gallium: Simplify winsys buffer interface.
The properties of a buffer represented by struct pipe_buffer_handle are now
basically constant over its lifetime. The state tracker gets to deal with any
more complex buffer semantics it may need to provide.
diff --git a/src/mesa/pipe/p_defines.h b/src/mesa/pipe/p_defines.h
index 50bea69..90eebd5 100644
--- a/src/mesa/pipe/p_defines.h
+++ b/src/mesa/pipe/p_defines.h
@@ -178,25 +178,19 @@
/**
- * Buffer access flags
- */
-#define PIPE_BUFFER_FLAG_READ 0x1
-#define PIPE_BUFFER_FLAG_WRITE 0x2
-#define PIPE_BUFFER_FLAG_MEM_LOCAL 0x4
-#define PIPE_BUFFER_FLAG_CACHED 0x8
-#define PIPE_BUFFER_FLAG_CUSTOM (1<<16)
-
-
-
-/**
* Buffer usage flags
*/
-#define PIPE_BUFFER_USAGE_PIXEL (1 << 0)
-#define PIPE_BUFFER_USAGE_VERTEX (1 << 1)
-#define PIPE_BUFFER_USAGE_INDEX (1 << 2)
-#define PIPE_BUFFER_USAGE_CONSTANT (1 << 3)
+#define PIPE_BUFFER_USAGE_CPU_READ (1 << 0)
+#define PIPE_BUFFER_USAGE_CPU_WRITE (1 << 1)
+#define PIPE_BUFFER_USAGE_GPU_READ (1 << 2)
+#define PIPE_BUFFER_USAGE_GPU_WRITE (1 << 3)
+#define PIPE_BUFFER_USAGE_PIXEL (1 << 4)
+#define PIPE_BUFFER_USAGE_VERTEX (1 << 5)
+#define PIPE_BUFFER_USAGE_INDEX (1 << 6)
+#define PIPE_BUFFER_USAGE_CONSTANT (1 << 7)
/** Pipe driver custam usage flags should be greater or equal to this value */
-#define PIPE_BUFFER_USAGE_CUSTOM (1 << 16)
+#define PIPE_BUFFER_USAGE_CUSTOM (1 << 16)
+
/**
* Flush types: