1 files changed, 44 insertions, 0 deletions
diff --git a/xc/programs/Xserver/hw/xfree86/drivers/i810/i810_sarea.h b/xc/programs/Xserver/hw/xfree86/drivers/i810/i810_sarea.h
new file mode 100644
index 000000000..3dd0ada84
--- /dev/null
+++ b/xc/programs/Xserver/hw/xfree86/drivers/i810/i810_sarea.h
@@ -0,0 +1,44 @@
+#ifndef I810_SAPRIV_H
+#define I810_SAPRIV_H
+
+/* Each region is a minimum of 32k, and there are at most 128 of them.
+ */
+#define I810_NR_TEX_REGIONS 128
+
+ 
+
+typedef struct {
+   unsigned char next, prev;	/* array indices to form a circular LRU list */
+   unsigned char in_use;	/* owned by a client, or free? */
+   int age;			/* tracked by clients to update local LRU's */
+} i810TexRegion;
+
+typedef struct {
+   int ringOwner;		             /* not used */
+   int ctxOwner;		             /* last context to upload state */
+
+   /* Maintain an LRU of contiguous regions of texture space.  If
+    * you think you own a region of texture memory, and it has an age
+    * different to the one you set, then you are mistaken and it has
+    * been stolen by another client.  If texAge hasn't changed, there 
+    * is no need to walk the list.
+    *
+    * These regions can be used as a proxy for the fine-grained texture
+    * information of other clients - by maintaining them in the same
+    * lru which is used to age their own textures, clients have an
+    * approximate lru for the whole of global texture space, and can
+    * make informed decisions as to which areas to kick out.  There is
+    * no need to choose whether to kick out your own texture or someone
+    * else's - simply eject them all in LRU order.
+    */
+   i810TexRegion texList[I810_NR_TEX_REGIONS+1]; /* Last element is sentinal */
+   int texAge;	                                 /* Current age counter */
+
+
+   int lastWrap;
+   int lastSync;
+   int ringAge;
+
+} I810SAREAPriv;
+
+#endif