From ba1b1ae3806490cce16a9c8957b52cd74967f463 Mon Sep 17 00:00:00 2001
From: Jeff Hartmann <jhartmann@valinux.com>
Date: Tue, 4 Apr 2000 22:08:14 +0000
Subject: Merged mga branch with trunk

---
 linux-core/i810_drm.h | 93 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 93 insertions(+)
 create mode 100644 linux-core/i810_drm.h

(limited to 'linux-core/i810_drm.h')

diff --git a/linux-core/i810_drm.h b/linux-core/i810_drm.h
new file mode 100644
index 00000000..0754874c
--- /dev/null
+++ b/linux-core/i810_drm.h
@@ -0,0 +1,93 @@
+#ifndef _I810_DRM_H_
+#define _I810_DRM_H_
+
+/* WARNING: These defines must be the same as what the Xserver uses.
+ * if you change them, you must change the defines in the Xserver.
+ */
+
+/* Might one day want to support the client-side ringbuffer code again.
+ */
+#ifndef _I810_DEFINES_
+#define _I810_DEFINES_
+
+#define I810_USE_BATCH			1
+#define I810_DMA_BUF_ORDER		12
+#define I810_DMA_BUF_SZ 		(1<<I810_DMA_BUF_ORDER)
+#define I810_DMA_BUF_NR 		256
+#define I810_NR_SAREA_CLIPRECTS 	2
+
+/* Each region is a minimum of 64k, and there are at most 64 of them.
+ */
+
+#define I810_NR_TEX_REGIONS 64
+#define I810_LOG_MIN_TEX_REGION_SIZE 16
+#endif
+
+typedef struct _drm_i810_init {
+   	enum {
+	   	I810_INIT_DMA = 0x01,
+	   	I810_CLEANUP_DMA = 0x02
+	} func;
+   	int ring_map_idx;
+      	int buffer_map_idx;
+	int sarea_priv_offset;
+   	unsigned long ring_start;
+   	unsigned long ring_end;
+   	unsigned long ring_size;
+} drm_i810_init_t;
+
+/* Warning: If you change the SAREA structure you must change the Xserver
+ * structure as well */
+
+typedef struct _drm_i810_tex_region {
+	unsigned char next, prev; /* indices to form a circular LRU  */
+	unsigned char in_use;	/* owned by a client, or free? */
+	int age;		/* tracked by clients to update local LRU's */
+} drm_i810_tex_region_t;
+
+typedef struct _drm_i810_sarea {
+	unsigned int nbox;
+	drm_clip_rect_t boxes[I810_NR_SAREA_CLIPRECTS];
+
+	/* 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 global 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.  
+	 */
+   
+	drm_i810_tex_region_t texList[I810_NR_TEX_REGIONS+1]; 
+				/* Last elt is sentinal */
+        int texAge;		/* last time texture was uploaded */
+        int last_enqueue;	/* last time a buffer was enqueued */
+	int last_dispatch;	/* age of the most recently dispatched buffer */
+	int last_quiescent;     /*  */
+	int ctxOwner;		/* last context to upload state */
+} drm_i810_sarea_t;
+
+typedef struct _drm_i810_general {
+   	int idx;
+	int used;
+} drm_i810_general_t;
+
+/* These may be placeholders if we have more cliprects than
+ * I810_NR_SAREA_CLIPRECTS.  In that case, the client sets discard to
+ * false, indicating that the buffer will be dispatched again with a
+ * new set of cliprects.
+ */
+typedef struct _drm_i810_vertex {
+   	int idx;		/* buffer index */
+	int used;		/* nr bytes in use */
+	int discard;		/* client is finished with the buffer? */
+} drm_i810_vertex_t;
+
+#endif /* _I810_DRM_H_ */
-- 
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