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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.
*
**********************************************************/
#ifndef SVGA_SCREEN_CACHE_H_
#define SVGA_SCREEN_CACHE_H_
#include "svga_types.h"
#include "svga_reg.h"
#include "svga3d_reg.h"
#include "os/os_thread.h"
#include "util/list.h"
/* Guess the storage size of cached surfaces and try and keep it under
* this amount:
*/
#define SVGA_HOST_SURFACE_CACHE_BYTES (16 * 1024 * 1024)
/* Maximum number of discrete surfaces in the cache:
*/
#define SVGA_HOST_SURFACE_CACHE_SIZE 1024
/* Number of hash buckets:
*/
#define SVGA_HOST_SURFACE_CACHE_BUCKETS 256
struct svga_winsys_surface;
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:3;
uint32_t arraySize:16;
uint32_t numMipLevels:6;
uint32_t cachable:1; /* False if this is a shared surface */
uint32_t sampleCount:5;
uint32_t scanout:1;
};
struct svga_host_surface_cache_entry
{
/**
* Head for the LRU list, svga_host_surface_cache::unused, and
* svga_host_surface_cache::empty
*/
struct list_head head;
/** Head for the bucket lists. */
struct list_head bucket_head;
struct svga_host_surface_cache_key key;
struct svga_winsys_surface *handle;
struct pipe_fence_handle *fence;
};
/**
* 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;
/* Unused buffers are put in buckets to speed up lookups */
struct list_head bucket[SVGA_HOST_SURFACE_CACHE_BUCKETS];
/* Entries with unused buffers, ordered from most to least recently used
* (3 and 4) */
struct list_head unused;
/* Entries with buffers still in validate lists (2) */
struct list_head validated;
/** Empty entries (1) */
struct list_head empty;
/** The actual storage for the entries */
struct svga_host_surface_cache_entry entries[SVGA_HOST_SURFACE_CACHE_SIZE];
/** Sum of sizes of all surfaces (in bytes) */
unsigned total_size;
};
void
svga_screen_cache_cleanup(struct svga_screen *svgascreen);
void
svga_screen_cache_flush(struct svga_screen *svgascreen,
struct pipe_fence_handle *fence);
enum pipe_error
svga_screen_cache_init(struct svga_screen *svgascreen);
struct svga_winsys_surface *
svga_screen_surface_create(struct svga_screen *svgascreen,
unsigned bind_flags, unsigned usage,
struct svga_host_surface_cache_key *key);
void
svga_screen_surface_destroy(struct svga_screen *svgascreen,
const struct svga_host_surface_cache_key *key,
struct svga_winsys_surface **handle);
void
svga_screen_cache_dump(const struct svga_screen *svgascreen);
#endif /* SVGA_SCREEN_CACHE_H_ */
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