[Intel-gfx] [PATCH] Use drm_intel_bo_disable_reuse API to flag scanout and cursor buffers

[Keith Packard]

Buffers referenced by the kernel for scanout or cursor display should not be
reused by the driver. Use the new drm API to disable reuse of these buffers.

Signed-off-by: Keith Packard <keithp at keithp.com>
---
 src/i830.h        |    1 +
 src/i830_memory.c |    7 ++++++-
 2 files changed, 7 insertions(+), 1 deletions(-)

diff --git a/src/i830.h b/src/i830.h
index 207d4ec..3cd01a3 100644
--- a/src/i830.h
+++ b/src/i830.h
@@ -901,6 +901,7 @@ extern const int I830CopyROP[16];
 #define NEED_NON_STOLEN			0x00000004
 #define NEED_LIFETIME_FIXED		0x00000008
 #define ALLOW_SHARING			0x00000010
+#define DISABLE_REUSE			0x00000020
 
 /* Chipset registers for VIDEO BIOS memory RW access */
 #define _855_DRAM_RW_CONTROL 0x58
diff --git a/src/i830_memory.c b/src/i830_memory.c
index d5827f8..192cbdb 100644
--- a/src/i830_memory.c
+++ b/src/i830_memory.c
@@ -798,6 +798,9 @@ i830_allocate_memory_bo(ScrnInfoPtr pScrn, const char *name,
 	}
     }
 
+    if (flags & DISABLE_REUSE)
+	drm_intel_bo_disable_reuse(mem->bo);
+
     /* Insert new allocation into the list */
     mem->prev = NULL;
     mem->next = pI830->bo_list;
@@ -1075,7 +1078,7 @@ i830_allocate_framebuffer(ScrnInfoPtr pScrn)
     i830_memory *front_buffer = NULL;
     enum tile_format tile_format = TILE_NONE;
 
-    flags = ALLOW_SHARING;
+    flags = ALLOW_SHARING|DISABLE_REUSE;
 
     /* We'll allocate the fb such that the root window will fit regardless of
      * rotation.
@@ -1142,6 +1145,8 @@ i830_allocate_cursor_buffers(ScrnInfoPtr pScrn)
 
     flags = pI830->CursorNeedsPhysical ? NEED_PHYSICAL_ADDR : 0;
 
+    flags |= DISABLE_REUSE;
+
     /* Try to allocate one big blob for our cursor memory.  This works
      * around a limitation in the FreeBSD AGP driver that allows only one
      * physical allocation larger than a page, and could allow us
-- 
1.6.3