From ae96e264198323916ee58e293468c9b924feca75 Mon Sep 17 00:00:00 2001
From: Thomas Hellstrom <thomas-at-tungstengraphics-dot-com>
Date: Fri, 29 Sep 2006 11:46:45 +0200
Subject: Add a new buffer flag. Fix up some comments.
---
shared-core/drm.h | 23 +++++++++++++++--------
1 file changed, 15 insertions(+), 8 deletions(-)
diff --git a/shared-core/drm.h b/shared-core/drm.h
index 8ac5a31e..095823b7 100644
--- a/shared-core/drm.h
+++ b/shared-core/drm.h
@@ -696,21 +696,28 @@ typedef struct drm_ttm_arg {
* Status flags. Can be read to determine the actual state of a buffer.
*/
-/* Pinned buffer. */
+/*
+ * Cannot evict this buffer. Not even with force. This type of buffer should
+ * only be available for root, and must be manually removed before buffer
+ * manager shutdown or swapout.
+ */
#define DRM_BO_FLAG_NO_EVICT 0x00000010
/* Always keep a system memory shadow to a vram buffer */
#define DRM_BO_FLAG_SHADOW_VRAM 0x00000020
-/* When mapped for reading, make sure the buffer is cached even
- if it means moving the buffer to system memory */
+/* The buffer is shareable with other processes */
#define DRM_BO_FLAG_SHAREABLE 0x00000040
-/* When there is a choice between VRAM and TT, prefer VRAM.
- The default behaviour is to prefer TT. */
+/* The buffer is currently cached */
#define DRM_BO_FLAG_CACHED 0x00000080
-/* The buffer is shareable with other processes */
-
+/* Make sure that every time this buffer is validated, it ends up on the same
+ * location. The buffer will also not be evicted when claiming space for
+ * other buffers. Basically a pinned buffer but it may be thrown out as
+ * part of buffer manager shutdown or swapout. Not supported yet.*/
+#define DRM_BO_FLAG_NO_MOVE 0x00000100
+/* Make sure the buffer is in cached memory when mapped for reading */
#define DRM_BO_FLAG_READ_CACHED 0x00080000
-/* The buffer is currently cached */
+/* When there is a choice between VRAM and TT, prefer VRAM.
+ The default behaviour is to prefer TT. */
#define DRM_BO_FLAG_PREFER_VRAM 0x00040000
/* Bind this buffer cached if the hardware supports it. */
#define DRM_BO_FLAG_BIND_CACHED 0x0002000
--
cgit v1.2.3