE_CACHE_SIZE 1024 48 49 /* Number of hash buckets: 50 */ 51 #define SVGA_HOST_SURFACE_CACHE_BUCKETS 256 52 53 54 struct svga_winsys_surface; 55 struct svga_screen; 56 57 /** 58 * Same as svga_winsys_screen::surface_create. 59 */ 60 struct svga_host_surface_cache_key 61 { 62 SVGA3dSurfaceFlags flags; 63 SVGA3dSurfaceFormat format; 64 SVGA3dSize size; 65 uint32_t numFaces:24; 66 uint32_t numMipLevels:7; 67 uint32_t cachable:1; /* False if this is a shared surface */ 68 }; 69 70 71 struct svga_host_surface_cache_entry 72 { 73 /** 74 * Head for the LRU list, svga_host_surface_cache::unused, and 75 * svga_host_surface_cache::empty 76 */ 77 struct list_head head; 78 79 /** Head for the bucket lists. */ 80 struct list_head bucket_head; 81 82 struct svga_host_surface_cache_key key; 83 struct svga_winsys_surface *handle; 84 85 struct pipe_fence_handle *fence; 86 }; 87 88 89 /** 90 * Cache of the host surfaces. 91 * 92 * A cache entry can be in the following stages: 93 * 1. empty (entry->handle = NULL) 94 * 2. holding a buffer in a validate list 95 * 3. holding a flushed buffer (not in any validate list) with an active fence 96 * 4. holding a flushed buffer with an expired fence 97 * 98 * An entry progresses from 1 -> 2 -> 3 -> 4. When we need an entry to put a 99 * buffer into we preferencial take from 1, or from the least recentely used 100 * buffer from 3/4. 101 */ 102 struct svga_host_surface_cache 103 { 104 pipe_mutex mutex; 105 106 /* Unused buffers are put in buckets to speed up lookups */ 107 struct list_head bucket[SVGA_HOST_SURFACE_CACHE_BUCKETS]; 108 109 /* Entries with unused buffers, ordered from most to least recently used 110 * (3 and 4) */ 111 struct list_head unused; 112 113 /* Entries with buffers still in validate lists (2) */ 114 struct list_head validated; 115 116 /** Empty entries (1) */ 117 struct list_head empty; 118 119 /** The actual storage for the entries */ 120 struct svga_host_surface_cache_entry entries[SVGA_HOST_SURFACE_CACHE_SIZE]; 121 122 /** Sum of sizes of all surfaces (in bytes) */ 123 unsigned total_size; 124 }; 125 126 127 void 128 svga_screen_cache_cleanup(struct svga_screen *svgascreen); 129 130 void 131 svga_screen_cache_flush(struct svga_screen *svgascreen, 132 struct pipe_fence_handle *fence); 133 134 enum pipe_error 135 svga_screen_cache_init(struct svga_screen *svgascreen); 136 137 138 struct svga_winsys_surface * 139 svga_screen_surface_create(struct svga_screen *svgascreen, 140 struct svga_host_surface_cache_key *key); 141 142 void 143 svga_screen_surface_destroy(struct svga_screen *svgascreen, 144 const struct svga_host_surface_cache_key *key, 145 struct svga_winsys_surface **handle); 146 147 148 #endif /* SVGA_SCREEN_CACHE_H_ */ 149