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 * Copyright 2008-2009 VMware, Inc.  All rights reserved.

 *

 * Permission is hereby granted, free of charge, to any person

 * obtaining a copy of this software and associated documentation

 * files (the "Software"), to deal in the Software without

 * restriction, including without limitation the rights to use, copy,

 * modify, merge, publish, distribute, sublicense, and/or sell copies

 * of the Software, and to permit persons to whom the Software is

 * furnished to do so, subject to the following conditions:

 *

 * The above copyright notice and this permission notice shall be

 * included in all copies or substantial portions of the Software.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,

 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF

 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND

 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS

 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN

 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN

 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE

 * SOFTWARE.

 *

 **********************************************************/

#define SVGA_SCREEN_CACHE_H_

#include "svga_reg.h"

#include "svga3d_reg.h"

 * this amount:

 */

#define SVGA_HOST_SURFACE_CACHE_BYTES (16 * 1024 * 1024)

 */

#define SVGA_HOST_SURFACE_CACHE_SIZE 1024

 */

#define SVGA_HOST_SURFACE_CACHE_BUCKETS 256

struct svga_screen;

 * Same as svga_winsys_screen::surface_create.

 */

struct svga_host_surface_cache_key

{

   SVGA3dSurfaceFlags flags;

   SVGA3dSurfaceFormat format;

   SVGA3dSize size;

   uint32_t numFaces:24;

   uint32_t numMipLevels:7;

   uint32_t cachable:1;         /* False if this is a shared surface */

};

{

   /**

    * Head for the LRU list, svga_host_surface_cache::unused, and

    * svga_host_surface_cache::empty

    */

   struct list_head head;

   struct list_head bucket_head;

   struct svga_winsys_surface *handle;

};

 * Cache of the host surfaces.

 *

 * A cache entry can be in the following stages:

 * 1. empty (entry->handle = NULL)

 * 2. holding a buffer in a validate list

 * 3. holding a flushed buffer (not in any validate list) with an active fence

 * 4. holding a flushed buffer with an expired fence

 *

 * An entry progresses from 1 -> 2 -> 3 -> 4. When we need an entry to put a

 * buffer into we preferentially take from 1, or from the least recently used

 * buffer from 3/4.

 */

struct svga_host_surface_cache

{

   pipe_mutex mutex;

   struct list_head bucket[SVGA_HOST_SURFACE_CACHE_BUCKETS];

    * (3 and 4) */

   struct list_head unused;

   struct list_head validated;

   struct list_head empty;

   struct svga_host_surface_cache_entry entries[SVGA_HOST_SURFACE_CACHE_SIZE];

   unsigned total_size;

};

svga_screen_cache_cleanup(struct svga_screen *svgascreen);

svga_screen_cache_flush(struct svga_screen *svgascreen,

                        struct pipe_fence_handle *fence);

svga_screen_cache_init(struct svga_screen *svgascreen);

svga_screen_surface_create(struct svga_screen *svgascreen,

                           struct svga_host_surface_cache_key *key);

svga_screen_surface_destroy(struct svga_screen *svgascreen,

                            const struct svga_host_surface_cache_key *key,

                            struct svga_winsys_surface **handle);

svga_screen_cache_dump(const struct svga_screen *svgascreen);