1 files changed, 144 insertions, 0 deletions
diff --git a/src/gallium/drivers/svga/svga_screen_cache.h b/src/gallium/drivers/svga/svga_screen_cache.h
new file mode 100644
index 00000000000..f5aa740d408
--- /dev/null
+++ b/src/gallium/drivers/svga/svga_screen_cache.h
@@ -0,0 +1,144 @@
+/**********************************************************
+ * 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 "pipe/p_thread.h"
+
+#include "util/u_double_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:24;
+   uint32_t numMipLevels:7;
+   uint32_t cachable:1;         /* False if this is a shared surface */
+};
+
+
+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
+ * 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 preferencial take from 1, or from the least recentely 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];
+};
+
+
+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,
+                           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);
+
+
+#endif /* SVGA_SCREEN_CACHE_H_ */